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[tcpdump] / print-nfs.c
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 #include <config.h>
25
26 #include "netdissect-stdinc.h"
27
28 #include <stdio.h>
29 #include <string.h>
30 #include <limits.h>
31
32 #include "netdissect.h"
33 #include "addrtoname.h"
34 #include "extract.h"
35
36 #include "nfs.h"
37 #include "nfsfh.h"
38
39 #include "ip.h"
40 #include "ip6.h"
41 #include "rpc_auth.h"
42 #include "rpc_msg.h"
43
44
45 static void nfs_printfh(netdissect_options *, const uint32_t *, const u_int);
46 static int xid_map_enter(netdissect_options *, const struct sunrpc_msg *, const u_char *);
47 static int xid_map_find(netdissect_options *, const struct sunrpc_msg *, const u_char *, uint32_t *, uint32_t *);
48 static void interp_reply(netdissect_options *, const struct sunrpc_msg *, uint32_t, uint32_t, int);
49 static const uint32_t *parse_post_op_attr(netdissect_options *, const uint32_t *, int);
50
51 /*
52 * Mapping of old NFS Version 2 RPC numbers to generic numbers.
53 */
54 static uint32_t nfsv3_procid[NFS_NPROCS] = {
55 NFSPROC_NULL,
56 NFSPROC_GETATTR,
57 NFSPROC_SETATTR,
58 NFSPROC_NOOP,
59 NFSPROC_LOOKUP,
60 NFSPROC_READLINK,
61 NFSPROC_READ,
62 NFSPROC_NOOP,
63 NFSPROC_WRITE,
64 NFSPROC_CREATE,
65 NFSPROC_REMOVE,
66 NFSPROC_RENAME,
67 NFSPROC_LINK,
68 NFSPROC_SYMLINK,
69 NFSPROC_MKDIR,
70 NFSPROC_RMDIR,
71 NFSPROC_READDIR,
72 NFSPROC_FSSTAT,
73 NFSPROC_NOOP,
74 NFSPROC_NOOP,
75 NFSPROC_NOOP,
76 NFSPROC_NOOP,
77 NFSPROC_NOOP,
78 NFSPROC_NOOP,
79 NFSPROC_NOOP,
80 NFSPROC_NOOP
81 };
82
83 static const struct tok nfsproc_str[] = {
84 { NFSPROC_NOOP, "nop" },
85 { NFSPROC_NULL, "null" },
86 { NFSPROC_GETATTR, "getattr" },
87 { NFSPROC_SETATTR, "setattr" },
88 { NFSPROC_LOOKUP, "lookup" },
89 { NFSPROC_ACCESS, "access" },
90 { NFSPROC_READLINK, "readlink" },
91 { NFSPROC_READ, "read" },
92 { NFSPROC_WRITE, "write" },
93 { NFSPROC_CREATE, "create" },
94 { NFSPROC_MKDIR, "mkdir" },
95 { NFSPROC_SYMLINK, "symlink" },
96 { NFSPROC_MKNOD, "mknod" },
97 { NFSPROC_REMOVE, "remove" },
98 { NFSPROC_RMDIR, "rmdir" },
99 { NFSPROC_RENAME, "rename" },
100 { NFSPROC_LINK, "link" },
101 { NFSPROC_READDIR, "readdir" },
102 { NFSPROC_READDIRPLUS, "readdirplus" },
103 { NFSPROC_FSSTAT, "fsstat" },
104 { NFSPROC_FSINFO, "fsinfo" },
105 { NFSPROC_PATHCONF, "pathconf" },
106 { NFSPROC_COMMIT, "commit" },
107 { 0, NULL }
108 };
109
110 /*
111 * NFS V2 and V3 status values.
112 *
113 * Some of these come from the RFCs for NFS V2 and V3, with the message
114 * strings taken from the FreeBSD C library "errlst.c".
115 *
116 * Others are errors that are not in the RFC but that I suspect some
117 * NFS servers could return; the values are FreeBSD errno values, as
118 * the first NFS server was the SunOS 2.0 one, and until 5.0 SunOS
119 * was primarily BSD-derived.
120 */
121 static const struct tok status2str[] = {
122 { 1, "Operation not permitted" }, /* EPERM */
123 { 2, "No such file or directory" }, /* ENOENT */
124 { 5, "Input/output error" }, /* EIO */
125 { 6, "Device not configured" }, /* ENXIO */
126 { 11, "Resource deadlock avoided" }, /* EDEADLK */
127 { 12, "Cannot allocate memory" }, /* ENOMEM */
128 { 13, "Permission denied" }, /* EACCES */
129 { 17, "File exists" }, /* EEXIST */
130 { 18, "Cross-device link" }, /* EXDEV */
131 { 19, "Operation not supported by device" }, /* ENODEV */
132 { 20, "Not a directory" }, /* ENOTDIR */
133 { 21, "Is a directory" }, /* EISDIR */
134 { 22, "Invalid argument" }, /* EINVAL */
135 { 26, "Text file busy" }, /* ETXTBSY */
136 { 27, "File too large" }, /* EFBIG */
137 { 28, "No space left on device" }, /* ENOSPC */
138 { 30, "Read-only file system" }, /* EROFS */
139 { 31, "Too many links" }, /* EMLINK */
140 { 45, "Operation not supported" }, /* EOPNOTSUPP */
141 { 62, "Too many levels of symbolic links" }, /* ELOOP */
142 { 63, "File name too long" }, /* ENAMETOOLONG */
143 { 66, "Directory not empty" }, /* ENOTEMPTY */
144 { 69, "Disc quota exceeded" }, /* EDQUOT */
145 { 70, "Stale NFS file handle" }, /* ESTALE */
146 { 71, "Too many levels of remote in path" }, /* EREMOTE */
147 { 99, "Write cache flushed to disk" }, /* NFSERR_WFLUSH (not used) */
148 { 10001, "Illegal NFS file handle" }, /* NFS3ERR_BADHANDLE */
149 { 10002, "Update synchronization mismatch" }, /* NFS3ERR_NOT_SYNC */
150 { 10003, "READDIR/READDIRPLUS cookie is stale" }, /* NFS3ERR_BAD_COOKIE */
151 { 10004, "Operation not supported" }, /* NFS3ERR_NOTSUPP */
152 { 10005, "Buffer or request is too small" }, /* NFS3ERR_TOOSMALL */
153 { 10006, "Unspecified error on server" }, /* NFS3ERR_SERVERFAULT */
154 { 10007, "Object of that type not supported" }, /* NFS3ERR_BADTYPE */
155 { 10008, "Request couldn't be completed in time" }, /* NFS3ERR_JUKEBOX */
156 { 0, NULL }
157 };
158
159 static const struct tok nfsv3_writemodes[] = {
160 { 0, "unstable" },
161 { 1, "datasync" },
162 { 2, "filesync" },
163 { 0, NULL }
164 };
165
166 static const struct tok type2str[] = {
167 { NFNON, "NON" },
168 { NFREG, "REG" },
169 { NFDIR, "DIR" },
170 { NFBLK, "BLK" },
171 { NFCHR, "CHR" },
172 { NFLNK, "LNK" },
173 { NFFIFO, "FIFO" },
174 { 0, NULL }
175 };
176
177 static const struct tok sunrpc_auth_str[] = {
178 { SUNRPC_AUTH_OK, "OK" },
179 { SUNRPC_AUTH_BADCRED, "Bogus Credentials (seal broken)" },
180 { SUNRPC_AUTH_REJECTEDCRED, "Rejected Credentials (client should begin new session)" },
181 { SUNRPC_AUTH_BADVERF, "Bogus Verifier (seal broken)" },
182 { SUNRPC_AUTH_REJECTEDVERF, "Verifier expired or was replayed" },
183 { SUNRPC_AUTH_TOOWEAK, "Credentials are too weak" },
184 { SUNRPC_AUTH_INVALIDRESP, "Bogus response verifier" },
185 { SUNRPC_AUTH_FAILED, "Unknown failure" },
186 { 0, NULL }
187 };
188
189 static const struct tok sunrpc_str[] = {
190 { SUNRPC_PROG_UNAVAIL, "PROG_UNAVAIL" },
191 { SUNRPC_PROG_MISMATCH, "PROG_MISMATCH" },
192 { SUNRPC_PROC_UNAVAIL, "PROC_UNAVAIL" },
193 { SUNRPC_GARBAGE_ARGS, "GARBAGE_ARGS" },
194 { SUNRPC_SYSTEM_ERR, "SYSTEM_ERR" },
195 { 0, NULL }
196 };
197
198 static void
199 nfsaddr_print(netdissect_options *ndo,
200 const u_char *bp, const char *s, const char *d)
201 {
202 const struct ip *ip;
203 const struct ip6_hdr *ip6;
204 char srcaddr[INET6_ADDRSTRLEN], dstaddr[INET6_ADDRSTRLEN];
205
206 srcaddr[0] = dstaddr[0] = '\0';
207 switch (IP_V((const struct ip *)bp)) {
208 case 4:
209 ip = (const struct ip *)bp;
210 strlcpy(srcaddr, GET_IPADDR_STRING(ip->ip_src), sizeof(srcaddr));
211 strlcpy(dstaddr, GET_IPADDR_STRING(ip->ip_dst), sizeof(dstaddr));
212 break;
213 case 6:
214 ip6 = (const struct ip6_hdr *)bp;
215 strlcpy(srcaddr, GET_IP6ADDR_STRING(ip6->ip6_src),
216 sizeof(srcaddr));
217 strlcpy(dstaddr, GET_IP6ADDR_STRING(ip6->ip6_dst),
218 sizeof(dstaddr));
219 break;
220 default:
221 strlcpy(srcaddr, "?", sizeof(srcaddr));
222 strlcpy(dstaddr, "?", sizeof(dstaddr));
223 break;
224 }
225
226 ND_PRINT("%s.%s > %s.%s: ", srcaddr, s, dstaddr, d);
227 }
228
229 /*
230 * NFS Version 3 sattr3 structure for the new node creation case.
