quakeforge/nq/source/mplpc.c

/*
	mplpc.c

	@description@

	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

	$Id$
*/

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <go32.h>
#include "mpdosock.h"

//#include "types.h"
typedef unsigned char BYTE;
typedef unsigned short WORD;
typedef unsigned long DWORD;

//#include "lpc.h"
typedef struct {
	short       version;				// version of LPC requested
	short       sizeOfArgs;				// size of arguments
	short       service;				// service # requested
	char        Data[1];				// data
} LPCData;

typedef struct {
	short       version;				// LPC version
	short       sizeOfReturn;			// return data size
	short       error;					// any error codes
	short       noRet;					// number of returns
	char        Data[1];				// data
} LPCReturn;

//#include "services.h"
#define  MAXSOCKETS  20

// services
#define LPC_SOCKBIND        4
#define LPC_SOCKGETHOSTBYNAME   5
#define LPC_SOCKGETHOSTNAME     6
#define LPC_SOCKGETHOSTBYADDR   7
#define LPC_SOCKCLOSE           8
#define LPC_SOCKSOCKET          9
#define LPC_SOCKRECVFROM        10
#define LPC_SOCKSENDTO          11
#define LPC_SOCKIOCTL           12
#define LPC_SOCKGETSOCKNAME     13
#define LPC_SOCKFLUSH           14
#define LPC_SOCKSETOPT          15
#define LPC_SOCKGETLASTERROR    16
#define LPC_SOCKINETADDR        17

// htons, ntohs, htonl, ntohl implemented locally

// errors
#define LPC_UNRECOGNIZED_SERVICE  -1
#define LPC_NOERROR                0

// structures for support
typedef struct {
	SOCKET      s;
	int         namelen;
	char        name[1];
} BindArgs;

typedef struct {
	SOCKET      s;
	long        cmd;
	char        data[1];
} IoctlArgs;

typedef struct {
	int         retVal;
	int         namelen;
	char        name[1];
} GetSockNameRet;

typedef GetSockNameRet GetHostNameRet;

typedef struct {
	int         retVal;
	int         h_addr_0;				// that's the only important value
} GetHostByNameRet;

typedef struct {
	int         len;
	int         type;
	char        addr[1];
} GetHostByAddrArgs;

typedef struct {
	int         retVal;
	char        h_name[1];				// h_name is the only important value
} GetHostByAddrRet;

typedef struct {
	SOCKET      s;
	int         flags;
} RecvFromArgs;

typedef struct {
	int         retVal;
	int         errCode;
	int         len;					// message len
	struct sockaddr sockaddr;
	int         sockaddrlen;
	char        Data[1];
} RecvFromRet;

typedef struct {
	SOCKET      s;
	int         flags;
	int         len;
	struct sockaddr sockaddr;
	int         sockaddrlen;
	char        Data[1];
} SendToArgs;

typedef struct {
	int         retVal;
	int         errCode;
} SendToRet;

typedef struct {
	int         bufflen;
	SOCKET      s;
	int         len;
	int         sockaddrlen;
	struct sockaddr address;
	char        data[1];
} SocketChannelData;

typedef struct {
	int         af;
	int         type;
	int         protocol;
} SocketArgs;

typedef struct {
	SOCKET      s;
	int         len;
	int         flags;
	int         addrlen;
	struct sockaddr addr;
	char        data[1];
} WinSockData;

typedef struct {
	SOCKET      s;
	int         level;
	int         optname;
	int         optlen;
	char        optval[1];
} SetSockOptArgs;

typedef struct {
	SOCKET      sock[MAXSOCKETS];
} SocketMap;

//#include "rtq.h"
#define RTQ_NODE struct rtq_node

RTQ_NODE {
	RTQ_NODE   *self;					// Ring zero address of this node
	RTQ_NODE   *left;					// Ring zero address of preceding

	// node
	RTQ_NODE   *right;					// Ring zero address of succeding

	// node
	BYTE       *rtqDatum;				// Ring 3 Datum of Buffer (start of

	// preface)
	BYTE       *rtqInsert;				// Ring 3 insertion position
	WORD        rtqLen;					// Length of buffer, excluding

