Backup router related fixes.
[silc.git] / apps / silcd / packet_receive.c
index ff021166d0386dde784634d0addc0efcd4ea708e..bab1f0e09a0c6b1d154bc03e3aedd7523a27fbdf 100644 (file)
@@ -86,7 +86,7 @@ void silc_server_notify(SilcServer server,
      we will broadcast it. The sending socket really cannot be router or
      the router is buggy. If this packet is coming from router then it must
      have the broadcast flag set already and we won't do anything. */
-  if (!server->standalone && server->server_type == SILC_ROUTER &&
+  if (server->server_type == SILC_ROUTER &&
       sock->type == SILC_SOCKET_TYPE_SERVER &&
       !(packet->flags & SILC_PACKET_FLAG_BROADCAST)) {
     SILC_LOG_DEBUG(("Broadcasting received Notify packet"));
@@ -97,12 +97,13 @@ void silc_server_notify(SilcServer server,
       if (!channel_id)
        goto out;
 
-      silc_server_packet_send_dest(server, server->router->connection, 
-                                  packet->type,
-                                  packet->flags | SILC_PACKET_FLAG_BROADCAST, 
-                                  channel_id, SILC_ID_CHANNEL,
-                                  packet->buffer->data, packet->buffer->len, 
-                                  FALSE);
+      if (!server->standalone)
+       silc_server_packet_send_dest(server, server->router->connection, 
+                                    packet->type, packet->flags | 
+                                    SILC_PACKET_FLAG_BROADCAST, 
+                                    channel_id, SILC_ID_CHANNEL,
+                                    packet->buffer->data, 
+                                    packet->buffer->len, FALSE);
       silc_server_backup_send_dest(server, (SilcServerEntry)sock->user_data, 
                                   packet->type, packet->flags,
                                   channel_id, SILC_ID_CHANNEL,
@@ -110,11 +111,12 @@ void silc_server_notify(SilcServer server,
                                   FALSE, TRUE);
     } else {
       /* Packet is destined to client or server */
-      silc_server_packet_send(server, server->router->connection, 
-                             packet->type,
-                             packet->flags | SILC_PACKET_FLAG_BROADCAST, 
-                             packet->buffer->data, packet->buffer->len, 
-                             FALSE);
+      if (!server->standalone)
+       silc_server_packet_send(server, server->router->connection, 
+                               packet->type,
+                               packet->flags | SILC_PACKET_FLAG_BROADCAST, 
+                               packet->buffer->data, packet->buffer->len, 
+                               FALSE);
       silc_server_backup_send(server, (SilcServerEntry)sock->user_data,
                              packet->type, packet->flags,
                              packet->buffer->data, packet->buffer->len, 
@@ -229,6 +231,7 @@ void silc_server_notify(SilcServer server,
     silc_hash_table_add(client->channels, channel, chl);
     silc_free(client_id);
     channel->user_count++;
+    channel->disabled = FALSE;
 
     break;
 
@@ -553,6 +556,20 @@ void silc_server_notify(SilcServer server,
        SILC_LOG_DEBUG(("CMODE change is not allowed"));
        goto out;
       }
+    } else {
+      if (server->server_type == SILC_ROUTER &&
+         channel->mode & SILC_CHANNEL_MODE_FOUNDER_AUTH &&
+         !(mode & SILC_CHANNEL_MODE_FOUNDER_AUTH)) {
+       SILC_LOG_DEBUG(("Enforcing sender to change channel mode"));
+       silc_server_send_notify_cmode(server, sock, FALSE, channel,
+                                     channel->mode, server->id,
+                                     SILC_ID_SERVER,
+                                     channel->cipher,
+                                     channel->hmac_name,
+                                     channel->passphrase,
+                                     channel->founder_key);
+       goto out;
+      }
     }
 