231 * This does not have a fixed layout on the network, so this
232 * structure does not correspond to the layout of the data on
233 * the network; it's used to store the data when the sattr3
234 * is parsed for use when it's later printed.
235 */
236 struct nfsv3_sattr {
237 uint32_t sa_modeset;
238 uint32_t sa_mode;
239 uint32_t sa_uidset;
240 uint32_t sa_uid;
241 uint32_t sa_gidset;
242 uint32_t sa_gid;
243 uint32_t sa_sizeset;
244 uint32_t sa_size;
245 uint32_t sa_atimetype;
246 struct {
247 uint32_t nfsv3_sec;
248 uint32_t nfsv3_nsec;
249 } sa_atime;
250 uint32_t sa_mtimetype;
251 struct {
252 uint32_t nfsv3_sec;
253 uint32_t nfsv3_nsec;
254 } sa_mtime;
255 };
256
257 static const uint32_t *
258 parse_sattr3(netdissect_options *ndo,
259 const uint32_t *dp, struct nfsv3_sattr *sa3)
260 {
261 sa3->sa_modeset = GET_BE_U_4(dp);
262 dp++;
263 if (sa3->sa_modeset) {
264 sa3->sa_mode = GET_BE_U_4(dp);
265 dp++;
266 }
267
268 sa3->sa_uidset = GET_BE_U_4(dp);
269 dp++;
270 if (sa3->sa_uidset) {
271 sa3->sa_uid = GET_BE_U_4(dp);
272 dp++;
273 }
274
275 sa3->sa_gidset = GET_BE_U_4(dp);
276 dp++;
277 if (sa3->sa_gidset) {
278 sa3->sa_gid = GET_BE_U_4(dp);
279 dp++;
280 }
281
282 sa3->sa_sizeset = GET_BE_U_4(dp);
283 dp++;
284 if (sa3->sa_sizeset) {
285 sa3->sa_size = GET_BE_U_4(dp);
286 dp++;
287 }
288
289 sa3->sa_atimetype = GET_BE_U_4(dp);
290 dp++;
291 if (sa3->sa_atimetype == NFSV3SATTRTIME_TOCLIENT) {
292 sa3->sa_atime.nfsv3_sec = GET_BE_U_4(dp);
293 dp++;
294 sa3->sa_atime.nfsv3_nsec = GET_BE_U_4(dp);
295 dp++;
296 }
297
298 sa3->sa_mtimetype = GET_BE_U_4(dp);
299 dp++;
300 if (sa3->sa_mtimetype == NFSV3SATTRTIME_TOCLIENT) {
301 sa3->sa_mtime.nfsv3_sec = GET_BE_U_4(dp);
302 dp++;
303 sa3->sa_mtime.nfsv3_nsec = GET_BE_U_4(dp);
304 dp++;
305 }
306
307 return dp;
308 }
309
310 static void
311 print_sattr3(netdissect_options *ndo,
312 const struct nfsv3_sattr *sa3, int verbose)
313 {
314 if (sa3->sa_modeset)
315 ND_PRINT(" mode %o", sa3->sa_mode);
316 if (sa3->sa_uidset)
317 ND_PRINT(" uid %u", sa3->sa_uid);
318 if (sa3->sa_gidset)
319 ND_PRINT(" gid %u", sa3->sa_gid);
320 if (verbose > 1) {
321 if (sa3->sa_atimetype == NFSV3SATTRTIME_TOCLIENT)
322 ND_PRINT(" atime %u.%06u", sa3->sa_atime.nfsv3_sec,
323 sa3->sa_atime.nfsv3_nsec);
324 if (sa3->sa_mtimetype == NFSV3SATTRTIME_TOCLIENT)
325 ND_PRINT(" mtime %u.%06u", sa3->sa_mtime.nfsv3_sec,
326 sa3->sa_mtime.nfsv3_nsec);
327 }
328 }
329
330 void
331 nfsreply_print(netdissect_options *ndo,
332 const u_char *bp, u_int length,
333 const u_char *bp2)
334 {
335 const struct sunrpc_msg *rp;
336 char srcid[20], dstid[20]; /*fits 32bit*/
337
338 ndo->ndo_protocol = "nfs";
339 rp = (const struct sunrpc_msg *)bp;
340
341 if (!ndo->ndo_nflag) {
342 strlcpy(srcid, "nfs", sizeof(srcid));
343 snprintf(dstid, sizeof(dstid), "%u",
344 GET_BE_U_4(rp->rm_xid));
345 } else {
346 snprintf(srcid, sizeof(srcid), "%u", NFS_PORT);
347 snprintf(dstid, sizeof(dstid), "%u",
348 GET_BE_U_4(rp->rm_xid));
349 }
350 nfsaddr_print(ndo, bp2, srcid, dstid);
351
352 nfsreply_noaddr_print(ndo, bp, length, bp2);
353 }
354
355 void
356 nfsreply_noaddr_print(netdissect_options *ndo,
357 const u_char *bp, u_int length,
358 const u_char *bp2)
359 {
360 const struct sunrpc_msg *rp;
361 uint32_t proc, vers, reply_stat;
362 enum sunrpc_reject_stat rstat;
363 uint32_t rlow;
364 uint32_t rhigh;
365 enum sunrpc_auth_stat rwhy;
366
367 ndo->ndo_protocol = "nfs";
368 rp = (const struct sunrpc_msg *)bp;
369
370 ND_TCHECK_4(rp->rm_reply.rp_stat);
371 reply_stat = GET_BE_U_4(&rp->rm_reply.rp_stat);
372 switch (reply_stat) {
373
374 case SUNRPC_MSG_ACCEPTED:
375 ND_PRINT("reply ok %u", length);
376 if (xid_map_find(ndo, rp, bp2, &proc, &vers) >= 0)
377 interp_reply(ndo, rp, proc, vers, length);
378 break;
379
380 case SUNRPC_MSG_DENIED:
381 ND_PRINT("reply ERR %u: ", length);
382 ND_TCHECK_4(rp->rm_reply.rp_reject.rj_stat);
383 rstat = GET_BE_U_4(&rp->rm_reply.rp_reject.rj_stat);
384 switch (rstat) {
385
386 case SUNRPC_RPC_MISMATCH:
387 ND_TCHECK_4(rp->rm_reply.rp_reject.rj_vers.high);
388 rlow = GET_BE_U_4(&rp->rm_reply.rp_reject.rj_vers.low);
389 rhigh = GET_BE_U_4(&rp->rm_reply.rp_reject.rj_vers.high);
390 ND_PRINT("RPC Version mismatch (%u-%u)", rlow, rhigh);
391 break;
392
393 case SUNRPC_AUTH_ERROR:
394 ND_TCHECK_4(rp->rm_reply.rp_reject.rj_why);
395 rwhy = GET_BE_U_4(&rp->rm_reply.rp_reject.rj_why);
396 ND_PRINT("Auth %s", tok2str(sunrpc_auth_str, "Invalid failure code %u", rwhy));
397 break;
398
399 default:
400 ND_PRINT("Unknown reason for rejecting rpc message %u", (unsigned int)rstat);
401 break;
402 }
403 break;
404
405 default:
406 ND_PRINT("reply Unknown rpc response code=%u %u", reply_stat, length);
407 break;
408 }
409 return;
410
411 trunc:
412 nd_print_trunc(ndo);
413 }
414
415 /*
416 * Return a pointer to the first file handle in the packet.
417 * If the packet was truncated, return 0.
418 */
419 static const uint32_t *
420 parsereq(netdissect_options *ndo,
421 const struct sunrpc_msg *rp, u_int length)
422 {
423 const uint32_t *dp;
424 u_int len, rounded_len;
425
426 /*
427 * Find the start of the req data (if we captured it).
