ecos: packages/net/tcpip/current/src/sys/netinet/ip

annotate packages/net/tcpip/current/src/sys/netinet/ip_input.c @ 115:6ed91473a1cd ecos-sw-2000-08-21

Merge from eCos master repository on 2000-08-21-22:40:54-BST

author	jlarmour
date	Fri, 25 Aug 2000 17:32:38 +0000
parents	ced4577552cd
children	e0c0827131d1

rev	line source
97 ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1 //==========================================================================
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	2 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	3 // sys/netinet/ip_input.c
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	4 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	5 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	6 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	7 //==========================================================================
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	8 //####COPYRIGHTBEGIN####
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	9 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	10 // -------------------------------------------
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	11 // The contents of this file are subject to the Red Hat eCos Public License
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	12 // Version 1.1 (the "License"); you may not use this file except in
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	13 // compliance with the License. You may obtain a copy of the License at
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	14 // http://www.redhat.com/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	15 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	16 // Software distributed under the License is distributed on an "AS IS"
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	18 // License for the specific language governing rights and limitations under
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	19 // the License.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	20 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	21 // The Original Code is eCos - Embedded Configurable Operating System,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	22 // released September 30, 1998.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	23 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	24 // The Initial Developer of the Original Code is Red Hat.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	25 // Portions created by Red Hat are
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	27 // All Rights Reserved.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	28 // -------------------------------------------
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	29 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	30 //####COPYRIGHTEND####
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	31 //####BSDCOPYRIGHTBEGIN####
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	32 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	33 // -------------------------------------------
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	34 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	35 // Portions of this software may have been derived from OpenBSD or other sources,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	36 // and are covered by the appropriate copyright disclaimers included herein.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	37 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	38 // -------------------------------------------
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	39 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	40 //####BSDCOPYRIGHTEND####
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	41 //==========================================================================
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	42 //#####DESCRIPTIONBEGIN####
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	43 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	44 // Author(s): gthomas
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	45 // Contributors: gthomas
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	46 // Date: 2000-01-10
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	47 // Purpose:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	48 // Description:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	49 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	50 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	51 //####DESCRIPTIONEND####
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	52 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	53 //==========================================================================
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	54
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	55
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	56 /* $OpenBSD: ip_input.c,v 1.44 1999/12/08 06:50:20 itojun Exp $ */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	57 /* $NetBSD: ip_input.c,v 1.30 1996/03/16 23:53:58 christos Exp $ */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	58
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	59 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	60 * Copyright (c) 1982, 1986, 1988, 1993
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	61 * The Regents of the University of California. All rights reserved.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	62 *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	63 * Redistribution and use in source and binary forms, with or without
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	64 * modification, are permitted provided that the following conditions
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	65 * are met:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	66 * 1. Redistributions of source code must retain the above copyright
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	67 * notice, this list of conditions and the following disclaimer.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	68 * 2. Redistributions in binary form must reproduce the above copyright
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	69 * notice, this list of conditions and the following disclaimer in the
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	70 * documentation and/or other materials provided with the distribution.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	71 * 3. All advertising materials mentioning features or use of this software
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	72 * must display the following acknowledgement:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	73 * This product includes software developed by the University of
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	74 * California, Berkeley and its contributors.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	75 * 4. Neither the name of the University nor the names of its contributors
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	76 * may be used to endorse or promote products derived from this software
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	77 * without specific prior written permission.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	78 *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	79 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	80 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	81 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	82 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	83 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	84 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	85 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	86 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	87 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	88 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	89 * SUCH DAMAGE.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	90 *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	91 * @(#)ip_input.c 8.2 (Berkeley) 1/4/94
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	92 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	93
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	94 #include <sys/param.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	95 #ifndef __ECOS
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	96 #include <sys/systm.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	97 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	98 #include <sys/malloc.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	99 #include <sys/mbuf.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	100 #include <sys/domain.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	101 #include <sys/protosw.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	102 #include <sys/socket.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	103 #include <sys/errno.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	104 #include <sys/time.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	105 #include <sys/kernel.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	106 #ifndef __ECOS
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	107 #include <sys/syslog.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	108 #include <sys/proc.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	109
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	110 #include <vm/vm.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	111 #include <sys/sysctl.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	112 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	113
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	114 #include <net/if.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	115 #include <net/if_dl.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	116 #include <net/route.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	117
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	118 #include <netinet/in.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	119 #include <netinet/in_systm.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	120 #include <netinet/if_ether.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	121 #include <netinet/ip.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	122 #include <netinet/in_pcb.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	123 #include <netinet/in_var.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	124 #include <netinet/ip_var.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	125 #include <netinet/ip_icmp.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	126 #include <netinet/ip_ipsp.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	127
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	128 #ifdef __ECOS
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	129 #include <stdio.h> // for 'sprintf()'
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	130 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	131
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	132 #ifndef IPFORWARDING
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	133 #ifdef GATEWAY
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	134 #define IPFORWARDING 1 /* forward IP packets not for us */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	135 #else /* GATEWAY */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	136 #define IPFORWARDING 0 /* don't forward IP packets not for us */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	137 #endif /* GATEWAY */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	138 #endif /* IPFORWARDING */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	139 #ifndef IPSENDREDIRECTS
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	140 #define IPSENDREDIRECTS 1
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	141 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	142
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	143 int encdebug = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	144
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	145 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	146 * Note: DIRECTED_BROADCAST is handled this way so that previous
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	147 * configuration using this option will Just Work.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	148 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	149 #ifndef IPDIRECTEDBCAST
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	150 #ifdef DIRECTED_BROADCAST
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	151 #define IPDIRECTEDBCAST 1
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	152 #else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	153 #define IPDIRECTEDBCAST 0
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	154 #endif /* DIRECTED_BROADCAST */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	155 #endif /* IPDIRECTEDBCAST */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	156 int ipforwarding = IPFORWARDING;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	157 int ipsendredirects = IPSENDREDIRECTS;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	158 int ip_dosourceroute = 0; /* no src-routing unless sysctl'd to enable */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	159 int ip_defttl = IPDEFTTL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	160 int ip_directedbcast = IPDIRECTEDBCAST;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	161 #ifdef DIAGNOSTIC
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	162 int ipprintfs = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	163 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	164
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	165 int ipsec_auth_default_level = IPSEC_AUTH_LEVEL_DEFAULT;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	166 int ipsec_esp_trans_default_level = IPSEC_ESP_TRANS_LEVEL_DEFAULT;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	167 int ipsec_esp_network_default_level = IPSEC_ESP_NETWORK_LEVEL_DEFAULT;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	168
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	169 /* Keep track of memory used for reassembly */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	170 int ip_maxqueue = 300;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	171 int ip_frags = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	172
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	173 /* from in_pcb.c */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	174 extern int ipport_firstauto;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	175 extern int ipport_lastauto;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	176 extern int ipport_hifirstauto;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	177 extern int ipport_hilastauto;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	178 extern struct baddynamicports baddynamicports;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	179
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	180 extern struct domain inetdomain;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	181 extern struct protosw inetsw[];
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	182 u_char ip_protox[IPPROTO_MAX];
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	183 int ipqmaxlen = IFQ_MAXLEN;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	184 struct in_ifaddrhead in_ifaddr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	185 struct ifqueue ipintrq;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	186 #if defined(IPFILTER) \|\| defined(IPFILTER_LKM)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	187 int (fr_checkp) __P((struct ip , int, struct ifnet *, int,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	188 struct mbuf **));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	189 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	190
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	191 int ipq_locked;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	192 static __inline int ipq_lock_try __P((void));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	193 static __inline void ipq_unlock __P((void));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	194
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	195 static __inline int
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	196 ipq_lock_try()
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	197 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	198 int s;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	199
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	200 s = splimp();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	201 if (ipq_locked) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	202 splx(s);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	203 return (0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	204 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	205 ipq_locked = 1;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	206 splx(s);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	207 return (1);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	208 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	209
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	210 #define ipq_lock() ipq_lock_try()
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	211
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	212 static __inline void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	213 ipq_unlock()
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	214 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	215 int s;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	216
