print-smb.c

/*
 * 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: /tcpdump/master/tcpdump/print-smb.c,v 1.17 2001-07-28 22:59:30 guy Exp $";
#endif

#include <stdio.h>
#include <string.h>
#include <sys/types.h>

#include "interface.h"
#include "smb.h"

static int request = 0;

const uchar *startbuf = NULL;

struct smbdescript {
    char *req_f1;
    char *req_f2;
    char *rep_f1;
    char *rep_f2;
    /*
     * sometimes (u_char *, u_char *, u_char *, u_char *) and
     * sometimes (u_char *, u_char *, int, int)
     */
    void (*fn)(const u_char *, const u_char *, ...);
};

struct smbfns
{
    int id;
    char *name;
    int flags;
    struct smbdescript descript;
};

#define DEFDESCRIPT	{ NULL, NULL, NULL, NULL, NULL }

#define FLG_CHAIN	(1 << 0)

static struct smbfns *
smbfind(int id, struct smbfns *list)
{
    int sindex;

    for (sindex = 0; list[sindex].name; sindex++)
	if (list[sindex].id == id)
	    return(&list[sindex]);

    return(&list[0]);
}

static void
trans2_findfirst(const uchar *param, const uchar *data, ...)
{
    char *fmt;
    va_list ap;
    int pcnt, dcnt;

    va_start(ap, data);
    pcnt = va_arg(ap, int);
    dcnt = va_arg(ap, int);
    va_end(ap);

    if (request)
	fmt = "Attribute=[A]\nSearchCount=[d]\nFlags=[w]\nLevel=[dP5]\nFile=[S]\n";
    else
	fmt = "Handle=[w]\nCount=[d]\nEOS=[w]\nEoffset=[d]\nLastNameOfs=[w]\n";

    fdata(param, fmt, param + pcnt);
    if (dcnt) {
	printf("data:\n");
	print_data(data, dcnt);
    }
}

static void
trans2_qfsinfo(const uchar *param, const uchar *data, ...)
{
    static int level = 0;
    char *fmt="";
    va_list ap;
    int pcnt, dcnt;

    va_start(ap, data);
    pcnt = va_arg(ap, int);
    dcnt = va_arg(ap, int);
    va_end(ap);

    if (request) {
	level = SVAL(param, 0);
	fmt = "InfoLevel=[d]\n";
	fdata(param, fmt, param + pcnt);
    } else {
	switch (level) {
	case 1:
	    fmt = "idFileSystem=[W]\nSectorUnit=[D]\nUnit=[D]\nAvail=[D]\nSectorSize=[d]\n";
	    break;
	case 2:
	    fmt = "CreationTime=[T2]VolNameLength=[B]\nVolumeLabel=[s12]\n";
	    break;
	case 0x105:
	    fmt = "Capabilities=[W]\nMaxFileLen=[D]\nVolNameLen=[D]\nVolume=[S]\n";
	    break;
	default:
	    fmt = "UnknownLevel\n";
	    break;
	}
	fdata(data, fmt, data + dcnt);
    }
    if (dcnt) {
	printf("data:\n");
	print_data(data, dcnt);
    }
}

struct smbfns trans2_fns[] = {
    { 0, "TRANSACT2_OPEN", 0,
	{ "Flags2=[w]\nMode=[w]\nSearchAttrib=[A]\nAttrib=[A]\nTime=[T2]\nOFun=[w]\nSize=[D]\nRes=([w, w, w, w, w])\nPath=[S]",
	  NULL,
	  "Handle=[d]\nAttrib=[A]\nTime=[T2]\nSize=[D]\nAccess=[w]\nType=[w]\nState=[w]\nAction=[w]\nInode=[W]\nOffErr=[d]\n|EALength=[d]\n",
	  NULL, NULL }},
    { 1, "TRANSACT2_FINDFIRST", 0,
	{ NULL, NULL, NULL, NULL, trans2_findfirst }},
    { 2, "TRANSACT2_FINDNEXT", 0, DEFDESCRIPT },
    { 3, "TRANSACT2_QFSINFO", 0,
	{ NULL, NULL, NULL, NULL, trans2_qfsinfo }},
    { 4, "TRANSACT2_SETFSINFO", 0, DEFDESCRIPT },
    { 5, "TRANSACT2_QPATHINFO", 0, DEFDESCRIPT },
    { 6, "TRANSACT2_SETPATHINFO", 0, DEFDESCRIPT },
    { 7, "TRANSACT2_QFILEINFO", 0, DEFDESCRIPT },
    { 8, "TRANSACT2_SETFILEINFO", 0, DEFDESCRIPT },
    { 9, "TRANSACT2_FSCTL", 0, DEFDESCRIPT },
    { 10, "TRANSACT2_IOCTL", 0, DEFDESCRIPT },
    { 11, "TRANSACT2_FINDNOTIFYFIRST", 0, DEFDESCRIPT },
    { 12, "TRANSACT2_FINDNOTIFYNEXT", 0, DEFDESCRIPT },
    { 13, "TRANSACT2_MKDIR", 0, DEFDESCRIPT },
    { -1, NULL, 0, DEFDESCRIPT }
};


static void
print_trans2(const uchar *words, const uchar *dat, ...)
{
    static struct smbfns *fn = &trans2_fns[0];
    uchar *data, *param;
    uchar *f1 = NULL, *f2 = NULL;
    int pcnt, dcnt;
    va_list ap;
    uchar *buf, *maxbuf;

    va_start(ap, dat);
    buf = va_arg(ap, uchar *);
    maxbuf = va_arg(ap, uchar *);
    va_end(ap);

    if (request) {
	fn = smbfind(SVAL(words + 1, 14 * 2), trans2_fns);
	data = buf+SVAL(words + 1, 12 * 2);
	param = buf+SVAL(words + 1, 10 * 2);
	pcnt = SVAL(words + 1, 9 * 2);
	dcnt = SVAL(words + 1, 11 * 2);
    } else {
	data = buf+SVAL(words + 1, 7 * 2);
	param = buf+SVAL(words + 1, 4 * 2);
	pcnt = SVAL(words + 1, 3 * 2);
	dcnt = SVAL(words + 1, 6 * 2);
    }

    printf("%s param_length=%d data_length=%d\n", fn->name, pcnt, dcnt);

