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1 /*
2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 */
21
22 /* \summary: Network File System (NFS) printer */
23
24 #ifdef HAVE_CONFIG_H
25 #include "config.h"
26 #endif
27
28 #include <netdissect-stdinc.h>
29
30 #include <stdio.h>
31 #include <string.h>
32
33 #include "netdissect.h"
34 #include "addrtoname.h"
35 #include "extract.h"
36
37 #include "nfs.h"
38 #include "nfsfh.h"
39
40 #include "ip.h"
41 #include "ip6.h"
42 #include "rpc_auth.h"
43 #include "rpc_msg.h"
44
45 static const char tstr[] = " [|nfs]";
46
47 static void nfs_printfh(netdissect_options *, const uint32_t *, const u_int);
48 static int xid_map_enter(netdissect_options *, const struct sunrpc_msg *, const u_char *);
49 static int xid_map_find(const struct sunrpc_msg *, const u_char *,
50 uint32_t *, uint32_t *);
51 static void interp_reply(netdissect_options *, const struct sunrpc_msg *, uint32_t, uint32_t, int);
52 static const uint32_t *parse_post_op_attr(netdissect_options *, const uint32_t *, int);
53
54 /*
55 * Mapping of old NFS Version 2 RPC numbers to generic numbers.
56 */
57 static uint32_t nfsv3_procid[NFS_NPROCS] = {
58 NFSPROC_NULL,
59 NFSPROC_GETATTR,
60 NFSPROC_SETATTR,
61 NFSPROC_NOOP,
62 NFSPROC_LOOKUP,
63 NFSPROC_READLINK,
64 NFSPROC_READ,
65 NFSPROC_NOOP,
66 NFSPROC_WRITE,
67 NFSPROC_CREATE,
68 NFSPROC_REMOVE,
69 NFSPROC_RENAME,
70 NFSPROC_LINK,
71 NFSPROC_SYMLINK,
72 NFSPROC_MKDIR,
73 NFSPROC_RMDIR,
74 NFSPROC_READDIR,
75 NFSPROC_FSSTAT,
76 NFSPROC_NOOP,
77 NFSPROC_NOOP,
78 NFSPROC_NOOP,
79 NFSPROC_NOOP,
80 NFSPROC_NOOP,
81 NFSPROC_NOOP,
82 NFSPROC_NOOP,
83 NFSPROC_NOOP
84 };
85
86 static const struct tok nfsproc_str[] = {
87 { NFSPROC_NOOP, "nop" },
88 { NFSPROC_NULL, "null" },
89 { NFSPROC_GETATTR, "getattr" },
90 { NFSPROC_SETATTR, "setattr" },
91 { NFSPROC_LOOKUP, "lookup" },
92 { NFSPROC_ACCESS, "access" },
93 { NFSPROC_READLINK, "readlink" },
94 { NFSPROC_READ, "read" },
95 { NFSPROC_WRITE, "write" },
96 { NFSPROC_CREATE, "create" },
97 { NFSPROC_MKDIR, "mkdir" },
98 { NFSPROC_SYMLINK, "symlink" },
99 { NFSPROC_MKNOD, "mknod" },
100 { NFSPROC_REMOVE, "remove" },
101 { NFSPROC_RMDIR, "rmdir" },
102 { NFSPROC_RENAME, "rename" },
103 { NFSPROC_LINK, "link" },
104 { NFSPROC_READDIR, "readdir" },
105 { NFSPROC_READDIRPLUS, "readdirplus" },
106 { NFSPROC_FSSTAT, "fsstat" },
107 { NFSPROC_FSINFO, "fsinfo" },
108 { NFSPROC_PATHCONF, "pathconf" },
109 { NFSPROC_COMMIT, "commit" },
110 { 0, NULL }
111 };
112
113 /*
114 * NFS V2 and V3 status values.
115 *
116 * Some of these come from the RFCs for NFS V2 and V3, with the message
117 * strings taken from the FreeBSD C library "errlst.c".
118 *
119 * Others are errors that are not in the RFC but that I suspect some
120 * NFS servers could return; the values are FreeBSD errno values, as
121 * the first NFS server was the SunOS 2.0 one, and until 5.0 SunOS
122 * was primarily BSD-derived.
123 */
124 static const struct tok status2str[] = {
125 { 1, "Operation not permitted" }, /* EPERM */
126 { 2, "No such file or directory" }, /* ENOENT */
127 { 5, "Input/output error" }, /* EIO */
128 { 6, "Device not configured" }, /* ENXIO */
129 { 11, "Resource deadlock avoided" }, /* EDEADLK */
130 { 12, "Cannot allocate memory" }, /* ENOMEM */
131 { 13, "Permission denied" }, /* EACCES */
132 { 17, "File exists" }, /* EEXIST */
133 { 18, "Cross-device link" }, /* EXDEV */
134 { 19, "Operation not supported by device" }, /* ENODEV */
135 { 20, "Not a directory" }, /* ENOTDIR */
136 { 21, "Is a directory" }, /* EISDIR */
137 { 22, "Invalid argument" }, /* EINVAL */
138 { 26, "Text file busy" }, /* ETXTBSY */
139 { 27, "File too large" }, /* EFBIG */
140 { 28, "No space left on device" }, /* ENOSPC */
141 { 30, "Read-only file system" }, /* EROFS */
142 { 31, "Too many links" }, /* EMLINK */
143 { 45, "Operation not supported" }, /* EOPNOTSUPP */
144 { 62, "Too many levels of symbolic links" }, /* ELOOP */
145 { 63, "File name too long" }, /* ENAMETOOLONG */
146 { 66, "Directory not empty" }, /* ENOTEMPTY */
147 { 69, "Disc quota exceeded" }, /* EDQUOT */
148 { 70, "Stale NFS file handle" }, /* ESTALE */
149 { 71, "Too many levels of remote in path" }, /* EREMOTE */
150 { 99, "Write cache flushed to disk" }, /* NFSERR_WFLUSH (not used) */
151 { 10001, "Illegal NFS file handle" }, /* NFS3ERR_BADHANDLE */
152 { 10002, "Update synchronization mismatch" }, /* NFS3ERR_NOT_SYNC */
153 { 10003, "READDIR/READDIRPLUS cookie is stale" }, /* NFS3ERR_BAD_COOKIE */
154 { 10004, "Operation not supported" }, /* NFS3ERR_NOTSUPP */
155 { 10005, "Buffer or request is too small" }, /* NFS3ERR_TOOSMALL */
156 { 10006, "Unspecified error on server" }, /* NFS3ERR_SERVERFAULT */
157 { 10007, "Object of that type not supported" }, /* NFS3ERR_BADTYPE */
158 { 10008, "Request couldn't be completed in time" }, /* NFS3ERR_JUKEBOX */
159 { 0, NULL }
160 };
161
162 static const struct tok nfsv3_writemodes[] = {
163 { 0, "unstable" },
164 { 1, "datasync" },
165 { 2, "filesync" },
166 { 0, NULL }
167 };
168
169 static const struct tok type2str[] = {
170 { NFNON, "NON" },
171 { NFREG, "REG" },
172 { NFDIR, "DIR" },
173 { NFBLK, "BLK" },
174 { NFCHR, "CHR" },
175 { NFLNK, "LNK" },
176 { NFFIFO, "FIFO" },
177 { 0, NULL }
178 };
179
180 static const struct tok sunrpc_auth_str[] = {
181 { SUNRPC_AUTH_OK, "OK" },
182 { SUNRPC_AUTH_BADCRED, "Bogus Credentials (seal broken)" },
183 { SUNRPC_AUTH_REJECTEDCRED, "Rejected Credentials (client should begin new session)" },
184 { SUNRPC_AUTH_BADVERF, "Bogus Verifier (seal broken)" },
185 { SUNRPC_AUTH_REJECTEDVERF, "Verifier expired or was replayed" },
186 { SUNRPC_AUTH_TOOWEAK, "Credentials are too weak" },
187 { SUNRPC_AUTH_INVALIDRESP, "Bogus response verifier" },
188 { SUNRPC_AUTH_FAILED, "Unknown failure" },
189 { 0, NULL }
190 };
191
192 static const struct tok sunrpc_str[] = {
193 { SUNRPC_PROG_UNAVAIL, "PROG_UNAVAIL" },
