static void print_edns_client_subnet(const uint8_t *data, const uint16_t len)
{
struct in_addr addr4;
struct in6_addr addr6;
knot_addr_family_t family;
uint8_t src_mask, dst_mask;
uint8_t addr[IPV6_PREFIXLEN / 8] = { 0 };
uint16_t addr_len = sizeof(addr);
char addr_str[SOCKADDR_STRLEN] = { '\0' };
int ret = knot_edns_client_subnet_parse(data, len, &family, addr,
&addr_len, &src_mask, &dst_mask);
if (ret != KNOT_EOK) {
printf("\n");
return;
}
switch (family) {
case KNOT_ADDR_FAMILY_IPV4:
memcpy(&(addr4.s_addr), addr, IPV4_PREFIXLEN / 8);
inet_ntop(AF_INET, &addr4, addr_str, sizeof(addr_str));
break;
case KNOT_ADDR_FAMILY_IPV6:
memcpy(&(addr6.s6_addr), addr, IPV6_PREFIXLEN / 8);
inet_ntop(AF_INET6, &addr6, addr_str, sizeof(addr_str));
break;
default:
printf("unsupported address family\n");
return;
}
printf("%s/%u/%u\n", addr_str, src_mask, dst_mask);
}
static void test_client_subnet()
{
int ret;
knot_addr_family_t family;
uint8_t addr[IPV6_PREFIXLEN / 8] = { 0 };
uint16_t addr_len = sizeof(addr);
uint8_t src_mask, dst_mask;
uint8_t data[KNOT_EDNS_MAX_OPTION_CLIENT_SUBNET] = { 0 };
uint16_t data_len = sizeof(data);
/* Create IPv4 subnet - src mask 32 */
family = KNOT_ADDR_FAMILY_IPV4;
data_len = sizeof(data);
addr_len = 4;
memcpy(&addr, "\xFF\xFF\xFF\xFF", 4);
src_mask = 32;
dst_mask = 32;
ret = knot_edns_client_subnet_create(family, addr, addr_len, src_mask,
dst_mask, data, &data_len);
ok(ret == KNOT_EOK, "EDNS-client-subnet: create (src mask 32)");
ok(data_len == 8, "EDNS-client-subnet: create (cmp out length)");
ok(memcmp(data, "\x00\x01\x20\x20\xFF\xFF\xFF\xFF", 8) == 0,
"EDNS-client-subnet: create (cmp out)");
/* Create IPv4 subnet - src mask 31 */
data_len = sizeof(data);
src_mask = 31;
ret = knot_edns_client_subnet_create(family, addr, addr_len, src_mask,
dst_mask, data, &data_len);
ok(ret == KNOT_EOK, "EDNS-client-subnet: create (src mask 31)");
ok(data_len == 8, "EDNS-client-subnet: create (cmp out length)");
ok(memcmp(data, "\x00\x01\x1F\x20\xFF\xFF\xFF\xFE", 8) == 0,
"EDNS-client-subnet: create (cmp out)");
/* Create IPv4 subnet - src mask 7 */
data_len = sizeof(data);
src_mask = 7;
ret = knot_edns_client_subnet_create(family, addr, addr_len, src_mask,
dst_mask, data, &data_len);
ok(ret == KNOT_EOK, "EDNS-client-subnet: create (src mask 7)");
ok(data_len == 5, "EDNS-client-subnet: create (cmp out length)");
ok(memcmp(data, "\x00\x01\x07\x20\xFE", 5) == 0,
"EDNS-client-subnet: create (cmp out)");
/* Create IPv4 subnet - src mask 0 */
data_len = sizeof(data);
src_mask = 0;
ret = knot_edns_client_subnet_create(family, addr, addr_len, src_mask,
dst_mask, data, &data_len);
ok(ret == KNOT_EOK, "EDNS-client-subnet: create (src mask 0)");
ok(data_len == 4, "EDNS-client-subnet: create (cmp out length)");
ok(memcmp(data, "\x00\x01\x00\x20", 0) == 0,
"EDNS-client-subnet: create (cmp out)");
/* Create IPv6 subnet - src mask 128 */
data_len = sizeof(data);
family = KNOT_ADDR_FAMILY_IPV6;
addr_len = 16;
memcpy(&addr, "\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF", 16);
src_mask = 128;
dst_mask = 128;
ret = knot_edns_client_subnet_create(family, addr, addr_len, src_mask,
dst_mask, data, &data_len);
ok(ret == KNOT_EOK, "EDNS-client-subnet: create (src mask 128)");
ok(data_len == 20, "EDNS-client-subnet: create (cmp out length)");
ok(memcmp(data, "\x00\x02\x80\x80\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF",
20) == 0, "EDNS-client-subnet: create (cmp out)");
/* Create IPv6 subnet - src mask 1 */
data_len = sizeof(data);
family = KNOT_ADDR_FAMILY_IPV6;
addr_len = 1;
memcpy(&addr, "\xFF", 1);
src_mask = 1;
ret = knot_edns_client_subnet_create(family, addr, addr_len, src_mask,
dst_mask, data, &data_len);
ok(ret == KNOT_EOK, "EDNS-client-subnet: create (src mask 1)");
ok(data_len == 5, "EDNS-client-subnet: create (cmp out length)");
ok(memcmp(data, "\x00\x02\x01\x80\x80",
5) == 0, "EDNS-client-subnet: create (cmp out)");
/* Parse IPv4 subnet - src mask 31 */
memcpy(&data, "\x00\x01\x1F\x20\xFF\xFF\xFF\xFE", 8);
data_len = 8;
addr_len = sizeof(addr);
ret = knot_edns_client_subnet_parse(data, data_len, &family, addr,
&addr_len, &src_mask, &dst_mask);
ok(ret == KNOT_EOK, "EDNS-client-subnet: parse (src mask 31)");
ok(family == KNOT_ADDR_FAMILY_IPV4,
"EDNS-client-subnet: parse (cmp family)");
ok(src_mask == 31, "EDNS-client-subnet: parse (cmp src mask)");
ok(dst_mask == 32, "EDNS-client-subnet: parse (cmp dst mask)");
ok(addr_len == 4, "EDNS-client-subnet: parse (cmp addr length)");
ok(memcmp(addr, "\xFF\xFF\xFF\xFE", 4) == 0,
"EDNS-client-subnet: parse (cmp addr)");
/* Parse IPv6 subnet - src mask 1 */
memcpy(&data, "\x00\x02\x01\x80\x80", 5);
data_len = 5;
addr_len = sizeof(addr);
ret = knot_edns_client_subnet_parse(data, data_len, &family, addr,
&addr_len, &src_mask, &dst_mask);
ok(ret == KNOT_EOK, "EDNS-client-subnet: parse (src mask 1)");
ok(family == KNOT_ADDR_FAMILY_IPV6,
"EDNS-client-subnet: parse (cmp family)");
ok(src_mask == 1, "EDNS-client-subnet: parse (cmp src mask)");
ok(dst_mask == 128, "EDNS-client-subnet: parse (cmp dst mask)");
ok(addr_len == 1, "EDNS-client-subnet: parse (cmp addr length)");
ok(memcmp(addr, "\x80", 1) == 0,
"EDNS-client-subnet: parse (cmp addr)");
}