* Western Research Laboratory
*/
-#ifndef lint
-static const char rcsid[] _U_ =
- "@(#) $Header: /tcpdump/master/tcpdump/parsenfsfh.c,v 1.29 2006-06-13 22:21:38 guy Exp $ (LBL)";
-#endif
-
#ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
#endif
-#include <tcpdump-stdinc.h>
+#include "netdissect-stdinc.h"
#include <stdio.h>
#include <string.h>
-#include "interface.h"
+#include "netdissect-ctype.h"
+
+#include "netdissect.h"
+#include "extract.h"
#include "nfsfh.h"
/*
#define FHT_HPUX9 11
#define FHT_BSD44 12
-#ifdef ultrix
-/* Nasty hack to keep the Ultrix C compiler from emitting bogus warnings */
-#define XFF(x) ((u_int32_t)(x))
-#else
-#define XFF(x) (x)
-#endif
-
-#define make_uint32(msb,b,c,lsb)\
- (XFF(lsb) + (XFF(c)<<8) + (XFF(b)<<16) + (XFF(msb)<<24))
-
-#define make_uint24(msb,b, lsb)\
- (XFF(lsb) + (XFF(b)<<8) + (XFF(msb)<<16))
-
-#define make_uint16(msb,lsb)\
- (XFF(lsb) + (XFF(msb)<<8))
-
-#ifdef __alpha
- /* or other 64-bit systems */
-#define make_uint48(msb,b,c,d,e,lsb)\
- ((lsb) + ((e)<<8) + ((d)<<16) + ((c)<<24) + ((b)<<32) + ((msb)<<40))
-#else
- /* on 32-bit systems ignore high-order bits */
-#define make_uint48(msb,b,c,d,e,lsb)\
- ((lsb) + ((e)<<8) + ((d)<<16) + ((c)<<24))
-#endif
-
-static int is_UCX(const unsigned char *);
+static int is_UCX(netdissect_options *, const unsigned char *, u_int);
void
-Parse_fh(fh, len, fsidp, inop, osnamep, fsnamep, ourself)
-register const unsigned char *fh;
-int len _U_;
-my_fsid *fsidp;
-u_int32_t *inop;
-const char **osnamep; /* if non-NULL, return OS name here */
-const char **fsnamep; /* if non-NULL, return server fs name here (for VMS) */
-int ourself; /* true if file handle was generated on this host */
+Parse_fh(netdissect_options *ndo, const unsigned char *fh, u_int len,
+ my_fsid *fsidp, uint32_t *inop,
+ const char **osnamep, /* if non-NULL, return OS name here */
+ const char **fsnamep, /* if non-NULL, return server fs name here (for VMS) */
+ int ourself) /* true if file handle was generated on this host */
{
- register const unsigned char *fhp = fh;
- u_int32_t temp;
+ const unsigned char *fhp = fh;
+ uint32_t temp;
int fhtype = FHT_UNKNOWN;
- int i;
+ u_int i;
- if (ourself) {
- /* File handle generated on this host, no need for guessing */
+ /*
+ * Require at least 16 bytes of file handle; it's variable-length
+ * in NFSv3. "len" is in units of 32-bit words, not bytes.
+ */
+ if (len < 16/4)
+ fhtype = FHT_UNKNOWN;
+ else {
+ if (ourself) {
+ /* File handle generated on this host, no need for guessing */
#if defined(IRIX40)
- fhtype = FHT_IRIX4;
+ fhtype = FHT_IRIX4;
#endif
#if defined(IRIX50)
- fhtype = FHT_IRIX5;
+ fhtype = FHT_IRIX5;
#endif
#if defined(IRIX51)
- fhtype = FHT_IRIX5;
+ fhtype = FHT_IRIX5;
#endif
#if defined(SUNOS4)
- fhtype = FHT_SUNOS4;
+ fhtype = FHT_SUNOS4;
#endif
#if defined(SUNOS5)
- fhtype = FHT_SUNOS5;
+ fhtype = FHT_SUNOS5;
#endif
#if defined(ultrix)
- fhtype = FHT_ULTRIX;
+ fhtype = FHT_ULTRIX;
#endif
#if defined(__osf__)
- fhtype = FHT_DECOSF;
+ fhtype = FHT_DECOSF;
