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#include "byte.h"
#include "fmt.h"
#include "ip.h"
#include "dnsresolv.h"
/**
* @file dns_nd.c
* @authors djb, fefe
* @ref 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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