From Sven Eckelmann (bug 2632):

Added B.A.T.M.A.N. dissector

svn path=/trunk/; revision=25520

1 files changed, 443 insertions, 0 deletions

diff --git a/epan/dissectors/packet-bat-vis.c b/epan/dissectors/packet-bat-vis.c
new file mode 100644
index 0000000000..e352ed6b69
--- /dev/null
+++ b/epan/dissectors/packet-bat-vis.c
@@ -0,0 +1,443 @@
+/* packet-bat-vis.c
+ * Routines for B.A.T.M.A.N. Layer 3 dissection
+ * Copyright 2008, Sven Eckelmann <sven.eckelmann@gmx.de>
+ *
+ * $Id$
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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.
+ */
+
+#include "packet-bat.h"
+#include <epan/addr_resolv.h>
+
+static gint ett_bat_vis = -1;
+static gint ett_bat_vis_entry = -1;
+
+static dissector_handle_t data_handle;
+
+static int hf_bat_vis_vis_orig = -1;
+static int hf_bat_vis_version = -1;
+static int hf_bat_vis_gwflags = -1;
+static int hf_bat_max_tq_v22 = -1;
+static int hf_bat_max_tq_v23 = -1;
+static int hf_bat_vis_data_type = -1;
+static int hf_bat_vis_netmask = -1;
+static int hf_bat_vis_tq_v22 = -1;
+static int hf_bat_vis_tq_v23 = -1;
+static int hf_bat_vis_data_ip = -1;
+
+static guint global_bat_vis_udp_port = BAT_VIS_PORT;
+static guint udp_port = 0;
+
+static void dissect_vis_entry_v22(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
+static void dissect_bat_vis_v22(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
+static void dissect_vis_entry_v23(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
+static void dissect_bat_vis_v23(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
+static void dissect_bat_vis(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
+
+static const value_string packettypenames[] = {
+	{ DATA_TYPE_NEIGH, "NEIGH" },
+	{ DATA_TYPE_SEC_IF, "SEC_IF" },
+	{ DATA_TYPE_HNA, "HNA" },
+	{ 3, NULL }
+};
+
+void register_bat_vis(void)
+{
+	static hf_register_info hf[] = {
+		{ &hf_bat_vis_vis_orig,
+			{ "Originator", "bat.vis.sender_ip",
+				FT_IPv4, BASE_NONE, NULL, 0x0,
+				"", HFILL }
+		},
+		{ &hf_bat_vis_version,
+		  { "Version", "bat.vis.version",
+		    FT_UINT8, BASE_DEC, NULL, 0x0,
+		    "", HFILL }
+		},
+		{ &hf_bat_vis_gwflags,
+		  { "Gateway Flags", "bat.vis.gwflags",
+		    FT_UINT8, BASE_HEX, NULL, 0x0,
+		    "", HFILL }
+		},
+		{ &hf_bat_max_tq_v22,
+		  { "Maximum Transmission Quality", "bat.vis.tq_max",
+		    FT_UINT16, BASE_DEC, NULL, 0x0,
+		    "", HFILL }
+		},
+		{ &hf_bat_max_tq_v23,
+		  { "Maximum Transmission Quality", "bat.vis.tq_max",
+		    FT_UINT8, BASE_DEC, NULL, 0x0,
+		    "", HFILL }
+		},
+		{ &hf_bat_vis_data_type,
+		  { "Type", "bat.vis.data_type",
+		    FT_UINT8, BASE_DEC, VALS(packettypenames), 0x0,
+		    "", HFILL }
+		},
+		{ &hf_bat_vis_tq_v22,
+		  { "Transmission Quality", "bat.vis.tq",
+		    FT_UINT16, BASE_DEC, NULL, 0x0,
+		    "", HFILL}
+		},
+		{ &hf_bat_vis_tq_v23,
+		  { "Transmission Quality", "bat.vis.tq",
+		    FT_UINT8, BASE_DEC, NULL, 0x0,
+		    "", HFILL}
+		},
+		{ &hf_bat_vis_netmask,
+		  { "Netmask", "bat.vis.netmask",
+		    FT_UINT8, BASE_DEC, NULL, 0x0,
+		    "", HFILL}
+		},
+		{ &hf_bat_vis_data_ip,
+		  { "IP", "bat.vis.data_ip",
+		    FT_IPv4, BASE_NONE, NULL, 0x0,
+		    "", HFILL }
+		}
+	};
+
+	/* Setup protocol subtree array */
+	static gint *ett[] = {
+		&ett_bat_vis,
+		&ett_bat_vis_entry
+	};
+
+	proto_register_subtree_array(ett, array_length(ett));
