/*
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_wipx.c

#include "quakedef.h"
#include "winquake.h"
#include <wsipx.h>
#include "net_wipx.h"

extern cvar_t hostname;

#define MAXHOSTNAMELEN		256

static int net_acceptsocket = -1;		// socket for fielding new connections
static int net_controlsocket;
static struct qsockaddr broadcastaddr;

extern bool winsock_initialized;
extern WSADATA		winsockdata;

#define IPXSOCKETS 18
static int ipxsocket[IPXSOCKETS];
static int sequence[IPXSOCKETS];

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

int WIPX_Init (void)
{
	int		i;
	char	buff[MAXHOSTNAMELEN];
	struct qsockaddr addr;
	char	*p;
	int		r;
	WORD	wVersionRequested;
	
	if (COM_CheckParm ("-noipx"))
		return -1;
		
// make sure LoadLibrary has happened successfully
	if (!winsock_lib_initialized)
		return -1;
		
	if (winsock_initialized == 0)
	{
		wVersionRequested = MAKEWORD (1, 1);
		
		r = pWSAStartup (MAKEWORD (1, 1), &winsockdata);
		
		if (r)
		{
			Con_Printf ("Winsock initialization failed.\n");
			return -1;
		}
	}
	winsock_initialized++;
	
	for (i = 0; i < IPXSOCKETS; i++)
		ipxsocket[i] = 0;
		
	// determine my name & address
	if (pgethostname (buff, MAXHOSTNAMELEN) == 0)
	{
		// 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);
		}
	}
	
	if ( (net_controlsocket = WIPX_OpenSocket (0)) == -1)
	{
		Con_Printf ("WIPX_Init: Unable to open control socket\n");
		if (--winsock_initialized == 0)
			pWSACleanup ();
		return -1;
	}
	
	( (struct sockaddr_ipx *) &broadcastaddr)->sa_family = AF_IPX;
	memset ( ( (struct sockaddr_ipx *) &broadcastaddr)->sa_netnum, 0, 4);
	memset ( ( (struct sockaddr_ipx *) &broadcastaddr)->sa_nodenum, 0xff, 6);
	( (struct sockaddr_ipx *) &broadcastaddr)->sa_socket = htons ( (unsigned short) net_hostport);
	
	WIPX_GetSocketAddr (net_controlsocket, &addr);
	Q_strcpy (my_ipx_address,  WIPX_AddrToString (&addr));
	p = Q_strrchr (my_ipx_address, ':');
	if (p)
		*p = 0;
		
	Con_Printf ("Winsock IPX Initialized\n");
	ipxAvailable = true;
	
	return net_controlsocket;
}

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

void WIPX_Shutdown (void)
{
	WIPX_Listen (false);
	WIPX_CloseSocket (net_controlsocket);
	if (--winsock_initialized == 0)
		pWSACleanup ();
}

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

void WIPX_Listen (bool state)
{
	// enable listening
	if (state)
	{
		if (net_acceptsocket != -1)
			return;
		if ( (net_acceptsocket = WIPX_OpenSocket (net_hostport)) == -1)
			Sys_Error ("WIPX_Listen: Unable to open accept socket\n");
		return;
	}
	
	// disable listening
	if (net_acceptsocket == -1)
		return;
	WIPX_CloseSocket (net_acceptsocket);
	net_acceptsocket = -1;
}

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

int WIPX_OpenSocket (int port)
{
	int handle;
	int newsocket;
	struct sockaddr_ipx address;
	u_long _true = 1;
	
	for (handle = 0; handle < IPXSOCKETS; handle++)
		if (ipxsocket[handle] == 0)
			break;
	if (handle == IPXSOCKETS)
		return -1;
		
	if ( (newsocket = psocket (AF_IPX, SOCK_DGRAM, NSPROTO_IPX)) == INVALID_SOCKET)
		return -1;
		
	if (pioctlsocket (newsocket, FIONBIO, &_true) == -1)
		goto ErrorReturn;
		
	if (psetsockopt (newsocket, SOL_SOCKET, SO_BROADCAST, (char *) &_true, sizeof (_true)) < 0)
		goto ErrorReturn;
		
	address.sa_family = AF_IPX;
	memset (address.sa_netnum, 0, 4);
	memset (address.sa_nodenum, 0, 6);;
	address.sa_socket = htons ( (unsigned short) port);
	if (bind (newsocket, (void *) &address, sizeof (address)) == 0)
	{
		ipxsocket[handle] = newsocket;
		sequence[handle] = 0;
		return handle;
	}
	
