ref: f47ac12115f687ad7ec5348679fda15b4cfc4009
dir: /net_main.c/
#include <u.h>
#include <libc.h>
#include <stdio.h>
#include "quakedef.h"
qsocket_t *net_activeSockets = nil;
qsocket_t *net_freeSockets = nil;
int net_numsockets = 0;
qboolean serialAvailable = false;
qboolean ipxAvailable = false;
qboolean tcpipAvailable = false;
int net_hostport;
int DEFAULTnet_hostport = 26000;
char my_ipx_address[NET_NAMELEN];
char my_tcpip_address[NET_NAMELEN];
void (*GetComPortConfig) (int portNumber, int *port, int *irq, int *baud, qboolean *useModem);
void (*SetComPortConfig) (int portNumber, int port, int irq, int baud, qboolean useModem);
void (*GetModemConfig) (int portNumber, char *dialType, char *clear, char *init, char *hangup);
void (*SetModemConfig) (int portNumber, char *dialType, char *clear, char *init, char *hangup);
static qboolean listening = false;
qboolean slistInProgress = false;
qboolean slistSilent = false;
qboolean slistLocal = true;
static double slistStartTime;
static int slistLastShown;
static void Slist_Send(void *);
static void Slist_Poll(void *);
PollProcedure slistSendProcedure = {nil, 0.0, Slist_Send};
PollProcedure slistPollProcedure = {nil, 0.0, Slist_Poll};
sizebuf_t net_message;
int net_activeconnections = 0;
int messagesSent = 0;
int messagesReceived = 0;
int unreliableMessagesSent = 0;
int unreliableMessagesReceived = 0;
cvar_t net_messagetimeout = {"net_messagetimeout","300"};
cvar_t hostname = {"hostname", "UNNAMED"};
qboolean configRestored = false;
cvar_t config_com_port = {"_config_com_port", "0x3f8", true};
cvar_t config_com_irq = {"_config_com_irq", "4", true};
cvar_t config_com_baud = {"_config_com_baud", "57600", true};
cvar_t config_com_modem = {"_config_com_modem", "1", true};
cvar_t config_modem_dialtype = {"_config_modem_dialtype", "T", true};
cvar_t config_modem_clear = {"_config_modem_clear", "ATZ", true};
cvar_t config_modem_init = {"_config_modem_init", "", true};
cvar_t config_modem_hangup = {"_config_modem_hangup", "AT H", true};
#ifdef IDGODS
cvar_t idgods = {"idgods", "0"};
#endif
// these two macros are to make the code more readable
#define sfunc net_drivers[sock->driver]
#define dfunc net_drivers[net_driverlevel]
int net_driverlevel;
double net_time;
double SetNetTime(void)
{
net_time = Sys_FloatTime();
return net_time;
}
/*
===================
NET_NewQSocket
Called by drivers when a new communications endpoint is required
The sequence and buffer fields will be filled in properly
===================
*/
qsocket_t *NET_NewQSocket (void)
{
qsocket_t *sock;
if (net_freeSockets == nil)
return nil;
if (net_activeconnections >= svs.maxclients)
return nil;
// get one from free list
sock = net_freeSockets;
net_freeSockets = sock->next;
// add it to active list
sock->next = net_activeSockets;
net_activeSockets = sock;
sock->disconnected = false;
sock->connecttime = net_time;
strcpy(sock->address,"UNSET ADDRESS");
sock->driver = net_driverlevel;
sock->socket = 0;
sock->driverdata = nil;
sock->canSend = true;
sock->sendNext = false;
sock->lastMessageTime = net_time;
sock->ackSequence = 0;
sock->sendSequence = 0;
sock->unreliableSendSequence = 0;
sock->sendMessageLength = 0;
sock->receiveSequence = 0;
sock->unreliableReceiveSequence = 0;
sock->receiveMessageLength = 0;
return sock;
}
void NET_FreeQSocket(qsocket_t *sock)
{
qsocket_t *s;
// remove it from active list
if (sock == net_activeSockets)
net_activeSockets = net_activeSockets->next;
else
{
for (s = net_activeSockets; s; s = s->next)
if (s->next == sock)
{
s->next = sock->next;
break;
}
if (!s)
fatal ("NET_FreeQSocket: not active\n");
}
// add it to free list
sock->next = net_freeSockets;
net_freeSockets = sock;
sock->disconnected = true;
}
static void NET_Listen_f (void)
{
if (Cmd_Argc () != 2)
{
Con_Printf ("\"listen\" is \"%ud\"\n", listening ? 1 : 0);
return;
}
listening = atoi(Cmd_Argv(1)) ? true : false;
for (net_driverlevel=0 ; net_driverlevel<net_numdrivers; net_driverlevel++)
{
if (net_drivers[net_driverlevel].initialized == false)
continue;
dfunc.Listen (listening);
}
}
static void MaxPlayers_f (void)
{
int n;
if (Cmd_Argc () != 2)
{
Con_Printf ("\"maxplayers\" is \"%ud\"\n", svs.maxclients);
return;
}
if (sv.active)
{
Con_Printf ("maxplayers can not be changed while a server is running.\n");
return;
}
n = atoi(Cmd_Argv(1));
if (n < 1)
n = 1;
if (n > svs.maxclientslimit)
{
n = svs.maxclientslimit;
Con_Printf ("\"maxplayers\" set to \"%ud\"\n", n);
}
if ((n == 1) && listening)
Cbuf_AddText ("listen 0\n");
if ((n > 1) && (!listening))
Cbuf_AddText ("listen 1\n");
svs.maxclients = n;
if (n == 1)
setcvar ("deathmatch", "0");
else
setcvar ("deathmatch", "1");
}
static void NET_Port_f (void)
{
int n;
if (Cmd_Argc () != 2)
{
Con_Printf ("\"port\" is \"%ud\"\n", net_hostport);
return;
}
n = atoi(Cmd_Argv(1));
if (n < 1 || n > 65534)
{
Con_Printf ("Bad value, must be between 1 and 65534\n");
return;
}
DEFAULTnet_hostport = n;
net_hostport = n;
if (listening)
{
// force a change to the new port
Cbuf_AddText ("listen 0\n");
Cbuf_AddText ("listen 1\n");
}
}
static void PrintSlistHeader(void)
{
Con_Printf("Server Map Users\n");
Con_Printf("--------------- --------------- -----\n");
slistLastShown = 0;
}
static void PrintSlist(void)
{
int n;
for (n = slistLastShown; n < hostCacheCount; n++)
{
if (hostcache[n].maxusers)
Con_Printf("%-15.15s %-15.15s %2ud/%2ud\n", hostcache[n].name, hostcache[n].map, hostcache[n].users, hostcache[n].maxusers);
else
Con_Printf("%-15.15s %-15.15s\n", hostcache[n].name, hostcache[n].map);
}
slistLastShown = n;
}
static void PrintSlistTrailer(void)
{
if (hostCacheCount)
Con_Printf("== end list ==\n\n");
else
Con_Printf("No Quake servers found.\n\n");
}
void NET_Slist_f (void)
{
if (slistInProgress)
return;
if (! slistSilent)
{
Con_Printf("Looking for Quake servers...\n");
PrintSlistHeader();
}
slistInProgress = true;
slistStartTime = Sys_FloatTime();
SchedulePollProcedure(&slistSendProcedure, 0.0);
SchedulePollProcedure(&slistPollProcedure, 0.1);
hostCacheCount = 0;
}
static void Slist_Send(void *)
{
for (net_driverlevel=0; net_driverlevel < net_numdrivers; net_driverlevel++)
{
if (!slistLocal && net_driverlevel == 0)
continue;
if (net_drivers[net_driverlevel].initialized == false)
continue;
dfunc.SearchForHosts (true);
}
if ((Sys_FloatTime() - slistStartTime) < 0.5)
SchedulePollProcedure(&slistSendProcedure, 0.75);
}
static void Slist_Poll(void *)
