2 netutl.c -- some supporting network utility code
3 Copyright (C) 1998-2005 Ivo Timmermans
4 2000-2006 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
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
31 bool hostnames = false;
34 Turn a string into a struct addrinfo.
35 Return NULL on failure.
37 struct addrinfo *str2addrinfo(const char *address, const char *service, int socktype) {
38 struct addrinfo *ai, hint = {0};
43 hint.ai_family = addressfamily;
44 hint.ai_socktype = socktype;
46 err = getaddrinfo(address, service, &hint, &ai);
49 logger(LOG_WARNING, _("Error looking up %s port %s: %s"), address,
50 service, gai_strerror(err));
57 sockaddr_t str2sockaddr(const char *address, const char *port) {
58 struct addrinfo *ai, hint = {0};
64 hint.ai_family = AF_UNSPEC;
65 hint.ai_flags = AI_NUMERICHOST;
66 hint.ai_socktype = SOCK_STREAM;
68 err = getaddrinfo(address, port, &hint, &ai);
72 logger(LOG_DEBUG, "Unknown type address %s port %s", address, port);
73 result.sa.sa_family = AF_UNKNOWN;
74 result.unknown.address = xstrdup(address);
75 result.unknown.port = xstrdup(port);
79 memcpy(&result, ai->ai_addr, ai->ai_addrlen);
85 void sockaddr2str(const sockaddr_t *sa, char **addrstr, char **portstr) {
86 char address[NI_MAXHOST];
87 char port[NI_MAXSERV];
93 if(sa->sa.sa_family == AF_UNKNOWN) {
94 *addrstr = xstrdup(sa->unknown.address);
95 *portstr = xstrdup(sa->unknown.port);
99 err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof address, port, sizeof port, NI_NUMERICHOST | NI_NUMERICSERV);
102 logger(LOG_ERR, _("Error while translating addresses: %s"),
109 scopeid = strchr(address, '%');
112 *scopeid = '\0'; /* Descope. */
114 *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";
126 if(sa->sa.sa_family == AF_UNKNOWN) {
127 asprintf(&str, _("%s port %s"), sa->unknown.address, sa->unknown.port);
131 err = getnameinfo(&sa->sa, SALEN(sa->sa), address, sizeof address, port, sizeof port,
132 hostnames ? 0 : (NI_NUMERICHOST | NI_NUMERICSERV));
134 logger(LOG_ERR, _("Error while looking up hostname: %s"),
138 asprintf(&str, _("%s port %s"), address, port);
143 int sockaddrcmp(const sockaddr_t *a, const sockaddr_t *b) {
148 result = a->sa.sa_family - b->sa.sa_family;
153 switch (a->sa.sa_family) {
158 result = strcmp(a->unknown.address, b->unknown.address);
163 return strcmp(a->unknown.port, b->unknown.port);
166 result = memcmp(&a->in.sin_addr, &b->in.sin_addr, sizeof a->in.sin_addr);
171 return memcmp(&a->in.sin_port, &b->in.sin_port, sizeof a->in.sin_port);
174 result = memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof a->in6.sin6_addr);
179 return memcmp(&a->in6.sin6_port, &b->in6.sin6_port, sizeof a->in6.sin6_port);
182 logger(LOG_ERR, _("sockaddrcmp() was called with unknown address family %d, exitting!"),
190 void sockaddrcpy(sockaddr_t *a, const sockaddr_t *b) {
193 if(b->sa.sa_family != AF_UNKNOWN) {
196 a->unknown.family = AF_UNKNOWN;
197 a->unknown.address = xstrdup(b->unknown.address);
198 a->unknown.port = xstrdup(b->unknown.port);
202 void sockaddrfree(sockaddr_t *a) {
205 if(a->sa.sa_family == AF_UNKNOWN) {
206 free(a->unknown.address);
207 free(a->unknown.port);
211 void sockaddrunmap(sockaddr_t *sa) {
214 if(sa->sa.sa_family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&sa->in6.sin6_addr)) {
215 sa->in.sin_addr.s_addr = ((uint32_t *) & sa->in6.sin6_addr)[3];
216 sa->in.sin_family = AF_INET;
220 /* Subnet mask handling */
222 int maskcmp(const void *va, const void *vb, int masklen) {
229 for(m = masklen, i = 0; m >= 8; m -= 8, i++) {
230 result = a[i] - b[i];
236 return (a[i] & (0x100 - (1 << (8 - m)))) -
237 (b[i] & (0x100 - (1 << (8 - m))));
242 void mask(void *va, int masklen, int len) {
252 a[i++] &= (0x100 - (1 << (8 - masklen)));
258 void maskcpy(void *va, const void *vb, int masklen, int len) {
265 for(m = masklen, i = 0; m >= 8; m -= 8, i++)
269 a[i] = b[i] & (0x100 - (1 << (8 - m)));
277 bool maskcheck(const void *va, int masklen, int len) {
286 if(masklen && a[i++] & (0xff >> masklen))