19 #include <netinet/in.h>
23 #include <libmnl/libmnl.h>
24 #include <linux/netfilter/nfnetlink.h>
25 #include <linux/netfilter/nf_tables.h>
26 #include <linux/netfilter.h>
27 #include <linux/netfilter_arp.h>
29 #include <libnftnl/chain.h>
30 #include <libnftnl/rule.h>
33 struct list_head head;
34 struct hlist_node hnode;
40 const char **dev_array;
53 struct list_head rule_list;
56 static const char *nftnl_hooknum2str(
int family,
int hooknum)
64 case NF_INET_PRE_ROUTING:
66 case NF_INET_LOCAL_IN:
70 case NF_INET_LOCAL_OUT:
72 case NF_INET_POST_ROUTING:
88 case NF_NETDEV_INGRESS:
96 EXPORT_SYMBOL(nftnl_chain_alloc);
105 INIT_LIST_HEAD(&c->rule_list);
110 EXPORT_SYMBOL(nftnl_chain_free);
113 struct nftnl_rule *r, *tmp;
116 list_for_each_entry_safe(r, tmp, &c->rule_list, head)
119 if (c->flags & (1 << NFTNL_CHAIN_NAME))
121 if (c->flags & (1 << NFTNL_CHAIN_TABLE))
123 if (c->flags & (1 << NFTNL_CHAIN_TYPE))
125 if (c->flags & (1 << NFTNL_CHAIN_DEV))
127 if (c->flags & (1 << NFTNL_CHAIN_DEVICES)) {
128 for (i = 0; i < c->dev_array_len; i++)
129 xfree(c->dev_array[i]);
136 EXPORT_SYMBOL(nftnl_chain_is_set);
137 bool nftnl_chain_is_set(
const struct nftnl_chain *c, uint16_t attr)
139 return c->flags & (1 << attr);
142 EXPORT_SYMBOL(nftnl_chain_unset);
143 void nftnl_chain_unset(
struct nftnl_chain *c, uint16_t attr)
147 if (!(c->flags & (1 << attr)))
151 case NFTNL_CHAIN_NAME:
154 case NFTNL_CHAIN_TABLE:
157 case NFTNL_CHAIN_USE:
159 case NFTNL_CHAIN_TYPE:
162 case NFTNL_CHAIN_HOOKNUM:
163 case NFTNL_CHAIN_PRIO:
164 case NFTNL_CHAIN_POLICY:
165 case NFTNL_CHAIN_BYTES:
166 case NFTNL_CHAIN_PACKETS:
167 case NFTNL_CHAIN_HANDLE:
168 case NFTNL_CHAIN_FAMILY:
169 case NFTNL_CHAIN_FLAGS:
171 case NFTNL_CHAIN_DEV:
174 case NFTNL_CHAIN_DEVICES:
175 for (i = 0; i < c->dev_array_len; i++)
176 xfree(c->dev_array[i]);
183 c->flags &= ~(1 << attr);
186 static uint32_t nftnl_chain_validate[NFTNL_CHAIN_MAX + 1] = {
187 [NFTNL_CHAIN_HOOKNUM] =
sizeof(uint32_t),
188 [NFTNL_CHAIN_PRIO] =
sizeof(int32_t),
189 [NFTNL_CHAIN_POLICY] =
sizeof(uint32_t),
190 [NFTNL_CHAIN_BYTES] =
sizeof(uint64_t),
191 [NFTNL_CHAIN_PACKETS] =
sizeof(uint64_t),
192 [NFTNL_CHAIN_HANDLE] =
sizeof(uint64_t),
193 [NFTNL_CHAIN_FAMILY] =
sizeof(uint32_t),
194 [NFTNL_CHAIN_FLAGS] =
sizeof(uint32_t),
197 EXPORT_SYMBOL(nftnl_chain_set_data);
198 int nftnl_chain_set_data(
struct nftnl_chain *c, uint16_t attr,
199 const void *data, uint32_t data_len)
201 const char **dev_array;
204 nftnl_assert_attr_exists(attr, NFTNL_CHAIN_MAX);
205 nftnl_assert_validate(data, nftnl_chain_validate, attr, data_len);
208 case NFTNL_CHAIN_NAME:
209 if (c->flags & (1 << NFTNL_CHAIN_NAME))
