[thirdparty/dhcp.git] / omapip / errwarn.c

/* errwarn.c

   Errors and warnings... */

/*
 * Copyright (c) 1995 RadioMail Corporation.
 * Copyright (c) 2009,2014 by Internet Systems Consortium, Inc. ("ISC")
 * Copyright (c) 2004,2007 by Internet Systems Consortium, Inc. ("ISC")
 * Copyright (c) 1996-2003 by Internet Software Consortium
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 *   Internet Systems Consortium, Inc.
 *   950 Charter Street
 *   Redwood City, CA 94063
 *   <info@isc.org>
 *   https://www.isc.org/
 *
 * This software was written for RadioMail Corporation by Ted Lemon
 * under a contract with Vixie Enterprises.   Further modifications have
 * been made for Internet Systems Consortium under a contract
 * with Vixie Laboratories.
 */

#include "dhcpd.h"

#include <omapip/omapip_p.h>
#include <errno.h>
#include <syslog.h>

#ifdef DEBUG
int log_perror = -1;
#else
int log_perror = 1;
#endif
void (*log_cleanup) (void);

#define CVT_BUF_MAX 1023
static char mbuf [CVT_BUF_MAX + 1];
static char fbuf [CVT_BUF_MAX + 1];

/* Log an error message, then exit... */

void log_fatal (const char * fmt, ... )
{
  va_list list;

  do_percentm (fbuf, fmt);

  /* %Audit% This is log output. %2004.06.17,Safe%
   * If we truncate we hope the user can get a hint from the log.
   */
  va_start (list, fmt);
  vsnprintf (mbuf, sizeof mbuf, fbuf, list);
  va_end (list);

#ifndef DEBUG
  syslog (LOG_ERR, "%s", mbuf);
#endif

  /* Also log it to stderr? */
  if (log_perror) {
	  IGNORE_RET (write (STDERR_FILENO, mbuf, strlen (mbuf)));
	  IGNORE_RET (write (STDERR_FILENO, "\n", 1));
  }

  log_error ("%s", "");
  log_error ("If you think you have received this message due to a bug rather");
  log_error ("than a configuration issue please read the section on submitting");
  log_error ("bugs on either our web page at www.isc.org or in the README file");
  log_error ("before submitting a bug.  These pages explain the proper");
  log_error ("process and the information we find helpful for debugging..");
  log_error ("%s", "");
  log_error ("exiting.");

  if (log_cleanup)
	  (*log_cleanup) ();
  exit (1);
}

/* Log an error message... */

int log_error (const char * fmt, ...)
{
  va_list list;

  do_percentm (fbuf, fmt);

  /* %Audit% This is log output. %2004.06.17,Safe%
   * If we truncate we hope the user can get a hint from the log.
   */
  va_start (list, fmt);
  vsnprintf (mbuf, sizeof mbuf, fbuf, list);
  va_end (list);

#ifndef DEBUG
  syslog (LOG_ERR, "%s", mbuf);
#endif

  if (log_perror) {
	  IGNORE_RET (write (STDERR_FILENO, mbuf, strlen (mbuf)));
	  IGNORE_RET (write (STDERR_FILENO, "\n", 1));
  }

  return 0;
}

/* Log a note... */

int log_info (const char *fmt, ...)
{
  va_list list;

  do_percentm (fbuf, fmt);

  /* %Audit% This is log output. %2004.06.17,Safe%
   * If we truncate we hope the user can get a hint from the log.
   */
  va_start (list, fmt);
  vsnprintf (mbuf, sizeof mbuf, fbuf, list);
  va_end (list);

#ifndef DEBUG
  syslog (LOG_INFO, "%s", mbuf);
#endif

  if (log_perror) {
	  IGNORE_RET (write (STDERR_FILENO, mbuf, strlen (mbuf)));
	  IGNORE_RET (write (STDERR_FILENO, "\n", 1));
  }

  return 0;
}

/* Log a debug message... */

int log_debug (const char *fmt, ...)
{
  va_list list;

  do_percentm (fbuf, fmt);

