1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 *
21 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
22 * Use is subject to license terms.
23 */
24
25 /*
26 * IPMP query interfaces (see PSARC/2002/615 and PSARC/2007/272).
27 */
28
29 #include <assert.h>
30 #include <errno.h>
31 #include <libinetutil.h>
32 #include <string.h>
33 #include <stdlib.h>
34 #include <unistd.h>
35 #include <sys/types.h>
36
37 #include "ipmp_impl.h"
38 #include "ipmp_mpathd.h"
39 #include "ipmp_query_impl.h"
40
41 static ipmp_ifinfo_t *ipmp_ifinfo_clone(ipmp_ifinfo_t *);
42 static ipmp_addrinfo_t *ipmp_addrinfo_clone(ipmp_addrinfo_t *);
43 static ipmp_addrlist_t *ipmp_addrlist_clone(ipmp_addrlist_t *);
44 static ipmp_grouplist_t *ipmp_grouplist_clone(ipmp_grouplist_t *);
45 static ipmp_groupinfo_t *ipmp_groupinfo_clone(ipmp_groupinfo_t *);
46 static ipmp_iflist_t *ipmp_iflist_create(uint_t, char (*)[LIFNAMSIZ]);
47 static void ipmp_freeiflist(ipmp_iflist_t *);
48 static ipmp_addrlist_t *ipmp_addrlist_create(uint_t, struct sockaddr_storage *);
49 static void ipmp_freeaddrlist(ipmp_addrlist_t *);
50 static ipmp_groupinfo_t *ipmp_snap_getgroupinfo(ipmp_snap_t *, const char *);
51 static ipmp_ifinfo_t *ipmp_snap_getifinfo(ipmp_snap_t *, const char *);
52 static ipmp_addrinfo_t *ipmp_snap_getaddrinfo(ipmp_snap_t *, const char *,
53 struct sockaddr_storage *);
54 static int ipmp_snap_take(ipmp_state_t *, ipmp_snap_t **);
55 static boolean_t ipmp_checktlv(ipmp_infotype_t, size_t, void *);
56 static int ipmp_querydone(ipmp_state_t *, int);
57
58 /*
59 * Using `statep', send a query request for `type' to in.mpathd, and if
60 * necessary wait until at least `endtp' for a response. Returns an IPMP
61 * error code. If successful, the caller may then read additional query
62 * information through ipmp_readinfo(), and must eventually call
63 * ipmp_querydone() to complete the query operation. Only one query may be
64 * outstanding on a given `statep' at a time.
65 */
66 static int
ipmp_sendquery(ipmp_state_t * statep,ipmp_infotype_t type,const char * name,const void * addr,struct timeval * endtp)67 ipmp_sendquery(ipmp_state_t *statep, ipmp_infotype_t type, const char *name,
68 const void *addr, struct timeval *endtp)
69 {
70 mi_query_t query;
71 mi_result_t result;
72 int retval;
73
74 query.miq_command = MI_QUERY;
75 query.miq_inforeq = type;
76
77 switch (type) {
78 case IPMP_ADDRINFO:
79 (void) strlcpy(query.miq_grname, name, LIFGRNAMSIZ);
80 query.miq_addr = *(struct sockaddr_storage *)addr;
81 break;
82
83 case IPMP_GROUPINFO:
84 (void) strlcpy(query.miq_grname, name, LIFGRNAMSIZ);
85 break;
86
87 case IPMP_IFINFO:
88 (void) strlcpy(query.miq_ifname, name, LIFNAMSIZ);
89 break;
90
91 case IPMP_GROUPLIST:
92 case IPMP_SNAP:
93 break;
94
95 default:
96 assert(0);
97 }
98
99 if (gettimeofday(endtp, NULL) == -1)
100 return (IPMP_FAILURE);
101
102 endtp->tv_sec += IPMP_REQTIMEOUT;
103
104 assert(statep->st_fd == -1);
105 retval = ipmp_connect(&statep->st_fd);
106 if (retval != IPMP_SUCCESS)
107 return (retval);
108
109 retval = ipmp_write(statep->st_fd, &query, sizeof (query));
110 if (retval != IPMP_SUCCESS)
111 return (ipmp_querydone(statep, retval));
112
113 retval = ipmp_read(statep->st_fd, &result, sizeof (result), endtp);
114 if (retval != IPMP_SUCCESS)
115 return (ipmp_querydone(statep, retval));
116
117 if (result.me_mpathd_error != IPMP_SUCCESS)
118 return (ipmp_querydone(statep, result.me_mpathd_error));
119
120 return (IPMP_SUCCESS);
121 }
122
123 /*
124 * Using `statep', read a query response of type `infotype' into a dynamically
125 * allocated buffer pointed to by `*infop', before the current time becomes
126 * `endtp'. Returns an IPMP error code.
127 */
128 static int
ipmp_readinfo(ipmp_state_t * statep,ipmp_infotype_t infotype,void ** infop,const struct timeval * endtp)129 ipmp_readinfo(ipmp_state_t *statep, ipmp_infotype_t infotype, void **infop,
130 const struct timeval *endtp)
131 {
132 int retval;
133 size_t len;
134 ipmp_infotype_t type;
135
136 retval = ipmp_readtlv(statep->st_fd, &type, &len, infop, endtp);
137 if (retval != IPMP_SUCCESS)
138 return (retval);
139
140 if (type != infotype || !ipmp_checktlv(type, len, *infop)) {
141 free(*infop);
142 return (IPMP_EPROTO);
143 }
144
145 return (IPMP_SUCCESS);
146 }
147
148 /*
149 * Using `statep', read in the remaining IPMP group information TLVs from
150 * in.mpathd into `grinfop' before the current time becomes `endtp'. Returns
151 * an IPMP error code. On failure, `grinfop' will have its original contents.
