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spec/util_ip_spec.lua @ 12446:e54b8a5e35ad 0.12
util.random: Test whether util.crand works before using it (fix #1734)
util.crand can be configured at compile time to use the Linux
getrandom() system call, available from Linux 3.17, but it is still
possible to load it with an older kernel lacking that system call, where
attempting to use it throws an ENOSYS error.
By testing for this on load we can fall back to /dev/urandom in this
case.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Sat, 02 Apr 2022 16:33:27 +0200 |
parent | 8236:4878e4159e12 |
child | 12934:c6dffebab2f8 |
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local ip = require "util.ip"; local new_ip = ip.new_ip; local match = ip.match; local parse_cidr = ip.parse_cidr; local commonPrefixLength = ip.commonPrefixLength; describe("util.ip", function() describe("#match()", function() it("should work", function() local _ = new_ip; local ip = _"10.20.30.40"; assert.are.equal(match(ip, _"10.0.0.0", 8), true); assert.are.equal(match(ip, _"10.0.0.0", 16), false); assert.are.equal(match(ip, _"10.0.0.0", 24), false); assert.are.equal(match(ip, _"10.0.0.0", 32), false); assert.are.equal(match(ip, _"10.20.0.0", 8), true); assert.are.equal(match(ip, _"10.20.0.0", 16), true); assert.are.equal(match(ip, _"10.20.0.0", 24), false); assert.are.equal(match(ip, _"10.20.0.0", 32), false); assert.are.equal(match(ip, _"0.0.0.0", 32), false); assert.are.equal(match(ip, _"0.0.0.0", 0), true); assert.are.equal(match(ip, _"0.0.0.0"), false); assert.are.equal(match(ip, _"10.0.0.0", 255), false, "excessive number of bits"); assert.are.equal(match(ip, _"10.0.0.0", -8), true, "negative number of bits"); assert.are.equal(match(ip, _"10.0.0.0", -32), true, "negative number of bits"); assert.are.equal(match(ip, _"10.0.0.0", 0), true, "zero bits"); assert.are.equal(match(ip, _"10.0.0.0"), false, "no specified number of bits (differing ip)"); assert.are.equal(match(ip, _"10.20.30.40"), true, "no specified number of bits (same ip)"); assert.are.equal(match(_"127.0.0.1", _"127.0.0.1"), true, "simple ip"); assert.are.equal(match(_"8.8.8.8", _"8.8.0.0", 16), true); assert.are.equal(match(_"8.8.4.4", _"8.8.0.0", 16), true); end); end); describe("#parse_cidr()", function() it("should work", function() assert.are.equal(new_ip"0.0.0.0", new_ip"0.0.0.0") local function assert_cidr(cidr, ip, bits) local parsed_ip, parsed_bits = parse_cidr(cidr); assert.are.equal(new_ip(ip), parsed_ip, cidr.." parsed ip is "..ip); assert.are.equal(bits, parsed_bits, cidr.." parsed bits is "..tostring(bits)); end assert_cidr("0.0.0.0", "0.0.0.0", nil); assert_cidr("127.0.0.1", "127.0.0.1", nil); assert_cidr("127.0.0.1/0", "127.0.0.1", 0); assert_cidr("127.0.0.1/8", "127.0.0.1", 8); assert_cidr("127.0.0.1/32", "127.0.0.1", 32); assert_cidr("127.0.0.1/256", "127.0.0.1", 256); assert_cidr("::/48", "::", 48); end); end); describe("#new_ip()", function() it("should work", function() local v4, v6 = "IPv4", "IPv6"; local function assert_proto(s, proto) local ip = new_ip(s); if proto then assert.are.equal(ip and ip.proto, proto, "protocol is correct for "..("%q"):format(s)); else assert.are.equal(ip, nil, "address is invalid"); end end assert_proto("127.0.0.1", v4); assert_proto("::1", v6); assert_proto("", nil); assert_proto("abc", nil); assert_proto(" ", nil); end); end); describe("#commonPrefixLength()", function() it("should work", function() local function assert_cpl6(a, b, len, v4) local ipa, ipb = new_ip(a), new_ip(b); if v4 then len = len+96; end assert.are.equal(commonPrefixLength(ipa, ipb), len, "common prefix length of "..a.." and "..b.." is "..len); assert.are.equal(commonPrefixLength(ipb, ipa), len, "common prefix length of "..b.." and "..a.." is "..len); end local function assert_cpl4(a, b, len) return assert_cpl6(a, b, len, "IPv4"); end assert_cpl4("0.0.0.0", "0.0.0.0", 32); assert_cpl4("255.255.255.255", "0.0.0.0", 0); assert_cpl4("255.255.255.255", "255.255.0.0", 16); assert_cpl4("255.255.255.255", "255.255.255.255", 32); assert_cpl4("255.255.255.255", "255.255.255.255", 32); assert_cpl6("::1", "::1", 128); assert_cpl6("abcd::1", "abcd::1", 128); assert_cpl6("abcd::abcd", "abcd::", 112); assert_cpl6("abcd::abcd", "abcd::abcd:abcd", 96); end); end); end);