diff options
Diffstat (limited to 'ip6_fmt.c')
-rw-r--r-- | ip6_fmt.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/ip6_fmt.c b/ip6_fmt.c new file mode 100644 index 0000000..ce2115a --- /dev/null +++ b/ip6_fmt.c @@ -0,0 +1,60 @@ +#include "fmt.h" +#include "byte.h" +#include "ip4.h" +#include "ip6.h" +#include <stdio.h> + +extern char tohex(char num); + +unsigned int ip6_fmt(char *s,const char ip[16]) +{ + unsigned int len; + unsigned int i; + unsigned int temp; + unsigned int compressing; + unsigned int compressed; + int j; + + len = 0; compressing = 0; compressed = 0; + for (j=0; j<16; j+=2) { + if (j==12 && ip6_isv4mapped(ip)) { + temp=ip4_fmt(s,ip+12); + len+=temp; + break; + } + temp = ((unsigned long) (unsigned char) ip[j] << 8) + + (unsigned long) (unsigned char) ip[j+1]; + if (temp == 0 && !compressed) { + if (!compressing) { + compressing=1; + if (j==0) { + if (s) *s++=':'; ++len; + } + } + } else { + if (compressing) { + compressing=0; ++compressed; + if (s) *s++=':'; ++len; + } + i = fmt_xlong(s,temp); len += i; if (s) s += i; + if (j<14) { + if (s) *s++ = ':'; + ++len; + } + } + } + if (compressing) { *s++=':'; ++len; } + +/* if (s) *s=0; */ + return len; +} + +unsigned int ip6_fmt_flat(char *s,const 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; +} |