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,uint32_t uidx)314 table_fill_ntlv(ipfw_obj_ntlv *ntlv, const char *name, uint8_t set,
315 uint32_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
1093 /* Try to provide more human-readable error */
1094 switch (error) {
1095 case EEXIST:
1096 etxt = "record already exists";
1097 break;
1098 case EFBIG:
1099 etxt = "limit hit";
1100 break;
1101 case ESRCH:
1102 etxt = "table not found";
1103 break;
1104 case ENOENT:
1105 etxt = "record not found";
1106 break;
1107 case EACCES:
1108 etxt = "table is locked";
1109 break;
1110 default:
1111 etxt = strerror(error);
1112 }
1113
1114 errx(EX_OSERR, "%s: %s", texterr, etxt);
1115 }
1116
1117 static int
table_do_lookup(ipfw_obj_header * oh,char * key,ipfw_xtable_info * xi,ipfw_obj_tentry * xtent)1118 table_do_lookup(ipfw_obj_header *oh, char *key, ipfw_xtable_info *xi,
1119 ipfw_obj_tentry *xtent)
1120 {
1121 char xbuf[sizeof(ipfw_obj_header) + sizeof(ipfw_obj_tentry)];
1122 ipfw_obj_tentry *tent;
1123 uint8_t type;
1124 uint32_t vmask;
1125 size_t sz;
1126
1127 memcpy(xbuf, oh, sizeof(*oh));
1128 oh = (ipfw_obj_header *)xbuf;
1129 tent = (ipfw_obj_tentry *)(oh + 1);
1130
1131 memset(tent, 0, sizeof(*tent));
1132 tent->head.length = sizeof(*tent);
1133 tent->idx = 1;
1134
1135 tentry_fill_key(oh, tent, key, 0, &type, &vmask, xi);
1136 oh->ntlv.type = type;
1137
1138 sz = sizeof(xbuf);
1139 if (do_get3(IP_FW_TABLE_XFIND, &oh->opheader, &sz) != 0)
1140 return (errno);
1141
1142 if (sz < sizeof(xbuf))
1143 return (EINVAL);
1144
1145 *xtent = *tent;
1146
1147 return (0);
1148 }
1149
1150 static void
table_lookup(ipfw_obj_header * oh,int ac,char * av[])1151 table_lookup(ipfw_obj_header *oh, int ac, char *av[])
1152 {
1153 ipfw_obj_tentry xtent;
1154 ipfw_xtable_info xi;
1155 char key[64];
1156 int error;
1157
1158 if (ac == 0)
1159 errx(EX_USAGE, "address required");
1160
1161 strlcpy(key, *av, sizeof(key));
1162
1163 memset(&xi, 0, sizeof(xi));
1164 error = table_do_lookup(oh, key, &xi, &xtent);
1165
1166 switch (error) {
1167 case 0:
1168 break;
1169 case ESRCH:
1170 errx(EX_UNAVAILABLE, "Table %s not found", oh->ntlv.name);
1171 case ENOENT:
1172 errx(EX_UNAVAILABLE, "Entry %s not found", *av);
1173 case ENOTSUP:
1174 errx(EX_UNAVAILABLE, "Table %s algo does not support "
1175 "\"lookup\" method", oh->ntlv.name);
1176 default:
1177 err(EX_OSERR, "getsockopt(IP_FW_TABLE_XFIND)");
1178 }
1179
1180 table_show_entry(&xi, &xtent);
1181 }
1182
1183 static void
tentry_fill_key_type(char * arg,ipfw_obj_tentry * tentry,uint8_t type,uint8_t tflags)1184 tentry_fill_key_type(char *arg, ipfw_obj_tentry *tentry, uint8_t type,
1185 uint8_t tflags)
1186 {
1187 char *p, *pp;
1188 int mask, af;
1189 struct in6_addr *paddr, tmp;
1190 struct ether_addr *mac;
1191 struct tflow_entry *tfe;
1192 uint32_t key, *pkey;
1193 uint16_t port;
1194 struct protoent *pent;
1195 struct servent *sent;
1196 int masklen;
1197
1198 mask = masklen = 0;
1199 af = 0;
1200 paddr = (struct in6_addr *)&tentry->k;
1201
1202 switch (type) {
1203 case IPFW_TABLE_ADDR:
1204 /* Remove / if exists */
1205 if ((p = strchr(arg, '/')) != NULL) {
1206 *p = '\0';
1207 mask = atoi(p + 1);
1208 }
1209
1210 if (inet_pton(AF_INET, arg, paddr) == 1) {
1211 if (p != NULL && mask > 32)
1212 errx(EX_DATAERR, "bad IPv4 mask width: %s",
1213 p + 1);
1214
1215 masklen = p ? mask : 32;
1216 af = AF_INET;
1217 } else if (inet_pton(AF_INET6, arg, paddr) == 1) {
