5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2007 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; version 2 of the License.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
23 /* Returns bound port from listener */
25 SilcUInt16 *silc_net_listener_get_port(SilcNetListener listener,
26 SilcUInt32 *port_count)
31 ports = silc_calloc(listener->socks_count, sizeof(*ports));
35 for (i = 0; i < listener->socks_count; i++)
36 ports[i] = silc_net_get_local_port(listener->socks[i]);
39 *port_count = listener->socks_count;
44 /* Return bound IP from listener */
46 char **silc_net_listener_get_ip(SilcNetListener listener,
49 char **ips = NULL, *ip;
52 ips = silc_calloc(listener->socks_count, sizeof(*ips));
56 for (i = 0, k = 0; i < listener->socks_count; i++) {
57 if (silc_net_check_local_by_sock(listener->socks[i], NULL, &ip))
67 /* Return bound hostname from listener */
69 char **silc_net_listener_get_hostname(SilcNetListener listener,
70 SilcUInt32 *hostname_count)
75 hs = silc_calloc(listener->socks_count, sizeof(*hs));
79 for (i = 0, k = 0; i < listener->socks_count; i++) {
80 if (silc_net_check_local_by_sock(listener->socks[i], &h, NULL))
90 /* Accepts a connection from a particular socket */
92 int silc_net_accept_connection(int sock)
94 int ret = accept(sock, 0, 0);
96 silc_set_errno_posix(errno);
99 /* Sets a option for a socket. */
101 int silc_net_set_socket_opt(int sock, int level, int option, int on)
103 int ret = setsockopt(sock, level, option, (void *)&on, sizeof(on));
105 silc_set_errno_posix(errno);
108 /* Get socket options */
110 int silc_net_get_socket_opt(int sock, int level, int option,
111 void *optval, int *opt_len)
113 int ret = getsockopt(sock, level, option, optval, opt_len);
115 silc_set_errno_posix(errno);
118 /* Checks whether IP address sent as argument is valid IPv4 address. */
120 SilcBool silc_net_is_ip4(const char *addr)
125 if (*addr != '.' && !isdigit((int)*addr))
138 /* Checks whether IP address sent as argument is valid IPv6 address. */
140 SilcBool silc_net_is_ip6(const char *addr)
142 /* XXX does this work with all kinds of IPv6 addresses? */
144 if (*addr != ':' && !isxdigit((int)*addr))
152 /* Checks whether IP address sent as argument is valid IP address. */
154 SilcBool silc_net_is_ip(const char *addr)
156 if (silc_net_is_ip4(addr))
158 return silc_net_is_ip6(addr);
161 /* Internal context for async resolving */
163 SilcNetResolveCallback completion;
165 SilcBool prefer_ipv6;
166 SilcSchedule schedule;
169 } *SilcNetResolveContext;
171 SILC_TASK_CALLBACK(silc_net_resolve_completion)
173 SilcNetResolveContext r = (SilcNetResolveContext)context;
175 /* Call the completion callback */
177 (*r->completion)(r->result, r->context);
180 silc_free(r->result);
184 /* Thread function to resolve the address for hostname. */
186 static void *silc_net_gethostbyname_thread(void *context)
188 SilcNetResolveContext r = (SilcNetResolveContext)context;
189 SilcSchedule schedule = r->schedule;
192 if (silc_net_gethostbyname(r->input, r->prefer_ipv6, tmp, sizeof(tmp)))
193 r->result = silc_strdup(tmp);
195 silc_schedule_task_add(schedule, 0, silc_net_resolve_completion, r, 0, 1,
197 silc_schedule_wakeup(schedule);
201 /* Thread function to resolve the hostname for address. */
203 static void *silc_net_gethostbyaddr_thread(void *context)
205 SilcNetResolveContext r = (SilcNetResolveContext)context;
206 SilcSchedule schedule = r->schedule;
