smb printing; from Andrew Tridgell; via tcpdump.org

1 files changed, 759 insertions, 0 deletions

diff --git a/usr.sbin/tcpdump/smbutil.c b/usr.sbin/tcpdump/smbutil.c
new file mode 100644
index 00000000000..725ac6982a0
--- /dev/null
+++ b/usr.sbin/tcpdump/smbutil.c
@@ -0,0 +1,759 @@
+/*	$OpenBSD: smbutil.c,v 1.1 2000/12/07 22:36:46 mickey Exp $	*/
+
+/*
+   Copyright (C) Andrew Tridgell 1995-1999
+
+   This software may be distributed either under the terms of the
+   BSD-style license that accompanies tcpdump or the GNU GPL version 2
+   or later */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifndef lint
+static const char rcsid[] =
+     "@(#) $Header: /cvs/OpenBSD/src/usr.sbin/tcpdump/smbutil.c,v 1.1 2000/12/07 22:36:46 mickey Exp $";
+#endif
+
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+
+
+#include <netinet/in.h>
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include "interface.h"
+#include "smb.h"
+
+extern const uchar *startbuf;
+
+/*******************************************************************
+  interpret a 32 bit dos packed date/time to some parameters
+********************************************************************/
+static void interpret_dos_date(uint32 date,int *year,int *month,int *day,int *hour,int *minute,int *second)
+{
+  uint32 p0,p1,p2,p3;
+
+  p0=date&0xFF; p1=((date&0xFF00)>>8)&0xFF;
+  p2=((date&0xFF0000)>>16)&0xFF; p3=((date&0xFF000000)>>24)&0xFF;
+
+  *second = 2*(p0 & 0x1F);
+  *minute = ((p0>>5)&0xFF) + ((p1&0x7)<<3);
+  *hour = (p1>>3)&0xFF;
+  *day = (p2&0x1F);
+  *month = ((p2>>5)&0xFF) + ((p3&0x1)<<3) - 1;
+  *year = ((p3>>1)&0xFF) + 80;
+}
+
+/*******************************************************************
+  create a unix date from a dos date
+********************************************************************/
+static time_t make_unix_date(const void *date_ptr)
+{
+  uint32 dos_date=0;
+  struct tm t;
+
+  dos_date = IVAL(date_ptr,0);
+
+  if (dos_date == 0) return(0);
+
+  interpret_dos_date(dos_date,&t.tm_year,&t.tm_mon,
+		     &t.tm_mday,&t.tm_hour,&t.tm_min,&t.tm_sec);
+  t.tm_wday = 1;
+  t.tm_yday = 1;
+  t.tm_isdst = 0;
+
+  return (mktime(&t));
+}
+
+/*******************************************************************
+  create a unix date from a dos date
+********************************************************************/
+static time_t make_unix_date2(const void *date_ptr)
+{
+  uint32 x,x2;
+
+  x = IVAL(date_ptr,0);
+  x2 = ((x&0xFFFF)<<16) | ((x&0xFFFF0000)>>16);
+  SIVAL(&x,0,x2);
+
+  return(make_unix_date((void *)&x));
+}
+
+/****************************************************************************
+interpret an 8 byte "filetime" structure to a time_t
+It's originally in "100ns units since jan 1st 1601"
+****************************************************************************/
+static time_t interpret_long_date(const char *p)
+{
+  double d;
+  time_t ret;
+
+  /* this gives us seconds since jan 1st 1601 (approx) */
+  d = (IVAL(p,4)*256.0 + CVAL(p,3)) * (1.0e-7 * (1<<24));
+
+  /* now adjust by 369 years to make the secs since 1970 */
+  d -= 369.0*365.25*24*60*60;
+
+  /* and a fudge factor as we got it wrong by a few days */
+  d += (3*24*60*60 + 6*60*60 + 2);
+
+  if (d<0)
+    return(0);
+
+  ret = (time_t)d;
+
+  return(ret);
+}
+
+
+/****************************************************************************