{
for (net_driverlevel=0; net_driverlevel < net_numdrivers; net_driverlevel++)
{
if (!slistLocal && net_driverlevel == 0)
continue;
if (net_drivers[net_driverlevel].initialized == false)
continue;
dfunc.SearchForHosts (false);
}
if (! slistSilent)
PrintSlist();
if ((Sys_FloatTime() - slistStartTime) < 1.5)
{
SchedulePollProcedure(&slistPollProcedure, 0.1);
return;
}
if (! slistSilent)
PrintSlistTrailer();
slistInProgress = false;
slistSilent = false;
slistLocal = true;
}
/*
===================
NET_Connect
===================
*/
int hostCacheCount = 0;
hostcache_t hostcache[HOSTCACHESIZE];
qsocket_t *NET_Connect (char *host)
{
qsocket_t *ret;
int n;
int numdrivers = net_numdrivers;
SetNetTime();
if (host && *host == 0)
host = nil;
if (host)
{
if(cistrcmp(host, "local") == 0)
{
numdrivers = 1;
goto JustDoIt;
}
if (hostCacheCount)
{
for (n = 0; n < hostCacheCount; n++)
if(cistrcmp(host, hostcache[n].name) == 0)
{
host = hostcache[n].cname;
break;
}
if (n < hostCacheCount)
goto JustDoIt;
}
}
slistSilent = host ? true : false;
NET_Slist_f ();
while(slistInProgress)
NET_Poll();
if (host == nil)
{
if (hostCacheCount != 1)
return nil;
host = hostcache[0].cname;
Con_Printf("Connecting to...\n%s @ %s\n\n", hostcache[0].name, host);
}
if (hostCacheCount)
for (n = 0; n < hostCacheCount; n++)
if(cistrcmp(host, hostcache[n].name) == 0)
{
host = hostcache[n].cname;
break;
}
JustDoIt:
for (net_driverlevel=0 ; net_driverlevel<numdrivers; net_driverlevel++)
{
if (net_drivers[net_driverlevel].initialized == false)
continue;
ret = dfunc.Connect (host);
if (ret)
return ret;
}
if (host)
{
Con_Printf("\n");
PrintSlistHeader();
PrintSlist();
PrintSlistTrailer();
}
return nil;
}
qsocket_t *NET_CheckNewConnections (void)
{
qsocket_t *ret;
SetNetTime();
for (net_driverlevel=0 ; net_driverlevel<net_numdrivers; net_driverlevel++)
{
if (net_drivers[net_driverlevel].initialized == false)
continue;
if (net_driverlevel && listening == false)
continue;
ret = dfunc.CheckNewConnections ();
if(ret)
return ret;
}
return nil;
}
/*
===================
NET_Close
===================
*/
void NET_Close (qsocket_t *sock)
{
if (!sock)
return;
if (sock->disconnected)
return;
SetNetTime();
// call the driver_Close function
sfunc.Close (sock);
NET_FreeQSocket(sock);
}
/*
=================
NET_GetMessage
If there is a complete message, return it in net_message
returns 0 if no data is waiting
returns 1 if a message was received
returns -1 if connection is invalid
=================
*/
extern void PrintStats(qsocket_t *s);
int NET_GetMessage (qsocket_t *sock)
{
int ret;
if (!sock)
return -1;
if (sock->disconnected)
{
Con_Printf("NET_GetMessage: disconnected socket\n");
return -1;
}
SetNetTime();
ret = sfunc.QGetMessage(sock);
// see if this connection has timed out
if (ret == 0 && sock->driver)
{
if (net_time - sock->lastMessageTime > net_messagetimeout.value)
{
NET_Close(sock);
return -1;
}
}
if (ret > 0)
{
if (sock->driver)
{
sock->lastMessageTime = net_time;
if (ret == 1)
messagesReceived++;
else if (ret == 2)
unreliableMessagesReceived++;
}
}
return ret;
}
/*
==================
NET_SendMessage
Try to send a complete length+message unit over the reliable stream.
