[Tarantool-patches] [PATCH v2] iproto: close socket explicitly before wal_dir at exit

[Ilya Kosarev <i.kosarev@tarantool.org>]

From: Ilya Kosarev <ilyanapar@yandex.ru>

tarantool instance didn't close socket explicitly
which could cause hot standby instance to fail to bind
in case it tries to bind before socket is closed by OS.
Now it is fixed by closing socket explicitly before wal_dir.

Closes #3967
---
https://github.com/tarantool/tarantool/tree/i.kosarev/gh-3967-close-socket-explicitly
https://github.com/tarantool/tarantool/issues/3967

 src/box/box.cc    |  1 +
 src/box/iproto.cc | 13 +++++++++++++
 src/box/iproto.h  |  3 +++
 3 files changed, 17 insertions(+)

diff --git a/src/box/box.cc b/src/box/box.cc
index e7ec2891c..73d94f79b 100644
--- a/src/box/box.cc
+++ b/src/box/box.cc
@@ -1666,6 +1666,7 @@ box_free(void)
 		tuple_free();
 		port_free();
 #endif
+		iproto_free();
 		replication_free();
 		sequence_free();
 		gc_free();
diff --git a/src/box/iproto.cc b/src/box/iproto.cc
index bea35ce87..b1d24910f 100644
--- a/src/box/iproto.cc
+++ b/src/box/iproto.cc
@@ -2080,3 +2080,16 @@ iproto_set_msg_max(int new_iproto_msg_max)
 	iproto_do_cfg(&cfg_msg);
 	cpipe_set_max_input(&net_pipe, new_iproto_msg_max / 2);
 }
+
+void
+iproto_free()
+{
+	tt_pthread_cancel(net_cord.id);
+	tt_pthread_join(net_cord.id, NULL);
+	/*
+	* Close socket descriptor to prevent hot standby instance
+	* failing to bind in case it tries to bind
+	* before socket is closed by OS.
+	*/
+	close(binary.ev.fd);
+}
diff --git a/src/box/iproto.h b/src/box/iproto.h
index b9a6cf8f7..8f3607ffc 100644
--- a/src/box/iproto.h
+++ b/src/box/iproto.h
@@ -80,6 +80,9 @@ iproto_listen(const char *uri);
 void
 iproto_set_msg_max(int iproto_msg_max);
 
+void
+iproto_free();
+
 #endif /* defined(__cplusplus) */
 
 #endif
-- 
2.17.1