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NFC: Handle LLCP Disconnected Mode frames 

When receiving such frame, the sockets waiting for a connection to finish
should be woken up. Connecting to an unbound LLCP service will trigger a
DM as a response.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Samuel Ortiz 2012-06-26 16:13:29 +02:00 committed by John W. Linville
parent 8f50020ed9
commit 5c0560b7a5
1 changed files with 44 additions and 0 deletions
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44
net/nfc/llcp/llcp.c
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@ -958,6 +958,45 @@ static void nfc_llcp_recv_cc(struct nfc_llcp_local *local, struct sk_buff *skb)
nfc_llcp_sock_put(llcp_sock);
}
static void nfc_llcp_recv_dm(struct nfc_llcp_local *local, struct sk_buff *skb)
{
struct nfc_llcp_sock *llcp_sock;
struct sock *sk;
u8 dsap, ssap, reason;
dsap = nfc_llcp_dsap(skb);
ssap = nfc_llcp_ssap(skb);
reason = skb->data[2];
pr_debug("%d %d reason %d\n", ssap, dsap, reason);
switch (reason) {
case LLCP_DM_NOBOUND:
case LLCP_DM_REJ:
llcp_sock = nfc_llcp_connecting_sock_get(local, dsap);
break;
default:
llcp_sock = nfc_llcp_sock_get(local, dsap, ssap);
break;
}
if (llcp_sock == NULL) {
pr_err("Invalid DM\n");
return;
}
sk = &llcp_sock->sk;
sk->sk_err = ENXIO;
sk->sk_state = LLCP_CLOSED;
sk->sk_state_change(sk);
nfc_llcp_sock_put(llcp_sock);
return;
}
static void nfc_llcp_rx_work(struct work_struct *work)
{
struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local,
@ -1001,6 +1040,11 @@ static void nfc_llcp_rx_work(struct work_struct *work)
nfc_llcp_recv_cc(local, skb);
break;
case LLCP_PDU_DM:
pr_debug("DM\n");
nfc_llcp_recv_dm(local, skb);
break;
case LLCP_PDU_I:
case LLCP_PDU_RR:
case LLCP_PDU_RNR: