+ Delay(500); /* wait 500 ms == 0.5 seconds */
+ close(sfd);
+
+ sfd = socket(PF_INET, SOCK_STREAM, 0);
+ if (sfd < 0)
+ Error(ERR_EXIT, "out of file descriptors");
+
+ setsockopt(sfd, tcpproto->p_proto, TCP_NODELAY, (char *)&on, sizeof(int));
+
+ if (connect(sfd, (struct sockaddr *)&s, sizeof(s)) >= 0) /* connected */
+ return TRUE;
+ }
+
+ /* when reaching this point, connect to newly started server has failed */
+ return FALSE;
+}
+#endif /* defined(TARGET_SDL) */
+
+void SendToServer_PlayerName(char *player_name)
+{
+ int len_player_name = strlen(player_name);
+
+ buffer[1] = OP_PLAYER_NAME;
+ memcpy(&buffer[2], player_name, len_player_name);
+ SendBufferToServer(2 + len_player_name);
+ Error(ERR_NETWORK_CLIENT, "you set your player name to \"%s\"", player_name);
+}
+
+void SendToServer_ProtocolVersion()
+{
+ buffer[1] = OP_PROTOCOL_VERSION;
+ buffer[2] = PROTOCOL_VERSION_1;
+ buffer[3] = PROTOCOL_VERSION_2;
+ buffer[4] = PROTOCOL_VERSION_3;
+
+ SendBufferToServer(5);
+}
+
+void SendToServer_NrWanted(int nr_wanted)
+{
+ buffer[1] = OP_NUMBER_WANTED;
+ buffer[2] = nr_wanted;
+
+ SendBufferToServer(3);
+}
+
+void SendToServer_StartPlaying()
+{
+ unsigned long new_random_seed = InitRND(NEW_RANDOMIZE);
+
+ int dummy = 0; /* !!! HAS NO MEANING ANYMORE !!! */
+ /* the name of the level must be enough */
+
+ buffer[1] = OP_START_PLAYING;
+ buffer[2] = (byte)(level_nr >> 8);
+ buffer[3] = (byte)(level_nr & 0xff);
+ buffer[4] = (byte)(dummy >> 8);
+ buffer[5] = (byte)(dummy & 0xff);
+
+ buffer[6] = (unsigned char)((new_random_seed >> 24) & 0xff);
+ buffer[7] = (unsigned char)((new_random_seed >> 16) & 0xff);
+ buffer[8] = (unsigned char)((new_random_seed >> 8) & 0xff);
+ buffer[9] = (unsigned char)((new_random_seed >> 0) & 0xff);
+
+ strcpy((char *)&buffer[10], leveldir_current->identifier);
+
+ SendBufferToServer(10 + strlen(leveldir_current->identifier) + 1);
+}
+
+void SendToServer_PausePlaying()
+{
+ buffer[1] = OP_PAUSE_PLAYING;
+
+ SendBufferToServer(2);
+}
+
+void SendToServer_ContinuePlaying()
+{
+ buffer[1] = OP_CONTINUE_PLAYING;
+
+ SendBufferToServer(2);
+}
+
+void SendToServer_StopPlaying(int cause_for_stopping)
+{
+ buffer[1] = OP_STOP_PLAYING;
+ buffer[2] = cause_for_stopping;
+
+ SendBufferToServer(3);
+}
+
+void SendToServer_MovePlayer(byte player_action)
+{
+ buffer[1] = OP_MOVE_PLAYER;
+ buffer[2] = player_action;
+
+ SendBufferToServer(3);
+}
+
+static void Handle_OP_BAD_PROTOCOL_VERSION()
+{
+ Error(ERR_WARN, "protocol version mismatch");
+ Error(ERR_EXIT, "server expects %d.%d.x instead of %d.%d.%d",
+ buffer[2], buffer[3],
+ PROTOCOL_VERSION_1, PROTOCOL_VERSION_2, PROTOCOL_VERSION_3);
+}
+
+static void Handle_OP_YOUR_NUMBER()
+{
+ int new_client_nr = buffer[2];
+ int new_index_nr = new_client_nr - 1;
+ struct PlayerInfo *old_local_player = local_player;
+ struct PlayerInfo *new_local_player = &stored_player[new_index_nr];
+
+ printf("OP_YOUR_NUMBER: %d\n", buffer[0]);
+ first_player.nr = new_client_nr;
+
+ if (old_local_player != new_local_player)
+ {
+ /* copy existing player settings and change to new player */
+
+ *new_local_player = *old_local_player;
+ old_local_player->connected = FALSE;
+ local_player = new_local_player;
+ }
+
+ if (first_player.nr > MAX_PLAYERS)
+ Error(ERR_EXIT, "sorry, more than %d players not allowed", MAX_PLAYERS);
+
+ Error(ERR_NETWORK_CLIENT, "you get client # %d", new_client_nr);
+}
+
+static void Handle_OP_NUMBER_WANTED()
+{
+ int client_nr_wanted = buffer[2];
+ int old_client_nr = buffer[0];
+ int new_client_nr = buffer[3];
+ int old_index_nr = old_client_nr - 1;
+ int new_index_nr = new_client_nr - 1;
+ int index_nr_wanted = client_nr_wanted - 1;
+ struct PlayerInfo *old_player = &stored_player[old_index_nr];
+ struct PlayerInfo *new_player = &stored_player[new_index_nr];
+
+ printf("OP_NUMBER_WANTED: %d\n", buffer[0]);
+
+ if (new_client_nr == client_nr_wanted) /* switching succeeded */
+ {
+ struct NetworkClientPlayerInfo *player;
+
+ if (old_client_nr != client_nr_wanted) /* client's nr has changed */
+ Error(ERR_NETWORK_CLIENT, "client %d switches to # %d",
+ old_client_nr, new_client_nr);
+ else if (old_client_nr == first_player.nr) /* local player keeps his nr */
+ Error(ERR_NETWORK_CLIENT, "keeping client # %d", new_client_nr);
+
+ if (old_client_nr != new_client_nr)