From patchwork Mon Dec 7 15:12:12 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Antonio Quartulli X-Patchwork-Id: 553425 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id CFC15140291 for ; Tue, 8 Dec 2015 02:14:18 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964805AbbLGPOO (ORCPT ); Mon, 7 Dec 2015 10:14:14 -0500 Received: from s1.neomailbox.net ([5.148.176.57]:18373 "EHLO s1.neomailbox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933041AbbLGPOL (ORCPT ); Mon, 7 Dec 2015 10:14:11 -0500 From: Antonio Quartulli To: davem@davemloft.net Cc: netdev@vger.kernel.org, b.a.t.m.a.n@lists.open-mesh.org, Simon Wunderlich , Marek Lindner , Antonio Quartulli Subject: [PATCH 1/4] batman-adv: fix speedy join for DAT cache replies Date: Mon, 7 Dec 2015 23:12:12 +0800 Message-Id: <1449501135-30438-2-git-send-email-antonio@meshcoding.com> In-Reply-To: <1449501135-30438-1-git-send-email-antonio@meshcoding.com> References: <1449501135-30438-1-git-send-email-antonio@meshcoding.com> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Simon Wunderlich DAT Cache replies are answered on behalf of other clients which are not connected to the answering originator. Therefore, we shouldn't add these clients to the answering originators TT table through speed join to avoid bogus entries. Reported-by: Alessandro Bolletta Signed-off-by: Simon Wunderlich Acked-by: Antonio Quartulli Signed-off-by: Marek Lindner Signed-off-by: Antonio Quartulli --- net/batman-adv/routing.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c index 8d990b0..3207667 100644 --- a/net/batman-adv/routing.c +++ b/net/batman-adv/routing.c @@ -836,6 +836,7 @@ int batadv_recv_unicast_packet(struct sk_buff *skb, u8 *orig_addr; struct batadv_orig_node *orig_node = NULL; int check, hdr_size = sizeof(*unicast_packet); + enum batadv_subtype subtype; bool is4addr; unicast_packet = (struct batadv_unicast_packet *)skb->data; @@ -863,10 +864,20 @@ int batadv_recv_unicast_packet(struct sk_buff *skb, /* packet for me */ if (batadv_is_my_mac(bat_priv, unicast_packet->dest)) { if (is4addr) { - batadv_dat_inc_counter(bat_priv, - unicast_4addr_packet->subtype); - orig_addr = unicast_4addr_packet->src; - orig_node = batadv_orig_hash_find(bat_priv, orig_addr); + subtype = unicast_4addr_packet->subtype; + batadv_dat_inc_counter(bat_priv, subtype); + + /* Only payload data should be considered for speedy + * join. For example, DAT also uses unicast 4addr + * types, but those packets should not be considered + * for speedy join, since the clients do not actually + * reside at the sending originator. + */ + if (subtype == BATADV_P_DATA) { + orig_addr = unicast_4addr_packet->src; + orig_node = batadv_orig_hash_find(bat_priv, + orig_addr); + } } if (batadv_dat_snoop_incoming_arp_request(bat_priv, skb,