16#include <linux/netfilter/nf_tables.h>
19#include <libmnl/libmnl.h>
20#include <libnftnl/object.h>
24static const char *
const tcp_state_to_name[] = {
25 [NFTNL_CTTIMEOUT_TCP_SYN_SENT] =
"SYN_SENT",
26 [NFTNL_CTTIMEOUT_TCP_SYN_RECV] =
"SYN_RECV",
27 [NFTNL_CTTIMEOUT_TCP_ESTABLISHED] =
"ESTABLISHED",
28 [NFTNL_CTTIMEOUT_TCP_FIN_WAIT] =
"FIN_WAIT",
29 [NFTNL_CTTIMEOUT_TCP_CLOSE_WAIT] =
"CLOSE_WAIT",
30 [NFTNL_CTTIMEOUT_TCP_LAST_ACK] =
"LAST_ACK",
31 [NFTNL_CTTIMEOUT_TCP_TIME_WAIT] =
"TIME_WAIT",
32 [NFTNL_CTTIMEOUT_TCP_CLOSE] =
"CLOSE",
33 [NFTNL_CTTIMEOUT_TCP_SYN_SENT2] =
"SYN_SENT2",
34 [NFTNL_CTTIMEOUT_TCP_RETRANS] =
"RETRANS",
35 [NFTNL_CTTIMEOUT_TCP_UNACK] =
"UNACKNOWLEDGED",
38static uint32_t tcp_dflt_timeout[] = {
39 [NFTNL_CTTIMEOUT_TCP_SYN_SENT] = 120,
40 [NFTNL_CTTIMEOUT_TCP_SYN_RECV] = 60,
41 [NFTNL_CTTIMEOUT_TCP_ESTABLISHED] = 432000,
42 [NFTNL_CTTIMEOUT_TCP_FIN_WAIT] = 120,
43 [NFTNL_CTTIMEOUT_TCP_CLOSE_WAIT] = 60,
44 [NFTNL_CTTIMEOUT_TCP_LAST_ACK] = 30,
45 [NFTNL_CTTIMEOUT_TCP_TIME_WAIT] = 120,
46 [NFTNL_CTTIMEOUT_TCP_CLOSE] = 10,
47 [NFTNL_CTTIMEOUT_TCP_SYN_SENT2] = 120,
48 [NFTNL_CTTIMEOUT_TCP_RETRANS] = 300,
49 [NFTNL_CTTIMEOUT_TCP_UNACK] = 300,
52static const char *
const udp_state_to_name[] = {
53 [NFTNL_CTTIMEOUT_UDP_UNREPLIED] =
"UNREPLIED",
54 [NFTNL_CTTIMEOUT_UDP_REPLIED] =
"REPLIED",
57static uint32_t udp_dflt_timeout[] = {
58 [NFTNL_CTTIMEOUT_UDP_UNREPLIED] = 30,
59 [NFTNL_CTTIMEOUT_UDP_REPLIED] = 180,
64 const char *
const *state_to_name;
65 uint32_t *dflt_timeout;
66} timeout_protocol[IPPROTO_MAX] = {
68 .attr_max = NFTNL_CTTIMEOUT_TCP_MAX,
69 .state_to_name = tcp_state_to_name,
70 .dflt_timeout = tcp_dflt_timeout,
73 .attr_max = NFTNL_CTTIMEOUT_UDP_MAX,
74 .state_to_name = udp_state_to_name,
75 .dflt_timeout = udp_dflt_timeout,
80 unsigned int nlattr_max;
85nftnl_timeout_policy_attr_set_u32(
struct nftnl_obj *e,
86 uint32_t type, uint32_t data)
88 struct nftnl_obj_ct_timeout *t = nftnl_obj_data(e);
90 if (type >= NFTNL_CTTIMEOUT_ARRAY_MAX)
93 t->timeout[type] = data;
95 if (!(e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_ARRAY)))
96 e->flags |= (1 << NFTNL_OBJ_CT_TIMEOUT_ARRAY);
102parse_timeout_attr_policy_cb(
const struct nlattr *attr,
void *data)
105 const struct nlattr **tb = data_cb->tb;
106 uint16_t type = mnl_attr_get_type(attr);
108 if (mnl_attr_type_valid(attr, data_cb->nlattr_max) < 0)
111 if (type > 0 && type <= data_cb->nlattr_max) {
112 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
120timeout_parse_attr_data(
struct nftnl_obj *e,
121 const struct nlattr *nest)
