1 /*
2 * Copyright (c) 2014 Yandex LLC
3 * Copyright (c) 2014 Alexander V. Chernikov
4 *
5 * Redistribution and use in source forms, with and without modification,
6 * are permitted provided that this entire comment appears intact.
7 *
8 * Redistribution in binary form may occur without any restrictions.
9 * Obviously, it would be nice if you gave credit where credit is due
10 * but requiring it would be too onerous.
11 *
12 * This software is provided ``AS IS'' without any warranties of any kind.
13 *
14 * in-kernel ipfw tables support.
15 */
16
17
18 #include <sys/types.h>
19 #include <sys/param.h>
20 #include <sys/socket.h>
21 #include <sys/sysctl.h>
22
23 #include <ctype.h>
24 #include <err.h>
25 #include <errno.h>
26 #include <netdb.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <sysexits.h>
31
32 #include <net/ethernet.h>
33 #include <net/if.h>
34 #include <netinet/in.h>
35 #include <netinet/ip_fw.h>
36 #include <arpa/inet.h>
37 #include <netdb.h>
38
39 #include "ipfw2.h"
40
41 static void table_modify_record(ipfw_obj_header *oh, int ac, char *av[],
42 int add, int quiet, int update, int atomic);
43 static int table_flush(ipfw_obj_header *oh);
44 static int table_destroy(ipfw_obj_header *oh);
45 static int table_do_create(ipfw_obj_header *oh, ipfw_xtable_info *i);
46 static int table_do_modify(ipfw_obj_header *oh, ipfw_xtable_info *i);
47 static int table_do_swap(ipfw_obj_header *oh, char *second);
48 static void table_create(ipfw_obj_header *oh, int ac, char *av[]);
49 static void table_modify(ipfw_obj_header *oh, int ac, char *av[]);
50 static void table_lookup(ipfw_obj_header *oh, int ac, char *av[]);
51 static void table_lock(ipfw_obj_header *oh, int lock);
52 static int table_swap(ipfw_obj_header *oh, char *second);
53 static int table_get_info(ipfw_obj_header *oh, ipfw_xtable_info *i);
54 static int table_show_info(ipfw_xtable_info *i, void *arg);
55
56 static int table_destroy_one(ipfw_xtable_info *i, void *arg);
57 static int table_flush_one(ipfw_xtable_info *i, void *arg);
58 static int table_show_one(ipfw_xtable_info *i, void *arg);
59 static int table_do_get_list(ipfw_xtable_info *i, ipfw_obj_header **poh);
60 static void table_show_list(ipfw_obj_header *oh, int need_header);
61 static void table_show_entry(ipfw_xtable_info *i, ipfw_obj_tentry *tent);
62
63 static void tentry_fill_key(ipfw_obj_header *oh, ipfw_obj_tentry *tent,
64 char *key, int add, uint8_t *ptype, uint32_t *pvmask, ipfw_xtable_info *xi);
65 static void tentry_fill_value(ipfw_obj_header *oh, ipfw_obj_tentry *tent,
66 char *arg, uint8_t type, uint32_t vmask);
67 static void table_show_value(char *buf, size_t bufsize, ipfw_table_value *v,
68 uint32_t vmask, int print_ip);
69
70 typedef int (table_cb_t)(ipfw_xtable_info *i, void *arg);
71 static int tables_foreach(table_cb_t *f, void *arg, int sort);
72
73 #ifndef s6_addr32
74 #define s6_addr32 __u6_addr.__u6_addr32
75 #endif
76
77 static struct _s_x tabletypes[] = {
78 { "addr", IPFW_TABLE_ADDR },
79 { "mac", IPFW_TABLE_MAC },
80 { "iface", IPFW_TABLE_INTERFACE },
81 { "number", IPFW_TABLE_NUMBER },
82 { "flow", IPFW_TABLE_FLOW },
83 { NULL, 0 }
84 };
85
86 /* Default algorithms for various table types */
87 static struct _s_x tablealgos[] = {
88 { "addr:radix", IPFW_TABLE_ADDR },
89 { "flow:hash", IPFW_TABLE_FLOW },
90 { "iface:array", IPFW_TABLE_INTERFACE },
91 { "number:array", IPFW_TABLE_NUMBER },
92 { NULL, 0 }
93 };
94
95 static struct _s_x tablevaltypes[] = {
96 { "skipto", IPFW_VTYPE_SKIPTO },
97 { "pipe", IPFW_VTYPE_PIPE },
98 { "fib", IPFW_VTYPE_FIB },
99 { "nat", IPFW_VTYPE_NAT },
100 { "dscp", IPFW_VTYPE_DSCP },
101 { "tag", IPFW_VTYPE_TAG },
102 { "divert", IPFW_VTYPE_DIVERT },
103 { "netgraph", IPFW_VTYPE_NETGRAPH },
104 { "limit", IPFW_VTYPE_LIMIT },
105 { "ipv4", IPFW_VTYPE_NH4 },
106 { "ipv6", IPFW_VTYPE_NH6 },
107 { "mark", IPFW_VTYPE_MARK },
108 { NULL, 0 }
109 };
110
111 static struct _s_x tablecmds[] = {
112 { "add", TOK_ADD },
113 { "delete", TOK_DEL },
114 { "create", TOK_CREATE },
115 { "destroy", TOK_DESTROY },
116 { "flush", TOK_FLUSH },
117 { "modify", TOK_MODIFY },
118 { "swap", TOK_SWAP },
119 { "info", TOK_INFO },
120 { "detail", TOK_DETAIL },
121 { "list", TOK_LIST },
122 { "lookup", TOK_LOOKUP },
123 { "atomic", TOK_ATOMIC },
124 { "lock", TOK_LOCK },
125 { "unlock", TOK_UNLOCK },
126 { NULL, 0 }
127 };
128
129 static int
lookup_host(char * host,struct in_addr * ipaddr)130 lookup_host (char *host, struct in_addr *ipaddr)
131 {
132 struct hostent *he;
133
134 if (!inet_aton(host, ipaddr)) {
135 if ((he = gethostbyname(host)) == NULL)
136 return(-1);
137 *ipaddr = *(struct in_addr *)he->h_addr_list[0];
138 }
139 return(0);
140 }
141
142 /*
143 * This one handles all table-related commands
144 * ipfw table NAME create ...
145 * ipfw table NAME modify ...
146 * ipfw table {NAME | all} destroy
147 * ipfw table NAME swap NAME
148 * ipfw table NAME lock
149 * ipfw table NAME unlock
150 * ipfw table NAME add addr[/masklen] [value]
151 * ipfw table NAME add [addr[/masklen] value] [addr[/masklen] value] ..
152 * ipfw table NAME delete addr[/masklen] [addr[/masklen]] ..
