Diff: Socket/TCPSocketConnection.cpp

Revision:

0:b2805b6888dc

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Socket/TCPSocketConnection.cpp	Mon Jun 20 01:40:20 2016 +0000
@@ -0,0 +1,133 @@
+/* Copyright (C) 2012 mbed.org, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "TCPSocketConnection.h"
+#include <cstring>
+
+using std::memset;
+using std::memcpy;
+
+TCPSocketConnection::TCPSocketConnection() :
+        _is_connected(false) {
+}
+
+int TCPSocketConnection::connect(const char* host, const int port) {
+    if (init_socket(SOCK_STREAM) < 0)
+        return -1;
+    
+    if (set_address(host, port) != 0)
+        return -1;
+    
+    if (lwip_connect(_sock_fd, (const struct sockaddr *) &_remoteHost, sizeof(_remoteHost)) < 0) {
+        close();
+        return -1;
+    }
+    _is_connected = true;
+    
+    return 0;
+}
+
+bool TCPSocketConnection::is_connected(void) {
+    return _is_connected;
+}
+
+int TCPSocketConnection::send(char* data, int length) {
+    if ((_sock_fd < 0) || !_is_connected)
+        return -1;
+    
+    if (!_blocking) {
+        TimeInterval timeout(_timeout);
+        if (wait_writable(timeout) != 0)
+            return -1;
+    }
+    
+    int n = lwip_send(_sock_fd, data, length, 0);
+    _is_connected = (n != 0);
+    
+    return n;
+}
+
+// -1 if unsuccessful, else number of bytes written
+int TCPSocketConnection::send_all(char* data, int length) {
+    if ((_sock_fd < 0) || !_is_connected)
+        return -1;
+    
+    int writtenLen = 0;
+    TimeInterval timeout(_timeout);
+    while (writtenLen < length) {
+        if (!_blocking) {
+            // Wait for socket to be writeable
+            if (wait_writable(timeout) != 0)
+                return writtenLen;
+        }
+        
+        int ret = lwip_send(_sock_fd, data + writtenLen, length - writtenLen, 0);
+        if (ret > 0) {
+            writtenLen += ret;
+            continue;
+        } else if (ret == 0) {
+            _is_connected = false;
+            return writtenLen;
+        } else {
+            return -1; //Connnection error
+        }
+    }
+    return writtenLen;
+}
+
+int TCPSocketConnection::receive(char* data, int length) {
+    if ((_sock_fd < 0) || !_is_connected)
+        return -1;
+    
+    if (!_blocking) {
+        TimeInterval timeout(_timeout);
+        if (wait_readable(timeout) != 0)
+            return -1;
+    }
+    
+    int n = lwip_recv(_sock_fd, data, length, 0);
+    _is_connected = (n != 0);
+    
+    return n;
+}
+
+// -1 if unsuccessful, else number of bytes received
+int TCPSocketConnection::receive_all(char* data, int length) {
+    if ((_sock_fd < 0) || !_is_connected)
+        return -1;
+    
+    int readLen = 0;
+    TimeInterval timeout(_timeout);
+    while (readLen < length) {
+        if (!_blocking) {
+            //Wait for socket to be readable
+            if (wait_readable(timeout) != 0)
+                return readLen;
+        }
+        
+        int ret = lwip_recv(_sock_fd, data + readLen, length - readLen, 0);
+        if (ret > 0) {
+            readLen += ret;
+        } else if (ret == 0) {
+            _is_connected = false;
+            return readLen;
+        } else {
+            return -1; //Connnection error
+        }
+    }
+    return readLen;
+}