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	217 s = splimp();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	218 ipq_locked = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	219 splx(s);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	220 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	221
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	222 static char ui8tod( cyg_uint8 n, char p )
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	223 {
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	224 if( n > 99 ) *p++ = (n/100) + '0';
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	225 if( n > 9 ) *p++ = ((n/10)%10) + '0';
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	226 *p++ = (n%10) + '0';
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	227 return p;
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	228 }
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	229
97 ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	230 char *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	231 inet_ntoa(ina)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	232 struct in_addr ina;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	233 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	234 static char buf[4*sizeof "123"];
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	235 char *p = buf;
97 ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	236 unsigned char ucp = (unsigned char )&ina;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	237
115 6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	238 // sprintf(buf, "%d.%d.%d.%d", ucp[0] & 0xff, ucp[1] & 0xff,
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	239 // ucp[2] & 0xff, ucp[3] & 0xff);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	240
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	241 p = ui8tod( ucp[0] & 0xFF, p);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	242 *p++ = '.';
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	243 p = ui8tod( ucp[1] & 0xFF, p);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	244 *p++ = '.';
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	245 p = ui8tod( ucp[2] & 0xFF, p);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	246 *p++ = '.';
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	247 p = ui8tod( ucp[3] & 0xFF, p);
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	248 *p++ = '\0';
6ed91473a1cd Merge from eCos master repository on 2000-08-21-22:40:54-BST jlarmour parents: 97 diff changeset	249
97 ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	250 return (buf);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	251 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	252
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	253 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	254 * We need to save the IP options in case a protocol wants to respond
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	255 * to an incoming packet over the same route if the packet got here
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	256 * using IP source routing. This allows connection establishment and
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	257 * maintenance when the remote end is on a network that is not known
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	258 * to us.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	259 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	260 int ip_nhops = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	261 static struct ip_srcrt {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	262 struct in_addr dst; /* final destination */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	263 char nop; /* one NOP to align */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	264 char srcopt[IPOPT_OFFSET + 1]; /* OPTVAL, OLEN and OFFSET */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	265 struct in_addr route[MAX_IPOPTLEN/sizeof(struct in_addr)];
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	266 } ip_srcrt;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	267
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	268 static void save_rte __P((u_char *, struct in_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	269 static int ip_weadvertise(u_int32_t);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	270
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	271 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	272 * IP initialization: fill in IP protocol switch table.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	273 * All protocols not implemented in kernel go to raw IP protocol handler.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	274 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	275 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	276 ip_init()
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	277 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	278 register struct protosw *pr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	279 register int i;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	280 const u_int16_t defbaddynamicports_tcp[] = DEFBADDYNAMICPORTS_TCP;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	281 const u_int16_t defbaddynamicports_udp[] = DEFBADDYNAMICPORTS_UDP;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	282
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	283 pr = pffindproto(PF_INET, IPPROTO_RAW, SOCK_RAW);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	284 if (pr == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	285 panic("ip_init");
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	286 for (i = 0; i < IPPROTO_MAX; i++)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	287 ip_protox[i] = pr - inetsw;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	288 for (pr = inetdomain.dom_protosw;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	289 pr < inetdomain.dom_protoswNPROTOSW; pr++)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	290 if (pr->pr_domain->dom_family == PF_INET &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	291 pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	292 ip_protox[pr->pr_protocol] = pr - inetsw;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	293 LIST_INIT(&ipq);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	294 ipintrq.ifq_maxlen = ipqmaxlen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	295 TAILQ_INIT(&in_ifaddr);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	296
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	297 /* Fill in list of ports not to allocate dynamically. */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	298 bzero((void *)&baddynamicports, sizeof(baddynamicports));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	299 for (i = 0; defbaddynamicports_tcp[i] != 0; i++)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	300 DP_SET(baddynamicports.tcp, defbaddynamicports_tcp[i]);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	301 for (i = 0; defbaddynamicports_udp[i] != 0; i++)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	302 DP_SET(baddynamicports.udp, defbaddynamicports_tcp[i]);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	303 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	304
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	305 struct sockaddr_in ipaddr = { sizeof(ipaddr), AF_INET };
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	306 struct route ipforward_rt;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	307
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	308 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	309 ipintr()
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	310 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	311 register struct mbuf *m;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	312 int s;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	313
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	314 if (needqueuedrain)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	315 m_reclaim();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	316
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	317 while (1) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	318 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	319 * Get next datagram off input queue and get IP header
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	320 * in first mbuf.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	321 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	322 s = splimp();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	323 IF_DEQUEUE(&ipintrq, m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	324 splx(s);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	325 if (m == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	326 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	327 #ifdef DIAGNOSTIC
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	328 if ((m->m_flags & M_PKTHDR) == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	329 panic("ipintr no HDR");
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	330 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	331 ipv4_input(m, 0, NULL, 0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	332 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	333 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	334
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	335 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	336 * Ip input routine. Checksum and byte swap header. If fragmented
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	337 * try to reassemble. Process options. Pass to next level.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	338 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	339 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	340 ipv4_input(struct mbuf *m, ...)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	341 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	342 register struct ip *ip;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	343 register struct ipq *fp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	344 struct in_ifaddr *ia;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	345 struct ipqent *ipqe;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	346 int hlen, mff;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	347 va_list ap;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	348 int extra;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	349
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	350 va_start(ap, m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	351 extra = va_arg(ap, int);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	352 va_end(ap);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	353
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	354 if (extra) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	355 struct mbuf *newpacket;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	356
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	357 if (!(newpacket = m_split(m, extra, M_NOWAIT))) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	358 m_freem(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	359 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	360 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	361
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	362 newpacket->m_flags \|= m->m_flags;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	363 m_freem(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	364 m = newpacket;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	365 extra = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	366 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	367
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	368 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	369 * If no IP addresses have been set yet but the interfaces
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	370 * are receiving, can't do anything with incoming packets yet.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	371 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	372 if (in_ifaddr.tqh_first == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	373 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	374 ipstat.ips_total++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	375 if (m->m_len < sizeof (struct ip) &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	376 (m = m_pullup(m, sizeof (struct ip))) == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	377 ipstat.ips_toosmall++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	378 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	379 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	380 ip = mtod(m, struct ip *);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	381 if (ip->ip_v != IPVERSION) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	382 ipstat.ips_badvers++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	383 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	384 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	385 hlen = ip->ip_hl << 2;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	386 if (hlen < sizeof(struct ip)) { /* minimum header length */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	387 ipstat.ips_badhlen++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	388 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	389 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	390 if (hlen > m->m_len) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	391 if ((m = m_pullup(m, hlen)) == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	392 ipstat.ips_badhlen++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	393 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	394 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	395 ip = mtod(m, struct ip *);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	396 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	397 if ((ip->ip_sum = in_cksum(m, hlen)) != 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	398 ipstat.ips_badsum++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	399 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	400 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	401
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	402 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	403 * Convert fields to host representation.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	404 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	405 NTOHS(ip->ip_len);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	406 if (ip->ip_len < hlen) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	407 ipstat.ips_badlen++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	408 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	409 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	410 NTOHS(ip->ip_id);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	411 NTOHS(ip->ip_off);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	412
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	413 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	414 * Check that the amount of data in the buffers
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	415 * is as at least much as the IP header would have us expect.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	416 * Trim mbufs if longer than we expect.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	417 * Drop packet if shorter than we expect.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	418 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	419 if (m->m_pkthdr.len < ip->ip_len) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	420 ipstat.ips_tooshort++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	421 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	422 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	423 if (m->m_pkthdr.len > ip->ip_len) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	424 if (m->m_len == m->m_pkthdr.len) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	425 m->m_len = ip->ip_len;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	426 m->m_pkthdr.len = ip->ip_len;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	427 } else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	428 m_adj(m, ip->ip_len - m->m_pkthdr.len);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	429 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	430
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	431 #if defined(IPFILTER) \|\| defined(IPFILTER_LKM)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	432 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	433 * Check if we want to allow this packet to be processed.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	434 * Consider it to be bad if not.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	435 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	436 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	437 struct mbuf *m0 = m;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	438 if (fr_checkp && (*fr_checkp)(ip, hlen, m->m_pkthdr.rcvif, 0, &m0))
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	439 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	440 ip = mtod(m = m0, struct ip *);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	441 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	442 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	443
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	444 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	445 * Process options and, if not destined for us,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	446 * ship it on. ip_dooptions returns 1 when an
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	447 * error was detected (causing an icmp message
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	448 * to be sent and the original packet to be freed).
