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,
39 static struct obj_ops *nftnl_obj_ops_lookup(uint32_t type)
41 if (type > NFT_OBJECT_MAX)
47 EXPORT_SYMBOL(nftnl_obj_alloc);
48 struct nftnl_obj *nftnl_obj_alloc(
void)
50 return calloc(1,
sizeof(
struct nftnl_obj));
53 EXPORT_SYMBOL(nftnl_obj_free);
54 void nftnl_obj_free(
const struct nftnl_obj *obj)
56 if (obj->flags & (1 << NFTNL_OBJ_TABLE))
58 if (obj->flags & (1 << NFTNL_OBJ_NAME))
64 EXPORT_SYMBOL(nftnl_obj_is_set);
65 bool nftnl_obj_is_set(
const struct nftnl_obj *obj, uint16_t attr)
67 return obj->flags & (1 << attr);
70 static uint32_t nftnl_obj_validate[NFTNL_OBJ_MAX + 1] = {
71 [NFTNL_OBJ_FAMILY] =
sizeof(uint32_t),
72 [NFTNL_OBJ_USE] =
sizeof(uint32_t),
73 [NFTNL_OBJ_HANDLE] =
sizeof(uint64_t),
76 EXPORT_SYMBOL(nftnl_obj_set_data);
77 void nftnl_obj_set_data(
struct nftnl_obj *obj, uint16_t attr,
78 const void *data, uint32_t data_len)
80 if (attr < NFTNL_OBJ_MAX)
81 nftnl_assert_validate(data, nftnl_obj_validate, attr, data_len);
86 obj->table = strdup(data);
90 obj->name = strdup(data);
93 obj->ops = nftnl_obj_ops_lookup(*((uint32_t *)data));
97 case NFTNL_OBJ_FAMILY:
98 memcpy(&obj->family, data,
sizeof(obj->family));
101 memcpy(&obj->use, data,
sizeof(obj->use));
103 case NFTNL_OBJ_HANDLE:
104 memcpy(&obj->handle, data,
sizeof(obj->handle));
108 obj->ops->set(obj, attr, data, data_len);
111 obj->flags |= (1 << attr);
114 EXPORT_SYMBOL(nftnl_obj_set);
115 void nftnl_obj_set(
struct nftnl_obj *obj, uint16_t attr,
const void *data)
117 nftnl_obj_set_data(obj, attr, data, nftnl_obj_validate[attr]);
120 EXPORT_SYMBOL(nftnl_obj_set_u8);
121 void nftnl_obj_set_u8(
struct nftnl_obj *obj, uint16_t attr, uint8_t val)
123 nftnl_obj_set_data(obj, attr, &val,
sizeof(uint8_t));
126 EXPORT_SYMBOL(nftnl_obj_set_u16);
127 void nftnl_obj_set_u16(
struct nftnl_obj *obj, uint16_t attr, uint16_t val)
129 nftnl_obj_set_data(obj, attr, &val,
sizeof(uint16_t));
132 EXPORT_SYMBOL(nftnl_obj_set_u32);
133 void nftnl_obj_set_u32(
struct nftnl_obj *obj, uint16_t attr, uint32_t val)
135 nftnl_obj_set_data(obj, attr, &val,
sizeof(uint32_t));
138 EXPORT_SYMBOL(nftnl_obj_set_u64);
139 void nftnl_obj_set_u64(
struct nftnl_obj *obj, uint16_t attr, uint64_t val)
141 nftnl_obj_set_data(obj, attr, &val,
sizeof(uint64_t));
144 EXPORT_SYMBOL(nftnl_obj_set_str);
145 void nftnl_obj_set_str(
struct nftnl_obj *obj, uint16_t attr,
const char *str)
147 nftnl_obj_set_data(obj, attr, str, 0);
150 EXPORT_SYMBOL(nftnl_obj_get_data);
151 const void *nftnl_obj_get_data(
struct nftnl_obj *obj, uint16_t attr,
154 if (!(obj->flags & (1 << attr)))
158 case NFTNL_OBJ_TABLE:
166 *data_len =
sizeof(uint32_t);
167 return &obj->ops->type;
168 case NFTNL_OBJ_FAMILY:
169 *data_len =
sizeof(uint32_t);
172 *data_len =
sizeof(uint32_t);
174 case NFTNL_OBJ_HANDLE:
175 *data_len =
sizeof(uint64_t);
179 return obj->ops->get(obj, attr, data_len);
185 EXPORT_SYMBOL(nftnl_obj_get);
186 const void *nftnl_obj_get(
struct nftnl_obj *obj, uint16_t attr)
189 return nftnl_obj_get_data(obj, attr, &data_len);
192 EXPORT_SYMBOL(nftnl_obj_get_u8);
193 uint8_t nftnl_obj_get_u8(
struct nftnl_obj *obj, uint16_t attr)
195 const void *ret = nftnl_obj_get(obj, attr);
196 return ret == NULL ? 0 : *((uint8_t *)ret);
199 EXPORT_SYMBOL(nftnl_obj_get_u16);
200 uint16_t nftnl_obj_get_u16(
struct nftnl_obj *obj, uint16_t attr)