  /* %Audit% This is log output. %2004.06.17,Safe%
   * If we truncate we hope the user can get a hint from the log.
   */
  va_start (list, fmt);
  vsnprintf (mbuf, sizeof mbuf, fbuf, list);
  va_end (list);

#ifndef DEBUG
  syslog (LOG_DEBUG, "%s", mbuf);
#endif

  if (log_perror) {
	  IGNORE_RET (write (STDERR_FILENO, mbuf, strlen (mbuf)));
	  IGNORE_RET (write (STDERR_FILENO, "\n", 1));
  }

  return 0;
}

/* Find %m in the input string and substitute an error message string. */

void do_percentm (obuf, ibuf)
     char *obuf;
     const char *ibuf;
{
	const char *s = ibuf;
	char *p = obuf;
	int infmt = 0;
	const char *m;
	int len = 0;

	while (*s) {
		if (infmt) {
			if (*s == 'm') {
#ifndef __CYGWIN32__
				m = strerror (errno);
#else
				m = pWSAError ();
#endif
				if (!m)
					m = "<unknown error>";
				len += strlen (m);
				if (len > CVT_BUF_MAX)
					goto out;
				strcpy (p - 1, m);
				p += strlen (p);
				++s;
			} else {
				if (++len > CVT_BUF_MAX)
					goto out;
				*p++ = *s++;
			}
			infmt = 0;
		} else {
			if (*s == '%')
				infmt = 1;
			if (++len > CVT_BUF_MAX)
				goto out;
			*p++ = *s++;
		}
	}
      out:
	*p = 0;
}

#ifdef NO_STRERROR
char *strerror (err)
	int err;
{
	extern char *sys_errlist [];
	extern int sys_nerr;
	static char errbuf [128];

	if (err < 0 || err >= sys_nerr) {
		sprintf (errbuf, "Error %d", err);
		return errbuf;
	}
	return sys_errlist [err];
}
#endif /* NO_STRERROR */

#ifdef _WIN32
char *pWSAError ()
{
  int err = WSAGetLastError ();

