summaryrefslogtreecommitdiffstats
path: root/net/batman-adv
diff options
context:
space:
mode:
authorMarek Lindner <lindner_marek@yahoo.de>2012-03-04 16:56:25 +0800
committerAntonio Quartulli <ordex@autistici.org>2012-05-11 10:08:11 +0200
commitc3e29312c8c27d403f91522711ce9a290c7571c9 (patch)
treea366ebef6e2d65ed5fdbec48e38fc3e630a9e367 /net/batman-adv
parentffa995e036bef734ea40cbbccda574d1df3a8a58 (diff)
downloadop-kernel-dev-c3e29312c8c27d403f91522711ce9a290c7571c9.zip
op-kernel-dev-c3e29312c8c27d403f91522711ce9a290c7571c9.tar.gz
batman-adv: register batman ogm receive function during protocol init
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 <lindner_marek@yahoo.de> Acked-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Diffstat (limited to 'net/batman-adv')
-rw-r--r--net/batman-adv/bat_iv_ogm.c31
-rw-r--r--net/batman-adv/main.c5
-rw-r--r--net/batman-adv/routing.c22
-rw-r--r--net/batman-adv/routing.h4
-rw-r--r--net/batman-adv/types.h3
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 d19b935..f80c447 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 packet */
@@ -334,8 +332,7 @@ 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 ff56086..7ed9d8f 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;
-
- bat_priv->bat_algo_ops->bat_ogm_receive(hard_iface, skb);
+ return false;
- 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 2f4848b..50e1895 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -390,9 +390,6 @@ 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);
};
#endif /* _NET_BATMAN_ADV_TYPES_H_ */
OpenPOWER on IntegriCloud