1218 if (IN6_IS_ADDR_V4COMPAT(paddr))
1219 errx(EX_DATAERR,
1220 "Use IPv4 instead of v4-compatible");
1221 if (p != NULL && mask > 128)
1222 errx(EX_DATAERR, "bad IPv6 mask width: %s",
1223 p + 1);
1224
1225 masklen = p ? mask : 128;
1226 af = AF_INET6;
1227 } else {
1228 /* Assume FQDN */
1229 if (lookup_host(arg, (struct in_addr *)paddr) != 0)
1230 errx(EX_NOHOST, "hostname ``%s'' unknown", arg);
1231
1232 masklen = 32;
1233 type = IPFW_TABLE_ADDR;
1234 af = AF_INET;
1235 }
1236 break;
1237 case IPFW_TABLE_MAC:
1238 /* Remove / if exists */
1239 if ((p = strchr(arg, '/')) != NULL) {
1240 *p = '\0';
1241 mask = atoi(p + 1);
1242 }
1243
1244 if (p != NULL && mask > 8 * ETHER_ADDR_LEN)
1245 errx(EX_DATAERR, "bad MAC mask width: %s",
1246 p + 1);
1247
1248 if ((mac = ether_aton(arg)) == NULL)
1249 errx(EX_DATAERR, "Incorrect MAC address");
1250
1251 memcpy(tentry->k.mac, mac->octet, ETHER_ADDR_LEN);
1252 masklen = p ? mask : 8 * ETHER_ADDR_LEN;
1253 af = AF_LINK;
1254 break;
1255 case IPFW_TABLE_INTERFACE:
1256 /* Assume interface name. Copy significant data only */
1257 mask = MIN(strlen(arg), IF_NAMESIZE - 1);
1258 memcpy(paddr, arg, mask);
1259 /* Set mask to exact match */
1260 masklen = 8 * IF_NAMESIZE;
1261 break;
1262 case IPFW_TABLE_NUMBER:
1263 /* Port or any other key */
1264 key = strtol(arg, &p, 10);
1265 if (*p != '\0')
1266 errx(EX_DATAERR, "Invalid number: %s", arg);
1267
1268 pkey = (uint32_t *)paddr;
1269 *pkey = key;
1270 masklen = 32;
1271 break;
1272 case IPFW_TABLE_FLOW:
1273 /* Assume [src-ip][,proto][,src-port][,dst-ip][,dst-port] */
1274 tfe = &tentry->k.flow;
1275 af = 0;
1276
1277 /* Handle <ipv4|ipv6> */
1278 if ((tflags & IPFW_TFFLAG_SRCIP) != 0) {
1279 if ((p = strchr(arg, ',')) != NULL)
1280 *p++ = '\0';
1281 /* Determine family using temporary storage */
1282 if (inet_pton(AF_INET, arg, &tmp) == 1) {
1283 if (af != 0 && af != AF_INET)
1284 errx(EX_DATAERR,
1285 "Inconsistent address family\n");
1286 af = AF_INET;
1287 memcpy(&tfe->a.a4.sip, &tmp, 4);
1288 } else if (inet_pton(AF_INET6, arg, &tmp) == 1) {
1289 if (af != 0 && af != AF_INET6)
1290 errx(EX_DATAERR,
1291 "Inconsistent address family\n");
1292 af = AF_INET6;
1293 memcpy(&tfe->a.a6.sip6, &tmp, 16);
1294 }
1295
1296 arg = p;
1297 }
1298
1299 /* Handle <proto-num|proto-name> */
1300 if ((tflags & IPFW_TFFLAG_PROTO) != 0) {
1301 if (arg == NULL)
1302 errx(EX_DATAERR, "invalid key: proto missing");
1303 if ((p = strchr(arg, ',')) != NULL)
1304 *p++ = '\0';
1305
1306 key = strtol(arg, &pp, 10);
1307 if (*pp != '\0') {
1308 if ((pent = getprotobyname(arg)) == NULL)
1309 errx(EX_DATAERR, "Unknown proto: %s",
1310 arg);
1311 else
1312 key = pent->p_proto;
1313 }
1314
1315 if (key > 255)
1316 errx(EX_DATAERR, "Bad protocol number: %u",key);
1317
1318 tfe->proto = key;
1319
1320 arg = p;
1321 }
1322
1323 /* Handle <port-num|service-name> */
1324 if ((tflags & IPFW_TFFLAG_SRCPORT) != 0) {
1325 if (arg == NULL)
1326 errx(EX_DATAERR, "invalid key: src port missing");
1327 if ((p = strchr(arg, ',')) != NULL)
1328 *p++ = '\0';
1329
1330 port = htons(strtol(arg, &pp, 10));
1331 if (*pp != '\0') {
1332 if ((sent = getservbyname(arg, NULL)) == NULL)
1333 errx(EX_DATAERR, "Unknown service: %s",
1334 arg);
1335 port = sent->s_port;
1336 }
1337 tfe->sport = port;
1338 arg = p;
1339 }
1340
1341 /* Handle <ipv4|ipv6>*/
1342 if ((tflags & IPFW_TFFLAG_DSTIP) != 0) {
