mongoose/docs/c-api/dns-server.h/mg_dns_create_reply.md

title	decl_name	symbol_kind	signature
mg_dns_create_reply()	mg_dns_create_reply	func	struct mg_dns_reply mg_dns_create_reply(struct mbuf *io, struct mg_dns_message *msg);

Create a DNS reply.

The reply will be based on an existing query message msg. The query body will be appended to the output buffer. "reply + recursion allowed" will be added to the message flags and message's num_answers will be set to 0.

Answer records can be appended with mg_dns_send_reply or by lower level function defined in the DNS API.

In order to send the reply use mg_dns_send_reply. It's possible to use a connection's send buffer as reply buffers, and it will work for both UDP and TCP connections.

Example:

reply = mg_dns_create_reply(&nc->send_mbuf, msg);
for (i = 0; i < msg->num_questions; i++) {
  rr = &msg->questions[i];
  if (rr->rtype == MG_DNS_A_RECORD) {
    mg_dns_reply_record(&reply, rr, 3600, &dummy_ip_addr, 4);
  }
}
mg_dns_send_reply(nc, &reply);