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basic: generate netmasks for IPv6 and generic IP family addresses

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Added functions to generate netmasks for IPv6 and generic IP family addresses.
This commit is contained in:
Topi Miettinen
2022-08-29 14:23:17 +09:00
committed by Yu Watanabe
parent 9442b2f78f
commit 3f36b9ed47
3 changed files with 96 additions and 0 deletions
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src/test/test-in-addr-util.c
+52
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@@ -364,4 +364,56 @@ TEST(in_addr_to_string) {
test_in_addr_to_string_one(AF_INET6, "fe80::");
}
TEST(in_addr_prefixlen_to_netmask) {
union in_addr_union addr;
static const char *const ipv4_netmasks[] = {
"0.0.0.0", "128.0.0.0", "192.0.0.0", "224.0.0.0", "240.0.0.0",
"248.0.0.0", "252.0.0.0", "254.0.0.0", "255.0.0.0",
"255.128.0.0", "255.192.0.0", "255.224.0.0", "255.240.0.0",
"255.248.0.0", "255.252.0.0", "255.254.0.0", "255.255.0.0",
"255.255.128.0", "255.255.192.0", "255.255.224.0", "255.255.240.0",
"255.255.248.0", "255.255.252.0", "255.255.254.0", "255.255.255.0",
"255.255.255.128", "255.255.255.192", "255.255.255.224", "255.255.255.240",
"255.255.255.248", "255.255.255.252", "255.255.255.254", "255.255.255.255",
};
static const char *const ipv6_netmasks[] = {
[0] = "::",
[1] = "8000::",
[2] = "c000::",
[7] = "fe00::",
[8] = "ff00::",
[9] = "ff80::",
[16] = "ffff::",
[17] = "ffff:8000::",
[32] = "ffff:ffff::",
[33] = "ffff:ffff:8000::",
[64] = "ffff:ffff:ffff:ffff::",
[65] = "ffff:ffff:ffff:ffff:8000::",
[96] = "ffff:ffff:ffff:ffff:ffff:ffff::",
[97] = "ffff:ffff:ffff:ffff:ffff:ffff:8000:0",
[127] = "ffff:ffff:ffff:ffff:ffff:ffff:ffff:fffe",
[128] = "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"
};
for (unsigned char prefixlen = 0; prefixlen <= 32; prefixlen++) {
_cleanup_free_ char *result = NULL;
assert_se(in_addr_prefixlen_to_netmask(AF_INET, &addr, prefixlen) >= 0);
assert_se(in_addr_to_string(AF_INET, &addr, &result) >= 0);
printf("test_in_addr_prefixlen_to_netmask: %s == %s\n", ipv4_netmasks[prefixlen], result);
assert_se(streq(ipv4_netmasks[prefixlen], result));
}
for (unsigned char prefixlen = 0; prefixlen <= 128; prefixlen++) {
_cleanup_free_ char *result = NULL;
assert_se(in_addr_prefixlen_to_netmask(AF_INET6, &addr, prefixlen) >= 0);
assert_se(in_addr_to_string(AF_INET6, &addr, &result) >= 0);
printf("test_in_addr_prefixlen_to_netmask: %s\n", result);
if (ipv6_netmasks[prefixlen])
assert_se(streq(ipv6_netmasks[prefixlen], result));
}
}
DEFINE_TEST_MAIN(LOG_DEBUG);