内核socket通信
#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("192.168.168.5");
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="hahahha client messsage! \n";
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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