/* Is IP a local ip or not. */
bool ip_is_local(IP ip)
{
if (ip.family == TOX_AF_INET) {
IP4 ip4 = ip.ip.v4;
/* Loopback. */
if (ip4.uint8[0] == 127) {
return 1;
}
} else {
/* embedded IPv4-in-IPv6 */
if (IPV6_IPV4_IN_V6(ip.ip.v6)) {
IP ip4;
ip4.family = TOX_AF_INET;
ip4.ip.v4.uint32 = ip.ip.v6.uint32[3];
return ip_is_local(ip4);
}
/* localhost in IPv6 (::1) */
if (ip.ip.v6.uint64[0] == 0 && ip.ip.v6.uint32[2] == 0 && ip.ip.v6.uint32[3] == net_htonl(1)) {
return 1;
}
}
return 0;
}
/* Is IP a local ip or not. */
bool Local_ip(IP ip)
{
if (ip.family == AF_INET) {
IP4 ip4 = ip.ip4;
/* Loopback. */
if (ip4.uint8[0] == 127) {
return 1;
}
} else {
/* embedded IPv4-in-IPv6 */
if (IPV6_IPV4_IN_V6(ip.ip6)) {
IP ip4;
ip4.family = AF_INET;
ip4.ip4.uint32 = ip.ip6.uint32[3];
return Local_ip(ip4);
}
/* localhost in IPv6 (::1) */
if (ip.ip6.uint64[0] == 0 && ip.ip6.uint32[2] == 0 && ip.ip6.uint32[3] == htonl(1)) {
return 1;
}
}
return 0;
}
END_TEST
START_TEST(test_ip_equal)
{
int res;
IP ip1, ip2;
ip_reset(&ip1);
ip_reset(&ip2);
res = ip_equal(NULL, NULL);
ck_assert_msg(res == 0, "ip_equal(NULL, NULL): expected result 0, got %u.", res);
res = ip_equal(&ip1, NULL);
ck_assert_msg(res == 0, "ip_equal(PTR, NULL): expected result 0, got %u.", res);
res = ip_equal(NULL, &ip1);
ck_assert_msg(res == 0, "ip_equal(NULL, PTR): expected result 0, got %u.", res);
ip1.family = AF_INET;
ip1.ip4.uint32 = net_htonl(0x7F000001);
res = ip_equal(&ip1, &ip2);
ck_assert_msg(res == 0, "ip_equal( {AF_INET, 127.0.0.1}, {AF_UNSPEC, 0} ): expected result 0, got %u.", res);
ip2.family = AF_INET;
ip2.ip4.uint32 = net_htonl(0x7F000001);
res = ip_equal(&ip1, &ip2);
ck_assert_msg(res != 0, "ip_equal( {AF_INET, 127.0.0.1}, {AF_INET, 127.0.0.1} ): expected result != 0, got 0.");
ip2.ip4.uint32 = net_htonl(0x7F000002);
res = ip_equal(&ip1, &ip2);
ck_assert_msg(res == 0, "ip_equal( {AF_INET, 127.0.0.1}, {AF_INET, 127.0.0.2} ): expected result 0, got %u.", res);
ip2.family = AF_INET6;
ip2.ip6.uint32[0] = 0;
ip2.ip6.uint32[1] = 0;
ip2.ip6.uint32[2] = net_htonl(0xFFFF);
ip2.ip6.uint32[3] = net_htonl(0x7F000001);
ck_assert_msg(IPV6_IPV4_IN_V6(ip2.ip6) != 0,
"IPV6_IPV4_IN_V6(::ffff:127.0.0.1): expected != 0, got 0.");
res = ip_equal(&ip1, &ip2);
ck_assert_msg(res != 0, "ip_equal( {AF_INET, 127.0.0.1}, {AF_INET6, ::ffff:127.0.0.1} ): expected result != 0, got 0.");
memcpy(&ip2.ip6, &in6addr_loopback, sizeof(IP6));
res = ip_equal(&ip1, &ip2);
ck_assert_msg(res == 0, "ip_equal( {AF_INET, 127.0.0.1}, {AF_INET6, ::1} ): expected result 0, got %u.", res);
memcpy(&ip1, &ip2, sizeof(IP));
res = ip_equal(&ip1, &ip2);
ck_assert_msg(res != 0, "ip_equal( {AF_INET6, ::1}, {AF_INET6, ::1} ): expected result != 0, got 0.");
ip2.ip6.uint8[15]++;
res = ip_equal(&ip1, &ip2);
ck_assert_msg(res == 0, "ip_equal( {AF_INET6, ::1}, {AF_INET6, ::2} ): expected result 0, got %res.", res);
}
/* return 0 if ip is a LAN ip.
* return -1 if it is not.
*/
int ip_is_lan(IP ip)
{
if (ip_is_local(ip)) {
return 0;
}
if (ip.family == TOX_AF_INET) {
IP4 ip4 = ip.ip.v4;
/* 10.0.0.0 to 10.255.255.255 range. */
if (ip4.uint8[0] == 10) {
return 0;
}
/* 172.16.0.0 to 172.31.255.255 range. */
if (ip4.uint8[0] == 172 && ip4.uint8[1] >= 16 && ip4.uint8[1] <= 31) {
return 0;
}
/* 192.168.0.0 to 192.168.255.255 range. */
if (ip4.uint8[0] == 192 && ip4.uint8[1] == 168) {
return 0;
}
/* 169.254.1.0 to 169.254.254.255 range. */
if (ip4.uint8[0] == 169 && ip4.uint8[1] == 254 && ip4.uint8[2] != 0
&& ip4.uint8[2] != 255) {
return 0;
}
/* RFC 6598: 100.64.0.0 to 100.127.255.255 (100.64.0.0/10)
* (shared address space to stack another layer of NAT) */
if ((ip4.uint8[0] == 100) && ((ip4.uint8[1] & 0xC0) == 0x40)) {
return 0;
}
} else if (ip.family == TOX_AF_INET6) {
/* autogenerated for each interface: FE80::* (up to FEBF::*)
FF02::1 is - according to RFC 4291 - multicast all-nodes link-local */
if (((ip.ip.v6.uint8[0] == 0xFF) && (ip.ip.v6.uint8[1] < 3) && (ip.ip.v6.uint8[15] == 1)) ||
((ip.ip.v6.uint8[0] == 0xFE) && ((ip.ip.v6.uint8[1] & 0xC0) == 0x80))) {
return 0;
}
/* embedded IPv4-in-IPv6 */
if (IPV6_IPV4_IN_V6(ip.ip.v6)) {
IP ip4;
ip4.family = TOX_AF_INET;
ip4.ip.v4.uint32 = ip.ip.v6.uint32[3];
return ip_is_lan(ip4);
}
}
return -1;
}
