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;
59 struct list_head rule_list;
62static const char *nftnl_hooknum2str(
int family,
int hooknum)
70 case NF_INET_PRE_ROUTING:
72 case NF_INET_LOCAL_IN:
76 case NF_INET_LOCAL_OUT:
78 case NF_INET_POST_ROUTING:
94 case NF_NETDEV_INGRESS:
102EXPORT_SYMBOL(nftnl_chain_alloc);
111 INIT_LIST_HEAD(&c->rule_list);
116EXPORT_SYMBOL(nftnl_chain_free);
119 struct nftnl_rule *r, *tmp;
122 list_for_each_entry_safe(r, tmp, &c->rule_list, head)
125 if (c->flags & (1 << NFTNL_CHAIN_NAME))
127 if (c->flags & (1 << NFTNL_CHAIN_TABLE))
129 if (c->flags & (1 << NFTNL_CHAIN_TYPE))
131 if (c->flags & (1 << NFTNL_CHAIN_DEV))
133 if (c->flags & (1 << NFTNL_CHAIN_USERDATA))
135 if (c->flags & (1 << NFTNL_CHAIN_DEVICES)) {
136 for (i = 0; i < c->dev_array_len; i++)
137 xfree(c->dev_array[i]);
144EXPORT_SYMBOL(nftnl_chain_is_set);
145bool nftnl_chain_is_set(
const struct nftnl_chain *c, uint16_t attr)
147 return c->flags & (1 << attr);
150EXPORT_SYMBOL(nftnl_chain_unset);
151void nftnl_chain_unset(
struct nftnl_chain *c, uint16_t attr)
155 if (!(c->flags & (1 << attr)))
159 case NFTNL_CHAIN_NAME:
162 case NFTNL_CHAIN_TABLE:
165 case NFTNL_CHAIN_USE:
167 case NFTNL_CHAIN_TYPE:
170 case NFTNL_CHAIN_HOOKNUM:
171 case NFTNL_CHAIN_PRIO:
172 case NFTNL_CHAIN_POLICY:
173 case NFTNL_CHAIN_BYTES:
174 case NFTNL_CHAIN_PACKETS:
175 case NFTNL_CHAIN_HANDLE:
176 case NFTNL_CHAIN_FAMILY:
177 case NFTNL_CHAIN_FLAGS:
180 case NFTNL_CHAIN_DEV:
183 case NFTNL_CHAIN_DEVICES:
184 for (i = 0; i < c->dev_array_len; i++)
185 xfree(c->dev_array[i]);
192 c->flags &= ~(1 << attr);
195static uint32_t nftnl_chain_validate[NFTNL_CHAIN_MAX + 1] = {
196 [NFTNL_CHAIN_HOOKNUM] =
sizeof(uint32_t),
197 [NFTNL_CHAIN_PRIO] =
sizeof(int32_t),
198 [NFTNL_CHAIN_POLICY] =
sizeof(uint32_t),
199 [NFTNL_CHAIN_BYTES] =
sizeof(uint64_t),
200 [NFTNL_CHAIN_PACKETS] =
sizeof(uint64_t),
201 [NFTNL_CHAIN_HANDLE] =
sizeof(uint64_t),
202 [NFTNL_CHAIN_FAMILY] =
sizeof(uint32_t),
203 [NFTNL_CHAIN_FLAGS] =
sizeof(uint32_t),
204 [NFTNL_CHAIN_ID] =
sizeof(uint32_t),
207EXPORT_SYMBOL(nftnl_chain_set_data);
208int nftnl_chain_set_data(
struct nftnl_chain *c, uint16_t attr,
209 const void *data, uint32_t data_len)
211 const char **dev_array;
214 nftnl_assert_attr_exists(attr, NFTNL_CHAIN_MAX);
215 nftnl_assert_validate(data, nftnl_chain_validate, attr, data_len);
218 case NFTNL_CHAIN_NAME:
219 if (c->flags & (1 << NFTNL_CHAIN_NAME))
222 c->name = strdup(data);
226 case NFTNL_CHAIN_TABLE:
227 if (c->flags & (1 << NFTNL_CHAIN_TABLE))
230 c->table = strdup(data);
234 case NFTNL_CHAIN_HOOKNUM:
235 memcpy(&c->hooknum, data,
sizeof(c->hooknum));
237 case NFTNL_CHAIN_PRIO:
238 memcpy(&c->prio, data,
sizeof(c->prio));
240 case NFTNL_CHAIN_POLICY:
241 memcpy(&c->policy, data,
