mg_dns_send_reply.md

---
title: "mg_dns_send_reply()"
decl_name: "mg_dns_send_reply"
symbol_kind: "func"
signature: |
  void mg_dns_send_reply(struct mg_connection *nc, struct mg_dns_reply *r);
---

Send a DNS reply through a connection.

The DNS data is stored in an IO buffer pointed by reply structure in `r`.
This function mutates the content of that buffer in order to ensure that
the DNS header reflects size and flags of the mssage, that might have been
updated either with `mg_dns_reply_record` or by direct manipulation of
`r->message`.

Once sent, the IO buffer will be trimmed unless the reply IO buffer
is the connection's send buffer and the connection is not in UDP mode.