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tcpdump/print-nfs.c
Francois-Xavier Le Bail 21b12733b6 Remove 15 now redundant ND_TCHECK_n() calls 
ND_TCHECK_n(e).

They are redundant because they are followed by a GET_.*_n(e) call,
same n, same e, which do the bounds check.

Remove unused 'trunc' label(s) and most associated code(s).
2020-09-10 14:06:40 +02:00

1851 lines
45 KiB
C
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/*
* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
/* \summary: Network File System (NFS) printer */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "netdissect-stdinc.h"
#include <stdio.h>
#include <string.h>
#include <limits.h>
#include "netdissect.h"
#include "addrtoname.h"
#include "extract.h"
#include "nfs.h"
#include "nfsfh.h"
#include "ip.h"
#include "ip6.h"
#include "rpc_auth.h"
#include "rpc_msg.h"
static void nfs_printfh(netdissect_options *, const uint32_t *, const u_int);
static int xid_map_enter(netdissect_options *, const struct sunrpc_msg *, const u_char *);
static int xid_map_find(netdissect_options *, const struct sunrpc_msg *, const u_char *, uint32_t *, uint32_t *);
static void interp_reply(netdissect_options *, const struct sunrpc_msg *, uint32_t, uint32_t, int);
static const uint32_t *parse_post_op_attr(netdissect_options *, const uint32_t *, int);
/*
* Mapping of old NFS Version 2 RPC numbers to generic numbers.
*/
static uint32_t nfsv3_procid[NFS_NPROCS] = {
NFSPROC_NULL,
NFSPROC_GETATTR,
NFSPROC_SETATTR,
NFSPROC_NOOP,
NFSPROC_LOOKUP,
NFSPROC_READLINK,
NFSPROC_READ,
NFSPROC_NOOP,
NFSPROC_WRITE,
NFSPROC_CREATE,
NFSPROC_REMOVE,
NFSPROC_RENAME,
NFSPROC_LINK,
NFSPROC_SYMLINK,
NFSPROC_MKDIR,
NFSPROC_RMDIR,
NFSPROC_READDIR,
NFSPROC_FSSTAT,
NFSPROC_NOOP,
NFSPROC_NOOP,
NFSPROC_NOOP,
NFSPROC_NOOP,
NFSPROC_NOOP,
NFSPROC_NOOP,
NFSPROC_NOOP,
NFSPROC_NOOP
};
static const struct tok nfsproc_str[] = {
{ NFSPROC_NOOP, "nop" },
{ NFSPROC_NULL, "null" },
{ NFSPROC_GETATTR, "getattr" },
{ NFSPROC_SETATTR, "setattr" },
{ NFSPROC_LOOKUP, "lookup" },
{ NFSPROC_ACCESS, "access" },
{ NFSPROC_READLINK, "readlink" },
{ NFSPROC_READ, "read" },
{ NFSPROC_WRITE, "write" },
{ NFSPROC_CREATE, "create" },
{ NFSPROC_MKDIR, "mkdir" },
{ NFSPROC_SYMLINK, "symlink" },
{ NFSPROC_MKNOD, "mknod" },
{ NFSPROC_REMOVE, "remove" },
{ NFSPROC_RMDIR, "rmdir" },
{ NFSPROC_RENAME, "rename" },
{ NFSPROC_LINK, "link" },
{ NFSPROC_READDIR, "readdir" },
{ NFSPROC_READDIRPLUS, "readdirplus" },
{ NFSPROC_FSSTAT, "fsstat" },
{ NFSPROC_FSINFO, "fsinfo" },
{ NFSPROC_PATHCONF, "pathconf" },
{ NFSPROC_COMMIT, "commit" },
{ 0, NULL }
};
/*
* NFS V2 and V3 status values.
*
* Some of these come from the RFCs for NFS V2 and V3, with the message
* strings taken from the FreeBSD C library "errlst.c".
*
* Others are errors that are not in the RFC but that I suspect some
* NFS servers could return; the values are FreeBSD errno values, as
* the first NFS server was the SunOS 2.0 one, and until 5.0 SunOS
* was primarily BSD-derived.
*/
static const struct tok status2str[] = {
{ 1, "Operation not permitted" }, /* EPERM */
{ 2, "No such file or directory" }, /* ENOENT */
{ 5, "Input/output error" }, /* EIO */
{ 6, "Device not configured" }, /* ENXIO */
{ 11, "Resource deadlock avoided" }, /* EDEADLK */
{ 12, "Cannot allocate memory" }, /* ENOMEM */
{ 13, "Permission denied" }, /* EACCES */
{ 17, "File exists" }, /* EEXIST */
{ 18, "Cross-device link" }, /* EXDEV */
{ 19, "Operation not supported by device" }, /* ENODEV */
{ 20, "Not a directory" }, /* ENOTDIR */
{ 21, "Is a directory" }, /* EISDIR */
{ 22, "Invalid argument" }, /* EINVAL */
{ 26, "Text file busy" }, /* ETXTBSY */
{ 27, "File too large" }, /* EFBIG */
{ 28, "No space left on device" }, /* ENOSPC */
{ 30, "Read-only file system" }, /* EROFS */
{ 31, "Too many links" }, /* EMLINK */
{ 45, "Operation not supported" }, /* EOPNOTSUPP */
{ 62, "Too many levels of symbolic links" }, /* ELOOP */
{ 63, "File name too long" }, /* ENAMETOOLONG */
{ 66, "Directory not empty" }, /* ENOTEMPTY */
{ 69, "Disc quota exceeded" }, /* EDQUOT */
{ 70, "Stale NFS file handle" }, /* ESTALE */
{ 71, "Too many levels of remote in path" }, /* EREMOTE */
{ 99, "Write cache flushed to disk" }, /* NFSERR_WFLUSH (not used) */
{ 10001, "Illegal NFS file handle" }, /* NFS3ERR_BADHANDLE */
{ 10002, "Update synchronization mismatch" }, /* NFS3ERR_NOT_SYNC */
{ 10003, "READDIR/READDIRPLUS cookie is stale" }, /* NFS3ERR_BAD_COOKIE */
{ 10004, "Operation not supported" }, /* NFS3ERR_NOTSUPP */
{ 10005, "Buffer or request is too small" }, /* NFS3ERR_TOOSMALL */
{ 10006, "Unspecified error on server" }, /* NFS3ERR_SERVERFAULT */
{ 10007, "Object of that type not supported" }, /* NFS3ERR_BADTYPE */
{ 10008, "Request couldn't be completed in time" }, /* NFS3ERR_JUKEBOX */
{ 0, NULL }
};
static const struct tok nfsv3_writemodes[] = {
{ 0, "unstable" },
{ 1, "datasync" },
{ 2, "filesync" },
{ 0, NULL }
};
static const struct tok type2str[] = {
{ NFNON, "NON" },
{ NFREG, "REG" },
{ NFDIR, "DIR" },
{ NFBLK, "BLK" },
{ NFCHR, "CHR" },
{ NFLNK, "LNK" },
{ NFFIFO, "FIFO" },
{ 0, NULL }
};
static const struct tok sunrpc_auth_str[] = {
{ SUNRPC_AUTH_OK, "OK" },
{ SUNRPC_AUTH_BADCRED, "Bogus Credentials (seal broken)" },
{ SUNRPC_AUTH_REJECTEDCRED, "Rejected Credentials (client should begin new session)" },
{ SUNRPC_AUTH_BADVERF, "Bogus Verifier (seal broken)" },
{ SUNRPC_AUTH_REJECTEDVERF, "Verifier expired or was replayed" },
{ SUNRPC_AUTH_TOOWEAK, "Credentials are too weak" },
{ SUNRPC_AUTH_INVALIDRESP, "Bogus response verifier" },
{ SUNRPC_AUTH_FAILED, "Unknown failure" },
{ 0, NULL }
};
static const struct tok sunrpc_str[] = {
{ SUNRPC_PROG_UNAVAIL, "PROG_UNAVAIL" },
{ SUNRPC_PROG_MISMATCH, "PROG_MISMATCH" },
{ SUNRPC_PROC_UNAVAIL, "PROC_UNAVAIL" },
{ SUNRPC_GARBAGE_ARGS, "GARBAGE_ARGS" },
{ SUNRPC_SYSTEM_ERR, "SYSTEM_ERR" },
{ 0, NULL }
};
static void
print_nfsaddr(netdissect_options *ndo,
const u_char *bp, const char *s, const char *d)
{
const struct ip *ip;
const struct ip6_hdr *ip6;
char srcaddr[INET6_ADDRSTRLEN], dstaddr[INET6_ADDRSTRLEN];
srcaddr[0] = dstaddr[0] = '\0';
switch (IP_V((const struct ip *)bp)) {
case 4:
ip = (const struct ip *)bp;
strlcpy(srcaddr, GET_IPADDR_STRING(ip->ip_src), sizeof(srcaddr));
strlcpy(dstaddr, GET_IPADDR_STRING(ip->ip_dst), sizeof(dstaddr));
break;
case 6:
ip6 = (const struct ip6_hdr *)bp;
strlcpy(srcaddr, GET_IP6ADDR_STRING(ip6->ip6_src),
sizeof(srcaddr));
strlcpy(dstaddr, GET_IP6ADDR_STRING(ip6->ip6_dst),
sizeof(dstaddr));
break;
default:
strlcpy(srcaddr, "?", sizeof(srcaddr));
strlcpy(dstaddr, "?", sizeof(dstaddr));
break;
}
ND_PRINT("%s.%s > %s.%s: ", srcaddr, s, dstaddr, d);
}
/*
* NFS Version 3 sattr3 structure for the new node creation case.
