From 29943bfef195fa6a2d033c6f8bd674677430a3ae Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Sat, 27 Sep 2025 12:48:09 -0500
Subject: [PATCH] preen

---
 esphome/components/captive_portal/dns_server_esp32_idf.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/esphome/components/captive_portal/dns_server_esp32_idf.h b/esphome/components/captive_portal/dns_server_esp32_idf.h
index cec039b332..9837eca1ae 100644
--- a/esphome/components/captive_portal/dns_server_esp32_idf.h
+++ b/esphome/components/captive_portal/dns_server_esp32_idf.h
@@ -15,11 +15,13 @@ class DNSServer {
   void process_next_request();
 
  protected:
+  static constexpr size_t DNS_BUFFER_SIZE = 256;
+
   void process_dns_request();
 
   std::unique_ptr<socket::Socket> socket_{nullptr};
   network::IPAddress server_ip_;
-  uint8_t buffer_[256];  // DNS_MAX_LEN
+  uint8_t buffer_[DNS_BUFFER_SIZE];
 };
 
 }  // namespace esphome::captive_portal