     /* Send the same notify to the channel */
@@ -628,12 +645,23 @@ void silc_server_notify(SilcServer server,
        if (channel->founder_key)
          silc_pkcs_public_key_free(channel->founder_key);
        channel->founder_key = NULL;
-      } else if (!client->data.public_key) {
+      } else if (client && !client->data.public_key) {
        client->data.public_key = 
          silc_pkcs_public_key_copy(channel->founder_key);
       }
     }
 
+    if (mode & SILC_CHANNEL_MODE_FOUNDER_AUTH && !channel->founder_key &&
+       server->server_type == SILC_ROUTER) {
+      SILC_LOG_DEBUG(("Enforcing sender to change channel mode"));
+      mode &= ~SILC_CHANNEL_MODE_FOUNDER_AUTH;
+      silc_server_send_notify_cmode(server, sock, FALSE, channel,
+                                   mode, server->id, SILC_ID_SERVER,
+                                   channel->cipher, 
+                                   channel->hmac_name,
+                                   channel->passphrase, NULL);
+    }
+
     /* Change mode */
     channel->mode = mode;
 
@@ -732,7 +760,7 @@ void silc_server_notify(SilcServer server,
        if (!silc_server_client_on_channel(client, channel, &chl))
          goto out;
        
-       if (client != client2) {
+       if (client != client2 && server->server_type == SILC_ROUTER) {
          /* Sender must be operator */
          if (!(chl->mode & SILC_CHANNEL_UMODE_CHANOP) &&
              !(chl->mode & SILC_CHANNEL_UMODE_CHANFO)) {
@@ -740,7 +768,6 @@ void silc_server_notify(SilcServer server,
            goto out;
          }
 
-         /* Check that target is on channel */
          if (!silc_server_client_on_channel(client2, channel, &chl))
            goto out;
 
@@ -752,12 +779,34 @@ void silc_server_notify(SilcServer server,
        }
       }
 
+      /* Get target channel entry */
+      if (!silc_server_client_on_channel(client2, channel, &chl))
+       goto out;
+
       if (mode & SILC_CHANNEL_UMODE_CHANFO &&
+         !(channel->mode & SILC_CHANNEL_MODE_FOUNDER_AUTH) && !client &&
+         server->server_type == SILC_ROUTER) {
+       /* Get the founder of the channel and if found then this client
+          cannot be the founder since there already is one. */
+       silc_hash_table_list(channel->user_list, &htl);
+       while (silc_hash_table_get(&htl, NULL, (void *)&chl2))
+         if (chl2->mode & SILC_CHANNEL_UMODE_CHANFO) {
+           mode &= ~SILC_CHANNEL_UMODE_CHANFO;
+           silc_server_force_cumode_change(server, sock, channel, chl, mode);
+           notify_sent = TRUE;
+           break;
+         }
+       silc_hash_table_list_reset(&htl);
+       if (!(mode & SILC_CHANNEL_UMODE_CHANFO))
+         break;
+      }
+
+      if (client && mode & SILC_CHANNEL_UMODE_CHANFO &&
          !(chl->mode & SILC_CHANNEL_UMODE_CHANFO) && 
          server->server_type == SILC_ROUTER) {
        /* Check whether this client is allowed to be channel founder on
           this channel. */
-       SilcPublicKey founder_key;
+       SilcPublicKey founder_key = NULL;
 
        /* If channel doesn't have founder auth mode then it's impossible
           that someone would be getting founder rights with CUMODE command.
@@ -799,15 +848,26 @@ void silc_server_notify(SilcServer server,
          break;
        }
 
