Return-Path: From: Szymon Janc To: linux-bluetooth@vger.kernel.org Cc: Szymon Janc Subject: [PATCH 1/5] lib: Add flag to double L2CAP IMTU size used for SDP connection Date: Mon, 20 Jan 2014 01:31:50 +0100 Message-Id: <1390177914-13529-1-git-send-email-szymon.janc@gmail.com> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: This will allow to workaround Dualshock4 not respecting L2CAP MTU size while sending SDP response. --- lib/sdp.c | 22 ++++++++++++++++++++++ lib/sdp_lib.h | 1 + 2 files changed, 23 insertions(+) diff --git a/lib/sdp.c b/lib/sdp.c index 886e7cf..4d9a4bb 100644 --- a/lib/sdp.c +++ b/lib/sdp.c @@ -4644,6 +4644,25 @@ static int sdp_connect_local(sdp_session_t *session) return connect(session->sock, (struct sockaddr *) &sa, sizeof(sa)); } +static int double_l2cap_imtu(int sk) +{ + struct l2cap_options l2o; + socklen_t len; + + memset(&l2o, 0, sizeof(l2o)); + len = sizeof(l2o); + + if (getsockopt(sk, SOL_L2CAP, L2CAP_OPTIONS, &l2o, &len) < 0) + return -1; + + l2o.imtu = 2 * l2o.imtu; + + if (setsockopt(sk, SOL_L2CAP, L2CAP_OPTIONS, &l2o, sizeof(l2o)) < 0) + return -1; + + return 0; +} + static int sdp_connect_l2cap(const bdaddr_t *src, const bdaddr_t *dst, sdp_session_t *session) { @@ -4678,6 +4697,9 @@ static int sdp_connect_l2cap(const bdaddr_t *src, setsockopt(sk, SOL_SOCKET, SO_LINGER, &l, sizeof(l)); } + if ((flags & SDP_DOUBLE_IMTU) && double_l2cap_imtu(sk) < 0) + return -1; + sa.l2_psm = htobs(SDP_PSM); sa.l2_bdaddr = *dst; diff --git a/lib/sdp_lib.h b/lib/sdp_lib.h index 6e1eb91..56ba2ea 100644 --- a/lib/sdp_lib.h +++ b/lib/sdp_lib.h @@ -81,6 +81,7 @@ static inline void sdp_list_foreach(sdp_list_t *list, sdp_list_func_t f, void *u #define SDP_RETRY_IF_BUSY 0x01 #define SDP_WAIT_ON_CLOSE 0x02 #define SDP_NON_BLOCKING 0x04 +#define SDP_DOUBLE_IMTU 0x08 /* * a session with an SDP server -- 1.8.5.3