| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef __LINUX_IF_PACKET_H |
| 2 | #define __LINUX_IF_PACKET_H |
| 3 | |
| 4 | struct sockaddr_pkt |
| 5 | { |
| 6 | unsigned short spkt_family; |
| 7 | unsigned char spkt_device[14]; |
| 8 | unsigned short spkt_protocol; |
| 9 | }; |
| 10 | |
| 11 | struct sockaddr_ll |
| 12 | { |
| 13 | unsigned short sll_family; |
| 14 | unsigned short sll_protocol; |
| 15 | int sll_ifindex; |
| 16 | unsigned short sll_hatype; |
| 17 | unsigned char sll_pkttype; |
| 18 | unsigned char sll_halen; |
| 19 | unsigned char sll_addr[8]; |
| 20 | }; |
| 21 | |
| 22 | /* Packet types */ |
| 23 | |
| 24 | #define PACKET_HOST 0 /* To us */ |
| 25 | #define PACKET_BROADCAST 1 /* To all */ |
| 26 | #define PACKET_MULTICAST 2 /* To group */ |
| 27 | #define PACKET_OTHERHOST 3 /* To someone else */ |
| 28 | #define PACKET_OUTGOING 4 /* Outgoing of any type */ |
| 29 | /* These ones are invisible by user level */ |
| 30 | #define PACKET_LOOPBACK 5 /* MC/BRD frame looped back */ |
| 31 | #define PACKET_FASTROUTE 6 /* Fastrouted frame */ |
| 32 | |
| 33 | /* Packet socket options */ |
| 34 | |
| 35 | #define PACKET_ADD_MEMBERSHIP 1 |
| 36 | #define PACKET_DROP_MEMBERSHIP 2 |
| 37 | #define PACKET_RECV_OUTPUT 3 |
| 38 | /* Value 4 is still used by obsolete turbo-packet. */ |
| 39 | #define PACKET_RX_RING 5 |
| 40 | #define PACKET_STATISTICS 6 |
| 41 | #define PACKET_COPY_THRESH 7 |
| 42 | |
| 43 | struct tpacket_stats |
| 44 | { |
| 45 | unsigned int tp_packets; |
| 46 | unsigned int tp_drops; |
| 47 | }; |
| 48 | |
| 49 | struct tpacket_hdr |
| 50 | { |
| 51 | unsigned long tp_status; |
| 52 | #define TP_STATUS_KERNEL 0 |
| 53 | #define TP_STATUS_USER 1 |
| 54 | #define TP_STATUS_COPY 2 |
| 55 | #define TP_STATUS_LOSING 4 |
| 56 | #define TP_STATUS_CSUMNOTREADY 8 |
| 57 | unsigned int tp_len; |
| 58 | unsigned int tp_snaplen; |
| 59 | unsigned short tp_mac; |
| 60 | unsigned short tp_net; |
| 61 | unsigned int tp_sec; |
| 62 | unsigned int tp_usec; |
| 63 | }; |
| 64 | |
| 65 | #define TPACKET_ALIGNMENT 16 |
| 66 | #define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1)) |
| 67 | #define TPACKET_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll)) |
| 68 | |
| 69 | /* |
| 70 | Frame structure: |
| 71 | |
| 72 | - Start. Frame must be aligned to TPACKET_ALIGNMENT=16 |
| 73 | - struct tpacket_hdr |
| 74 | - pad to TPACKET_ALIGNMENT=16 |
| 75 | - struct sockaddr_ll |
| 76 | - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16 |
| 77 | - Start+tp_mac: [ Optional MAC header ] |
| 78 | - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16. |
| 79 | - Pad to align to TPACKET_ALIGNMENT=16 |
| 80 | */ |
| 81 | |
| 82 | struct tpacket_req |
| 83 | { |
| 84 | unsigned int tp_block_size; /* Minimal size of contiguous block */ |
| 85 | unsigned int tp_block_nr; /* Number of blocks */ |
| 86 | unsigned int tp_frame_size; /* Size of frame */ |
| 87 | unsigned int tp_frame_nr; /* Total number of frames */ |
| 88 | }; |
| 89 | |
| 90 | struct packet_mreq |
| 91 | { |
| 92 | int mr_ifindex; |
| 93 | unsigned short mr_type; |
| 94 | unsigned short mr_alen; |
| 95 | unsigned char mr_address[8]; |
| 96 | }; |
| 97 | |
| 98 | #define PACKET_MR_MULTICAST 0 |
| 99 | #define PACKET_MR_PROMISC 1 |
| 100 | #define PACKET_MR_ALLMULTI 2 |
| 101 | |
| 102 | #endif |