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758 lines
19 KiB
C
758 lines
19 KiB
C
/*
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Copyright (C) Andrew Tridgell 1995-1999
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This software may be distributed either under the terms of the
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BSD-style license that accompanies tcpdump or the GNU GPL version 2
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or later */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifndef lint
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static const char rcsid[] =
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"@(#) $Header: /tcpdump/master/tcpdump/smbutil.c,v 1.12 2000/12/04 00:35:45 guy Exp $";
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#endif
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include "interface.h"
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#include "smb.h"
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extern const uchar *startbuf;
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/*******************************************************************
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interpret a 32 bit dos packed date/time to some parameters
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********************************************************************/
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static void interpret_dos_date(uint32 date,int *year,int *month,int *day,int *hour,int *minute,int *second)
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{
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uint32 p0,p1,p2,p3;
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p0=date&0xFF; p1=((date&0xFF00)>>8)&0xFF;
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p2=((date&0xFF0000)>>16)&0xFF; p3=((date&0xFF000000)>>24)&0xFF;
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*second = 2*(p0 & 0x1F);
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*minute = ((p0>>5)&0xFF) + ((p1&0x7)<<3);
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*hour = (p1>>3)&0xFF;
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*day = (p2&0x1F);
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*month = ((p2>>5)&0xFF) + ((p3&0x1)<<3) - 1;
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*year = ((p3>>1)&0xFF) + 80;
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}
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/*******************************************************************
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create a unix date from a dos date
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********************************************************************/
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static time_t make_unix_date(const void *date_ptr)
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{
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uint32 dos_date=0;
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struct tm t;
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dos_date = IVAL(date_ptr,0);
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if (dos_date == 0) return(0);
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interpret_dos_date(dos_date,&t.tm_year,&t.tm_mon,
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&t.tm_mday,&t.tm_hour,&t.tm_min,&t.tm_sec);
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t.tm_wday = 1;
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t.tm_yday = 1;
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t.tm_isdst = 0;
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return (mktime(&t));
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}
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/*******************************************************************
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create a unix date from a dos date
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********************************************************************/
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static time_t make_unix_date2(const void *date_ptr)
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{
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uint32 x,x2;
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x = IVAL(date_ptr,0);
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x2 = ((x&0xFFFF)<<16) | ((x&0xFFFF0000)>>16);
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SIVAL(&x,0,x2);
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return(make_unix_date((void *)&x));
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}
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/****************************************************************************
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interpret an 8 byte "filetime" structure to a time_t
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It's originally in "100ns units since jan 1st 1601"
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****************************************************************************/
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static time_t interpret_long_date(const char *p)
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{
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double d;
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time_t ret;
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/* this gives us seconds since jan 1st 1601 (approx) */
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d = (IVAL(p,4)*256.0 + CVAL(p,3)) * (1.0e-7 * (1<<24));
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/* now adjust by 369 years to make the secs since 1970 */
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d -= 369.0*365.25*24*60*60;
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/* and a fudge factor as we got it wrong by a few days */
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d += (3*24*60*60 + 6*60*60 + 2);
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if (d<0)
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return(0);
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ret = (time_t)d;
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return(ret);
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}
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/****************************************************************************
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interpret the weird netbios "name". Return the name type, or -1 if
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we run past the end of the buffer
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****************************************************************************/
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static int name_interpret(const uchar *in,const uchar *maxbuf,char *out)
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{
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int ret;
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int len;
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if (in >= maxbuf)
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return(-1); /* name goes past the end of the buffer */
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TCHECK2(*in, 1);
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len = (*in++) / 2;
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*out=0;
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if (len > 30 || len<1) return(0);
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while (len--)
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{
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if (in + 1 >= maxbuf)
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return(-1); /* name goes past the end of the buffer */
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TCHECK2(*in, 2);
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if (in[0] < 'A' || in[0] > 'P' || in[1] < 'A' || in[1] > 'P') {
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*out = 0;
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return(0);
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}
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*out = ((in[0]-'A')<<4) + (in[1]-'A');
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in += 2;
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out++;
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}
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*out = 0;
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ret = out[-1];
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return(ret);
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trunc:
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return(-1);
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}
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/****************************************************************************
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find a pointer to a netbios name
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****************************************************************************/
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static const uchar *name_ptr(const uchar *buf,int ofs,const uchar *maxbuf)
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{
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const uchar *p;
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uchar c;
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p = buf+ofs;
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if (p >= maxbuf)
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return(NULL); /* name goes past the end of the buffer */
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TCHECK2(*p, 1);
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c = *p;
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/* XXX - this should use the same code that the DNS dissector does */
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if ((c & 0xC0) == 0xC0)
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{
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uint16 l = RSVAL(buf, ofs) & 0x3FFF;
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if (l == 0)
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{
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/* We have a pointer that points to itself. */
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return(NULL);
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}
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p = buf + l;
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if (p >= maxbuf)
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return(NULL); /* name goes past the end of the buffer */
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TCHECK2(*p, 1);
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return(buf + l);
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}
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else
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return(buf+ofs);
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trunc:
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return(NULL); /* name goes past the end of the buffer */
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}
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/****************************************************************************
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extract a netbios name from a buf
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****************************************************************************/
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static int name_extract(const uchar *buf,int ofs,const uchar *maxbuf,char *name)
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{