#endif
#if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__) \
|| defined(__OpenBSD__)
- fhtype = FHT_BSD44;
-#endif
- }
- /*
- * This is basically a big decision tree
- */
- else if ((fhp[0] == 0) && (fhp[1] == 0)) {
- /* bytes[0,1] == (0,0); rules out Ultrix, IRIX5, SUNOS5 */
- /* probably rules out HP-UX, AIX unless they allow major=0 */
- if ((fhp[2] == 0) && (fhp[3] == 0)) {
- /* bytes[2,3] == (0,0); must be Auspex */
- /* XXX or could be Ultrix+MASSBUS "hp" disk? */
- fhtype = FHT_AUSPEX;
- }
- else {
- /*
- * bytes[2,3] != (0,0); rules out Auspex, could be
- * DECOSF, SUNOS4, or IRIX4
- */
- if ((fhp[4] != 0) && (fhp[5] == 0) &&
- (fhp[8] == 12) && (fhp[9] == 0)) {
- /* seems to be DECOSF, with minor == 0 */
- fhtype = FHT_DECOSF;
- }
- else {
- /* could be SUNOS4 or IRIX4 */
- /* XXX the test of fhp[5] == 8 could be wrong */
- if ((fhp[4] == 0) && (fhp[5] == 8) && (fhp[6] == 0) &&
- (fhp[7] == 0)) {
- /* looks like a length, not a file system typecode */
- fhtype = FHT_IRIX4;
- }
- else {
- /* by elimination */
- fhtype = FHT_SUNOS4;
- }
- }
- }
- }
- else {
- /*
- * bytes[0,1] != (0,0); rules out Auspex, IRIX4, SUNOS4
- * could be IRIX5, DECOSF, UCX, Ultrix, SUNOS5
- * could be AIX, HP-UX
- */
- if ((fhp[2] == 0) && (fhp[3] == 0)) {
- /*
- * bytes[2,3] == (0,0); rules out OSF, probably not UCX
- * (unless the exported device name is just one letter!),
- * could be Ultrix, IRIX5, AIX, or SUNOS5
- * might be HP-UX (depends on their values for minor devs)
- */
- if ((fhp[6] == 0) && (fhp[7] == 0)) {
fhtype = FHT_BSD44;
+#endif
}
- /*XXX we probably only need to test of these two bytes */
- else if ((fhp[21] == 0) && (fhp[23] == 0)) {
- fhtype = FHT_ULTRIX;
- }
- else {
- /* Could be SUNOS5/IRIX5, maybe AIX */
- /* XXX no obvious difference between SUNOS5 and IRIX5 */
- if (fhp[9] == 10)
- fhtype = FHT_SUNOS5;
- /* XXX what about AIX? */
- }
- }
- else {
/*
- * bytes[2,3] != (0,0); rules out Ultrix, could be
- * DECOSF, SUNOS5, IRIX5, AIX, HP-UX, or UCX
+ * This is basically a big decision tree
*/
- if ((fhp[8] == 12) && (fhp[9] == 0)) {
- fhtype = FHT_DECOSF;
- }
- else if ((fhp[8] == 0) && (fhp[9] == 10)) {
- /* could be SUNOS5/IRIX5, AIX, HP-UX */
- if ((fhp[7] == 0) && (fhp[6] == 0) &&
- (fhp[5] == 0) && (fhp[4] == 0)) {
- /* XXX is this always true of HP-UX? */
- fhtype = FHT_HPUX9;
- }
- else if (fhp[7] == 2) {
- /* This would be MNT_NFS on AIX, which is impossible */
- fhtype = FHT_SUNOS5; /* or maybe IRIX5 */
+ else if ((GET_U_1(fhp) == 0) && (GET_U_1(fhp + 1) == 0)) {
+ /* bytes[0,1] == (0,0); rules out Ultrix, IRIX5, SUNOS5 */
+ /* probably rules out HP-UX, AIX unless they allow major=0 */
+ if ((GET_U_1(fhp + 2) == 0) && (GET_U_1(fhp + 3) == 0)) {
+ /* bytes[2,3] == (0,0); must be Auspex */
+ /* XXX or could be Ultrix+MASSBUS "hp" disk? */
+ fhtype = FHT_AUSPEX;
}
else {
/*
- * XXX Could be SUNOS5/IRIX5 or AIX. I don't
- * XXX see any way to disambiguate these, so
- * XXX I'm going with the more likely guess.
- * XXX Sorry, Big Blue.
