19 #include <netinet/in.h> 22 #include <libmnl/libmnl.h> 23 #include <linux/netfilter/nfnetlink.h> 24 #include <linux/netfilter/nf_tables.h> 26 #include <libnftnl/table.h> 29 struct list_head head;
43 EXPORT_SYMBOL(nftnl_table_alloc);
49 EXPORT_SYMBOL(nftnl_table_free);
52 if (t->flags & (1 << NFTNL_TABLE_NAME))
54 if (t->flags & (1 << NFTNL_TABLE_USERDATA))
60 EXPORT_SYMBOL(nftnl_table_is_set);
61 bool nftnl_table_is_set(
const struct nftnl_table *t, uint16_t attr)
63 return t->flags & (1 << attr);
66 EXPORT_SYMBOL(nftnl_table_unset);
67 void nftnl_table_unset(
struct nftnl_table *t, uint16_t attr)
69 if (!(t->flags & (1 << attr)))
73 case NFTNL_TABLE_NAME:
76 case NFTNL_TABLE_FLAGS:
77 case NFTNL_TABLE_HANDLE:
78 case NFTNL_TABLE_FAMILY:
83 t->flags &= ~(1 << attr);
86 static uint32_t nftnl_table_validate[NFTNL_TABLE_MAX + 1] = {
87 [NFTNL_TABLE_FLAGS] =
sizeof(uint32_t),
88 [NFTNL_TABLE_FAMILY] =
sizeof(uint32_t),
89 [NFTNL_TABLE_HANDLE] =
sizeof(uint64_t),
92 EXPORT_SYMBOL(nftnl_table_set_data);
93 int nftnl_table_set_data(
struct nftnl_table *t, uint16_t attr,
94 const void *data, uint32_t data_len)
96 nftnl_assert_attr_exists(attr, NFTNL_TABLE_MAX);
97 nftnl_assert_validate(data, nftnl_table_validate, attr, data_len);
100 case NFTNL_TABLE_NAME:
101 if (t->flags & (1 << NFTNL_TABLE_NAME))
104 t->name = strdup(data);
108 case NFTNL_TABLE_HANDLE:
109 memcpy(&t->handle, data,
sizeof(t->handle));
111 case NFTNL_TABLE_FLAGS:
112 memcpy(&t->table_flags, data,
sizeof(t->table_flags));
114 case NFTNL_TABLE_FAMILY:
115 memcpy(&t->family, data,
sizeof(t->family));
117 case NFTNL_TABLE_USE:
118 memcpy(&t->use, data,
sizeof(t->use));
120 case NFTNL_TABLE_USERDATA:
121 if (t->flags & (1 << NFTNL_TABLE_USERDATA))
124 t->user.data = malloc(data_len);
127 memcpy(t->user.data, data, data_len);
128 t->user.len = data_len;
131 t->flags |= (1 << attr);
135 void nftnl_table_set(
struct nftnl_table *t, uint16_t attr,
const void *data) __visible;
136 void nftnl_table_set(
struct nftnl_table *t, uint16_t attr,
const void *data)
138 nftnl_table_set_data(t, attr, data, nftnl_table_validate[attr]);
141 EXPORT_SYMBOL(nftnl_table_set_u32);
142 void nftnl_table_set_u32(
struct nftnl_table *t, uint16_t attr, uint32_t val)
144 nftnl_table_set_data(t, attr, &val,
sizeof(uint32_t));
147 EXPORT_SYMBOL(nftnl_table_set_u64);
148 void nftnl_table_set_u64(
struct nftnl_table *t, uint16_t attr, uint64_t val)
150 nftnl_table_set_data(t, attr, &val,
sizeof(uint64_t));
153 EXPORT_SYMBOL(nftnl_table_set_u8);
154 void nftnl_table_set_u8(
struct nftnl_table *t, uint16_t attr, uint8_t val)
156 nftnl_table_set_data(t, attr, &val,
sizeof(uint8_t));
159 EXPORT_SYMBOL(nftnl_table_set_str);
160 int nftnl_table_set_str(
struct nftnl_table *t, uint16_t attr,
const char *str)
162 return nftnl_table_set_data(t, attr, str, strlen(str) + 1);
165 EXPORT_SYMBOL(nftnl_table_get_data);
166 const void *nftnl_table_get_data(
const struct nftnl_table *t, uint16_t attr,
169 if (!(t->flags & (1 << attr)))
173 case NFTNL_TABLE_NAME:
174 *data_len = strlen(t->name) + 1;
176 case NFTNL_TABLE_HANDLE:
177 *data_len =
sizeof(uint64_t);
179 case NFTNL_TABLE_FLAGS:
180 *data_len =
sizeof(uint32_t);