* This does not have a fixed layout on the network, so this
* structure does not correspond to the layout of the data on
* the network; it's used to store the data when the sattr3
* is parsed for use when it's later printed.
*/
struct nfsv3_sattr {
uint32_t sa_modeset;
uint32_t sa_mode;
uint32_t sa_uidset;
uint32_t sa_uid;
uint32_t sa_gidset;
uint32_t sa_gid;
uint32_t sa_sizeset;
uint32_t sa_size;
uint32_t sa_atimetype;
struct {
uint32_t nfsv3_sec;
uint32_t nfsv3_nsec;
} sa_atime;
uint32_t sa_mtimetype;
struct {
uint32_t nfsv3_sec;
uint32_t nfsv3_nsec;
} sa_mtime;
};
static const uint32_t *
parse_sattr3(netdissect_options *ndo,
const uint32_t *dp, struct nfsv3_sattr *sa3)
{
sa3->sa_modeset = GET_BE_U_4(dp);
dp++;
if (sa3->sa_modeset) {
sa3->sa_mode = GET_BE_U_4(dp);
dp++;
}
sa3->sa_uidset = GET_BE_U_4(dp);
dp++;
if (sa3->sa_uidset) {
sa3->sa_uid = GET_BE_U_4(dp);
dp++;
}
sa3->sa_gidset = GET_BE_U_4(dp);
dp++;
if (sa3->sa_gidset) {
sa3->sa_gid = GET_BE_U_4(dp);
dp++;
}
sa3->sa_sizeset = GET_BE_U_4(dp);
dp++;
if (sa3->sa_sizeset) {
sa3->sa_size = GET_BE_U_4(dp);
dp++;
}
sa3->sa_atimetype = GET_BE_U_4(dp);
dp++;
if (sa3->sa_atimetype == NFSV3SATTRTIME_TOCLIENT) {
sa3->sa_atime.nfsv3_sec = GET_BE_U_4(dp);
dp++;
sa3->sa_atime.nfsv3_nsec = GET_BE_U_4(dp);
dp++;
}
sa3->sa_mtimetype = GET_BE_U_4(dp);
dp++;
if (sa3->sa_mtimetype == NFSV3SATTRTIME_TOCLIENT) {
sa3->sa_mtime.nfsv3_sec = GET_BE_U_4(dp);
dp++;
sa3->sa_mtime.nfsv3_nsec = GET_BE_U_4(dp);
dp++;
}
return dp;
}
static void
print_sattr3(netdissect_options *ndo,
const struct nfsv3_sattr *sa3, int verbose)
{
if (sa3->sa_modeset)
ND_PRINT(" mode %o", sa3->sa_mode);
if (sa3->sa_uidset)
ND_PRINT(" uid %u", sa3->sa_uid);
if (sa3->sa_gidset)
ND_PRINT(" gid %u", sa3->sa_gid);
if (verbose > 1) {
if (sa3->sa_atimetype == NFSV3SATTRTIME_TOCLIENT)
ND_PRINT(" atime %u.%06u", sa3->sa_atime.nfsv3_sec,
sa3->sa_atime.nfsv3_nsec);
if (sa3->sa_mtimetype == NFSV3SATTRTIME_TOCLIENT)
ND_PRINT(" mtime %u.%06u", sa3->sa_mtime.nfsv3_sec,
sa3->sa_mtime.nfsv3_nsec);
}
}
void
nfsreply_print(netdissect_options *ndo,
const u_char *bp, u_int length,
const u_char *bp2)
{
const struct sunrpc_msg *rp;
char srcid[20], dstid[20]; /*fits 32bit*/
ndo->ndo_protocol = "nfs";
rp = (const struct sunrpc_msg *)bp;
if (!ndo->ndo_nflag) {
strlcpy(srcid, "nfs", sizeof(srcid));
snprintf(dstid, sizeof(dstid), "%u",
GET_BE_U_4(rp->rm_xid));
} else {
snprintf(srcid, sizeof(srcid), "%u", NFS_PORT);
snprintf(dstid, sizeof(dstid), "%u",
GET_BE_U_4(rp->rm_xid));
}
print_nfsaddr(ndo, bp2, srcid, dstid);
nfsreply_noaddr_print(ndo, bp, length, bp2);
}
void
nfsreply_noaddr_print(netdissect_options *ndo,
const u_char *bp, u_int length,
const u_char *bp2)
{
const struct sunrpc_msg *rp;
uint32_t proc, vers, reply_stat;
enum sunrpc_reject_stat rstat;
uint32_t rlow;
uint32_t rhigh;
enum sunrpc_auth_stat rwhy;
ndo->ndo_protocol = "nfs";
rp = (const struct sunrpc_msg *)bp;
ND_TCHECK_4(rp->rm_reply.rp_stat);
reply_stat = GET_BE_U_4(&rp->rm_reply.rp_stat);
switch (reply_stat) {
case SUNRPC_MSG_ACCEPTED:
ND_PRINT("reply ok %u", length);
if (xid_map_find(ndo, rp, bp2, &proc, &vers) >= 0)
interp_reply(ndo, rp, proc, vers, length);
break;
case SUNRPC_MSG_DENIED:
ND_PRINT("reply ERR %u: ", length);
ND_TCHECK_4(rp->rm_reply.rp_reject.rj_stat);
rstat = GET_BE_U_4(&rp->rm_reply.rp_reject.rj_stat);
switch (rstat) {
case SUNRPC_RPC_MISMATCH:
ND_TCHECK_4(rp->rm_reply.rp_reject.rj_vers.high);
rlow = GET_BE_U_4(&rp->rm_reply.rp_reject.rj_vers.low);
rhigh = GET_BE_U_4(&rp->rm_reply.rp_reject.rj_vers.high);
ND_PRINT("RPC Version mismatch (%u-%u)", rlow, rhigh);
break;
case SUNRPC_AUTH_ERROR:
ND_TCHECK_4(rp->rm_reply.rp_reject.rj_why);
rwhy = GET_BE_U_4(&rp->rm_reply.rp_reject.rj_why);
ND_PRINT("Auth %s", tok2str(sunrpc_auth_str, "Invalid failure code %u", rwhy));
break;
default:
ND_PRINT("Unknown reason for rejecting rpc message %u", (unsigned int)rstat);
break;
}
break;
default:
ND_PRINT("reply Unknown rpc response code=%u %u", reply_stat, length);
break;
}
return;
trunc:
nd_print_trunc(ndo);
}
/*
* Return a pointer to the first file handle in the packet.