+interpret the weird netbios "name". Return the name type, or -1 if
+we run past the end of the buffer
+****************************************************************************/
+static int name_interpret(const uchar *in,const uchar *maxbuf,char *out)
+{
+  int ret;
+  int len;
+
+  if (in >= maxbuf)
+    return(-1);	/* name goes past the end of the buffer */
+  TCHECK2(*in, 1);
+  len = (*in++) / 2;
+
+  *out=0;
+
+  if (len > 30 || len<1) return(0);
+
+  while (len--)
+    {
+      if (in + 1 >= maxbuf)
+	return(-1);	/* name goes past the end of the buffer */
+      TCHECK2(*in, 2);
+      if (in[0] < 'A' || in[0] > 'P' || in[1] < 'A' || in[1] > 'P') {
+	*out = 0;
+	return(0);
+      }
+      *out = ((in[0]-'A')<<4) + (in[1]-'A');
+      in += 2;
+      out++;
+    }
+  *out = 0;
+  ret = out[-1];
+
+  return(ret);
+
+trunc:
+  return(-1);
+}
+
+/****************************************************************************
+find a pointer to a netbios name
+****************************************************************************/
+static const uchar *name_ptr(const uchar *buf,int ofs,const uchar *maxbuf)
+{
+  const uchar *p;
+  uchar c;
+
+  p = buf+ofs;
+  if (p >= maxbuf)
+    return(NULL);	/* name goes past the end of the buffer */
+  TCHECK2(*p, 1);
+
+  c = *p;
+
+  /* XXX - this should use the same code that the DNS dissector does */
+  if ((c & 0xC0) == 0xC0)
+    {
+      uint16 l = RSVAL(buf, ofs) & 0x3FFF;
+      if (l == 0)
+	{
+	  /* We have a pointer that points to itself. */
+	  return(NULL);
+	}
+      p = buf + l;
+      if (p >= maxbuf)
+	return(NULL);	/* name goes past the end of the buffer */
+      TCHECK2(*p, 1);
+      return(buf + l);
+    }
+  else
+    return(buf+ofs);
+
+trunc:
+  return(NULL);	/* name goes past the end of the buffer */
+}
+
+/****************************************************************************
+extract a netbios name from a buf
+****************************************************************************/
+static int name_extract(const uchar *buf,int ofs,const uchar *maxbuf,char *name)
+{
+  const uchar *p = name_ptr(buf,ofs,maxbuf);
+  if (p == NULL)
+    return(-1);	/* error (probably name going past end of buffer) */
+  strcpy(name,"");
+  return(name_interpret(p,maxbuf,name));
+}
+
+
+/****************************************************************************
+return the total storage length of a mangled name
+****************************************************************************/
+static int name_len(const unsigned char *s, const unsigned char *maxbuf)
+{
+  const unsigned char *s0 = s;
+  unsigned char c;
+
+  if (s >= maxbuf)
+    return(-1);	/* name goes past the end of the buffer */
+  TCHECK2(*s, 1);
+  c = *s;
+  if ((c & 0xC0) == 0xC0)
+    return(2);
+  while (*s)
+    {
+      if (s >= maxbuf)
+	return(-1);	/* name goes past the end of the buffer */
+      TCHECK2(*s, 1);
+      s += (*s)+1;
+    }
+  return(PTR_DIFF(s,s0)+1);
+
+trunc:
+  return(-1);	/* name goes past the end of the buffer */
+}
+
+static void print_asc(const unsigned char *buf,int len)
+{
+  int i;
+  for (i=0;i<len;i++)
+    printf("%c",isprint(buf[i])?buf[i]:'.');
+}
+
+static char *name_type_str(int name_type)
+{
+  static char *f = NULL;
+  switch (name_type) {
+  case 0:    f = "Workstation"; break;