212 c->name = strdup(data);
216 case NFTNL_CHAIN_TABLE:
217 if (c->flags & (1 << NFTNL_CHAIN_TABLE))
220 c->table = strdup(data);
224 case NFTNL_CHAIN_HOOKNUM:
225 memcpy(&c->hooknum, data,
sizeof(c->hooknum));
227 case NFTNL_CHAIN_PRIO:
228 memcpy(&c->prio, data,
sizeof(c->prio));
230 case NFTNL_CHAIN_POLICY:
231 memcpy(&c->policy, data,
sizeof(c->policy));
233 case NFTNL_CHAIN_USE:
234 memcpy(&c->use, data,
sizeof(c->use));
236 case NFTNL_CHAIN_BYTES:
237 memcpy(&c->bytes, data,
sizeof(c->bytes));
239 case NFTNL_CHAIN_PACKETS:
240 memcpy(&c->packets, data,
sizeof(c->packets));
242 case NFTNL_CHAIN_HANDLE:
243 memcpy(&c->handle, data,
sizeof(c->handle));
245 case NFTNL_CHAIN_FAMILY:
246 memcpy(&c->family, data,
sizeof(c->family));
248 case NFTNL_CHAIN_TYPE:
249 if (c->flags & (1 << NFTNL_CHAIN_TYPE))
252 c->type = strdup(data);
256 case NFTNL_CHAIN_DEV:
257 if (c->flags & (1 << NFTNL_CHAIN_DEV))
260 c->dev = strdup(data);
264 case NFTNL_CHAIN_DEVICES:
265 dev_array = (
const char **)data;
266 while (dev_array[len] != NULL)
269 if (c->flags & (1 << NFTNL_CHAIN_DEVICES)) {
270 for (i = 0; i < c->dev_array_len; i++)
271 xfree(c->dev_array[i]);
275 c->dev_array = calloc(len + 1,
sizeof(
char *));
279 for (i = 0; i < len; i++)
280 c->dev_array[i] = strdup(dev_array[i]);
282 c->dev_array_len = len;
284 case NFTNL_CHAIN_FLAGS:
285 memcpy(&c->chain_flags, data,
sizeof(c->chain_flags));
288 c->flags |= (1 << attr);
292 void nftnl_chain_set(
struct nftnl_chain *c, uint16_t attr,
const void *data) __visible;
293 void nftnl_chain_set(
struct nftnl_chain *c, uint16_t attr,
const void *data)
295 nftnl_chain_set_data(c, attr, data, nftnl_chain_validate[attr]);
298 EXPORT_SYMBOL(nftnl_chain_set_u32);
299 void nftnl_chain_set_u32(
struct nftnl_chain *c, uint16_t attr, uint32_t data)
301 nftnl_chain_set_data(c, attr, &data,
sizeof(uint32_t));
304 EXPORT_SYMBOL(nftnl_chain_set_s32);
305 void nftnl_chain_set_s32(
struct nftnl_chain *c, uint16_t attr, int32_t data)
307 nftnl_chain_set_data(c, attr, &data,
sizeof(int32_t));
310 EXPORT_SYMBOL(nftnl_chain_set_u64);
311 void nftnl_chain_set_u64(
struct nftnl_chain *c, uint16_t attr, uint64_t data)
313 nftnl_chain_set_data(c, attr, &data,
sizeof(uint64_t));
316 EXPORT_SYMBOL(nftnl_chain_set_u8);
317 void nftnl_chain_set_u8(
struct nftnl_chain *c, uint16_t attr, uint8_t data)
319 nftnl_chain_set_data(c, attr, &data,
sizeof(uint8_t));
322 EXPORT_SYMBOL(nftnl_chain_set_str);
323 int nftnl_chain_set_str(
struct nftnl_chain *c, uint16_t attr,
const char *str)
325 return nftnl_chain_set_data(c, attr, str, strlen(str) + 1);
328 EXPORT_SYMBOL(nftnl_chain_set_array);