209 if (silc_net_gethostbyaddr(r->input, tmp, sizeof(tmp)))
210 r->result = silc_strdup(tmp);
212 silc_schedule_task_add(schedule, 0, silc_net_resolve_completion, r, 0, 1,
214 silc_schedule_wakeup(schedule);
218 /* Resolves IP address for hostname. */
220 SilcBool silc_net_gethostbyname(const char *name,
221 SilcBool prefer_ipv6, char *address,
222 SilcUInt32 address_len)
225 struct addrinfo hints, *ai, *tmp, *ip4 = NULL, *ip6 = NULL;
227 memset(&hints, 0, sizeof(hints));
228 hints.ai_socktype = SOCK_STREAM;
229 if (getaddrinfo(name, NULL, &hints, &ai))
232 for (tmp = ai; tmp; tmp = tmp->ai_next) {
233 if (tmp->ai_family == AF_INET6) {
239 if (tmp->ai_family == AF_INET) {
247 tmp = (prefer_ipv6 ? (ip6 ? ip6 : ip4) : (ip4 ? ip4 : ip6));
253 if (getnameinfo(tmp->ai_addr, tmp->ai_addrlen, address,
254 address_len, NULL, 0, NI_NUMERICHOST)) {
265 if (silc_net_is_ip4(name)) {
266 memset(address, 0, address_len);
267 if (address_len < strlen(name))
269 strncpy(address, name, strlen(name));
273 hp = gethostbyname(name);
277 memcpy(&ip.s_addr, hp->h_addr_list[0], 4);
281 if (address_len < strlen(tmp))
283 memset(address, 0, address_len);
284 strncpy(address, tmp, strlen(tmp));
290 /* Resolves IP address for hostname async. */
292 void silc_net_gethostbyname_async(const char *name,
293 SilcBool prefer_ipv6,
294 SilcSchedule schedule,
295 SilcNetResolveCallback completion,
298 SilcNetResolveContext r = silc_calloc(1, sizeof(*r));
300 r->completion = completion;
301 r->context = context;
302 r->prefer_ipv6 = prefer_ipv6;
303 r->schedule = schedule;
304 r->input = silc_strdup(name);
306 silc_thread_create(silc_net_gethostbyname_thread, r, FALSE);
309 /* Resolves hostname by IP address. */
311 SilcBool silc_net_gethostbyaddr(const char *addr, char *name,
315 struct addrinfo req, *ai;
317 memset(&req, 0, sizeof(req));
318 req.ai_socktype = SOCK_STREAM;
319 req.ai_flags = AI_CANONNAME;
321 if (getaddrinfo(addr, NULL, &req, &ai))
323 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, name, name_len, NULL, 0, 0)) {
332 if (!silc_net_addr2bin(addr, a, sizeof(a)))
335 hp = gethostbyaddr(a, 4, AF_INET);
338 if (name_len < strlen(hp->h_name))
340 memset(name, 0, name_len);
341 strncpy(name, hp->h_name, strlen(hp->h_name));
347 /* Resolves hostname by IP address async. */
349 void silc_net_gethostbyaddr_async(const char *addr,
350 SilcSchedule schedule,
351 SilcNetResolveCallback completion,
354 SilcNetResolveContext r = silc_calloc(1, sizeof(*r));
356 r->completion = completion;
357 r->context = context;
358 r->schedule = schedule;
359 r->input = silc_strdup(addr);
361 silc_thread_create(silc_net_gethostbyaddr_thread, r, FALSE);
366 /* Performs lookups for remote name and IP address. This peforms reverse
367 lookup as well to verify that the IP has FQDN. */
369 SilcBool silc_net_check_host_by_sock(SilcSocket sock, char **hostname,
376 struct sockaddr_storage remote;
383 SILC_LOG_DEBUG(("Resolving remote hostname and IP address"));
385 memset(&remote, 0, sizeof(remote));
386 memset(&s, 0, sizeof(s));
387 len = sizeof(remote);
388 rval = getpeername(sock, (struct sockaddr *)&remote, &len);
392 if (getnameinfo((struct sockaddr *)&remote, len, s, sizeof(s), NULL, 0,
396 *ip = silc_memdup(s, strlen(s));
400 struct sockaddr_in remote;
407 SILC_LOG_DEBUG(("Resolving remote hostname and IP address"));
409 memset(&remote, 0, sizeof(remote));
410 len = sizeof(remote);
