quakeforge/libs/net/nm/net_wins.c

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/*
net_wins.c
Winsock lan driver.
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
static __attribute__ ((used)) const char rcsid[] =
"$Id$";
#include "winquake.h"
#include "QF/cvar.h"
#include "QF/qargs.h"
#include "QF/sys.h"
#include "compat.h"
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#include "netmain.h"
#define MAXHOSTNAMELEN 256
static int net_acceptsocket = -1; // socket for fielding new
// connections
static int net_controlsocket;
static int net_broadcastsocket = 0;
static struct qsockaddr broadcastaddr;
static unsigned long myAddr;
qboolean winsock_lib_initialized;
int (PASCAL FAR * pWSAStartup) (WORD wVersionRequired,
LPWSADATA lpWSAData);
int (PASCAL FAR * pWSACleanup) (void);
int (PASCAL FAR * pWSAGetLastError) (void);
SOCKET (PASCAL FAR * psocket) (int af, int type, int protocol);
int (PASCAL FAR * pioctlsocket) (SOCKET s, long cmd, u_long FAR * argp);
int (PASCAL FAR * psetsockopt) (SOCKET s, int level, int optname,
const char FAR * optval, int optlen);
int (PASCAL FAR * precvfrom) (SOCKET s, char FAR * buf, int len,
int flags, struct sockaddr FAR * from,
int FAR * fromlen);
int (PASCAL FAR * psendto) (SOCKET s, const char FAR * buf, int len,
int flags, const struct sockaddr FAR * to,
int tolen);
int (PASCAL FAR * pclosesocket) (SOCKET s);
int (PASCAL FAR * pgethostname) (char FAR * name, int namelen);
struct hostent FAR *(PASCAL FAR * pgethostbyname) (const char FAR * name);
struct hostent FAR *(PASCAL FAR * pgethostbyaddr) (const char FAR * addr,
int len, int type);
int (PASCAL FAR * pgetsockname) (SOCKET s, struct sockaddr FAR * name,
int FAR * namelen);
#include "net_wins.h"
int winsock_initialized = 0;
WSADATA winsockdata;
//=============================================================================
static double blocktime;
static BOOL PASCAL FAR
BlockingHook (void)
{
MSG msg;
BOOL ret;
if ((Sys_DoubleTime () - blocktime) > 2.0) {
WSACancelBlockingCall ();
return FALSE;
}
/* get the next message, if any */
ret = (BOOL) PeekMessage (&msg, NULL, 0, 0, PM_REMOVE);
/* if we got one, process it */
if (ret) {
TranslateMessage (&msg);
DispatchMessage (&msg);
}
/* TRUE if we got a message */
return ret;
}
static void
WINS_GetLocalAddress (void)
{
struct hostent *local = NULL;
char buff[MAXHOSTNAMELEN];
unsigned long addr;
if (myAddr != INADDR_ANY)
return;
if (pgethostname (buff, MAXHOSTNAMELEN) == SOCKET_ERROR)
return;
blocktime = Sys_DoubleTime ();
WSASetBlockingHook (BlockingHook);
local = pgethostbyname (buff);
WSAUnhookBlockingHook ();
if (local == NULL)
return;
myAddr = *(int *) local->h_addr_list[0];
addr = ntohl (myAddr);
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snprintf (my_tcpip_address, sizeof (my_tcpip_address), "%ld.%ld.%ld.%ld",
(addr >> 24) & 0xff, (addr >> 16) & 0xff, (addr >> 8) & 0xff,
addr & 0xff);
}
int
WINS_Init (void)
{
int i;
char buff[MAXHOSTNAMELEN];
char *p;
int r;
WORD wVersionRequested;
HINSTANCE hInst;
// initialize the Winsock function vectors (we do this instead of statically linking
// so we can run on Win 3.1, where there isn't necessarily Winsock)
hInst = LoadLibrary ("wsock32.dll");
if (hInst == NULL) {
Sys_Printf ("Failed to load winsock.dll\n");
winsock_lib_initialized = false;
return -1;
}
winsock_lib_initialized = true;
pWSAStartup = (void *) GetProcAddress (hInst, "WSAStartup");
