From 42b133748f67392116e98202b5e7b3285c803ea3 Mon Sep 17 00:00:00 2001
From: Stefan Metzmacher <metze@samba.org>
Date: Fri, 27 Apr 2007 05:45:53 +0000
Subject: r22528: remember that the connection was marked dead and don't allow
 sending packet over the broken connection, as we would segfault...

metze
(This used to be commit 738b2c74117bdbef3b314c37f01f2f73b7a80685)
---
 source4/librpc/rpc/dcerpc_smb.c  | 21 +++++++++++++++++++++
 source4/librpc/rpc/dcerpc_smb2.c | 20 ++++++++++++++++++++
 2 files changed, 41 insertions(+)

(limited to 'source4/librpc')

diff --git a/source4/librpc/rpc/dcerpc_smb.c b/source4/librpc/rpc/dcerpc_smb.c
index 5100eb60f2..3f35eae8f1 100644
--- a/source4/librpc/rpc/dcerpc_smb.c
+++ b/source4/librpc/rpc/dcerpc_smb.c
@@ -31,6 +31,7 @@ struct smb_private {
 	uint16_t fnum;
 	struct smbcli_tree *tree;
 	const char *server_name;
+	bool dead;
 };
 
 
@@ -39,6 +40,14 @@ struct smb_private {
 */
 static void pipe_dead(struct dcerpc_connection *c, NTSTATUS status)
 {
+	struct smb_private *smb = c->transport.private;
+
+	smb->dead = true;
+
+	if (smb->dead) {
+		return;
+	}
+
 	if (NT_STATUS_EQUAL(NT_STATUS_UNSUCCESSFUL, status)) {
 		status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
 	}
@@ -189,6 +198,12 @@ static NTSTATUS send_read_request_continue(struct dcerpc_connection *c, DATA_BLO
 */
 static NTSTATUS send_read_request(struct dcerpc_connection *c)
 {
+	struct smb_private *smb = c->transport.private;
+
+	if (smb->dead) {
+		return NT_STATUS_CONNECTION_DISCONNECTED;
+	}
+
 	return send_read_request_continue(c, NULL);
 }
 
@@ -302,6 +317,10 @@ static NTSTATUS smb_send_request(struct dcerpc_connection *c, DATA_BLOB *blob, B
 	union smb_write io;
 	struct smbcli_request *req;
 
+	if (smb->dead) {
+		return NT_STATUS_CONNECTION_DISCONNECTED;
+	}
+
 	if (trigger_read) {
 		return smb_send_trans_request(c, blob);
 	}
@@ -505,6 +524,8 @@ static void pipe_open_recv(struct smbcli_request *req)
 	smb->server_name= strupper_talloc(smb,
 			  state->tree->session->transport->called.name);
 	if (composite_nomem(smb->server_name, ctx)) return;
+	smb->dead	= false;
+
 	c->transport.private = smb;
 
 	composite_done(ctx);
diff --git a/source4/librpc/rpc/dcerpc_smb2.c b/source4/librpc/rpc/dcerpc_smb2.c
index 385cb00919..15605c21da 100644
--- a/source4/librpc/rpc/dcerpc_smb2.c
+++ b/source4/librpc/rpc/dcerpc_smb2.c
@@ -33,6 +33,7 @@ struct smb2_private {
 	struct smb2_handle handle;
 	struct smb2_tree *tree;
 	const char *server_name;
+	bool dead;
 };
 
 
@@ -41,6 +42,14 @@ struct smb2_private {
 */
 static void pipe_dead(struct dcerpc_connection *c, NTSTATUS status)
 {
+	struct smb2_private *smb = c->transport.private;
+
+	smb->dead = true;
+
+	if (smb->dead) {
+		return;
+	}
+
 	if (NT_STATUS_EQUAL(NT_STATUS_UNSUCCESSFUL, status)) {
 		status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
 	}
@@ -183,6 +192,12 @@ static NTSTATUS send_read_request_continue(struct dcerpc_connection *c, DATA_BLO
 */
 static NTSTATUS send_read_request(struct dcerpc_connection *c)
 {
+	struct smb2_private *smb = c->transport.private;
+
+	if (smb->dead) {
+		return NT_STATUS_CONNECTION_DISCONNECTED;
+	}
+
 	return send_read_request_continue(c, NULL);
 }
 
@@ -287,6 +302,10 @@ static NTSTATUS smb2_send_request(struct dcerpc_connection *c, DATA_BLOB *blob,
 	struct smb2_write io;
 	struct smb2_request *req;
 
+	if (smb->dead) {
+		return NT_STATUS_CONNECTION_DISCONNECTED;
+	}
+
 	if (trigger_read) {
 		return smb2_send_trans_request(c, blob);
 	}
@@ -461,6 +480,7 @@ static void pipe_open_recv(struct smb2_request *req)
 	smb->server_name= strupper_talloc(smb, 
 					  tree->session->transport->socket->hostname);
 	if (composite_nomem(smb->server_name, ctx)) return;
+	smb->dead	= false;
 
 	c->transport.private = smb;
 
-- 
cgit