celestar@5642: /* $Id$ */
celestar@5642: 
celestar@5642: #ifdef ENABLE_NETWORK
celestar@5642: 
celestar@5642: #include "../stdafx.h"
celestar@5642: #include "../debug.h"
celestar@5642: #include "network_data.h"
celestar@5642: #include "../string.h"
celestar@5642: #include "network_client.h"
celestar@5642: #include "../command.h"
celestar@5642: #include "../callback_table.h"
celestar@5642: 
celestar@5642: // Add a command to the local command queue
celestar@5642: void NetworkAddCommandQueue(NetworkClientState *cs, CommandPacket *cp)
celestar@5642: {
celestar@5642: 	CommandPacket* new_cp = malloc(sizeof(*new_cp));
celestar@5642: 
celestar@5642: 	*new_cp = *cp;
celestar@5642: 
celestar@5642: 	if (cs->command_queue == NULL) {
celestar@5642: 		cs->command_queue = new_cp;
celestar@5642: 	} else {
celestar@5642: 		CommandPacket *c = cs->command_queue;
celestar@5642: 		while (c->next != NULL) c = c->next;
celestar@5642: 		c->next = new_cp;
celestar@5642: 	}
celestar@5642: }
celestar@5642: 
celestar@5642: // Prepare a DoCommand to be send over the network
celestar@5642: void NetworkSend_Command(TileIndex tile, uint32 p1, uint32 p2, uint32 cmd, CommandCallback *callback)
celestar@5642: {
celestar@5642: 	CommandPacket *c = malloc(sizeof(CommandPacket));
celestar@5642: 	byte temp_callback;
celestar@5642: 
celestar@5642: 	c->player = _local_player;
celestar@5642: 	c->next = NULL;
celestar@5642: 	c->tile = tile;
celestar@5642: 	c->p1 = p1;
celestar@5642: 	c->p2 = p2;
celestar@5642: 	c->cmd = cmd;
celestar@5642: 	c->callback = 0;
celestar@5642: 
celestar@5642: 	temp_callback = 0;
celestar@5642: 
celestar@5642: 	while (temp_callback < _callback_table_count && _callback_table[temp_callback] != callback)
celestar@5642: 		temp_callback++;
celestar@5642: 	if (temp_callback == _callback_table_count) {
celestar@5642: 		DEBUG(net, 0, "Unknown callback. (Pointer: %p) No callback sent", callback);
celestar@5642: 		temp_callback = 0; /* _callback_table[0] == NULL */
celestar@5642: 	}
celestar@5642: 
celestar@5642: 	if (_network_server) {
celestar@5642: 		// We are the server, so set the command to be executed next possible frame
celestar@5642: 		c->frame = _frame_counter_max + 1;
celestar@5642: 	} else {
celestar@5642: 		c->frame = 0; // The client can't tell which frame, so just make it 0
celestar@5642: 	}
celestar@5642: 
celestar@5642: 	ttd_strlcpy(c->text, (_cmd_text != NULL) ? _cmd_text : "", lengthof(c->text));
celestar@5642: 
celestar@5642: 	if (_network_server) {
celestar@5642: 		// If we are the server, we queue the command in our 'special' queue.
celestar@5642: 		//   In theory, we could execute the command right away, but then the
celestar@5642: 		//   client on the server can do everything 1 tick faster than others.
celestar@5642: 		//   So to keep the game fair, we delay the command with 1 tick
celestar@5642: 		//   which gives about the same speed as most clients.
celestar@5642: 		NetworkClientState *cs;
celestar@5642: 
celestar@5642: 		// And we queue it for delivery to the clients
celestar@5642: 		FOR_ALL_CLIENTS(cs) {
celestar@5642: 			if (cs->status > STATUS_AUTH) NetworkAddCommandQueue(cs, c);
celestar@5642: 		}
celestar@5642: 
celestar@5642: 		// Only the server gets the callback, because clients should not get them
celestar@5642: 		c->callback = temp_callback;
celestar@5642: 		if (_local_command_queue == NULL) {
celestar@5642: 			_local_command_queue = c;
celestar@5642: 		} else {
celestar@5642: 			// Find last packet
celestar@5642: 			CommandPacket *cp = _local_command_queue;
celestar@5642: 			while (cp->next != NULL) cp = cp->next;
celestar@5642: 			cp->next = c;
celestar@5642: 		}
celestar@5642: 
celestar@5642: 		return;
celestar@5642: 	}
celestar@5642: 
celestar@5642: 	// Clients send their command to the server and forget all about the packet
celestar@5642: 	c->callback = temp_callback;
celestar@5642: 	SEND_COMMAND(PACKET_CLIENT_COMMAND)(c);
celestar@5642: }
celestar@5642: 
celestar@5642: // Execute a DoCommand we received from the network
celestar@5642: void NetworkExecuteCommand(CommandPacket *cp)
celestar@5642: {
celestar@5642: 	_current_player = cp->player;
celestar@5642: 	_cmd_text = cp->text;
celestar@5642: 	/* cp->callback is unsigned. so we don't need to do lower bounds checking. */
celestar@5642: 	if (cp->callback > _callback_table_count) {
celestar@5642: 		DEBUG(net, 0, "Received out-of-bounds callback (%d)", cp->callback);
celestar@5642: 		cp->callback = 0;
celestar@5642: 	}
celestar@5642: 	DoCommandP(cp->tile, cp->p1, cp->p2, _callback_table[cp->callback], cp->cmd | CMD_NETWORK_COMMAND);
celestar@5642: }
celestar@5642: 
celestar@5642: #endif /* ENABLE_NETWORK */