void NET_WriteQueryData(net_packet_t *packet, net_querydata_t *query)
{
NET_WriteString(packet, query->version);
NET_WriteInt8(packet, query->server_state);
NET_WriteInt8(packet, query->num_players);
NET_WriteInt8(packet, query->max_players);
NET_WriteInt8(packet, query->gamemode);
NET_WriteInt8(packet, query->gamemission);
NET_WriteString(packet, query->description);
}
static void NET_CL_SendTics(int start, int end)
{
net_packet_t *packet;
int i;
if (!net_client_connected)
{
// Disconnected from server
return;
}
if (start < 0)
start = 0;
// Build a new packet to send to the server
packet = NET_NewPacket(512);
NET_WriteInt16(packet, NET_PACKET_TYPE_GAMEDATA);
// Write the start tic and number of tics. Send only the low byte
// of start - it can be inferred by the server.
NET_WriteInt8(packet, (gametic / ticdup) & 0xff);
NET_WriteInt8(packet, start & 0xff);
NET_WriteInt8(packet, end - start + 1);
// Add the tics.
for (i=start; i<=end; ++i)
{
net_server_send_t *sendobj;
sendobj = &send_queue[i % BACKUPTICS];
NET_WriteInt16(packet, average_latency / FRACUNIT);
NET_WriteTiccmdDiff(packet, &sendobj->cmd, lowres_turn);
}
// Send the packet
NET_Conn_SendPacket(&client_connection, packet);
// All done!
NET_FreePacket(packet);
// Acknowledgement has been sent as part of the packet
need_to_acknowledge = false;
}
void NET_WriteFullTiccmd(net_packet_t *packet, net_full_ticcmd_t *cmd, boolean lowres_turn)
{
unsigned int bitfield;
int i;
// Write the latency
NET_WriteInt16(packet, cmd->latency);
// Write "header" byte indicating which players are active
// in this ticcmd
bitfield = 0;
for (i=0; i<NET_MAXPLAYERS; ++i)
{
if (cmd->playeringame[i])
{
bitfield |= 1 << i;
}
}
NET_WriteInt8(packet, bitfield);
// Write player ticcmds
for (i=0; i<NET_MAXPLAYERS; ++i)
{
if (cmd->playeringame[i])
{
NET_WriteTiccmdDiff(packet, &cmd->cmds[i], lowres_turn);
}
}
}
static void NET_CL_SendResendRequest(int start, int end)
{
net_packet_t *packet;
unsigned int nowtime;
int i;
//printf("CL: Send resend %i-%i\n", start, end);
packet = NET_NewPacket(64);
NET_WriteInt16(packet, NET_PACKET_TYPE_GAMEDATA_RESEND);
NET_WriteInt32(packet, start);
NET_WriteInt8(packet, end - start + 1);
NET_Conn_SendPacket(&client_connection, packet);
NET_FreePacket(packet);
nowtime = I_GetTimeMS();
// Save the time we sent the resend request
for (i=start; i<=end; ++i)
{
int index;
index = i - recvwindow_start;
if (index < 0 || index >= BACKUPTICS)
continue;
recvwindow[index].resend_time = nowtime;
}
}
static void NET_WriteBlob(net_packet_t *packet, uint8_t *buf, size_t len)
{
int i;
for (i=0; i<len; ++i)
{
NET_WriteInt8(packet, buf[i]);
}
}
static void NET_CL_SendSYN(void)
{
net_packet_t *packet;
packet = NET_NewPacket(10);
NET_WriteInt16(packet, NET_PACKET_TYPE_SYN);
NET_WriteInt32(packet, NET_MAGIC_NUMBER);
NET_WriteString(packet, PACKAGE_STRING);
NET_WriteInt16(packet, gamemode);
NET_WriteInt16(packet, gamemission);
NET_WriteInt8(packet, lowres_turn);
NET_WriteInt8(packet, drone);
NET_WriteMD5Sum(packet, net_local_wad_md5sum);
NET_WriteMD5Sum(packet, net_local_deh_md5sum);
NET_WriteInt8(packet, net_local_is_freedoom);
NET_WriteString(packet, net_player_name);
