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/*
* Test on loopback device
* This runs the ACD engine on the loopback device, effectively testing the BPF
* filter of ACD to discard its own packets. This might happen on
* non-spanning-tree networks, or on networks that echo packets.
*/
#undef NDEBUG
#include <c-stdaux.h>
#include <stdlib.h>
#include "test.h"
static void test_loopback(int ifindex, uint8_t *mac, size_t n_mac) {
NAcdConfig *config;
NAcd *acd;
struct pollfd pfds;
int r, fd;
r = n_acd_config_new(&config);
c_assert(!r);
n_acd_config_set_ifindex(config, ifindex);
n_acd_config_set_transport(config, N_ACD_TRANSPORT_ETHERNET);
n_acd_config_set_mac(config, mac, n_mac);
r = n_acd_new(&acd, config);
c_assert(!r);
n_acd_config_free(config);
{
NAcdProbeConfig *probe_config;
NAcdProbe *probe;
struct in_addr ip = { htobe32((192 << 24) | (168 << 16) | (1 << 0)) };
r = n_acd_probe_config_new(&probe_config);
c_assert(!r);
n_acd_probe_config_set_ip(probe_config, ip);
n_acd_probe_config_set_timeout(probe_config, 100);
r = n_acd_probe(acd, &probe, probe_config);
c_assert(!r);
n_acd_probe_config_free(probe_config);
n_acd_get_fd(acd, &fd);
for (;;) {
NAcdEvent *event;
pfds = (struct pollfd){ .fd = fd, .events = POLLIN };
r = poll(&pfds, 1, -1);
c_assert(r >= 0);
r = n_acd_dispatch(acd);
c_assert(!r);
r = n_acd_pop_event(acd, &event);
c_assert(!r);
if (event) {
c_assert(event->event == N_ACD_EVENT_READY);
break;
}
}
n_acd_probe_free(probe);
}
n_acd_unref(acd);
}
int main(int argc, char **argv) {
struct ether_addr mac;
int ifindex;
test_setup();
test_loopback_up(&ifindex, &mac);
test_loopback(ifindex, mac.ether_addr_octet, sizeof(mac.ether_addr_octet));
return 0;
}
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