pWSACleanup = (void *) GetProcAddress (hInst, "WSACleanup");
pWSAGetLastError = (void *) GetProcAddress (hInst, "WSAGetLastError");
psocket = (void *) GetProcAddress (hInst, "socket");
pioctlsocket = (void *) GetProcAddress (hInst, "ioctlsocket");
psetsockopt = (void *) GetProcAddress (hInst, "setsockopt");
precvfrom = (void *) GetProcAddress (hInst, "recvfrom");
psendto = (void *) GetProcAddress (hInst, "sendto");
pclosesocket = (void *) GetProcAddress (hInst, "closesocket");
pgethostname = (void *) GetProcAddress (hInst, "gethostname");
pgethostbyname = (void *) GetProcAddress (hInst, "gethostbyname");
pgethostbyaddr = (void *) GetProcAddress (hInst, "gethostbyaddr");
pgetsockname = (void *) GetProcAddress (hInst, "getsockname");
if (!pWSAStartup || !pWSACleanup || !pWSAGetLastError ||
!psocket || !pioctlsocket || !psetsockopt ||
!precvfrom || !psendto || !pclosesocket ||
!pgethostname || !pgethostbyname || !pgethostbyaddr || !pgetsockname) {
Sys_Printf ("Couldn't GetProcAddress from winsock.dll\n");
return -1;
}
if (COM_CheckParm ("-noudp"))
return -1;
if (winsock_initialized == 0) {
wVersionRequested = MAKEWORD (1, 1);
r = pWSAStartup (MAKEWORD (1, 1), &winsockdata);
if (r) {
Sys_Printf ("Winsock initialization failed.\n");
return -1;
}
}
winsock_initialized++;
// determine my name
if (pgethostname (buff, MAXHOSTNAMELEN) == SOCKET_ERROR) {
Sys_MaskPrintf (SYS_NET, "Winsock TCP/IP Initialization failed.\n");
if (--winsock_initialized == 0)
pWSACleanup ();
return -1;
}
// if the quake hostname isn't set, set it to the machine name
if (strcmp (hostname->string, "UNNAMED") == 0) {
// see if it's a text IP address (well, close enough)
for (p = buff; *p; p++)
if ((*p < '0' || *p > '9') && *p != '.')
break;
// if it is a real name, strip off the domain; we want only the host
if (*p) {
for (i = 0; i < 15; i++)
if (buff[i] == '.')
break;
buff[i] = 0;
}
Cvar_Set (hostname, buff);
}
i = COM_CheckParm ("-ip");
if (i) {
if (i < com_argc - 1) {
myAddr = inet_addr (com_argv[i + 1]);
if (myAddr == INADDR_NONE)
Sys_Error ("%s is not a valid IP address", com_argv[i + 1]);
strcpy (my_tcpip_address, com_argv[i + 1]);
} else {
Sys_Error ("NET_Init: you must specify an IP address after -ip");
}
} else {
myAddr = INADDR_ANY;
strcpy (my_tcpip_address, "INADDR_ANY");
}
if ((net_controlsocket = WINS_OpenSocket (0)) == -1) {
Sys_Printf ("WINS_Init: Unable to open control socket\n");
if (--winsock_initialized == 0)
pWSACleanup ();
return -1;
}
((struct sockaddr_in *) &broadcastaddr)->sin_family = AF_INET;
((struct sockaddr_in *) &broadcastaddr)->sin_addr.s_addr = INADDR_BROADCAST;
((struct sockaddr_in *) &broadcastaddr)->sin_port = htons ((unsigned short) net_hostport);
Sys_Printf ("Winsock TCP/IP Initialized\n");
tcpipAvailable = true;
return net_controlsocket;
}
//=============================================================================
void
WINS_Shutdown (void)
{
WINS_Listen (false);
WINS_CloseSocket (net_controlsocket);
if (--winsock_initialized == 0)
pWSACleanup ();
}
//=============================================================================
void
WINS_Listen (qboolean state)
{
// enable listening
if (state) {
if (net_acceptsocket != -1)
return;
WINS_GetLocalAddress ();
if ((net_acceptsocket = WINS_OpenSocket (net_hostport)) == -1)
Sys_Error ("WINS_Listen: Unable to open accept socket");
return;
}
// disable listening
if (net_acceptsocket == -1)
return;
WINS_CloseSocket (net_acceptsocket);