    if (request) {
	if (CVAL(words, 0) == 8) {
	    fdata(words + 1,
		"Trans2Secondary\nTotParam=[d]\nTotData=[d]\nParamCnt=[d]\nParamOff=[d]\nParamDisp=[d]\nDataCnt=[d]\nDataOff=[d]\nDataDisp=[d]\nHandle=[d]\n",
		maxbuf);
	    return;
	} else {
	    fdata(words + 1,
		"TotParam=[d]\nTotData=[d]\nMaxParam=[d]\nMaxData=[d]\nMaxSetup=[d]\nFlags=[w]\nTimeOut=[D]\nRes1=[w]\nParamCnt=[d]\nParamOff=[d]\nDataCnt=[d]\nDataOff=[d]\nSetupCnt=[d]\n",
		words + 1 + 14 * 2);
	    fdata(data + 1, "TransactionName=[S]\n%", maxbuf);
	}
	f1 = fn->descript.req_f1;
	f2 = fn->descript.req_f2;
    } else {
	if (CVAL(words, 0) == 0) {
	    printf("Trans2Interim\n");
	    return;
	} else {
	    fdata(words + 1,
		"TotParam=[d]\nTotData=[d]\nRes1=[w]\nParamCnt=[d]\nParamOff=[d]\nParamDisp[d]\nDataCnt=[d]\nDataOff=[d]\nDataDisp=[d]\nSetupCnt=[d]\n",
		words + 1 + 10 * 2);
	}
	f1 = fn->descript.rep_f1;
	f2 = fn->descript.rep_f2;
    }

    if (fn->descript.fn)
	fn->descript.fn(param, data, pcnt, dcnt);
    else {
	fdata(param, f1 ? f1 : (uchar *)"Paramaters=\n", param + pcnt);
	fdata(data, f2 ? f2 : (uchar *)"Data=\n", data + dcnt);
    }
}


static void
print_browse(uchar *param, int paramlen, const uchar *data, int datalen)
{
    const uchar *maxbuf = data + datalen;
    int command = CVAL(data, 0);

    fdata(param, "BROWSE PACKET\n|Param ", param+paramlen);

    switch (command) {
    case 0xF:
	data = fdata(data,
	    "BROWSE PACKET:\nType=[B] (LocalMasterAnnouncement)\nUpdateCount=[w]\nRes1=[B]\nAnnounceInterval=[d]\nName=[n2]\nMajorVersion=[B]\nMinorVersion=[B]\nServerType=[W]\nElectionVersion=[w]\nBrowserConstant=[w]\n",
	    maxbuf);
	break;

    case 0x1:
	data = fdata(data,
	    "BROWSE PACKET:\nType=[B] (HostAnnouncement)\nUpdateCount=[w]\nRes1=[B]\nAnnounceInterval=[d]\nName=[n2]\nMajorVersion=[B]\nMinorVersion=[B]\nServerType=[W]\nElectionVersion=[w]\nBrowserConstant=[w]\n",
	    maxbuf);
	break;

    case 0x2:
	data = fdata(data,
	    "BROWSE PACKET:\nType=[B] (AnnouncementRequest)\nFlags=[B]\nReplySystemName=[S]\n",
	    maxbuf);
	break;

    case 0xc:
	data = fdata(data,
	    "BROWSE PACKET:\nType=[B] (WorkgroupAnnouncement)\nUpdateCount=[w]\nRes1=[B]\nAnnounceInterval=[d]\nName=[n2]\nMajorVersion=[B]\nMinorVersion=[B]\nServerType=[W]\nCommentPointer=[W]\nServerName=[S]\n",
	    maxbuf);
	break;

    case 0x8:
	data = fdata(data,
	    "BROWSE PACKET:\nType=[B] (ElectionFrame)\nElectionVersion=[B]\nOSSummary=[W]\nUptime=[(W, W)]\nServerName=[S]\n",
	    maxbuf);
	break;

    case 0xb:
	data = fdata(data,
	    "BROWSE PACKET:\nType=[B] (BecomeBackupBrowser)\nName=[S]\n",
	    maxbuf);
	break;

    case 0x9:
	data = fdata(data,
	    "BROWSE PACKET:\nType=[B] (GetBackupList)\nListCount?=[B]\nToken?=[B]\n",
	    maxbuf);
	break;

    case 0xa:
	data = fdata(data,
	    "BROWSE PACKET:\nType=[B] (BackupListResponse)\nServerCount?=[B]\nToken?=[B]*Name=[S]\n",
	    maxbuf);
	break;

    case 0xd:
	data = fdata(data,
	    "BROWSE PACKET:\nType=[B] (MasterAnnouncement)\nMasterName=[S]\n",
	    maxbuf);
	break;

    case 0xe:
	data = fdata(data,
	    "BROWSE PACKET:\nType=[B] (ResetBrowser)\nOptions=[B]\n", maxbuf);
	break;

    default:
	data = fdata(data, "Unknown Browser Frame ", maxbuf);
	break;
    }
}


static void
print_ipc(uchar *param, int paramlen, uchar *data, int datalen)
{
    if (paramlen)
	fdata(param, "Command=[w]\nStr1=[S]\nStr2=[S]\n", param + paramlen);
    if (datalen)
	fdata(data, "IPC ", data + datalen);
}


static void
print_trans(const uchar *words, const uchar *data1, ...)
{
    uchar *f1, *f2, *f3, *f4;
    uchar *data, *param;
    int datalen, paramlen;
    va_list ap;
    uchar *buf, *maxbuf;

    va_start(ap, data1);
    buf = va_arg(ap, uchar *);
    maxbuf = va_arg(ap, uchar *);
    va_end(ap);

    if (request) {
	paramlen = SVAL(words + 1, 9 * 2);
	param = buf + SVAL(words + 1, 10 * 2);
	datalen = SVAL(words + 1, 11 * 2);
	data = buf + SVAL(words + 1, 12 * 2);
	f1 = "TotParamCnt=[d] \nTotDataCnt=[d] \nMaxParmCnt=[d] \nMaxDataCnt=[d]\nMaxSCnt=[d] \nTransFlags=[w] \nRes1=[w] \nRes2=[w] \nRes3=[w]\nParamCnt=[d] \nParamOff=[d] \nDataCnt=[d] \nDataOff=[d] \nSUCnt=[d]\n";
	f2 = "|Name=[S]\n";
	f3 = "|Param ";
	f4 = "|Data ";
    } else {
	paramlen = SVAL(words + 1, 3 * 2);
	param = buf + SVAL(words + 1, 4 * 2);
	datalen = SVAL(words + 1, 6 * 2);
	data = buf + SVAL(words + 1, 7 * 2);
	f1 = "TotParamCnt=[d] \nTotDataCnt=[d] \nRes1=[d]\nParamCnt=[d] \nParamOff=[d] \nRes2=[d] \nDataCnt=[d] \nDataOff=[d] \nRes3=[d]\nLsetup=[d]\n";
	f2 = "|Unknown ";
	f3 = "|Param ";
	f4 = "|Data ";
    }