202 const void *ret = nftnl_obj_get(obj, attr);
203 return ret == NULL ? 0 : *((uint16_t *)ret);
206 EXPORT_SYMBOL(nftnl_obj_get_u32);
207 uint32_t nftnl_obj_get_u32(
struct nftnl_obj *obj, uint16_t attr)
209 const void *ret = nftnl_obj_get(obj, attr);
210 return ret == NULL ? 0 : *((uint32_t *)ret);
213 EXPORT_SYMBOL(nftnl_obj_get_u64);
214 uint64_t nftnl_obj_get_u64(
struct nftnl_obj *obj, uint16_t attr)
216 const void *ret = nftnl_obj_get(obj, attr);
217 return ret == NULL ? 0 : *((uint64_t *)ret);
220 EXPORT_SYMBOL(nftnl_obj_get_str);
221 const char *nftnl_obj_get_str(
struct nftnl_obj *obj, uint16_t attr)
223 return nftnl_obj_get(obj, attr);
226 EXPORT_SYMBOL(nftnl_obj_nlmsg_build_payload);
227 void nftnl_obj_nlmsg_build_payload(
struct nlmsghdr *nlh,
228 const struct nftnl_obj *obj)
230 if (obj->flags & (1 << NFTNL_OBJ_TABLE))
231 mnl_attr_put_strz(nlh, NFTA_OBJ_TABLE, obj->table);
232 if (obj->flags & (1 << NFTNL_OBJ_NAME))
233 mnl_attr_put_strz(nlh, NFTA_OBJ_NAME, obj->name);
234 if (obj->flags & (1 << NFTNL_OBJ_TYPE))
235 mnl_attr_put_u32(nlh, NFTA_OBJ_TYPE, htonl(obj->ops->type));
236 if (obj->flags & (1 << NFTNL_OBJ_HANDLE))
237 mnl_attr_put_u64(nlh, NFTA_OBJ_HANDLE, htobe64(obj->handle));
239 struct nlattr *nest = mnl_attr_nest_start(nlh, NFTA_OBJ_DATA);
241 obj->ops->build(nlh, obj);
242 mnl_attr_nest_end(nlh, nest);
246 static int nftnl_obj_parse_attr_cb(
const struct nlattr *attr,
void *data)
248 const struct nlattr **tb = data;
249 int type = mnl_attr_get_type(attr);
251 if (mnl_attr_type_valid(attr, NFTA_OBJ_MAX) < 0)
257 if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
260 case NFTA_OBJ_HANDLE:
261 if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
265 if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0)
269 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
278 EXPORT_SYMBOL(nftnl_obj_nlmsg_parse);
279 int nftnl_obj_nlmsg_parse(
const struct nlmsghdr *nlh,
struct nftnl_obj *obj)
281 struct nfgenmsg *nfg = mnl_nlmsg_get_payload(nlh);
282 struct nlattr *tb[NFTA_OBJ_MAX + 1] = {};
285 if (mnl_attr_parse(nlh,
sizeof(*nfg), nftnl_obj_parse_attr_cb, tb) < 0)
288 if (tb[NFTA_OBJ_TABLE]) {
289 obj->table = strdup(mnl_attr_get_str(tb[NFTA_OBJ_TABLE]));
290 obj->flags |= (1 << NFTNL_OBJ_TABLE);
292 if (tb[NFTA_OBJ_NAME]) {
293 obj->name = strdup(mnl_attr_get_str(tb[NFTA_OBJ_NAME]));
294 obj->flags |= (1 << NFTNL_OBJ_NAME);
296 if (tb[NFTA_OBJ_TYPE]) {
297 uint32_t type = ntohl(mnl_attr_get_u32(tb[NFTA_OBJ_TYPE]));
299 obj->ops = nftnl_obj_ops_lookup(type);
301 obj->flags |= (1 << NFTNL_OBJ_TYPE);
303 if (tb[NFTA_OBJ_DATA]) {
305 err = obj->ops->parse(obj, tb[NFTA_OBJ_DATA]);
310 if (tb[NFTA_OBJ_USE]) {
311 obj->use = ntohl(mnl_attr_get_u32(tb[NFTA_OBJ_USE]));
312 obj->flags |= (1 << NFTNL_OBJ_USE);
314 if (tb[NFTA_OBJ_HANDLE]) {
315 obj->handle = be64toh(mnl_attr_get_u64(tb[NFTA_OBJ_HANDLE]));
316 obj->flags |= (1 << NFTNL_OBJ_HANDLE);
319 obj->family = nfg->nfgen_family;
320 obj->flags |= (1 << NFTNL_OBJ_FAMILY);
325 static int nftnl_obj_do_parse(
struct nftnl_obj *obj,
enum nftnl_parse_type type,
326 const void *data,
struct nftnl_parse_err *err,
327 enum nftnl_parse_input input)
329 struct nftnl_parse_err perr = {};
333 case NFTNL_PARSE_JSON:
334 case NFTNL_PARSE_XML:
347 EXPORT_SYMBOL(nftnl_obj_parse);
348 int nftnl_obj_parse(
struct nftnl_obj *obj,