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	449 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	450 ip_nhops = 0; /* for source routed packets */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	451 if (hlen > sizeof (struct ip) && ip_dooptions(m))
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	452 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	453
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	454 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	455 * Check our list of addresses, to see if the packet is for us.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	456 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	457 if ((ia = in_iawithaddr(ip->ip_dst, m)) != NULL &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	458 (ia->ia_ifp->if_flags & IFF_UP))
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	459 goto ours;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	460
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	461 if (IN_MULTICAST(ip->ip_dst.s_addr)) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	462 struct in_multi *inm;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	463 #ifdef MROUTING
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	464 extern struct socket *ip_mrouter;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	465
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	466 if (m->m_flags & M_EXT) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	467 if ((m = m_pullup(m, hlen)) == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	468 ipstat.ips_toosmall++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	469 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	470 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	471 ip = mtod(m, struct ip *);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	472 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	473
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	474 if (ip_mrouter) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	475 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	476 * If we are acting as a multicast router, all
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	477 * incoming multicast packets are passed to the
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	478 * kernel-level multicast forwarding function.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	479 * The packet is returned (relatively) intact; if
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	480 * ip_mforward() returns a non-zero value, the packet
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	481 * must be discarded, else it may be accepted below.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	482 *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	483 * (The IP ident field is put in the same byte order
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	484 * as expected when ip_mforward() is called from
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	485 * ip_output().)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	486 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	487 ip->ip_id = htons(ip->ip_id);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	488 if (ip_mforward(m, m->m_pkthdr.rcvif) != 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	489 ipstat.ips_cantforward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	490 m_freem(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	491 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	492 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	493 ip->ip_id = ntohs(ip->ip_id);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	494
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	495 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	496 * The process-level routing demon needs to receive
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	497 * all multicast IGMP packets, whether or not this
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	498 * host belongs to their destination groups.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	499 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	500 if (ip->ip_p == IPPROTO_IGMP)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	501 goto ours;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	502 ipstat.ips_forward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	503 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	504 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	505 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	506 * See if we belong to the destination multicast group on the
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	507 * arrival interface.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	508 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	509 IN_LOOKUP_MULTI(ip->ip_dst, m->m_pkthdr.rcvif, inm);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	510 if (inm == NULL) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	511 ipstat.ips_cantforward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	512 m_freem(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	513 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	514 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	515 goto ours;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	516 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	517 if (ip->ip_dst.s_addr == INADDR_BROADCAST \|\|
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	518 ip->ip_dst.s_addr == INADDR_ANY)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	519 goto ours;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	520
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	521 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	522 * Not for us; forward if possible and desirable.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	523 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	524 if (ipforwarding == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	525 ipstat.ips_cantforward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	526 m_freem(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	527 } else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	528 ip_forward(m, 0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	529 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	530
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	531 ours:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	532 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	533 * If offset or IP_MF are set, must reassemble.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	534 * Otherwise, nothing need be done.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	535 * (We could look in the reassembly queue to see
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	536 * if the packet was previously fragmented,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	537 * but it's not worth the time; just let them time out.)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	538 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	539 if (ip->ip_off &~ (IP_DF \| IP_RF)) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	540 if (m->m_flags & M_EXT) { /* XXX */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	541 if ((m = m_pullup(m, hlen)) == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	542 ipstat.ips_toosmall++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	543 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	544 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	545 ip = mtod(m, struct ip *);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	546 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	547
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	548 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	549 * Look for queue of fragments
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	550 * of this datagram.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	551 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	552 ipq_lock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	553 for (fp = ipq.lh_first; fp != NULL; fp = fp->ipq_q.le_next)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	554 if (ip->ip_id == fp->ipq_id &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	555 ip->ip_src.s_addr == fp->ipq_src.s_addr &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	556 ip->ip_dst.s_addr == fp->ipq_dst.s_addr &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	557 ip->ip_p == fp->ipq_p)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	558 goto found;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	559 fp = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	560 found:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	561
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	562 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	563 * Adjust ip_len to not reflect header,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	564 * set ipqe_mff if more fragments are expected,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	565 * convert offset of this to bytes.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	566 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	567 ip->ip_len -= hlen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	568 mff = (ip->ip_off & IP_MF) != 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	569 if (mff) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	570 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	571 * Make sure that fragments have a data length
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	572 * that's a non-zero multiple of 8 bytes.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	573 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	574 if (ip->ip_len == 0 \|\| (ip->ip_len & 0x7) != 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	575 ipstat.ips_badfrags++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	576 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	577 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	578 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	579 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	580 ip->ip_off <<= 3;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	581
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	582 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	583 * If datagram marked as having more fragments
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	584 * or if this is not the first fragment,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	585 * attempt reassembly; if it succeeds, proceed.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	586 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	587 if (mff \|\| ip->ip_off) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	588 ipstat.ips_fragments++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	589 if (ip_frags + 1 > ip_maxqueue) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	590 ip_flush();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	591 ipstat.ips_rcvmemdrop++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	592 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	593 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	594 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	595
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	596 MALLOC(ipqe, struct ipqent *, sizeof (struct ipqent),
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	597 M_IPQ, M_NOWAIT);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	598 if (ipqe == NULL) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	599 ipstat.ips_rcvmemdrop++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	600 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	601 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	602 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	603 ip_frags++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	604 ipqe->ipqe_mff = mff;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	605 ipqe->ipqe_ip = ip;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	606 ip = ip_reass(ipqe, fp);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	607 if (ip == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	608 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	609 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	610 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	611 ipstat.ips_reassembled++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	612 m = dtom(ip);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	613 hlen = ip->ip_hl << 2;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	614 } else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	615 if (fp)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	616 ip_freef(fp);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	617 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	618 } else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	619 ip->ip_len -= hlen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	620
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	621 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	622 * Switch out to protocol's input routine.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	623 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	624 ipstat.ips_delivered++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	625 (*inetsw[ip_protox[ip->ip_p]].pr_input)(m, hlen, NULL, 0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	626 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	627 bad:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	628 m_freem(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	629 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	630
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	631 struct in_ifaddr *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	632 in_iawithaddr(ina, m)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	633 struct in_addr ina;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	634 register struct mbuf *m;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	635 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	636 register struct in_ifaddr *ia;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	637
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	638 for (ia = in_ifaddr.tqh_first; ia; ia = ia->ia_list.tqe_next) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	639 if ((ina.s_addr == ia->ia_addr.sin_addr.s_addr) \|\|
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	640 ((ia->ia_ifp->if_flags & (IFF_LOOPBACK\|IFF_LINK1)) ==
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	641 (IFF_LOOPBACK\|IFF_LINK1) &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	642 ia->ia_subnet == (ina.s_addr & ia->ia_subnetmask)))
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	643 return ia;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	644 if (m && ((ip_directedbcast == 0) \|\| (ip_directedbcast &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	645 ia->ia_ifp == m->m_pkthdr.rcvif)) &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	646 (ia->ia_ifp->if_flags & IFF_BROADCAST)) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	647 if (ina.s_addr == ia->ia_broadaddr.sin_addr.s_addr \|\|
