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quakeforge/libs/net/net_main.c

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/*
net_main.c
@description@
Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include "QF/cbuf.h"
#include "QF/cmd.h"
#include "QF/cvar.h"
#include "QF/msg.h"
#include "QF/qargs.h"
#include "QF/quakeio.h"
#include "QF/sizebuf.h"
#include "QF/sys.h"
#include "netmain.h"
#include "net_vcr.h"
#include "../nq/include/server.h"
int net_is_dedicated = 0;
qsocket_t *net_activeSockets = NULL;
qsocket_t *net_freeSockets = NULL;
int net_numsockets = 0;
bool tcpipAvailable = false;
int net_hostport;
int DEFAULTnet_hostport = 26000;
char my_tcpip_address[NET_NAMELEN];
static bool listening = false;
bool slistInProgress = false;
bool slistSilent = false;
bool slistLocal = true;
static double slistStartTime;
static int slistLastShown;
static void Slist_Send (void *);
static void Slist_Poll (void *);
PollProcedure slistSendProcedure = { NULL, 0.0, Slist_Send };
PollProcedure slistPollProcedure = { NULL, 0.0, Slist_Poll };
static sizebuf_t _net_message_message;
static qmsg_t _net_message = { 0, 0, &_net_message_message };
qmsg_t *net_message = &_net_message;
unsigned net_activeconnections = 0;
int messagesSent = 0;
int messagesReceived = 0;
int unreliableMessagesSent = 0;
int unreliableMessagesReceived = 0;
float net_messagetimeout;
static cvar_t net_messagetimeout_cvar = {
.name = "net_messagetimeout",
.description =
"None",
.default_value = "300",
.flags = CVAR_NONE,
.value = { .type = &cexpr_float, .value = &net_messagetimeout },
};
char *hostname;
static cvar_t hostname_cvar = {
.name = "hostname",
.description =
"None",
.default_value = "UNNAMED",
.flags = CVAR_NONE,
.value = { .type = 0, .value = &hostname },
};
QFile *vcrFile;
bool recording = false;
// 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;
static int hostCacheCount = 0;
static hostcache_t hostcache[HOSTCACHESIZE];
static cbuf_t *net_cbuf;
double
SetNetTime (void)
{
net_time = Sys_DoubleTime ();
return net_time;
}
qsocket_t *
NET_NewQSocket (void)
{
qsocket_t *sock;
if (net_freeSockets == NULL)
return NULL;
if (net_activeconnections >= svs.maxclients)
return NULL;
// 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 = NULL;
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)
Sys_Error ("NET_FreeQSocket: not active");
}
// 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) {
Sys_Printf ("\"listen\" is \"%u\"\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)
{
unsigned n;
if (Cmd_Argc () != 2) {
Sys_Printf ("\"maxplayers\" is \"%u\"\n", svs.maxclients);
return;
}
if (sv.active) {
Sys_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;
Sys_Printf ("\"maxplayers\" set to \"%u\"\n", n);
}
if ((n == 1) && listening)
Cbuf_AddText (net_cbuf, "listen 0\n");
if ((n > 1) && (!listening))
Cbuf_AddText (net_cbuf, "listen 1\n");
svs.maxclients = n;
if (n == 1)
Cvar_Set ("deathmatch", "0");
else
Cvar_Set ("deathmatch", "1");
}
static void
NET_Port_f (void)
{
int n;
if (Cmd_Argc () != 2) {
Sys_Printf ("\"port\" is \"%u\"\n", net_hostport);
return;
}
n = atoi (Cmd_Argv (1));
if (n < 1 || n > 65534) {
Sys_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 (net_cbuf, "listen 0\n");
Cbuf_AddText (net_cbuf, "listen 1\n");
}
}
static void
PrintSlistHeader (void)
{
Sys_Printf ("Server Map Users\n");
Sys_Printf ("--------------- --------------- -----\n");
slistLastShown = 0;
}
void
NET_AddCachedHost (const char *name, const char *map, const char *cname,
int users, int maxusers, int driver, int ldriver,
const netadr_t *addr)
{
if (hostCacheCount == HOSTCACHESIZE) {
return;
}
for (int i = 0; i < hostCacheCount; i++) {
// addr will be 0 for loopback, and there can be only one loopback
// server.
