1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <string.h> 4 #include <errno.h> 5 #include <arpa/inet.h> 6 7 #include <libnetfilter_conntrack/libnetfilter_conntrack.h> 8 #include <libnetfilter_conntrack/libnetfilter_conntrack_tcp.h> 9 10 int main(void) 11 { 12 int ret; 13 struct nfct_handle *h; 14 struct nf_conntrack *ct; 15 16 ct = nfct_new(); 17 if (!ct) { 18 perror("nfct_new"); 19 return 0; 20 } 21 22 nfct_set_attr_u8(ct, ATTR_L3PROTO, AF_INET); 23 nfct_set_attr_u32(ct, ATTR_IPV4_SRC, inet_addr("1.1.1.1")); 24 nfct_set_attr_u32(ct, ATTR_IPV4_DST, inet_addr("2.2.2.2")); 25 26 nfct_set_attr_u8(ct, ATTR_L4PROTO, IPPROTO_TCP); 27 nfct_set_attr_u16(ct, ATTR_PORT_SRC, htons(20)); 28 nfct_set_attr_u16(ct, ATTR_PORT_DST, htons(10)); 29 30 nfct_setobjopt(ct, NFCT_SOPT_SETUP_REPLY); 31 32 nfct_set_attr_u8(ct, ATTR_TCP_STATE, TCP_CONNTRACK_SYN_SENT); 33 nfct_set_attr_u32(ct, ATTR_TIMEOUT, 100); 34 35 nfct_set_attr_u32(ct, ATTR_SNAT_IPV4, inet_addr("8.8.8.8")); 36 37 h = nfct_open(CONNTRACK, 0); 38 if (!h) { 39 perror("nfct_open"); 40 nfct_destroy(ct); 41 return -1; 42 } 43 44 ret = nfct_query(h, NFCT_Q_CREATE, ct); 45 46 printf("TEST: create conntrack "); 47 if (ret == -1) 48 printf("(%d)(%s)\n", ret, strerror(errno)); 49 else 50 printf("(OK)\n"); 51 52 nfct_close(h); 53 54 nfct_destroy(ct); 55 56 ret == -1 ? exit(EXIT_FAILURE) : exit(EXIT_SUCCESS); 57 } 58