+ * bytes[2,3] != (0,0); rules out Auspex, could be
+ * DECOSF, SUNOS4, or IRIX4
*/
- fhtype = FHT_SUNOS5; /* or maybe IRIX5 */
+ if ((GET_U_1(fhp + 4) != 0) && (GET_U_1(fhp + 5) == 0) &&
+ (GET_U_1(fhp + 8) == 12) && (GET_U_1(fhp + 9) == 0)) {
+ /* seems to be DECOSF, with minor == 0 */
+ fhtype = FHT_DECOSF;
+ }
+ else {
+ /* could be SUNOS4 or IRIX4 */
+ /* XXX the test of fhp[5] == 8 could be wrong */
+ if ((GET_U_1(fhp + 4) == 0) && (GET_U_1(fhp + 5) == 8) && (GET_U_1(fhp + 6) == 0) &&
+ (GET_U_1(fhp + 7) == 0)) {
+ /* looks like a length, not a file system typecode */
+ fhtype = FHT_IRIX4;
+ }
+ else {
+ /* by elimination */
+ fhtype = FHT_SUNOS4;
+ }
+ }
}
- }
+ }
else {
- if (is_UCX(fhp)) {
- fhtype = FHT_VMSUCX;
+ /*
+ * bytes[0,1] != (0,0); rules out Auspex, IRIX4, SUNOS4
+ * could be IRIX5, DECOSF, UCX, Ultrix, SUNOS5
+ * could be AIX, HP-UX
+ */
+ if ((GET_U_1(fhp + 2) == 0) && (GET_U_1(fhp + 3) == 0)) {
+ /*
+ * bytes[2,3] == (0,0); rules out OSF, probably not UCX
+ * (unless the exported device name is just one letter!),
+ * could be Ultrix, IRIX5, AIX, or SUNOS5
+ * might be HP-UX (depends on their values for minor devs)
+ */
+ if ((GET_U_1(fhp + 6) == 0) && (GET_U_1(fhp + 7) == 0)) {
+ fhtype = FHT_BSD44;
+ }
+ /*XXX we probably only need to test of these two bytes */
+ else if ((len >= 24/4) && (GET_U_1(fhp + 21) == 0) && (GET_U_1(fhp + 23) == 0)) {
+ fhtype = FHT_ULTRIX;
+ }
+ else {
+ /* Could be SUNOS5/IRIX5, maybe AIX */
+ /* XXX no obvious difference between SUNOS5 and IRIX5 */
+ if (GET_U_1(fhp + 9) == 10)
+ fhtype = FHT_SUNOS5;
+ /* XXX what about AIX? */
+ }
}
else {
- fhtype = FHT_UNKNOWN;
+ /*
+ * bytes[2,3] != (0,0); rules out Ultrix, could be
+ * DECOSF, SUNOS5, IRIX5, AIX, HP-UX, or UCX
+ */
+ if ((GET_U_1(fhp + 8) == 12) && (GET_U_1(fhp + 9) == 0)) {
+ fhtype = FHT_DECOSF;
+ }
+ else if ((GET_U_1(fhp + 8) == 0) && (GET_U_1(fhp + 9) == 10)) {
+ /* could be SUNOS5/IRIX5, AIX, HP-UX */
+ if ((GET_U_1(fhp + 7) == 0) && (GET_U_1(fhp + 6) == 0) &&
+ (GET_U_1(fhp + 5) == 0) && (GET_U_1(fhp + 4) == 0)) {
+ /* XXX is this always true of HP-UX? */
+ fhtype = FHT_HPUX9;
+ }
+ else if (GET_U_1(fhp + 7) == 2) {
+ /* This would be MNT_NFS on AIX, which is impossible */
+ fhtype = FHT_SUNOS5; /* or maybe IRIX5 */
+ }
+ else {
+ /*
+ * XXX Could be SUNOS5/IRIX5 or AIX. I don't
+ * XXX see any way to disambiguate these, so
+ * XXX I'm going with the more likely guess.
+ * XXX Sorry, Big Blue.
