diff options
| author | Samuel Ortiz <sameo@linux.intel.com> | 2012-05-07 12:31:19 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-05-15 17:28:01 -0400 |
| commit | ff353d86a92ee709e18fa485423dbaa7a52af8f3 (patch) | |
| tree | 15e7400909f0d314b622135c4e447d0e687950a0 /net/nfc/llcp/sock.c | |
| parent | 0f909361062d42b0ff7c6522e2347b56a0bf43cc (diff) | |
| download | linux-ff353d86a92ee709e18fa485423dbaa7a52af8f3.tar.gz linux-ff353d86a92ee709e18fa485423dbaa7a52af8f3.tar.xz linux-ff353d86a92ee709e18fa485423dbaa7a52af8f3.zip | |
NFC: LLCP connect must wait for a CC frame
Blocking sockets should sleep on a CC (Connection Complete) reception
from the connect() call.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/nfc/llcp/sock.c')
| -rw-r--r-- | net/nfc/llcp/sock.c | 42 |
1 files changed, 41 insertions, 1 deletions
diff --git a/net/nfc/llcp/sock.c b/net/nfc/llcp/sock.c index c13e02ebdef9..99196d3b84eb 100644 --- a/net/nfc/llcp/sock.c +++ b/net/nfc/llcp/sock.c @@ -27,6 +27,42 @@ #include "../nfc.h" #include "llcp.h" +static int sock_wait_state(struct sock *sk, int state, unsigned long timeo) +{ + DECLARE_WAITQUEUE(wait, current); + int err = 0; + + pr_debug("sk %p", sk); + + add_wait_queue(sk_sleep(sk), &wait); + set_current_state(TASK_INTERRUPTIBLE); + + while (sk->sk_state != state) { + if (!timeo) { + err = -EINPROGRESS; + break; + } + + if (signal_pending(current)) { + err = sock_intr_errno(timeo); + break; + } + + release_sock(sk); + timeo = schedule_timeout(timeo); + lock_sock(sk); + set_current_state(TASK_INTERRUPTIBLE); + + err = sock_error(sk); + if (err) + break; + } + + __set_current_state(TASK_RUNNING); + remove_wait_queue(sk_sleep(sk), &wait); + return err; +} + static struct proto llcp_sock_proto = { .name = "NFC_LLCP", .owner = THIS_MODULE, @@ -462,9 +498,13 @@ static int llcp_sock_connect(struct socket *sock, struct sockaddr *_addr, if (ret) goto put_dev; - sk->sk_state = LLCP_CONNECTED; + ret = sock_wait_state(sk, LLCP_CONNECTED, + sock_sndtimeo(sk, flags & O_NONBLOCK)); + if (ret) + goto put_dev; release_sock(sk); + return 0; put_dev: |