Check also whether the interfaces is matched when pipex check PPPoE

packets.  This fixes the problem when pipex connects with pppoe(4)
through pair(4).

diff --git a/sys/net/pipex.c b/sys/net/pipex.c
index ba7840c..ecc599b 100644 (file)
--- a/sys/net/pipex.c
+++ b/sys/net/pipex.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: pipex.c,v 1.98 2017/05/28 18:42:00 yasuoka Exp $      */
+/*     $OpenBSD: pipex.c,v 1.99 2017/05/28 18:55:25 yasuoka Exp $      */
 
 /*-
  * Copyright (c) 2009 Internet Initiative Japan Inc.
@@ -1296,6 +1296,8 @@ pipex_pppoe_lookup_session(struct mbuf *m0)
                PIPEX_DBG((NULL, LOG_DEBUG, "<%s> session not found (id=%d)",
                    __func__, pppoe.session_id));
 #endif
+       if (session && session->proto.pppoe.over_ifidx != m0->m_pkthdr.ph_ifidx)
+               session = NULL;
 
        return (session);
 }