152 */
153 static int
ipmp_readgroupinfo_lists(ipmp_state_t * statep,ipmp_groupinfo_t * grinfop,const struct timeval * endtp)154 ipmp_readgroupinfo_lists(ipmp_state_t *statep, ipmp_groupinfo_t *grinfop,
155 const struct timeval *endtp)
156 {
157 int retval;
158 ipmp_iflist_t *iflistp;
159 ipmp_addrlist_t *adlistp;
160
161 retval = ipmp_readinfo(statep, IPMP_IFLIST, (void **)&iflistp, endtp);
162 if (retval != IPMP_SUCCESS)
163 return (retval);
164
165 retval = ipmp_readinfo(statep, IPMP_ADDRLIST, (void **)&adlistp, endtp);
166 if (retval != IPMP_SUCCESS) {
167 ipmp_freeiflist(iflistp);
168 return (retval);
169 }
170
171 grinfop->gr_iflistp = iflistp;
172 grinfop->gr_adlistp = adlistp;
173 return (IPMP_SUCCESS);
174 }
175
176 /*
177 * Using `statep', read in the remaining IPMP interface information TLVs from
178 * in.mpathd into `ifinfop' before the current time becomes `endtp'. Returns
179 * an IPMP error code. On failure, `ifinfop' will have its original contents.
180 */
181 static int
ipmp_readifinfo_lists(ipmp_state_t * statep,ipmp_ifinfo_t * ifinfop,const struct timeval * endtp)182 ipmp_readifinfo_lists(ipmp_state_t *statep, ipmp_ifinfo_t *ifinfop,
183 const struct timeval *endtp)
184 {
185 int retval;
186 ipmp_addrlist_t *tlist4p, *tlist6p;
187
188 retval = ipmp_readinfo(statep, IPMP_ADDRLIST, (void **)&tlist4p, endtp);
189 if (retval != IPMP_SUCCESS)
190 return (retval);
191
192 retval = ipmp_readinfo(statep, IPMP_ADDRLIST, (void **)&tlist6p, endtp);
193 if (retval != IPMP_SUCCESS) {
194 ipmp_freeaddrlist(tlist4p);
195 return (retval);
196 }
197
198 ifinfop->if_targinfo4.it_targlistp = tlist4p;
199 ifinfop->if_targinfo6.it_targlistp = tlist6p;
200 return (IPMP_SUCCESS);
201 }
202
203 /*
204 * Complete the query operation started in ipmp_sendquery(). The interface is
205 * designed to be easy to use in the `return' statement of a function, and
206 * thus returns the passed in `retval' and preserves `errno'.
207 */
208 static int
ipmp_querydone(ipmp_state_t * statep,int retval)209 ipmp_querydone(ipmp_state_t *statep, int retval)
210 {
211 int error = errno;
212
213 (void) close(statep->st_fd);
214 statep->st_fd = -1;
215 errno = error;
216 return (retval);
217 }
218
219 /*
220 * Using `handle', get the group list and store the results in a dynamically
221 * allocated buffer pointed to by `*grlistpp'. Returns an IPMP error code.
222 */
223 int
ipmp_getgrouplist(ipmp_handle_t handle,ipmp_grouplist_t ** grlistpp)224 ipmp_getgrouplist(ipmp_handle_t handle, ipmp_grouplist_t **grlistpp)
225 {
226 ipmp_state_t *statep = handle;
227 struct timeval end;
228 int retval;
229
230 if (statep->st_snap != NULL) {
231 *grlistpp = ipmp_grouplist_clone(statep->st_snap->sn_grlistp);
232 return (*grlistpp != NULL ? IPMP_SUCCESS : IPMP_ENOMEM);
233 }
234
235 retval = ipmp_sendquery(statep, IPMP_GROUPLIST, NULL, NULL, &end);
236 if (retval != IPMP_SUCCESS)
237 return (retval);
238
239 retval = ipmp_readinfo(statep, IPMP_GROUPLIST, (void **)grlistpp, &end);
240 return (ipmp_querydone(statep, retval));
241 }
242
243 /*
244 * Free the group list pointed to by `grlistp'.
245 */
246 void
ipmp_freegrouplist(ipmp_grouplist_t * grlistp)247 ipmp_freegrouplist(ipmp_grouplist_t *grlistp)
248 {
249 free(grlistp);
250 }
251
252 /*
253 * Using `handle', get the group information associated with group `name' and
254 * store the results in a dynamically allocated buffer pointed to by
255 * `*grinfopp'. Returns an IPMP error code.
256 */
257 int
ipmp_getgroupinfo(ipmp_handle_t handle,const char * name,ipmp_groupinfo_t ** grinfopp)258 ipmp_getgroupinfo(ipmp_handle_t handle, const char *name,
259 ipmp_groupinfo_t **grinfopp)
260 {
261 ipmp_state_t *statep = handle;
262 int retval;
263 struct timeval end;
264 ipmp_groupinfo_t *grinfop;
265
266 if (statep->st_snap != NULL) {
267 grinfop = ipmp_snap_getgroupinfo(statep->st_snap, name);
268 if (grinfop == NULL)
269 return (IPMP_EUNKGROUP);
270
271 *grinfopp = ipmp_groupinfo_clone(grinfop);
272 return (*grinfopp != NULL ? IPMP_SUCCESS : IPMP_ENOMEM);
273 }
274
275 retval = ipmp_sendquery(statep, IPMP_GROUPINFO, name, NULL, &end);
276 if (retval != IPMP_SUCCESS)
277 return (retval);
278
279 retval = ipmp_readinfo(statep, IPMP_GROUPINFO, (void **)grinfopp, &end);
280 if (retval != IPMP_SUCCESS)
281 return (ipmp_querydone(statep, retval));
282
283 retval = ipmp_readgroupinfo_lists(statep, *grinfopp, &end);
284 if (retval != IPMP_SUCCESS)
285 free(*grinfopp);
286
287 return (ipmp_querydone(statep, retval));
288 }
289
290 /*
291 * Free the group information pointed to by `grinfop'.