    fdata(words + 1, f1, MIN(words + 1 + 2 * CVAL(words, 0), maxbuf));
    fdata(data1 + 2, f2, maxbuf - (paramlen + datalen));

    if (!strcmp(data1 + 2, "\\MAILSLOT\\BROWSE")) {
	print_browse(param, paramlen, data, datalen);
	return;
    }

    if (!strcmp(data1 + 2, "\\PIPE\\LANMAN")) {
	print_ipc(param, paramlen, data, datalen);
	return;
    }

    if (paramlen)
	fdata(param, f3, MIN(param + paramlen, maxbuf));
    if (datalen)
	fdata(data, f4, MIN(data + datalen, maxbuf));
}


static void
print_negprot(const uchar *words, const uchar *data, ...)
{
    uchar *f1 = NULL, *f2 = NULL;
    va_list ap;
    uchar *buf, *maxbuf;

    va_start(ap, data);
    buf = va_arg(ap, uchar *);
    maxbuf = va_arg(ap, uchar *);
    va_end(ap);

    if (request)
	f2 = "*|Dialect=[Z]\n";
    else {
	if (CVAL(words, 0) == 1)
	    f1 = "Core Protocol\nDialectIndex=[d]";
	else if (CVAL(words, 0) == 17)
	    f1 = "NT1 Protocol\nDialectIndex=[d]\nSecMode=[B]\nMaxMux=[d]\nNumVcs=[d]\nMaxBuffer=[D]\nRawSize=[D]\nSessionKey=[W]\nCapabilities=[W]\nServerTime=[T3]TimeZone=[d]\nCryptKey=";
	else if (CVAL(words, 0) == 13)
	    f1 = "Coreplus/Lanman1/Lanman2 Protocol\nDialectIndex=[d]\nSecMode=[w]\nMaxXMit=[d]\nMaxMux=[d]\nMaxVcs=[d]\nBlkMode=[w]\nSessionKey=[W]\nServerTime=[T1]TimeZone=[d]\nRes=[W]\nCryptKey=";
    }

    if (f1)
	fdata(words + 1, f1, MIN(words + 1 + CVAL(words, 0) * 2, maxbuf));
    else
	print_data(words + 1, MIN(CVAL(words, 0) * 2,
	    PTR_DIFF(maxbuf, words + 1)));

    if (f2)
	fdata(data + 2, f2, MIN(data + 2 + SVAL(data, 0), maxbuf));
    else
	print_data(data + 2, MIN(SVAL(data, 0), PTR_DIFF(maxbuf, data + 2)));
}

static void
print_sesssetup(const uchar *words, const uchar *data, ...)
{
    int wcnt = CVAL(words, 0);
    uchar *f1 = NULL, *f2 = NULL;
    va_list ap;
    uchar *buf, *maxbuf;

    va_start(ap, data);
    buf = va_arg(ap, uchar *);
    maxbuf = va_arg(ap, uchar *);
    va_end(ap);

    if (request) {
	if (wcnt == 10)
	    f1 = "Com2=[w]\nOff2=[d]\nBufSize=[d]\nMpxMax=[d]\nVcNum=[d]\nSessionKey=[W]\nPassLen=[d]\nCryptLen=[d]\nCryptOff=[d]\nPass&Name=\n";
	else
	    f1 = "Com2=[B]\nRes1=[B]\nOff2=[d]\nMaxBuffer=[d]\nMaxMpx=[d]\nVcNumber=[d]\nSessionKey=[W]\nCaseInsensitivePasswordLength=[d]\nCaseSensitivePasswordLength=[d]\nRes=[W]\nCapabilities=[W]\nPass1&Pass2&Account&Domain&OS&LanMan=\n";
    } else {
	if (CVAL(words,0) == 3) {
	f1 = "Com2=[w]\nOff2=[d]\nAction=[w]\n";
	} else if (CVAL(words,0) == 13) {
	f1 = "Com2=[B]\nRes=[B]\nOff2=[d]\nAction=[w]\n";
	f2 = "NativeOS=[S]\nNativeLanMan=[S]\nPrimaryDomain=[S]\n";
	}
    }

    if (f1)
	fdata(words + 1, f1, MIN(words + 1 + CVAL(words, 0) * 2, maxbuf));
    else
	print_data(words + 1, MIN(CVAL(words, 0) * 2,
	    PTR_DIFF(maxbuf, words + 1)));

    if (f2)
	fdata(data + 2, f2, MIN(data + 2 + SVAL(data, 0), maxbuf));
    else
	print_data(data + 2, MIN(SVAL(data, 0), PTR_DIFF(maxbuf, data+2)));
}


static struct smbfns smb_fns[] = {
    { -1, "SMBunknown", 0, DEFDESCRIPT },

    { SMBtcon, "SMBtcon", 0,
	{ NULL, "Path=[Z]\nPassword=[Z]\nDevice=[Z]\n",
	  "MaxXmit=[d]\nTreeId=[d]\n", NULL,
	  NULL } },

    { SMBtdis, "SMBtdis", 0, DEFDESCRIPT },
    { SMBexit,  "SMBexit", 0, DEFDESCRIPT },
    { SMBioctl, "SMBioctl", 0, DEFDESCRIPT },

    { SMBecho, "SMBecho", 0,
	{ "ReverbCount=[d]\n", NULL,
	  "SequenceNum=[d]\n", NULL,
	  NULL } },

    { SMBulogoffX, "SMBulogoffX", FLG_CHAIN, DEFDESCRIPT },

    { SMBgetatr, "SMBgetatr", 0,
	{ NULL, "Path=[Z]\n",
	  "Attribute=[A]\nTime=[T2]Size=[D]\nRes=([w,w,w,w,w])\n", NULL,
	  NULL } },

    { SMBsetatr, "SMBsetatr", 0,
	{ "Attribute=[A]\nTime=[T2]Res=([w,w,w,w,w])\n", "Path=[Z]\n",
	  NULL, NULL, NULL } },

