# HG changeset patch
# User Maxim Dounin <mdounin@mdounin.ru>
# Date 1667891773 -10800
# Tue Nov 08 10:16:13 2022 +0300
# Node ID 22c65e5f1c372f251e2cefdd7aae743794ecfa9e
# Parent 17d6a537fb1bb587e4de22961bf5be5f0c648fa8
Added logging to PROXY protocol write buffer check.

The check is not expected to fail unless there is a bug in the calling
code. But given the check is here, it should log an alert if it fails
instead of silently closing the connection.

diff --git a/src/core/ngx_proxy_protocol.c b/src/core/ngx_proxy_protocol.c
--- a/src/core/ngx_proxy_protocol.c
+++ b/src/core/ngx_proxy_protocol.c
@@ -282,6 +282,8 @@ ngx_proxy_protocol_write(ngx_connection_
ngx_uint_t port, lport;

if (last - buf < NGX_PROXY_PROTOCOL_V1_MAX_HEADER) {
+ ngx_log_error(NGX_LOG_ALERT, c->log, 0,
+ "too small buffer for PROXY protocol");
return NULL;
}


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