1 #include <resolv.h>
2 #include <string.h>
3
res_querydomain(const char * name,const char * domain,int class,int type,unsigned char * dest,int len)4 int 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