From 731d831e91d5d9f8b15ca95367977abe35967166 Mon Sep 17 00:00:00 2001
From: Ashish Sharma <ashishsharma@google.com>
Date: Tue, 10 Apr 2012 18:59:16 -0700
Subject: [PATCH] libsysutils: NetlinkEvent: add support for interface
 xt_IDLETIMER events.

xt_IDLETIMER events are used to infer the interface (radio) state
based on a inactivity timeout value.

Change-Id: I755eb54a048ca1c6ce0c646564d61188d8241851
---
 include/sysutils/NetlinkEvent.h  |  2 ++
 libsysutils/src/NetlinkEvent.cpp | 14 +++++++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/include/sysutils/NetlinkEvent.h b/include/sysutils/NetlinkEvent.h
index 25a56f771..3494a9c5e 100644
--- a/include/sysutils/NetlinkEvent.h
+++ b/include/sysutils/NetlinkEvent.h
@@ -34,6 +34,8 @@ public:
     const static int NlActionChange;
     const static int NlActionLinkDown;
     const static int NlActionLinkUp;
+    const static int NlActionIfaceActive;
+    const static int NlActionIfaceIdle;
 
     NetlinkEvent();
     virtual ~NetlinkEvent();
diff --git a/libsysutils/src/NetlinkEvent.cpp b/libsysutils/src/NetlinkEvent.cpp
index 4beebb73d..643971134 100644
--- a/libsysutils/src/NetlinkEvent.cpp
+++ b/libsysutils/src/NetlinkEvent.cpp
@@ -25,6 +25,7 @@
 #include <sys/socket.h>
 #include <linux/if.h>
 #include <linux/netfilter/nfnetlink.h>
+#include <linux/netfilter/xt_IDLETIMER.h>
 #include <linux/netfilter_ipv4/ipt_ULOG.h>
 /* From kernel's net/netfilter/xt_quota2.c */
 const int QLOG_NL_EVENT  = 112;
@@ -38,6 +39,8 @@ const int NetlinkEvent::NlActionRemove = 2;
 const int NetlinkEvent::NlActionChange = 3;
 const int NetlinkEvent::NlActionLinkUp = 4;
 const int NetlinkEvent::NlActionLinkDown = 5;
+const int NetlinkEvent::NlActionIfaceActive = 6;
+const int NetlinkEvent::NlActionIfaceIdle = 7;
 
 NetlinkEvent::NetlinkEvent() {
     mAction = NlActionUnknown;
@@ -70,7 +73,8 @@ void NetlinkEvent::dump() {
 }
 
 /*
- * Parse an binary message from a NETLINK_ROUTE netlink socket.
+ * Parse an binary message from a NETLINK_ROUTE netlink socket
+ * and IDLETIMER netlink socket.
  */
 bool NetlinkEvent::parseBinaryNetlinkMessage(char *buffer, int size) {
     size_t sz = size;
@@ -127,6 +131,14 @@ bool NetlinkEvent::parseBinaryNetlinkMessage(char *buffer, int size) {
             mSubsystem = strdup("qlog");
             mAction = NlActionChange;
 
+        } else if (nh->nlmsg_type == NL_EVENT_TYPE_ACTIVE
+                   || nh->nlmsg_type == NL_EVENT_TYPE_INACTIVE) {
+            char *ifacename;
+            ifacename = (char *)NLMSG_DATA(nh);
+            asprintf(&mParams[0], "INTERFACE=%s", ifacename);
+            mSubsystem = strdup("idletimer");
+            mAction = (nh->nlmsg_type == NL_EVENT_TYPE_ACTIVE) ?
+              NlActionIfaceActive : NlActionIfaceIdle;
         } else {
                 SLOGD("Unexpected netlink message. type=0x%x\n", nh->nlmsg_type);
         }