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const uchar *p = name_ptr(buf,ofs,maxbuf);
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if (p == NULL)
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return(-1); /* error (probably name going past end of buffer) */
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strcpy(name,"");
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return(name_interpret(p,maxbuf,name));
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}
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/****************************************************************************
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return the total storage length of a mangled name
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****************************************************************************/
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static int name_len(const unsigned char *s, const unsigned char *maxbuf)
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{
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const unsigned char *s0 = s;
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unsigned char c;
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if (s >= maxbuf)
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return(-1); /* name goes past the end of the buffer */
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TCHECK2(*s, 1);
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c = *s;
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if ((c & 0xC0) == 0xC0)
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return(2);
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while (*s)
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{
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if (s >= maxbuf)
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return(-1); /* name goes past the end of the buffer */
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TCHECK2(*s, 1);
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s += (*s)+1;
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}
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return(PTR_DIFF(s,s0)+1);
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trunc:
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return(-1); /* name goes past the end of the buffer */
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}
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static void print_asc(const unsigned char *buf,int len)
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{
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int i;
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for (i=0;i<len;i++)
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printf("%c",isprint(buf[i])?buf[i]:'.');
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}
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static char *name_type_str(int name_type)
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{
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static char *f = NULL;
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switch (name_type) {
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case 0: f = "Workstation"; break;
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case 0x03: f = "Client?"; break;
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case 0x20: f = "Server"; break;
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case 0x1d: f = "Master Browser"; break;
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case 0x1b: f = "Domain Controller"; break;
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case 0x1e: f = "Browser Server"; break;
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default: f = "Unknown"; break;
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}
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return(f);
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}
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void print_data(const unsigned char *buf, int len)
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{
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int i=0;
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if (len<=0) return;
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printf("[%03X] ",i);
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for (i=0;i<len;) {
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printf("%02X ",(int)buf[i]);
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i++;
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if (i%8 == 0) printf(" ");
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if (i%16 == 0) {
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print_asc(&buf[i-16],8); printf(" ");
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print_asc(&buf[i-8],8); printf("\n");
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if (i<len) printf("[%03X] ",i);
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}
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}
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if (i%16) {
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int n;
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n = 16 - (i%16);
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printf(" ");
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if (n>8) printf(" ");
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while (n--) printf(" ");
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n = MIN(8,i%16);
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print_asc(&buf[i-(i%16)],n); printf(" ");
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n = (i%16) - n;
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if (n>0) print_asc(&buf[i-n],n);
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printf("\n");
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}
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}
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static void write_bits(unsigned int val,char *fmt)
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{
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char *p = fmt;
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int i=0;
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while ((p=strchr(fmt,'|'))) {
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int l = PTR_DIFF(p,fmt);
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if (l && (val & (1<<i)))
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printf("%.*s ",l,fmt);
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fmt = p+1;
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i++;
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}
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}
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/* convert a unicode string */
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static const char *unistr(const char *s, int *len)
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{
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static char buf[1000];
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int l=0;
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static int use_unicode = -1;
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if (use_unicode == -1) {
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char *p = getenv("USE_UNICODE");
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if (p && (atoi(p) == 1))
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use_unicode = 1;
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else
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use_unicode = 0;
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}
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/* maybe it isn't unicode - a cheap trick */
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if (!use_unicode || (s[0] && s[1])) {
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*len = strlen(s)+1;
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return s;
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}
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*len = 0;
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if (s[0] == 0 && s[1] != 0) {
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s++;
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*len = 1;
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}
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while (l < (sizeof(buf)-1) && s[0] && s[1] == 0) {
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buf[l] = s[0];
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s += 2; l++;
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*len += 2;
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}
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buf[l] = 0;
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*len += 2;
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return buf;
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}
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static const uchar *fdata1(const uchar *buf, const char *fmt, const uchar *maxbuf)
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{
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int reverse=0;
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char *attrib_fmt = "READONLY|HIDDEN|SYSTEM|VOLUME|DIR|ARCHIVE|";
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int len;
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while (*fmt && buf<maxbuf) {
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switch (*fmt) {
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case 'a':
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write_bits(CVAL(buf,0),attrib_fmt);
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buf++; fmt++;
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break;
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case 'A':
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write_bits(SVAL(buf,0),attrib_fmt);
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buf+=2; fmt++;
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break;
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case '{':
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{
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char bitfmt[128];
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char *p = strchr(++fmt,'}');
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int l = PTR_DIFF(p,fmt);
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strncpy(bitfmt,fmt,l);
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bitfmt[l]=0;
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fmt = p+1;
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write_bits(CVAL(buf,0),bitfmt);
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buf++;
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break;
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}
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case 'P':
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{
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int l = atoi(fmt+1);
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buf += l;
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fmt++;
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while (isdigit(*fmt)) fmt++;
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break;
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}
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case 'r':
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reverse = !reverse;
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fmt++;
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break;
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case 'D':
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{
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unsigned int x = reverse?RIVAL(buf,0):IVAL(buf,0);
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printf("%d (0x%x)",x, x);
