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NetBSD/dist/tcpdump/smbutil.c

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/* $NetBSD: smbutil.c,v 1.2 2001/06/25 20:00:01 itojun 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
#include <sys/cdefs.h>
#ifndef lint
#if 0
static const char rcsid[] =
"@(#) Header: /tcpdump/master/tcpdump/smbutil.c,v 1.15 2001/06/25 18:58:09 itojun Exp";
#else
__RCSID("$NetBSD: smbutil.c,v 1.2 2001/06/25 20:00:01 itojun Exp $");
#endif
#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) */
name[0] = '\0';
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++)
safeputchar(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("%u (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 %u (safety=%lu)\n", *buf,
(unsigned long)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, ']');
if (p - fmt + 1 > sizeof(s)) {
/* overrun */
return(buf);
}
strncpy(s, fmt, p - fmt);
s[p - fmt] = '\0';
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) {
size_t len = PTR_DIFF(maxbuf, buf);
printf("Data: (%lu bytes)\n", (unsigned long)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);
}
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