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#include "fmt.h"
#include "byte.h"
#include "ip4.h"
#include "ip6.h"
unsigned int ip6_fmt(char *s,char ip[16])
{
unsigned int len;
unsigned int i;
unsigned int temp;
unsigned int compressing;
int j;
len = 0; compressing = 0;
for (j=0; j<16; j+=2) {
if (j==12 && ip6_isv4mapped(ip)) {
temp=ip4_fmt(s,ip+12);
len+=temp;
s+=temp;
break;
}
temp = ((unsigned long) (unsigned char) ip[j] << 8) +
(unsigned long) (unsigned char) ip[j+1];
if (temp == 0) {
if (!compressing) {
compressing=1;
if (j==0) {
*s=':'; s+=1; ++len;
}
}
} else {
if (compressing) {
compressing=0;
*s=':'; s+=1; ++len;
}
i = fmt_xlong(s,temp); len += i; if (s) s += i;
if (s && j<14) *s++ = ':'; ++len;
}
}
if (s) *s=0;
return len;
}
static char tohex(char num) {
if (num<10)
return num+'0';
else if (num<16)
return num-10+'a';
else
return -1;
}
unsigned int ip6_fmt_flat(char *s,char ip[16])
{
int i;
for (i=0; i<16; i++) {
*s++=tohex((unsigned char)ip[i] >> 4);
*s++=tohex((unsigned char)ip[i] & 15);
}
return 32;
}
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