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annotate packages/net/tcpip/current/src/sys/netinet/ip_icmp.c @ 208:e0c0827131d1 ecos

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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
parents ced4577552cd
children 74dbf4c3f2e1
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1 //==========================================================================
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2 //
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3 // sys/netinet/ip_icmp.c
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4 //
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5 //
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6 //
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7 //==========================================================================
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8 //####BSDCOPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 //
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12 // Portions of this software may have been derived from OpenBSD or other sources,
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13 // and are covered by the appropriate copyright disclaimers included herein.
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14 //
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15 // -------------------------------------------
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16 //
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17 //####BSDCOPYRIGHTEND####
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18 //==========================================================================
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19 //#####DESCRIPTIONBEGIN####
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20 //
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21 // Author(s): gthomas
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22 // Contributors: gthomas
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23 // Date: 2000-01-10
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24 // Purpose:
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25 // Description:
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26 //
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27 //
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28 //####DESCRIPTIONEND####
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29 //
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30 //==========================================================================
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31
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32
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33 /* $OpenBSD: ip_icmp.c,v 1.19 1999/12/08 06:50:19 itojun Exp $ */
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34 /* $NetBSD: ip_icmp.c,v 1.19 1996/02/13 23:42:22 christos Exp $ */
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35
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36 /*
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37 * Copyright (c) 1982, 1986, 1988, 1993
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38 * The Regents of the University of California. All rights reserved.
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39 *
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40 * Redistribution and use in source and binary forms, with or without
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41 * modification, are permitted provided that the following conditions
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42 * are met:
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43 * 1. Redistributions of source code must retain the above copyright
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44 * notice, this list of conditions and the following disclaimer.
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45 * 2. Redistributions in binary form must reproduce the above copyright
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46 * notice, this list of conditions and the following disclaimer in the
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47 * documentation and/or other materials provided with the distribution.
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48 * 3. All advertising materials mentioning features or use of this software
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49 * must display the following acknowledgement:
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50 * This product includes software developed by the University of
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51 * California, Berkeley and its contributors.
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52 * 4. Neither the name of the University nor the names of its contributors
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53 * may be used to endorse or promote products derived from this software
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54 * without specific prior written permission.
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55 *
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56 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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57 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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58 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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59 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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60 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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61 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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62 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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63 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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64 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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65 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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66 * SUCH DAMAGE.
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67 *
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68 * @(#)ip_icmp.c 8.2 (Berkeley) 1/4/94
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69 */
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70
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71 /*
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72 %%% portions-copyright-nrl-95
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73 Portions of this software are Copyright 1995-1998 by Randall Atkinson,
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74 Ronald Lee, Daniel McDonald, Bao Phan, and Chris Winters. All Rights
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75 Reserved. All rights under this copyright have been assigned to the US
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76 Naval Research Laboratory (NRL). The NRL Copyright Notice and License
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77 Agreement Version 1.1 (January 17, 1995) applies to these portions of the
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78 software.
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79 You should have received a copy of the license with this software. If you
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80 didn't get a copy, you may request one from <license@ipv6.nrl.navy.mil>.
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81 */
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82
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83 #include <sys/param.h>
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84 #ifndef __ECOS
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85 #include <sys/systm.h>
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86 #endif
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87 #include <sys/malloc.h>
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88 #include <sys/mbuf.h>
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89 #include <sys/protosw.h>
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90 #include <sys/socket.h>
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91 #include <sys/time.h>
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92 #include <sys/kernel.h>
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93 #ifndef __ECOS
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94 #include <sys/proc.h>
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95
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96 #include <vm/vm.h>
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97 #include <sys/sysctl.h>
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98 #endif
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99
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100 #include <net/if.h>
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101 #include <net/route.h>
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102
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103 #include <netinet/in.h>
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104 #include <netinet/in_systm.h>
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105 #include <netinet/in_var.h>
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106 #include <netinet/ip.h>
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107 #include <netinet/ip_icmp.h>
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108 #include <netinet/ip_var.h>
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109 #include <netinet/icmp_var.h>
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110
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111 #if 0 /*KAME IPSEC*/
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112 #include <netinet6/ipsec.h>
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113 #include <netkey/key.h>
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114 #include <netkey/key_debug.h>
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115 #endif
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116
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117 #include <machine/stdarg.h>
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118
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119 /*
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120 * ICMP routines: error generation, receive packet processing, and
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121 * routines to turnaround packets back to the originator, and
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122 * host table maintenance routines.
