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// Copyright (C) 2012-2015 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include <config.h>
#include <dhcpsrv/addr_utilities.h>
#include <exceptions/exceptions.h>
#include <gtest/gtest.h>
#include <vector>
#include <stdint.h>
#include <stdlib.h>
using namespace std;
using namespace isc::dhcp;
using namespace isc::asiolink;
namespace {
// This test verifies that lastAddrInPrefix is able to handle IPv4 operations.
TEST(AddrUtilitiesTest, lastAddrInPrefix4) {
IOAddress addr1("192.0.2.1");
// Prefixes rounded to addresses are easy...
EXPECT_EQ("192.255.255.255", lastAddrInPrefix(addr1, 8).toText());
EXPECT_EQ("192.0.255.255", lastAddrInPrefix(addr1, 16).toText());
EXPECT_EQ("192.0.2.255", lastAddrInPrefix(addr1, 24).toText());
// these are trickier
EXPECT_EQ("192.0.2.127", lastAddrInPrefix(addr1, 25).toText());
EXPECT_EQ("192.0.2.63", lastAddrInPrefix(addr1, 26).toText());
EXPECT_EQ("192.0.2.31", lastAddrInPrefix(addr1, 27).toText());
EXPECT_EQ("192.0.2.15", lastAddrInPrefix(addr1, 28).toText());
EXPECT_EQ("192.0.2.7", lastAddrInPrefix(addr1, 29).toText());
EXPECT_EQ("192.0.2.3", lastAddrInPrefix(addr1, 30).toText());
// that doesn't make much sense as /31 subnet consists of network address
// and a broadcast address, with 0 usable addresses.
EXPECT_EQ("192.0.2.1", lastAddrInPrefix(addr1, 31).toText());
EXPECT_EQ("192.0.2.1", lastAddrInPrefix(addr1, 32).toText());
// Let's check extreme cases
IOAddress anyAddr("0.0.0.0");
EXPECT_EQ("127.255.255.255", lastAddrInPrefix(anyAddr, 1).toText());
EXPECT_EQ("255.255.255.255", lastAddrInPrefix(anyAddr, 0).toText());
EXPECT_EQ("0.0.0.0", lastAddrInPrefix(anyAddr, 32).toText());
}
// This test checks if firstAddrInPrefix is able to handle IPv4 operations.
TEST(AddrUtilitiesTest, firstAddrInPrefix4) {
IOAddress addr1("192.223.2.255");
// Prefixes rounded to addresses are easy...
EXPECT_EQ("192.0.0.0", firstAddrInPrefix(addr1, 8).toText());
EXPECT_EQ("192.223.0.0", firstAddrInPrefix(addr1, 16).toText());
EXPECT_EQ("192.223.2.0", firstAddrInPrefix(addr1, 24).toText());
// these are trickier
EXPECT_EQ("192.223.2.128", firstAddrInPrefix(addr1, 25).toText());
EXPECT_EQ("192.223.2.192", firstAddrInPrefix(addr1, 26).toText());
EXPECT_EQ("192.223.2.224", firstAddrInPrefix(addr1, 27).toText());
EXPECT_EQ("192.223.2.240", firstAddrInPrefix(addr1, 28).toText());
EXPECT_EQ("192.223.2.248", firstAddrInPrefix(addr1, 29).toText());
EXPECT_EQ("192.223.2.252", firstAddrInPrefix(addr1, 30).toText());
// that doesn't make much sense as /31 subnet consists of network address
// and a broadcast address, with 0 usable addresses.
EXPECT_EQ("192.223.2.254", firstAddrInPrefix(addr1, 31).toText());
EXPECT_EQ("192.223.2.255", firstAddrInPrefix(addr1, 32).toText());
// Let's check extreme cases.
IOAddress bcast("255.255.255.255");
EXPECT_EQ("128.0.0.0", firstAddrInPrefix(bcast, 1).toText());
EXPECT_EQ("0.0.0.0", firstAddrInPrefix(bcast, 0).toText());
EXPECT_EQ("255.255.255.255", firstAddrInPrefix(bcast, 32).toText());
}
/// This test checks if lastAddrInPrefix properly supports IPv6 operations
TEST(AddrUtilitiesTest, lastAddrInPrefix6) {
IOAddress addr1("2001:db8:1:1234:5678:abcd:1234:beef");
// Prefixes rounded to nibbles are easy...