	Sys_Error ("Winsock IPX bind failed\n");
ErrorReturn:
	pclosesocket (newsocket);
	return -1;
}

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

int WIPX_CloseSocket (int handle)
{
	int socket = ipxsocket[handle];
	int ret;
	
	ret =  pclosesocket (socket);
	ipxsocket[handle] = 0;
	return ret;
}


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

int WIPX_Connect (int handle, struct qsockaddr *addr)
{
	return 0;
}

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

int WIPX_CheckNewConnections (void)
{
	unsigned long	available;
	
	if (net_acceptsocket == -1)
		return -1;
		
	if (pioctlsocket (ipxsocket[net_acceptsocket], FIONREAD, &available) == -1)
		Sys_Error ("WIPX: ioctlsocket (FIONREAD) failed\n");
	if (available)
		return net_acceptsocket;
	return -1;
}

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

static byte packetBuffer[NET_DATAGRAMSIZE + 4];

int WIPX_Read (int handle, byte *buf, int len, struct qsockaddr *addr)
{
	int addrlen = sizeof (struct qsockaddr);
	int socket = ipxsocket[handle];
	int ret;
	
	ret = precvfrom (socket, packetBuffer, len + 4, 0, (struct sockaddr *) addr, &addrlen);
	if (ret == -1)
	{
		int errno = pWSAGetLastError();
		
		if (errno == WSAEWOULDBLOCK || errno == WSAECONNREFUSED)
			return 0;
			
	}
	
	if (ret < 4)
		return 0;
		
	// remove sequence number, it's only needed for DOS IPX
	ret -= 4;
	memcpy (buf, packetBuffer + 4, ret);
	
	return ret;
}

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

int WIPX_Broadcast (int handle, byte *buf, int len)
{
	return WIPX_Write (handle, buf, len, &broadcastaddr);
}

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

int WIPX_Write (int handle, byte *buf, int len, struct qsockaddr *addr)
{
	int socket = ipxsocket[handle];
	int ret;
	
	// build packet with sequence number
	* (int *) (&packetBuffer[0]) = sequence[handle];
	sequence[handle]++;
	memcpy (&packetBuffer[4], buf, len);
	len += 4;
	
	ret = psendto (socket, packetBuffer, len, 0, (struct sockaddr *) addr, sizeof (struct qsockaddr));
	if (ret == -1)
		if (pWSAGetLastError() == WSAEWOULDBLOCK)
			return 0;
			
	return ret;
}

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

char *WIPX_AddrToString (struct qsockaddr *addr)
{
	static char buf[28];
	
	sprintf (buf, "%02x%02x%02x%02x:%02x%02x%02x%02x%02x%02x:%u",
			 ( (struct sockaddr_ipx *) addr)->sa_netnum[0] & 0xff,
			 ( (struct sockaddr_ipx *) addr)->sa_netnum[1] & 0xff,
			 ( (struct sockaddr_ipx *) addr)->sa_netnum[2] & 0xff,
			 ( (struct sockaddr_ipx *) addr)->sa_netnum[3] & 0xff,
			 ( (struct sockaddr_ipx *) addr)->sa_nodenum[0] & 0xff,
			 ( (struct sockaddr_ipx *) addr)->sa_nodenum[1] & 0xff,
			 ( (struct sockaddr_ipx *) addr)->sa_nodenum[2] & 0xff,
			 ( (struct sockaddr_ipx *) addr)->sa_nodenum[3] & 0xff,
			 ( (struct sockaddr_ipx *) addr)->sa_nodenum[4] & 0xff,
			 ( (struct sockaddr_ipx *) addr)->sa_nodenum[5] & 0xff,
			 ntohs ( ( (struct sockaddr_ipx *) addr)->sa_socket)
			);
	return buf;
}