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buf += 4;
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fmt++;
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break;
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}
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case 'L':
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{
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unsigned int x1 = reverse?RIVAL(buf,0):IVAL(buf,0);
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unsigned int x2 = reverse?RIVAL(buf,4):IVAL(buf,4);
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if (x2) {
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printf("0x%08x:%08x",x2, x1);
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} else {
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printf("%d (0x%08x%08x)",x1, x2, x1);
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}
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buf += 8;
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fmt++;
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break;
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}
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case 'd':
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{
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unsigned int x = reverse?RSVAL(buf,0):SVAL(buf,0);
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printf("%d (0x%x)",x, x);
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buf += 2;
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fmt++;
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break;
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}
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case 'W':
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{
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unsigned int x = reverse?RIVAL(buf,0):IVAL(buf,0);
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printf("0x%X",x);
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buf += 4;
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fmt++;
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break;
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}
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case 'w':
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{
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unsigned int x = reverse?RSVAL(buf,0):SVAL(buf,0);
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printf("0x%X",x);
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buf += 2;
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fmt++;
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break;
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}
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case 'B':
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{
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unsigned int x = CVAL(buf,0);
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printf("0x%X",x);
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buf += 1;
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fmt++;
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break;
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}
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case 'b':
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{
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unsigned int x = CVAL(buf,0);
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printf("%d (0x%x)",x, x);
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buf += 1;
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fmt++;
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break;
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}
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case 'S':
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{
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printf("%.*s",(int)PTR_DIFF(maxbuf,buf),unistr(buf, &len));
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buf += len;
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fmt++;
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break;
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}
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case 'Z':
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{
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if (*buf != 4 && *buf != 2)
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printf("Error! ASCIIZ buffer of type %d (safety=%d)\n",
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*buf,(int)PTR_DIFF(maxbuf,buf));
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printf("%.*s",(int)PTR_DIFF(maxbuf,buf+1),unistr(buf+1, &len));
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buf += len+1;
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fmt++;
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break;
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}
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case 's':
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{
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int l = atoi(fmt+1);
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printf("%-*.*s",l,l,buf);
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buf += l;
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fmt++; while (isdigit(*fmt)) fmt++;
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break;
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}
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case 'h':
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{
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int l = atoi(fmt+1);
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while (l--) printf("%02x",*buf++);
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fmt++; while (isdigit(*fmt)) fmt++;
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break;
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}
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case 'n':
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{
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int t = atoi(fmt+1);
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char nbuf[255];
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int name_type;
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int len;
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switch (t) {
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case 1:
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name_type = name_extract(startbuf,PTR_DIFF(buf,startbuf),maxbuf,
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nbuf);
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if (name_type < 0)
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goto trunc;
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len = name_len(buf,maxbuf);
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if (len < 0)
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goto trunc;
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buf += len;
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printf("%-15.15s NameType=0x%02X (%s)",
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nbuf,name_type,name_type_str(name_type));
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break;
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case 2:
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name_type = buf[15];
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printf("%-15.15s NameType=0x%02X (%s)",
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buf,name_type,name_type_str(name_type));
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buf += 16;
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break;
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}
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fmt++; while (isdigit(*fmt)) fmt++;
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break;
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}
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case 'T':
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{
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time_t t;
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int x = IVAL(buf,0);
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switch (atoi(fmt+1)) {
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case 1:
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if (x==0 || x==-1 || x==0xFFFFFFFF)
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t = 0;
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else
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t = make_unix_date(buf);
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buf+=4;
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break;
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case 2:
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if (x==0 || x==-1 || x==0xFFFFFFFF)
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t = 0;
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else
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t = make_unix_date2(buf);
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buf+=4;
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break;
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case 3:
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t = interpret_long_date(buf);
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buf+=8;
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break;
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}
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printf("%s",t?asctime(localtime(&t)):"NULL\n");
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fmt++; while (isdigit(*fmt)) fmt++;
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break;
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}
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default:
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putchar(*fmt);
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fmt++;
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break;
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}
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}
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if (buf>=maxbuf && *fmt)
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printf("END OF BUFFER\n");
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return(buf);
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trunc:
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printf("\n");
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printf("WARNING: Short packet. Try increasing the snap length\n");
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return(NULL);
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}
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const uchar *fdata(const uchar *buf, const char *fmt, const uchar *maxbuf)
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{
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static int depth=0;
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char s[128];
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char *p;
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while (*fmt) {
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switch (*fmt) {
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case '*':
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fmt++;
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while (buf < maxbuf) {
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const uchar *buf2;
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depth++;
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buf2 = fdata(buf,fmt,maxbuf);
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depth--;
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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);
|
|
}
|