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123 */
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124
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125 int icmpmaskrepl = 0;
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126 int icmpbmcastecho = 0;
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127 #ifdef ICMPPRINTFS
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128 int icmpprintfs = 0;
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129 #endif
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130
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131 #if 0
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132 static int ip_next_mtu __P((int, int));
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133 #else
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134 /*static*/ int ip_next_mtu __P((int, int));
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135 #endif
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136
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137 extern struct protosw inetsw[];
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138
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139 /*
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140 * Generate an error packet of type error
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141 * in response to bad packet ip.
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142 *
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143 * The ip packet inside has ip_off and ip_len in host byte order.
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144 */
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145 void
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146 icmp_error(n, type, code, dest, destifp)
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147 struct mbuf *n;
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148 int type, code;
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149 n_long dest;
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diff changeset
150 struct ifnet *destifp;
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diff changeset
151 {
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diff changeset
152 register struct ip *oip = mtod(n, struct ip *), *nip;
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153 register unsigned oiplen = oip->ip_hl << 2;
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diff changeset
154 register struct icmp *icp;
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diff changeset
155 struct mbuf *m, m0;
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diff changeset
156 unsigned icmplen;
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diff changeset
157
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158 #ifdef ICMPPRINTFS
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159 if (icmpprintfs)
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160 printf("icmp_error(%x, %d, %d)\n", oip, type, code);
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161 #endif
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162 if (type != ICMP_REDIRECT)
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diff changeset
163 icmpstat.icps_error++;
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diff changeset
164 /*
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diff changeset
165 * Don't send error if not the first fragment of message.
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diff changeset
166 * Don't error if the old packet protocol was ICMP
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167 * error message, only known informational types.
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168 */
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169 if (oip->ip_off &~ (IP_MF|IP_DF))
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170 goto freeit;
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diff changeset
171 if (oip->ip_p == IPPROTO_ICMP && type != ICMP_REDIRECT &&
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172 n->m_len >= oiplen + ICMP_MINLEN &&
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173 !ICMP_INFOTYPE(((struct icmp *)((caddr_t)oip + oiplen))->icmp_type)) {
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174 icmpstat.icps_oldicmp++;
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175 goto freeit;
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176 }
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177 /* Don't send error in response to a multicast or broadcast packet */
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178 if (n->m_flags & (M_BCAST|M_MCAST))
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179 goto freeit;
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diff changeset
180 /*
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diff changeset
181 * First, formulate icmp message
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182 */
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183 m = m_gethdr(M_DONTWAIT, MT_HEADER);
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184 if (m == NULL)
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185 goto freeit;
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186 icmplen = oiplen + min(8, oip->ip_len);
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187 m->m_len = icmplen + ICMP_MINLEN;
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188 MH_ALIGN(m, m->m_len);
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189 icp = mtod(m, struct icmp *);
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190 if ((u_int)type > ICMP_MAXTYPE)
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191 panic("icmp_error");
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192 icmpstat.icps_outhist[type]++;
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193 icp->icmp_type = type;
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194 if (type == ICMP_REDIRECT)
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195 icp->icmp_gwaddr.s_addr = dest;
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196 else {
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197 icp->icmp_void = 0;
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198 /*
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199 * The following assignments assume an overlay with the
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200 * zeroed icmp_void field.
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201 */
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202 if (type == ICMP_PARAMPROB) {
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203 icp->icmp_pptr = code;
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204 code = 0;
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205 } else if (type == ICMP_UNREACH &&
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206 code == ICMP_UNREACH_NEEDFRAG && destifp)
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207 icp->icmp_nextmtu = htons(destifp->if_mtu);
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208 }
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diff changeset
209
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210 icp->icmp_code = code;
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211 bcopy((caddr_t)oip, (caddr_t)&icp->icmp_ip, icmplen);
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212 nip = &icp->icmp_ip;
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213 nip->ip_off = htons(nip->ip_off);
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214 nip->ip_len = htons(nip->ip_len);
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diff changeset
215
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216 m0.m_next = NULL; /* correct nip->ip_sum */
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217 m0.m_data = (char *)nip;
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218 m0.m_len = nip->ip_hl << 2;
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diff changeset
219 nip->ip_sum = 0;
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220 nip->ip_sum = in_cksum(&m0, nip->ip_hl << 2);
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diff changeset
221
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diff changeset
222 /*
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223 * Now, copy old ip header (without options)
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224 * in front of icmp message.
