2 * Copyright (C) 1999-2001 Internet Software Consortium.
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
9 * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
10 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
11 * INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
13 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
14 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
15 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 /* $Id: net.c,v 1.25 2001/11/30 01:59:45 gson Exp $ */
26 #include <isc/strerror.h>
27 #include <isc/string.h>
30 #if defined(ISC_PLATFORM_HAVEIPV6) && defined(ISC_PLATFORM_NEEDIN6ADDRANY)
31 const struct in6_addr isc_net_in6addrany = IN6ADDR_ANY_INIT;
34 static isc_boolean_t once = ISC_FALSE;
35 static isc_result_t ipv4_result = ISC_R_NOTFOUND;
36 static isc_result_t ipv6_result = ISC_R_NOTFOUND;
39 try_proto(int domain) {
41 isc_result_t result = ISC_R_SUCCESS;
42 char strbuf[ISC_STRERRORSIZE];
44 s = socket(domain, SOCK_STREAM, 0);
50 #ifdef EPROTONOSUPPORT
56 return (ISC_R_NOTFOUND);
58 isc__strerror(errno, strbuf, sizeof(strbuf));
59 UNEXPECTED_ERROR(__FILE__, __LINE__,
62 return (ISC_R_UNEXPECTED);
66 #ifdef ISC_PLATFORM_HAVEIPV6
67 #ifdef ISC_PLATFORM_HAVEIN6PKTINFO
68 if (domain == PF_INET6) {
69 struct sockaddr_in6 sin6;
73 * Check to see if IPv6 is broken, as is common on Linux.
76 if (getsockname(s, (struct sockaddr *)&sin6, (void *)&len) < 0)
78 result = ISC_R_NOTFOUND;
80 if (len == sizeof(struct sockaddr_in6))
81 result = ISC_R_SUCCESS;
83 result = ISC_R_NOTFOUND;
96 initialize_action(void) {
97 ipv4_result = try_proto(PF_INET);
98 #ifdef ISC_PLATFORM_HAVEIPV6
99 #ifdef ISC_PLATFORM_HAVEIN6PKTINFO
100 ipv6_result = try_proto(PF_INET6);
107 if(once == ISC_FALSE) {
114 isc_net_probeipv4(void) {
116 return (ipv4_result);
120 isc_net_probeipv6(void) {
122 return (ipv6_result);