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#include "dns.h"
#include "dd.h"
int dd(const char *q,const char *base,char ip[4])
{
int j;
unsigned int x;
for (j = 0;;++j) {
if (dns_domain_equal(q,base)) return j;
if (j >= 4) return -1;
if (*q <= 0) return -1;
if (*q >= 4) return -1;
if ((q[1] < '0') || (q[1] > '9')) return -1;
x = q[1] - '0';
if (*q == 1) {
ip[j] = x;
q += 2;
continue;
}
if (!x) return -1;
if ((q[2] < '0') || (q[2] > '9')) return -1;
x = x * 10 + (q[2] - '0');
if (*q == 2) {
ip[j] = x;
q += 3;
continue;
}
if ((q[3] < '0') || (q[3] > '9')) return -1;
x = x * 10 + (q[3] - '0');
if (x > 255) return -1;
ip[j] = x;
q += 4;
}
}
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