329 int nftnl_chain_set_array(
struct nftnl_chain *c, uint16_t attr,
332 return nftnl_chain_set_data(c, attr, data, 0);
335 EXPORT_SYMBOL(nftnl_chain_get_data);
336 const void *nftnl_chain_get_data(
const struct nftnl_chain *c, uint16_t attr,
339 if (!(c->flags & (1 << attr)))
343 case NFTNL_CHAIN_NAME:
344 *data_len = strlen(c->name) + 1;
346 case NFTNL_CHAIN_TABLE:
347 *data_len = strlen(c->table) + 1;
349 case NFTNL_CHAIN_HOOKNUM:
350 *data_len =
sizeof(uint32_t);
352 case NFTNL_CHAIN_PRIO:
353 *data_len =
sizeof(int32_t);
355 case NFTNL_CHAIN_POLICY:
356 *data_len =
sizeof(uint32_t);
358 case NFTNL_CHAIN_USE:
359 *data_len =
sizeof(uint32_t);
361 case NFTNL_CHAIN_BYTES:
362 *data_len =
sizeof(uint64_t);
364 case NFTNL_CHAIN_PACKETS:
365 *data_len =
sizeof(uint64_t);
367 case NFTNL_CHAIN_HANDLE:
368 *data_len =
sizeof(uint64_t);
370 case NFTNL_CHAIN_FAMILY:
371 *data_len =
sizeof(uint32_t);
373 case NFTNL_CHAIN_TYPE:
374 *data_len =
sizeof(uint32_t);
376 case NFTNL_CHAIN_DEV:
377 *data_len = strlen(c->dev) + 1;
379 case NFTNL_CHAIN_DEVICES:
381 return &c->dev_array[0];
382 case NFTNL_CHAIN_FLAGS:
383 *data_len =
sizeof(uint32_t);
384 return &c->chain_flags;
389 EXPORT_SYMBOL(nftnl_chain_get);
390 const void *nftnl_chain_get(
const struct nftnl_chain *c, uint16_t attr)
393 return nftnl_chain_get_data(c, attr, &data_len);
396 EXPORT_SYMBOL(nftnl_chain_get_str);
397 const char *nftnl_chain_get_str(
const struct nftnl_chain *c, uint16_t attr)
399 return nftnl_chain_get(c, attr);
402 EXPORT_SYMBOL(nftnl_chain_get_u32);
403 uint32_t nftnl_chain_get_u32(
const struct nftnl_chain *c, uint16_t attr)
406 const uint32_t *val = nftnl_chain_get_data(c, attr, &data_len);
408 nftnl_assert(val, attr, data_len ==
sizeof(uint32_t));
410 return val ? *val : 0;
413 EXPORT_SYMBOL(nftnl_chain_get_s32);
414 int32_t nftnl_chain_get_s32(
const struct nftnl_chain *c, uint16_t attr)
417 const int32_t *val = nftnl_chain_get_data(c, attr, &data_len);
419 nftnl_assert(val, attr, data_len ==
sizeof(int32_t));
421 return val ? *val : 0;
424 EXPORT_SYMBOL(nftnl_chain_get_u64);
425 uint64_t nftnl_chain_get_u64(
const struct nftnl_chain *c, uint16_t attr)
428 const uint64_t *val = nftnl_chain_get_data(c, attr, &data_len);
430 nftnl_assert(val, attr, data_len ==
sizeof(int64_t));
432 return val ? *val : 0;
435 EXPORT_SYMBOL(nftnl_chain_get_u8);
436 uint8_t nftnl_chain_get_u8(
const struct nftnl_chain *c, uint16_t attr)
439 const uint8_t *val = nftnl_chain_get_data(c, attr, &data_len);
441 nftnl_assert(val, attr, data_len ==
sizeof(int8_t));
443 return val ? *val : 0;
446 EXPORT_SYMBOL(nftnl_chain_get_array);
447 const char *
