flash_v2: packages/net/ns/dns/current/src/dns.c annotate

annotate packages/net/ns/dns/current/src/dns.c @ 1777:c16341b1bac6 default tip

* Added execute permissions to files missed in conversion from CVS

author	alexs
date	Mon, 12 Oct 2009 02:26:09 +0100
parents	f7cb1caf8d2a
children

rev	line source
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	1 //=============================================================================
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	2 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	3 // dns.c
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	4 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	5 // DNS client code
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	6 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	7 //=============================================================================
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	8 //####ECOSGPLCOPYRIGHTBEGIN####
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	9 // -------------------------------------------
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	10 // This file is part of eCos, the Embedded Configurable Operating System.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	12 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	13 // eCos is free software; you can redistribute it and/or modify it under
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	14 // the terms of the GNU General Public License as published by the Free
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	15 // Software Foundation; either version 2 or (at your option) any later version.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	16 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	20 // for more details.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	21 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	22 // You should have received a copy of the GNU General Public License along
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	23 // with eCos; if not, write to the Free Software Foundation, Inc.,
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	25 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	26 // As a special exception, if other files instantiate templates or use macros
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	27 // or inline functions from this file, or you compile this file and link it
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	28 // with other works to produce a work based on this file, this file does not
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	29 // by itself cause the resulting work to be covered by the GNU General Public
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	30 // License. However the source code for this file must still be made available
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	31 // in accordance with section (3) of the GNU General Public License.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	32 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	33 // This exception does not invalidate any other reasons why a work based on
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	34 // this file might be covered by the GNU General Public License.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	35 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
210 d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	37 // at http://sources.redhat.com/ecos/ecos-license/
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	38 // -------------------------------------------
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	39 //####ECOSGPLCOPYRIGHTEND####
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	40 //=============================================================================
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	41 //#####DESCRIPTIONBEGIN####
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	42 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	43 // Author(s): andrew.lunn
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	44 // Contributors:andrew.lunn, jskov
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	45 // Date: 2001-09-18
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	46 // Description: Provides DNS lookup as per RFC 1034/1035.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	47 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	48 // Note: Does only support A and PTR lookups. Maybe add for other
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	49 // types as well?
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	50 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	51 // parse_answer() only returns the first found record.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	52 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	53 // Add tracing and assertions.
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	54 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	55 //####DESCRIPTIONEND####
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	56 //
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	57 //=============================================================================
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	58
210 d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	59 #include <pkgconf/system.h>
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	60 #ifdef CYGPKG_KERNEL
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	61 # include <pkgconf/kernel.h>
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	62 # include <cyg/kernel/kapi.h>
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	63 #endif
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	64 #include <cyg/hal/drv_api.h>
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	65 #include <cyg/infra/cyg_type.h>
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	66 #include <cyg/infra/cyg_trac.h> /* Tracing support */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	67
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	68 #include <netdb.h>
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	69
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	70 #include <sys/time.h>
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	71 #include <sys/types.h>
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	72 #include <sys/socket.h>
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	73 #include <arpa/inet.h>
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	74
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	75 #include <ctype.h>
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	76 #include <unistd.h>
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	77 #include <stdio.h>
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	78 #include <string.h>
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	79 #include <stdlib.h>
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	80
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	81 #include <cyg/ns/dns/dns_priv.h>
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	82