+  case 0x03: f = "Client?"; break;
+  case 0x20: f = "Server"; break;
+  case 0x1d: f = "Master Browser"; break;
+  case 0x1b: f = "Domain Controller"; break;
+  case 0x1e: f = "Browser Server"; break;
+  default:   f = "Unknown"; break;
+  }
+  return(f);
+}
+
+void print_data(const unsigned char *buf, int len)
+{
+  int i=0;
+  if (len<=0) return;
+  printf("[%03X] ",i);
+  for (i=0;i<len;) {
+    printf("%02X ",(int)buf[i]);
+    i++;
+    if (i%8 == 0) printf(" ");
+    if (i%16 == 0) {
+      print_asc(&buf[i-16],8); printf(" ");
+      print_asc(&buf[i-8],8); printf("\n");
+      if (i<len) printf("[%03X] ",i);
+    }
+  }
+  if (i%16) {
+    int n;
+
+    n = 16 - (i%16);
+    printf(" ");
+    if (n>8) printf(" ");
+    while (n--) printf("   ");
+
+    n = MIN(8,i%16);
+    print_asc(&buf[i-(i%16)],n); printf(" ");
+    n = (i%16) - n;
+    if (n>0) print_asc(&buf[i-n],n);
+    printf("\n");
+  }
+}
+
+
+static void write_bits(unsigned int val,char *fmt)
+{
+  char *p = fmt;
+  int i=0;
+
+  while ((p=strchr(fmt,'|'))) {
+    int l = PTR_DIFF(p,fmt);
+    if (l && (val & (1<<i)))
+      printf("%.*s ",l,fmt);
+    fmt = p+1;
+    i++;
+  }
+}
+
+/* convert a unicode string */
+static const char *unistr(const char *s, int *len)
+{
+	static char buf[1000];
+	int l=0;
+	static int use_unicode = -1;
+
+	if (use_unicode == -1) {
+		char *p = getenv("USE_UNICODE");
+		if (p && (atoi(p) == 1))
+			use_unicode = 1;
+		else
+			use_unicode = 0;
+	}
+
+	/* maybe it isn't unicode - a cheap trick */
+	if (!use_unicode || (s[0] && s[1])) {
+		*len = strlen(s)+1;
+		return s;
+	}
+
+	*len = 0;
+
+	if (s[0] == 0 && s[1] != 0) {
+		s++;
+		*len = 1;
+	}
+
+	while (l < (sizeof(buf)-1) && s[0] && s[1] == 0) {
+		buf[l] = s[0];
+		s += 2; l++;
+		*len += 2;
+	}
+	buf[l] = 0;
+	*len += 2;
+	return buf;
+}
+
+static const uchar *fdata1(const uchar *buf, const char *fmt, const uchar *maxbuf)
+{
+  int reverse=0;
+  char *attrib_fmt = "READONLY|HIDDEN|SYSTEM|VOLUME|DIR|ARCHIVE|";
+  int len;
+
+  while (*fmt && buf<maxbuf) {
+    switch (*fmt) {
+    case 'a':
+      write_bits(CVAL(buf,0),attrib_fmt);
+      buf++; fmt++;
+      break;
+
+    case 'A':
+      write_bits(SVAL(buf,0),attrib_fmt);
+      buf+=2; fmt++;
+      break;
+
+    case '{':
+      {
+	char bitfmt[128];
+	char *p = strchr(++fmt,'}');
+	int l = PTR_DIFF(p,fmt);
+	strncpy(bitfmt,fmt,l);
+	bitfmt[l]=0;
+	fmt = p+1;
+	write_bits(CVAL(buf,0),bitfmt);
+	buf++;
+	break;
+      }
+
+    case 'P':
+      {
+	int l = atoi(fmt+1);
+	buf += l;
+	fmt++;
+	while (isdigit(*fmt)) fmt++;
+	break;
+      }
+    case 'r':
+      reverse = !reverse;
+      fmt++;
+      break;
+    case 'D':
+      {
+	unsigned int x = reverse?RIVAL(buf,0):IVAL(buf,0);
+	printf("%d (0x%x)",x, x);
+	buf += 4;
+	fmt++;
+	break;
+      }
+    case 'L':
+      {
+	unsigned int x1 = reverse?RIVAL(buf,0):IVAL(buf,0);
+	unsigned int x2 = reverse?RIVAL(buf,4):IVAL(buf,4);
+	if (x2) {
+		printf("0x%08x:%08x",x2, x1);
+	} else {
+		printf("%d (0x%08x%08x)",x1, x2, x1);
+	}
+	buf += 8;
+	fmt++;
+	break;
+      }
+    case 'd':
+      {
+	unsigned int x = reverse?RSVAL(buf,0):SVAL(buf,0);
+	printf("%d (0x%x)",x, x);
+	buf += 2;
+	fmt++;
+	break;
+      }
+    case 'W':
+      {
+	unsigned int x = reverse?RIVAL(buf,0):IVAL(buf,0);
+	printf("0x%X",x);
+	buf += 4;
+	fmt++;
+	break;
+      }