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225 */
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226 if (m->m_data - sizeof(struct ip) < m->m_pktdat)
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227 panic("icmp len");
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228 m->m_data -= sizeof(struct ip);
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229 m->m_len += sizeof(struct ip);
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230 m->m_pkthdr.len = m->m_len;
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231 m->m_pkthdr.rcvif = n->m_pkthdr.rcvif;
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232 nip = mtod(m, struct ip *);
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233 bcopy((caddr_t)oip, (caddr_t)nip, sizeof(struct ip));
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234 nip->ip_off = htons(nip->ip_off);
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diff changeset
235 nip->ip_len = m->m_len;
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236 nip->ip_hl = sizeof(struct ip) >> 2;
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diff changeset
237 nip->ip_p = IPPROTO_ICMP;
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diff changeset
238 nip->ip_tos = 0;
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diff changeset
239 icmp_reflect(m);
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diff changeset
240
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diff changeset
241 freeit:
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diff changeset
242 m_freem(n);
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diff changeset
243 }
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diff changeset
244
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245 static struct sockaddr_in icmpsrc = { sizeof (struct sockaddr_in), AF_INET };
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246 static struct sockaddr_in icmpdst = { sizeof (struct sockaddr_in), AF_INET };
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247 static struct sockaddr_in icmpgw = { sizeof (struct sockaddr_in), AF_INET };
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diff changeset
248 struct sockaddr_in icmpmask = { 8, 0 };
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diff changeset
249
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diff changeset
250 /*
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diff changeset
251 * Process a received ICMP message.
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diff changeset
252 */
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diff changeset
253 void
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diff changeset
254 #if __STDC__
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diff changeset
255 icmp_input(struct mbuf *m, ...)
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diff changeset
256 #else
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diff changeset
257 icmp_input(m, va_alist)
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diff changeset
258 struct mbuf *m;
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diff changeset
259 va_dcl
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diff changeset
260 #endif
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diff changeset
261 {
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diff changeset
262 int proto;
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diff changeset
263 register struct icmp *icp;
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diff changeset
264 register struct ip *ip = mtod(m, struct ip *);
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diff changeset
265 int icmplen = ip->ip_len;
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diff changeset
266 register int i;
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diff changeset
267 struct in_ifaddr *ia;
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diff changeset
268 void *(*ctlfunc) __P((int, struct sockaddr *, void *));
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diff changeset
269 int code;
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diff changeset
270 extern u_char ip_protox[];
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diff changeset
271 int hlen;
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diff changeset
272 va_list ap;
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diff changeset
273
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diff changeset
274 va_start(ap, m);
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diff changeset
275 hlen = va_arg(ap, int);
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diff changeset
276 proto = va_arg(ap, int);
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diff changeset
277 va_end(ap);
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diff changeset
278
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diff changeset
279 /*
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diff changeset
280 * Locate icmp structure in mbuf, and check
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diff changeset
281 * that not corrupted and of at least minimum length.