* If the packet was truncated, return 0.
*/
static const uint32_t *
parsereq(netdissect_options *ndo,
const struct sunrpc_msg *rp, u_int length)
{
const uint32_t *dp;
u_int len, rounded_len;
/*
* Find the start of the req data (if we captured it).
* First, get the length of the credentials, and make sure
* we have all of the opaque part of the credentials.
*/
dp = (const uint32_t *)&rp->rm_call.cb_cred;
if (length < 2 * sizeof(*dp))
goto trunc;
len = GET_BE_U_4(dp + 1);
rounded_len = roundup2(len, 4);
ND_TCHECK_LEN(dp + 2, rounded_len);
if (2 * sizeof(*dp) + rounded_len <= length) {
/*
* We have all of the credentials. Skip past them; they
* consist of 4 bytes of flavor, 4 bytes of length,
* and len-rounded-up-to-a-multiple-of-4 bytes of
* data.
*/
dp += (len + (2 * sizeof(*dp) + 3)) / sizeof(*dp);
length -= 2 * sizeof(*dp) + rounded_len;
/*
* Now get the length of the verifier, and make sure
* we have all of the opaque part of the verifier.
*/
if (length < 2 * sizeof(*dp))
goto trunc;
len = GET_BE_U_4(dp + 1);
rounded_len = roundup2(len, 4);
ND_TCHECK_LEN(dp + 2, rounded_len);
if (2 * sizeof(*dp) + rounded_len < length) {
/*
* We have all of the verifier. Skip past it;
* it consists of 4 bytes of flavor, 4 bytes of
* length, and len-rounded-up-to-a-multiple-of-4
* bytes of data.
*/
dp += (len + (2 * sizeof(*dp) + 3)) / sizeof(*dp);
return (dp);
}
}
trunc:
return (NULL);
}
/*
* Print out an NFS file handle and return a pointer to following word.
* If packet was truncated, return 0.
*/
static const uint32_t *
parsefh(netdissect_options *ndo,
const uint32_t *dp, int v3)
{
u_int len;
if (v3) {
len = GET_BE_U_4(dp) / 4;
dp++;
} else
len = NFSX_V2FH / 4;
if (ND_TTEST_LEN(dp, len * sizeof(*dp))) {
nfs_printfh(ndo, dp, len);
return (dp + len);
} else
return NULL;
}
/*
* Print out a file name and return pointer to 32-bit word past it.
* If packet was truncated, return 0.
*/
static const uint32_t *
parsefn(netdissect_options *ndo,
const uint32_t *dp)
{
uint32_t len, rounded_len;
const u_char *cp;
/* Fetch big-endian string length */
len = GET_BE_U_4(dp);
dp++;
if (UINT_MAX - len < 3) {
ND_PRINT("[cannot pad to 32-bit boundaries]");
nd_print_invalid(ndo);
return NULL;
}
rounded_len = roundup2(len, 4);
ND_TCHECK_LEN(dp, rounded_len);
cp = (const u_char *)dp;
/* Update 32-bit pointer (NFS filenames padded to 32-bit boundaries) */
dp += rounded_len / sizeof(*dp);
ND_PRINT("\"");
if (nd_printn(ndo, cp, len, ndo->ndo_snapend)) {
ND_PRINT("\"");
goto trunc;
}
ND_PRINT("\"");
return (dp);
trunc:
return NULL;
}
/*
* Print out file handle and file name.
* Return pointer to 32-bit word past file name.
* If packet was truncated (or there was some other error), return 0.
*/
static const uint32_t *
parsefhn(netdissect_options *ndo,
const uint32_t *dp, int v3)
{
dp = parsefh(ndo, dp, v3);
if (dp == NULL)
return (NULL);
ND_PRINT(" ");
return (parsefn(ndo, dp));
}
void
nfsreq_noaddr_print(netdissect_options *ndo,
const u_char *bp, u_int length,
const u_char *bp2)
{
const struct sunrpc_msg *rp;
const uint32_t *dp;
nfs_type type;
int v3;
uint32_t proc;
uint32_t access_flags;
struct nfsv3_sattr sa3;
ndo->ndo_protocol = "nfs";
ND_PRINT("%u", length);
rp = (const struct sunrpc_msg *)bp;
if (!xid_map_enter(ndo, rp, bp2)) /* record proc number for later on */
goto trunc;
v3 = (GET_BE_U_4(&rp->rm_call.cb_vers) == NFS_VER3);
proc = GET_BE_U_4(&rp->rm_call.cb_proc);
if (!v3 && proc < NFS_NPROCS)
proc = nfsv3_procid[proc];
ND_PRINT(" %s", tok2str(nfsproc_str, "proc-%u", proc));
switch (proc) {
case NFSPROC_GETATTR:
case NFSPROC_SETATTR:
case NFSPROC_READLINK:
case NFSPROC_FSSTAT:
case NFSPROC_FSINFO:
case NFSPROC_PATHCONF:
dp = parsereq(ndo, rp, length);
if (dp == NULL)
goto trunc;
if (parsefh(ndo, dp, v3) == NULL)
goto trunc;
break;
case NFSPROC_LOOKUP:
case NFSPROC_CREATE:
case NFSPROC_MKDIR:
case NFSPROC_REMOVE:
case NFSPROC_RMDIR:
dp = parsereq(ndo, rp, length);
if (dp == NULL)
goto trunc;
if (parsefhn(ndo, dp, v3) == NULL)
goto trunc;
break;
case NFSPROC_ACCESS:
dp = parsereq(ndo, rp, length);
if (dp == NULL)
goto trunc;
dp = parsefh(ndo, dp, v3);
if (dp == NULL)
goto trunc;
access_flags = GET_BE_U_4(dp);
if (access_flags & ~NFSV3ACCESS_FULL) {
/* NFSV3ACCESS definitions aren't up to date */
ND_PRINT(" %04x", access_flags);
} else if ((access_flags & NFSV3ACCESS_FULL) == NFSV3ACCESS_FULL) {
ND_PRINT(" NFS_ACCESS_FULL");
} else {
char separator = ' ';
if (access_flags & NFSV3ACCESS_READ) {
ND_PRINT(" NFS_ACCESS_READ");
separator = '|';
}
if (access_flags & NFSV3ACCESS_LOOKUP) {
ND_PRINT("%cNFS_ACCESS_LOOKUP", separator);
separator = '|';
}
if (access_flags & NFSV3ACCESS_MODIFY) {
ND_PRINT("%cNFS_ACCESS_MODIFY", separator);
separator = '|';
}
