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authorMarcel Holtmann <marcel@holtmann.org>2006-02-13 11:39:57 +0100
committerMarcel Holtmann <marcel@holtmann.org>2006-02-13 11:39:57 +0100
commit56f3a40a5e7586043260669cc794e56fa58339e1 (patch)
treea2a756d86f8ff9da8d5668d2dfbf51f5107c53ce /net
parente9bb4c9929a63b23dcc637fae312b36b038bdc61 (diff)
downloadop-kernel-dev-56f3a40a5e7586043260669cc794e56fa58339e1.zip
op-kernel-dev-56f3a40a5e7586043260669cc794e56fa58339e1.tar.gz
[Bluetooth] Reduce L2CAP MTU for RFCOMM connections
This patch reduces the default L2CAP MTU for all RFCOMM connections from 1024 to 1013 to improve the interoperability with some broken RFCOMM implementations. To make this more flexible the L2CAP MTU becomes also a module parameter and so it can changed at runtime. Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net')
-rw-r--r--net/bluetooth/rfcomm/core.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/net/bluetooth/rfcomm/core.c b/net/bluetooth/rfcomm/core.c
index 0d89d64..5b4253c 100644
--- a/net/bluetooth/rfcomm/core.c
+++ b/net/bluetooth/rfcomm/core.c
@@ -46,13 +46,15 @@
#include <net/bluetooth/l2cap.h>
#include <net/bluetooth/rfcomm.h>
-#define VERSION "1.6"
-
#ifndef CONFIG_BT_RFCOMM_DEBUG
#undef BT_DBG
#define BT_DBG(D...)
#endif
+#define VERSION "1.7"
+
+static unsigned int l2cap_mtu = RFCOMM_MAX_L2CAP_MTU;
+
static struct task_struct *rfcomm_thread;
static DECLARE_MUTEX(rfcomm_sem);
@@ -623,7 +625,7 @@ static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src, bdaddr_t *dst
/* Set L2CAP options */
sk = sock->sk;
lock_sock(sk);
- l2cap_pi(sk)->imtu = RFCOMM_MAX_L2CAP_MTU;
+ l2cap_pi(sk)->imtu = l2cap_mtu;
release_sock(sk);
s = rfcomm_session_add(sock, BT_BOUND);
@@ -1868,7 +1870,7 @@ static int rfcomm_add_listener(bdaddr_t *ba)
/* Set L2CAP options */
sk = sock->sk;
lock_sock(sk);
- l2cap_pi(sk)->imtu = RFCOMM_MAX_L2CAP_MTU;
+ l2cap_pi(sk)->imtu = l2cap_mtu;
release_sock(sk);
/* Start listening on the socket */
@@ -2070,6 +2072,9 @@ static void __exit rfcomm_exit(void)
module_init(rfcomm_init);
module_exit(rfcomm_exit);
+module_param(l2cap_mtu, uint, 0644);
+MODULE_PARM_DESC(l2cap_mtu, "Default MTU for the L2CAP connection");
+
MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann <marcel@holtmann.org>");
MODULE_DESCRIPTION("Bluetooth RFCOMM ver " VERSION);
MODULE_VERSION(VERSION);
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