sizeof(c->policy));
243 case NFTNL_CHAIN_USE:
244 memcpy(&c->use, data,
sizeof(c->use));
246 case NFTNL_CHAIN_BYTES:
247 memcpy(&c->bytes, data,
sizeof(c->bytes));
249 case NFTNL_CHAIN_PACKETS:
250 memcpy(&c->packets, data,
sizeof(c->packets));
252 case NFTNL_CHAIN_HANDLE:
253 memcpy(&c->handle, data,
sizeof(c->handle));
255 case NFTNL_CHAIN_FAMILY:
256 memcpy(&c->family, data,
sizeof(c->family));
258 case NFTNL_CHAIN_TYPE:
259 if (c->flags & (1 << NFTNL_CHAIN_TYPE))
262 c->type = strdup(data);
266 case NFTNL_CHAIN_DEV:
267 if (c->flags & (1 << NFTNL_CHAIN_DEV))
270 c->dev = strdup(data);
274 case NFTNL_CHAIN_DEVICES:
275 dev_array = (
const char **)data;
276 while (dev_array[len] != NULL)
279 if (c->flags & (1 << NFTNL_CHAIN_DEVICES)) {
280 for (i = 0; i < c->dev_array_len; i++)
281 xfree(c->dev_array[i]);
285 c->dev_array = calloc(len + 1,
sizeof(
char *));
289 for (i = 0; i < len; i++)
290 c->dev_array[i] = strdup(dev_array[i]);
292 c->dev_array_len = len;
294 case NFTNL_CHAIN_FLAGS:
295 memcpy(&c->chain_flags, data,
sizeof(c->chain_flags));
298 memcpy(&c->chain_id, data,
sizeof(c->chain_id));
300 case NFTNL_CHAIN_USERDATA:
301 if (c->flags & (1 << NFTNL_CHAIN_USERDATA))
304 c->user.data = malloc(data_len);
307 memcpy(c->user.data, data, data_len);
308 c->user.len = data_len;
311 c->flags |= (1 << attr);
315void nftnl_chain_set(
struct nftnl_chain *c, uint16_t attr,
const void *data) __visible;
316void nftnl_chain_set(
struct nftnl_chain *c, uint16_t attr,
const void *data)
318 nftnl_chain_set_data(c, attr, data, nftnl_chain_validate[attr]);
321EXPORT_SYMBOL(nftnl_chain_set_u32);
322void nftnl_chain_set_u32(
struct nftnl_chain *c, uint16_t attr, uint32_t data)
324 nftnl_chain_set_data(c, attr, &data,
sizeof(uint32_t));
327EXPORT_SYMBOL(nftnl_chain_set_s32);
328void nftnl_chain_set_s32(
struct nftnl_chain *c, uint16_t attr, int32_t data)
330 nftnl_chain_set_data(c, attr, &data,
sizeof(int32_t));
333EXPORT_SYMBOL(nftnl_chain_set_u64);
334void nftnl_chain_set_u64(
struct nftnl_chain *c, uint16_t attr, uint64_t data)
336 nftnl_chain_set_data(c, attr, &data,
sizeof(uint64_t));
339EXPORT_SYMBOL(nftnl_chain_set_u8);
340void nftnl_chain_set_u8(
struct nftnl_chain *c, uint16_t attr, uint8_t data)
342 nftnl_chain_set_data(c, attr, &data,
sizeof(uint8_t));
345EXPORT_SYMBOL(nftnl_chain_set_str);
346int nftnl_chain_set_str(
struct nftnl_chain *c, uint16_t attr,
const char *str)
348 return nftnl_chain_set_data(c, attr, str, strlen(str) + 1);
351EXPORT_SYMBOL(nftnl_chain_set_array);
352int nftnl_chain_set_array(
struct nftnl_chain *c, uint16_t attr,
355 return nftnl_chain_set_data(c, attr, data, 0);
358EXPORT_SYMBOL(nftnl_chain_get_data);
359const void *nftnl_chain_get_data(
const struct nftnl_chain *c, uint16_t attr,
362 if (!(c->flags & (1 << attr)))