428 * First, get the length of the credentials, and make sure
429 * we have all of the opaque part of the credentials.
430 */
431 dp = (const uint32_t *)&rp->rm_call.cb_cred;
432 if (length < 2 * sizeof(*dp))
433 goto trunc;
434 len = GET_BE_U_4(dp + 1);
435 if (len > length) {
436 ND_PRINT(" [credentials length %u > %u]", len, length);
437 nd_print_invalid(ndo);
438 return NULL;
439 }
440 rounded_len = roundup2(len, 4);
441 ND_TCHECK_LEN(dp + 2, rounded_len);
442 if (2 * sizeof(*dp) + rounded_len <= length) {
443 /*
444 * We have all of the credentials. Skip past them; they
445 * consist of 4 bytes of flavor, 4 bytes of length,
446 * and len-rounded-up-to-a-multiple-of-4 bytes of
447 * data.
448 */
449 dp += (len + (2 * sizeof(*dp) + 3)) / sizeof(*dp);
450 length -= 2 * sizeof(*dp) + rounded_len;
451
452 /*
453 * Now get the length of the verifier, and make sure
454 * we have all of the opaque part of the verifier.
455 */
456 if (length < 2 * sizeof(*dp))
457 goto trunc;
458 len = GET_BE_U_4(dp + 1);
459 if (len > length) {
460 ND_PRINT(" [verifier length %u > %u]", len, length);
461 nd_print_invalid(ndo);
462 return NULL;
463 }
464 rounded_len = roundup2(len, 4);
465 ND_TCHECK_LEN(dp + 2, rounded_len);
466 if (2 * sizeof(*dp) + rounded_len < length) {
467 /*
468 * We have all of the verifier. Skip past it;
469 * it consists of 4 bytes of flavor, 4 bytes of
470 * length, and len-rounded-up-to-a-multiple-of-4
471 * bytes of data.
472 */
473 dp += (len + (2 * sizeof(*dp) + 3)) / sizeof(*dp);
474 return (dp);
475 }
476 }
477 trunc:
478 return (NULL);
479 }
480
481 /*
482 * Print out an NFS file handle and return a pointer to following word.
483 * If packet was truncated, return 0.
484 */
485 static const uint32_t *
486 parsefh(netdissect_options *ndo,
487 const uint32_t *dp, int v3)
488 {
489 u_int len;
490
491 if (v3) {
492 len = GET_BE_U_4(dp) / 4;
493 dp++;
494 } else
495 len = NFSX_V2FH / 4;
496
497 if (ND_TTEST_LEN(dp, len * sizeof(*dp))) {
498 nfs_printfh(ndo, dp, len);
499 return (dp + len);
500 } else
501 return NULL;
502 }
503
504 /*
505 * Print out a file name and return pointer to 32-bit word past it.
506 * If packet was truncated, return 0.
507 */
508 static const uint32_t *
509 parsefn(netdissect_options *ndo,
510 const uint32_t *dp)
511 {
512 uint32_t len, rounded_len;
513 const u_char *cp;
514
515 /* Fetch big-endian string length */
516 len = GET_BE_U_4(dp);
517 dp++;
518
519 if (UINT_MAX - len < 3) {
520 ND_PRINT("[cannot pad to 32-bit boundaries]");
521 nd_print_invalid(ndo);
522 return NULL;
523 }
524
525 rounded_len = roundup2(len, 4);
526 ND_TCHECK_LEN(dp, rounded_len);
527
528 cp = (const u_char *)dp;
529 /* Update 32-bit pointer (NFS filenames padded to 32-bit boundaries) */
530 dp += rounded_len / sizeof(*dp);
531 ND_PRINT("\"");
532 if (nd_printn(ndo, cp, len, ndo->ndo_snapend)) {
533 ND_PRINT("\"");
534 goto trunc;
535 }
536 ND_PRINT("\"");
537
538 return (dp);
539 trunc:
540 return NULL;
541 }
542
543 /*
544 * Print out file handle and file name.
545 * Return pointer to 32-bit word past file name.
546 * If packet was truncated (or there was some other error), return 0.
547 */
548 static const uint32_t *
549 parsefhn(netdissect_options *ndo,
550 const uint32_t *dp, int v3)
551 {
552 dp = parsefh(ndo, dp, v3);
553 if (dp == NULL)
554 return (NULL);
555 ND_PRINT(" ");
556 return (parsefn(ndo, dp));
557 }
558
559 void
560 nfsreq_noaddr_print(netdissect_options *ndo,
561 const u_char *bp, u_int length,
562 const u_char *bp2)
563 {
564 const struct sunrpc_msg *rp;
565 const uint32_t *dp;
566 nfs_type type;
567 int v3;
568 uint32_t proc;
569 uint32_t access_flags;
570 struct nfsv3_sattr sa3;
571
572 ndo->ndo_protocol = "nfs";
573 ND_PRINT("%u", length);
574 rp = (const struct sunrpc_msg *)bp;
575
576 if (!xid_map_enter(ndo, rp, bp2)) /* record proc number for later on */
577 goto trunc;
578
579 v3 = (GET_BE_U_4(&rp->rm_call.cb_vers) == NFS_VER3);
580 proc = GET_BE_U_4(&rp->rm_call.cb_proc);
581
582 if (!v3 && proc < NFS_NPROCS)
583 proc = nfsv3_procid[proc];
584
585 ND_PRINT(" %s", tok2str(nfsproc_str, "proc-%u", proc));
586 switch (proc) {
587
588 case NFSPROC_GETATTR:
589 case NFSPROC_SETATTR:
590 case NFSPROC_READLINK:
591 case NFSPROC_FSSTAT:
592 case NFSPROC_FSINFO:
593 case NFSPROC_PATHCONF:
594 dp = parsereq(ndo, rp, length);
595 if (dp == NULL)
596 goto trunc;
597 if (parsefh(ndo, dp, v3) == NULL)
598 goto trunc;
599 break;
600
601 case NFSPROC_LOOKUP:
602 case NFSPROC_CREATE:
603 case NFSPROC_MKDIR:
604 case NFSPROC_REMOVE:
605 case NFSPROC_RMDIR:
606 dp = parsereq(ndo, rp, length);
607 if (dp == NULL)
608 goto trunc;
609 if (parsefhn(ndo, dp, v3) == NULL)
610 goto trunc;
611 break;
612
613 case NFSPROC_ACCESS:
614 dp = parsereq(ndo, rp, length);
615 if (dp == NULL)
616 goto trunc;
617 dp = parsefh(ndo, dp, v3);
618 if (dp == NULL)
619 goto trunc;
620 access_flags = GET_BE_U_4(dp);
621 if (access_flags & ~NFSV3ACCESS_FULL) {
622 /* NFSV3ACCESS definitions aren't up to date */
623 ND_PRINT(" %04x", access_flags);
624 } else if ((access_flags & NFSV3ACCESS_FULL) == NFSV3ACCESS_FULL) {
625 ND_PRINT(" NFS_ACCESS_FULL");
626 } else {
627 char separator = ' ';
628 if (access_flags & NFSV3ACCESS_READ) {
629 ND_PRINT(" NFS_ACCESS_READ");
630 separator = '|';
631 }
632 if (access_flags & NFSV3ACCESS_LOOKUP) {
633 ND_PRINT("%cNFS_ACCESS_LOOKUP", separator);
634 separator = '|';
635 }
636 if (access_flags & NFSV3ACCESS_MODIFY) {
637 ND_PRINT("%cNFS_ACCESS_MODIFY", separator);
638 separator = '|';
639 }
640 if (access_flags & NFSV3ACCESS_EXTEND) {
641 ND_PRINT("%cNFS_ACCESS_EXTEND", separator);
642 separator = '|';
643 }
644 if (access_flags & NFSV3ACCESS_DELETE) {
645 ND_PRINT("%cNFS_ACCESS_DELETE", separator);
646 separator = '|';
647 }
648 if (access_flags & NFSV3ACCESS_EXECUTE)
649 ND_PRINT("%cNFS_ACCESS_EXECUTE", separator);
650 }
651 break;
652
653 case NFSPROC_READ:
654 dp = parsereq(ndo, rp, length);
655 if (dp == NULL)
656 goto trunc;
657 dp = parsefh(ndo, dp, v3);
658 if (dp == NULL)
659 goto trunc;
660 if (v3) {
661 ND_PRINT(" %u bytes @ %" PRIu64,
662 GET_BE_U_4(dp + 2),
663 GET_BE_U_8(dp));
664 } else {
665 ND_PRINT(" %u bytes @ %u",
666 GET_BE_U_4(dp + 1),
