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#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
#include <libnetfilter_conntrack/libnetfilter_conntrack_tcp.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;
}
static int event_cb(enum nf_conntrack_msg_type type,
struct nf_expect *exp,
void *data)
{
static int n = 0;
char buf[1024];
nfexp_snprintf(buf, 1024, exp, type, NFCT_O_DEFAULT, 0);
printf("%s\n", buf);
if (++n == 10)
return NFCT_CB_STOP;
return NFCT_CB_CONTINUE;
}
int main()
{
int ret;
u_int8_t family = AF_INET;
struct nfct_handle *h;
struct nf_conntrack *master, *expected, *mask;
struct nf_expect *exp;
char buf[1024];
printf("Test for NEW expectation libnetfilter_conntrack API\n");
printf("===================================================\n");
master = nfct_new();
if (!master) {
perror("nfct_new");
exit(EXIT_FAILURE);
}
nfct_set_attr_u8(master, ATTR_ORIG_L3PROTO, AF_INET);
nfct_set_attr_u32(master, ATTR_ORIG_IPV4_SRC, inet_addr("1.1.1.1"));
nfct_set_attr_u32(master, ATTR_ORIG_IPV4_DST, inet_addr("2.2.2.2"));
nfct_set_attr_u8(master, ATTR_ORIG_L4PROTO, IPPROTO_TCP);
nfct_set_attr_u16(master, ATTR_ORIG_PORT_SRC, htons(1025));
nfct_set_attr_u16(master, ATTR_ORIG_PORT_DST, htons(21));
nfct_set_attr_u8(master, ATTR_REPL_L3PROTO, AF_INET);
nfct_set_attr_u32(master, ATTR_REPL_IPV4_SRC, inet_addr("2.2.2.2"));
nfct_set_attr_u32(master, ATTR_REPL_IPV4_DST, inet_addr("1.1.1.1"));
nfct_set_attr_u8(master, ATTR_REPL_L4PROTO, IPPROTO_TCP);
nfct_set_attr_u16(master, ATTR_REPL_PORT_SRC, htons(21));
nfct_set_attr_u16(master, ATTR_REPL_PORT_DST, htons(1025));
nfct_set_attr_u8(master, ATTR_TCP_STATE, TCP_CONNTRACK_LISTEN);
nfct_set_attr_u32(master, ATTR_TIMEOUT, 200);
h = nfct_open(CONNTRACK, 0);
if (!h) {
perror("nfct_open");
return -1;
}
ret = nfct_query(h, NFCT_Q_CREATE, master);
printf("TEST 1: create conntrack (%d)(%s)\n", ret, strerror(errno));
nfct_close(h);
expected = nfct_new();
if (!expected) {
perror("nfct_new");
exit(EXIT_FAILURE);
}
nfct_set_attr_u8(expected, ATTR_ORIG_L3PROTO, AF_INET);
nfct_set_attr_u32(expected, ATTR_ORIG_IPV4_SRC, inet_addr("4.4.4.4"));
nfct_set_attr_u32(expected, ATTR_ORIG_IPV4_DST, inet_addr("5.5.5.5"));
nfct_set_attr_u8(expected, ATTR_ORIG_L4PROTO, IPPROTO_TCP);
nfct_set_attr_u16(expected, ATTR_ORIG_PORT_SRC, htons(10240));
nfct_set_attr_u16(expected, ATTR_ORIG_PORT_DST, htons(10241));
mask = nfct_new();
if (!mask) {
perror("nfct_new");
exit(EXIT_FAILURE);
}
nfct_set_attr_u8(mask, ATTR_ORIG_L3PROTO, AF_INET);
nfct_set_attr_u32(mask, ATTR_ORIG_IPV4_SRC, 0xffffffff);
nfct_set_attr_u32(mask, ATTR_ORIG_IPV4_DST, 0xffffffff);
nfct_set_attr_u8(mask, ATTR_ORIG_L4PROTO, IPPROTO_TCP);
nfct_set_attr_u16(mask, ATTR_ORIG_PORT_SRC, 0xffff);
nfct_set_attr_u16(mask, ATTR_ORIG_PORT_DST, 0xffff);
exp = nfexp_new();
if (!exp) {
perror("nfexp_new");
exit(EXIT_FAILURE);
}
nfexp_set_attr(exp, ATTR_EXP_MASTER, master);
nfexp_set_attr(exp, ATTR_EXP_EXPECTED, expected);
nfexp_set_attr(exp, ATTR_EXP_MASK, mask);
nfexp_set_attr_u32(exp, ATTR_EXP_TIMEOUT, 200);
h = nfct_open(EXPECT, 0);
if (!h) {
perror("nfct_open");
return -1;
}
ret = nfexp_query(h, NFCT_Q_CREATE, exp);
printf("TEST 2: create expectation (%d)(%s)\n", ret, strerror(errno));
nfexp_callback_register(h, NFCT_T_ALL, cb, NULL);
ret = nfexp_query(h, NFCT_Q_GET, exp);
printf("TEST 3: get expectation (%d)(%s)\n", ret, strerror(errno));
ret = nfexp_query(h, NFCT_Q_DESTROY, exp);
printf("TEST 4: destroy expectation (%d)(%s)\n", ret, strerror(errno));
nfct_close(h);
h = nfct_open(EXPECT, NF_NETLINK_CONNTRACK_EXP_NEW);
if (!h) {
perror("nfct_open");
return -1;
}
nfexp_callback_register(h, NFCT_T_ALL, event_cb, NULL);
printf("TEST 5: waiting for 10 events...\n");
ret = nfexp_catch(h);
printf("TEST 5: OK (%d)(%s)\n", ret, strerror(errno));
nfct_close(h);
}
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