((lsb) + ((e)<<8) + ((d)<<16) + ((c)<<24))
#endif
-static int is_UCX(const unsigned char *);
+static int is_UCX(const unsigned char *, u_int);
void
-Parse_fh(register const unsigned char *fh, int len _U_, my_fsid *fsidp,
+Parse_fh(register const unsigned char *fh, 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 fhtype = FHT_UNKNOWN;
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 ((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 {
/*
- * 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 ((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 {
- 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 ((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;
+ }
+ /*XXX we probably only need to test of these two bytes */
+ else if ((len >= 24/4) && (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 {
- fhtype = FHT_UNKNOWN;
+ /*
+ * bytes[2,3] != (0,0); rules out Ultrix, could be
+ * DECOSF, SUNOS5, IRIX5, AIX, HP-UX, or UCX
+ */
+ 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 {
+ /*
+ * 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(fhp, len)) {
+ fhtype = FHT_VMSUCX;
+ }
+ else {
+ fhtype = FHT_UNKNOWN;
+ }
+ }
}
}
- }
}
/* XXX still needs to handle SUNOS3 */
case FHT_UNKNOWN:
#ifdef DEBUG
/* XXX debugging */
- for (i = 0; i < 32; i++)
+ for (i = 0; i < len*4; i++)
(void)fprintf(stderr, "%x.", fhp[i]);
(void)fprintf(stderr, "\n");
#endif
/* Save the actual handle, so it can be display with -u */
- for (i = 0; i < 32; i++)
+ for (i = 0; i < len*4; i++)
(void)snprintf(&(fsidp->Opaque_Handle[i*2]), 3, "%.2X", fhp[i]);
/* XXX for now, give "bogus" values to aid debugging */
* (3) followed by string of nulls
*/
static int
-is_UCX(const unsigned char *fhp)
+is_UCX(const unsigned char *fhp, u_int len)
{
register 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 (ND_ISPRINT(fhp[i])) {
if (seen_null)
projects / tcpdump / commitdiff
