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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#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_VNET_HDR_SZ 24
#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_IGNORE_OUTGOING 0x4000#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 at least 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) aligns 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