123 struct nftnl_obj_ct_timeout *t = nftnl_obj_data(e);
124 unsigned int attr_max = timeout_protocol[t->l4proto].attr_max;
125 struct nlattr *tb[attr_max];
127 .nlattr_max = attr_max,
132 memset(tb, 0,
sizeof(
struct nlattr *) * attr_max);
134 if (mnl_attr_parse_nested(nest, parse_timeout_attr_policy_cb, &cnt) < 0)
137 for (i = 0; i < array_size(tb); i++) {
139 nftnl_timeout_policy_attr_set_u32(e, i,
140 ntohl(mnl_attr_get_u32(tb[i])));
146static int nftnl_obj_ct_timeout_set(
struct nftnl_obj *e, uint16_t type,
147 const void *data, uint32_t data_len)
149 struct nftnl_obj_ct_timeout *timeout = nftnl_obj_data(e);
152 case NFTNL_OBJ_CT_TIMEOUT_L3PROTO:
153 memcpy(&timeout->l3proto, data,
sizeof(timeout->l3proto));
155 case NFTNL_OBJ_CT_TIMEOUT_L4PROTO:
156 memcpy(&timeout->l4proto, data,
sizeof(timeout->l4proto));
158 case NFTNL_OBJ_CT_TIMEOUT_ARRAY:
159 memcpy(timeout->timeout, data,
160 sizeof(uint32_t) * NFTNL_CTTIMEOUT_ARRAY_MAX);
168static const void *nftnl_obj_ct_timeout_get(
const struct nftnl_obj *e,
169 uint16_t type, uint32_t *data_len)
171 struct nftnl_obj_ct_timeout *timeout = nftnl_obj_data(e);
174 case NFTNL_OBJ_CT_TIMEOUT_L3PROTO:
175 *data_len =
sizeof(timeout->l3proto);
176 return &timeout->l3proto;
177 case NFTNL_OBJ_CT_TIMEOUT_L4PROTO:
178 *data_len =
sizeof(timeout->l4proto);
179 return &timeout->l4proto;
180 case NFTNL_OBJ_CT_TIMEOUT_ARRAY:
181 *data_len =
sizeof(uint32_t) * NFTNL_CTTIMEOUT_ARRAY_MAX;
182 return timeout->timeout;
187static int nftnl_obj_ct_timeout_cb(
const struct nlattr *attr,
void *data)
189 int type = mnl_attr_get_type(attr);
190 const struct nlattr **tb = data;
192 if (mnl_attr_type_valid(attr, NFTA_CT_TIMEOUT_MAX) < 0)
196 case NFTA_CT_TIMEOUT_L3PROTO:
197 if (mnl_attr_validate(attr, MNL_TYPE_U16) < 0)
200 case NFTA_CT_TIMEOUT_L4PROTO:
201 if (mnl_attr_validate(attr, MNL_TYPE_U8) < 0)
204 case NFTA_CT_TIMEOUT_DATA:
205 if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0)
215nftnl_obj_ct_timeout_build(
struct nlmsghdr *nlh,
const struct nftnl_obj *e)
217 struct nftnl_obj_ct_timeout *timeout = nftnl_obj_data(e);
220 if (e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_L3PROTO))
221 mnl_attr_put_u16(nlh, NFTA_CT_TIMEOUT_L3PROTO, htons(timeout->l3proto));
222 if (e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_L4PROTO))
223 mnl_attr_put_u8(nlh, NFTA_CT_TIMEOUT_L4PROTO, timeout->l4proto);
224 if (e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_ARRAY)) {
227 nest = mnl_attr_nest_start(nlh, NFTA_CT_TIMEOUT_DATA);
228 for (i = 0; i < timeout_protocol[timeout->l4proto].attr_max; i++)
