Adding upstream version 4.99.4.upstream/4.99.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 462 insertions, 0 deletions

diff --git a/parsenfsfh.c b/parsenfsfh.c
new file mode 100644
index 0000000..cd94369
--- /dev/null
+++ b/parsenfsfh.c
@@ -0,0 +1,462 @@
+/*
+ * Copyright (c) 1993, 1994 Jeffrey C. Mogul, Digital Equipment Corporation,
+ * Western Research Laboratory. All rights reserved.
+ * Copyright (c) 2001 Compaq Computer Corporation. All rights reserved.
+ *
+ *  Permission to use, copy, and modify this software and its
+ *  documentation is hereby granted only under the following terms and
+ *  conditions.  Both the above copyright notice and this permission
+ *  notice must appear in all copies of the software, derivative works
+ *  or modified versions, and any portions thereof, and both notices
+ *  must appear in supporting documentation.
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *    1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *    2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND COMPAQ COMPUTER CORPORATION
+ *  DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ *  ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.   IN NO
+ *  EVENT SHALL COMPAQ COMPUTER CORPORATION BE LIABLE FOR ANY
+ *  SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ *  AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ *  OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ *  SOFTWARE.
+ */
+
+/*
+ * parsenfsfh.c - portable parser for NFS file handles
+ *			uses all sorts of heuristics
+ *
+ * Jeffrey C. Mogul
+ * Digital Equipment Corporation
+ * Western Research Laboratory
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "netdissect-stdinc.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#include "netdissect-ctype.h"
+
+#include "netdissect.h"
+#include "extract.h"
+#include "nfsfh.h"
+
+/*
+ * This routine attempts to parse a file handle (in network byte order),
+ * using heuristics to guess what kind of format it is in.  See the
+ * file "fhandle_layouts" for a detailed description of the various
+ * patterns we know about.
+ *
+ * The file handle is parsed into our internal representation of a
+ * file-system id, and an internal representation of an inode-number.
+ */
+
+#define	FHT_UNKNOWN	0
+#define	FHT_AUSPEX	1
+#define	FHT_DECOSF	2
+#define	FHT_IRIX4	3
+#define	FHT_IRIX5	4
+#define	FHT_SUNOS3	5
+#define	FHT_SUNOS4	6
+#define	FHT_ULTRIX	7
+#define	FHT_VMSUCX	8
+#define	FHT_SUNOS5	9
+#define	FHT_AIX32	10
+#define	FHT_HPUX9	11
+#define	FHT_BSD44	12
+
+static int is_UCX(netdissect_options *, const unsigned char *, u_int);
+
+void
+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 */
+{
+	const unsigned char *fhp = fh;
+	uint32_t temp;
+	int fhtype = FHT_UNKNOWN;
+	u_int i;
+
+	/*
+	 * 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;
+#endif
+#if	defined(IRIX50)
+		    fhtype = FHT_IRIX5;
+#endif
+#if	defined(IRIX51)
+		    fhtype = FHT_IRIX5;
+#endif
+#if	defined(SUNOS4)
+		    fhtype = FHT_SUNOS4;
+#endif
+#if	defined(SUNOS5)
+		    fhtype = FHT_SUNOS5;
+#endif
+#if	defined(ultrix)
+		    fhtype = FHT_ULTRIX;
+#endif
+#if	defined(__osf__)
+		    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 ((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 {
+			/*
+			 * bytes[2,3] != (0,0); rules out Auspex, could be
+			 * DECOSF, SUNOS4, or IRIX4
+			 */
+			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 {
+		    /*
+		     * 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 {
+			/*
+			 * 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 = GET_U_1(fhp + 7);
+	    fsidp->Fsid_dev.Major = GET_U_1(fhp + 6);
+	    fsidp->fsid_code = 0;
+
+	    *inop = GET_BE_U_4(fhp + 12);
+
+	    if (osnamep)
+		*osnamep = "Auspex";
+	    break;
+
+	case FHT_BSD44:
+	    fsidp->Fsid_dev.Minor = GET_U_1(fhp);
+	    fsidp->Fsid_dev.Major = GET_U_1(fhp + 1);
+	    fsidp->fsid_code = 0;
+
+	    *inop = GET_LE_U_4(fhp + 12);
+
+	    if (osnamep)
+		*osnamep = "BSD 4.4";
+	    break;
+
+	case FHT_DECOSF:
+	    fsidp->fsid_code = GET_LE_U_4(fhp + 4);
+			/* XXX could ignore 3 high-order bytes */
+
+	    temp = GET_LE_U_4(fhp);
+	    fsidp->Fsid_dev.Minor = temp & 0xFFFFF;
+	    fsidp->Fsid_dev.Major = (temp>>20) & 0xFFF;
+
+	    *inop = GET_LE_U_4(fhp + 12);
+	    if (osnamep)
+		*osnamep = "OSF";
+	    break;
+
+	case FHT_IRIX4:
+	    fsidp->Fsid_dev.Minor = GET_U_1(fhp + 3);
+	    fsidp->Fsid_dev.Major = GET_U_1(fhp + 2);
+	    fsidp->fsid_code = 0;
+
+	    *inop = GET_BE_U_4(fhp + 8);
+
+	    if (osnamep)
+		*osnamep = "IRIX4";
+	    break;
+
+	case FHT_IRIX5:
+	    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 = GET_BE_U_4(fhp + 12);
+
+	    if (osnamep)
+		*osnamep = "IRIX5";
+	    break;
+
+#ifdef notdef
+	case FHT_SUNOS3:
+	    /*
+	     * XXX - none of the heuristics above return this.