const *nftnl_chain_get_array(
const struct nftnl_chain *c, uint16_t attr)
450 const char *
const *val = nftnl_chain_get_data(c, attr, &data_len);
452 nftnl_assert(val, attr, attr == NFTNL_CHAIN_DEVICES);
457 EXPORT_SYMBOL(nftnl_chain_nlmsg_build_payload);
458 void nftnl_chain_nlmsg_build_payload(
struct nlmsghdr *nlh,
const struct nftnl_chain *c)
462 if (c->flags & (1 << NFTNL_CHAIN_TABLE))
463 mnl_attr_put_strz(nlh, NFTA_CHAIN_TABLE, c->table);
464 if (c->flags & (1 << NFTNL_CHAIN_NAME))
465 mnl_attr_put_strz(nlh, NFTA_CHAIN_NAME, c->name);
466 if ((c->flags & (1 << NFTNL_CHAIN_HOOKNUM)) &&
467 (c->flags & (1 << NFTNL_CHAIN_PRIO))) {
470 nest = mnl_attr_nest_start(nlh, NFTA_CHAIN_HOOK);
471 mnl_attr_put_u32(nlh, NFTA_HOOK_HOOKNUM, htonl(c->hooknum));
472 mnl_attr_put_u32(nlh, NFTA_HOOK_PRIORITY, htonl(c->prio));
473 if (c->flags & (1 << NFTNL_CHAIN_DEV))
474 mnl_attr_put_strz(nlh, NFTA_HOOK_DEV, c->dev);
475 else if (c->flags & (1 << NFTNL_CHAIN_DEVICES)) {
476 struct nlattr *nest_dev;
478 nest_dev = mnl_attr_nest_start(nlh, NFTA_HOOK_DEVS);
479 for (i = 0; i < c->dev_array_len; i++)
480 mnl_attr_put_strz(nlh, NFTA_DEVICE_NAME,
482 mnl_attr_nest_end(nlh, nest_dev);
484 mnl_attr_nest_end(nlh, nest);
486 if (c->flags & (1 << NFTNL_CHAIN_POLICY))
487 mnl_attr_put_u32(nlh, NFTA_CHAIN_POLICY, htonl(c->policy));
488 if (c->flags & (1 << NFTNL_CHAIN_USE))
489 mnl_attr_put_u32(nlh, NFTA_CHAIN_USE, htonl(c->use));
490 if ((c->flags & (1 << NFTNL_CHAIN_PACKETS)) &&
491 (c->flags & (1 << NFTNL_CHAIN_BYTES))) {
494 nest = mnl_attr_nest_start(nlh, NFTA_CHAIN_COUNTERS);
495 mnl_attr_put_u64(nlh, NFTA_COUNTER_PACKETS, be64toh(c->packets));
496 mnl_attr_put_u64(nlh, NFTA_COUNTER_BYTES, be64toh(c->bytes));
497 mnl_attr_nest_end(nlh, nest);
499 if (c->flags & (1 << NFTNL_CHAIN_HANDLE))
500 mnl_attr_put_u64(nlh, NFTA_CHAIN_HANDLE, be64toh(c->handle));
501 if (c->flags & (1 << NFTNL_CHAIN_TYPE))
502 mnl_attr_put_strz(nlh, NFTA_CHAIN_TYPE, c->type);
503 if (c->flags & (1 << NFTNL_CHAIN_FLAGS))
504 mnl_attr_put_u32(nlh, NFTA_CHAIN_FLAGS, htonl(c->chain_flags));
507 EXPORT_SYMBOL(nftnl_chain_rule_add);
508 void nftnl_chain_rule_add(
struct nftnl_rule *rule,
struct nftnl_chain *c)
510 list_add(&rule->head, &c->rule_list);
513 EXPORT_SYMBOL(nftnl_chain_rule_del);
514 void nftnl_chain_rule_del(
struct nftnl_rule *r)
519 EXPORT_SYMBOL(nftnl_chain_rule_add_tail);
520 void nftnl_chain_rule_add_tail(
struct nftnl_rule *rule,
struct nftnl_chain *c)
522 list_add_tail(&rule->head, &c->rule_list);
525 EXPORT_SYMBOL(nftnl_chain_rule_insert_at);
526 void nftnl_chain_rule_insert_at(
struct nftnl_rule *rule,
struct nftnl_rule *pos)
