STRUCT SK_BUFF - Online Linux Manual PageSection : 9
Updated : June 2018
Source : Kernel Hackers Manual 2.6.
Note : Linux Networking
NAMEstruct_sk_buff − socket buffer
SYNOPSISstruct sk_buff {
struct sk_buff * next;
struct sk_buff * prev;
struct sock * sk;
ktime_t tstamp;
struct net_device * dev;
unsigned long _skb_dst;
#ifdef CONFIG_XFRM
struct sec_path * sp;
#endif
char cb[48];
unsigned int len;
unsigned int data_len;
__u16 mac_len;
__u16 hdr_len;
union {unnamed_union};
__u16 vlan_tci;
#ifndef __GENKSYMS__
#endif
sk_buff_data_t transport_header;
sk_buff_data_t network_header;
sk_buff_data_t mac_header;
sk_buff_data_t tail;
sk_buff_data_t end;
unsigned char * head;
unsigned char * data;
unsigned int truesize;
atomic_t users;
};
MEMBERSnext Next buffer in list prev Previous buffer in list sk Socket we are owned by tstamp Time we arrived dev Device we arrived on/are leaving by _skb_dst destination entry sp the security path, used for xfrm cb[48] Control buffer. Free for use by every layer. Put private vars here len Length of actual data data_len Data length mac_len Length of link layer header hdr_len writable header length of cloned skb {unnamed_union} anonymous vlan_tci vlan tag control information transport_header Transport layer header network_header Network layer header mac_header Link layer header tail Tail pointer end End pointer head Head of buffer data Data head pointer truesize Buffer size users User count − see {datagram,tcp}.c
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