net_acceptsocket = -1;
}
//=============================================================================
int
WINS_OpenSocket (int port)
{
int newsocket;
struct sockaddr_in address;
u_long _true = 1;
if ((newsocket = psocket (PF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1)
return -1;
if (pioctlsocket (newsocket, FIONBIO, &_true) == -1)
goto ErrorReturn;
address.sin_family = AF_INET;
address.sin_addr.s_addr = myAddr;
address.sin_port = htons ((unsigned short) port);
if (bind (newsocket, (void *) &address, sizeof (address)) == 0)
return newsocket;
Sys_Error ("Unable to bind to %s",
WINS_AddrToString ((struct qsockaddr *) &address));
ErrorReturn:
pclosesocket (newsocket);
return -1;
}
//=============================================================================
int
WINS_CloseSocket (int socket)
{
if (socket == net_broadcastsocket)
net_broadcastsocket = 0;
return pclosesocket (socket);
}
//=============================================================================
/*
============
PartialIPAddress
this lets you type only as much of the net address as required, using
the local network components to fill in the rest
============
*/
static int
PartialIPAddress (const char *in, struct qsockaddr *hostaddr)
{
char buff[256];
char *b;
int addr;
int num;
int mask;
int run;
int port;
buff[0] = '.';
b = buff;
strcpy (buff + 1, in);
if (buff[1] == '.')
b++;
addr = 0;
mask = -1;
while (*b == '.') {
b++;
num = 0;
run = 0;
while (!(*b < '0' || *b > '9')) {
num = num * 10 + *b++ - '0';
if (++run > 3)
return -1;
}
if ((*b < '0' || *b > '9') && *b != '.' && *b != ':' && *b != 0)
return -1;
if (num < 0 || num > 255)
return -1;
mask <<= 8;
addr = (addr << 8) + num;
}
if (*b++ == ':')
port = atoi (b);
else
port = net_hostport;
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hostaddr->qsa_family = AF_INET;
((struct sockaddr_in *) hostaddr)->sin_port = htons ((short) port);
((struct sockaddr_in *) hostaddr)->sin_addr.s_addr =
(myAddr & htonl (mask)) | htonl (addr);
return 0;
}
//=============================================================================
int
WINS_Connect (int socket, struct qsockaddr *addr)
{
return 0;
}
//=============================================================================
int
WINS_CheckNewConnections (void)
{
char buf[4096];
if (net_acceptsocket == -1)
return -1;
if (precvfrom (net_acceptsocket, buf, sizeof (buf), MSG_PEEK, NULL, NULL) >=
0) {
return net_acceptsocket;
}
return -1;
}
//=============================================================================
int
WINS_Read (int socket, byte *buf, int len, struct qsockaddr *addr)
{
int addrlen = sizeof (struct qsockaddr);
int ret;
ret = precvfrom (socket, (char *) buf, len, 0, (struct sockaddr *) addr,
&addrlen);
if (ret == -1) {
int err = pWSAGetLastError ();
if (err == WSAEWOULDBLOCK || err == WSAECONNREFUSED)
return 0;
}
return ret;
}
//=============================================================================
static int
WINS_MakeSocketBroadcastCapable (int socket)
{
int i = 1;
// make this socket broadcast capable
if (psetsockopt (socket, SOL_SOCKET, SO_BROADCAST, (char *) &i, sizeof (i))
< 0)
return -1;
net_broadcastsocket = socket;
return 0;
}
//=============================================================================
int
WINS_Broadcast (int socket, byte * buf, int len)
{
int ret;
if (socket != net_broadcastsocket) {
if (net_broadcastsocket != 0)
