5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2006 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 static const char *silc_net_error[] = {
94 "Destination unreachable",
97 "System out of memory",
101 /* Return error as string */
103 const char *silc_net_get_error_string(SilcNetStatus error)
105 if (error < SILC_NET_OK || error > SILC_NET_ERROR)
107 return silc_net_error[error];
110 /* Accepts a connection from a particular socket */
112 int silc_net_accept_connection(int sock)
114 return accept(sock, 0, 0);
117 /* Sets a option for a socket. */
119 int silc_net_set_socket_opt(int sock, int level, int option, int on)
121 return setsockopt(sock, level, option, (void *)&on, sizeof(on));
124 /* Get socket options */
126 int silc_net_get_socket_opt(int sock, int level, int option,
127 void *optval, int *opt_len)
129 return getsockopt(sock, level, option, optval, opt_len);
132 /* Checks whether IP address sent as argument is valid IPv4 address. */
134 SilcBool silc_net_is_ip4(const char *addr)
139 if (*addr != '.' && !isdigit((int)*addr))
152 /* Checks whether IP address sent as argument is valid IPv6 address. */
154 SilcBool silc_net_is_ip6(const char *addr)
156 /* XXX does this work with all kinds of IPv6 addresses? */
158 if (*addr != ':' && !isxdigit((int)*addr))
166 /* Checks whether IP address sent as argument is valid IP address. */
168 SilcBool silc_net_is_ip(const char *addr)
170 if (silc_net_is_ip4(addr))
172 return silc_net_is_ip6(addr);
175 /* Internal context for async resolving */
177 SilcNetResolveCallback completion;
179 SilcBool prefer_ipv6;
180 SilcSchedule schedule;
183 } *SilcNetResolveContext;
185 SILC_TASK_CALLBACK(silc_net_resolve_completion)
187 SilcNetResolveContext r = (SilcNetResolveContext)context;
189 /* Call the completion callback */
191 (*r->completion)(r->result, r->context);
194 silc_free(r->result);
198 /* Thread function to resolve the address for hostname. */
200 static void *silc_net_gethostbyname_thread(void *context)
202 SilcNetResolveContext r = (SilcNetResolveContext)context;
203 SilcSchedule schedule = r->schedule;
206 if (silc_net_gethostbyname(r->input, r->prefer_ipv6, tmp, sizeof(tmp)))
207 r->result = strdup(tmp);
209 silc_schedule_task_add(schedule, 0, silc_net_resolve_completion, r, 0, 1,
211 silc_schedule_wakeup(schedule);
215 /* Thread function to resolve the hostname for address. */
217 static void *silc_net_gethostbyaddr_thread(void *context)
219 SilcNetResolveContext r = (SilcNetResolveContext)context;
220 SilcSchedule schedule = r->schedule;
223 if (silc_net_gethostbyaddr(r->input, tmp, sizeof(tmp)))
224 r->result = strdup(tmp);
226 silc_schedule_task_add(schedule, 0, silc_net_resolve_completion, r, 0, 1,
228 silc_schedule_wakeup(schedule);
232 /* Resolves IP address for hostname. */
234 SilcBool silc_net_gethostbyname(const char *name,
235 SilcBool prefer_ipv6, char *address,
236 SilcUInt32 address_len)
239 struct addrinfo hints, *ai, *tmp, *ip4 = NULL, *ip6 = NULL;
241 memset(&hints, 0, sizeof(hints));
242 hints.ai_socktype = SOCK_STREAM;
243 if (getaddrinfo(name, NULL, &hints, &ai))
246 for (tmp = ai; tmp; tmp = tmp->ai_next) {
247 if (tmp->ai_family == AF_INET6) {
253 if (tmp->ai_family == AF_INET) {
261 tmp = (prefer_ipv6 ? (ip6 ? ip6 : ip4) : (ip4 ? ip4 : ip6));
267 if (getnameinfo(tmp->ai_addr, tmp->ai_addrlen, address,
268 address_len, NULL, 0, NI_NUMERICHOST)) {
279 if (silc_net_is_ip4(name)) {
280 memset(address, 0, address_len);
281 if (address_len < strlen(name))
283 strncpy(address, name, strlen(name));
287 hp = gethostbyname(name);
291 memcpy(&ip.s_addr, hp->h_addr_list[0], 4);
295 if (address_len < strlen(tmp))
297 memset(address, 0, address_len);
298 strncpy(address, tmp, strlen(tmp));
304 /* Resolves IP address for hostname async. */
306 void silc_net_gethostbyname_async(const char *name,
307 SilcBool prefer_ipv6,
308 SilcSchedule schedule,
309 SilcNetResolveCallback completion,
312 SilcNetResolveContext r = silc_calloc(1, sizeof(*r));
314 r->completion = completion;
315 r->context = context;
316 r->prefer_ipv6 = prefer_ipv6;
317 r->schedule = schedule;
318 r->input = strdup(name);
320 silc_thread_create(silc_net_gethostbyname_thread, r, FALSE);
323 /* Resolves hostname by IP address. */
325 SilcBool silc_net_gethostbyaddr(const char *addr, char *name,
329 struct addrinfo req, *ai;
331 memset(&req, 0, sizeof(req));
332 req.ai_socktype = SOCK_STREAM;
333 req.ai_flags = AI_CANONNAME;
335 if (getaddrinfo(addr, NULL, &req, &ai))
337 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, name, name_len, NULL, 0, 0)) {
346 if (!silc_net_addr2bin(addr, a, sizeof(a)))
349 hp = gethostbyaddr(a, 4, AF_INET);
352 if (name_len < strlen(hp->h_name))