366 case NFTNL_CHAIN_NAME:
367 *data_len = strlen(c->name) + 1;
369 case NFTNL_CHAIN_TABLE:
370 *data_len = strlen(c->table) + 1;
372 case NFTNL_CHAIN_HOOKNUM:
373 *data_len =
sizeof(uint32_t);
375 case NFTNL_CHAIN_PRIO:
376 *data_len =
sizeof(int32_t);
378 case NFTNL_CHAIN_POLICY:
379 *data_len =
sizeof(uint32_t);
381 case NFTNL_CHAIN_USE:
382 *data_len =
sizeof(uint32_t);
384 case NFTNL_CHAIN_BYTES:
385 *data_len =
sizeof(uint64_t);
387 case NFTNL_CHAIN_PACKETS:
388 *data_len =
sizeof(uint64_t);
390 case NFTNL_CHAIN_HANDLE:
391 *data_len =
sizeof(uint64_t);
393 case NFTNL_CHAIN_FAMILY:
394 *data_len =
sizeof(uint32_t);
396 case NFTNL_CHAIN_TYPE:
397 *data_len =
sizeof(uint32_t);
399 case NFTNL_CHAIN_DEV:
400 *data_len = strlen(c->dev) + 1;
402 case NFTNL_CHAIN_DEVICES:
404 return &c->dev_array[0];
405 case NFTNL_CHAIN_FLAGS:
406 *data_len =
sizeof(uint32_t);
407 return &c->chain_flags;
409 *data_len =
sizeof(uint32_t);
411 case NFTNL_CHAIN_USERDATA:
412 *data_len = c->user.len;
418EXPORT_SYMBOL(nftnl_chain_get);
419const void *nftnl_chain_get(
const struct nftnl_chain *c, uint16_t attr)
422 return nftnl_chain_get_data(c, attr, &data_len);
425EXPORT_SYMBOL(nftnl_chain_get_str);
426const char *nftnl_chain_get_str(
const struct nftnl_chain *c, uint16_t attr)
428 return nftnl_chain_get(c, attr);
431EXPORT_SYMBOL(nftnl_chain_get_u32);
432uint32_t nftnl_chain_get_u32(
const struct nftnl_chain *c, uint16_t attr)
435 const uint32_t *val = nftnl_chain_get_data(c, attr, &data_len);
437 nftnl_assert(val, attr, data_len ==
sizeof(uint32_t));
439 return val ? *val : 0;
442EXPORT_SYMBOL(nftnl_chain_get_s32);
443int32_t nftnl_chain_get_s32(
const struct nftnl_chain *c, uint16_t attr)
446 const int32_t *val = nftnl_chain_get_data(c, attr, &data_len);
448 nftnl_assert(val, attr, data_len ==
sizeof(int32_t));
450 return val ? *val : 0;
453EXPORT_SYMBOL(nftnl_chain_get_u64);
454uint64_t nftnl_chain_get_u64(
const struct nftnl_chain *c, uint16_t attr)
457 const uint64_t *val = nftnl_chain_get_data(c, attr, &data_len);
459 nftnl_assert(val, attr, data_len ==
sizeof(int64_t));
461 return val ? *val : 0;
464EXPORT_SYMBOL(nftnl_chain_get_u8);
465uint8_t nftnl_chain_get_u8(
const struct nftnl_chain *c, uint16_t attr)
468 const uint8_t *val = nftnl_chain_get_data(c, attr, &data_len);
470 nftnl_assert(val, attr, data_len ==
sizeof(int8_t));
472 return val ? *val : 0;
475EXPORT_SYMBOL(nftnl_chain_get_array);
476const char *
const *nftnl_chain_get_array(
const struct nftnl_chain *c, uint16_t attr)
479 const char *
const *val = nftnl_chain_get_data(c, attr, &data_len);
481 nftnl_assert(val, attr, attr == NFTNL_CHAIN_DEVICES);
486EXPORT_SYMBOL(nftnl_chain_nlmsg_build_payload);
487void nftnl_chain_nlmsg_build_payload(
struct nlmsghdr *nlh,
const struct nftnl_chain *c)