153 * ipfw table NAME lookup addr
154 * ipfw table {NAME | all} flush
155 * ipfw table {NAME | all} list
156 * ipfw table {NAME | all} info
157 * ipfw table {NAME | all} detail
158 */
159 void
ipfw_table_handler(int ac,char * av[])160 ipfw_table_handler(int ac, char *av[])
161 {
162 int do_add, is_all;
163 int atomic, error, tcmd;
164 ipfw_xtable_info i;
165 ipfw_obj_header oh;
166 char *tablename;
167 uint8_t set;
168 void *arg;
169
170 memset(&oh, 0, sizeof(oh));
171 is_all = 0;
172 if (g_co.use_set != 0)
173 set = g_co.use_set - 1;
174 else
175 set = 0;
176
177 ac--; av++;
178 NEED1("table needs name");
179 tablename = *av;
180
181 if (table_check_name(tablename) == 0) {
182 table_fill_ntlv(&oh.ntlv, *av, set, 1);
183 oh.idx = 1;
184 } else {
185 if (strcmp(tablename, "all") == 0)
186 is_all = 1;
187 else
188 errx(EX_USAGE, "table name %s is invalid", tablename);
189 }
190 ac--; av++;
191 NEED1("table needs command");
192
193 tcmd = get_token(tablecmds, *av, "table command");
194 /* Check if atomic operation was requested */
195 atomic = 0;
196 if (tcmd == TOK_ATOMIC) {
197 ac--; av++;
198 NEED1("atomic needs command");
199 tcmd = get_token(tablecmds, *av, "table command");
200 switch (tcmd) {
201 case TOK_ADD:
202 break;
203 default:
204 errx(EX_USAGE, "atomic is not compatible with %s", *av);
205 }
206 atomic = 1;
207 }
208
209 switch (tcmd) {
210 case TOK_LIST:
211 case TOK_INFO:
212 case TOK_DETAIL:
213 case TOK_FLUSH:
214 case TOK_DESTROY:
215 break;
216 default:
217 if (is_all != 0)
218 errx(EX_USAGE, "table name required");
219 }
220
221 switch (tcmd) {
222 case TOK_ADD:
223 case TOK_DEL:
224 do_add = **av == 'a';
225 ac--; av++;
226 table_modify_record(&oh, ac, av, do_add, g_co.do_quiet,
227 g_co.do_quiet, atomic);
228 break;
229 case TOK_CREATE:
230 ac--; av++;
231 table_create(&oh, ac, av);
232 break;
233 case TOK_MODIFY:
234 ac--; av++;
235 table_modify(&oh, ac, av);
236 break;
237 case TOK_DESTROY:
238 if (is_all == 0) {
239 if (table_destroy(&oh) == 0)
240 break;
241 if (errno != ESRCH)
242 err(EX_OSERR, "failed to destroy table %s",
243 tablename);
244 /* ESRCH isn't fatal, warn if not quiet mode */
245 if (g_co.do_quiet == 0)
246 warn("failed to destroy table %s", tablename);
247 } else {
248 error = tables_foreach(table_destroy_one, &oh, 1);
249 if (error != 0)
250 err(EX_OSERR,
251 "failed to destroy tables list");
252 }
253 break;
254 case TOK_FLUSH:
255 if (is_all == 0) {
256 if ((error = table_flush(&oh)) == 0)
257 break;
258 if (errno != ESRCH)
259 err(EX_OSERR, "failed to flush table %s info",
260 tablename);
261 /* ESRCH isn't fatal, warn if not quiet mode */
262 if (g_co.do_quiet == 0)
263 warn("failed to flush table %s info",
264 tablename);
265 } else {
266 error = tables_foreach(table_flush_one, &oh, 1);
267 if (error != 0)
268 err(EX_OSERR, "failed to flush tables list");
269 /* XXX: we ignore errors here */
270 }
271 break;
272 case TOK_SWAP:
273 ac--; av++;
274 NEED1("second table name required");
275 table_swap(&oh, *av);
276 break;
277 case TOK_LOCK:
278 case TOK_UNLOCK:
279 table_lock(&oh, (tcmd == TOK_LOCK));
280 break;
281 case TOK_DETAIL:
282 case TOK_INFO:
283 arg = (tcmd == TOK_DETAIL) ? (void *)1 : NULL;
284 if (is_all == 0) {
285 if ((error = table_get_info(&oh, &i)) != 0)
286 err(EX_OSERR, "failed to request table info");
287 table_show_info(&i, arg);
288 } else {
289 error = tables_foreach(table_show_info, arg, 1);
290 if (error != 0)
291 err(EX_OSERR, "failed to request tables list");
292 }
293 break;
294 case TOK_LIST:
295 arg = is_all ? (void*)1 : NULL;
296 if (is_all == 0) {
297 if ((error = table_get_info(&oh, &i)) != 0)
298 err(EX_OSERR, "failed to request table info");
299 table_show_one(&i, arg);
300 } else {
301 error = tables_foreach(table_show_one, arg, 1);
302 if (error != 0)
303 err(EX_OSERR, "failed to request tables list");
304 }
305 break;
306 case TOK_LOOKUP:
307 ac--; av++;
308 table_lookup(&oh, ac, av);
309 break;
310 }
311 }
312
313 void
table_fill_ntlv(ipfw_obj_ntlv * ntlv,const char * name,uint8_t set,uint16_t uidx)314 table_fill_ntlv(ipfw_obj_ntlv *ntlv, const char *name, uint8_t set,
315 uint16_t uidx)
316 {
317
318 ntlv->head.type = IPFW_TLV_TBL_NAME;
319 ntlv->head.length = sizeof(ipfw_obj_ntlv);
320 ntlv->idx = uidx;
321 ntlv->set = set;
322 strlcpy(ntlv->name, name, sizeof(ntlv->name));
323 }
324
325 static void
table_fill_objheader(ipfw_obj_header * oh,ipfw_xtable_info * i)326 table_fill_objheader(ipfw_obj_header *oh, ipfw_xtable_info *i)
327 {
328
329 oh->idx = 1;
330 table_fill_ntlv(&oh->ntlv, i->tablename, i->set, 1);
331 }
332
333 static struct _s_x tablenewcmds[] = {
334 { "type", TOK_TYPE },
335 { "valtype", TOK_VALTYPE },
336 { "algo", TOK_ALGO },
337 { "limit", TOK_LIMIT },
338 { "locked", TOK_LOCK },
339 { "missing", TOK_MISSING },
340 { "or-flush", TOK_ORFLUSH },
341 { NULL, 0 }
342 };
343
344 static struct _s_x flowtypecmds[] = {
345 { "src-ip", IPFW_TFFLAG_SRCIP },
346 { "proto", IPFW_TFFLAG_PROTO },
347 { "src-port", IPFW_TFFLAG_SRCPORT },
348 { "dst-ip", IPFW_TFFLAG_DSTIP },
349 { "dst-port", IPFW_TFFLAG_DSTPORT },
350 { NULL, 0 }
351 };
352
353 static int
table_parse_type(uint8_t ttype,char * p,uint8_t * tflags)354 table_parse_type(uint8_t ttype, char *p, uint8_t *tflags)
355 {
356 uint32_t fset, fclear;
357 char *e;
358
359 /* Parse type options */
360 switch(ttype) {
361 case IPFW_TABLE_FLOW:
362 fset = fclear = 0;
363 if (fill_flags(flowtypecmds, p, &e, &fset, &fclear) != 0)
364 errx(EX_USAGE,
365 "unable to parse flow option %s", e);
366 *tflags = fset;
367 break;
368 default:
369 return (EX_USAGE);
370 }
371
372 return (0);
373 }
374
375 static void
table_print_type(char * tbuf,size_t size,uint8_t type,uint8_t tflags)376 table_print_type(char *tbuf, size_t size, uint8_t type, uint8_t tflags)
377 {
378 const char *tname;
379 int l;
380
381 if ((tname = match_value(tabletypes, type)) == NULL)
382 tname = "unknown";
383
384 l = snprintf(tbuf, size, "%s", tname);
385 tbuf += l;
386 size -= l;
387
388 switch(type) {
389 case IPFW_TABLE_FLOW:
390 if (tflags != 0) {
391 *tbuf++ = ':';
392 l--;
393 print_flags_buffer(tbuf, size, flowtypecmds, tflags);
394 }
395 break;
396 }
397 }
398
399 /*
400 * Creates new table
401 *
402 * ipfw table NAME create [ type { addr | iface | number | flow } ]
403 * [ algo algoname ] [missing] [or-flush]
404 */
405 static void
table_create(ipfw_obj_header * oh,int ac,char * av[])406 table_create(ipfw_obj_header *oh, int ac, char *av[])
407 {
408 ipfw_xtable_info xi, xie;
409 int error, missing, orflush, tcmd, val;
410 uint32_t fset, fclear;
411 char *e, *p;
412 char tbuf[128];
413
414 missing = orflush = 0;
415 memset(&xi, 0, sizeof(xi));
416 while (ac > 0) {
417 tcmd = get_token(tablenewcmds, *av, "option");
418 ac--; av++;
419
420 switch (tcmd) {
421 case TOK_LIMIT:
422 NEED1("limit value required");
423 xi.limit = strtol(*av, NULL, 10);
424 ac--; av++;
425 break;
426 case TOK_TYPE:
427 NEED1("table type required");
428 /* Type may have suboptions after ':' */
429 if ((p = strchr(*av, ':')) != NULL)
430 *p++ = '\0';
431 val = match_token(tabletypes, *av);
432 if (val == -1) {
433 concat_tokens(tbuf, sizeof(tbuf), tabletypes,
434 ", ");
435 errx(EX_USAGE,
436 "Unknown tabletype: %s. Supported: %s",
437 *av, tbuf);
438 }
439 xi.type = val;
440 if (p != NULL) {
441 error = table_parse_type(val, p, &xi.tflags);
442 if (error != 0)
443 errx(EX_USAGE,
444 "Unsupported suboptions: %s", p);
445 }
446 ac--; av++;
447 break;
448 case TOK_VALTYPE:
449 NEED1("table value type required");
450 fset = fclear = 0;
451 val = fill_flags(tablevaltypes, *av, &e, &fset, &fclear);
452 if (val != -1) {
453 xi.vmask = fset;
454 ac--; av++;
455 break;
456 }
457 concat_tokens(tbuf, sizeof(tbuf), tablevaltypes, ", ");
458 errx(EX_USAGE, "Unknown value type: %s. Supported: %s",
459 e, tbuf);
460 break;
461 case TOK_ALGO:
462 NEED1("table algorithm name required");
463 if (strlen(*av) > sizeof(xi.algoname))
464 errx(EX_USAGE, "algorithm name too long");
465 strlcpy(xi.algoname, *av, sizeof(xi.algoname));
466 ac--; av++;
467 break;
468 case TOK_LOCK:
469 xi.flags |= IPFW_TGFLAGS_LOCKED;
470 break;
471 case TOK_ORFLUSH:
472 orflush = 1;
473 /* FALLTHROUGH */
474 case TOK_MISSING:
475 missing = 1;
476 break;
477 }
478 }
479
480 /* Set some defaults to preserve compatibility. */
481 if (xi.algoname[0] == '\0') {
482 const char *algo;
483
484 if (xi.type == 0)
485 xi.type = IPFW_TABLE_ADDR;
486 algo = match_value(tablealgos, xi.type);
487 if (algo != NULL)
488 strlcpy(xi.algoname, algo, sizeof(xi.algoname));
489 }
490 if (xi.vmask == 0)
491 xi.vmask = IPFW_VTYPE_LEGACY;
492
493 error = table_do_create(oh, &xi);
494
495 if (error == 0)
496 return;
497
498 if (errno != EEXIST || missing == 0)
499 err(EX_OSERR, "Table creation failed");
500
501 /* Check that existing table is the same we are trying to create */
502 if (table_get_info(oh, &xie) != 0)
503 err(EX_OSERR, "Existing table check failed");
504
505 if (xi.limit != xie.limit || xi.type != xie.type ||
506 xi.tflags != xie.tflags || xi.vmask != xie.vmask || (
507 xi.algoname[0] != '\0' && strcmp(xi.algoname,
508 xie.algoname) != 0) || xi.flags != xie.flags)
509 errx(EX_DATAERR, "The existing table is not compatible "
510 "with one you are creating.");
511
512 /* Flush existing table if instructed to do so */
513 if (orflush != 0 && table_flush(oh) != 0)
514 err(EX_OSERR, "Table flush on creation failed");
515 }
516
517 /*
518 * Creates new table
519 *
520 * Request: [ ipfw_obj_header ipfw_xtable_info ]
521 *
522 * Returns 0 on success.
