/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef __LINUX_IF_PACKET_H
#define __LINUX_IF_PACKET_H
#include <asm/byteorder.h>
#include <linux/types.h>
struct sockaddr_pkt {
unsigned short spkt_family;
unsigned char spkt_device[14];
__be16 spkt_protocol;
};
struct sockaddr_ll {
unsigned short sll_family;
__be16 sll_protocol;
int sll_ifindex;
unsigned short sll_hatype;
unsigned char sll_pkttype;
unsigned char sll_halen;
unsigned char sll_addr[8];
};
/* Packet types */
#define PACKET_HOST 0 /* To us */
#define PACKET_BROADCAST 1 /* To all */
#define PACKET_MULTICAST 2 /* To group */
#define PACKET_OTHERHOST 3 /* To someone else */
#define PACKET_OUTGOING 4 /* Outgoing of any type */
#define PACKET_LOOPBACK 5 /* MC/BRD frame looped back */
#define PACKET_USER 6 /* To user space */
#define PACKET_KERNEL 7 /* To kernel space */
/* Unused, PACKET_FASTROUTE and PACKET_LOOPBACK are invisible to user space */
#define PACKET_FASTROUTE 6 /* Fastrouted frame */
/* Packet socket options */
#define PACKET_ADD_MEMBERSHIP 1
#define PACKET_DROP_MEMBERSHIP 2
#define PACKET_RECV_OUTPUT 3
/* Value 4 is still used by obsolete turbo-packet. */
#define PACKET_RX_RING 5
#define PACKET_STATISTICS 6
#define PACKET_COPY_THRESH 7
#define PACKET_AUXDATA 8
#define PACKET_ORIGDEV 9
#define PACKET_VERSION 10
#define PACKET_HDRLEN 11
#define PACKET_RESERVE 12
#define PACKET_TX_RING 13
#define PACKET_LOSS 14
#define PACKET_VNET_HDR 15
#define PACKET_TX_TIMESTAMP 16
#define PACKET_TIMESTAMP 17
#define PACKET_FANOUT 18
#define PACKET_TX_HAS_OFF 19
#define PACKET_QDISC_BYPASS 20
#define PACKET_ROLLOVER_STATS 21
#define PACKET_FANOUT_DATA 22
#define PACKET_IGNORE_OUTGOING 23
#define PACKET_FANOUT_HASH 0
#define PACKET_FANOUT_LB 1
#define PACKET_FANOUT_CPU 2
#define PACKET_FANOUT_ROLLOVER 3
#define PACKET_FANOUT_RND 4
#define PACKET_FANOUT_QM 5
#define PACKET_FANOUT_CBPF 6
#define PACKET_FANOUT_EBPF 7
#define PACKET_FANOUT_FLAG_ROLLOVER 0x1000
#define PACKET_FANOUT_FLAG_UNIQUEID 0x2000
#define PACKET_FANOUT_FLAG_DEFRAG 0x8000
struct tpacket_stats {
unsigned int tp_packets;
unsigned int tp_drops;
};
struct tpacket_stats_v3 {
unsigned int tp_packets;
unsigned int tp_drops;
unsigned int tp_freeze_q_cnt;
};
struct tpacket_rollover_stats {
__aligned_u64 tp_all;
__aligned_u64 tp_huge;
__aligned_u64 tp_failed;
};
union tpacket_stats_u {
struct tpacket_stats stats1;
struct tpacket_stats_v3 stats3;
};
struct tpacket_auxdata {
__u32 tp_status;
__u32 tp_len;
__u32 tp_snaplen;
__u16 tp_mac;
__u16 tp_net;
__u16 tp_vlan_tci;
__u16 tp_vlan_tpid;
};
/* Rx ring - header status */
#define TP_STATUS_KERNEL 0
#define TP_STATUS_USER (1 << 0)
#define TP_STATUS_COPY (1 << 1)
#define TP_STATUS_LOSING (1 << 2)
#define TP_STATUS_CSUMNOTREADY (1 << 3)
#define TP_STATUS_VLAN_VALID (1 << 4) /* auxdata has valid tp_vlan_tci */
#define TP_STATUS_BLK_TMO (1 << 5)
#define TP_STATUS_VLAN_TPID_VALID (1 << 6) /* auxdata has valid tp_vlan_tpid */
