1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
Upstream status: Taken from master branch. Likely included in versions > 1.4.4
Fixes issues with OpenSSL3. See related thread:
https://sourceforge.net/p/isync/mailman/isync-devel/thread/Y2jnr8hESp1PUW+6@bulldog/
From b6c36624f04cd388873785c0631df3f2f9ac4bf0 Mon Sep 17 00:00:00 2001
From: Oswald Buddenhagen <ossi@users.sf.net>
Date: Mon, 6 Jun 2022 11:55:37 +0200
Subject: [PATCH] work around "unexpected EOF" error messages at end of SSL
connections
gmail apparently doesn't send a close notification (SSL_shutdown())
before closing the TCP socket.
---
src/drv_imap.c | 7 +++++--
src/socket.c | 9 +++++++++
src/socket.h | 1 +
3 files changed, 15 insertions(+), 2 deletions(-)
diff --git a/src/drv_imap.c b/src/drv_imap.c
index fb8d165..6286045 100644
--- a/src/drv_imap.c
+++ b/src/drv_imap.c
@@ -1620,6 +1620,7 @@ imap_socket_read( void *aux )
error( "IMAP error: unexpected BYE response: %s\n", cmd );
/* We just wait for the server to close the connection now. */
ctx->expectEOF = 1;
+ socket_expect_eof( &ctx->conn );
} else {
/* We still need to wait for the LOGOUT's tagged OK. */
}
@@ -1882,10 +1883,12 @@ static void
imap_cleanup_p2( imap_store_t *ctx,
imap_cmd_t *cmd ATTR_UNUSED, int response )
{
- if (response == RESP_NO)
+ if (response == RESP_NO) {
imap_cancel_store( &ctx->gen );
- else if (response == RESP_OK)
+ } else if (response == RESP_OK) {
ctx->expectEOF = 1;
+ socket_expect_eof( &ctx->conn );
+ }
}
/******************* imap_open_store *******************/
diff --git a/src/socket.c b/src/socket.c
index ac3c847..892cece 100644
--- a/src/socket.c
+++ b/src/socket.c
@@ -810,6 +810,15 @@ socket_expect_activity( conn_t *conn, int expect )
conf_wakeup( &conn->fd_timeout, expect ? conn->conf->timeout : -1 );
}
+void
+socket_expect_eof( conn_t *sock )
+{
+#ifdef SSL_OP_IGNORE_UNEXPECTED_EOF // implies HAVE_LIBSSL
+ if (sock->ssl)
+ SSL_set_options( sock->ssl, SSL_OP_IGNORE_UNEXPECTED_EOF );
+#endif
+}
+
int
socket_read( conn_t *conn, char *buf, uint len )
{
diff --git a/src/socket.h b/src/socket.h
index 5b1edd0..af679aa 100644
--- a/src/socket.h
+++ b/src/socket.h
@@ -142,6 +142,7 @@ void socket_start_tls(conn_t *conn, void (*cb)( int ok, void *aux ) );
void socket_start_deflate( conn_t *conn );
void socket_close( conn_t *sock );
void socket_expect_activity( conn_t *sock, int expect );
+void socket_expect_eof( conn_t *sock );
int socket_read( conn_t *sock, char *buf, uint len ); /* never waits */
char *socket_read_line( conn_t *sock ); /* don't free return value; never waits */
typedef enum { KeepOwn = 0, GiveOwn } ownership_t;
--
2.39.2
|