528 list_add_tail(&rule->head, &pos->head);
531 EXPORT_SYMBOL(nftnl_chain_rule_append_at);
532 void nftnl_chain_rule_append_at(
struct nftnl_rule *rule,
struct nftnl_rule *pos)
534 list_add(&rule->head, &pos->head);
537 static int nftnl_chain_parse_attr_cb(
const struct nlattr *attr,
void *data)
539 const struct nlattr **tb = data;
540 int type = mnl_attr_get_type(attr);
542 if (mnl_attr_type_valid(attr, NFTA_CHAIN_MAX) < 0)
546 case NFTA_CHAIN_NAME:
547 case NFTA_CHAIN_TABLE:
548 case NFTA_CHAIN_TYPE:
549 if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
552 case NFTA_CHAIN_HOOK:
553 case NFTA_CHAIN_COUNTERS:
554 if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0)
557 case NFTA_CHAIN_POLICY:
559 case NFTA_CHAIN_FLAGS:
560 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
563 case NFTA_CHAIN_HANDLE:
564 if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
573 static int nftnl_chain_parse_counters_cb(
const struct nlattr *attr,
void *data)
575 const struct nlattr **tb = data;
576 int type = mnl_attr_get_type(attr);
578 if (mnl_attr_type_valid(attr, NFTA_COUNTER_MAX) < 0)
582 case NFTA_COUNTER_BYTES:
583 case NFTA_COUNTER_PACKETS:
584 if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
593 static int nftnl_chain_parse_counters(
struct nlattr *attr,
struct nftnl_chain *c)
595 struct nlattr *tb[NFTA_COUNTER_MAX+1] = {};
597 if (mnl_attr_parse_nested(attr, nftnl_chain_parse_counters_cb, tb) < 0)
600 if (tb[NFTA_COUNTER_PACKETS]) {
601 c->packets = be64toh(mnl_attr_get_u64(tb[NFTA_COUNTER_PACKETS]));
602 c->flags |= (1 << NFTNL_CHAIN_PACKETS);
604 if (tb[NFTA_COUNTER_BYTES]) {
605 c->bytes = be64toh(mnl_attr_get_u64(tb[NFTA_COUNTER_BYTES]));
606 c->flags |= (1 << NFTNL_CHAIN_BYTES);
612 static int nftnl_chain_parse_hook_cb(
const struct nlattr *attr,
void *data)
614 const struct nlattr **tb = data;
615 int type = mnl_attr_get_type(attr);
617 if (mnl_attr_type_valid(attr, NFTA_HOOK_MAX) < 0)
621 case NFTA_HOOK_HOOKNUM:
622 case NFTA_HOOK_PRIORITY:
623 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
627 if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
636 static int nftnl_chain_parse_devs(
struct nlattr *nest,
struct nftnl_chain *c)
638 const char **dev_array, **tmp;
639 int len = 0, size = 8;
642 dev_array = calloc(8,
sizeof(
char *));
646 mnl_attr_for_each_nested(attr, nest) {
647 if (mnl_attr_get_type(attr) != NFTA_DEVICE_NAME)
649 dev_array[len++] = strdup(mnl_attr_get_str(attr));
651 tmp = realloc(dev_array, size * 2 *
sizeof(
char *));
656 memset(&tmp[len], 0, (size - len) *
sizeof(
char *));
661 c->dev_array = dev_array;
662 c->dev_array_len = len;
667 xfree(dev_array[len]);
