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-rw-r--r--net/batman-adv/unicast.h27
1 files changed, 25 insertions, 2 deletions
diff --git a/net/batman-adv/unicast.h b/net/batman-adv/unicast.h
index e32b786..16ad7a9 100644
--- a/net/batman-adv/unicast.h
+++ b/net/batman-adv/unicast.h
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2010 B.A.T.M.A.N. contributors:
+ * Copyright (C) 2010-2011 B.A.T.M.A.N. contributors:
*
* Andreas Langer
*
@@ -22,6 +22,8 @@
#ifndef _NET_BATMAN_ADV_UNICAST_H_
#define _NET_BATMAN_ADV_UNICAST_H_
+#include "packet.h"
+
#define FRAG_TIMEOUT 10000 /* purge frag list entrys after time in ms */
#define FRAG_BUFFER_SIZE 6 /* number of list elements in buffer */
@@ -30,6 +32,27 @@ int frag_reassemble_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
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[]);
+ struct hard_iface *hard_iface, uint8_t dstaddr[]);
+
+static inline int frag_can_reassemble(struct sk_buff *skb, int mtu)
+{
+ struct unicast_frag_packet *unicast_packet;
+ int uneven_correction = 0;
+ unsigned int merged_size;
+
+ unicast_packet = (struct unicast_frag_packet *)skb->data;
+
+ if (unicast_packet->flags & UNI_FRAG_LARGETAIL) {
+ if (unicast_packet->flags & UNI_FRAG_HEAD)
+ uneven_correction = 1;
+ else
+ uneven_correction = -1;
+ }
+
+ merged_size = (skb->len - sizeof(struct unicast_frag_packet)) * 2;
+ merged_size += sizeof(struct unicast_packet) + uneven_correction;
+
+ return merged_size <= mtu;
+}
#endif /* _NET_BATMAN_ADV_UNICAST_H_ */
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