292 */
293 void
ipmp_freegroupinfo(ipmp_groupinfo_t * grinfop)294 ipmp_freegroupinfo(ipmp_groupinfo_t *grinfop)
295 {
296 ipmp_freeaddrlist(grinfop->gr_adlistp);
297 ipmp_freeiflist(grinfop->gr_iflistp);
298 free(grinfop);
299 }
300
301 /*
302 * Using `handle', get the interface information associated with interface
303 * `name' and store the results in a dynamically allocated buffer pointed to
304 * by `*ifinfopp'. Returns an IPMP error code.
305 */
306 int
ipmp_getifinfo(ipmp_handle_t handle,const char * name,ipmp_ifinfo_t ** ifinfopp)307 ipmp_getifinfo(ipmp_handle_t handle, const char *name, ipmp_ifinfo_t **ifinfopp)
308 {
309 ipmp_state_t *statep = handle;
310 ipmp_ifinfo_t *ifinfop;
311 int retval;
312 struct timeval end;
313
314 if (statep->st_snap != NULL) {
315 ifinfop = ipmp_snap_getifinfo(statep->st_snap, name);
316 if (ifinfop == NULL)
317 return (IPMP_EUNKIF);
318
319 *ifinfopp = ipmp_ifinfo_clone(ifinfop);
320 return (*ifinfopp != NULL ? IPMP_SUCCESS : IPMP_ENOMEM);
321 }
322
323 retval = ipmp_sendquery(statep, IPMP_IFINFO, name, NULL, &end);
324 if (retval != IPMP_SUCCESS)
325 return (retval);
326
327 retval = ipmp_readinfo(statep, IPMP_IFINFO, (void **)ifinfopp, &end);
328 if (retval != IPMP_SUCCESS)
329 return (ipmp_querydone(statep, retval));
330
331 retval = ipmp_readifinfo_lists(statep, *ifinfopp, &end);
332 if (retval != IPMP_SUCCESS)
333 free(*ifinfopp);
334
335 return (ipmp_querydone(statep, retval));
336 }
337
338 /*
339 * Free the interface information pointed to by `ifinfop'.
340 */
341 void
ipmp_freeifinfo(ipmp_ifinfo_t * ifinfop)342 ipmp_freeifinfo(ipmp_ifinfo_t *ifinfop)
343 {
344 ipmp_freeaddrlist(ifinfop->if_targinfo4.it_targlistp);
345 ipmp_freeaddrlist(ifinfop->if_targinfo6.it_targlistp);
346 free(ifinfop);
347 }
348
349 /*
350 * Using `handle', get the address information associated with address `addrp'
351 * on group `grname' and store the results in a dynamically allocated buffer
352 * pointed to by `*adinfopp'. Returns an IPMP error code.
353 */
354 int
ipmp_getaddrinfo(ipmp_handle_t handle,const char * grname,struct sockaddr_storage * addrp,ipmp_addrinfo_t ** adinfopp)355 ipmp_getaddrinfo(ipmp_handle_t handle, const char *grname,
356 struct sockaddr_storage *addrp, ipmp_addrinfo_t **adinfopp)
357 {
358 ipmp_state_t *statep = handle;
359 ipmp_addrinfo_t *adinfop;
360 int retval;
361 struct timeval end;
362
363 if (statep->st_snap != NULL) {
364 adinfop = ipmp_snap_getaddrinfo(statep->st_snap, grname, addrp);
365 if (adinfop == NULL)
366 return (IPMP_EUNKADDR);
367
368 *adinfopp = ipmp_addrinfo_clone(adinfop);
369 return (*adinfopp != NULL ? IPMP_SUCCESS : IPMP_ENOMEM);
370 }
371
372 retval = ipmp_sendquery(statep, IPMP_ADDRINFO, grname, addrp, &end);
373 if (retval != IPMP_SUCCESS)
374 return (retval);
375
376 retval = ipmp_readinfo(statep, IPMP_ADDRINFO, (void **)adinfopp, &end);
377 return (ipmp_querydone(statep, retval));
378 }
379
380 /*
381 * Free the address information pointed to by `adinfop'.
382 */
383 void
ipmp_freeaddrinfo(ipmp_addrinfo_t * adinfop)384 ipmp_freeaddrinfo(ipmp_addrinfo_t *adinfop)
385 {
386 free(adinfop);
387 }
388
389 /*
390 * Check if `buf' has a NUL byte in its first `bufsize' bytes.
391 */
392 static boolean_t
hasnulbyte(const char * buf,size_t bufsize)393 hasnulbyte(const char *buf, size_t bufsize)
394 {
395 while (bufsize-- > 0) {
396 if (buf[bufsize] == '\0')
397 return (B_TRUE);
398 }
399 return (B_FALSE);
400 }
401
402 /*
403 * Check that the TLV triplet named by `type', `len' and `value' is correctly
404 * formed.