672 static int nftnl_chain_parse_hook(
struct nlattr *attr,
struct nftnl_chain *c)
674 struct nlattr *tb[NFTA_HOOK_MAX+1] = {};
677 if (mnl_attr_parse_nested(attr, nftnl_chain_parse_hook_cb, tb) < 0)
680 if (tb[NFTA_HOOK_HOOKNUM]) {
681 c->hooknum = ntohl(mnl_attr_get_u32(tb[NFTA_HOOK_HOOKNUM]));
682 c->flags |= (1 << NFTNL_CHAIN_HOOKNUM);
684 if (tb[NFTA_HOOK_PRIORITY]) {
685 c->prio = ntohl(mnl_attr_get_u32(tb[NFTA_HOOK_PRIORITY]));
686 c->flags |= (1 << NFTNL_CHAIN_PRIO);
688 if (tb[NFTA_HOOK_DEV]) {
689 c->dev = strdup(mnl_attr_get_str(tb[NFTA_HOOK_DEV]));
692 c->flags |= (1 << NFTNL_CHAIN_DEV);
694 if (tb[NFTA_HOOK_DEVS]) {
695 ret = nftnl_chain_parse_devs(tb[NFTA_HOOK_DEVS], c);
698 c->flags |= (1 << NFTNL_CHAIN_DEVICES);
704 EXPORT_SYMBOL(nftnl_chain_nlmsg_parse);
705 int nftnl_chain_nlmsg_parse(
const struct nlmsghdr *nlh,
struct nftnl_chain *c)
707 struct nlattr *tb[NFTA_CHAIN_MAX+1] = {};
708 struct nfgenmsg *nfg = mnl_nlmsg_get_payload(nlh);
711 if (mnl_attr_parse(nlh,
sizeof(*nfg), nftnl_chain_parse_attr_cb, tb) < 0)
714 if (tb[NFTA_CHAIN_NAME]) {
715 if (c->flags & (1 << NFTNL_CHAIN_NAME))
717 c->name = strdup(mnl_attr_get_str(tb[NFTA_CHAIN_NAME]));
720 c->flags |= (1 << NFTNL_CHAIN_NAME);
722 if (tb[NFTA_CHAIN_TABLE]) {
723 if (c->flags & (1 << NFTNL_CHAIN_TABLE))
725 c->table = strdup(mnl_attr_get_str(tb[NFTA_CHAIN_TABLE]));
728 c->flags |= (1 << NFTNL_CHAIN_TABLE);
730 if (tb[NFTA_CHAIN_HOOK]) {
731 ret = nftnl_chain_parse_hook(tb[NFTA_CHAIN_HOOK], c);
735 if (tb[NFTA_CHAIN_POLICY]) {
736 c->policy = ntohl(mnl_attr_get_u32(tb[NFTA_CHAIN_POLICY]));
737 c->flags |= (1 << NFTNL_CHAIN_POLICY);
739 if (tb[NFTA_CHAIN_USE]) {
740 c->use = ntohl(mnl_attr_get_u32(tb[NFTA_CHAIN_USE]));
741 c->flags |= (1 << NFTNL_CHAIN_USE);
743 if (tb[NFTA_CHAIN_COUNTERS]) {
744 ret = nftnl_chain_parse_counters(tb[NFTA_CHAIN_COUNTERS], c);
748 if (tb[NFTA_CHAIN_HANDLE]) {
749 c->handle = be64toh(mnl_attr_get_u64(tb[NFTA_CHAIN_HANDLE]));
750 c->flags |= (1 << NFTNL_CHAIN_HANDLE);
752 if (tb[NFTA_CHAIN_TYPE]) {
753 if (c->flags & (1 << NFTNL_CHAIN_TYPE))
755 c->type = strdup(mnl_attr_get_str(tb[NFTA_CHAIN_TYPE]));
758 c->flags |= (1 << NFTNL_CHAIN_TYPE);
760 if (tb[NFTA_CHAIN_FLAGS]) {
761 c->chain_flags = ntohl(mnl_attr_get_u32(tb[NFTA_CHAIN_FLAGS]));
762 c->flags |= (1 << NFTNL_CHAIN_FLAGS);
765 c->family = nfg->nfgen_family;
766 c->flags |= (1 << NFTNL_CHAIN_FAMILY);
771 static inline int nftnl_str2hooknum(
int family,
const char *hook)
775 for (hooknum = 0; hooknum < NF_INET_NUMHOOKS; hooknum++) {
776 if (strcmp(hook, nftnl_hooknum2str(family, hooknum)) == 0)
782 static int nftnl_chain_snprintf_default(
char *buf,
