return getsockopt(sock, level, option, optval, opt_len);
}
+/* Checks whether IP address sent as argument is valid IPv4 address. */
+
+bool silc_net_is_ip4(const char *addr)
+{
+ int count = 0;
+
+ while (*addr) {
+ if (*addr != '.' && !isdigit(*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. */
+
+bool silc_net_is_ip6(const char *addr)
+{
+ /* XXX does this work with all kinds of IPv6 addresses? */
+ while (*addr) {
+ if (*addr != ':' && !isxdigit(*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)
{
- struct in_addr tmp;
- int len = sizeof(tmp);
- return silc_net_addr2bin(addr, (unsigned char *)&tmp.s_addr, len);
+ 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;
+ 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;
+ char tmp[64];
+
+ if (silc_net_gethostbyname(r->input, tmp, sizeof(tmp)))
+ r->result = strdup(tmp);
+
+ silc_schedule_task_add(r->schedule, 0, silc_net_resolve_completion, r, 0, 1,
+ SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
+ silc_schedule_wakeup(r->schedule);
+ return NULL;
+}
+
+/* Thread function to resolve the hostname for address. */
+
+static void *silc_net_gethostbyaddr_thread(void *context)
+{
+ SilcNetResolveContext r = (SilcNetResolveContext)context;
+ char tmp[256];
+
+ if (silc_net_gethostbyaddr(r->input, tmp, sizeof(tmp)))
+ r->result = strdup(tmp);
+
+ silc_schedule_task_add(r->schedule, 0, silc_net_resolve_completion, r, 0, 1,
+ SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
+ silc_schedule_wakeup(r->schedule);
+ return NULL;
+}
+
+/* Resolves IP address for hostname. */
+
+bool silc_net_gethostbyname(const char *name, char *address,
+ uint32 address_len)
+{
+#ifdef HAVE_IPV6
+ struct addrinfo hints, *ai;
+ char hbuf[NI_MAXHOST];
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_socktype = SOCK_STREAM;
+ if (getaddrinfo(name, NULL, &hints, &ai))
+ return FALSE;
+
+ if (getnameinfo(ai->ai_addr, ai->ai_addrlen, hbuf,
+ sizeof(hbuf), NULL, 0, NI_NUMERICHOST))
+ return FALSE;
+
+ if (ai->ai_family == AF_INET) {
+ if (!inet_ntop(ai->ai_family,
+ &((struct sockaddr_in *)ai->ai_addr)->sin_addr,
+ address, address_len))
+ return FALSE;
+ } else {
+ if (!inet_ntop(ai->ai_family,
+ &((struct sockaddr_in6 *)ai->ai_addr)->sin6_addr,
+ address, address_len))
+ 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,
+ SilcSchedule schedule,
+ SilcNetResolveCallback completion,
+ void *context)
+{
+ SilcNetResolveContext r = silc_calloc(1, sizeof(*r));
+
+ r->completion = completion;
+ r->context = context;
+ r->schedule = schedule;
+ r->input = strdup(name);
+
+ silc_thread_create(silc_net_gethostbyname_thread, r, FALSE);
+}
+
+/* Resolves hostname by IP address. */
+
+bool silc_net_gethostbyaddr(const char *addr, char *name, uint32 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 (name_len < strlen(ai->ai_canonname))
+ return FALSE;
+ memset(name, 0, name_len);
+ strncpy(name, ai->ai_canonname, strlen(ai->ai_canonname));
+
+ freeaddrinfo(ai);
+#else
+ struct hostent *hp;
+
+ hp = gethostbyaddr(addr, strlen(addr), 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));
+
+ r->completion = completion;
+ r->context = context;
+ r->schedule = schedule;
+ r->input = strdup(addr);
+
+ silc_thread_create(silc_net_gethostbyaddr_thread, r, FALSE);
}
/* Performs lookups for remote name and IP address. This peforms reverse
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, 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], ip_addr[64];
+
+ if (gethostname(hostname, sizeof(hostname)))
+ return NULL;
+
+ if (!silc_net_gethostbyname(hostname, ip_addr, sizeof(ip_addr)))
+ return NULL;
+
+ return strdup(ip_addr);
}
projects / silc.git / blobdiff