(issue ASTERISK-19658) Reported by: Matt Jordan Review: https://reviewboard.asterisk.org/r/1905/ ........ Merged revisions 366094 from http://svn.asterisk.org/svn/asterisk/branches/1.8 ........ Merged revisions 366106 from http://svn.asterisk.org/svn/asterisk/branches/10 git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@366126 65c4cc65-6c06-0410-ace0-fbb531ad65f3
775 lines
20 KiB
C
775 lines
20 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2006, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Various sorts of access control
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*
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* \author Mark Spencer <markster@digium.com>
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*/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/network.h"
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#if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__Darwin__)
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#include <fcntl.h>
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#include <net/route.h>
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#endif
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#if defined(SOLARIS)
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#include <sys/sockio.h>
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#include <net/if.h>
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#elif defined(HAVE_GETIFADDRS)
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#include <ifaddrs.h>
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#endif
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#include "asterisk/acl.h"
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#include "asterisk/channel.h"
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#include "asterisk/utils.h"
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#include "asterisk/lock.h"
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#include "asterisk/srv.h"
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#if (!defined(SOLARIS) && !defined(HAVE_GETIFADDRS))
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static int get_local_address(struct ast_sockaddr *ourip)
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{
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return -1;
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}
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#else
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static void score_address(const struct sockaddr_in *sin, struct in_addr *best_addr, int *best_score)
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{
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const char *address;
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int score;
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address = ast_inet_ntoa(sin->sin_addr);
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/* RFC 1700 alias for the local network */
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if (address[0] == '0') {
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score = -25;
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/* RFC 1700 localnet */
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} else if (strncmp(address, "127", 3) == 0) {
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score = -20;
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/* RFC 1918 non-public address space */
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} else if (strncmp(address, "10.", 3) == 0) {
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score = -5;
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/* RFC 1918 non-public address space */
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} else if (strncmp(address, "172", 3) == 0) {
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/* 172.16.0.0 - 172.19.255.255, but not 172.160.0.0 - 172.169.255.255 */
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if (address[4] == '1' && address[5] >= '6' && address[6] == '.') {
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score = -5;
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/* 172.20.0.0 - 172.29.255.255, but not 172.200.0.0 - 172.255.255.255 nor 172.2.0.0 - 172.2.255.255 */
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} else if (address[4] == '2' && address[6] == '.') {
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score = -5;
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/* 172.30.0.0 - 172.31.255.255, but not 172.3.0.0 - 172.3.255.255 */
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} else if (address[4] == '3' && (address[5] == '0' || address[5] == '1')) {
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score = -5;
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/* All other 172 addresses are public */
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} else {
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score = 0;
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}
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/* RFC 2544 Benchmark test range (198.18.0.0 - 198.19.255.255, but not 198.180.0.0 - 198.199.255.255) */
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} else if (strncmp(address, "198.1", 5) == 0 && address[5] >= '8' && address[6] == '.') {
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score = -10;
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/* RFC 1918 non-public address space */
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} else if (strncmp(address, "192.168", 7) == 0) {
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score = -5;
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/* RFC 3330 Zeroconf network */
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} else if (strncmp(address, "169.254", 7) == 0) {
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/*!\note Better score than a test network, but not quite as good as RFC 1918
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* address space. The reason is that some Linux distributions automatically
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* configure a Zeroconf address before trying DHCP, so we want to prefer a
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* DHCP lease to a Zeroconf address.