405 */
406 static boolean_t
ipmp_checktlv(ipmp_infotype_t type,size_t len,void * value)407 ipmp_checktlv(ipmp_infotype_t type, size_t len, void *value)
408 {
409 ipmp_iflist_t *iflistp;
410 ipmp_ifinfo_t *ifinfop;
411 ipmp_grouplist_t *grlistp;
412 ipmp_groupinfo_t *grinfop;
413 ipmp_addrlist_t *adlistp;
414 unsigned int i;
415
416 switch (type) {
417 case IPMP_ADDRINFO:
418 if (len != sizeof (ipmp_addrinfo_t))
419 return (B_FALSE);
420 break;
421
422 case IPMP_ADDRLIST:
423 adlistp = (ipmp_addrlist_t *)value;
424 if (len < IPMP_ADDRLIST_SIZE(0) ||
425 len < IPMP_ADDRLIST_SIZE(adlistp->al_naddr))
426 return (B_FALSE);
427 break;
428
429 case IPMP_IFLIST:
430 iflistp = (ipmp_iflist_t *)value;
431 if (len < IPMP_IFLIST_SIZE(0) ||
432 len < IPMP_IFLIST_SIZE(iflistp->il_nif))
433 return (B_FALSE);
434
435 for (i = 0; i < iflistp->il_nif; i++)
436 if (!hasnulbyte(iflistp->il_ifs[i], LIFNAMSIZ))
437 return (B_FALSE);
438 break;
439
440 case IPMP_IFINFO:
441 ifinfop = (ipmp_ifinfo_t *)value;
442 if (len != sizeof (ipmp_ifinfo_t))
443 return (B_FALSE);
444
445 if (!hasnulbyte(ifinfop->if_name, LIFNAMSIZ) ||
446 !hasnulbyte(ifinfop->if_group, LIFGRNAMSIZ))
447 return (B_FALSE);
448 break;
449
450 case IPMP_GROUPLIST:
451 grlistp = (ipmp_grouplist_t *)value;
452 if (len < IPMP_GROUPLIST_SIZE(0) ||
453 len < IPMP_GROUPLIST_SIZE(grlistp->gl_ngroup))
454 return (B_FALSE);
455
456 for (i = 0; i < grlistp->gl_ngroup; i++)
457 if (!hasnulbyte(grlistp->gl_groups[i], LIFGRNAMSIZ))
458 return (B_FALSE);
459 break;
460
461 case IPMP_GROUPINFO:
462 grinfop = (ipmp_groupinfo_t *)value;
463 if (len != sizeof (ipmp_groupinfo_t))
464 return (B_FALSE);
465
466 if (!hasnulbyte(grinfop->gr_name, LIFGRNAMSIZ))
467 return (B_FALSE);
468 break;
469
470 case IPMP_SNAP:
471 if (len != sizeof (ipmp_snap_t))
472 return (B_FALSE);
473 break;
474
475 default:
476 return (B_FALSE);
477 }
478
479 return (B_TRUE);
480 }
481
482 /*
483 * Create a group list; arguments match ipmp_grouplist_t fields. Returns a
484 * pointer to the new group list on success, or NULL on failure.
485 */
486 ipmp_grouplist_t *
ipmp_grouplist_create(uint64_t sig,unsigned int ngroup,char (* groups)[LIFGRNAMSIZ])487 ipmp_grouplist_create(uint64_t sig, unsigned int ngroup,
488 char (*groups)[LIFGRNAMSIZ])
489 {
490 unsigned int i;
491 ipmp_grouplist_t *grlistp;
492
493 grlistp = malloc(IPMP_GROUPLIST_SIZE(ngroup));
494 if (grlistp == NULL)
495 return (NULL);
496
497 grlistp->gl_sig = sig;
498 grlistp->gl_ngroup = ngroup;
499 for (i = 0; i < ngroup; i++)
500 (void) strlcpy(grlistp->gl_groups[i], groups[i], LIFGRNAMSIZ);
501
502 return (grlistp);
503 }
504
505 /*
506 * Clone the group list named by `grlistp'. Returns a pointer to the clone on
507 * success, or NULL on failure.
508 */
509 ipmp_grouplist_t *
ipmp_grouplist_clone(ipmp_grouplist_t * grlistp)510 ipmp_grouplist_clone(ipmp_grouplist_t *grlistp)
511 {
512 return (ipmp_grouplist_create(grlistp->gl_sig, grlistp->gl_ngroup,
513 grlistp->gl_groups));
514 }
515
516 /*
517 * Create target information; arguments match ipmp_targinfo_t fields. Returns
518 * a pointer to the new target info on success, or NULL on failure.
519 */
520 ipmp_targinfo_t *
ipmp_targinfo_create(const char * name,struct sockaddr_storage * testaddrp,ipmp_if_targmode_t targmode,uint_t ntarg,struct sockaddr_storage * targs)521 ipmp_targinfo_create(const char *name, struct sockaddr_storage *testaddrp,
522 ipmp_if_targmode_t targmode, uint_t ntarg, struct sockaddr_storage *targs)
523 {
524 ipmp_targinfo_t *targinfop;
525
526 targinfop = malloc(sizeof (ipmp_targinfo_t));
527 if (targinfop == NULL)
528 return (NULL);
529
530 targinfop->it_testaddr = *testaddrp;
531 targinfop->it_targmode = targmode;
532 targinfop->it_targlistp = ipmp_addrlist_create(ntarg, targs);
533 if (targinfop->it_targlistp == NULL) {
534 ipmp_freetarginfo(targinfop);
535 return (NULL);
536 }
537 (void) strlcpy(targinfop->it_name, name, LIFNAMSIZ);
538
539 return (targinfop);
540 }
541
542 /*
543 * Free the target information pointed to by `targinfop'.
544 */
545 void
ipmp_freetarginfo(ipmp_targinfo_t * targinfop)546 ipmp_freetarginfo(ipmp_targinfo_t *targinfop)
547 {
548 free(targinfop->it_targlistp);
549 free(targinfop);
550 }
551
552 /*
553 * Create an interface list; arguments match ipmp_iflist_t fields. Returns a
554 * pointer to the new interface list on success, or NULL on failure.
555 */
556 static ipmp_iflist_t *
ipmp_iflist_create(uint_t nif,char (* ifs)[LIFNAMSIZ])557 ipmp_iflist_create(uint_t nif, char (*ifs)[LIFNAMSIZ])
558 {
559 unsigned int i;
560 ipmp_iflist_t *iflistp;
561
562 iflistp = malloc(IPMP_IFLIST_SIZE(nif));
563 if (iflistp == NULL)
564 return (NULL);
565
566 iflistp->il_nif = nif;
567 for (i = 0; i < nif; i++)
568 (void) strlcpy(iflistp->il_ifs[i], ifs[i], LIFNAMSIZ);
569
570 return (iflistp);
571 }
572
573 /*
574 * Free the interface list pointed to by `iflistp'.
