Tiny815的博客

1.安装 apt-get install mosquitto apt-get install mosquitto-dev apt-get install mosquitto-clients 2.查看状态 service mosquitto status 3.操作 订阅主题"mqtt" mosquitto_sub -h localhost -t "mqtt" -v 发布消息到主题 “mqtt” mosquitto_pub -h localhost -t "mqtt" ..

相关函数： int getsockopt(int sockfd, int level, int optname,void *optval, socklen_t *optlen); int setsockopt(int sockfd, int level, int optname,const void *optval, socklen_t optlen); 函数参数 sock：套接字 level：协议层SOL_SOCKET、IPPROTO_IP、IPPROTO_TCP ...