[libc] add IPV6 related macros

Author: c8ef

libc/include/llvm-libc-macros/netinet-in-macros.h

@@ -16,4 +16,12 @@
 #define IPPROTO_IPV6 41
 #define IPPROTO_RAW 255
 
+#define IPV6_UNICAST_HOPS 16
+#define IPV6_MULTICAST_IF 17
+#define IPV6_MULTICAST_HOPS 18
+#define IPV6_MULTICAST_LOOP 19
+#define IPV6_JOIN_GROUP 20
+#define IPV6_LEAVE_GROUP 21
+#define IPV6_V6ONLY 26
+
 #endif // LLVM_LIBC_MACROS_NETINET_IN_MACROS_H

libc/test/include/netinet_in_test.cpp

@@ -17,3 +17,13 @@ TEST(LlvmLibcNetinetInTest, IPPROTOMacro) {
   EXPECT_EQ(IPPROTO_IPV6, 41);
   EXPECT_EQ(IPPROTO_RAW, 255);
 }
+
+TEST(LlvmLibcNetinetInTest, IPV6Macro) {
+  EXPECT_EQ(IPV6_UNICAST_HOPS, 16);
+  EXPECT_EQ(IPV6_MULTICAST_IF, 17);
+  EXPECT_EQ(IPV6_MULTICAST_HOPS, 18);
+  EXPECT_EQ(IPV6_MULTICAST_LOOP, 19);
+  EXPECT_EQ(IPV6_JOIN_GROUP, 20);
+  EXPECT_EQ(IPV6_LEAVE_GROUP, 21);
+  EXPECT_EQ(IPV6_V6ONLY, 26);
+}