问相当于ping的网络设备模块

EN

 icmp.type = 8;
 icmp.code = 0;
 icmp.un.echo.sequence = i;
 ip4.protocol = 1; //for icmp protocol
 ip4.frag_off = 0;
 ip4.daddr = in_aton(procfs_buffer);
 ip4.saddr = in_aton(ifr->ifr_addr.sa_data);

 len = sizeof(data);

 skb = dev_alloc_skb(1500);
 skb->dev = __dev_get_by_name(&init_net,"wlan0");
 skb_reserve(skb,NET_IP_ALIGN); // header of 2 bytes; increments tail and 
                                // data pointer
 skb->data = skb_put(skb,sizeof(len)); // increments all pointer or adds data
 memcpy(data,skb->data,len);

 skb->transport_header =skb_push(skb,sizeof(icmp));
 memset(skb->transport_header,0,sizeof(struct icmphdr));
 memcpy(skb->transport_header,&icmp,sizeof(struct icmphdr));

 skb->network_header=skb_push(skb,sizeof(ip4));
 memset(skb->network_header,0,sizeof(struct iphdr));
 memcpy(skb->network_header,&ip4,sizeof(struct iphdr));

 // printk("i::%d\n",i);
 // skb->mac_header = skb_push(skb,6*sizeof(0xFF));
 // memset(skb->mac_header,0xFF,6*sizeof(0xFF));
 dev_queue_xmit(skb);
 kfree(skb);