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Bluetooth: Handle psm == 0 case inside l2cap_add_psm()

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When the user doesn't specify a psm we have the choose one for the
channel. Now we do this inside l2cap_add_psm().

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
This commit is contained in:
Gustavo F. Padovan 2011-04-18 19:36:44 -03:00
parent 9e4425fff9
commit 73b2ec1853
3 changed files with 24 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/net/bluetooth/l2cap.h
View File

@ -458,7 +458,6 @@ void l2cap_do_send(struct l2cap_chan *chan, struct sk_buff *skb);
void l2cap_streaming_send(struct l2cap_chan *chan); void l2cap_streaming_send(struct l2cap_chan *chan);
int l2cap_ertm_send(struct l2cap_chan *chan); int l2cap_ertm_send(struct l2cap_chan *chan);
struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src);
int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm); int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm);
int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid); int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid);

32
net/bluetooth/l2cap_core.c
View File

@ -135,7 +135,7 @@ static inline struct l2cap_chan *l2cap_get_chan_by_ident(struct l2cap_conn *conn
return c; return c;
} }
struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src) static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src)
{ {
struct sock *sk; struct sock *sk;
struct hlist_node *node; struct hlist_node *node;
@ -153,19 +153,35 @@ found:
int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm) int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm)
{ {
int err;
write_lock_bh(&l2cap_sk_list.lock); write_lock_bh(&l2cap_sk_list.lock);
if (__l2cap_get_sock_by_addr(psm, src)) { if (psm && __l2cap_get_sock_by_addr(psm, src)) {
write_unlock_bh(&l2cap_sk_list.lock); err = -EADDRINUSE;
return -EADDRINUSE; goto done;
} }
chan->psm = psm; if (psm) {
chan->sport = psm; chan->psm = psm;
chan->sport = psm;
err = 0;
} else {
u16 p;
err = -EINVAL;
for (p = 0x1001; p < 0x1100; p += 2)
if (!__l2cap_get_sock_by_addr(cpu_to_le16(p), src)) {
chan->psm = cpu_to_le16(p);
chan->sport = cpu_to_le16(p);
err = 0;
break;
}
}
done:
write_unlock_bh(&l2cap_sk_list.lock); write_unlock_bh(&l2cap_sk_list.lock);
return err;
return 0;
} }
int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid) int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid)

22
net/bluetooth/l2cap_sock.c
View File

@ -256,28 +256,6 @@ static int l2cap_sock_listen(struct socket *sock, int backlog)
goto done; goto done;
} }
if (!chan->psm && !chan->scid) {
bdaddr_t *src = &bt_sk(sk)->src;
u16 psm;
err = -EINVAL;
write_lock_bh(&l2cap_sk_list.lock);
for (psm = 0x1001; psm < 0x1100; psm += 2)
if (!__l2cap_get_sock_by_addr(cpu_to_le16(psm), src)) {
chan->psm = cpu_to_le16(psm);
chan->sport = cpu_to_le16(psm);
err = 0;
break;
}
write_unlock_bh(&l2cap_sk_list.lock);
if (err < 0)
goto done;
}
sk->sk_max_ack_backlog = backlog; sk->sk_max_ack_backlog = backlog;
sk->sk_ack_backlog = 0; sk->sk_ack_backlog = 0;
sk->sk_state = BT_LISTEN; sk->sk_state = BT_LISTEN;