* class, and it will be called whenever read or write
* events are received.
* @param et either one of EVENT_READ for read events,
- * and EVENT_WRITE for write events.
+ * EVENT_WRITE for write events and EVENT_ERROR for
+ * error events.
+ * @param errornum The error code which goes with an EVENT_ERROR.
*/
virtual void HandleEvent(EventType et, int errornum = 0) = 0;
/** Abstraction for BSD sockets accept(2).
* This function should emulate its namesake system call exactly.
* @param fd This version of the call takes an EventHandler instead of a bare file descriptor.
+ * @param addr The client IP address and port
+ * @param addrlen The size of the sockaddr parameter.
* @return This method should return exactly the same values as the system call it emulates.
*/
int Accept(EventHandler* fd, sockaddr *addr, socklen_t *addrlen);
/** Abstraction for BSD sockets send(2).
* This function should emulate its namesake system call exactly.
* @param fd This version of the call takes an EventHandler instead of a bare file descriptor.
+ * @param buf The buffer in which the data that is sent is stored.
+ * @param len The size of the buffer.
+ * @param flags A flag value that controls the sending of the data.
* @return This method should return exactly the same values as the system call it emulates.
*/
int Send(EventHandler* fd, const void *buf, size_t len, int flags);
/** Abstraction for BSD sockets recv(2).
* This function should emulate its namesake system call exactly.
* @param fd This version of the call takes an EventHandler instead of a bare file descriptor.
+ * @param buf The buffer in which the data that is read is stored.
+ * @param len The size of the buffer.
+ * @param flags A flag value that controls the reception of the data.
* @return This method should return exactly the same values as the system call it emulates.
*/
int Recv(EventHandler* fd, void *buf, size_t len, int flags);
/** Abstraction for BSD sockets recvfrom(2).
* This function should emulate its namesake system call exactly.
* @param fd This version of the call takes an EventHandler instead of a bare file descriptor.
+ * @param buf The buffer in which the data that is read is stored.
+ * @param len The size of the buffer.
+ * @param flags A flag value that controls the reception of the data.
+ * @param from The remote IP address and port.
+ * @param fromlen The size of the from parameter.
* @return This method should return exactly the same values as the system call it emulates.
*/
int RecvFrom(EventHandler* fd, void *buf, size_t len, int flags, sockaddr *from, socklen_t *fromlen);
/** Abstraction for BSD sockets sendto(2).
* This function should emulate its namesake system call exactly.
* @param fd This version of the call takes an EventHandler instead of a bare file descriptor.
+ * @param buf The buffer in which the data that is sent is stored.
+ * @param len The size of the buffer.
+ * @param flags A flag value that controls the sending of the data.
+ * @param to The remote IP address and port.
+ * @param tolen The size of the to parameter.
* @return This method should return exactly the same values as the system call it emulates.
*/
int SendTo(EventHandler* fd, const void *buf, size_t len, int flags, const sockaddr *to, socklen_t tolen);
/** Abstraction for BSD sockets connect(2).
* This function should emulate its namesake system call exactly.
* @param fd This version of the call takes an EventHandler instead of a bare file descriptor.
+ * @param serv_addr The server IP address and port.
+ * @param addrlen The size of the sockaddr parameter.
* @return This method should return exactly the same values as the system call it emulates.
*/
int Connect(EventHandler* fd, const sockaddr *serv_addr, socklen_t addrlen);
/** Abstraction for BSD sockets shutdown(2).
* This function should emulate its namesake system call exactly.
* @param fd This version of the call takes an EventHandler instead of a bare file descriptor.
+ * @param how What part of the socket to shut down
* @return This method should return exactly the same values as the system call it emulates.
*/
int Shutdown(EventHandler* fd, int how);
/** Get data transfer statistics, kilobits per second in and out and total.
*/
void GetStats(float &kbitpersec_in, float &kbitpersec_out, float &kbitpersec_total);
+
+ /** Should we ignore the error in errno?
+ * Checks EAGAIN and WSAEWOULDBLOCK
+ */
+ static bool IgnoreError();
+
+ /** Return the last socket related error. strrerror(errno) on *nix
+ */
+ static std::string LastError();
+
+ /** Returns the error for the given error num, strerror(errnum) on *nix
+ */
+ static std::string GetError(int errnum);
};
+inline bool SocketEngine::IgnoreError()
+{
+ if ((errno == EAGAIN) || (errno == EWOULDBLOCK))
+ return true;
+
+#ifdef _WIN32
+ if (WSAGetLastError() == WSAEWOULDBLOCK)
+ return true;
+#endif
+
+ return false;
+}
+
SocketEngine* CreateSocketEngine();
#endif