Author: Pekka Riikonen <priikone@silcnet.org>
- Copyright (C) 1997 - 2001 Pekka Riikonen
+ Copyright (C) 1997 - 2006 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; either version 2 of the License, or
- (at your option) any later version.
-
+ 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
*/
/* $Id$ */
-#include "silcincludes.h"
-#include "silcnet.h"
+#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;
+}
/* Accepts a connection from a particular socket */
/* Get socket options */
-int silc_net_get_socket_opt(int sock, int level, int option,
+int silc_net_get_socket_opt(int sock, int level, int option,
void *optval, int *opt_len)
{
return getsockopt(sock, level, option, optval, opt_len);
}
+/* 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. */
-bool silc_net_is_ip(const char *addr)
+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 = 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 = 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;
+
+ 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));
+
+ r->completion = completion;
+ r->context = context;
+ r->prefer_ipv6 = prefer_ipv6;
+ r->schedule = schedule;
+ r->input = 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[16];
+
+ 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)
{
- struct in_addr tmp;
- int len = sizeof(tmp);
- return silc_net_addr2bin(addr, (unsigned char *)&tmp.s_addr, len);
+ SilcNetResolveContext r = silc_calloc(1, sizeof(*r));
+
+ r->completion = completion;
+ r->context = context;
+ r->schedule = schedule;
+ r->input = 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. */
-bool silc_net_check_host_by_sock(int sock, char **hostname, char **ip)
+SilcBool silc_net_check_host_by_sock(SilcSocket sock, char **hostname,
+ char **ip)
{
- struct sockaddr_in remote;
- struct hostent *dest;
- char *host_ip = NULL;
- char host_name[1024];
+ char host[1024];
int rval, len;
- int i;
- *hostname = NULL;
+#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;
- host_ip = inet_ntoa(remote.sin_addr);
- if (!host_ip)
+ if (getnameinfo((struct sockaddr *)&remote, len, s, sizeof(s), NULL, 0,
+ NI_NUMERICHOST))
return FALSE;
- *ip = silc_calloc(strlen(host_ip) + 1, sizeof(char));
- memcpy(*ip, host_ip, strlen(host_ip));
-
- /* Get host by address */
- dest = gethostbyaddr((char *)&remote.sin_addr,
- sizeof(struct in_addr), AF_INET);
- if (!dest)
+ *ip = silc_memdup(s, strlen(s));
+ if (*ip == NULL)
return FALSE;
+#else
+ struct sockaddr_in remote;
+ char *host_ip;
- /* Get same host by name to see that the remote host really is
- the who it says it is */
- memset(host_name, 0, sizeof(host_name));
- memcpy(host_name, dest->h_name, strlen(dest->h_name));
+ if (hostname)
+ *hostname = NULL;
+ *ip = NULL;
- *hostname = silc_calloc(strlen(host_name) + 1, sizeof(char));
- memcpy(*hostname, host_name, strlen(host_name));
- SILC_LOG_DEBUG(("Resolved hostname `%s'", *hostname));
+ SILC_LOG_DEBUG(("Resolving remote hostname and IP address"));
- dest = gethostbyname(host_name);
- if (!dest)
+ memset(&remote, 0, sizeof(remote));
+ len = sizeof(remote);
+ rval = getpeername(sock, (struct sockaddr *)&remote, &len);
+ if (rval < 0)
return FALSE;
- /* Find the address from list */
- for (i = 0; dest->h_addr_list[i]; i++)
- if (!memcmp(dest->h_addr_list[i], &remote.sin_addr,
- sizeof(struct in_addr)))
- break;
- if (!dest->h_addr_list[i])
+ host_ip = inet_ntoa(remote.sin_addr);
+ if (!host_ip)
return FALSE;
- silc_free(*ip);
- *ip = silc_calloc(strlen(host_ip) + 1, sizeof(char));
- memcpy(*ip, host_ip, strlen(host_ip));
- SILC_LOG_DEBUG(("Resolved IP address `%s'", *ip));
+ *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. */
-bool silc_net_check_local_by_sock(int sock, char **hostname, char **ip)
+SilcBool silc_net_check_local_by_sock(SilcSocket sock, char **hostname,
+ char **ip)
{
- struct sockaddr_in local;
- struct hostent *dest;
- char *host_ip = NULL;
- char host_name[1024];
+ char host[1024];
int rval, len;
- int i;
- *hostname = NULL;
+#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;
- host_ip = inet_ntoa(local.sin_addr);
- if (!host_ip)
+ if (getnameinfo((struct sockaddr *)&local, len, s, sizeof(s), NULL, 0,
+ NI_NUMERICHOST))
return FALSE;
- *ip = silc_calloc(strlen(host_ip) + 1, sizeof(char));
- memcpy(*ip, host_ip, strlen(host_ip));
-
- /* Get host by address */
- dest = gethostbyaddr((char *)&local.sin_addr,
- sizeof(struct in_addr), AF_INET);
- if (!dest)
+ *ip = silc_memdup(s, strlen(s));
+ if (*ip == NULL)
return FALSE;
+#else
+ struct sockaddr_in local;
+ char *host_ip;
- /* Get same host by name to see that the local host really is
- the who it says it is */
- memset(host_name, 0, sizeof(host_name));
- memcpy(host_name, dest->h_name, strlen(dest->h_name));
+ if (hostname)
+ *hostname = NULL;
+ *ip = NULL;
- *hostname = silc_calloc(strlen(host_name) + 1, sizeof(char));
- memcpy(*hostname, host_name, strlen(host_name));
- SILC_LOG_DEBUG(("Resolved hostname `%s'", *hostname));
+ SILC_LOG_DEBUG(("Resolving local hostname and IP address"));
- dest = gethostbyname(host_name);
- if (!dest)
+ memset(&local, 0, sizeof(local));
+ len = sizeof(local);
+ rval = getsockname(sock, (struct sockaddr *)&local, &len);
+ if (rval < 0)
return FALSE;
- /* Find the address from list */
- for (i = 0; dest->h_addr_list[i]; i++)
- if (!memcmp(dest->h_addr_list[i], &local.sin_addr,
- sizeof(struct in_addr)))
- break;
- if (!dest->h_addr_list[i])
+ host_ip = inet_ntoa(local.sin_addr);
+ if (!host_ip)
return FALSE;
- silc_free(*ip);
- *ip = silc_calloc(strlen(host_ip) + 1, sizeof(char));
- memcpy(*ip, host_ip, strlen(host_ip));
- SILC_LOG_DEBUG(("Resolved IP address `%s'", *ip));
+ *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. */
-uint16 silc_net_get_remote_port(int sock)
+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;
return 0;
return ntohs(remote.sin_port);
+#endif
}
/* Return local port by socket. */
-uint16 silc_net_get_local_port(int sock)
+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;
return 0;
return ntohs(local.sin_port);
+#endif
}
+#endif /* !SILC_SYMBIAN */
/* Return name of localhost. */
char *silc_net_localhost(void)
{
- char hostname[256];
- struct hostent *dest;
+ char hostname[256], ip_addr[64];
if (gethostname(hostname, sizeof(hostname)))
return NULL;
- dest = gethostbyname(hostname);
- if (!dest)
+ if (!silc_net_gethostbyname(hostname, TRUE, ip_addr, sizeof(ip_addr)))
return strdup(hostname);
- return strdup(dest->h_name);
+ silc_net_gethostbyaddr(ip_addr, hostname, sizeof(hostname));
+ return strdup(hostname);
}
/* Returns local IP address */
char *silc_net_localip(void)
{
- char hostname[256];
- struct hostent *dest;
- struct in_addr ip;
- char *ips;
+ char hostname[256], ip_addr[64];
if (gethostname(hostname, sizeof(hostname)))
return NULL;
- dest = gethostbyname(hostname);
- if (!dest)
+ if (!silc_net_gethostbyname(hostname, TRUE, ip_addr, sizeof(ip_addr)))
return NULL;
- memcpy(&ip.s_addr, dest->h_addr_list[0], 4);
- ips = inet_ntoa(ip);
-
- return strdup(ips);
+ return strdup(ip_addr);
}
projects / silc.git / blobdiff