2 netutl.c -- some supporting network utility code
3 Copyright (C) 1998-2005 Ivo Timmermans
4 2000-2013 Guus Sliepen <guus@tinc-vpn.org>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License along
17 with this program; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
29 bool hostnames = false;
32 Turn a string into a struct addrinfo.
33 Return NULL on failure.
35 struct addrinfo *str2addrinfo(const char *address, const char *service, int socktype) {
36 struct addrinfo *ai, hint = {0};
39 hint.ai_family = addressfamily;
40 hint.ai_socktype = socktype;
42 #if HAVE_DECL_RES_INIT
45 err = getaddrinfo(address, service, &hint, &ai);
48 logger(DEBUG_ALWAYS, LOG_WARNING, "Error looking up %s port %s: %s", address, service, err == EAI_SYSTEM ? strerror(errno) : gai_strerror(err));
55 sockaddr_t str2sockaddr(const char *address, const char *port) {
56 struct addrinfo *ai, hint = {0};
57 sockaddr_t result = {{0}};
60 hint.ai_family = AF_UNSPEC;
61 hint.ai_flags = AI_NUMERICHOST;
62 hint.ai_socktype = SOCK_STREAM;
64 err = getaddrinfo(address, port, &hint, &ai);
67 logger(DEBUG_SCARY_THINGS, LOG_DEBUG, "Unknown type address %s port %s", address, port);
68 result.sa.sa_family = AF_UNKNOWN;
69 result.unknown.address = xstrdup(address);
70 result.unknown.port = xstrdup(port);
74 memcpy(&result, ai->ai_addr, ai->ai_addrlen);
80 void sockaddr2str(const sockaddr_t *sa, char **addrstr, char **portstr) {
81 char address[NI_MAXHOST];
82 char port[NI_MAXSERV];
86 if(sa->sa.sa_family == AF_UNSPEC) {
88 *addrstr = xstrdup("unspec");
90 *portstr = xstrdup("unspec");
92 } else if(sa->sa.sa_family == AF_UNKNOWN) {
94 *addrstr = xstrdup(sa->unknown.address);
96 *portstr = xstrdup(sa->unknown.port);
100 err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof address, port, sizeof port, NI_NUMERICHOST | NI_NUMERICSERV);
103 logger(DEBUG_ALWAYS, LOG_ERR, "Error while translating addresses: %s", err == EAI_SYSTEM ? strerror(errno) : gai_strerror(err));
107 scopeid = strchr(address, '%');
110 *scopeid = '\0'; /* Descope. */
113 *addrstr = xstrdup(address);
115 *portstr = xstrdup(port);
118 char *sockaddr2hostname(const sockaddr_t *sa) {
120 char address[NI_MAXHOST] = "unknown";
121 char port[NI_MAXSERV] = "unknown";
124 if(sa->sa.sa_family == AF_UNSPEC) {
125 xasprintf(&str, "unspec port unspec");
127 } else if(sa->sa.sa_family == AF_UNKNOWN) {
128 xasprintf(&str, "%s port %s", sa->unknown.address, sa->unknown.port);
132 err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof address, port, sizeof port,
133 hostnames ? 0 : (NI_NUMERICHOST | NI_NUMERICSERV));
135 logger(DEBUG_ALWAYS, LOG_ERR, "Error while looking up hostname: %s", err == EAI_SYSTEM ? strerror(errno) : gai_strerror(err));
138 xasprintf(&str, "%s port %s", address, port);
143 int sockaddrcmp_noport(const sockaddr_t *a, const sockaddr_t *b) {
146 result = a->sa.sa_family - b->sa.sa_family;
151 switch (a->sa.sa_family) {
156 return strcmp(a->unknown.address, b->unknown.address);
159 return memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a->in.sin_addr));
162 return memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr));
165 logger(DEBUG_ALWAYS, LOG_ERR, "sockaddrcmp() was called with unknown address family %d, exitting!",
171 int sockaddrcmp(const sockaddr_t *a, const sockaddr_t *b) {
174 result = a->sa.sa_family - b->sa.sa_family;
179 switch (a->sa.sa_family) {
184 result = strcmp(a->unknown.address, b->unknown.address);
189 return strcmp(a->unknown.port, b->unknown.port);
192 result = memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof a->in.sin_addr);
197 return memcmp(&a->in.sin_port, &b->in.sin_port, sizeof a->in.sin_port);
200 result = memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof a->in6.sin6_addr);
205 return memcmp(&a->in6.sin6_port, &b->in6.sin6_port, sizeof a->in6.sin6_port);
208 logger(DEBUG_ALWAYS, LOG_ERR, "sockaddrcmp() was called with unknown address family %d, exitting!",
214 void sockaddrcpy(sockaddr_t *a, const sockaddr_t *b) {
215 if(b->sa.sa_family != AF_UNKNOWN) {
218 a->unknown.family = AF_UNKNOWN;
219 a->unknown.address = xstrdup(b->unknown.address);
220 a->unknown.port = xstrdup(b->unknown.port);
224 void sockaddrfree(sockaddr_t *a) {
225 if(a->sa.sa_family == AF_UNKNOWN) {
226 free(a->unknown.address);
227 free(a->unknown.port);
231 void sockaddrunmap(sockaddr_t *sa) {
232 if(sa->sa.sa_family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&sa->in6.sin6_addr)) {
233 sa->in.sin_addr.s_addr = ((uint32_t *) & sa->in6.sin6_addr)[3];
234 sa->in.sin_family = AF_INET;