194 { SUNRPC_PROG_MISMATCH, "PROG_MISMATCH" },
195 { SUNRPC_PROC_UNAVAIL, "PROC_UNAVAIL" },
196 { SUNRPC_GARBAGE_ARGS, "GARBAGE_ARGS" },
197 { SUNRPC_SYSTEM_ERR, "SYSTEM_ERR" },
198 { 0, NULL }
199 };
200
201 static void
202 print_nfsaddr(netdissect_options *ndo,
203 const u_char *bp, const char *s, const char *d)
204 {
205 const struct ip *ip;
206 const struct ip6_hdr *ip6;
207 char srcaddr[INET6_ADDRSTRLEN], dstaddr[INET6_ADDRSTRLEN];
208
209 srcaddr[0] = dstaddr[0] = '\0';
210 switch (IP_V((const struct ip *)bp)) {
211 case 4:
212 ip = (const struct ip *)bp;
213 strlcpy(srcaddr, ipaddr_string(ndo, &ip->ip_src), sizeof(srcaddr));
214 strlcpy(dstaddr, ipaddr_string(ndo, &ip->ip_dst), sizeof(dstaddr));
215 break;
216 case 6:
217 ip6 = (const struct ip6_hdr *)bp;
218 strlcpy(srcaddr, ip6addr_string(ndo, &ip6->ip6_src),
219 sizeof(srcaddr));
220 strlcpy(dstaddr, ip6addr_string(ndo, &ip6->ip6_dst),
221 sizeof(dstaddr));
222 break;
223 default:
224 strlcpy(srcaddr, "?", sizeof(srcaddr));
225 strlcpy(dstaddr, "?", sizeof(dstaddr));
226 break;
227 }
228
229 ND_PRINT((ndo, "%s.%s > %s.%s: ", srcaddr, s, dstaddr, d));
230 }
231
232 static const uint32_t *
233 parse_sattr3(netdissect_options *ndo,
234 const uint32_t *dp, struct nfsv3_sattr *sa3)
235 {
236 ND_TCHECK(dp[0]);
237 sa3->sa_modeset = EXTRACT_BE_U_4(dp);
238 dp++;
239 if (sa3->sa_modeset) {
240 ND_TCHECK(dp[0]);
241 sa3->sa_mode = EXTRACT_BE_U_4(dp);
242 dp++;
243 }
244
245 ND_TCHECK(dp[0]);
246 sa3->sa_uidset = EXTRACT_BE_U_4(dp);
247 dp++;
248 if (sa3->sa_uidset) {
249 ND_TCHECK(dp[0]);
250 sa3->sa_uid = EXTRACT_BE_U_4(dp);
251 dp++;
252 }
253
254 ND_TCHECK(dp[0]);
255 sa3->sa_gidset = EXTRACT_BE_U_4(dp);
256 dp++;
257 if (sa3->sa_gidset) {
258 ND_TCHECK(dp[0]);
259 sa3->sa_gid = EXTRACT_BE_U_4(dp);
260 dp++;
261 }
262
263 ND_TCHECK(dp[0]);
264 sa3->sa_sizeset = EXTRACT_BE_U_4(dp);
265 dp++;
266 if (sa3->sa_sizeset) {
267 ND_TCHECK(dp[0]);
268 sa3->sa_size = EXTRACT_BE_U_4(dp);
269 dp++;
270 }
271
272 ND_TCHECK(dp[0]);
273 sa3->sa_atimetype = EXTRACT_BE_U_4(dp);
274 dp++;
275 if (sa3->sa_atimetype == NFSV3SATTRTIME_TOCLIENT) {
276 ND_TCHECK(dp[1]);
277 sa3->sa_atime.nfsv3_sec = EXTRACT_BE_U_4(dp);
278 dp++;
279 sa3->sa_atime.nfsv3_nsec = EXTRACT_BE_U_4(dp);
280 dp++;
281 }
282
283 ND_TCHECK(dp[0]);
284 sa3->sa_mtimetype = EXTRACT_BE_U_4(dp);
285 dp++;
286 if (sa3->sa_mtimetype == NFSV3SATTRTIME_TOCLIENT) {
287 ND_TCHECK(dp[1]);
288 sa3->sa_mtime.nfsv3_sec = EXTRACT_BE_U_4(dp);
289 dp++;
290 sa3->sa_mtime.nfsv3_nsec = EXTRACT_BE_U_4(dp);
291 dp++;
292 }
293
294 return dp;
295 trunc:
296 return NULL;
297 }
298
299 static int nfserr; /* true if we error rather than trunc */
300
301 static void
302 print_sattr3(netdissect_options *ndo,
303 const struct nfsv3_sattr *sa3, int verbose)
304 {
305 if (sa3->sa_modeset)
306 ND_PRINT((ndo, " mode %o", sa3->sa_mode));
307 if (sa3->sa_uidset)
308 ND_PRINT((ndo, " uid %u", sa3->sa_uid));
309 if (sa3->sa_gidset)
310 ND_PRINT((ndo, " gid %u", sa3->sa_gid));
311 if (verbose > 1) {
312 if (sa3->sa_atimetype == NFSV3SATTRTIME_TOCLIENT)
313 ND_PRINT((ndo, " atime %u.%06u", sa3->sa_atime.nfsv3_sec,
314 sa3->sa_atime.nfsv3_nsec));
315 if (sa3->sa_mtimetype == NFSV3SATTRTIME_TOCLIENT)
316 ND_PRINT((ndo, " mtime %u.%06u", sa3->sa_mtime.nfsv3_sec,
317 sa3->sa_mtime.nfsv3_nsec));
318 }
319 }
320
321 void
322 nfsreply_print(netdissect_options *ndo,
323 const u_char *bp, u_int length,
324 const u_char *bp2)
325 {
326 const struct sunrpc_msg *rp;
327 char srcid[20], dstid[20]; /*fits 32bit*/
328
329 nfserr = 0; /* assume no error */
330 rp = (const struct sunrpc_msg *)bp;
331
332 ND_TCHECK(rp->rm_xid);
333 if (!ndo->ndo_nflag) {
334 strlcpy(srcid, "nfs", sizeof(srcid));
335 snprintf(dstid, sizeof(dstid), "%u",
336 EXTRACT_BE_U_4(&rp->rm_xid));
337 } else {
338 snprintf(srcid, sizeof(srcid), "%u", NFS_PORT);
339 snprintf(dstid, sizeof(dstid), "%u",
340 EXTRACT_BE_U_4(&rp->rm_xid));
341 }
342 print_nfsaddr(ndo, bp2, srcid, dstid);
343
344 nfsreply_noaddr_print(ndo, bp, length, bp2);
345 return;
346
347 trunc:
348 if (!nfserr)
349 ND_PRINT((ndo, "%s", tstr));
350 }
351
352 void
353 nfsreply_noaddr_print(netdissect_options *ndo,
354 const u_char *bp, u_int length,
355 const u_char *bp2)
356 {
357 const struct sunrpc_msg *rp;
358 uint32_t proc, vers, reply_stat;
359 enum sunrpc_reject_stat rstat;
360 uint32_t rlow;
361 uint32_t rhigh;
362 enum sunrpc_auth_stat rwhy;
363
364 nfserr = 0; /* assume no error */
365 rp = (const struct sunrpc_msg *)bp;
366
367 ND_TCHECK(rp->rm_reply.rp_stat);
368 reply_stat = EXTRACT_BE_U_4(&rp->rm_reply.rp_stat);
369 switch (reply_stat) {
370
371 case SUNRPC_MSG_ACCEPTED:
372 ND_PRINT((ndo, "reply ok %u", length));
373 if (xid_map_find(rp, bp2, &proc, &vers) >= 0)
374 interp_reply(ndo, rp, proc, vers, length);
375 break;
376
377 case SUNRPC_MSG_DENIED:
378 ND_PRINT((ndo, "reply ERR %u: ", length));
379 ND_TCHECK(rp->rm_reply.rp_reject.rj_stat);
380 rstat = EXTRACT_BE_U_4(&rp->rm_reply.rp_reject.rj_stat);
381 switch (rstat) {
382
383 case SUNRPC_RPC_MISMATCH:
384 ND_TCHECK(rp->rm_reply.rp_reject.rj_vers.high);
385 rlow = EXTRACT_BE_U_4(&rp->rm_reply.rp_reject.rj_vers.low);
386 rhigh = EXTRACT_BE_U_4(&rp->rm_reply.rp_reject.rj_vers.high);
387 ND_PRINT((ndo, "RPC Version mismatch (%u-%u)", rlow, rhigh));
388 break;
389
390 case SUNRPC_AUTH_ERROR:
391 ND_TCHECK(rp->rm_reply.rp_reject.rj_why);
392 rwhy = EXTRACT_BE_U_4(&rp->rm_reply.rp_reject.rj_why);
393 ND_PRINT((ndo, "Auth %s", tok2str(sunrpc_auth_str, "Invalid failure code %u", rwhy)));
394 break;
395
396 default:
397 ND_PRINT((ndo, "Unknown reason for rejecting rpc message %u", (unsigned int)rstat));
398 break;
399 }
400 break;
401
402 default:
403 ND_PRINT((ndo, "reply Unknown rpc response code=%u %u", reply_stat, length));
404 break;
405 }
406 return;
407
408 trunc:
409 if (!nfserr)
410 ND_PRINT((ndo, "%s", tstr));
411 }
412
413 /*
414 * Return a pointer to the first file handle in the packet.