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	83 static short id = 0; /* ID of the last query */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	84 static int s = -1; /* Socket to the DNS server */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	85 static cyg_drv_mutex_t dns_mutex; /* Mutex to stop multiple queries as once */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	86 static cyg_ucount32 ptdindex; /* Index for the per thread data */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	87 static char * domainname=NULL; /* Domain name used for queries */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	88
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	89 /* Allocate space for string of length len. Return NULL on failure. */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	90 static inline char*
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	91 alloc_string(int len)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	92 {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	93 return malloc(len);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	94 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	95
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	96 static inline void
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	97 free_string(char* s)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	98 {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	99 free(s);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	100 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	101
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	102 /* Deallocate the memory taken to hold a hent structure */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	103 static void
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	104 free_hent(struct hostent * hent)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	105 {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	106 if (hent->h_name) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	107 free_string(hent->h_name);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	108 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	109
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	110 if (hent->h_addr_list) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	111 int i = 0;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	112 while (hent->h_addr_list[i]) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	113 free(hent->h_addr_list[i]);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	114 i++;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	115 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	116 free(hent->h_addr_list);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	117 }
211 6eb55882e01c Merge from eCos master repository on 2002-05-29-16:32:18-BST jlarmour parents: 210 diff changeset	118 free(hent);
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	119 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	120
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	121 /* Allocate hent structure with room for one in_addr. Returns NULL on
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	122 failure. */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	123 static struct hostent*
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	124 alloc_hent(void)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	125 {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	126 struct hostent *hent;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	127
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	128 hent = malloc(sizeof(struct hostent));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	129 if (hent) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	130 memset(hent, 0, sizeof(struct hostent));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	131 hent->h_addr_list = malloc(sizeof(char )2);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	132 if (!hent->h_addr_list) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	133 free_hent(hent);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	134 return NULL;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	135 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	136 hent->h_addr_list[0] = malloc(sizeof(struct in_addr));
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	137 if (!hent->h_addr_list[0]) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	138 free_hent(hent);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	139 return NULL;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	140 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	141 hent->h_addr_list[1] = NULL;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	142 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	143
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	144 return hent;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	145 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	146
210 d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	147 /* Thread destructor used to free stuff stored in per-thread data slot. */
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	148 static void
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	149 thread_destructor(CYG_ADDRWORD data)
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	150 {
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	151 struct hostent *hent;
212 94b558c9fb67 Merge from eCos master repository on 2002-05-31-00:05:29-BST jlarmour parents: 211 diff changeset	152 hent = (struct hostent *)cyg_thread_get_data(ptdindex);
210 d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	153 if (hent)
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	154 free_hent(hent);
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	155 return;
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	156 data=data;
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	157 }
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	158
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	159 /* Store the hent away in the per-thread data. */
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	160 static void
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	161 store_hent(struct hostent *hent)
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	162 {
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	163 // Prevent memory leaks by setting a destructor to be
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	164 // called on thread exit to free per-thread data.
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	165 cyg_thread_add_destructor( &thread_destructor, 0 );
212 94b558c9fb67 Merge from eCos master repository on 2002-05-31-00:05:29-BST jlarmour parents: 211 diff changeset	166 cyg_thread_set_data(ptdindex, (CYG_ADDRWORD)hent);
210 d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	167 }
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	168
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	169 /* If there is an answer to an old query, free the memory it uses. */
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	170 static void
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	171 free_stored_hent(void)
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	172 {