  switch (err)
    {
    case WSAEACCES:
      return "Permission denied";
    case WSAEADDRINUSE:
      return "Address already in use";
    case WSAEADDRNOTAVAIL:
      return "Cannot assign requested address";
    case WSAEAFNOSUPPORT:
      return "Address family not supported by protocol family";
    case WSAEALREADY:
      return "Operation already in progress";
    case WSAECONNABORTED:
      return "Software caused connection abort";
    case WSAECONNREFUSED:
      return "Connection refused";
    case WSAECONNRESET:
      return "Connection reset by peer";
    case WSAEDESTADDRREQ:
      return "Destination address required";
    case WSAEFAULT:
      return "Bad address";
    case WSAEHOSTDOWN:
      return "Host is down";
    case WSAEHOSTUNREACH:
      return "No route to host";
    case WSAEINPROGRESS:
      return "Operation now in progress";
    case WSAEINTR:
      return "Interrupted function call";
    case WSAEINVAL:
      return "Invalid argument";
    case WSAEISCONN:
      return "Socket is already connected";
    case WSAEMFILE:
      return "Too many open files";
    case WSAEMSGSIZE:
      return "Message too long";
    case WSAENETDOWN:
      return "Network is down";
    case WSAENETRESET:
      return "Network dropped connection on reset";
    case WSAENETUNREACH:
      return "Network is unreachable";
    case WSAENOBUFS:
      return "No buffer space available";
    case WSAENOPROTOOPT:
      return "Bad protocol option";
    case WSAENOTCONN:
      return "Socket is not connected";
    case WSAENOTSOCK:
      return "Socket operation on non-socket";
    case WSAEOPNOTSUPP:
      return "Operation not supported";
    case WSAEPFNOSUPPORT:
      return "Protocol family not supported";
    case WSAEPROCLIM:
      return "Too many processes";
    case WSAEPROTONOSUPPORT:
      return "Protocol not supported";
    case WSAEPROTOTYPE:
      return "Protocol wrong type for socket";
    case WSAESHUTDOWN:
      return "Cannot send after socket shutdown";
    case WSAESOCKTNOSUPPORT:
      return "Socket type not supported";
    case WSAETIMEDOUT:
      return "Connection timed out";
    case WSAEWOULDBLOCK:
      return "Resource temporarily unavailable";
    case WSAHOST_NOT_FOUND:
      return "Host not found";
#if 0
    case WSA_INVALID_HANDLE:
      return "Specified event object handle is invalid";
    case WSA_INVALID_PARAMETER:
      return "One or more parameters are invalid";
    case WSAINVALIDPROCTABLE:
      return "Invalid procedure table from service provider";
    case WSAINVALIDPROVIDER:
      return "Invalid service provider version number";
    case WSA_IO_PENDING:
      return "Overlapped operations will complete later";
    case WSA_IO_INCOMPLETE:
      return "Overlapped I/O event object not in signaled state";
    case WSA_NOT_ENOUGH_MEMORY:
      return "Insufficient memory available";
#endif
    case WSANOTINITIALISED:
      return "Successful WSAStartup not yet performer";
    case WSANO_DATA:
      return "Valid name, no data record of requested type";
    case WSANO_RECOVERY:
      return "This is a non-recoverable error";
#if 0
    case WSAPROVIDERFAILEDINIT:
      return "Unable to initialize a service provider";
    case WSASYSCALLFAILURE:
      return "System call failure";
#endif
    case WSASYSNOTREADY:
      return "Network subsystem is unavailable";
    case WSATRY_AGAIN:
      return "Non-authoritative host not found";
    case WSAVERNOTSUPPORTED:
      return "WINSOCK.DLL version out of range";
    case WSAEDISCON:
      return "Graceful shutdown in progress";
#if 0
    case WSA_OPERATION_ABORTED:
      return "Overlapped operation aborted";
#endif
    }
  return "Unknown WinSock error";