415 * If the packet was truncated, return 0.
416 */
417 static const uint32_t *
418 parsereq(netdissect_options *ndo,
419 const struct sunrpc_msg *rp, u_int length)
420 {
421 const uint32_t *dp;
422 u_int len;
423
424 /*
425 * find the start of the req data (if we captured it)
426 */
427 dp = (const uint32_t *)&rp->rm_call.cb_cred;
428 ND_TCHECK(dp[1]);
429 len = EXTRACT_BE_U_4(dp + 1);
430 if (len < length) {
431 dp += (len + (2 * sizeof(*dp) + 3)) / sizeof(*dp);
432 ND_TCHECK(dp[1]);
433 len = EXTRACT_BE_U_4(dp + 1);
434 if (len < length) {
435 dp += (len + (2 * sizeof(*dp) + 3)) / sizeof(*dp);
436 ND_TCHECK_LEN(dp, 0);
437 return (dp);
438 }
439 }
440 trunc:
441 return (NULL);
442 }
443
444 /*
445 * Print out an NFS file handle and return a pointer to following word.
446 * If packet was truncated, return 0.
447 */
448 static const uint32_t *
449 parsefh(netdissect_options *ndo,
450 const uint32_t *dp, int v3)
451 {
452 u_int len;
453
454 if (v3) {
455 ND_TCHECK(dp[0]);
456 len = EXTRACT_BE_U_4(dp) / 4;
457 dp++;
458 } else
459 len = NFSX_V2FH / 4;
460
461 if (ND_TTEST_LEN(dp, len * sizeof(*dp))) {
462 nfs_printfh(ndo, dp, len);
463 return (dp + len);
464 }
465 trunc:
466 return (NULL);
467 }
468
469 /*
470 * Print out a file name and return pointer to 32-bit word past it.
471 * If packet was truncated, return 0.
472 */
473 static const uint32_t *
474 parsefn(netdissect_options *ndo,
475 const uint32_t *dp)
476 {
477 uint32_t len;
478 const u_char *cp;
479
480 /* Bail if we don't have the string length */
481 ND_TCHECK(*dp);
482
483 /* Fetch big-endian string length */
484 len = EXTRACT_BE_U_4(dp);
485 dp++;
486
487 ND_TCHECK_LEN(dp, ((len + 3) & ~3));
488
489 cp = (const u_char *)dp;
490 /* Update 32-bit pointer (NFS filenames padded to 32-bit boundaries) */
491 dp += ((len + 3) & ~3) / sizeof(*dp);
492 ND_PRINT((ndo, "\""));
493 if (fn_printn(ndo, cp, len, ndo->ndo_snapend)) {
494 ND_PRINT((ndo, "\""));
495 goto trunc;
496 }
497 ND_PRINT((ndo, "\""));
498
499 return (dp);
500 trunc:
501 return NULL;
502 }
503
504 /*
505 * Print out file handle and file name.
506 * Return pointer to 32-bit word past file name.
507 * If packet was truncated (or there was some other error), return 0.
508 */
509 static const uint32_t *
510 parsefhn(netdissect_options *ndo,
511 const uint32_t *dp, int v3)
512 {
513 dp = parsefh(ndo, dp, v3);
514 if (dp == NULL)
515 return (NULL);
516 ND_PRINT((ndo, " "));
517 return (parsefn(ndo, dp));
518 }
519
520 void
521 nfsreq_noaddr_print(netdissect_options *ndo,
522 const u_char *bp, u_int length,
523 const u_char *bp2)
524 {
525 const struct sunrpc_msg *rp;
526 const uint32_t *dp;
527 nfs_type type;
528 int v3;
529 uint32_t proc;
530 uint32_t access_flags;
531 struct nfsv3_sattr sa3;
532
533 ND_PRINT((ndo, "%d", length));
534 nfserr = 0; /* assume no error */
535 rp = (const struct sunrpc_msg *)bp;
536
537 if (!xid_map_enter(ndo, rp, bp2)) /* record proc number for later on */
538 goto trunc;
539
540 v3 = (EXTRACT_BE_U_4(&rp->rm_call.cb_vers) == NFS_VER3);
541 proc = EXTRACT_BE_U_4(&rp->rm_call.cb_proc);
542
543 if (!v3 && proc < NFS_NPROCS)
544 proc = nfsv3_procid[proc];
545
546 ND_PRINT((ndo, " %s", tok2str(nfsproc_str, "proc-%u", proc)));
547 switch (proc) {
548
549 case NFSPROC_GETATTR:
550 case NFSPROC_SETATTR:
551 case NFSPROC_READLINK:
552 case NFSPROC_FSSTAT:
553 case NFSPROC_FSINFO:
554 case NFSPROC_PATHCONF:
555 if ((dp = parsereq(ndo, rp, length)) != NULL &&
556 parsefh(ndo, dp, v3) != NULL)
557 return;
558 break;
559
560 case NFSPROC_LOOKUP:
561 case NFSPROC_CREATE:
562 case NFSPROC_MKDIR:
563 case NFSPROC_REMOVE:
564 case NFSPROC_RMDIR:
565 if ((dp = parsereq(ndo, rp, length)) != NULL &&
566 parsefhn(ndo, dp, v3) != NULL)
567 return;
568 break;
569
570 case NFSPROC_ACCESS:
571 if ((dp = parsereq(ndo, rp, length)) != NULL &&
572 (dp = parsefh(ndo, dp, v3)) != NULL) {
573 ND_TCHECK(dp[0]);
574 access_flags = EXTRACT_BE_U_4(dp);
575 if (access_flags & ~NFSV3ACCESS_FULL) {
576 /* NFSV3ACCESS definitions aren't up to date */
577 ND_PRINT((ndo, " %04x", access_flags));
578 } else if ((access_flags & NFSV3ACCESS_FULL) == NFSV3ACCESS_FULL) {
579 ND_PRINT((ndo, " NFS_ACCESS_FULL"));
580 } else {
581 char separator = ' ';
582 if (access_flags & NFSV3ACCESS_READ) {
583 ND_PRINT((ndo, " NFS_ACCESS_READ"));
584 separator = '|';
585 }
586 if (access_flags & NFSV3ACCESS_LOOKUP) {
587 ND_PRINT((ndo, "%cNFS_ACCESS_LOOKUP", separator));
588 separator = '|';
589 }
590 if (access_flags & NFSV3ACCESS_MODIFY) {
591 ND_PRINT((ndo, "%cNFS_ACCESS_MODIFY", separator));
592 separator = '|';
593 }
594 if (access_flags & NFSV3ACCESS_EXTEND) {
595 ND_PRINT((ndo, "%cNFS_ACCESS_EXTEND", separator));
596 separator = '|';
597 }
598 if (access_flags & NFSV3ACCESS_DELETE) {
599 ND_PRINT((ndo, "%cNFS_ACCESS_DELETE", separator));
600 separator = '|';
601 }
602 if (access_flags & NFSV3ACCESS_EXECUTE)
603 ND_PRINT((ndo, "%cNFS_ACCESS_EXECUTE", separator));
604 }
605 return;
606 }
607 break;
608
609 case NFSPROC_READ:
610 if ((dp = parsereq(ndo, rp, length)) != NULL &&
611 (dp = parsefh(ndo, dp, v3)) != NULL) {
612 if (v3) {
613 ND_TCHECK(dp[2]);
614 ND_PRINT((ndo, " %u bytes @ %" PRIu64,
615 EXTRACT_BE_U_4(dp + 2),
616 EXTRACT_BE_U_8(dp)));
617 } else {
618 ND_TCHECK(dp[1]);
619 ND_PRINT((ndo, " %u bytes @ %u",
620 EXTRACT_BE_U_4(dp + 1),
621 EXTRACT_BE_U_4(dp)));
622 }
623 return;
624 }
625 break;
626
627 case NFSPROC_WRITE:
628 if ((dp = parsereq(ndo, rp, length)) != NULL &&