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	173 struct hostent *hent;
212 94b558c9fb67 Merge from eCos master repository on 2002-05-31-00:05:29-BST jlarmour parents: 211 diff changeset	174 hent = (struct hostent *)cyg_thread_get_data(ptdindex);
210 d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	175 if (hent) {
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	176 free_hent(hent);
212 94b558c9fb67 Merge from eCos master repository on 2002-05-31-00:05:29-BST jlarmour parents: 211 diff changeset	177 cyg_thread_set_data(ptdindex, (CYG_ADDRWORD)NULL);
210 d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	178 cyg_thread_rem_destructor( &thread_destructor, 0 );
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	179 }
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	180 }
d2c90368aeef Merge from eCos master repository on 2002-05-23-21:39:14-BST jlarmour parents: 208 diff changeset	181
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	182 /* Send the query to the server and read the response back. Return -1
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	183 if it fails, otherwise put the response back in msg and return the
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	184 length of the response. */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	185 static int
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	186 send_recv(char * msg, int len, int msglen)
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	187 {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	188 struct dns_header *dns_hdr;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	189 struct timeval timeout;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	190 int finished = false;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	191 int backoff = 1;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	192 fd_set readfds;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	193 int written;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	194 int ret;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	195
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	196 CYG_REPORT_FUNCNAMETYPE( "send_recv", "returning %d" );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	197 CYG_REPORT_FUNCARG3( "msg=%08x, len=%d, msglen", msg, len, msglen );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	198
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	199 CYG_CHECK_DATA_PTR( msg, "msg is not a valid pointer!" );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	200
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	201 dns_hdr = (struct dns_header *) msg;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	202
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	203 do {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	204 written = write(s, msg, len);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	205 if (written < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	206 ret = -1;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	207 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	208 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	209
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	210 FD_ZERO(&readfds);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	211 FD_SET(s, &readfds);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	212
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	213 timeout.tv_sec = backoff;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	214 timeout.tv_usec = 0;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	215 backoff = backoff << 1;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	216
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	217 ret = select(s+1, &readfds, NULL, NULL, &timeout);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	218 if (ret < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	219 ret = -1;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	220 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	221 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	222 /* Timeout */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	223 if (ret == 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	224 if (backoff > 16) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	225 h_errno = TRY_AGAIN;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	226 ret = -1;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	227 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	228 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	229 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	230 if (ret == 1) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	231 ret = read(s, msg, msglen);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	232 if (ret < 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	233 ret = -1;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	234 break;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	235 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	236
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	237 /* Reply to an old query. Ignore it */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	238 if (ntohs(dns_hdr->id) != (id-1)) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	239 continue;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	240 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	241 finished = true;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	242 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	243 } while (!finished);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	244
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	245 CYG_REPORT_RETVAL( ret );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	246
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	247 return ret;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	248 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	249
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	250 /* Include the DNS client implementation code */
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	251 #include <cyg/ns/dns/dns_impl.inl>
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	252
1040 1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	253 /* (re)Start the DNS client. This opens a socket to the DNS server
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	254 who's address is passed in. This address can be either an IPv4 or
1069 edfa7bed5cb2 Pure pedantry: fix some typos in comments jlarmour parents: 1040 diff changeset	255 IPv6 address. This function can be called multiple times. If we
edfa7bed5cb2 Pure pedantry: fix some typos in comments jlarmour parents: 1040 diff changeset	256 are being called a second time we have to be careful to allow any
edfa7bed5cb2 Pure pedantry: fix some typos in comments jlarmour parents: 1040 diff changeset	257 ongoing lookups to finish before we close the socket and connect to
edfa7bed5cb2 Pure pedantry: fix some typos in comments jlarmour parents: 1040 diff changeset	258 a different DNS server. The danger here is that we may have to wait
edfa7bed5cb2 Pure pedantry: fix some typos in comments jlarmour parents: 1040 diff changeset	259 for up to 32 seconds if the DNS server is down.
