From 1ea57ad67406b3aaaef5254bc2fa7e4134f3a6df Mon Sep 17 00:00:00 2001 From: Vasil Dimov Date: Mon, 24 Aug 2020 21:03:31 +0200 Subject: net: don't accept non-left-contiguous netmasks A netmask that contains 1-bits after 0-bits (the 1-bits are not contiguous on the left side) is invalid [1] [2]. The code before this PR used to parse and accept such non-left-contiguous netmasks. However, a coming change that will alter `CNetAddr::ip` to have flexible size would make juggling with such netmasks more difficult, thus drop support for those. [1] https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing#Subnet_masks [2] https://tools.ietf.org/html/rfc4632#section-5.1 --- src/test/netbase_tests.cpp | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) (limited to 'src/test/netbase_tests.cpp') diff --git a/src/test/netbase_tests.cpp b/src/test/netbase_tests.cpp index 49073ea657..8041c2e3ed 100644 --- a/src/test/netbase_tests.cpp +++ b/src/test/netbase_tests.cpp @@ -290,11 +290,13 @@ BOOST_AUTO_TEST_CASE(subnet_test) BOOST_CHECK_EQUAL(subnet.ToString(), "1::/16"); subnet = ResolveSubNet("1:2:3:4:5:6:7:8/0000:0000:0000:0000:0000:0000:0000:0000"); BOOST_CHECK_EQUAL(subnet.ToString(), "::/0"); + // Invalid netmasks (with 1-bits after 0-bits) subnet = ResolveSubNet("1.2.3.4/255.255.232.0"); - BOOST_CHECK_EQUAL(subnet.ToString(), "1.2.0.0/255.255.232.0"); + BOOST_CHECK(!subnet.IsValid()); + subnet = ResolveSubNet("1.2.3.4/255.0.255.255"); + BOOST_CHECK(!subnet.IsValid()); subnet = ResolveSubNet("1:2:3:4:5:6:7:8/ffff:ffff:ffff:fffe:ffff:ffff:ffff:ff0f"); - BOOST_CHECK_EQUAL(subnet.ToString(), "1:2:3:4:5:6:7:8/ffff:ffff:ffff:fffe:ffff:ffff:ffff:ff0f"); - + BOOST_CHECK(!subnet.IsValid()); } BOOST_AUTO_TEST_CASE(netbase_getgroup) -- cgit v1.2.3