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	648 ina.s_addr == ia->ia_netbroadcast.s_addr \|\|
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	649 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	650 * Look for all-0's host part (old broadcast addr),
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	651 * either for subnet or net.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	652 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	653 ina.s_addr == ia->ia_subnet \|\|
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	654 ina.s_addr == ia->ia_net) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	655 /* Make sure M_BCAST is set */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	656 m->m_flags \|= M_BCAST;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	657 return ia;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	658 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	659 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	660 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	661
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	662 return NULL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	663 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	664
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	665 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	666 * Take incoming datagram fragment and try to
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	667 * reassemble it into whole datagram. If a chain for
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	668 * reassembly of this datagram already exists, then it
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	669 * is given as fp; otherwise have to make a chain.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	670 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	671 struct ip *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	672 ip_reass(ipqe, fp)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	673 register struct ipqent *ipqe;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	674 register struct ipq *fp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	675 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	676 register struct mbuf *m = dtom(ipqe->ipqe_ip);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	677 register struct ipqent nq, p, *q;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	678 struct ip *ip;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	679 struct mbuf *t;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	680 int hlen = ipqe->ipqe_ip->ip_hl << 2;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	681 int i, next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	682
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	683 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	684 * Presence of header sizes in mbufs
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	685 * would confuse code below.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	686 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	687 m->m_data += hlen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	688 m->m_len -= hlen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	689
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	690 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	691 * If first fragment to arrive, create a reassembly queue.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	692 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	693 if (fp == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	694 if ((t = m_get(M_DONTWAIT, MT_FTABLE)) == NULL)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	695 goto dropfrag;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	696 fp = mtod(t, struct ipq *);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	697 LIST_INSERT_HEAD(&ipq, fp, ipq_q);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	698 fp->ipq_ttl = IPFRAGTTL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	699 fp->ipq_p = ipqe->ipqe_ip->ip_p;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	700 fp->ipq_id = ipqe->ipqe_ip->ip_id;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	701 LIST_INIT(&fp->ipq_fragq);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	702 fp->ipq_src = ipqe->ipqe_ip->ip_src;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	703 fp->ipq_dst = ipqe->ipqe_ip->ip_dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	704 p = NULL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	705 goto insert;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	706 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	707
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	708 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	709 * Find a segment which begins after this one does.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	710 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	711 for (p = NULL, q = fp->ipq_fragq.lh_first; q != NULL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	712 p = q, q = q->ipqe_q.le_next)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	713 if (q->ipqe_ip->ip_off > ipqe->ipqe_ip->ip_off)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	714 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	715
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	716 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	717 * If there is a preceding segment, it may provide some of
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	718 * our data already. If so, drop the data from the incoming
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	719 * segment. If it provides all of our data, drop us.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	720 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	721 if (p != NULL) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	722 i = p->ipqe_ip->ip_off + p->ipqe_ip->ip_len -
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	723 ipqe->ipqe_ip->ip_off;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	724 if (i > 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	725 if (i >= ipqe->ipqe_ip->ip_len)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	726 goto dropfrag;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	727 m_adj(dtom(ipqe->ipqe_ip), i);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	728 ipqe->ipqe_ip->ip_off += i;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	729 ipqe->ipqe_ip->ip_len -= i;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	730 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	731 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	732
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	733 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	734 * While we overlap succeeding segments trim them or,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	735 * if they are completely covered, dequeue them.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	736 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	737 for (; q != NULL && ipqe->ipqe_ip->ip_off + ipqe->ipqe_ip->ip_len >
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	738 q->ipqe_ip->ip_off; q = nq) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	739 i = (ipqe->ipqe_ip->ip_off + ipqe->ipqe_ip->ip_len) -
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	740 q->ipqe_ip->ip_off;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	741 if (i < q->ipqe_ip->ip_len) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	742 q->ipqe_ip->ip_len -= i;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	743 q->ipqe_ip->ip_off += i;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	744 m_adj(dtom(q->ipqe_ip), i);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	745 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	746 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	747 nq = q->ipqe_q.le_next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	748 m_freem(dtom(q->ipqe_ip));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	749 LIST_REMOVE(q, ipqe_q);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	750 FREE(q, M_IPQ);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	751 ip_frags--;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	752 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	753
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	754 insert:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	755 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	756 * Stick new segment in its place;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	757 * check for complete reassembly.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	758 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	759 if (p == NULL) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	760 LIST_INSERT_HEAD(&fp->ipq_fragq, ipqe, ipqe_q);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	761 } else {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	762 LIST_INSERT_AFTER(p, ipqe, ipqe_q);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	763 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	764 next = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	765 for (p = NULL, q = fp->ipq_fragq.lh_first; q != NULL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	766 p = q, q = q->ipqe_q.le_next) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	767 if (q->ipqe_ip->ip_off != next)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	768 return (0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	769 next += q->ipqe_ip->ip_len;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	770 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	771 if (p->ipqe_mff)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	772 return (0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	773
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	774 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	775 * Reassembly is complete. Check for a bogus message size and
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	776 * concatenate fragments.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	777 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	778 q = fp->ipq_fragq.lh_first;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	779 ip = q->ipqe_ip;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	780 if ((next + (ip->ip_hl << 2)) > IP_MAXPACKET) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	781 ipstat.ips_toolong++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	782 ip_freef(fp);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	783 return (0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	784 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	785 m = dtom(q->ipqe_ip);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	786 t = m->m_next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	787 m->m_next = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	788 m_cat(m, t);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	789 nq = q->ipqe_q.le_next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	790 FREE(q, M_IPQ);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	791 ip_frags--;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	792 for (q = nq; q != NULL; q = nq) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	793 t = dtom(q->ipqe_ip);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	794 nq = q->ipqe_q.le_next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	795 FREE(q, M_IPQ);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	796 ip_frags--;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	797 m_cat(m, t);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	798 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	799
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	800 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	801 * Create header for new ip packet by
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	802 * modifying header of first packet;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	803 * dequeue and discard fragment reassembly header.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	804 * Make header visible.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	805 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	806 ip->ip_len = next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	807 ip->ip_ttl = 0; /* xxx */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	808 ip->ip_sum = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	809 ip->ip_src = fp->ipq_src;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	810 ip->ip_dst = fp->ipq_dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	811 LIST_REMOVE(fp, ipq_q);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	812 (void) m_free(dtom(fp));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	813 m->m_len += (ip->ip_hl << 2);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	814 m->m_data -= (ip->ip_hl << 2);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	815 /* some debugging cruft by sklower, below, will go away soon */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	816 if (m->m_flags & M_PKTHDR) { /* XXX this should be done elsewhere */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	817 register int plen = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	818 for (t = m; m; m = m->m_next)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	819 plen += m->m_len;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	820 t->m_pkthdr.len = plen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	821 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	822 return (ip);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	823
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	824 dropfrag:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	825 ipstat.ips_fragdropped++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	826 m_freem(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	827 FREE(ipqe, M_IPQ);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	828 ip_frags--;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	829 return (0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	830 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	831
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	832 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	833 * Free a fragment reassembly header and all
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	834 * associated datagrams.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	835 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	836 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	837 ip_freef(fp)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	838 struct ipq *fp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	839 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	840 register struct ipqent q, p;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	841