489 struct nlattr *nest = NULL;
492 if (c->flags & (1 << NFTNL_CHAIN_TABLE))
493 mnl_attr_put_strz(nlh, NFTA_CHAIN_TABLE, c->table);
494 if (c->flags & (1 << NFTNL_CHAIN_NAME))
495 mnl_attr_put_strz(nlh, NFTA_CHAIN_NAME, c->name);
497 if ((c->flags & (1 << NFTNL_CHAIN_HOOKNUM)) ||
498 (c->flags & (1 << NFTNL_CHAIN_PRIO)) ||
499 (c->flags & (1 << NFTNL_CHAIN_DEV)) ||
500 (c->flags & (1 << NFTNL_CHAIN_DEVICES)))
501 nest = mnl_attr_nest_start(nlh, NFTA_CHAIN_HOOK);
503 if ((c->flags & (1 << NFTNL_CHAIN_HOOKNUM)))
504 mnl_attr_put_u32(nlh, NFTA_HOOK_HOOKNUM, htonl(c->hooknum));
505 if ((c->flags & (1 << NFTNL_CHAIN_PRIO)))
506 mnl_attr_put_u32(nlh, NFTA_HOOK_PRIORITY, htonl(c->prio));
508 if (c->flags & (1 << NFTNL_CHAIN_DEV))
509 mnl_attr_put_strz(nlh, NFTA_HOOK_DEV, c->dev);
510 else if (c->flags & (1 << NFTNL_CHAIN_DEVICES)) {
511 struct nlattr *nest_dev;
513 nest_dev = mnl_attr_nest_start(nlh, NFTA_HOOK_DEVS);
514 for (i = 0; i < c->dev_array_len; i++)
515 mnl_attr_put_strz(nlh, NFTA_DEVICE_NAME,
517 mnl_attr_nest_end(nlh, nest_dev);
520 if ((c->flags & (1 << NFTNL_CHAIN_HOOKNUM)) ||
521 (c->flags & (1 << NFTNL_CHAIN_PRIO)) ||
522 (c->flags & (1 << NFTNL_CHAIN_DEV)) ||
523 (c->flags & (1 << NFTNL_CHAIN_DEVICES)))
524 mnl_attr_nest_end(nlh, nest);
526 if (c->flags & (1 << NFTNL_CHAIN_POLICY))
527 mnl_attr_put_u32(nlh, NFTA_CHAIN_POLICY, htonl(c->policy));
528 if (c->flags & (1 << NFTNL_CHAIN_USE))
529 mnl_attr_put_u32(nlh, NFTA_CHAIN_USE, htonl(c->use));
530 if ((c->flags & (1 << NFTNL_CHAIN_PACKETS)) &&
531 (c->flags & (1 << NFTNL_CHAIN_BYTES))) {
532 nest = mnl_attr_nest_start(nlh, NFTA_CHAIN_COUNTERS);
533 mnl_attr_put_u64(nlh, NFTA_COUNTER_PACKETS, be64toh(c->packets));
534 mnl_attr_put_u64(nlh, NFTA_COUNTER_BYTES, be64toh(c->bytes));
535 mnl_attr_nest_end(nlh, nest);
537 if (c->flags & (1 << NFTNL_CHAIN_HANDLE))
538 mnl_attr_put_u64(nlh, NFTA_CHAIN_HANDLE, be64toh(c->handle));
539 if (c->flags & (1 << NFTNL_CHAIN_TYPE))
540 mnl_attr_put_strz(nlh, NFTA_CHAIN_TYPE, c->type);
541 if (c->flags & (1 << NFTNL_CHAIN_FLAGS))
542 mnl_attr_put_u32(nlh, NFTA_CHAIN_FLAGS, htonl(c->chain_flags));
543 if (c->flags & (1 << NFTNL_CHAIN_ID))
544 mnl_attr_put_u32(nlh, NFTA_CHAIN_ID, htonl(c->chain_id));
545 if (c->flags & (1 << NFTNL_CHAIN_USERDATA))
546 mnl_attr_put(nlh, NFTA_CHAIN_USERDATA, c->user.len, c->user.data);
549EXPORT_SYMBOL(nftnl_chain_rule_add);
550void nftnl_chain_rule_add(
struct nftnl_rule *rule,
struct nftnl_chain *c)
552 list_add(&rule->head, &c->rule_list);
555EXPORT_SYMBOL(nftnl_chain_rule_del);
556void nftnl_chain_rule_del(
struct nftnl_rule *r)
561EXPORT_SYMBOL(nftnl_chain_rule_add_tail);
562void nftnl_chain_rule_add_tail(
struct nftnl_rule *rule,
struct nftnl_chain *c)
564 list_add_tail(&rule->head, &c->rule_list);
567EXPORT_SYMBOL(nftnl_chain_rule_insert_at);