	// preface
	WORD        rtqUpCtr;				// Up Counter of bytes used so far
	WORD        rtqQCtr;				// number of nodes attached
	WORD        padding;				// DWORD alignment
};

#define RTQ_PARAM_MOVENODE struct rtq_param_movenode
RTQ_PARAM_MOVENODE {
	WORD        rtqFromDQ;
	WORD        rtqToDQ;
};

RTQ_NODE   *rtq_fetch (RTQ_NODE *, RTQ_NODE *);	// To, From

//#include "mplib.h"
// give up time slice
void        Yield (void);
void        MGenWakeupDll (void);

// post a message to win32 side
void        PostWindowsMessage (void);

// get # of items on qNo
int         MGenGetQueueCtr (int qNo);

// move first node from qFrom to qTo
RTQ_NODE   *MGenMoveTo (int qFrom, int qTo);

// get first node from q
RTQ_NODE   *MGenGetNode (int q);

// get master node, returning size of RTQ_NODE for size verification
RTQ_NODE   *MGenGetMasterNode (unsigned *size);

// move all nodes from qFrom to qTo
RTQ_NODE   *MGenFlushNodes (int qFrom, int qTo);

// count number of nodes in queues designated by bitmask
// lowerOrderBits == 0..31, upperOrderBits == 32-63
int         MGenMCount (unsigned lowerOrderBits, unsigned upperOrderBits);

// perform consistency check on chunnel address space
int         MGenSanityCheck (void);

#include <stdio.h>
#include <sys/farptr.h>

extern short flat_selector;

#define SOCKET_MAP_QUEUE  41

#define IDLE_QUEUE    44
#define REC_QUEUE     45
#define SEND_QUEUE    46

//  queue sizes
#define FREEQBASE      58
#define FREEQ64        58
#define FREEQ128       59
#define FREEQ256       60
#define FREEQ512       61
#define FREEQ1024      62
#define FREEQ2048      63

#define NFREEQ         6

#define QLIMIT         10

#define PRIVATEQ       50

#define FARPKL(x)  (_farnspeekl((unsigned long) x))
#define FARPKB(x)  (_farnspeekb((unsigned long) x))
#define FARPKS(x)  (_farnspeekw((unsigned long) x))

#define FARPOKL(x, y) (_farnspokel((unsigned long) x, (unsigned long) y))
#define FARPOKB(x, y) (_farnspokeb((unsigned long) x, (unsigned char) y))

int         Qsizes[] = { 64, 128, 256, 512, 1024, 2048 };

int         SocketError = 0;

SocketMap  *SockMap;

#define HOSTENT_ALIAS_LIMIT    5
#define HOSTENT_STRLEN_LIMIT   50
#define HOSTENT_ADDR_LIST_LIMIT   5

struct hostent HostEnt;

char        HostEnt_hname[HOSTENT_STRLEN_LIMIT];
char       *HostEnt_h_aliases[HOSTENT_ALIAS_LIMIT];
char        HostEnt_names[HOSTENT_ALIAS_LIMIT][HOSTENT_STRLEN_LIMIT];
struct in_addr *HostEnt_addr_list[HOSTENT_ADDR_LIST_LIMIT];
struct in_addr HostEnt_addrs[HOSTENT_ADDR_LIST_LIMIT];

void
fmemcpyto (void *to, const void *from, int length)
{
	movedata (_my_ds (), (unsigned) from, flat_selector, (unsigned) to, length);
}

void
fmemcpyfrom (void *to, const void *from, int length)
{
	movedata (flat_selector, (unsigned) from, _my_ds (), (unsigned) to, length);
}

void
fstrcpyto (char *to, const char *from)
{
	while (*from) {
		FARPOKB (to, *from);
		to++;
		from++;
	}
	FARPOKB (to, 0);
}

void
fstrncpyto (char *to, const char *from, int len)
{
	while (*from && len) {
		FARPOKB (to, *from);
		to++;
		from++;
		len--;
	}
	FARPOKB (to, 0);
}

void
fstrcpyfrom (char *to, const char *from)
{
	while (FARPKB (from)) {
		*to = FARPKB (from);
		from++;
		to++;
	}
	*to = 0;
}

void
fstrncpyfrom (char *to, const char *from, int len)
{
	while (FARPKB (from) && len) {
		*to = FARPKB (from);
		from++;
		to++;
		len--;
	}
	*to = 0;
}

void
GetSocketMap (void)
{
	RTQ_NODE   *n = MGenGetNode (SOCKET_MAP_QUEUE);

