小弟最近寫了一部份的程式如下,是用vc++寫的,主要用意是送一個broadcast出去...然後接收回來...只是如果我的server沒有開的話...一執行到recvfrom那邊我的程式就會整個當在那...小弟想半天想不出解決的方法...請會的高手指引一條明路吧..3q  對了...recvfrom連回傳值都不給我... < class="code"> sa.sin_family = AF_INET; sa.sin_port = htons(64513); sa.sin_addr.s_addr = INADDR_ANY; st.sin_family = AF_INET; st.sin_port = htons(64515); st.sin_addr.s_addr = INADDR_BROADCAST; int sa_len = sizeof(sa); int so_options = SO_BROADCAST; socket_sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); if(socket_sd != SOCKET_ERROR) { bind( socket_sd, (struct sockaddr *)&sa, sa_len); setsockopt(socket_sd, SOL_SOCKET, so_options, (char *)&so_options, sizeof(so_options)); sendto(socket_sd, buf,sizeof(buf), 0, (struct sockaddr *)&st, sizeof(st)); recvfrom(socket_sd, buf, 1024, 0,(struct sockaddr *)&sa, &sa_len); 發表人 - stele 於 2004/04/19 17:21:52 發表人 - stele 於 2004/04/19 17:37:58