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*/
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score = -10;
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/* RFC 3330 Test network */
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} else if (strncmp(address, "192.0.2.", 8) == 0) {
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score = -15;
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/* Every other address should be publically routable */
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} else {
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score = 0;
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}
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if (score > *best_score) {
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*best_score = score;
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memcpy(best_addr, &sin->sin_addr, sizeof(*best_addr));
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}
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}
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static int get_local_address(struct ast_sockaddr *ourip)
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{
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int s, res = -1;
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#ifdef SOLARIS
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struct lifreq *ifr = NULL;
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struct lifnum ifn;
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struct lifconf ifc;
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struct sockaddr_in *sa;
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char *buf = NULL;
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int bufsz, x;
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#endif /* SOLARIS */
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#if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__linux__) || defined(__Darwin__) || defined(__GLIBC__)
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struct ifaddrs *ifap, *ifaphead;
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int rtnerr;
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const struct sockaddr_in *sin;
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int best_score = -100;
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#endif /* BSD_OR_LINUX */
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struct in_addr best_addr;
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memset(&best_addr, 0, sizeof(best_addr));
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#if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__linux__) || defined(__Darwin__) || defined(__GLIBC__)
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rtnerr = getifaddrs(&ifaphead);
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if (rtnerr) {
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perror(NULL);
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return -1;
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}
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#endif /* BSD_OR_LINUX */
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s = socket(AF_INET, SOCK_STREAM, 0);
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if (s > 0) {
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#if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__linux__) || defined(__Darwin__) || defined(__GLIBC__)
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for (ifap = ifaphead; ifap; ifap = ifap->ifa_next) {
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if (ifap->ifa_addr && ifap->ifa_addr->sa_family == AF_INET) {
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sin = (const struct sockaddr_in *) ifap->ifa_addr;
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score_address(sin, &best_addr, &best_score);
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res = 0;
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if (best_score == 0) {
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break;
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}
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}
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}
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#endif /* BSD_OR_LINUX */
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/* There is no reason whatsoever that this shouldn't work on Linux or BSD also. */
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#ifdef SOLARIS
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/* Get a count of interfaces on the machine */
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ifn.lifn_family = AF_INET;
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ifn.lifn_flags = 0;
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ifn.lifn_count = 0;
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if (ioctl(s, SIOCGLIFNUM, &ifn) < 0) {
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close(s);
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return -1;
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}
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bufsz = ifn.lifn_count * sizeof(struct lifreq);
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if (!(buf = malloc(bufsz))) {
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close(s);
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return -1;
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}
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memset(buf, 0, bufsz);
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/* Get a list of interfaces on the machine */
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ifc.lifc_len = bufsz;
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ifc.lifc_buf = buf;
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ifc.lifc_family = AF_INET;
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ifc.lifc_flags = 0;
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if (ioctl(s, SIOCGLIFCONF, &ifc) < 0) {
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close(s);
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free(buf);
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return -1;
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}
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for (ifr = ifc.lifc_req, x = 0; x < ifn.lifn_count; ifr++, x++) {
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sa = (struct sockaddr_in *)&(ifr->lifr_addr);
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score_address(sa, &best_addr, &best_score);
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res = 0;
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if (best_score == 0) {
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break;
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}
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}
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free(buf);
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#endif /* SOLARIS */
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close(s);
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}
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#if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__linux__) || defined(__Darwin__)
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freeifaddrs(ifaphead);
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#endif /* BSD_OR_LINUX */
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if (res == 0 && ourip) {
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ast_sockaddr_setnull(ourip);
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ourip->ss.ss_family = AF_INET;
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((struct sockaddr_in *)&ourip->ss)->sin_addr = best_addr;
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}
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return res;
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}
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#endif /* HAVE_GETIFADDRS */
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/* Free HA structure */
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void ast_free_ha(struct ast_ha *ha)
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{
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struct ast_ha *hal;
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while (ha) {
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hal = ha;
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ha = ha->next;
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ast_free(hal);
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}
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}
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/* Copy HA structure */
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void ast_copy_ha(const struct ast_ha *from, struct ast_ha *to)
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{
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ast_sockaddr_copy(&to->addr, &from->addr);
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ast_sockaddr_copy(&to->netmask, &from->netmask);
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to->sense = from->sense;
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}
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/* Create duplicate of ha structure */
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static struct ast_ha *ast_duplicate_ha(struct ast_ha *original)
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{
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struct ast_ha *new_ha;
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if ((new_ha = ast_calloc(1, sizeof(*new_ha)))) {
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/* Copy from original to new object */
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ast_copy_ha(original, new_ha);
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}
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return new_ha;
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}
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/* Create duplicate HA link list */
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/* Used in chan_sip2 templates */
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struct ast_ha *ast_duplicate_ha_list(struct ast_ha *original)
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{
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struct ast_ha *start = original;
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struct ast_ha *ret = NULL;
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struct ast_ha *current, *prev = NULL;
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while (start) {
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current = ast_duplicate_ha(start); /* Create copy of this object */
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if (prev) {
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prev->next = current; /* Link previous to this object */
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}
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if (!ret) {
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ret = current; /* Save starting point */
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}
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start = start->next; /* Go to next object */
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prev = current; /* Save pointer to this object */
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}
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return ret; /* Return start of list */
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}
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/*!
