最简单的socket端口的建立

#include
#include  //定义了sockaddr_in结构体
#include
#include
int main()
{
        int listen_fd;
        int optvalue;
        struct sockaddr_in server;
        server.sin_family=AF_INET;
        server.sin_port=htons(8080);
        server.sin_addr.s_addr=htonl(INADDR_ANY);
        if((listen_fd=socket(AF_INET,SOCK_STREAM,0))<0)
        {
                printf("call socket error\n");
                exit(1);
        }
        setsockopt(listen_fd,SOL_SOCKET,SO_REUSEADDR,&optvalue,sizeof(int));
        if(bind(listen_fd,(struct sockaddr*)&server,sizeof(server))<0)
        {
                printf("bind error\n");
                exit(1);
        }
        if(listen(listen_fd,5)<0)
        {
                printf("listen error\n");
                exit(1);
        }
        accept(listen_fd,NULL,NULL);
}