667 GET_BE_U_4(dp));
668 }
669 break;
670
671 case NFSPROC_WRITE:
672 dp = parsereq(ndo, rp, length);
673 if (dp == NULL)
674 goto trunc;
675 dp = parsefh(ndo, dp, v3);
676 if (dp == NULL)
677 goto trunc;
678 if (v3) {
679 ND_PRINT(" %u (%u) bytes @ %" PRIu64,
680 GET_BE_U_4(dp + 4),
681 GET_BE_U_4(dp + 2),
682 GET_BE_U_8(dp));
683 if (ndo->ndo_vflag) {
684 ND_PRINT(" <%s>",
685 tok2str(nfsv3_writemodes,
686 NULL, GET_BE_U_4(dp + 3)));
687 }
688 } else {
689 ND_PRINT(" %u (%u) bytes @ %u (%u)",
690 GET_BE_U_4(dp + 3),
691 GET_BE_U_4(dp + 2),
692 GET_BE_U_4(dp + 1),
693 GET_BE_U_4(dp));
694 }
695 break;
696
697 case NFSPROC_SYMLINK:
698 dp = parsereq(ndo, rp, length);
699 if (dp == NULL)
700 goto trunc;
701 dp = parsefhn(ndo, dp, v3);
702 if (dp == NULL)
703 goto trunc;
704 ND_PRINT(" ->");
705 if (v3 && (dp = parse_sattr3(ndo, dp, &sa3)) == NULL)
706 goto trunc;
707 if (parsefn(ndo, dp) == NULL)
708 goto trunc;
709 if (v3 && ndo->ndo_vflag)
710 print_sattr3(ndo, &sa3, ndo->ndo_vflag);
711 break;
712
713 case NFSPROC_MKNOD:
714 dp = parsereq(ndo, rp, length);
715 if (dp == NULL)
716 goto trunc;
717 dp = parsefhn(ndo, dp, v3);
718 if (dp == NULL)
719 goto trunc;
720 type = (nfs_type) GET_BE_U_4(dp);
721 dp++;
722 dp = parse_sattr3(ndo, dp, &sa3);
723 if (dp == NULL)
724 goto trunc;
725 ND_PRINT(" %s", tok2str(type2str, "unk-ft %u", type));
726 if (ndo->ndo_vflag && (type == NFCHR || type == NFBLK)) {
727 ND_PRINT(" %u/%u",
728 GET_BE_U_4(dp),
729 GET_BE_U_4(dp + 1));
730 dp += 2;
731 }
732 if (ndo->ndo_vflag)
733 print_sattr3(ndo, &sa3, ndo->ndo_vflag);
734 break;
735
736 case NFSPROC_RENAME:
737 dp = parsereq(ndo, rp, length);
738 if (dp == NULL)
739 goto trunc;
740 dp = parsefhn(ndo, dp, v3);
741 if (dp == NULL)
742 goto trunc;
743 ND_PRINT(" ->");
744 if (parsefhn(ndo, dp, v3) == NULL)
745 goto trunc;
746 break;
747
748 case NFSPROC_LINK:
749 dp = parsereq(ndo, rp, length);
750 if (dp == NULL)
751 goto trunc;
752 dp = parsefh(ndo, dp, v3);
753 if (dp == NULL)
754 goto trunc;
755 ND_PRINT(" ->");
756 if (parsefhn(ndo, dp, v3) == NULL)
757 goto trunc;
758 break;
759
760 case NFSPROC_READDIR:
761 dp = parsereq(ndo, rp, length);
762 if (dp == NULL)
763 goto trunc;
764 dp = parsefh(ndo, dp, v3);
765 if (dp == NULL)
766 goto trunc;
767 if (v3) {
768 /*
769 * We shouldn't really try to interpret the
770 * offset cookie here.
771 */
772 ND_PRINT(" %u bytes @ %" PRId64,
773 GET_BE_U_4(dp + 4),
774 GET_BE_U_8(dp));
775 if (ndo->ndo_vflag) {
776 /*
777 * This displays the 8 bytes
778 * of the verifier in order,
779 * from the low-order byte
780 * to the high-order byte.
781 */
782 ND_PRINT(" verf %08x%08x",
783 GET_BE_U_4(dp + 2),
784 GET_BE_U_4(dp + 3));
785 }
786 } else {
787 /*
788 * Print the offset as signed, since -1 is
789 * common, but offsets > 2^31 aren't.
790 */
791 ND_PRINT(" %u bytes @ %u",
792 GET_BE_U_4(dp + 1),
793 GET_BE_U_4(dp));
794 }
795 break;
796
797 case NFSPROC_READDIRPLUS:
798 dp = parsereq(ndo, rp, length);
799 if (dp == NULL)
800 goto trunc;
801 dp = parsefh(ndo, dp, v3);
802 if (dp == NULL)
803 goto trunc;
804 /*
805 * We don't try to interpret the offset
806 * cookie here.
807 */
808 ND_PRINT(" %u bytes @ %" PRId64,
809 GET_BE_U_4(dp + 4),
810 GET_BE_U_8(dp));
811 if (ndo->ndo_vflag) {
812 /*
813 * This displays the 8 bytes
814 * of the verifier in order,
815 * from the low-order byte
816 * to the high-order byte.
817 */
818 ND_PRINT(" max %u verf %08x%08x",
819 GET_BE_U_4(dp + 5),
820 GET_BE_U_4(dp + 2),
821 GET_BE_U_4(dp + 3));
822 }
823 break;
824
825 case NFSPROC_COMMIT:
826 dp = parsereq(ndo, rp, length);
827 if (dp == NULL)
828 goto trunc;
829 dp = parsefh(ndo, dp, v3);
830 if (dp == NULL)
831 goto trunc;
832 ND_PRINT(" %u bytes @ %" PRIu64,
833 GET_BE_U_4(dp + 2),
834 GET_BE_U_8(dp));
835 break;
836
837 default:
838 break;
839 }
840 return;
841
842 trunc:
843 nd_print_trunc(ndo);
844 }
845
846 /*
847 * Print out an NFS file handle.
848 * We assume packet was not truncated before the end of the
849 * file handle pointed to by dp.
850 *
851 * Note: new version (using portable file-handle parser) doesn't produce
852 * generation number. It probably could be made to do that, with some
853 * additional hacking on the parser code.
854 */
855 static void
856 nfs_printfh(netdissect_options *ndo,
857 const uint32_t *dp, const u_int len)
858 {
859 my_fsid fsid;
860 uint32_t ino;
861 const char *sfsname = NULL;
862 char *spacep;
863
864 if (ndo->ndo_uflag) {
865 u_int i;
866 char const *sep = "";
867
868 ND_PRINT(" fh[");
869 for (i=0; i<len; i++) {
870 /*
871 * This displays 4 bytes in big-endian byte
872 * order. That's as good a choice as little-
873 * endian, as there's no guarantee that the
874 * server is big-endian or little-endian or
875 * that the file handle contains 4-byte
876 * integral fields, and is better than "the
877 * byte order of the host running tcpdump", as
878 * the latter means that different hosts
879 * running tcpdump may show the same file
880 * handle in different ways.
881 */
882 ND_PRINT("%s%x", sep, GET_BE_U_4(dp + i));
883 sep = ":";
884 }
885 ND_PRINT("]");
886 return;
887 }
888
889 Parse_fh(ndo, (const u_char *)dp, len, &fsid, &ino, NULL, &sfsname, 0);
890
891 if (sfsname) {
892 /* file system ID is ASCII, not numeric, for this server OS */
893 char temp[NFSX_V3FHMAX+1];
894 u_int stringlen;
895
896 /* Make sure string is null-terminated */
897 stringlen = len;
898 if (stringlen > NFSX_V3FHMAX)
899 stringlen = NFSX_V3FHMAX;
900 strncpy(temp, sfsname, stringlen);
901 temp[stringlen] = '\0';
902 /* Remove trailing spaces */
903 spacep = strchr(temp, ' ');
904 if (spacep)
905 *spacep = '\0';
906
907 ND_PRINT(" fh ");
908 fn_print_str(ndo, (const u_char *)temp);
909 ND_PRINT("/");
910 } else {
911 ND_PRINT(" fh %u,%u/",
912 fsid.Fsid_dev.Major, fsid.Fsid_dev.Minor);
913 }
914
915 if(fsid.Fsid_dev.Minor == UINT_MAX && fsid.Fsid_dev.Major == UINT_MAX)
916 /* Print the undecoded handle */
917 fn_print_str(ndo, (const u_char *)fsid.Opaque_Handle);
918 else
919 ND_PRINT("%u", ino);
920 }
921
922 /*
923 * Maintain a small cache of recent client.XID.server/proc pairs, to allow
924 * us to match up replies with requests and thus to know how to parse
925 * the reply.
