From patchwork Tue Nov 9 09:27:28 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sven Eckelmann X-Patchwork-Id: 523 Return-Path: Received: from mail.gmx.net (mailout-de.gmx.net [213.165.64.23]) by open-mesh.org (Postfix) with SMTP id ACC2D1544CD for ; Tue, 9 Nov 2010 10:25:25 +0100 (CET) Received: (qmail invoked by alias); 09 Nov 2010 09:25:23 -0000 Received: from unknown (EHLO sven-desktop.lazhur.ath.cx) [89.246.195.99] by mail.gmx.net (mp069) with SMTP; 09 Nov 2010 10:25:23 +0100 X-Authenticated: #15668376 X-Provags-ID: V01U2FsdGVkX1/KHRZrfifKbXzZB6x10rd+ZCdT+NgHiUAw5LuYjz fPvm50LfB/9HrN From: Sven Eckelmann To: b.a.t.m.a.n@lists.open-mesh.org Date: Tue, 9 Nov 2010 10:27:28 +0100 Message-Id: <1289294848-7434-1-git-send-email-sven.eckelmann@gmx.de> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1289260381-6415-2-git-send-email-sven.eckelmann@gmx.de> References: <1289260381-6415-2-git-send-email-sven.eckelmann@gmx.de> X-Y-GMX-Trusted: 0 Cc: Tobias Klauser Subject: [B.A.T.M.A.N.] [PATCHv2 2/2] batman-adv: Use kernel functions to identify broadcasts X-BeenThere: b.a.t.m.a.n@lists.open-mesh.org X-Mailman-Version: 2.1.11 Precedence: list Reply-To: The list for a Better Approach To Mobile Ad-hoc Networking List-Id: The list for a Better Approach To Mobile Ad-hoc Networking List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Nov 2010 09:25:26 -0000 linux/etherdevice.h already provides functions to classify different ethernet addresses. These inlineable functions should be used instead of custom functions. The check for multicast together with multicast can also be replaced with a single test for multicast because for every ethernet address x following is always true: is_broadcast_ether_addr(x) => is_multicast_ether_addr(x) or when looking more at the implementation: (FF:FF:FF:FF:FF:FF == x) => [(01:00:00:00:00:00 & x) != 00:00:00:00:00:00] Reported-by: Tobias Klauser Signed-off-by: Sven Eckelmann Cc: Tobias Klauser --- tklauser: Please tell us how you want to handle that patch. If you want resend yours or if it would be ok to use this patch - or maybe a third option. batman-adv/main.c | 10 ---------- batman-adv/main.h | 3 +-- batman-adv/routing.c | 16 ++++++++-------- batman-adv/soft-interface.c | 2 +- batman-adv/unicast.c | 2 +- batman-adv/vis.c | 4 ++-- 6 files changed, 13 insertions(+), 24 deletions(-) diff --git a/batman-adv/main.c b/batman-adv/main.c index c91e635..b827f6a 100644 --- a/batman-adv/main.c +++ b/batman-adv/main.c @@ -172,16 +172,6 @@ int is_my_mac(uint8_t *addr) } -int is_bcast(uint8_t *addr) -{ - return (addr[0] == (uint8_t)0xff) && (addr[1] == (uint8_t)0xff); -} - -int is_mcast(uint8_t *addr) -{ - return *addr & 0x01; -} - module_init(batman_init); module_exit(batman_exit); diff --git a/batman-adv/main.h b/batman-adv/main.h index 519d3b0..a362433 100644 --- a/batman-adv/main.h +++ b/batman-adv/main.h @@ -112,6 +112,7 @@ #include /* mutex */ #include /* needed by all modules */ #include /* netdevice */ +#include /* ethernet address classifaction */ #include /* ethernet header */ #include /* poll_table */ #include /* kernel threads */ @@ -141,8 +142,6 @@ void mesh_free(struct net_device *soft_iface); void inc_module_count(void); void dec_module_count(void); int is_my_mac(uint8_t *addr); -int is_bcast(uint8_t *addr); -int is_mcast(uint8_t *addr); #ifdef CONFIG_BATMAN_ADV_DEBUG int debug_log(struct bat_priv *bat_priv, char *fmt, ...); diff --git a/batman-adv/routing.c b/batman-adv/routing.c index 9f31167..d8b0c5a 100644 --- a/batman-adv/routing.c +++ b/batman-adv/routing.c @@ -770,11 +770,11 @@ int