}
#endif /* _WIN32 */
Commit	Line	Data
d7837182 TL	1	/* errwarn.c
	2
	3	Errors and warnings... */
	4
	5	/*
f39b6e00	6	* Copyright (c) 1995 RadioMail Corporation.
4889a646 SR	7	* Copyright (c) 2009,2014 by Internet Systems Consortium, Inc. ("ISC")
4889a646 SR	8	* Copyright (c) 2004,2007 by Internet Systems Consortium, Inc. ("ISC")
98311e4b	9	* Copyright (c) 1996-2003 by Internet Software Consortium
d7837182	10	*
98311e4b DH	11	* Permission to use, copy, modify, and distribute this software for any
	12	* purpose with or without fee is hereby granted, provided that the above
	13	* copyright notice and this permission notice appear in all copies.
d7837182	14	*
98311e4b DH	15	* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
	16	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	17	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
	18	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	19	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	20	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
	21	* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
d7837182	22	*
98311e4b DH	23	* Internet Systems Consortium, Inc.
	24	* 950 Charter Street
	25	* Redwood City, CA 94063
	26	* <info@isc.org>
2c85ac9b	27	* https://www.isc.org/
d7837182 TL	28	*
d7837182 TL	29	* This software was written for RadioMail Corporation by Ted Lemon
a2f303cd	30	* under a contract with Vixie Enterprises. Further modifications have
98311e4b	31	* been made for Internet Systems Consortium under a contract
a2f303cd	32	* with Vixie Laboratories.
d7837182 TL	33	*/
d7837182 TL	34
fe5b0fdd DH	35	#include "dhcpd.h"
fe5b0fdd DH	36
4bd8800e	37	#include <omapip/omapip_p.h>
d7837182	38	#include <errno.h>
fe5b0fdd	39	#include <syslog.h>
d7837182	40
4bd8800e TL	41	#ifdef DEBUG
	42	int log_perror = -1;
	43	#else
	44	int log_perror = 1;
	45	#endif
4bd8800e	46	void (*log_cleanup) (void);
d7837182	47
0a10a8df TL	48	#define CVT_BUF_MAX 1023
	49	static char mbuf [CVT_BUF_MAX + 1];
	50	static char fbuf [CVT_BUF_MAX + 1];
d7837182 TL	51
	52	/* Log an error message, then exit... */
	53
cfdfb9f1	54	void log_fatal (const char * fmt, ... )
d7837182 TL	55	{
d7837182 TL	56	va_list list;
d7837182 TL	57
	58	do_percentm (fbuf, fmt);
	59
98311e4b DH	60	/* %Audit% This is log output. %2004.06.17,Safe%
	61	* If we truncate we hope the user can get a hint from the log.
	62	*/
cfdfb9f1	63	va_start (list, fmt);
d7837182 TL	64	vsnprintf (mbuf, sizeof mbuf, fbuf, list);
d7837182 TL	65	va_end (list);
55526112	66
eb5cc81e	67	#ifndef DEBUG
38c4774a	68	syslog (LOG_ERR, "%s", mbuf);
eb5cc81e	69	#endif
55526112 TL	70
	71	/* Also log it to stderr? */
	72	if (log_perror) {
ae566556 SR	73	IGNORE_RET (write (STDERR_FILENO, mbuf, strlen (mbuf)));
ae566556 SR	74	IGNORE_RET (write (STDERR_FILENO, "\n", 1));
55526112	75	}
d7837182	76
5d62f969	77	log_error ("%s", "");
4889a646 SR	78	log_error ("If you think you have received this message due to a bug rather");
	79	log_error ("than a configuration issue please read the section on submitting");
	80	log_error ("bugs on either our web page at www.isc.org or in the README file");
	81	log_error ("before submitting a bug. These pages explain the proper");
	82	log_error ("process and the information we find helpful for debugging..");
5d62f969	83	log_error ("%s", "");
f1b8950a	84	log_error ("exiting.");
4889a646	85
4bd8800e TL	86	if (log_cleanup)
4bd8800e TL	87	(*log_cleanup) ();
d7837182 TL	88	exit (1);
	89	}
	90
8ae2d595	91	/* Log an error message... */
d7837182	92
cfdfb9f1	93	int log_error (const char * fmt, ...)
d7837182 TL	94	{
	95	va_list list;
	96
	97	do_percentm (fbuf, fmt);
	98
98311e4b DH	99	/* %Audit% This is log output. %2004.06.17,Safe%