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* \brief
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* Isolate a 32-bit section of an IPv6 address
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*
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* An IPv6 address can be divided into 4 32-bit chunks. This gives
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* easy access to one of these chunks.
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*
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* \param sin6 A pointer to a struct sockaddr_in6
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* \param index Which 32-bit chunk to operate on. Must be in the range 0-3.
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*/
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#define V6_WORD(sin6, index) ((uint32_t *)&((sin6)->sin6_addr))[(index)]
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/*!
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* \brief
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* Apply a netmask to an address and store the result in a separate structure.
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*
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* When dealing with IPv6 addresses, one cannot apply a netmask with a simple
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* logical and operation. Furthermore, the incoming address may be an IPv4 address
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* and need to be mapped properly before attempting to apply a rule.
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*
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* \param addr The IP address to apply the mask to.
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* \param netmask The netmask configured in the host access rule.
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* \param result The resultant address after applying the netmask to the given address
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* \retval 0 Successfully applied netmask
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* \reval -1 Failed to apply netmask
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*/
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static int apply_netmask(const struct ast_sockaddr *addr, const struct ast_sockaddr *netmask,
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struct ast_sockaddr *result)
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{
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int res = 0;
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if (ast_sockaddr_is_ipv4(addr)) {
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struct sockaddr_in result4 = { 0, };
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struct sockaddr_in *addr4 = (struct sockaddr_in *) &addr->ss;
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struct sockaddr_in *mask4 = (struct sockaddr_in *) &netmask->ss;
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result4.sin_family = AF_INET;
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result4.sin_addr.s_addr = addr4->sin_addr.s_addr & mask4->sin_addr.s_addr;
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ast_sockaddr_from_sin(result, &result4);
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} else if (ast_sockaddr_is_ipv6(addr)) {
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struct sockaddr_in6 result6 = { 0, };
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struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) &addr->ss;
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struct sockaddr_in6 *mask6 = (struct sockaddr_in6 *) &netmask->ss;
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int i;
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result6.sin6_family = AF_INET6;
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for (i = 0; i < 4; ++i) {
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V6_WORD(&result6, i) = V6_WORD(addr6, i) & V6_WORD(mask6, i);
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}
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memcpy(&result->ss, &result6, sizeof(result6));
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result->len = sizeof(result6);
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} else {
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/* Unsupported address scheme */
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res = -1;
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}
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return res;
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}
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/*!
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* \brief
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* Parse a netmask in CIDR notation
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*
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* \details
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* For a mask of an IPv4 address, this should be a number between 0 and 32. For
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* a mask of an IPv6 address, this should be a number between 0 and 128. This
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* function creates an IPv6 ast_sockaddr from the given netmask. For masks of
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* IPv4 addresses, this is accomplished by adding 96 to the original netmask.
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*
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* \param[out] addr The ast_sockaddr produced from the CIDR netmask
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* \param is_v4 Tells if the address we are masking is IPv4.