recv_bat_packet(struct sk_buff *skb, struct batman_if *batman_if) ethhdr = (struct ethhdr *)skb_mac_header(skb); /* packet with broadcast indication but unicast recipient */ - if (!is_bcast(ethhdr->h_dest)) + if (!is_broadcast_ether_addr(ethhdr->h_dest)) return NET_RX_DROP; /* packet with broadcast sender address */ - if (is_bcast(ethhdr->h_source)) + if (is_broadcast_ether_addr(ethhdr->h_source)) return NET_RX_DROP; /* create a copy of the skb, if needed, to modify it. */ @@ -946,11 +946,11 @@ int recv_icmp_packet(struct sk_buff *skb, struct batman_if *recv_if) ethhdr = (struct ethhdr *)skb_mac_header(skb); /* packet with unicast indication but broadcast recipient */ - if (is_bcast(ethhdr->h_dest)) + if (is_broadcast_ether_addr(ethhdr->h_dest)) return NET_RX_DROP; /* packet with broadcast sender address */ - if (is_bcast(ethhdr->h_source)) + if (is_broadcast_ether_addr(ethhdr->h_source)) return NET_RX_DROP; /* not for me */ @@ -1118,11 +1118,11 @@ static int check_unicast_packet(struct sk_buff *skb, int hdr_size) ethhdr = (struct ethhdr *)skb_mac_header(skb); /* packet with unicast indication but broadcast recipient */ - if (is_bcast(ethhdr->h_dest)) + if (is_broadcast_ether_addr(ethhdr->h_dest)) return -1; /* packet with broadcast sender address */ - if (is_bcast(ethhdr->h_source)) + if (is_broadcast_ether_addr(ethhdr->h_source)) return -1; /* not for me */ @@ -1282,11 +1282,11 @@ int recv_bcast_packet(struct sk_buff *skb, struct batman_if *recv_if) ethhdr = (struct ethhdr *)skb_mac_header(skb); /* packet with broadcast indication but unicast recipient */ - if (!is_bcast(ethhdr->h_dest)) + if (!is_broadcast_ether_addr(ethhdr->h_dest)) return NET_RX_DROP; /* packet with broadcast sender address */ - if (is_bcast(ethhdr->h_source)) + if (is_broadcast_ether_addr(ethhdr->h_source)) return NET_RX_DROP; /* ignore broadcasts sent by myself */ diff --git a/batman-adv/soft-interface.c b/batman-adv/soft-interface.c index 1e55bdb..e93a99f 100644 --- a/batman-adv/soft-interface.c +++ b/batman-adv/soft-interface.c @@ -378,7 +378,7 @@ int interface_tx(struct sk_buff *skb, struct net_device *soft_iface) /* TODO: check this for locks */ hna_local_add(soft_iface, ethhdr->h_source); - if (is_bcast(ethhdr->h_dest) || is_mcast(ethhdr->h_dest)) { + if (is_multicast_ether_addr(ethhdr->h_dest)) { ret = gw_is_target(bat_priv, skb); if (ret < 0) diff --git a/batman-adv/unicast.c b/batman-adv/unicast.c index 7b9385b..dc2e28b 100644 --- a/batman-adv/unicast.c +++ b/batman-adv/unicast.c @@ -283,7 +283,7 @@ int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv) spin_lock_bh(&bat_priv->orig_hash_lock); /* get routing information */ - if (is_bcast(ethhdr->h_dest) || is_mcast(ethhdr->h_dest)) + if (is_multicast_ether_addr(ethhdr->h_dest)) orig_node = (struct orig_node *)gw_get_selected(bat_priv); else orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash, diff --git a/batman-adv/vis.c b/batman-adv/vis.c index 65676dc..957a086 100644 --- a/batman-adv/vis.c +++ b/batman-adv/vis.c @@ -472,7 +472,7 @@ void receive_client_update_packet(struct bat_priv *bat_priv, int are_target = 0; /* clients shall not broadcast. */ - if (is_bcast(vis_packet->target_orig)) + if (is_broadcast_ether_addr(vis_packet->target_orig)) return; /* Are we the target for this VIS packet? */ @@ -755,7 +755,7 @@ static void send_vis_packet(struct bat_priv *bat_priv, struct vis_info *info) ETH_ALEN); packet->ttl--; - if (is_bcast(packet->target_orig)) + if (is_broadcast_ether_addr(packet->target_orig)) broadcast_vis_packet(bat_priv, info); else unicast_vis_packet(bat_priv, info);