From f671d1bc54d6db164cf4b03a9ef0e1ddcdd39c72 Mon Sep 17 00:00:00 2001
From: Igor Sysoev <igor@sysoev.ru>
Date: Tue, 23 Jun 2020 14:16:43 +0300
Subject: Decreased level of some socket close() errors.

---
 src/nxt_socket.c | 47 +++++++++++++++++++++++++++++++++++------------
 src/nxt_socket.h |  2 +-
 2 files changed, 36 insertions(+), 13 deletions(-)

diff --git a/src/nxt_socket.c b/src/nxt_socket.c
index cc3d7378..a8e0d514 100644
--- a/src/nxt_socket.c
+++ b/src/nxt_socket.c
@@ -50,18 +50,6 @@ nxt_socket_create(nxt_task_t *task, nxt_uint_t domain, nxt_uint_t type,
 }
 
 
-void
-nxt_socket_close(nxt_task_t *task, nxt_socket_t s)
-{
-    if (nxt_fast_path(close(s) == 0)) {
-        nxt_debug(task, "socket close(%d)", s);
-
-    } else {
-        nxt_alert(task, "socket close(%d) failed %E", s, nxt_socket_errno);
-    }
-}
-
-
 void
 nxt_socket_defer_accept(nxt_task_t *task, nxt_socket_t s, nxt_sockaddr_t *sa)
 {
@@ -291,6 +279,41 @@ nxt_socket_shutdown(nxt_task_t *task, nxt_socket_t s, nxt_uint_t how)
 }
 
 
+void
+nxt_socket_close(nxt_task_t *task, nxt_socket_t s)
+{
+    nxt_err_t   err;
+    nxt_uint_t  level;
+
+    if (nxt_fast_path(close(s) == 0)) {
+        nxt_debug(task, "socket close(%d)", s);
+        return;
+    }
+
+    err = nxt_socket_errno;
+
+    switch (err) {
+
+    case NXT_ENOTCONN:
+        level = NXT_LOG_DEBUG;
+        break;
+
+    case NXT_ECONNRESET:
+    case NXT_ENETDOWN:
+    case NXT_ENETUNREACH:
+    case NXT_EHOSTDOWN:
+    case NXT_EHOSTUNREACH:
+        level = NXT_LOG_ERR;
+        break;
+
+    default:
+        level = NXT_LOG_ALERT;
+    }
+
+    nxt_log(task, level, "socket close(%d) failed %E", s, err);
+}
+
+
 nxt_err_t
 nxt_socket_error(nxt_socket_t s)
 {
diff --git a/src/nxt_socket.h b/src/nxt_socket.h
index e39d8e4d..718ad398 100644
--- a/src/nxt_socket.h
+++ b/src/nxt_socket.h
@@ -93,7 +93,6 @@ typedef union {
 
 NXT_EXPORT nxt_socket_t nxt_socket_create(nxt_task_t *task, nxt_uint_t family,
     nxt_uint_t type, nxt_uint_t protocol, nxt_uint_t flags);
-NXT_EXPORT void nxt_socket_close(nxt_task_t *task, nxt_socket_t s);
 NXT_EXPORT void nxt_socket_defer_accept(nxt_task_t *task, nxt_socket_t s,
     nxt_sockaddr_t *sa);
 NXT_EXPORT nxt_int_t nxt_socket_getsockopt(nxt_task_t *task, nxt_socket_t s,
@@ -106,6 +105,7 @@ NXT_EXPORT nxt_int_t nxt_socket_connect(nxt_task_t *task, nxt_socket_t s,
     nxt_sockaddr_t *sa);
 NXT_EXPORT void nxt_socket_shutdown(nxt_task_t *task, nxt_socket_t s,
     nxt_uint_t how);
+NXT_EXPORT void nxt_socket_close(nxt_task_t *task, nxt_socket_t s);
 nxt_err_t nxt_socket_error(nxt_socket_t s);
 nxt_uint_t nxt_socket_error_level(nxt_err_t err);
 
-- 
cgit