Linux kernel & device driver programming

Cross-Referenced Linux and Device Driver Code

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Version: [ 2.6.11.8 ] [ 2.6.25 ] [ 2.6.25.8 ] [ 2.6.31.13 ] Architecture: [ i386 ]
  1 #ifndef __LINUX_IF_PACKET_H
  2 #define __LINUX_IF_PACKET_H
  3 
  4 #include <linux/types.h>
  5 
  6 struct sockaddr_pkt
  7 {
  8         unsigned short spkt_family;
  9         unsigned char spkt_device[14];
 10         __be16 spkt_protocol;
 11 };
 12 
 13 struct sockaddr_ll
 14 {
 15         unsigned short  sll_family;
 16         __be16          sll_protocol;
 17         int             sll_ifindex;
 18         unsigned short  sll_hatype;
 19         unsigned char   sll_pkttype;
 20         unsigned char   sll_halen;
 21         unsigned char   sll_addr[8];
 22 };
 23 
 24 /* Packet types */
 25 
 26 #define PACKET_HOST             0               /* To us                */
 27 #define PACKET_BROADCAST        1               /* To all               */
 28 #define PACKET_MULTICAST        2               /* To group             */
 29 #define PACKET_OTHERHOST        3               /* To someone else      */
 30 #define PACKET_OUTGOING         4               /* Outgoing of any type */
 31 /* These ones are invisible by user level */
 32 #define PACKET_LOOPBACK         5               /* MC/BRD frame looped back */
 33 #define PACKET_FASTROUTE        6               /* Fastrouted frame     */
 34 
 35 /* Packet socket options */
 36 
 37 #define PACKET_ADD_MEMBERSHIP           1
 38 #define PACKET_DROP_MEMBERSHIP          2
 39 #define PACKET_RECV_OUTPUT              3
 40 /* Value 4 is still used by obsolete turbo-packet. */
 41 #define PACKET_RX_RING                  5
 42 #define PACKET_STATISTICS               6
 43 #define PACKET_COPY_THRESH              7
 44 #define PACKET_AUXDATA                  8
 45 #define PACKET_ORIGDEV                  9
 46 
 47 struct tpacket_stats
 48 {
 49         unsigned int    tp_packets;
 50         unsigned int    tp_drops;
 51 };
 52 
 53 struct tpacket_auxdata
 54 {
 55         __u32           tp_status;
 56         __u32           tp_len;
 57         __u32           tp_snaplen;
 58         __u16           tp_mac;
 59         __u16           tp_net;
 60 };
 61 
 62 struct tpacket_hdr
 63 {
 64         unsigned long   tp_status;
 65 #define TP_STATUS_KERNEL        0
 66 #define TP_STATUS_USER          1
 67 #define TP_STATUS_COPY          2
 68 #define TP_STATUS_LOSING        4
 69 #define TP_STATUS_CSUMNOTREADY  8
 70         unsigned int    tp_len;
 71         unsigned int    tp_snaplen;
 72         unsigned short  tp_mac;
 73         unsigned short  tp_net;
 74         unsigned int    tp_sec;
 75         unsigned int    tp_usec;
 76 };
 77 
 78 #define TPACKET_ALIGNMENT       16
 79 #define TPACKET_ALIGN(x)        (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
 80 #define TPACKET_HDRLEN          (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
 81 
 82 /*
 83    Frame structure:
 84 
 85    - Start. Frame must be aligned to TPACKET_ALIGNMENT=16
 86    - struct tpacket_hdr
 87    - pad to TPACKET_ALIGNMENT=16
 88    - struct sockaddr_ll
 89    - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
 90    - Start+tp_mac: [ Optional MAC header ]
 91    - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
 92    - Pad to align to TPACKET_ALIGNMENT=16
 93  */
 94 
 95 struct tpacket_req
 96 {
 97         unsigned int    tp_block_size;  /* Minimal size of contiguous block */
 98         unsigned int    tp_block_nr;    /* Number of blocks */
 99         unsigned int    tp_frame_size;  /* Size of frame */
100         unsigned int    tp_frame_nr;    /* Total number of frames */
101 };
102 
103 struct packet_mreq
104 {
105         int             mr_ifindex;
106         unsigned short  mr_type;
107         unsigned short  mr_alen;
108         unsigned char   mr_address[8];
109 };
110 
111 #define PACKET_MR_MULTICAST     0
112 #define PACKET_MR_PROMISC       1
113 #define PACKET_MR_ALLMULTI      2
114 
115 #endif
116 
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