1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <string.h> 4 #include <errno.h> 5 6 #include <libnetfilter_conntrack/libnetfilter_conntrack.h> 7 8 static int n = 0; 9 10 static int 11 ct_event_cb(enum nf_conntrack_msg_type type,struct nf_conntrack *ct, void *data) 12 { 13 char buf[1024]; 14 15 nfct_snprintf(buf, sizeof(buf), ct, type, NFCT_O_PLAIN, NFCT_OF_TIME); 16 printf("[CT] %s\n", buf); 17 18 if (++n == 20) 19 return NFCT_CB_STOP; 20 21 return NFCT_CB_CONTINUE; 22 } 23 24 static int 25 exp_event_cb(enum nf_conntrack_msg_type type,struct nf_expect *exp, void *data) 26 { 27 char buf[1024]; 28 29 nfexp_snprintf(buf, 1024, exp, type, NFCT_O_DEFAULT, 0); 30 printf("[EXP] %s\n", buf); 31 32 if (++n == 20) 33 return NFCT_CB_STOP; 34 35 return NFCT_CB_CONTINUE; 36 } 37 38 int main(void) 39 { 40 int ret = 0; 41 struct nfct_handle *h; 42 43 h = nfct_open(NFNL_SUBSYS_NONE, NF_NETLINK_CONNTRACK_EXP_NEW | 44 NF_NETLINK_CONNTRACK_EXP_UPDATE | 45 NF_NETLINK_CONNTRACK_EXP_DESTROY | 46 NF_NETLINK_CONNTRACK_NEW | 47 NF_NETLINK_CONNTRACK_UPDATE | 48 NF_NETLINK_CONNTRACK_DESTROY); 49 if (h == NULL) { 50 perror("nfct_open"); 51 return -1; 52 } 53 54 nfexp_callback_register(h, NFCT_T_ALL, exp_event_cb, NULL); 55 nfct_callback_register(h, NFCT_T_ALL, ct_event_cb, NULL); 56 57 printf("TEST: waiting for 20 expectation events...\n"); 58 59 /* we may use nfexp_catch() instead, it would also work. */ 60 ret = nfct_catch(h); 61 62 printf("TEST: expectation events "); 63 if (ret == -1) 64 printf("(%d)(%s)\n", ret, strerror(errno)); 65 else 66 printf("(OK)\n"); 67 68 nfct_close(h); 69 70 ret == -1 ? exit(EXIT_FAILURE) : exit(EXIT_SUCCESS); 71 } 72