629 (dp = parsefh(ndo, dp, v3)) != NULL) {
630 if (v3) {
631 ND_TCHECK(dp[4]);
632 ND_PRINT((ndo, " %u (%u) bytes @ %" PRIu64,
633 EXTRACT_BE_U_4(dp + 4),
634 EXTRACT_BE_U_4(dp + 2),
635 EXTRACT_BE_U_8(dp)));
636 if (ndo->ndo_vflag) {
637 ND_PRINT((ndo, " <%s>",
638 tok2str(nfsv3_writemodes,
639 NULL, EXTRACT_BE_U_4(dp + 3))));
640 }
641 } else {
642 ND_TCHECK(dp[3]);
643 ND_PRINT((ndo, " %u (%u) bytes @ %u (%u)",
644 EXTRACT_BE_U_4(dp + 3),
645 EXTRACT_BE_U_4(dp + 2),
646 EXTRACT_BE_U_4(dp + 1),
647 EXTRACT_BE_U_4(dp)));
648 }
649 return;
650 }
651 break;
652
653 case NFSPROC_SYMLINK:
654 if ((dp = parsereq(ndo, rp, length)) != NULL &&
655 (dp = parsefhn(ndo, dp, v3)) != NULL) {
656 ND_PRINT((ndo, " ->"));
657 if (v3 && (dp = parse_sattr3(ndo, dp, &sa3)) == NULL)
658 break;
659 if (parsefn(ndo, dp) == NULL)
660 break;
661 if (v3 && ndo->ndo_vflag)
662 print_sattr3(ndo, &sa3, ndo->ndo_vflag);
663 return;
664 }
665 break;
666
667 case NFSPROC_MKNOD:
668 if ((dp = parsereq(ndo, rp, length)) != NULL &&
669 (dp = parsefhn(ndo, dp, v3)) != NULL) {
670 ND_TCHECK(*dp);
671 type = (nfs_type) EXTRACT_BE_U_4(dp);
672 dp++;
673 if ((dp = parse_sattr3(ndo, dp, &sa3)) == NULL)
674 break;
675 ND_PRINT((ndo, " %s", tok2str(type2str, "unk-ft %d", type)));
676 if (ndo->ndo_vflag && (type == NFCHR || type == NFBLK)) {
677 ND_TCHECK(dp[1]);
678 ND_PRINT((ndo, " %u/%u",
679 EXTRACT_BE_U_4(dp),
680 EXTRACT_BE_U_4(dp + 1)));
681 dp += 2;
682 }
683 if (ndo->ndo_vflag)
684 print_sattr3(ndo, &sa3, ndo->ndo_vflag);
685 return;
686 }
687 break;
688
689 case NFSPROC_RENAME:
690 if ((dp = parsereq(ndo, rp, length)) != NULL &&
691 (dp = parsefhn(ndo, dp, v3)) != NULL) {
692 ND_PRINT((ndo, " ->"));
693 if (parsefhn(ndo, dp, v3) != NULL)
694 return;
695 }
696 break;
697
698 case NFSPROC_LINK:
699 if ((dp = parsereq(ndo, rp, length)) != NULL &&
700 (dp = parsefh(ndo, dp, v3)) != NULL) {
701 ND_PRINT((ndo, " ->"));
702 if (parsefhn(ndo, dp, v3) != NULL)
703 return;
704 }
705 break;
706
707 case NFSPROC_READDIR:
708 if ((dp = parsereq(ndo, rp, length)) != NULL &&
709 (dp = parsefh(ndo, dp, v3)) != NULL) {
710 if (v3) {
711 ND_TCHECK(dp[4]);
712 /*
713 * We shouldn't really try to interpret the
714 * offset cookie here.
715 */
716 ND_PRINT((ndo, " %u bytes @ %" PRId64,
717 EXTRACT_BE_U_4(dp + 4),
718 EXTRACT_BE_U_8(dp)));
719 if (ndo->ndo_vflag)
720 ND_PRINT((ndo, " verf %08x%08x",
721 EXTRACT_BE_U_4(dp + 2),
722 EXTRACT_BE_U_4(dp + 3)));
723 } else {
724 ND_TCHECK(dp[1]);
725 /*
726 * Print the offset as signed, since -1 is
727 * common, but offsets > 2^31 aren't.
728 */
729 ND_PRINT((ndo, " %u bytes @ %d",
730 EXTRACT_BE_U_4(dp + 1),
731 EXTRACT_BE_U_4(dp)));
732 }
733 return;
734 }
735 break;
736
737 case NFSPROC_READDIRPLUS:
738 if ((dp = parsereq(ndo, rp, length)) != NULL &&
739 (dp = parsefh(ndo, dp, v3)) != NULL) {
740 ND_TCHECK(dp[4]);
741 /*
742 * We don't try to interpret the offset
743 * cookie here.
744 */
745 ND_PRINT((ndo, " %u bytes @ %" PRId64,
746 EXTRACT_BE_U_4(dp + 4),
747 EXTRACT_BE_U_8(dp)));
748 if (ndo->ndo_vflag) {
749 ND_TCHECK(dp[5]);
750 ND_PRINT((ndo, " max %u verf %08x%08x",
751 EXTRACT_BE_U_4(dp + 5),
752 EXTRACT_BE_U_4(dp + 2),
753 EXTRACT_BE_U_4(dp + 3)));
754 }
755 return;
756 }
757 break;
758
759 case NFSPROC_COMMIT:
760 if ((dp = parsereq(ndo, rp, length)) != NULL &&
761 (dp = parsefh(ndo, dp, v3)) != NULL) {
762 ND_TCHECK(dp[2]);
763 ND_PRINT((ndo, " %u bytes @ %" PRIu64,
764 EXTRACT_BE_U_4(dp + 2),
765 EXTRACT_BE_U_8(dp)));
766 return;
767 }
768 break;
769
770 default:
771 return;
772 }
773
774 trunc:
775 if (!nfserr)
776 ND_PRINT((ndo, "%s", tstr));
777 }
778
779 /*
780 * Print out an NFS file handle.
781 * We assume packet was not truncated before the end of the
782 * file handle pointed to by dp.
783 *
784 * Note: new version (using portable file-handle parser) doesn't produce
785 * generation number. It probably could be made to do that, with some
786 * additional hacking on the parser code.
787 */
788 static void
789 nfs_printfh(netdissect_options *ndo,
790 const uint32_t *dp, const u_int len)
791 {
792 my_fsid fsid;
793 uint32_t ino;
794 const char *sfsname = NULL;
795 char *spacep;
796
797 if (ndo->ndo_uflag) {
798 u_int i;
799 char const *sep = "";
800
801 ND_PRINT((ndo, " fh["));
802 for (i=0; i<len; i++) {
803 ND_PRINT((ndo, "%s%x", sep, EXTRACT_BE_U_4(dp + i)));
804 sep = ":";
805 }
806 ND_PRINT((ndo, "]"));
807 return;
808 }
809
810 Parse_fh((const u_char *)dp, len, &fsid, &ino, NULL, &sfsname, 0);
811
812 if (sfsname) {
813 /* file system ID is ASCII, not numeric, for this server OS */
814 char temp[NFSX_V3FHMAX+1];
815 u_int stringlen;
816
817 /* Make sure string is null-terminated */
818 stringlen = len;
819 if (stringlen > NFSX_V3FHMAX)
820 stringlen = NFSX_V3FHMAX;
821 strncpy(temp, sfsname, stringlen);
822 temp[stringlen] = '\0';
823 /* Remove trailing spaces */
824 spacep = strchr(temp, ' ');
825 if (spacep)
826 *spacep = '\0';
827
828 ND_PRINT((ndo, " fh %s/", temp));
829 } else {
830 ND_PRINT((ndo, " fh %d,%d/",
831 fsid.Fsid_dev.Major, fsid.Fsid_dev.Minor));
832 }
833
834 if(fsid.Fsid_dev.Minor == 257)
835 /* Print the undecoded handle */
836 ND_PRINT((ndo, "%s", fsid.Opaque_Handle));
837 else
838 ND_PRINT((ndo, "%ld", (long) ino));
839 }
840
841 /*
842 * Maintain a small cache of recent client.XID.server/proc pairs, to allow
843 * us to match up replies with requests and thus to know how to parse
844 * the reply.
