/*
 * 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 qboolean 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);

        if ((r = pWSAStartup (MAKEWORD (1, 1), &winsockdata))) {
            // joe 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 (!strcmp (hostname.string, "UNNAMED")) {
            // 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) {
        // joe 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));
    if ((p = strrchr (my_ipx_address, ':')))
        *p = 0;

    // joe 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 (qboolean 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, 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           error = pWSAGetLastError ();

        if (error == WSAEWOULDBLOCK || error == 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;
    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);

    memset (addr, 0, sizeof (struct qsockaddr));
    if (pgetsockname (socket, (struct sockaddr *) addr, &addrlen) != 0) {
        int           error = 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 = 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;
}

// 
