From 0da2bd7f62090cf64d3d0a698b68568eef4c3a27 Mon Sep 17 00:00:00 2001
From: Simon Goldschmidt <goldsimon@gmx.de>
Date: Mon, 17 Oct 2011 19:38:47 +0200
Subject: [PATCH] fixed bug #34569: shutdown(SHUT_WR) crashes netconn/socket
 api

---
 CHANGELOG         |  3 +++
 src/api/api_msg.c | 12 ++++++------
 2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/CHANGELOG b/CHANGELOG
index f8763aaf..efb8aee2 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -49,6 +49,9 @@ HISTORY
 
  ++ Bugfixes:
 
+  2011-10-17: Simon Goldschmidt
+  * api_msg.c: fixed bug #34569: shutdown(SHUT_WR) crashes netconn/socket api
+
   2011-10-13: Simon Goldschmidt
   * tcp_in.c, tcp_out.c: fixed bug #34517 (persist timer is started although no
     zero window is received) by starting the persist timer when a zero window is
diff --git a/src/api/api_msg.c b/src/api/api_msg.c
index 7104054d..88afb8f8 100644
--- a/src/api/api_msg.c
+++ b/src/api/api_msg.c
@@ -774,21 +774,21 @@ do_close_internal(struct netconn *conn)
     }
   }
   /* Try to close the connection */
-  if (shut == NETCONN_SHUT_RDWR) {
+  if (close) {
     err = tcp_close(conn->pcb.tcp);
   } else {
-    err = tcp_shutdown(conn->pcb.tcp, shut & NETCONN_SHUT_RD, shut & NETCONN_SHUT_WR);
+    err = tcp_shutdown(conn->pcb.tcp, shut_rx, shut_tx);
   }
   if (err == ERR_OK) {
     /* Closing succeeded */
     conn->current_msg->err = ERR_OK;
     conn->current_msg = NULL;
     conn->state = NETCONN_NONE;
-    /* Set back some callback pointers as conn is going away */
-    conn->pcb.tcp = NULL;
-    /* Trigger select() in socket layer. Make sure everybody notices activity
-       on the connection, error first! */
     if (close) {
+      /* Set back some callback pointers as conn is going away */
+      conn->pcb.tcp = NULL;
+      /* Trigger select() in socket layer. Make sure everybody notices activity
+       on the connection, error first! */
       API_EVENT(conn, NETCONN_EVT_ERROR, 0);
     }
     if (shut_rx) {