if (access_flags & NFSV3ACCESS_EXTEND) {
ND_PRINT("%cNFS_ACCESS_EXTEND", separator);
separator = '|';
}
if (access_flags & NFSV3ACCESS_DELETE) {
ND_PRINT("%cNFS_ACCESS_DELETE", separator);
separator = '|';
}
if (access_flags & NFSV3ACCESS_EXECUTE)
ND_PRINT("%cNFS_ACCESS_EXECUTE", separator);
}
break;
case NFSPROC_READ:
dp = parsereq(ndo, rp, length);
if (dp == NULL)
goto trunc;
dp = parsefh(ndo, dp, v3);
if (dp == NULL)
goto trunc;
if (v3) {
ND_PRINT(" %u bytes @ %" PRIu64,
GET_BE_U_4(dp + 2),
GET_BE_U_8(dp));
} else {
ND_PRINT(" %u bytes @ %u",
GET_BE_U_4(dp + 1),
GET_BE_U_4(dp));
}
break;
case NFSPROC_WRITE:
dp = parsereq(ndo, rp, length);
if (dp == NULL)
goto trunc;
dp = parsefh(ndo, dp, v3);
if (dp == NULL)
goto trunc;
if (v3) {
ND_PRINT(" %u (%u) bytes @ %" PRIu64,
GET_BE_U_4(dp + 4),
GET_BE_U_4(dp + 2),
GET_BE_U_8(dp));
if (ndo->ndo_vflag) {
ND_PRINT(" <%s>",
tok2str(nfsv3_writemodes,
NULL, GET_BE_U_4(dp + 3)));
}
} else {
ND_PRINT(" %u (%u) bytes @ %u (%u)",
GET_BE_U_4(dp + 3),
GET_BE_U_4(dp + 2),
GET_BE_U_4(dp + 1),
GET_BE_U_4(dp));
}
break;
case NFSPROC_SYMLINK:
dp = parsereq(ndo, rp, length);
if (dp == NULL)
goto trunc;
dp = parsefhn(ndo, dp, v3);
if (dp == NULL)
goto trunc;
ND_PRINT(" ->");
if (v3 && (dp = parse_sattr3(ndo, dp, &sa3)) == NULL)
goto trunc;
if (parsefn(ndo, dp) == NULL)
goto trunc;
if (v3 && ndo->ndo_vflag)
print_sattr3(ndo, &sa3, ndo->ndo_vflag);
break;
case NFSPROC_MKNOD:
dp = parsereq(ndo, rp, length);
if (dp == NULL)
goto trunc;
dp = parsefhn(ndo, dp, v3);
if (dp == NULL)
goto trunc;
type = (nfs_type) GET_BE_U_4(dp);
dp++;
dp = parse_sattr3(ndo, dp, &sa3);
if (dp == NULL)
goto trunc;
ND_PRINT(" %s", tok2str(type2str, "unk-ft %u", type));
if (ndo->ndo_vflag && (type == NFCHR || type == NFBLK)) {
ND_PRINT(" %u/%u",
GET_BE_U_4(dp),
GET_BE_U_4(dp + 1));
dp += 2;
}
if (ndo->ndo_vflag)
print_sattr3(ndo, &sa3, ndo->ndo_vflag);
break;
case NFSPROC_RENAME:
dp = parsereq(ndo, rp, length);
if (dp == NULL)
goto trunc;
dp = parsefhn(ndo, dp, v3);
if (dp == NULL)
goto trunc;
ND_PRINT(" ->");
if (parsefhn(ndo, dp, v3) == NULL)
goto trunc;
break;
case NFSPROC_LINK:
dp = parsereq(ndo, rp, length);
if (dp == NULL)
goto trunc;
dp = parsefh(ndo, dp, v3);
if (dp == NULL)
goto trunc;
ND_PRINT(" ->");
if (parsefhn(ndo, dp, v3) == NULL)
goto trunc;
break;
case NFSPROC_READDIR:
dp = parsereq(ndo, rp, length);
if (dp == NULL)
goto trunc;
dp = parsefh(ndo, dp, v3);
if (dp == NULL)
goto trunc;
if (v3) {
/*
* We shouldn't really try to interpret the
* offset cookie here.
*/
ND_PRINT(" %u bytes @ %" PRId64,
GET_BE_U_4(dp + 4),
GET_BE_U_8(dp));
if (ndo->ndo_vflag) {
/*
* This displays the 8 bytes
* of the verifier in order,
* from the low-order byte
* to the high-order byte.
*/
ND_PRINT(" verf %08x%08x",
GET_BE_U_4(dp + 2),
GET_BE_U_4(dp + 3));
}
} else {
/*
* Print the offset as signed, since -1 is
* common, but offsets > 2^31 aren't.
*/
ND_PRINT(" %u bytes @ %u",
GET_BE_U_4(dp + 1),
GET_BE_U_4(dp));
}
break;
case NFSPROC_READDIRPLUS:
dp = parsereq(ndo, rp, length);
if (dp == NULL)
goto trunc;
dp = parsefh(ndo, dp, v3);
if (dp == NULL)
goto trunc;
/*
* We don't try to interpret the offset
* cookie here.
*/
ND_PRINT(" %u bytes @ %" PRId64,
GET_BE_U_4(dp + 4),
GET_BE_U_8(dp));
if (ndo->ndo_vflag) {
/*
* This displays the 8 bytes
* of the verifier in order,
* from the low-order byte
* to the high-order byte.
*/
ND_PRINT(" max %u verf %08x%08x",
GET_BE_U_4(dp + 5),
GET_BE_U_4(dp + 2),
GET_BE_U_4(dp + 3));
}
break;
case NFSPROC_COMMIT:
dp = parsereq(ndo, rp, length);
if (dp == NULL)
goto trunc;
dp = parsefh(ndo, dp, v3);
if (dp == NULL)
goto trunc;
ND_PRINT(" %u bytes @ %" PRIu64,
GET_BE_U_4(dp + 2),
GET_BE_U_8(dp));
break;
default:
break;
}
return;
trunc:
nd_print_trunc(ndo);
}
/*
* Print out an NFS file handle.
* We assume packet was not truncated before the end of the
* file handle pointed to by dp.
*
* Note: new version (using portable file-handle parser) doesn't produce
* generation number. It probably could be made to do that, with some
* additional hacking on the parser code.
*/
static void
nfs_printfh(netdissect_options *ndo,
const uint32_t *dp, const u_int len)
{
my_fsid fsid;
uint32_t ino;
const char *sfsname = NULL;
char *spacep;
if (ndo->ndo_uflag) {
u_int i;
char const *sep = "";
ND_PRINT(" fh[");
for (i=0; i<len; i++) {
/*
* This displays 4 bytes in big-endian byte
* order. That's as good a choice as little-
* endian, as there's no guarantee that the
* server is big-endian or little-endian or
* that the file handle contains 4-byte
* integral fields, and is better than "the
* byte order of the host running tcpdump", as
* the latter means that different hosts
* running tcpdump may show the same file
* handle in different ways.
