#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <arpa/inet.h>
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#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
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#include <libnetfilter_conntrack/libnetfilter_conntrack_tcp.h>
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/*
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* WARNING: This test file creates an expectation for the FTP helper.
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* Therefore, make sure you have load nf_conntrack_ftp before executing it.
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*/
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int main(void)
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{
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int ret;
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struct nfct_handle *h;
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struct nf_conntrack *master, *expected, *mask, *nat;
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struct nf_expect *exp;
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/*
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* Step 1: Setup master conntrack
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*/
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master = nfct_new();
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if (!master) {
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perror("nfct_new");
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exit(EXIT_FAILURE);
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}
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nfct_set_attr_u8(master, ATTR_L3PROTO, AF_INET);
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nfct_set_attr_u32(master, ATTR_IPV4_SRC, inet_addr("1.1.1.1"));
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nfct_set_attr_u32(master, ATTR_IPV4_DST, inet_addr("2.2.2.2"));
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nfct_set_attr_u8(master, ATTR_L4PROTO, IPPROTO_TCP);
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nfct_set_attr_u16(master, ATTR_PORT_SRC, htons(1025));
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nfct_set_attr_u16(master, ATTR_PORT_DST, htons(21));
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nfct_setobjopt(master, NFCT_SOPT_SETUP_REPLY);
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nfct_set_attr_u8(master, ATTR_TCP_STATE, TCP_CONNTRACK_ESTABLISHED);
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nfct_set_attr_u32(master, ATTR_TIMEOUT, 200);
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nfct_set_attr(master, ATTR_HELPER_NAME, "ftp");
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h = nfct_open(CONNTRACK, 0);
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if (!h) {
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perror("nfct_open");
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nfct_destroy(master);
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return -1;
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}
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ret = nfct_query(h, NFCT_Q_CREATE, master);
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printf("TEST: add master conntrack ");
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if (ret == -1)
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printf("(%d)(%s)\n", ret, strerror(errno));
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else
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printf("(OK)\n");
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nfct_close(h);
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expected = nfct_new();
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if (!expected) {
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perror("nfct_new");
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exit(EXIT_FAILURE);
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}
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nfct_set_attr_u8(expected, ATTR_L3PROTO, AF_INET);
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nfct_set_attr_u32(expected, ATTR_IPV4_SRC, inet_addr("1.1.1.1"));
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nfct_set_attr_u32(expected, ATTR_IPV4_DST, inet_addr("2.2.2.2"));
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nfct_set_attr_u8(expected, ATTR_L4PROTO, IPPROTO_TCP);
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nfct_set_attr_u16(expected, ATTR_PORT_SRC, 0);
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nfct_set_attr_u16(expected, ATTR_PORT_DST, htons(10241));
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mask = nfct_new();
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if (!mask) {
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perror("nfct_new");
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nfct_destroy(master);
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nfct_destroy(expected);
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exit(EXIT_FAILURE);
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}
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nfct_set_attr_u8(mask, ATTR_L3PROTO, AF_INET);
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nfct_set_attr_u32(mask, ATTR_IPV4_SRC, 0xffffffff);
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nfct_set_attr_u32(mask, ATTR_IPV4_DST, 0xffffffff);
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nfct_set_attr_u8(mask, ATTR_L4PROTO, IPPROTO_TCP);
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nfct_set_attr_u16(mask, ATTR_PORT_SRC, 0x0000);
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nfct_set_attr_u16(mask, ATTR_PORT_DST, 0xffff);
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nat = nfct_new();
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if (!nat) {
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perror("nfct_new");
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nfct_destroy(mask);
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nfct_destroy(master);
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nfct_destroy(expected);
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exit(EXIT_FAILURE);
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}
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nfct_set_attr_u8(nat, ATTR_L3PROTO, AF_INET);
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nfct_set_attr_u32(nat, ATTR_IPV4_SRC, inet_addr("3.3.3.3"));
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nfct_set_attr_u32(nat, ATTR_IPV4_DST, 0);
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nfct_set_attr_u8(nat, ATTR_L4PROTO, IPPROTO_TCP);
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nfct_set_attr_u16(nat, ATTR_PORT_SRC, 12345);
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nfct_set_attr_u16(nat, ATTR_PORT_DST, 0);
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/*
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* Step 2: Setup expectation
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*/
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exp = nfexp_new();
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if (!exp) {
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perror("nfexp_new");
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nfct_destroy(master);
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nfct_destroy(expected);
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nfct_destroy(mask);
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exit(EXIT_FAILURE);
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}
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nfexp_set_attr(exp, ATTR_EXP_MASTER, master);
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nfexp_set_attr(exp, ATTR_EXP_EXPECTED, expected);
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nfexp_set_attr(exp, ATTR_EXP_MASK, mask);
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nfexp_set_attr(exp, ATTR_EXP_NAT_TUPLE, nat);
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nfexp_set_attr_u32(exp, ATTR_EXP_NAT_DIR, 0);
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nfexp_set_attr_u32(exp, ATTR_EXP_TIMEOUT, 200);
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nfct_destroy(master);
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nfct_destroy(expected);
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nfct_destroy(mask);
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nfct_destroy(nat);
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h = nfct_open(EXPECT, 0);
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if (!h) {
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perror("nfct_open");
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return -1;
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}
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ret = nfexp_query(h, NFCT_Q_CREATE, exp);
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printf("TEST: create expectation ");
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if (ret == -1)
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printf("(%d)(%s)\n", ret, strerror(errno));
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else
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printf("(OK)\n");
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nfct_close(h);
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ret == -1 ? exit(EXIT_FAILURE) : exit(EXIT_SUCCESS);
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}
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