1343 if (arg == NULL)
1344 errx(EX_DATAERR, "invalid key: dst ip missing");
1345 if ((p = strchr(arg, ',')) != NULL)
1346 *p++ = '\0';
1347 /* Determine family using temporary storage */
1348 if (inet_pton(AF_INET, arg, &tmp) == 1) {
1349 if (af != 0 && af != AF_INET)
1350 errx(EX_DATAERR,
1351 "Inconsistent address family");
1352 af = AF_INET;
1353 memcpy(&tfe->a.a4.dip, &tmp, 4);
1354 } else if (inet_pton(AF_INET6, arg, &tmp) == 1) {
1355 if (af != 0 && af != AF_INET6)
1356 errx(EX_DATAERR,
1357 "Inconsistent address family");
1358 af = AF_INET6;
1359 memcpy(&tfe->a.a6.dip6, &tmp, 16);
1360 }
1361
1362 arg = p;
1363 }
1364
1365 /* Handle <port-num|service-name> */
1366 if ((tflags & IPFW_TFFLAG_DSTPORT) != 0) {
1367 if (arg == NULL)
1368 errx(EX_DATAERR, "invalid key: dst port missing");
1369 if ((p = strchr(arg, ',')) != NULL)
1370 *p++ = '\0';
1371
1372 port = htons(strtol(arg, &pp, 10));
1373 if (*pp != '\0') {
1374 if ((sent = getservbyname(arg, NULL)) == NULL)
1375 errx(EX_DATAERR, "Unknown service: %s",
1376 arg);
1377 port = sent->s_port;
1378 }
1379 tfe->dport = port;
1380 arg = p;
1381 }
1382
1383 tfe->af = af;
1384
1385 break;
1386
1387 default:
1388 errx(EX_DATAERR, "Unsupported table type: %d", type);
1389 }
1390
1391 tentry->subtype = af;
1392 tentry->masklen = masklen;
1393 }
1394
1395 /*
1396 * Tries to guess table key type.
1397 * This procedure is used in legacy table auto-create
1398 * code AND in `ipfw -n` ruleset checking.
1399 *
1400 * Imported from old table_fill_xentry() parse code.
1401 */
1402 static int
guess_key_type(char * key,uint8_t * ptype)1403 guess_key_type(char *key, uint8_t *ptype)
1404 {
1405 char *p;
1406 struct in6_addr addr;
1407
1408 if (ishexnumber(*key) != 0 || *key == ':') {
1409 /* Remove / if exists */
1410 if ((p = strchr(key, '/')) != NULL)
1411 *p = '\0';
1412
1413 if ((inet_pton(AF_INET, key, &addr) == 1) ||
1414 (inet_pton(AF_INET6, key, &addr) == 1)) {
1415 *ptype = IPFW_TABLE_CIDR;
1416 if (p != NULL)
1417 *p = '/';
1418 return (0);
1419 } else {
1420 /* Port or any other key */
1421 /* Skip non-base 10 entries like 'fa1' */
1422 (void)strtol(key, &p, 10);
1423 if (*p == '\0') {
1424 *ptype = IPFW_TABLE_NUMBER;
1425 return (0);
1426 } else if ((p != key) && (*p == '.')) {
1427 /*
1428 * Warn on IPv4 address strings
1429 * which are "valid" for inet_aton() but not
1430 * in inet_pton().
1431 *
1432 * Typical examples: '10.5' or '10.0.0.05'
1433 */
1434 return (1);
1435 }
1436 }
1437 }
1438
1439 if (strchr(key, '.') == NULL) {
1440 *ptype = IPFW_TABLE_INTERFACE;
1441 return (0);
1442 }
1443
1444 if (lookup_host(key, (struct in_addr *)&addr) != 0)
1445 return (1);
1446
1447 *ptype = IPFW_TABLE_CIDR;
1448 return (0);
1449 }
1450
1451 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)1452 tentry_fill_key(ipfw_obj_header *oh, ipfw_obj_tentry *tent, char *key,
1453 int add, uint8_t *ptype, uint32_t *pvmask, ipfw_xtable_info *xi)
1454 {
1455 uint8_t type, tflags;
1456 uint32_t vmask;
1457 int error;
1458
1459 type = 0;
1460 tflags = 0;
1461 vmask = 0;
1462
1463 if (xi->tablename[0] == '\0')
1464 error = table_get_info(oh, xi);
1465 else
1466 error = 0;
1467
1468 if (error == 0) {
1469 if (g_co.test_only == 0) {
1470 /* Table found */
1471 type = xi->type;
1472 tflags = xi->tflags;
1473 vmask = xi->vmask;
1474 } else {
1475 /*
1476 * We're running `ipfw -n`
1477 * Compatibility layer: try to guess key type
1478 * before failing.