    { SMBchkpth, "SMBchkpth", 0,
       { NULL, "Path=[Z]\n", NULL, NULL, NULL } },

    { SMBsearch, "SMBsearch", 0,
	{ "Count=[d]\nAttrib=[A]\n",
	  "Path=[Z]\nBlkType=[B]\nBlkLen=[d]\n|Res1=[B]\nMask=[s11]\nSrv1=[B]\nDirIndex=[d]\nSrv2=[w]\nRes2=[W]\n",
	  "Count=[d]\n",
	  "BlkType=[B]\nBlkLen=[d]\n*\nRes1=[B]\nMask=[s11]\nSrv1=[B]\nDirIndex=[d]\nSrv2=[w]\nRes2=[W]\nAttrib=[a]\nTime=[T1]Size=[D]\nName=[s13]\n",
	  NULL } },

    { SMBopen, "SMBopen", 0,
	{ "Mode=[w]\nAttribute=[A]\n", "Path=[Z]\n",
	  "Handle=[d]\nOAttrib=[A]\nTime=[T2]Size=[D]\nAccess=[w]\n",
	  NULL, NULL } },

    { SMBcreate, "SMBcreate", 0,
	{ "Attrib=[A]\nTime=[T2]", "Path=[Z]\n", "Handle=[d]\n", NULL, NULL } },

    { SMBmknew, "SMBmknew", 0,
	{ "Attrib=[A]\nTime=[T2]", "Path=[Z]\n", "Handle=[d]\n", NULL, NULL } },

    { SMBunlink, "SMBunlink", 0,
	{ "Attrib=[A]\n", "Path=[Z]\n", NULL, NULL, NULL } },

    { SMBread, "SMBread", 0,
	{ "Handle=[d]\nByteCount=[d]\nOffset=[D]\nCountLeft=[d]\n", NULL,
	  "Count=[d]\nRes=([w,w,w,w])\n", NULL, NULL } },

    { SMBwrite, "SMBwrite", 0,
	{ "Handle=[d]\nByteCount=[d]\nOffset=[D]\nCountLeft=[d]\n", NULL,
	  "Count=[d]\n", NULL, NULL } },

    { SMBclose, "SMBclose", 0,
	{ "Handle=[d]\nTime=[T2]", NULL, NULL, NULL, NULL } },

    { SMBmkdir, "SMBmkdir", 0,
	{ NULL, "Path=[Z]\n", NULL, NULL, NULL } },

    { SMBrmdir, "SMBrmdir", 0,
	{ NULL, "Path=[Z]\n", NULL, NULL, NULL } },

    { SMBdskattr, "SMBdskattr", 0,
	{ NULL, NULL,
	  "TotalUnits=[d]\nBlocksPerUnit=[d]\nBlockSize=[d]\nFreeUnits=[d]\nMedia=[w]\n",
	  NULL, NULL } },

    { SMBmv, "SMBmv", 0,
	{ "Attrib=[A]\n", "OldPath=[Z]\nNewPath=[Z]\n", NULL, NULL, NULL } },

    /*
     * this is a Pathworks specific call, allowing the
     * changing of the root path
     */
    { pSETDIR, "SMBsetdir", 0, { NULL, "Path=[Z]\n", NULL, NULL, NULL } },

    { SMBlseek, "SMBlseek", 0,
	{ "Handle=[d]\nMode=[w]\nOffset=[D]\n", "Offset=[D]\n", NULL, NULL } },

    { SMBflush, "SMBflush", 0, { "Handle=[d]\n", NULL, NULL, NULL, NULL } },

    { SMBsplopen, "SMBsplopen", 0,
	{ "SetupLen=[d]\nMode=[w]\n", "Ident=[Z]\n", "Handle=[d]\n",
	  NULL, NULL } },

    { SMBsplclose, "SMBsplclose", 0,
	{ "Handle=[d]\n", NULL, NULL, NULL, NULL } },

    { SMBsplretq, "SMBsplretq", 0,
	{ "MaxCount=[d]\nStartIndex=[d]\n", NULL,
	  "Count=[d]\nIndex=[d]\n",
	  "*Time=[T2]Status=[B]\nJobID=[d]\nSize=[D]\nRes=[B]Name=[s16]\n",
	  NULL } },

    { SMBsplwr, "SMBsplwr", 0,
	{ "Handle=[d]\n", NULL, NULL, NULL, NULL } },

    { SMBlock, "SMBlock", 0,
	{ "Handle=[d]\nCount=[D]\nOffset=[D]\n", NULL, NULL, NULL, NULL } },

    { SMBunlock, "SMBunlock", 0,
	{ "Handle=[d]\nCount=[D]\nOffset=[D]\n", NULL, NULL, NULL, NULL } },

    /* CORE+ PROTOCOL FOLLOWS */

    { SMBreadbraw, "SMBreadbraw", 0,
	{ "Handle=[d]\nOffset=[D]\nMaxCount=[d]\nMinCount=[d]\nTimeOut=[D]\nRes=[d]\n",
	  NULL, NULL, NULL, NULL } },

    { SMBwritebraw, "SMBwritebraw", 0,
	{ "Handle=[d]\nTotalCount=[d]\nRes=[w]\nOffset=[D]\nTimeOut=[D]\nWMode=[w]\nRes2=[W]\n|DataSize=[d]\nDataOff=[d]\n",
	  NULL, "WriteRawAck", NULL, NULL } },

    { SMBwritec, "SMBwritec", 0,
	{ NULL, NULL, "Count=[d]\n", NULL, NULL } },

    { SMBwriteclose, "SMBwriteclose", 0,
	{ "Handle=[d]\nCount=[d]\nOffset=[D]\nTime=[T2]Res=([w,w,w,w,w,w])",
	  NULL, "Count=[d]\n", NULL, NULL } },

    { SMBlockread, "SMBlockread", 0,
	{ "Handle=[d]\nByteCount=[d]\nOffset=[D]\nCountLeft=[d]\n", NULL,
	  "Count=[d]\nRes=([w,w,w,w])\n", NULL, NULL } },

    { SMBwriteunlock, "SMBwriteunlock", 0,
	{ "Handle=[d]\nByteCount=[d]\nOffset=[D]\nCountLeft=[d]\n", NULL,
	  "Count=[d]\n", NULL, NULL } },

