~kris/9p

9hist

ref: a98497b10909acac0d87f67dc031f2cbe3d62dbf 9hist/ss/arp.h -rw-r--r-- 658 bytes
a98497b1 — David du Colombier Plan 9 from Bell Labs 1991-06-26 35 years ago 
                                                                                
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

typedef struct Arppkt	Arppkt;
typedef struct Arpentry	Arpentry;
typedef struct Arpstats	Arpstats;

/* Format of ethernet arp request */
struct Arppkt {
	uchar	d[6];
	uchar	s[6];
	uchar	type[2];
	uchar	hrd[2];
	uchar	pro[2];
	uchar	hln;
	uchar	pln;
	uchar	op[2];
	uchar	sha[6];
	uchar	spa[4];
	uchar	tha[6];
	uchar	tpa[4];
	};

/* Format of request from starp to user level arpd */
struct Arpentry {
	uchar	etaddr[6];
	uchar	ipaddr[4];
	};

/* Arp cache statistics */
struct Arpstats {
	int	hit;
	int	miss;
	int	failed;
	};

#define ET_ARP		0x0806
#define ET_RARP		0x8035

#define ARP_REQUEST	1
#define ARP_REPLY	2
#define RARP_REQUEST	3
#define RARP_REPLY	4