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Commit 65c7c491 authored by Marcel Holtmann's avatar Marcel Holtmann
Browse files

Bluetooth: Add L2CAP RFC option if ERTM is enabled 



When trying to establish a connection with Enhanced Retransmission mode
enabled, the RFC option needs to be added to the configuration.

Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent c6b03cf9

net/bluetooth/l2cap.c

+20 −3
Original line number Diff line number Diff line
@@ -1743,12 +1743,29 @@ static int l2cap_build_conf_req(struct sock *sk, void *data) 
{

	struct l2cap_pinfo *pi = l2cap_pi(sk);

	struct l2cap_conf_req *req = data;

	struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC };

	void *ptr = req->data;



	BT_DBG("sk %p", sk);



	switch (pi->mode) {

	case L2CAP_MODE_BASIC:

		if (pi->imtu != L2CAP_DEFAULT_MTU)

			l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu);

		break;



	case L2CAP_MODE_ERTM:

		rfc.mode            = L2CAP_MODE_ERTM;

		rfc.txwin_size      = L2CAP_DEFAULT_RX_WINDOW;

		rfc.max_transmit    = L2CAP_DEFAULT_MAX_RECEIVE;

		rfc.retrans_timeout = cpu_to_le16(L2CAP_DEFAULT_RETRANS_TO);

		rfc.monitor_timeout = cpu_to_le16(L2CAP_DEFAULT_MONITOR_TO);

		rfc.max_pdu_size    = cpu_to_le16(L2CAP_DEFAULT_MAX_RX_APDU);



		l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,

					sizeof(rfc), (unsigned long) &rfc);

		break;

	}



	/* FIXME: Need actual value of the flush timeout */

	//if (flush_to != L2CAP_DEFAULT_FLUSH_TO)