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