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diff changeset
282 */
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diff changeset
283 #ifdef ICMPPRINTFS
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diff changeset
284 if (icmpprintfs) {
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diff changeset
285 char buf[4*sizeof "123"];
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parents:
diff changeset
286
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diff changeset
287 strcpy(buf, inet_ntoa(ip->ip_dst));
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diff changeset
288 printf("icmp_input from %s to %s, len %d\n",
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diff changeset
289 inet_ntoa(ip->ip_src), buf, icmplen);
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diff changeset
290 }
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diff changeset
291 #endif
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diff changeset
292 if (icmplen < ICMP_MINLEN) {
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diff changeset
293 icmpstat.icps_tooshort++;
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diff changeset
294 goto freeit;
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jlarmour
parents:
diff changeset
295 }
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diff changeset
296 i = hlen + min(icmplen, ICMP_ADVLENMIN);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
297 if (m->m_len < i && (m = m_pullup(m, i)) == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
298 icmpstat.icps_tooshort++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
299 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
300 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
301 ip = mtod(m, struct ip *);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
302 m->m_len -= hlen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
303 m->m_data += hlen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
304 icp = mtod(m, struct icmp *);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
305 if (in_cksum(m, icmplen)) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
306 icmpstat.icps_checksum++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
307 goto freeit;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
308 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
309 m->m_len += hlen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
310 m->m_data -= hlen;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
311
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
312 #ifdef ICMPPRINTFS
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 * Message type specific processing.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
315 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
316 if (icmpprintfs)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
317 printf("icmp_input, type %d code %d\n", icp->icmp_type,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
318 icp->icmp_code);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
319 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
320 #if 0 /*KAME IPSEC*/
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jlarmour
parents:
diff changeset
321 /* drop it if it does not match the policy */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
322 if (ipsec4_in_reject(m, NULL)) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
323 ipsecstat.in_polvio++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
324 goto freeit;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
325 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
326 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
327 if (icp->icmp_type > ICMP_MAXTYPE)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
328 goto raw;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
329 icmpstat.icps_inhist[icp->icmp_type]++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
330 code = icp->icmp_code;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
331 switch (icp->icmp_type) {
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 case ICMP_UNREACH:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
334 switch (code) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
335 case ICMP_UNREACH_NET:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
336 case ICMP_UNREACH_HOST:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
337 case ICMP_UNREACH_PROTOCOL:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
338 case ICMP_UNREACH_PORT:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
339 case ICMP_UNREACH_SRCFAIL:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
340 code += PRC_UNREACH_NET;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
341 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
342
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
343 case ICMP_UNREACH_NEEDFRAG:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
344 #if 0 /*NRL INET6*/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
345 if (icp->icmp_nextmtu) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
346 extern int ipv6_trans_mtu
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
347 __P((struct mbuf **, int, int));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
348 struct mbuf *m0 = m;
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 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
351 * Do cool v4-related path MTU, for now,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
352 * only v6-in-v4 can handle it.
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 (icmplen >= ICMP_V6ADVLENMIN &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
355 icmplen >= ICMP_V6ADVLEN(icp) &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
356 icp->icmp_ip.ip_p == IPPROTO_IPV6) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
357 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
358 * ipv6_trans_mtu returns 1 if
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
359 * the mbuf is still intact.
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 if (ipv6_trans_mtu(&m0,icp->icmp_nextmtu,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
362 hlen + ICMP_V6ADVLEN(icp))) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
363 m = m0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
364 goto raw;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
365 } else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
366 return;
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 #endif /* INET6 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
370 code = PRC_MSGSIZE;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
371 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
372
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
373 case ICMP_UNREACH_NET_UNKNOWN:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
374 case ICMP_UNREACH_NET_PROHIB:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
375 case ICMP_UNREACH_TOSNET:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
376 code = PRC_UNREACH_NET;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
377 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
378
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
379 case ICMP_UNREACH_HOST_UNKNOWN:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
380 case ICMP_UNREACH_ISOLATED:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
381 case ICMP_UNREACH_HOST_PROHIB:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
382 case ICMP_UNREACH_TOSHOST:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
383 case ICMP_UNREACH_FILTER_PROHIB:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
384 case ICMP_UNREACH_HOST_PRECEDENCE:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
385 case ICMP_UNREACH_PRECEDENCE_CUTOFF:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
386 code = PRC_UNREACH_HOST;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
387 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
388
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
389 default:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
390 goto badcode;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
391 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
392 goto deliver;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
393
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
394 case ICMP_TIMXCEED:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
395 if (code > 1)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
396 goto badcode;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
397 code += PRC_TIMXCEED_INTRANS;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
398 goto deliver;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
399
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
400 case ICMP_PARAMPROB:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
401 if (code > 1)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
402 goto badcode;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
403 code = PRC_PARAMPROB;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
404 goto deliver;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
405
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
406 case ICMP_SOURCEQUENCH:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
407 if (code)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
408 goto badcode;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
409 code = PRC_QUENCH;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
410 deliver:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
411 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
412 * Problem with datagram; advise higher level routines.