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* \param mask_str The CIDR mask to convert
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* \retval -1 Failure
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* \retval 0 Success
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*/
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static int parse_cidr_mask(struct ast_sockaddr *addr, int is_v4, const char *mask_str)
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{
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int mask;
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if (sscanf(mask_str, "%30d", &mask) != 1) {
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return -1;
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}
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if (is_v4) {
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struct sockaddr_in sin;
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if (mask < 0 || mask > 32) {
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return -1;
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}
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memset(&sin, 0, sizeof(sin));
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sin.sin_family = AF_INET;
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/* If mask is 0, then we already have the
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* appropriate all 0s address in sin from
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* the above memset.
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*/
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if (mask != 0) {
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sin.sin_addr.s_addr = htonl(0xFFFFFFFF << (32 - mask));
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}
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ast_sockaddr_from_sin(addr, &sin);
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} else {
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struct sockaddr_in6 sin6;
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int i;
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if (mask < 0 || mask > 128) {
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return -1;
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}
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memset(&sin6, 0, sizeof(sin6));
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sin6.sin6_family = AF_INET6;
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for (i = 0; i < 4; ++i) {
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/* Once mask reaches 0, we don't have
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* to explicitly set anything anymore
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* since sin6 was zeroed out already
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*/
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if (mask > 0) {
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V6_WORD(&sin6, i) = htonl(0xFFFFFFFF << (mask < 32 ? (32 - mask) : 0));
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mask -= mask < 32 ? mask : 32;
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}
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}
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memcpy(&addr->ss, &sin6, sizeof(sin6));
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addr->len = sizeof(sin6);
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}
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return 0;
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}
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struct ast_ha *ast_append_ha(const char *sense, const char *stuff, struct ast_ha *path, int *error)
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{
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struct ast_ha *ha;
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struct ast_ha *prev = NULL;
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struct ast_ha *ret;
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char *tmp = ast_strdupa(stuff);
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char *address = NULL, *mask = NULL;
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int addr_is_v4;
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ret = path;
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while (path) {
