1 d7094239 2003-11-23 devnull #include <u.h>
2 d7094239 2003-11-23 devnull #include <libc.h>
3 d7094239 2003-11-23 devnull #include <ip.h>
7 d7094239 2003-11-23 devnull Isprefix= 16,
10 d7094239 2003-11-23 devnull uchar prefixvals[256] =
12 d7094239 2003-11-23 devnull [0x00] 0 | Isprefix,
13 d7094239 2003-11-23 devnull [0x80] 1 | Isprefix,
14 d7094239 2003-11-23 devnull [0xC0] 2 | Isprefix,
15 d7094239 2003-11-23 devnull [0xE0] 3 | Isprefix,
16 d7094239 2003-11-23 devnull [0xF0] 4 | Isprefix,
17 d7094239 2003-11-23 devnull [0xF8] 5 | Isprefix,
18 d7094239 2003-11-23 devnull [0xFC] 6 | Isprefix,
19 d7094239 2003-11-23 devnull [0xFE] 7 | Isprefix,
20 d7094239 2003-11-23 devnull [0xFF] 8 | Isprefix,
24 d7094239 2003-11-23 devnull eipfmt(Fmt *f)
26 d7094239 2003-11-23 devnull char buf[5*8];
27 d7094239 2003-11-23 devnull static char *efmt = "%.2lux%.2lux%.2lux%.2lux%.2lux%.2lux";
28 d7094239 2003-11-23 devnull static char *ifmt = "%d.%d.%d.%d";
29 d7094239 2003-11-23 devnull uchar *p, ip[16];
30 d7094239 2003-11-23 devnull ulong *lp;
31 d7094239 2003-11-23 devnull ushort s;
32 d7094239 2003-11-23 devnull int i, j, n, eln, eli;
34 d7094239 2003-11-23 devnull switch(f->r) {
35 d7094239 2003-11-23 devnull case 'E': /* Ethernet address */
36 d7094239 2003-11-23 devnull p = va_arg(f->args, uchar*);
37 d7094239 2003-11-23 devnull snprint(buf, sizeof buf, efmt, p[0], p[1], p[2], p[3], p[4], p[5]);
38 d7094239 2003-11-23 devnull return fmtstrcpy(f, buf);
40 d7094239 2003-11-23 devnull case 'I': /* Ip address */
41 d7094239 2003-11-23 devnull p = va_arg(f->args, uchar*);
43 d7094239 2003-11-23 devnull if(memcmp(p, v4prefix, 12) == 0){
44 d7094239 2003-11-23 devnull snprint(buf, sizeof buf, ifmt, p[12], p[13], p[14], p[15]);
45 d7094239 2003-11-23 devnull return fmtstrcpy(f, buf);
48 d7094239 2003-11-23 devnull /* find longest elision */
49 d7094239 2003-11-23 devnull eln = eli = -1;
50 d7094239 2003-11-23 devnull for(i = 0; i < 16; i += 2){
51 d7094239 2003-11-23 devnull for(j = i; j < 16; j += 2)
52 d7094239 2003-11-23 devnull if(p[j] != 0 || p[j+1] != 0)
54 d7094239 2003-11-23 devnull if(j > i && j - i > eln){
56 d7094239 2003-11-23 devnull eln = j - i;
60 d7094239 2003-11-23 devnull /* print with possible elision */
62 d7094239 2003-11-23 devnull for(i = 0; i < 16; i += 2){
63 d7094239 2003-11-23 devnull if(i == eli){
64 d7094239 2003-11-23 devnull n += sprint(buf+n, "::");
65 d7094239 2003-11-23 devnull i += eln;
66 d7094239 2003-11-23 devnull if(i >= 16)
68 d7094239 2003-11-23 devnull } else if(i != 0)
69 d7094239 2003-11-23 devnull n += sprint(buf+n, ":");
70 d7094239 2003-11-23 devnull s = (p[i]<<8) + p[i+1];
71 d7094239 2003-11-23 devnull n += sprint(buf+n, "%ux", s);
73 d7094239 2003-11-23 devnull return fmtstrcpy(f, buf);
75 d7094239 2003-11-23 devnull case 'i': /* v6 address as 4 longs */
76 d7094239 2003-11-23 devnull lp = va_arg(f->args, ulong*);
77 d7094239 2003-11-23 devnull for(i = 0; i < 4; i++)
78 d7094239 2003-11-23 devnull hnputl(ip+4*i, *lp++);
80 d7094239 2003-11-23 devnull goto common;
82 d7094239 2003-11-23 devnull case 'V': /* v4 ip address */
83 d7094239 2003-11-23 devnull p = va_arg(f->args, uchar*);
84 d7094239 2003-11-23 devnull snprint(buf, sizeof buf, ifmt, p[0], p[1], p[2], p[3]);
85 d7094239 2003-11-23 devnull return fmtstrcpy(f, buf);
87 d7094239 2003-11-23 devnull case 'M': /* ip mask */
88 d7094239 2003-11-23 devnull p = va_arg(f->args, uchar*);
90 d7094239 2003-11-23 devnull /* look for a prefix mask */
91 d7094239 2003-11-23 devnull for(i = 0; i < 16; i++)
92 d7094239 2003-11-23 devnull if(p[i] != 0xff)
94 d7094239 2003-11-23 devnull if(i < 16){
95 d7094239 2003-11-23 devnull if((prefixvals[p[i]] & Isprefix) == 0)
96 d7094239 2003-11-23 devnull goto common;
97 d7094239 2003-11-23 devnull for(j = i+1; j < 16; j++)
98 d7094239 2003-11-23 devnull if(p[j] != 0)
99 d7094239 2003-11-23 devnull goto common;
100 d7094239 2003-11-23 devnull n = 8*i + (prefixvals[p[i]] & ~Isprefix);
102 d7094239 2003-11-23 devnull n = 8*16;
104 d7094239 2003-11-23 devnull /* got one, use /xx format */
105 d7094239 2003-11-23 devnull snprint(buf, sizeof buf, "/%d", n);
106 d7094239 2003-11-23 devnull return fmtstrcpy(f, buf);
108 d7094239 2003-11-23 devnull return fmtstrcpy(f, "(eipfmt)");