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 if (icmplen < ICMP_ADVLENMIN || icmplen < ICMP_ADVLEN(icp) ||
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
415 icp->icmp_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
416 icmpstat.icps_badlen++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
417 goto freeit;
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 (IN_MULTICAST(icp->icmp_ip.ip_dst.s_addr))
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
420 goto badcode;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
421 NTOHS(icp->icmp_ip.ip_len);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
422 #ifdef INET6
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
423 /* Get more contiguous data for a v6 in v4 ICMP message. */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
424 if (icp->icmp_ip.ip_p == IPPROTO_IPV6) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
425 if (icmplen < ICMP_V6ADVLENMIN ||
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
426 icmplen < ICMP_V6ADVLEN(icp)) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
427 icmpstat.icps_badlen++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
428 goto freeit;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
429 } else {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
430 if (!(m = m_pullup(m, (ip->ip_hl << 2) +
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
431 ICMP_V6ADVLEN(icp)))) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
432 icmpstat.icps_tooshort++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
433 return;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
434 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
435 ip = mtod(m, struct ip *);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
436 icp = (struct icmp *)(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
437 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
438 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
439 #endif /* INET6 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
440 #ifdef ICMPPRINTFS
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
441 if (icmpprintfs)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
442 printf("deliver to protocol %d\n", icp->icmp_ip.ip_p);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
443 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
444 icmpsrc.sin_addr = icp->icmp_ip.ip_dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
445 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
446 * XXX if the packet contains [IPv4 AH TCP], we can't make a
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
447 * notification to TCP layer.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
448 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
449 ctlfunc = inetsw[ip_protox[icp->icmp_ip.ip_p]].pr_ctlinput;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
450 if (ctlfunc)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
451 (*ctlfunc)(code, sintosa(&icmpsrc), &icp->icmp_ip);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
452 break;
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 badcode:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
455 icmpstat.icps_badcode++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
456 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
457
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
458 case ICMP_ECHO:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
459 if (!icmpbmcastecho &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
460 (m->m_flags & (M_MCAST | M_BCAST)) != 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
461 icmpstat.icps_bmcastecho++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
462 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
463 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
464 icp->icmp_type = ICMP_ECHOREPLY;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
465 goto reflect;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
466
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
467 case ICMP_TSTAMP:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
468 if (!icmpbmcastecho &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
469 (m->m_flags & (M_MCAST | M_BCAST)) != 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
470 icmpstat.icps_bmcastecho++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
471 break;
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 if (icmplen < ICMP_TSLEN) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
474 icmpstat.icps_badlen++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
475 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
476 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
477 icp->icmp_type = ICMP_TSTAMPREPLY;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
478 icp->icmp_rtime = iptime();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
479 icp->icmp_ttime = icp->icmp_rtime; /* bogus, do later! */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
480 goto reflect;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
481
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
482 case ICMP_MASKREQ:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
483 if (icmpmaskrepl == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
484 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
485 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
486 * We are not able to respond with all ones broadcast
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
487 * unless we receive it over a point-to-point interface.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
488 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
489 if (icmplen < ICMP_MASKLEN) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
490 icmpstat.icps_badlen++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
491 break;
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 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
494 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
495 icmpdst.sin_addr = ip->ip_src;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
496 else
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
497 icmpdst.sin_addr = ip->ip_dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
498 ia = ifatoia(ifaof_ifpforaddr(sintosa(&icmpdst),
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
499 m->m_pkthdr.rcvif));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
500 if (ia == 0)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
501 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
502 icp->icmp_type = ICMP_MASKREPLY;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
503 icp->icmp_mask = ia->ia_sockmask.sin_addr.s_addr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
504 if (ip->ip_src.s_addr == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
505 if (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
506 ip->ip_src = ia->ia_broadaddr.sin_addr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
507 else if (ia->ia_ifp->if_flags & IFF_POINTOPOINT)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
508 ip->ip_src = ia->ia_dstaddr.sin_addr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
509 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
510 reflect:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
511 ip->ip_len += hlen; /* since ip_input deducts this */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
512 icmpstat.icps_reflect++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
513 icmpstat.icps_outhist[icp->icmp_type]++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
514 icmp_reflect(m);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
515 return;
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 case ICMP_REDIRECT:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
518 if (code > 3)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
519 goto badcode;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
520 if (icmplen < ICMP_ADVLENMIN || icmplen < ICMP_ADVLEN(icp) ||
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
521 icp->icmp_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
522 icmpstat.icps_badlen++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
523 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
524 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
525 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
526 * Short circuit routing redirects to force
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
527 * immediate change in the kernel's routing
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
528 * tables. The message is also handed to anyone
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
529 * listening on a raw socket (e.g. the routing
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
530 * daemon for use in updating its tables).
