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#include <stdio.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_conntrack *ct,
void *data)
{
char buf[1024];
nfct_snprintf(buf, 1024, ct, NFCT_T_UNKNOWN, NFCT_O_DEFAULT, NFCT_OF_SHOW_LAYER3);
printf("%s\n", buf);
return NFCT_CB_CONTINUE;
}
static int event_cb(enum nf_conntrack_msg_type type,
struct nf_conntrack *ct,
void *data)
{
static int n = 0;
char buf[1024];
nfct_snprintf(buf, 1024, ct, type, NFCT_O_XML, 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 *ct;
char buf[1024];
printf("Test for NEW libnetfilter_conntrack API\n");
printf("=======================================\n");
ct = nfct_new();
if (!ct) {
perror("nfct_new");
return 0;
}
nfct_set_attr_u8(ct, ATTR_ORIG_L3PROTO, AF_INET);
nfct_set_attr_u32(ct, ATTR_ORIG_IPV4_SRC, inet_addr("1.1.1.1"));
nfct_set_attr_u32(ct, ATTR_ORIG_IPV4_DST, inet_addr("2.2.2.2"));
nfct_set_attr_u8(ct, ATTR_ORIG_L4PROTO, IPPROTO_TCP);
nfct_set_attr_u16(ct, ATTR_ORIG_PORT_SRC, htons(20));
nfct_set_attr_u16(ct, ATTR_ORIG_PORT_DST, htons(10));
nfct_set_attr_u8(ct, ATTR_REPL_L3PROTO, AF_INET);
nfct_set_attr_u32(ct, ATTR_REPL_IPV4_SRC, inet_addr("2.2.2.2"));
nfct_set_attr_u32(ct, ATTR_REPL_IPV4_DST, inet_addr("1.1.1.1"));
nfct_set_attr_u8(ct, ATTR_REPL_L4PROTO, IPPROTO_TCP);
nfct_set_attr_u16(ct, ATTR_REPL_PORT_SRC, htons(10));
nfct_set_attr_u16(ct, ATTR_REPL_PORT_DST, htons(20));
nfct_set_attr_u8(ct, ATTR_TCP_STATE, TCP_CONNTRACK_LISTEN);
nfct_set_attr_u32(ct, ATTR_TIMEOUT, 100);
h = nfct_open(CONNTRACK, 0);
if (!h) {
perror("nfct_open");
return -1;
}
ret = nfct_query(h, NFCT_Q_CREATE, ct);
printf("TEST 1: create conntrack (%d)(%s)\n", ret, strerror(errno));
ret = nfct_query(h, NFCT_Q_UPDATE, ct);
printf("TEST 2: update conntrack (%d)(%s)\n", ret, strerror(errno));
nfct_callback_register(h, NFCT_T_ALL, cb, NULL);
ret = nfct_query(h, NFCT_Q_GET, ct);
printf("TEST 3: get conntrack (%d)(%s)\n", ret, strerror(errno));
ret = nfct_query(h, NFCT_Q_DESTROY, ct);
printf("TEST 4: destroy conntrack (%d)(%s)\n", ret, strerror(errno));
nfct_set_attr_u32(ct, ATTR_SNAT_IPV4, inet_addr("8.8.8.8"));
ret = nfct_query(h, NFCT_Q_CREATE, ct);
printf("TEST 5: create NAT conntrack (%d)(%s)\n", ret, strerror(errno));
ret = nfct_query(h, NFCT_Q_GET, ct);
printf("TEST 6: get NAT conntrack (%d)(%s)\n", ret, strerror(errno));
ret = nfct_query(h, NFCT_Q_DESTROY, ct);
printf("TEST 7: destroy NAT conntrack (%d)(%s)\n",ret,strerror(errno));
nfct_close(h);
h = nfct_open(CONNTRACK, NFCT_ALL_CT_GROUPS);
if (!h) {
perror("nfct_open");
return -1;
}
nfct_callback_register(h, NFCT_T_ALL, event_cb, NULL);
printf("TEST 8: waiting for 10 events...\n");
ret = nfct_catch(h);
printf("TEST 8: OK (%d)(%s)\n", ret, strerror(errno));
nfct_close(h);
}
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