NET_Conn_SendPacket(&client_connection, packet);
NET_FreePacket(packet);
}
static void NET_SV_SendTics(net_client_t *client,
unsigned int start, unsigned int end)
{
net_packet_t *packet;
unsigned int i;
packet = NET_NewPacket(500);
NET_WriteInt16(packet, NET_PACKET_TYPE_GAMEDATA);
// Send the start tic and number of tics
NET_WriteInt8(packet, start & 0xff);
NET_WriteInt8(packet, end-start + 1);
// Write the tics
for (i=start; i<=end; ++i)
{
net_full_ticcmd_t *cmd;
cmd = &client->sendqueue[i % BACKUPTICS];
if (i != cmd->seq)
{
I_Error("Wanted to send %i, but %i is in its place", i, cmd->seq);
}
// Add command
NET_WriteFullTiccmd(packet, cmd, sv_settings.lowres_turn);
}
// Send packet
NET_Conn_SendPacket(&client->connection, packet);
NET_FreePacket(packet);
}
void NET_WriteConnectData(net_packet_t *packet, net_connect_data_t *data)
{
NET_WriteInt8(packet, data->gamemode);
NET_WriteInt8(packet, data->gamemission);
NET_WriteInt8(packet, data->lowres_turn);
NET_WriteInt8(packet, data->drone);
NET_WriteInt8(packet, data->max_players);
NET_WriteInt8(packet, data->is_freedoom);
NET_WriteSHA1Sum(packet, data->wad_sha1sum);
NET_WriteSHA1Sum(packet, data->deh_sha1sum);
NET_WriteInt8(packet, data->player_class);
}
static boolean NET_Conn_ReliablePacket(net_connection_t *conn,
net_packet_t *packet)
{
unsigned int seq;
net_packet_t *reply;
boolean result;
// Read the sequence number
if (!NET_ReadInt8(packet, &seq))
{
return true;
}
if (seq != (unsigned int)(conn->reliable_recv_seq & 0xff))
{
// This is not the next expected packet in the sequence!
//
// Discard the packet. If we were smart, we would use a proper
// sliding window protocol to do this, but I'm lazy.
result = true;
}
else
{
// Now we can receive the next packet in the sequence.
conn->reliable_recv_seq = (conn->reliable_recv_seq + 1) & 0xff;
result = false;
}
// Send an acknowledgement
// Note: this is braindead. It would be much more sensible to
// include this in the next packet, rather than the overhead of
// sending a complete packet just for one byte of information.
reply = NET_NewPacket(10);
NET_WriteInt16(reply, NET_PACKET_TYPE_RELIABLE_ACK);
NET_WriteInt8(reply, conn->reliable_recv_seq & 0xff);
NET_Conn_SendPacket(conn, reply);
NET_FreePacket(reply);
return result;
}
static void NET_CL_SendGameDataACK(void)
{
net_packet_t *packet;
packet = NET_NewPacket(10);
NET_WriteInt16(packet, NET_PACKET_TYPE_GAMEDATA_ACK);
NET_WriteInt8(packet, (gametic / ticdup) & 0xff);
NET_Conn_SendPacket(&client_connection, packet);
NET_FreePacket(packet);
need_to_acknowledge = false;
}
static void NET_SV_ParseLaunch(net_packet_t *packet, net_client_t *client)
{
net_packet_t *launchpacket;
int num_players;
unsigned int i;
NET_Log("server: processing launch packet");
// Only the controller can launch the game.
if (client != NET_SV_Controller())
{
NET_Log("server: error: this client isn't the controller, %d != %d",
client, NET_SV_Controller());
return;
}
// Can only launch when we are in the waiting state.
if (server_state != SERVER_WAITING_LAUNCH)
{
NET_Log("server: error: not in waiting launch state, state=%d",
server_state);
return;
}
// Forward launch on to all clients.
