1 files changed, 92 insertions, 0 deletions
diff --git a/net/batman-adv/unicast.h b/net/batman-adv/unicast.h
new file mode 100644
index 00000000..429cf8a4
--- /dev/null
+++ b/net/batman-adv/unicast.h
@@ -0,0 +1,92 @@
+/* Copyright (C) 2010-2013 B.A.T.M.A.N. contributors:
+ *
+ * Andreas Langer
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#ifndef _NET_BATMAN_ADV_UNICAST_H_
+#define _NET_BATMAN_ADV_UNICAST_H_
+
+#include "packet.h"
+
+#define BATADV_FRAG_TIMEOUT 10000 /* purge frag list entries after time in ms */
+#define BATADV_FRAG_BUFFER_SIZE 6 /* number of list elements in buffer */
+
+int batadv_frag_reassemble_skb(struct sk_buff *skb,
+			       struct batadv_priv *bat_priv,
+			       struct sk_buff **new_skb);
+void batadv_frag_list_free(struct list_head *head);
+int batadv_frag_send_skb(struct sk_buff *skb, struct batadv_priv *bat_priv,
+			 struct batadv_hard_iface *hard_iface,
+			 const uint8_t dstaddr[]);
+bool batadv_unicast_4addr_prepare_skb(struct batadv_priv *bat_priv,
+				      struct sk_buff *skb,
+				      struct batadv_orig_node *orig_node,
+				      int packet_subtype);
+int batadv_unicast_generic_send_skb(struct batadv_priv *bat_priv,
+				    struct sk_buff *skb, int packet_type,
+				    int packet_subtype);
+
+
+/**
+ * batadv_unicast_send_skb - send the skb encapsulated in a unicast packet
+ * @bat_priv: the bat priv with all the soft interface information
+ * @skb: the payload to send
+ */
+static inline int batadv_unicast_send_skb(struct batadv_priv *bat_priv,
+					  struct sk_buff *skb)
+{
+	return batadv_unicast_generic_send_skb(bat_priv, skb, BATADV_UNICAST,
+					       0);
+}
+
+/**
+ * batadv_unicast_send_skb - send the skb encapsulated in a unicast4addr packet
+ * @bat_priv: the bat priv with all the soft interface information
+ * @skb: the payload to send
+ * @packet_subtype: the batman 4addr packet subtype to use
+ */
+static inline int batadv_unicast_4addr_send_skb(struct batadv_priv *bat_priv,
+						struct sk_buff *skb,
+						int packet_subtype)
+{
+	return batadv_unicast_generic_send_skb(bat_priv, skb,
+					       BATADV_UNICAST_4ADDR,
+					       packet_subtype);
+}
+
+static inline int batadv_frag_can_reassemble(const struct sk_buff *skb, int mtu)
+{
+	const struct batadv_unicast_frag_packet *unicast_packet;
+	int uneven_correction = 0;
+	unsigned int merged_size;
+
+	unicast_packet = (struct batadv_unicast_frag_packet *)skb->data;
+
+	if (unicast_packet->flags & BATADV_UNI_FRAG_LARGETAIL) {
+		if (unicast_packet->flags & BATADV_UNI_FRAG_HEAD)
+			uneven_correction = 1;
+		else
+			uneven_correction = -1;
+	}
+
+	merged_size = (skb->len - sizeof(*unicast_packet)) * 2;
+	merged_size += sizeof(struct batadv_unicast_packet) + uneven_correction;
+
+	return merged_size <= mtu;
+}
+
+#endif /* _NET_BATMAN_ADV_UNICAST_H_ */