17#include <netinet/in.h>
20#include <libmnl/libmnl.h>
21#include <linux/netfilter/nfnetlink.h>
22#include <linux/netfilter/nf_tables.h>
24#include <libnftnl/object.h>
27static struct obj_ops *obj_ops[__NFT_OBJECT_MAX] = {
28 [NFT_OBJECT_COUNTER] = &obj_ops_counter,
29 [NFT_OBJECT_QUOTA] = &obj_ops_quota,
30 [NFT_OBJECT_CT_HELPER] = &obj_ops_ct_helper,
31 [NFT_OBJECT_LIMIT] = &obj_ops_limit,
32 [NFT_OBJECT_TUNNEL] = &obj_ops_tunnel,
33 [NFT_OBJECT_CT_TIMEOUT] = &obj_ops_ct_timeout,
34 [NFT_OBJECT_SECMARK] = &obj_ops_secmark,
35 [NFT_OBJECT_CT_EXPECT] = &obj_ops_ct_expect,
36 [NFT_OBJECT_SYNPROXY] = &obj_ops_synproxy,
39static struct obj_ops *nftnl_obj_ops_lookup(uint32_t type)
41 if (type > NFT_OBJECT_MAX)
47EXPORT_SYMBOL(nftnl_obj_alloc);
48struct nftnl_obj *nftnl_obj_alloc(
void)
50 return calloc(1,
sizeof(
struct nftnl_obj));
53EXPORT_SYMBOL(nftnl_obj_free);
54void nftnl_obj_free(
const struct nftnl_obj *obj)
56 if (obj->flags & (1 << NFTNL_OBJ_TABLE))
58 if (obj->flags & (1 << NFTNL_OBJ_NAME))
60 if (obj->flags & (1 << NFTNL_OBJ_USERDATA))
61 xfree(obj->user.data);
66EXPORT_SYMBOL(nftnl_obj_is_set);
67bool nftnl_obj_is_set(
const struct nftnl_obj *obj, uint16_t attr)
69 return obj->flags & (1 << attr);
72static uint32_t nftnl_obj_validate[NFTNL_OBJ_MAX + 1] = {
73 [NFTNL_OBJ_FAMILY] =
sizeof(uint32_t),
74 [NFTNL_OBJ_USE] =
sizeof(uint32_t),
75 [NFTNL_OBJ_HANDLE] =
sizeof(uint64_t),
78EXPORT_SYMBOL(nftnl_obj_set_data);
79void nftnl_obj_set_data(
struct nftnl_obj *obj, uint16_t attr,
80 const void *data, uint32_t data_len)
82 if (attr < NFTNL_OBJ_MAX)
83 nftnl_assert_validate(data, nftnl_obj_validate, attr, data_len);
88 obj->table = strdup(data);
92 obj->name = strdup(data);
95 obj->ops = nftnl_obj_ops_lookup(*((uint32_t *)data));
99 case NFTNL_OBJ_FAMILY:
100 memcpy(&obj->family, data,
sizeof(obj->family));
103 memcpy(&obj->use, data,
sizeof(obj->use));
105 case NFTNL_OBJ_HANDLE:
106 memcpy(&obj->handle, data,
sizeof(obj->handle));
108 case NFTNL_OBJ_USERDATA:
109 if (obj->flags & (1 << NFTNL_OBJ_USERDATA))
110 xfree(obj->user.data);
112 obj->user.data = malloc(data_len);
115 memcpy(obj->user.data, data, data_len);
116 obj->user.len = data_len;
120 obj->ops->set(obj, attr, data, data_len);
123 obj->flags |= (1 << attr);
126void nftnl_obj_set(
struct nftnl_obj *obj, uint16_t attr,
const void *data) __visible;
127void nftnl_obj_set(
struct nftnl_obj *obj, uint16_t attr,
const void *data)
129 nftnl_obj_set_data(obj, attr, data, nftnl_obj_validate[attr]);
132EXPORT_SYMBOL(nftnl_obj_set_u8);
133void nftnl_obj_set_u8(
struct nftnl_obj *obj, uint16_t attr, uint8_t val)
135 nftnl_obj_set_data(obj, attr, &val,
sizeof(uint8_t));
138EXPORT_SYMBOL(nftnl_obj_set_u16);
139void nftnl_obj_set_u16(
struct nftnl_obj *obj, uint16_t attr, uint16_t val)
141 nftnl_obj_set_data(obj, attr, &val,