523 */
524 static int
table_do_create(ipfw_obj_header * oh,ipfw_xtable_info * i)525 table_do_create(ipfw_obj_header *oh, ipfw_xtable_info *i)
526 {
527 char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)];
528 int error;
529
530 memcpy(tbuf, oh, sizeof(*oh));
531 memcpy(tbuf + sizeof(*oh), i, sizeof(*i));
532 oh = (ipfw_obj_header *)tbuf;
533
534 error = do_set3(IP_FW_TABLE_XCREATE, &oh->opheader, sizeof(tbuf));
535
536 return (error);
537 }
538
539 /*
540 * Modifies existing table
541 *
542 * ipfw table NAME modify [ limit number ]
543 */
544 static void
table_modify(ipfw_obj_header * oh,int ac,char * av[])545 table_modify(ipfw_obj_header *oh, int ac, char *av[])
546 {
547 ipfw_xtable_info xi;
548 int tcmd;
549
550 memset(&xi, 0, sizeof(xi));
551
552 while (ac > 0) {
553 tcmd = get_token(tablenewcmds, *av, "option");
554 ac--; av++;
555
556 switch (tcmd) {
557 case TOK_LIMIT:
558 NEED1("limit value required");
559 xi.limit = strtol(*av, NULL, 10);
560 xi.mflags |= IPFW_TMFLAGS_LIMIT;
561 ac--; av++;
562 break;
563 default:
564 errx(EX_USAGE, "cmd is not supported for modification");
565 }
566 }
567
568 if (table_do_modify(oh, &xi) != 0)
569 err(EX_OSERR, "Table modification failed");
570 }
571
572 /*
573 * Modifies existing table.
574 *
575 * Request: [ ipfw_obj_header ipfw_xtable_info ]
576 *
577 * Returns 0 on success.
578 */
579 static int
table_do_modify(ipfw_obj_header * oh,ipfw_xtable_info * i)580 table_do_modify(ipfw_obj_header *oh, ipfw_xtable_info *i)
581 {
582 char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)];
583 int error;
584
585 memcpy(tbuf, oh, sizeof(*oh));
586 memcpy(tbuf + sizeof(*oh), i, sizeof(*i));
587 oh = (ipfw_obj_header *)tbuf;
588
589 error = do_set3(IP_FW_TABLE_XMODIFY, &oh->opheader, sizeof(tbuf));
590
591 return (error);
592 }
593
594 /*
595 * Locks or unlocks given table
596 */
597 static void
table_lock(ipfw_obj_header * oh,int lock)598 table_lock(ipfw_obj_header *oh, int lock)
599 {
600 ipfw_xtable_info xi;
601
602 memset(&xi, 0, sizeof(xi));
603
604 xi.mflags |= IPFW_TMFLAGS_LOCK;
605 xi.flags |= (lock != 0) ? IPFW_TGFLAGS_LOCKED : 0;
606
607 if (table_do_modify(oh, &xi) != 0)
608 err(EX_OSERR, "Table %s failed", lock != 0 ? "lock" : "unlock");
609 }
610
611 /*
612 * Destroys given table specified by @oh->ntlv.
613 * Returns 0 on success.
614 */
615 static int
table_destroy(ipfw_obj_header * oh)616 table_destroy(ipfw_obj_header *oh)
617 {
618
619 if (do_set3(IP_FW_TABLE_XDESTROY, &oh->opheader, sizeof(*oh)) != 0)
620 return (-1);
621
622 return (0);
623 }
624
625 static int
table_destroy_one(ipfw_xtable_info * i,void * arg)626 table_destroy_one(ipfw_xtable_info *i, void *arg)
627 {
628 ipfw_obj_header *oh;
629
630 oh = (ipfw_obj_header *)arg;
631 table_fill_ntlv(&oh->ntlv, i->tablename, i->set, 1);
632 if (table_destroy(oh) != 0) {
633 if (g_co.do_quiet == 0)
634 warn("failed to destroy table(%s) in set %u",
635 i->tablename, i->set);
636 return (-1);
637 }
638 return (0);
639 }
640
641 /*
642 * Flushes given table specified by @oh->ntlv.
643 * Returns 0 on success.
644 */
645 static int
table_flush(ipfw_obj_header * oh)646 table_flush(ipfw_obj_header *oh)
647 {
648
649 if (do_set3(IP_FW_TABLE_XFLUSH, &oh->opheader, sizeof(*oh)) != 0)
650 return (-1);
651
652 return (0);
653 }
654
655 static int
table_do_swap(ipfw_obj_header * oh,char * second)656 table_do_swap(ipfw_obj_header *oh, char *second)
657 {
658 char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_obj_ntlv)];
659 int error;
660
661 memset(tbuf, 0, sizeof(tbuf));
662 memcpy(tbuf, oh, sizeof(*oh));
663 oh = (ipfw_obj_header *)tbuf;
664 table_fill_ntlv((ipfw_obj_ntlv *)(oh + 1), second, oh->ntlv.set, 1);
665
666 error = do_set3(IP_FW_TABLE_XSWAP, &oh->opheader, sizeof(tbuf));
667
668 return (error);
669 }
670
671 /*
672 * Swaps given table with @second one.
673 */
674 static int
table_swap(ipfw_obj_header * oh,char * second)675 table_swap(ipfw_obj_header *oh, char *second)
676 {
677
678 if (table_check_name(second) != 0)
679 errx(EX_USAGE, "table name %s is invalid", second);
680
681 if (table_do_swap(oh, second) == 0)
682 return (0);
683
684 switch (errno) {
685 case EINVAL:
686 errx(EX_USAGE, "Unable to swap table: check types");
687 case EFBIG:
688 errx(EX_USAGE, "Unable to swap table: check limits");
689 }
690
691 return (0);
692 }
693
694
695 /*
696 * Retrieves table in given table specified by @oh->ntlv.
697 * it inside @i.
698 * Returns 0 on success.
699 */
700 static int
table_get_info(ipfw_obj_header * oh,ipfw_xtable_info * i)701 table_get_info(ipfw_obj_header *oh, ipfw_xtable_info *i)
702 {
703 char tbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_xtable_info)];
704 size_t sz;
705
706 sz = sizeof(tbuf);
707 memset(tbuf, 0, sizeof(tbuf));
708 memcpy(tbuf, oh, sizeof(*oh));
709 oh = (ipfw_obj_header *)tbuf;
710
711 if (do_get3(IP_FW_TABLE_XINFO, &oh->opheader, &sz) != 0)
712 return (errno);
713
714 if (sz < sizeof(tbuf))
715 return (EINVAL);
716
717 *i = *(ipfw_xtable_info *)(oh + 1);
718
719 return (0);
720 }
721
722 static struct _s_x tablealgoclass[] = {
723 { "hash", IPFW_TACLASS_HASH },
724 { "array", IPFW_TACLASS_ARRAY },
725 { "radix", IPFW_TACLASS_RADIX },
726 { NULL, 0 }
727 };
728
729 struct ta_cldata {
730 uint8_t taclass;
731 uint8_t spare4;
732 uint16_t itemsize;
733 uint16_t itemsize6;
734 uint32_t size;
735 uint32_t count;
736 };
737
738 /*
739 * Print global/per-AF table @i algorithm info.
740 */
741 static void
table_show_tainfo(ipfw_xtable_info * i __unused,struct ta_cldata * d,const char * af,const char * taclass)742 table_show_tainfo(ipfw_xtable_info *i __unused, struct ta_cldata *d,
743 const char *af, const char *taclass)
744 {
745
746 switch (d->taclass) {
747 case IPFW_TACLASS_HASH:
748 case IPFW_TACLASS_ARRAY:
749 printf(" %salgorithm %s info\n", af, taclass);
750 if (d->itemsize == d->itemsize6)
751 printf(" size: %u items: %u itemsize: %u\n",
752 d->size, d->count, d->itemsize);
753 else
754 printf(" size: %u items: %u "
755 "itemsize4: %u itemsize6: %u\n",
756 d->size, d->count,
757 d->itemsize, d->itemsize6);
758 break;
759 case IPFW_TACLASS_RADIX:
760 printf(" %salgorithm %s info\n", af, taclass);
761 if (d->itemsize == d->itemsize6)
762 printf(" items: %u itemsize: %u\n",
763 d->count, d->itemsize);
764 else
765 printf(" items: %u "
766 "itemsize4: %u itemsize6: %u\n",
767 d->count, d->itemsize, d->itemsize6);
768 break;
769 default:
770 printf(" algo class: %s\n", taclass);
771 }
772 }
773
774 static void
table_print_valheader(char * buf,size_t bufsize,uint32_t vmask)775 table_print_valheader(char *buf, size_t bufsize, uint32_t vmask)
776 {
777
778 if (vmask == IPFW_VTYPE_LEGACY) {
779 snprintf(buf, bufsize, "legacy");
780 return;
781 }
782
783 memset(buf, 0, bufsize);
784 print_flags_buffer(buf, bufsize, tablevaltypes, vmask);
785 }
786
787 /*
788 * Prints table info struct @i in human-readable form.