-       /* Now match the public key we have cached and publick key sent.
+       /* Now match the public key we have cached and public key sent.
           They must match. */
-       if (!silc_pkcs_public_key_compare(channel->founder_key,
+       if (client->data.public_key && 
+           !silc_pkcs_public_key_compare(channel->founder_key,
                                          client->data.public_key)) {
          mode &= ~SILC_CHANNEL_UMODE_CHANFO;
          silc_server_force_cumode_change(server, sock, channel, chl, mode);
          notify_sent = TRUE;
          break;
        }
+       if (!silc_pkcs_public_key_compare(channel->founder_key,
+                                         founder_key)) {
+         mode &= ~SILC_CHANNEL_UMODE_CHANFO;
+         silc_server_force_cumode_change(server, sock, channel, chl, mode);
+         notify_sent = TRUE;
+         break;
+       }
+
+       if (founder_key)
+         silc_pkcs_public_key_free(founder_key);
       }
 
       SILC_LOG_DEBUG(("Changing the channel user mode"));
@@ -988,7 +1048,7 @@ void silc_server_notify(SilcServer server,
       }
 
     if (channel_id2) {
-      SilcBuffer users = NULL, users_modes = NULL;
+      SilcBuffer modes = NULL, users = NULL, users_modes = NULL;
 
       /* Re-announce this channel which ID was changed. */
       silc_server_send_new_channel(server, sock, FALSE, channel->channel_name,
@@ -998,8 +1058,16 @@ void silc_server_notify(SilcServer server,
                                   channel->mode);
 
       /* Re-announce our clients on the channel as the ID has changed now */
-      silc_server_announce_get_channel_users(server, channel, &users,
+      silc_server_announce_get_channel_users(server, channel, &modes, &users,
                                             &users_modes);
+      if (modes) {
+       silc_buffer_push(modes, modes->data - modes->head);
+       silc_server_packet_send_dest(server, sock,
+                                    SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
+                                    channel->id, SILC_ID_CHANNEL,
+                                    modes->data, modes->len, FALSE);
+       silc_buffer_free(modes);
+      }
       if (users) {
        silc_buffer_push(users, users->data - users->head);
        silc_server_packet_send(server, sock,
@@ -1907,6 +1975,8 @@ SilcClientEntry silc_server_new_client(SilcServer server,
     SILC_LOG_INFO(("Unauthenticated client attempted to register to network"));
     silc_server_disconnect_remote(server, sock, 
                                  SILC_STATUS_ERR_NOT_AUTHENTICATED, NULL);
+    if (sock->user_data)
+      silc_server_free_sock_user_data(server, sock, NULL);
     return NULL;
   }
 
@@ -1924,6 +1994,8 @@ SilcClientEntry silc_server_new_client(SilcServer server,
     silc_server_disconnect_remote(server, sock, 
                                  SILC_STATUS_ERR_INCOMPLETE_INFORMATION, 
                                  NULL);
+    if (sock->user_data)
+      silc_server_free_sock_user_data(server, sock, NULL);
     return NULL;
   }
 
@@ -1935,6 +2007,8 @@ SilcClientEntry silc_server_new_client(SilcServer server,
     silc_server_disconnect_remote(server, sock, 
                                  SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
                                  NULL);
+    if (sock->user_data)
+      silc_server_free_sock_user_data(server, sock, NULL);
     return NULL;
   }
 
@@ -1971,6 +2045,8 @@ SilcClientEntry silc_server_new_client(SilcServer server,
       silc_server_disconnect_remote(server, sock, 
                                    SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
                                    NULL);
+      if (sock->user_data)
+       silc_server_free_sock_user_data(server, sock, NULL);
       return NULL;
     }
     
@@ -1991,6 +2067,8 @@ SilcClientEntry silc_server_new_client(SilcServer server,
       silc_server_disconnect_remote(server, sock, 
                                    SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
                                    NULL);
+      if (sock->user_data)
+       silc_server_free_sock_user_data(server, sock, NULL);
       return NULL;
     }
     
