[PATCH 3/3] net/x25: handle call collisions
From: Martin Schiller <ms@dev.tdt.de>
Date: 2018-11-27 08:51:02
Also in:
lkml
Subsystem:
networking [general], the rest, x.25 stack · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, 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 <ms@dev.tdt.de> --- 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