568void nftnl_chain_rule_insert_at(
struct nftnl_rule *rule,
struct nftnl_rule *pos)
570 list_add_tail(&rule->head, &pos->head);
573EXPORT_SYMBOL(nftnl_chain_rule_append_at);
574void nftnl_chain_rule_append_at(
struct nftnl_rule *rule,
struct nftnl_rule *pos)
576 list_add(&rule->head, &pos->head);
579static int nftnl_chain_parse_attr_cb(
const struct nlattr *attr,
void *data)
581 const struct nlattr **tb = data;
582 int type = mnl_attr_get_type(attr);
584 if (mnl_attr_type_valid(attr, NFTA_CHAIN_MAX) < 0)
588 case NFTA_CHAIN_NAME:
589 case NFTA_CHAIN_TABLE:
590 case NFTA_CHAIN_TYPE:
591 if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
594 case NFTA_CHAIN_HOOK:
595 case NFTA_CHAIN_COUNTERS:
596 if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0)
599 case NFTA_CHAIN_POLICY:
601 case NFTA_CHAIN_FLAGS:
603 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
606 case NFTA_CHAIN_HANDLE:
607 if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
610 case NFTA_CHAIN_USERDATA:
611 if (mnl_attr_validate(attr, MNL_TYPE_BINARY) < 0)
620static int nftnl_chain_parse_counters_cb(
const struct nlattr *attr,
void *data)
622 const struct nlattr **tb = data;
623 int type = mnl_attr_get_type(attr);
625 if (mnl_attr_type_valid(attr, NFTA_COUNTER_MAX) < 0)
629 case NFTA_COUNTER_BYTES:
630 case NFTA_COUNTER_PACKETS:
631 if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
640static int nftnl_chain_parse_counters(
struct nlattr *attr,
struct nftnl_chain *c)
642 struct nlattr *tb[NFTA_COUNTER_MAX+1] = {};
644 if (mnl_attr_parse_nested(attr, nftnl_chain_parse_counters_cb, tb) < 0)
647 if (tb[NFTA_COUNTER_PACKETS]) {
648 c->packets = be64toh(mnl_attr_get_u64(tb[NFTA_COUNTER_PACKETS]));
649 c->flags |= (1 << NFTNL_CHAIN_PACKETS);
651 if (tb[NFTA_COUNTER_BYTES]) {
652 c->bytes = be64toh(mnl_attr_get_u64(tb[NFTA_COUNTER_BYTES]));
653 c->flags |= (1 << NFTNL_CHAIN_BYTES);
659static int nftnl_chain_parse_hook_cb(
const struct nlattr *attr,
void *data)
661 const struct nlattr **tb = data;
662 int type = mnl_attr_get_type(attr);
664 if (mnl_attr_type_valid(attr, NFTA_HOOK_MAX) < 0)
668 case NFTA_HOOK_HOOKNUM:
669 case NFTA_HOOK_PRIORITY:
670 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
674 if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
683static int nftnl_chain_parse_devs(
struct nlattr *nest,
struct nftnl_chain *c)
685 const char **dev_array, **tmp;
686 int len = 0, size = 8;
689 dev_array = calloc(8,
sizeof(
char *));
693 mnl_attr_for_each_nested(attr, nest) {
694 if (mnl_attr_get_type(attr) != NFTA_DEVICE_NAME)
696 dev_array[len++] = strdup(mnl_attr_get_str(attr));
698 tmp = realloc(dev_array, size * 2 *
sizeof(
char *));
703 memset(&tmp[len], 0, (size - len) *
sizeof(
char *));
708 c->dev_array = dev_array;
709 c->dev_array_len = len;