	SockMap = (SocketMap *) FARPKL (&n->rtqDatum);
}

void       *
GetFreeBufferToQueue (int q, int bufSize)
{
	int         i;

	for (i = 0; i < NFREEQ; i++) {
		if (Qsizes[i] >= bufSize && MGenGetQueueCtr (i + FREEQBASE)) {
			RTQ_NODE   *n = MGenMoveTo (i + FREEQBASE, q);

			if (!n)
				continue;
			FARPOKL (&n->rtqUpCtr, bufSize);
			return (void *) FARPKL (&n->rtqDatum);
		}
	}

	return 0;
}

void
FreeBufferFromQueue (int q)
{
	int         i;
	RTQ_NODE   *n = MGenGetNode (q);

	for (i = 0; i < NFREEQ; i++) {
		if (Qsizes[i] == FARPKS (&n->rtqLen)) {
			MGenMoveTo (q, i + FREEQBASE);
			return;
		}
	}
}

void
SetLPCData (LPCData * lpc)
{

	FARPOKL (&(lpc->version), 1);
	FARPOKL (&(lpc->sizeOfArgs), 0);
	FARPOKL (&(lpc->service), 0);
}

int
bind (SOCKET s, const struct sockaddr *name, int namelen)
{
	RTQ_NODE   *n = MGenGetNode (IDLE_QUEUE);
	LPCData    *p;
	LPCReturn  *r;
	BindArgs   *bargs;
	int         retVal;

	_farsetsel (flat_selector);
	SocketError = 0;
	p = (LPCData *) FARPKL (&n->rtqDatum);
	SetLPCData (p);
	FARPOKL (&p->service, LPC_SOCKBIND);
	bargs = (BindArgs *) p->Data;
	FARPOKL (&bargs->s, s);
	FARPOKL (&bargs->namelen, namelen);
	fmemcpyto (bargs->name, name, namelen);
	MGenMoveTo (IDLE_QUEUE, SEND_QUEUE);
	PostWindowsMessage ();

	while ((n = MGenGetNode (REC_QUEUE)) == 0)
		Yield ();

	r = (LPCReturn *) FARPKL (&n->rtqDatum);

	if (FARPKS (&r->error) != LPC_NOERROR) {
		return -1;
	}

	retVal = FARPKL (r->Data);

	// get ready for next call
	MGenMoveTo (REC_QUEUE, IDLE_QUEUE);

	return retVal;
}

int
closesocket (SOCKET s)
{
	RTQ_NODE   *n = MGenGetNode (IDLE_QUEUE);
	LPCData    *p;
	LPCReturn  *r;
	int         retVal;

	_farsetsel (flat_selector);
	SocketError = 0;
	p = (LPCData *) FARPKL (&n->rtqDatum);
	SetLPCData (p);
	FARPOKL (&p->service, LPC_SOCKCLOSE);
	FARPOKL (p->Data, s);

	MGenMoveTo (IDLE_QUEUE, SEND_QUEUE);
	PostWindowsMessage ();

	while ((n = MGenGetNode (REC_QUEUE)) == 0)
		Yield ();

	r = (LPCReturn *) FARPKL (&n->rtqDatum);

	if (FARPKS (&r->error) != LPC_NOERROR) {
		return -1;
	}

	retVal = FARPKL (r->Data);