size_t size,
785 int ret, remain = size, offset = 0, i;
787 ret = snprintf(buf, remain,
"%s %s %s use %u",
788 nftnl_family2str(c->family), c->table, c->name, c->use);
789 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
791 if (c->flags & (1 << NFTNL_CHAIN_HOOKNUM)) {
792 ret = snprintf(buf + offset, remain,
" type %s hook %s prio %d",
793 c->type, nftnl_hooknum2str(c->family, c->hooknum),
795 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
797 if (c->flags & (1 << NFTNL_CHAIN_POLICY)) {
798 ret = snprintf(buf + offset, remain,
" policy %s",
799 nftnl_verdict2str(c->policy));
800 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
803 ret = snprintf(buf + offset, remain,
804 " packets %"PRIu64
" bytes %"PRIu64
"",
805 c->packets, c->bytes);
806 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
808 if (c->flags & (1 << NFTNL_CHAIN_DEV)) {
809 ret = snprintf(buf + offset, remain,
" dev %s ",
811 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
813 if (c->flags & (1 << NFTNL_CHAIN_DEVICES)) {
814 ret = snprintf(buf + offset, remain,
" dev { ");
815 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
817 for (i = 0; i < c->dev_array_len; i++) {
818 ret = snprintf(buf + offset, remain,
" %s ",
820 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
822 ret = snprintf(buf + offset, remain,
" } ");
823 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
825 if (c->flags & (1 << NFTNL_CHAIN_FLAGS)) {
826 ret = snprintf(buf + offset, remain,
" flags %x",
828 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
835 static int nftnl_chain_cmd_snprintf(
char *buf,
size_t size,
837 uint32_t type, uint32_t flags)
839 int ret, remain = size, offset = 0;
842 case NFTNL_OUTPUT_DEFAULT:
843 ret = nftnl_chain_snprintf_default(buf + offset, remain, c);
844 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
846 case NFTNL_OUTPUT_XML:
847 case NFTNL_OUTPUT_JSON:
855 EXPORT_SYMBOL(nftnl_chain_snprintf);
856 int nftnl_chain_snprintf(
char *buf,
size_t size,
const struct nftnl_chain *c,
857 uint32_t type, uint32_t flags)
862 return nftnl_chain_cmd_snprintf(buf, size, c, nftnl_flag2cmd(flags),
866 static int nftnl_chain_do_snprintf(
char *buf,
size_t size,
const void *c,
867 uint32_t cmd, uint32_t type, uint32_t flags)
869 return nftnl_chain_snprintf(buf, size, c, type, flags);
872 EXPORT_SYMBOL(nftnl_chain_fprintf);
873 int nftnl_chain_fprintf(FILE *fp,
const struct nftnl_chain *c, uint32_t type,
876 return nftnl_fprintf(fp, c, NFTNL_CMD_UNSPEC, type, flags,
877 nftnl_chain_do_snprintf);
880 EXPORT_SYMBOL(nftnl_rule_foreach);
882 int (*cb)(
struct nftnl_rule *r,
void *data),
885 struct nftnl_rule *cur, *tmp;