    { SMBreadBmpx, "SMBreadBmpx", 0,
	{ "Handle=[d]\nOffset=[D]\nMaxCount=[d]\nMinCount=[d]\nTimeOut=[D]\nRes=[w]\n",
	  NULL,
	  "Offset=[D]\nTotCount=[d]\nRemaining=[d]\nRes=([w,w])\nDataSize=[d]\nDataOff=[d]\n",
	  NULL, NULL } },

    { SMBwriteBmpx, "SMBwriteBmpx", 0,
	{ "Handle=[d]\nTotCount=[d]\nRes=[w]\nOffset=[D]\nTimeOut=[D]\nWMode=[w]\nRes2=[W]\nDataSize=[d]\nDataOff=[d]\n", NULL,
	  "Remaining=[d]\n", NULL, NULL } },

    { SMBwriteBs, "SMBwriteBs", 0,
	{ "Handle=[d]\nTotCount=[d]\nOffset=[D]\nRes=[W]\nDataSize=[d]\nDataOff=[d]\n",
	  NULL, "Count=[d]\n", NULL, NULL } },

    { SMBsetattrE, "SMBsetattrE", 0,
	{ "Handle=[d]\nCreationTime=[T2]AccessTime=[T2]ModifyTime=[T2]", NULL,
	  NULL, NULL, NULL } },

    { SMBgetattrE, "SMBgetattrE", 0,
	{ "Handle=[d]\n", NULL,
	  "CreationTime=[T2]AccessTime=[T2]ModifyTime=[T2]Size=[D]\nAllocSize=[D]\nAttribute=[A]\n",
	  NULL, NULL } },

    { SMBtranss, "SMBtranss", 0, DEFDESCRIPT },
    { SMBioctls, "SMBioctls", 0, DEFDESCRIPT },

    { SMBcopy, "SMBcopy", 0,
	{ "TreeID2=[d]\nOFun=[w]\nFlags=[w]\n", "Path=[S]\nNewPath=[S]\n",
	  "CopyCount=[d]\n",  "|ErrStr=[S]\n",  NULL } },

    { SMBmove, "SMBmove", 0,
	{ "TreeID2=[d]\nOFun=[w]\nFlags=[w]\n", "Path=[S]\nNewPath=[S]\n",
	  "MoveCount=[d]\n",  "|ErrStr=[S]\n",  NULL } },

    { SMBopenX, "SMBopenX", FLG_CHAIN,
	{ "Com2=[w]\nOff2=[d]\nFlags=[w]\nMode=[w]\nSearchAttrib=[A]\nAttrib=[A]\nTime=[T2]OFun=[w]\nSize=[D]\nTimeOut=[D]\nRes=[W]\n",
	  "Path=[S]\n",
	  "Com2=[w]\nOff2=[d]\nHandle=[d]\nAttrib=[A]\nTime=[T2]Size=[D]\nAccess=[w]\nType=[w]\nState=[w]\nAction=[w]\nFileID=[W]\nRes=[w]\n",
	  NULL, NULL } },

    { SMBreadX, "SMBreadX", FLG_CHAIN,
	{ "Com2=[w]\nOff2=[d]\nHandle=[d]\nOffset=[D]\nMaxCount=[d]\nMinCount=[d]\nTimeOut=[D]\nCountLeft=[d]\n",
	  NULL,
	  "Com2=[w]\nOff2=[d]\nRemaining=[d]\nRes=[W]\nDataSize=[d]\nDataOff=[d]\nRes=([w,w,w,w])\n",
	  NULL, NULL } },

    { SMBwriteX, "SMBwriteX", FLG_CHAIN,
	{ "Com2=[w]\nOff2=[d]\nHandle=[d]\nOffset=[D]\nTimeOut=[D]\nWMode=[w]\nCountLeft=[d]\nRes=[w]\nDataSize=[d]\nDataOff=[d]\n",
	  NULL,
	  "Com2=[w]\nOff2=[d]\nCount=[d]\nRemaining=[d]\nRes=[W]\n",
	  NULL, NULL } },

    { SMBlockingX, "SMBlockingX", FLG_CHAIN,
	{ "Com2=[w]\nOff2=[d]\nHandle=[d]\nLockType=[w]\nTimeOut=[D]\nUnlockCount=[d]\nLockCount=[d]\n",
	  "*Process=[d]\nOffset=[D]\nLength=[D]\n",
	  "Com2=[w]\nOff2=[d]\n", NULL, NULL } },

    { SMBffirst, "SMBffirst", 0,
	{ "Count=[d]\nAttrib=[A]\n",
	  "Path=[Z]\nBlkType=[B]\nBlkLen=[d]\n|Res1=[B]\nMask=[s11]\nSrv1=[B]\nDirIndex=[d]\nSrv2=[w]\n",
	  "Count=[d]\n",
	  "BlkType=[B]\nBlkLen=[d]\n*\nRes1=[B]\nMask=[s11]\nSrv1=[B]\nDirIndex=[d]\nSrv2=[w]\nRes2=[W]\nAttrib=[a]\nTime=[T1]Size=[D]\nName=[s13]\n",
	  NULL } },

    { SMBfunique, "SMBfunique", 0,
	{ "Count=[d]\nAttrib=[A]\n",
	  "Path=[Z]\nBlkType=[B]\nBlkLen=[d]\n|Res1=[B]\nMask=[s11]\nSrv1=[B]\nDirIndex=[d]\nSrv2=[w]\n",
	  "Count=[d]\n",
	  "BlkType=[B]\nBlkLen=[d]\n*\nRes1=[B]\nMask=[s11]\nSrv1=[B]\nDirIndex=[d]\nSrv2=[w]\nRes2=[W]\nAttrib=[a]\nTime=[T1]Size=[D]\nName=[s13]\n",
	  NULL } },

    { SMBfclose, "SMBfclose", 0,
	{ "Count=[d]\nAttrib=[A]\n",
	  "Path=[Z]\nBlkType=[B]\nBlkLen=[d]\n|Res1=[B]\nMask=[s11]\nSrv1=[B]\nDirIndex=[d]\nSrv2=[w]\n",
	  "Count=[d]\n",
	  "BlkType=[B]\nBlkLen=[d]\n*\nRes1=[B]\nMask=[s11]\nSrv1=[B]\nDirIndex=[d]\nSrv2=[w]\nRes2=[W]\nAttrib=[a]\nTime=[T1]Size=[D]\nName=[s13]\n",
	  NULL } },