575 */
576 static void
ipmp_freeiflist(ipmp_iflist_t * iflistp)577 ipmp_freeiflist(ipmp_iflist_t *iflistp)
578 {
579 free(iflistp);
580 }
581
582 /*
583 * Create an interface; arguments match ipmp_ifinfo_t fields. Returns a
584 * pointer to the new interface on success, or NULL on failure.
585 */
586 ipmp_ifinfo_t *
ipmp_ifinfo_create(const char * name,const char * group,ipmp_if_state_t state,ipmp_if_type_t type,ipmp_if_linkstate_t linkstate,ipmp_if_probestate_t probestate,ipmp_if_flags_t flags,ipmp_targinfo_t * targinfo4p,ipmp_targinfo_t * targinfo6p)587 ipmp_ifinfo_create(const char *name, const char *group, ipmp_if_state_t state,
588 ipmp_if_type_t type, ipmp_if_linkstate_t linkstate,
589 ipmp_if_probestate_t probestate, ipmp_if_flags_t flags,
590 ipmp_targinfo_t *targinfo4p, ipmp_targinfo_t *targinfo6p)
591 {
592 ipmp_ifinfo_t *ifinfop;
593
594 ifinfop = malloc(sizeof (ipmp_ifinfo_t));
595 if (ifinfop == NULL)
596 return (NULL);
597
598 (void) strlcpy(ifinfop->if_name, name, LIFNAMSIZ);
599 (void) strlcpy(ifinfop->if_group, group, LIFGRNAMSIZ);
600
601 ifinfop->if_state = state;
602 ifinfop->if_type = type;
603 ifinfop->if_linkstate = linkstate;
604 ifinfop->if_probestate = probestate;
605 ifinfop->if_flags = flags;
606 ifinfop->if_targinfo4 = *targinfo4p;
607 ifinfop->if_targinfo6 = *targinfo6p;
608
609 ifinfop->if_targinfo4.it_targlistp =
610 ipmp_addrlist_clone(targinfo4p->it_targlistp);
611 ifinfop->if_targinfo6.it_targlistp =
612 ipmp_addrlist_clone(targinfo6p->it_targlistp);
613
614 if (ifinfop->if_targinfo4.it_targlistp == NULL ||
615 ifinfop->if_targinfo6.it_targlistp == NULL) {
616 ipmp_freeifinfo(ifinfop);
617 return (NULL);
618 }
619
620 return (ifinfop);
621 }
622
623 /*
624 * Clone the interface information named by `ifinfop'. Returns a pointer to
625 * the clone on success, or NULL on failure.
626 */
627 ipmp_ifinfo_t *
ipmp_ifinfo_clone(ipmp_ifinfo_t * ifinfop)628 ipmp_ifinfo_clone(ipmp_ifinfo_t *ifinfop)
629 {
630 return (ipmp_ifinfo_create(ifinfop->if_name, ifinfop->if_group,
631 ifinfop->if_state, ifinfop->if_type, ifinfop->if_linkstate,
632 ifinfop->if_probestate, ifinfop->if_flags, &ifinfop->if_targinfo4,
633 &ifinfop->if_targinfo6));
634 }
635
636 /*
637 * Create a group; arguments match ipmp_groupinfo_t fields. Returns a pointer
638 * to the new group on success, or NULL on failure.
639 */
640 ipmp_groupinfo_t *
ipmp_groupinfo_create(const char * name,uint64_t sig,uint_t fdt,ipmp_group_state_t state,uint_t nif,char (* ifs)[LIFNAMSIZ],const char * grifname,const char * m4ifname,const char * m6ifname,const char * bcifname,uint_t naddr,struct sockaddr_storage * addrs)641 ipmp_groupinfo_create(const char *name, uint64_t sig, uint_t fdt,
642 ipmp_group_state_t state, uint_t nif, char (*ifs)[LIFNAMSIZ],
643 const char *grifname, const char *m4ifname, const char *m6ifname,
644 const char *bcifname, uint_t naddr, struct sockaddr_storage *addrs)
645 {
646 ipmp_groupinfo_t *grinfop;
647
648 grinfop = malloc(sizeof (ipmp_groupinfo_t));
649 if (grinfop == NULL)
650 return (NULL);
651
652 grinfop->gr_sig = sig;
653 grinfop->gr_fdt = fdt;
654 grinfop->gr_state = state;
655 grinfop->gr_iflistp = ipmp_iflist_create(nif, ifs);
656 grinfop->gr_adlistp = ipmp_addrlist_create(naddr, addrs);
657 if (grinfop->gr_iflistp == NULL || grinfop->gr_adlistp == NULL) {
658 ipmp_freegroupinfo(grinfop);
659 return (NULL);
660 }
661 (void) strlcpy(grinfop->gr_name, name, LIFGRNAMSIZ);
662 (void) strlcpy(grinfop->gr_ifname, grifname, LIFNAMSIZ);
663 (void) strlcpy(grinfop->gr_m4ifname, m4ifname, LIFNAMSIZ);
664 (void) strlcpy(grinfop->gr_m6ifname, m6ifname, LIFNAMSIZ);
665 (void) strlcpy(grinfop->gr_bcifname, bcifname, LIFNAMSIZ);
666
667 return (grinfop);
668 }
669
670 /*
671 * Clone the group information named by `grinfop'. Returns a pointer to
672 * the clone on success, or NULL on failure.