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
531 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
532 icmpgw.sin_addr = ip->ip_src;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
533 icmpdst.sin_addr = icp->icmp_gwaddr;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
534 #ifdef ICMPPRINTFS
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
535 if (icmpprintfs) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
536 char buf[4 * sizeof "123"];
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
537 strcpy(buf, inet_ntoa(icp->icmp_ip.ip_dst));
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 printf("redirect dst %s to %s\n",
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
540 buf, inet_ntoa(icp->icmp_gwaddr));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
541 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
542 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
543 icmpsrc.sin_addr = icp->icmp_ip.ip_dst;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
544 rtredirect(sintosa(&icmpsrc), sintosa(&icmpdst),
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
545 (struct sockaddr *)0, RTF_GATEWAY | RTF_HOST,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
546 sintosa(&icmpgw), (struct rtentry **)0);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
547 pfctlinput(PRC_REDIRECT_HOST, sintosa(&icmpsrc));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
548 #if 0 /*KAME IPSEC*/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
549 key_sa_routechange((struct sockaddr *)&icmpsrc);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
550 #endif
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
551 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
552
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
553 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
554 * No kernel processing for the following;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
555 * just fall through to send to raw listener.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
556 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
557 case ICMP_ECHOREPLY:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
558 case ICMP_ROUTERADVERT:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
559 case ICMP_ROUTERSOLICIT:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
560 case ICMP_TSTAMPREPLY:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
561 case ICMP_IREQREPLY:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
562 case ICMP_MASKREPLY:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
563 default:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
564 break;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
565 }
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 raw:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
568 rip_input(m, hlen, proto);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
569 return;
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 freeit:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
572 m_freem(m);
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
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
575 /*
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
576 * Reflect the ip packet back to the source
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
577 */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
578 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
579 icmp_reflect(m)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
580 struct mbuf *m;
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 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
583 register struct in_ifaddr *ia;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
584 struct in_addr t;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
585 struct mbuf *opts = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
586 int optlen = (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
587
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
588 if (!in_canforward(ip->ip_src) &&
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
589 ((ip->ip_src.s_addr & IN_CLASSA_NET) !=
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
590 htonl(IN_LOOPBACKNET << IN_CLASSA_NSHIFT))) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
591 m_freem(m); /* Bad return address */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
592 goto done; /* ip_output() will check for broadcast */
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
593 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
594 t = ip->ip_dst;
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parents:
diff changeset
595 ip->ip_dst = ip->ip_src;
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jlarmour
parents:
diff changeset
596 /*
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jlarmour
parents:
diff changeset
597 * If the incoming packet was addressed directly to us,
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jlarmour
parents:
diff changeset
598 * use dst as the src for the reply. Otherwise (broadcast
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jlarmour
parents:
diff changeset
599 * or anonymous), use the address which corresponds
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parents:
diff changeset
600 * to the incoming interface.
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parents:
diff changeset
601 */
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parents:
diff changeset
602 for (ia = in_ifaddr.tqh_first; ia; ia = ia->ia_list.tqe_next) {
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parents:
diff changeset
603 if (t.s_addr == ia->ia_addr.sin_addr.s_addr)
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parents:
diff changeset
604 break;
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parents:
diff changeset
605 if ((ia->ia_ifp->if_flags & IFF_BROADCAST) &&
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parents:
diff changeset
606 t.s_addr == ia->ia_broadaddr.sin_addr.s_addr)
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parents:
diff changeset
607 break;
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parents:
diff changeset
608 }
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parents:
diff changeset
609 icmpdst.sin_addr = t;
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parents:
diff changeset
610 if (ia == (struct in_ifaddr *)0)
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diff changeset
611 ia = ifatoia(ifaof_ifpforaddr(sintosa(&icmpdst),
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parents:
diff changeset
612 m->m_pkthdr.rcvif));
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jlarmour
parents:
diff changeset
613 /*
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parents:
diff changeset
614 * The following happens if the packet was not addressed to us,
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jlarmour
parents:
diff changeset
615 * and was received on an interface with no IP address.
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parents:
diff changeset
616 */
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parents:
diff changeset
617 if (ia == (struct in_ifaddr *)0)
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diff changeset
618 ia = in_ifaddr.tqh_first;
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diff changeset
619 t = ia->ia_addr.sin_addr;
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diff changeset
620 ip->ip_src = t;
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diff changeset
621 ip->ip_ttl = MAXTTL;
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diff changeset
622
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diff changeset
623 if (optlen > 0) {
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diff changeset
624 register u_char *cp;
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diff changeset
625 int opt, cnt;
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diff changeset
626 u_int len;
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diff changeset
627
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parents:
diff changeset
628 /*
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parents:
diff changeset
629 * Retrieve any source routing from the incoming packet;
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jlarmour
parents:
diff changeset
630 * add on any record-route or timestamp options.