sizeof(uint16_t));
144EXPORT_SYMBOL(nftnl_obj_set_u32);
145void nftnl_obj_set_u32(
struct nftnl_obj *obj, uint16_t attr, uint32_t val)
147 nftnl_obj_set_data(obj, attr, &val,
sizeof(uint32_t));
150EXPORT_SYMBOL(nftnl_obj_set_u64);
151void nftnl_obj_set_u64(
struct nftnl_obj *obj, uint16_t attr, uint64_t val)
153 nftnl_obj_set_data(obj, attr, &val,
sizeof(uint64_t));
156EXPORT_SYMBOL(nftnl_obj_set_str);
157void nftnl_obj_set_str(
struct nftnl_obj *obj, uint16_t attr,
const char *str)
159 nftnl_obj_set_data(obj, attr, str, 0);
162EXPORT_SYMBOL(nftnl_obj_get_data);
163const void *nftnl_obj_get_data(
struct nftnl_obj *obj, uint16_t attr,
166 if (!(obj->flags & (1 << attr)))
170 case NFTNL_OBJ_TABLE:
178 *data_len =
sizeof(uint32_t);
179 return &obj->ops->type;
180 case NFTNL_OBJ_FAMILY:
181 *data_len =
sizeof(uint32_t);
184 *data_len =
sizeof(uint32_t);
186 case NFTNL_OBJ_HANDLE:
187 *data_len =
sizeof(uint64_t);
189 case NFTNL_OBJ_USERDATA:
190 *data_len = obj->user.len;
191 return obj->user.data;
194 return obj->ops->get(obj, attr, data_len);
200EXPORT_SYMBOL(nftnl_obj_get);
201const void *nftnl_obj_get(
struct nftnl_obj *obj, uint16_t attr)
204 return nftnl_obj_get_data(obj, attr, &data_len);
207EXPORT_SYMBOL(nftnl_obj_get_u8);
208uint8_t nftnl_obj_get_u8(
struct nftnl_obj *obj, uint16_t attr)
210 const void *ret = nftnl_obj_get(obj, attr);
211 return ret == NULL ? 0 : *((uint8_t *)ret);
214EXPORT_SYMBOL(nftnl_obj_get_u16);
215uint16_t nftnl_obj_get_u16(
struct nftnl_obj *obj, uint16_t attr)
217 const void *ret = nftnl_obj_get(obj, attr);
218 return ret == NULL ? 0 : *((uint16_t *)ret);
221EXPORT_SYMBOL(nftnl_obj_get_u32);
222uint32_t nftnl_obj_get_u32(
struct nftnl_obj *obj, uint16_t attr)
224 const void *ret = nftnl_obj_get(obj, attr);
225 return ret == NULL ? 0 : *((uint32_t *)ret);
228EXPORT_SYMBOL(nftnl_obj_get_u64);
229uint64_t nftnl_obj_get_u64(
struct nftnl_obj *obj, uint16_t attr)
231 const void *ret = nftnl_obj_get(obj, attr);
232 return ret == NULL ? 0 : *((uint64_t *)ret);
235EXPORT_SYMBOL(nftnl_obj_get_str);
236const char *nftnl_obj_get_str(
struct nftnl_obj *obj, uint16_t attr)
238 return nftnl_obj_get(obj, attr);
241EXPORT_SYMBOL(nftnl_obj_nlmsg_build_payload);
242void nftnl_obj_nlmsg_build_payload(
struct nlmsghdr *nlh,
243 const struct nftnl_obj *obj)
245 if (obj->flags & (1 << NFTNL_OBJ_TABLE))
246 mnl_attr_put_strz(nlh, NFTA_OBJ_TABLE, obj->table);
247 if (obj->flags & (1 << NFTNL_OBJ_NAME))
248 mnl_attr_put_strz(nlh, NFTA_OBJ_NAME, obj->name);
249 if (obj->flags & (1 << NFTNL_OBJ_TYPE))
250 mnl_attr_put_u32(nlh, NFTA_OBJ_TYPE, htonl(obj->ops->type));
251 if (obj->flags & (1 << NFTNL_OBJ_HANDLE))
252 mnl_attr_put_u64(nlh, NFTA_OBJ_HANDLE, htobe64(obj->handle));
253 if (obj->flags & (1 << NFTNL_OBJ_USERDATA))