926 */
927
928 struct xid_map_entry {
929 uint32_t xid; /* transaction ID (net order) */
930 int ipver; /* IP version (4 or 6) */
931 nd_ipv6 client; /* client IP address (net order) */
932 nd_ipv6 server; /* server IP address (net order) */
933 uint32_t proc; /* call proc number (host order) */
934 uint32_t vers; /* program version (host order) */
935 };
936
937 /*
938 * Map entries are kept in an array that we manage as a ring;
939 * new entries are always added at the tail of the ring. Initially,
940 * all the entries are zero and hence don't match anything.
941 */
942
943 #define XIDMAPSIZE 64
944
945 static struct xid_map_entry xid_map[XIDMAPSIZE];
946
947 static int xid_map_next = 0;
948 static int xid_map_hint = 0;
949
950 static int
951 xid_map_enter(netdissect_options *ndo,
952 const struct sunrpc_msg *rp, const u_char *bp)
953 {
954 const struct ip *ip = NULL;
955 const struct ip6_hdr *ip6 = NULL;
956 struct xid_map_entry *xmep;
957
958 if (!ND_TTEST_4(rp->rm_call.cb_proc))
959 return (0);
960 switch (IP_V((const struct ip *)bp)) {
961 case 4:
962 ip = (const struct ip *)bp;
963 break;
964 case 6:
965 ip6 = (const struct ip6_hdr *)bp;
966 break;
967 default:
968 return (1);
969 }
970
971 xmep = &xid_map[xid_map_next];
972
973 if (++xid_map_next >= XIDMAPSIZE)
974 xid_map_next = 0;
975
976 UNALIGNED_MEMCPY(&xmep->xid, &rp->rm_xid, sizeof(xmep->xid));
977 if (ip) {
978 xmep->ipver = 4;
979 UNALIGNED_MEMCPY(&xmep->client, ip->ip_src,
980 sizeof(ip->ip_src));
981 UNALIGNED_MEMCPY(&xmep->server, ip->ip_dst,
982 sizeof(ip->ip_dst));
983 } else if (ip6) {
984 xmep->ipver = 6;
985 UNALIGNED_MEMCPY(&xmep->client, ip6->ip6_src,
986 sizeof(ip6->ip6_src));
987 UNALIGNED_MEMCPY(&xmep->server, ip6->ip6_dst,
988 sizeof(ip6->ip6_dst));
989 }
990 xmep->proc = GET_BE_U_4(&rp->rm_call.cb_proc);
991 xmep->vers = GET_BE_U_4(&rp->rm_call.cb_vers);
992 return (1);
993 }
994
995 /*
996 * Returns 0 and puts NFSPROC_xxx in proc return and
997 * version in vers return, or returns -1 on failure
998 */
999 static int
1000 xid_map_find(netdissect_options *ndo, const struct sunrpc_msg *rp,
1001 const u_char *bp, uint32_t *proc, uint32_t *vers)
1002 {
1003 int i;
1004 struct xid_map_entry *xmep;
1005 uint32_t xid;
1006 const struct ip *ip = (const struct ip *)bp;
1007 const struct ip6_hdr *ip6 = (const struct ip6_hdr *)bp;
1008 int cmp;
1009
1010 UNALIGNED_MEMCPY(&xid, &rp->rm_xid, sizeof(xmep->xid));
1011 /* Start searching from where we last left off */
1012 i = xid_map_hint;
1013 do {
1014 xmep = &xid_map[i];
1015 cmp = 1;
1016 if (xmep->ipver != IP_V(ip) || xmep->xid != xid)
1017 goto nextitem;
1018 switch (xmep->ipver) {
1019 case 4:
1020 if (UNALIGNED_MEMCMP(ip->ip_src, &xmep->server,
1021 sizeof(ip->ip_src)) != 0 ||
1022 UNALIGNED_MEMCMP(ip->ip_dst, &xmep->client,
1023 sizeof(ip->ip_dst)) != 0) {
1024 cmp = 0;
1025 }
1026 break;
1027 case 6:
1028 if (UNALIGNED_MEMCMP(ip6->ip6_src, &xmep->server,
1029 sizeof(ip6->ip6_src)) != 0 ||
1030 UNALIGNED_MEMCMP(ip6->ip6_dst, &xmep->client,
1031 sizeof(ip6->ip6_dst)) != 0) {
1032 cmp = 0;
1033 }
1034 break;
1035 default:
1036 cmp = 0;
1037 break;
1038 }
1039 if (cmp) {
1040 /* match */
1041 xid_map_hint = i;
1042 *proc = xmep->proc;
1043 *vers = xmep->vers;
1044 return 0;
1045 }
1046 nextitem:
1047 if (++i >= XIDMAPSIZE)
1048 i = 0;
1049 } while (i != xid_map_hint);
1050
1051 /* search failed */
1052 return (-1);
1053 }
1054
1055 /*
1056 * Routines for parsing reply packets
1057 */
1058
1059 /*
1060 * Return a pointer to the beginning of the actual results.
1061 * If the packet was truncated, return 0.
1062 */
1063 static const uint32_t *
1064 parserep(netdissect_options *ndo,
1065 const struct sunrpc_msg *rp, u_int length, int *nfserrp)
1066 {
1067 const uint32_t *dp;
1068 u_int len;
1069 enum sunrpc_accept_stat astat;
1070
1071 /*
1072 * Portability note:
1073 * Here we find the address of the ar_verf credentials.
1074 * Originally, this calculation was
1075 * dp = (uint32_t *)&rp->rm_reply.rp_acpt.ar_verf
1076 * On the wire, the rp_acpt field starts immediately after
1077 * the (32 bit) rp_stat field. However, rp_acpt (which is a
1078 * "struct accepted_reply") contains a "struct opaque_auth",
1079 * whose internal representation contains a pointer, so on a
1080 * 64-bit machine the compiler inserts 32 bits of padding
1081 * before rp->rm_reply.rp_acpt.ar_verf. So, we cannot use
1082 * the internal representation to parse the on-the-wire
1083 * representation. Instead, we skip past the rp_stat field,
1084 * which is an "enum" and so occupies one 32-bit word.
1085 */
1086 dp = ((const uint32_t *)&rp->rm_reply) + 1;
1087 len = GET_BE_U_4(dp + 1);
1088 if (len >= length)
1089 return (NULL);
1090 /*
1091 * skip past the ar_verf credentials.
1092 */
1093 dp += (len + (2*sizeof(uint32_t) + 3)) / sizeof(uint32_t);
1094
1095 /*
1096 * now we can check the ar_stat field
1097 */
1098 astat = (enum sunrpc_accept_stat) GET_BE_U_4(dp);
1099 if (astat != SUNRPC_SUCCESS) {
1100 ND_PRINT(" %s", tok2str(sunrpc_str, "ar_stat %u", astat));
1101 *nfserrp = 1; /* suppress trunc string */
1102 return (NULL);
1103 }
1104 /* successful return */
1105 ND_TCHECK_LEN(dp, sizeof(astat));
1106 return ((const uint32_t *) (sizeof(astat) + ((const char *)dp)));
1107 trunc:
1108 return (0);
1109 }
1110
1111 static const uint32_t *
1112 parsestatus(netdissect_options *ndo,
1113 const uint32_t *dp, u_int *er, int *nfserrp)
1114 {
1115 u_int errnum;
1116
1117 errnum = GET_BE_U_4(dp);
1118 if (er)
1119 *er = errnum;
1120 if (errnum != 0) {
1121 if (!ndo->ndo_qflag)
1122 ND_PRINT(" ERROR: %s",
1123 tok2str(status2str, "unk %u", errnum));
1124 *nfserrp = 1;
1125 }
1126 return (dp + 1);
1127 }
1128
1129 static const uint32_t *
1130 parsefattr(netdissect_options *ndo,
1131 const uint32_t *dp, int verbose, int v3)
1132 {
1133 const struct nfs_fattr *fap;
1134
1135 fap = (const struct nfs_fattr *)dp;
1136 ND_TCHECK_4(fap->fa_gid);
1137 if (verbose) {
1138 /*
1139 * XXX - UIDs and GIDs are unsigned in NFS and in
1140 * at least some UN*Xes, but we'll show them as
1141 * signed because -2 has traditionally been the
1142 * UID for "nobody", rather than 4294967294.
