New NativeDaemonConnector protocol adds a seqnum.

Allows for one socket to be multiplexed for multiple requests.
Doesn't use command sequence numbers for broadcasts - would make no sense.
Doesn't alter current default behavior so OEM's using these classes
won't notice a difference.
bug:5864209

Change-Id: Ie3b19c4f81eea868569229a365c8cb7de249c2dd

1 files changed, 15 insertions, 2 deletions

diff --git a/include/sysutils/SocketClient.h b/include/sysutils/SocketClient.h
index 7d2b1d6..6473b3a 100644
--- a/include/sysutils/SocketClient.h
+++ b/include/sysutils/SocketClient.h
@@ -4,6 +4,7 @@
 #include "../../../frameworks/base/include/utils/List.h"
 
 #include <pthread.h>
+#include <cutils/atomic.h>
 #include <sys/types.h>
 
 class SocketClient {
@@ -24,20 +25,27 @@ class SocketClient {
     pthread_mutex_t mRefCountMutex;
     int mRefCount;
 
+    int mCmdNum;
+
+    bool mUseCmdNum;
+
 public:
     SocketClient(int sock, bool owned);
+    SocketClient(int sock, bool owned, bool useCmdNum);
     virtual ~SocketClient();
 
     int getSocket() { return mSocket; }
     pid_t getPid() const { return mPid; }
     uid_t getUid() const { return mUid; }
     gid_t getGid() const { return mGid; }
+    void setCmdNum(int cmdNum) { android_atomic_release_store(cmdNum, &mCmdNum); }
+    int getCmdNum() { return mCmdNum; }
 
     // Send null-terminated C strings:
     int sendMsg(int code, const char *msg, bool addErrno);
-    int sendMsg(const char *msg);
+    int sendMsg(int code, const char *msg, bool addErrno, bool useCmdNum);
 
-    // Sending binary data:
+    //Sending binary data:
     int sendData(const void *data, int len);
 
     // Optional reference counting.  Reference count starts at 1.  If
@@ -46,6 +54,11 @@ public:
     // decRef() when it's done with the client.
     void incRef();
     bool decRef(); // returns true at 0 (but note: SocketClient already deleted)
+
+private:
+    // Send null-terminated C strings
+    int sendMsg(const char *msg);
+    void init(int socket, bool owned, bool useCmdNum);
 };
 
 typedef android::List<SocketClient *> SocketClientCollection;