1#include <resolv.h>
2#include <string.h>
3
4int res_querydomain(const char* name, const char* domain, int class, int type, unsigned char* dest,
5                    int len) {
6    char tmp[255];
7    size_t nl = strnlen(name, 255);
8    size_t dl = strnlen(domain, 255);
9    if (nl + dl + 1 > 254)
10        return -1;
11    memcpy(tmp, name, nl);
12    tmp[nl] = '.';
13    memcpy(tmp + nl + 1, domain, dl + 1);
14    return res_query(tmp, class, type, dest, len);
15}
16