strnstr
char *strnstr(const char *, const char *, size_t) __pure;
host = strnstr(buf, WHOIS_SERVER_ID, len);
strnstr(buf, WHOIS_ORG_SERVER_ID, len)) != NULL) {
if (strnstr(buf, ip_whois[i], len) !=
extern char *strnstr(const char *, const char *, size_t);