Staging: batman-adv: fragment forwarded packets

If a packet is too big to be forwarded over an interface it will be
fragmented on-the-fly (if fragmentation is enabled).

Signed-off-by: Andreas Langer <an.langer@gmx.de>
Signed-off-by: Sven Eckelmann <sven.eckelmann@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/batman-adv/routing.c b/drivers/staging/batman-adv/routing.c
index 9b61d6b..1e10111 100644 (file)
--- a/drivers/staging/batman-adv/routing.c
+++ b/drivers/staging/batman-adv/routing.c
@@ -1165,6 +1165,12 @@ static int route_unicast_packet(struct sk_buff *skb,
 
        unicast_packet = (struct unicast_packet *)skb->data;
 
+       if (unicast_packet->packet_type == BAT_UNICAST &&
+           atomic_read(&bat_priv->frag_enabled) &&
+           skb->len > batman_if->net_dev->mtu)
+               return frag_send_skb(skb, bat_priv, batman_if,
+                                    dstaddr);
+
        /* decrement ttl */
        unicast_packet->ttl--;
 

diff --git a/drivers/staging/batman-adv/unicast.c b/drivers/staging/batman-adv/unicast.c
index 57fe2de..12afae6 100644 (file)
--- a/drivers/staging/batman-adv/unicast.c
+++ b/drivers/staging/batman-adv/unicast.c
@@ -206,8 +206,8 @@ out:
        return ret;
 }
 
-static int frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
-                        struct batman_if *batman_if, uint8_t dstaddr[])
+int frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
+                 struct batman_if *batman_if, uint8_t dstaddr[])
 {
        struct unicast_packet tmp_uc, *unicast_packet;
        struct sk_buff *frag_skb;

diff --git a/drivers/staging/batman-adv/unicast.h b/drivers/staging/batman-adv/unicast.h
index 5908b01..e32b786 100644 (file)
--- a/drivers/staging/batman-adv/unicast.h
+++ b/drivers/staging/batman-adv/unicast.h
@@ -29,5 +29,7 @@ int frag_reassemble_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
                        struct sk_buff **new_skb);
 void frag_list_free(struct list_head *head);
 int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv);
+int frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
+                 struct batman_if *batman_if, uint8_t dstaddr[]);
 
 #endif /* _NET_BATMAN_ADV_UNICAST_H_ */