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 err = getaddrinfo(address, service, &hint, &ai);
45 logger(DEBUG_ALWAYS, LOG_WARNING, "Error looking up %s port %s: %s", address, service, err == EAI_SYSTEM ? strerror(errno) : gai_strerror(err));
52 sockaddr_t str2sockaddr(const char *address, const char *port) {
53 struct addrinfo *ai, hint = {0};
54 sockaddr_t result = {{0}};
57 hint.ai_family = AF_UNSPEC;
58 hint.ai_flags = AI_NUMERICHOST;
59 hint.ai_socktype = SOCK_STREAM;
61 err = getaddrinfo(address, port, &hint, &ai);
64 logger(DEBUG_SCARY_THINGS, LOG_DEBUG, "Unknown type address %s port %s", address, port);
65 result.sa.sa_family = AF_UNKNOWN;
66 result.unknown.address = xstrdup(address);
67 result.unknown.port = xstrdup(port);
71 memcpy(&result, ai->ai_addr, ai->ai_addrlen);
77 void sockaddr2str(const sockaddr_t *sa, char **addrstr, char **portstr) {
78 char address[NI_MAXHOST];
79 char port[NI_MAXSERV];
83 if(sa->sa.sa_family == AF_UNKNOWN) {
85 *addrstr = xstrdup(sa->unknown.address);
87 *portstr = xstrdup(sa->unknown.port);
91 err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof address, port, sizeof port, NI_NUMERICHOST | NI_NUMERICSERV);
94 logger(DEBUG_ALWAYS, LOG_ERR, "Error while translating addresses: %s", err == EAI_SYSTEM ? strerror(errno) : gai_strerror(err));
98 scopeid = strchr(address, '%');
101 *scopeid = '\0'; /* Descope. */
104 *addrstr = xstrdup(address);
106 *portstr = xstrdup(port);
109 char *sockaddr2hostname(const sockaddr_t *sa) {
111 char address[NI_MAXHOST] = "unknown";
112 char port[NI_MAXSERV] = "unknown";
115 if(sa->sa.sa_family == AF_UNKNOWN) {
116 xasprintf(&str, "%s port %s", sa->unknown.address, sa->unknown.port);
120 err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof address, port, sizeof port,
121 hostnames ? 0 : (NI_NUMERICHOST | NI_NUMERICSERV));
123 logger(DEBUG_ALWAYS, LOG_ERR, "Error while looking up hostname: %s", err == EAI_SYSTEM ? strerror(errno) : gai_strerror(err));
126 xasprintf(&str, "%s port %s", address, port);
131 int sockaddrcmp_noport(const sockaddr_t *a, const sockaddr_t *b) {
134 result = a->sa.sa_family - b->sa.sa_family;
139 switch (a->sa.sa_family) {
144 return strcmp(a->unknown.address, b->unknown.address);
147 return memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a->in.sin_addr));
150 return memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr));
153 logger(DEBUG_ALWAYS, LOG_ERR, "sockaddrcmp() was called with unknown address family %d, exitting!",
159 int sockaddrcmp(const sockaddr_t *a, const sockaddr_t *b) {
162 result = a->sa.sa_family - b->sa.sa_family;
167 switch (a->sa.sa_family) {
172 result = strcmp(a->unknown.address, b->unknown.address);
177 return strcmp(a->unknown.port, b->unknown.port);
180 result = memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof a->in.sin_addr);
185 return memcmp(&a->in.sin_port, &b->in.sin_port, sizeof a->in.sin_port);
188 result = memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof a->in6.sin6_addr);
193 return memcmp(&a->in6.sin6_port, &b->in6.sin6_port, sizeof a->in6.sin6_port);
196 logger(DEBUG_ALWAYS, LOG_ERR, "sockaddrcmp() was called with unknown address family %d, exitting!",
202 void sockaddrcpy(sockaddr_t *a, const sockaddr_t *b) {
203 if(b->sa.sa_family != AF_UNKNOWN) {
206 a->unknown.family = AF_UNKNOWN;
207 a->unknown.address = xstrdup(b->unknown.address);
208 a->unknown.port = xstrdup(b->unknown.port);
212 void sockaddrfree(sockaddr_t *a) {
213 if(a->sa.sa_family == AF_UNKNOWN) {
214 free(a->unknown.address);
215 free(a->unknown.port);
219 void sockaddrunmap(sockaddr_t *sa) {
220 if(sa->sa.sa_family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&sa->in6.sin6_addr)) {
221 sa->in.sin_addr.s_addr = ((uint32_t *) & sa->in6.sin6_addr)[3];
222 sa->in.sin_family = AF_INET;