845 */
846
847 struct xid_map_entry {
848 uint32_t xid; /* transaction ID (net order) */
849 int ipver; /* IP version (4 or 6) */
850 struct in6_addr client; /* client IP address (net order) */
851 struct in6_addr server; /* server IP address (net order) */
852 uint32_t proc; /* call proc number (host order) */
853 uint32_t vers; /* program version (host order) */
854 };
855
856 /*
857 * Map entries are kept in an array that we manage as a ring;
858 * new entries are always added at the tail of the ring. Initially,
859 * all the entries are zero and hence don't match anything.
860 */
861
862 #define XIDMAPSIZE 64
863
864 static struct xid_map_entry xid_map[XIDMAPSIZE];
865
866 static int xid_map_next = 0;
867 static int xid_map_hint = 0;
868
869 static int
870 xid_map_enter(netdissect_options *ndo,
871 const struct sunrpc_msg *rp, const u_char *bp)
872 {
873 const struct ip *ip = NULL;
874 const struct ip6_hdr *ip6 = NULL;
875 struct xid_map_entry *xmep;
876
877 if (!ND_TTEST(rp->rm_call.cb_proc))
878 return (0);
879 switch (IP_V((const struct ip *)bp)) {
880 case 4:
881 ip = (const struct ip *)bp;
882 break;
883 case 6:
884 ip6 = (const struct ip6_hdr *)bp;
885 break;
886 default:
887 return (1);
888 }
889
890 xmep = &xid_map[xid_map_next];
891
892 if (++xid_map_next >= XIDMAPSIZE)
893 xid_map_next = 0;
894
895 UNALIGNED_MEMCPY(&xmep->xid, &rp->rm_xid, sizeof(xmep->xid));
896 if (ip) {
897 xmep->ipver = 4;
898 UNALIGNED_MEMCPY(&xmep->client, &ip->ip_src, sizeof(ip->ip_src));
899 UNALIGNED_MEMCPY(&xmep->server, &ip->ip_dst, sizeof(ip->ip_dst));
900 }
901 else if (ip6) {
902 xmep->ipver = 6;
903 UNALIGNED_MEMCPY(&xmep->client, &ip6->ip6_src, sizeof(ip6->ip6_src));
904 UNALIGNED_MEMCPY(&xmep->server, &ip6->ip6_dst, sizeof(ip6->ip6_dst));
905 }
906 xmep->proc = EXTRACT_BE_U_4(&rp->rm_call.cb_proc);
907 xmep->vers = EXTRACT_BE_U_4(&rp->rm_call.cb_vers);
908 return (1);
909 }
910
911 /*
912 * Returns 0 and puts NFSPROC_xxx in proc return and
913 * version in vers return, or returns -1 on failure
914 */
915 static int
916 xid_map_find(const struct sunrpc_msg *rp, const u_char *bp, uint32_t *proc,
917 uint32_t *vers)
918 {
919 int i;
920 struct xid_map_entry *xmep;
921 uint32_t xid;
922 const struct ip *ip = (const struct ip *)bp;
923 const struct ip6_hdr *ip6 = (const struct ip6_hdr *)bp;
924 int cmp;
925
926 UNALIGNED_MEMCPY(&xid, &rp->rm_xid, sizeof(xmep->xid));
927 /* Start searching from where we last left off */
928 i = xid_map_hint;
929 do {
930 xmep = &xid_map[i];
931 cmp = 1;
932 if (xmep->ipver != IP_V(ip) || xmep->xid != xid)
933 goto nextitem;
934 switch (xmep->ipver) {
935 case 4:
936 if (UNALIGNED_MEMCMP(&ip->ip_src, &xmep->server,
937 sizeof(ip->ip_src)) != 0 ||
938 UNALIGNED_MEMCMP(&ip->ip_dst, &xmep->client,
939 sizeof(ip->ip_dst)) != 0) {
940 cmp = 0;
941 }
942 break;
943 case 6:
944 if (UNALIGNED_MEMCMP(&ip6->ip6_src, &xmep->server,
945 sizeof(ip6->ip6_src)) != 0 ||
946 UNALIGNED_MEMCMP(&ip6->ip6_dst, &xmep->client,
947 sizeof(ip6->ip6_dst)) != 0) {
948 cmp = 0;
949 }
950 break;
951 default:
952 cmp = 0;
953 break;
954 }
955 if (cmp) {
956 /* match */
957 xid_map_hint = i;
958 *proc = xmep->proc;
959 *vers = xmep->vers;
960 return 0;
961 }
962 nextitem:
963 if (++i >= XIDMAPSIZE)
964 i = 0;
965 } while (i != xid_map_hint);
966
967 /* search failed */
968 return (-1);
969 }
970
971 /*
972 * Routines for parsing reply packets
973 */
974
975 /*
976 * Return a pointer to the beginning of the actual results.
977 * If the packet was truncated, return 0.
978 */
979 static const uint32_t *
980 parserep(netdissect_options *ndo,
981 const struct sunrpc_msg *rp, u_int length)
982 {
983 const uint32_t *dp;
984 u_int len;
985 enum sunrpc_accept_stat astat;
986
987 /*
988 * Portability note:
989 * Here we find the address of the ar_verf credentials.
990 * Originally, this calculation was
991 * dp = (uint32_t *)&rp->rm_reply.rp_acpt.ar_verf
992 * On the wire, the rp_acpt field starts immediately after
993 * the (32 bit) rp_stat field. However, rp_acpt (which is a
994 * "struct accepted_reply") contains a "struct opaque_auth",
995 * whose internal representation contains a pointer, so on a
996 * 64-bit machine the compiler inserts 32 bits of padding
997 * before rp->rm_reply.rp_acpt.ar_verf. So, we cannot use
998 * the internal representation to parse the on-the-wire
999 * representation. Instead, we skip past the rp_stat field,
1000 * which is an "enum" and so occupies one 32-bit word.
1001 */
1002 dp = ((const uint32_t *)&rp->rm_reply) + 1;
1003 ND_TCHECK(dp[1]);
1004 len = EXTRACT_BE_U_4(dp + 1);
1005 if (len >= length)
1006 return (NULL);
1007 /*
1008 * skip past the ar_verf credentials.