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prev = path;
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path = path->next;
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}
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if (!(ha = ast_calloc(1, sizeof(*ha)))) {
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if (error) {
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*error = 1;
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}
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return ret;
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}
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address = strsep(&tmp, "/");
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if (!address) {
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address = tmp;
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} else {
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mask = tmp;
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}
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if (!ast_sockaddr_parse(&ha->addr, address, PARSE_PORT_FORBID)) {
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ast_log(LOG_WARNING, "Invalid IP address: %s\n", address);
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ast_free_ha(ha);
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if (error) {
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*error = 1;
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}
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return ret;
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}
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/* If someone specifies an IPv4-mapped IPv6 address,
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* we just convert this to an IPv4 ACL
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*/
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if (ast_sockaddr_ipv4_mapped(&ha->addr, &ha->addr)) {
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ast_log(LOG_NOTICE, "IPv4-mapped ACL network address specified. "
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"Converting to an IPv4 ACL network address.\n");
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}
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addr_is_v4 = ast_sockaddr_is_ipv4(&ha->addr);
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if (!mask) {
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parse_cidr_mask(&ha->netmask, addr_is_v4, addr_is_v4 ? "32" : "128");
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} else if (strchr(mask, ':') || strchr(mask, '.')) {
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int mask_is_v4;
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/* Mask is of x.x.x.x or x:x:x:x:x:x:x:x variety */
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if (!ast_sockaddr_parse(&ha->netmask, mask, PARSE_PORT_FORBID)) {
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ast_log(LOG_WARNING, "Invalid netmask: %s\n", mask);
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ast_free_ha(ha);
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if (error) {
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*error = 1;
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}
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return ret;
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}
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/* If someone specifies an IPv4-mapped IPv6 netmask,
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* we just convert this to an IPv4 ACL
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*/
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if (ast_sockaddr_ipv4_mapped(&ha->netmask, &ha->netmask)) {
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ast_log(LOG_NOTICE, "IPv4-mapped ACL netmask specified. "
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"Converting to an IPv4 ACL netmask.\n");
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}
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mask_is_v4 = ast_sockaddr_is_ipv4(&ha->netmask);
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if (addr_is_v4 ^ mask_is_v4) {
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ast_log(LOG_WARNING, "Address and mask are not using same address scheme.\n");
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ast_free_ha(ha);