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diff changeset
631 */
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diff changeset
632 cp = (u_char *) (ip + 1);
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diff changeset
633 if ((opts = ip_srcroute()) == 0 &&
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diff changeset
634 (opts = m_gethdr(M_DONTWAIT, MT_HEADER))) {
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diff changeset
635 opts->m_len = sizeof(struct in_addr);
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diff changeset
636 mtod(opts, struct in_addr *)->s_addr = 0;
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diff changeset
637 }
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diff changeset
638 if (opts) {
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diff changeset
639 #ifdef ICMPPRINTFS
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diff changeset
640 if (icmpprintfs)
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parents:
diff changeset
641 printf("icmp_reflect optlen %d rt %d => ",
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jlarmour
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diff changeset
642 optlen, opts->m_len);
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diff changeset
643 #endif
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diff changeset
644 for (cnt = optlen; cnt > 0; cnt -= len, cp += len) {
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diff changeset
645 opt = cp[IPOPT_OPTVAL];
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diff changeset
646 if (opt == IPOPT_EOL)
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diff changeset
647 break;
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diff changeset
648 if (opt == IPOPT_NOP)
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diff changeset
649 len = 1;
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diff changeset
650 else {
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diff changeset
651 len = cp[IPOPT_OLEN];
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diff changeset
652 if (len <= 0 || len > cnt)
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diff changeset
653 break;
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diff changeset
654 }
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parents:
diff changeset
655 /*
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parents:
diff changeset
656 * Should check for overflow, but it "can't happen"
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diff changeset
657 */
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diff changeset
658 if (opt == IPOPT_RR || opt == IPOPT_TS ||
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diff changeset
659 opt == IPOPT_SECURITY) {
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diff changeset
660 bcopy((caddr_t)cp,
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diff changeset
661 mtod(opts, caddr_t) + opts->m_len, len);
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diff changeset
662 opts->m_len += len;
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diff changeset
663 }
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diff changeset
664 }
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jlarmour
parents:
diff changeset
665 /* Terminate & pad, if necessary */
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diff changeset
666 if ((cnt = opts->m_len % 4) != 0) {
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diff changeset
667 for (; cnt < 4; cnt++) {
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diff changeset
668 *(mtod(opts, caddr_t) + opts->m_len) =
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parents:
diff changeset
669 IPOPT_EOL;
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diff changeset
670 opts->m_len++;
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diff changeset
671 }
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diff changeset
672 }
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diff changeset
673 #ifdef ICMPPRINTFS
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diff changeset
674 if (icmpprintfs)
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diff changeset
675 printf("%d\n", opts->m_len);
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diff changeset
676 #endif
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diff changeset
677 }
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jlarmour
parents:
diff changeset
678 /*
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jlarmour
parents:
diff changeset
679 * Now strip out original options by copying rest of first
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jlarmour
parents:
diff changeset
680 * mbuf's data back, and adjust the IP length.
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diff changeset
681 */
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diff changeset
682 ip->ip_len -= optlen;
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diff changeset
683 ip->ip_hl = sizeof(struct ip) >> 2;
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jlarmour
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diff changeset
684 m->m_len -= optlen;
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jlarmour
parents:
diff changeset
685 if (m->m_flags & M_PKTHDR)
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jlarmour
parents:
diff changeset
686 m->m_pkthdr.len -= optlen;
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jlarmour
parents:
diff changeset
687 optlen += sizeof(struct ip);
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jlarmour
parents:
diff changeset
688 bcopy((caddr_t)ip + optlen, (caddr_t)(ip + 1),
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jlarmour
parents:
diff changeset
689 (unsigned)(m->m_len - sizeof(struct ip)));
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jlarmour
parents:
diff changeset
690 }
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jlarmour
parents:
diff changeset
691 m->m_flags &= ~(M_BCAST|M_MCAST);
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jlarmour
parents:
diff changeset
692 icmp_send(m, opts);
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jlarmour
parents:
diff changeset
693 done:
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jlarmour
parents:
diff changeset
694 if (opts)
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jlarmour
parents:
diff changeset
695 (void)m_free(opts);
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jlarmour
parents:
diff changeset
696 }
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jlarmour
parents:
diff changeset
697
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
698 /*
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jlarmour
parents:
diff changeset
699 * Send an icmp packet back to the ip level,
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jlarmour
parents:
diff changeset
700 * after supplying a checksum.