254 mnl_attr_put(nlh, NFTA_OBJ_USERDATA, obj->user.len, obj->user.data);
256 struct nlattr *nest = mnl_attr_nest_start(nlh, NFTA_OBJ_DATA);
258 obj->ops->build(nlh, obj);
259 mnl_attr_nest_end(nlh, nest);
263static int nftnl_obj_parse_attr_cb(
const struct nlattr *attr,
void *data)
265 const struct nlattr **tb = data;
266 int type = mnl_attr_get_type(attr);
268 if (mnl_attr_type_valid(attr, NFTA_OBJ_MAX) < 0)
274 if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
277 case NFTA_OBJ_HANDLE:
278 if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
282 if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0)
286 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
289 case NFTA_OBJ_USERDATA:
290 if (mnl_attr_validate(attr, MNL_TYPE_BINARY) < 0)
299EXPORT_SYMBOL(nftnl_obj_nlmsg_parse);
300int nftnl_obj_nlmsg_parse(
const struct nlmsghdr *nlh,
struct nftnl_obj *obj)
302 struct nfgenmsg *nfg = mnl_nlmsg_get_payload(nlh);
303 struct nlattr *tb[NFTA_OBJ_MAX + 1] = {};
306 if (mnl_attr_parse(nlh,
sizeof(*nfg), nftnl_obj_parse_attr_cb, tb) < 0)
309 if (tb[NFTA_OBJ_TABLE]) {
310 obj->table = strdup(mnl_attr_get_str(tb[NFTA_OBJ_TABLE]));
311 obj->flags |= (1 << NFTNL_OBJ_TABLE);
313 if (tb[NFTA_OBJ_NAME]) {
314 obj->name = strdup(mnl_attr_get_str(tb[NFTA_OBJ_NAME]));
315 obj->flags |= (1 << NFTNL_OBJ_NAME);
317 if (tb[NFTA_OBJ_TYPE]) {
318 uint32_t type = ntohl(mnl_attr_get_u32(tb[NFTA_OBJ_TYPE]));
320 obj->ops = nftnl_obj_ops_lookup(type);
322 obj->flags |= (1 << NFTNL_OBJ_TYPE);
324 if (tb[NFTA_OBJ_DATA]) {
326 err = obj->ops->parse(obj, tb[NFTA_OBJ_DATA]);
331 if (tb[NFTA_OBJ_USE]) {
332 obj->use = ntohl(mnl_attr_get_u32(tb[NFTA_OBJ_USE]));
333 obj->flags |= (1 << NFTNL_OBJ_USE);
335 if (tb[NFTA_OBJ_HANDLE]) {
336 obj->handle = be64toh(mnl_attr_get_u64(tb[NFTA_OBJ_HANDLE]));
337 obj->flags |= (1 << NFTNL_OBJ_HANDLE);
339 if (tb[NFTA_OBJ_USERDATA]) {
340 nftnl_obj_set_data(obj, NFTNL_OBJ_USERDATA,
341 mnl_attr_get_payload(tb[NFTA_OBJ_USERDATA]),
342 mnl_attr_get_payload_len(tb[NFTA_OBJ_USERDATA]));
345 obj->family = nfg->nfgen_family;
346 obj->flags |= (1 << NFTNL_OBJ_FAMILY);
351static int nftnl_obj_do_parse(
struct nftnl_obj *obj,
enum nftnl_parse_type type,
352 const void *data,
struct nftnl_parse_err *err,
353 enum nftnl_parse_input input)
355 struct nftnl_parse_err perr = {};
359 case NFTNL_PARSE_JSON:
360 case NFTNL_PARSE_XML:
373EXPORT_SYMBOL(nftnl_obj_parse);
374int nftnl_obj_parse(
struct nftnl_obj *obj,
enum nftnl_parse_type type,
375 const char *data,
struct nftnl_parse_err *err)
377 return nftnl_obj_do_parse(obj, type, data, err, NFTNL_PARSE_BUFFER);
380EXPORT_SYMBOL(nftnl_obj_parse_file);
381int nftnl_obj_parse_file(
struct nftnl_obj *obj,
enum nftnl_parse_type type,
382 FILE *fp,
struct nftnl_parse_err *err)
384 return nftnl_obj_do_parse(obj, type, fp, err, NFTNL_PARSE_FILE);