+ */
+ fhtype = FHT_SUNOS5; /* or maybe IRIX5 */
+ }
+ }
+ else {
+ if (is_UCX(ndo, fhp, len)) {
+ fhtype = FHT_VMSUCX;
+ }
+ else {
+ fhtype = FHT_UNKNOWN;
+ }
+ }
}
}
- }
}
/* XXX still needs to handle SUNOS3 */
switch (fhtype) {
case FHT_AUSPEX:
- fsidp->Fsid_dev.Minor = fhp[7];
- fsidp->Fsid_dev.Major = fhp[6];
+ fsidp->Fsid_dev.Minor = GET_U_1(fhp + 7);
+ fsidp->Fsid_dev.Major = GET_U_1(fhp + 6);
fsidp->fsid_code = 0;
- *inop = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]);
+ *inop = GET_BE_U_4(fhp + 12);
if (osnamep)
*osnamep = "Auspex";
break;
case FHT_BSD44:
- fsidp->Fsid_dev.Minor = fhp[0];
- fsidp->Fsid_dev.Major = fhp[1];
+ fsidp->Fsid_dev.Minor = GET_U_1(fhp);
+ fsidp->Fsid_dev.Major = GET_U_1(fhp + 1);
fsidp->fsid_code = 0;
- *inop = make_uint32(fhp[15], fhp[14], fhp[13], fhp[12]);
+ *inop = GET_LE_U_4(fhp + 12);
if (osnamep)
*osnamep = "BSD 4.4";
break;
case FHT_DECOSF:
- fsidp->fsid_code = make_uint32(fhp[7], fhp[6], fhp[5], fhp[4]);
+ fsidp->fsid_code = GET_LE_U_4(fhp + 4);
/* XXX could ignore 3 high-order bytes */
- temp = make_uint32(fhp[3], fhp[2], fhp[1], fhp[0]);
+ temp = GET_LE_U_4(fhp);
fsidp->Fsid_dev.Minor = temp & 0xFFFFF;
fsidp->Fsid_dev.Major = (temp>>20) & 0xFFF;
- *inop = make_uint32(fhp[15], fhp[14], fhp[13], fhp[12]);
+ *inop = GET_LE_U_4(fhp + 12);
if (osnamep)
*osnamep = "OSF";
break;
case FHT_IRIX4:
- fsidp->Fsid_dev.Minor = fhp[3];
- fsidp->Fsid_dev.Major = fhp[2];
+ fsidp->Fsid_dev.Minor = GET_U_1(fhp + 3);
+ fsidp->Fsid_dev.Major = GET_U_1(fhp + 2);
fsidp->fsid_code = 0;
- *inop = make_uint32(fhp[8], fhp[9], fhp[10], fhp[11]);
+ *inop = GET_BE_U_4(fhp + 8);
if (osnamep)
*osnamep = "IRIX4";
break;
case FHT_IRIX5:
- fsidp->Fsid_dev.Minor = make_uint16(fhp[2], fhp[3]);
- fsidp->Fsid_dev.Major = make_uint16(fhp[0], fhp[1]);
- fsidp->fsid_code = make_uint32(fhp[4], fhp[5], fhp[6], fhp[7]);
+ fsidp->Fsid_dev.Minor = GET_BE_U_2(fhp + 2);
+ fsidp->Fsid_dev.Major = GET_BE_U_2(fhp);
+ fsidp->fsid_code = GET_BE_U_4(fhp + 4);
- *inop = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]);
+ *inop = GET_BE_U_4(fhp + 12);
if (osnamep)
*osnamep = "IRIX5";
#endif
case FHT_SUNOS4:
- fsidp->Fsid_dev.Minor = fhp[3];
- fsidp->Fsid_dev.Major = fhp[2];
- fsidp->fsid_code = make_uint32(fhp[4], fhp[5], fhp[6], fhp[7]);
+ fsidp->Fsid_dev.Minor = GET_U_1(fhp + 3);
+ fsidp->Fsid_dev.Major = GET_U_1(fhp + 2);
+ fsidp->fsid_code = GET_BE_U_4(fhp + 4);
- *inop = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]);
+ *inop = GET_BE_U_4(fhp + 12);
if (osnamep)
*osnamep = "SUNOS4";
break;
case FHT_SUNOS5:
- temp = make_uint16(fhp[0], fhp[1]);
+ temp = GET_BE_U_2(fhp);
fsidp->Fsid_dev.Major = (temp>>2) & 0x3FFF;
- temp = make_uint24(fhp[1], fhp[2], fhp[3]);
+ temp = GET_BE_U_3(fhp + 1);
fsidp->Fsid_dev.Minor = temp & 0x3FFFF;
- fsidp->fsid_code = make_uint32(fhp[4], fhp[5], fhp[6], fhp[7]);
+ fsidp->fsid_code = GET_BE_U_4(fhp + 4);
- *inop = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]);
+ *inop = GET_BE_U_4(fhp + 12);
if (osnamep)
*osnamep = "SUNOS5";
case FHT_ULTRIX:
fsidp->fsid_code = 0;
- fsidp->Fsid_dev.Minor = fhp[0];
- fsidp->Fsid_dev.Major = fhp[1];
+ fsidp->Fsid_dev.Minor = GET_U_1(fhp);
+ fsidp->Fsid_dev.Major = GET_U_1(fhp + 1);
- temp = make_uint32(fhp[7], fhp[6], fhp[5], fhp[4]);