edfa7bed5cb2 Pure pedantry: fix some typos in comments jlarmour parents: 1040 diff changeset	260 Each invocation will close any previous connection and make a new
1040 1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	261 connection to the new server. Note the address of the server must
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	262 be in numeric form since its not possible to do a DNS lookup! */
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	263
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	264 int cyg_dns_res_start(char * dns_server) {
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	265
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	266 static int init =0;
1040 1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	267 struct addrinfo * res;
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	268 int err;
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	269
1040 1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	270 CYG_REPORT_FUNCNAMETYPE( "cyg_dns_res_start", "returning %d" );
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	271 CYG_REPORT_FUNCARG1( "dns_server=%s", dns_server );
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	272
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	273 CYG_CHECK_DATA_PTR( dns_server, "dns_server is not a valid pointer!" );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	274
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	275 if (init) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	276 cyg_drv_mutex_lock(&dns_mutex);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	277 cyg_thread_free_data_index(ptdindex);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	278 if (s >= 0) {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	279 close(s);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	280 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	281 } else {
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	282 init = 1;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	283 cyg_drv_mutex_init(&dns_mutex);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	284 cyg_drv_mutex_lock(&dns_mutex);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	285 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	286
1040 1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	287 err = getaddrinfo(dns_server,"domain", NULL, &res);
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	288 if (err != 0) {
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	289 cyg_drv_mutex_unlock(&dns_mutex);
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	290 CYG_REPORT_RETVAL( -1 );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	291 return -1;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	292 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	293
1040 1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	294 s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	295 if (s == -1) {
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	296 cyg_drv_mutex_unlock(&dns_mutex);
1040 1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	297 freeaddrinfo(res);
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	298 CYG_REPORT_RETVAL( -1 );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	299 return -1;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	300 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	301
1040 1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	302 if (connect(s, res->ai_addr, res->ai_addrlen) < 0) {
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	303 s = -1;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	304 cyg_drv_mutex_unlock(&dns_mutex);
1040 1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	305 freeaddrinfo(res);
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	306 CYG_REPORT_RETVAL( -1 );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	307 return -1;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	308 }
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	309 ptdindex = cyg_thread_new_data_index();
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	310
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	311 cyg_drv_mutex_unlock(&dns_mutex);
1040 1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	312 freeaddrinfo(res);
208 e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	313 CYG_REPORT_RETVAL( 0 );
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	314 return 0;
e0c0827131d1 Merge from eCos master repository on 2002-05-20-20:11:54-BST jlarmour parents: diff changeset	315 }
1005 1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	316
1040 1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	317 /* This is the old interface to start the resolver. It is only IPv4
1069 edfa7bed5cb2 Pure pedantry: fix some typos in comments jlarmour parents: 1040 diff changeset	318 capable and so is now deprecated in favor of cyg_dns_res_start().
1040 1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	319 Initialise the resolver. Open a socket and bind it to the
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	320 address of the server. return -1 if something goes wrong,
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	321 otherwise 0. If we are being called a second time we have to be
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	322 careful to allow any ongoing lookups to finish before we close the
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	323 socket and connect to a different DNS server. The danger here is
1069 edfa7bed5cb2 Pure pedantry: fix some typos in comments jlarmour parents: 1040 diff changeset	324 that we may have to wait for up to 32 seconds if the DNS server is
1040 1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	325 down. */
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	326 int
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	327 cyg_dns_res_init(struct in_addr *dns_server)
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	328 {
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	329 char name[20];
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	330 unsigned char bytes = (unsigned char )dns_server;
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	331 int ret;
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	332
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	333 CYG_REPORT_FUNCNAMETYPE( "cyg_dns_res_init", "returning %d" );
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	334 CYG_REPORT_FUNCARG1( "dns_server=%08x", dns_server );
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	335
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	336 diag_sprintf(name, "%d.%d.%d.%d", bytes[0], bytes[1], bytes[2], bytes[3]);
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	337
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	338 ret = cyg_dns_res_start(name);
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	339
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	340 CYG_REPORT_RETVAL( ret );
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	341 return ret;
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	342 }
1aaed612fe59 * src/dns.c: (cyg_dns_res_start) New: Allow IPv6 to be used to asl parents: 1005 diff changeset	343
1005 1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	344 /* add_answer checks to see if we already have this answer and if not,
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	345 adds it to the answers. */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	346 static int
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	347 add_answer(char *rdata, short rr_type, int family,