@@ -2039,6 +2117,8 @@ SilcClientEntry silc_server_new_client(SilcServer server,
     if (nickfail > 9) {
       silc_server_disconnect_remote(server, sock, 
                                    SILC_STATUS_ERR_BAD_NICKNAME, NULL);
+      if (sock->user_data)
+       silc_server_free_sock_user_data(server, sock, NULL);
       return NULL;
     }
     snprintf(&nickname[strlen(nickname) - 1], 1, "%d", nickfail);
@@ -2062,7 +2142,15 @@ SilcClientEntry silc_server_new_client(SilcServer server,
                            server->router->connection, 
                            server->server_type == SILC_ROUTER ? TRUE : FALSE,
                            client->id, SILC_ID_CLIENT, id_len);
-  
+
+  /* Distribute to backup routers */
+  if (server->server_type == SILC_ROUTER) {
+    SilcBuffer idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
+    silc_server_backup_send(server, NULL, SILC_PACKET_NEW_ID, 0,
+                           idp->data, idp->len, FALSE, TRUE);
+    silc_buffer_free(idp);
+  }
+
   /* Send the new client ID to the client. */
   silc_server_send_new_id(server, sock, FALSE, client->id, SILC_ID_CLIENT,
                          silc_id_get_len(client->id, SILC_ID_CLIENT));
@@ -2117,6 +2205,8 @@ SilcServerEntry silc_server_new_server(SilcServer server,
                                 "server" : "router")));
       silc_server_disconnect_remote(server, sock, 
                                    SILC_STATUS_ERR_NOT_AUTHENTICATED, NULL);
+      if (sock->user_data)
+       silc_server_free_sock_user_data(server, sock, NULL);
       return NULL;
     }
     local = FALSE;
@@ -2129,16 +2219,24 @@ SilcServerEntry silc_server_new_server(SilcServer server,
                                                         &name_len),
                             SILC_STR_END);
   if (ret == -1) {
-    if (id_string)
-      silc_free(id_string);
-    if (server_name)
-      silc_free(server_name);
+    silc_free(id_string);
+    silc_free(server_name);
+    silc_server_disconnect_remote(server, sock, 
+                                 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
+                                 NULL);
+    if (sock->user_data)
+      silc_server_free_sock_user_data(server, sock, NULL);
     return NULL;
   }
 
   if (id_len > buffer->len) {
     silc_free(id_string);
     silc_free(server_name);
+    silc_server_disconnect_remote(server, sock, 
+                                 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
+                                 NULL);
+    if (sock->user_data)
+      silc_server_free_sock_user_data(server, sock, NULL);
     return NULL;
   }
 
@@ -2150,6 +2248,11 @@ SilcServerEntry silc_server_new_server(SilcServer server,
   if (!server_id) {
     silc_free(id_string);
     silc_free(server_name);
+    silc_server_disconnect_remote(server, sock, 
+                                 SILC_STATUS_ERR_INCOMPLETE_INFORMATION,
+                                 NULL);
+    if (sock->user_data)
+      silc_server_free_sock_user_data(server, sock, NULL);
     return NULL;
   }
   silc_free(id_string);
@@ -2160,6 +2263,8 @@ SilcServerEntry silc_server_new_server(SilcServer server,
                   sock->ip, sock->hostname));
     silc_server_disconnect_remote(server, sock, 
                                  SILC_STATUS_ERR_BAD_SERVER_ID, NULL);
+    if (sock->user_data)
+      silc_server_free_sock_user_data(server, sock, NULL);
     silc_free(server_name);
     return NULL;
   }
@@ -2198,8 +2303,16 @@ SilcServerEntry silc_server_new_server(SilcServer server,
                            TRUE, new_server->id, SILC_ID_SERVER, 
                            silc_id_get_len(server_id, SILC_ID_SERVER));
 
-  if (server->server_type == SILC_ROUTER)
+  if (server->server_type == SILC_ROUTER) {
+    /* Distribute to backup routers */
+    SilcBuffer idp = silc_id_payload_encode(new_server->id, SILC_ID_SERVER);
+    silc_server_backup_send(server, NULL, SILC_PACKET_NEW_ID, 0,
+                           idp->data, idp->len, FALSE, TRUE);
+    silc_buffer_free(idp);
+
+    /* Statistics */
     server->stat.cell_servers++;
+  }
 