	100	* If we truncate we hope the user can get a hint from the log.
	101	*/
cfdfb9f1	102	va_start (list, fmt);
d7837182 TL	103	vsnprintf (mbuf, sizeof mbuf, fbuf, list);
d7837182 TL	104	va_end (list);
55526112	105
eb5cc81e	106	#ifndef DEBUG
38c4774a	107	syslog (LOG_ERR, "%s", mbuf);
eb5cc81e	108	#endif
55526112 TL	109
55526112 TL	110	if (log_perror) {
ae566556 SR	111	IGNORE_RET (write (STDERR_FILENO, mbuf, strlen (mbuf)));
ae566556 SR	112	IGNORE_RET (write (STDERR_FILENO, "\n", 1));
55526112 TL	113	}
55526112 TL	114
d7837182 TL	115	return 0;
	116	}
	117
	118	/* Log a note... */
	119
cfdfb9f1	120	int log_info (const char *fmt, ...)
d7837182 TL	121	{
	122	va_list list;
	123
	124	do_percentm (fbuf, fmt);
	125
98311e4b DH	126	/* %Audit% This is log output. %2004.06.17,Safe%
	127	* If we truncate we hope the user can get a hint from the log.
	128	*/
cfdfb9f1	129	va_start (list, fmt);
d7837182 TL	130	vsnprintf (mbuf, sizeof mbuf, fbuf, list);
d7837182 TL	131	va_end (list);
55526112	132
eb5cc81e	133	#ifndef DEBUG
38c4774a	134	syslog (LOG_INFO, "%s", mbuf);
eb5cc81e	135	#endif
55526112 TL	136
55526112 TL	137	if (log_perror) {
ae566556 SR	138	IGNORE_RET (write (STDERR_FILENO, mbuf, strlen (mbuf)));
ae566556 SR	139	IGNORE_RET (write (STDERR_FILENO, "\n", 1));
55526112 TL	140	}
55526112 TL	141
d7837182 TL	142	return 0;
	143	}
	144
	145	/* Log a debug message... */
	146
cfdfb9f1	147	int log_debug (const char *fmt, ...)
d7837182 TL	148	{
	149	va_list list;
	150
	151	do_percentm (fbuf, fmt);
	152
98311e4b DH	153	/* %Audit% This is log output. %2004.06.17,Safe%
	154	* If we truncate we hope the user can get a hint from the log.
	155	*/
cfdfb9f1	156	va_start (list, fmt);
d7837182 TL	157	vsnprintf (mbuf, sizeof mbuf, fbuf, list);
d7837182 TL	158	va_end (list);
55526112	159
eb5cc81e	160	#ifndef DEBUG
38c4774a	161	syslog (LOG_DEBUG, "%s", mbuf);
eb5cc81e	162	#endif
55526112 TL	163
55526112 TL	164	if (log_perror) {
ae566556 SR	165	IGNORE_RET (write (STDERR_FILENO, mbuf, strlen (mbuf)));
ae566556 SR	166	IGNORE_RET (write (STDERR_FILENO, "\n", 1));
55526112 TL	167	}
55526112 TL	168
d7837182 TL	169	return 0;
	170	}
	171
	172	/* Find %m in the input string and substitute an error message string. */
	173
4bd8800e	174	void do_percentm (obuf, ibuf)
d7837182	175	char *obuf;
b1b7b521	176	const char *ibuf;
d7837182	177	{
b1b7b521	178	const char *s = ibuf;
7c695fad TL	179	char *p = obuf;
7c695fad TL	180	int infmt = 0;
b1b7b521	181	const char *m;
0a10a8df	182	int len = 0;
d7837182	183
0a10a8df TL	184	while (*s) {
	185	if (infmt) {
	186	if (*s == 'm') {
7c695fad TL	187	#ifndef __CYGWIN32__
	188	m = strerror (errno);
	189	#else
	190	m = pWSAError ();
	191	#endif
	192	if (!m)
	193	m = "<unknown error>";
0a10a8df TL	194	len += strlen (m);
	195	if (len > CVT_BUF_MAX)
	196	goto out;
7c695fad TL	197	strcpy (p - 1, m);
	198	p += strlen (p);
	199	++s;
0a10a8df TL	200	} else {
	201	if (++len > CVT_BUF_MAX)
	202	goto out;
7c695fad	203	p++ = s++;
0a10a8df	204	}
7c695fad	205	infmt = 0;
0a10a8df	206	} else {
7c695fad TL	207	if (*s == '%')
7c695fad TL	208	infmt = 1;
0a10a8df TL	209	if (++len > CVT_BUF_MAX)
0a10a8df TL	210	goto out;
7c695fad TL	211	p++ = s++;
7c695fad TL	212	}
d7837182	213	}
0a10a8df	214	out:
7c695fad	215	*p = 0;
d7837182 TL	216	}
d7837182 TL	217
cd05ee6b TL	218	#ifdef NO_STRERROR
	219	char *strerror (err)
	220	int err;
	221	{
	222	extern char *sys_errlist [];
	223	extern int sys_nerr;
	224	static char errbuf [128];
	225
	226	if (err < 0 \|\| err >= sys_nerr) {
	227	sprintf (errbuf, "Error %d", err);
	228	return errbuf;
	229	}
	230	return sys_errlist [err];
	231	}
	232	#endif /* NO_STRERROR */
7c695fad TL	233
	234	#ifdef _WIN32
	235	char *pWSAError ()
	236	{
	237	int err = WSAGetLastError ();
	238
	239	switch (err)
