example of cdpi_dns

example_cdpi_dns

#include "cdpi_dns.hpp"

#include <iostream>

using namespace std;

void
decode_a(char *buf, int len) {
    cdpi_dns dns_decoder;

    if (dns_decoder.decode(buf, len)) {
        // print questions
        const std::list<cdpi_dns_question> &que = dns_decoder.get_question();
        std::list<cdpi_dns_question>::const_iterator it_que;

        for (it_que = que.begin(); it_que != que.end(); ++it_que) {
            cout << it_que->m_qname
                 << ", type = " << ntohs(it_que->m_qtype)
                 << ", class = " << ntohs(it_que->m_qclass)
                 << endl;
        }

        // print answers of A record
        const std::list<cdpi_dns_rr> &answer = dns_decoder.get_answer();
        std::list<cdpi_dns_rr>::const_iterator it_ans;

        for (it_ans = answer.begin(); it_ans != answer.end(); ++it_ans) {
            if (ntohs(it_ans->m_type)  == DNS_TYPE_A &&
                ntohs(it_ans->m_class) == DNS_CLASS_IN) {

                ptr_cdpi_dns_a p_a = DNS_RDATA_TO_A(it_ans->m_rdata);

                cout << p_a->m_a << endl;
            }
        }
    }
}