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

int WIPX_StringToAddr (char *string, struct qsockaddr *addr)
{
	int  val;
	char buf[3];
	
	buf[2] = 0;
	Q_memset (addr, 0, sizeof (struct qsockaddr));
	addr->sa_family = AF_IPX;
	
#define DO(src,dest)	\
	buf[0] = string[src];	\
	buf[1] = string[src + 1];	\
	if (sscanf (buf, "%x", &val) != 1)	\
		return -1;	\
	((struct sockaddr_ipx *)addr)->dest = val
	
	DO (0, sa_netnum[0]);
	DO (2, sa_netnum[1]);
	DO (4, sa_netnum[2]);
	DO (6, sa_netnum[3]);
	DO (9, sa_nodenum[0]);
	DO (11, sa_nodenum[1]);
	DO (13, sa_nodenum[2]);
	DO (15, sa_nodenum[3]);
	DO (17, sa_nodenum[4]);
	DO (19, sa_nodenum[5]);
#undef DO
	
	sscanf (&string[22], "%u", &val);
	( (struct sockaddr_ipx *) addr)->sa_socket = htons ( (unsigned short) val);
	
	return 0;
}

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

int WIPX_GetSocketAddr (int handle, struct qsockaddr *addr)
{
	int socket = ipxsocket[handle];
	int addrlen = sizeof (struct qsockaddr);
	unsigned int a;
	
	Q_memset (addr, 0, sizeof (struct qsockaddr));
	if (pgetsockname (socket, (struct sockaddr *) addr, &addrlen) != 0)
	{
		int errno = pWSAGetLastError();
	}
	
	return 0;
}

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

int WIPX_GetNameFromAddr (struct qsockaddr *addr, char *name)
{
	Q_strcpy (name, WIPX_AddrToString (addr));
	return 0;
}

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

int WIPX_GetAddrFromName (char *name, struct qsockaddr *addr)
{
	int n;
	char buf[32];
	
	n = Q_strlen (name);
	
	if (n == 12)
	{
		sprintf (buf, "00000000:%s:%u", name, net_hostport);
		return WIPX_StringToAddr (buf, addr);
	}
	if (n == 21)
	{
		sprintf (buf, "%s:%u", name, net_hostport);
		return WIPX_StringToAddr (buf, addr);
	}
	if (n > 21 && n <= 27)
		return WIPX_StringToAddr (name, addr);
		
	return -1;
}

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

int WIPX_AddrCompare (struct qsockaddr *addr1, struct qsockaddr *addr2)
{
	if (addr1->sa_family != addr2->sa_family)
		return -1;
		
	if (* ( (struct sockaddr_ipx *) addr1)->sa_netnum && * ( (struct sockaddr_ipx *) addr2)->sa_netnum)
		if (memcmp ( ( (struct sockaddr_ipx *) addr1)->sa_netnum, ( (struct sockaddr_ipx *) addr2)->sa_netnum, 4) != 0)
			return -1;
	if (memcmp ( ( (struct sockaddr_ipx *) addr1)->sa_nodenum, ( (struct sockaddr_ipx *) addr2)->sa_nodenum, 6) != 0)
		return -1;
		
	if ( ( (struct sockaddr_ipx *) addr1)->sa_socket != ( (struct sockaddr_ipx *) addr2)->sa_socket)
		return 1;
		
	return 0;
}

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

int WIPX_GetSocketPort (struct qsockaddr *addr)
{
	return ntohs ( ( (struct sockaddr_ipx *) addr)->sa_socket);
}


int WIPX_SetSocketPort (struct qsockaddr *addr, int port)
{
	( (struct sockaddr_ipx *) addr)->sa_socket = htons ( (unsigned short) port);
	return 0;
}

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