linux-kernel - Re: [PATCH] bluetooth: create macros for channels identifiers

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Message-ID: <6b53b1990903062107q24b6c8a1w58325ee18a216653@mail.gmail.com>
Date:	Sat, 7 Mar 2009 02:07:31 -0300
From:	"Gustavo F. Padovan" <gustavo@....ic.unicamp.br>
To:	linux-bluetooth@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] bluetooth: create macros for channels identifiers

What about that?

On Sat, Feb 28, 2009 at 7:04 PM, Gustavo F. Padovan
<gustavo@....ic.unicamp.br> wrote:
> Use macros instead of hardcoded numbers to get a code more readable.
>
> Signed-off-by: Gustavo F. Padovan <gustavo@....ic.unicamp.br>
> ---
>  include/net/bluetooth/l2cap.h |    6 ++++++
>  net/bluetooth/l2cap.c         |   18 +++++++++---------
>  2 files changed, 15 insertions(+), 9 deletions(-)
>
> diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h
> index f566aa1..ed4ba91 100644
> --- a/include/net/bluetooth/l2cap.h
> +++ b/include/net/bluetooth/l2cap.h
> @@ -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
> diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
> index ca4d3b4..ff1744e 100644
> --- a/net/bluetooth/l2cap.c
> +++ b/net/bluetooth/l2cap.c
> @@ -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);
> --
> 1.6.0.6
>
> --
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>



-- 
Gustavo F. Padovan

Computer Engineering Student
Institute of Computing - IC
University of Campinas - UNICAMP

email: gustavo@....ic.unicamp.br
gtalk: gfpadovan@...il.com
mobile: +55 19 81030803
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