- #ifndef __LINUX_IF_PACKET_H
- #define __LINUX_IF_PACKET_H
- struct sockaddr_pkt
- {
- unsigned short spkt_family;
- unsigned char spkt_device[14];
- unsigned short spkt_protocol;
- };
- struct sockaddr_ll
- {
- unsigned short sll_family;
- unsigned short 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 */
- /* These ones are invisible by user level */
- #define PACKET_LOOPBACK 5 /* MC/BRD frame looped back */
- #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
- struct tpacket_stats
- {
- unsigned int tp_packets;
- unsigned int tp_drops;
- };
- struct tpacket_hdr
- {
- unsigned long tp_status;
- #define TP_STATUS_KERNEL 0
- #define TP_STATUS_USER 1
- #define TP_STATUS_COPY 2
- #define TP_STATUS_LOSING 4
- #define TP_STATUS_CSUMNOTREADY 8
- 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))
- /*
- 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 packet_mreq
- {
- int mr_ifindex;
- unsigned short mr_type;
- unsigned short mr_alen;
- unsigned char mr_address[8];
- };
- #define PACKET_MR_MULTICAST 0
- #define PACKET_MR_PROMISC 1
- #define PACKET_MR_ALLMULTI 2
- #endif