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Commit 8db4dc46 authored by Gustavo Padovan's avatar Gustavo Padovan Committed by Marcel Holtmann
Browse files

Bluetooth: Use macros for L2CAP channel identifiers 



Use macros instead of hardcoded numbers to make the L2CAP source code
more readable.

Signed-off-by: default avatarGustavo F. Padovan <gustavo@las.ic.unicamp.br>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent a1c1db39

include/net/bluetooth/l2cap.h

+6 −0
Original line number Diff line number Diff line
@@ -106,6 +106,12 @@ struct l2cap_conn_rsp { 
	__le16     status;

} __attribute__ ((packed));



/* channel indentifier */

#define L2CAP_CID_SIGNALING	0x0001

#define L2CAP_CID_CONN_LESS	0x0002

#define L2CAP_CID_DYN_START	0x0040

#define L2CAP_CID_DYN_END	0xffff



/* connect result */

#define L2CAP_CR_SUCCESS    0x0000

#define L2CAP_CR_PEND       0x0001

net/bluetooth/l2cap.c

+9 −9
Original line number Diff line number Diff line
@@ -161,9 +161,9 @@ static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 


static u16 l2cap_alloc_cid(struct l2cap_chan_list *l)

{

	u16 cid = 0x0040;

	u16 cid = L2CAP_CID_DYN_START;



	for (; cid < 0xffff; cid++) {

	for (; cid < L2CAP_CID_DYN_END; cid++) {

		if(!__l2cap_get_chan_by_scid(l, cid))

			return cid;

	}
@@ -215,13 +215,13 @@ static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct so 
		l2cap_pi(sk)->scid = l2cap_alloc_cid(l);

	} else if (sk->sk_type == SOCK_DGRAM) {

		/* Connectionless socket */

		l2cap_pi(sk)->scid = 0x0002;

		l2cap_pi(sk)->dcid = 0x0002;

		l2cap_pi(sk)->scid = L2CAP_CID_CONN_LESS;

		l2cap_pi(sk)->dcid = L2CAP_CID_CONN_LESS;

		l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU;

	} else {

		/* Raw socket can send/recv signalling messages only */

		l2cap_pi(sk)->scid = 0x0001;

		l2cap_pi(sk)->dcid = 0x0001;

		l2cap_pi(sk)->scid = L2CAP_CID_SIGNALING;

		l2cap_pi(sk)->dcid = L2CAP_CID_SIGNALING;

		l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU;

	}
@@ -1598,7 +1598,7 @@ static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, 


	lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE);

	lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen);

	lh->cid = cpu_to_le16(0x0001);

	lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING);



	cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE);

	cmd->code  = code;
@@ -2420,11 +2420,11 @@ static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) 
	BT_DBG("len %d, cid 0x%4.4x", len, cid);



	switch (cid) {

	case 0x0001:

	case L2CAP_CID_SIGNALING:

		l2cap_sig_channel(conn, skb);

		break;



	case 0x0002:

	case L2CAP_CID_CONN_LESS:

		psm = get_unaligned((__le16 *) skb->data);

		skb_pull(skb, 2);

		l2cap_conless_channel(conn, psm, skb);