From: Maxim Dounin <mdounin@mdounin.ru>
Date: Tue, 8 Nov 2022 09:48:19 +0000 (+0300)
Subject: Added logging to PROXY protocol write buffer check.
X-Git-Tag: release-1.23.3~13
X-Git-Url: http://git.kaiwu.me/postgresql/log/contrib/postgres_fdw/static/gitweb.js?a=commitdiff_plain;h=fbe42d46312a87ee24f9038f26876a95c7abab34;p=nginx.git

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
index 212763647..8d3bd01d9 100644
--- a/src/core/ngx_proxy_protocol.c
+++ b/src/core/ngx_proxy_protocol.c
@@ -282,6 +282,8 @@ ngx_proxy_protocol_write(ngx_connection_t *c, u_char *buf, u_char *last)
     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;
     }