Subversion Repositories Kolibri OS

/*

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 the Free Software

Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

// net_wins.c

#include "quakedef.h"

#include "winquake.h"

extern cvar_t hostname;

#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;

BOOL PASCAL FAR BlockingHook(void)

{

    MSG		msg;

    BOOL	ret;

	if ((Sys_FloatTime() - 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;

}

void WINS_GetLocalAddress()

{

	struct hostent	*local = NULL;

	char			buff[MAXHOSTNAMELEN];

	unsigned long	addr;

	if (myAddr != INADDR_ANY)

		return;

	if (pgethostname(buff, MAXHOSTNAMELEN) == SOCKET_ERROR)

		return;

	blocktime = Sys_FloatTime();

	WSASetBlockingHook(BlockingHook);

	local = pgethostbyname(buff);

	WSAUnhookBlockingHook();

	if (local == NULL)

		return;

	myAddr = *(int *)local->h_addr_list[0];

	addr = ntohl(myAddr);

	sprintf(my_tcpip_address, "%d.%d.%d.%d", (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)

	{

		Con_SafePrintf ("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)

	{

		Con_SafePrintf ("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)

		{

			Con_SafePrintf ("Winsock initialization failed.\n");

			return -1;

		}

	}

	winsock_initialized++;

	// determine my name

	if (pgethostname(buff, MAXHOSTNAMELEN) == SOCKET_ERROR)

	{

		Con_DPrintf ("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 (Q_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 only want 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)

	{

		Con_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);

	Con_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\n");

		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 (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 = Q_atoi(b);

	else

		port = net_hostport;

	hostaddr->sa_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, buf, len, 0, (struct sockaddr *)addr, &addrlen);

	if (ret == -1)

	{

		int errno = pWSAGetLastError();

		if (errno == WSAEWOULDBLOCK || errno == WSAECONNREFUSED)

			return 0;

	}

	return ret;

}

//=============================================================================

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\n");

		WINS_GetLocalAddress();

		ret = WINS_MakeSocketBroadcastCapable (socket);

		if (ret == -1)

		{

			Con_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, buf, len, 0, (struct sockaddr *)addr, sizeof(struct qsockaddr));

	if (ret == -1)

		if (pWSAGetLastError() == WSAEWOULDBLOCK)

			return 0;

	return ret;

}

//=============================================================================

char *WINS_AddrToString (struct qsockaddr *addr)

{

	static char buffer[22];

	int haddr;

	haddr = ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr);

	sprintf(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_StringToAddr (char *string, struct qsockaddr *addr)

{

	int ha1, ha2, ha3, ha4, hp;

	int ipaddr;

	sscanf(string, "%d.%d.%d.%d:%d", &ha1, &ha2, &ha3, &ha4, &hp);

	ipaddr = (ha1 << 24) | (ha2 << 16) | (ha3 << 8) | ha4;

	addr->sa_family = AF_INET;

	((struct sockaddr_in *)addr)->sin_addr.s_addr = htonl(ipaddr);

	((struct sockaddr_in *)addr)->sin_port = htons((unsigned short)hp);

	return 0;

}

//=============================================================================

int WINS_GetSocketAddr (int socket, struct qsockaddr *addr)

{

	int addrlen = sizeof(struct qsockaddr);

	unsigned int a;

	Q_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)

	{

		Q_strncpy (name, (char *)hostentry->h_name, NET_NAMELEN - 1);

		return 0;

	}

	Q_strcpy (name, WINS_AddrToString (addr));

	return 0;

}

//=============================================================================

int WINS_GetAddrFromName(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;

	addr->sa_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)

{

	if (addr1->sa_family != addr2->sa_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;

}

//=============================================================================