+++ /dev/null
-/*
-
- silcnet.c
-
- Author: Pekka Riikonen <priikone@silcnet.org>
-
- Copyright (C) 1997 - 2007 Pekka Riikonen
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; version 2 of the License.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
-*/
-/* $Id$ */
-
-#include "silc.h"
-
-/* Returns bound port from listener */
-
-SilcUInt16 *silc_net_listener_get_port(SilcNetListener listener,
- SilcUInt32 *port_count)
-{
- SilcUInt16 *ports;
- int i;
-
- ports = silc_calloc(listener->socks_count, sizeof(*ports));
- if (!ports)
- return NULL;
-
- for (i = 0; i < listener->socks_count; i++)
- ports[i] = silc_net_get_local_port(listener->socks[i]);
-
- if (port_count)
- *port_count = listener->socks_count;
-
- return ports;
-}
-
-/* Return bound IP from listener */
-
-char **silc_net_listener_get_ip(SilcNetListener listener,
- SilcUInt32 *ip_count)
-{
- char **ips = NULL, *ip;
- int i, k;
-
- ips = silc_calloc(listener->socks_count, sizeof(*ips));
- if (!ips)
- return NULL;
-
- for (i = 0, k = 0; i < listener->socks_count; i++) {
- if (silc_net_check_local_by_sock(listener->socks[i], NULL, &ip))
- ips[k++] = ip;
- }
-
- if (ip_count)
- *ip_count = k;
-
- return ips;
-}
-
-/* Return bound hostname from listener */
-
-char **silc_net_listener_get_hostname(SilcNetListener listener,
- SilcUInt32 *hostname_count)
-{
- char **hs = NULL, *h;
- int i, k;
-
- hs = silc_calloc(listener->socks_count, sizeof(*hs));
- if (!hs)
- return NULL;
-
- for (i = 0, k = 0; i < listener->socks_count; i++) {
- if (silc_net_check_local_by_sock(listener->socks[i], &h, NULL))
- hs[k++] = h;
- }
-
- if (hostname_count)
- *hostname_count = k;
-
- return hs;
-}
-
-/* Accepts a connection from a particular socket */
-
-int silc_net_accept_connection(int sock)
-{
- int ret = accept(sock, 0, 0);
- if (ret < 0)
- silc_set_errno_posix(errno);
- return ret;
-}
-
-/* Sets a option for a socket. */
-
-int silc_net_set_socket_opt(int sock, int level, int option, int on)
-{
- int ret = setsockopt(sock, level, option, (void *)&on, sizeof(on));
- if (ret < 0)
- silc_set_errno_posix(errno);
- return ret;
-}
-
-/* Get socket options */
-
-int silc_net_get_socket_opt(int sock, int level, int option,
- void *optval, int *opt_len)
-{
- int ret = getsockopt(sock, level, option, optval, opt_len);
- if (ret < 0)
- silc_set_errno_posix(errno);
- return ret;
-}
-
-/* Checks whether IP address sent as argument is valid IPv4 address. */
-
-SilcBool silc_net_is_ip4(const char *addr)
-{
- int count = 0;
-
- while (*addr) {
- if (*addr != '.' && !isdigit((int)*addr))
- return FALSE;
- if (*addr == '.')
