static void NET_SV_ParseSYN(net_packet_t *packet,
net_client_t *client,
net_addr_t *addr)
{
unsigned int magic;
unsigned int cl_gamemode, cl_gamemission;
unsigned int cl_recording_lowres;
unsigned int cl_drone;
unsigned int is_freedoom;
md5_digest_t deh_md5sum, wad_md5sum;
char *player_name;
char *client_version;
int i;
// read the magic number
if (!NET_ReadInt32(packet, &magic))
{
return;
}
if (magic != NET_MAGIC_NUMBER)
{
// invalid magic number
return;
}
// Check the client version is the same as the server
client_version = NET_ReadString(packet);
if (client_version == NULL)
{
return;
}
if (strcmp(client_version, PACKAGE_STRING) != 0)
{
//!
// @category net
//
// When running a netgame server, ignore version mismatches between
// the server and the client. Using this option may cause game
// desyncs to occur, or differences in protocol may mean the netgame
// will simply not function at all.
//
if (M_CheckParm("-ignoreversion") == 0)
{
NET_SV_SendReject(addr,
"Version mismatch: server version is: "
PACKAGE_STRING);
return;
}
}
// read the game mode and mission
if (!NET_ReadInt16(packet, &cl_gamemode)
|| !NET_ReadInt16(packet, &cl_gamemission)
|| !NET_ReadInt8(packet, &cl_recording_lowres)
|| !NET_ReadInt8(packet, &cl_drone)
|| !NET_ReadMD5Sum(packet, wad_md5sum)
|| !NET_ReadMD5Sum(packet, deh_md5sum)
|| !NET_ReadInt8(packet, &is_freedoom))
{
return;
}
if (!NET_ValidGameMode(cl_gamemode, cl_gamemission))
{
return;
}
// read the player's name
player_name = NET_ReadString(packet);
if (player_name == NULL)
{
return;
}
// received a valid SYN
// not accepting new connections?
if (server_state != SERVER_WAITING_START)
{
NET_SV_SendReject(addr, "Server is not currently accepting connections");
return;
}
// allocate a client slot if there isn't one already
if (client == NULL)
{
// find a slot, or return if none found
for (i=0; i<MAXNETNODES; ++i)
{
if (!clients[i].active)
{
client = &clients[i];
break;
}
}
if (client == NULL)
{
return;
}
}
else
{
// If this is a recently-disconnected client, deactivate
// to allow immediate reconnection
if (client->connection.state == NET_CONN_STATE_DISCONNECTED)
{
client->active = false;
}
}
// New client?
if (!client->active)
{
int num_players;
// Before accepting a new client, check that there is a slot
// free
NET_SV_AssignPlayers();
num_players = NET_SV_NumPlayers();
if ((!cl_drone && num_players >= MAXPLAYERS)
|| NET_SV_NumClients() >= MAXNETNODES)
{
NET_SV_SendReject(addr, "Server is full!");
return;
}
// TODO: Add server option to allow rejecting clients which
// set lowres_turn. This is potentially desirable as the
// presence of such clients affects turning resolution.
// Adopt the game mode and mission of the first connecting client
if (num_players == 0 && !cl_drone)
{
sv_gamemode = cl_gamemode;
sv_gamemission = cl_gamemission;
}
// Save the MD5 checksums
memcpy(client->wad_md5sum, wad_md5sum, sizeof(md5_digest_t));
memcpy(client->deh_md5sum, deh_md5sum, sizeof(md5_digest_t));
client->is_freedoom = is_freedoom;
// Check the connecting client is playing the same game as all
// the other clients
if (cl_gamemode != sv_gamemode || cl_gamemission != sv_gamemission)
{
NET_SV_SendReject(addr, "You are playing the wrong game!");
return;
}
// Activate, initialize connection
NET_SV_InitNewClient(client, addr, player_name);
client->recording_lowres = cl_recording_lowres;
client->drone = cl_drone;
}
if (client->connection.state == NET_CONN_STATE_WAITING_ACK)
{
// force an acknowledgement
client->connection.last_send_time = -1;
}
}
static void NET_CL_ParseWaitingData(net_packet_t *packet)
{
unsigned int num_players;
unsigned int num_drones;
unsigned int is_controller;
signed int player_number;
char *player_names[MAXPLAYERS];
char *player_addr[MAXPLAYERS];
md5_digest_t wad_md5sum, deh_md5sum;
unsigned int server_is_freedoom;
size_t i;
if (!NET_ReadInt8(packet, &num_players)
|| !NET_ReadInt8(packet, &num_drones)
|| !NET_ReadInt8(packet, &is_controller)
|| !NET_ReadSInt8(packet, &player_number))
{
// invalid packet
return;
}
if (num_players > MAXPLAYERS)
{
// insane data
return;
}
if ((player_number >= 0 && drone)
|| (player_number < 0 && !drone)
|| (player_number >= (signed int) num_players))
{
// Invalid player number
return;
}
// Read the player names
for (i=0; i<num_players; ++i)
{
player_names[i] = NET_ReadString(packet);
player_addr[i] = NET_ReadString(packet);
if (player_names[i] == NULL || player_addr[i] == NULL)
{
return;
}
}
if (!NET_ReadMD5Sum(packet, wad_md5sum)
|| !NET_ReadMD5Sum(packet, deh_md5sum)
|| !NET_ReadInt8(packet, &server_is_freedoom))
{
return;
}
net_clients_in_game = num_players;
net_drones_in_game = num_drones;
net_client_controller = is_controller != 0;
net_player_number = player_number;
for (i=0; i<num_players; ++i)
{
strncpy(net_player_names[i], player_names[i], MAXPLAYERNAME);
net_player_names[i][MAXPLAYERNAME-1] = '\0';
strncpy(net_player_addresses[i], player_addr[i], MAXPLAYERNAME);
net_player_addresses[i][MAXPLAYERNAME-1] = '\0';
}
memcpy(net_server_wad_md5sum, wad_md5sum, sizeof(md5_digest_t));
memcpy(net_server_deh_md5sum, deh_md5sum, sizeof(md5_digest_t));
net_server_is_freedoom = server_is_freedoom;
net_client_received_wait_data = true;
}