1__be16 eth_type_trans(structsk_buff *skb,structnet_device *dev)2{3structethhdr *eth;45skb->dev =dev;6eth =eth_hdr(skb);78if(netdev_uses_dsa_tags(dev))9returnhtons(ETH_P_DSA);1011if(netdev_uses_trailer_tags(dev))12returnhtons(ETH_P_TRAILER);1314if( ntohs(eth->h_proto) >=...
If you're not sure which one to use, use struct ip; code which uses this structure is more likely to be portable to non-Linux systems. struct icmp and struct icmphdr are a messier situation: <netinet/icmp.h> defines both struct icmp and struct icmphdr. <linux/icmp.h> also defines ...
inteth_header_parse(structsk_buff*skb,u8*haddr){structethhdr*eth=eth_hdr(skb);memcpy(haddr,eth->h_source,ETH_ALEN);//可知haddr中存放的是源MAC地址;returnETH_ALEN;} 1. 2. 3. 4. 5. 6. 4.在struct ethhdr中MAC地址为6个字节,并不是我们常见的MAC字符串地址,那么如果将6字节的MAC地址转化为...
总长度字段(16)位指的是整个IP数据包的长度,以字节位单位。利用首部长度字段和总长度字段,就可以知道IP数据报中数据内容的起始位置和长度。由于该字段长1bit,所以IP数据包最长可长达65535字节。 总长度字段是IP首部中必要的内容,因为一些数据链路(如以太网)需要填充一些数据以达到最小长度。尽管以太网的最小帧长为...
ip协议 struct iphdr { unsigned char hdrlen: 4, //一字节,手动大小端转换 version: 4; unsigned char tos; unsigned short totlen; unsigned short id; unsigned short flag_offset; unsigned char ttl; unsigned char type; unsigned short check; ...
如果你知道 VLAN,那么你听说过 MACVlan 和 IPVlan 么?随着容器技术的不断兴起,IPVlan 和 MACVlan 作为 Linux 虚拟网络设备,慢慢走上前台,在 2017 年 Docker Engine 的 1.13.1 的版本[2]中,就开始引入了 IPVlan 和 MACVlan 作为容器的网络解决方案。
structipv6hdr*ipv6h; structarphdr*arph; unsigned char *raw; } nh;@nh: Network layer header网络层头标(ip,ipv6,arp,ipx,raw) union { structethhdr*ethernet; unsigned char *raw; }mac;@mac: Link layer header链路层头标 structdst_entry*dst;@dst: FIXME: Describe this field目的地 structsec...
nth->check = ~tcp_v4_check(tcp_hdr_size, niph->saddr, niph->daddr, 0); nskb->ip_summed = CHECKSUM_PARTIAL; nskb->csum_start = (unsigned char *)nth - nskb->head; nskb->csum_offset = offsetof(struct tcphdr, check); skb_dst_set_noref(nskb, skb_dst(skb)); nskb->protoco...
问我收到一个错误："struct.error: unpack需要长度为14的字符串参数“EN2021-06-30：给定长度为m的...
if hdr.Level == unix.IPPROTO_IPV6 { @@ -212,22 +213,17 @@ func (c *oobConn) ReadPacket() (receivedPacket, error) { // unsigned int ipi6_ifindex; /* send/recv interface index */ // }; if len(body) == 20 { ip := make([]byte, 16) copy(ip, body[:16]) destIP = ...