*/
ND_PRINT("%s%x", sep, GET_BE_U_4(dp + i));
sep = ":";
}
ND_PRINT("]");
return;
}
Parse_fh(ndo, (const u_char *)dp, len, &fsid, &ino, NULL, &sfsname, 0);
if (sfsname) {
/* file system ID is ASCII, not numeric, for this server OS */
char temp[NFSX_V3FHMAX+1];
u_int stringlen;
/* Make sure string is null-terminated */
stringlen = len;
if (stringlen > NFSX_V3FHMAX)
stringlen = NFSX_V3FHMAX;
strncpy(temp, sfsname, stringlen);
temp[stringlen] = '\0';
/* Remove trailing spaces */
spacep = strchr(temp, ' ');
if (spacep)
*spacep = '\0';
ND_PRINT(" fh %s/", temp);
} else {
ND_PRINT(" fh %u,%u/",
fsid.Fsid_dev.Major, fsid.Fsid_dev.Minor);
}
if(fsid.Fsid_dev.Minor == 257)
/* Print the undecoded handle */
ND_PRINT("%s", fsid.Opaque_Handle);
else
ND_PRINT("%ld", (long) ino);
}
/*
* Maintain a small cache of recent client.XID.server/proc pairs, to allow
* us to match up replies with requests and thus to know how to parse
* the reply.
*/
struct xid_map_entry {
uint32_t xid; /* transaction ID (net order) */
int ipver; /* IP version (4 or 6) */
nd_ipv6 client; /* client IP address (net order) */
nd_ipv6 server; /* server IP address (net order) */
uint32_t proc; /* call proc number (host order) */
uint32_t vers; /* program version (host order) */
};
/*
* Map entries are kept in an array that we manage as a ring;
* new entries are always added at the tail of the ring. Initially,
* all the entries are zero and hence don't match anything.
*/
#define XIDMAPSIZE 64
static struct xid_map_entry xid_map[XIDMAPSIZE];
static int xid_map_next = 0;
static int xid_map_hint = 0;
static int
xid_map_enter(netdissect_options *ndo,
const struct sunrpc_msg *rp, const u_char *bp)
{
const struct ip *ip = NULL;
const struct ip6_hdr *ip6 = NULL;
struct xid_map_entry *xmep;
if (!ND_TTEST_4(rp->rm_call.cb_proc))
return (0);
switch (IP_V((const struct ip *)bp)) {
case 4:
ip = (const struct ip *)bp;
break;
case 6:
ip6 = (const struct ip6_hdr *)bp;
break;
default:
return (1);
}
xmep = &xid_map[xid_map_next];
if (++xid_map_next >= XIDMAPSIZE)
xid_map_next = 0;
UNALIGNED_MEMCPY(&xmep->xid, &rp->rm_xid, sizeof(xmep->xid));
if (ip) {
xmep->ipver = 4;
UNALIGNED_MEMCPY(&xmep->client, ip->ip_src,
sizeof(ip->ip_src));
UNALIGNED_MEMCPY(&xmep->server, ip->ip_dst,
sizeof(ip->ip_dst));
}
else if (ip6) {
xmep->ipver = 6;
UNALIGNED_MEMCPY(&xmep->client, ip6->ip6_src,
sizeof(ip6->ip6_src));
UNALIGNED_MEMCPY(&xmep->server, ip6->ip6_dst,
sizeof(ip6->ip6_dst));
}
xmep->proc = GET_BE_U_4(&rp->rm_call.cb_proc);
xmep->vers = GET_BE_U_4(&rp->rm_call.cb_vers);
return (1);
}
/*
* Returns 0 and puts NFSPROC_xxx in proc return and
* version in vers return, or returns -1 on failure
*/
static int
xid_map_find(netdissect_options *ndo, const struct sunrpc_msg *rp,
const u_char *bp, uint32_t *proc, uint32_t *vers)
{
int i;
struct xid_map_entry *xmep;
uint32_t xid;
const struct ip *ip = (const struct ip *)bp;
const struct ip6_hdr *ip6 = (const struct ip6_hdr *)bp;
int cmp;
UNALIGNED_MEMCPY(&xid, &rp->rm_xid, sizeof(xmep->xid));
/* Start searching from where we last left off */
i = xid_map_hint;
do {
xmep = &xid_map[i];
cmp = 1;
if (xmep->ipver != IP_V(ip) || xmep->xid != xid)
goto nextitem;
switch (xmep->ipver) {
case 4:
if (UNALIGNED_MEMCMP(ip->ip_src, &xmep->server,
sizeof(ip->ip_src)) != 0 ||
UNALIGNED_MEMCMP(ip->ip_dst, &xmep->client,
sizeof(ip->ip_dst)) != 0) {
cmp = 0;
}
break;
case 6:
if (UNALIGNED_MEMCMP(ip6->ip6_src, &xmep->server,
sizeof(ip6->ip6_src)) != 0 ||
UNALIGNED_MEMCMP(ip6->ip6_dst, &xmep->client,
sizeof(ip6->ip6_dst)) != 0) {
cmp = 0;
}
break;
default:
cmp = 0;
break;
}
if (cmp) {
/* match */
xid_map_hint = i;
*proc = xmep->proc;
*vers = xmep->vers;
return 0;
}
nextitem:
if (++i >= XIDMAPSIZE)
i = 0;
} while (i != xid_map_hint);
/* search failed */
return (-1);
}
/*
* Routines for parsing reply packets
*/
/*
* Return a pointer to the beginning of the actual results.
* If the packet was truncated, return 0.
*/
static const uint32_t *
parserep(netdissect_options *ndo,
const struct sunrpc_msg *rp, u_int length, int *nfserrp)
{
const uint32_t *dp;
u_int len;
enum sunrpc_accept_stat astat;
/*
* Portability note:
* Here we find the address of the ar_verf credentials.
* Originally, this calculation was
* dp = (uint32_t *)&rp->rm_reply.rp_acpt.ar_verf
* On the wire, the rp_acpt field starts immediately after
* the (32 bit) rp_stat field. However, rp_acpt (which is a
* "struct accepted_reply") contains a "struct opaque_auth",
* whose internal representation contains a pointer, so on a
* 64-bit machine the compiler inserts 32 bits of padding
* before rp->rm_reply.rp_acpt.ar_verf. So, we cannot use
* the internal representation to parse the on-the-wire
* representation. Instead, we skip past the rp_stat field,
* which is an "enum" and so occupies one 32-bit word.
*/
dp = ((const uint32_t *)&rp->rm_reply) + 1;
len = GET_BE_U_4(dp + 1);
if (len >= length)
return (NULL);
/*
* skip past the ar_verf credentials.
*/
dp += (len + (2*sizeof(uint32_t) + 3)) / sizeof(uint32_t);
/*
* now we can check the ar_stat field
*/
astat = (enum sunrpc_accept_stat) GET_BE_U_4(dp);
if (astat != SUNRPC_SUCCESS) {
ND_PRINT(" %s", tok2str(sunrpc_str, "ar_stat %u", astat));
*nfserrp = 1; /* suppress trunc string */
return (NULL);
}
/* successful return */
ND_TCHECK_LEN(dp, sizeof(astat));
return ((const uint32_t *) (sizeof(astat) + ((const char *)dp)));
trunc:
return (0);
}
static const uint32_t *
parsestatus(netdissect_options *ndo,
const uint32_t *dp, u_int *er, int *nfserrp)
{
u_int errnum;
errnum = GET_BE_U_4(dp);
if (er)
*er = errnum;
if (errnum != 0) {
if (!ndo->ndo_qflag)
ND_PRINT(" ERROR: %s",
tok2str(status2str, "unk %u", errnum));
*nfserrp = 1;
}
return (dp + 1);
}
static const uint32_t *
parsefattr(netdissect_options *ndo,
const uint32_t *dp, int verbose, int v3)
{
const struct nfs_fattr *fap;
fap = (const struct nfs_fattr *)dp;
ND_TCHECK_4(fap->fa_gid);
if (verbose) {
/*
* XXX - UIDs and GIDs are unsigned in NFS and in
* at least some UN*Xes, but we'll show them as
* signed because -2 has traditionally been the
* UID for "nobody", rather than 4294967294.