if (!addr || !memcmp (addr, &hostcache[i].addr, sizeof (netadr_t))) {
return;
}
}
const int namesize = sizeof (hostcache[0].name) - 1;
const int mapsize = sizeof (hostcache[0].map) - 1;
const int cnamesize = sizeof (hostcache[0].cname) - 1;
hostcache_t *host = &hostcache[hostCacheCount++];
strncpy (host->name, name, namesize);
strncpy (host->map, map, mapsize);
strncpy (host->cname, cname, cnamesize);
host->name[namesize] = 0;
host->map[mapsize] = 0;
host->cname[cnamesize] = 0;
host->users = users;
host->maxusers = maxusers;
host->driver = driver;
host->ldriver = ldriver;
if (addr) {
host->addr = *addr;
} else {
memset (&host->addr, 0, sizeof (host->addr));
}
// check for and resolve name conflicts
for (int i = 0; i < hostCacheCount - 1; i++) {
if (strcasecmp (host->name, hostcache[i].name) == 0) {
int len = strlen (host->name);
if (len < namesize && host->name[len - 1] > '8') {
host->name[len] = '0';
host->name[len + 1] = 0;
} else {
host->name[len - 1]++;
}
i = -1; // restart loop
}
}
}
static void
PrintSlist (void)
{
int n;
for (n = slistLastShown; n < hostCacheCount; n++) {
if (hostcache[n].maxusers)
Sys_Printf ("%-15.15s %-15.15s %2u/%2u\n", hostcache[n].name,
hostcache[n].map, hostcache[n].users,
hostcache[n].maxusers);
else
Sys_Printf ("%-15.15s %-15.15s\n", hostcache[n].name,
hostcache[n].map);
}
slistLastShown = n;
}
static void
PrintSlistTrailer (void)
{
if (hostCacheCount)
Sys_Printf ("== end list ==\n\n");
else
Sys_Printf ("No Quake servers found.\n\n");
}
static void
NET_Slist_f (void)
{
if (slistInProgress)
return;
if (!slistSilent) {
Sys_Printf ("Looking for Quake servers...\n");
PrintSlistHeader ();
}
slistInProgress = true;
slistStartTime = Sys_DoubleTime ();
SchedulePollProcedure (&slistSendProcedure, 0.0);
SchedulePollProcedure (&slistPollProcedure, 0.1);
hostCacheCount = 0;
}
static void
Slist_Send (void *unused)
{
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_DoubleTime () - slistStartTime) < 0.5)
SchedulePollProcedure (&slistSendProcedure, 0.75);
}
static void
Slist_Poll (void *unused)
{
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_DoubleTime () - slistStartTime) < 1.5) {
SchedulePollProcedure (&slistPollProcedure, 0.1);
return;
}
if (!slistSilent)
PrintSlistTrailer ();
slistInProgress = false;
slistSilent = false;
slistLocal = true;
}
qsocket_t *
NET_Connect (const char *host)
{
qsocket_t *ret;
int n;
int numdrivers = net_numdrivers;
SetNetTime ();
if (host && *host == 0)
host = NULL;
if (host) {
if (strcasecmp (host, "local") == 0) {
numdrivers = 1;
goto JustDoIt;
}
if (hostCacheCount) {
for (n = 0; n < hostCacheCount; n++)
if (strcasecmp (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 == NULL) {
if (hostCacheCount != 1)
return NULL;
host = hostcache[0].cname;
Sys_Printf ("Connecting to...\n%s @ %s\n\n", hostcache[0].name, host);
}
if (hostCacheCount)
for (n = 0; n < hostCacheCount; n++)
if (strcasecmp (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) {
Sys_Printf ("\n");
PrintSlistHeader ();
PrintSlist ();
PrintSlistTrailer ();
}
return NULL;
}
struct {
double time;
int op;
intptr_t session;
} vcrConnect;
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) {
if (recording) {
vcrConnect.time = host_time;
vcrConnect.op = VCR_OP_CONNECT;
vcrConnect.session = (intptr_t) ret;
Qwrite (vcrFile, &vcrConnect, sizeof (vcrConnect));
Qwrite (vcrFile, ret->address, NET_NAMELEN);
}
return ret;
}
}
if (recording) {
vcrConnect.time = host_time;
vcrConnect.op = VCR_OP_CONNECT;
vcrConnect.session = 0;
Qwrite (vcrFile, &vcrConnect, sizeof (vcrConnect));
}
return NULL;
}
void
NET_Close (qsocket_t *sock)
{
if (!sock)
return;
if (sock->disconnected)
return;
SetNetTime ();
// call the driver_Close function
sfunc.Close (sock);
Sys_MaskPrintf (SYS_net, "closing socket\n");
NET_FreeQSocket (sock);
}
struct {
double time;
int op;
intptr_t session;
int ret;
int len;
} vcrGetMessage;
int
NET_GetMessage (qsocket_t *sock)
{
int ret;
if (!sock)
return -1;
if (sock->disconnected) {
Sys_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) {
Sys_MaskPrintf (SYS_net, "socket timed out\n");
NET_Close (sock);
return -1;
}
}
if (ret > 0) {
if (sock->driver) {
sock->lastMessageTime = net_time;
if (ret == 1)
messagesReceived++;
else if (ret == 2)
unreliableMessagesReceived++;
}
if (recording) {
vcrGetMessage.time = host_time;
vcrGetMessage.op = VCR_OP_GETMESSAGE;
vcrGetMessage.session = (intptr_t) sock;