	// get ready for next call
	MGenMoveTo (REC_QUEUE, IDLE_QUEUE);

	return retVal;
}

void
ZapHostEnt ()
{
	// do nothing
}

void
ReconstructHostEnt (struct hostent *s, void *flattened)
{
	struct hostent *old = (struct hostent *) flattened;
	int         i;
	char      **ptr;


	s->h_name = HostEnt_hname;
	fstrncpyfrom (s->h_name, (char *) FARPKL (&old->h_name),
				  HOSTENT_STRLEN_LIMIT - 1);
	s->h_name[HOSTENT_STRLEN_LIMIT - 1] = 0;

	s->h_aliases = HostEnt_h_aliases;
	ptr = (char **) FARPKL (&old->h_aliases);
	for (i = 0; i < (HOSTENT_ALIAS_LIMIT - 1) && FARPKL (ptr); i++, ptr++) {
		s->h_aliases[i] = HostEnt_names[i];
		// fstrncpyfrom(s->h_aliases[i], (void *) FARPKL(ptr),
		// HOSTENT_STRLEN_LIMIT-1);
		s->h_aliases[i][HOSTENT_STRLEN_LIMIT - 1] = 0;
	}
	s->h_aliases[i] = 0;

	s->h_addrtype = FARPKS (&old->h_addrtype);
	s->h_length = FARPKS (&old->h_length);

	if (FARPKS (&old->h_length) != sizeof (struct in_addr)) {
		printf ("Error!\n");
		exit (0);
	}

	s->h_addr_list = (char **) HostEnt_addr_list;
	ptr = (char **) FARPKL (&old->h_addr_list);
	for (i = 0; i < (HOSTENT_ADDR_LIST_LIMIT - 1) && FARPKL (ptr); i++, ptr++) {
		s->h_addr_list[i] = (char *) &(HostEnt_addrs[i]);
		fmemcpyfrom (s->h_addr_list[i], (void *) FARPKL (ptr), s->h_length);
	}
	s->h_addr_list[i] = 0;
}


int
getsockname (SOCKET s, struct sockaddr *name, int *namelen)
{
	RTQ_NODE   *n = MGenGetNode (IDLE_QUEUE);
	LPCData    *p;
	LPCReturn  *r;
	GetSockNameRet *ret;
	int         retVal;

	SocketError = 0;
	_farsetsel (flat_selector);
	p = (LPCData *) FARPKL (&n->rtqDatum);
	SetLPCData (p);
	FARPOKL (&p->service, LPC_SOCKGETSOCKNAME);
	FARPOKL (p->Data, s);

	MGenMoveTo (IDLE_QUEUE, SEND_QUEUE);
	PostWindowsMessage ();

	while ((n = MGenGetNode (REC_QUEUE)) == 0)
		Yield ();


	r = (LPCReturn *) FARPKL (&n->rtqDatum);

	if (FARPKS (&r->error) != LPC_NOERROR) {
		return -1;
	}

	ret = (GetSockNameRet *) r->Data;
	retVal = FARPKL (&ret->retVal);
	fmemcpyfrom (name, ret->name, FARPKL (&ret->namelen));
	*namelen = FARPKL (&ret->namelen);

	// get ready for next call
	MGenMoveTo (REC_QUEUE, IDLE_QUEUE);

	return retVal;
}

int
gethostname (char *name, int namelen)
{
	RTQ_NODE   *n;
	LPCData    *p;
	LPCReturn  *r;
	GetHostNameRet *ret;
	int         retVal;
	char       *s;

	_farsetsel (flat_selector);
	SocketError = 0;
	n = (RTQ_NODE *) MGenGetNode (IDLE_QUEUE);
	p = (LPCData *) FARPKL (&n->rtqDatum);
	SetLPCData (p);
	FARPOKL (&p->service, LPC_SOCKGETHOSTNAME);
	MGenMoveTo (IDLE_QUEUE, SEND_QUEUE);
	PostWindowsMessage ();

	while ((n = (RTQ_NODE *) (MGenGetNode (REC_QUEUE))) == 0)
		Yield ();

	r = (LPCReturn *) FARPKL (&n->rtqDatum);

	if (FARPKS (&r->error) != LPC_NOERROR) {
		return -1;
	}

	ret = (GetHostNameRet *) r->Data;

	retVal = FARPKL (&ret->retVal);

	s = ret->name;

	fstrncpyfrom (name, s, namelen);

#if 0
	len = strlen (ret->name);

	if (len > namelen)
		memcpy (name, ret->name, ret->namelen);
	else
		strcpy (name, ret->name);
#endif