181 return &t->table_flags;
182 case NFTNL_TABLE_FAMILY:
183 *data_len =
sizeof(uint32_t);
185 case NFTNL_TABLE_USE:
186 *data_len =
sizeof(uint32_t);
188 case NFTNL_TABLE_USERDATA:
189 *data_len = t->user.len;
195 EXPORT_SYMBOL(nftnl_table_get);
196 const void *nftnl_table_get(
const struct nftnl_table *t, uint16_t attr)
199 return nftnl_table_get_data(t, attr, &data_len);
202 EXPORT_SYMBOL(nftnl_table_get_u32);
203 uint32_t nftnl_table_get_u32(
const struct nftnl_table *t, uint16_t attr)
205 const void *ret = nftnl_table_get(t, attr);
206 return ret == NULL ? 0 : *((uint32_t *)ret);
209 EXPORT_SYMBOL(nftnl_table_get_u64);
210 uint64_t nftnl_table_get_u64(
const struct nftnl_table *t, uint16_t attr)
212 const void *ret = nftnl_table_get(t, attr);
213 return ret == NULL ? 0 : *((uint64_t *)ret);
216 EXPORT_SYMBOL(nftnl_table_get_u8);
217 uint8_t nftnl_table_get_u8(
const struct nftnl_table *t, uint16_t attr)
219 const void *ret = nftnl_table_get(t, attr);
220 return ret == NULL ? 0 : *((uint8_t *)ret);
223 EXPORT_SYMBOL(nftnl_table_get_str);
224 const char *nftnl_table_get_str(
const struct nftnl_table *t, uint16_t attr)
226 return nftnl_table_get(t, attr);
229 EXPORT_SYMBOL(nftnl_table_nlmsg_build_payload);
230 void nftnl_table_nlmsg_build_payload(
struct nlmsghdr *nlh,
const struct nftnl_table *t)
232 if (t->flags & (1 << NFTNL_TABLE_NAME))
233 mnl_attr_put_strz(nlh, NFTA_TABLE_NAME, t->name);
234 if (t->flags & (1 << NFTNL_TABLE_HANDLE))
235 mnl_attr_put_u64(nlh, NFTA_TABLE_HANDLE, htobe64(t->handle));
236 if (t->flags & (1 << NFTNL_TABLE_FLAGS))
237 mnl_attr_put_u32(nlh, NFTA_TABLE_FLAGS, htonl(t->table_flags));
238 if (t->flags & (1 << NFTNL_TABLE_USERDATA))
239 mnl_attr_put(nlh, NFTA_TABLE_USERDATA, t->user.len, t->user.data);
242 static int nftnl_table_parse_attr_cb(
const struct nlattr *attr,
void *data)
244 const struct nlattr **tb = data;
245 int type = mnl_attr_get_type(attr);
247 if (mnl_attr_type_valid(attr, NFTA_TABLE_MAX) < 0)
251 case NFTA_TABLE_NAME:
252 if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
255 case NFTA_TABLE_HANDLE:
256 if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
259 case NFTA_TABLE_FLAGS:
261 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
264 case NFTA_TABLE_USERDATA:
265 if (mnl_attr_validate(attr, MNL_TYPE_BINARY) < 0)
274 EXPORT_SYMBOL(nftnl_table_nlmsg_parse);
275 int nftnl_table_nlmsg_parse(
const struct nlmsghdr *nlh,
struct nftnl_table *t)
277 struct nlattr *tb[NFTA_TABLE_MAX+1] = {};
278 struct nfgenmsg *nfg = mnl_nlmsg_get_payload(nlh);
281 if (mnl_attr_parse(nlh,
sizeof(*nfg), nftnl_table_parse_attr_cb, tb) < 0)
284 if (tb[NFTA_TABLE_NAME]) {
285 if (t->flags & (1 << NFTNL_TABLE_NAME))
287 t->name = strdup(mnl_attr_get_str(tb[NFTA_TABLE_NAME]));
290 t->flags |= (1 << NFTNL_TABLE_NAME);
292 if (tb[NFTA_TABLE_FLAGS]) {
293 t->table_flags = ntohl(mnl_attr_get_u32(tb[NFTA_TABLE_FLAGS]));
294 t->flags |= (1 << NFTNL_TABLE_FLAGS);
296 if (tb[NFTA_TABLE_USE]) {
297 t->use = ntohl(mnl_attr_get_u32(tb[NFTA_TABLE_USE]));
298 t->flags |= (1 << NFTNL_TABLE_USE);
300 if (tb[NFTA_TABLE_HANDLE]) {
301 t->handle = be64toh(mnl_attr_get_u64(tb[NFTA_TABLE_HANDLE]));
302 t->flags |= (1 << NFTNL_TABLE_HANDLE);
