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#include "byte.h"
#include "dnsresolv.h"
#include "fmt.h"
#include "ip.h"
/**
@file dns_nd.c
@autor djb, fefe
@source ucspi-tcp
@brief DNS domain name for ip (wire format)
*/
int dns_name4_domain(char name[DNS_NAME4_DOMAIN], const char ip[4])
{
unsigned int namelen;
unsigned int i;
namelen = 0;
i = fmt_ulong(name + namelen + 1, (unsigned long)(unsigned char)ip[3]);
name[namelen++] = i;
namelen += i;
i = fmt_ulong(name + namelen + 1, (unsigned long)(unsigned char)ip[2]);
name[namelen++] = i;
namelen += i;
i = fmt_ulong(name + namelen + 1, (unsigned long)(unsigned char)ip[1]);
name[namelen++] = i;
namelen += i;
i = fmt_ulong(name + namelen + 1, (unsigned long)(unsigned char)ip[0]);
name[namelen++] = i;
namelen += i;
byte_copy(name + namelen, 14, "\7in-addr\4arpa\0");
return namelen + 14;
}
int dns_name6_domain(char name[DNS_NAME6_DOMAIN], const char ip[16])
{
unsigned int j;
for (j = 0; j < 16; j++) {
name[j * 4] = 1;
name[j * 4 + 1] = tohex(ip[15 - j] & 15);
name[j * 4 + 2] = 1;
name[j * 4 + 3] = tohex((unsigned char)ip[15 - j] >> 4);
}
byte_copy(name + 4 * 16, 10, "\3ip6\4arpa\0");
return 4 * 16 + 10;
}
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