From mboxrd@z Thu Jan 1 00:00:00 1970 From: Martin Schiller Subject: [PATCH 3/3] net/x25: handle call collisions Date: Tue, 27 Nov 2018 09:50:29 +0100 Message-ID: <20181127085029.9589-3-ms@dev.tdt.de> References: <20181127085029.9589-1-ms@dev.tdt.de> Return-path: In-Reply-To: <20181127085029.9589-1-ms@dev.tdt.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: andrew.hendry@gmail.com, davem@davemloft.net Cc: stephen@networkplumber.org, joe@perches.com, anto.cardace@gmail.com, linux-x25@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Martin Schiller If a session in X25_STATE_1 (Awaiting Call Accept) receives a call request, the session will be closed (x25_disconnect), cause=0x01 (Number Busy) and diag=0x48 (Call Collision) will be set and a clear request will be send. Signed-off-by: Martin Schiller --- net/x25/x25_in.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/net/x25/x25_in.c b/net/x25/x25_in.c index 3c12cae32001..afb26221d8a8 100644 --- a/net/x25/x25_in.c +++ b/net/x25/x25_in.c @@ -142,6 +142,15 @@ static int x25_state1_machine(struct sock *sk, struct sk_buff *skb, int frametyp sk->sk_state_change(sk); break; } + case X25_CALL_REQUEST: + /* call collision */ + x25->causediag.cause = 0x01; + x25->causediag.diagnostic = 0x48; + + x25_write_internal(sk, X25_CLEAR_REQUEST); + x25_disconnect(sk, EISCONN, 0x01, 0x48); + break; + case X25_CLEAR_REQUEST: if (!pskb_may_pull(skb, X25_STD_MIN_LEN + 2)) goto out_clear; -- 2.11.0