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49 lines
962 B
C
49 lines
962 B
C
#include "fmt.h"
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#include "byte.h"
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#include "ip4.h"
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#include "ip6.h"
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unsigned int fmt_ip6(char *s,const char ip[16])
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{
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unsigned int len;
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unsigned int i;
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unsigned int temp;
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unsigned int compressing;
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unsigned int compressed;
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int j;
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len = 0; compressing = 0; compressed = 0;
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for (j=0; j<16; j+=2) {
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if (j==12 && ip6_isv4mapped(ip)) {
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temp=ip4_fmt(s,ip+12);
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len+=temp;
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break;
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}
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temp = ((unsigned long) (unsigned char) ip[j] << 8) +
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(unsigned long) (unsigned char) ip[j+1];
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if (temp == 0 && !compressed) {
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if (!compressing) {
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compressing=1;
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if (j==0) {
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if (s) *s++=':'; ++len;
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}
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}
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} else {
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if (compressing) {
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compressing=0; ++compressed;
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if (s) *s++=':'; ++len;
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}
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i = fmt_xlong(s,temp); len += i; if (s) s += i;
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if (j<14) {
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if (s) *s++ = ':';
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++len;
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}
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}
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}
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if (compressing) { if (s) *s++=':'; ++len; }
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/* if (s) *s=0; */
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return len;
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}
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