Provided by: linux-doc-2.6.15_2.6.15-23.39_all bug

NAME

       struct sk_buff - socket buffer

SYNOPSIS

       struct sk_buff {
         struct sk_buff * next;
         struct sk_buff * prev;
         struct sock * sk;
         struct skb_timeval tstamp;
         struct net_device * dev;
         struct net_device * input_dev;
         union h;
         union nh;
         union mac;
         struct dst_entry * dst;
         struct sec_path * sp;
         char cb[40];
         unsigned int len;
         unsigned int data_len;
         unsigned int mac_len;
         unsigned int csum;
         __u32 priority;
         __u8 local_df:1;
         __u8 cloned:1;
         __u8 ip_summed:2;
         __u8 nohdr:1;
         __u8 nfctinfo:3;
         __u8 pkt_type:3;
         __u8 fclone:2;
         __u8 ipvs_property:1;
         __be16 protocol;
         void (* destructor) (struct sk_buff *skb);
       #ifdef CONFIG_NETFILTER
         __u32 nfmark;
         struct nf_conntrack * nfct;
       #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
         struct sk_buff * nfct_reasm;
       #endif
       #ifdef CONFIG_BRIDGE_NETFILTER
         struct nf_bridge_info * nf_bridge;
       #endif
       #endif
       #ifdef CONFIG_NET_SCHED
         __u16 tc_index;
       #ifdef CONFIG_NET_CLS_ACT
         __u16 tc_verd;
       #endif
       #endif
         unsigned int truesize;
         atomic_t users;
         unsigned char * head;
         unsigned char * data;
         unsigned char * tail;
         unsigned char * end;
       };

MEMBERS

       next   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

       input_dev
              Device we arrived on

       h      Transport layer header

       nh     Network layer header

       mac    Link layer header

       dst    destination entry

       sp     the security path, used for xfrm

       cb[40] 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

       csum   Checksum

       priority
              Packet queueing priority

       local_df
              allow local fragmentation

       cloned Head may be cloned (check refcnt to be sure)

       ip_summed
              Driver fed us an IP checksum

       nohdr  Payload reference only, must not modify header

       nfctinfo
              Relationship of this skb to the connection

       pkt_type
              Packet class

       fclone skbuff clone status

       ipvs_property
              skbuff is owned by ipvs

       protocol
              Packet protocol from driver

       destructor
              Destruct function

       nfmark Can be used for communication between hooks

       nfct   Associated connection, if any

       nfct_reasm
              netfilter conntrack re-assembly pointer

       nf_bridge
              Saved data about a bridged frame - see br_netfilter.c

       tc_index
              Traffic control index

       tc_verd
              traffic control verdict

       truesize
              Buffer size

       users  User count - see {datagram,tcp}.c

       head   Head of buffer

       data   Data head pointer

       tail   Tail pointer

       end    End pointer