789 */
790 static int
table_show_info(ipfw_xtable_info * i,void * arg)791 table_show_info(ipfw_xtable_info *i, void *arg)
792 {
793 const char *vtype;
794 ipfw_ta_tinfo *tainfo;
795 int afdata, afitem;
796 struct ta_cldata d;
797 char ttype[64], tvtype[64];
798
799 table_print_type(ttype, sizeof(ttype), i->type, i->tflags);
800 table_print_valheader(tvtype, sizeof(tvtype), i->vmask);
801
802 printf("--- table(%s), set(%u) ---\n", i->tablename, i->set);
803 if ((i->flags & IPFW_TGFLAGS_LOCKED) != 0)
804 printf(" kindex: %d, type: %s, locked\n", i->kidx, ttype);
805 else
806 printf(" kindex: %d, type: %s\n", i->kidx, ttype);
807 printf(" references: %u, valtype: %s\n", i->refcnt, tvtype);
808 printf(" algorithm: %s\n", i->algoname);
809 printf(" items: %u, size: %u\n", i->count, i->size);
810 if (i->limit > 0)
811 printf(" limit: %u\n", i->limit);
812
813 /* Print algo-specific info if requested & set */
814 if (arg == NULL)
815 return (0);
816
817 if ((i->ta_info.flags & IPFW_TATFLAGS_DATA) == 0)
818 return (0);
819 tainfo = &i->ta_info;
820
821 afdata = 0;
822 afitem = 0;
823 if (tainfo->flags & IPFW_TATFLAGS_AFDATA)
824 afdata = 1;
825 if (tainfo->flags & IPFW_TATFLAGS_AFITEM)
826 afitem = 1;
827
828 memset(&d, 0, sizeof(d));
829 d.taclass = tainfo->taclass4;
830 d.size = tainfo->size4;
831 d.count = tainfo->count4;
832 d.itemsize = tainfo->itemsize4;
833 if (afdata == 0 && afitem != 0)
834 d.itemsize6 = tainfo->itemsize6;
835 else
836 d.itemsize6 = d.itemsize;
837 if ((vtype = match_value(tablealgoclass, d.taclass)) == NULL)
838 vtype = "unknown";
839
840 if (afdata == 0) {
841 table_show_tainfo(i, &d, "", vtype);
842 } else {
843 table_show_tainfo(i, &d, "IPv4 ", vtype);
844 memset(&d, 0, sizeof(d));
845 d.taclass = tainfo->taclass6;
846 if ((vtype = match_value(tablealgoclass, d.taclass)) == NULL)
847 vtype = "unknown";
848 d.size = tainfo->size6;
849 d.count = tainfo->count6;
850 d.itemsize = tainfo->itemsize6;
851 d.itemsize6 = d.itemsize;
852 table_show_tainfo(i, &d, "IPv6 ", vtype);
853 }
854
855 return (0);
856 }
857
858
859 /*
860 * Function wrappers which can be used either
861 * as is or as foreach function parameter.
862 */
863
864 static int
table_show_one(ipfw_xtable_info * i,void * arg)865 table_show_one(ipfw_xtable_info *i, void *arg)
866 {
867 ipfw_obj_header *oh = NULL;
868 int error;
869 int is_all;
870
871 is_all = arg == NULL ? 0 : 1;
872
873 if ((error = table_do_get_list(i, &oh)) != 0) {
874 err(EX_OSERR, "Error requesting table %s list", i->tablename);
875 return (error);
876 }
877
878 table_show_list(oh, is_all);
879
880 free(oh);
881 return (0);
882 }
883
884 static int
table_flush_one(ipfw_xtable_info * i,void * arg)885 table_flush_one(ipfw_xtable_info *i, void *arg)
886 {
887 ipfw_obj_header *oh;
888
889 oh = (ipfw_obj_header *)arg;
890
891 table_fill_ntlv(&oh->ntlv, i->tablename, i->set, 1);
892
893 return (table_flush(oh));
894 }
895
896 static int
table_do_modify_record(int cmd,ipfw_obj_header * oh,ipfw_obj_tentry * tent,int count,int atomic)897 table_do_modify_record(int cmd, ipfw_obj_header *oh,
898 ipfw_obj_tentry *tent, int count, int atomic)
899 {
900 ipfw_obj_ctlv *ctlv;
901 ipfw_obj_tentry *tent_base;
902 caddr_t pbuf;
903 char xbuf[sizeof(*oh) + sizeof(ipfw_obj_ctlv) + sizeof(*tent)];
904 int error, i;
905 size_t sz;
906
907 sz = sizeof(*ctlv) + sizeof(*tent) * count;
908 if (count == 1) {
909 memset(xbuf, 0, sizeof(xbuf));
910 pbuf = xbuf;
911 } else {
912 if ((pbuf = calloc(1, sizeof(*oh) + sz)) == NULL)
913 return (ENOMEM);
914 }
915
916 memcpy(pbuf, oh, sizeof(*oh));
917 oh = (ipfw_obj_header *)pbuf;
918 oh->opheader.version = 1; /* Current version */
919
920 ctlv = (ipfw_obj_ctlv *)(oh + 1);
921 ctlv->count = count;
922 ctlv->head.length = sz;
923 if (atomic != 0)
924 ctlv->flags |= IPFW_CTF_ATOMIC;
925
926 tent_base = tent;
927 memcpy(ctlv + 1, tent, sizeof(*tent) * count);
928 tent = (ipfw_obj_tentry *)(ctlv + 1);
929 for (i = 0; i < count; i++, tent++) {
930 tent->head.length = sizeof(ipfw_obj_tentry);
931 tent->idx = oh->idx;
932 }
933
934 sz += sizeof(*oh);
935 error = do_get3(cmd, &oh->opheader, &sz);
936 if (error != 0)
937 error = errno;
938 tent = (ipfw_obj_tentry *)(ctlv + 1);
939 /* Copy result back to provided buffer */
940 memcpy(tent_base, ctlv + 1, sizeof(*tent) * count);
941
942 if (pbuf != xbuf)
943 free(pbuf);
944
945 return (error);
946 }
947
948 static void
table_modify_record(ipfw_obj_header * oh,int ac,char * av[],int add,int quiet,int update,int atomic)949 table_modify_record(ipfw_obj_header *oh, int ac, char *av[], int add,
950 int quiet, int update, int atomic)
951 {
952 ipfw_obj_tentry *ptent, tent, *tent_buf;
953 ipfw_xtable_info xi;
954 const char *etxt, *px, *texterr;
955 uint8_t type;
956 uint32_t vmask;
957 int cmd, count, error, i, ignored;
958
959 if (ac == 0)
960 errx(EX_USAGE, "address required");
961
962 if (add != 0) {
963 cmd = IP_FW_TABLE_XADD;
964 texterr = "Adding record failed";
965 } else {
966 cmd = IP_FW_TABLE_XDEL;
967 texterr = "Deleting record failed";
968 }
969
970 /*
971 * Calculate number of entries:
972 * Assume [key val] x N for add
973 * and
974 * key x N for delete
975 */
976 count = (add != 0) ? ac / 2 + 1 : ac;
977
978 if (count <= 1) {
979 /* Adding single entry with/without value */
980 memset(&tent, 0, sizeof(tent));
981 tent_buf = &tent;
982 } else {
983
984 if ((tent_buf = calloc(count, sizeof(tent))) == NULL)
985 errx(EX_OSERR,
986 "Unable to allocate memory for all entries");
987 }
988 ptent = tent_buf;
989
990 memset(&xi, 0, sizeof(xi));
991 count = 0;
992 while (ac > 0) {
993 tentry_fill_key(oh, ptent, *av, add, &type, &vmask, &xi);
994
995 /*
996 * Compatibility layer: auto-create table if not exists.
997 */
998 if (xi.tablename[0] == '\0') {
999 xi.type = type;
1000 xi.vmask = vmask;
1001 strlcpy(xi.tablename, oh->ntlv.name,
1002 sizeof(xi.tablename));
1003 if (quiet == 0)
1004 warnx("DEPRECATED: inserting data into "
1005 "non-existent table %s. (auto-created)",
1006 xi.tablename);
1007 table_do_create(oh, &xi);
1008 }
1009
1010 oh->ntlv.type = type;
1011 ac--; av++;
1012
1013 if (add != 0 && ac > 0) {
1014 tentry_fill_value(oh, ptent, *av, type, vmask);
1015 ac--; av++;
1016 }
1017
1018 if (update != 0)
1019 ptent->head.flags |= IPFW_TF_UPDATE;
1020
1021 count++;
1022 ptent++;
1023 }
1024
1025 error = table_do_modify_record(cmd, oh, tent_buf, count, atomic);
1026
1027 /*
1028 * Compatibility stuff: do not yell on duplicate keys or
1029 * failed deletions.