354 memset(name, 0, name_len);
355 strncpy(name, hp->h_name, strlen(hp->h_name));
361 /* Resolves hostname by IP address async. */
363 void silc_net_gethostbyaddr_async(const char *addr,
364 SilcSchedule schedule,
365 SilcNetResolveCallback completion,
368 SilcNetResolveContext r = silc_calloc(1, sizeof(*r));
370 r->completion = completion;
371 r->context = context;
372 r->schedule = schedule;
373 r->input = strdup(addr);
375 silc_thread_create(silc_net_gethostbyaddr_thread, r, FALSE);
380 /* Performs lookups for remote name and IP address. This peforms reverse
381 lookup as well to verify that the IP has FQDN. */
383 SilcBool silc_net_check_host_by_sock(SilcSocket sock, char **hostname,
390 struct sockaddr_storage remote;
397 SILC_LOG_DEBUG(("Resolving remote hostname and IP address"));
399 memset(&remote, 0, sizeof(remote));
400 memset(&s, 0, sizeof(s));
401 len = sizeof(remote);
402 rval = getpeername(sock, (struct sockaddr *)&remote, &len);
406 if (getnameinfo((struct sockaddr *)&remote, len, s, sizeof(s), NULL, 0,
410 *ip = silc_memdup(s, strlen(s));
414 struct sockaddr_in remote;
421 SILC_LOG_DEBUG(("Resolving remote hostname and IP address"));
423 memset(&remote, 0, sizeof(remote));
424 len = sizeof(remote);
425 rval = getpeername(sock, (struct sockaddr *)&remote, &len);
429 host_ip = inet_ntoa(remote.sin_addr);
433 *ip = silc_memdup(host_ip, strlen(host_ip));
438 /* Do reverse lookup if we want hostname too. */
440 /* Get host by address */
441 if (!silc_net_gethostbyaddr(*ip, host, sizeof(host)))
444 *hostname = silc_memdup(host, strlen(host));
445 SILC_LOG_DEBUG(("Resolved hostname `%s'", *hostname));
448 if (!silc_net_gethostbyname(*hostname, TRUE, host, sizeof(host)))
451 if (strcmp(*ip, host))
455 SILC_LOG_DEBUG(("Resolved IP address `%s'", *ip));
459 /* Performs lookups for local name and IP address. This peforms reverse
460 lookup as well to verify that the IP has FQDN. */
462 SilcBool silc_net_check_local_by_sock(SilcSocket sock, char **hostname,
469 struct sockaddr_storage local;
476 SILC_LOG_DEBUG(("Resolving local hostname and IP address"));
478 memset(&local, 0, sizeof(local));
479 memset(&s, 0, sizeof(s));
481 rval = getsockname(sock, (struct sockaddr *)&local, &len);
485 if (getnameinfo((struct sockaddr *)&local, len, s, sizeof(s), NULL, 0,
489 *ip = silc_memdup(s, strlen(s));
493 struct sockaddr_in local;
500 SILC_LOG_DEBUG(("Resolving local hostname and IP address"));
502 memset(&local, 0, sizeof(local));
504 rval = getsockname(sock, (struct sockaddr *)&local, &len);
508 host_ip = inet_ntoa(local.sin_addr);
512 *ip = silc_memdup(host_ip, strlen(host_ip));
517 /* Do reverse lookup if we want hostname too. */
519 /* Get host by address */
520 if (!silc_net_gethostbyaddr(*ip, host, sizeof(host)))
523 *hostname = silc_memdup(host, strlen(host));
524 SILC_LOG_DEBUG(("Resolved hostname `%s'", *hostname));
527 if (!silc_net_gethostbyname(*hostname, TRUE, host, sizeof(host)))
530 if (strcmp(*ip, host))
534 SILC_LOG_DEBUG(("Resolved IP address `%s'", *ip));
538 /* Return remote port by socket. */
540 SilcUInt16 silc_net_get_remote_port(SilcSocket sock)
543 struct sockaddr_storage remote;
547 memset(&remote, 0, sizeof(remote));
548 len = sizeof(remote);
549 if (getpeername(sock, (struct sockaddr *)&remote, &len) < 0)
552 if (getnameinfo((struct sockaddr *)&remote, len, NULL, 0, s, sizeof(s),
558 struct sockaddr_in remote;
561 memset(&remote, 0, sizeof(remote));
562 len = sizeof(remote);
563 if (getpeername(sock, (struct sockaddr *)&remote, &len) < 0)
566 return ntohs(remote.sin_port);
570 /* Return local port by socket. */
572 SilcUInt16 silc_net_get_local_port(SilcSocket sock)
575 struct sockaddr_storage local;
579 memset(&local, 0, sizeof(local));
581 if (getsockname(sock, (struct sockaddr *)&local, &len) < 0)
584 if (getnameinfo((struct sockaddr *)&local, len, NULL, 0, s, sizeof(s),
590 struct sockaddr_in local;
593 memset(&local, 0, sizeof(local));
595 if (getsockname(sock, (struct sockaddr *)&local, &len) < 0)
598 return ntohs(local.sin_port);
601 #endif /* !SILC_SYMBIAN */
603 /* Return name of localhost. */
605 char *silc_net_localhost(void)
607 char hostname[256], ip_addr[64];
609 if (gethostname(hostname, sizeof(hostname)))
612 if (!silc_net_gethostbyname(hostname, TRUE, ip_addr, sizeof(ip_addr)))
613 return strdup(hostname);
615 silc_net_gethostbyaddr(ip_addr, hostname, sizeof(hostname));
616 return strdup(hostname);
619 /* Returns local IP address */
621 char *silc_net_localip(void)
623 char hostname[256], ip_addr[64];
625 if (gethostname(hostname, sizeof(hostname)))
628 if (!silc_net_gethostbyname(hostname, TRUE, ip_addr, sizeof(ip_addr)))
631 return strdup(ip_addr);