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。 数据链路层 数据链路层在不可靠的物理介质上提供可靠的传输。该层的...
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...
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 Indicates the type of the message. CompType Component type. CompPid PID of a component. ResendNum Number of message resending times within 1 minute. Possible Causes Cause 1: The message queue was congested, messages were lost, or messages could not reach the component on the op...
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) ...
msg_send — Send a message to a message queue Description 代码语言:javascript 复制 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...
选择完 Queue 后,就要进行实际的发送了 mq = mqSelected; brokersSent[times] = mq.getBrokerName(); try { beginTimestampPrev = System.currentTimeMillis(); if (times > 0) { // 在重新发送期间使用命名空间重置主题 msg.setTopic(this.defaultMQProducer.withNamespace(msg.getTopic())); } // 消...
(msqid,mtype,msgp->mtext,msgsz,msgflg);}// /ipc/msg.cstaticlongdo_msgsnd(intmsqid,longmtype,void__user*mtext,size_tmsgsz,intmsgflg){structmsg_queue*msq;structmsg_msg*msg;interr;structipc_namespace*ns;DEFINE_WAKE_Q(wake_q);ns=current->nsproxy->ipc_ns;if(msgsz>ns->msg_ctlmax||(...
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() +...