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author | Linus Lüssing <linus.luessing@web.de> | 2010-06-06 21:28:17 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-06-18 16:59:40 -0700 |
commit | 96d592ed599434d2d5f339a1d282871bc6377d2c (patch) | |
tree | bc18bc54567c561235bb552e14cb5839657e5a94 | |
parent | 186305aa1284ac0cae88e18b837c33d5a4a84afc (diff) | |
download | op-kernel-dev-96d592ed599434d2d5f339a1d282871bc6377d2c.zip op-kernel-dev-96d592ed599434d2d5f339a1d282871bc6377d2c.tar.gz |
Staging: batman-adv: Adding netfilter-bridge hooks
batman-adv is receiving and sending the packets of its own ether type
on a very early/low level. Therefore we need to add explicit hooks to
give netfilter/ebtables a chance to filter them.
Reported-by: Antonio Quartulli <ordex@ritirata.org>
Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: Sven Eckelmann <sven.eckelmann@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r-- | drivers/staging/batman-adv/hard-interface.c | 14 | ||||
-rw-r--r-- | drivers/staging/batman-adv/send.c | 9 |
2 files changed, 20 insertions, 3 deletions
diff --git a/drivers/staging/batman-adv/hard-interface.c b/drivers/staging/batman-adv/hard-interface.c index 7a582e8..6939b8d 100644 --- a/drivers/staging/batman-adv/hard-interface.c +++ b/drivers/staging/batman-adv/hard-interface.c @@ -30,6 +30,7 @@ #include "hash.h" #include <linux/if_arp.h> +#include <linux/netfilter_bridge.h> #define MIN(x, y) ((x) < (y) ? (x) : (y)) @@ -432,6 +433,11 @@ out: return NOTIFY_DONE; } +static int batman_skb_recv_finish(struct sk_buff *skb) +{ + return NF_ACCEPT; +} + /* receive a packet with the batman ethertype coming on a hard * interface */ int batman_skb_recv(struct sk_buff *skb, struct net_device *dev, @@ -451,6 +457,13 @@ int batman_skb_recv(struct sk_buff *skb, struct net_device *dev, if (atomic_read(&module_state) != MODULE_ACTIVE) goto err_free; + /* if netfilter/ebtables wants to block incoming batman + * packets then give them a chance to do so here */ + ret = NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_IN, skb, dev, NULL, + batman_skb_recv_finish); + if (ret != 1) + goto err_out; + /* packet should hold at least type and version */ if (unlikely(skb_headlen(skb) < 2)) goto err_free; @@ -530,7 +543,6 @@ err_out: return NET_RX_DROP; } - struct notifier_block hard_if_notifier = { .notifier_call = hard_if_event, }; diff --git a/drivers/staging/batman-adv/send.c b/drivers/staging/batman-adv/send.c index ac69ed8..7365f6d 100644 --- a/drivers/staging/batman-adv/send.c +++ b/drivers/staging/batman-adv/send.c @@ -29,6 +29,8 @@ #include "vis.h" #include "aggregation.h" +#include <linux/netfilter_bridge.h> + /* apply hop penalty for a normal link */ static uint8_t hop_penalty(const uint8_t tq) { @@ -90,9 +92,12 @@ int send_skb_packet(struct sk_buff *skb, /* dev_queue_xmit() returns a negative result on error. However on * congestion and traffic shaping, it drops and returns NET_XMIT_DROP - * (which is > 0). This will not be treated as an error. */ + * (which is > 0). This will not be treated as an error. + * Also, if netfilter/ebtables wants to block outgoing batman + * packets then giving them a chance to do so here */ - return dev_queue_xmit(skb); + return NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev, + dev_queue_xmit); send_skb_err: kfree_skb(skb); return NET_XMIT_DROP; |