2 netutl.c -- some supporting network utility code
3 Copyright (C) 2014-2017 Guus Sliepen <guus@meshlink.io>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
28 bool hostnames = false;
31 Turn a string into a struct addrinfo.
32 Return NULL on failure.
34 struct addrinfo *str2addrinfo(const char *address, const char *service, int socktype) {
35 struct addrinfo *ai, hint = {};
38 hint.ai_family = addressfamily;
39 hint.ai_socktype = socktype;
41 err = getaddrinfo(address, service, &hint, &ai);
44 logger(NULL, MESHLINK_WARNING, "Error looking up %s port %s: %s", address, service, err == EAI_SYSTEM ? strerror(errno) : gai_strerror(err));
51 sockaddr_t str2sockaddr(const char *address, const char *port) {
52 struct addrinfo *ai, hint = {};
53 sockaddr_t result = {};
56 hint.ai_family = AF_UNSPEC;
57 hint.ai_flags = AI_NUMERICHOST;
58 hint.ai_socktype = SOCK_STREAM;
60 err = getaddrinfo(address, port, &hint, &ai);
63 logger(NULL, MESHLINK_DEBUG, "Unknown type address %s port %s", address, port);
64 result.sa.sa_family = AF_UNKNOWN;
65 result.unknown.address = xstrdup(address);
66 result.unknown.port = xstrdup(port);
70 memcpy(&result, ai->ai_addr, ai->ai_addrlen);
76 void sockaddr2str(const sockaddr_t *sa, char **addrstr, char **portstr) {
77 char address[NI_MAXHOST];
78 char port[NI_MAXSERV];
82 if(sa->sa.sa_family == AF_UNKNOWN) {
84 *addrstr = xstrdup(sa->unknown.address);
88 *portstr = xstrdup(sa->unknown.port);
94 err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port), NI_NUMERICHOST | NI_NUMERICSERV);
97 logger(NULL, MESHLINK_ERROR, "Error while translating addresses: %s", err == EAI_SYSTEM ? strerror(errno) : gai_strerror(err));
101 scopeid = strchr(address, '%');
104 *scopeid = '\0'; /* Descope. */
108 *addrstr = xstrdup(address);
112 *portstr = xstrdup(port);
116 char *sockaddr2hostname(const sockaddr_t *sa) {
118 char address[NI_MAXHOST] = "unknown";
119 char port[NI_MAXSERV] = "unknown";
122 if(sa->sa.sa_family == AF_UNKNOWN) {
123 xasprintf(&str, "%s port %s", sa->unknown.address, sa->unknown.port);
127 err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof(address), port, sizeof(port),
128 hostnames ? 0 : (NI_NUMERICHOST | NI_NUMERICSERV));
131 logger(NULL, MESHLINK_ERROR, "Error while looking up hostname: %s", err == EAI_SYSTEM ? strerror(errno) : gai_strerror(err));
134 xasprintf(&str, "%s port %s", address, port);
139 int sockaddrcmp_noport(const sockaddr_t *a, const sockaddr_t *b) {
142 result = a->sa.sa_family - b->sa.sa_family;
148 switch(a->sa.sa_family) {
153 return strcmp(a->unknown.address, b->unknown.address);
156 return memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof(a->in.sin_addr));
159 return memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr));
162 logger(NULL, MESHLINK_ERROR, "sockaddrcmp() was called with unknown address family %d, exitting!",
168 int sockaddrcmp(const sockaddr_t *a, const sockaddr_t *b) {
171 result = a->sa.sa_family - b->sa.sa_family;
177 switch(a->sa.sa_family) {
182 result = strcmp(a->unknown.address, b->unknown.address);
188 return strcmp(a->unknown.port, b->unknown.port);
191 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);
206 return memcmp(&a->in6.sin6_port, &b->in6.sin6_port, sizeof(a)->in6.sin6_port);
209 logger(NULL, MESHLINK_ERROR, "sockaddrcmp() was called with unknown address family %d, exitting!",
215 void sockaddrcpy(sockaddr_t *a, const sockaddr_t *b) {
216 if(b->sa.sa_family != AF_UNKNOWN) {
219 a->unknown.family = AF_UNKNOWN;
220 a->unknown.address = xstrdup(b->unknown.address);
221 a->unknown.port = xstrdup(b->unknown.port);
225 void sockaddrfree(sockaddr_t *a) {
226 if(a->sa.sa_family == AF_UNKNOWN) {
227 free(a->unknown.address);
228 free(a->unknown.port);
232 void sockaddrunmap(sockaddr_t *sa) {
233 if(sa->sa.sa_family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&sa->in6.sin6_addr)) {
234 sa->in.sin_addr.s_addr = ((uint32_t *) & sa->in6.sin6_addr)[3];
235 sa->in.sin_family = AF_INET;