- count++;
- addr++;
- }
-
- if (count != 3)
- return FALSE;
-
- return TRUE;
-}
-
-/* Checks whether IP address sent as argument is valid IPv6 address. */
-
-SilcBool silc_net_is_ip6(const char *addr)
-{
- /* XXX does this work with all kinds of IPv6 addresses? */
- while (*addr) {
- if (*addr != ':' && !isxdigit((int)*addr))
- return FALSE;
- addr++;
- }
-
- return TRUE;
-}
-
-/* Checks whether IP address sent as argument is valid IP address. */
-
-SilcBool silc_net_is_ip(const char *addr)
-{
- if (silc_net_is_ip4(addr))
- return TRUE;
- return silc_net_is_ip6(addr);
-}
-
-/* Internal context for async resolving */
-typedef struct {
- SilcNetResolveCallback completion;
- void *context;
- SilcBool prefer_ipv6;
- SilcSchedule schedule;
- char *input;
- char *result;
-} *SilcNetResolveContext;
-
-SILC_TASK_CALLBACK(silc_net_resolve_completion)
-{
- SilcNetResolveContext r = (SilcNetResolveContext)context;
-
- /* Call the completion callback */
- if (r->completion)
- (*r->completion)(r->result, r->context);
-
- silc_free(r->input);
- silc_free(r->result);
- silc_free(r);
-}
-
-/* Thread function to resolve the address for hostname. */
-
-static void *silc_net_gethostbyname_thread(void *context)
-{
- SilcNetResolveContext r = (SilcNetResolveContext)context;
- SilcSchedule schedule = r->schedule;
- char tmp[64];
-
- if (silc_net_gethostbyname(r->input, r->prefer_ipv6, tmp, sizeof(tmp)))
- r->result = silc_strdup(tmp);
-
- silc_schedule_task_add(schedule, 0, silc_net_resolve_completion, r, 0, 1,
- SILC_TASK_TIMEOUT);
- silc_schedule_wakeup(schedule);
- return NULL;
-}
-
-/* Thread function to resolve the hostname for address. */
-
-static void *silc_net_gethostbyaddr_thread(void *context)
-{
- SilcNetResolveContext r = (SilcNetResolveContext)context;
- SilcSchedule schedule = r->schedule;
- char tmp[256];
-
- if (silc_net_gethostbyaddr(r->input, tmp, sizeof(tmp)))
- r->result = silc_strdup(tmp);
-
- silc_schedule_task_add(schedule, 0, silc_net_resolve_completion, r, 0, 1,
- SILC_TASK_TIMEOUT);
- silc_schedule_wakeup(schedule);
- return NULL;
-}
-
-/* Resolves IP address for hostname. */
-
-SilcBool silc_net_gethostbyname(const char *name,
- SilcBool prefer_ipv6, char *address,
- SilcUInt32 address_len)
-{
-#ifdef HAVE_IPV6
- struct addrinfo hints, *ai, *tmp, *ip4 = NULL, *ip6 = NULL;
-
- memset(&hints, 0, sizeof(hints));
- hints.ai_socktype = SOCK_STREAM;
- if (getaddrinfo(name, NULL, &hints, &ai))
- return FALSE;
-
- for (tmp = ai; tmp; tmp = tmp->ai_next) {
- if (tmp->ai_family == AF_INET6) {
- ip6 = tmp;
- if (ip4)
- break;
- continue;
- }
- if (tmp->ai_family == AF_INET) {
- ip4 = tmp;
- if (ip6)
- break;
- continue;
- }
- }
-
- tmp = (prefer_ipv6 ? (ip6 ? ip6 : ip4) : (ip4 ? ip4 : ip6));
- if (!tmp) {
- freeaddrinfo(ai);
- return FALSE;
- }
-
- if (getnameinfo(tmp->ai_addr, tmp->ai_addrlen, address,
- address_len, NULL, 0, NI_NUMERICHOST)) {
- freeaddrinfo(ai);
- return FALSE;
- }
-
- freeaddrinfo(ai);
-#else
- struct hostent *hp;
- struct in_addr ip;
- char *tmp;
-
- if (silc_net_is_ip4(name)) {
- memset(address, 0, address_len);
- if (address_len < strlen(name))
- return FALSE;
- strncpy(address, name, strlen(name));
- return TRUE;
- }
-
- hp = gethostbyname(name);
- if (!hp)
- return FALSE;
-
- memcpy(&ip.s_addr, hp->h_addr_list[0], 4);
- tmp = inet_ntoa(ip);
- if (!tmp)
- return FALSE;
- if (address_len < strlen(tmp))
- return FALSE;
- memset(address, 0, address_len);
- strncpy(address, tmp, strlen(tmp));
-#endif
-
- return TRUE;
-}
-
-/* Resolves IP address for hostname async. */
-
-void silc_net_gethostbyname_async(const char *name,
- SilcBool prefer_ipv6,
- SilcSchedule schedule,
- SilcNetResolveCallback completion,
- void *context)
