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[#969] Fixed PrefixRange constructor

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This commit is contained in:
Marcin Siodelski
2023-01-05 21:39:10 +01:00
parent ed747426c3
commit eb79d24d49
2 changed files with 40 additions and 7 deletions
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8
src/lib/dhcpsrv/ip_range.cc
View File

@@ -45,9 +45,7 @@ PrefixRange::PrefixRange(const asiolink::IOAddress& prefix, const uint8_t length
<< " must not be greater than 128");
}
// Now calculate the last prefix in the range.
auto prefixes_num = prefixesInRange(prefix_length_, delegated_length_);
uint64_t addrs_in_prefix = static_cast<uint64_t>(1) << (128 - delegated_length_);
end_ = offsetAddress(prefix, (prefixes_num - 1) * addrs_in_prefix);
end_ = lastAddrInPrefix(prefix, length);
}
PrefixRange::PrefixRange(const asiolink::IOAddress& start, const asiolink::IOAddress& end,
@@ -62,6 +60,10 @@ PrefixRange::PrefixRange(const asiolink::IOAddress& start, const asiolink::IOAdd
if (end_ < start_) {
isc_throw(BadValue, "invalid address range boundaries " << start_ << ":" << end_);
}
if (prefix_length_ > 128) {
isc_throw(BadValue, "the " << start_ << ":" << end_
<< " does not constitute a valid prefix delegation range");
}
if (delegated_length_ > 128) {
isc_throw(BadValue, "delegated length " << static_cast<int>(delegated_length_)
<< " must not be greater than 128");

39
src/lib/dhcpsrv/tests/ip_range_unittest.cc
View File

@@ -34,15 +34,39 @@ TEST(PrefixRangeTest, constructor) {
boost::scoped_ptr<PrefixRange> range;
ASSERT_NO_THROW(range.reset(new PrefixRange(IOAddress("2001:db8:1::"), 64, 96)));
EXPECT_EQ("2001:db8:1::", range->start_.toText());
EXPECT_EQ("2001:db8:1:0:ffff:ffff::", range->end_.toText());
EXPECT_EQ("2001:db8:1:0:ffff:ffff:ffff:ffff", range->end_.toText());
EXPECT_EQ(64, range->prefix_length_);
EXPECT_EQ(96, range->delegated_length_);
ASSERT_NO_THROW(range.reset(new PrefixRange(IOAddress("2001:db8:1:2::"), 80, 120)));
EXPECT_EQ("2001:db8:1:2::", range->start_.toText());
EXPECT_EQ("2001:db8:1:2:0:ffff:ffff:ff00", range->end_.toText());
EXPECT_EQ("2001:db8:1:2:0:ffff:ffff:ffff", range->end_.toText());
EXPECT_EQ(80, range->prefix_length_);
EXPECT_EQ(120, range->delegated_length_);
ASSERT_NO_THROW(range.reset(new PrefixRange(IOAddress("2001:db8:1:2::"), 80, 127)));
ASSERT_NO_THROW(range.reset(new PrefixRange(IOAddress("2001:db8:1:2::"), 120, 127)));
EXPECT_EQ("2001:db8:1:2::", range->start_.toText());
EXPECT_EQ("2001:db8:1:2:0:ffff:ffff:fffe", range->end_.toText());
EXPECT_EQ("2001:db8:1:2::ff", range->end_.toText());
EXPECT_EQ(120, range->prefix_length_);
EXPECT_EQ(127, range->delegated_length_);
ASSERT_NO_THROW(range.reset(new PrefixRange(IOAddress("2001:db8:1::"), IOAddress("2001:db8:1:0:ffff:ffff:ffff:ffff"), 96)));
EXPECT_EQ("2001:db8:1::", range->start_.toText());
EXPECT_EQ("2001:db8:1:0:ffff:ffff:ffff:ffff", range->end_.toText());
EXPECT_EQ(64, range->prefix_length_);
EXPECT_EQ(96, range->delegated_length_);
ASSERT_NO_THROW(range.reset(new PrefixRange(IOAddress("2001:db8:1:2::"), IOAddress("2001:db8:1:2:0:ffff:ffff:ffff"), 120)));
EXPECT_EQ("2001:db8:1:2::", range->start_.toText());
EXPECT_EQ("2001:db8:1:2:0:ffff:ffff:ffff", range->end_.toText());
EXPECT_EQ(80, range->prefix_length_);
EXPECT_EQ(120, range->delegated_length_);
ASSERT_NO_THROW(range.reset(new PrefixRange(IOAddress("2001:db8:1:2::"), IOAddress("2001:db8:1:2::ff"), 127)));
EXPECT_EQ("2001:db8:1:2::", range->start_.toText());
EXPECT_EQ("2001:db8:1:2::ff", range->end_.toText());
EXPECT_EQ(120, range->prefix_length_);
EXPECT_EQ(127, range->delegated_length_);
}
// This test verifies that exception is thrown upon an attempt to
@@ -58,6 +82,13 @@ TEST(PrefixRangeTest, constructorWithInvalidValues) {
// End must not be lower than start.
EXPECT_THROW(PrefixRange(IOAddress("2001:db8:1:1::6:0"), IOAddress("2001:db8:1::5:0"), 112),
BadValue);
// Length must not exceed 128.
EXPECT_THROW(PrefixRange(IOAddress("2001:db8:1:1::"), IOAddress("2001:db8:1:f::"), 200),
BadValue);
// The upper boundary of the prefix range must have non-significant
// bits set to 1.
EXPECT_THROW(PrefixRange(IOAddress("2001:db8:1:1::"), IOAddress("2001:db8:1:1::ff00"), 112),
BadValue);
}
} // end of anonymous namespace