#define TP_STATUS_CSUM_VALID (1 << 7)
#define TP_STATUS_GSO_TCP (1 << 8)
/* Tx ring - header status */
#define TP_STATUS_AVAILABLE 0
#define TP_STATUS_SEND_REQUEST (1 << 0)
#define TP_STATUS_SENDING (1 << 1)
#define TP_STATUS_WRONG_FORMAT (1 << 2)
/* Rx and Tx ring - header status */
#define TP_STATUS_TS_SOFTWARE (1 << 29)
#define TP_STATUS_TS_SYS_HARDWARE (1 << 30) /* deprecated, never set */
#define TP_STATUS_TS_RAW_HARDWARE (1U << 31)
/* Rx ring - feature request bits */
#define TP_FT_REQ_FILL_RXHASH 0x1
struct tpacket_hdr {
unsigned long tp_status;
unsigned int tp_len;
unsigned int tp_snaplen;
unsigned short tp_mac;
unsigned short tp_net;
unsigned int tp_sec;
unsigned int tp_usec;
};
#define TPACKET_ALIGNMENT 16
#define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
#define TPACKET_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
struct tpacket2_hdr {
__u32 tp_status;
__u32 tp_len;
__u32 tp_snaplen;
__u16 tp_mac;
__u16 tp_net;
__u32 tp_sec;
__u32 tp_nsec;
__u16 tp_vlan_tci;
__u16 tp_vlan_tpid;
__u8 tp_padding[4];
};
struct tpacket_hdr_variant1 {
__u32 tp_rxhash;
__u32 tp_vlan_tci;
__u16 tp_vlan_tpid;
__u16 tp_padding;
};
struct tpacket3_hdr {
__u32 tp_next_offset;
__u32 tp_sec;
__u32 tp_nsec;
__u32 tp_snaplen;
__u32 tp_len;
__u32 tp_status;
__u16 tp_mac;
__u16 tp_net;
/* pkt_hdr variants */
union {
struct tpacket_hdr_variant1 hv1;
};
__u8 tp_padding[8];
};
struct tpacket_bd_ts {
unsigned int ts_sec;
union {
unsigned int ts_usec;
unsigned int ts_nsec;
};
};
struct tpacket_hdr_v1 {
__u32 block_status;
__u32 num_pkts;
__u32 offset_to_first_pkt;
/* Number of valid bytes (including padding)
* blk_len <= tp_block_size
*/
__u32 blk_len;
/*
* Quite a few uses of sequence number:
* 1. Make sure cache flush etc worked.
* Well, one can argue - why not use the increasing ts below?
* But look at 2. below first.
* 2. When you pass around blocks to other user space decoders,
* you can see which blk[s] is[are] outstanding etc.
* 3. Validate kernel code.
*/
__aligned_u64 seq_num;
/*
* ts_last_pkt:
*
* Case 1. Block has 'N'(N >=1) packets and TMO'd(timed out)
* ts_last_pkt == 'time-stamp of last packet' and NOT the
* time when the timer fired and the block was closed.
* By providing the ts of the last packet we can absolutely
* guarantee that time-stamp wise, the first packet in the
* next block will never precede the last packet of the
* previous block.
* Case 2. Block has zero packets and TMO'd
* ts_last_pkt = time when the timer fired and the block
* was closed.
* Case 3. Block has 'N' packets and NO TMO.
* ts_last_pkt = time-stamp of the last pkt in the block.
*
* ts_first_pkt:
* Is always the time-stamp when the block was opened.
* Case a) ZERO packets
* No packets to deal with but atleast you know the
* time-interval of this block.
* Case b) Non-zero packets
* Use the ts of the first packet in the block.
