struct_sk_buff

Langue: en

Autres versions - même langue

Version: May 2009 (fedora - 06/07/09)

Section: 9 (Appels noyau Linux)

Sommaire

NAME

struct_sk_buff - socket buffer

SYNOPSIS

 struct sk_buff {
   struct sk_buff * next;
   struct sk_buff * prev;
   struct sock * sk;
   ktime_t tstamp;
   struct net_device * dev;
   union {unnamed_union};
   __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;
   __u8 peeked:1;
   __u8 nf_trace:1;
   __be16 protocol;
   void (* destructor) (struct sk_buff *skb);
 #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
   struct nf_conntrack * nfct;
   struct sk_buff * nfct_reasm;
 #endif
 #ifdef CONFIG_BRIDGE_NETFILTER
   struct nf_bridge_info * nf_bridge;
 #endif
   int iif;
   __u16 queue_mapping;
 #ifdef CONFIG_NET_SCHED
   __u16 tc_index;
 #ifdef CONFIG_NET_CLS_ACT
   __u16 tc_verd;
 #endif
 #endif
 #ifdef CONFIG_IPV6_NDISC_NODETYPE
   __u8 ndisc_nodetype:2;
 #endif
 #if defined(CONFIG_MAC80211) || defined(CONFIG_MAC80211_MODULE)
   __u8 do_not_encrypt:1;
   __u8 requeue:1;
 #endif
 #ifdef CONFIG_NET_DMA
   dma_cookie_t dma_cookie;
 #endif
 #ifdef CONFIG_NETWORK_SECMARK
   __u32 secmark;
 #endif
   __u32 mark;
   __u16 vlan_tci;
   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;
 };

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

{unnamed_union}

anonymous

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

peeked

this packet has been seen already, so stats have been done for it, don't do them again

nf_trace

netfilter packet trace flag

protocol

Packet protocol from driver

destructor

Destruct function

nfct

Associated connection, if any

nfct_reasm

netfilter conntrack re-assembly pointer

nf_bridge

Saved data about a bridged frame - see br_netfilter.c

iif

ifindex of device we arrived on

queue_mapping

Queue mapping for multiqueue devices

tc_index

Traffic control index

tc_verd

traffic control verdict

ndisc_nodetype

router type (from link layer)

do_not_encrypt

set to prevent encryption of this frame

requeue

set to indicate that the wireless core should attempt a software retry on this frame if we failed to receive an ACK for it

dma_cookie

a cookie to one of several possible DMA operations done by skb DMA functions

secmark

security marking

mark

Generic packet mark

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