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if (error) {
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*error = 1;
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}
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return ret;
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}
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} else if (parse_cidr_mask(&ha->netmask, addr_is_v4, mask)) {
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ast_log(LOG_WARNING, "Invalid CIDR netmask: %s\n", mask);
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ast_free_ha(ha);
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if (error) {
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*error = 1;
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}
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return ret;
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}
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if (apply_netmask(&ha->addr, &ha->netmask, &ha->addr)) {
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|
/* This shouldn't happen because ast_sockaddr_parse would
|
|
* have failed much earlier on an unsupported address scheme
|
|
*/
|
|
char *failmask = ast_strdupa(ast_sockaddr_stringify(&ha->netmask));
|
|
char *failaddr = ast_strdupa(ast_sockaddr_stringify(&ha->addr));
|
|
ast_log(LOG_WARNING, "Unable to apply netmask %s to address %s\n", failmask, failaddr);
|
|
ast_free_ha(ha);
|
|
if (error) {
|
|
*error = 1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
ha->sense = strncasecmp(sense, "p", 1) ? AST_SENSE_DENY : AST_SENSE_ALLOW;
|
|
|
|
ha->next = NULL;
|
|
if (prev) {
|
|
prev->next = ha;
|
|
} else {
|
|
ret = ha;
|
|
}
|
|
|
|
{
|
|
const char *addr = ast_strdupa(ast_sockaddr_stringify(&ha->addr));
|
|
const char *mask = ast_strdupa(ast_sockaddr_stringify(&ha->netmask));
|
|
|
|
ast_debug(1, "%s/%s sense %d appended to acl for peer\n", addr, mask, ha->sense);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int ast_apply_ha(const struct ast_ha *ha, const struct ast_sockaddr *addr)
|
|
{
|
|
/* Start optimistic */
|
|
int res = AST_SENSE_ALLOW;
|
|
const struct ast_ha *current_ha;
|
|
|
|
for (current_ha = ha; current_ha; current_ha = current_ha->next) {
|
|
struct ast_sockaddr result;
|
|
struct ast_sockaddr mapped_addr;
|
|
const struct ast_sockaddr *addr_to_use;
|
|
#if 0 /* debugging code */
|
|
char iabuf[INET_ADDRSTRLEN];
|
|
char iabuf2[INET_ADDRSTRLEN];
|
|
/* DEBUG */
|
|
ast_copy_string(iabuf, ast_inet_ntoa(sin->sin_addr), sizeof(iabuf));
|
|
ast_copy_string(iabuf2, ast_inet_ntoa(ha->netaddr), sizeof(iabuf2));
|
|
ast_debug(1, "##### Testing %s with %s\n", iabuf, iabuf2);
|
|
#endif
|
|
if (ast_sockaddr_is_ipv4(&ha->addr)) {
|
|
if (ast_sockaddr_is_ipv6(addr)) {
|
|
if (ast_sockaddr_is_ipv4_mapped(addr)) {
|
|
/* IPv4 ACLs apply to IPv4-mapped addresses */
|
|
if (!ast_sockaddr_ipv4_mapped(addr, &mapped_addr)) {
|
|
ast_log(LOG_ERROR, "%s provided to ast_sockaddr_ipv4_mapped could not be converted. That shouldn't be possible.\n",
|
|
ast_sockaddr_stringify(addr));
|
|
continue;
|
|
}
|
|
addr_to_use = &mapped_addr;
|
|
} else {
|
|
/* An IPv4 ACL does not apply to an IPv6 address */
|
|
continue;
|
|
}
|
|
} else {
|
|
/* Address is IPv4 and ACL is IPv4. No biggie */
|
|
addr_to_use = addr;
|
|
}
|
|
} else {
|
|
if (ast_sockaddr_is_ipv6(addr) && !ast_sockaddr_is_ipv4_mapped(addr)) {
|
|
addr_to_use = addr;
|
|
} else {
|
|
/* Address is IPv4 or IPv4 mapped but ACL is IPv6. Skip */
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* For each rule, if this address and the netmask = the net address
|
|
apply the current rule */
|
|
if (apply_netmask(addr_to_use, ¤t_ha->netmask, &result)) {
|
|
/* Unlikely to happen since we know the address to be IPv4 or IPv6 */
|
|
continue;
|
|
}
|
|
if (!ast_sockaddr_cmp_addr(&result, ¤t_ha->addr)) {
|
|
res = current_ha->sense;
|
|
}
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static int resolve_first(struct ast_sockaddr *addr, const char *name, int flag,
|
|
int family)
|
|
{
|
|
struct ast_sockaddr *addrs;
|
|
int addrs_cnt;
|
|
|
|
addrs_cnt = ast_sockaddr_resolve(&addrs, name, flag, family);
|
|
if (addrs_cnt > 0) {
|
|
if (addrs_cnt > 1) {
|
|
ast_debug(1, "Multiple addresses. Using the first only\n");
|
|
}
|
|
ast_sockaddr_copy(addr, &addrs[0]);
|
|
ast_free(addrs);
|
|
} else {
|
|