returns 0 if the message cannot be delivered reliably, but the connection
is still considered valid
returns 1 if the message was sent properly
returns -1 if the connection died
==================
*/
int NET_SendMessage (qsocket_t *sock, sizebuf_t *data)
{
int r;
if (!sock)
return -1;
if (sock->disconnected)
{
Con_Printf("NET_SendMessage: disconnected socket\n");
return -1;
}
SetNetTime();
r = sfunc.QSendMessage(sock, data);
if (r == 1 && sock->driver)
messagesSent++;
return r;
}
int NET_SendUnreliableMessage (qsocket_t *sock, sizebuf_t *data)
{
int r;
if (!sock)
return -1;
if (sock->disconnected)
{
Con_Printf("NET_SendMessage: disconnected socket\n");
return -1;
}
SetNetTime();
r = sfunc.SendUnreliableMessage(sock, data);
if (r == 1 && sock->driver)
unreliableMessagesSent++;
return r;
}
/*
==================
NET_CanSendMessage
Returns true or false if the given qsocket can currently accept a
message to be transmitted.
==================
*/
qboolean NET_CanSendMessage (qsocket_t *sock)
{
int r;
if (!sock)
return false;
if (sock->disconnected)
return false;
SetNetTime();
r = sfunc.CanSendMessage(sock);
return r;
}
int NET_SendToAll(sizebuf_t *data, int blocktime)
{
double start;
int i;
int count = 0;
qboolean state1 [MAX_SCOREBOARD];
qboolean state2 [MAX_SCOREBOARD];
for (i=0, host_client = svs.clients ; i<svs.maxclients ; i++, host_client++)
{
if (!host_client->netconnection)
continue;
if (host_client->active)
{
if (host_client->netconnection->driver == 0)
{
NET_SendMessage(host_client->netconnection, data);
state1[i] = true;
state2[i] = true;
continue;
}
count++;
state1[i] = false;
state2[i] = false;
}
else
{
state1[i] = true;
state2[i] = true;
}
}
start = Sys_FloatTime();
while (count)
{
count = 0;
for (i=0, host_client = svs.clients ; i<svs.maxclients ; i++, host_client++)
{
if (! state1[i])
{
if (NET_CanSendMessage (host_client->netconnection))
{
state1[i] = true;
NET_SendMessage(host_client->netconnection, data);
}
else
{
NET_GetMessage (host_client->netconnection);
}
count++;
continue;
}
if (! state2[i])
{
if (NET_CanSendMessage (host_client->netconnection))
{
state2[i] = true;
}
else
{
NET_GetMessage (host_client->netconnection);
}
count++;
continue;
}
}
if ((Sys_FloatTime() - start) > blocktime)
break;
}
return count;
}
//=============================================================================
/*
====================
NET_Init
====================
*/
void NET_Init (void)
{
int i;
int controlSocket;
qsocket_t *s;
i = COM_CheckParm ("-port");
if (!i)
i = COM_CheckParm ("-udpport");
if (!i)
i = COM_CheckParm ("-ipxport");
if (i)
{
if (i < com_argc-1)
DEFAULTnet_hostport = atoi(com_argv[i+1]);
else
fatal ("NET_Init: you must specify a number after -port");
}
net_hostport = DEFAULTnet_hostport;
if (COM_CheckParm("-listen") || cls.state == ca_dedicated)
listening = true;
net_numsockets = svs.maxclientslimit;
if (cls.state != ca_dedicated)
net_numsockets++;
SetNetTime();
for (i = 0; i < net_numsockets; i++)
{
s = Hunk_AllocName(sizeof *s, "qsocket");
s->next = net_freeSockets;