-{
- SilcNetResolveContext r = silc_calloc(1, sizeof(*r));
-
- if (!schedule) {
- schedule = silc_schedule_get_global();
- SILC_VERIFY(schedule);
- }
-
- r->completion = completion;
- r->context = context;
- r->prefer_ipv6 = prefer_ipv6;
- r->schedule = schedule;
- r->input = silc_strdup(name);
-
- silc_thread_create(silc_net_gethostbyname_thread, r, FALSE);
-}
-
-/* Resolves hostname by IP address. */
-
-SilcBool silc_net_gethostbyaddr(const char *addr, char *name,
- SilcUInt32 name_len)
-{
-#ifdef HAVE_IPV6
- struct addrinfo req, *ai;
-
- memset(&req, 0, sizeof(req));
- req.ai_socktype = SOCK_STREAM;
- req.ai_flags = AI_CANONNAME;
-
- if (getaddrinfo(addr, NULL, &req, &ai))
- return FALSE;
- if (getnameinfo(ai->ai_addr, ai->ai_addrlen, name, name_len, NULL, 0, 0)) {
- freeaddrinfo(ai);
- return FALSE;
- }
- freeaddrinfo(ai);
-#else
- struct hostent *hp;
- unsigned char a[4];
-
- if (!silc_net_addr2bin(addr, a, sizeof(a)))
- return FALSE;
-
- hp = gethostbyaddr(a, 4, AF_INET);
- if (!hp)
- return FALSE;
- if (name_len < strlen(hp->h_name))
- return FALSE;
- memset(name, 0, name_len);
- strncpy(name, hp->h_name, strlen(hp->h_name));
-#endif
-
- return TRUE;
-}
-
-/* Resolves hostname by IP address async. */
-
-void silc_net_gethostbyaddr_async(const char *addr,
- SilcSchedule schedule,
- SilcNetResolveCallback completion,
- void *context)
-{
- SilcNetResolveContext r = silc_calloc(1, sizeof(*r));
-
- if (!schedule) {
- schedule = silc_schedule_get_global();
- SILC_VERIFY(schedule);
- }
-
- r->completion = completion;
- r->context = context;
- r->schedule = schedule;
- r->input = silc_strdup(addr);
-
- silc_thread_create(silc_net_gethostbyaddr_thread, r, FALSE);
-}
-
-#ifndef SILC_SYMBIAN
-
-/* Performs lookups for remote name and IP address. This peforms reverse
- lookup as well to verify that the IP has FQDN. */
-
-SilcBool silc_net_check_host_by_sock(SilcSocket sock, char **hostname,
- char **ip)
-{
- char host[1024];
- int rval, len;
-
-#ifdef HAVE_IPV6
- struct sockaddr_storage remote;
- char s[NI_MAXHOST];
-
- if (hostname)
- *hostname = NULL;
- *ip = NULL;
-
- SILC_LOG_DEBUG(("Resolving remote hostname and IP address"));
-
- memset(&remote, 0, sizeof(remote));
- memset(&s, 0, sizeof(s));
- len = sizeof(remote);
- rval = getpeername(sock, (struct sockaddr *)&remote, &len);
- if (rval < 0)
- return FALSE;
-
- if (getnameinfo((struct sockaddr *)&remote, len, s, sizeof(s), NULL, 0,
- NI_NUMERICHOST))
- return FALSE;
-
- *ip = silc_memdup(s, strlen(s));
- if (*ip == NULL)
- return FALSE;
-#else
- struct sockaddr_in remote;
- char *host_ip;
-
- if (hostname)
- *hostname = NULL;
- *ip = NULL;
-
- SILC_LOG_DEBUG(("Resolving remote hostname and IP address"));
-
- memset(&remote, 0, sizeof(remote));
- len = sizeof(remote);
- rval = getpeername(sock, (struct sockaddr *)&remote, &len);
- if (rval < 0)
- return FALSE;
-
- host_ip = inet_ntoa(remote.sin_addr);
- if (!host_ip)
- return FALSE;
-
- *ip = silc_memdup(host_ip, strlen(host_ip));
- if (*ip == NULL)
- return FALSE;
-#endif
-
- /* Do reverse lookup if we want hostname too. */
- if (hostname) {
- /* Get host by address */
- if (!silc_net_gethostbyaddr(*ip, host, sizeof(host)))
- return FALSE;
-
- *hostname = silc_memdup(host, strlen(host));
- SILC_LOG_DEBUG(("Resolved hostname `%s'", *hostname));
-
- /* Reverse */
- if (!silc_net_gethostbyname(*hostname, TRUE, host, sizeof(host)))
- return FALSE;
-
- if (strcmp(*ip, host))
- return FALSE;
- }
-
- SILC_LOG_DEBUG(("Resolved IP address `%s'", *ip));
- return TRUE;
-}
-
-/* Performs lookups for local name and IP address. This peforms reverse
- lookup as well to verify that the IP has FQDN. */
-
-SilcBool silc_net_check_local_by_sock(SilcSocket sock, char **hostname,