enum nftnl_parse_type type,
349 const char *data,
struct nftnl_parse_err *err)
351 return nftnl_obj_do_parse(obj, type, data, err, NFTNL_PARSE_BUFFER);
354 EXPORT_SYMBOL(nftnl_obj_parse_file);
355 int nftnl_obj_parse_file(
struct nftnl_obj *obj,
enum nftnl_parse_type type,
356 FILE *fp,
struct nftnl_parse_err *err)
358 return nftnl_obj_do_parse(obj, type, fp, err, NFTNL_PARSE_FILE);
361 static int nftnl_obj_snprintf_dflt(
char *buf,
size_t size,
362 const struct nftnl_obj *obj,
363 uint32_t type, uint32_t flags)
365 const char *name = obj->ops ? obj->ops->name :
"(unknown)";
366 int ret, remain = size, offset = 0;
368 ret = snprintf(buf, size,
"table %s name %s use %u [ %s ",
369 obj->table, obj->name, obj->use, name);
370 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
373 ret = obj->ops->snprintf(buf + offset, offset, type, flags,
375 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
377 ret = snprintf(buf + offset, offset,
"]");
378 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
383 static int nftnl_obj_cmd_snprintf(
char *buf,
size_t size,
384 const struct nftnl_obj *obj, uint32_t cmd,
385 uint32_t type, uint32_t flags)
387 int ret, remain = size, offset = 0;
390 case NFTNL_OUTPUT_DEFAULT:
391 ret = nftnl_obj_snprintf_dflt(buf + offset, remain, obj, type,
394 case NFTNL_OUTPUT_JSON:
395 case NFTNL_OUTPUT_XML:
399 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
404 EXPORT_SYMBOL(nftnl_obj_snprintf);
405 int nftnl_obj_snprintf(
char *buf,
size_t size,
const struct nftnl_obj *obj,
406 uint32_t type, uint32_t flags)
411 return nftnl_obj_cmd_snprintf(buf, size, obj, nftnl_flag2cmd(flags),
415 static int nftnl_obj_do_snprintf(
char *buf,
size_t size,
const void *obj,
416 uint32_t cmd, uint32_t type, uint32_t flags)
418 return nftnl_obj_snprintf(buf, size, obj, type, flags);
421 EXPORT_SYMBOL(nftnl_obj_fprintf);
422 int nftnl_obj_fprintf(FILE *fp,
const struct nftnl_obj *obj, uint32_t type,
425 return nftnl_fprintf(fp, obj, NFTNL_CMD_UNSPEC, type, flags,
426 nftnl_obj_do_snprintf);
430 struct list_head list;
433 EXPORT_SYMBOL(nftnl_obj_list_alloc);
442 INIT_LIST_HEAD(&list->list);
447 EXPORT_SYMBOL(nftnl_obj_list_free);
450 struct nftnl_obj *r, *tmp;
452 list_for_each_entry_safe(r, tmp, &list->list, head) {
459 EXPORT_SYMBOL(nftnl_obj_list_is_empty);
462 return list_empty(&list->list);
465 EXPORT_SYMBOL(nftnl_obj_list_add);
466 void nftnl_obj_list_add(
struct nftnl_obj *r,
struct nftnl_obj_list *list)
468 list_add(&r->head, &list->list);
471 EXPORT_SYMBOL(nftnl_obj_list_add_tail);
472 void nftnl_obj_list_add_tail(
struct nftnl_obj *r,
475 list_add_tail(&r->head, &list->list);
478 EXPORT_SYMBOL(nftnl_obj_list_del);
479 void nftnl_obj_list_del(
struct nftnl_obj *t)
484 EXPORT_SYMBOL(nftnl_obj_list_foreach);
486 int (*cb)(
struct nftnl_obj *t,
void *data),
489 struct nftnl_obj *cur, *tmp;
492 list_for_each_entry_safe(cur, tmp, &table_list->list, head) {
502 struct nftnl_obj *cur;
505 EXPORT_SYMBOL(nftnl_obj_list_iter_create);
516 if (nftnl_obj_list_is_empty(l))
519 iter->cur = list_entry(l->list.next,
struct nftnl_obj, head);
524 EXPORT_SYMBOL(nftnl_obj_list_iter_next);
527 struct nftnl_obj *r = iter->cur;
533 iter->cur = list_entry(iter->cur->head.next,
struct nftnl_obj, head);
534 if (&iter->cur->head == iter->list->list.next)
540 EXPORT_SYMBOL(nftnl_obj_list_iter_destroy);