commit c870ac3895d51e45cc6aa5d7547c47fcb677d4ea
author William A. Kennington III <wak@google.com> Sat Jun 17 17:13:45 2023 -0700
committer William A. Kennington III <wak@google.com> Fri Jun 23 01:04:21 2023 -0700
tree 93c309b9768c270ae70bcf3e6b7cf8df8f92dd38
parent 459bd0dddd4046e068181dcd3e9f2555a646d9b4

net/addr/subnet: Add netmask functions

Change-Id: I1319e02655796a842769c2f01869b21d0a2151f4
Signed-off-by: William A. Kennington III <wak@google.com>

test/net/addr/subnet.cpp

diff --git a/test/net/addr/subnet.cpp b/test/net/addr/subnet.cpp
index 319a514..ca2fa20 100644
--- a/test/net/addr/subnet.cpp
+++ b/test/net/addr/subnet.cpp
@@ -224,4 +224,15 @@
               fmt::format("a {} b", SubnetAny(In4Addr{1, 2, 3, 4}, 32)));
 }
 
+TEST(Ops, MaskToPfx)
+{
+    EXPECT_EQ(32, maskToPfx(In4Addr{0xff, 0xff, 0xff, 0xff}));
+    EXPECT_EQ(28, maskToPfx(In4Addr{0xff, 0xff, 0xff, 0xf0}));
+    EXPECT_EQ(16, maskToPfx(In4Addr{0xff, 0xff, 0, 0}));
+    EXPECT_EQ(0, maskToPfx(In4Addr{}));
+
+    EXPECT_THROW(maskToPfx(In4Addr{0, 0x8}), std::invalid_argument);
+    EXPECT_THROW(maskToPfx(In4Addr{0x40}), std::invalid_argument);
+}
+
 } // namespace stdplus