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	348 struct sockaddr addrs[], int num, int used) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	349 int i;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	350 int found = 0;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	351
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	352 for (i = 0; i < used ; i++) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	353 if ((addrs[i].sa_family == family) &&
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	354 !memcmp(addrs[i].sa_data, rdata, addrs[i].sa_len)) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	355 found = 1;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	356 break;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	357 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	358 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	359 if (!found) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	360 memset(&addrs[used],0,sizeof(addrs[used]));
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	361 addrs[used].sa_family = family;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	362
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	363 switch(family) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	364 case AF_INET: {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	365 struct sockaddr_in * addr = (struct sockaddr_in *) &addrs[used];
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	366 addr->sin_len = sizeof(*addr);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	367 memcpy(&addr->sin_addr, rdata, sizeof(struct in_addr));
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	368 used++;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	369 break;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	370 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	371 #ifdef CYGPKG_NET_INET6
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	372 case AF_INET6: {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	373 struct sockaddr_in6 * addr = (struct sockaddr_in6 *) &addrs[used];
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	374 addr->sin6_len = sizeof(*addr);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	375 memcpy(&addr->sin6_addr, rdata, sizeof(struct in6_addr));
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	376 used++;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	377 break;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	378 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	379 #endif
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	380 default:
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	381 used = -EAI_FAMILY;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	382 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	383 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	384 return used;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	385 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	386
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	387 /* This decodes the answer and puts the results into the addrs
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	388 array. This function can deal with IPv6 AAAA records as well as A
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	389 records. Thus its more complex than the parse_answer function in
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	390 the inline code. This complexity is only needed by getaddrinfo, so
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	391 i decided to leave parse_anser alone. */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	392
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	393 static int
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	394 decode(char *msg, short rr_type, int family,
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	395 struct sockaddr addrs[], int num, int used, char **canon) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	396
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	397 struct dns_header *dns_hdr;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	398 struct resource_record rr, *rr_p = NULL;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	399 char *qname = NULL;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	400 char *ptr;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	401
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	402 dns_hdr = (struct dns_header *)msg;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	403
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	404 if (DNS_REPLY_NAME_ERROR == dns_hdr->rcode) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	405 h_errno = HOST_NOT_FOUND;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	406 return -EAI_NONAME;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	407 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	408
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	409 if ((dns_hdr->qr != 1) \|\|
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	410 (dns_hdr->opcode != DNS_QUERY)) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	411 return -EAI_FAIL;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	412 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	413
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	414 if (dns_hdr->rcode != DNS_REPLY_NOERR) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	415 return -EAI_NONAME;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	416 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	417
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	418 dns_hdr->ancount = ntohs(dns_hdr->ancount);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	419 dns_hdr->qdcount = ntohs(dns_hdr->qdcount);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	420 ptr = (char *)&dns_hdr[1];
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	421
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	422 /* Skip over the query section */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	423 if (dns_hdr->qdcount > 0) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	424 while (dns_hdr->qdcount) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	425 ptr += qname_len(ptr);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	426 ptr += 4; /* skip type & class */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	427 dns_hdr->qdcount--;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	428 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	429 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	430
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	431 /* Read the answers resource records to find an answer of the
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	432 correct type. */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	433 while (dns_hdr->ancount && (used >= 0) && (used < num)) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	434 qname = ptr;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	435 ptr += qname_len(ptr);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	436 rr_p = (struct resource_record *)ptr;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	437 memcpy(&rr, ptr, sizeof(rr));
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	438 if ((rr.rr_type == htons(rr_type)) &&
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	439 (rr.class == htons(DNS_CLASS_IN))) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	440 used = add_answer(rr_p->rdata, rr_type, family, addrs, num, used);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	441 if (canon && !*canon) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	442 *canon = real_name(msg,qname);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	443 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	444 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	445 ptr += sizeof(struct resource_record) -