1479 */
1480 if (guess_key_type(key, &type) != 0) {
1481 /* Inknown key */
1482 errx(EX_USAGE, "Cannot guess "
1483 "key '%s' type", key);
1484 }
1485 vmask = IPFW_VTYPE_LEGACY;
1486 }
1487 } else {
1488 if (error != ESRCH)
1489 errx(EX_OSERR, "Error requesting table %s info",
1490 oh->ntlv.name);
1491 if (add == 0)
1492 errx(EX_DATAERR, "Table %s does not exist",
1493 oh->ntlv.name);
1494 /*
1495 * Table does not exist
1496 * Compatibility layer: try to guess key type before failing.
1497 */
1498 if (guess_key_type(key, &type) != 0) {
1499 /* Inknown key */
1500 errx(EX_USAGE, "Table %s does not exist, cannot guess "
1501 "key '%s' type", oh->ntlv.name, key);
1502 }
1503
1504 vmask = IPFW_VTYPE_LEGACY;
1505 }
1506
1507 tentry_fill_key_type(key, tent, type, tflags);
1508
1509 *ptype = type;
1510 *pvmask = vmask;
1511 }
1512
1513 static void
set_legacy_value(uint32_t val,ipfw_table_value * v)1514 set_legacy_value(uint32_t val, ipfw_table_value *v)
1515 {
1516 v->tag = val;
1517 v->pipe = val;
1518 v->divert = val;
1519 v->skipto = val;
1520 v->netgraph = val;
1521 v->fib = val;
1522 v->nat = val;
1523 v->nh4 = val;
1524 v->dscp = (uint8_t)val;
1525 v->limit = val;
1526 }
1527
1528 static void
tentry_fill_value(ipfw_obj_header * oh __unused,ipfw_obj_tentry * tent,char * arg,uint8_t type __unused,uint32_t vmask)1529 tentry_fill_value(ipfw_obj_header *oh __unused, ipfw_obj_tentry *tent,
1530 char *arg, uint8_t type __unused, uint32_t vmask)
1531 {
1532 struct addrinfo hints, *res;
1533 struct in_addr ipaddr;
1534 const char *etype;
1535 char *comma, *e, *n, *p;
1536 uint32_t a4, flag, val;
1537 ipfw_table_value *v;
1538 uint32_t i;
1539 int dval;
1540
1541 v = &tent->v.value;
1542
1543 /* Compat layer: keep old behavior for legacy value types */
1544 if (vmask == IPFW_VTYPE_LEGACY) {
1545 /* Try to interpret as number first */
1546 val = strtoul(arg, &p, 0);
1547 if (*p == '\0') {
1548 set_legacy_value(val, v);
1549 return;
1550 }
1551 if (inet_pton(AF_INET, arg, &val) == 1) {
1552 set_legacy_value(ntohl(val), v);
1553 return;
1554 }
1555 /* Try hostname */
1556 if (lookup_host(arg, &ipaddr) == 0) {
1557 set_legacy_value(ntohl(ipaddr.s_addr), v);
1558 return;
1559 }
1560 errx(EX_OSERR, "Unable to parse value %s", arg);
1561 }
1562
1563 /*
1564 * Shorthands: handle single value if vmask consists
1565 * of numbers only. e.g.:
1566 * vmask = "fib,skipto" -> treat input "1" as "1,1"
1567 */
1568
1569 n = arg;
1570 etype = NULL;
1571 for (i = 1; i < (1u << 31); i *= 2) {
1572 if ((flag = (vmask & i)) == 0)
1573 continue;
1574 vmask &= ~flag;
1575
1576 if ((comma = strchr(n, ',')) != NULL)
1577 *comma = '\0';
1578
1579 switch (flag) {
1580 case IPFW_VTYPE_TAG:
1581 v->tag = strtol(n, &e, 10);
1582 if (*e != '\0')
1583 etype = "tag";
1584 break;
1585 case IPFW_VTYPE_PIPE:
1586 v->pipe = strtol(n, &e, 10);
1587 if (*e != '\0')
1588 etype = "pipe";
1589 break;
1590 case IPFW_VTYPE_DIVERT:
1591 v->divert = strtol(n, &e, 10);
1592 if (*e != '\0')
1593 etype = "divert";
1594 break;
1595 case IPFW_VTYPE_SKIPTO:
1596 v->skipto = strtol(n, &e, 10);
1597 if (*e != '\0')
1598 etype = "skipto";
1599 break;
1600 case IPFW_VTYPE_NETGRAPH:
1601 v->netgraph = strtol(n, &e, 10);
1602 if (*e != '\0')
1603 etype = "netgraph";
1604 break;
1605 case IPFW_VTYPE_FIB:
1606 v->fib = strtol(n, &e, 10);
1607 if (*e != '\0')
1608 etype = "fib";
1609 break;
1610 case IPFW_VTYPE_NAT:
1611 v->nat = strtol(n, &e, 10);
1612 if (*e != '\0')
1613 etype = "nat";
1614 break;
1615 case IPFW_VTYPE_LIMIT:
1616 v->limit = strtol(n, &e, 10);
1617 if (*e != '\0')
1618 etype = "limit";
1619 break;
1620 case IPFW_VTYPE_NH4:
1621 if (strchr(n, '.') != NULL &&
1622 inet_pton(AF_INET, n, &a4) == 1) {
1623 v->nh4 = ntohl(a4);
1624 break;
1625 }
1626 if (lookup_host(n, &ipaddr) == 0) {
1627 v->nh4 = ntohl(ipaddr.s_addr);
1628 break;
1629 }
1630 etype = "ipv4";
1631 break;
1632 case IPFW_VTYPE_DSCP:
1633 if (isalpha(*n)) {
1634 if ((dval = match_token(f_ipdscp, n)) != -1) {
1635 v->dscp = dval;
1636 break;
1637 } else
1638 etype = "DSCP code";
1639 } else {
1640 v->dscp = strtol(n, &e, 10);
1641 if (v->dscp > 63 || *e != '\0')
1642 etype = "DSCP value";
1643 }
1644 break;
1645 case IPFW_VTYPE_NH6:
1646 if (strchr(n, ':') != NULL) {
1647 memset(&hints, 0, sizeof(hints));
1648 hints.ai_family = AF_INET6;
1649 hints.ai_flags = AI_NUMERICHOST;
1650 if (getaddrinfo(n, NULL, &hints, &res) == 0) {
1651 v->nh6 = ((struct sockaddr_in6 *)
1652 res->ai_addr)->sin6_addr;
1653 v->zoneid = ((struct sockaddr_in6 *)
1654 res->ai_addr)->sin6_scope_id;
1655 freeaddrinfo(res);
1656 break;
1657 }
1658 }
1659 etype = "ipv6";
1660 break;
1661 case IPFW_VTYPE_MARK:
1662 v->mark = strtol(n, &e, 16);
1663 if (*e != '\0')
1664 etype = "mark";
1665 break;
1666 }
1667
1668 if (etype != NULL)
1669 errx(EX_USAGE, "Unable to parse %s as %s", n, etype);
1670
1671 if (comma != NULL)
1672 *comma++ = ',';
1673
1674 if ((n = comma) != NULL)
1675 continue;
1676
1677 /* End of input. */
1678 if (vmask != 0)
1679 errx(EX_USAGE, "Not enough fields inside value");
1680 }
1681 }
1682
1683 /*
1684 * Compare table names.
1685 * Honor number comparison.
1686 */
1687 static int
tablename_cmp(const void * a,const void * b)1688 tablename_cmp(const void *a, const void *b)
1689 {
1690 const ipfw_xtable_info *ia, *ib;
1691
1692 ia = (const ipfw_xtable_info *)a;
1693 ib = (const ipfw_xtable_info *)b;
1694
1695 return (stringnum_cmp(ia->tablename, ib->tablename));
1696 }
1697
1698 /*
1699 * Retrieves table list from kernel,
1700 * optionally sorts it and calls requested function for each table.
1701 * Returns 0 on success.