673 */
674 ipmp_groupinfo_t *
ipmp_groupinfo_clone(ipmp_groupinfo_t * grinfop)675 ipmp_groupinfo_clone(ipmp_groupinfo_t *grinfop)
676 {
677 ipmp_addrlist_t *adlistp = grinfop->gr_adlistp;
678
679 return (ipmp_groupinfo_create(grinfop->gr_name, grinfop->gr_sig,
680 grinfop->gr_fdt, grinfop->gr_state, grinfop->gr_iflistp->il_nif,
681 grinfop->gr_iflistp->il_ifs, grinfop->gr_ifname,
682 grinfop->gr_m4ifname, grinfop->gr_m6ifname, grinfop->gr_bcifname,
683 adlistp->al_naddr, adlistp->al_addrs));
684 }
685
686 /*
687 * Create an address list; arguments match ipmp_addrlist_t fields. Returns
688 * a pointer to the new address list on success, or NULL on failure.
689 */
690 static ipmp_addrlist_t *
ipmp_addrlist_create(uint_t naddr,struct sockaddr_storage * addrs)691 ipmp_addrlist_create(uint_t naddr, struct sockaddr_storage *addrs)
692 {
693 unsigned int i;
694 ipmp_addrlist_t *adlistp;
695
696 adlistp = malloc(IPMP_ADDRLIST_SIZE(naddr));
697 if (adlistp == NULL)
698 return (NULL);
699
700 adlistp->al_naddr = naddr;
701 for (i = 0; i < naddr; i++)
702 adlistp->al_addrs[i] = addrs[i];
703
704 return (adlistp);
705 }
706
707 /*
708 * Clone the address list named by `adlistp'. Returns a pointer to the clone
709 * on success, or NULL on failure.
710 */
711 static ipmp_addrlist_t *
ipmp_addrlist_clone(ipmp_addrlist_t * adlistp)712 ipmp_addrlist_clone(ipmp_addrlist_t *adlistp)
713 {
714 return (ipmp_addrlist_create(adlistp->al_naddr, adlistp->al_addrs));
715 }
716
717 /*
718 * Free the address list pointed to by `adlistp'.
719 */
720 static void
ipmp_freeaddrlist(ipmp_addrlist_t * adlistp)721 ipmp_freeaddrlist(ipmp_addrlist_t *adlistp)
722 {
723 free(adlistp);
724 }
725
726 /*
727 * Create an address; arguments match ipmp_addrinfo_t fields. Returns a
728 * pointer to the new address on success, or NULL on failure.
729 */
730 ipmp_addrinfo_t *
ipmp_addrinfo_create(struct sockaddr_storage * addrp,ipmp_addr_state_t state,const char * group,const char * binding)731 ipmp_addrinfo_create(struct sockaddr_storage *addrp, ipmp_addr_state_t state,
732 const char *group, const char *binding)
733 {
734 ipmp_addrinfo_t *adinfop;
735
736 adinfop = malloc(sizeof (ipmp_addrinfo_t));
737 if (adinfop == NULL)
738 return (NULL);
739
740 adinfop->ad_addr = *addrp;
741 adinfop->ad_state = state;
742 (void) strlcpy(adinfop->ad_group, group, LIFGRNAMSIZ);
743 (void) strlcpy(adinfop->ad_binding, binding, LIFNAMSIZ);
744
745 return (adinfop);
746 }
747
748 /*
749 * Clone the address information named by `adinfop'. Returns a pointer to
750 * the clone on success, or NULL on failure.
751 */
752 ipmp_addrinfo_t *
ipmp_addrinfo_clone(ipmp_addrinfo_t * adinfop)753 ipmp_addrinfo_clone(ipmp_addrinfo_t *adinfop)
754 {
755 return (ipmp_addrinfo_create(&adinfop->ad_addr, adinfop->ad_state,
756 adinfop->ad_group, adinfop->ad_binding));
757 }
758
759 /*
760 * Set the query context associated with `handle' to `qcontext', which must be
761 * either IPMP_QCONTEXT_LIVE or IPMP_QCONTEXT_SNAP. Upon success, any
762 * previous snapshot associated with `handle' is discarded. Returns an IPMP
763 * error code.
764 */
765 int
ipmp_setqcontext(ipmp_handle_t handle,ipmp_qcontext_t qcontext)766 ipmp_setqcontext(ipmp_handle_t handle, ipmp_qcontext_t qcontext)
767 {
768 ipmp_state_t *statep = handle;
769 ipmp_snap_t *snap;
770 int retval;
771
772 switch (qcontext) {
773 case IPMP_QCONTEXT_LIVE:
774 snap = NULL;
775 break;
776
777 case IPMP_QCONTEXT_SNAP:
778 retval = ipmp_snap_take(statep, &snap);
779 if (retval != IPMP_SUCCESS)
780 return (retval);
781 break;
782
783 default:
784 return (IPMP_EINVAL);
785 }
786
787 if (statep->st_snap != NULL)
788 ipmp_snap_free(statep->st_snap);
789 statep->st_snap = snap;
790
791 return (IPMP_SUCCESS);
792 }
793
794 /*
795 * Create an empty snapshot. Returns a pointer to the snapshot on success,
796 * or NULL on failure.
797 */
798 ipmp_snap_t *
ipmp_snap_create(void)799 ipmp_snap_create(void)
800 {
801 ipmp_snap_t *snap;
802
803 snap = malloc(sizeof (ipmp_snap_t));
804 if (snap == NULL)
805 return (NULL);
806
807 snap->sn_grlistp = NULL;
808 snap->sn_grinfolistp = NULL;
809 snap->sn_ifinfolistp = NULL;
810 snap->sn_adinfolistp = NULL;
811 snap->sn_ngroup = 0;
812 snap->sn_nif = 0;
813 snap->sn_naddr = 0;
814
815 return (snap);
816 }
817
818 /*
819 * Free all of the resources associated with snapshot `snap'.
