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()
This is called blocking; you can prevent blocking by setting the optional blocking parameter to FALSE, in which case msg_send() will immediately return FALSE if the message is too big for the queue, and set the optional errorcode to MSG_EAGAIN, indicating that you should try to send your...
tcp_push(sk, flags & ~MSG_MORE, mss_now, TCP_NAGLE_PUSH); if ((err = sk_stream_wait_memory(sk, &timeo)) != 0) //等待内存分配 goto do_error; mss_now = tcp_send_mss(sk, &size_goal, flags); } } out: if (copied) tcp_push(sk, flags, mss_now, tp->nonagle); TCP_CHEC...
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...
while (msg_data_left(msg)) { // 当消息中还有数据未发送时 ssize_t copy = 0; // 初始化拷贝长度为0 skb = tcp_write_queue_tail(sk); // 获取TCP写队列的尾部 if (skb) copy = size_goal - skb->len; // 计算可以复制的数据长度 if (copy <= 0 || !tcp_skb_can_collapse_to(skb))...
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...
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...
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。
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() +...
msg_send—Send a message to a message queue 说明 boolmsg_send(resource$queue,int$msgtype,mixed$message[,bool$serialize= true[,bool$blocking= true[,int&$errorcode]]] ) msg_send()sends amessageof typemsgtype(which MUST be greater than 0) to the message queue specified byqueue. ...