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	842 for (q = fp->ipq_fragq.lh_first; q != NULL; q = p) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	843 p = q->ipqe_q.le_next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	844 m_freem(dtom(q->ipqe_ip));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	845 LIST_REMOVE(q, ipqe_q);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	846 FREE(q, M_IPQ);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	847 ip_frags--;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	848 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	849 LIST_REMOVE(fp, ipq_q);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	850 (void) m_free(dtom(fp));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	851 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	852
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	853 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	854 * IP timer processing;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	855 * if a timer expires on a reassembly
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	856 * queue, discard it.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	857 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	858 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	859 ip_slowtimo()
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	860 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	861 register struct ipq fp, nfp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	862 int s = splsoftnet();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	863
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	864 ipq_lock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	865 for (fp = ipq.lh_first; fp != NULL; fp = nfp) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	866 nfp = fp->ipq_q.le_next;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	867 if (--fp->ipq_ttl == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	868 ipstat.ips_fragtimeout++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	869 ip_freef(fp);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	870 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	871 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	872 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	873 splx(s);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	874 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	875
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	876 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	877 * Drain off all datagram fragments.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	878 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	879 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	880 ip_drain()
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	881 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	882
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	883 if (ipq_lock_try() == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	884 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	885 while (ipq.lh_first != NULL) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	886 ipstat.ips_fragdropped++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	887 ip_freef(ipq.lh_first);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	888 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	889 ipq_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	890 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	891
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	892 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	893 * Flush a bunch of datagram fragments, till we are down to 75%.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	894 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	895 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	896 ip_flush()
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	897 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	898 int max = 50;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	899
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	900 /* ipq already locked */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	901 while (ipq.lh_first != NULL && ip_frags > ip_maxqueue * 3 / 4 && --max) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	902 ipstat.ips_fragdropped++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	903 ip_freef(ipq.lh_first);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	904 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	905 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	906
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	907 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	908 * Do option processing on a datagram,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	909 * possibly discarding it if bad options are encountered,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	910 * or forwarding it if source-routed.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	911 * Returns 1 if packet has been forwarded/freed,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	912 * 0 if the packet should be processed further.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	913 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	914 int
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	915 ip_dooptions(m)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	916 struct mbuf *m;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	917 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	918 register struct ip ip = mtod(m, struct ip );
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	919 register u_char *cp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	920 register struct ip_timestamp *ipt;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	921 register struct in_ifaddr *ia;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	922 int opt, optlen, cnt, off, code, type = ICMP_PARAMPROB, forward = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	923 struct in_addr *sin, dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	924 n_time ntime;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	925
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	926 dst = ip->ip_dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	927 cp = (u_char *)(ip + 1);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	928 cnt = (ip->ip_hl << 2) - sizeof (struct ip);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	929 for (; cnt > 0; cnt -= optlen, cp += optlen) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	930 opt = cp[IPOPT_OPTVAL];
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	931 if (opt == IPOPT_EOL)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	932 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	933 if (opt == IPOPT_NOP)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	934 optlen = 1;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	935 else {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	936 optlen = cp[IPOPT_OLEN];
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	937 if (optlen <= 0 \|\| optlen > cnt) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	938 code = &cp[IPOPT_OLEN] - (u_char *)ip;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	939 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	940 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	941 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	942 switch (opt) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	943
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	944 default:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	945 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	946
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	947 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	948 * Source routing with record.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	949 * Find interface with current destination address.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	950 * If none on this machine then drop if strictly routed,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	951 * or do nothing if loosely routed.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	952 * Record interface address and bring up next address
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	953 * component. If strictly routed make sure next
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	954 * address is on directly accessible net.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	955 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	956 case IPOPT_LSRR:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	957 case IPOPT_SSRR:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	958 if (!ip_dosourceroute) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	959 #ifndef __ECOS
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	960 char buf[4*sizeof "123"];
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	961
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	962 strcpy(buf, inet_ntoa(ip->ip_dst));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	963 log(LOG_WARNING,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	964 "attempted source route from %s to %s\n",
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	965 inet_ntoa(ip->ip_src), buf);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	966 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	967 type = ICMP_UNREACH;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	968 code = ICMP_UNREACH_SRCFAIL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	969 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	970 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	971 if ((off = cp[IPOPT_OFFSET]) < IPOPT_MINOFF) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	972 code = &cp[IPOPT_OFFSET] - (u_char *)ip;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	973 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	974 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	975 ipaddr.sin_addr = ip->ip_dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	976 ia = ifatoia(ifa_ifwithaddr(sintosa(&ipaddr)));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	977 if (ia == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	978 if (opt == IPOPT_SSRR) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	979 type = ICMP_UNREACH;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	980 code = ICMP_UNREACH_SRCFAIL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	981 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	982 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	983 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	984 * Loose routing, and not at next destination
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	985 * yet; nothing to do except forward.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	986 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	987 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	988 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	989 off--; /* 0 origin */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	990 if (off > optlen - sizeof(struct in_addr)) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	991 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	992 * End of source route. Should be for us.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	993 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	994 save_rte(cp, ip->ip_src);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	995 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	996 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	997
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	998 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	999 * locate outgoing interface
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1000 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1001 bcopy((caddr_t)(cp + off), (caddr_t)&ipaddr.sin_addr,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1002 sizeof(ipaddr.sin_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1003 if (opt == IPOPT_SSRR) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1004 #define INA struct in_ifaddr *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1005 #define SA struct sockaddr *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1006 if ((ia = (INA)ifa_ifwithdstaddr((SA)&ipaddr)) == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1007 ia = (INA)ifa_ifwithnet((SA)&ipaddr);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1008 } else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1009 ia = ip_rtaddr(ipaddr.sin_addr);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1010 if (ia == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1011 type = ICMP_UNREACH;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1012 code = ICMP_UNREACH_SRCFAIL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1013 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1014 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1015 ip->ip_dst = ipaddr.sin_addr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1016 bcopy((caddr_t)&ia->ia_addr.sin_addr,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1017 (caddr_t)(cp + off), sizeof(struct in_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1018 cp[IPOPT_OFFSET] += sizeof(struct in_addr);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1019 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1020 * Let ip_intr's mcast routing check handle mcast pkts
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1021 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1022 forward = !IN_MULTICAST(ip->ip_dst.s_addr);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1023 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1024
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1025 case IPOPT_RR:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1026 if ((off = cp[IPOPT_OFFSET]) < IPOPT_MINOFF) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1027 code = &cp[IPOPT_OFFSET] - (u_char *)ip;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1028 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1029 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1030
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1031 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1032 * If no space remains, ignore.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1033 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1034 off--; /* 0 origin */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1035 if (off > optlen - sizeof(struct in_addr))
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1036 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1037 bcopy((caddr_t)(&ip->ip_dst), (caddr_t)&ipaddr.sin_addr,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1038 sizeof(ipaddr.sin_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1039 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1040 * locate outgoing interface; if we're the destination,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1041 * use the incoming interface (should be same).
