struct_sk_buff(9) [centos man page]

STRUCT 
SK_BUFF(9)						 Linux Networking						 STRUCT SK_BUFF(9)

NAME

       struct_sk_buff - socket buffer

SYNOPSIS

       struct sk_buff {
	 struct sk_buff * next;
	 struct sk_buff * prev;
	 ktime_t tstamp;
	 struct sock * sk;
	 struct net_device * dev;
	 char cb[48];
	 unsigned long _skb_refdst;
       #ifdef CONFIG_XFRM
	 struct sec_path * sp;
       #endif
	 unsigned int len;
	 unsigned int data_len;
	 __u16 mac_len;
	 __u16 hdr_len;
	 union {unnamed_union};
	 __be16 inner_protocol;
	 __u16 inner_transport_header;
	 __u16 inner_network_header;
	 __u16 inner_mac_header;
	 __u16 transport_header;
	 __u16 network_header;
	 __u16 mac_header;
	 sk_buff_data_t tail;
	 sk_buff_data_t end;
	 unsigned char * head;
	 unsigned char * data;
	 unsigned int truesize;
	 atomic_t users;
       };

MEMBERS

       next
	   Next buffer in list

       prev
	   Previous buffer in list

       tstamp
	   Time we arrived

       sk
	   Socket we are owned by

       dev
	   Device we arrived on/are leaving by

       cb[48]
	   Control buffer. Free for use by every layer. Put private vars here

       _skb_refdst
	   destination entry (with norefcount bit)

       sp
	   the security path, used for xfrm

       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

       inner_protocol
	   Protocol (encapsulation)

       inner_transport_header
	   Inner transport layer header (encapsulation)

       inner_network_header
	   Network layer header (encapsulation)

       inner_mac_header
	   Link layer header (encapsulation)

       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

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014							 STRUCT SK_BUFF(9)

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STRUCT 
TID_AMPDU_RX(9)						     Internals						    STRUCT TID_AMPDU_RX(9)

NAME

       struct_tid_ampdu_rx - TID aggregation information (Rx).

SYNOPSIS

       struct tid_ampdu_rx {
	 struct rcu_head rcu_head;
	 spinlock_t reorder_lock;
	 struct sk_buff ** reorder_buf;
	 unsigned long * reorder_time;
	 struct timer_list session_timer;
	 struct timer_list reorder_timer;
	 unsigned long last_rx;
	 u16 head_seq_num;
	 u16 stored_mpdu_num;
	 u16 ssn;
	 u16 buf_size;
	 u16 timeout;
	 u8 dialog_token;
       };

MEMBERS

       rcu_head
	   RCU head used for freeing this struct

       reorder_lock
	   serializes access to reorder buffer, see below.

       reorder_buf
	   buffer to reorder incoming aggregated MPDUs

       reorder_time
	   jiffies when skb was added

       session_timer
	   check if peer keeps Tx-ing on the TID (by timeout value)

       reorder_timer
	   releases expired frames from the reorder buffer.

       last_rx
	   jiffies of last rx activity

       head_seq_num
	   head sequence number in reordering buffer.

       stored_mpdu_num
	   number of MPDUs in reordering buffer

       ssn
	   Starting Sequence Number expected to be aggregated.

       buf_size
	   buffer size for incoming A-MPDUs

       timeout
	   reset timer value (in TUs).

       dialog_token
	   dialog token for aggregation session

DESCRIPTION

       This structure's lifetime is managed by RCU, assignments to the array holding it must hold the aggregation mutex.

       The reorder_lock is used to protect the members of this struct, except for timeout, buf_size and dialog_token, which are constant across
       the lifetime of the struct (the dialog token being used only for debugging).

AUTHOR

       Johannes Berg <johannes@sipsolutions.net>
	   Author.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						    STRUCT TID_AMPDU_RX(9)

Linux and UNIX Man Pages

struct_sk_buff(9) [centos man page]

Check Out this Related Man Page