vcrGetMessage.ret = ret;
vcrGetMessage.len = _net_message_message.cursize;
Qwrite (vcrFile, &vcrGetMessage, 24);
Qwrite (vcrFile, _net_message_message.data,
_net_message_message.cursize);
}
} else {
if (recording) {
vcrGetMessage.time = host_time;
vcrGetMessage.op = VCR_OP_GETMESSAGE;
vcrGetMessage.session = (intptr_t) sock;
vcrGetMessage.ret = ret;
Qwrite (vcrFile, &vcrGetMessage, 20);
}
}
return ret;
}
struct {
double time;
int op;
intptr_t session;
int r;
} vcrSendMessage;
int
NET_SendMessage (qsocket_t *sock, sizebuf_t *data)
{
int r;
if (!sock)
return -1;
if (sock->disconnected) {
Sys_Printf ("NET_SendMessage: disconnected socket\n");
return -1;
}
SetNetTime ();
r = sfunc.QSendMessage (sock, data);
if (r == 1 && sock->driver)
messagesSent++;
if (recording) {
vcrSendMessage.time = host_time;
vcrSendMessage.op = VCR_OP_SENDMESSAGE;
vcrSendMessage.session = (intptr_t) sock;
vcrSendMessage.r = r;
Qwrite (vcrFile, &vcrSendMessage, 20);
}
return r;
}
int
NET_SendUnreliableMessage (qsocket_t *sock, sizebuf_t *data)
{
int r;
if (!sock)
return -1;
if (sock->disconnected) {
Sys_Printf ("NET_SendMessage: disconnected socket\n");
return -1;
}
SetNetTime ();
r = sfunc.SendUnreliableMessage (sock, data);
if (r == 1 && sock->driver)
unreliableMessagesSent++;
if (recording) {
vcrSendMessage.time = host_time;
vcrSendMessage.op = VCR_OP_SENDMESSAGE;
vcrSendMessage.session = (intptr_t) sock;
vcrSendMessage.r = r;
Qwrite (vcrFile, &vcrSendMessage, 20);
}
return r;
}
bool
NET_CanSendMessage (qsocket_t *sock)
{
int r;
if (!sock)
return false;
if (sock->disconnected)
return false;
SetNetTime ();
r = sfunc.CanSendMessage (sock);
if (recording) {
vcrSendMessage.time = host_time;
vcrSendMessage.op = VCR_OP_CANSENDMESSAGE;
vcrSendMessage.session = (intptr_t) sock;
vcrSendMessage.r = r;
Qwrite (vcrFile, &vcrSendMessage, 20);
}
return r;
}
int
NET_SendToAll (sizebuf_t *data, double blocktime)
{
double start;
unsigned i;
int count = 0;
bool state1[MAX_SCOREBOARD]; /* can we send */
bool state2[MAX_SCOREBOARD]; /* did we send */
for (i = 0, host_client = svs.clients; i < svs.maxclients;
i++, host_client++) {
if (host_client->netconnection && 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_DoubleTime ();
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_DoubleTime () - start) > blocktime)
break;
}
return count;
}
//=============================================================================
static void
NET_shutdown (void *data)
{
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;
}
}
if (vcrFile) {
Sys_Printf ("Closing vcrfile.\n");
Qclose (vcrFile);
}
}
void
NET_Init (cbuf_t *cbuf)
{
int i;
int controlSocket;
qsocket_t *s;
net_cbuf = cbuf;
Sys_RegisterShutdown (NET_shutdown, 0);
if (COM_CheckParm ("-playback")) {
net_numdrivers = 1;
net_drivers[0].Init = VCR_Init;
}
if (COM_CheckParm ("-record"))
recording = true;
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
Sys_Error ("NET_Init: you must specify a number after -port");
}
net_hostport = DEFAULTnet_hostport;
if (COM_CheckParm ("-listen") || net_is_dedicated)
listening = true;
net_numsockets = svs.maxclientslimit;
if (!net_is_dedicated)
net_numsockets++;
SetNetTime ();
for (i = 0; i < net_numsockets; i++) {
s = (qsocket_t *) Hunk_AllocName (0, sizeof (qsocket_t), "qsocket");
s->next = net_freeSockets;
net_freeSockets = s;
s->disconnected = true;
}
// allocate space for network message buffer
SZ_Alloc (&_net_message_message, NET_MAXMESSAGE);
Cvar_Register (&net_messagetimeout_cvar, 0, 0);
Cvar_Register (&hostname_cvar, 0, 0);
Cmd_AddCommand ("slist", NET_Slist_f, "No Description");
Cmd_AddCommand ("listen", NET_Listen_f, "No Description");
Cmd_AddCommand ("maxplayers", MaxPlayers_f, "No Description");
Cmd_AddCommand ("port", NET_Port_f, "No Description");
// 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_tcpip_address)
Sys_MaskPrintf (SYS_net, "TCP/IP address %s\n", my_tcpip_address);
}
static PollProcedure *pollProcedureList = NULL;
void
NET_Poll (void)
{
PollProcedure *pp;
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_DoubleTime () + timeOffset;
for (pp = pollProcedureList, prev = NULL; pp; pp = pp->next) {
if (pp->nextTime >= proc->nextTime)
break;
prev = pp;
}
if (prev == NULL) {
proc->next = pollProcedureList;
pollProcedureList = proc;
return;
}
proc->next = pp;
prev->next = proc;
}
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