411 rval = getpeername(sock, (struct sockaddr *)&remote, &len);
415 host_ip = inet_ntoa(remote.sin_addr);
419 *ip = silc_memdup(host_ip, strlen(host_ip));
424 /* Do reverse lookup if we want hostname too. */
426 /* Get host by address */
427 if (!silc_net_gethostbyaddr(*ip, host, sizeof(host)))
430 *hostname = silc_memdup(host, strlen(host));
431 SILC_LOG_DEBUG(("Resolved hostname `%s'", *hostname));
434 if (!silc_net_gethostbyname(*hostname, TRUE, host, sizeof(host)))
437 if (strcmp(*ip, host))
441 SILC_LOG_DEBUG(("Resolved IP address `%s'", *ip));
445 /* Performs lookups for local name and IP address. This peforms reverse
446 lookup as well to verify that the IP has FQDN. */
448 SilcBool silc_net_check_local_by_sock(SilcSocket sock, char **hostname,
455 struct sockaddr_storage local;
462 SILC_LOG_DEBUG(("Resolving local hostname and IP address"));
464 memset(&local, 0, sizeof(local));
465 memset(&s, 0, sizeof(s));
467 rval = getsockname(sock, (struct sockaddr *)&local, &len);
471 if (getnameinfo((struct sockaddr *)&local, len, s, sizeof(s), NULL, 0,
475 *ip = silc_memdup(s, strlen(s));
479 struct sockaddr_in local;
486 SILC_LOG_DEBUG(("Resolving local hostname and IP address"));
488 memset(&local, 0, sizeof(local));
490 rval = getsockname(sock, (struct sockaddr *)&local, &len);
494 host_ip = inet_ntoa(local.sin_addr);
498 *ip = silc_memdup(host_ip, strlen(host_ip));
503 /* Do reverse lookup if we want hostname too. */
505 /* Get host by address */
506 if (!silc_net_gethostbyaddr(*ip, host, sizeof(host)))
509 *hostname = silc_memdup(host, strlen(host));
510 SILC_LOG_DEBUG(("Resolved hostname `%s'", *hostname));
513 if (!silc_net_gethostbyname(*hostname, TRUE, host, sizeof(host)))
516 if (strcmp(*ip, host))
520 SILC_LOG_DEBUG(("Resolved IP address `%s'", *ip));
524 /* Return remote port by socket. */
526 SilcUInt16 silc_net_get_remote_port(SilcSocket sock)
529 struct sockaddr_storage remote;
533 memset(&remote, 0, sizeof(remote));
534 len = sizeof(remote);
535 if (getpeername(sock, (struct sockaddr *)&remote, &len) < 0)
538 if (getnameinfo((struct sockaddr *)&remote, len, NULL, 0, s, sizeof(s),
544 struct sockaddr_in remote;
547 memset(&remote, 0, sizeof(remote));
548 len = sizeof(remote);
549 if (getpeername(sock, (struct sockaddr *)&remote, &len) < 0)
552 return ntohs(remote.sin_port);
556 /* Return local port by socket. */
558 SilcUInt16 silc_net_get_local_port(SilcSocket sock)
561 struct sockaddr_storage local;
565 memset(&local, 0, sizeof(local));
567 if (getsockname(sock, (struct sockaddr *)&local, &len) < 0)
570 if (getnameinfo((struct sockaddr *)&local, len, NULL, 0, s, sizeof(s),
576 struct sockaddr_in local;
579 memset(&local, 0, sizeof(local));
581 if (getsockname(sock, (struct sockaddr *)&local, &len) < 0)
584 return ntohs(local.sin_port);
587 #endif /* !SILC_SYMBIAN */
589 /* Return name of localhost. */
591 char *silc_net_localhost(void)
593 char hostname[256], ip_addr[64];
595 if (gethostname(hostname, sizeof(hostname)))
598 if (!silc_net_gethostbyname(hostname, TRUE, ip_addr, sizeof(ip_addr)))
599 return silc_strdup(hostname);
601 silc_net_gethostbyaddr(ip_addr, hostname, sizeof(hostname));
602 return silc_strdup(hostname);
605 /* Returns local IP address */
607 char *silc_net_localip(void)
609 char hostname[256], ip_addr[64];
611 if (gethostname(hostname, sizeof(hostname)))
614 if (!silc_net_gethostbyname(hostname, TRUE, ip_addr, sizeof(ip_addr)))
617 return silc_strdup(ip_addr);