+    case 'w':
+      {
+	unsigned int x = reverse?RSVAL(buf,0):SVAL(buf,0);
+	printf("0x%X",x);
+	buf += 2;
+	fmt++;
+	break;
+      }
+    case 'B':
+      {
+	unsigned int x = CVAL(buf,0);
+	printf("0x%X",x);
+	buf += 1;
+	fmt++;
+	break;
+      }
+    case 'b':
+      {
+	unsigned int x = CVAL(buf,0);
+	printf("%d (0x%x)",x, x);
+	buf += 1;
+	fmt++;
+	break;
+      }
+    case 'S':
+      {
+	      printf("%.*s",(int)PTR_DIFF(maxbuf,buf),unistr(buf, &len));
+	      buf += len;
+	      fmt++;
+	      break;
+      }
+    case 'Z':
+      {
+	if (*buf != 4 && *buf != 2)
+	  printf("Error! ASCIIZ buffer of type %d (safety=%d)\n",
+		 *buf,(int)PTR_DIFF(maxbuf,buf));
+	printf("%.*s",(int)PTR_DIFF(maxbuf,buf+1),unistr(buf+1, &len));
+	buf += len+1;
+	fmt++;
+	break;
+      }
+    case 's':
+      {
+	int l = atoi(fmt+1);
+	printf("%-*.*s",l,l,buf);
+	buf += l;
+	fmt++; while (isdigit(*fmt)) fmt++;
+	break;
+      }
+    case 'h':
+      {
+	int l = atoi(fmt+1);
+	while (l--) printf("%02x",*buf++);
+	fmt++; while (isdigit(*fmt)) fmt++;
+	break;
+      }
+    case 'n':
+      {
+	int t = atoi(fmt+1);
+	char nbuf[255];
+	int name_type;
+	int len;
+	switch (t) {
+	case 1:
+	  name_type = name_extract(startbuf,PTR_DIFF(buf,startbuf),maxbuf,
+		nbuf);
+	  if (name_type < 0)
+	    goto trunc;
+	  len = name_len(buf,maxbuf);
+	  if (len < 0)
+	    goto trunc;
+	  buf += len;
+	  printf("%-15.15s NameType=0x%02X (%s)",
+		 nbuf,name_type,name_type_str(name_type));
+	  break;
+	case 2:
+	  name_type = buf[15];
+	  printf("%-15.15s NameType=0x%02X (%s)",
+		 buf,name_type,name_type_str(name_type));
+	  buf += 16;
+	  break;
+	}
+	fmt++; while (isdigit(*fmt)) fmt++;
+	break;
+      }
+    case 'T':
+      {
+	time_t t;
+	int x = IVAL(buf,0);
+	switch (atoi(fmt+1)) {
+	case 1:
+	  if (x==0 || x==-1 || x==0xFFFFFFFF)
+	    t = 0;
+	  else
+	    t = make_unix_date(buf);
+	  buf+=4;
+	  break;
+	case 2:
+	  if (x==0 || x==-1 || x==0xFFFFFFFF)
+	    t = 0;
+	  else
+	    t = make_unix_date2(buf);
+	  buf+=4;
+	  break;
+	case 3:
+	  t = interpret_long_date(buf);
+	  buf+=8;
+	  break;
+	}
+	printf("%s",t?asctime(localtime(&t)):"NULL\n");
+	fmt++; while (isdigit(*fmt)) fmt++;
+	break;
+      }
+    default:
+      putchar(*fmt);
+      fmt++;
+      break;
+    }
+  }
+
+  if (buf>=maxbuf && *fmt)
+    printf("END OF BUFFER\n");
+
+  return(buf);
+
+trunc:
+  printf("\n");
+  printf("WARNING: Short packet. Try increasing the snap length\n");
+  return(NULL);
+}
+
+const uchar *fdata(const uchar *buf, const char *fmt, const uchar *maxbuf)
+{
+  static int depth=0;
+  char s[128];
+  char *p;
+
+  while (*fmt) {
+    switch (*fmt) {
+    case '*':
+      fmt++;
+      while (buf < maxbuf) {
+	const uchar *buf2;
+	depth++;
+	buf2 = fdata(buf,fmt,maxbuf);
+	depth--;
+	if (buf2 == buf) return(buf);
+	buf = buf2;
+      }
+      break;
+
+    case '|':
+      fmt++;
+      if (buf>=maxbuf) return(buf);
+      break;
+
+    case '%':
+      fmt++;
+      buf=maxbuf;
+      break;
+
+    case '#':
+      fmt++;
+      return(buf);
+      break;
+
+    case '[':
+      fmt++;
+      if (buf>=maxbuf) return(buf);
+      memset(s, 0, sizeof(s));
+      p = strchr(fmt,']');
+      strncpy(s,fmt,p-fmt);
+      fmt = p+1;
+      buf = fdata1(buf,s,maxbuf);
+      if (buf == NULL)
+	return(NULL);
+      break;
+
+    default:
+      putchar(*fmt); fmt++;
+      fflush(stdout);
+      break;
+    }
+  }
+  if (!depth && buf<maxbuf) {
+    int len = PTR_DIFF(maxbuf,buf);
+    printf("Data: (%d bytes)\n",len);
+    print_data(buf,len);
+    return(buf+len);
+  }
+  return(buf);
+}
+
+typedef struct
+{
+  char *name;
+  int code;
+  char *message;
+} err_code_struct;
+
+/* Dos Error Messages */
+static err_code_struct dos_msgs[] = {
+  {"ERRbadfunc",1,"Invalid function."},
+  {"ERRbadfile",2,"File not found."},
+  {"ERRbadpath",3,"Directory invalid."},
+  {"ERRnofids",4,"No file descriptors available"},
+  {"ERRnoaccess",5,"Access denied."},
+  {"ERRbadfid",6,"Invalid file handle."},
+  {"ERRbadmcb",7,"Memory control blocks destroyed."},
+  {"ERRnomem",8,"Insufficient server memory to perform the requested function."},
+  {"ERRbadmem",9,"Invalid memory block address."},
+  {"ERRbadenv",10,"Invalid environment."},
+  {"ERRbadformat",11,"Invalid format."},
+  {"ERRbadaccess",12,"Invalid open mode."},
+  {"ERRbaddata",13,"Invalid data."},
+  {"ERR",14,"reserved."},
+  {"ERRbaddrive",15,"Invalid drive specified."},
+  {"ERRremcd",16,"A Delete Directory request attempted  to  remove  the  server's  current directory."},
+  {"ERRdiffdevice",17,"Not same device."},
+  {"ERRnofiles",18,"A File Search command can find no more files matching the specified criteria."},
+  {"ERRbadshare",32,"The sharing mode specified for an Open conflicts with existing  FIDs  on the file."},
+  {"ERRlock",33,"A Lock request conflicted with an existing lock or specified an  invalid mode,  or an Unlock requested attempted to remove a lock held by another process."},
+  {"ERRfilexists",80,"The file named in a Create Directory, Make  New  File  or  Link  request already exists."},
+  {"ERRbadpipe",230,"Pipe invalid."},
+  {"ERRpipebusy",231,"All instances of the requested pipe are busy."},
+  {"ERRpipeclosing",232,"Pipe close in progress."},
+  {"ERRnotconnected",233,"No process on other end of pipe."},
+  {"ERRmoredata",234,"There is more data to be returned."},
+  {NULL,-1,NULL}};
+
+/* Server Error Messages */
+err_code_struct server_msgs[] = {
+  {"ERRerror",1,"Non-specific error code."},
+  {"ERRbadpw",2,"Bad password - name/password pair in a Tree Connect or Session Setup are invalid."},
+  {"ERRbadtype",3,"reserved."},
+  {"ERRaccess",4,"The requester does not have  the  necessary  access  rights  within  the specified  context for the requested function. The context is defined by the TID or the UID."},
+  {"ERRinvnid",5,"The tree ID (TID) specified in a command was invalid."},
+  {"ERRinvnetname",6,"Invalid network name in tree connect."},
+  {"ERRinvdevice",7,"Invalid device - printer request made to non-printer connection or  non-printer request made to printer connection."},
+  {"ERRqfull",49,"Print queue full (files) -- returned by open print file."},
+  {"ERRqtoobig",50,"Print queue full -- no space."},
+  {"ERRqeof",51,"EOF on print queue dump."},
+  {"ERRinvpfid",52,"Invalid print file FID."},
+  {"ERRsmbcmd",64,"The server did not recognize the command received."},
+  {"ERRsrverror",65,"The server encountered an internal error, e.g., system file unavailable."},
+  {"ERRfilespecs",67,"The file handle (FID) and pathname parameters contained an invalid  combination of values."},
+  {"ERRreserved",68,"reserved."},
