diff options
Diffstat (limited to 'contrib/tcpdump/parsenfsfh.c')
-rw-r--r-- | contrib/tcpdump/parsenfsfh.c | 243 |
1 files changed, 128 insertions, 115 deletions
diff --git a/contrib/tcpdump/parsenfsfh.c b/contrib/tcpdump/parsenfsfh.c index 909a180..8f48e77 100644 --- a/contrib/tcpdump/parsenfsfh.c +++ b/contrib/tcpdump/parsenfsfh.c @@ -38,21 +38,18 @@ * Jeffrey C. Mogul * Digital Equipment Corporation * Western Research Laboratory - * - * $FreeBSD$ */ -#define NETDISSECT_REWORKED #ifdef HAVE_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.h" #include "nfsfh.h" /* @@ -105,10 +102,10 @@ ((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, 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) */ @@ -117,138 +114,146 @@ Parse_fh(register const unsigned char *fh, int len _U_, my_fsid *fsidp, register 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 ((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 */ @@ -363,13 +368,13 @@ Parse_fh(register const unsigned char *fh, int len _U_, my_fsid *fsidp, 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 { 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; @@ -380,7 +385,7 @@ Parse_fh(register const unsigned char *fh, int len _U_, my_fsid *fsidp, /* Caller must save (and null-terminate?) this value */ if (fsnamep) - *fsnamep = (char *)&(fhp[1]); + *fsnamep = (const char *)&(fhp[1]); if (osnamep) *osnamep = "VMS"; @@ -412,13 +417,14 @@ Parse_fh(register const unsigned char *fh, int len _U_, my_fsid *fsidp, 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*2 < sizeof(fsidp->Opaque_Handle) - 1; i++) (void)snprintf(&(fsidp->Opaque_Handle[i*2]), 3, "%.2X", fhp[i]); + fsidp->Opaque_Handle[i*2] = '\0'; /* XXX for now, give "bogus" values to aid debugging */ fsidp->fsid_code = 0; @@ -445,11 +451,18 @@ Parse_fh(register const unsigned char *fh, int len _U_, my_fsid *fsidp, * (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; + register 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_ISPRINT(fhp[i])) { if (seen_null) |