int flag = fcntl(fd, F_GETFL, 0); if (fcntl(fd, F_SETFL, flag | O_NONBLOCK) == -1) { cout << "fcntl failed" << endl; goto END; } // 2. 检查连接是否立即建立 ret = connect(fd, (sockaddr*)&srvAddr, sizeof(struct sockaddr_in)); if (ret == 0) { cout << "connect ...
在socket_send()内部,当写缓冲已满(send()返回-1,且errno为EAGAIN),那么会等待后再重试.这种方式并不很完美,在理论上可能会长时间的阻塞在socket_send()内部,但暂没有更好的办法. ssize_t socket_send(int sockfd, const char* buffer, size_t buflen) { ssize_t tmp; size_t total = buflen; const...
select(client_fd + 1, &readfds, NULL, NULL, NULL); if (FD_ISSET(client_fd, &readfds)) { // 从socket中接收数据 memset(buffer, 0, sizeof(buffer)); int bytes_recv = recv(client_fd, buffer, sizeof(buffer), 0); // 打印接收到的数据 printf("Received data: %s\n", buffer); } ...
<<std::endl; client_len=sizeof(client_addr); //从客户端接收消息---阻塞,卡着了 ssize_t message_len=recvfrom(server_fd,buffer,sizeof(buffer),0, (struct sockaddr *)&client_addr,&client_len); //按道理,上面的阻塞放开了,那就是有消息了,那消息为0就不正常 if(message_len<0) { std::...
代码运行次数:0 运行 AI代码解释 char Response[]="kudliugf";char buffer[128];while(1){int nBytes=recv(connfd,buffer,sizeof(buffer),0);if(nBytes==-1){error(1,errno,"error read message");}elseif(nBytes==0){error(1,0,"client closed \n");}buffer[nBytes]='\0';if(strcmp(buffer,"...
//超时链接没有建立close(_socket_fd) } //将检测到_socket_fd读事件或写时间,并不能说明connect成功 if(FD_ISSET(_socket_fd,&set)) { int error = 0; socklen_t len = sizeof(error); if(getsockopt(_socket_fd, SOL_SOCKET, SO_ERROR, &error, &len) < 0) ...
continue; } return -1; } if((size_t)tmp == total) return buflen; total -= tmp; p += tmp; } return tmp; } === 测试获得: 在阻塞和非阻塞模式下,当recv函数的接受buffer大小设置为0时,recv函数返回0,errno为0
sizeof(buffer)); if (bytesRead < 0) { std::cerr << "Failed to read from socket" << std::endl; close(clientSocket); close(serverSocket); return 1; } std::cout << "Received data from client: " << buffer << std::endl; close(clientSocket); close(serverSocket); return 0; } ...
[BUFFER_SIZE]="hello";charrecvbuf[BUFFER_SIZE];while(1){send(fd,sendbuf,strlen(sendbuf),0);// 发送printf("client->server:%s\n",sendbuf);memset(&recvbuf,0,sizeof(recvbuf));recv(fd,recvbuf,sizeof(recvbuf),0);//接收printf("server->client:%s\n\n",recvbuf);sleep(3);}return0;...
#include <iostream> #include <cstring> #include <sys/types.h> #include <sys/socket.h> #define BUFFER_SIZE 1024 int main() { int server_fd, new_socket; struct sockaddr_in address; int addrlen = sizeof(address); char buffer[BUFFER_SIZE] = {0}; // 创建socket if ((server_fd = so...