	// get ready for next call
	MGenMoveTo (REC_QUEUE, IDLE_QUEUE);

	return retVal;
}

struct hostent *
gethostbyname (const char *name)
{
	RTQ_NODE   *n = MGenGetNode (IDLE_QUEUE);
	LPCData    *p;
	LPCReturn  *r;
	struct hostent *retVal;

	_farsetsel (flat_selector);
	SocketError = 0;
	p = (LPCData *) FARPKL (&n->rtqDatum);
	SetLPCData (p);
	FARPOKL (&p->service, LPC_SOCKGETHOSTBYNAME);
	fstrcpyto (p->Data, name);

	MGenMoveTo (IDLE_QUEUE, SEND_QUEUE);
	PostWindowsMessage ();

	while ((n = MGenGetNode (REC_QUEUE)) == 0)
		Yield ();

	r = (LPCReturn *) FARPKL (&n->rtqDatum);
	retVal = (struct hostent *) r->Data;

	if (FARPKL (&retVal->h_name) == 0) {
		retVal = 0;
	} else {
		ZapHostEnt ();
		ReconstructHostEnt (&HostEnt, (void *) retVal);
		retVal = &HostEnt;
	}

	// get ready for next call
	MGenMoveTo (REC_QUEUE, IDLE_QUEUE);

	return retVal;
}

struct hostent *
gethostbyaddr (const char *addr, int len, int type)
{
	RTQ_NODE   *n = MGenGetNode (IDLE_QUEUE);
	LPCData    *p;
	LPCReturn  *r;
	GetHostByAddrArgs *args;
	struct hostent *retVal;

	SocketError = 0;
	_farsetsel (flat_selector);
	p = (LPCData *) FARPKL (&n->rtqDatum);
	SetLPCData (p);
	FARPOKL (&p->service, LPC_SOCKGETHOSTBYADDR);
	args = (GetHostByAddrArgs *) p->Data;
	FARPOKL (&args->len, len);
	FARPOKL (&args->type, type);
	fmemcpyto (args->addr, addr, len);

	MGenMoveTo (IDLE_QUEUE, SEND_QUEUE);
	PostWindowsMessage ();

	while ((n = MGenGetNode (REC_QUEUE)) == 0)
		Yield ();
	r = (LPCReturn *) FARPKL (&n->rtqDatum);
	retVal = (struct hostent *) r->Data;

	if (FARPKL (&retVal->h_name) == 0) {
		retVal = 0;
	} else {
		ZapHostEnt ();

		ReconstructHostEnt (&HostEnt, (void *) retVal);
		retVal = &HostEnt;
	}

	// get ready for next call
	MGenMoveTo (REC_QUEUE, IDLE_QUEUE);

	return retVal;
}


SOCKET socket (int af, int type, int protocol)
{
	RTQ_NODE   *n = MGenGetNode (IDLE_QUEUE);
	LPCData    *p;
	LPCReturn  *r;
	SocketArgs *args;
	int         retVal;

	_farsetsel (flat_selector);
	SocketError = 0;
	p = (LPCData *) FARPKL (&n->rtqDatum);
	SetLPCData (p);
	FARPOKL (&p->service, LPC_SOCKSOCKET);
	args = (SocketArgs *) p->Data;
	FARPOKL (&args->af, af);
	FARPOKL (&args->type, type);
	FARPOKL (&args->protocol, protocol);

	MGenMoveTo (IDLE_QUEUE, SEND_QUEUE);
	PostWindowsMessage ();

	while ((n = MGenGetNode (REC_QUEUE)) == 0)
		Yield ();

	r = (LPCReturn *) FARPKL (&n->rtqDatum);


	if (FARPKS (&r->error) != LPC_NOERROR) {
		return -1;
	}

	retVal = FARPKL (r->Data);

	// get ready for next call
	MGenMoveTo (REC_QUEUE, IDLE_QUEUE);

	return retVal;
}

void
sockets_flush (void)
{
	RTQ_NODE   *n = MGenGetNode (IDLE_QUEUE);
	LPCData    *p;

	SocketError = 0;
	p = (LPCData *) FARPKL (&n->rtqDatum);
	SetLPCData (p);
	FARPOKL (&p->service, LPC_SOCKFLUSH);