- char **ip)
-{
- char host[1024];
- int rval, len;
-
-#ifdef HAVE_IPV6
- struct sockaddr_storage local;
- char s[NI_MAXHOST];
-
- if (hostname)
- *hostname = NULL;
- *ip = NULL;
-
- SILC_LOG_DEBUG(("Resolving local hostname and IP address"));
-
- memset(&local, 0, sizeof(local));
- memset(&s, 0, sizeof(s));
- len = sizeof(local);
- rval = getsockname(sock, (struct sockaddr *)&local, &len);
- if (rval < 0)
- return FALSE;
-
- if (getnameinfo((struct sockaddr *)&local, len, s, sizeof(s), NULL, 0,
- NI_NUMERICHOST))
- return FALSE;
-
- *ip = silc_memdup(s, strlen(s));
- if (*ip == NULL)
- return FALSE;
-#else
- struct sockaddr_in local;
- char *host_ip;
-
- if (hostname)
- *hostname = NULL;
- *ip = NULL;
-
- SILC_LOG_DEBUG(("Resolving local hostname and IP address"));
-
- memset(&local, 0, sizeof(local));
- len = sizeof(local);
- rval = getsockname(sock, (struct sockaddr *)&local, &len);
- if (rval < 0)
- return FALSE;
-
- host_ip = inet_ntoa(local.sin_addr);
- if (!host_ip)
- return FALSE;
-
- *ip = silc_memdup(host_ip, strlen(host_ip));
- if (*ip == NULL)
- return FALSE;
-#endif
-
- /* Do reverse lookup if we want hostname too. */
- if (hostname) {
- /* Get host by address */
- if (!silc_net_gethostbyaddr(*ip, host, sizeof(host)))
- return FALSE;
-
- *hostname = silc_memdup(host, strlen(host));
- SILC_LOG_DEBUG(("Resolved hostname `%s'", *hostname));
-
- /* Reverse */
- if (!silc_net_gethostbyname(*hostname, TRUE, host, sizeof(host)))
- return FALSE;
-
- if (strcmp(*ip, host))
- return FALSE;
- }
-
- SILC_LOG_DEBUG(("Resolved IP address `%s'", *ip));
- return TRUE;
-}
-
-/* Return remote port by socket. */
-
-SilcUInt16 silc_net_get_remote_port(SilcSocket sock)
-{
-#ifdef HAVE_IPV6
- struct sockaddr_storage remote;
- int len;
- char s[NI_MAXSERV];
-
- memset(&remote, 0, sizeof(remote));
- len = sizeof(remote);
- if (getpeername(sock, (struct sockaddr *)&remote, &len) < 0)
- return 0;
-
- if (getnameinfo((struct sockaddr *)&remote, len, NULL, 0, s, sizeof(s),
- NI_NUMERICSERV))
- return 0;
-
- return atoi(s);
-#else
- struct sockaddr_in remote;
- int len;
-
- memset(&remote, 0, sizeof(remote));
- len = sizeof(remote);
- if (getpeername(sock, (struct sockaddr *)&remote, &len) < 0)
- return 0;
-
- return ntohs(remote.sin_port);
-#endif
-}
-
-/* Return local port by socket. */
-
-SilcUInt16 silc_net_get_local_port(SilcSocket sock)
-{
-#ifdef HAVE_IPV6
- struct sockaddr_storage local;
- int len;
- char s[NI_MAXSERV];
-
- memset(&local, 0, sizeof(local));
- len = sizeof(local);
- if (getsockname(sock, (struct sockaddr *)&local, &len) < 0)
- return 0;
-
- if (getnameinfo((struct sockaddr *)&local, len, NULL, 0, s, sizeof(s),
- NI_NUMERICSERV))
- return 0;
-
- return atoi(s);
-#else
- struct sockaddr_in local;
- int len;
-
- memset(&local, 0, sizeof(local));
- len = sizeof(local);
- if (getsockname(sock, (struct sockaddr *)&local, &len) < 0)
- return 0;
-
- return ntohs(local.sin_port);
-#endif
-}
-#endif /* !SILC_SYMBIAN */
-
-/* Return name of localhost. */
-
-char *silc_net_localhost(void)
-{
- char hostname[256], ip_addr[64];
-
- if (gethostname(hostname, sizeof(hostname)))
- return NULL;
-
- if (!silc_net_gethostbyname(hostname, TRUE, ip_addr, sizeof(ip_addr)))
- return silc_strdup(hostname);
-
- silc_net_gethostbyaddr(ip_addr, hostname, sizeof(hostname));
- return silc_strdup(hostname);
-}
-
-/* Returns local IP address */
-
-char *silc_net_localip(void)
-{
- char hostname[256], ip_addr[64];
-
- if (gethostname(hostname, sizeof(hostname)))
- return NULL;
-
- if (!silc_net_gethostbyname(hostname, TRUE, ip_addr, sizeof(ip_addr)))
- return NULL;
-
- return silc_strdup(ip_addr);
-}
projects / silc.git / blobdiff