714 xfree(dev_array[len]);
719static int nftnl_chain_parse_hook(
struct nlattr *attr,
struct nftnl_chain *c)
721 struct nlattr *tb[NFTA_HOOK_MAX+1] = {};
724 if (mnl_attr_parse_nested(attr, nftnl_chain_parse_hook_cb, tb) < 0)
727 if (tb[NFTA_HOOK_HOOKNUM]) {
728 c->hooknum = ntohl(mnl_attr_get_u32(tb[NFTA_HOOK_HOOKNUM]));
729 c->flags |= (1 << NFTNL_CHAIN_HOOKNUM);
731 if (tb[NFTA_HOOK_PRIORITY]) {
732 c->prio = ntohl(mnl_attr_get_u32(tb[NFTA_HOOK_PRIORITY]));
733 c->flags |= (1 << NFTNL_CHAIN_PRIO);
735 if (tb[NFTA_HOOK_DEV]) {
736 c->dev = strdup(mnl_attr_get_str(tb[NFTA_HOOK_DEV]));
739 c->flags |= (1 << NFTNL_CHAIN_DEV);
741 if (tb[NFTA_HOOK_DEVS]) {
742 ret = nftnl_chain_parse_devs(tb[NFTA_HOOK_DEVS], c);
745 c->flags |= (1 << NFTNL_CHAIN_DEVICES);
751EXPORT_SYMBOL(nftnl_chain_nlmsg_parse);
752int nftnl_chain_nlmsg_parse(
const struct nlmsghdr *nlh,
struct nftnl_chain *c)
754 struct nlattr *tb[NFTA_CHAIN_MAX+1] = {};
755 struct nfgenmsg *nfg = mnl_nlmsg_get_payload(nlh);
758 if (mnl_attr_parse(nlh,
sizeof(*nfg), nftnl_chain_parse_attr_cb, tb) < 0)
761 if (tb[NFTA_CHAIN_NAME]) {
762 if (c->flags & (1 << NFTNL_CHAIN_NAME))
764 c->name = strdup(mnl_attr_get_str(tb[NFTA_CHAIN_NAME]));
767 c->flags |= (1 << NFTNL_CHAIN_NAME);
769 if (tb[NFTA_CHAIN_TABLE]) {
770 if (c->flags & (1 << NFTNL_CHAIN_TABLE))
772 c->table = strdup(mnl_attr_get_str(tb[NFTA_CHAIN_TABLE]));
775 c->flags |= (1 << NFTNL_CHAIN_TABLE);
777 if (tb[NFTA_CHAIN_HOOK]) {
778 ret = nftnl_chain_parse_hook(tb[NFTA_CHAIN_HOOK], c);
782 if (tb[NFTA_CHAIN_POLICY]) {
783 c->policy = ntohl(mnl_attr_get_u32(tb[NFTA_CHAIN_POLICY]));
784 c->flags |= (1 << NFTNL_CHAIN_POLICY);
786 if (tb[NFTA_CHAIN_USE]) {
787 c->use = ntohl(mnl_attr_get_u32(tb[NFTA_CHAIN_USE]));
788 c->flags |= (1 << NFTNL_CHAIN_USE);
790 if (tb[NFTA_CHAIN_COUNTERS]) {
791 ret = nftnl_chain_parse_counters(tb[NFTA_CHAIN_COUNTERS], c);
795 if (tb[NFTA_CHAIN_HANDLE]) {
796 c->handle = be64toh(mnl_attr_get_u64(tb[NFTA_CHAIN_HANDLE]));
797 c->flags |= (1 << NFTNL_CHAIN_HANDLE);
799 if (tb[NFTA_CHAIN_TYPE]) {
800 if (c->flags & (1 << NFTNL_CHAIN_TYPE))
802 c->type = strdup(mnl_attr_get_str(tb[NFTA_CHAIN_TYPE]));
805 c->flags |= (1 << NFTNL_CHAIN_TYPE);
807 if (tb[NFTA_CHAIN_FLAGS]) {
808 c->chain_flags = ntohl(mnl_attr_get_u32(tb[NFTA_CHAIN_FLAGS]));
809 c->flags |= (1 << NFTNL_CHAIN_FLAGS);
811 if (tb[NFTA_CHAIN_ID]) {
812 c->chain_id = ntohl(mnl_attr_get_u32(tb[NFTA_CHAIN_ID]));
813 c->flags |= (1 << NFTNL_CHAIN_ID);
815 if (tb[NFTA_CHAIN_USERDATA]) {
816 nftnl_chain_set_data(c, NFTNL_CHAIN_USERDATA,
817 mnl_attr_get_payload(tb[NFTA_CHAIN_USERDATA]),
818 mnl_attr_get_payload_len(tb[NFTA_CHAIN_USERDATA]));
821 c->family = nfg->nfgen_family;
822 c->flags |= (1 << NFTNL_CHAIN_FAMILY);
827static inline int nftnl_str2hooknum(
