From: Benjamin Cama <benoar@dolka.fr>
Date: Tue, 19 Jul 2011 22:29:02 +0000 (+0200)
Subject: Disable IPv6 routes adv when peer doesn't support it.
X-Git-Tag: debian/2.2.1-1fdn1~1^2^2~16
X-Git-Url: http://git.sameswireless.fr/l2tpns.git/commitdiff_plain/78a7085778868f1bc0e5e5542b7e208f943e3778?ds=inline

Disable IPv6 routes adv when peer doesn't support it.

Signed-off-by: Benjamin Cama <benoar@dolka.fr>
---

diff --git a/bgp.c b/bgp.c
index 2deeeb3..ea15faf 100644
--- a/bgp.c
+++ b/bgp.c
@@ -1093,6 +1093,17 @@ static int bgp_handle_input(struct bgp_peer *peer)
 		return 0;
 	    }
 
+	    if (notification->error_code == BGP_ERR_OPEN
+		    && notification->subcode == BGP_ERR_OPN_UNSUP_CAP)
+	    {
+		/* the only capability we advertise is this one, so upon receiving
+		   an "unsupported capability" message, we disable IPv6 routes for
+		   this peer */
+		LOG(4, 0, 0, "BGP peer %s doesn't support IPv6 routes advertisement\n", peer->name);
+		peer->handle_ipv6_routes = 0;
+		break;
+	    }
+
 	    /* FIXME: should handle more notifications */
 	    LOG(4, 0, 0, "BGP peer %s sent unhandled NOTIFICATION %d\n",
 		peer->name, (int) notification->error_code);