[PATCH BlueZ v1] l2test: Attempt to use BT_SNDMTU if output MTU has been set

[Luiz Augusto von Dentz <luiz.dentz@gmail.com>]

From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

With the suggested fixes for L2CAP/ECFC/BV-27-C the kernel shall be
able to accept setsockopt(BT_SNDMTU) in order for an applications
to require a minimal output MTU greater than 64.

Fixes: https://github.com/bluez/bluez/issues/1895
---
 tools/l2test.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tools/l2test.c b/tools/l2test.c
index 7eecf1364492..b085c8d05453 100644
--- a/tools/l2test.c
+++ b/tools/l2test.c
@@ -318,6 +318,12 @@ static int setopts(int sk, struct l2cap_options *opts)
 		}
 	}
 
+	/* Older kernel versions may not support BT_SNDMTU so don't check its
+	 * return.
+	 */
+	setsockopt(sk, SOL_BLUETOOTH, BT_SNDMTU, &opts->omtu,
+				sizeof(opts->omtu));
+
 	return setsockopt(sk, SOL_BLUETOOTH, BT_RCVMTU, &opts->imtu,
 							sizeof(opts->imtu));
 }
-- 
2.52.0