+	     * Are there any SunOS 3.x systems around to care about?
+	     */
+	    if (osnamep)
+		*osnamep = "SUNOS3";
+	    break;
+#endif
+
+	case FHT_SUNOS4:
+	    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 = GET_BE_U_4(fhp + 12);
+
+	    if (osnamep)
+		*osnamep = "SUNOS4";
+	    break;
+
+	case FHT_SUNOS5:
+	    temp = GET_BE_U_2(fhp);
+	    fsidp->Fsid_dev.Major = (temp>>2) &  0x3FFF;
+	    temp = GET_BE_U_3(fhp + 1);
+	    fsidp->Fsid_dev.Minor = temp & 0x3FFFF;
+	    fsidp->fsid_code = GET_BE_U_4(fhp + 4);
+
+	    *inop = GET_BE_U_4(fhp + 12);
+
+	    if (osnamep)
+		*osnamep = "SUNOS5";
+	    break;
+
+	case FHT_ULTRIX:
+	    fsidp->fsid_code = 0;
+	    fsidp->Fsid_dev.Minor = GET_U_1(fhp);
+	    fsidp->Fsid_dev.Major = GET_U_1(fhp + 1);
+
+	    temp = GET_LE_U_4(fhp + 4);
+	    *inop = temp;
+	    if (osnamep)
+		*osnamep = "Ultrix";
+	    break;
+
+	case FHT_VMSUCX:
+	    /* No numeric file system ID, so hash on the device-name */
+	    if (sizeof(*fsidp) >= 14) {
+		if (sizeof(*fsidp) > 14)
+		    memset((char *)fsidp, 0, sizeof(*fsidp));
+		/* just use the whole thing */
+		memcpy((char *)fsidp, (const char *)fh, 14);
+	    }
+	    else {
+		uint32_t tempa[4];	/* at least 16 bytes, maybe more */
+
+		memset((char *)tempa, 0, sizeof(tempa));
+		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 = (((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 = (const char *)(fhp + 1);
+
+	    if (osnamep)
+		*osnamep = "VMS";
+	    break;
+
+	case FHT_AIX32:
+	    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 = GET_BE_U_4(fhp + 12);
+
+	    if (osnamep)
+		*osnamep = "AIX32";
+	    break;
+
+	case FHT_HPUX9:
+	    fsidp->Fsid_dev.Major = GET_U_1(fhp);
+	    temp = GET_BE_U_3(fhp + 1);
+	    fsidp->Fsid_dev.Minor = temp;
+	    fsidp->fsid_code = GET_BE_U_4(fhp + 4);
+
+	    *inop = GET_BE_U_4(fhp + 12);
+
+	    if (osnamep)
+		*osnamep = "HPUX9";
+	    break;
+
+	case FHT_UNKNOWN:
+#ifdef DEBUG
+	    /* XXX debugging */
+	    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 < 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;
+	    fsidp->Fsid_dev.Minor = 257;
+	    fsidp->Fsid_dev.Major = 257;
+	    *inop = 1;
+
+	    /* display will show this string instead of (257,257) */
+	    if (fsnamep)
+		*fsnamep = "Unknown";
+
+	    if (osnamep)
+		*osnamep = "Unknown";
+	    break;
+
+	}
+}
+
+/*
+ * Is this a VMS UCX file handle?
+ *	Check for:
+ *	(1) leading code byte	[XXX not yet]
+ *	(2) followed by string of printing chars & spaces
+ *	(3) followed by string of nulls
+ */
+static int
+is_UCX(netdissect_options *ndo, const unsigned char *fhp, u_int len)
+{
+	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 (ND_ASCII_ISPRINT(GET_U_1(fhp + i))) {
+		if (seen_null)
+		   return(0);
+		else
+		   continue;
+	    }
+	    else if (GET_U_1(fhp + i) == 0) {
+		seen_null = 1;
+		continue;
+	    }
+	    else
+		return(0);
+	}
+
+	return(1);
+}