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// clang-format off
#include <stddef.h>
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdint.h>
#include <setjmp.h>
#include <cmocka.h>
#include <libnet.h>
// clang-format on
/******************************************************************************
*
* LOCAL HELPERS
*
*****************************************************************************/
static void
print_err_buf(const char *err_buf)
{
fprintf(stdout, "[ERROR]: %s\n", err_buf);
exit(EXIT_FAILURE);
}
/******************************************************************************
*
* END OF LOCAL HELPERS
*
*****************************************************************************/
static void
test_libnet_build_ethernet(void **state)
{
(void)state; /* unused */
libnet_ptag_t eth_ptag = (-1);
struct libnet_ethernet_hdr *eth_hdr = NULL;
char errbuf[LIBNET_ERRBUF_SIZE];
uint8_t *header = NULL;
uint32_t header_size = 0;
uint8_t mac_dst[ETHER_ADDR_LEN] = { 0x11, 0x11, 0x11, 0x22, 0x22, 0x22 };
uint8_t mac_src[ETHER_ADDR_LEN] = { 0x44, 0x44, 0x44, 0x55, 0x55, 0x55 };
int rv = (-1);
libnet_t *l = libnet_init(LIBNET_LINK_ADV, /* enable advanced mode */
NULL, /* interface */
errbuf); /* error buffer */
if (NULL == l)
{
print_err_buf(errbuf);
}
assert_non_null(l);
eth_ptag = libnet_build_ethernet(mac_dst, /* destination ethernet address */
mac_src, /* source ethernet address */
ETHERTYPE_IP, /* upper layer protocol type */
NULL, /* payload */
0, /* payload length */
l, /* libnet context */
0); /* protocol tag */
if ((-1) == eth_ptag)
{
print_err_buf(errbuf);
}
assert_int_not_equal(eth_ptag, (-1));
rv = libnet_adv_cull_header(l, /* libnet context */
eth_ptag, /* protocol tag */
&header, /* header */
&header_size); /* header size */
if ((-1) == rv)
{
print_err_buf(errbuf);
}
assert_int_not_equal(eth_ptag, (-1));
assert_int_not_equal(header_size, 0);
eth_hdr = (struct libnet_ethernet_hdr *)header;
assert_int_equal(eth_hdr->ether_type, htons(ETHERTYPE_IP));
// Compare source macs
for (uint8_t i = 0; i < ETHER_ADDR_LEN; i++)
{
assert_int_equal(eth_hdr->ether_shost[i], mac_src[i]);
}
// Compare destination macs
for (uint8_t i = 0; i < ETHER_ADDR_LEN; i++)
{
assert_int_equal(eth_hdr->ether_dhost[i], mac_dst[i]);
}
libnet_destroy(l);
}
int
main(void)
{
const struct CMUnitTest tests[] = {
cmocka_unit_test(test_libnet_build_ethernet),
};
return cmocka_run_group_tests(tests, NULL, NULL);
}
/**
* Local Variables:
* indent-tabs-mode: nil
* c-file-style: "stroustrup"
* End:
*/
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