    { SMBfindnclose, "SMBfindnclose", 0,
	{ "Handle=[d]\n", NULL, NULL, NULL, NULL } },

    { SMBfindclose, "SMBfindclose", 0,
	{ "Handle=[d]\n", NULL, NULL, NULL, NULL } },

    { SMBsends, "SMBsends", 0,
	{ NULL, "Source=[Z]\nDest=[Z]\n", NULL, NULL, NULL } },

    { SMBsendstrt, "SMBsendstrt", 0,
	{ NULL, "Source=[Z]\nDest=[Z]\n", "GroupID=[d]\n", NULL, NULL } },

    { SMBsendend, "SMBsendend", 0,
	{ "GroupID=[d]\n", NULL, NULL, NULL, NULL } },

    { SMBsendtxt, "SMBsendtxt", 0,
	{ "GroupID=[d]\n", NULL, NULL, NULL, NULL } },

    { SMBsendb, "SMBsendb", 0,
	{ NULL, "Source=[Z]\nDest=[Z]\n", NULL, NULL, NULL } },

    { SMBfwdname, "SMBfwdname", 0, DEFDESCRIPT },
    { SMBcancelf, "SMBcancelf", 0, DEFDESCRIPT },
    { SMBgetmac, "SMBgetmac", 0, DEFDESCRIPT },

    { SMBnegprot, "SMBnegprot", 0,
	{ NULL, NULL, NULL, NULL, print_negprot } },

    { SMBsesssetupX, "SMBsesssetupX", FLG_CHAIN,
	{ NULL, NULL, NULL, NULL, print_sesssetup } },

    { SMBtconX, "SMBtconX", FLG_CHAIN,
	{ "Com2=[w]\nOff2=[d]\nFlags=[w]\nPassLen=[d]\nPasswd&Path&Device=\n",
	  NULL, "Com2=[w]\nOff2=[d]\n", "ServiceType=[S]\n", NULL } },

    { SMBtrans2, "SMBtrans2", 0, { NULL, NULL, NULL, NULL, print_trans2 } },

    { SMBtranss2, "SMBtranss2", 0, DEFDESCRIPT },
    { SMBctemp, "SMBctemp", 0, DEFDESCRIPT },
    { SMBreadBs, "SMBreadBs", 0, DEFDESCRIPT },
    { SMBtrans, "SMBtrans", 0, { NULL, NULL, NULL, NULL, print_trans } },

    { SMBnttrans, "SMBnttrans", 0, DEFDESCRIPT },
    { SMBnttranss, "SMBnttranss", 0, DEFDESCRIPT },

    { SMBntcreateX, "SMBntcreateX", FLG_CHAIN,
	{ "Com2=[w]\nOff2=[d]\nRes=[b]\nNameLen=[d]\nFlags=[W]\nRootDirectoryFid=[D]\nAccessMask=[W]\nAllocationSize=[L]\nExtFileAttributes=[W]\nShareAccess=[W]\nCreateDisposition=[W]\nCreateOptions=[W]\nImpersonationLevel=[W]\nSecurityFlags=[b]\n",
	  "Path=[S]\n",
	  "Com2=[w]\nOff2=[d]\nOplockLevel=[b]\nFid=[d]\nCreateAction=[W]\nCreateTime=[T3]LastAccessTime=[T3]LastWriteTime=[T3]ChangeTime=[T3]ExtFileAttributes=[W]\nAllocationSize=[L]\nEndOfFile=[L]\nFileType=[w]\nDeviceState=[w]\nDirectory=[b]\n",
	  NULL } },

    { SMBntcancel, "SMBntcancel", 0, DEFDESCRIPT },

    { -1, NULL, 0, DEFDESCRIPT }
};


/*
 * print a SMB message
 */
static void
print_smb(const uchar *buf, const uchar *maxbuf)
{
    int command;
    const uchar *words, *data;
    struct smbfns *fn;
    char *fmt_smbheader =
        "[P4]SMB Command   =  [B]\nError class   =  [BP1]\nError code    =  [d]\nFlags1        =  [B]\nFlags2        =  [B][P13]\nTree ID       =  [d]\nProc ID       =  [d]\nUID           =  [d]\nMID           =  [d]\nWord Count    =  [b]\n";

    request = (CVAL(buf, 9) & 0x80) ? 0 : 1;

    command = CVAL(buf, 4);

    fn = smbfind(command, smb_fns);

    if (vflag > 1)
	printf("\n");

    printf("SMB PACKET: %s (%s)\n", fn->name, request ? "REQUEST" : "REPLY");

    if (vflag < 2)
	return;

    /* print out the header */
    fdata(buf, fmt_smbheader, buf + 33);

    if (CVAL(buf, 5)) {
	int class = CVAL(buf, 5);
	int num = SVAL(buf, 7);
	printf("SMBError = %s\n", smb_errstr(class, num));
    }

    words = buf + 32;
    data = words + 1 + CVAL(words,0)*2;

    while (words && data) {
	char *f1, *f2;
	int wct = CVAL(words, 0);

	if (request) {
	    f1 = fn->descript.req_f1;
	    f2 = fn->descript.req_f2;
	} else {
	    f1 = fn->descript.rep_f1;
	    f2 = fn->descript.rep_f2;
	}

	if (fn->descript.fn)
	    fn->descript.fn(words, data, buf, maxbuf);
	else {
	    if (f1) {
		printf("smbvwv[]=\n");
		fdata(words + 1, f1, words + 1 + wct * 2);
	    } else if (wct) {
		int i;
		int v;
		printf("smbvwv[]=\n");
		for (i = 0; i < wct; i++) {
		    v = SVAL(words + 1, 2 * i);
		    printf("smb_vwv[%d]=%d (0x%X)\n", i, v, v);
		}
	    }

	    if (f2) {
		printf("smbbuf[]=\n");
		fdata(data + 2, f2, maxbuf);
	    } else {
		int bcc = SVAL(data, 0);
		printf("smb_bcc=%d\n", bcc);
		if (bcc > 0) {
		    printf("smb_buf[]=\n");
		    print_data(data + 2, MIN(bcc, PTR_DIFF(maxbuf, data + 2)));
		}
	    }
	}

	if ((fn->flags & FLG_CHAIN) != 0&& CVAL(words, 0) &&
	    SVAL(words, 1) != 0xFF) {
	    command = SVAL(words, 1);
	    words = buf + SVAL(words, 3);
	    data = words + 1 + CVAL(words, 0) * 2;