+ temp = GET_LE_U_4(fhp + 4);
*inop = temp;
if (osnamep)
*osnamep = "Ultrix";
if (sizeof(*fsidp) > 14)
memset((char *)fsidp, 0, sizeof(*fsidp));
/* just use the whole thing */
- memcpy((char *)fsidp, (char *)fh, 14);
+ memcpy((char *)fsidp, (const char *)fh, 14);
}
else {
- u_int32_t tempa[4]; /* at least 16 bytes, maybe more */
+ uint32_t tempa[4]; /* at least 16 bytes, maybe more */
memset((char *)tempa, 0, sizeof(tempa));
- memcpy((char *)tempa, (char *)fh, 14); /* ensure alignment */
+ memcpy((char *)tempa, (const char *)fh, 14); /* ensure alignment */
fsidp->Fsid_dev.Minor = tempa[0] + (tempa[1]<<1);
fsidp->Fsid_dev.Major = tempa[2] + (tempa[3]<<1);
fsidp->fsid_code = 0;
}
/* VMS file ID is: (RVN, FidHi, FidLo) */
- *inop = make_uint32(fhp[26], fhp[27], fhp[23], fhp[22]);
+ *inop = (((uint32_t) GET_U_1(fhp + 26)) << 24) |
+ (((uint32_t) GET_U_1(fhp + 27)) << 16) |
+ (GET_LE_U_2(fhp + 22) << 0);
/* Caller must save (and null-terminate?) this value */
if (fsnamep)
- *fsnamep = (char *)&(fhp[1]);
+ *fsnamep = (const char *)(fhp + 1);
if (osnamep)
*osnamep = "VMS";
break;
case FHT_AIX32:
- fsidp->Fsid_dev.Minor = make_uint16(fhp[2], fhp[3]);
- fsidp->Fsid_dev.Major = make_uint16(fhp[0], fhp[1]);
- fsidp->fsid_code = make_uint32(fhp[4], fhp[5], fhp[6], fhp[7]);
+ fsidp->Fsid_dev.Minor = GET_BE_U_2(fhp + 2);
+ fsidp->Fsid_dev.Major = GET_BE_U_2(fhp);
+ fsidp->fsid_code = GET_BE_U_4(fhp + 4);
- *inop = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]);
+ *inop = GET_BE_U_4(fhp + 12);
if (osnamep)
*osnamep = "AIX32";
break;
case FHT_HPUX9:
- fsidp->Fsid_dev.Major = fhp[0];
- temp = make_uint24(fhp[1], fhp[2], fhp[3]);
+ fsidp->Fsid_dev.Major = GET_U_1(fhp);
+ temp = GET_BE_U_3(fhp + 1);
fsidp->Fsid_dev.Minor = temp;
- fsidp->fsid_code = make_uint32(fhp[4], fhp[5], fhp[6], fhp[7]);
+ fsidp->fsid_code = GET_BE_U_4(fhp + 4);
- *inop = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]);
+ *inop = GET_BE_U_4(fhp + 12);
if (osnamep)
*osnamep = "HPUX9";
case FHT_UNKNOWN:
#ifdef DEBUG
/* XXX debugging */
- for (i = 0; i < 32; i++)
- (void)fprintf(stderr, "%x.", fhp[i]);
+ for (i = 0; i < len*4; i++)
+ (void)fprintf(stderr, "%x.", GET_U_1(fhp + i));
(void)fprintf(stderr, "\n");
#endif
/* Save the actual handle, so it can be display with -u */
- for (i = 0; i < 32; i++)
- (void)snprintf(&(fsidp->Opaque_Handle[i*2]), 3, "%.2X", fhp[i]);
+ for (i = 0; i < len*4 && i*2 < sizeof(fsidp->Opaque_Handle) - 1; i++)
+ (void)snprintf(&(fsidp->Opaque_Handle[i*2]), 3, "%.2X",
+ GET_U_1(fhp + i));
+ fsidp->Opaque_Handle[i*2] = '\0';
/* XXX for now, give "bogus" values to aid debugging */
fsidp->fsid_code = 0;
* (3) followed by string of nulls
*/
static int
-is_UCX(fhp)
-const unsigned char *fhp;
+is_UCX(netdissect_options *ndo, const unsigned char *fhp, u_int len)
{
- register int i;
+ u_int i;
int seen_null = 0;
+ /*
+ * Require at least 28 bytes of file handle; it's variable-length
+ * in NFSv3. "len" is in units of 32-bit words, not bytes.
+ */
+ if (len < 28/4)
+ return(0);
+
for (i = 1; i < 14; i++) {
- if (isprint(fhp[i])) {
+ if (ND_ASCII_ISPRINT(GET_U_1(fhp + i))) {
if (seen_null)
return(0);
else
continue;
}
- else if (fhp[i] == 0) {
+ else if (GET_U_1(fhp + i) == 0) {
seen_null = 1;
continue;
}
projects / tcpdump / blobdiff