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>
28 static struct obj_ops *obj_ops[__NFT_OBJECT_MAX] = {
29 [NFT_OBJECT_COUNTER] = &obj_ops_counter,
30 [NFT_OBJECT_QUOTA] = &obj_ops_quota,
31 [NFT_OBJECT_CT_HELPER] = &obj_ops_ct_helper,
32 [NFT_OBJECT_LIMIT] = &obj_ops_limit,
33 [NFT_OBJECT_TUNNEL] = &obj_ops_tunnel,
34 [NFT_OBJECT_CT_TIMEOUT] = &obj_ops_ct_timeout,
35 [NFT_OBJECT_SECMARK] = &obj_ops_secmark,
36 [NFT_OBJECT_CT_EXPECT] = &obj_ops_ct_expect,
37 [NFT_OBJECT_SYNPROXY] = &obj_ops_synproxy,
40 static struct obj_ops *nftnl_obj_ops_lookup(uint32_t type)
42 if (type > NFT_OBJECT_MAX)
48 EXPORT_SYMBOL(nftnl_obj_alloc);
49 struct nftnl_obj *nftnl_obj_alloc(
void)
51 return calloc(1,
sizeof(
struct nftnl_obj));
54 EXPORT_SYMBOL(nftnl_obj_free);
55 void nftnl_obj_free(
const struct nftnl_obj *obj)
57 if (obj->flags & (1 << NFTNL_OBJ_TABLE))
59 if (obj->flags & (1 << NFTNL_OBJ_NAME))
65 EXPORT_SYMBOL(nftnl_obj_is_set);
66 bool nftnl_obj_is_set(
const struct nftnl_obj *obj, uint16_t attr)
68 return obj->flags & (1 << attr);
71 static uint32_t nftnl_obj_validate[NFTNL_OBJ_MAX + 1] = {
72 [NFTNL_OBJ_FAMILY] =
sizeof(uint32_t),
73 [NFTNL_OBJ_USE] =
sizeof(uint32_t),
74 [NFTNL_OBJ_HANDLE] =
sizeof(uint64_t),
77 EXPORT_SYMBOL(nftnl_obj_set_data);
78 void nftnl_obj_set_data(
struct nftnl_obj *obj, uint16_t attr,
79 const void *data, uint32_t data_len)
81 if (attr < NFTNL_OBJ_MAX)
82 nftnl_assert_validate(data, nftnl_obj_validate, attr, data_len);
87 obj->table = strdup(data);
91 obj->name = strdup(data);
94 obj->ops = nftnl_obj_ops_lookup(*((uint32_t *)data));
98 case NFTNL_OBJ_FAMILY:
99 memcpy(&obj->family, data,
sizeof(obj->family));
102 memcpy(&obj->use, data,
sizeof(obj->use));
104 case NFTNL_OBJ_HANDLE:
105 memcpy(&obj->handle, data,
sizeof(obj->handle));
109 obj->ops->set(obj, attr, data, data_len);
112 obj->flags |= (1 << attr);
115 void nftnl_obj_set(
struct nftnl_obj *obj, uint16_t attr,
const void *data) __visible;
116 void nftnl_obj_set(
struct nftnl_obj *obj, uint16_t attr,
const void *data)
118 nftnl_obj_set_data(obj, attr, data, nftnl_obj_validate[attr]);
121 EXPORT_SYMBOL(nftnl_obj_set_u8);
122 void nftnl_obj_set_u8(
struct nftnl_obj *obj, uint16_t attr, uint8_t val)
124 nftnl_obj_set_data(obj, attr, &val,
sizeof(uint8_t));
127 EXPORT_SYMBOL(nftnl_obj_set_u16);
128 void nftnl_obj_set_u16(
struct nftnl_obj *obj, uint16_t attr, uint16_t val)
130 nftnl_obj_set_data(obj, attr, &val,
sizeof(uint16_t));
133 EXPORT_SYMBOL(nftnl_obj_set_u32);
134 void nftnl_obj_set_u32(
struct nftnl_obj *obj, uint16_t attr, uint32_t val)
136 nftnl_obj_set_data(obj, attr, &val,
sizeof(uint32_t));
