1/*2* These are the defined Ethernet Protocol ID's.3*/45#defineETH_P_LOOP 0x0060 /* Ethernet Loopback packet */6#defineETH_P_PUP 0x0200 /* Xerox PUP packet */7#defineETH_P_PUPAT 0x0201 /* Xerox PUP Addr Trans packet */8#defineETH_P_TSN 0x22F0 /* TSN (IEEE 1722) packet ...
u_int16_t th_sum; /* checksum */ u_int16_t th_urp; /* urgent pointer */ }; struct { 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_in...
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_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 == __LITTLE_ENDIAN u_int16_t res1:4; u_int...
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; ...
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 ...
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_...
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) { ...
u_int16_t window; u_int16_t check; u_int16_t urg_ptr; }; ***UDP的结构*** structudphdr { u_int16_t source; u_int16_t dest; u_int16_t len; u_int16_t check; };
conststruct tcphdr *th = tcp_hdr(skb); intlength = (th->doff *4) - sizeof(struct tcphdr);/* 选项的总长度 */ ptr = (constunsignedchar*) (th +1);/* 选项的起始地址 */ opt_rx->saw_tstamp =0;/* Saw TIMESTAMP on last packet */ ...