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Diffstat (limited to 'contrib/tcpdump/parsenfsfh.c')
| -rw-r--r-- | contrib/tcpdump/parsenfsfh.c | 486 |
1 files changed, 486 insertions, 0 deletions
diff --git a/contrib/tcpdump/parsenfsfh.c b/contrib/tcpdump/parsenfsfh.c new file mode 100644 index 0000000..bf575e0 --- /dev/null +++ b/contrib/tcpdump/parsenfsfh.c @@ -0,0 +1,486 @@ +/* + * 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 + * + * $FreeBSD$ + */ + +#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" +#endif + +#include <tcpdump-stdinc.h> + +#include <stdio.h> +#include <string.h> + +#include "interface.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 + +#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 *); + +void +Parse_fh(fh, len, fsidp, inop, osnamep, fsnamep, ourself) +register const unsigned char *fh; +int len _U_; +my_fsid *fsidp; +ino_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; + int fhtype = FHT_UNKNOWN; + int i; + + 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 ((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; + } + /*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 + */ + 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)) { + 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_code = 0; + + temp = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]); + *inop = temp; + + if (osnamep) + *osnamep = "Auspex"; + break; + + case FHT_BSD44: + fsidp->Fsid_dev.Minor = fhp[0]; + fsidp->Fsid_dev.Major = fhp[1]; + fsidp->fsid_code = 0; + + temp = make_uint32(fhp[15], fhp[14], fhp[13], fhp[12]); + *inop = temp; + + if (osnamep) + *osnamep = "BSD 4.4"; + break; + + case FHT_DECOSF: + fsidp->fsid_code = make_uint32(fhp[7], fhp[6], fhp[5], fhp[4]); + /* XXX could ignore 3 high-order bytes */ + + temp = make_uint32(fhp[3], fhp[2], fhp[1], fhp[0]); + fsidp->Fsid_dev.Minor = temp & 0xFFFFF; + fsidp->Fsid_dev.Major = (temp>>20) & 0xFFF; + + temp = make_uint32(fhp[15], fhp[14], fhp[13], fhp[12]); + *inop = temp; + if (osnamep) + *osnamep = "OSF"; + break; + + case FHT_IRIX4: + fsidp->Fsid_dev.Minor = fhp[3]; + fsidp->Fsid_dev.Major = fhp[2]; + fsidp->fsid_code = 0; + + temp = make_uint32(fhp[8], fhp[9], fhp[10], fhp[11]); + *inop = temp; + + 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]); + + temp = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]); + *inop = temp; + + 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 = fhp[3]; + fsidp->Fsid_dev.Major = fhp[2]; + fsidp->fsid_code = make_uint32(fhp[4], fhp[5], fhp[6], fhp[7]); + + temp = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]); + *inop = temp; + + if (osnamep) + *osnamep = "SUNOS4"; + break; + + case FHT_SUNOS5: + temp = make_uint16(fhp[0], fhp[1]); + fsidp->Fsid_dev.Major = (temp>>2) & 0x3FFF; + temp = make_uint24(fhp[1], fhp[2], fhp[3]); + fsidp->Fsid_dev.Minor = temp & 0x3FFFF; + fsidp->fsid_code = make_uint32(fhp[4], fhp[5], fhp[6], fhp[7]); + + temp = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]); + *inop = temp; + + if (osnamep) + *osnamep = "SUNOS5"; + break; + + case FHT_ULTRIX: + fsidp->fsid_code = 0; + fsidp->Fsid_dev.Minor = fhp[0]; + fsidp->Fsid_dev.Major = fhp[1]; + + temp = make_uint32(fhp[7], fhp[6], fhp[5], 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, (char *)fh, 14); + } + else { + u_int32_t tempa[4]; /* at least 16 bytes, maybe more */ + + memset((char *)tempa, 0, sizeof(tempa)); + memcpy((char *)tempa, (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]); + + /* Caller must save (and null-terminate?) this value */ + if (fsnamep) + *fsnamep = (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]); + + temp = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]); + *inop = temp; + + 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.Minor = temp; + fsidp->fsid_code = make_uint32(fhp[4], fhp[5], fhp[6], fhp[7]); + + temp = make_uint32(fhp[12], fhp[13], fhp[14], fhp[15]); + *inop = temp; + + if (osnamep) + *osnamep = "HPUX9"; + break; + + case FHT_UNKNOWN: +#ifdef DEBUG + /* XXX debugging */ + for (i = 0; i < 32; 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++) + (void)snprintf(&(fsidp->Opaque_Handle[i*2]), 3, "%.2X", fhp[i]); + + /* 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(fhp) +const unsigned char *fhp; +{ + register int i; + int seen_null = 0; + + for (i = 1; i < 14; i++) { + if (isprint(fhp[i])) { + if (seen_null) + return(0); + else + continue; + } + else if (fhp[i] == 0) { + seen_null = 1; + continue; + } + else + return(0); + } + + return(1); +} |