	MGenMoveTo (IDLE_QUEUE, SEND_QUEUE);
	PostWindowsMessage ();

	while ((n = MGenGetNode (REC_QUEUE)) == 0)
		Yield ();

	MGenMoveTo (REC_QUEUE, IDLE_QUEUE);
}

int
recvfrom (SOCKET s, char *buf, int len, int flags, struct sockaddr *from,
		  int *fromlen)
{
	int         i;
	RTQ_NODE   *n;
	WinSockData *data;
	int         bytesRead;

	SocketError = 0;
	_farsetsel (flat_selector);
	if (!SockMap)
		GetSocketMap ();

	for (i = 0; i < MAXSOCKETS; i++) {
		if (FARPKL (&(SockMap->sock[i])) == s)
			break;
	}

	if (i == MAXSOCKETS)
		return SOCKET_ERROR;

	// pick up node
	n = MGenGetNode (i);
	if (n == 0) {
		SocketError = WSAEWOULDBLOCK;
		return -1;
	}

	data = (WinSockData *) FARPKL (&n->rtqDatum);
	bytesRead = FARPKL (&data->len);

	if (from) {
		fmemcpyfrom (from, &data->addr, sizeof (struct sockaddr));
	}

	if (fromlen) {
		*fromlen = FARPKL (&data->addrlen);
	}

	fmemcpyfrom (buf, data->data, len > bytesRead ? bytesRead : len);

	if ((flags & MSG_PEEK) == 0) {
		FreeBufferFromQueue (i);
	}

	return bytesRead;
}

int
sendto (SOCKET s, const char *buf, int len, int flags,
		const struct sockaddr *to, int tolen)
{
	int         i;
	int         outQ;
	WinSockData *data;

	SocketError = 0;
	_farsetsel (flat_selector);
	if (!SockMap)
		GetSocketMap ();

	for (i = 0; i < MAXSOCKETS; i++) {
		if (FARPKL (&SockMap->sock[i]) == s) {
			break;
		}
	}

	if (i == MAXSOCKETS) {
		SocketError = WSAENOTSOCK;
		return SOCKET_ERROR;
	}

	outQ = i + MAXSOCKETS;

	if (MGenGetQueueCtr (outQ) >= QLIMIT) {
		SocketError = WSAEWOULDBLOCK;
		return SOCKET_ERROR;
	}

	data = GetFreeBufferToQueue (PRIVATEQ, len + sizeof (WinSockData));

	if (!data) {
		SocketError = WSAEWOULDBLOCK;
		return SOCKET_ERROR;
	}

	FARPOKL (&data->s, s);
	FARPOKL (&data->len, len);
	if (to) {
		fmemcpyto (&data->addr, to, tolen);
		FARPOKL (&data->addrlen, tolen);
	} else {
		FARPOKL (&data->addrlen, 0);
	}

	FARPOKL (&data->flags, flags);

	fmemcpyto (data->data, buf, len);

	MGenMoveTo (PRIVATEQ, outQ);

	return len;
}

int
ioctlsocket (SOCKET s, long cmd, unsigned long *argp)
{
	RTQ_NODE   *n = MGenGetNode (IDLE_QUEUE);
	LPCData    *p;
	LPCReturn  *r;
	IoctlArgs  *args;
	int         retVal;

	SocketError = 0;
	_farsetsel (flat_selector);
	p = (LPCData *) FARPKL (&n->rtqDatum);
	SetLPCData (p);
	FARPOKL (&p->service, LPC_SOCKIOCTL);
	args = (IoctlArgs *) p->Data;
	FARPOKL (&args->s, s);
	FARPOKL (&args->cmd, cmd);

	switch (cmd) {
		case FIONBIO:
		FARPOKL (args->data, *argp);
		break;
		default:
		return SOCKET_ERROR;
	}

	MGenMoveTo (IDLE_QUEUE, SEND_QUEUE);
	PostWindowsMessage ();

	while ((n = MGenGetNode (REC_QUEUE)) == 0)
		Yield ();

	r = (LPCReturn *) FARPKL (&n->rtqDatum);


	retVal = FARPKL (r->Data);

