Add more tests for IPv4 mapped IPv6 literals in proxy resolution.

Bug: 997359
Change-Id: I6d6dbe7d9ee75b82506530529318044873a28f39
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1769703
Commit-Queue: Eric Roman <eroman@chromium.org>
Reviewed-by: Matt Menke <mmenke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#690132}

net/proxy_resolution/proxy_bypass_rules_unittest.cc

@@ -94,6 +94,13 @@ void ExpectBypassMisc(
     "[FD80::1]",
     "foo",
     "www.example3.com",
+    // TODO(crbug.com/997359): This should be moved into
+    // ExpectBypassLocalHost().
+    "[::ffff:127.0.0.1]",
+    "[::ffff:127.100.0.0]",
+    // TODO(crbug.com/997359): This should be moved into
+    // ExpectBypassLinkLocal().
+    "[::ffff:169.254.3.2]",
 #if !defined(BYPASS_LOOPBACK)
     "loopback",
     "loopback.",
@@ -379,6 +386,7 @@ TEST(ProxyBypassRulesTest, ParseAndMatchCIDR_IPv4) {
   EXPECT_TRUE(rules.Matches(GURL("http://192.168.1.1")));
   EXPECT_TRUE(rules.Matches(GURL("ftp://192.168.4.4")));
   EXPECT_TRUE(rules.Matches(GURL("https://192.168.0.0:81")));
+  // Test that an IPv4 mapped IPv6 literal matches an IPv4 CIDR rule.
   EXPECT_TRUE(rules.Matches(GURL("http://[::ffff:192.168.11.11]")));
 
   EXPECT_FALSE(rules.Matches(GURL("http://foobar.com")));
@@ -396,6 +404,21 @@ TEST(ProxyBypassRulesTest, ParseAndMatchCIDR_IPv6) {
   EXPECT_TRUE(rules.Matches(GURL("http://[A:b:C:9::]")));
   EXPECT_FALSE(rules.Matches(GURL("http://foobar.com")));
   EXPECT_FALSE(rules.Matches(GURL("http://192.169.1.1")));
+
+  // Test that an IPv4 literal matches an IPv4 mapped IPv6 CIDR rule.
+  // This is the IPv4 mapped equivalent to 192.168.1.1/16.
+  rules.ParseFromString("::ffff:192.168.1.1/112");
+  EXPECT_TRUE(rules.Matches(GURL("http://[::ffff:192.168.1.3]")));
+  EXPECT_TRUE(rules.Matches(GURL("http://192.168.11.11")));
+  EXPECT_FALSE(rules.Matches(GURL("http://10.10.1.1")));
+
+  // Test using an IP range that is close to IPv4 mapped, but not
+  // quite. Should not result in matches.
+  rules.ParseFromString("::fffe:192.168.1.1/112");
+  EXPECT_TRUE(rules.Matches(GURL("http://[::fffe:192.168.1.3]")));
+  EXPECT_FALSE(rules.Matches(GURL("http://[::ffff:192.168.1.3]")));
+  EXPECT_FALSE(rules.Matches(GURL("http://192.168.11.11")));
+  EXPECT_FALSE(rules.Matches(GURL("http://10.10.1.1")));
 }
 
 // Test that parsing an IPv6 range given a bracketed literal is not supported.