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37 lines
1.0 KiB
Markdown
37 lines
1.0 KiB
Markdown
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---
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title: "mg_dns_create_reply()"
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decl_name: "mg_dns_create_reply"
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symbol_kind: "func"
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signature: |
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struct mg_dns_reply mg_dns_create_reply(struct mbuf *io,
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struct mg_dns_message *msg);
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---
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Create a DNS reply.
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The reply will be based on an existing query message `msg`.
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The query body will be appended to the output buffer.
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"reply + recursion allowed" will be added to the message flags and
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message's num_answers will be set to 0.
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Answer records can be appended with `mg_dns_send_reply` or by lower
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level function defined in the DNS API.
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In order to send the reply use `mg_dns_send_reply`.
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It's possible to use a connection's send buffer as reply buffers,
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and it will work for both UDP and TCP connections.
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Example:
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```c
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reply = mg_dns_create_reply(&nc->send_mbuf, msg);
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for (i = 0; i < msg->num_questions; i++) {
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rr = &msg->questions[i];
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if (rr->rtype == MG_DNS_A_RECORD) {
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mg_dns_reply_record(&reply, rr, 3600, &dummy_ip_addr, 4);
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}
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}
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mg_dns_send_reply(nc, &reply);
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```
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