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);
100 /* Sets a option for a socket. */
102 int silc_net_set_socket_opt(int sock, int level, int option, int on)
104 int ret = setsockopt(sock, level, option, (void *)&on, sizeof(on));
106 silc_set_errno_posix(errno);
110 /* Get socket options */
112 int silc_net_get_socket_opt(int sock, int level, int option,
113 void *optval, int *opt_len)
115 int ret = getsockopt(sock, level, option, optval, opt_len);
117 silc_set_errno_posix(errno);
121 /* Checks whether IP address sent as argument is valid IPv4 address. */
123 SilcBool silc_net_is_ip4(const char *addr)
128 if (*addr != '.' && !isdigit((int)*addr))
141 /* Checks whether IP address sent as argument is valid IPv6 address. */
143 SilcBool silc_net_is_ip6(const char *addr)
145 /* XXX does this work with all kinds of IPv6 addresses? */
147 if (*addr != ':' && !isxdigit((int)*addr))
155 /* Checks whether IP address sent as argument is valid IP address. */
157 SilcBool silc_net_is_ip(const char *addr)
159 if (silc_net_is_ip4(addr))
161 return silc_net_is_ip6(addr);
164 /* Internal context for async resolving */
166 SilcNetResolveCallback completion;
168 SilcBool prefer_ipv6;
169 SilcSchedule schedule;
172 } *SilcNetResolveContext;
174 SILC_TASK_CALLBACK(silc_net_resolve_completion)
176 SilcNetResolveContext r = (SilcNetResolveContext)context;
178 /* Call the completion callback */
180 (*r->completion)(r->result, r->context);
183 silc_free(r->result);
187 /* Thread function to resolve the address for hostname. */
189 static void *silc_net_gethostbyname_thread(void *context)
191 SilcNetResolveContext r = (SilcNetResolveContext)context;
192 SilcSchedule schedule = r->schedule;
195 if (silc_net_gethostbyname(r->input, r->prefer_ipv6, tmp, sizeof(tmp)))
196 r->result = silc_strdup(tmp);
198 silc_schedule_task_add(schedule, 0, silc_net_resolve_completion, r, 0, 1,
200 silc_schedule_wakeup(schedule);
204 /* Thread function to resolve the hostname for address. */
206 static void *silc_net_gethostbyaddr_thread(void *context)
208 SilcNetResolveContext r = (SilcNetResolveContext)context;
209 SilcSchedule schedule = r->schedule;
212 if (silc_net_gethostbyaddr(r->input, tmp, sizeof(tmp)))
213 r->result = silc_strdup(tmp);
215 silc_schedule_task_add(schedule, 0, silc_net_resolve_completion, r, 0, 1,
217 silc_schedule_wakeup(schedule);
221 /* Resolves IP address for hostname. */
223 SilcBool silc_net_gethostbyname(const char *name,
224 SilcBool prefer_ipv6, char *address,
225 SilcUInt32 address_len)
228 struct addrinfo hints, *ai, *tmp, *ip4 = NULL, *ip6 = NULL;
230 memset(&hints, 0, sizeof(hints));
231 hints.ai_socktype = SOCK_STREAM;
232 if (getaddrinfo(name, NULL, &hints, &ai))
235 for (tmp = ai; tmp; tmp = tmp->ai_next) {
236 if (tmp->ai_family == AF_INET6) {
242 if (tmp->ai_family == AF_INET) {
250 tmp = (prefer_ipv6 ? (ip6 ? ip6 : ip4) : (ip4 ? ip4 : ip6));
256 if (getnameinfo(tmp->ai_addr, tmp->ai_addrlen, address,
257 address_len, NULL, 0, NI_NUMERICHOST)) {
268 if (silc_net_is_ip4(name)) {
269 memset(address, 0, address_len);
270 if (address_len < strlen(name))
272 strncpy(address, name, strlen(name));
276 hp = gethostbyname(name);
280 memcpy(&ip.s_addr, hp->h_addr_list[0], 4);
284 if (address_len < strlen(tmp))
286 memset(address, 0, address_len);
287 strncpy(address, tmp, strlen(tmp));
293 /* Resolves IP address for hostname async. */
295 void silc_net_gethostbyname_async(const char *name,
296 SilcBool prefer_ipv6,
297 SilcSchedule schedule,
298 SilcNetResolveCallback completion,
301 SilcNetResolveContext r = silc_calloc(1, sizeof(*r));
303 r->completion = completion;
304 r->context = context;
305 r->prefer_ipv6 = prefer_ipv6;
306 r->schedule = schedule;
307 r->input = silc_strdup(name);
309 silc_thread_create(silc_net_gethostbyname_thread, r, FALSE);
312 /* Resolves hostname by IP address. */
314 SilcBool silc_net_gethostbyaddr(const char *addr, char *name,
318 struct addrinfo req, *ai;
320 memset(&req, 0, sizeof(req));
321 req.ai_socktype = SOCK_STREAM;
322 req.ai_flags = AI_CANONNAME;
324 if (getaddrinfo(addr, NULL, &req, &ai))
326 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, name, name_len, NULL, 0, 0)) {
335 if (!silc_net_addr2bin(addr, a, sizeof(a)))
338 hp = gethostbyaddr(a, 4, AF_INET);
341 if (name_len < strlen(hp->h_name))
343 memset(name, 0, name_len);
344 strncpy(name, hp->h_name, strlen(hp->h_name));
350 /* Resolves hostname by IP address async. */
352 void silc_net_gethostbyaddr_async(const char *addr,
