12#include <linux/netfilter/nf_tables.h>
15#include <libmnl/libmnl.h>
16#include <libnftnl/object.h>
20static const char *
const tcp_state_to_name[NFTNL_CTTIMEOUT_TCP_MAX] = {
21 [NFTNL_CTTIMEOUT_TCP_SYN_SENT] =
"SYN_SENT",
22 [NFTNL_CTTIMEOUT_TCP_SYN_RECV] =
"SYN_RECV",
23 [NFTNL_CTTIMEOUT_TCP_ESTABLISHED] =
"ESTABLISHED",
24 [NFTNL_CTTIMEOUT_TCP_FIN_WAIT] =
"FIN_WAIT",
25 [NFTNL_CTTIMEOUT_TCP_CLOSE_WAIT] =
"CLOSE_WAIT",
26 [NFTNL_CTTIMEOUT_TCP_LAST_ACK] =
"LAST_ACK",
27 [NFTNL_CTTIMEOUT_TCP_TIME_WAIT] =
"TIME_WAIT",
28 [NFTNL_CTTIMEOUT_TCP_CLOSE] =
"CLOSE",
29 [NFTNL_CTTIMEOUT_TCP_SYN_SENT2] =
"SYN_SENT2",
30 [NFTNL_CTTIMEOUT_TCP_RETRANS] =
"RETRANS",
31 [NFTNL_CTTIMEOUT_TCP_UNACK] =
"UNACKNOWLEDGED",
34static uint32_t tcp_dflt_timeout[NFTNL_CTTIMEOUT_TCP_MAX] = {
35 [NFTNL_CTTIMEOUT_TCP_SYN_SENT] = 120,
36 [NFTNL_CTTIMEOUT_TCP_SYN_RECV] = 60,
37 [NFTNL_CTTIMEOUT_TCP_ESTABLISHED] = 432000,
38 [NFTNL_CTTIMEOUT_TCP_FIN_WAIT] = 120,
39 [NFTNL_CTTIMEOUT_TCP_CLOSE_WAIT] = 60,
40 [NFTNL_CTTIMEOUT_TCP_LAST_ACK] = 30,
41 [NFTNL_CTTIMEOUT_TCP_TIME_WAIT] = 120,
42 [NFTNL_CTTIMEOUT_TCP_CLOSE] = 10,
43 [NFTNL_CTTIMEOUT_TCP_SYN_SENT2] = 120,
44 [NFTNL_CTTIMEOUT_TCP_RETRANS] = 300,
45 [NFTNL_CTTIMEOUT_TCP_UNACK] = 300,
48static const char *
const udp_state_to_name[NFTNL_CTTIMEOUT_UDP_MAX] = {
49 [NFTNL_CTTIMEOUT_UDP_UNREPLIED] =
"UNREPLIED",
50 [NFTNL_CTTIMEOUT_UDP_REPLIED] =
"REPLIED",
53static uint32_t udp_dflt_timeout[NFTNL_CTTIMEOUT_UDP_MAX] = {
54 [NFTNL_CTTIMEOUT_UDP_UNREPLIED] = 30,
55 [NFTNL_CTTIMEOUT_UDP_REPLIED] = 180,
60 const char *
const *state_to_name;
61 uint32_t *dflt_timeout;
62} timeout_protocol[IPPROTO_MAX] = {
64 .attr_max = NFTNL_CTTIMEOUT_TCP_MAX,
65 .state_to_name = tcp_state_to_name,
66 .dflt_timeout = tcp_dflt_timeout,
69 .attr_max = NFTNL_CTTIMEOUT_UDP_MAX,
70 .state_to_name = udp_state_to_name,
71 .dflt_timeout = udp_dflt_timeout,
76 unsigned int nlattr_max;
81nftnl_timeout_policy_attr_set_u32(
struct nftnl_obj *e,
82 uint32_t type, uint32_t data)
84 struct nftnl_obj_ct_timeout *t = nftnl_obj_data(e);
86 if (type >= NFTNL_CTTIMEOUT_ARRAY_MAX)
89 t->timeout[type] = data;
91 if (!(e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_ARRAY)))
92 e->flags |= (1 << NFTNL_OBJ_CT_TIMEOUT_ARRAY);
98parse_timeout_attr_policy_cb(
const struct nlattr *attr,
void *data)
101 const struct nlattr **tb = data_cb->tb;
102 uint16_t type = mnl_attr_get_type(attr);
104 if (mnl_attr_type_valid(attr, data_cb->nlattr_max) < 0)
107 if (type > 0 && type <= data_cb->nlattr_max) {
108 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
116timeout_parse_attr_data(
struct nftnl_obj *e,
117 const struct nlattr *nest)
119 struct nftnl_obj_ct_timeout *t = nftnl_obj_data(e);
