Linux 内核态 Socket 编程--更正
2014-02-20 17:02
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Server端代码:
client端代码:
#include<linux/in.h> #include<linux/inet.h> #include<linux/socket.h> #include<net/sock.h> #include<linux/init.h> #include<linux/module.h> int myserver(void){ struct socket *sock,*client_sock; struct sockaddr_in s_addr; unsigned short portnum=0x8870; int ret=0; memset(&s_addr,0,sizeof(s_addr)); s_addr.sin_family=AF_INET; s_addr.sin_port=htons(portnum); s_addr.sin_addr.s_addr=htonl(INADDR_ANY); sock=(struct socket *)kmalloc(sizeof(struct socket),GFP_KERNEL); client_sock=(struct socket *)kmalloc(sizeof(struct socket),GFP_KERNEL); /*create a socket*/ ret=sock_create_kern(AF_INET, SOCK_STREAM,0,&sock); if(ret){ printk("server:socket_create error!\n"); } printk("server:socket_create ok!\n"); /*set the socket can be reused*/ int val=1; ret= kernel_setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val)); if(ret){ printk("kernel_setsockopt error!!!!!!!!!!!\n"); } /*bind the socket*/ ret=sock->ops->bind(sock,(struct sockaddr *)&s_addr,sizeof(struct sockaddr_in)); if(ret<0){ printk("server: bind error\n"); return ret; } printk("server:bind ok!\n"); /*listen*/ ret=sock->ops->listen(sock,10); if(ret<0){ printk("server: listen error\n"); return ret; } printk("server:listen ok!\n"); //ret=sock->ops->accept(sock,client_sock,10); ret = kernel_accept(sock,&client_sock,10); if(ret<0){ printk("server:accept error!\n"); return ret; } printk("server: accept ok, Connection Established\n"); /*kmalloc a receive buffer*/ char *recvbuf=NULL; recvbuf=kmalloc(1024,GFP_KERNEL); if(recvbuf==NULL){ printk("server: recvbuf kmalloc error!\n"); return -1; } memset(recvbuf, 0, sizeof(recvbuf)); /*receive message from client*/ struct kvec vec; struct msghdr msg; memset(&vec,0,sizeof(vec)); memset(&msg,0,sizeof(msg)); vec.iov_base=recvbuf; vec.iov_len=1024; ret=kernel_recvmsg(client_sock,&msg,&vec,1,1024,0); printk("receive message:\n %s\n",recvbuf); printk("receive size=%d\n",ret); sock_release(sock); sock_release(client_sock); return ret; } static int server_init(void){ printk("server init:\n"); myserver(); return 0; } static void server_exit(void){ printk("good bye\n"); } module_init(server_init); module_exit(server_exit); MODULE_LICENSE("GPL");
client端代码:
#include<linux/in.h> #include<linux/inet.h> #include<linux/socket.h> #include<net/sock.h> #include<linux/init.h> #include<linux/module.h> int myclient(void){ struct socket *sock; struct sockaddr_in s_addr; unsigned short portnum=0x8870; int ret=0; memset(&s_addr,0,sizeof(s_addr)); s_addr.sin_family=AF_INET; s_addr.sin_port=htons(portnum); //s_addr.sin_addr.s_addr=inet_addr("127.0.0.1"); /*I am not sure whether the ined_addr is right, may should be htonl*/ s_addr.sin_addr.s_addr=in_aton("127.0.0.1"); sock=(struct socket *)kmalloc(sizeof(struct socket),GFP_KERNEL); /*create a socket*/ ret=sock_create_kern(AF_INET, SOCK_STREAM,0,&sock); if(ret<0){ printk("client:socket create error!\n"); return ret; } printk("client: socket create ok!\n"); /*conncet server*/ ret=sock->ops->connect(sock,(struct sockaddr *)&s_addr, sizeof(s_addr),0); if(ret!=0){ printk("client:connect error!\n"); return ret; } printk("client:connect ok!\n"); /*kmalloc sendbuf*/ char *sendbuf="client messsage!"; int len=sizeof("client message!"); /*send message */ struct kvec vec; struct msghdr msg; vec.iov_base=sendbuf; vec.iov_len=len; memset(&msg,0,sizeof(msg)); ret= kernel_sendmsg(sock,&msg,&vec,1,len); if(ret<0){ printk("client: kernel_sendmsg error!\n"); return ret; }else if(ret!=len){ printk("client: ret!=len\n"); } printk("client send size=%d\n",ret); printk("client:send ok!\n"); sock_release(sock); return ret; } static int client_init(void){ printk("client:init\n"); myclient(); return 0; } static void client_exit(void){ printk("client exit!\n"); } module_init(client_init); module_exit(client_exit); MODULE_LICENSE("GPL");
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