1009 */
1010 dp += (len + (2*sizeof(uint32_t) + 3)) / sizeof(uint32_t);
1011
1012 /*
1013 * now we can check the ar_stat field
1014 */
1015 ND_TCHECK(dp[0]);
1016 astat = (enum sunrpc_accept_stat) EXTRACT_BE_U_4(dp);
1017 if (astat != SUNRPC_SUCCESS) {
1018 ND_PRINT((ndo, " %s", tok2str(sunrpc_str, "ar_stat %d", astat)));
1019 nfserr = 1; /* suppress trunc string */
1020 return (NULL);
1021 }
1022 /* successful return */
1023 ND_TCHECK_LEN(dp, sizeof(astat));
1024 return ((const uint32_t *) (sizeof(astat) + ((const char *)dp)));
1025 trunc:
1026 return (0);
1027 }
1028
1029 static const uint32_t *
1030 parsestatus(netdissect_options *ndo,
1031 const uint32_t *dp, int *er)
1032 {
1033 int errnum;
1034
1035 ND_TCHECK(dp[0]);
1036
1037 errnum = EXTRACT_BE_U_4(dp);
1038 if (er)
1039 *er = errnum;
1040 if (errnum != 0) {
1041 if (!ndo->ndo_qflag)
1042 ND_PRINT((ndo, " ERROR: %s",
1043 tok2str(status2str, "unk %d", errnum)));
1044 nfserr = 1;
1045 }
1046 return (dp + 1);
1047 trunc:
1048 return NULL;
1049 }
1050
1051 static const uint32_t *
1052 parsefattr(netdissect_options *ndo,
1053 const uint32_t *dp, int verbose, int v3)
1054 {
1055 const struct nfs_fattr *fap;
1056
1057 fap = (const struct nfs_fattr *)dp;
1058 ND_TCHECK(fap->fa_gid);
1059 if (verbose) {
1060 ND_PRINT((ndo, " %s %o ids %d/%d",
1061 tok2str(type2str, "unk-ft %d ",
1062 EXTRACT_BE_U_4(&fap->fa_type)),
1063 EXTRACT_BE_U_4(&fap->fa_mode),
1064 EXTRACT_BE_U_4(&fap->fa_uid),
1065 EXTRACT_BE_U_4(&fap->fa_gid)));
1066 if (v3) {
1067 ND_TCHECK(fap->fa3_size);
1068 ND_PRINT((ndo, " sz %" PRIu64,
1069 EXTRACT_BE_U_8((const uint32_t *)&fap->fa3_size)));
1070 } else {
1071 ND_TCHECK(fap->fa2_size);
1072 ND_PRINT((ndo, " sz %d", EXTRACT_BE_U_4(&fap->fa2_size)));
1073 }
1074 }
1075 /* print lots more stuff */
1076 if (verbose > 1) {
1077 if (v3) {
1078 ND_TCHECK(fap->fa3_ctime);
1079 ND_PRINT((ndo, " nlink %d rdev %d/%d",
1080 EXTRACT_BE_U_4(&fap->fa_nlink),
1081 EXTRACT_BE_U_4(&fap->fa3_rdev.specdata1),
1082 EXTRACT_BE_U_4(&fap->fa3_rdev.specdata2)));
1083 ND_PRINT((ndo, " fsid %" PRIx64,
1084 EXTRACT_BE_U_8((const uint32_t *)&fap->fa3_fsid)));
1085 ND_PRINT((ndo, " fileid %" PRIx64,
1086 EXTRACT_BE_U_8((const uint32_t *)&fap->fa3_fileid)));
1087 ND_PRINT((ndo, " a/m/ctime %u.%06u",
1088 EXTRACT_BE_U_4(&fap->fa3_atime.nfsv3_sec),
1089 EXTRACT_BE_U_4(&fap->fa3_atime.nfsv3_nsec)));
1090 ND_PRINT((ndo, " %u.%06u",
1091 EXTRACT_BE_U_4(&fap->fa3_mtime.nfsv3_sec),
1092 EXTRACT_BE_U_4(&fap->fa3_mtime.nfsv3_nsec)));
1093 ND_PRINT((ndo, " %u.%06u",
1094 EXTRACT_BE_U_4(&fap->fa3_ctime.nfsv3_sec),
1095 EXTRACT_BE_U_4(&fap->fa3_ctime.nfsv3_nsec)));
1096 } else {
1097 ND_TCHECK(fap->fa2_ctime);
1098 ND_PRINT((ndo, " nlink %d rdev 0x%x fsid 0x%x nodeid 0x%x a/m/ctime",
1099 EXTRACT_BE_U_4(&fap->fa_nlink),
1100 EXTRACT_BE_U_4(&fap->fa2_rdev),
1101 EXTRACT_BE_U_4(&fap->fa2_fsid),
1102 EXTRACT_BE_U_4(&fap->fa2_fileid)));
1103 ND_PRINT((ndo, " %u.%06u",
1104 EXTRACT_BE_U_4(&fap->fa2_atime.nfsv2_sec),
1105 EXTRACT_BE_U_4(&fap->fa2_atime.nfsv2_usec)));
1106 ND_PRINT((ndo, " %u.%06u",
1107 EXTRACT_BE_U_4(&fap->fa2_mtime.nfsv2_sec),
1108 EXTRACT_BE_U_4(&fap->fa2_mtime.nfsv2_usec)));
1109 ND_PRINT((ndo, " %u.%06u",
1110 EXTRACT_BE_U_4(&fap->fa2_ctime.nfsv2_sec),
1111 EXTRACT_BE_U_4(&fap->fa2_ctime.nfsv2_usec)));
1112 }
1113 }
1114 return ((const uint32_t *)((const unsigned char *)dp +
1115 (v3 ? NFSX_V3FATTR : NFSX_V2FATTR)));
1116 trunc:
1117 return (NULL);
1118 }
1119
1120 static int
1121 parseattrstat(netdissect_options *ndo,
1122 const uint32_t *dp, int verbose, int v3)
1123 {
1124 int er;
1125
1126 dp = parsestatus(ndo, dp, &er);
1127 if (dp == NULL)
1128 return (0);
1129 if (er)
1130 return (1);
1131
1132 return (parsefattr(ndo, dp, verbose, v3) != NULL);
1133 }
1134
1135 static int
1136 parsediropres(netdissect_options *ndo,
1137 const uint32_t *dp)
1138 {
1139 int er;
1140
1141 if (!(dp = parsestatus(ndo, dp, &er)))
1142 return (0);
1143 if (er)
1144 return (1);
1145
1146 dp = parsefh(ndo, dp, 0);
1147 if (dp == NULL)
1148 return (0);
1149
1150 return (parsefattr(ndo, dp, ndo->ndo_vflag, 0) != NULL);
1151 }
1152
1153 static int
1154 parselinkres(netdissect_options *ndo,
1155 const uint32_t *dp, int v3)
1156 {
1157 int er;
1158
1159 dp = parsestatus(ndo, dp, &er);
1160 if (dp == NULL)
1161 return(0);
1162 if (er)
1163 return(1);
1164 if (v3 && !(dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag)))
1165 return (0);
1166 ND_PRINT((ndo, " "));
1167 return (parsefn(ndo, dp) != NULL);
1168 }
1169
1170 static int
1171 parsestatfs(netdissect_options *ndo,
1172 const uint32_t *dp, int v3)
1173 {
1174 const struct nfs_statfs *sfsp;
1175 int er;
1176
1177 dp = parsestatus(ndo, dp, &er);
1178 if (dp == NULL)
1179 return (0);
1180 if (!v3 && er)
1181 return (1);
1182
1183 if (ndo->ndo_qflag)
1184 return(1);
1185
1186 if (v3) {
1187 if (ndo->ndo_vflag)
1188 ND_PRINT((ndo, " POST:"));
1189 if (!(dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag)))
1190 return (0);
1191 }
1192
1193 ND_TCHECK_LEN(dp, (v3 ? NFSX_V3STATFS : NFSX_V2STATFS));
1194
1195 sfsp = (const struct nfs_statfs *)dp;
1196
1197 if (v3) {
1198 ND_PRINT((ndo, " tbytes %" PRIu64 " fbytes %" PRIu64 " abytes %" PRIu64,
1199 EXTRACT_BE_U_8((const uint32_t *)&sfsp->sf_tbytes),
1200 EXTRACT_BE_U_8((const uint32_t *)&sfsp->sf_fbytes),
1201 EXTRACT_BE_U_8((const uint32_t *)&sfsp->sf_abytes)));
1202 if (ndo->ndo_vflag) {
1203 ND_PRINT((ndo, " tfiles %" PRIu64 " ffiles %" PRIu64 " afiles %" PRIu64 " invar %u",
1204 EXTRACT_BE_U_8((const uint32_t *)&sfsp->sf_tfiles),
1205 EXTRACT_BE_U_8((const uint32_t *)&sfsp->sf_ffiles),
1206 EXTRACT_BE_U_8((const uint32_t *)&sfsp->sf_afiles),
1207 EXTRACT_BE_U_4(&sfsp->sf_invarsec)));
1208 }
1209 } else {
1210 ND_PRINT((ndo, " tsize %d bsize %d blocks %d bfree %d bavail %d",
1211 EXTRACT_BE_U_4(&sfsp->sf_tsize),
1212 EXTRACT_BE_U_4(&sfsp->sf_bsize),
1213 EXTRACT_BE_U_4(&sfsp->sf_blocks),
1214 EXTRACT_BE_U_4(&sfsp->sf_bfree),
1215 EXTRACT_BE_U_4(&sfsp->sf_bavail)));
1216 }
1217
1218 return (1);
1219 trunc:
1220 return (0);
1221 }
1222
1223 static int
1224 parserddires(netdissect_options *ndo,
1225 const uint32_t *dp)
1226 {
1227 int er;
1228
1229 dp = parsestatus(ndo, dp, &er);
1230 if (dp == NULL)
1231 return (0);
1232 if (er)
1233 return (1);
1234 if (ndo->ndo_qflag)
1235 return (1);
1236
1237 ND_TCHECK(dp[2]);
1238 ND_PRINT((ndo, " offset 0x%x size %d ",
1239 EXTRACT_BE_U_4(dp), EXTRACT_BE_U_4(dp + 1)));
1240 if (EXTRACT_BE_U_4(dp + 2) != 0)
1241 ND_PRINT((ndo, " eof"));
1242
1243 return (1);
1244 trunc:
1245 return (0);
1246 }
1247
1248 static const uint32_t *
1249 parse_wcc_attr(netdissect_options *ndo,
1250 const uint32_t *dp)
1251 {
1252 /* Our caller has already checked this */
1253 ND_PRINT((ndo, " sz %" PRIu64, EXTRACT_BE_U_8(dp)));
1254 ND_PRINT((ndo, " mtime %u.%06u ctime %u.%06u",
1255 EXTRACT_BE_U_4(dp + 2), EXTRACT_BE_U_4(dp + 3),
1256 EXTRACT_BE_U_4(dp + 4), EXTRACT_BE_U_4(dp + 5)));
1257 return (dp + 6);
1258 }
1259
1260 /*
1261 * Pre operation attributes. Print only if vflag > 1.
1262 */
1263 static const uint32_t *
1264 parse_pre_op_attr(netdissect_options *ndo,
1265 const uint32_t *dp, int verbose)
1266 {
1267 ND_TCHECK(dp[0]);
1268 if (!EXTRACT_BE_U_4(dp))
1269 return (dp + 1);
1270 dp++;
1271 ND_TCHECK_LEN(dp, 24);
1272 if (verbose > 1) {
1273 return parse_wcc_attr(ndo, dp);
1274 } else {
1275 /* If not verbose enough, just skip over wcc_attr */
1276 return (dp + 6);
1277 }
1278 trunc:
1279 return (NULL);
1280 }
1281
1282 /*
1283 * Post operation attributes are printed if vflag >= 1
1284 */
1285 static const uint32_t *
1286 parse_post_op_attr(netdissect_options *ndo,
1287 const uint32_t *dp, int verbose)
1288 {
1289 ND_TCHECK(dp[0]);
1290 if (!EXTRACT_BE_U_4(dp))
1291 return (dp + 1);
1292 dp++;
1293 if (verbose) {
1294 return parsefattr(ndo, dp, verbose, 1);
1295 } else
1296 return (dp + (NFSX_V3FATTR / sizeof (uint32_t)));
1297 trunc:
1298 return (NULL);
1299 }
1300
1301 static const uint32_t *
1302 parse_wcc_data(netdissect_options *ndo,
1303 const uint32_t *dp, int verbose)
1304 {
1305 if (verbose > 1)
1306 ND_PRINT((ndo, " PRE:"));
1307 if (!(dp = parse_pre_op_attr(ndo, dp, verbose)))
1308 return (0);
1309
1310 if (verbose)
1311 ND_PRINT((ndo, " POST:"));
1312 return parse_post_op_attr(ndo, dp, verbose);
1313 }
1314
1315 static const uint32_t *
1316 parsecreateopres(netdissect_options *ndo,
1317 const uint32_t *dp, int verbose)
1318 {
1319 int er;
1320
1321 if (!(dp = parsestatus(ndo, dp, &er)))
1322 return (0);
1323 if (er)
1324 dp = parse_wcc_data(ndo, dp, verbose);
1325 else {
1326 ND_TCHECK(dp[0]);
1327 if (!EXTRACT_BE_U_4(dp))
1328 return (dp + 1);
1329 dp++;
1330 if (!(dp = parsefh(ndo, dp, 1)))
1331 return (0);
1332 if (verbose) {
1333 if (!(dp = parse_post_op_attr(ndo, dp, verbose)))
1334 return (0);
1335 if (ndo->ndo_vflag > 1) {
1336 ND_PRINT((ndo, " dir attr:"));
1337 dp = parse_wcc_data(ndo, dp, verbose);
1338 }
1339 }
1340 }
1341 return (dp);
1342 trunc:
1343 return (NULL);
1344 }
1345
1346 static int
1347 parsewccres(netdissect_options *ndo,
1348 const uint32_t *dp, int verbose)
1349 {
1350 int er;
1351
1352 if (!(dp = parsestatus(ndo, dp, &er)))
1353 return (0);
1354 return parse_wcc_data(ndo, dp, verbose) != NULL;
1355 }
1356
1357 static const uint32_t *
1358 parsev3rddirres(netdissect_options *ndo,
1359 const uint32_t *dp, int verbose)
1360 {
1361 int er;
1362
1363 if (!(dp = parsestatus(ndo, dp, &er)))
1364 return (0);
1365 if (ndo->ndo_vflag)
1366 ND_PRINT((ndo, " POST:"));
1367 if (!(dp = parse_post_op_attr(ndo, dp, verbose)))
1368 return (0);
1369 if (er)
1370 return dp;
1371 if (ndo->ndo_vflag) {
1372 ND_TCHECK(dp[1]);
1373 ND_PRINT((ndo, " verf %08x%08x",
1374 EXTRACT_BE_U_4(dp), EXTRACT_BE_U_4(dp + 1)));
1375 dp += 2;
1376 }
1377 return dp;
1378 trunc:
1379 return (NULL);
1380 }
1381
1382 static int
1383 parsefsinfo(netdissect_options *ndo,
1384 const uint32_t *dp)
1385 {
1386 const struct nfsv3_fsinfo *sfp;
1387 int er;
1388
1389 if (!(dp = parsestatus(ndo, dp, &er)))
1390 return (0);
1391 if (ndo->ndo_vflag)
1392 ND_PRINT((ndo, " POST:"));
1393 if (!(dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag)))
1394 return (0);
1395 if (er)
1396 return (1);
1397
1398 sfp = (const struct nfsv3_fsinfo *)dp;
1399 ND_TCHECK(*sfp);
1400 ND_PRINT((ndo, " rtmax %u rtpref %u wtmax %u wtpref %u dtpref %u",
1401 EXTRACT_BE_U_4(&sfp->fs_rtmax),
1402 EXTRACT_BE_U_4(&sfp->fs_rtpref),
1403 EXTRACT_BE_U_4(&sfp->fs_wtmax),
1404 EXTRACT_BE_U_4(&sfp->fs_wtpref),
1405 EXTRACT_BE_U_4(&sfp->fs_dtpref)));
1406 if (ndo->ndo_vflag) {
1407 ND_PRINT((ndo, " rtmult %u wtmult %u maxfsz %" PRIu64,
1408 EXTRACT_BE_U_4(&sfp->fs_rtmult),
1409 EXTRACT_BE_U_4(&sfp->fs_wtmult),
1410 EXTRACT_BE_U_8((const uint32_t *)&sfp->fs_maxfilesize)));
1411 ND_PRINT((ndo, " delta %u.%06u ",
1412 EXTRACT_BE_U_4(&sfp->fs_timedelta.nfsv3_sec),
1413 EXTRACT_BE_U_4(&sfp->fs_timedelta.nfsv3_nsec)));
1414 }
1415 return (1);
1416 trunc:
1417 return (0);
1418 }
1419
1420 static int
1421 parsepathconf(netdissect_options *ndo,
1422 const uint32_t *dp)
1423 {
1424 int er;
1425 const struct nfsv3_pathconf *spp;
1426
1427 if (!(dp = parsestatus(ndo, dp, &er)))
1428 return (0);
1429 if (ndo->ndo_vflag)
1430 ND_PRINT((ndo, " POST:"));
1431 if (!(dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag)))
1432 return (0);
1433 if (er)
1434 return (1);
1435
1436 spp = (const struct nfsv3_pathconf *)dp;
1437 ND_TCHECK(*spp);
1438
1439 ND_PRINT((ndo, " linkmax %u namemax %u %s %s %s %s",
1440 EXTRACT_BE_U_4(&spp->pc_linkmax),
1441 EXTRACT_BE_U_4(&spp->pc_namemax),
1442 EXTRACT_BE_U_4(&spp->pc_notrunc) ? "notrunc" : "",
1443 EXTRACT_BE_U_4(&spp->pc_chownrestricted) ? "chownres" : "",
1444 EXTRACT_BE_U_4(&spp->pc_caseinsensitive) ? "igncase" : "",
1445 EXTRACT_BE_U_4(&spp->pc_casepreserving) ? "keepcase" : ""));
1446 return (1);
1447 trunc:
1448 return (0);
1449 }
1450
1451 static void
1452 interp_reply(netdissect_options *ndo,
1453 const struct sunrpc_msg *rp, uint32_t proc, uint32_t vers, int length)
1454 {
1455 const uint32_t *dp;
1456 int v3;
1457 int er;
1458
1459 v3 = (vers == NFS_VER3);
1460
1461 if (!v3 && proc < NFS_NPROCS)
1462 proc = nfsv3_procid[proc];
1463
1464 ND_PRINT((ndo, " %s", tok2str(nfsproc_str, "proc-%u", proc)));
1465 switch (proc) {
1466
1467 case NFSPROC_GETATTR:
1468 dp = parserep(ndo, rp, length);
1469 if (dp != NULL && parseattrstat(ndo, dp, !ndo->ndo_qflag, v3) != 0)
1470 return;
1471 break;
1472
1473 case NFSPROC_SETATTR:
1474 if (!(dp = parserep(ndo, rp, length)))
1475 return;
1476 if (v3) {
1477 if (parsewccres(ndo, dp, ndo->ndo_vflag))
1478 return;
1479 } else {
1480 if (parseattrstat(ndo, dp, !ndo->ndo_qflag, 0) != 0)