	240	{
	241	case WSAEACCES:
	242	return "Permission denied";
	243	case WSAEADDRINUSE:
	244	return "Address already in use";
	245	case WSAEADDRNOTAVAIL:
	246	return "Cannot assign requested address";
	247	case WSAEAFNOSUPPORT:
	248	return "Address family not supported by protocol family";
	249	case WSAEALREADY:
	250	return "Operation already in progress";
	251	case WSAECONNABORTED:
	252	return "Software caused connection abort";
	253	case WSAECONNREFUSED:
	254	return "Connection refused";
	255	case WSAECONNRESET:
	256	return "Connection reset by peer";
	257	case WSAEDESTADDRREQ:
	258	return "Destination address required";
	259	case WSAEFAULT:
	260	return "Bad address";
	261	case WSAEHOSTDOWN:
	262	return "Host is down";
	263	case WSAEHOSTUNREACH:
	264	return "No route to host";
	265	case WSAEINPROGRESS:
	266	return "Operation now in progress";
	267	case WSAEINTR:
	268	return "Interrupted function call";
	269	case WSAEINVAL:
	270	return "Invalid argument";
	271	case WSAEISCONN:
	272	return "Socket is already connected";
	273	case WSAEMFILE:
	274	return "Too many open files";
	275	case WSAEMSGSIZE:
	276	return "Message too long";
	277	case WSAENETDOWN:
	278	return "Network is down";
	279	case WSAENETRESET:
	280	return "Network dropped connection on reset";
	281	case WSAENETUNREACH:
	282	return "Network is unreachable";
	283	case WSAENOBUFS:
	284	return "No buffer space available";
	285	case WSAENOPROTOOPT:
	286	return "Bad protocol option";
	287	case WSAENOTCONN:
	288	return "Socket is not connected";
	289	case WSAENOTSOCK:
	290	return "Socket operation on non-socket";
	291	case WSAEOPNOTSUPP:
	292	return "Operation not supported";
	293	case WSAEPFNOSUPPORT:
	294	return "Protocol family not supported";
	295	case WSAEPROCLIM:
	296	return "Too many processes";
297	case WSAEPROTONOSUPPORT:
298	return "Protocol not supported";
299	case WSAEPROTOTYPE:
300	return "Protocol wrong type for socket";
301	case WSAESHUTDOWN:
302	return "Cannot send after socket shutdown";
303	case WSAESOCKTNOSUPPORT:
304	return "Socket type not supported";
305	case WSAETIMEDOUT:
306	return "Connection timed out";
307	case WSAEWOULDBLOCK:
308	return "Resource temporarily unavailable";
309	case WSAHOST_NOT_FOUND:
310	return "Host not found";
311	#if 0
312	case WSA_INVALID_HANDLE:
313	return "Specified event object handle is invalid";
314	case WSA_INVALID_PARAMETER:
315	return "One or more parameters are invalid";
316	case WSAINVALIDPROCTABLE:
317	return "Invalid procedure table from service provider";
318	case WSAINVALIDPROVIDER:
319	return "Invalid service provider version number";
320	case WSA_IO_PENDING:
321	return "Overlapped operations will complete later";
322	case WSA_IO_INCOMPLETE:
323	return "Overlapped I/O event object not in signaled state";
324	case WSA_NOT_ENOUGH_MEMORY:
325	return "Insufficient memory available";
326	#endif
327	case WSANOTINITIALISED:
328	return "Successful WSAStartup not yet performer";
329	case WSANO_DATA:
330	return "Valid name, no data record of requested type";
331	case WSANO_RECOVERY:
332	return "This is a non-recoverable error";
333	#if 0
334	case WSAPROVIDERFAILEDINIT:
335	return "Unable to initialize a service provider";
336	case WSASYSCALLFAILURE:
337	return "System call failure";
338	#endif
339	case WSASYSNOTREADY:
340	return "Network subsystem is unavailable";
341	case WSATRY_AGAIN:
342	return "Non-authoritative host not found";
343	case WSAVERNOTSUPPORTED:
344	return "WINSOCK.DLL version out of range";
345	case WSAEDISCON:
346	return "Graceful shutdown in progress";
347	#if 0
348	case WSA_OPERATION_ABORTED:
349	return "Overlapped operation aborted";
350	#endif
351	}
352	return "Unknown WinSock error";
353	}
354	#endif /* _WIN32 */