229 mnl_attr_put_u32(nlh, i+1, htonl(timeout->timeout[i]));
231 mnl_attr_nest_end(nlh, nest);
236nftnl_obj_ct_timeout_parse(
struct nftnl_obj *e,
struct nlattr *attr)
238 struct nftnl_obj_ct_timeout *timeout = nftnl_obj_data(e);
239 struct nlattr *tb[NFTA_CT_TIMEOUT_MAX + 1] = {};
241 if (mnl_attr_parse_nested(attr, nftnl_obj_ct_timeout_cb, tb) < 0)
244 if (tb[NFTA_CT_TIMEOUT_L3PROTO]) {
245 timeout->l3proto = ntohs(mnl_attr_get_u16(tb[NFTA_CT_TIMEOUT_L3PROTO]));
246 e->flags |= (1 << NFTNL_OBJ_CT_TIMEOUT_L3PROTO);
248 if (tb[NFTA_CT_TIMEOUT_L4PROTO]) {
249 timeout->l4proto = mnl_attr_get_u8(tb[NFTA_CT_TIMEOUT_L4PROTO]);
250 e->flags |= (1 << NFTNL_OBJ_CT_TIMEOUT_L4PROTO);
252 if (tb[NFTA_CT_TIMEOUT_DATA]) {
253 if (timeout_parse_attr_data(e, tb[NFTA_CT_TIMEOUT_DATA]) < 0)
255 e->flags |= (1 << NFTNL_OBJ_CT_TIMEOUT_ARRAY);
260static int nftnl_obj_ct_timeout_snprintf(
char *buf,
size_t remain,
262 const struct nftnl_obj *e)
264 int ret = 0, offset = 0;
266 struct nftnl_obj_ct_timeout *timeout = nftnl_obj_data(e);
268 if (e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_L3PROTO)) {
269 ret = snprintf(buf + offset, remain,
"family %d ",
271 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
273 if (e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_L4PROTO)) {
274 ret = snprintf(buf + offset, remain,
"protocol %d ",
276 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
278 if (e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_ARRAY)) {
279 uint8_t l4num = timeout->l4proto;
283 if (timeout_protocol[timeout->l4proto].attr_max == 0)
286 ret = snprintf(buf + offset, remain,
"policy = {");
287 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
289 for (i = 0; i < timeout_protocol[l4num].attr_max; i++) {
290 const char *state_name =
291 timeout_protocol[l4num].state_to_name[i][0] ?
292 timeout_protocol[l4num].state_to_name[i] :
295 if (timeout->timeout[i] != timeout_protocol[l4num].dflt_timeout[i]) {
296 ret = snprintf(buf + offset, remain,
297 "%s = %u,", state_name, timeout->timeout[i]);
298 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
302 ret = snprintf(buf + offset, remain,
"}");
303 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
310struct obj_ops obj_ops_ct_timeout = {
311 .name =
"ct_timeout",
312 .type = NFT_OBJECT_CT_TIMEOUT,
313 .alloc_len =
sizeof(
struct nftnl_obj_ct_timeout),
314 .max_attr = NFTA_CT_TIMEOUT_MAX,
315 .set = nftnl_obj_ct_timeout_set,
316 .get = nftnl_obj_ct_timeout_get,
317 .parse = nftnl_obj_ct_timeout_parse,
318 .build = nftnl_obj_ct_timeout_build,
319 .output = nftnl_obj_ct_timeout_snprintf,