net: Add batman-adv meshing protocol

B.A.T.M.A.N. (better approach to mobile ad-hoc networking) is a routing
protocol for multi-hop ad-hoc mesh networks. The networks may be wired or
wireless. See http://www.open-mesh.org/ for more information and user space
tools.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 136 insertions, 0 deletions

diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h
new file mode 100644
index 00000000000..b49fdf70a6d
--- /dev/null
+++ b/net/batman-adv/packet.h
@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner, Simon Wunderlich
+ *
+ * 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_PACKET_H_
+#define _NET_BATMAN_ADV_PACKET_H_
+
+#define ETH_P_BATMAN  0x4305	/* unofficial/not registered Ethertype */
+
+#define BAT_PACKET       0x01
+#define BAT_ICMP         0x02
+#define BAT_UNICAST      0x03
+#define BAT_BCAST        0x04
+#define BAT_VIS          0x05
+#define BAT_UNICAST_FRAG 0x06
+
+/* this file is included by batctl which needs these defines */
+#define COMPAT_VERSION 12
+#define DIRECTLINK 0x40
+#define VIS_SERVER 0x20
+#define PRIMARIES_FIRST_HOP 0x10
+
+/* ICMP message types */
+#define ECHO_REPLY 0
+#define DESTINATION_UNREACHABLE 3
+#define ECHO_REQUEST 8
+#define TTL_EXCEEDED 11
+#define PARAMETER_PROBLEM 12
+
+/* vis defines */
+#define VIS_TYPE_SERVER_SYNC		0
+#define VIS_TYPE_CLIENT_UPDATE		1
+
+/* fragmentation defines */
+#define UNI_FRAG_HEAD 0x01
+
+struct batman_packet {
+	uint8_t  packet_type;
+	uint8_t  version;  /* batman version field */
+	uint8_t  flags;    /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
+	uint8_t  tq;
+	uint32_t seqno;
+	uint8_t  orig[6];
+	uint8_t  prev_sender[6];
+	uint8_t  ttl;
+	uint8_t  num_hna;
+	uint8_t  gw_flags;  /* flags related to gateway class */
+	uint8_t  align;
+} __attribute__((packed));
+
+#define BAT_PACKET_LEN sizeof(struct batman_packet)
+
+struct icmp_packet {
+	uint8_t  packet_type;
+	uint8_t  version;  /* batman version field */
+	uint8_t  msg_type; /* see ICMP message types above */
+	uint8_t  ttl;
+	uint8_t  dst[6];
+	uint8_t  orig[6];
+	uint16_t seqno;
+	uint8_t  uid;
+} __attribute__((packed));
+
+#define BAT_RR_LEN 16
+
+/* icmp_packet_rr must start with all fields from imcp_packet
+ * as this is assumed by code that handles ICMP packets */
+struct icmp_packet_rr {
+	uint8_t  packet_type;
+	uint8_t  version;  /* batman version field */
+	uint8_t  msg_type; /* see ICMP message types above */
+	uint8_t  ttl;
+	uint8_t  dst[6];
+	uint8_t  orig[6];
+	uint16_t seqno;
+	uint8_t  uid;
+	uint8_t  rr_cur;
+	uint8_t  rr[BAT_RR_LEN][ETH_ALEN];
+} __attribute__((packed));
+
+struct unicast_packet {
+	uint8_t  packet_type;
+	uint8_t  version;  /* batman version field */
+	uint8_t  dest[6];
+	uint8_t  ttl;
+} __attribute__((packed));
+
+struct unicast_frag_packet {
+	uint8_t  packet_type;
+	uint8_t  version;  /* batman version field */
+	uint8_t  dest[6];
+	uint8_t  ttl;
+	uint8_t  flags;
+	uint8_t  orig[6];
+	uint16_t seqno;
+} __attribute__((packed));
+
+struct bcast_packet {
+	uint8_t  packet_type;
+	uint8_t  version;  /* batman version field */
+	uint8_t  orig[6];
+	uint8_t  ttl;
+	uint32_t seqno;
+} __attribute__((packed));
+
+struct vis_packet {
+	uint8_t  packet_type;
+	uint8_t  version;        /* batman version field */
+	uint8_t  vis_type;	 /* which type of vis-participant sent this? */
+	uint8_t  entries;	 /* number of entries behind this struct */
+	uint32_t seqno;		 /* sequence number */
+	uint8_t  ttl;		 /* TTL */
+	uint8_t  vis_orig[6];	 /* originator that informs about its
+				  * neighbors */
+	uint8_t  target_orig[6]; /* who should receive this packet */
+	uint8_t  sender_orig[6]; /* who sent or rebroadcasted this packet */
+} __attribute__((packed));
+
+#endif /* _NET_BATMAN_ADV_PACKET_H_ */