ref: 2772ba4f6025cd091184c15675e29211c355b3a7
dir: /net_main.c/
#include "quakedef.h"
qsocket_t *net_activeSockets = nil;
qsocket_t *net_freeSockets = nil;
static int net_numsockets;
sizebuf_t net_message;
int net_activeconnections = 0;
int messagesSent = 0;
int messagesReceived = 0;
int unreliableMessagesSent = 0;
int unreliableMessagesReceived = 0;
static cvar_t net_messagetimeout = {"net_messagetimeout","300"};
cvar_t hostname = {"hostname", "UNNAMED"};
static Netdrv netdrv[MAX_NET_DRIVERS] = {
{
"Loopback",
false,
Loop_Init,
Loop_Connect,
Loop_CheckNewConnections,
Loop_GetMessage,
Loop_SendMessage,
Loop_SendUnreliableMessage,
Loop_CanSendMessage,
Loop_CanSendUnreliableMessage,
Loop_Close,
Loop_Shutdown
}
#ifdef __plan9__
,
{
"Datagram",
false,
Datagram_Init,
Datagram_Connect,
Datagram_CheckNewConnections,
Datagram_GetMessage,
Datagram_SendMessage,
Datagram_SendUnreliableMessage,
Datagram_CanSendMessage,
Datagram_CanSendUnreliableMessage,
Datagram_Close,
Datagram_Shutdown
}
#endif
};
static int net_numdrivers;
Landrv landrv[MAX_NET_DRIVERS] = {
#ifdef __plan9__
{
"UDP",
false,
UDP_Init,
UDP_Shutdown,
UDP_Connect,
udpread,
udpwrite,
UDP_AddrToString,
getip,
UDP_AddrCompare,
UDP_GetSocketPort,
UDP_SetSocketPort
}
#endif
};
int net_numlandrivers = 0;
// these two macros are to make the code more readable
#define sfunc netdrv[sock->driver]
#define dfunc netdrv[net_driverlevel]
int net_driverlevel;
double net_time;
double SetNetTime(void)
{
net_time = dtime();
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;
sock->addr.fd = -1;
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");
}
if(sock->addr.fd >= 0)
close(sock->addr.fd);
// add it to free list
sock->next = net_freeSockets;
net_freeSockets = sock;
sock->disconnected = true;
}
static void MaxPlayers_f (void)
{
int n;
if (Cmd_Argc () != 2)
{
Con_Printf ("\"maxplayers\" is \"%d\"\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 \"%d\"\n", 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 \"%s\"\n", myip.srv);
return;
}
if(sv.active){
Con_Printf("port cannot be changed while a server is running.\n");
return;
}
n = atoi(Cmd_Argv(1));
if (n < 1 || n > 65534)
{
Con_Printf ("Bad value, must be between 1 and 65534\n");
return;
}
snprint(myip.srv, sizeof myip.srv, "%d", n);
}
/*
===================
NET_Connect
===================
*/
qsocket_t *NET_Connect (char *host)
{
qsocket_t *ret;
int numdrivers = net_numdrivers;
SetNetTime();
if (host == nil || *host == 0)
return nil;
if(cistrcmp(host, "local") == 0)
numdrivers = 1;
for (net_driverlevel=0 ; net_driverlevel<numdrivers; net_driverlevel++)
{
if (netdrv[net_driverlevel].initialized == false)
continue;
ret = dfunc.Connect (host);
if (ret)
return ret;
}
return nil;
}
qsocket_t *NET_CheckNewConnections (void)
{
qsocket_t *ret;
SetNetTime();
for (net_driverlevel=0 ; net_driverlevel<net_numdrivers; net_driverlevel++)
{
if (netdrv[net_driverlevel].initialized == false)
continue;
if (net_driverlevel && !sv.active)
continue;
ret = dfunc.CheckNewConnections ();
if(ret)
return ret;
}
return nil;
}
/*
===================
NET_Close
===================
*/
void NET_Close (qsocket_t *sock)
{
if(sock == nil)
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)
{
Con_DPrintf("NET_GetMessage: sock %#p timed out\n", sock);
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_SendUnreliableMessage: 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.
==================
*/
bool 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;
bool state1 [MAX_SCOREBOARD];
bool 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 = dtime();
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 ((dtime() - start) > blocktime)
break;
}
return count;
}
//=============================================================================
/*
====================
NET_Init
====================
*/
void NET_Init (void)
{
int i;
qsocket_t *s;
net_numsockets = svs.maxclientslimit;
if (cls.state != ca_dedicated)
net_numsockets++;
SetNetTime();
for (i = 0; i < net_numsockets; i++)
{
s = Hunk_Alloc(sizeof *s);
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);
Cmd_AddCommand ("maxplayers", MaxPlayers_f);
Cmd_AddCommand ("port", NET_Port_f);
// initialize all the drivers
for(net_numdrivers=0; netdrv[net_numdrivers].Init; net_numdrivers++){
if(netdrv[net_numdrivers].Init() < 0)
continue;
netdrv[net_numdrivers].initialized = true;
}
}
/*
====================
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 (netdrv[net_driverlevel].initialized == true)
{
netdrv[net_driverlevel].Shutdown ();
netdrv[net_driverlevel].initialized = false;
}
}
}