NET_Log("server: sending launch to all clients");
NET_SV_AssignPlayers();
num_players = NET_SV_NumPlayers();
for (i=0; i<MAXNETNODES; ++i)
{
if (!ClientConnected(&clients[i]))
continue;
launchpacket = NET_Conn_NewReliable(&clients[i].connection,
NET_PACKET_TYPE_LAUNCH);
NET_WriteInt8(launchpacket, num_players);
}
// Now in launch state.
server_state = SERVER_WAITING_START;
}
static void NET_SV_SendResendRequest(net_client_t *client, int start, int end)
{
net_packet_t *packet;
net_client_recv_t *recvobj;
int i;
unsigned int nowtime;
int index;
NET_Log("server: send resend to %s for tics %d-%d",
NET_AddrToString(client->addr), start, end);
packet = NET_NewPacket(20);
NET_WriteInt16(packet, NET_PACKET_TYPE_GAMEDATA_RESEND);
NET_WriteInt32(packet, start);
NET_WriteInt8(packet, end - start + 1);
NET_Conn_SendPacket(&client->connection, packet);
NET_FreePacket(packet);
// Store the time we send the resend request
nowtime = I_GetTimeMS();
for (i=start; i<=end; ++i)
{
index = i - recvwindow_start;
if (index >= BACKUPTICS)
{
// Outside the range
continue;
}
recvobj = &recvwindow[index][client->player_number];
recvobj->resend_time = nowtime;
}
}
void NET_WriteWaitData(net_packet_t *packet, net_waitdata_t *data)
{
int i;
NET_WriteInt8(packet, data->num_players);
NET_WriteInt8(packet, data->num_drones);
NET_WriteInt8(packet, data->ready_players);
NET_WriteInt8(packet, data->max_players);
NET_WriteInt8(packet, data->is_controller);
NET_WriteInt8(packet, data->consoleplayer);
for (i = 0; i < data->num_players && i < NET_MAXPLAYERS; ++i)
{
NET_WriteString(packet, data->player_names[i]);
NET_WriteString(packet, data->player_addrs[i]);
}
NET_WriteSHA1Sum(packet, data->wad_sha1sum);
NET_WriteSHA1Sum(packet, data->deh_sha1sum);
NET_WriteInt8(packet, data->is_freedoom);
}
net_packet_t *NET_Conn_NewReliable(net_connection_t *conn, int packet_type)
{
net_packet_t *packet;
net_reliable_packet_t *rp;
net_reliable_packet_t **listend;
// Generate a packet with the right header
packet = NET_NewPacket(100);
NET_WriteInt16(packet, packet_type | NET_RELIABLE_PACKET);
// write the low byte of the send sequence number
NET_WriteInt8(packet, conn->reliable_send_seq & 0xff);
// Add to the list of reliable packets
rp = malloc(sizeof(net_reliable_packet_t));
rp->packet = packet;
rp->next = NULL;
rp->seq = conn->reliable_send_seq;
rp->last_send_time = -1;
for (listend = &conn->reliable_packets;
*listend != NULL;
listend = &((*listend)->next));
*listend = rp;
// Count along the sequence
conn->reliable_send_seq = (conn->reliable_send_seq + 1) & 0xff;
// Finished
return packet;
}
static void NET_SV_ParseGameStart(net_packet_t *packet, net_client_t *client)
{
net_gamesettings_t settings;
net_packet_t *startpacket;
int nowtime;
int i;
if (client != NET_SV_Controller())
{
// Only the controller can start a new game
return;
}
if (!NET_ReadSettings(packet, &settings))
{
// Malformed packet
return;
}
// Check the game settings are valid
if (!NET_ValidGameSettings(sv_gamemode, sv_gamemission, &settings))
{
return;
}
if (server_state != SERVER_WAITING_START)
{
// Can only start a game if we are in the waiting start state.
return;
}
// Assign player numbers
NET_SV_AssignPlayers();
// Check if anyone is recording a demo and set lowres_turn if so.
