haddr : 用于存放从接收的数据包中提取的硬件地址; 1inteth_header_parse(structsk_buff *skb, u8 *haddr)2{3structethhdr *eth =eth_hdr(skb);4memcpy (haddr, eth->h_source, ETH_ALEN);//可知haddr中存放的是源MAC地址;5returnETH_ALEN;6} 7、在struct ethhdr中MAC地址为6个字节,并不是我们常见的...
u_int8_t tcpi_retransmits; u_int8_t tcpi_probes; u_int8_t tcpi_backoff; u_int8_t tcpi_options; u_int8_t tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4; u_int32_t tcpi_rto; u_int32_t tcpi_ato; u_int32_t tcpi_snd_mss; u_int32_t tcpi_rcv_mss; u_int32_t tc...
8. const struct tcphdr *th = tcp_hdr(skb); 9. int length = (th->doff * 4) - sizeof(struct tcphdr); /* 选项的总长度 */ 10. ptr = (const unsigned char *) (th + 1); /* 选项的起始地址 */ 11. opt_rx->saw_tstamp = 0; /* Saw TIMESTAMP on last packet */ 12. whil...
u_int16_t id; u_int16_t frag_off; u_int8_t ttl; u_int8_t protocol; u_int16_t check; u_int32_t saddr; u_int32_t daddr; }; ***TCP的结构*** struct tcphdr { u_int16_t source; u_int16_t dest; u_int32_t seq; u_int32_t ack_seq; # if __BYTE_ORDER == __L...
struct tcphdr { u_int16_t source; u_int16_t dest; u_int32_t seq; u_int32_t ack_seq; # if __BYTE_ORDER == __LITTLE_ENDIAN u_int16_t res1:4; u_int16_t doff:4; u_int16_t fin:1; u_int16_t syn:1; u_int16_t rst:1; ...
static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) { /* 这里就是上文提到的vlan_tci的填充,这些信息都归属于子设备本身 */ if (veth->h_vlan_proto != vlan->vlan_proto || vlan->flags & VLAN_FLAG_REORDER_HDR) { ...
hdr_len;//writable header length of cloned skbunsignedinttruesize;//socket buffer(套接字缓存区的大小)atomic_t users;//对当前的struct sk_buff结构体的引用次数;__u32 priority;//这个struct sk_buff结构体的优先级sk_buff_data_t transport_header;//传输层头部的偏移量sk_buff_data_t network_...
我是Python的新手。我的职业是C程序员。我有一个文件,它的头有一些特定的数据,我需要提取它。例如,字节0-5有魔术,字节6-8有偏移量等。在C中(一个例子): int32_t payload_offset, char *magic, } file_hdr; file_hdr 浏览0提问于2010-01-18得票数6 ...
u_int32_t daddr; }; ***TCP的结构*** structtcphdr { u_int16_t source; u_int16_t dest; u_int32_t seq; u_int32_t ack_seq; # if __BYTE_ORDER == __LITTLE_ENDIAN u_int16_t res1:4; u_int16_t doff:4; u_int16_t fin:1; ...
struct sk_buff *nfct_reasm; #endif #ifdef CONFIG_BRIDGE_NETFILTER struct nf_bridge_info *nf_bridge; #endif __u32 nfmark; #endif /* CONFIG_NETFILTER */ 这些变量被netfilter使用(防火墙代码),内核编译选项是“Device Drivers->Networking support-> Networking options-> Network packet filtering”和两...