dns_name_packet - extract names from DNS answer packet

       dns_name_packet  is  a low-level component of dns_name4, designed to support asynchronous DNS lookups. It
       reads a DNS packet of length len from buf, extracts the first PTR record from the answer section  of  the
       packet, puts the result into out, and returns 0 or -1 the same way as dns_name4.

       dns_name_packet - extract names from DNS answer packet

dns_name4(3), dns_name6(3), dns_ip4_packet(3)

                                                                                              dns_name_packet(3)

#include<libowfat/dns.h>

       int dns_name_packet(stralloc* out,const char* buf,
                           unsigned int len);