1143 */
1144 ND_PRINT(" %s %o ids %d/%d",
1145 tok2str(type2str, "unk-ft %u ",
1146 GET_BE_U_4(fap->fa_type)),
1147 GET_BE_U_4(fap->fa_mode),
1148 GET_BE_S_4(fap->fa_uid),
1149 GET_BE_S_4(fap->fa_gid));
1150 if (v3) {
1151 ND_PRINT(" sz %" PRIu64,
1152 GET_BE_U_8(fap->fa3_size));
1153 } else {
1154 ND_PRINT(" sz %u", GET_BE_U_4(fap->fa2_size));
1155 }
1156 }
1157 /* print lots more stuff */
1158 if (verbose > 1) {
1159 if (v3) {
1160 ND_TCHECK_8(&fap->fa3_ctime);
1161 ND_PRINT(" nlink %u rdev %u/%u",
1162 GET_BE_U_4(fap->fa_nlink),
1163 GET_BE_U_4(fap->fa3_rdev.specdata1),
1164 GET_BE_U_4(fap->fa3_rdev.specdata2));
1165 ND_PRINT(" fsid %" PRIx64,
1166 GET_BE_U_8(fap->fa3_fsid));
1167 ND_PRINT(" fileid %" PRIx64,
1168 GET_BE_U_8(fap->fa3_fileid));
1169 ND_PRINT(" a/m/ctime %u.%06u",
1170 GET_BE_U_4(fap->fa3_atime.nfsv3_sec),
1171 GET_BE_U_4(fap->fa3_atime.nfsv3_nsec));
1172 ND_PRINT(" %u.%06u",
1173 GET_BE_U_4(fap->fa3_mtime.nfsv3_sec),
1174 GET_BE_U_4(fap->fa3_mtime.nfsv3_nsec));
1175 ND_PRINT(" %u.%06u",
1176 GET_BE_U_4(fap->fa3_ctime.nfsv3_sec),
1177 GET_BE_U_4(fap->fa3_ctime.nfsv3_nsec));
1178 } else {
1179 ND_TCHECK_8(&fap->fa2_ctime);
1180 ND_PRINT(" nlink %u rdev 0x%x fsid 0x%x nodeid 0x%x a/m/ctime",
1181 GET_BE_U_4(fap->fa_nlink),
1182 GET_BE_U_4(fap->fa2_rdev),
1183 GET_BE_U_4(fap->fa2_fsid),
1184 GET_BE_U_4(fap->fa2_fileid));
1185 ND_PRINT(" %u.%06u",
1186 GET_BE_U_4(fap->fa2_atime.nfsv2_sec),
1187 GET_BE_U_4(fap->fa2_atime.nfsv2_usec));
1188 ND_PRINT(" %u.%06u",
1189 GET_BE_U_4(fap->fa2_mtime.nfsv2_sec),
1190 GET_BE_U_4(fap->fa2_mtime.nfsv2_usec));
1191 ND_PRINT(" %u.%06u",
1192 GET_BE_U_4(fap->fa2_ctime.nfsv2_sec),
1193 GET_BE_U_4(fap->fa2_ctime.nfsv2_usec));
1194 }
1195 }
1196 return ((const uint32_t *)((const unsigned char *)dp +
1197 (v3 ? NFSX_V3FATTR : NFSX_V2FATTR)));
1198 trunc:
1199 return (NULL);
1200 }
1201
1202 static int
1203 parseattrstat(netdissect_options *ndo,
1204 const uint32_t *dp, int verbose, int v3, int *nfserrp)
1205 {
1206 u_int er;
1207
1208 dp = parsestatus(ndo, dp, &er, nfserrp);
1209 if (dp == NULL)
1210 return (0);
1211 if (er)
1212 return (1);
1213
1214 return (parsefattr(ndo, dp, verbose, v3) != NULL);
1215 }
1216
1217 static int
1218 parsediropres(netdissect_options *ndo,
1219 const uint32_t *dp, int *nfserrp)
1220 {
1221 u_int er;
1222
1223 dp = parsestatus(ndo, dp, &er, nfserrp);
1224 if (dp == NULL)
1225 return (0);
1226 if (er)
1227 return (1);
1228
1229 dp = parsefh(ndo, dp, 0);
1230 if (dp == NULL)
1231 return (0);
1232
1233 return (parsefattr(ndo, dp, ndo->ndo_vflag, 0) != NULL);
1234 }
1235
1236 static int
1237 parselinkres(netdissect_options *ndo,
1238 const uint32_t *dp, int v3, int *nfserrp)
1239 {
1240 u_int er;
1241
1242 dp = parsestatus(ndo, dp, &er, nfserrp);
1243 if (dp == NULL)
1244 return(0);
1245 if (er)
1246 return(1);
1247 if (v3) {
1248 dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
1249 if (dp == NULL)
1250 return (0);
1251 }
1252 ND_PRINT(" ");
1253 return (parsefn(ndo, dp) != NULL);
1254 }
1255
1256 static int
1257 parsestatfs(netdissect_options *ndo,
1258 const uint32_t *dp, int v3, int *nfserrp)
1259 {
1260 const struct nfs_statfs *sfsp;
1261 u_int er;
1262
1263 dp = parsestatus(ndo, dp, &er, nfserrp);
1264 if (dp == NULL)
1265 return (0);
1266 if (!v3 && er)
1267 return (1);
1268
1269 if (ndo->ndo_qflag)
1270 return(1);
1271
1272 if (v3) {
1273 if (ndo->ndo_vflag)
1274 ND_PRINT(" POST:");
1275 dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
1276 if (dp == NULL)
1277 return (0);
1278 }
1279
1280 ND_TCHECK_LEN(dp, (v3 ? NFSX_V3STATFS : NFSX_V2STATFS));
1281
1282 sfsp = (const struct nfs_statfs *)dp;
1283
1284 if (v3) {
1285 ND_PRINT(" tbytes %" PRIu64 " fbytes %" PRIu64 " abytes %" PRIu64,
1286 GET_BE_U_8(sfsp->sf_tbytes),
1287 GET_BE_U_8(sfsp->sf_fbytes),
1288 GET_BE_U_8(sfsp->sf_abytes));
1289 if (ndo->ndo_vflag) {
1290 ND_PRINT(" tfiles %" PRIu64 " ffiles %" PRIu64 " afiles %" PRIu64 " invar %u",
1291 GET_BE_U_8(sfsp->sf_tfiles),
1292 GET_BE_U_8(sfsp->sf_ffiles),
1293 GET_BE_U_8(sfsp->sf_afiles),
1294 GET_BE_U_4(sfsp->sf_invarsec));
1295 }
1296 } else {
1297 ND_PRINT(" tsize %u bsize %u blocks %u bfree %u bavail %u",
1298 GET_BE_U_4(sfsp->sf_tsize),
1299 GET_BE_U_4(sfsp->sf_bsize),
1300 GET_BE_U_4(sfsp->sf_blocks),
1301 GET_BE_U_4(sfsp->sf_bfree),
1302 GET_BE_U_4(sfsp->sf_bavail));
1303 }
1304
1305 return (1);
1306 trunc:
1307 return (0);
1308 }
1309
1310 static int
1311 parserddires(netdissect_options *ndo,
1312 const uint32_t *dp, int *nfserrp)
1313 {
1314 u_int er;
1315
1316 dp = parsestatus(ndo, dp, &er, nfserrp);
1317 if (dp == NULL)
1318 return (0);
1319 if (er)
1320 return (1);
1321 if (ndo->ndo_qflag)
1322 return (1);
1323
1324 ND_PRINT(" offset 0x%x size %u ",
1325 GET_BE_U_4(dp), GET_BE_U_4(dp + 1));
1326 if (GET_BE_U_4(dp + 2) != 0)
1327 ND_PRINT(" eof");
1328
1329 return (1);
1330 }
1331
1332 static const uint32_t *
1333 parse_wcc_attr(netdissect_options *ndo,
1334 const uint32_t *dp)
1335 {
1336 /* Our caller has already checked this */
1337 ND_PRINT(" sz %" PRIu64, GET_BE_U_8(dp));
1338 ND_PRINT(" mtime %u.%06u ctime %u.%06u",
1339 GET_BE_U_4(dp + 2), GET_BE_U_4(dp + 3),
1340 GET_BE_U_4(dp + 4), GET_BE_U_4(dp + 5));
1341 return (dp + 6);
1342 }
1343
1344 /*
1345 * Pre operation attributes. Print only if vflag > 1.
