Fixed issue ros-industrial#48, logSocketError is now passed errno

simple_message/include/simple_message/socket/simple_socket.h

@@ -226,10 +226,29 @@ class SimpleSocket : public industrial::smpl_msg_connection::SmplMsgConnection
     this->sock_handle_ = sock_handle_;
   }
 
+  /**
+   * \deprecated This could report the wrong error number.  The method that takes
+   * errno as an argument should be used instead.
+   * \brief Logs message to error log and reports associated socket system error
+   * \param msg custom message prefixed to system error
+   * \param rc return code from socket
+   */
+  __attribute__((deprecated(
+                   "Please use: logSocketError(const char* msg, const int rc, const int error_no)")))
   void logSocketError(const char* msg, int rc)
   {
-    int errno_ = errno;
-    LOG_ERROR("%s, rc: %d. Error: '%s' (errno: %d)", msg, rc, strerror(errno_), errno_);
+    logSocketError(msg, rc, errno);
+  }
+
+  /**
+   * \brief Logs message to error log and reports associated socket system error
+   * \param msg custom message prefixed to system error
+   * \param rc return code from socket
+   * \param error_no errno value see (http://man7.org/linux/man-pages/man3/errno.3.html )
+   */
+  void logSocketError(const char* msg, const int rc, const int error_no)
+  {
+    LOG_ERROR("%s, rc: %d. Error: '%s' (errno: %d)", msg, rc, strerror(error_no), error_no);
   }
 
   // Send/Receive functions (inherited classes should override raw methods

simple_message/src/socket/simple_socket.cpp

@@ -65,7 +65,7 @@ namespace industrial
           else
           {
             rtn = false;
-            logSocketError("Socket sendBytes failed", rc);
+            logSocketError("Socket sendBytes failed", rc, errno);
           }
 
         }
@@ -127,7 +127,7 @@ namespace industrial
               rc = rawReceiveBytes(this->buffer_, remainBytes);
               if (this->SOCKET_FAIL == rc)
               {
-                this->logSocketError("Socket received failed", rc);
+                this->logSocketError("Socket received failed", rc, errno);
 		        remainBytes = 0;
                 rtn = false;
                 break;

simple_message/src/socket/tcp_client.cpp

@@ -117,7 +117,7 @@ bool TcpClient::makeConnect()
     }
     else
     {
-      this->logSocketError("Failed to connect to server", rc);
+      this->logSocketError("Failed to connect to server", rc, errno);
       rtn = false;
     }
   }

simple_message/src/socket/tcp_socket.cpp

@@ -126,7 +126,7 @@ bool TcpSocket::rawPoll(int timeout, bool & ready, bool & error)
       }
     }
   } else {
-    this->logSocketError("Socket select function failed", rc);
+    this->logSocketError("Socket select function failed", rc, errno);
     rtn = false;
   }
   return rtn;

simple_message/src/socket/udp_socket.cpp

@@ -152,7 +152,7 @@ bool UdpSocket::rawPoll(int timeout, bool & ready, bool & error)
       }
     }
   } else {
-    this->logSocketError("Socket select function failed", rc);
+    this->logSocketError("Socket select function failed", rc, errno);
     rtn = false;
   }
   return rtn;