int family,
const char *hook)
831 for (hooknum = 0; hooknum < NF_INET_NUMHOOKS; hooknum++) {
832 if (strcmp(hook, nftnl_hooknum2str(family, hooknum)) == 0)
838static int nftnl_chain_snprintf_default(
char *buf,
size_t remain,
841 int ret, offset = 0, i;
843 ret = snprintf(buf, remain,
"%s %s %s use %u",
844 nftnl_family2str(c->family), c->table, c->name, c->use);
845 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
847 if (c->flags & (1 << NFTNL_CHAIN_HOOKNUM)) {
848 ret = snprintf(buf + offset, remain,
" type %s hook %s prio %d",
849 c->type, nftnl_hooknum2str(c->family, c->hooknum),
851 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
853 if (c->flags & (1 << NFTNL_CHAIN_POLICY)) {
854 ret = snprintf(buf + offset, remain,
" policy %s",
855 nftnl_verdict2str(c->policy));
856 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
859 ret = snprintf(buf + offset, remain,
860 " packets %"PRIu64
" bytes %"PRIu64
"",
861 c->packets, c->bytes);
862 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
864 if (c->flags & (1 << NFTNL_CHAIN_DEV)) {
865 ret = snprintf(buf + offset, remain,
" dev %s ",
867 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
869 if (c->flags & (1 << NFTNL_CHAIN_DEVICES)) {
870 ret = snprintf(buf + offset, remain,
" dev { ");
871 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
873 for (i = 0; i < c->dev_array_len; i++) {
874 ret = snprintf(buf + offset, remain,
" %s ",
876 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
878 ret = snprintf(buf + offset, remain,
" } ");
879 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
881 if (c->flags & (1 << NFTNL_CHAIN_FLAGS)) {
882 ret = snprintf(buf + offset, remain,
" flags %x",
884 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
886 if (c->flags & (1 << NFTNL_CHAIN_ID)) {
887 ret = snprintf(buf + offset, remain,
" id %x",
889 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
896static int nftnl_chain_cmd_snprintf(
char *buf,
size_t remain,
898 uint32_t type, uint32_t flags)
902 if (type != NFTNL_OUTPUT_DEFAULT)
905 ret = nftnl_chain_snprintf_default(buf + offset, remain, c);
906 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
910EXPORT_SYMBOL(nftnl_chain_snprintf);
911int nftnl_chain_snprintf(
char *buf,
size_t size,
const struct nftnl_chain *c,
912 uint32_t type, uint32_t flags)
917 return nftnl_chain_cmd_snprintf(buf, size, c, nftnl_flag2cmd(flags),
921static int nftnl_chain_do_snprintf(
char *buf,
size_t size,
const void *c,
922 uint32_t cmd, uint32_t type, uint32_t flags)
924 return nftnl_chain_snprintf(buf, size, c, type, flags);
927EXPORT_SYMBOL(nftnl_chain_fprintf);
928int nftnl_chain_fprintf(FILE *fp,
const struct nftnl_chain *c, uint32_t type,
931 return nftnl_fprintf(fp, c, NFTNL_CMD_UNSPEC, type, flags,
932 nftnl_chain_do_snprintf);