	    fn = smbfind(command, smb_fns);

	    printf("\nSMB PACKET: %s (%s) (CHAINED)\n",
		fn->name, request ? "REQUEST" : "REPLY");
	} else
	    words = data = NULL;
    }

    printf("\n");
}


/*
 * print a NBT packet received across tcp on port 139
 */
void
nbt_tcp_print(const uchar *data, int length)
{
    const uchar *maxbuf = data + length;
    int flags = CVAL(data, 0);
    int nbt_len = RSVAL(data, 2);

    startbuf = data;
    if (maxbuf <= data)
	return;

    if (vflag > 1)
	printf ("\n>>> ");

    printf("NBT Packet");

    if (vflag < 2)
	return;

    printf("\n");

    switch (flags) {
    case 1:
	printf("flags=0x%x\n", flags);
    case 0:
	data = fdata(data, "NBT Session Packet\nFlags=[rw]\nLength=[rd]\n",
	    data + 4);
	if (data == NULL)
	    break;
	if (memcmp(data,"\377SMB",4) == 0) {
	    if (nbt_len > PTR_DIFF(maxbuf, data))
	    printf("WARNING: Short packet. Try increasing the snap length (%lu)\n",
	       (unsigned long)PTR_DIFF(maxbuf, data));
	    print_smb(data, maxbuf > data + nbt_len ? data + nbt_len : maxbuf);
	} else
	    printf("Session packet:(raw data?)\n");
	break;

	case 0x81:
	    data = fdata(data,
		"NBT Session Request\nFlags=[rW]\nDestination=[n1]\nSource=[n1]\n",
		maxbuf);
	    break;

	case 0x82:
	    data = fdata(data, "NBT Session Granted\nFlags=[rW]\n", maxbuf);
	    break;

	case 0x83:
	  {
	    int ecode = CVAL(data,4);

	    data = fdata(data, "NBT SessionReject\nFlags=[rW]\nReason=[B]\n",
		maxbuf);
	    switch (ecode) {
	    case 0x80:
		printf("Not listening on called name\n");
		break;
	    case 0x81:
		printf("Not listening for calling name\n");
		break;
	    case 0x82:
		printf("Called name not present\n");
		break;
	    case 0x83:
		printf("Called name present, but insufficient resources\n");
		break;
	    default:
		printf("Unspecified error 0x%X\n", ecode);
		break;
	    }
	  }
	    break;

	case 0x85:
	    data = fdata(data, "NBT Session Keepalive\nFlags=[rW]\n", maxbuf);
	    break;

	default:
	    printf("flags=0x%x\n", flags);
	    data = fdata(data, "NBT - Unknown packet type\nType=[rW]\n", maxbuf);
    }
    printf("\n");
    fflush(stdout);
}


/*
 * print a NBT packet received across udp on port 137
 */
void
nbt_udp137_print(const uchar *data, int length)
{
    const uchar *maxbuf = data + length;
    int name_trn_id = RSVAL(data, 0);
    int response = (CVAL(data, 2) >> 7);
    int opcode = (CVAL(data, 2) >> 3) & 0xF;
    int nm_flags = ((CVAL(data, 2) & 0x7) << 4) + (CVAL(data, 3) >> 4);
    int rcode = CVAL(data, 3) & 0xF;
    int qdcount = RSVAL(data, 4);
    int ancount = RSVAL(data, 6);
    int nscount = RSVAL(data, 8);
    int arcount = RSVAL(data, 10);
    char *opcodestr;
    const char *p;
    int total, i;

    startbuf = data;

    if (maxbuf <= data)
	return;

    if (vflag > 1)
	printf("\n>>> ");

    printf("NBT UDP PACKET(137): ");

    switch (opcode) {
    case 0: opcodestr = "QUERY"; break;
    case 5: opcodestr = "REGISTRATION"; break;
    case 6: opcodestr = "RELEASE"; break;
    case 7: opcodestr = "WACK"; break;
    case 8: opcodestr = "REFRESH(8)"; break;
    case 9: opcodestr = "REFRESH"; break;
    case 15: opcodestr = "MULTIHOMED REGISTRATION"; break;
    default: opcodestr = "OPUNKNOWN"; break;
    }
    printf("%s", opcodestr);
    if (response) {
	if (rcode)
	    printf("; NEGATIVE");
	else
	    printf("; POSITIVE");
    }

    if (response)
	printf("; RESPONSE");
    else
	printf("; REQUEST");

    if (nm_flags & 1)
	printf("; BROADCAST");
    else
	printf("; UNICAST");

    if (vflag < 2)
	return;

    printf("\nTrnID=0x%X\nOpCode=%d\nNmFlags=0x%X\nRcode=%d\nQueryCount=%d\nAnswerCount=%d\nAuthorityCount=%d\nAddressRecCount=%d\n",
	name_trn_id, opcode, nm_flags, rcode, qdcount, ancount, nscount,
	arcount);

    p = data + 12;

    total = ancount + nscount + arcount;

    if (qdcount > 100 || total > 100) {
	printf("Corrupt packet??\n");
	return;
    }

    if (qdcount) {
	printf("QuestionRecords:\n");
	for (i = 0; i < qdcount; i++)
	    p = fdata(p,
		"|Name=[n1]\nQuestionType=[rw]\nQuestionClass=[rw]\n#",
		maxbuf);
	if (p == NULL)
	    goto out;
    }

    if (total) {
	printf("\nResourceRecords:\n");
	for (i = 0; i < total; i++) {
	    int rdlen;
	    int restype;