1030 */
1031 if (error == 0 || (error == EEXIST && add != 0) ||
1032 (error == ENOENT && add == 0)) {
1033 if (quiet != 0) {
1034 if (tent_buf != &tent)
1035 free(tent_buf);
1036 return;
1037 }
1038 }
1039
1040 /* Report results back */
1041 ptent = tent_buf;
1042 for (i = 0; i < count; ptent++, i++) {
1043 ignored = 0;
1044 switch (ptent->result) {
1045 case IPFW_TR_ADDED:
1046 px = "added";
1047 break;
1048 case IPFW_TR_DELETED:
1049 px = "deleted";
1050 break;
1051 case IPFW_TR_UPDATED:
1052 px = "updated";
1053 break;
1054 case IPFW_TR_LIMIT:
1055 px = "limit";
1056 ignored = 1;
1057 break;
1058 case IPFW_TR_ERROR:
1059 px = "error";
1060 ignored = 1;
1061 break;
1062 case IPFW_TR_NOTFOUND:
1063 px = "notfound";
1064 ignored = 1;
1065 break;
1066 case IPFW_TR_EXISTS:
1067 px = "exists";
1068 ignored = 1;
1069 break;
1070 case IPFW_TR_IGNORED:
1071 px = "ignored";
1072 ignored = 1;
1073 break;
1074 default:
1075 px = "unknown";
1076 ignored = 1;
1077 }
1078
1079 if (error != 0 && atomic != 0 && ignored == 0)
1080 printf("%s(reverted): ", px);
1081 else
1082 printf("%s: ", px);
1083
1084 table_show_entry(&xi, ptent);
1085 }
1086
1087 if (tent_buf != &tent)
1088 free(tent_buf);
1089
1090 if (error == 0)
1091 return;
1092 /* Get real OS error */
1093 error = errno;
1094
1095 /* Try to provide more human-readable error */
1096 switch (error) {
1097 case EEXIST:
1098 etxt = "record already exists";
1099 break;
1100 case EFBIG:
1101 etxt = "limit hit";
1102 break;
1103 case ESRCH:
1104 etxt = "table not found";
1105 break;
1106 case ENOENT:
1107 etxt = "record not found";
1108 break;
1109 case EACCES:
1110 etxt = "table is locked";
1111 break;
1112 default:
1113 etxt = strerror(error);
1114 }
1115
1116 errx(EX_OSERR, "%s: %s", texterr, etxt);
1117 }
1118
1119 static int
table_do_lookup(ipfw_obj_header * oh,char * key,ipfw_xtable_info * xi,ipfw_obj_tentry * xtent)1120 table_do_lookup(ipfw_obj_header *oh, char *key, ipfw_xtable_info *xi,
1121 ipfw_obj_tentry *xtent)
1122 {
1123 char xbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_obj_tentry)];
1124 ipfw_obj_tentry *tent;
1125 uint8_t type;
1126 uint32_t vmask;
1127 size_t sz;
1128
1129 memcpy(xbuf, oh, sizeof(*oh));
1130 oh = (ipfw_obj_header *)xbuf;
1131 tent = (ipfw_obj_tentry *)(oh + 1);
1132
1133 memset(tent, 0, sizeof(*tent));
1134 tent->head.length = sizeof(*tent);
1135 tent->idx = 1;
1136
1137 tentry_fill_key(oh, tent, key, 0, &type, &vmask, xi);
1138 oh->ntlv.type = type;
1139
1140 sz = sizeof(xbuf);
1141 if (do_get3(IP_FW_TABLE_XFIND, &oh->opheader, &sz) != 0)
1142 return (errno);
1143
1144 if (sz < sizeof(xbuf))
1145 return (EINVAL);
1146
1147 *xtent = *tent;
1148
1149 return (0);
1150 }
1151
1152 static void
table_lookup(ipfw_obj_header * oh,int ac,char * av[])1153 table_lookup(ipfw_obj_header *oh, int ac, char *av[])
1154 {
1155 ipfw_obj_tentry xtent;
1156 ipfw_xtable_info xi;
1157 char key[64];
1158 int error;
1159
1160 if (ac == 0)
1161 errx(EX_USAGE, "address required");
1162
1163 strlcpy(key, *av, sizeof(key));
1164
1165 memset(&xi, 0, sizeof(xi));
1166 error = table_do_lookup(oh, key, &xi, &xtent);
1167
1168 switch (error) {
1169 case 0:
1170 break;
1171 case ESRCH:
1172 errx(EX_UNAVAILABLE, "Table %s not found", oh->ntlv.name);
1173 case ENOENT:
1174 errx(EX_UNAVAILABLE, "Entry %s not found", *av);
1175 case ENOTSUP:
1176 errx(EX_UNAVAILABLE, "Table %s algo does not support "
1177 "\"lookup\" method", oh->ntlv.name);
1178 default:
1179 err(EX_OSERR, "getsockopt(IP_FW_TABLE_XFIND)");
1180 }
1181
1182 table_show_entry(&xi, &xtent);
1183 }
1184
1185 static void
tentry_fill_key_type(char * arg,ipfw_obj_tentry * tentry,uint8_t type,uint8_t tflags)1186 tentry_fill_key_type(char *arg, ipfw_obj_tentry *tentry, uint8_t type,
1187 uint8_t tflags)
1188 {
1189 char *p, *pp;
1190 int mask, af;
1191 struct in6_addr *paddr, tmp;
1192 struct ether_addr *mac;
1193 struct tflow_entry *tfe;
1194 uint32_t key, *pkey;
1195 uint16_t port;
1196 struct protoent *pent;
1197 struct servent *sent;
1198 int masklen;
1199
1200 mask = masklen = 0;
1201 af = 0;
1202 paddr = (struct in6_addr *)&tentry->k;
1203
1204 switch (type) {
1205 case IPFW_TABLE_ADDR:
1206 /* Remove / if exists */
1207 if ((p = strchr(arg, '/')) != NULL) {
1208 *p = '\0';
1209 mask = atoi(p + 1);
1210 }
1211
1212 if (inet_pton(AF_INET, arg, paddr) == 1) {
1213 if (p != NULL && mask > 32)
1214 errx(EX_DATAERR, "bad IPv4 mask width: %s",
1215 p + 1);
1216
1217 masklen = p ? mask : 32;
1218 af = AF_INET;
1219 } else if (inet_pton(AF_INET6, arg, paddr) == 1) {
1220 if (IN6_IS_ADDR_V4COMPAT(paddr))
1221 errx(EX_DATAERR,
1222 "Use IPv4 instead of v4-compatible");
1223 if (p != NULL && mask > 128)
1224 errx(EX_DATAERR, "bad IPv6 mask width: %s",
1225 p + 1);
1226
1227 masklen = p ? mask : 128;
1228 af = AF_INET6;
1229 } else {
1230 /* Assume FQDN */
1231 if (lookup_host(arg, (struct in_addr *)paddr) != 0)
1232 errx(EX_NOHOST, "hostname ``%s'' unknown", arg);
1233
1234 masklen = 32;
1235 type = IPFW_TABLE_ADDR;
1236 af = AF_INET;
1237 }
1238 break;
1239 case IPFW_TABLE_MAC:
1240 /* Remove / if exists */
1241 if ((p = strchr(arg, '/')) != NULL) {
1242 *p = '\0';
1243 mask = atoi(p + 1);
1244 }
1245
1246 if (p != NULL && mask > 8 * ETHER_ADDR_LEN)
1247 errx(EX_DATAERR, "bad MAC mask width: %s",
1248 p + 1);
1249
1250 if ((mac = ether_aton(arg)) == NULL)
1251 errx(EX_DATAERR, "Incorrect MAC address");
1252
1253 memcpy(tentry->k.mac, mac->octet, ETHER_ADDR_LEN);
1254 masklen = p ? mask : 8 * ETHER_ADDR_LEN;
1255 af = AF_LINK;
1256 break;
1257 case IPFW_TABLE_INTERFACE:
1258 /* Assume interface name. Copy significant data only */
1259 mask = MIN(strlen(arg), IF_NAMESIZE - 1);
1260 memcpy(paddr, arg, mask);
1261 /* Set mask to exact match */
1262 masklen = 8 * IF_NAMESIZE;
1263 break;
1264 case IPFW_TABLE_NUMBER:
1265 /* Port or any other key */
1266 key = strtol(arg, &p, 10);
1267 if (*p != '\0')
1268 errx(EX_DATAERR, "Invalid number: %s", arg);
1269
1270 pkey = (uint32_t *)paddr;
1271 *pkey = key;
1272 masklen = 32;
1273 break;
1274 case IPFW_TABLE_FLOW:
1275 /* Assume [src-ip][,proto][,src-port][,dst-ip][,dst-port] */
1276 tfe = &tentry->k.flow;
1277 af = 0;
1278
1279 /* Handle <ipv4|ipv6> */
1280 if ((tflags & IPFW_TFFLAG_SRCIP) != 0) {
1281 if ((p = strchr(arg, ',')) != NULL)
1282 *p++ = '\0';
1283 /* Determine family using temporary storage */
1284 if (inet_pton(AF_INET, arg, &tmp) == 1) {
1285 if (af != 0 && af != AF_INET)
1286 errx(EX_DATAERR,
1287 "Inconsistent address family\n");
1288 af = AF_INET;
1289 memcpy(&tfe->a.a4.sip, &tmp, 4);
1290 } else if (inet_pton(AF_INET6, arg, &tmp) == 1) {
1291 if (af != 0 && af != AF_INET6)
1292 errx(EX_DATAERR,
1293 "Inconsistent address family\n");
1294 af = AF_INET6;