Sys_Error ("Attempted to use multiple broadcasts sockets");
WINS_GetLocalAddress ();
ret = WINS_MakeSocketBroadcastCapable (socket);
if (ret == -1) {
Sys_Printf ("Unable to make socket broadcast capable\n");
return ret;
}
}
return WINS_Write (socket, buf, len, &broadcastaddr);
}
//=============================================================================
int
WINS_Write (int socket, byte *buf, int len, struct qsockaddr *addr)
{
int ret;
ret =
psendto (socket, (char *) buf, len, 0, (struct sockaddr *) addr,
sizeof (struct qsockaddr));
if (ret == -1)
if (pWSAGetLastError () == WSAEWOULDBLOCK)
return 0;
return ret;
}
//=============================================================================
const char *
WINS_AddrToString (struct qsockaddr *addr)
{
static char buffer[22];
int haddr;
haddr = ntohl (((struct sockaddr_in *) addr)->sin_addr.s_addr);
snprintf (buffer, sizeof (buffer), "%d.%d.%d.%d:%d", (haddr >> 24) & 0xff,
(haddr >> 16) & 0xff, (haddr >> 8) & 0xff, haddr & 0xff,
ntohs (((struct sockaddr_in *) addr)->sin_port));
return buffer;
}
//=============================================================================
int
WINS_GetSocketAddr (int socket, struct qsockaddr *addr)
{
int addrlen = sizeof (struct qsockaddr);
unsigned int a;
memset (addr, 0, sizeof (struct qsockaddr));
pgetsockname (socket, (struct sockaddr *) addr, &addrlen);
a = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
if (a == 0 || a == inet_addr ("127.0.0.1"))
((struct sockaddr_in *) addr)->sin_addr.s_addr = myAddr;
return 0;
}
//=============================================================================
int
WINS_GetNameFromAddr (struct qsockaddr *addr, char *name)
{
struct hostent *hostentry;
hostentry =
pgethostbyaddr ((char *) &((struct sockaddr_in *) addr)->sin_addr,
sizeof (struct in_addr), AF_INET);
if (hostentry) {
strncpy (name, (char *) hostentry->h_name, NET_NAMELEN - 1);
return 0;
}
strcpy (name, WINS_AddrToString (addr));
return 0;
}
//=============================================================================
int
WINS_GetAddrFromName (const char *name, struct qsockaddr *addr)
{
struct hostent *hostentry;
if (name[0] >= '0' && name[0] <= '9')
return PartialIPAddress (name, addr);
hostentry = pgethostbyname (name);
if (!hostentry)
return -1;
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addr->qsa_family = AF_INET;
((struct sockaddr_in *) addr)->sin_port = htons ((unsigned short) net_hostport);
((struct sockaddr_in *) addr)->sin_addr.s_addr =
*(int *) hostentry->h_addr_list[0];
return 0;
}
//=============================================================================
int
WINS_AddrCompare (struct qsockaddr *addr1, struct qsockaddr *addr2)
{
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if (addr1->qsa_family != addr2->qsa_family)
return -1;
if (((struct sockaddr_in *) addr1)->sin_addr.s_addr !=
((struct sockaddr_in *) addr2)->sin_addr.s_addr)
return -1;
if (((struct sockaddr_in *) addr1)->sin_port !=
((struct sockaddr_in *) addr2)->sin_port)
return 1;
return 0;
}
//=============================================================================
int
WINS_GetSocketPort (struct qsockaddr *addr)
{
return ntohs (((struct sockaddr_in *) addr)->sin_port);
}
int
WINS_SetSocketPort (struct qsockaddr *addr, int port)
{
((struct sockaddr_in *) addr)->sin_port = htons ((unsigned short) port);
return 0;
}
//=============================================================================