888 list_for_each_entry_safe(cur, tmp, &c->rule_list, head) {
896 EXPORT_SYMBOL(nftnl_rule_lookup_byindex);
898 nftnl_rule_lookup_byindex(
struct nftnl_chain *c, uint32_t index)
900 struct nftnl_rule *r;
902 list_for_each_entry(r, &c->rule_list, head) {
912 struct nftnl_rule *cur;
915 static void nftnl_rule_iter_init(
const struct nftnl_chain *c,
919 if (list_empty(&c->rule_list))
922 iter->cur = list_entry(c->rule_list.next,
struct nftnl_rule,
926 EXPORT_SYMBOL(nftnl_rule_iter_create);
935 nftnl_rule_iter_init(c, iter);
940 EXPORT_SYMBOL(nftnl_rule_iter_next);
943 struct nftnl_rule *rule = iter->cur;
949 iter->cur = list_entry(iter->cur->head.next,
struct nftnl_rule, head);
950 if (&iter->cur->head == iter->c->rule_list.next)
956 EXPORT_SYMBOL(nftnl_rule_iter_destroy);
962 #define CHAIN_NAME_HSIZE 512
966 struct list_head list;
967 struct hlist_head name_hash[CHAIN_NAME_HSIZE];
970 EXPORT_SYMBOL(nftnl_chain_list_alloc);
980 INIT_LIST_HEAD(&list->list);
981 for (i = 0; i < CHAIN_NAME_HSIZE; i++)
982 INIT_HLIST_HEAD(&list->name_hash[i]);
987 EXPORT_SYMBOL(nftnl_chain_list_free);
992 list_for_each_entry_safe(r, tmp, &list->list, head) {
994 hlist_del(&r->hnode);
1000 EXPORT_SYMBOL(nftnl_chain_list_is_empty);
1003 return list_empty(&list->list);
1006 static uint32_t djb_hash(
const char *key)
1008 uint32_t i, hash = 5381;
1010 for (i = 0; i < strlen(key); i++)
1011 hash = ((hash << 5) + hash) + key[i];
1016 EXPORT_SYMBOL(nftnl_chain_list_add);
1019 int key = djb_hash(r->name) % CHAIN_NAME_HSIZE;
1021 hlist_add_head(&r->hnode, &list->name_hash[key]);
1022 list_add(&r->head, &list->list);
1025 EXPORT_SYMBOL(nftnl_chain_list_add_tail);
1028 int key = djb_hash(r->name) % CHAIN_NAME_HSIZE;
1030 hlist_add_head(&r->hnode, &list->name_hash[key]);
1031 list_add_tail(&r->head, &list->list);
1034 EXPORT_SYMBOL(nftnl_chain_list_del);
1038 hlist_del(&r->hnode);
1041 EXPORT_SYMBOL(nftnl_chain_list_foreach);
1049 list_for_each_entry_safe(cur, tmp, &chain_list->list, head) {
1050 ret = cb(cur, data);
1057 EXPORT_SYMBOL(nftnl_chain_list_lookup_byname);
1062 int key = djb_hash(chain) % CHAIN_NAME_HSIZE;
1064 struct hlist_node *n;
1066 hlist_for_each_entry(c, n, &chain_list->name_hash[key], hnode) {
1067 if (!strcmp(chain, c->name))
1078 EXPORT_SYMBOL(nftnl_chain_list_iter_create);
1089 if (nftnl_chain_list_is_empty(l))
1092 iter->cur = list_entry(l->list.next,
struct nftnl_chain, head);
1097 EXPORT_SYMBOL(nftnl_chain_list_iter_next);
1106 iter->cur = list_entry(iter->cur->head.next,
struct nftnl_chain, head);
1107 if (&iter->cur->head == iter->list->list.next)
1113 EXPORT_SYMBOL(nftnl_chain_list_iter_destroy);