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1042 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1043 if ((ia = (INA)ifa_ifwithaddr((SA)&ipaddr)) == 0 &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1044 (ia = ip_rtaddr(ipaddr.sin_addr)) == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1045 type = ICMP_UNREACH;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1046 code = ICMP_UNREACH_HOST;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1047 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1048 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1049 bcopy((caddr_t)&ia->ia_addr.sin_addr,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1050 (caddr_t)(cp + off), sizeof(struct in_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1051 cp[IPOPT_OFFSET] += sizeof(struct in_addr);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1052 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1053
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1054 case IPOPT_TS:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1055 code = cp - (u_char *)ip;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1056 ipt = (struct ip_timestamp *)cp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1057 if (ipt->ipt_ptr < 5 \|\| ipt->ipt_len < 5)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1058 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1059 if (ipt->ipt_ptr - 1 + sizeof(n_time) > ipt->ipt_len) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1060 if (++ipt->ipt_oflw == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1061 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1062 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1063 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1064 sin = (struct in_addr *)(cp + ipt->ipt_ptr - 1);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1065 switch (ipt->ipt_flg) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1066
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1067 case IPOPT_TS_TSONLY:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1068 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1069
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1070 case IPOPT_TS_TSANDADDR:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1071 if (ipt->ipt_ptr - 1 + sizeof(n_time) +
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1072 sizeof(struct in_addr) > ipt->ipt_len)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1073 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1074 ipaddr.sin_addr = dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1075 ia = (INA)ifaof_ifpforaddr((SA)&ipaddr,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1076 m->m_pkthdr.rcvif);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1077 if (ia == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1078 continue;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1079 bcopy((caddr_t)&ia->ia_addr.sin_addr,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1080 (caddr_t)sin, sizeof(struct in_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1081 ipt->ipt_ptr += sizeof(struct in_addr);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1082 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1083
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1084 case IPOPT_TS_PRESPEC:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1085 if (ipt->ipt_ptr - 1 + sizeof(n_time) +
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1086 sizeof(struct in_addr) > ipt->ipt_len)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1087 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1088 bcopy((caddr_t)sin, (caddr_t)&ipaddr.sin_addr,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1089 sizeof(struct in_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1090 if (ifa_ifwithaddr((SA)&ipaddr) == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1091 continue;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1092 ipt->ipt_ptr += sizeof(struct in_addr);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1093 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1094
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1095 default:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1096 goto bad;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1097 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1098 ntime = iptime();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1099 bcopy((caddr_t)&ntime, (caddr_t)cp + ipt->ipt_ptr - 1,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1100 sizeof(n_time));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1101 ipt->ipt_ptr += sizeof(n_time);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1102 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1103 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1104 if (forward && ipforwarding) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1105 ip_forward(m, 1);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1106 return (1);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1107 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1108 return (0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1109 bad:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1110 ip->ip_len -= ip->ip_hl << 2; /* XXX icmp_error adds in hdr length */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1111 HTONS(ip->ip_len); /* XXX because ip_input changed these three */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1112 HTONS(ip->ip_id);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1113 HTONS(ip->ip_off);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1114 icmp_error(m, type, code, 0, 0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1115 ipstat.ips_badoptions++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1116 return (1);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1117 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1118
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1119 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1120 * Given address of next destination (final or next hop),
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1121 * return internet address info of interface to be used to get there.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1122 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1123 struct in_ifaddr *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1124 ip_rtaddr(dst)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1125 struct in_addr dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1126 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1127 register struct sockaddr_in *sin;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1128
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1129 sin = satosin(&ipforward_rt.ro_dst);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1130
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1131 if (ipforward_rt.ro_rt == 0 \|\| dst.s_addr != sin->sin_addr.s_addr) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1132 if (ipforward_rt.ro_rt) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1133 RTFREE(ipforward_rt.ro_rt);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1134 ipforward_rt.ro_rt = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1135 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1136 sin->sin_family = AF_INET;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1137 sin->sin_len = sizeof(*sin);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1138 sin->sin_addr = dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1139
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1140 rtalloc(&ipforward_rt);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1141 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1142 if (ipforward_rt.ro_rt == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1143 return ((struct in_ifaddr *)0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1144 return (ifatoia(ipforward_rt.ro_rt->rt_ifa));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1145 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1146
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1147 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1148 * Save incoming source route for use in replies,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1149 * to be picked up later by ip_srcroute if the receiver is interested.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1150 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1151 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1152 save_rte(option, dst)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1153 u_char *option;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1154 struct in_addr dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1155 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1156 unsigned olen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1157
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1158 olen = option[IPOPT_OLEN];
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1159 #ifdef DIAGNOSTIC
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1160 if (ipprintfs)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1161 printf("save_rte: olen %d\n", olen);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1162 #endif /* 0 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1163 if (olen > sizeof(ip_srcrt) - (1 + sizeof(dst)))
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1164 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1165 bcopy((caddr_t)option, (caddr_t)ip_srcrt.srcopt, olen);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1166 ip_nhops = (olen - IPOPT_OFFSET - 1) / sizeof(struct in_addr);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1167 ip_srcrt.dst = dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1168 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1169
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1170 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1171 * Check whether we do proxy ARP for this address and we point to ourselves.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1172 * Code shamelessly copied from arplookup().
