Subversion Repositories planix.SVN

Rev

Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
2 - 1 
#include <u.h>
2 
#include <libc.h>
3 
#include <ip.h>
4 
 
5 
static uchar classmask[4][16] = {
6 
	0xff,0xff,0xff,0xff,  0xff,0xff,0xff,0xff,  0xff,0xff,0xff,0xff,  0xff,0x00,0x00,0x00,
7 
	0xff,0xff,0xff,0xff,  0xff,0xff,0xff,0xff,  0xff,0xff,0xff,0xff,  0xff,0x00,0x00,0x00,
8 
	0xff,0xff,0xff,0xff,  0xff,0xff,0xff,0xff,  0xff,0xff,0xff,0xff,  0xff,0xff,0x00,0x00,
9 
	0xff,0xff,0xff,0xff,  0xff,0xff,0xff,0xff,  0xff,0xff,0xff,0xff,  0xff,0xff,0xff,0x00,
10 
};
11 
 
12 
static uchar v6loopback[IPaddrlen] = {
13 
	0, 0, 0, 0,
14 
	0, 0, 0, 0,
15 
	0, 0, 0, 0,
16 
	0, 0, 0, 0x01
17 
};
18 
 
19 
static uchar v6linklocal[IPaddrlen] = {
20 
	0xfe, 0x80, 0, 0,
21 
	0, 0, 0, 0,
22 
	0, 0, 0, 0,
23 
	0, 0, 0, 0
24 
};
25 
static uchar v6linklocalmask[IPaddrlen] = {
26 
	0xff, 0xff, 0xff, 0xff,
27 
	0xff, 0xff, 0xff, 0xff,
28 
	0, 0, 0, 0,
29 
	0, 0, 0, 0
30 
};
31 
static int v6llpreflen = 8;	/* link-local prefix length in bytes */
32 
 
33 
static uchar v6multicast[IPaddrlen] = {
34 
	0xff, 0, 0, 0,
35 
	0, 0, 0, 0,
36 
	0, 0, 0, 0,
37 
	0, 0, 0, 0
38 
};
39 
static uchar v6multicastmask[IPaddrlen] = {
40 
	0xff, 0, 0, 0,
41 
	0, 0, 0, 0,
42 
	0, 0, 0, 0,
43 
	0, 0, 0, 0
44 
};
45 
static int v6mcpreflen = 1;	/* multicast prefix length */
46 
 
47 
static uchar v6solicitednode[IPaddrlen] = {
48 
	0xff, 0x02, 0, 0,
49 
	0, 0, 0, 0,
50 
	0, 0, 0, 0x01,
51 
	0xff, 0, 0, 0
52 
};
53 
static uchar v6solicitednodemask[IPaddrlen] = {
54 
	0xff, 0xff, 0xff, 0xff,
55 
	0xff, 0xff, 0xff, 0xff,
56 
	0xff, 0xff, 0xff, 0xff,
57 
	0xff, 0x0, 0x0, 0x0
58 
};
59 
static int v6snpreflen = 13;
60 
 
61 
uchar*
62 
defmask(uchar *ip)
63 
{
64 
	if(isv4(ip))
65 
		return classmask[ip[IPv4off]>>6];
66 
	else {
67 
		if(ipcmp(ip, v6loopback) == 0)
68 
			return IPallbits;
69 
		else if(memcmp(ip, v6linklocal, v6llpreflen) == 0)
70 
			return v6linklocalmask;
71 
		else if(memcmp(ip, v6solicitednode, v6snpreflen) == 0)
72 
			return v6solicitednodemask;
73 
		else if(memcmp(ip, v6multicast, v6mcpreflen) == 0)
74 
			return v6multicastmask;
75 
		return IPallbits;
76 
	}
77 
}
78 
 
79 
void
80 
maskip(uchar *from, uchar *mask, uchar *to)
81 
{
82 
	int i;
83 
 
84 
	for(i = 0; i < IPaddrlen; i++)
85 
		to[i] = from[i] & mask[i];
86 
}