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	446 sizeof(rr.rdata) + ntohs(rr.rdlength);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	447 dns_hdr->ancount--;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	448 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	449 if (used == 0) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	450 return -EAI_NONAME;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	451 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	452 return used;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	453 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	454
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	455 /* Do a lookup for a particular type of resource record. */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	456 static int
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	457 do_lookup (const char * hostname,
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	458 struct sockaddr addrs[], int num, int used,
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	459 short rr_type, int family, char **canon) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	460
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	461 unsigned char msg[MAXDNSMSGSIZE];
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	462 int error;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	463 int len;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	464
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	465 /* First try the name as passed in */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	466 memset(msg, 0, sizeof(msg));
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	467 len = build_query(msg, hostname, rr_type);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	468 if (len < 0) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	469 return -EAI_FAIL;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	470 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	471
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	472 /* Send the query and wait for an answer */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	473 len = send_recv(msg, len, sizeof(msg));
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	474 if (len < 0) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	475 return -EAI_FAIL;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	476 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	477
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	478 /* Decode the answer */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	479 error = decode(msg, rr_type, family, addrs, num, used, canon);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	480 return error;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	481 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	482
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	483 static int do_lookups(const char * hostname,
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	484 struct sockaddr addrs[], int num,
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	485 int family, char ** canon) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	486 int error;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	487 #ifdef CYGPKG_NET_INET6
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	488 int error6;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	489 #endif
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	490
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	491 switch (family) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	492 case AF_INET:
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	493 error = do_lookup(hostname, addrs, num, 0, DNS_TYPE_A, AF_INET, canon);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	494 break;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	495 #ifdef CYGPKG_NET_INET6
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	496 case AF_INET6:
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	497 error = do_lookup(hostname, addrs, num, 0, DNS_TYPE_AAAA, AF_INET6, canon);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	498 break;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	499 #endif
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	500 case PF_UNSPEC:
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	501 #ifndef CYGPKG_NET_INET6
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	502 error = do_lookup(hostname, addrs, num, 0, DNS_TYPE_A, AF_INET, canon);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	503 #else
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	504 #ifdef CYGOPT_NS_DNS_FIRST_FAMILTY_AF_INET
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	505 error = do_lookup(hostname, addrs, num, 0, DNS_TYPE_A, AF_INET, canon);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	506 if (error > 0 ) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	507 error6 = do_lookup(hostname, addrs, num, error, DNS_TYPE_AAAA,
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	508 AF_INET6, canon);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	509 } else {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	510 error6 = do_lookup(hostname, addrs, num, 0, DNS_TYPE_AAAA,
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	511 AF_INET6, canon);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	512 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	513 if (error6 > 0) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	514 error = error6;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	515 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	516 #else // CYGOPT_NS_DNS_FIRST_FAMILY_AF_INET
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	517 error6 = do_lookup(hostname, addrs, num, 0, DNS_TYPE_AAAA,
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	518 AF_INET6, canon);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	519 if (error6> 0 ) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	520 error = do_lookup(hostname, addrs, num, error6, DNS_TYPE_A,
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	521 AF_INET, canon);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	522 } else {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	523 error = do_lookup(hostname, addrs, num, 0, DNS_TYPE_A,
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	524 AF_INET, canon);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	525 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	526 #endif // CYGOPT_NS_DNS_FIRST_FAMILY_AF_INET
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	527 #endif // CYGPKG_NET_INET6
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	528 break;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	529 default:
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	530 error = -EAI_FAMILY;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	531 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	532 return error;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	533 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	534
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	535 /* This implements the interface between getaddrinfo and the dns
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	536 client. hostent is not used here since that only works with IPv4
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	537 addresses, where as this function needs to be protocol
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	538 independent. */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	539 int
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	540 cyg_dns_getaddrinfo(const char * hostname,
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	541 struct sockaddr addrs[], int num,
