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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.
*/
#include <stdlib.h>
#include "test.h"
static void test_loopback(int ifindex, uint8_t *mac, size_t n_mac) {
NAcdConfig config = {
.ifindex = ifindex,
.mac = mac,
.n_mac = n_mac,
.ip = { htobe32((192 << 24) | (168 << 16) | (1 << 0)) },
.timeout_msec = 100,
};
struct pollfd pfds;
NAcd *acd;
int r, fd;
r = n_acd_new(&acd);
assert(!r);
n_acd_get_fd(acd, &fd);
r = n_acd_start(acd, &config);
assert(!r);
for (;;) {
NAcdEvent *event;
pfds = (struct pollfd){ .fd = fd, .events = POLLIN };
r = poll(&pfds, 1, -1);
assert(r >= 0);
r = n_acd_dispatch(acd);
assert(!r);
r = n_acd_pop_event(acd, &event);
if (!r) {
assert(event->event == N_ACD_EVENT_READY);
break;
} else {
assert(r == N_ACD_E_DONE);
}
}
n_acd_free(acd);
}
int main(int argc, char **argv) {
struct ether_addr mac;
int r, ifindex;
r = test_setup();
if (r)
return r;
r = system("ip link set lo up");
assert(r == 0);
test_if_query("lo", &ifindex, &mac);
test_loopback(ifindex, mac.ether_addr_octet, sizeof(mac.ether_addr_octet));
return 0;
}
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