EXPECT_EQ("2001:db8:1:1234:5678:abcd:1234:ffff",
lastAddrInPrefix(addr1, 112).toText());
EXPECT_EQ("2001:db8:1:1234:5678:abcd:123f:ffff",
lastAddrInPrefix(addr1, 108).toText());
EXPECT_EQ("2001:db8:1:1234:5678:abcd:12ff:ffff",
lastAddrInPrefix(addr1, 104).toText());
EXPECT_EQ("2001:db8:1:1234:ffff:ffff:ffff:ffff",
lastAddrInPrefix(addr1, 64).toText());
IOAddress addr2("2001::");
// These are tricker, though, as they are done in 1 bit increments
// the last address in 2001::/127 pool should be 2001::1
EXPECT_EQ("2001::1", lastAddrInPrefix(addr2, 127).toText());
EXPECT_EQ("2001::3", lastAddrInPrefix(addr2, 126).toText());
EXPECT_EQ("2001::7", lastAddrInPrefix(addr2, 125).toText());
EXPECT_EQ("2001::f", lastAddrInPrefix(addr2, 124).toText());
EXPECT_EQ("2001::1f", lastAddrInPrefix(addr2, 123).toText());
EXPECT_EQ("2001::3f", lastAddrInPrefix(addr2, 122).toText());
EXPECT_EQ("2001::7f", lastAddrInPrefix(addr2, 121).toText());
EXPECT_EQ("2001::ff", lastAddrInPrefix(addr2, 120).toText());
// Let's check extreme cases
IOAddress anyAddr("::");
EXPECT_EQ("7fff:ffff:ffff:ffff:ffff:ffff:ffff:ffff",
lastAddrInPrefix(anyAddr, 1).toText());
EXPECT_EQ("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff",
lastAddrInPrefix(anyAddr, 0).toText());
EXPECT_EQ("::", lastAddrInPrefix(anyAddr, 128).toText());
}
/// This test checks if firstAddrInPrefix properly supports IPv6 operations
TEST(AddrUtilitiesTest, firstAddrInPrefix6) {
IOAddress addr1("2001:db8:1:1234:5678:1234:abcd:beef");
// Prefixes rounded to nibbles are easy...
EXPECT_EQ("2001:db8:1:1234:5678:1234::",
firstAddrInPrefix(addr1, 96).toText());
EXPECT_EQ("2001:db8:1:1234:5678:1230::",
firstAddrInPrefix(addr1, 92).toText());
EXPECT_EQ("2001:db8:1:1234:5678:1200::",
firstAddrInPrefix(addr1, 88).toText());
EXPECT_EQ("2001:db8:1:1234::",
firstAddrInPrefix(addr1, 64).toText());
IOAddress addr2("2001::ffff");
// These are tricker, though, as they are done in 1 bit increments
// the first address in 2001::/127 pool should be 2001::1
EXPECT_EQ("2001::fffe", firstAddrInPrefix(addr2, 127).toText());
EXPECT_EQ("2001::fffc", firstAddrInPrefix(addr2, 126).toText());
EXPECT_EQ("2001::fff8", firstAddrInPrefix(addr2, 125).toText());
EXPECT_EQ("2001::fff0", firstAddrInPrefix(addr2, 124).toText());
EXPECT_EQ("2001::ffe0", firstAddrInPrefix(addr2, 123).toText());
EXPECT_EQ("2001::ffc0", firstAddrInPrefix(addr2, 122).toText());
EXPECT_EQ("2001::ff80", firstAddrInPrefix(addr2, 121).toText());
EXPECT_EQ("2001::ff00", firstAddrInPrefix(addr2, 120).toText());
}
// Checks if IPv4 netmask is generated properly
TEST(AddrUtilitiesTest, getNetmask4) {
EXPECT_EQ("0.0.0.0", getNetmask4(0).toText());
EXPECT_EQ("128.0.0.0", getNetmask4(1).toText());
EXPECT_EQ("192.0.0.0", getNetmask4(2).toText());
EXPECT_EQ("224.0.0.0", getNetmask4(3).toText());
EXPECT_EQ("240.0.0.0", getNetmask4(4).toText());
EXPECT_EQ("248.0.0.0", getNetmask4(5).toText());
EXPECT_EQ("252.0.0.0", getNetmask4(6).toText());
EXPECT_EQ("254.0.0.0", getNetmask4(7).toText());
EXPECT_EQ("255.0.0.0", getNetmask4(8).toText());
EXPECT_EQ("255.128.0.0", getNetmask4(9).toText());
EXPECT_EQ("255.192.0.0", getNetmask4(10).toText());
EXPECT_EQ("255.224.0.0", getNetmask4(11).toText());
EXPECT_EQ("255.240.0.0", getNetmask4(12).toText());
EXPECT_EQ("255.248.0.0", getNetmask4(13).toText());
EXPECT_EQ("255.252.0.0", getNetmask4(14).toText());
EXPECT_EQ("255.254.0.0", getNetmask4(15).toText());
EXPECT_EQ("255.255.0.0", getNetmask4(16).toText());
EXPECT_EQ("255.255.128.0", getNetmask4(17).toText());
EXPECT_EQ("255.255.192.0", getNetmask4(18).toText());
EXPECT_EQ("255.255.224.0", getNetmask4(19).toText());
EXPECT_EQ("255.255.240.0", getNetmask4(20).toText());
EXPECT_EQ("255.255.248.0", getNetmask4(21).toText());
EXPECT_EQ("255.255.252.0", getNetmask4(22).toText());
EXPECT_EQ("255.255.254.0", getNetmask4(23).toText());
EXPECT_EQ("255.255.255.0", getNetmask4(24).toText());
EXPECT_EQ("255.255.255.128", getNetmask4(25).toText());
EXPECT_EQ("255.255.255.192", getNetmask4(26).toText());
EXPECT_EQ("255.255.255.224", getNetmask4(27).toText());
EXPECT_EQ("255.255.255.240", getNetmask4(28).toText());
EXPECT_EQ("255.255.255.248", getNetmask4(29).toText());
EXPECT_EQ("255.255.255.252", getNetmask4(30).toText());
EXPECT_EQ("255.255.255.254", getNetmask4(31).toText());
EXPECT_EQ("255.255.255.255", getNetmask4(32).toText());
EXPECT_THROW(getNetmask4(33), isc::BadValue);
}
// Checks if the calculation for IPv4 addresses in range are correct.