   /* Check whether this router connection has been replaced by an
      backup router. If it has been then we'll disable the server and will
@@ -2418,14 +2531,15 @@ static void silc_server_new_id_real(SilcServer server,
 
   /* If the sender of this packet is server and we are router we need to
      broadcast this packet to other routers in the network. */
-  if (broadcast && !server->standalone && server->server_type == SILC_ROUTER &&
+  if (broadcast && server->server_type == SILC_ROUTER &&
       sock->type == SILC_SOCKET_TYPE_SERVER &&
       !(packet->flags & SILC_PACKET_FLAG_BROADCAST)) {
     SILC_LOG_DEBUG(("Broadcasting received New ID packet"));
-    silc_server_packet_send(server, server->router->connection,
-                           packet->type, 
-                           packet->flags | SILC_PACKET_FLAG_BROADCAST,
-                           buffer->data, buffer->len, FALSE);
+    if (!server->standalone)
+      silc_server_packet_send(server, server->router->connection,
+                             packet->type, 
+                             packet->flags | SILC_PACKET_FLAG_BROADCAST,
+                             buffer->data, buffer->len, FALSE);
     silc_server_backup_send(server, (SilcServerEntry)sock->user_data, 
                            packet->type, packet->flags,
                            packet->buffer->data, packet->buffer->len, 
@@ -2465,14 +2579,16 @@ void silc_server_new_id_list(SilcServer server, SilcSocketConnection sock,
   /* If the sender of this packet is server and we are router we need to
      broadcast this packet to other routers in the network. Broadcast
      this list packet instead of multiple New ID packets. */
-  if (!server->standalone && server->server_type == SILC_ROUTER &&
+  if (server->server_type == SILC_ROUTER &&
       sock->type == SILC_SOCKET_TYPE_SERVER &&
       !(packet->flags & SILC_PACKET_FLAG_BROADCAST)) {
     SILC_LOG_DEBUG(("Broadcasting received New ID List packet"));
-    silc_server_packet_send(server, server->router->connection,
-                           packet->type, 
-                           packet->flags | SILC_PACKET_FLAG_BROADCAST,
-                           packet->buffer->data, packet->buffer->len, FALSE);
+    if (!server->standalone)
+      silc_server_packet_send(server, server->router->connection,
+                             packet->type, 
+                             packet->flags | SILC_PACKET_FLAG_BROADCAST,
+                             packet->buffer->data, 
+                             packet->buffer->len, FALSE);
     silc_server_backup_send(server, (SilcServerEntry)sock->user_data, 
                            packet->type, packet->flags,
                            packet->buffer->data, packet->buffer->len, 
@@ -2581,6 +2697,7 @@ void silc_server_new_channel(SilcServer server,
                                0, channel_id, sock->user_data, NULL, NULL, 0);
       if (!channel)
        return;
+      channel->disabled = TRUE;
 
       server->stat.channels++;
       if (server->server_type == SILC_ROUTER)
@@ -2631,9 +2748,13 @@ void silc_server_new_channel(SilcServer server,
        silc_free(channel_id);
        return;
       }
+      channel->disabled = TRUE;
 
+#if 0
+      /* CMODE change notify is expected */
       /* Get the mode and set it to the channel */
       channel->mode = silc_channel_get_mode(payload);
+#endif
 
