| 1 | #ifndef __LINUX_IF_PACKET_H |
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| 2 | #define __LINUX_IF_PACKET_H |
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| 3 | |
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| 4 | struct sockaddr_pkt |
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| 5 | { |
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| 6 | unsigned short spkt_family; |
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| 7 | unsigned char spkt_device[14]; |
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| 8 | unsigned short spkt_protocol; |
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| 9 | }; |
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| 10 | |
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| 11 | struct sockaddr_ll |
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| 12 | { |
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| 13 | unsigned short sll_family; |
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| 14 | unsigned short sll_protocol; |
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| 15 | int sll_ifindex; |
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| 16 | unsigned short sll_hatype; |
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| 17 | unsigned char sll_pkttype; |
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| 18 | unsigned char sll_halen; |
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| 19 | unsigned char sll_addr[8]; |
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| 20 | }; |
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| 21 | |
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| 22 | /* Packet types */ |
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| 23 | |
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| 24 | #define PACKET_HOST 0 /* To us */ |
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| 25 | #define PACKET_BROADCAST 1 /* To all */ |
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| 26 | #define PACKET_MULTICAST 2 /* To group */ |
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| 27 | #define PACKET_OTHERHOST 3 /* To someone else */ |
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| 28 | #define PACKET_OUTGOING 4 /* Outgoing of any type */ |
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| 29 | /* These ones are invisible by user level */ |
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| 30 | #define PACKET_LOOPBACK 5 /* MC/BRD frame looped back */ |
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| 31 | #define PACKET_FASTROUTE 6 /* Fastrouted frame */ |
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| 32 | |
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| 33 | /* Packet socket options */ |
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| 34 | |
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| 35 | #define PACKET_ADD_MEMBERSHIP 1 |
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| 36 | #define PACKET_DROP_MEMBERSHIP 2 |
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| 37 | #define PACKET_RECV_OUTPUT 3 |
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| 38 | /* Value 4 is still used by obsolete turbo-packet. */ |
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| 39 | #define PACKET_RX_RING 5 |
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| 40 | #define PACKET_STATISTICS 6 |
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| 41 | #define PACKET_COPY_THRESH 7 |
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| 42 | |
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| 43 | struct tpacket_stats |
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| 44 | { |
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| 45 | unsigned int tp_packets; |
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| 46 | unsigned int tp_drops; |
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| 47 | }; |
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| 48 | |
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| 49 | struct tpacket_hdr |
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| 50 | { |
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| 51 | unsigned long tp_status; |
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| 52 | #define TP_STATUS_KERNEL 0 |
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| 53 | #define TP_STATUS_USER 1 |
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| 54 | #define TP_STATUS_COPY 2 |
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| 55 | #define TP_STATUS_LOSING 4 |
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| 56 | #define TP_STATUS_CSUMNOTREADY 8 |
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| 57 | unsigned int tp_len; |
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| 58 | unsigned int tp_snaplen; |
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| 59 | unsigned short tp_mac; |
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| 60 | unsigned short tp_net; |
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| 61 | unsigned int tp_sec; |
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| 62 | unsigned int tp_usec; |
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| 63 | }; |
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| 64 | |
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| 65 | #define TPACKET_ALIGNMENT 16 |
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| 66 | #define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1)) |
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| 67 | #define TPACKET_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll)) |
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| 68 | |
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| 69 | /* |
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| 70 | Frame structure: |
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| 71 | |
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| 72 | - Start. Frame must be aligned to TPACKET_ALIGNMENT=16 |
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| 73 | - struct tpacket_hdr |
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| 74 | - pad to TPACKET_ALIGNMENT=16 |
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| 75 | - struct sockaddr_ll |
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| 76 | - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16 |
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| 77 | - Start+tp_mac: [ Optional MAC header ] |
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| 78 | - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16. |
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| 79 | - Pad to align to TPACKET_ALIGNMENT=16 |
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| 80 | */ |
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| 81 | |
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| 82 | struct tpacket_req |
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| 83 | { |
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| 84 | unsigned int tp_block_size; /* Minimal size of contiguous block */ |
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| 85 | unsigned int tp_block_nr; /* Number of blocks */ |
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| 86 | unsigned int tp_frame_size; /* Size of frame */ |
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| 87 | unsigned int tp_frame_nr; /* Total number of frames */ |
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| 88 | }; |
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| 89 | |
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| 90 | struct packet_mreq |
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| 91 | { |
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| 92 | int mr_ifindex; |
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| 93 | unsigned short mr_type; |
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| 94 | unsigned short mr_alen; |
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| 95 | unsigned char mr_address[8]; |
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| 96 | }; |
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| 97 | |
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| 98 | #define PACKET_MR_MULTICAST 0 |
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| 99 | #define PACKET_MR_PROMISC 1 |
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| 100 | #define PACKET_MR_ALLMULTI 2 |
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| 101 | |
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| 102 | #endif |
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