*
*/
struct tpacket_bd_ts ts_first_pkt, ts_last_pkt;
};
union tpacket_bd_header_u {
struct tpacket_hdr_v1 bh1;
};
struct tpacket_block_desc {
__u32 version;
__u32 offset_to_priv;
union tpacket_bd_header_u hdr;
};
#define TPACKET2_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll))
#define TPACKET3_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket3_hdr)) + sizeof(struct sockaddr_ll))
enum tpacket_versions {
TPACKET_V1,
TPACKET_V2,
TPACKET_V3
};
/*
Frame structure:
- Start. Frame must be aligned to TPACKET_ALIGNMENT=16
- struct tpacket_hdr
- pad to TPACKET_ALIGNMENT=16
- struct sockaddr_ll
- Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
- Start+tp_mac: [ Optional MAC header ]
- Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
- Pad to align to TPACKET_ALIGNMENT=16
*/
struct tpacket_req {
unsigned int tp_block_size; /* Minimal size of contiguous block */
unsigned int tp_block_nr; /* Number of blocks */
unsigned int tp_frame_size; /* Size of frame */
unsigned int tp_frame_nr; /* Total number of frames */
};
struct tpacket_req3 {
unsigned int tp_block_size; /* Minimal size of contiguous block */
unsigned int tp_block_nr; /* Number of blocks */
unsigned int tp_frame_size; /* Size of frame */
unsigned int tp_frame_nr; /* Total number of frames */
unsigned int tp_retire_blk_tov; /* timeout in msecs */
unsigned int tp_sizeof_priv; /* offset to private data area */
unsigned int tp_feature_req_word;
};
union tpacket_req_u {
struct tpacket_req req;
struct tpacket_req3 req3;
};
struct packet_mreq {
int mr_ifindex;
unsigned short mr_type;
unsigned short mr_alen;
unsigned char mr_address[8];
};
struct fanout_args {
#if defined(__LITTLE_ENDIAN_BITFIELD)
__u16 id;
__u16 type_flags;
#else
__u16 type_flags;
__u16 id;
#endif
__u32 max_num_members;
};
#define PACKET_MR_MULTICAST 0
#define PACKET_MR_PROMISC 1
#define PACKET_MR_ALLMULTI 2
#define PACKET_MR_UNICAST 3
#endif
Directory Contents
Dirs: 27 × Files: 551
!"#$%&'(()*+,-./00123456789 t\
wIDATx ]ys 47Y ƒ - " Rv < f{Ɛ $k l L > L ~h^ 1 [ r G t& h
l F z3O Y ! p A(_g̷ E8 )S 8 c Kb"z ~ 5 J xAL WU < *
5 m;W a pB h ~P J
2 3 6 ҙ .Ƹ P i 4g
F R L P ΪK/D M v (a3
k J
Œ4N5* SH ` SdJ z O J Xՠ V> u ߱ BE&L b2 ?2` tX+ c CB A$ i b C ĀMB E : / # Dx &l =q Ty 0 \p I ( L Ǎ { e
4k ;`u^ｦ eP!( d { )T A 8 O;Ě n >;s6 ! :Nx `[S D HU ~ qJ F}
a g*D 49 / pn k h (t 8NxƐF _!r չ7
ZR R q/5") Ӎ NY 0 x sZ! o
fu , K"$ ? pg 㕣= 1» {h " fh7
y } +7 $ y
" X ą - G P u 4 m >J 5 L =V ' ^@I p ?MS xЌ XV P ! h "C NS9B8̢ ]!K e zA , ӏkbY !< XQ ٿyS| *" f { w 4@[S <
# 0 ! js [m =,~ o
"ݎ DHf Wo $ g ! Vԅ t mB /y Wf V4 c+@x? B ~u " xUN e 0 BĂ)
~J pz!
7 y6]l Ԥ@ P a< O /DHC `≻ N m"$ 0ObB }{ x AO FCG D R ^ "B { WDH UR l@ T
# +"d T ; 0 i D}. 7 ` ' ] w rE &S i ƕiTD EL P _ u h $ Ա FG wVD G L R Zf ' .!] J /ZR oGЍ s Mr Ĥ ʬ 3 Q [3 cL ` ^ p +
( F;# B 5 ' 2Y f [ ϶R0e } E 7
6M aۮ H <& n % L] E}Up x紉, Uw' Q Ǯշo k ވۙ 0N94 VX5 xEDE l D #֤ } C o )W : ^ s 9 bRf iX5u ཱི 4 :[ T 1. | [E 2ؽ Iy\ : o x K G 5
ylP ' uK E
ftb/i[3 .g _ [3M n
G, #NwQ5~
ؚ) | n =Ц"x qg gB ` 듘 ~ x w ?
?
R~ _ u. &V Q K˻ H C ( TN˄+ `C dA n B D 3"Z G ê ^k H_ /- ~ " R_ .8 Z_ 6@ o xg uP ? 3լ @7AM! E7^
- =V L x g-D0 CtmW 7 O G _ WD0 g C w1 r
d w : a | \ *" f nֳ ^ H# f L ` Z ۽hV }S F r0Ù Bć5r] @! NL iQ]{s^=4 d WD " " M;
t" 8 5 e dL| "-*st" ) SWD ?R[S e ooF 20.D ? bo =) A i o d ģ ZҰaO
@E =) i D a &ܟa CϞ y6 ,<%{^x%{f8? `iw^ ?/
M
* IEND B`