+  {"ERRbadpermits",69,"The access permissions specified for a file or directory are not a valid combination.  The server cannot set the requested attribute."},
+  {"ERRreserved",70,"reserved."},
+  {"ERRsetattrmode",71,"The attribute mode in the Set File Attribute request is invalid."},
+  {"ERRpaused",81,"Server is paused."},
+  {"ERRmsgoff",82,"Not receiving messages."},
+  {"ERRnoroom",83,"No room to buffer message."},
+  {"ERRrmuns",87,"Too many remote user names."},
+  {"ERRtimeout",88,"Operation timed out."},
+  {"ERRnoresource",89,"No resources currently available for request."},
+  {"ERRtoomanyuids",90,"Too many UIDs active on this session."},
+  {"ERRbaduid",91,"The UID is not known as a valid ID on this session."},
+  {"ERRusempx",250,"Temp unable to support Raw, use MPX mode."},
+  {"ERRusestd",251,"Temp unable to support Raw, use standard read/write."},
+  {"ERRcontmpx",252,"Continue in MPX mode."},
+  {"ERRreserved",253,"reserved."},
+  {"ERRreserved",254,"reserved."},
+  {"ERRnosupport",0xFFFF,"Function not supported."},
+  {NULL,-1,NULL}};
+
+/* Hard Error Messages */
+err_code_struct hard_msgs[] = {
+  {"ERRnowrite",19,"Attempt to write on write-protected diskette."},
+  {"ERRbadunit",20,"Unknown unit."},
+  {"ERRnotready",21,"Drive not ready."},
+  {"ERRbadcmd",22,"Unknown command."},
+  {"ERRdata",23,"Data error (CRC)."},
+  {"ERRbadreq",24,"Bad request structure length."},
+  {"ERRseek",25 ,"Seek error."},
+  {"ERRbadmedia",26,"Unknown media type."},
+  {"ERRbadsector",27,"Sector not found."},
+  {"ERRnopaper",28,"Printer out of paper."},
+  {"ERRwrite",29,"Write fault."},
+  {"ERRread",30,"Read fault."},
+  {"ERRgeneral",31,"General failure."},
+  {"ERRbadshare",32,"A open conflicts with an existing open."},
+  {"ERRlock",33,"A Lock request conflicted with an existing lock or specified an invalid mode, or an Unlock requested attempted to remove a lock held by another process."},
+  {"ERRwrongdisk",34,"The wrong disk was found in a drive."},
+  {"ERRFCBUnavail",35,"No FCBs are available to process request."},
+  {"ERRsharebufexc",36,"A sharing buffer has been exceeded."},
+  {NULL,-1,NULL}};
+
+
+static struct
+{
+  int code;
+  char *class;
+  err_code_struct *err_msgs;
+} err_classes[] = {
+  {0,"SUCCESS",NULL},
+  {0x01,"ERRDOS",dos_msgs},
+  {0x02,"ERRSRV",server_msgs},
+  {0x03,"ERRHRD",hard_msgs},
+  {0x04,"ERRXOS",NULL},
+  {0xE1,"ERRRMX1",NULL},
+  {0xE2,"ERRRMX2",NULL},
+  {0xE3,"ERRRMX3",NULL},
+  {0xFF,"ERRCMD",NULL},
+  {-1,NULL,NULL}};
+
+
+/****************************************************************************
+return a SMB error string from a SMB buffer
+****************************************************************************/
+char *smb_errstr(int class,int num)
+{
+  static char ret[128];
+  int i,j;
+
+  ret[0]=0;
+
+  for (i=0;err_classes[i].class;i++)
+    if (err_classes[i].code == class)
+      {
+	if (err_classes[i].err_msgs)
+	  {
+	    err_code_struct *err = err_classes[i].err_msgs;
+	    for (j=0;err[j].name;j++)
+	      if (num == err[j].code)
+		{
+		  snprintf(ret,sizeof(ret),"%s - %s (%s)",err_classes[i].class,
+			  err[j].name,err[j].message);
+		  return ret;
+		}
+	  }
+
+	snprintf(ret,sizeof(ret),"%s - %d",err_classes[i].class,num);
+	return ret;
+      }
+
+  snprintf(ret,sizeof(ret),"ERROR: Unknown error (%d,%d)",class,num);
+  return(ret);
+}