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authorAntonio Quartulli <antonio@open-mesh.com>2013-11-05 19:31:08 +0100
committerAntonio Quartulli <antonio@meshcoding.com>2014-01-08 20:49:42 +0100
commit6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9 (patch)
tree5e7d10d691a64b8ae180d4f718a41120118c6432 /net/batman-adv/send.c
parent36484f84d567f79fc7cc62c4391c7752a0ede7f2 (diff)
downloadop-kernel-dev-6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9.zip
op-kernel-dev-6c413b1c22a2c4ef324f1c6f2c282f1ca10a93b9.tar.gz
batman-adv: send every DHCP packet as bat-unicast
In different situations it is possible that the DHCP server or client uses broadcast Ethernet frames to send messages to each other. The GW component in batman-adv takes care of using bat-unicast packets to bring broadcast DHCP Discover/Requests to the "best" server. On the way back the DHCP server usually sends unicasts, but upon client request it may decide to use broadcasts as well. This patch improves the GW component so that it now snoops and sends as unicast all the DHCP packets, no matter if they were generated by a DHCP server or client. Signed-off-by: Antonio Quartulli <antonio@open-mesh.com> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Diffstat (limited to 'net/batman-adv/send.c')
-rw-r--r--net/batman-adv/send.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c
index cea6578..30d12c4 100644
--- a/net/batman-adv/send.c
+++ b/net/batman-adv/send.c
@@ -319,13 +319,23 @@ out:
*/
int batadv_send_skb_via_tt_generic(struct batadv_priv *bat_priv,
struct sk_buff *skb, int packet_type,
- int packet_subtype, unsigned short vid)
+ int packet_subtype, uint8_t *dst_hint,
+ unsigned short vid)
{
struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
struct batadv_orig_node *orig_node;
+ uint8_t *src, *dst;
+
+ src = ethhdr->h_source;
+ dst = ethhdr->h_dest;
+
+ /* if we got an hint! let's send the packet to this client (if any) */
+ if (dst_hint) {
+ src = NULL;
+ dst = dst_hint;
+ }
+ orig_node = batadv_transtable_search(bat_priv, src, dst, vid);
- orig_node = batadv_transtable_search(bat_priv, ethhdr->h_source,
- ethhdr->h_dest, vid);
return batadv_send_skb_unicast(bat_priv, skb, packet_type,
packet_subtype, orig_node, vid);
}
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