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jlarmour
parents:
diff changeset
701 */
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jlarmour
parents:
diff changeset
702 void
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jlarmour
parents:
diff changeset
703 icmp_send(m, opts)
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jlarmour
parents:
diff changeset
704 register struct mbuf *m;
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jlarmour
parents:
diff changeset
705 struct mbuf *opts;
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jlarmour
parents:
diff changeset
706 {
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jlarmour
parents:
diff changeset
707 register struct ip *ip = mtod(m, struct ip *);
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jlarmour
parents:
diff changeset
708 register int hlen;
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jlarmour
parents:
diff changeset
709 register struct icmp *icp;
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jlarmour
parents:
diff changeset
710
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jlarmour
parents:
diff changeset
711 hlen = ip->ip_hl << 2;
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jlarmour
parents:
diff changeset
712 m->m_data += hlen;
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jlarmour
parents:
diff changeset
713 m->m_len -= hlen;
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jlarmour
parents:
diff changeset
714 icp = mtod(m, struct icmp *);
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jlarmour
parents:
diff changeset
715 icp->icmp_cksum = 0;
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jlarmour
parents:
diff changeset
716 icp->icmp_cksum = in_cksum(m, ip->ip_len - hlen);
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jlarmour
parents:
diff changeset
717 m->m_data -= hlen;
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jlarmour
parents:
diff changeset
718 m->m_len += hlen;
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jlarmour
parents:
diff changeset
719 #ifdef ICMPPRINTFS
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jlarmour
parents:
diff changeset
720 if (icmpprintfs) {
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jlarmour
parents:
diff changeset
721 char buf[4 * sizeof "123"];
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jlarmour
parents:
diff changeset
722
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
723 strcpy(buf, inet_ntoa(ip->ip_dst));
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jlarmour
parents:
diff changeset
724 printf("icmp_send dst %s src %s\n",
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jlarmour
parents:
diff changeset
725 buf, inet_ntoa(ip->ip_src));
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jlarmour
parents:
diff changeset
726 }
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jlarmour
parents:
diff changeset
727 #endif
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jlarmour
parents:
diff changeset
728 #if 0 /*KAME IPSEC*/
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jlarmour
parents:
diff changeset
729 m->m_pkthdr.rcvif = NULL;
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jlarmour
parents:
diff changeset
730 #endif /*IPSEC*/
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jlarmour
parents:
diff changeset
731 (void) ip_output(m, opts, NULL, 0, NULL, NULL);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
732 }
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jlarmour
parents:
diff changeset
733
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jlarmour
parents:
diff changeset
734 n_time
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jlarmour
parents:
diff changeset
735 iptime()
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jlarmour
parents:
diff changeset
736 {
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jlarmour
parents:
diff changeset
737 struct timeval atv;
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jlarmour
parents:
diff changeset
738 u_long t;
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jlarmour
parents:
diff changeset
739
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jlarmour
parents:
diff changeset
740 microtime(&atv);
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jlarmour
parents:
diff changeset
741 t = (atv.tv_sec % (24*60*60)) * 1000 + atv.tv_usec / 1000;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
742 return (htonl(t));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
743 }
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744
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745 #ifdef CYGPKG_NET_SYSCTL
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746 int
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747 icmp_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
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748 int *name;
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749 u_int namelen;
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750 void *oldp;
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751 size_t *oldlenp;
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752 void *newp;
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753 size_t newlen;
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754 {
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755
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756 /* All sysctl names at this level are terminal. */
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757 if (namelen != 1)
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758 return (ENOTDIR);
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759
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760 switch (name[0]) {
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761 case ICMPCTL_MASKREPL:
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762 return (sysctl_int(oldp, oldlenp, newp, newlen, &icmpmaskrepl));
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763 case ICMPCTL_BMCASTECHO:
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764 return (sysctl_int(oldp, oldlenp, newp, newlen, &icmpbmcastecho));
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765 default:
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766 return (ENOPROTOOPT);
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767 }
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768 /* NOTREACHED */
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769 }
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770 #endif // CYGPKG_NET_SYSCTL