820 */
821 void
ipmp_snap_free(ipmp_snap_t * snap)822 ipmp_snap_free(ipmp_snap_t *snap)
823 {
824 ipmp_ifinfolist_t *iflp, *ifnext;
825 ipmp_addrinfolist_t *adlp, *adnext;
826 ipmp_groupinfolist_t *grlp, *grnext;
827
828 ipmp_freegrouplist(snap->sn_grlistp);
829
830 for (grlp = snap->sn_grinfolistp; grlp != NULL; grlp = grnext) {
831 grnext = grlp->grl_next;
832 ipmp_freegroupinfo(grlp->grl_grinfop);
833 free(grlp);
834 }
835
836 for (iflp = snap->sn_ifinfolistp; iflp != NULL; iflp = ifnext) {
837 ifnext = iflp->ifl_next;
838 ipmp_freeifinfo(iflp->ifl_ifinfop);
839 free(iflp);
840 }
841
842 for (adlp = snap->sn_adinfolistp; adlp != NULL; adlp = adnext) {
843 adnext = adlp->adl_next;
844 ipmp_freeaddrinfo(adlp->adl_adinfop);
845 free(adlp);
846 }
847
848 free(snap);
849 }
850
851 /*
852 * Add the group information in `grinfop' to the snapshot named by `snap'.
853 * Returns an IPMP error code.
854 */
855 int
ipmp_snap_addgroupinfo(ipmp_snap_t * snap,ipmp_groupinfo_t * grinfop)856 ipmp_snap_addgroupinfo(ipmp_snap_t *snap, ipmp_groupinfo_t *grinfop)
857 {
858 ipmp_groupinfolist_t *grlp;
859
860 /*
861 * If the information for this group is already in the snapshot,
862 * in.mpathd is broken.
863 */
864 if (ipmp_snap_getgroupinfo(snap, grinfop->gr_name) != NULL)
865 return (IPMP_EPROTO);
866
867 grlp = malloc(sizeof (ipmp_groupinfolist_t));
868 if (grlp == NULL)
869 return (IPMP_ENOMEM);
870
871 grlp->grl_grinfop = grinfop;
872 grlp->grl_next = snap->sn_grinfolistp;
873 snap->sn_grinfolistp = grlp;
874 snap->sn_ngroup++;
875
876 return (IPMP_SUCCESS);
877 }
878
879 /*
880 * Add the interface information in `ifinfop' to the snapshot named by `snap'.
881 * Returns an IPMP error code.
882 */
883 int
ipmp_snap_addifinfo(ipmp_snap_t * snap,ipmp_ifinfo_t * ifinfop)884 ipmp_snap_addifinfo(ipmp_snap_t *snap, ipmp_ifinfo_t *ifinfop)
885 {
886 ipmp_ifinfolist_t *iflp;
887
888 /*
889 * If the information for this interface is already in the snapshot,
890 * in.mpathd is broken.
891 */
892 if (ipmp_snap_getifinfo(snap, ifinfop->if_name) != NULL)
893 return (IPMP_EPROTO);
894
895 iflp = malloc(sizeof (ipmp_ifinfolist_t));
896 if (iflp == NULL)
897 return (IPMP_ENOMEM);
898
899 iflp->ifl_ifinfop = ifinfop;
900 iflp->ifl_next = snap->sn_ifinfolistp;
901 snap->sn_ifinfolistp = iflp;
902 snap->sn_nif++;
903
904 return (IPMP_SUCCESS);
905 }
906
907 /*
908 * Add the address information in `adinfop' to the snapshot named by `snap'.
909 * Returns an IPMP error code.
910 */
911 int
ipmp_snap_addaddrinfo(ipmp_snap_t * snap,ipmp_addrinfo_t * adinfop)912 ipmp_snap_addaddrinfo(ipmp_snap_t *snap, ipmp_addrinfo_t *adinfop)
913 {
914 ipmp_addrinfolist_t *adlp;
915
916 /*
917 * Any duplicate addresses should've already been weeded by in.mpathd.
918 */
919 if (ipmp_snap_getaddrinfo(snap, adinfop->ad_group,
920 &adinfop->ad_addr) != NULL)
921 return (IPMP_EPROTO);
922
923 adlp = malloc(sizeof (ipmp_addrinfolist_t));
924 if (adlp == NULL)
925 return (IPMP_ENOMEM);
926
927 adlp->adl_adinfop = adinfop;
928 adlp->adl_next = snap->sn_adinfolistp;
929 snap->sn_adinfolistp = adlp;
930 snap->sn_naddr++;
931
932 return (IPMP_SUCCESS);
933 }
934
935 /*
936 * Retrieve the information for the group `name' in snapshot `snap'.
937 * Returns a pointer to the group information on success, or NULL on failure.
938 */
939 static ipmp_groupinfo_t *
ipmp_snap_getgroupinfo(ipmp_snap_t * snap,const char * name)940 ipmp_snap_getgroupinfo(ipmp_snap_t *snap, const char *name)
941 {
942 ipmp_groupinfolist_t *grlp;
943
944 for (grlp = snap->sn_grinfolistp; grlp != NULL; grlp = grlp->grl_next) {
945 if (strcmp(grlp->grl_grinfop->gr_name, name) == 0)
946 break;
947 }
948
949 return (grlp != NULL ? grlp->grl_grinfop : NULL);
950 }
951
952 /*
953 * Retrieve the information for the interface `name' in snapshot `snap'.
954 * Returns a pointer to the interface information on success, or NULL on
955 * failure.
956 */
957 static ipmp_ifinfo_t *
ipmp_snap_getifinfo(ipmp_snap_t * snap,const char * name)958 ipmp_snap_getifinfo(ipmp_snap_t *snap, const char *name)
959 {
960 ipmp_ifinfolist_t *iflp;
961
962 for (iflp = snap->sn_ifinfolistp; iflp != NULL; iflp = iflp->ifl_next) {
963 if (strcmp(iflp->ifl_ifinfop->if_name, name) == 0)
964 break;
965 }
966
967 return (iflp != NULL ? iflp->ifl_ifinfop : NULL);
968 }
969
970 /*
971 * Retrieve the information for the address `addrp' on group `grname' in
972 * snapshot `snap'. Returns a pointer to the address information on success,
973 * or NULL on failure.