ast_log(LOG_WARNING, "Unable to lookup '%s'\n", name);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ast_get_ip_or_srv(struct ast_sockaddr *addr, const char *hostname, const char *service)
|
|
{
|
|
char srv[256];
|
|
char host[256];
|
|
int srv_ret = 0;
|
|
int tportno;
|
|
|
|
if (service) {
|
|
snprintf(srv, sizeof(srv), "%s.%s", service, hostname);
|
|
if ((srv_ret = ast_get_srv(NULL, host, sizeof(host), &tportno, srv)) > 0) {
|
|
hostname = host;
|
|
}
|
|
}
|
|
|
|
if (resolve_first(addr, hostname, PARSE_PORT_FORBID, addr->ss.ss_family) != 0) {
|
|
return -1;
|
|
}
|
|
|
|
if (srv_ret > 0) {
|
|
ast_sockaddr_set_port(addr, tportno);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct dscp_codepoint {
|
|
char *name;
|
|
unsigned int space;
|
|
};
|
|
|
|
/* IANA registered DSCP codepoints */
|
|
|
|
static const struct dscp_codepoint dscp_pool1[] = {
|
|
{ "CS0", 0x00 },
|
|
{ "CS1", 0x08 },
|
|
{ "CS2", 0x10 },
|
|
{ "CS3", 0x18 },
|
|
{ "CS4", 0x20 },
|
|
{ "CS5", 0x28 },
|
|
{ "CS6", 0x30 },
|
|
{ "CS7", 0x38 },
|
|
{ "AF11", 0x0A },
|
|
{ "AF12", 0x0C },
|
|
{ "AF13", 0x0E },
|
|
{ "AF21", 0x12 },
|
|
{ "AF22", 0x14 },
|
|
{ "AF23", 0x16 },
|
|
{ "AF31", 0x1A },
|
|
{ "AF32", 0x1C },
|
|
{ "AF33", 0x1E },
|
|
{ "AF41", 0x22 },
|
|
{ "AF42", 0x24 },
|
|
{ "AF43", 0x26 },
|
|
{ "EF", 0x2E },
|
|
};
|
|
|
|
int ast_str2cos(const char *value, unsigned int *cos)
|
|
{
|
|
int fval;
|
|
|
|
if (sscanf(value, "%30d", &fval) == 1) {
|
|
if (fval < 8) {
|
|
*cos = fval;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
int ast_str2tos(const char *value, unsigned int *tos)
|
|
{
|
|
int fval;
|
|
unsigned int x;
|
|
|
|
if (sscanf(value, "%30i", &fval) == 1) {
|
|
*tos = fval & 0xFF;
|
|
return 0;
|
|
}
|
|
|
|
for (x = 0; x < ARRAY_LEN(dscp_pool1); x++) {
|
|
if (!strcasecmp(value, dscp_pool1[x].name)) {
|
|
*tos = dscp_pool1[x].space << 2;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
const char *ast_tos2str(unsigned int tos)
|
|
{
|
|
unsigned int x;
|
|
|
|
for (x = 0; x < ARRAY_LEN(dscp_pool1); x++) {
|
|
if (dscp_pool1[x].space == (tos >> 2)) {
|
|
return dscp_pool1[x].name;
|
|
}
|
|
}
|
|
|
|
return "unknown";
|
|
}
|
|
|
|
int ast_get_ip(struct ast_sockaddr *addr, const char *hostname)
|
|
{
|
|
return ast_get_ip_or_srv(addr, hostname, NULL);
|
|
}
|
|
|
|
int ast_ouraddrfor(const struct ast_sockaddr *them, struct ast_sockaddr *us)
|
|
{
|
|
int port;
|
|
int s;
|
|
|
|
port = ast_sockaddr_port(us);
|
|
|
|
if ((s = socket(ast_sockaddr_is_ipv6(them) ? AF_INET6 : AF_INET,
|
|
SOCK_DGRAM, 0)) < 0) {
|
|
ast_log(LOG_ERROR, "Cannot create socket\n");
|
|
return -1;
|
|
}
|
|
|
|
if (ast_connect(s, them)) {
|
|
ast_log(LOG_WARNING, "Cannot connect\n");
|
|
close(s);
|
|
return -1;
|
|
}
|
|
if (ast_getsockname(s, us)) {
|
|
|
|
ast_log(LOG_WARNING, "Cannot get socket name\n");
|
|
close(s);
|
|
return -1;
|
|
}
|
|
close(s);
|
|
|
|
{
|
|
const char *them_addr = ast_strdupa(ast_sockaddr_stringify_addr(them));
|
|
const char *us_addr = ast_strdupa(ast_sockaddr_stringify_addr(us));
|
|
|
|
ast_debug(3, "For destination '%s', our source address is '%s'.\n",
|
|
them_addr, us_addr);
|
|
}
|
|
|
|
ast_sockaddr_set_port(us, port);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ast_find_ourip(struct ast_sockaddr *ourip, const struct ast_sockaddr *bindaddr, int family)
|
|
{
|
|
char ourhost[MAXHOSTNAMELEN] = "";
|
|
struct ast_sockaddr root;
|
|
int res, port = ast_sockaddr_port(ourip);
|
|
|
|
/* just use the bind address if it is nonzero */
|
|
if (!ast_sockaddr_is_any(bindaddr)) {
|
|
ast_sockaddr_copy(ourip, bindaddr);
|
|
ast_debug(3, "Attached to given IP address\n");
|
|
return 0;
|
|
}
|
|
/* try to use our hostname */
|
|
if (gethostname(ourhost, sizeof(ourhost) - 1)) {
|
|
ast_log(LOG_WARNING, "Unable to get hostname\n");
|
|
} else {
|
|
if (resolve_first(ourip, ourhost, PARSE_PORT_FORBID, family) == 0) {
|
|
/* reset port since resolve_first wipes this out */
|
|
ast_sockaddr_set_port(ourip, port);
|
|
return 0;
|
|
}
|
|
}
|
|
ast_debug(3, "Trying to check A.ROOT-SERVERS.NET and get our IP address for that connection\n");
|
|
/* A.ROOT-SERVERS.NET. */
|
|
if (!resolve_first(&root, "A.ROOT-SERVERS.NET", PARSE_PORT_FORBID, 0) &&
|
|
!ast_ouraddrfor(&root, ourip)) {
|
|
/* reset port since resolve_first wipes this out */
|
|
ast_sockaddr_set_port(ourip, port);
|
|
return 0;
|
|
}
|
|
res = get_local_address(ourip);
|
|
ast_sockaddr_set_port(ourip, port);
|
|
return res;
|
|
}
|
|
|