*/
ND_PRINT(" %s %o ids %d/%d",
tok2str(type2str, "unk-ft %u ",
GET_BE_U_4(fap->fa_type)),
GET_BE_U_4(fap->fa_mode),
GET_BE_S_4(fap->fa_uid),
GET_BE_S_4(fap->fa_gid));
if (v3) {
ND_PRINT(" sz %" PRIu64,
GET_BE_U_8(fap->fa3_size));
} else {
ND_PRINT(" sz %u", GET_BE_U_4(fap->fa2_size));
}
}
/* print lots more stuff */
if (verbose > 1) {
if (v3) {
ND_TCHECK_8(&fap->fa3_ctime);
ND_PRINT(" nlink %u rdev %u/%u",
GET_BE_U_4(fap->fa_nlink),
GET_BE_U_4(fap->fa3_rdev.specdata1),
GET_BE_U_4(fap->fa3_rdev.specdata2));
ND_PRINT(" fsid %" PRIx64,
GET_BE_U_8(fap->fa3_fsid));
ND_PRINT(" fileid %" PRIx64,
GET_BE_U_8(fap->fa3_fileid));
ND_PRINT(" a/m/ctime %u.%06u",
GET_BE_U_4(fap->fa3_atime.nfsv3_sec),
GET_BE_U_4(fap->fa3_atime.nfsv3_nsec));
ND_PRINT(" %u.%06u",
GET_BE_U_4(fap->fa3_mtime.nfsv3_sec),
GET_BE_U_4(fap->fa3_mtime.nfsv3_nsec));
ND_PRINT(" %u.%06u",
GET_BE_U_4(fap->fa3_ctime.nfsv3_sec),
GET_BE_U_4(fap->fa3_ctime.nfsv3_nsec));
} else {
ND_TCHECK_8(&fap->fa2_ctime);
ND_PRINT(" nlink %u rdev 0x%x fsid 0x%x nodeid 0x%x a/m/ctime",
GET_BE_U_4(fap->fa_nlink),
GET_BE_U_4(fap->fa2_rdev),
GET_BE_U_4(fap->fa2_fsid),
GET_BE_U_4(fap->fa2_fileid));
ND_PRINT(" %u.%06u",
GET_BE_U_4(fap->fa2_atime.nfsv2_sec),
GET_BE_U_4(fap->fa2_atime.nfsv2_usec));
ND_PRINT(" %u.%06u",
GET_BE_U_4(fap->fa2_mtime.nfsv2_sec),
GET_BE_U_4(fap->fa2_mtime.nfsv2_usec));
ND_PRINT(" %u.%06u",
GET_BE_U_4(fap->fa2_ctime.nfsv2_sec),
GET_BE_U_4(fap->fa2_ctime.nfsv2_usec));
}
}
return ((const uint32_t *)((const unsigned char *)dp +
(v3 ? NFSX_V3FATTR : NFSX_V2FATTR)));
trunc:
return (NULL);
}
static int
parseattrstat(netdissect_options *ndo,
const uint32_t *dp, int verbose, int v3, int *nfserrp)
{
u_int er;
dp = parsestatus(ndo, dp, &er, nfserrp);
if (dp == NULL)
return (0);
if (er)
return (1);
return (parsefattr(ndo, dp, verbose, v3) != NULL);
}
static int
parsediropres(netdissect_options *ndo,
const uint32_t *dp, int *nfserrp)
{
u_int er;
dp = parsestatus(ndo, dp, &er, nfserrp);
if (dp == NULL)
return (0);
if (er)
return (1);
dp = parsefh(ndo, dp, 0);
if (dp == NULL)
return (0);
return (parsefattr(ndo, dp, ndo->ndo_vflag, 0) != NULL);
}
static int
parselinkres(netdissect_options *ndo,
const uint32_t *dp, int v3, int *nfserrp)
{
u_int er;
dp = parsestatus(ndo, dp, &er, nfserrp);
if (dp == NULL)
return(0);
if (er)
return(1);
if (v3) {
dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
if (dp == NULL)
return (0);
}
ND_PRINT(" ");
return (parsefn(ndo, dp) != NULL);
}
static int
parsestatfs(netdissect_options *ndo,
const uint32_t *dp, int v3, int *nfserrp)
{
const struct nfs_statfs *sfsp;
u_int er;
dp = parsestatus(ndo, dp, &er, nfserrp);
if (dp == NULL)
return (0);
if (!v3 && er)
return (1);
if (ndo->ndo_qflag)
return(1);
if (v3) {
if (ndo->ndo_vflag)
ND_PRINT(" POST:");
dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
if (dp == NULL)
return (0);
}
ND_TCHECK_LEN(dp, (v3 ? NFSX_V3STATFS : NFSX_V2STATFS));
sfsp = (const struct nfs_statfs *)dp;
if (v3) {
ND_PRINT(" tbytes %" PRIu64 " fbytes %" PRIu64 " abytes %" PRIu64,
GET_BE_U_8(sfsp->sf_tbytes),
GET_BE_U_8(sfsp->sf_fbytes),
GET_BE_U_8(sfsp->sf_abytes));
if (ndo->ndo_vflag) {
ND_PRINT(" tfiles %" PRIu64 " ffiles %" PRIu64 " afiles %" PRIu64 " invar %u",
GET_BE_U_8(sfsp->sf_tfiles),
GET_BE_U_8(sfsp->sf_ffiles),
GET_BE_U_8(sfsp->sf_afiles),
GET_BE_U_4(sfsp->sf_invarsec));
}
} else {
ND_PRINT(" tsize %u bsize %u blocks %u bfree %u bavail %u",
GET_BE_U_4(sfsp->sf_tsize),
GET_BE_U_4(sfsp->sf_bsize),
GET_BE_U_4(sfsp->sf_blocks),
GET_BE_U_4(sfsp->sf_bfree),
GET_BE_U_4(sfsp->sf_bavail));
}
return (1);
trunc:
return (0);
}
static int
parserddires(netdissect_options *ndo,
const uint32_t *dp, int *nfserrp)
{
u_int er;
dp = parsestatus(ndo, dp, &er, nfserrp);
if (dp == NULL)
return (0);
if (er)
return (1);
if (ndo->ndo_qflag)
return (1);
ND_PRINT(" offset 0x%x size %u ",
GET_BE_U_4(dp), GET_BE_U_4(dp + 1));
if (GET_BE_U_4(dp + 2) != 0)
ND_PRINT(" eof");
return (1);
}
static const uint32_t *
parse_wcc_attr(netdissect_options *ndo,
const uint32_t *dp)
{
/* Our caller has already checked this */
ND_PRINT(" sz %" PRIu64, GET_BE_U_8(dp));
ND_PRINT(" mtime %u.%06u ctime %u.%06u",
GET_BE_U_4(dp + 2), GET_BE_U_4(dp + 3),
GET_BE_U_4(dp + 4), GET_BE_U_4(dp + 5));
return (dp + 6);
}
/*
* Pre operation attributes. Print only if vflag > 1.