1295 memcpy(&tfe->a.a6.sip6, &tmp, 16);
1296 }
1297
1298 arg = p;
1299 }
1300
1301 /* Handle <proto-num|proto-name> */
1302 if ((tflags & IPFW_TFFLAG_PROTO) != 0) {
1303 if (arg == NULL)
1304 errx(EX_DATAERR, "invalid key: proto missing");
1305 if ((p = strchr(arg, ',')) != NULL)
1306 *p++ = '\0';
1307
1308 key = strtol(arg, &pp, 10);
1309 if (*pp != '\0') {
1310 if ((pent = getprotobyname(arg)) == NULL)
1311 errx(EX_DATAERR, "Unknown proto: %s",
1312 arg);
1313 else
1314 key = pent->p_proto;
1315 }
1316
1317 if (key > 255)
1318 errx(EX_DATAERR, "Bad protocol number: %u",key);
1319
1320 tfe->proto = key;
1321
1322 arg = p;
1323 }
1324
1325 /* Handle <port-num|service-name> */
1326 if ((tflags & IPFW_TFFLAG_SRCPORT) != 0) {
1327 if (arg == NULL)
1328 errx(EX_DATAERR, "invalid key: src port missing");
1329 if ((p = strchr(arg, ',')) != NULL)
1330 *p++ = '\0';
1331
1332 port = htons(strtol(arg, &pp, 10));
1333 if (*pp != '\0') {
1334 if ((sent = getservbyname(arg, NULL)) == NULL)
1335 errx(EX_DATAERR, "Unknown service: %s",
1336 arg);
1337 port = sent->s_port;
1338 }
1339 tfe->sport = port;
1340 arg = p;
1341 }
1342
1343 /* Handle <ipv4|ipv6>*/
1344 if ((tflags & IPFW_TFFLAG_DSTIP) != 0) {
1345 if (arg == NULL)
1346 errx(EX_DATAERR, "invalid key: dst ip missing");
1347 if ((p = strchr(arg, ',')) != NULL)
1348 *p++ = '\0';
1349 /* Determine family using temporary storage */
1350 if (inet_pton(AF_INET, arg, &tmp) == 1) {
1351 if (af != 0 && af != AF_INET)
1352 errx(EX_DATAERR,
1353 "Inconsistent address family");
1354 af = AF_INET;
1355 memcpy(&tfe->a.a4.dip, &tmp, 4);
1356 } else if (inet_pton(AF_INET6, arg, &tmp) == 1) {
1357 if (af != 0 && af != AF_INET6)
1358 errx(EX_DATAERR,
1359 "Inconsistent address family");
1360 af = AF_INET6;
1361 memcpy(&tfe->a.a6.dip6, &tmp, 16);
1362 }
1363
1364 arg = p;
1365 }
1366
1367 /* Handle <port-num|service-name> */
1368 if ((tflags & IPFW_TFFLAG_DSTPORT) != 0) {
1369 if (arg == NULL)
1370 errx(EX_DATAERR, "invalid key: dst port missing");
1371 if ((p = strchr(arg, ',')) != NULL)
1372 *p++ = '\0';
1373
1374 port = htons(strtol(arg, &pp, 10));
1375 if (*pp != '\0') {
1376 if ((sent = getservbyname(arg, NULL)) == NULL)
1377 errx(EX_DATAERR, "Unknown service: %s",
1378 arg);
1379 port = sent->s_port;
1380 }
1381 tfe->dport = port;
1382 arg = p;
1383 }
1384
1385 tfe->af = af;
1386
1387 break;
1388
1389 default:
1390 errx(EX_DATAERR, "Unsupported table type: %d", type);
1391 }
1392
1393 tentry->subtype = af;
1394 tentry->masklen = masklen;
1395 }
1396
1397 /*
1398 * Tries to guess table key type.
1399 * This procedure is used in legacy table auto-create
1400 * code AND in `ipfw -n` ruleset checking.
1401 *
1402 * Imported from old table_fill_xentry() parse code.
1403 */
1404 static int
guess_key_type(char * key,uint8_t * ptype)1405 guess_key_type(char *key, uint8_t *ptype)
1406 {
1407 char *p;
1408 struct in6_addr addr;
1409
1410 if (ishexnumber(*key) != 0 || *key == ':') {
1411 /* Remove / if exists */
1412 if ((p = strchr(key, '/')) != NULL)
1413 *p = '\0';
1414
1415 if ((inet_pton(AF_INET, key, &addr) == 1) ||
1416 (inet_pton(AF_INET6, key, &addr) == 1)) {
1417 *ptype = IPFW_TABLE_CIDR;
1418 if (p != NULL)
1419 *p = '/';
1420 return (0);
1421 } else {
1422 /* Port or any other key */
1423 /* Skip non-base 10 entries like 'fa1' */
1424 (void)strtol(key, &p, 10);
1425 if (*p == '\0') {
1426 *ptype = IPFW_TABLE_NUMBER;
1427 return (0);
1428 } else if ((p != key) && (*p == '.')) {
1429 /*
1430 * Warn on IPv4 address strings
1431 * which are "valid" for inet_aton() but not
1432 * in inet_pton().
1433 *
1434 * Typical examples: '10.5' or '10.0.0.05'
1435 */
1436 return (1);
1437 }
1438 }
1439 }
1440
1441 if (strchr(key, '.') == NULL) {
1442 *ptype = IPFW_TABLE_INTERFACE;
1443 return (0);
1444 }
1445
1446 if (lookup_host(key, (struct in_addr *)&addr) != 0)
1447 return (1);
1448
1449 *ptype = IPFW_TABLE_CIDR;
1450 return (0);
1451 }
1452
1453 static void
tentry_fill_key(ipfw_obj_header * oh,ipfw_obj_tentry * tent,char * key,int add,uint8_t * ptype,uint32_t * pvmask,ipfw_xtable_info * xi)1454 tentry_fill_key(ipfw_obj_header *oh, ipfw_obj_tentry *tent, char *key,
1455 int add, uint8_t *ptype, uint32_t *pvmask, ipfw_xtable_info *xi)
1456 {
1457 uint8_t type, tflags;
1458 uint32_t vmask;
1459 int error;
1460
1461 type = 0;
1462 tflags = 0;
1463 vmask = 0;
1464
1465 if (xi->tablename[0] == '\0')
1466 error = table_get_info(oh, xi);
1467 else
1468 error = 0;
1469
1470 if (error == 0) {
1471 if (g_co.test_only == 0) {
1472 /* Table found */
1473 type = xi->type;
1474 tflags = xi->tflags;
1475 vmask = xi->vmask;
1476 } else {
1477 /*
1478 * We're running `ipfw -n`
1479 * Compatibility layer: try to guess key type
1480 * before failing.
1481 */
1482 if (guess_key_type(key, &type) != 0) {
1483 /* Inknown key */
1484 errx(EX_USAGE, "Cannot guess "
1485 "key '%s' type", key);
1486 }
1487 vmask = IPFW_VTYPE_LEGACY;
1488 }
1489 } else {
1490 if (error != ESRCH)
1491 errx(EX_OSERR, "Error requesting table %s info",
1492 oh->ntlv.name);
1493 if (add == 0)
1494 errx(EX_DATAERR, "Table %s does not exist",
1495 oh->ntlv.name);
1496 /*
1497 * Table does not exist
1498 * Compatibility layer: try to guess key type before failing.
1499 */
1500 if (guess_key_type(key, &type) != 0) {
1501 /* Inknown key */
1502 errx(EX_USAGE, "Table %s does not exist, cannot guess "
1503 "key '%s' type", oh->ntlv.name, key);
1504 }
1505
1506 vmask = IPFW_VTYPE_LEGACY;
1507 }
1508
1509 tentry_fill_key_type(key, tent, type, tflags);
1510
1511 *ptype = type;
1512 *pvmask = vmask;
1513 }
1514
1515 static void
set_legacy_value(uint32_t val,ipfw_table_value * v)1516 set_legacy_value(uint32_t val, ipfw_table_value *v)
1517 {
1518 v->tag = val;
1519 v->pipe = val;
1520 v->divert = val;
1521 v->skipto = val;
1522 v->netgraph = val;
1523 v->fib = val;
1524 v->nat = val;
1525 v->nh4 = val;
1526 v->dscp = (uint8_t)val;
1527 v->limit = val;
1528 }
1529
1530 static void
tentry_fill_value(ipfw_obj_header * oh __unused,ipfw_obj_tentry * tent,char * arg,uint8_t type __unused,uint32_t vmask)1531 tentry_fill_value(ipfw_obj_header *oh __unused, ipfw_obj_tentry *tent,
1532 char *arg, uint8_t type __unused, uint32_t vmask)
1533 {
1534 struct addrinfo hints, *res;
1535 struct in_addr ipaddr;
1536 const char *etype;
1537 char *comma, *e, *n, *p;
1538 uint32_t a4, flag, val;
1539 ipfw_table_value *v;
1540 uint32_t i;
1541 int dval;
1542
1543 v = &tent->v.value;
1544
1545 /* Compat layer: keep old behavior for legacy value types */
1546 if (vmask == IPFW_VTYPE_LEGACY) {
1547 /* Try to interpret as number first */
1548 val = strtoul(arg, &p, 0);
1549 if (*p == '\0') {
1550 set_legacy_value(val, v);
1551 return;
1552 }
1553 if (inet_pton(AF_INET, arg, &val) == 1) {