1346 */
1347 static const uint32_t *
1348 parse_pre_op_attr(netdissect_options *ndo,
1349 const uint32_t *dp, int verbose)
1350 {
1351 if (!GET_BE_U_4(dp))
1352 return (dp + 1);
1353 dp++;
1354 ND_TCHECK_LEN(dp, 24);
1355 if (verbose > 1) {
1356 return parse_wcc_attr(ndo, dp);
1357 } else {
1358 /* If not verbose enough, just skip over wcc_attr */
1359 return (dp + 6);
1360 }
1361 trunc:
1362 return (NULL);
1363 }
1364
1365 /*
1366 * Post operation attributes are printed if vflag >= 1
1367 */
1368 static const uint32_t *
1369 parse_post_op_attr(netdissect_options *ndo,
1370 const uint32_t *dp, int verbose)
1371 {
1372 if (!GET_BE_U_4(dp))
1373 return (dp + 1);
1374 dp++;
1375 if (verbose) {
1376 return parsefattr(ndo, dp, verbose, 1);
1377 } else
1378 return (dp + (NFSX_V3FATTR / sizeof (uint32_t)));
1379 }
1380
1381 static const uint32_t *
1382 parse_wcc_data(netdissect_options *ndo,
1383 const uint32_t *dp, int verbose)
1384 {
1385 if (verbose > 1)
1386 ND_PRINT(" PRE:");
1387 dp = parse_pre_op_attr(ndo, dp, verbose);
1388 if (dp == NULL)
1389 return (0);
1390
1391 if (verbose)
1392 ND_PRINT(" POST:");
1393 return parse_post_op_attr(ndo, dp, verbose);
1394 }
1395
1396 static const uint32_t *
1397 parsecreateopres(netdissect_options *ndo,
1398 const uint32_t *dp, int verbose, int *nfserrp)
1399 {
1400 u_int er;
1401
1402 dp = parsestatus(ndo, dp, &er, nfserrp);
1403 if (dp == NULL)
1404 return (0);
1405 if (er)
1406 dp = parse_wcc_data(ndo, dp, verbose);
1407 else {
1408 if (!GET_BE_U_4(dp))
1409 return (dp + 1);
1410 dp++;
1411 dp = parsefh(ndo, dp, 1);
1412 if (dp == NULL)
1413 return (0);
1414 if (verbose) {
1415 dp = parse_post_op_attr(ndo, dp, verbose);
1416 if (dp == NULL)
1417 return (0);
1418 if (ndo->ndo_vflag > 1) {
1419 ND_PRINT(" dir attr:");
1420 dp = parse_wcc_data(ndo, dp, verbose);
1421 }
1422 }
1423 }
1424 return (dp);
1425 }
1426
1427 static const uint32_t *
1428 parsewccres(netdissect_options *ndo,
1429 const uint32_t *dp, int verbose, int *nfserrp)
1430 {
1431 u_int er;
1432
1433 dp = parsestatus(ndo, dp, &er, nfserrp);
1434 if (dp == NULL)
1435 return (0);
1436 return parse_wcc_data(ndo, dp, verbose);
1437 }
1438
1439 static const uint32_t *
1440 parsev3rddirres(netdissect_options *ndo,
1441 const uint32_t *dp, int verbose, int *nfserrp)
1442 {
1443 u_int er;
1444
1445 dp = parsestatus(ndo, dp, &er, nfserrp);
1446 if (dp == NULL)
1447 return (0);
1448 if (ndo->ndo_vflag)
1449 ND_PRINT(" POST:");
1450 dp = parse_post_op_attr(ndo, dp, verbose);
1451 if (dp == NULL)
1452 return (0);
1453 if (er)
1454 return dp;
1455 if (ndo->ndo_vflag) {
1456 /*
1457 * This displays the 8 bytes of the verifier in order,
1458 * from the low-order byte to the high-order byte.
1459 */
1460 ND_PRINT(" verf %08x%08x",
1461 GET_BE_U_4(dp), GET_BE_U_4(dp + 1));
1462 dp += 2;
1463 }
1464 return dp;
1465 }
1466
1467 static int
1468 parsefsinfo(netdissect_options *ndo,
1469 const uint32_t *dp, int *nfserrp)
1470 {
1471 const struct nfsv3_fsinfo *sfp;
1472 u_int er;
1473
1474 dp = parsestatus(ndo, dp, &er, nfserrp);
1475 if (dp == NULL)
1476 return (0);
1477 if (ndo->ndo_vflag)
1478 ND_PRINT(" POST:");
1479 dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
1480 if (dp == NULL)
1481 return (0);
1482 if (er)
1483 return (1);
1484
1485 sfp = (const struct nfsv3_fsinfo *)dp;
1486 ND_TCHECK_SIZE(sfp);
1487 ND_PRINT(" rtmax %u rtpref %u wtmax %u wtpref %u dtpref %u",
1488 GET_BE_U_4(sfp->fs_rtmax),
1489 GET_BE_U_4(sfp->fs_rtpref),
1490 GET_BE_U_4(sfp->fs_wtmax),
1491 GET_BE_U_4(sfp->fs_wtpref),
1492 GET_BE_U_4(sfp->fs_dtpref));
1493 if (ndo->ndo_vflag) {
1494 ND_PRINT(" rtmult %u wtmult %u maxfsz %" PRIu64,
1495 GET_BE_U_4(sfp->fs_rtmult),
1496 GET_BE_U_4(sfp->fs_wtmult),
1497 GET_BE_U_8(sfp->fs_maxfilesize));
1498 ND_PRINT(" delta %u.%06u ",
1499 GET_BE_U_4(sfp->fs_timedelta.nfsv3_sec),
1500 GET_BE_U_4(sfp->fs_timedelta.nfsv3_nsec));
1501 }
1502 return (1);
1503 trunc:
1504 return (0);
1505 }
1506
1507 static int
1508 parsepathconf(netdissect_options *ndo,
1509 const uint32_t *dp, int *nfserrp)
1510 {
1511 u_int er;
1512 const struct nfsv3_pathconf *spp;
1513
1514 dp = parsestatus(ndo, dp, &er, nfserrp);
1515 if (dp == NULL)
1516 return (0);
1517 if (ndo->ndo_vflag)
1518 ND_PRINT(" POST:");
1519 dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
1520 if (dp == NULL)
1521 return (0);
1522 if (er)
1523 return (1);
1524
1525 spp = (const struct nfsv3_pathconf *)dp;
1526 ND_TCHECK_SIZE(spp);
1527
1528 ND_PRINT(" linkmax %u namemax %u %s %s %s %s",
1529 GET_BE_U_4(spp->pc_linkmax),
1530 GET_BE_U_4(spp->pc_namemax),
1531 GET_BE_U_4(spp->pc_notrunc) ? "notrunc" : "",
1532 GET_BE_U_4(spp->pc_chownrestricted) ? "chownres" : "",
1533 GET_BE_U_4(spp->pc_caseinsensitive) ? "igncase" : "",
1534 GET_BE_U_4(spp->pc_casepreserving) ? "keepcase" : "");
1535 return (1);
1536 trunc:
1537 return (0);
1538 }
1539
1540 static void
1541 interp_reply(netdissect_options *ndo,
1542 const struct sunrpc_msg *rp, uint32_t proc, uint32_t vers,
1543 int length)
1544 {
1545 const uint32_t *dp;
1546 int v3;
1547 u_int er;
1548 int nfserr = 0;
1549
1550 v3 = (vers == NFS_VER3);
1551
1552 if (!v3 && proc < NFS_NPROCS)
1553 proc = nfsv3_procid[proc];
1554
1555 ND_PRINT(" %s", tok2str(nfsproc_str, "proc-%u", proc));
1556 switch (proc) {
1557
1558 case NFSPROC_GETATTR:
1559 dp = parserep(ndo, rp, length, &nfserr);
1560 if (dp == NULL)
1561 goto trunc;
1562 if (parseattrstat(ndo, dp, !ndo->ndo_qflag, v3, &nfserr) == 0)
1563 goto trunc;
1564 break;
1565
1566 case NFSPROC_SETATTR:
1567 dp = parserep(ndo, rp, length, &nfserr);
1568 if (dp == NULL)
1569 goto trunc;
1570 if (v3) {
1571 if (parsewccres(ndo, dp, ndo->ndo_vflag, &nfserr) == NULL)
1572 goto trunc;
1573 } else {
1574 if (parseattrstat(ndo, dp, !ndo->ndo_qflag, 0, &nfserr) == 0)
1575 goto trunc;
1576 }
1577 break;
1578
1579 case NFSPROC_LOOKUP:
1580 dp = parserep(ndo, rp, length, &nfserr);
1581 if (dp == NULL)
1582 goto trunc;
1583 if (v3) {
1584 dp = parsestatus(ndo, dp, &er, &nfserr);
1585 if (dp == NULL)
1586 goto trunc;
1587 if (er) {
1588 if (ndo->ndo_vflag > 1) {
1589 ND_PRINT(" post dattr:");
1590 dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
1591 if (dp == NULL)
1592 goto trunc;
1593 }
1594 } else {
1595 dp = parsefh(ndo, dp, v3);
1596 if (dp == NULL)
1597 goto trunc;
