static void broadcast_check(void)
{
struct {
int version;
char const *str;
uint32_t netmask;
bool is_broadcast;
} tests[] = {
{ 4, "1.0.0.0", 0xff000000U, false },
{ 4, "127.0.0.1", 0xff000000U, false },
{ 4, "128.10.5.255", 0xffff0000U, false },
{ 4, "192.168.10.9", 0xffffff00U, false },
{ 4, "10.255.255.255", 0xff000000U, true },
{ 4, "127.0.255.255", 0xff000000U, false },
{ 4, "128.0.255.255", 0xffff0000U, true },
{ 4, "192.168.10.255", 0xffffff00U, true },
{ 6, "ff02::1", 0, true },
{ 6, "1:2:3:4::", 0, false },
};
for (unsigned t = 0; t < NB_ELEMS(tests); t++) {
struct ip_addr addr;
ip_addr_ctor_from_str(&addr, tests[t].str, strlen(tests[t].str), tests[t].version);
if (addr.family == AF_INET) {
assert(netmask_of_address(addr.u.v4) == tests[t].netmask);
}
assert(ip_addr_is_broadcast(&addr) == tests[t].is_broadcast);
}
}
bool ip_addr_is_broadcast(struct ip_addr const *addr)
{
if (ip_addr_is_v6(addr)) {
static uint8_t all_nodes[16] = {
0xff, 0x02, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 1,
};
ASSERT_COMPILE(sizeof(all_nodes) == sizeof(addr->u.v6.s6_addr));
return 0 == memcmp(addr->u.v6.s6_addr, all_nodes, sizeof(all_nodes));
} else {
uint32_t netmask = netmask_of_address(addr->u.v4);
return (netmask | ntohl(addr->u.v4.s_addr)) == 0xffffffffU;
}
}