Watt-32 tcp/ip  2.2 dev-rel.10
if_packe.h
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1 
5 #ifndef __LINUX_IF_PACKET_H
6 #define __LINUX_IF_PACKET_H
7 
9 {
10  unsigned short spkt_family;
11  unsigned char spkt_device[14];
12  unsigned short spkt_protocol;
13 };
14 
16 {
17  unsigned short sll_family;
18  unsigned short sll_protocol;
19  int sll_ifindex;
20  unsigned short sll_hatype;
21  unsigned char sll_pkttype;
22  unsigned char sll_halen;
23  unsigned char sll_addr[8];
24 };
25 
26 /* Packet types */
27 
28 #define PACKET_HOST 0 /* To us */
29 #define PACKET_BROADCAST 1 /* To all */
30 #define PACKET_MULTICAST 2 /* To group */
31 #define PACKET_OTHERHOST 3 /* To someone else */
32 #define PACKET_OUTGOING 4 /* Outgoing of any type */
33 
34 /* These ones are invisible by user level */
35 #define PACKET_LOOPBACK 5 /* MC/BRD frame looped back */
36 #define PACKET_FASTROUTE 6 /* Fastrouted frame */
37 
38 /* Packet socket options */
39 
40 #define PACKET_ADD_MEMBERSHIP 1
41 #define PACKET_DROP_MEMBERSHIP 2
42 #define PACKET_RECV_OUTPUT 3
43 
44 /* Value 4 is still used by obsolete turbo-packet. */
45 #define PACKET_RX_RING 5
46 #define PACKET_STATISTICS 6
47 #define PACKET_COPY_THRESH 7
48 
50 {
51  unsigned int tp_packets;
52  unsigned int tp_drops;
53 };
54 
56 {
57  unsigned long tp_status;
58 #define TP_STATUS_KERNEL 0
59 #define TP_STATUS_USER 1
60 #define TP_STATUS_COPY 2
61 #define TP_STATUS_LOSING 4
62 #define TP_STATUS_CSUMNOTREADY 8
63  unsigned int tp_len;
64  unsigned int tp_snaplen;
65  unsigned short tp_mac;
66  unsigned short tp_net;
67  unsigned int tp_sec;
68  unsigned int tp_usec;
69 };
70 
71 #define TPACKET_ALIGNMENT 16
72 #define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1) & ~(TPACKET_ALIGNMENT-1))
73 #define TPACKET_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
74 
75 /*
76  Frame structure:
77 
78  - Start. Frame must be aligned to TPACKET_ALIGNMENT=16
79  - struct tpacket_hdr
80  - pad to TPACKET_ALIGNMENT=16
81  - struct sockaddr_ll
82  - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
83  - Start+tp_mac: [ Optional MAC header ]
84  - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
85  - Pad to align to TPACKET_ALIGNMENT=16
86  */
87 
89 {
90  unsigned int tp_block_size; /* Minimal size of contiguous block */
91  unsigned int tp_block_nr; /* Number of blocks */
92  unsigned int tp_frame_size; /* Size of frame */
93  unsigned int tp_frame_nr; /* Total number of frames */
94 };
95 
97 {
98  int mr_ifindex;
99  unsigned short mr_type;
100  unsigned short mr_alen;
101  unsigned char mr_address[8];
102 };
103 
104 #define PACKET_MR_MULTICAST 0
105 #define PACKET_MR_PROMISC 1
106 #define PACKET_MR_ALLMULTI 2
107 
108 #endif