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1173 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1174 static int
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1175 ip_weadvertise(addr)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1176 u_int32_t addr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1177 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1178 register struct rtentry *rt;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1179 register struct ifnet *ifp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1180 register struct ifaddr *ifa;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1181 struct sockaddr_inarp sin;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1182
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1183 sin.sin_len = sizeof(sin);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1184 sin.sin_family = AF_INET;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1185 sin.sin_addr.s_addr = addr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1186 sin.sin_other = SIN_PROXY;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1187 rt = rtalloc1(sintosa(&sin), 0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1188 if (rt == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1189 return 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1190
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1191 RTFREE(rt);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1192
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1193 if ((rt->rt_flags & RTF_GATEWAY) \|\| (rt->rt_flags & RTF_LLINFO) == 0 \|\|
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1194 rt->rt_gateway->sa_family != AF_LINK)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1195 return 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1196
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1197 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1198 for (ifa = ifp->if_addrlist.tqh_first; ifa != 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1199 ifa = ifa->ifa_list.tqe_next) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1200 if (ifa->ifa_addr->sa_family != rt->rt_gateway->sa_family)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1201 continue;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1202
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1203 if (!bcmp(LLADDR((struct sockaddr_dl *)ifa->ifa_addr),
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1204 LLADDR((struct sockaddr_dl *)rt->rt_gateway),
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1205 ETHER_ADDR_LEN))
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1206 return 1;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1207 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1208
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1209 return 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1210 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1211
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1212 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1213 * Retrieve incoming source route for use in replies,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1214 * in the same form used by setsockopt.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1215 * The first hop is placed before the options, will be removed later.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1216 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1217 struct mbuf *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1218 ip_srcroute()
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1219 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1220 register struct in_addr p, q;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1221 register struct mbuf *m;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1222
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1223 if (ip_nhops == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1224 return ((struct mbuf *)0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1225 m = m_get(M_DONTWAIT, MT_SOOPTS);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1226 if (m == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1227 return ((struct mbuf *)0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1228
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1229 #define OPTSIZ (sizeof(ip_srcrt.nop) + sizeof(ip_srcrt.srcopt))
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1230
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1231 /* length is (nhops+1)sizeof(addr) + sizeof(nop + srcrt header) /
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1232 m->m_len = ip_nhops * sizeof(struct in_addr) + sizeof(struct in_addr) +
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1233 OPTSIZ;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1234 #ifdef DIAGNOSTIC
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1235 if (ipprintfs)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1236 printf("ip_srcroute: nhops %d mlen %d", ip_nhops, m->m_len);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1237 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1238
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1239 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1240 * First save first hop for return route
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1241 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1242 p = &ip_srcrt.route[ip_nhops - 1];
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1243 (mtod(m, struct in_addr )) = *p--;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1244 #ifdef DIAGNOSTIC
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1245 if (ipprintfs)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1246 printf(" hops %x", ntohl(mtod(m, struct in_addr *)->s_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1247 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1248
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1249 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1250 * Copy option fields and padding (nop) to mbuf.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1251 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1252 ip_srcrt.nop = IPOPT_NOP;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1253 ip_srcrt.srcopt[IPOPT_OFFSET] = IPOPT_MINOFF;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1254 bcopy((caddr_t)&ip_srcrt.nop,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1255 mtod(m, caddr_t) + sizeof(struct in_addr), OPTSIZ);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1256 q = (struct in_addr *)(mtod(m, caddr_t) +
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1257 sizeof(struct in_addr) + OPTSIZ);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1258 #undef OPTSIZ
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1259 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1260 * Record return path as an IP source route,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1261 * reversing the path (pointers are now aligned).
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1262 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1263 while (p >= ip_srcrt.route) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1264 #ifdef DIAGNOSTIC
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1265 if (ipprintfs)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1266 printf(" %x", ntohl(q->s_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1267 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1268 q++ = p--;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1269 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1270 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1271 * Last hop goes to final destination.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1272 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1273 *q = ip_srcrt.dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1274 #ifdef DIAGNOSTIC
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1275 if (ipprintfs)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1276 printf(" %x\n", ntohl(q->s_addr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1277 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1278 return (m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1279 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1280
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1281 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1282 * Strip out IP options, at higher
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1283 * level protocol in the kernel.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1284 * Second argument is buffer to which options
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1285 * will be moved, and return value is their length.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1286 * XXX should be deleted; last arg currently ignored.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1287 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1288 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1289 ip_stripoptions(m, mopt)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1290 register struct mbuf *m;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1291 struct mbuf *mopt;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1292 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1293 register int i;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1294 struct ip ip = mtod(m, struct ip );
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1295 register caddr_t opts;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1296 int olen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1297
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1298 olen = (ip->ip_hl<<2) - sizeof (struct ip);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1299 opts = (caddr_t)(ip + 1);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1300 i = m->m_len - (sizeof (struct ip) + olen);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1301 bcopy(opts + olen, opts, (unsigned)i);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1302 m->m_len -= olen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1303 if (m->m_flags & M_PKTHDR)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1304 m->m_pkthdr.len -= olen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1305 ip->ip_hl = sizeof(struct ip) >> 2;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1306 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1307
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1308 int inetctlerrmap[PRC_NCMDS] = {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1309 0, 0, 0, 0,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1310 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1311 EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1312 EMSGSIZE, EHOSTUNREACH, 0, 0,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1313 0, 0, 0, 0,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1314 ENOPROTOOPT
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1315 };
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1316
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1317 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1318 * Forward a packet. If some error occurs return the sender
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1319 * an icmp packet. Note we can't always generate a meaningful
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1320 * icmp message because icmp doesn't have a large enough repertoire
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1321 * of codes and types.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1322 *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1323 * If not forwarding, just drop the packet. This could be confusing
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1324 * if ipforwarding was zero but some routing protocol was advancing
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1325 * us as a gateway to somewhere. However, we must let the routing
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1326 * protocol deal with that.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1327 *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1328 * The srcrt parameter indicates whether the packet is being forwarded
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1329 * via a source route.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1330 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1331 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1332 ip_forward(m, srcrt)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1333 struct mbuf *m;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1334 int srcrt;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1335 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1336 register struct ip ip = mtod(m, struct ip );
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1337 register struct sockaddr_in *sin;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1338 register struct rtentry *rt;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1339 int error, type = 0, code = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1340 struct mbuf *mcopy;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1341 n_long dest;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1342 struct ifnet *destifp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1343 #if 0 /KAME IPSEC/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1344 struct ifnet dummyifp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1345 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1346
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1347 dest = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1348 #ifdef DIAGNOSTIC
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1349 if (ipprintfs)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1350 printf("forward: src %x dst %x ttl %x\n", ip->ip_src.s_addr,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1351 ip->ip_dst.s_addr, ip->ip_ttl);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1352 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1353 if (m->m_flags & M_BCAST \|\| in_canforward(ip->ip_dst) == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1354 ipstat.ips_cantforward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1355 m_freem(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1356 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1357 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1358 HTONS(ip->ip_id);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1359 if (ip->ip_ttl <= IPTTLDEC) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1360 icmp_error(m, ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS, dest, 0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1361 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1362 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1363 ip->ip_ttl -= IPTTLDEC;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1364
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1365 sin = satosin(&ipforward_rt.ro_dst);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1366 if ((rt = ipforward_rt.ro_rt) == 0 \|\|
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1367 ip->ip_dst.s_addr != sin->sin_addr.s_addr) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1368 if (ipforward_rt.ro_rt) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1369 RTFREE(ipforward_rt.ro_rt);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1370 ipforward_rt.ro_rt = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1371 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1372 sin->sin_family = AF_INET;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1373 sin->sin_len = sizeof(*sin);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1374 sin->sin_addr = ip->ip_dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1375
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1376 rtalloc(&ipforward_rt);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1377 if (ipforward_rt.ro_rt == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1378 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_HOST, dest, 0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1379 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1380 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1381 rt = ipforward_rt.ro_rt;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1382 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1383
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1384 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1385 * Save at most 68 bytes of the packet in case
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1386 * we need to generate an ICMP message to the src.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1387 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1388 mcopy = m_copy(m, 0, imin((int)ip->ip_len, 68));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1389
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1390 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1391 * If forwarding packet using same interface that it came in on,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1392 * perhaps should send a redirect to sender to shortcut a hop.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1393 * Only send redirect if source is sending directly to us,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1394 * and if packet was not source routed (or has any options).
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1395 * Also, don't send redirect if forwarding using a default route
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1396 * or a route modified by a redirect.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1397 * Don't send redirect if we advertise destination's arp address
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1398 * as ours (proxy arp).