304 if (tb[NFTA_TABLE_USERDATA]) {
305 ret = nftnl_table_set_data(t, NFTNL_TABLE_USERDATA,
306 mnl_attr_get_payload(tb[NFTA_TABLE_USERDATA]),
307 mnl_attr_get_payload_len(tb[NFTA_TABLE_USERDATA]));
312 t->family = nfg->nfgen_family;
313 t->flags |= (1 << NFTNL_TABLE_FAMILY);
318 static int nftnl_table_do_parse(
struct nftnl_table *t,
enum nftnl_parse_type type,
319 const void *data,
struct nftnl_parse_err *err,
320 enum nftnl_parse_input input)
325 case NFTNL_PARSE_JSON:
326 case NFTNL_PARSE_XML:
336 EXPORT_SYMBOL(nftnl_table_parse);
337 int nftnl_table_parse(
struct nftnl_table *t,
enum nftnl_parse_type type,
338 const char *data,
struct nftnl_parse_err *err)
340 return nftnl_table_do_parse(t, type, data, err, NFTNL_PARSE_BUFFER);
343 EXPORT_SYMBOL(nftnl_table_parse_file);
344 int nftnl_table_parse_file(
struct nftnl_table *t,
enum nftnl_parse_type type,
345 FILE *fp,
struct nftnl_parse_err *err)
347 return nftnl_table_do_parse(t, type, fp, err, NFTNL_PARSE_FILE);
350 static int nftnl_table_snprintf_default(
char *buf,
size_t size,
353 return snprintf(buf, size,
"table %s %s flags %x use %d handle %llu",
354 t->name, nftnl_family2str(t->family),
355 t->table_flags, t->use, (
unsigned long long)t->handle);
358 static int nftnl_table_cmd_snprintf(
char *buf,
size_t size,
360 uint32_t type, uint32_t flags)
362 int ret, remain = size, offset = 0;
365 case NFTNL_OUTPUT_DEFAULT:
366 ret = nftnl_table_snprintf_default(buf + offset, remain, t);
367 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
369 case NFTNL_OUTPUT_XML:
370 case NFTNL_OUTPUT_JSON:
378 EXPORT_SYMBOL(nftnl_table_snprintf);
379 int nftnl_table_snprintf(
char *buf,
size_t size,
const struct nftnl_table *t,
380 uint32_t type, uint32_t flags)
385 return nftnl_table_cmd_snprintf(buf, size, t, nftnl_flag2cmd(flags), type,
389 static int nftnl_table_do_snprintf(
char *buf,
size_t size,
const void *t,
390 uint32_t cmd, uint32_t type, uint32_t flags)
392 return nftnl_table_snprintf(buf, size, t, type, flags);
395 EXPORT_SYMBOL(nftnl_table_fprintf);
396 int nftnl_table_fprintf(FILE *fp,
const struct nftnl_table *t, uint32_t type,
399 return nftnl_fprintf(fp, t, NFTNL_CMD_UNSPEC, type, flags,
400 nftnl_table_do_snprintf);
404 struct list_head list;
407 EXPORT_SYMBOL(nftnl_table_list_alloc);
416 INIT_LIST_HEAD(&list->list);
421 EXPORT_SYMBOL(nftnl_table_list_free);
426 list_for_each_entry_safe(r, tmp, &list->list, head) {
433 EXPORT_SYMBOL(nftnl_table_list_is_empty);
436 return list_empty(&list->list);
439 EXPORT_SYMBOL(nftnl_table_list_add);
442 list_add(&r->head, &list->list);
445 EXPORT_SYMBOL(nftnl_table_list_add_tail);
448 list_add_tail(&r->head, &list->list);
451 EXPORT_SYMBOL(nftnl_table_list_del);
457 EXPORT_SYMBOL(nftnl_table_list_foreach);
465 list_for_each_entry_safe(cur, tmp, &table_list->list, head) {
478 EXPORT_SYMBOL(nftnl_table_list_iter_create);
489 if (nftnl_table_list_is_empty(l))
492 iter->cur = list_entry(l->list.next,
struct nftnl_table, head);
497 EXPORT_SYMBOL(nftnl_table_list_iter_next);
506 iter->cur = list_entry(iter->cur->head.next,
struct nftnl_table, head);
507 if (&iter->cur->head == iter->list->list.next)
513 EXPORT_SYMBOL(nftnl_table_list_iter_destroy);