1481 return;
1482 }
1483 break;
1484
1485 case NFSPROC_LOOKUP:
1486 if (!(dp = parserep(ndo, rp, length)))
1487 break;
1488 if (v3) {
1489 if (!(dp = parsestatus(ndo, dp, &er)))
1490 break;
1491 if (er) {
1492 if (ndo->ndo_vflag > 1) {
1493 ND_PRINT((ndo, " post dattr:"));
1494 dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
1495 }
1496 } else {
1497 if (!(dp = parsefh(ndo, dp, v3)))
1498 break;
1499 if ((dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag)) &&
1500 ndo->ndo_vflag > 1) {
1501 ND_PRINT((ndo, " post dattr:"));
1502 dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
1503 }
1504 }
1505 if (dp)
1506 return;
1507 } else {
1508 if (parsediropres(ndo, dp) != 0)
1509 return;
1510 }
1511 break;
1512
1513 case NFSPROC_ACCESS:
1514 if (!(dp = parserep(ndo, rp, length)))
1515 break;
1516 if (!(dp = parsestatus(ndo, dp, &er)))
1517 break;
1518 if (ndo->ndo_vflag)
1519 ND_PRINT((ndo, " attr:"));
1520 if (!(dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag)))
1521 break;
1522 if (!er) {
1523 ND_TCHECK(dp[0]);
1524 ND_PRINT((ndo, " c %04x", EXTRACT_BE_U_4(dp)));
1525 }
1526 return;
1527
1528 case NFSPROC_READLINK:
1529 dp = parserep(ndo, rp, length);
1530 if (dp != NULL && parselinkres(ndo, dp, v3) != 0)
1531 return;
1532 break;
1533
1534 case NFSPROC_READ:
1535 if (!(dp = parserep(ndo, rp, length)))
1536 break;
1537 if (v3) {
1538 if (!(dp = parsestatus(ndo, dp, &er)))
1539 break;
1540 if (!(dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag)))
1541 break;
1542 if (er)
1543 return;
1544 if (ndo->ndo_vflag) {
1545 ND_TCHECK(dp[1]);
1546 ND_PRINT((ndo, " %u bytes", EXTRACT_BE_U_4(dp)));
1547 if (EXTRACT_BE_U_4(dp + 1))
1548 ND_PRINT((ndo, " EOF"));
1549 }
1550 return;
1551 } else {
1552 if (parseattrstat(ndo, dp, ndo->ndo_vflag, 0) != 0)
1553 return;
1554 }
1555 break;
1556
1557 case NFSPROC_WRITE:
1558 if (!(dp = parserep(ndo, rp, length)))
1559 break;
1560 if (v3) {
1561 if (!(dp = parsestatus(ndo, dp, &er)))
1562 break;
1563 if (!(dp = parse_wcc_data(ndo, dp, ndo->ndo_vflag)))
1564 break;
1565 if (er)
1566 return;
1567 if (ndo->ndo_vflag) {
1568 ND_TCHECK(dp[0]);
1569 ND_PRINT((ndo, " %u bytes", EXTRACT_BE_U_4(dp)));
1570 if (ndo->ndo_vflag > 1) {
1571 ND_TCHECK(dp[1]);
1572 ND_PRINT((ndo, " <%s>",
1573 tok2str(nfsv3_writemodes,
1574 NULL, EXTRACT_BE_U_4(dp + 1))));
1575 }
1576 return;
1577 }
1578 } else {
1579 if (parseattrstat(ndo, dp, ndo->ndo_vflag, v3) != 0)
1580 return;
1581 }
1582 break;
1583
1584 case NFSPROC_CREATE:
1585 case NFSPROC_MKDIR:
1586 if (!(dp = parserep(ndo, rp, length)))
1587 break;
1588 if (v3) {
1589 if (parsecreateopres(ndo, dp, ndo->ndo_vflag) != NULL)
1590 return;
1591 } else {
1592 if (parsediropres(ndo, dp) != 0)
1593 return;
1594 }
1595 break;
1596
1597 case NFSPROC_SYMLINK:
1598 if (!(dp = parserep(ndo, rp, length)))
1599 break;
1600 if (v3) {
1601 if (parsecreateopres(ndo, dp, ndo->ndo_vflag) != NULL)
1602 return;
1603 } else {
1604 if (parsestatus(ndo, dp, &er) != NULL)
1605 return;
1606 }
1607 break;
1608
1609 case NFSPROC_MKNOD:
1610 if (!(dp = parserep(ndo, rp, length)))
1611 break;
1612 if (parsecreateopres(ndo, dp, ndo->ndo_vflag) != NULL)
1613 return;
1614 break;
1615
1616 case NFSPROC_REMOVE:
1617 case NFSPROC_RMDIR:
1618 if (!(dp = parserep(ndo, rp, length)))
1619 break;
1620 if (v3) {
1621 if (parsewccres(ndo, dp, ndo->ndo_vflag))
1622 return;
1623 } else {
1624 if (parsestatus(ndo, dp, &er) != NULL)
1625 return;
1626 }
1627 break;
1628
1629 case NFSPROC_RENAME:
1630 if (!(dp = parserep(ndo, rp, length)))
1631 break;
1632 if (v3) {
1633 if (!(dp = parsestatus(ndo, dp, &er)))
1634 break;
1635 if (ndo->ndo_vflag) {
1636 ND_PRINT((ndo, " from:"));
1637 if (!(dp = parse_wcc_data(ndo, dp, ndo->ndo_vflag)))
1638 break;
1639 ND_PRINT((ndo, " to:"));
1640 if (!(dp = parse_wcc_data(ndo, dp, ndo->ndo_vflag)))
1641 break;
1642 }
1643 return;
1644 } else {
1645 if (parsestatus(ndo, dp, &er) != NULL)
1646 return;
1647 }
1648 break;
1649
1650 case NFSPROC_LINK:
1651 if (!(dp = parserep(ndo, rp, length)))
1652 break;
1653 if (v3) {
1654 if (!(dp = parsestatus(ndo, dp, &er)))
1655 break;
1656 if (ndo->ndo_vflag) {
1657 ND_PRINT((ndo, " file POST:"));
1658 if (!(dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag)))
1659 break;
1660 ND_PRINT((ndo, " dir:"));
1661 if (!(dp = parse_wcc_data(ndo, dp, ndo->ndo_vflag)))
1662 break;
1663 return;
1664 }
1665 } else {
1666 if (parsestatus(ndo, dp, &er) != NULL)
1667 return;
1668 }
1669 break;
1670
1671 case NFSPROC_READDIR:
1672 if (!(dp = parserep(ndo, rp, length)))
1673 break;
1674 if (v3) {
1675 if (parsev3rddirres(ndo, dp, ndo->ndo_vflag))
1676 return;
1677 } else {
1678 if (parserddires(ndo, dp) != 0)
1679 return;
1680 }
1681 break;
1682
1683 case NFSPROC_READDIRPLUS:
1684 if (!(dp = parserep(ndo, rp, length)))
1685 break;
1686 if (parsev3rddirres(ndo, dp, ndo->ndo_vflag))
1687 return;
1688 break;
1689
1690 case NFSPROC_FSSTAT:
1691 dp = parserep(ndo, rp, length);
1692 if (dp != NULL && parsestatfs(ndo, dp, v3) != 0)
1693 return;
1694 break;
1695
1696 case NFSPROC_FSINFO:
1697 dp = parserep(ndo, rp, length);
1698 if (dp != NULL && parsefsinfo(ndo, dp) != 0)
1699 return;
1700 break;
1701
1702 case NFSPROC_PATHCONF:
1703 dp = parserep(ndo, rp, length);
1704 if (dp != NULL && parsepathconf(ndo, dp) != 0)
1705 return;
1706 break;
1707
1708 case NFSPROC_COMMIT:
1709 dp = parserep(ndo, rp, length);
1710 if (dp != NULL && parsewccres(ndo, dp, ndo->ndo_vflag) != 0)
1711 return;
1712 break;
1713
1714 default:
1715 return;
1716 }
1717 trunc:
1718 if (!nfserr)
1719 ND_PRINT((ndo, "%s", tstr));
1720 }
[mirror] the TCPdump network dissector