1702 */
1703 static int
tables_foreach(table_cb_t * f,void * arg,int sort)1704 tables_foreach(table_cb_t *f, void *arg, int sort)
1705 {
1706 ipfw_obj_lheader *olh;
1707 ipfw_xtable_info *info;
1708 size_t sz;
1709 uint32_t i;
1710
1711 /* Start with reasonable default */
1712 sz = sizeof(*olh) + 16 * sizeof(ipfw_xtable_info);
1713
1714 for (;;) {
1715 if ((olh = calloc(1, sz)) == NULL)
1716 return (ENOMEM);
1717
1718 olh->size = sz;
1719 if (do_get3(IP_FW_TABLES_XLIST, &olh->opheader, &sz) != 0) {
1720 sz = olh->size;
1721 free(olh);
1722 if (errno != ENOMEM)
1723 return (errno);
1724 continue;
1725 }
1726
1727 if (sort != 0)
1728 qsort(olh + 1, olh->count, olh->objsize,
1729 tablename_cmp);
1730
1731 info = (ipfw_xtable_info *)(olh + 1);
1732 for (i = 0; i < olh->count; i++) {
1733 if (g_co.use_set == 0 || info->set == g_co.use_set - 1)
1734 (void)f(info, arg);
1735 info = (ipfw_xtable_info *)((caddr_t)info +
1736 olh->objsize);
1737 }
1738 free(olh);
1739 break;
1740 }
1741 return (0);
1742 }
1743
1744
1745 /*
1746 * Retrieves all entries for given table @i in
1747 * eXtended format. Allocate buffer large enough
1748 * to store result. Called needs to free it later.
1749 *
1750 * Returns 0 on success.
1751 */
1752 static int
table_do_get_list(ipfw_xtable_info * i,ipfw_obj_header ** poh)1753 table_do_get_list(ipfw_xtable_info *i, ipfw_obj_header **poh)
1754 {
1755 ipfw_obj_header *oh;
1756 size_t sz;
1757 int c;
1758
1759 sz = 0;
1760 oh = NULL;
1761 for (c = 0; c < 8; c++) {
1762 if (sz < i->size)
1763 sz = i->size + 44;
1764 if (oh != NULL)
1765 free(oh);
1766 if ((oh = calloc(1, sz)) == NULL)
1767 continue;
1768 table_fill_objheader(oh, i);
1769 oh->opheader.version = 1; /* Current version */
1770 if (do_get3(IP_FW_TABLE_XLIST, &oh->opheader, &sz) == 0) {
1771 *poh = oh;
1772 return (0);
1773 }
1774
1775 if (errno != ENOMEM)
1776 break;
1777 }
1778 free(oh);
1779
1780 return (errno);
1781 }
1782
1783 /*
1784 * Shows all entries from @oh in human-readable format
1785 */
1786 static void
table_show_list(ipfw_obj_header * oh,int need_header)1787 table_show_list(ipfw_obj_header *oh, int need_header)
1788 {
1789 ipfw_obj_tentry *tent;
1790 uint32_t count;
1791 ipfw_xtable_info *i;
1792
1793 i = (ipfw_xtable_info *)(oh + 1);
1794 tent = (ipfw_obj_tentry *)(i + 1);
1795
1796 if (need_header)
1797 printf("--- table(%s), set(%u) ---\n", i->tablename, i->set);
1798
1799 count = i->count;
1800 while (count > 0) {
1801 table_show_entry(i, tent);
1802 tent = (ipfw_obj_tentry *)((caddr_t)tent + tent->head.length);
1803 count--;
1804 }
1805 }
1806
1807 static void
table_show_value(char * buf,size_t bufsize,ipfw_table_value * v,uint32_t vmask,int print_ip)1808 table_show_value(char *buf, size_t bufsize, ipfw_table_value *v,
1809 uint32_t vmask, int print_ip)
1810 {
1811 char abuf[INET6_ADDRSTRLEN + IF_NAMESIZE + 2];
1812 struct sockaddr_in6 sa6;
1813 uint32_t flag, i, l;
1814 size_t sz;
1815 struct in_addr a4;
1816
1817 sz = bufsize;
1818
1819 /*
1820 * Some shorthands for printing values:
1821 * legacy assumes all values are equal, so keep the first one.
