/*
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); 

    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 (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;
  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;
}

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