*/
static const uint32_t *
parse_pre_op_attr(netdissect_options *ndo,
const uint32_t *dp, int verbose)
{
if (!GET_BE_U_4(dp))
return (dp + 1);
dp++;
ND_TCHECK_LEN(dp, 24);
if (verbose > 1) {
return parse_wcc_attr(ndo, dp);
} else {
/* If not verbose enough, just skip over wcc_attr */
return (dp + 6);
}
trunc:
return (NULL);
}
/*
* Post operation attributes are printed if vflag >= 1
*/
static const uint32_t *
parse_post_op_attr(netdissect_options *ndo,
const uint32_t *dp, int verbose)
{
if (!GET_BE_U_4(dp))
return (dp + 1);
dp++;
if (verbose) {
return parsefattr(ndo, dp, verbose, 1);
} else
return (dp + (NFSX_V3FATTR / sizeof (uint32_t)));
}
static const uint32_t *
parse_wcc_data(netdissect_options *ndo,
const uint32_t *dp, int verbose)
{
if (verbose > 1)
ND_PRINT(" PRE:");
dp = parse_pre_op_attr(ndo, dp, verbose);
if (dp == NULL)
return (0);
if (verbose)
ND_PRINT(" POST:");
return parse_post_op_attr(ndo, dp, verbose);
}
static const uint32_t *
parsecreateopres(netdissect_options *ndo,
const uint32_t *dp, int verbose, int *nfserrp)
{
u_int er;
dp = parsestatus(ndo, dp, &er, nfserrp);
if (dp == NULL)
return (0);
if (er)
dp = parse_wcc_data(ndo, dp, verbose);
else {
if (!GET_BE_U_4(dp))
return (dp + 1);
dp++;
dp = parsefh(ndo, dp, 1);
if (dp == NULL)
return (0);
if (verbose) {
dp = parse_post_op_attr(ndo, dp, verbose);
if (dp == NULL)
return (0);
if (ndo->ndo_vflag > 1) {
ND_PRINT(" dir attr:");
dp = parse_wcc_data(ndo, dp, verbose);
}
}
}
return (dp);
}
static const uint32_t *
parsewccres(netdissect_options *ndo,
const uint32_t *dp, int verbose, int *nfserrp)
{
u_int er;
dp = parsestatus(ndo, dp, &er, nfserrp);
if (dp == NULL)
return (0);
return parse_wcc_data(ndo, dp, verbose);
}
static const uint32_t *
parsev3rddirres(netdissect_options *ndo,
const uint32_t *dp, int verbose, int *nfserrp)
{
u_int er;
dp = parsestatus(ndo, dp, &er, nfserrp);
if (dp == NULL)
return (0);
if (ndo->ndo_vflag)
ND_PRINT(" POST:");
dp = parse_post_op_attr(ndo, dp, verbose);
if (dp == NULL)
return (0);
if (er)
return dp;
if (ndo->ndo_vflag) {
/*
* This displays the 8 bytes of the verifier in order,
* from the low-order byte to the high-order byte.
*/
ND_PRINT(" verf %08x%08x",
GET_BE_U_4(dp), GET_BE_U_4(dp + 1));
dp += 2;
}
return dp;
}
static int
parsefsinfo(netdissect_options *ndo,
const uint32_t *dp, int *nfserrp)
{
const struct nfsv3_fsinfo *sfp;
u_int er;
dp = parsestatus(ndo, dp, &er, nfserrp);
if (dp == NULL)
return (0);
if (ndo->ndo_vflag)
ND_PRINT(" POST:");
dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
if (dp == NULL)
return (0);
if (er)
return (1);
sfp = (const struct nfsv3_fsinfo *)dp;
ND_TCHECK_SIZE(sfp);
ND_PRINT(" rtmax %u rtpref %u wtmax %u wtpref %u dtpref %u",
GET_BE_U_4(sfp->fs_rtmax),
GET_BE_U_4(sfp->fs_rtpref),
GET_BE_U_4(sfp->fs_wtmax),
GET_BE_U_4(sfp->fs_wtpref),
GET_BE_U_4(sfp->fs_dtpref));
if (ndo->ndo_vflag) {
ND_PRINT(" rtmult %u wtmult %u maxfsz %" PRIu64,
GET_BE_U_4(sfp->fs_rtmult),
GET_BE_U_4(sfp->fs_wtmult),
GET_BE_U_8(sfp->fs_maxfilesize));
ND_PRINT(" delta %u.%06u ",
GET_BE_U_4(sfp->fs_timedelta.nfsv3_sec),
GET_BE_U_4(sfp->fs_timedelta.nfsv3_nsec));
}
return (1);
trunc:
return (0);
}
static int
parsepathconf(netdissect_options *ndo,
const uint32_t *dp, int *nfserrp)
{
u_int er;
const struct nfsv3_pathconf *spp;
dp = parsestatus(ndo, dp, &er, nfserrp);
if (dp == NULL)
return (0);
if (ndo->ndo_vflag)
ND_PRINT(" POST:");
dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
if (dp == NULL)
return (0);
if (er)
return (1);
spp = (const struct nfsv3_pathconf *)dp;
ND_TCHECK_SIZE(spp);
ND_PRINT(" linkmax %u namemax %u %s %s %s %s",
GET_BE_U_4(spp->pc_linkmax),
GET_BE_U_4(spp->pc_namemax),
GET_BE_U_4(spp->pc_notrunc) ? "notrunc" : "",
GET_BE_U_4(spp->pc_chownrestricted) ? "chownres" : "",
GET_BE_U_4(spp->pc_caseinsensitive) ? "igncase" : "",
GET_BE_U_4(spp->pc_casepreserving) ? "keepcase" : "");
return (1);
trunc:
return (0);
}
static void
interp_reply(netdissect_options *ndo,
const struct sunrpc_msg *rp, uint32_t proc, uint32_t vers,
int length)
{
const uint32_t *dp;
int v3;
u_int er;
int nfserr = 0;
v3 = (vers == NFS_VER3);
if (!v3 && proc < NFS_NPROCS)
proc = nfsv3_procid[proc];
ND_PRINT(" %s", tok2str(nfsproc_str, "proc-%u", proc));
switch (proc) {
case NFSPROC_GETATTR:
dp = parserep(ndo, rp, length, &nfserr);
if (dp == NULL)
goto trunc;
if (parseattrstat(ndo, dp, !ndo->ndo_qflag, v3, &nfserr) == 0)
goto trunc;
break;
case NFSPROC_SETATTR:
dp = parserep(ndo, rp, length, &nfserr);
if (dp == NULL)
goto trunc;
if (v3) {
if (parsewccres(ndo, dp, ndo->ndo_vflag, &nfserr) == 0)
goto trunc;
} else {
if (parseattrstat(ndo, dp, !ndo->ndo_qflag, 0, &nfserr) == 0)
goto trunc;
}
break;
case NFSPROC_LOOKUP:
dp = parserep(ndo, rp, length, &nfserr);
if (dp == NULL)
goto trunc;
if (v3) {
dp = parsestatus(ndo, dp, &er, &nfserr);
if (dp == NULL)
goto trunc;
if (er) {
if (ndo->ndo_vflag > 1) {
ND_PRINT(" post dattr:");
dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
if (dp == NULL)
goto trunc;
}
} else {
dp = parsefh(ndo, dp, v3);
