expect_get.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <arpa/inet.h>
#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
static int cb(enum nf_conntrack_msg_type type,
struct nf_expect *exp,
void *data)
{
char buf[1024];
nfexp_snprintf(buf, 1024, exp, NFCT_T_UNKNOWN, NFCT_O_DEFAULT, 0);
printf("%s\n", buf);
return NFCT_CB_CONTINUE;
}
int main(void)
{
int ret;
struct nfct_handle *h;
struct nf_conntrack *master;
struct nf_expect *exp;
master = nfct_new();
if (!master) {
perror("nfct_new");
exit(EXIT_FAILURE);
}
nfct_set_attr_u8(master, ATTR_L3PROTO, AF_INET);
nfct_set_attr_u32(master, ATTR_IPV4_SRC, inet_addr("1.1.1.1"));
nfct_set_attr_u32(master, ATTR_IPV4_DST, inet_addr("2.2.2.2"));
nfct_set_attr_u8(master, ATTR_L4PROTO, IPPROTO_TCP);
nfct_set_attr_u16(master, ATTR_PORT_SRC, htons(10240));
nfct_set_attr_u16(master, ATTR_PORT_DST, htons(10241));
exp = nfexp_new();
if (!exp) {
perror("nfexp_new");
nfct_destroy(master);
exit(EXIT_FAILURE);
}
nfexp_set_attr(exp, ATTR_EXP_MASTER, master);
h = nfct_open(EXPECT, 0);
if (!h) {
perror("nfct_open");
nfct_destroy(master);
return -1;
}
nfexp_callback_register(h, NFCT_T_ALL, cb, NULL);
ret = nfexp_query(h, NFCT_Q_GET, exp);
printf("TEST: get expectation ");
if (ret == -1)
printf("(%d)(%s)\n", ret, strerror(errno));
else
printf("(OK)\n");
nfct_close(h);
nfct_destroy(master);
ret == -1 ? exit(EXIT_FAILURE) : exit(EXIT_SUCCESS);
}
nfct_open
struct nfct_handle * nfct_open(uint8_t, unsigned)
Definition main.c:84
nfct_close
int nfct_close(struct nfct_handle *cth)
Definition main.c:105
nfexp_callback_register
int nfexp_callback_register(struct nfct_handle *h, enum nf_conntrack_msg_type type, int(*cb)(enum nf_conntrack_msg_type type, struct nf_expect *exp, void *data), void *data)
Definition expect/api.c:158
nfexp_query
int nfexp_query(struct nfct_handle *h, const enum nf_conntrack_query qt, const void *data)
Definition expect/api.c:695
nfct_set_attr_u32
void nfct_set_attr_u32(struct nf_conntrack *ct, const enum nf_conntrack_attr type, uint32_t value)
Definition conntrack/api.c:439
nfct_destroy
void nfct_destroy(struct nf_conntrack *ct)
Definition conntrack/api.c:93
nfct_set_attr_u16
void nfct_set_attr_u16(struct nf_conntrack *ct, const enum nf_conntrack_attr type, uint16_t value)
Definition conntrack/api.c:426
nfct_set_attr_u8
void nfct_set_attr_u8(struct nf_conntrack *ct, const enum nf_conntrack_attr type, uint8_t value)
Definition conntrack/api.c:413
nfct_new
struct nf_conntrack * nfct_new(void)
Definition conntrack/api.c:76
nfexp_new
struct nf_expect * nfexp_new(void)
Definition expect/api.c:29
nfexp_set_attr
void nfexp_set_attr(struct nf_expect *exp, const enum nf_expect_attr type, const void *value)
Definition expect/api.c:309
nfexp_snprintf
int nfexp_snprintf(char *buf, unsigned int size, const struct nf_expect *exp, const unsigned int msg_type, const unsigned int out_type, const unsigned int out_flags)
Definition expect/api.c:802