1554 set_legacy_value(ntohl(val), v);
1555 return;
1556 }
1557 /* Try hostname */
1558 if (lookup_host(arg, &ipaddr) == 0) {
1559 set_legacy_value(ntohl(ipaddr.s_addr), v);
1560 return;
1561 }
1562 errx(EX_OSERR, "Unable to parse value %s", arg);
1563 }
1564
1565 /*
1566 * Shorthands: handle single value if vmask consists
1567 * of numbers only. e.g.:
1568 * vmask = "fib,skipto" -> treat input "1" as "1,1"
1569 */
1570
1571 n = arg;
1572 etype = NULL;
1573 for (i = 1; i < (1u << 31); i *= 2) {
1574 if ((flag = (vmask & i)) == 0)
1575 continue;
1576 vmask &= ~flag;
1577
1578 if ((comma = strchr(n, ',')) != NULL)
1579 *comma = '\0';
1580
1581 switch (flag) {
1582 case IPFW_VTYPE_TAG:
1583 v->tag = strtol(n, &e, 10);
1584 if (*e != '\0')
1585 etype = "tag";
1586 break;
1587 case IPFW_VTYPE_PIPE:
1588 v->pipe = strtol(n, &e, 10);
1589 if (*e != '\0')
1590 etype = "pipe";
1591 break;
1592 case IPFW_VTYPE_DIVERT:
1593 v->divert = strtol(n, &e, 10);
1594 if (*e != '\0')
1595 etype = "divert";
1596 break;
1597 case IPFW_VTYPE_SKIPTO:
1598 v->skipto = strtol(n, &e, 10);
1599 if (*e != '\0')
1600 etype = "skipto";
1601 break;
1602 case IPFW_VTYPE_NETGRAPH:
1603 v->netgraph = strtol(n, &e, 10);
1604 if (*e != '\0')
1605 etype = "netgraph";
1606 break;
1607 case IPFW_VTYPE_FIB:
1608 v->fib = strtol(n, &e, 10);
1609 if (*e != '\0')
1610 etype = "fib";
1611 break;
1612 case IPFW_VTYPE_NAT:
1613 v->nat = strtol(n, &e, 10);
1614 if (*e != '\0')
1615 etype = "nat";
1616 break;
1617 case IPFW_VTYPE_LIMIT:
1618 v->limit = strtol(n, &e, 10);
1619 if (*e != '\0')
1620 etype = "limit";
1621 break;
1622 case IPFW_VTYPE_NH4:
1623 if (strchr(n, '.') != NULL &&
1624 inet_pton(AF_INET, n, &a4) == 1) {
1625 v->nh4 = ntohl(a4);
1626 break;
1627 }
1628 if (lookup_host(n, &ipaddr) == 0) {
1629 v->nh4 = ntohl(ipaddr.s_addr);
1630 break;
1631 }
1632 etype = "ipv4";
1633 break;
1634 case IPFW_VTYPE_DSCP:
1635 if (isalpha(*n)) {
1636 if ((dval = match_token(f_ipdscp, n)) != -1) {
1637 v->dscp = dval;
1638 break;
1639 } else
1640 etype = "DSCP code";
1641 } else {
1642 v->dscp = strtol(n, &e, 10);
1643 if (v->dscp > 63 || *e != '\0')
1644 etype = "DSCP value";
1645 }
1646 break;
1647 case IPFW_VTYPE_NH6:
1648 if (strchr(n, ':') != NULL) {
1649 memset(&hints, 0, sizeof(hints));
1650 hints.ai_family = AF_INET6;
1651 hints.ai_flags = AI_NUMERICHOST;
1652 if (getaddrinfo(n, NULL, &hints, &res) == 0) {
1653 v->nh6 = ((struct sockaddr_in6 *)
1654 res->ai_addr)->sin6_addr;
1655 v->zoneid = ((struct sockaddr_in6 *)
1656 res->ai_addr)->sin6_scope_id;
1657 freeaddrinfo(res);
1658 break;
1659 }
1660 }
1661 etype = "ipv6";
1662 break;
1663 case IPFW_VTYPE_MARK:
1664 v->mark = strtol(n, &e, 16);
1665 if (*e != '\0')
1666 etype = "mark";
1667 break;
1668 }
1669
1670 if (etype != NULL)
1671 errx(EX_USAGE, "Unable to parse %s as %s", n, etype);
1672
1673 if (comma != NULL)
1674 *comma++ = ',';
1675
1676 if ((n = comma) != NULL)
1677 continue;
1678
1679 /* End of input. */
1680 if (vmask != 0)
1681 errx(EX_USAGE, "Not enough fields inside value");
1682 }
1683 }
1684
1685 /*
1686 * Compare table names.
1687 * Honor number comparison.
1688 */
1689 static int
tablename_cmp(const void * a,const void * b)1690 tablename_cmp(const void *a, const void *b)
1691 {
1692 const ipfw_xtable_info *ia, *ib;
1693
1694 ia = (const ipfw_xtable_info *)a;
1695 ib = (const ipfw_xtable_info *)b;
1696
1697 return (stringnum_cmp(ia->tablename, ib->tablename));
1698 }
1699
1700 /*
1701 * Retrieves table list from kernel,
1702 * optionally sorts it and calls requested function for each table.
1703 * Returns 0 on success.
1704 */
1705 static int
tables_foreach(table_cb_t * f,void * arg,int sort)1706 tables_foreach(table_cb_t *f, void *arg, int sort)
1707 {
1708 ipfw_obj_lheader *olh;
1709 ipfw_xtable_info *info;
1710 size_t sz;
1711 uint32_t i;
1712
1713 /* Start with reasonable default */
1714 sz = sizeof(*olh) + 16 * sizeof(ipfw_xtable_info);
1715
1716 for (;;) {
1717 if ((olh = calloc(1, sz)) == NULL)
1718 return (ENOMEM);
1719
1720 olh->size = sz;
1721 if (do_get3(IP_FW_TABLES_XLIST, &olh->opheader, &sz) != 0) {
1722 sz = olh->size;
1723 free(olh);
1724 if (errno != ENOMEM)
1725 return (errno);
1726 continue;
1727 }
1728
1729 if (sort != 0)
1730 qsort(olh + 1, olh->count, olh->objsize,
1731 tablename_cmp);
1732
1733 info = (ipfw_xtable_info *)(olh + 1);
1734 for (i = 0; i < olh->count; i++) {
1735 if (g_co.use_set == 0 || info->set == g_co.use_set - 1)
1736 (void)f(info, arg);
1737 info = (ipfw_xtable_info *)((caddr_t)info +
1738 olh->objsize);
1739 }
1740 free(olh);
1741 break;
1742 }
1743 return (0);
1744 }
1745
1746
1747 /*
1748 * Retrieves all entries for given table @i in
1749 * eXtended format. Allocate buffer large enough
1750 * to store result. Called needs to free it later.
1751 *
1752 * Returns 0 on success.
1753 */
1754 static int
table_do_get_list(ipfw_xtable_info * i,ipfw_obj_header ** poh)1755 table_do_get_list(ipfw_xtable_info *i, ipfw_obj_header **poh)
1756 {
1757 ipfw_obj_header *oh;
1758 size_t sz;
1759 int c;
1760
1761 sz = 0;
1762 oh = NULL;
1763 for (c = 0; c < 8; c++) {
1764 if (sz < i->size)
1765 sz = i->size + 44;
1766 if (oh != NULL)
1767 free(oh);
1768 if ((oh = calloc(1, sz)) == NULL)
1769 continue;
1770 table_fill_objheader(oh, i);
1771 oh->opheader.version = 1; /* Current version */
1772 if (do_get3(IP_FW_TABLE_XLIST, &oh->opheader, &sz) == 0) {
1773 *poh = oh;
1774 return (0);
1775 }
1776
1777 if (errno != ENOMEM)
1778 break;
1779 }
1780 free(oh);
1781
1782 return (errno);
1783 }
1784
1785 /*
1786 * Shows all entries from @oh in human-readable format
1787 */
1788 static void
table_show_list(ipfw_obj_header * oh,int need_header)1789 table_show_list(ipfw_obj_header *oh, int need_header)
1790 {
1791 ipfw_obj_tentry *tent;
1792 uint32_t count;
1793 ipfw_xtable_info *i;
1794
1795 i = (ipfw_xtable_info *)(oh + 1);
1796 tent = (ipfw_obj_tentry *)(i + 1);
1797
1798 if (need_header)
1799 printf("--- table(%s), set(%u) ---\n", i->tablename, i->set);
1800
1801 count = i->count;
1802 while (count > 0) {
1803 table_show_entry(i, tent);
1804 tent = (ipfw_obj_tentry *)((caddr_t)tent + tent->head.length);
1805 count--;
1806 }
1807 }
1808
1809 static void
table_show_value(char * buf,size_t bufsize,ipfw_table_value * v,uint32_t vmask,int print_ip)1810 table_show_value(char *buf, size_t bufsize, ipfw_table_value *v,
1811 uint32_t vmask, int print_ip)
1812 {
1813 char abuf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2];
1814 struct sockaddr_in6 sa6;
1815 uint32_t flag, i, l;
1816 size_t sz;
1817 struct in_addr a4;
1818
1819 sz = bufsize;
1820
1821 /*
1822 * Some shorthands for printing values:
1823 * legacy assumes all values are equal, so keep the first one.