1598 dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
1599 if (dp == NULL)
1600 goto trunc;
1601 if (ndo->ndo_vflag > 1) {
1602 ND_PRINT(" post dattr:");
1603 dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
1604 if (dp == NULL)
1605 goto trunc;
1606 }
1607 }
1608 } else {
1609 if (parsediropres(ndo, dp, &nfserr) == 0)
1610 goto trunc;
1611 }
1612 break;
1613
1614 case NFSPROC_ACCESS:
1615 dp = parserep(ndo, rp, length, &nfserr);
1616 if (dp == NULL)
1617 goto trunc;
1618 dp = parsestatus(ndo, dp, &er, &nfserr);
1619 if (dp == NULL)
1620 goto trunc;
1621 if (ndo->ndo_vflag)
1622 ND_PRINT(" attr:");
1623 dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
1624 if (dp == NULL)
1625 goto trunc;
1626 if (!er) {
1627 ND_PRINT(" c %04x", GET_BE_U_4(dp));
1628 }
1629 break;
1630
1631 case NFSPROC_READLINK:
1632 dp = parserep(ndo, rp, length, &nfserr);
1633 if (dp == NULL)
1634 goto trunc;
1635 if (parselinkres(ndo, dp, v3, &nfserr) == 0)
1636 goto trunc;
1637 break;
1638
1639 case NFSPROC_READ:
1640 dp = parserep(ndo, rp, length, &nfserr);
1641 if (dp == NULL)
1642 goto trunc;
1643 if (v3) {
1644 dp = parsestatus(ndo, dp, &er, &nfserr);
1645 if (dp == NULL)
1646 goto trunc;
1647 dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
1648 if (dp == NULL)
1649 goto trunc;
1650 if (!er) {
1651 if (ndo->ndo_vflag) {
1652 ND_PRINT(" %u bytes", GET_BE_U_4(dp));
1653 if (GET_BE_U_4(dp + 1))
1654 ND_PRINT(" EOF");
1655 }
1656 }
1657 } else {
1658 if (parseattrstat(ndo, dp, ndo->ndo_vflag, 0, &nfserr) == 0)
1659 goto trunc;
1660 }
1661 break;
1662
1663 case NFSPROC_WRITE:
1664 dp = parserep(ndo, rp, length, &nfserr);
1665 if (dp == NULL)
1666 goto trunc;
1667 if (v3) {
1668 dp = parsestatus(ndo, dp, &er, &nfserr);
1669 if (dp == NULL)
1670 goto trunc;
1671 dp = parse_wcc_data(ndo, dp, ndo->ndo_vflag);
1672 if (dp == NULL)
1673 goto trunc;
1674 if (!er) {
1675 if (ndo->ndo_vflag) {
1676 ND_PRINT(" %u bytes", GET_BE_U_4(dp));
1677 if (ndo->ndo_vflag > 1) {
1678 ND_PRINT(" <%s>",
1679 tok2str(nfsv3_writemodes,
1680 NULL, GET_BE_U_4(dp + 1)));
1681
1682 /* write-verf-cookie */
1683 ND_PRINT(" verf %" PRIx64,
1684 GET_BE_U_8(dp + 2));
1685 }
1686 }
1687 }
1688 return;
1689 } else {
1690 if (parseattrstat(ndo, dp, ndo->ndo_vflag, v3, &nfserr) == 0)
1691 goto trunc;
1692 }
1693 break;
1694
1695 case NFSPROC_CREATE:
1696 case NFSPROC_MKDIR:
1697 dp = parserep(ndo, rp, length, &nfserr);
1698 if (dp == NULL)
1699 goto trunc;
1700 if (v3) {
1701 if (parsecreateopres(ndo, dp, ndo->ndo_vflag, &nfserr) == NULL)
1702 goto trunc;
1703 } else {
1704 if (parsediropres(ndo, dp, &nfserr) == 0)
1705 goto trunc;
1706 }
1707 break;
1708
1709 case NFSPROC_SYMLINK:
1710 dp = parserep(ndo, rp, length, &nfserr);
1711 if (dp == NULL)
1712 goto trunc;
1713 if (v3) {
1714 if (parsecreateopres(ndo, dp, ndo->ndo_vflag, &nfserr) == NULL)
1715 goto trunc;
1716 } else {
1717 if (parsestatus(ndo, dp, &er, &nfserr) == NULL)
1718 goto trunc;
1719 }
1720 break;
1721
1722 case NFSPROC_MKNOD:
1723 dp = parserep(ndo, rp, length, &nfserr);
1724 if (dp == NULL)
1725 goto trunc;
1726 if (parsecreateopres(ndo, dp, ndo->ndo_vflag, &nfserr) == NULL)
1727 goto trunc;
1728 break;
1729
1730 case NFSPROC_REMOVE:
1731 case NFSPROC_RMDIR:
1732 dp = parserep(ndo, rp, length, &nfserr);
1733 if (dp == NULL)
1734 goto trunc;
1735 if (v3) {
1736 if (parsewccres(ndo, dp, ndo->ndo_vflag, &nfserr) == NULL)
1737 goto trunc;
1738 } else {
1739 if (parsestatus(ndo, dp, &er, &nfserr) == NULL)
1740 goto trunc;
1741 }
1742 break;
1743
1744 case NFSPROC_RENAME:
1745 dp = parserep(ndo, rp, length, &nfserr);
1746 if (dp == NULL)
1747 goto trunc;
1748 if (v3) {
1749 dp = parsestatus(ndo, dp, &er, &nfserr);
1750 if (dp == NULL)
1751 goto trunc;
1752 if (ndo->ndo_vflag) {
1753 ND_PRINT(" from:");
1754 dp = parse_wcc_data(ndo, dp, ndo->ndo_vflag);
1755 if (dp == NULL)
1756 goto trunc;
1757 ND_PRINT(" to:");
1758 dp = parse_wcc_data(ndo, dp, ndo->ndo_vflag);
1759 if (dp == NULL)
1760 goto trunc;
1761 }
1762 } else {
1763 if (parsestatus(ndo, dp, &er, &nfserr) == NULL)
1764 goto trunc;
1765 }
1766 break;
1767
1768 case NFSPROC_LINK:
1769 dp = parserep(ndo, rp, length, &nfserr);
1770 if (dp == NULL)
1771 goto trunc;
1772 if (v3) {
1773 dp = parsestatus(ndo, dp, &er, &nfserr);
1774 if (dp == NULL)
1775 goto trunc;
1776 if (ndo->ndo_vflag) {
1777 ND_PRINT(" file POST:");
1778 dp = parse_post_op_attr(ndo, dp, ndo->ndo_vflag);
1779 if (dp == NULL)
1780 goto trunc;
1781 ND_PRINT(" dir:");
1782 dp = parse_wcc_data(ndo, dp, ndo->ndo_vflag);
1783 if (dp == NULL)
1784 goto trunc;
1785 }
1786 return;
1787 } else {
1788 if (parsestatus(ndo, dp, &er, &nfserr) == NULL)
1789 goto trunc;
1790 }
1791 break;
1792
1793 case NFSPROC_READDIR:
1794 dp = parserep(ndo, rp, length, &nfserr);
1795 if (dp == NULL)
1796 goto trunc;
1797 if (v3) {
1798 if (parsev3rddirres(ndo, dp, ndo->ndo_vflag, &nfserr) == NULL)
1799 goto trunc;
1800 } else {
1801 if (parserddires(ndo, dp, &nfserr) == 0)
1802 goto trunc;
1803 }
1804 break;
1805
1806 case NFSPROC_READDIRPLUS:
1807 dp = parserep(ndo, rp, length, &nfserr);
1808 if (dp == NULL)
1809 goto trunc;
1810 if (parsev3rddirres(ndo, dp, ndo->ndo_vflag, &nfserr) == NULL)
1811 goto trunc;
1812 break;
1813
1814 case NFSPROC_FSSTAT:
1815 dp = parserep(ndo, rp, length, &nfserr);
1816 if (dp == NULL)
1817 goto trunc;
1818 if (parsestatfs(ndo, dp, v3, &nfserr) == 0)
1819 goto trunc;
1820 break;
1821
1822 case NFSPROC_FSINFO:
1823 dp = parserep(ndo, rp, length, &nfserr);
1824 if (dp == NULL)
1825 goto trunc;
1826 if (parsefsinfo(ndo, dp, &nfserr) == 0)
1827 goto trunc;
1828 break;
1829
1830 case NFSPROC_PATHCONF:
1831 dp = parserep(ndo, rp, length, &nfserr);
1832 if (dp == NULL)
1833 goto trunc;
1834 if (parsepathconf(ndo, dp, &nfserr) == 0)
1835 goto trunc;
1836 break;
1837
1838 case NFSPROC_COMMIT:
1839 dp = parserep(ndo, rp, length, &nfserr);
1840 if (dp == NULL)
1841 goto trunc;
1842 dp = parsewccres(ndo, dp, ndo->ndo_vflag, &nfserr);
1843 if (dp == NULL)
1844 goto trunc;
1845 if (ndo->ndo_vflag > 1) {
1846 /* write-verf-cookie */
1847 ND_PRINT(" verf %" PRIx64, GET_BE_U_8(dp));
1848 }
1849 break;
1850
1851 default:
1852 break;
1853 }
1854 return;
1855
1856 trunc:
1857 if (!nfserr)
1858 nd_print_trunc(ndo);
1859 }
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