net: ignore transient accept errors

src/libthecore/socket.cpp

@@ -206,6 +206,28 @@ socket_t socket_accept(socket_t s, struct sockaddr_in *peer)
 
     if ((desc = accept(s, (struct sockaddr *) peer, &i)) == -1)
     {
+#ifdef EINTR
+	if (errno == EINTR)
+	    return INVALID_SOCKET;
+#endif
+
+#ifdef EAGAIN
+	if (errno == EAGAIN)
+	    return INVALID_SOCKET;
+#endif
+
+#ifdef EWOULDBLOCK
+	if (errno == EWOULDBLOCK)
+	    return INVALID_SOCKET;
+#endif
+
+#ifdef OS_WINDOWS
+	int wsa_error = WSAGetLastError();
+	if (wsa_error == WSAEWOULDBLOCK || wsa_error == WSAEINTR) {
+		return INVALID_SOCKET;
+	}
+#endif
+
 	sys_err("accept: %s (fd %d)", strerror(errno), s);
 	return -1;
     }