+int
+http_get_addresses (struct Plugin *plugin,
+ const char *serviceName,
+ const struct GNUNET_CONFIGURATION_Handle
+ *cfg, struct sockaddr ***addrs,
+ socklen_t ** addr_lens)
+{
+ int disablev6;
+ struct GNUNET_NETWORK_Handle *desc;
+ unsigned long long port;
+ struct addrinfo hints;
+ struct addrinfo *res;
+ struct addrinfo *pos;
+ struct addrinfo *next;
+ unsigned int i;
+ int resi;
+ int ret;
+ struct sockaddr **saddrs;
+ socklen_t *saddrlens;
+ char *hostname;
+
+ *addrs = NULL;
+ *addr_lens = NULL;
+ desc = NULL;
+
+ disablev6 = !plugin->ipv6;
+
+ if (!disablev6)
+ {
+ /* probe IPv6 support */
+ desc = GNUNET_NETWORK_socket_create (PF_INET6, SOCK_STREAM, 0);
+ if (NULL == desc)
+ {
+ if ((errno == ENOBUFS) || (errno == ENOMEM) || (errno == ENFILE) ||
+ (errno == EACCES))
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "socket");
+ return GNUNET_SYSERR;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ _
+ ("Disabling IPv6 since it is not supported on this system\n"),
+ serviceName, STRERROR (errno));
+ disablev6 = GNUNET_YES;
+ plugin->ipv6 = GNUNET_NO;
+ }
+ else
+ {
+ GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (desc));
+ desc = NULL;
+ }
+ }
+
+ port = 0;
+ if (GNUNET_CONFIGURATION_have_value (cfg, serviceName, "PORT"))
+ {
+ GNUNET_break (GNUNET_OK ==
+ GNUNET_CONFIGURATION_get_value_number (cfg, serviceName,
+ "PORT", &port));
+ if (port > 65535)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _
+ ("Require valid port number for service in configuration!\n"));
+ return GNUNET_SYSERR;
+ }
+ }
+
+ if (GNUNET_CONFIGURATION_have_value (cfg, serviceName, "BINDTO"))
+ {
+ GNUNET_break (GNUNET_OK ==
+ GNUNET_CONFIGURATION_get_value_string (cfg, serviceName,
+ "BINDTO", &hostname));
+ }
+ else
+ hostname = NULL;
+
+ if (hostname != NULL)
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
+ "Resolving `%s' since that is where `%s' will bind to.\n",
+ hostname, serviceName);
+ memset (&hints, 0, sizeof (struct addrinfo));
+ if (disablev6)
+ hints.ai_family = AF_INET;
+ if ((0 != (ret = getaddrinfo (hostname, NULL, &hints, &res))) ||
+ (res == NULL))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Failed to resolve `%s': %s\n"),
+ hostname, gai_strerror (ret));
+ GNUNET_free (hostname);
+ return GNUNET_SYSERR;
+ }
+ next = res;
+ i = 0;
+ while (NULL != (pos = next))
+ {
+ next = pos->ai_next;
+ if ((disablev6) && (pos->ai_family == AF_INET6))
+ continue;
+ i++;
+ }
+ if (0 == i)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to find %saddress for `%s'.\n"),
+ disablev6 ? "IPv4 " : "", hostname);
+ freeaddrinfo (res);
+ GNUNET_free (hostname);
+ return GNUNET_SYSERR;
+ }
+ resi = i;
+ saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
+ saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
+ i = 0;
+ next = res;
+ while (NULL != (pos = next))
+ {
+ next = pos->ai_next;
+ if ((disablev6) && (pos->ai_family == AF_INET6))
+ continue;
+ if ((pos->ai_protocol != IPPROTO_TCP) && (pos->ai_protocol != 0))
+ continue; /* not TCP */
+ if ((pos->ai_socktype != SOCK_STREAM) && (pos->ai_socktype != 0))
+ continue; /* huh? */
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, plugin->name,
+ "Service will bind to `%s'\n",
+ GNUNET_a2s (pos->ai_addr, pos->ai_addrlen));
+ if (pos->ai_family == AF_INET)
+ {
+ GNUNET_assert (pos->ai_addrlen == sizeof (struct sockaddr_in));
+ saddrlens[i] = pos->ai_addrlen;
+ saddrs[i] = GNUNET_malloc (saddrlens[i]);
+ memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
+ ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
+ }
+ else
+ {
+ GNUNET_assert (pos->ai_family == AF_INET6);
+ GNUNET_assert (pos->ai_addrlen == sizeof (struct sockaddr_in6));
+ saddrlens[i] = pos->ai_addrlen;
+ saddrs[i] = GNUNET_malloc (saddrlens[i]);
+ memcpy (saddrs[i], pos->ai_addr, saddrlens[i]);
+ ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
+ }
+ i++;
+ }
+ GNUNET_free (hostname);
+ freeaddrinfo (res);
+ resi = i;
+ }
+ else
+ {
+ /* will bind against everything, just set port */
+ if (disablev6)
+ {
+ /* V4-only */
+ resi = 1;
+ i = 0;
+ saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
+ saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
+
+ saddrlens[i] = sizeof (struct sockaddr_in);
+ saddrs[i] = GNUNET_malloc (saddrlens[i]);
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[i];
+#endif
+ ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
+ ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
+ }
+ else
+ {
+ /* dual stack */
+ resi = 2;
+ saddrs = GNUNET_malloc ((resi + 1) * sizeof (struct sockaddr *));
+ saddrlens = GNUNET_malloc ((resi + 1) * sizeof (socklen_t));
+ i = 0;
+ saddrlens[i] = sizeof (struct sockaddr_in6);
+ saddrs[i] = GNUNET_malloc (saddrlens[i]);
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ ((struct sockaddr_in6 *) saddrs[i])->sin6_len = saddrlens[0];
+#endif
+ ((struct sockaddr_in6 *) saddrs[i])->sin6_family = AF_INET6;
+ ((struct sockaddr_in6 *) saddrs[i])->sin6_port = htons (port);
+ i++;
+ saddrlens[i] = sizeof (struct sockaddr_in);
+ saddrs[i] = GNUNET_malloc (saddrlens[i]);
+#if HAVE_SOCKADDR_IN_SIN_LEN
+ ((struct sockaddr_in *) saddrs[i])->sin_len = saddrlens[1];
+#endif
+ ((struct sockaddr_in *) saddrs[i])->sin_family = AF_INET;
+ ((struct sockaddr_in *) saddrs[i])->sin_port = htons (port);
+ }
+ }
+ *addrs = saddrs;
+ *addr_lens = saddrlens;
+ return resi;
+}