120 unsigned int attr_max = timeout_protocol[t->l4proto].attr_max;
121 struct nlattr *tb[attr_max];
123 .nlattr_max = attr_max,
128 memset(tb, 0,
sizeof(
struct nlattr *) * attr_max);
130 if (mnl_attr_parse_nested(nest, parse_timeout_attr_policy_cb, &cnt) < 0)
133 for (i = 0; i < array_size(tb); i++) {
135 nftnl_timeout_policy_attr_set_u32(e, i,
136 ntohl(mnl_attr_get_u32(tb[i])));
142static int nftnl_obj_ct_timeout_set(
struct nftnl_obj *e, uint16_t type,
143 const void *data, uint32_t data_len)
145 struct nftnl_obj_ct_timeout *timeout = nftnl_obj_data(e);
148 case NFTNL_OBJ_CT_TIMEOUT_L3PROTO:
149 memcpy(&timeout->l3proto, data, data_len);
151 case NFTNL_OBJ_CT_TIMEOUT_L4PROTO:
152 memcpy(&timeout->l4proto, data, data_len);
154 case NFTNL_OBJ_CT_TIMEOUT_ARRAY:
155 if (data_len <
sizeof(uint32_t) * NFTNL_CTTIMEOUT_ARRAY_MAX)
158 memcpy(timeout->timeout, data,
159 sizeof(uint32_t) * NFTNL_CTTIMEOUT_ARRAY_MAX);
165static const void *nftnl_obj_ct_timeout_get(
const struct nftnl_obj *e,
166 uint16_t type, uint32_t *data_len)
168 struct nftnl_obj_ct_timeout *timeout = nftnl_obj_data(e);
171 case NFTNL_OBJ_CT_TIMEOUT_L3PROTO:
172 *data_len =
sizeof(timeout->l3proto);
173 return &timeout->l3proto;
174 case NFTNL_OBJ_CT_TIMEOUT_L4PROTO:
175 *data_len =
sizeof(timeout->l4proto);
176 return &timeout->l4proto;
177 case NFTNL_OBJ_CT_TIMEOUT_ARRAY:
178 *data_len =
sizeof(uint32_t) * NFTNL_CTTIMEOUT_ARRAY_MAX;
179 return timeout->timeout;
184static int nftnl_obj_ct_timeout_cb(
const struct nlattr *attr,
void *data)
186 int type = mnl_attr_get_type(attr);
187 const struct nlattr **tb = data;
189 if (mnl_attr_type_valid(attr, NFTA_CT_TIMEOUT_MAX) < 0)
193 case NFTA_CT_TIMEOUT_L3PROTO:
194 if (mnl_attr_validate(attr, MNL_TYPE_U16) < 0)
197 case NFTA_CT_TIMEOUT_L4PROTO:
198 if (mnl_attr_validate(attr, MNL_TYPE_U8) < 0)
201 case NFTA_CT_TIMEOUT_DATA:
202 if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0)
212nftnl_obj_ct_timeout_build(
struct nlmsghdr *nlh,
const struct nftnl_obj *e)
214 struct nftnl_obj_ct_timeout *timeout = nftnl_obj_data(e);
217 if (e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_L3PROTO))
218 mnl_attr_put_u16(nlh, NFTA_CT_TIMEOUT_L3PROTO, htons(timeout->l3proto));
219 if (e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_L4PROTO))
220 mnl_attr_put_u8(nlh, NFTA_CT_TIMEOUT_L4PROTO, timeout->l4proto);
221 if (e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_ARRAY)) {
224 nest = mnl_attr_nest_start(nlh, NFTA_CT_TIMEOUT_DATA);
225 for (i = 0; i < timeout_protocol[timeout->l4proto].attr_max; i++)
226 mnl_attr_put_u32(nlh, i+1, htonl(timeout->timeout[i]));
228 mnl_attr_nest_end(nlh, nest);
233nftnl_obj_ct_timeout_parse(
struct nftnl_obj *e,
struct nlattr *attr)
