C

DNS Query CAA Records

See more DNS Examples

Shows how to perform a DNS query to retrieve CAA 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;
    int flags;
    const char *tag;
    const char *value;
    int i;
    int count_i;

    success = FALSE;

    dns = CkDns_Create();

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

    success = CkDns_Query(dns,"CAA","zoom.us",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": {
    //     "caa": [
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "iodef",
    //         "value": "mailto:security@zoom.us"
    //       },
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "issue",
    //         "value": "amazon.com"
    //       },
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "issue",
    //         "value": "digicert.com"
    //       },
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "issue",
    //         "value": "godaddy.com"
    //       },
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "issue",
    //         "value": "letsencrypt.org"
    //       },
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "issue",
    //         "value": "pki.goog"
    //       },
    //       {
    //         "name": "zoom.us",
    //         "ttl": 300,
    //         "flags": 0,
    //         "tag": "issue",
    //         "value": "sectigo.com"
    //       }
    //     ]
    //   }
    // }

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

    i = 0;
    count_i = CkJsonObject_SizeOfArray(json,"answer.caa");
    while (i < count_i) {
        CkJsonObject_putI(json,i);
        name = CkJsonObject_stringOf(json,"answer.caa[i].name");
        ttl = CkJsonObject_IntOf(json,"answer.caa[i].ttl");
        flags = CkJsonObject_IntOf(json,"answer.caa[i].flags");
        tag = CkJsonObject_stringOf(json,"answer.caa[i].tag");
        value = CkJsonObject_stringOf(json,"answer.caa[i].value");
        i = i + 1;
    }



    CkDns_Dispose(dns);
    CkJsonObject_Dispose(json);

    }