       /* Send the new channel key to the server */
       id = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
@@ -2652,7 +2773,7 @@ void silc_server_new_channel(SilcServer server,
       /* The channel exist by that name, check whether the ID's match.
         If they don't then we'll force the server to use the ID we have.
         We also create a new key for the channel. */
-      SilcBuffer users = NULL, users_modes = NULL;
+      SilcBuffer modes = NULL, users = NULL, users_modes = NULL;
 
       if (!SILC_ID_CHANNEL_COMPARE(channel_id, channel->id)) {
        /* They don't match, send CHANNEL_CHANGE notify to the server to
@@ -2705,8 +2826,16 @@ void silc_server_new_channel(SilcServer server,
       /* Since the channel is coming from server and we also know about it
         then send the JOIN notify to the server so that it see's our
         users on the channel "joining" the channel. */
-      silc_server_announce_get_channel_users(server, channel, &users,
+      silc_server_announce_get_channel_users(server, channel, &modes, &users,
                                             &users_modes);
+      if (modes) {
+       silc_buffer_push(modes, modes->data - modes->head);
+       silc_server_packet_send_dest(server, sock,
+                                    SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
+                                    channel->id, SILC_ID_CHANNEL,
+                                    modes->data, modes->len, FALSE);
+       silc_buffer_free(modes);
+      }
       if (users) {
        silc_buffer_push(users, users->data - users->head);
        silc_server_packet_send(server, sock,
@@ -2750,14 +2879,16 @@ void silc_server_new_channel_list(SilcServer server,
   /* If the sender of this packet is server and we are router we need to
      broadcast this packet to other routers in the network. Broadcast
      this list packet instead of multiple New Channel packets. */
-  if (!server->standalone && server->server_type == SILC_ROUTER &&
+  if (server->server_type == SILC_ROUTER &&
       sock->type == SILC_SOCKET_TYPE_SERVER &&
       !(packet->flags & SILC_PACKET_FLAG_BROADCAST)) {
     SILC_LOG_DEBUG(("Broadcasting received New Channel List packet"));
-    silc_server_packet_send(server, server->router->connection,
-                           packet->type, 
-                           packet->flags | SILC_PACKET_FLAG_BROADCAST,
-                           packet->buffer->data, packet->buffer->len, FALSE);
+    if (!server->standalone)
+      silc_server_packet_send(server, server->router->connection,
+                             packet->type, 
+                             packet->flags | SILC_PACKET_FLAG_BROADCAST,
+                             packet->buffer->data, 
+                             packet->buffer->len, FALSE);
     silc_server_backup_send(server, (SilcServerEntry)sock->user_data, 
                            packet->type, packet->flags,
                            packet->buffer->data, packet->buffer->len, 
@@ -3241,6 +3372,7 @@ void silc_server_resume_client(SilcServer server,
     server->stat.clients--;
     if (server->stat.cell_clients)
       server->stat.cell_clients--;
+    silc_server_del_from_watcher_list(server, client);
     silc_idlist_del_client(server->local_list, client);
     client = detached_client;
 
@@ -3456,14 +3588,15 @@ void silc_server_resume_client(SilcServer server,
 
     /* If the sender of this packet is server and we are router we need to
        broadcast this packet to other routers in the network. */
-    if (!server->standalone && server->server_type == SILC_ROUTER &&
+    if (server->server_type == SILC_ROUTER &&
        sock->type == SILC_SOCKET_TYPE_SERVER &&
        !(packet->flags & SILC_PACKET_FLAG_BROADCAST)) {
       SILC_LOG_DEBUG(("Broadcasting received Resume Client packet"));
-      silc_server_packet_send(server, server->router->connection,
-                             packet->type, 
-                             packet->flags | SILC_PACKET_FLAG_BROADCAST,
-                             buffer->data, buffer->len, FALSE);
+      if (!server->standalone)
+       silc_server_packet_send(server, server->router->connection,
+                               packet->type, 
+                               packet->flags | SILC_PACKET_FLAG_BROADCAST,
+                               buffer->data, buffer->len, FALSE);
       silc_server_backup_send(server, (SilcServerEntry)sock->user_data, 
                              packet->type, packet->flags,
                              packet->buffer->data, packet->buffer->len,