	    p = fdata(p, "Name=[n1]\n#", maxbuf);
	    if (p == NULL)
		goto out;
	    restype = RSVAL(p, 0);
	    p = fdata(p, "ResType=[rw]\nResClass=[rw]\nTTL=[rD]\n", p + 8);
	    if (p == NULL)
		goto out;
	    rdlen = RSVAL(p, 0);
	    printf("ResourceLength=%d\nResourceData=\n", rdlen);
	    p += 2;
	    if (rdlen == 6) {
		p = fdata(p, "AddrType=[rw]\nAddress=[b.b.b.b]\n", p + rdlen);
		if (p == NULL)
		    goto out;
	    } else {
		if (restype == 0x21) {
		    int numnames = CVAL(p, 0);
		    p = fdata(p, "NumNames=[B]\n", p + 1);
		    if (p == NULL)
			goto out;
		    while (numnames--) {
			p = fdata(p, "Name=[n2]\t#", maxbuf);
			if (p[0] & 0x80)
			    printf("<GROUP> ");
			switch (p[0] & 0x60) {
			case 0x00: printf("B "); break;
			case 0x20: printf("P "); break;
			case 0x40: printf("M "); break;
			case 0x60: printf("_ "); break;
			}
			if (p[0] & 0x10)
			    printf("<DEREGISTERING> ");
			if (p[0] & 0x08)
			    printf("<CONFLICT> ");
			if (p[0] & 0x04)
			    printf("<ACTIVE> ");
			if (p[0] & 0x02)
			    printf("<PERMANENT> ");
			printf("\n");
			p += 2;
		    }
		} else {
		    print_data(p, min(rdlen, length - ((const uchar *)p - data)));
		    p += rdlen;
		}
	    }
	}
    }

    if ((uchar*)p < maxbuf)
	fdata(p, "AdditionalData:\n", maxbuf);

out:
    printf("\n");
    fflush(stdout);
}



/*
 * print a NBT packet received across udp on port 138
 */
void
nbt_udp138_print(const uchar *data, int length)
{
    const uchar *maxbuf = data + length;

    if (maxbuf > snapend)
	maxbuf = snapend;
    if (maxbuf <= data)
	return;
    startbuf = data;

    if (vflag < 2) {
	printf("NBT UDP PACKET(138)");
	return;
    }

    data = fdata(data,
	"\n>>> NBT UDP PACKET(138) Res=[rw] ID=[rw] IP=[b.b.b.b] Port=[rd] Length=[rd] Res2=[rw]\nSourceName=[n1]\nDestName=[n1]\n#",
	maxbuf);

    if (data != NULL)
	print_smb(data, maxbuf);

    printf("\n");
    fflush(stdout);
}


/*
   print netbeui frames
*/
void
netbeui_print(u_short control, const uchar *data, int length)
{
    const uchar *maxbuf = data + length;
    int len;
    int command;
    const uchar *data2;
    int is_truncated = 0;

    if (maxbuf > snapend)
	maxbuf = snapend;
    if (&data[7] >= maxbuf)
	goto out;
    len = SVAL(data,0);
    command = CVAL(data,4);
    data2 = data + len;
    if (data2 >= maxbuf) {
	data2 = maxbuf;
	is_truncated = 1;
    }

    startbuf = data;

    if (vflag < 2) {
	printf("NetBeui Packet");
	return;
    }

    printf("\n>>> NetBeui Packet\nType=0x%X ", control);
    data = fdata(data, "Length=[d] Signature=[w] Command=[B]\n#", maxbuf);
    if (data == NULL)
	goto out;

    switch (command) {
    case 0xA:
	data = fdata(data, "NameQuery:[P1]\nSessionNumber=[B]\nNameType=[B][P2]\nResponseCorrelator=[w]\nDestination=[n2]\nSource=[n2]\n", data2);
	break;

    case 0x8:
	data = fdata(data,
	    "NetbiosDataGram:[P7]\nDestination=[n2]\nSource=[n2]\n", data2);
	break;

    case 0xE:
	data = fdata(data,
	    "NameRecognise:\n[P1]\nData2=[w]\nTransmitCorrelator=[w]\nResponseCorelator=[w]\nDestination=[n2]\nSource=[n2]\n",
	    data2);
	break;

    case 0x19:
	data = fdata(data,
	    "SessionInitialise:\nData1=[B]\nData2=[w]\nTransmitCorrelator=[w]\nResponseCorelator=[w]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n",
	    data2);
	break;

    case 0x17:
	data = fdata(data,
	    "SessionConfirm:\nData1=[B]\nData2=[w]\nTransmitCorrelator=[w]\nResponseCorelator=[w]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n",
	    data2);
	break;

    case 0x16:
	data = fdata(data,
	    "NetbiosDataOnlyLast:\nFlags=[{|NO_ACK|PIGGYBACK_ACK_ALLOWED|PIGGYBACK_ACK_INCLUDED|}]\nResyncIndicator=[w][P2]\nResponseCorelator=[w]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n",
	    data2);
	break;

    case 0x14:
	data = fdata(data,
	    "NetbiosDataAck:\n[P3]TransmitCorrelator=[w][P2]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n",
	    data2);
	break;

    case 0x18:
	data = fdata(data,
	    "SessionEnd:\n[P1]Data2=[w][P4]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n",
	    data2);
	break;

    case 0x1f:
	data = fdata(data, "SessionAlive\n", data2);
	break;

    default:
	data = fdata(data, "Unknown Netbios Command ", data2);
	break;
    }
    if (data == NULL)
	goto out;

    if (is_truncated) {
	/* data2 was past the end of the buffer */
	goto out;
    }

    /* If there isn't enough data for "\377SMB", don't look for it. */
    if (&data2[3] >= maxbuf)
	goto out;

    if (memcmp(data2, "\377SMB",4) == 0)
	print_smb(data2, maxbuf);
    else {
	int i;
	for (i = 0; i < 128; i++) {
	    if (&data2[i + 3] >= maxbuf)
		break;
	    if (memcmp(&data2[i], "\377SMB", 4) == 0) {
		printf("found SMB packet at %d\n", i);
		print_smb(&data2[i], maxbuf);
		break;
	    }
	}
    }

out:
    printf("\n");
}


/*
 * print IPX-Netbios frames
 */
void
ipx_netbios_print(const uchar *data, u_int length)
{
    /*
     * this is a hack till I work out how to parse the rest of the
     * NetBIOS-over-IPX stuff
     */
    int i;
    const uchar *maxbuf;

    maxbuf = data + length;
    /* Don't go past the end of the captured data in the packet. */
    if (maxbuf > snapend)
	maxbuf = snapend;
    startbuf = data;
    for (i = 0; i < 128; i++) {
	if (&data[i + 4] > maxbuf)
	    break;
	if (memcmp(&data[i], "\377SMB", 4) == 0) {
	    fdata(data, "\n>>> IPX transport ", &data[i]);
	    if (data != NULL)
		print_smb(&data[i], maxbuf);
	    printf("\n");
	    fflush(stdout);
	    break;
	}
    }
    if (i == 128)
	fdata(data, "\n>>> Unknown IPX ", maxbuf);
}