void*buf,size_t len,int flags);ssize_trecvfrom(int sockfd,void*buf,size_t len,int flags,struct sockaddr*src_addr,socklen_t*addrlen);ssize_trecvmsg(int sockfd,struct msghdr*msg,int flags);DESCRIPTIONTherecvfrom()andrecvmsg()calls are used to...
MsgType Message type. CompType Component type. CompPid PID of a component. ResendNum Number of message resending times within 1 minute. Possible Causes Cause 1: The message queue is congested. As a result, messages are lost or cannot reach the peer component. Cause 2: The peer compon...
通过指定一个Exchange和RouteKey, 把消息送达到某一个队列中去,然后我们的消费者监听队列,进行消费处理操...
msg--->msg_sys--->msg_sys->msg_controllen--->ctl_len msg--->msg_sys->msg_control--->ctl_buf 利用流程: //限制: BUFF_SIZE > 44charbuff[BUFF_SIZE];structmsghdrmsg={0};structsockaddr_inaddr={0};intsockfd=socket(AF_INET,SOCK_DGRAM,0);addr.sin_addr.s_addr=htonl(INADDR_LOOPBACK...
MsgType Message type. CompType Component type. CompPid PID of a component. ResendNum Number of message resending times within 1 minute. Possible Causes Cause 1: The message queue is congested. As a result, messages are lost or cannot reach the peer component. Cause 2: The peer compon...
flags = msg->msg_flags; timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT); //只有在ESTABLISHED和CLOSE_WAIT状态下对方才能够接收数据,尝试等待连接的建立 if ((1 << sk->sk_state) & ~(TCPF_ESTABLISHED | TCPF_CLOSE_WAIT)) if ((err = sk_stream_wait_connect(sk, &timeo)) != 0) ...
tcp_sendmsg()的主要工作是传输用户层的数据,将数据放入skb中。然后调用tcp_push()发送,tcp_push函数调用tcp_write_xmit() 函数,依次调用发送函数tcp_transmit_skb将skb封装tcp头之后,回调ip_queue_xmit。 网络层 ip_queue_xmit(skb)主要有路由查找校验、封装ip头和ip选项,最后通过ip_local_out发送数据包。
Msg [in] Specifies the message to be sent. wParam [in] Specifies additional message-specific information. lParam [in] Specifies additional message-specific information. Return Value Nonzero indicates success. Zero indicates failure. To get extended error information, callGetLastError. ...
// Write a msg to a mailslot, return nr Uses mq as reference pointer, so that you can reach the handle from anywhere // should return number of bytes read */ } 打开工作正常,但我无法写入消息队列。 mq_send返回-1作为返回值,错误消息为: ...
in order to ensure an orderly // global msg.setStoreTimestamp(beginLockTimestamp); if (null == mapedFile || mapedFile.isFull()) { mapedFile = this.mapedFileQueue.getLastMapedFile(); } if (null == mapedFile) { log.error("create maped file1 error, topic: " + msg.getTopic() +...