net_freeSockets = s;
s->disconnected = true;
}
// allocate space for network message buffer
SZ_Alloc (&net_message, NET_MAXMESSAGE);
Cvar_RegisterVariable (&net_messagetimeout);
Cvar_RegisterVariable (&hostname);
Cvar_RegisterVariable (&config_com_port);
Cvar_RegisterVariable (&config_com_irq);
Cvar_RegisterVariable (&config_com_baud);
Cvar_RegisterVariable (&config_com_modem);
Cvar_RegisterVariable (&config_modem_dialtype);
Cvar_RegisterVariable (&config_modem_clear);
Cvar_RegisterVariable (&config_modem_init);
Cvar_RegisterVariable (&config_modem_hangup);
#ifdef IDGODS
Cvar_RegisterVariable (&idgods);
#endif
Cmd_AddCommand ("slist", NET_Slist_f);
Cmd_AddCommand ("listen", NET_Listen_f);
Cmd_AddCommand ("maxplayers", MaxPlayers_f);
Cmd_AddCommand ("port", NET_Port_f);
// initialize all the drivers
for (net_driverlevel=0 ; net_driverlevel<net_numdrivers ; net_driverlevel++)
{
controlSocket = net_drivers[net_driverlevel].Init();
if (controlSocket == -1)
continue;
net_drivers[net_driverlevel].initialized = true;
net_drivers[net_driverlevel].controlSock = controlSocket;
if (listening)
net_drivers[net_driverlevel].Listen (true);
}
if (*my_ipx_address)
print("IPX address %s\n", my_ipx_address);
if (*my_tcpip_address)
print("TCP/IP address %s\n", my_tcpip_address);
}
/*
====================
NET_Shutdown
====================
*/
void NET_Shutdown (void)
{
qsocket_t *sock;
SetNetTime();
for (sock = net_activeSockets; sock; sock = sock->next)
NET_Close(sock);
//
// shutdown the drivers
//
for (net_driverlevel = 0; net_driverlevel < net_numdrivers; net_driverlevel++)
{
if (net_drivers[net_driverlevel].initialized == true)
{
net_drivers[net_driverlevel].Shutdown ();
net_drivers[net_driverlevel].initialized = false;
}
}
}
static PollProcedure *pollProcedureList = nil;
void NET_Poll(void)
{
PollProcedure *pp;
qboolean useModem;
if (!configRestored)
{
if (serialAvailable)
{
if (config_com_modem.value == 1.0)
useModem = true;
else
useModem = false;
SetComPortConfig (0, (int)config_com_port.value, (int)config_com_irq.value, (int)config_com_baud.value, useModem);
SetModemConfig (0, config_modem_dialtype.string, config_modem_clear.string, config_modem_init.string, config_modem_hangup.string);
}
configRestored = true;
}
SetNetTime();
for (pp = pollProcedureList; pp; pp = pp->next)
{
if (pp->nextTime > net_time)
break;
pollProcedureList = pp->next;
pp->procedure(pp->arg);
}
}
void SchedulePollProcedure(PollProcedure *proc, double timeOffset)
{
PollProcedure *pp, *prev;
proc->nextTime = Sys_FloatTime() + timeOffset;
for (pp = pollProcedureList, prev = nil; pp; pp = pp->next)
{
if (pp->nextTime >= proc->nextTime)
break;
prev = pp;
}
if (prev == nil)
{
proc->next = pollProcedureList;
pollProcedureList = proc;
return;
}
proc->next = pp;
prev->next = proc;
}
#ifdef IDGODS
#define IDNET 0xc0f62800
qboolean IsID(struct qsockaddr *addr)
{
if (idgods.value == 0.0)
return false;
if (addr->sa_family != 2)
return false;
if ((BigLong(*(int *)&addr->sa_data[2]) & 0xffffff00) == IDNET)
return true;
return false;
}
#endif