Added NoRouteToHost error. Fixed Disconnect not being returned by Socket

include/frnetlib/Socket.h

@@ -39,6 +39,7 @@ namespace fr
             ReceiveError = 17,
             AcceptError = 18,
             SSLError = 19,
+            NoRouteToHost = 20
             //Remember to update status_to_string if more are added
         };
 

src/SSLSocket.cpp

@@ -70,7 +70,11 @@ namespace fr
         if(receive_timeout == 0)
         {
             status = mbedtls_ssl_read(ssl.get(), (unsigned char *)data, data_size);
-            if(status <= 0)
+            if(status == 0)
+            {
+                return Socket::Status::Disconnected;
+            }
+            if(status < 0)
             {
                 if(status == MBEDTLS_ERR_SSL_WANT_READ || status == MBEDTLS_ERR_SSL_WANT_WRITE)
                 {

src/Socket.cpp

@@ -156,6 +156,9 @@ namespace fr
                 return "Generic SSL Error";
 #endif
             }
+            case NoRouteToHost:
+                return "No Route To Host";
+                break;
             default:
                 return "Unknown";
         }

src/TcpSocket.cpp

@@ -52,11 +52,17 @@ namespace fr
 
     Socket::Status TcpSocket::receive_raw(void *data, size_t buffer_size, size_t &received)
     {
+        received = 0;
         ssize_t status = 0;
         do
         {
             status = ::recv(socket_descriptor, (char*)data, buffer_size, 0);
-            if(status <= 0)
+            if(status == 0)
+            {
+                return Socket::Status::Disconnected;
+            }
+
+            if(status < 0)
             {
                 if(errno == EWOULDBLOCK || errno == EAGAIN)
                 {
@@ -163,7 +169,7 @@ namespace fr
         //We're done with this now, cleanup
         freeaddrinfo(info);
         if(c == nullptr)
-            return Socket::Status::Error;
+            return Socket::Status::NoRouteToHost;
 
         //Turn back to blocking mode
         if(!set_unix_socket_blocking(socket_descriptor, false, true))