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// 创建套接字
int socket_fd = socket(domain, type, protocol);
// 绑定地址
bind(socket_fd, (struct sockaddr*)&address, sizeof(address));
// 监听连接（服务器）
listen(socket_fd, backlog);
// 接受连接（服务器）
int client_fd = accept(socket_fd, NULL, NULL);
// 连接服务器（客户端）
connect(socket_fd, (struct sockaddr*)&address, sizeof(address));
// 发送数据
send(socket_fd, buffer, buffer_size, 0);
// 接收数据
recv(socket_fd, buffer, buffer_size, 0);
// 关闭套接字
close(socket_fd);// 设置套接字选项
int optval = 1;
setsockopt(socket_fd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
// 设置超时
struct timeval timeout;
timeout.tv_sec = 5;
timeout.tv_usec = 0;
setsockopt(socket_fd, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(timeout));// 创建UNIX域套接字
int fd = socket(AF_UNIX, SOCK_STREAM, 0);
// 设置地址结构
struct sockaddr_un addr;
addr.sun_family = AF_UNIX;
strcpy(addr.sun_path, "/tmp/socket_file");
// 绑定地址
bind(fd, (struct sockaddr*)&addr, sizeof(addr));
// 监听和接受连接
listen(fd, 5);
int client_fd = accept(fd, NULL, NULL);# 设置套接字权限
$ chmod 660 /tmp/socket_file
$ chown user:group /tmp/socket_file// 客户端连接
int fd = socket(AF_UNIX, SOCK_STREAM, 0);
struct sockaddr_un addr;
addr.sun_family = AF_UNIX;
strcpy(addr.sun_path, "/tmp/socket_file");
connect(fd, (struct sockaddr*)&addr, sizeof(addr));