139 EXPORT_SYMBOL(nftnl_obj_set_u64);
140 void nftnl_obj_set_u64(
struct nftnl_obj *obj, uint16_t attr, uint64_t val)
142 nftnl_obj_set_data(obj, attr, &val,
sizeof(uint64_t));
145 EXPORT_SYMBOL(nftnl_obj_set_str);
146 void nftnl_obj_set_str(
struct nftnl_obj *obj, uint16_t attr,
const char *str)
148 nftnl_obj_set_data(obj, attr, str, 0);
151 EXPORT_SYMBOL(nftnl_obj_get_data);
152 const void *nftnl_obj_get_data(
struct nftnl_obj *obj, uint16_t attr,
155 if (!(obj->flags & (1 << attr)))
159 case NFTNL_OBJ_TABLE:
167 *data_len =
sizeof(uint32_t);
168 return &obj->ops->type;
169 case NFTNL_OBJ_FAMILY:
170 *data_len =
sizeof(uint32_t);
173 *data_len =
sizeof(uint32_t);
175 case NFTNL_OBJ_HANDLE:
176 *data_len =
sizeof(uint64_t);
180 return obj->ops->get(obj, attr, data_len);
186 EXPORT_SYMBOL(nftnl_obj_get);
187 const void *nftnl_obj_get(
struct nftnl_obj *obj, uint16_t attr)
190 return nftnl_obj_get_data(obj, attr, &data_len);
193 EXPORT_SYMBOL(nftnl_obj_get_u8);
194 uint8_t nftnl_obj_get_u8(
struct nftnl_obj *obj, uint16_t attr)
196 const void *ret = nftnl_obj_get(obj, attr);
197 return ret == NULL ? 0 : *((uint8_t *)ret);
200 EXPORT_SYMBOL(nftnl_obj_get_u16);
201 uint16_t nftnl_obj_get_u16(
struct nftnl_obj *obj, uint16_t attr)
203 const void *ret = nftnl_obj_get(obj, attr);
204 return ret == NULL ? 0 : *((uint16_t *)ret);
207 EXPORT_SYMBOL(nftnl_obj_get_u32);
208 uint32_t nftnl_obj_get_u32(
struct nftnl_obj *obj, uint16_t attr)
210 const void *ret = nftnl_obj_get(obj, attr);
211 return ret == NULL ? 0 : *((uint32_t *)ret);
214 EXPORT_SYMBOL(nftnl_obj_get_u64);
215 uint64_t nftnl_obj_get_u64(
struct nftnl_obj *obj, uint16_t attr)
217 const void *ret = nftnl_obj_get(obj, attr);
218 return ret == NULL ? 0 : *((uint64_t *)ret);
221 EXPORT_SYMBOL(nftnl_obj_get_str);
222 const char *nftnl_obj_get_str(
struct nftnl_obj *obj, uint16_t attr)
224 return nftnl_obj_get(obj, attr);
227 EXPORT_SYMBOL(nftnl_obj_nlmsg_build_payload);
228 void nftnl_obj_nlmsg_build_payload(
struct nlmsghdr *nlh,
229 const struct nftnl_obj *obj)
231 if (obj->flags & (1 << NFTNL_OBJ_TABLE))
232 mnl_attr_put_strz(nlh, NFTA_OBJ_TABLE, obj->table);
233 if (obj->flags & (1 << NFTNL_OBJ_NAME))
234 mnl_attr_put_strz(nlh, NFTA_OBJ_NAME, obj->name);
235 if (obj->flags & (1 << NFTNL_OBJ_TYPE))
236 mnl_attr_put_u32(nlh, NFTA_OBJ_TYPE, htonl(obj->ops->type));
237 if (obj->flags & (1 << NFTNL_OBJ_HANDLE))
238 mnl_attr_put_u64(nlh, NFTA_OBJ_HANDLE, htobe64(obj->handle));
240 struct nlattr *nest = mnl_attr_nest_start(nlh, NFTA_OBJ_DATA);
242 obj->ops->build(nlh, obj);
243 mnl_attr_nest_end(nlh, nest);
247 static int nftnl_obj_parse_attr_cb(
const struct nlattr *attr,