235 struct nftnl_obj_ct_timeout *timeout = nftnl_obj_data(e);
236 struct nlattr *tb[NFTA_CT_TIMEOUT_MAX + 1] = {};
238 if (mnl_attr_parse_nested(attr, nftnl_obj_ct_timeout_cb, tb) < 0)
241 if (tb[NFTA_CT_TIMEOUT_L3PROTO]) {
242 timeout->l3proto = ntohs(mnl_attr_get_u16(tb[NFTA_CT_TIMEOUT_L3PROTO]));
243 e->flags |= (1 << NFTNL_OBJ_CT_TIMEOUT_L3PROTO);
245 if (tb[NFTA_CT_TIMEOUT_L4PROTO]) {
246 timeout->l4proto = mnl_attr_get_u8(tb[NFTA_CT_TIMEOUT_L4PROTO]);
247 e->flags |= (1 << NFTNL_OBJ_CT_TIMEOUT_L4PROTO);
249 if (tb[NFTA_CT_TIMEOUT_DATA]) {
250 if (timeout_parse_attr_data(e, tb[NFTA_CT_TIMEOUT_DATA]) < 0)
252 e->flags |= (1 << NFTNL_OBJ_CT_TIMEOUT_ARRAY);
257static int nftnl_obj_ct_timeout_snprintf(
char *buf,
size_t remain,
259 const struct nftnl_obj *e)
261 int ret = 0, offset = 0;
263 struct nftnl_obj_ct_timeout *timeout = nftnl_obj_data(e);
265 if (e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_L3PROTO)) {
266 ret = snprintf(buf + offset, remain,
"family %d ",
268 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
270 if (e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_L4PROTO)) {
271 ret = snprintf(buf + offset, remain,
"protocol %d ",
273 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
275 if (e->flags & (1 << NFTNL_OBJ_CT_TIMEOUT_ARRAY)) {
276 uint8_t l4num = timeout->l4proto;
280 if (timeout_protocol[timeout->l4proto].attr_max == 0)
283 ret = snprintf(buf + offset, remain,
"policy = {");
284 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
286 for (i = 0; i < timeout_protocol[l4num].attr_max; i++) {
287 const char *state_name =
288 timeout_protocol[l4num].state_to_name[i][0] ?
289 timeout_protocol[l4num].state_to_name[i] :
292 if (timeout->timeout[i] != timeout_protocol[l4num].dflt_timeout[i]) {
293 ret = snprintf(buf + offset, remain,
294 "%s = %u,", state_name, timeout->timeout[i]);
295 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
299 ret = snprintf(buf + offset, remain,
"}");
300 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
307static struct attr_policy
308obj_ct_timeout_attr_policy[__NFTNL_OBJ_CT_TIMEOUT_MAX] = {
309 [NFTNL_OBJ_CT_TIMEOUT_L3PROTO] = { .maxlen =
sizeof(uint16_t) },
310 [NFTNL_OBJ_CT_TIMEOUT_L4PROTO] = { .maxlen =
sizeof(uint8_t) },
313struct obj_ops obj_ops_ct_timeout = {
314 .name =
"ct_timeout",
315 .type = NFT_OBJECT_CT_TIMEOUT,
316 .alloc_len =
sizeof(
struct nftnl_obj_ct_timeout),
317 .nftnl_max_attr = __NFTNL_OBJ_CT_TIMEOUT_MAX - 1,
318 .attr_policy = obj_ct_timeout_attr_policy,
319 .set = nftnl_obj_ct_timeout_set,
320 .get = nftnl_obj_ct_timeout_get,
321 .parse = nftnl_obj_ct_timeout_parse,
322 .build = nftnl_obj_ct_timeout_build,
323 .output = nftnl_obj_ct_timeout_snprintf,