1824 */
1825 if (vmask == IPFW_VTYPE_LEGACY) {
1826 if (print_ip != 0) {
1827 flag = htonl(v->tag);
1828 inet_ntop(AF_INET, &flag, buf, sz);
1829 } else
1830 snprintf(buf, sz, "%u", v->tag);
1831 return;
1832 }
1833
1834 for (i = 1; i < (1u << 31); i *= 2) {
1835 if ((flag = (vmask & i)) == 0)
1836 continue;
1837 l = 0;
1838
1839 switch (flag) {
1840 case IPFW_VTYPE_TAG:
1841 l = snprintf(buf, sz, "%u,", v->tag);
1842 break;
1843 case IPFW_VTYPE_PIPE:
1844 l = snprintf(buf, sz, "%u,", v->pipe);
1845 break;
1846 case IPFW_VTYPE_DIVERT:
1847 l = snprintf(buf, sz, "%d,", v->divert);
1848 break;
1849 case IPFW_VTYPE_SKIPTO:
1850 l = snprintf(buf, sz, "%d,", v->skipto);
1851 break;
1852 case IPFW_VTYPE_NETGRAPH:
1853 l = snprintf(buf, sz, "%u,", v->netgraph);
1854 break;
1855 case IPFW_VTYPE_FIB:
1856 l = snprintf(buf, sz, "%u,", v->fib);
1857 break;
1858 case IPFW_VTYPE_NAT:
1859 l = snprintf(buf, sz, "%u,", v->nat);
1860 break;
1861 case IPFW_VTYPE_LIMIT:
1862 l = snprintf(buf, sz, "%u,", v->limit);
1863 break;
1864 case IPFW_VTYPE_NH4:
1865 a4.s_addr = htonl(v->nh4);
1866 inet_ntop(AF_INET, &a4, abuf, sizeof(abuf));
1867 l = snprintf(buf, sz, "%s,", abuf);
1868 break;
1869 case IPFW_VTYPE_DSCP:
1870 l = snprintf(buf, sz, "%d,", v->dscp);
1871 break;
1872 case IPFW_VTYPE_NH6:
1873 sa6.sin6_family = AF_INET6;
1874 sa6.sin6_len = sizeof(sa6);
1875 sa6.sin6_addr = v->nh6;
1876 sa6.sin6_port = 0;
1877 sa6.sin6_scope_id = v->zoneid;
1878 if (getnameinfo((const struct sockaddr *)&sa6,
1879 sa6.sin6_len, abuf, sizeof(abuf), NULL, 0,
1880 NI_NUMERICHOST) == 0)
1881 l = snprintf(buf, sz, "%s,", abuf);
1882 break;
1883 case IPFW_VTYPE_MARK:
1884 l = snprintf(buf, sz, "%#x,", v->mark);
1885 break;
1886 }
1887
1888 buf += l;
1889 sz -= l;
1890 }
1891
1892 if (sz != bufsize)
1893 *(buf - 1) = '\0';
1894 }
1895
1896 static void
table_show_entry(ipfw_xtable_info * i,ipfw_obj_tentry * tent)1897 table_show_entry(ipfw_xtable_info *i, ipfw_obj_tentry *tent)
1898 {
1899 char tbuf[128], pval[128];
1900 const char *comma;
1901 const u_char *mac;
1902 void *paddr;
1903 struct tflow_entry *tfe;
1904
1905 table_show_value(pval, sizeof(pval), &tent->v.value, i->vmask,
1906 g_co.do_value_as_ip);
1907
1908 switch (i->type) {
1909 case IPFW_TABLE_ADDR:
1910 /* IPv4 or IPv6 prefixes */
1911 inet_ntop(tent->subtype, &tent->k, tbuf, sizeof(tbuf));
1912 printf("%s/%u %s\n", tbuf, tent->masklen, pval);
1913 break;
1914 case IPFW_TABLE_MAC:
1915 /* MAC prefixes */
1916 mac = tent->k.mac;
1917 printf("%02x:%02x:%02x:%02x:%02x:%02x/%u %s\n",
1918 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
1919 tent->masklen, pval);
1920 break;
1921 case IPFW_TABLE_INTERFACE:
1922 /* Interface names */
1923 printf("%s %s\n", tent->k.iface, pval);
1924 break;
1925 case IPFW_TABLE_NUMBER:
1926 /* numbers */
1927 printf("%u %s\n", tent->k.key, pval);
1928 break;
1929 case IPFW_TABLE_FLOW:
1930 /* flows */
1931 tfe = &tent->k.flow;
1932 comma = "";
1933
1934 if ((i->tflags & IPFW_TFFLAG_SRCIP) != 0) {
1935 if (tfe->af == AF_INET)
1936 paddr = &tfe->a.a4.sip;
1937 else
1938 paddr = &tfe->a.a6.sip6;
1939
1940 inet_ntop(tfe->af, paddr, tbuf, sizeof(tbuf));
1941 printf("%s%s", comma, tbuf);
1942 comma = ",";
1943 }
1944
1945 if ((i->tflags & IPFW_TFFLAG_PROTO) != 0) {
1946 printf("%s%d", comma, tfe->proto);
1947 comma = ",";
1948 }
1949
1950 if ((i->tflags & IPFW_TFFLAG_SRCPORT) != 0) {
1951 printf("%s%d", comma, ntohs(tfe->sport));
1952 comma = ",";
1953 }
1954 if ((i->tflags & IPFW_TFFLAG_DSTIP) != 0) {
1955 if (tfe->af == AF_INET)
1956 paddr = &tfe->a.a4.dip;
1957 else
1958 paddr = &tfe->a.a6.dip6;
1959
1960 inet_ntop(tfe->af, paddr, tbuf, sizeof(tbuf));
1961 printf("%s%s", comma, tbuf);
1962 comma = ",";
1963 }
1964
1965 if ((i->tflags & IPFW_TFFLAG_DSTPORT) != 0) {
1966 printf("%s%d", comma, ntohs(tfe->dport));
1967 comma = ",";
1968 }
1969
1970 printf(" %s\n", pval);
1971 }
1972 }
1973
1974 static int
table_do_get_stdlist(uint16_t opcode,ipfw_obj_lheader ** polh)1975 table_do_get_stdlist(uint16_t opcode, ipfw_obj_lheader **polh)
1976 {
1977 ipfw_obj_lheader req, *olh;
1978 size_t sz;
1979
1980 memset(&req, 0, sizeof(req));
1981 sz = sizeof(req);
1982
1983 if (do_get3(opcode, &req.opheader, &sz) != 0)
1984 if (errno != ENOMEM)
1985 return (errno);
1986
1987 sz = req.size;
1988 if ((olh = calloc(1, sz)) == NULL)
1989 return (ENOMEM);
1990
1991 olh->size = sz;
1992 if (do_get3(opcode, &olh->opheader, &sz) != 0) {
1993 free(olh);
1994 return (errno);
1995 }
1996
1997 *polh = olh;
1998 return (0);
1999 }
2000
2001 static int
table_do_get_algolist(ipfw_obj_lheader ** polh)2002 table_do_get_algolist(ipfw_obj_lheader **polh)
2003 {
2004
2005 return (table_do_get_stdlist(IP_FW_TABLES_ALIST, polh));
2006 }
2007
2008 static int
table_do_get_vlist(ipfw_obj_lheader ** polh)2009 table_do_get_vlist(ipfw_obj_lheader **polh)
2010 {
2011
2012 return (table_do_get_stdlist(IP_FW_TABLE_VLIST, polh));
2013 }
2014
2015 void
ipfw_list_ta(int ac __unused,char * av[]__unused)2016 ipfw_list_ta(int ac __unused, char *av[] __unused)
2017 {
2018 ipfw_obj_lheader *olh;
2019 ipfw_ta_info *info;
2020 const char *atype;
2021 uint32_t i;
2022 int error;
2023
2024 error = table_do_get_algolist(&olh);
2025 if (error != 0)
2026 err(EX_OSERR, "Unable to request algorithm list");
2027
2028 info = (ipfw_ta_info *)(olh + 1);
2029 for (i = 0; i < olh->count; i++) {
2030 if ((atype = match_value(tabletypes, info->type)) == NULL)
2031 atype = "unknown";
2032 printf("--- %s ---\n", info->algoname);
2033 printf(" type: %s\n refcount: %u\n", atype, info->refcnt);
2034
2035 info = (ipfw_ta_info *)((caddr_t)info + olh->objsize);
2036 }
2037
2038 free(olh);
2039 }
2040
2041
2042 static int
compare_values(const void * _a,const void * _b)2043 compare_values(const void *_a, const void *_b)
2044 {
2045 const ipfw_table_value *a, *b;
2046
2047 a = (const ipfw_table_value *)_a;
2048 b = (const ipfw_table_value *)_b;
2049
2050 if (a->kidx < b->kidx)
2051 return (-1);
2052 else if (a->kidx > b->kidx)
2053 return (1);
2054
2055 return (0);
2056 }
2057
2058 void
ipfw_list_values(int ac __unused,char * av[]__unused)2059 ipfw_list_values(int ac __unused, char *av[] __unused)
2060 {
2061 char buf[128];
2062 ipfw_obj_lheader *olh;
2063 ipfw_table_value *v;
2064 uint32_t i, vmask;
2065 int error;
2066
2067 error = table_do_get_vlist(&olh);
2068 if (error != 0)
2069 err(EX_OSERR, "Unable to request value list");
2070
2071 vmask = 0x7FFFFFFF; /* Similar to IPFW_VTYPE_LEGACY */
2072
2073 table_print_valheader(buf, sizeof(buf), vmask);
2074 printf("HEADER: %s\n", buf);
2075 v = (ipfw_table_value *)(olh + 1);
2076 qsort(v, olh->count, olh->objsize, compare_values);
2077 for (i = 0; i < olh->count; i++) {
2078 table_show_value(buf, sizeof(buf), (ipfw_table_value *)v,
2079 vmask, 0);
2080 printf("[%u] refs=%lu %s\n", v->kidx, (u_long)v->refcnt, buf);
2081 v = (ipfw_table_value *)((caddr_t)v + olh->objsize);
2082 }
2083
2084 free(olh);
2085 }
2086
2087 int
table_check_name(const char * tablename)2088 table_check_name(const char *tablename)
2089 {
2090
2091 if (ipfw_check_object_name(tablename) != 0)
2092 return (EINVAL);
2093 /* Restrict some 'special' names */
2094 if (strcmp(tablename, "all") == 0)
2095 return (EINVAL);
2096 return (0);
2097 }
2098
2099