void *data)
249 const struct nlattr **tb = data;
250 int type = mnl_attr_get_type(attr);
252 if (mnl_attr_type_valid(attr, NFTA_OBJ_MAX) < 0)
258 if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
261 case NFTA_OBJ_HANDLE:
262 if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
266 if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0)
270 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
279 EXPORT_SYMBOL(nftnl_obj_nlmsg_parse);
280 int nftnl_obj_nlmsg_parse(
const struct nlmsghdr *nlh,
struct nftnl_obj *obj)
282 struct nfgenmsg *nfg = mnl_nlmsg_get_payload(nlh);
283 struct nlattr *tb[NFTA_OBJ_MAX + 1] = {};
286 if (mnl_attr_parse(nlh,
sizeof(*nfg), nftnl_obj_parse_attr_cb, tb) < 0)
289 if (tb[NFTA_OBJ_TABLE]) {
290 obj->table = strdup(mnl_attr_get_str(tb[NFTA_OBJ_TABLE]));
291 obj->flags |= (1 << NFTNL_OBJ_TABLE);
293 if (tb[NFTA_OBJ_NAME]) {
294 obj->name = strdup(mnl_attr_get_str(tb[NFTA_OBJ_NAME]));
295 obj->flags |= (1 << NFTNL_OBJ_NAME);
297 if (tb[NFTA_OBJ_TYPE]) {
298 uint32_t type = ntohl(mnl_attr_get_u32(tb[NFTA_OBJ_TYPE]));
300 obj->ops = nftnl_obj_ops_lookup(type);
302 obj->flags |= (1 << NFTNL_OBJ_TYPE);
304 if (tb[NFTA_OBJ_DATA]) {
306 err = obj->ops->parse(obj, tb[NFTA_OBJ_DATA]);
311 if (tb[NFTA_OBJ_USE]) {
312 obj->use = ntohl(mnl_attr_get_u32(tb[NFTA_OBJ_USE]));
313 obj->flags |= (1 << NFTNL_OBJ_USE);
315 if (tb[NFTA_OBJ_HANDLE]) {
316 obj->handle = be64toh(mnl_attr_get_u64(tb[NFTA_OBJ_HANDLE]));
317 obj->flags |= (1 << NFTNL_OBJ_HANDLE);
320 obj->family = nfg->nfgen_family;
321 obj->flags |= (1 << NFTNL_OBJ_FAMILY);
326 static int nftnl_obj_do_parse(
struct nftnl_obj *obj,
enum nftnl_parse_type type,
327 const void *data,
struct nftnl_parse_err *err,
328 enum nftnl_parse_input input)
330 struct nftnl_parse_err perr = {};
334 case NFTNL_PARSE_JSON:
335 case NFTNL_PARSE_XML:
348 EXPORT_SYMBOL(nftnl_obj_parse);
349 int nftnl_obj_parse(
struct nftnl_obj *obj,
enum nftnl_parse_type type,
350 const char *data,
struct nftnl_parse_err *err)
352 return nftnl_obj_do_parse(obj, type, data, err, NFTNL_PARSE_BUFFER);
355 EXPORT_SYMBOL(nftnl_obj_parse_file);
356 int nftnl_obj_parse_file(
struct nftnl_obj *obj,
enum nftnl_parse_type type,
357 FILE *fp,
struct nftnl_parse_err *err)
359 return nftnl_obj_do_parse(obj, type, fp, err, NFTNL_PARSE_FILE);
362 static int nftnl_obj_snprintf_dflt(
char *buf,
size_t size,
363 const struct nftnl_obj *obj,
364 uint32_t type, uint32_t flags)
366 const char *name = obj->ops ? obj->ops->name :
"(unknown)";
367 int ret, remain = size, offset = 0;
369 ret = snprintf(buf, size,
"table %s name %s use %u [ %s ",
370 obj->table, obj->name, obj->use, name);