1822 */
1823 if (vmask == IPFW_VTYPE_LEGACY) {
1824 if (print_ip != 0) {
1825 flag = htonl(v->tag);
1826 inet_ntop(AF_INET, &flag, buf, sz);
1827 } else
1828 snprintf(buf, sz, "%u", v->tag);
1829 return;
1830 }
1831
1832 for (i = 1; i < (1u << 31); i *= 2) {
1833 if ((flag = (vmask & i)) == 0)
1834 continue;
1835 l = 0;
1836
1837 switch (flag) {
1838 case IPFW_VTYPE_TAG:
1839 l = snprintf(buf, sz, "%u,", v->tag);
1840 break;
1841 case IPFW_VTYPE_PIPE:
1842 l = snprintf(buf, sz, "%u,", v->pipe);
1843 break;
1844 case IPFW_VTYPE_DIVERT:
1845 l = snprintf(buf, sz, "%d,", v->divert);
1846 break;
1847 case IPFW_VTYPE_SKIPTO:
1848 l = snprintf(buf, sz, "%d,", v->skipto);
1849 break;
1850 case IPFW_VTYPE_NETGRAPH:
1851 l = snprintf(buf, sz, "%u,", v->netgraph);
1852 break;
1853 case IPFW_VTYPE_FIB:
1854 l = snprintf(buf, sz, "%u,", v->fib);
1855 break;
1856 case IPFW_VTYPE_NAT:
1857 l = snprintf(buf, sz, "%u,", v->nat);
1858 break;
1859 case IPFW_VTYPE_LIMIT:
1860 l = snprintf(buf, sz, "%u,", v->limit);
1861 break;
1862 case IPFW_VTYPE_NH4:
1863 a4.s_addr = htonl(v->nh4);
1864 inet_ntop(AF_INET, &a4, abuf, sizeof(abuf));
1865 l = snprintf(buf, sz, "%s,", abuf);
1866 break;
1867 case IPFW_VTYPE_DSCP:
1868 l = snprintf(buf, sz, "%d,", v->dscp);
1869 break;
1870 case IPFW_VTYPE_NH6:
1871 sa6.sin6_family = AF_INET6;
1872 sa6.sin6_len = sizeof(sa6);
1873 sa6.sin6_addr = v->nh6;
1874 sa6.sin6_port = 0;
1875 sa6.sin6_scope_id = v->zoneid;
1876 if (getnameinfo((const struct sockaddr *)&sa6,
1877 sa6.sin6_len, abuf, sizeof(abuf), NULL, 0,
1878 NI_NUMERICHOST) == 0)
1879 l = snprintf(buf, sz, "%s,", abuf);
1880 break;
1881 case IPFW_VTYPE_MARK:
1882 l = snprintf(buf, sz, "%#x,", v->mark);
1883 break;
1884 }
1885
1886 buf += l;
1887 sz -= l;
1888 }
1889
1890 if (sz != bufsize)
1891 *(buf - 1) = '\0';
1892 }
1893
1894 static void
table_show_entry(ipfw_xtable_info * i,ipfw_obj_tentry * tent)1895 table_show_entry(ipfw_xtable_info *i, ipfw_obj_tentry *tent)
1896 {
1897 char tbuf[128], pval[128];
1898 const char *comma;
1899 const u_char *mac;
1900 void *paddr;
1901 struct tflow_entry *tfe;
1902
1903 table_show_value(pval, sizeof(pval), &tent->v.value, i->vmask,
1904 g_co.do_value_as_ip);
1905
1906 switch (i->type) {
1907 case IPFW_TABLE_ADDR:
1908 /* IPv4 or IPv6 prefixes */
1909 inet_ntop(tent->subtype, &tent->k, tbuf, sizeof(tbuf));
1910 printf("%s/%u %s\n", tbuf, tent->masklen, pval);
1911 break;
1912 case IPFW_TABLE_MAC:
1913 /* MAC prefixes */
1914 mac = tent->k.mac;
1915 printf("%02x:%02x:%02x:%02x:%02x:%02x/%u %s\n",
1916 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
1917 tent->masklen, pval);
1918 break;
1919 case IPFW_TABLE_INTERFACE:
1920 /* Interface names */
1921 printf("%s %s\n", tent->k.iface, pval);
1922 break;
1923 case IPFW_TABLE_NUMBER:
1924 /* numbers */
1925 printf("%u %s\n", tent->k.key, pval);
1926 break;
1927 case IPFW_TABLE_FLOW:
1928 /* flows */
1929 tfe = &tent->k.flow;
1930 comma = "";
1931
1932 if ((i->tflags & IPFW_TFFLAG_SRCIP) != 0) {
1933 if (tfe->af == AF_INET)
1934 paddr = &tfe->a.a4.sip;
1935 else
1936 paddr = &tfe->a.a6.sip6;
1937
1938 inet_ntop(tfe->af, paddr, tbuf, sizeof(tbuf));
1939 printf("%s%s", comma, tbuf);
1940 comma = ",";
1941 }
1942
1943 if ((i->tflags & IPFW_TFFLAG_PROTO) != 0) {
1944 printf("%s%d", comma, tfe->proto);
1945 comma = ",";
1946 }
1947
1948 if ((i->tflags & IPFW_TFFLAG_SRCPORT) != 0) {
1949 printf("%s%d", comma, ntohs(tfe->sport));
1950 comma = ",";
1951 }
1952 if ((i->tflags & IPFW_TFFLAG_DSTIP) != 0) {
1953 if (tfe->af == AF_INET)
1954 paddr = &tfe->a.a4.dip;
1955 else
1956 paddr = &tfe->a.a6.dip6;
1957
