From 80dbd06f649eae9d7be036d74d7571533d9f9e54 Mon Sep 17 00:00:00 2001
From: Xiao Ma <xiaom@google.com>
Date: Thu, 27 Jul 2023 14:51:53 +0900
Subject: [PATCH] Add Ipv6PktInfo (in6_pktinfo) struct.

in6_pktinfo structure specifies the source IPv6 address and interface
for an outgoing packet(used with UDP or RAW socket), we can specify the
IPV6_PKTINFO ancillary data on sendmsg() with this structure to set the
source address (e.g. a global IPv6 address).

Bug: 293393743
Test: TH
Change-Id: I2bd8ea6fcdb7398db9b3a54243c81ca27e832e45
---
 .../net/module/util/structs/Ipv6PktInfo.java  | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 staticlibs/device/com/android/net/module/util/structs/Ipv6PktInfo.java

diff --git a/staticlibs/device/com/android/net/module/util/structs/Ipv6PktInfo.java b/staticlibs/device/com/android/net/module/util/structs/Ipv6PktInfo.java
new file mode 100644
index 0000000000..0dccb72723
--- /dev/null
+++ b/staticlibs/device/com/android/net/module/util/structs/Ipv6PktInfo.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.net.module.util.structs;
+
+import com.android.net.module.util.Struct;
+import com.android.net.module.util.Struct.Field;
+import com.android.net.module.util.Struct.Type;
+
+import java.net.Inet6Address;
+
+/**
+ * structure in6_pktinfo
+ *
+ * see also:
+ *
+ *     include/uapi/linux/ipv6.h
+ */
+public class Ipv6PktInfo extends Struct {
+    @Field(order = 0, type = Type.Ipv6Address)
+    public final Inet6Address addr; // IPv6 source or destination address
+    @Field(order = 1, type = Type.S32)
+    public final int ifindex;       // interface index
+
+    public Ipv6PktInfo(final Inet6Address addr, final int ifindex) {
+        this.addr = addr;
+        this.ifindex = ifindex;
+    }
+}