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1399 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1400 if (rt->rt_ifp == m->m_pkthdr.rcvif &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1401 (rt->rt_flags & (RTF_DYNAMIC\|RTF_MODIFIED)) == 0 &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1402 satosin(rt_key(rt))->sin_addr.s_addr != 0 &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1403 ipsendredirects && !srcrt &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1404 !ip_weadvertise(satosin(rt_key(rt))->sin_addr.s_addr)) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1405 if (rt->rt_ifa &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1406 (ip->ip_src.s_addr & ifatoia(rt->rt_ifa)->ia_subnetmask) ==
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1407 ifatoia(rt->rt_ifa)->ia_subnet) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1408 if (rt->rt_flags & RTF_GATEWAY)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1409 dest = satosin(rt->rt_gateway)->sin_addr.s_addr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1410 else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1411 dest = ip->ip_dst.s_addr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1412 /* Router requirements says to only send host redirects */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1413 type = ICMP_REDIRECT;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1414 code = ICMP_REDIRECT_HOST;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1415 #ifdef DIAGNOSTIC
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1416 if (ipprintfs)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1417 printf("redirect (%d) to %x\n", code, (u_int32_t)dest);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1418 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1419 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1420 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1421
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1422 #if 0 /KAME IPSEC/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1423 m->m_pkthdr.rcvif = NULL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1424 #endif /IPSEC/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1425 error = ip_output(m, (struct mbuf *)0, &ipforward_rt,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1426 (IP_FORWARDING \| (ip_directedbcast ? IP_ALLOWBROADCAST : 0)),
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1427 0, NULL, NULL);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1428 if (error)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1429 ipstat.ips_cantforward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1430 else {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1431 ipstat.ips_forward++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1432 if (type)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1433 ipstat.ips_redirectsent++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1434 else {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1435 if (mcopy)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1436 m_freem(mcopy);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1437 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1438 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1439 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1440 if (mcopy == NULL)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1441 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1442 destifp = NULL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1443
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1444 switch (error) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1445
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1446 case 0: /* forwarded, but need redirect */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1447 /* type, code set above */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1448 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1449
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1450 case ENETUNREACH: /* shouldn't happen, checked above */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1451 case EHOSTUNREACH:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1452 case ENETDOWN:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1453 case EHOSTDOWN:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1454 default:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1455 type = ICMP_UNREACH;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1456 code = ICMP_UNREACH_HOST;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1457 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1458
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1459 case EMSGSIZE:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1460 type = ICMP_UNREACH;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1461 code = ICMP_UNREACH_NEEDFRAG;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1462 #if 1 /KAME IPSEC/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1463 if (ipforward_rt.ro_rt)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1464 destifp = ipforward_rt.ro_rt->rt_ifp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1465 #else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1466 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1467 * If the packet is routed over IPsec tunnel, tell the
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1468 * originator the tunnel MTU.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1469 * tunnel MTU = if MTU - sizeof(IP) - ESP/AH hdrsiz
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1470 * XXX quickhack!!!
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1471 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1472 if (ipforward_rt.ro_rt) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1473 struct secpolicy *sp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1474 int ipsecerror;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1475 int ipsechdr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1476 struct route *ro;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1477
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1478 sp = ipsec4_getpolicybyaddr(mcopy,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1479 IP_FORWARDING,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1480 &ipsecerror);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1481
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1482 if (sp == NULL)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1483 destifp = ipforward_rt.ro_rt->rt_ifp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1484 else {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1485 /* count IPsec header size */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1486 ipsechdr = ipsec4_hdrsiz(mcopy, NULL);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1487
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1488 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1489 * find the correct route for outer IPv4
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1490 * header, compute tunnel MTU.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1491 *
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1492 * XXX BUG ALERT
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1493 * The "dummyifp" code relies upon the fact
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1494 * that icmp_error() touches only ifp->if_mtu.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1495 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1496 /XXX/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1497 destifp = NULL;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1498 if (sp->req != NULL
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1499 && sp->req->sa != NULL) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1500 ro = &sp->req->sa->saidx->sa_route;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1501 if (ro->ro_rt && ro->ro_rt->rt_ifp) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1502 dummyifp.if_mtu =
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1503 ro->ro_rt->rt_ifp->if_mtu;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1504 dummyifp.if_mtu -= ipsechdr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1505 destifp = &dummyifp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1506 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1507 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1508
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1509 key_freesp(sp);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1510 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1511 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1512 #endif /IPSEC/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1513 ipstat.ips_cantfrag++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1514 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1515
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1516 case ENOBUFS:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1517 type = ICMP_SOURCEQUENCH;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1518 code = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1519 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1520 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1521
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1522 icmp_error(mcopy, type, code, dest, destifp);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1523 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1524
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1525 #ifdef CYGPKG_NET_SYSCTL
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1526 int
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1527 ip_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1528 int *name;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1529 u_int namelen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1530 void *oldp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1531 size_t *oldlenp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1532 void *newp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1533 size_t newlen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1534 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1535 /* All sysctl names at this level are terminal. */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1536 if (namelen != 1)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1537 return (ENOTDIR);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1538
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1539 switch (name[0]) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1540 case IPCTL_FORWARDING:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1541 return (sysctl_int(oldp, oldlenp, newp, newlen, &ipforwarding));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1542 case IPCTL_SENDREDIRECTS:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1543 return (sysctl_int(oldp, oldlenp, newp, newlen,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1544 &ipsendredirects));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1545 case IPCTL_DEFTTL:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1546 return (sysctl_int(oldp, oldlenp, newp, newlen, &ip_defttl));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1547 #ifdef notyet
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1548 case IPCTL_DEFMTU:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1549 return (sysctl_int(oldp, oldlenp, newp, newlen, &ip_mtu));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1550 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1551 case IPCTL_SOURCEROUTE:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1552 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1553 * Don't allow this to change in a secure environment.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1554 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1555 if (newp && securelevel > 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1556 return (EPERM);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1557 return (sysctl_int(oldp, oldlenp, newp, newlen,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1558 &ip_dosourceroute));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1559 case IPCTL_DIRECTEDBCAST:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1560 return (sysctl_int(oldp, oldlenp, newp, newlen,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1561 &ip_directedbcast));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1562 case IPCTL_IPPORT_FIRSTAUTO:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1563 return (sysctl_int(oldp, oldlenp, newp, newlen,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1564 &ipport_firstauto));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1565 case IPCTL_IPPORT_LASTAUTO:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1566 return (sysctl_int(oldp, oldlenp, newp, newlen,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1567 &ipport_lastauto));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1568 case IPCTL_IPPORT_HIFIRSTAUTO:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1569 return (sysctl_int(oldp, oldlenp, newp, newlen,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1570 &ipport_hifirstauto));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1571 case IPCTL_IPPORT_HILASTAUTO:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1572 return (sysctl_int(oldp, oldlenp, newp, newlen,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1573 &ipport_hilastauto));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1574 case IPCTL_IPPORT_MAXQUEUE:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1575 return (sysctl_int(oldp, oldlenp, newp, newlen,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1576 &ip_maxqueue));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1577 case IPCTL_ENCDEBUG:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1578 return (sysctl_int(oldp, oldlenp, newp, newlen, &encdebug));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1579 default:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1580 return (EOPNOTSUPP);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1581 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1582 /* NOTREACHED */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1583 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST jlarmour parents: diff changeset	1584 #endif // CYGPKG_NET_SYSCTL

Mercurial > ecos

annotate packages/net/tcpip/current/src/sys/netinet/ip_input.c @ 115:6ed91473a1cd ecos-sw-2000-08-21