if (dp == NULL)
goto trunc;
dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
if (dp == NULL)
goto trunc;
if (ndo->ndo_vflag > 1) {
ND_PRINT(" post dattr:");
dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
if (dp == NULL)
goto trunc;
}
}
} else {
if (parsediropres(ndo, dp, &nfserr) == 0)
goto trunc;
}
break;
case NFSPROC_ACCESS:
dp = parserep(ndo, rp, length, &nfserr);
if (dp == NULL)
goto trunc;
dp = parsestatus(ndo, dp, &er, &nfserr);
if (dp == NULL)
goto trunc;
if (ndo->ndo_vflag)
ND_PRINT(" attr:");
dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
if (dp == NULL)
goto trunc;
if (!er) {
ND_PRINT(" c %04x", GET_BE_U_4(dp));
}
break;
case NFSPROC_READLINK:
dp = parserep(ndo, rp, length, &nfserr);
if (dp == NULL)
goto trunc;
if (parselinkres(ndo, dp, v3, &nfserr) == 0)
goto trunc;
break;
case NFSPROC_READ:
dp = parserep(ndo, rp, length, &nfserr);
if (dp == NULL)
goto trunc;
if (v3) {
dp = parsestatus(ndo, dp, &er, &nfserr);
if (dp == NULL)
goto trunc;
dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
if (dp == NULL)
goto trunc;
if (!er) {
if (ndo->ndo_vflag) {
ND_PRINT(" %u bytes", GET_BE_U_4(dp));
if (GET_BE_U_4(dp + 1))
ND_PRINT(" EOF");
}
}
} else {
if (parseattrstat(ndo, dp, ndo->ndo_vflag, 0, &nfserr) == 0)
goto trunc;
}
break;
case NFSPROC_WRITE:
dp = parserep(ndo, rp, length, &nfserr);
if (dp == NULL)
goto trunc;
if (v3) {
dp = parsestatus(ndo, dp, &er, &nfserr);
if (dp == NULL)
goto trunc;
dp = parse_wcc_data(ndo, dp, ndo->ndo_vflag);
if (dp == NULL)
goto trunc;
if (!er) {
if (ndo->ndo_vflag) {
ND_PRINT(" %u bytes", GET_BE_U_4(dp));
if (ndo->ndo_vflag > 1) {
ND_PRINT(" <%s>",
tok2str(nfsv3_writemodes,
NULL, GET_BE_U_4(dp + 1)));
/* write-verf-cookie */
ND_PRINT(" verf %" PRIx64,
GET_BE_U_8(dp + 2));
}
}
}
return;
} else {
if (parseattrstat(ndo, dp, ndo->ndo_vflag, v3, &nfserr) == 0)
goto trunc;
}
break;
case NFSPROC_CREATE:
case NFSPROC_MKDIR:
dp = parserep(ndo, rp, length, &nfserr);
if (dp == NULL)
goto trunc;
if (v3) {
if (parsecreateopres(ndo, dp, ndo->ndo_vflag, &nfserr) == NULL)
goto trunc;
} else {
if (parsediropres(ndo, dp, &nfserr) == 0)
goto trunc;
}
break;
case NFSPROC_SYMLINK:
dp = parserep(ndo, rp, length, &nfserr);
if (dp == NULL)
goto trunc;
if (v3) {
if (parsecreateopres(ndo, dp, ndo->ndo_vflag, &nfserr) == NULL)
goto trunc;
} else {
if (parsestatus(ndo, dp, &er, &nfserr) == NULL)
goto trunc;
}
break;
case NFSPROC_MKNOD:
dp = parserep(ndo, rp, length, &nfserr);
if (dp == NULL)
goto trunc;
if (parsecreateopres(ndo, dp, ndo->ndo_vflag, &nfserr) == NULL)
goto trunc;
break;
case NFSPROC_REMOVE:
case NFSPROC_RMDIR:
dp = parserep(ndo, rp, length, &nfserr);
if (dp == NULL)
goto trunc;
if (v3) {
if (parsewccres(ndo, dp, ndo->ndo_vflag, &nfserr) == NULL)
goto trunc;
} else {
if (parsestatus(ndo, dp, &er, &nfserr) == NULL)
goto trunc;
}
break;
case NFSPROC_RENAME:
dp = parserep(ndo, rp, length, &nfserr);
if (dp == NULL)
goto trunc;
if (v3) {
dp = parsestatus(ndo, dp, &er, &nfserr);
if (dp == NULL)
goto trunc;
if (ndo->ndo_vflag) {
ND_PRINT(" from:");
dp = parse_wcc_data(ndo, dp, ndo->ndo_vflag);
if (dp == NULL)
goto trunc;
ND_PRINT(" to:");
dp = parse_wcc_data(ndo, dp, ndo->ndo_vflag);
if (dp == NULL)
goto trunc;
}
} else {
if (parsestatus(ndo, dp, &er, &nfserr) == NULL)
goto trunc;
}
break;
case NFSPROC_LINK:
dp = parserep(ndo, rp, length, &nfserr);
if (dp == NULL)
goto trunc;
if (v3) {
dp = parsestatus(ndo, dp, &er, &nfserr);
if (dp == NULL)
goto trunc;
if (ndo->ndo_vflag) {
ND_PRINT(" file POST:");
dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
if (dp == NULL)
goto trunc;
ND_PRINT(" dir:");
dp = parse_wcc_data(ndo, dp, ndo->ndo_vflag);
if (dp == NULL)
goto trunc;
}
return;
} else {
if (parsestatus(ndo, dp, &er, &nfserr) == NULL)
goto trunc;
}
break;
case NFSPROC_READDIR:
dp = parserep(ndo, rp, length, &nfserr);
if (dp == NULL)
goto trunc;
if (v3) {
if (parsev3rddirres(ndo, dp, ndo->ndo_vflag, &nfserr) == NULL)
goto trunc;
} else {
if (parserddires(ndo, dp, &nfserr) == 0)
goto trunc;
}
break;
case NFSPROC_READDIRPLUS:
dp = parserep(ndo, rp, length, &nfserr);
if (dp == NULL)
goto trunc;
if (parsev3rddirres(ndo, dp, ndo->ndo_vflag, &nfserr) == NULL)
goto trunc;
break;
case NFSPROC_FSSTAT:
dp = parserep(ndo, rp, length, &nfserr);
if (dp == NULL)
goto trunc;
if (parsestatfs(ndo, dp, v3, &nfserr) == 0)
goto trunc;
break;
case NFSPROC_FSINFO:
dp = parserep(ndo, rp, length, &nfserr);
if (dp == NULL)
goto trunc;
if (parsefsinfo(ndo, dp, &nfserr) == 0)
goto trunc;
break;
case NFSPROC_PATHCONF:
dp = parserep(ndo, rp, length, &nfserr);
if (dp == NULL)
goto trunc;
if (parsepathconf(ndo, dp, &nfserr) == 0)
goto trunc;
break;
case NFSPROC_COMMIT:
dp = parserep(ndo, rp, length, &nfserr);
if (dp == NULL)
goto trunc;
dp = parsewccres(ndo, dp, ndo->ndo_vflag, &nfserr);
if (dp == NULL)
goto trunc;
if (ndo->ndo_vflag > 1) {
/* write-verf-cookie */
ND_PRINT(" verf %" PRIx64, GET_BE_U_8(dp));
}
break;
default:
break;
}
return;
trunc:
if (!nfserr)
nd_print_trunc(ndo);
}
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