cc3200: Reset the servers and close user sockets on WLAN disconection.

This is needed to avoid half-open connections.

cc3200/ftp/ftp.c

@@ -224,7 +224,6 @@ static ftp_result_t ftp_list_dir (char *list, uint32_t maxlistsize, uint32_t *li
 static void ftp_open_child (char *pwd, char *dir);
 static void ftp_close_child (char *pwd);
 static void ftp_return_to_previous_path (char *pwd, char *dir);
-static void ftp_reset (void);
 
 /******************************************************************************
  DEFINE PUBLIC FUNCTIONS
@@ -408,6 +407,16 @@ void ftp_disable (void) {
     ftp_data.state = E_FTP_STE_DISABLED;
 }
 
+void ftp_reset (void) {
+    // close all connections and start all over again
+    servers_close_socket(&ftp_data.lc_sd);
+    servers_close_socket(&ftp_data.ld_sd);
+    ftp_close_cmd_data();
+    ftp_data.state = E_FTP_STE_START;
+    ftp_data.substate.data = E_FTP_STE_SUB_DISCONNECTED;
+    SOCKETFIFO_Flush();
+}
+
 /******************************************************************************
  DEFINE PRIVATE FUNCTIONS
  ******************************************************************************/
@@ -1079,12 +1088,3 @@ static void ftp_return_to_previous_path (char *pwd, char *dir) {
     }
 }
 
-static void ftp_reset (void) {
-    // close all connections and start all over again
-    servers_close_socket(&ftp_data.lc_sd);
-    servers_close_socket(&ftp_data.ld_sd);
-    ftp_close_cmd_data();
-    ftp_data.state = E_FTP_STE_START;
-    ftp_data.substate.data = E_FTP_STE_SUB_DISCONNECTED;
-    SOCKETFIFO_Flush();
-}

cc3200/ftp/ftp.h

@@ -34,5 +34,6 @@ extern void ftp_init (void);
 extern void ftp_run (void);
 extern void ftp_enable (void);
 extern void ftp_disable (void);
+extern void ftp_reset (void);
 
 #endif /* FTP_H_ */

cc3200/mods/modusocket.c

@@ -94,7 +94,6 @@ void modusocket_enter_sleep (void) {
     fd_set socketset;
     int16_t maxfd = 0;
 
-    sl_LockObjLock (&modusocket_LockObj, SL_OS_WAIT_FOREVER);
     for (int i = 0; i < MOD_NETWORK_MAX_SOCKETS; i++) {
         int16_t sd;
         if ((sd = modusocket_sockets[i].sd) >= 0) {
@@ -105,7 +104,6 @@ void modusocket_enter_sleep (void) {
 
     // wait for any of the sockets to become ready...
     sl_Select(maxfd + 1, &socketset, NULL, NULL, NULL);
-    sl_LockObjUnlock (&modusocket_LockObj);
 }
 
 void modusocket_close_all_user_sockets (void) {

cc3200/mods/modwlan.c

@@ -230,7 +230,7 @@ void SimpleLinkWlanEventHandler(SlWlanEvent_t *pWlanEvent) {
         {
             CLR_STATUS_BIT(wlan_obj.status, STATUS_BIT_CONNECTION);
             CLR_STATUS_BIT(wlan_obj.status, STATUS_BIT_IP_ACQUIRED);
-            // TODO reset the servers
+            servers_reset();
         }
             break;
         case SL_WLAN_STA_CONNECTED_EVENT:
@@ -245,7 +245,7 @@ void SimpleLinkWlanEventHandler(SlWlanEvent_t *pWlanEvent) {
             break;
         case SL_WLAN_STA_DISCONNECTED_EVENT:
             wlan_obj.staconnected = false;
-            // TODO reset the servers
+            servers_reset();
             break;
         case SL_WLAN_P2P_DEV_FOUND_EVENT:
             // TODO

cc3200/serverstask.c

@@ -53,12 +53,13 @@ typedef struct {
     volatile bool enabled;
     volatile bool do_disable;
     volatile bool do_enable;
+    volatile bool do_reset;
 }servers_Data_t;
 
 /******************************************************************************
  DECLARE PRIVATE DATA
  ******************************************************************************/
-static servers_Data_t servers_data = {.enabled = false, .do_disable = false, .do_enable = false};
+static servers_Data_t servers_data = {.enabled = false, .do_disable = false, .do_enable = false, .do_reset = false};
 static volatile bool sleep_sockets = false;
 
 /******************************************************************************
@@ -103,11 +104,21 @@ void TASK_Servers (void *pvParameters) {
             servers_data.enabled = false;
         }
 
-        if (cycle) {
-            telnet_run();
+        if (servers_data.do_reset) {
+            telnet_reset();
+            ftp_reset();
+            servers_data.do_reset = false;
+            // resetting the servers is needed to preven half-open sockets
+            // and we should also close all user sockets
+            modusocket_close_all_user_sockets();
         }
         else {
-            ftp_run();
+            if (cycle) {
+                telnet_run();
+            }
+            else {
+                ftp_run();
+            }
         }
 
         // set the alive flag for the wdt
@@ -137,6 +148,10 @@ void servers_stop (void) {
     HAL_Delay (SERVERS_CYCLE_TIME_MS * 5);
 }
 
+void servers_reset (void) {
+    servers_data.do_reset = true;
+}
+
 bool servers_are_enabled (void) {
     return servers_data.enabled;
 }

cc3200/serverstask.h

@@ -56,6 +56,7 @@ extern char servers_pass[];
 extern void TASK_Servers (void *pvParameters);
 extern void servers_start (void);
 extern void servers_stop (void);
+extern void servers_reset (void);
 extern bool servers_are_enabled (void);
 extern void servers_close_socket (int16_t *sd);
 extern void servers_set_login (char *user, char *pass);

cc3200/telnet/telnet.c

@@ -132,7 +132,6 @@ static void telnet_process (void);
 static int telnet_process_credential (char *credential, _i16 rxLen);
 static void telnet_parse_input (uint8_t *str, int16_t *len);
 static bool telnet_send_with_retries (int16_t sd, const void *pBuf, int16_t len);
-static void telnet_reset (void);
 static void telnet_reset_buffer (void);
 
 /******************************************************************************
@@ -293,6 +292,13 @@ void telnet_disable (void) {
     telnet_data.state = E_TELNET_STE_DISABLED;
 }
 
+void telnet_reset (void) {
+    // close the connection and start all over again
+    servers_close_socket(&telnet_data.n_sd);
+    servers_close_socket(&telnet_data.sd);
+    telnet_data.state = E_TELNET_STE_START;
+}
+
 bool telnet_is_enabled (void) {
     return telnet_data.enabled;
 }
@@ -499,13 +505,6 @@ static bool telnet_send_with_retries (int16_t sd, const void *pBuf, int16_t len)
     return false;
 }
 
-static void telnet_reset (void) {
-    // close the connection and start all over again
-    servers_close_socket(&telnet_data.n_sd);
-    servers_close_socket(&telnet_data.sd);
-    telnet_data.state = E_TELNET_STE_START;
-}
-
 static void telnet_reset_buffer (void) {
     // erase any characters present in the current line
     memset (telnet_data.rxBuffer, '\b', TELNET_RX_BUFFER_SIZE / 2);

cc3200/telnet/telnet.h

@@ -38,6 +38,7 @@ extern bool telnet_rx_any (void);
 extern int  telnet_rx_char (void);
 extern void telnet_enable (void);
 extern void telnet_disable (void);
+extern void telnet_reset (void);
 extern bool telnet_is_enabled (void);
 extern bool telnet_is_active (void);