From mboxrd@z Thu Jan 1 00:00:00 1970 From: Antonio Quartulli Subject: [PATCH 12/15] batman-adv: register batman ogm receive function during protocol init Date: Sun, 29 Apr 2012 10:57:44 +0200 Message-ID: <1335689867-8017-13-git-send-email-ordex@autistici.org> References: <1335689867-8017-1-git-send-email-ordex@autistici.org> Cc: netdev@vger.kernel.org, b.a.t.m.a.n@lists.open-mesh.org, Marek Lindner , Antonio Quartulli To: davem@davemloft.net Return-path: Received: from investici.nine.ch ([217.150.252.179]:57909 "EHLO confino.investici.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753695Ab2D2I46 (ORCPT ); Sun, 29 Apr 2012 04:56:58 -0400 In-Reply-To: <1335689867-8017-1-git-send-email-ordex@autistici.org> Sender: netdev-owner@vger.kernel.org List-ID: From: Marek Lindner The B.A.T.M.A.N. IV OGM receive function still was hard-coded although it is a routing protocol specific function. This patch takes advantage of the dynamic packet handler registration to remove the hard-coded function calls. Signed-off-by: Marek Lindner Acked-by: Simon Wunderlich Signed-off-by: Antonio Quartulli --- net/batman-adv/bat_iv_ogm.c | 31 +++++++++++++++++++++++++++---- net/batman-adv/main.c | 5 +---- net/batman-adv/routing.c | 22 ++++++++++------------ net/batman-adv/routing.h | 4 +++- net/batman-adv/types.h | 3 --- 5 files changed, 41 insertions(+), 24 deletions(-) diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c index cd8f473..e0aaf8c 100644 --- a/net/batman-adv/bat_iv_ogm.c +++ b/net/batman-adv/bat_iv_ogm.c @@ -1155,13 +1155,18 @@ out: orig_node_free_ref(orig_node); } -static void bat_iv_ogm_receive(struct hard_iface *if_incoming, - struct sk_buff *skb) +static int bat_iv_ogm_receive(struct sk_buff *skb, + struct hard_iface *if_incoming) { struct batman_ogm_packet *batman_ogm_packet; struct ethhdr *ethhdr; int buff_pos = 0, packet_len; unsigned char *tt_buff, *packet_buff; + bool ret; + + ret = check_management_packet(skb, if_incoming, BATMAN_OGM_HLEN); + if (!ret) + return NET_RX_DROP; packet_len = skb_headlen(skb); ethhdr = (struct ethhdr *)skb_mac_header(skb); @@ -1187,6 +1192,9 @@ static void bat_iv_ogm_receive(struct hard_iface *if_incoming, (packet_buff + buff_pos); } while (bat_iv_ogm_aggr_packet(buff_pos, packet_len, batman_ogm_packet->tt_num_changes)); + + kfree_skb(skb); + return NET_RX_SUCCESS; } static struct bat_algo_ops batman_iv __read_mostly = { @@ -1197,10 +1205,25 @@ static struct bat_algo_ops batman_iv __read_mostly = { .bat_ogm_update_mac = bat_iv_ogm_update_mac, .bat_ogm_schedule = bat_iv_ogm_schedule, .bat_ogm_emit = bat_iv_ogm_emit, - .bat_ogm_receive = bat_iv_ogm_receive, }; int __init bat_iv_init(void) { - return bat_algo_register(&batman_iv); + int ret; + + /* batman originator packet */ + ret = recv_handler_register(BAT_IV_OGM, bat_iv_ogm_receive); + if (ret < 0) + goto out; + + ret = bat_algo_register(&batman_iv); + if (ret < 0) + goto handler_unregister; + + goto out; + +handler_unregister: + recv_handler_unregister(BAT_IV_OGM); +out: + return ret; } diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c index 87af1a3..7a3bfae 100644 --- a/net/batman-adv/main.c +++ b/net/batman-adv/main.c @@ -266,8 +266,6 @@ static void recv_handler_init(void) for (i = 0; i < ARRAY_SIZE(recv_packet_handler); i++) recv_packet_handler[i] = recv_unhandled_packet; - /* batman originator packet */ - recv_packet_handler[BAT_IV_OGM] = recv_bat_ogm_packet; /* batman icmp packet */ recv_packet_handler[BAT_ICMP] = recv_icmp_packet; /* unicast with 4 addresses packet */ @@ -336,8 +334,7 @@ int bat_algo_register(struct bat_algo_ops *bat_algo_ops) !bat_algo_ops->bat_primary_iface_set || !bat_algo_ops->bat_ogm_update_mac || !bat_algo_ops->bat_ogm_schedule || - !bat_algo_ops->bat_ogm_emit || - !bat_algo_ops->bat_ogm_receive) { + !bat_algo_ops->bat_ogm_emit) { pr_info("Routing algo '%s' does not implement required ops\n", bat_algo_ops->name); goto out; diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c index 5f19bbb..83f8115 100644 --- a/net/batman-adv/routing.c +++ b/net/batman-adv/routing.c @@ -248,37 +248,35 @@ int window_protected(struct bat_priv *bat_priv, int32_t seq_num_diff, return 0; } -int recv_bat_ogm_packet(struct sk_buff *skb, struct hard_iface *hard_iface) +bool check_management_packet(struct sk_buff *skb, + struct hard_iface *hard_iface, + int header_len) { - struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface); struct ethhdr *ethhdr; /* drop packet if it has not necessary minimum size */ - if (unlikely(!pskb_may_pull(skb, BATMAN_OGM_HLEN))) - return NET_RX_DROP; + if (unlikely(!pskb_may_pull(skb, header_len))) + return false; ethhdr = (struct ethhdr *)skb_mac_header(skb); /* packet with broadcast indication but unicast recipient */ if (!is_broadcast_ether_addr(ethhdr->h_dest)) - return NET_RX_DROP; + return false; /* packet with broadcast sender address */ if (is_broadcast_ether_addr(ethhdr->h_source)) - return NET_RX_DROP; + return false; /* create a copy of the skb, if needed, to modify it. */ if (skb_cow(skb, 0) < 0) - return NET_RX_DROP; + return false; /* keep skb linear */ if (skb_linearize(skb) < 0) - return NET_RX_DROP; + return false; - bat_priv->bat_algo_ops->bat_ogm_receive(hard_iface, skb); - - kfree_skb(skb); - return NET_RX_SUCCESS; + return true; } static int recv_my_icmp_packet(struct bat_priv *bat_priv, diff --git a/net/batman-adv/routing.h b/net/batman-adv/routing.h index 3d729cb..d6bbbeb 100644 --- a/net/batman-adv/routing.h +++ b/net/batman-adv/routing.h @@ -23,6 +23,9 @@ #define _NET_BATMAN_ADV_ROUTING_H_ void slide_own_bcast_window(struct hard_iface *hard_iface); +bool check_management_packet(struct sk_buff *skb, + struct hard_iface *hard_iface, + int header_len); void update_route(struct bat_priv *bat_priv, struct orig_node *orig_node, struct neigh_node *neigh_node); int recv_icmp_packet(struct sk_buff *skb, struct hard_iface *recv_if); @@ -30,7 +33,6 @@ int recv_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if); int recv_ucast_frag_packet(struct sk_buff *skb, struct hard_iface *recv_if); int recv_bcast_packet(struct sk_buff *skb, struct hard_iface *recv_if); int recv_vis_packet(struct sk_buff *skb, struct hard_iface *recv_if); -int recv_bat_ogm_packet(struct sk_buff *skb, struct hard_iface *recv_if); int recv_tt_query(struct sk_buff *skb, struct hard_iface *recv_if); int recv_roam_adv(struct sk_buff *skb, struct hard_iface *recv_if); struct neigh_node *find_router(struct bat_priv *bat_priv, diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h index 2b8ffcb..ed6db5c 100644 --- a/net/batman-adv/types.h +++ b/net/batman-adv/types.h @@ -407,9 +407,6 @@ struct bat_algo_ops { int tt_num_changes); /* send scheduled OGM */ void (*bat_ogm_emit)(struct forw_packet *forw_packet); - /* receive incoming OGM */ - void (*bat_ogm_receive)(struct hard_iface *if_incoming, - struct sk_buff *skb); }; struct dht_candidate { -- 1.7.9.4