353 SilcSchedule schedule,
354 SilcNetResolveCallback completion,
357 SilcNetResolveContext r = silc_calloc(1, sizeof(*r));
359 r->completion = completion;
360 r->context = context;
361 r->schedule = schedule;
362 r->input = silc_strdup(addr);
364 silc_thread_create(silc_net_gethostbyaddr_thread, r, FALSE);
369 /* Performs lookups for remote name and IP address. This peforms reverse
370 lookup as well to verify that the IP has FQDN. */
372 SilcBool silc_net_check_host_by_sock(SilcSocket sock, char **hostname,
379 struct sockaddr_storage remote;
386 SILC_LOG_DEBUG(("Resolving remote hostname and IP address"));
388 memset(&remote, 0, sizeof(remote));
389 memset(&s, 0, sizeof(s));
390 len = sizeof(remote);
391 rval = getpeername(sock, (struct sockaddr *)&remote, &len);
395 if (getnameinfo((struct sockaddr *)&remote, len, s, sizeof(s), NULL, 0,
399 *ip = silc_memdup(s, strlen(s));
403 struct sockaddr_in remote;
410 SILC_LOG_DEBUG(("Resolving remote hostname and IP address"));
412 memset(&remote, 0, sizeof(remote));
413 len = sizeof(remote);
414 rval = getpeername(sock, (struct sockaddr *)&remote, &len);
418 host_ip = inet_ntoa(remote.sin_addr);
422 *ip = silc_memdup(host_ip, strlen(host_ip));
427 /* Do reverse lookup if we want hostname too. */
429 /* Get host by address */
430 if (!silc_net_gethostbyaddr(*ip, host, sizeof(host)))
433 *hostname = silc_memdup(host, strlen(host));
434 SILC_LOG_DEBUG(("Resolved hostname `%s'", *hostname));
437 if (!silc_net_gethostbyname(*hostname, TRUE, host, sizeof(host)))
440 if (strcmp(*ip, host))
444 SILC_LOG_DEBUG(("Resolved IP address `%s'", *ip));
448 /* Performs lookups for local name and IP address. This peforms reverse
449 lookup as well to verify that the IP has FQDN. */
451 SilcBool silc_net_check_local_by_sock(SilcSocket sock, char **hostname,
458 struct sockaddr_storage local;
465 SILC_LOG_DEBUG(("Resolving local hostname and IP address"));
467 memset(&local, 0, sizeof(local));
468 memset(&s, 0, sizeof(s));
470 rval = getsockname(sock, (struct sockaddr *)&local, &len);
474 if (getnameinfo((struct sockaddr *)&local, len, s, sizeof(s), NULL, 0,
478 *ip = silc_memdup(s, strlen(s));
482 struct sockaddr_in local;
489 SILC_LOG_DEBUG(("Resolving local hostname and IP address"));
491 memset(&local, 0, sizeof(local));
493 rval = getsockname(sock, (struct sockaddr *)&local, &len);
497 host_ip = inet_ntoa(local.sin_addr);
501 *ip = silc_memdup(host_ip, strlen(host_ip));
506 /* Do reverse lookup if we want hostname too. */
508 /* Get host by address */
509 if (!silc_net_gethostbyaddr(*ip, host, sizeof(host)))
512 *hostname = silc_memdup(host, strlen(host));
513 SILC_LOG_DEBUG(("Resolved hostname `%s'", *hostname));
516 if (!silc_net_gethostbyname(*hostname, TRUE, host, sizeof(host)))
519 if (strcmp(*ip, host))
523 SILC_LOG_DEBUG(("Resolved IP address `%s'", *ip));
527 /* Return remote port by socket. */
529 SilcUInt16 silc_net_get_remote_port(SilcSocket sock)
532 struct sockaddr_storage remote;
536 memset(&remote, 0, sizeof(remote));
537 len = sizeof(remote);
538 if (getpeername(sock, (struct sockaddr *)&remote, &len) < 0)
541 if (getnameinfo((struct sockaddr *)&remote, len, NULL, 0, s, sizeof(s),
547 struct sockaddr_in remote;
550 memset(&remote, 0, sizeof(remote));
551 len = sizeof(remote);
552 if (getpeername(sock, (struct sockaddr *)&remote, &len) < 0)
555 return ntohs(remote.sin_port);
559 /* Return local port by socket. */
561 SilcUInt16 silc_net_get_local_port(SilcSocket sock)
564 struct sockaddr_storage local;
568 memset(&local, 0, sizeof(local));
570 if (getsockname(sock, (struct sockaddr *)&local, &len) < 0)
573 if (getnameinfo((struct sockaddr *)&local, len, NULL, 0, s, sizeof(s),
579 struct sockaddr_in local;
582 memset(&local, 0, sizeof(local));
584 if (getsockname(sock, (struct sockaddr *)&local, &len) < 0)
587 return ntohs(local.sin_port);
590 #endif /* !SILC_SYMBIAN */
592 /* Return name of localhost. */
594 char *silc_net_localhost(void)
596 char hostname[256], ip_addr[64];
598 if (gethostname(hostname, sizeof(hostname)))
601 if (!silc_net_gethostbyname(hostname, TRUE, ip_addr, sizeof(ip_addr)))
602 return silc_strdup(hostname);
604 silc_net_gethostbyaddr(ip_addr, hostname, sizeof(hostname));
605 return silc_strdup(hostname);
608 /* Returns local IP address */
610 char *silc_net_localip(void)
612 char hostname[256], ip_addr[64];
614 if (gethostname(hostname, sizeof(hostname)))
617 if (!silc_net_gethostbyname(hostname, TRUE, ip_addr, sizeof(ip_addr)))
620 return silc_strdup(ip_addr);