From 07c92e70b57966a8adc78ddb5b454237bb13ba7d Mon Sep 17 00:00:00 2001
From: Harish Kumara M <h.marappa@samsung.com>
Date: Fri, 4 Jan 2019 19:52:45 +0530
Subject: [PATCH] Option to skip close TCP on IF down.

This is VD specific requirement, not to close TCP
servers when interface down event is received.
New API "CAUtilSkipTCPCloseOnInterfaceDown" is
defined using which application can enable/disable
skip TCP server feature.

Signed-off-by: Harish Kumara M <h.marappa@samsung.com>

fix: save build error

https://github.sec.samsung.net/RS7-IOTIVITY/IoTivity/pull/388
(cherry picked from commit 725041caab8e0c1f14c6333cd066ea61a845893d)

Change-Id: Ifaf37379955d0d5615f08d43824148b6cbe075d3
Signed-off-by: Harish Kumara M <h.marappa@samsung.com>
Signed-off-by: Amit KS <amit.s12@samsung.com>
---
 resource/csdk/connectivity/api/cautilinterface.h   |  9 ++++
 resource/csdk/connectivity/inc/catcpadapter.h      |  9 ++++
 .../connectivity/src/tcp_adapter/catcpadapter.c    | 50 +++++++++++++++++++++-
 .../csdk/connectivity/util/src/cautilinterface.c   | 10 +++++
 4 files changed, 77 insertions(+), 1 deletion(-)

diff --git a/resource/csdk/connectivity/api/cautilinterface.h b/resource/csdk/connectivity/api/cautilinterface.h
index 324ce53..341fdbb 100644
--- a/resource/csdk/connectivity/api/cautilinterface.h
+++ b/resource/csdk/connectivity/api/cautilinterface.h
@@ -330,6 +330,15 @@ CAResult_t CAUtilTCPDisconnectSession(const char *address,
                                       uint16_t port,
                                       CATransportFlags_t flags);
 
+/**
+ * Enable or disable skip closing TCP servers
+ * when network interface is down.
+ *
+ * @param[in]   state    true to skip closing TCP servers,
+ *                       otherwise false.
+ */
+void CAUtilSkipTCPCloseOnInterfaceDown(bool state);
+
 CAResult_t CAUtilStartGattServer();
 CAResult_t CAUtilStopGattServer();
 
diff --git a/resource/csdk/connectivity/inc/catcpadapter.h b/resource/csdk/connectivity/inc/catcpadapter.h
index d1e7d20..00f1cf3 100644
--- a/resource/csdk/connectivity/inc/catcpadapter.h
+++ b/resource/csdk/connectivity/inc/catcpadapter.h
@@ -113,6 +113,15 @@ CAResult_t CAStartTCP();
 CAResult_t CATCPDisconnectSession(const CAEndpoint_t *endpoint);
 
 /**
+ * Enable or disable skip closing TCP servers
+ * when network interface is down.
+ *
+ * @param[in]   state    true to skip closing TCP servers,
+ *                       otherwise false.
+ */
+void CATCPSkipCloseOnInterfaceDown(bool state);
+
+/**
  * Start listening server for receiving connect requests.
  * Transport Specific Behavior:
  * TCP Starts Listening Server on a particular interface and prefixed port
diff --git a/resource/csdk/connectivity/src/tcp_adapter/catcpadapter.c b/resource/csdk/connectivity/src/tcp_adapter/catcpadapter.c
index 5fc9828..0e33b46 100644
--- a/resource/csdk/connectivity/src/tcp_adapter/catcpadapter.c
+++ b/resource/csdk/connectivity/src/tcp_adapter/catcpadapter.c
@@ -64,6 +64,16 @@ typedef struct
 #define CA_TCP_SELECT_TIMEOUT 10
 
 /**
+ * Mutex to synchronize TCP adapter access.
+ */
+static oc_mutex g_mutexAdapter = NULL;
+
+/**
+ * State to control closing of TCP servers on interface down event.
+ */
+static bool g_skipCloseOnIFDown;
+
+/**
  * Queue handle for Send Data.
  */
 static CAQueueingThread_t *g_sendQueueHandle = NULL;
@@ -290,7 +300,16 @@ void CATCPAdapterHandler(CATransportAdapter_t adapter, CANetworkStatus_t status)
             OIC_LOG_V(ERROR, TAG, "CAQueueingThreadClearData failed[%d]", res);
         }
 
-        CATCPStopServer();
+        oc_mutex_lock(g_mutexAdapter);
+        if (!g_skipCloseOnIFDown)
+        {
+            CATCPStopServer();
+        }
+        else
+        {
+            OIC_LOG(INFO, TAG, "Skip closing servers!");
+        }
+        oc_mutex_unlock(g_mutexAdapter);
     }
     else if (CA_INTERFACE_UP == status)
     {
@@ -364,6 +383,19 @@ CAResult_t CAInitializeTCP(CARegisterConnectivityCallback registerCallback,
 
     CAInitializeTCPGlobals();
 
+    // Create Mutex for synchronize access at adapter level
+    if (!g_mutexAdapter)
+    {
+        g_mutexAdapter = oc_mutex_new();
+        if (!g_mutexAdapter)
+        {
+            OIC_LOG(ERROR, TAG, "Failed to create mutex!");
+            return CA_STATUS_FAILED;
+        }
+    }
+
+    g_skipCloseOnIFDown = false;
+
     CAResult_t res = CATCPCreateMutex();
     if (CA_STATUS_OK == res)
     {
@@ -510,6 +542,13 @@ CAResult_t CATCPDisconnectSession(const CAEndpoint_t *endpoint)
     return res;
 }
 
+void CATCPSkipCloseOnInterfaceDown(bool state)
+{
+    oc_mutex_lock(g_mutexAdapter);
+    g_skipCloseOnIFDown = state;
+    oc_mutex_unlock(g_mutexAdapter);
+}
+
 CAResult_t CAStartTCPListeningServer()
 {
 #if !defined(SINGLE_THREAD) && !defined(DISABLE_TCP_SERVER)
@@ -651,6 +690,15 @@ void CATerminateTCP()
 
     CATCPDestroySendMutex();
     CATCPDestroySendCond();
+
+    g_skipCloseOnIFDown = false;
+
+    // Free adapter mutex
+    if (g_mutexAdapter)
+    {
+        oc_mutex_free(g_mutexAdapter);
+        g_mutexAdapter = NULL;
+    }
 }
 
 void CATCPSendDataThread(void *threadData)
diff --git a/resource/csdk/connectivity/util/src/cautilinterface.c b/resource/csdk/connectivity/util/src/cautilinterface.c
index 806b5b1..4724dfc 100644
--- a/resource/csdk/connectivity/util/src/cautilinterface.c
+++ b/resource/csdk/connectivity/util/src/cautilinterface.c
@@ -464,6 +464,16 @@ CAResult_t CAUtilTCPDisconnectSession(const char *address, uint16_t port, CATran
 #endif
 }
 
+void CAUtilSkipTCPCloseOnInterfaceDown(bool state)
+{
+#ifdef TCP_ADAPTER
+    CATCPSkipCloseOnInterfaceDown(state);
+#else
+    (void) state;
+    OIC_LOG(DEBUG, TAG, "Not supported!");
+#endif
+}
+
 CAResult_t CAUtilStartGattServer()
 {
 	OIC_LOG(DEBUG, TAG, "CAUtilStartGattServer");
-- 
2.7.4