387static int nftnl_obj_snprintf_dflt(
char *buf,
size_t remain,
388 const struct nftnl_obj *obj,
389 uint32_t type, uint32_t flags)
391 const char *name = obj->ops ? obj->ops->name :
"(unknown)";
394 ret = snprintf(buf, remain,
"table %s name %s use %u [ %s ",
395 obj->table, obj->name, obj->use, name);
396 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
399 ret = obj->ops->output(buf + offset, remain, flags, obj);
400 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
402 ret = snprintf(buf + offset, remain,
"]");
403 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
408static int nftnl_obj_cmd_snprintf(
char *buf,
size_t remain,
409 const struct nftnl_obj *obj, uint32_t cmd,
410 uint32_t type, uint32_t flags)
414 if (type != NFTNL_OUTPUT_DEFAULT)
417 ret = nftnl_obj_snprintf_dflt(buf + offset, remain, obj, type, flags);
418 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
422EXPORT_SYMBOL(nftnl_obj_snprintf);
423int nftnl_obj_snprintf(
char *buf,
size_t size,
const struct nftnl_obj *obj,
424 uint32_t type, uint32_t flags)
429 return nftnl_obj_cmd_snprintf(buf, size, obj, nftnl_flag2cmd(flags),
433static int nftnl_obj_do_snprintf(
char *buf,
size_t size,
const void *obj,
434 uint32_t cmd, uint32_t type, uint32_t flags)
436 return nftnl_obj_snprintf(buf, size, obj, type, flags);
439EXPORT_SYMBOL(nftnl_obj_fprintf);
440int nftnl_obj_fprintf(FILE *fp,
const struct nftnl_obj *obj, uint32_t type,
443 return nftnl_fprintf(fp, obj, NFTNL_CMD_UNSPEC, type, flags,
444 nftnl_obj_do_snprintf);
448 struct list_head list;
451EXPORT_SYMBOL(nftnl_obj_list_alloc);
460 INIT_LIST_HEAD(&list->list);
465EXPORT_SYMBOL(nftnl_obj_list_free);
468 struct nftnl_obj *r, *tmp;
470 list_for_each_entry_safe(r, tmp, &list->list, head) {
477EXPORT_SYMBOL(nftnl_obj_list_is_empty);
480 return list_empty(&list->list);
483EXPORT_SYMBOL(nftnl_obj_list_add);
484void nftnl_obj_list_add(
struct nftnl_obj *r,
struct nftnl_obj_list *list)
486 list_add(&r->head, &list->list);
489EXPORT_SYMBOL(nftnl_obj_list_add_tail);
490void nftnl_obj_list_add_tail(
struct nftnl_obj *r,
493 list_add_tail(&r->head, &list->list);
496EXPORT_SYMBOL(nftnl_obj_list_del);
497void nftnl_obj_list_del(
struct nftnl_obj *t)
502EXPORT_SYMBOL(nftnl_obj_list_foreach);
504 int (*cb)(
struct nftnl_obj *t,
void *data),
507 struct nftnl_obj *cur, *tmp;
510 list_for_each_entry_safe(cur, tmp, &table_list->list, head) {
520 struct nftnl_obj *cur;
523EXPORT_SYMBOL(nftnl_obj_list_iter_create);
534 if (nftnl_obj_list_is_empty(l))
537 iter->cur = list_entry(l->list.next,
struct nftnl_obj, head);
542EXPORT_SYMBOL(nftnl_obj_list_iter_next);
545 struct nftnl_obj *r = iter->cur;
551 iter->cur = list_entry(iter->cur->head.next,
struct nftnl_obj, head);
552 if (&iter->cur->head == iter->list->list.next)
558EXPORT_SYMBOL(nftnl_obj_list_iter_destroy);