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0e11c91e1e
Weirdness: the third argument of socket() is net-endian here. Oh, well - it's documented in packet(7). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
105 lines
2.5 KiB
C
105 lines
2.5 KiB
C
#ifndef __LINUX_IF_PACKET_H
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#define __LINUX_IF_PACKET_H
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#include <linux/types.h>
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struct sockaddr_pkt
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{
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unsigned short spkt_family;
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unsigned char spkt_device[14];
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__be16 spkt_protocol;
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};
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struct sockaddr_ll
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{
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unsigned short sll_family;
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__be16 sll_protocol;
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int sll_ifindex;
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unsigned short sll_hatype;
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unsigned char sll_pkttype;
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unsigned char sll_halen;
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unsigned char sll_addr[8];
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};
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/* Packet types */
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#define PACKET_HOST 0 /* To us */
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#define PACKET_BROADCAST 1 /* To all */
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#define PACKET_MULTICAST 2 /* To group */
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#define PACKET_OTHERHOST 3 /* To someone else */
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#define PACKET_OUTGOING 4 /* Outgoing of any type */
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/* These ones are invisible by user level */
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#define PACKET_LOOPBACK 5 /* MC/BRD frame looped back */
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#define PACKET_FASTROUTE 6 /* Fastrouted frame */
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/* Packet socket options */
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#define PACKET_ADD_MEMBERSHIP 1
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#define PACKET_DROP_MEMBERSHIP 2
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#define PACKET_RECV_OUTPUT 3
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/* Value 4 is still used by obsolete turbo-packet. */
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#define PACKET_RX_RING 5
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#define PACKET_STATISTICS 6
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#define PACKET_COPY_THRESH 7
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struct tpacket_stats
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{
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unsigned int tp_packets;
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unsigned int tp_drops;
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};
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struct tpacket_hdr
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{
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unsigned long tp_status;
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#define TP_STATUS_KERNEL 0
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#define TP_STATUS_USER 1
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#define TP_STATUS_COPY 2
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#define TP_STATUS_LOSING 4
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#define TP_STATUS_CSUMNOTREADY 8
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unsigned int tp_len;
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unsigned int tp_snaplen;
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unsigned short tp_mac;
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unsigned short tp_net;
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unsigned int tp_sec;
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unsigned int tp_usec;
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};
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#define TPACKET_ALIGNMENT 16
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#define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
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#define TPACKET_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
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/*
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Frame structure:
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- Start. Frame must be aligned to TPACKET_ALIGNMENT=16
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- struct tpacket_hdr
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- pad to TPACKET_ALIGNMENT=16
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- struct sockaddr_ll
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- Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
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- Start+tp_mac: [ Optional MAC header ]
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- Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
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- Pad to align to TPACKET_ALIGNMENT=16
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*/
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struct tpacket_req
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{
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unsigned int tp_block_size; /* Minimal size of contiguous block */
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unsigned int tp_block_nr; /* Number of blocks */
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unsigned int tp_frame_size; /* Size of frame */
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unsigned int tp_frame_nr; /* Total number of frames */
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};
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struct packet_mreq
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{
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int mr_ifindex;
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unsigned short mr_type;
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unsigned short mr_alen;
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unsigned char mr_address[8];
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};
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#define PACKET_MR_MULTICAST 0
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#define PACKET_MR_PROMISC 1
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#define PACKET_MR_ALLMULTI 2
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#endif
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