1inteth_header(structsk_buff *skb,structnet_device *dev, u16 type,void*daddr,void*saddr,intlen)2{3//将skb->data = skb->data + ETH_ALEN;4structethhdr *eth = (structethhdr*)skb_push(skb, ETH_ALEN);56if(type !=ETH_P_802_3)7eth->proto = htons(type);//htons()将本地类型转换...
// 填充udphdr字段,略 skb_reset_transport_header(skb); /* 构造IP头 */ p = skb_push(skb, sizeof(struct iphdr)); iphdr = (struct iphdr*)p; // 填充iphdr字段,略 skb_reset_network_header(skb); /* 构造以太头 */ p = skb_push(skb, sizeof(struct ethhdr)); ethhdr = (struct ethhdr...
struct net_device{char name[IFNAMSIZ];//网卡设备名称unsigned long mem_end;//该设备的内存结束地址unsigned long mem_start;//该设备的内存起始地址unsigned long base_addr;//该设备的内存I/O基地址unsigned int irq;//该设备的中断号unsigned char if_port;//多端口设备使用的端口类型unsigned char dma;/...
static void test_eth_rcv_packet(struct sk_buff *skb, struct net_device *dev) { unsigned char *type; struct iphdr *ip_hdr;//ip头结构 __be32 *saddr, *daddr, addr; unsigned char tmp_dev_addr[ETH_ALEN]; struct ethhdr *eth_hdr;//以太网头结构 struct sk_buff *rx_skb; /*1)对调et...
int eth_header(struct sk_buff *skb, struct net_device *dev, unsigned short type, const void *daddr, const void *saddr, unsigned int len) { // 为以太网头准备空间,data指针指向以太网头部 struct ethhdr *eth = skb_push(skb, ETH_HLEN); ...
unsigned short eth_type_trans(struct sk_buff *skb, struct net_device *dev) { struct ethhdr *eth; unsigned char *rawp; skb->mac.raw=skb->data; skb_pull(skb,ETH_HLEN); //取出以太网头 eth = eth_hdr(skb); skb->input_dev = dev; ...
(struct ethhdr*)(skb_mac_header(skb));ip_header=(struct iphdr*)(skb_network_header(skb));hdr_dump(eth_header);printk("src IP:'"NIPQUAD_FMT"', dst IP:'"NIPQUAD_FMT"' \n",NIPQUAD(ip_header->saddr),NIPQUAD(ip_header->daddr));returnNF_ACCEPT;}staticint __initinit_nf_test(void)...
struct ethhdr eth; memset(ð, 0, sizeof(eth)); // 设置目的MAC地址和源MAC地址 memcpy(eth.h_dest, dest_mac, ETH_ALEN); memcpy(eth.h_source, src_mac, ETH_ALEN); eth.h_proto = htons(ETH_P_IP); // IPv4协议 构建IP报头: IP报头包含IP版本、头部长度、服务类型、总长度、标识...
int filter(struct xdp_md *ctx) { int ipsize = 0; void *data = (void *)(long)ctx->data; void *data_end = (void *)(long)ctx->data_end; struct ethhdr *eth = data; struct iphdr *ip; ipsize = sizeof(*eth); ip = data + ipsize; ...
struct ethhdr *eth = eth_hdr(skb); struct ipvl_addr *addr; void *lyr3h; int addr_type; /* 这里就是上面各个场景中经常提到的,判断报文的dmac==smac,以判断是否发往内部接口(宿主接口+其上创建的所有vlan接口)。 */ if (ether_addr_equal(eth->h_dest, eth->h_source)) { ...