371 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
374 ret = obj->ops->snprintf(buf + offset, offset, type, flags,
376 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
378 ret = snprintf(buf + offset, offset,
"]");
379 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
384 static int nftnl_obj_cmd_snprintf(
char *buf,
size_t size,
385 const struct nftnl_obj *obj, uint32_t cmd,
386 uint32_t type, uint32_t flags)
388 int ret, remain = size, offset = 0;
391 case NFTNL_OUTPUT_DEFAULT:
392 ret = nftnl_obj_snprintf_dflt(buf + offset, remain, obj, type,
395 case NFTNL_OUTPUT_JSON:
396 case NFTNL_OUTPUT_XML:
400 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
405 EXPORT_SYMBOL(nftnl_obj_snprintf);
406 int nftnl_obj_snprintf(
char *buf,
size_t size,
const struct nftnl_obj *obj,
407 uint32_t type, uint32_t flags)
412 return nftnl_obj_cmd_snprintf(buf, size, obj, nftnl_flag2cmd(flags),
416 static int nftnl_obj_do_snprintf(
char *buf,
size_t size,
const void *obj,
417 uint32_t cmd, uint32_t type, uint32_t flags)
419 return nftnl_obj_snprintf(buf, size, obj, type, flags);
422 EXPORT_SYMBOL(nftnl_obj_fprintf);
423 int nftnl_obj_fprintf(FILE *fp,
const struct nftnl_obj *obj, uint32_t type,
426 return nftnl_fprintf(fp, obj, NFTNL_CMD_UNSPEC, type, flags,
427 nftnl_obj_do_snprintf);
431 struct list_head list;
434 EXPORT_SYMBOL(nftnl_obj_list_alloc);
443 INIT_LIST_HEAD(&list->list);
448 EXPORT_SYMBOL(nftnl_obj_list_free);
451 struct nftnl_obj *r, *tmp;
453 list_for_each_entry_safe(r, tmp, &list->list, head) {
460 EXPORT_SYMBOL(nftnl_obj_list_is_empty);
463 return list_empty(&list->list);
466 EXPORT_SYMBOL(nftnl_obj_list_add);
467 void nftnl_obj_list_add(
struct nftnl_obj *r,
struct nftnl_obj_list *list)
469 list_add(&r->head, &list->list);
472 EXPORT_SYMBOL(nftnl_obj_list_add_tail);
473 void nftnl_obj_list_add_tail(
struct nftnl_obj *r,
476 list_add_tail(&r->head, &list->list);
479 EXPORT_SYMBOL(nftnl_obj_list_del);
480 void nftnl_obj_list_del(
struct nftnl_obj *t)
485 EXPORT_SYMBOL(nftnl_obj_list_foreach);
487 int (*cb)(
struct nftnl_obj *t,
void *data),
490 struct nftnl_obj *cur, *tmp;
493 list_for_each_entry_safe(cur, tmp, &table_list->list, head) {
503 struct nftnl_obj *cur;
506 EXPORT_SYMBOL(nftnl_obj_list_iter_create);
517 if (nftnl_obj_list_is_empty(l))
520 iter->cur = list_entry(l->list.next,
struct nftnl_obj, head);
525 EXPORT_SYMBOL(nftnl_obj_list_iter_next);
528 struct nftnl_obj *r = iter->cur;
534 iter->cur = list_entry(iter->cur->head.next,
struct nftnl_obj, head);
535 if (&iter->cur->head == iter->list->list.next)
541 EXPORT_SYMBOL(nftnl_obj_list_iter_destroy);