1958 inet_ntop(tfe->af, paddr, tbuf, sizeof(tbuf));
1959 printf("%s%s", comma, tbuf);
1960 comma = ",";
1961 }
1962
1963 if ((i->tflags & IPFW_TFFLAG_DSTPORT) != 0) {
1964 printf("%s%d", comma, ntohs(tfe->dport));
1965 comma = ",";
1966 }
1967
1968 printf(" %s\n", pval);
1969 }
1970 }
1971
1972 static int
table_do_get_stdlist(uint16_t opcode,ipfw_obj_lheader ** polh)1973 table_do_get_stdlist(uint16_t opcode, ipfw_obj_lheader **polh)
1974 {
1975 ipfw_obj_lheader req, *olh;
1976 size_t sz;
1977
1978 memset(&req, 0, sizeof(req));
1979 sz = sizeof(req);
1980
1981 if (do_get3(opcode, &req.opheader, &sz) != 0)
1982 if (errno != ENOMEM)
1983 return (errno);
1984
1985 sz = req.size;
1986 if ((olh = calloc(1, sz)) == NULL)
1987 return (ENOMEM);
1988
1989 olh->size = sz;
1990 if (do_get3(opcode, &olh->opheader, &sz) != 0) {
1991 free(olh);
1992 return (errno);
1993 }
1994
1995 *polh = olh;
1996 return (0);
1997 }
1998
1999 static int
table_do_get_algolist(ipfw_obj_lheader ** polh)2000 table_do_get_algolist(ipfw_obj_lheader **polh)
2001 {
2002
2003 return (table_do_get_stdlist(IP_FW_TABLES_ALIST, polh));
2004 }
2005
2006 static int
table_do_get_vlist(ipfw_obj_lheader ** polh)2007 table_do_get_vlist(ipfw_obj_lheader **polh)
2008 {
2009
2010 return (table_do_get_stdlist(IP_FW_TABLE_VLIST, polh));
2011 }
2012
2013 void
ipfw_list_ta(int ac __unused,char * av[]__unused)2014 ipfw_list_ta(int ac __unused, char *av[] __unused)
2015 {
2016 ipfw_obj_lheader *olh;
2017 ipfw_ta_info *info;
2018 const char *atype;
2019 uint32_t i;
2020 int error;
2021
2022 error = table_do_get_algolist(&olh);
2023 if (error != 0)
2024 err(EX_OSERR, "Unable to request algorithm list");
2025
2026 info = (ipfw_ta_info *)(olh + 1);
2027 for (i = 0; i < olh->count; i++) {
2028 if ((atype = match_value(tabletypes, info->type)) == NULL)
2029 atype = "unknown";
2030 printf("--- %s ---\n", info->algoname);
2031 printf(" type: %s\n refcount: %u\n", atype, info->refcnt);
2032
2033 info = (ipfw_ta_info *)((caddr_t)info + olh->objsize);
2034 }
2035
2036 free(olh);
2037 }
2038
2039
2040 static int
compare_values(const void * _a,const void * _b)2041 compare_values(const void *_a, const void *_b)
2042 {
2043 const ipfw_table_value *a, *b;
2044
2045 a = (const ipfw_table_value *)_a;
2046 b = (const ipfw_table_value *)_b;
2047
2048 if (a->kidx < b->kidx)
2049 return (-1);
2050 else if (a->kidx > b->kidx)
2051 return (1);
2052
2053 return (0);
2054 }
2055
2056 void
ipfw_list_values(int ac __unused,char * av[]__unused)2057 ipfw_list_values(int ac __unused, char *av[] __unused)
2058 {
2059 char buf[128];
2060 ipfw_obj_lheader *olh;
2061 ipfw_table_value *v;
2062 uint32_t i, vmask;
2063 int error;
2064
2065 error = table_do_get_vlist(&olh);
2066 if (error != 0)
2067 err(EX_OSERR, "Unable to request value list");
2068
2069 vmask = 0x7FFFFFFF; /* Similar to IPFW_VTYPE_LEGACY */
2070
2071 table_print_valheader(buf, sizeof(buf), vmask);
2072 printf("HEADER: %s\n", buf);
2073 v = (ipfw_table_value *)(olh + 1);
2074 qsort(v, olh->count, olh->objsize, compare_values);
2075 for (i = 0; i < olh->count; i++) {
2076 table_show_value(buf, sizeof(buf), (ipfw_table_value *)v,
2077 vmask, 0);
2078 printf("[%u] refs=%lu %s\n", v->kidx, (u_long)v->refcnt, buf);
2079 v = (ipfw_table_value *)((caddr_t)v + olh->objsize);
2080 }
2081
2082 free(olh);
2083 }
2084
2085 int
table_check_name(const char * tablename)2086 table_check_name(const char *tablename)
2087 {
2088
2089 if (ipfw_check_object_name(tablename) != 0)
2090 return (EINVAL);
2091 /* Restrict some 'special' names */
2092 if (strcmp(tablename, "all") == 0)
2093 return (EINVAL);
2094 return (0);
2095 }
2096
2097