935EXPORT_SYMBOL(nftnl_rule_foreach);
937 int (*cb)(
struct nftnl_rule *r,
void *data),
940 struct nftnl_rule *cur, *tmp;
943 list_for_each_entry_safe(cur, tmp, &c->rule_list, head) {
951EXPORT_SYMBOL(nftnl_rule_lookup_byindex);
953nftnl_rule_lookup_byindex(
struct nftnl_chain *c, uint32_t index)
955 struct nftnl_rule *r;
957 list_for_each_entry(r, &c->rule_list, head) {
967 struct nftnl_rule *cur;
970static void nftnl_rule_iter_init(
const struct nftnl_chain *c,
974 if (list_empty(&c->rule_list))
977 iter->cur = list_entry(c->rule_list.next,
struct nftnl_rule,
981EXPORT_SYMBOL(nftnl_rule_iter_create);
990 nftnl_rule_iter_init(c, iter);
995EXPORT_SYMBOL(nftnl_rule_iter_next);
998 struct nftnl_rule *rule = iter->cur;
1004 iter->cur = list_entry(iter->cur->head.next,
struct nftnl_rule, head);
1005 if (&iter->cur->head == iter->c->rule_list.next)
1011EXPORT_SYMBOL(nftnl_rule_iter_destroy);
1017#define CHAIN_NAME_HSIZE 512
1021 struct list_head list;
1022 struct hlist_head name_hash[CHAIN_NAME_HSIZE];
1025EXPORT_SYMBOL(nftnl_chain_list_alloc);
1035 INIT_LIST_HEAD(&list->list);
1036 for (i = 0; i < CHAIN_NAME_HSIZE; i++)
1037 INIT_HLIST_HEAD(&list->name_hash[i]);
1042EXPORT_SYMBOL(nftnl_chain_list_free);
1047 list_for_each_entry_safe(r, tmp, &list->list, head) {
1049 hlist_del(&r->hnode);
1050 nftnl_chain_free(r);
1055EXPORT_SYMBOL(nftnl_chain_list_is_empty);
1058 return list_empty(&list->list);
1061static uint32_t djb_hash(
const char *key)
1063 uint32_t i, hash = 5381;
1065 for (i = 0; i < strlen(key); i++)
1066 hash = ((hash << 5) + hash) + key[i];
1071EXPORT_SYMBOL(nftnl_chain_list_add);
1074 int key = djb_hash(r->name) % CHAIN_NAME_HSIZE;
1076 hlist_add_head(&r->hnode, &list->name_hash[key]);
1077 list_add(&r->head, &list->list);
1080EXPORT_SYMBOL(nftnl_chain_list_add_tail);
1083 int key = djb_hash(r->name) % CHAIN_NAME_HSIZE;
1085 hlist_add_head(&r->hnode, &list->name_hash[key]);
1086 list_add_tail(&r->head, &list->list);
1089EXPORT_SYMBOL(nftnl_chain_list_del);
1093 hlist_del(&r->hnode);
1096EXPORT_SYMBOL(nftnl_chain_list_foreach);
1104 list_for_each_entry_safe(cur, tmp, &chain_list->list, head) {
1105 ret = cb(cur, data);
1112EXPORT_SYMBOL(nftnl_chain_list_lookup_byname);
1117 int key = djb_hash(chain) % CHAIN_NAME_HSIZE;
1119 struct hlist_node *n;
1121 hlist_for_each_entry(c, n, &chain_list->name_hash[key], hnode) {
1122 if (!strcmp(chain, c->name))
1133EXPORT_SYMBOL(nftnl_chain_list_iter_create);
1144 if (nftnl_chain_list_is_empty(l))
1147 iter->cur = list_entry(l->list.next,
struct nftnl_chain, head);
1152EXPORT_SYMBOL(nftnl_chain_list_iter_next);
1161 iter->cur = list_entry(iter->cur->head.next,
struct nftnl_chain, head);
1162 if (&iter->cur->head == iter->list->list.next)
1168EXPORT_SYMBOL(nftnl_chain_list_iter_destroy);