	// get ready for next call
	MGenMoveTo (REC_QUEUE, IDLE_QUEUE);

	return retVal;
}

int
setsockopt (SOCKET s, int level, int optname, const char *optval, int optlen)
{
	RTQ_NODE   *n = MGenGetNode (IDLE_QUEUE);
	LPCData    *p;
	LPCReturn  *r;
	SetSockOptArgs *args;
	int         retVal;

	SocketError = 0;
	_farsetsel (flat_selector);
	p = (LPCData *) FARPKL (&n->rtqDatum);
	SetLPCData (p);
	FARPOKL (&p->service, LPC_SOCKSETOPT);
	args = (SetSockOptArgs *) p->Data;
	FARPOKL (&args->s, s);
	FARPOKL (&args->level, level);
	FARPOKL (&args->optname, optname);
	FARPOKL (&args->optlen, optlen);
	fmemcpyto (args->optval, optval, optlen);

	MGenMoveTo (IDLE_QUEUE, SEND_QUEUE);
	PostWindowsMessage ();

	while ((n = MGenGetNode (REC_QUEUE)) == 0)
		Yield ();

	r = (LPCReturn *) FARPKL (&n->rtqDatum);

	retVal = FARPKL (r->Data);

	// get ready for next call
	MGenMoveTo (REC_QUEUE, IDLE_QUEUE);

	return retVal;
}

int
WSAGetLastError (void)
{
	RTQ_NODE   *n = MGenGetNode (IDLE_QUEUE);
	LPCData    *p;
	LPCReturn  *r;
	int         retVal;


	_farsetsel (flat_selector);
	if (SocketError) {
		int         err = SocketError;

		SocketError = 0;
		return err;
	}

	p = (LPCData *) FARPKL (&n->rtqDatum);
	SetLPCData (p);
	FARPOKL (&p->service, LPC_SOCKGETLASTERROR);

	MGenMoveTo (IDLE_QUEUE, SEND_QUEUE);
	PostWindowsMessage ();

	while ((n = MGenGetNode (REC_QUEUE)) == 0)
		Yield ();

	r = (LPCReturn *) FARPKL (&n->rtqDatum);


	retVal = FARPKL (r->Data);

	// get ready for next call
	MGenMoveTo (REC_QUEUE, IDLE_QUEUE);

	return retVal;
}

unsigned long
inet_addr (const char *cp)
{
	int         ret;
	unsigned int ha1, ha2, ha3, ha4;
	unsigned long ipaddr;

	ret = sscanf (cp, "%d.%d.%d.%d", &ha1, &ha2, &ha3, &ha4);
	if (ret != 4)
		return -1;
	ipaddr = (ha1 << 24) | (ha2 << 16) | (ha3 << 8) | ha4;
	return ipaddr;
#if 0
	RTQ_NODE   *n = MGenGetNode (IDLE_QUEUE);
	LPCData    *p;
	LPCReturn  *r;
	int         retVal;

	SocketError = 0;
	_farsetsel (flat_selector);
	p = (LPCData *) FARPKL (&n->rtqDatum);
	SetLPCData (p);
	FARPOKL (&p->service, LPC_SOCKINETADDR);

	fstrcpyto (p->Data, cp);

	MGenMoveTo (IDLE_QUEUE, SEND_QUEUE);
	PostWindowsMessage ();

	while ((n = MGenGetNode (REC_QUEUE)) == 0)
		Yield ();

	r = (LPCReturn *) FARPKL (&n->rtqDatum);

	if (FARPKS (&r->error) != LPC_NOERROR) {
		return -1;
	}

	retVal = FARPKL (r->Data);

	// get ready for next call
	MGenMoveTo (REC_QUEUE, IDLE_QUEUE);

	return retVal;
#endif
}

char       *
inet_ntoa (struct in_addr in)
{
	static char buf[32];

	snprintf (buf, sizeof (buf), "%u.%u.%u.%u", in.S_un.S_un_b.s_b1,
			  in.S_un.S_un_b.s_b2, in.S_un.S_un_b.s_b3, in.S_un.S_un_b.s_b4);
	return buf;
}