974 */
975 static ipmp_addrinfo_t *
ipmp_snap_getaddrinfo(ipmp_snap_t * snap,const char * grname,struct sockaddr_storage * addrp)976 ipmp_snap_getaddrinfo(ipmp_snap_t *snap, const char *grname,
977 struct sockaddr_storage *addrp)
978 {
979 ipmp_addrinfolist_t *adlp;
980
981 for (adlp = snap->sn_adinfolistp; adlp != NULL; adlp = adlp->adl_next) {
982 if (strcmp(grname, adlp->adl_adinfop->ad_group) == 0 &&
983 sockaddrcmp(addrp, &adlp->adl_adinfop->ad_addr))
984 break;
985 }
986
987 return (adlp != NULL ? adlp->adl_adinfop : NULL);
988 }
989
990 /*
991 * Using `statep', take a snapshot of the IPMP subsystem and if successful
992 * return it in a dynamically allocated snapshot pointed to by `*snapp'.
993 * Returns an IPMP error code.
994 */
995 static int
ipmp_snap_take(ipmp_state_t * statep,ipmp_snap_t ** snapp)996 ipmp_snap_take(ipmp_state_t *statep, ipmp_snap_t **snapp)
997 {
998 ipmp_snap_t *snap, *osnap;
999 ipmp_infotype_t type;
1000 int retval;
1001 size_t len;
1002 void *infop;
1003 struct timeval end;
1004
1005 snap = ipmp_snap_create();
1006 if (snap == NULL)
1007 return (IPMP_ENOMEM);
1008
1009 retval = ipmp_sendquery(statep, IPMP_SNAP, NULL, NULL, &end);
1010 if (retval != IPMP_SUCCESS) {
1011 ipmp_snap_free(snap);
1012 return (retval);
1013 }
1014
1015 retval = ipmp_readinfo(statep, IPMP_SNAP, (void **)&osnap, &end);
1016 if (retval != IPMP_SUCCESS) {
1017 ipmp_snap_free(snap);
1018 return (ipmp_querydone(statep, retval));
1019 }
1020
1021 /*
1022 * Using the information in the `osnap' snapshot, build up our own
1023 * snapshot. We know there will always be at least one TLV (for
1024 * IPMP_GROUPLIST). If we receive anything illogical (e.g., more than
1025 * the expected number of interfaces), then bail out. However, to a
1026 * large extent we have to trust the information sent by in.mpathd.
1027 */
1028 do {
1029 infop = NULL;
1030 retval = ipmp_readtlv(statep->st_fd, &type, &len, &infop, &end);
1031 if (retval != IPMP_SUCCESS)
1032 goto fail;
1033
1034 if (!ipmp_checktlv(type, len, infop)) {
1035 retval = IPMP_EPROTO;
1036 goto fail;
1037 }
1038
1039 switch (type) {
1040 case IPMP_GROUPLIST:
1041 if (snap->sn_grlistp != NULL) {
1042 retval = IPMP_EPROTO;
1043 break;
1044 }
1045 snap->sn_grlistp = infop;
1046 break;
1047
1048 case IPMP_IFINFO:
1049 if (snap->sn_nif == osnap->sn_nif) {
1050 retval = IPMP_EPROTO;
1051 break;
1052 }
1053
1054 /*
1055 * Read in V4 and V6 targlist TLVs that follow.
1056 */
1057 retval = ipmp_readifinfo_lists(statep, infop, &end);
1058 if (retval != IPMP_SUCCESS)
1059 break;
1060
1061 retval = ipmp_snap_addifinfo(snap, infop);
1062 if (retval != IPMP_SUCCESS) {
1063 ipmp_freeifinfo(infop);
1064 infop = NULL;
1065 }
1066 break;
1067
1068 case IPMP_ADDRINFO:
1069 if (snap->sn_naddr == osnap->sn_naddr) {
1070 retval = IPMP_EPROTO;
1071 break;
1072 }
1073
1074 retval = ipmp_snap_addaddrinfo(snap, infop);
1075 /*
1076 * NOTE: since we didn't call ipmp_read*info_lists(),
1077 * no need to use ipmp_freeaddrinfo() on failure.
1078 */
1079 break;
1080
1081 case IPMP_GROUPINFO:
1082 if (snap->sn_ngroup == osnap->sn_ngroup) {
1083 retval = IPMP_EPROTO;
1084 break;
1085 }
1086
1087 /*
1088 * Read in IPMP groupinfo list TLVs that follow.
1089 */
1090 retval = ipmp_readgroupinfo_lists(statep, infop, &end);
1091 if (retval != IPMP_SUCCESS)
1092 break;
1093
1094 retval = ipmp_snap_addgroupinfo(snap, infop);
1095 if (retval != IPMP_SUCCESS) {
1096 ipmp_freegroupinfo(infop);
1097 infop = NULL;
1098 }
1099 break;
1100
1101 default:
1102 retval = IPMP_EPROTO;
1103 break;
1104 }
1105 fail:
1106 if (retval != IPMP_SUCCESS) {
1107 free(infop);
1108 free(osnap);
1109 ipmp_snap_free(snap);
1110 return (ipmp_querydone(statep, retval));
1111 }
1112 } while (snap->sn_grlistp == NULL || snap->sn_nif < osnap->sn_nif ||
1113 snap->sn_ngroup < osnap->sn_ngroup ||
1114 snap->sn_naddr < osnap->sn_naddr);
1115
1116 free(osnap);
1117 *snapp = snap;
1118 return (ipmp_querydone(statep, IPMP_SUCCESS));
1119 }
1120