C

DNS Query SOA Records

See more DNS Examples

Shows how to perform a DNS query to retrieve SOA records.

Note: This example requires Chilkat v9.5.0.96 or later.

C

#include <C_CkDns.h>
#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkDns dns;
    HCkJsonObject json;
    const char *name;
    int ttl;
    const char *mname;
    const char *rname;
    int serial;
    int refresh;
    int retry;
    int expire;
    int minttl;
    int i;
    int count_i;

    success = FALSE;

    dns = CkDns_Create();

    json = CkJsonObject_Create();
    CkJsonObject_putEmitCompact(json,FALSE);

    success = CkDns_Query(dns,"SOA","x.com",json);
    if (success == FALSE) {
        printf("%s\n",CkDns_lastErrorText(dns));
        CkDns_Dispose(dns);
        CkJsonObject_Dispose(json);
        return;
    }

    printf("%s\n",CkJsonObject_emit(json));

    // Sample response.
    // Parsing code below..

    // {
    //   "answer": {
    //     "soa": [
    //       {
    //         "name": "x.com",
    //         "ttl": 1800,
    //         "mname": "alexia.ns.cloudflare.com",
    //         "rname": "dns.cloudflare.com",
    //         "serial": -1971124188,
    //         "refresh": 10000,
    //         "retry": 2400,
    //         "expire": 604800,
    //         "minttl": 1800
    //       }
    //     ]
    //   }
    // }

    // Use this online tool to generate parsing code from sample JSON: 
    // Generate Parsing Code from JSON

    i = 0;
    count_i = CkJsonObject_SizeOfArray(json,"answer.soa");
    while (i < count_i) {
        CkJsonObject_putI(json,i);
        name = CkJsonObject_stringOf(json,"answer.soa[i].name");
        ttl = CkJsonObject_IntOf(json,"answer.soa[i].ttl");
        mname = CkJsonObject_stringOf(json,"answer.soa[i].mname");
        rname = CkJsonObject_stringOf(json,"answer.soa[i].rname");
        serial = CkJsonObject_IntOf(json,"answer.soa[i].serial");
        refresh = CkJsonObject_IntOf(json,"answer.soa[i].refresh");
        retry = CkJsonObject_IntOf(json,"answer.soa[i].retry");
        expire = CkJsonObject_IntOf(json,"answer.soa[i].expire");
        minttl = CkJsonObject_IntOf(json,"answer.soa[i].minttl");
        i = i + 1;
    }



    CkDns_Dispose(dns);
    CkJsonObject_Dispose(json);

    }