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	542 int family,
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	543 char ** canon)
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	544 {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	545 int error;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	546 char name[256];
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	547 char * dot;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	548
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	549 CYG_REPORT_FUNCNAMETYPE( "cyg_dns_getaddrinfo", "returning %08x" );
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	550 CYG_REPORT_FUNCARG3( "hostname=%08x, addrs=%08x, num=%2d",
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	551 hostname, addrs, num );
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	552
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	553 if ( !hostname \|\| !addrs \|\| !num ) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	554 CYG_REPORT_RETVAL( NULL );
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	555 return -EAI_FAIL;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	556 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	557
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	558 CYG_CHECK_DATA_PTR( hostname, "hostname is not a valid pointer!" );
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	559 CYG_CHECK_DATA_PTR( addrs, "addrs is not a valid pointer!");
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	560 CYG_ASSERT( num > 0, "Invalid number of sockaddr stuctures");
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	561
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	562 if (!valid_hostname(hostname)) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	563 /* it could be a dot address */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	564 struct sockaddr_in * sa4 = (struct sockaddr_in *)&addrs[0];
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	565 memset(&addrs[0],0,sizeof(struct sockaddr));
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	566 if (inet_pton(AF_INET, hostname, (char *)&sa4->sin_addr.s_addr)) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	567 sa4->sin_family = AF_INET;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	568 sa4->sin_len = sizeof(*sa4);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	569 CYG_REPORT_RETVAL (1);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	570 return 1;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	571 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	572 #ifdef CYGPKG_NET_INET6
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	573 {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	574 /* it could be a colon address */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	575 struct sockaddr_in6 * sa6 = (struct sockaddr_in6 *)&addrs[0];
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	576 memset(&addrs[0],0,sizeof(struct sockaddr));
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	577 if (inet_pton(AF_INET6, hostname, (char *)&sa6->sin6_addr.s6_addr)) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	578 sa6->sin6_family = AF_INET6;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	579 sa6->sin6_len = sizeof(*sa6);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	580 CYG_REPORT_RETVAL (1);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	581 return 1;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	582 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	583 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	584 #endif
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	585 CYG_REPORT_RETVAL (-EAI_NONAME);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	586 return -EAI_NONAME;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	587 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	588
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	589 /* Has the socket to the DNS server been opened? */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	590 if (s < 0) {
1691 c81db0785971 * src/dns.c (cyg_dns_getaddrinfo): Typo spotted by Andy Jackson. asl parents: 1069 diff changeset	591 CYG_REPORT_RETVAL( -EAI_FAIL );
1005 1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	592 return -EAI_FAIL;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	593 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	594
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	595 if (domainname) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	596 if ((strlen(hostname) + strlen(domainname)) > 254) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	597 cyg_drv_mutex_unlock(&dns_mutex);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	598 CYG_REPORT_RETVAL( -EAI_FAIL );
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	599 return -EAI_FAIL;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	600 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	601 strcpy(name, hostname);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	602 strcat(name, ".");
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	603 strcat(name, domainname);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	604 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	605 cyg_drv_mutex_lock(&dns_mutex);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	606
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	607 /* If the hostname ends with . it a FQDN. Don't bother adding the
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	608 domainname. If it does not contain a . , try appending with the
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	609 domainname first. If it does have a . , try without a domain name
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	610 first. */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	611
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	612 dot = rindex(hostname,'.');
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	613 if (dot) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	614 if (*(dot+1) == '\0') {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	615 /* FQDN */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	616 error = do_lookups(hostname, addrs, num, family, canon);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	617 } else {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	618 /* Dot somewhere */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	619 error = do_lookups(hostname, addrs, num, family, canon);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	620 if (domainname && (error == -EAI_NONAME)) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	621 error = do_lookups(name, addrs, num, family, canon);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	622 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	623 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	624 } else {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	625 /* No Dot. Try adding domainname first */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	626 error = -EAI_NONAME;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	627 if (domainname) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	628 error = do_lookups(name, addrs, num, family, canon);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	629 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	630 if (error == -EAI_NONAME) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	631 error = do_lookups(hostname, addrs, num, family, canon);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	632 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	633 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	634 cyg_drv_mutex_unlock(&dns_mutex);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	635 CYG_REPORT_RETVAL( error );
