Treat clean shutdown of an SSL connection same as the non-SSL case.

If the client closes an SSL connection, treat it the same as EOF on a
non-SSL connection. In particular, don't write a message in the log about
that.

Michael Paquier.

Discussion: https://www.postgresql.org/message-id/CAB7nPqSfyVV42Q2acFo%3DvrvF2gxoZAMJLAPq3S3KkjhZAYi7aw@mail.gmail.com

diff --git a/src/backend/libpq/be-secure.c b/src/backend/libpq/be-secure.c
index 8a435e28dfd28136d5bee7ec6edc55522dec2619..dc226f2fbca76b91383696d5bc8c92572b9d2eb8 100644 (file)
--- a/src/backend/libpq/be-secure.c
+++ b/src/backend/libpq/be-secure.c
@@ -298,11 +298,13 @@ rloop:
                ereport(COMMERROR,
                        (errcode(ERRCODE_PROTOCOL_VIOLATION),
                         errmsg("SSL error: %s", SSLerrmessage(ecode))));
-               /* fall through */
-           case SSL_ERROR_ZERO_RETURN:
                errno = ECONNRESET;
                n = -1;
                break;
+           case SSL_ERROR_ZERO_RETURN:
+               /* connection was cleanly shut down by peer */
+               n = 0;
+               break;
            default:
                ereport(COMMERROR,
                        (errcode(ERRCODE_PROTOCOL_VIOLATION),
@@ -423,8 +425,14 @@ wloop:
                ereport(COMMERROR,
                        (errcode(ERRCODE_PROTOCOL_VIOLATION),
                         errmsg("SSL error: %s", SSLerrmessage(ecode))));
-               /* fall through */
+               errno = ECONNRESET;
+               n = -1;
+               break;
            case SSL_ERROR_ZERO_RETURN:
+               /*
+                * the SSL connnection was closed, leave it to the caller
+                * to ereport it
+                */
                errno = ECONNRESET;
                n = -1;
                break;