settings.lowres_turn = false;
for (i=0; i<MAXPLAYERS; ++i)
{
if (sv_players[i] != NULL && sv_players[i]->recording_lowres)
{
settings.lowres_turn = true;
}
}
nowtime = I_GetTimeMS();
// Send start packets to each connected node
for (i=0; i<MAXNETNODES; ++i)
{
if (!ClientConnected(&clients[i]))
continue;
clients[i].last_gamedata_time = nowtime;
startpacket = NET_Conn_NewReliable(&clients[i].connection,
NET_PACKET_TYPE_GAMESTART);
NET_WriteInt8(startpacket, NET_SV_NumPlayers());
NET_WriteInt8(startpacket, clients[i].player_number);
NET_WriteSettings(startpacket, &settings);
}
// Change server state
server_state = SERVER_IN_GAME;
sv_settings = settings;
memset(recvwindow, 0, sizeof(recvwindow));
recvwindow_start = 0;
}
static void NET_SV_SendWaitingData(net_client_t *client)
{
net_packet_t *packet;
net_client_t *controller;
int num_players;
int i;
NET_SV_AssignPlayers();
controller = NET_SV_Controller();
num_players = NET_SV_NumPlayers();
// time to send the client another status packet
packet = NET_NewPacket(10);
NET_WriteInt16(packet, NET_PACKET_TYPE_WAITING_DATA);
// include the number of players waiting
NET_WriteInt8(packet, num_players);
// send the number of drone clients
NET_WriteInt8(packet, NET_SV_NumDrones());
// indicate whether the client is the controller
NET_WriteInt8(packet, client == controller);
// send the player number of this client
NET_WriteInt8(packet, client->player_number);
// send the addresses of all players
for (i=0; i<num_players; ++i)
{
char *addr;
// name
NET_WriteString(packet, sv_players[i]->name);
// address
addr = NET_AddrToString(sv_players[i]->addr);
NET_WriteString(packet, addr);
}
// Send the WAD and dehacked checksums of the controlling client.
if (controller != NULL)
{
NET_WriteMD5Sum(packet, controller->wad_md5sum);
NET_WriteMD5Sum(packet, controller->deh_md5sum);
NET_WriteInt8(packet, controller->is_freedoom);
}
else
{
NET_WriteMD5Sum(packet, client->wad_md5sum);
NET_WriteMD5Sum(packet, client->deh_md5sum);
NET_WriteInt8(packet, client->is_freedoom);
}
// send packet to client and free
NET_Conn_SendPacket(&client->connection, packet);
NET_FreePacket(packet);
}
void NET_WriteTiccmdDiff(net_packet_t *packet, net_ticdiff_t *diff,
boolean lowres_turn)
{
// Header
NET_WriteInt8(packet, diff->diff);
// Write the fields which are enabled:
if (diff->diff & NET_TICDIFF_FORWARD)
NET_WriteInt8(packet, diff->cmd.forwardmove);
if (diff->diff & NET_TICDIFF_SIDE)
NET_WriteInt8(packet, diff->cmd.sidemove);
if (diff->diff & NET_TICDIFF_TURN)
{
if (lowres_turn)
{
NET_WriteInt8(packet, diff->cmd.angleturn / 256);
}
else
{
NET_WriteInt16(packet, diff->cmd.angleturn);
}
}
if (diff->diff & NET_TICDIFF_BUTTONS)
NET_WriteInt8(packet, diff->cmd.buttons);
if (diff->diff & NET_TICDIFF_CONSISTANCY)
NET_WriteInt8(packet, diff->cmd.consistancy);
if (diff->diff & NET_TICDIFF_CHATCHAR)
NET_WriteInt8(packet, diff->cmd.chatchar);
if (diff->diff & NET_TICDIFF_RAVEN)
{
NET_WriteInt8(packet, diff->cmd.lookfly);
NET_WriteInt8(packet, diff->cmd.arti);
}
if (diff->diff & NET_TICDIFF_STRIFE)
{
NET_WriteInt8(packet, diff->cmd.buttons2);
NET_WriteInt8(packet, diff->cmd.inventory);
}
}
void NET_WriteSettings(net_packet_t *packet, net_gamesettings_t *settings)
{
int i;
NET_WriteInt8(packet, settings->ticdup);
NET_WriteInt8(packet, settings->extratics);
NET_WriteInt8(packet, settings->deathmatch);
NET_WriteInt8(packet, settings->nomonsters);
NET_WriteInt8(packet, settings->fast_monsters);
NET_WriteInt8(packet, settings->respawn_monsters);
NET_WriteInt8(packet, settings->episode);
NET_WriteInt8(packet, settings->map);
NET_WriteInt8(packet, settings->skill);
NET_WriteInt8(packet, settings->gameversion);
NET_WriteInt8(packet, settings->lowres_turn);
NET_WriteInt8(packet, settings->new_sync);
NET_WriteInt32(packet, settings->timelimit);
NET_WriteInt8(packet, settings->loadgame);
NET_WriteInt8(packet, settings->random);
NET_WriteInt8(packet, settings->num_players);
NET_WriteInt8(packet, settings->consoleplayer);
for (i = 0; i < settings->num_players; ++i)
{
NET_WriteInt8(packet, settings->player_classes[i]);
}
}