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	636 return error;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	637 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	638
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	639 /* This implements the interface between getnameinfo and the dns
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	640 client. */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	641 externC int
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	642 cyg_dns_getnameinfo(const struct sockaddr * sa, char * host, size_t hostlen)
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	643 {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	644 char hostname[80];
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	645 unsigned char msg[MAXDNSMSGSIZE];
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	646 struct hostent * hent;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	647 int len;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	648
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	649 CYG_REPORT_FUNCNAMETYPE( "cyg_dns_getnameinfo", "returning %08x" );
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	650 CYG_REPORT_FUNCARG3( "sa=%08x, host=%08x, hostlen=%3d",
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	651 sa, host, hostlen );
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	652
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	653 CYG_CHECK_DATA_PTR( sa, "sa is not a valid pointer");
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	654 CYG_CHECK_DATA_PTR( host, "host is not a valid data pointer");
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	655 CYG_ASSERT(hostlen >0, "Invalid host length");
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	656
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	657 /* Has the socket to the DNS server been opened? */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	658 if (s < 0) {
1692 f7cb1caf8d2a * src/dns.c (cyg_dns_getnameinfo): And another typo asl parents: 1691 diff changeset	659 CYG_REPORT_RETVAL( -EAI_FAIL );
1005 1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	660 return -EAI_FAIL;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	661 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	662
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	663 cyg_drv_mutex_lock(&dns_mutex);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	664
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	665 switch (sa->sa_family) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	666 case AF_INET: {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	667 struct sockaddr_in * sa4 = (struct sockaddr_in *)sa;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	668 unsigned char * addr = (char *)&sa4->sin_addr.s_addr;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	669 sprintf(hostname, "%d.%d.%d.%d.IN-ADDR.ARPA.",
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	670 addr[3],addr[2],addr[1],addr[0]);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	671 break;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	672 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	673 #ifdef CYGPKG_NET_INET6
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	674 case AF_INET6: {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	675 struct sockaddr_in6 * sa6 = (struct sockaddr_in6 *)sa;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	676 int i;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	677
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	678 for (i=15; i >= 0; i--) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	679 sprintf(&hostname[(1522) - (i22)], "%x.%x.",
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	680 sa6->sin6_addr.s6_addr[i] & 0x0f,
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	681 (sa6->sin6_addr.s6_addr[i] & 0xf0) >> 4);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	682 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	683 sprintf(&hostname[1622],"IP6.INT");
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	684 break;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	685 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	686 #endif
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	687 default:
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	688 cyg_drv_mutex_lock(&dns_mutex);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	689 CYG_REPORT_RETVAL( -EAI_FAMILY);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	690 return -EAI_FAMILY;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	691 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	692
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	693 memset(msg, 0, sizeof(msg));
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	694
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	695 /* Build a PTR type request using the hostname */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	696 len = build_query(msg, hostname, DNS_TYPE_PTR);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	697 if (len < 0) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	698 cyg_drv_mutex_unlock(&dns_mutex);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	699 CYG_REPORT_RETVAL( -EAI_FAIL );
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	700 return -EAI_FAIL;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	701 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	702
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	703 /* Send the request and wait for an answer */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	704 len = send_recv(msg, len, sizeof(msg));
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	705 if (len < 0) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	706 cyg_drv_mutex_unlock(&dns_mutex);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	707 CYG_REPORT_RETVAL( -EAI_FAIL );
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	708 return -EAI_FAIL;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	709 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	710
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	711 /* Parse the answer for the host name */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	712 hent = parse_answer(msg, DNS_TYPE_PTR);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	713
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	714 /* If no name is known return an error */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	715 if (!hent) {
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	716 cyg_drv_mutex_unlock(&dns_mutex);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	717 CYG_REPORT_RETVAL( -EAI_NONAME );
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	718 return -EAI_NONAME;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	719 }
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	720
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	721 /* Otherwise copy it into our results buffer and tidy up */
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	722 strncpy(host, hent->h_name,hostlen);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	723 free_hent(hent);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	724
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	725 cyg_drv_mutex_unlock(&dns_mutex);
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	726 CYG_REPORT_RETVAL( -EAI_NONE );
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	727 return -EAI_NONE;
1f968b35cd30 * doc/dns.sgml: Updated to reflect changes for IPv6. asl parents: 212 diff changeset	728 }

Mercurial > flash_v2

annotate packages/net/ns/dns/current/src/dns.c @ 1777:c16341b1bac6 default tip