TEST(AddrUtilitiesTest, addrsInRange4) {
// Let's start with something simple
EXPECT_EQ(1, addrsInRange(IOAddress("192.0.2.0"), IOAddress("192.0.2.0")));
EXPECT_EQ(10, addrsInRange(IOAddress("192.0.2.10"), IOAddress("192.0.2.19")));
EXPECT_EQ(256, addrsInRange(IOAddress("192.0.2.0"), IOAddress("192.0.2.255")));
EXPECT_EQ(65536, addrsInRange(IOAddress("192.0.0.0"), IOAddress("192.0.255.255")));
EXPECT_EQ(16777216, addrsInRange(IOAddress("10.0.0.0"), IOAddress("10.255.255.255")));
// Let's check if the network boundaries are crossed correctly.
EXPECT_EQ(3, addrsInRange(IOAddress("10.0.0.255"), IOAddress("10.0.1.1")));
// Let's go a bit overboard with this! How many addresses are there in
// IPv4 address space? That's a slightly tricky question, as the answer
// cannot be stored in uint32_t.
EXPECT_EQ(uint64_t(std::numeric_limits<uint32_t>::max()) + 1,
addrsInRange(IOAddress("0.0.0.0"), IOAddress("255.255.255.255")));
// The upper bound cannot be smaller than the lower bound.
EXPECT_THROW(addrsInRange(IOAddress("192.0.2.5"), IOAddress("192.0.2.4")),
isc::BadValue);
}
// Checks if the calculation for IPv6 addresses in range are correct.
TEST(AddrUtilitiesTest, addrsInRange6) {
// Let's start with something simple
EXPECT_EQ(1, addrsInRange(IOAddress("::"), IOAddress("::")));
EXPECT_EQ(16, addrsInRange(IOAddress("fe80::1"), IOAddress("fe80::10")));
EXPECT_EQ(65536, addrsInRange(IOAddress("fe80::"), IOAddress("fe80::ffff")));
EXPECT_EQ(uint64_t(std::numeric_limits<uint32_t>::max()) + 1,
addrsInRange(IOAddress("fe80::"), IOAddress("fe80::ffff:ffff")));
// There's 2^80 addresses between those. Due to uint64_t limits, this method is
// capped at 2^64 -1.
EXPECT_EQ(std::numeric_limits<uint64_t>::max(),
addrsInRange(IOAddress("2001:db8:1::"), IOAddress("2001:db8:2::")));
// Let's check if the network boundaries are crossed correctly.
EXPECT_EQ(3, addrsInRange(IOAddress("2001:db8::ffff"), IOAddress("2001:db8::1:1")));
// Let's go a bit overboard with this! How many addresses are there in
// IPv6 address space? That's a really tricky question, as the answer
// wouldn't fit even in uint128_t (if we had it). This method is capped
// at max value of uint64_t.
EXPECT_EQ(std::numeric_limits<uint64_t>::max(), addrsInRange(IOAddress("::"),
IOAddress("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")));
EXPECT_THROW(addrsInRange(IOAddress("fe80::5"), IOAddress("fe80::4")),
isc::BadValue);
}
// Checks if prefixInRange returns valid number of prefixes in specified range.
TEST(AddrUtilitiesTest, prefixesInRange) {
// How many /64 prefixes are in /64 pool?
EXPECT_EQ(1, prefixesInRange(64, 64));
// How many /63 prefixes are in /64 pool?
EXPECT_EQ(2, prefixesInRange(63, 64));
// How many /64 prefixes are in /48 pool?
EXPECT_EQ(65536, prefixesInRange(48, 64));
// How many /127 prefixes are in /64 pool?
EXPECT_EQ(uint64_t(9223372036854775808ull), prefixesInRange(64, 127));
// How many /128 prefixes are in /64 pool?
EXPECT_EQ(std::numeric_limits<uint64_t>::max(),
prefixesInRange(64, 128));
// Let's go overboard again. How many IPv6 addresses are there?
EXPECT_EQ(std::numeric_limits<uint64_t>::max(),
prefixesInRange(0, 128));
}
}; // end of anonymous namespace
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