+	proto_register_field_array(proto_bat_plugin, hf, array_length(hf));
+
+	prefs_register_uint_preference(bat_module, "udp.vis.port", "VIS UDP Port",
+	                               "Set the port for B.A.T.M.A.N. VIS "
+	                               "messages (if other than the default of 4307)",
+	                               10, &global_bat_vis_udp_port);
+}
+
+void reg_handoff_bat_vis(void)
+{
+	static gboolean inited = FALSE;
+	static dissector_handle_t vis_handle;
+
+	if (!inited) {
+		vis_handle = create_dissector_handle(dissect_bat_vis, proto_bat_plugin);
+		data_handle = find_dissector("data");
+	} else {
+		dissector_delete("udp.port", udp_port, vis_handle);
+	}
+
+	udp_port = global_bat_vis_udp_port;
+	dissector_add("udp.port", udp_port, vis_handle);
+}
+
+static void dissect_bat_vis(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+	guint8 version;
+
+	/* set protocol name */
+	if (check_col(pinfo->cinfo, COL_PROTOCOL)) {
+		col_set_str(pinfo->cinfo, COL_PROTOCOL, "BAT_VIS");
+	}
+
+	version = tvb_get_guint8(tvb, 4);
+	switch (version) {
+	case 22:
+		dissect_bat_vis_v22(tvb, pinfo, tree);
+		break;
+	case 23:
+		dissect_bat_vis_v23(tvb, pinfo, tree);
+		break;
+	default:
+		if (check_col(pinfo->cinfo, COL_INFO)) {
+			col_clear(pinfo->cinfo, COL_INFO);
+			col_append_fstr(pinfo->cinfo, COL_INFO, "Unsupported Version %d", version);
+		}
+		call_dissector(data_handle, tvb, pinfo, tree);
+	}
+}
+
+static void dissect_bat_vis_v22(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+	struct vis_packet_v22 *vis_packeth;
+	const guint8  *sender_ip_addr;
+	guint32 sender_ip;
+	proto_tree *bat_vis_tree = NULL;
+
+	tvbuff_t *next_tvb;
+	guint length_remaining, i;
+	int offset = 0;
+
+	vis_packeth = ep_alloc(sizeof(struct vis_packet_v22));
+
+	sender_ip_addr = tvb_get_ptr(tvb, 0, 4);
+	sender_ip = tvb_get_ipv4(tvb, 0);
+	SET_ADDRESS(&vis_packeth->sender_ip, FT_IPv4, 4, sender_ip_addr);
+	vis_packeth->version = tvb_get_guint8(tvb, 4);
+	vis_packeth->gw_class = tvb_get_guint8(tvb, 5);
+	vis_packeth->tq_max = tvb_get_ntohs(tvb, 6);
+
+	/* set protocol name */
+	if (check_col(pinfo->cinfo, COL_PROTOCOL)) {
+		col_set_str(pinfo->cinfo, COL_PROTOCOL, "BAT_VIS");
+	}
+
+	/* Set info column */
+	if (check_col(pinfo->cinfo, COL_INFO)) {
+		col_clear(pinfo->cinfo, COL_INFO);
+		col_append_fstr(pinfo->cinfo, COL_INFO, "Src: %s (%s)",
+		                get_hostname(sender_ip), ip_to_str(vis_packeth->sender_ip.data));
+	}
+
+	/* Set tree info */
+	if (tree) {
+		proto_item *ti = NULL;
+
+		if (PTREE_DATA(tree)->visible) {
+			ti = proto_tree_add_protocol_format(tree, proto_bat_plugin, tvb, 0, VIS_PACKET_V22_SIZE,
+			                                    "B.A.T.M.A.N. Vis, Src: %s (%s)",
+			                                    get_hostname(sender_ip), ip_to_str(vis_packeth->sender_ip.data));
+		} else {
+			ti = proto_tree_add_item(tree, proto_bat_plugin, tvb, 0, VIS_PACKET_V22_SIZE, FALSE);
+		}
+		bat_vis_tree = proto_item_add_subtree(ti, ett_bat_vis);
+
+		/* items */
+		proto_tree_add_ipv4(bat_vis_tree, hf_bat_vis_vis_orig, tvb, offset, 4, sender_ip);
+		offset += 4;
+
+		proto_tree_add_item(bat_vis_tree, hf_bat_vis_version, tvb, offset, 1, FALSE);
+		offset += 1;
+
+		proto_tree_add_item(bat_vis_tree, hf_bat_vis_gwflags, tvb, offset, 1, FALSE);
+		offset += 1;
+
+		proto_tree_add_item(bat_vis_tree, hf_bat_max_tq_v22, tvb, offset, 2, FALSE);
+		offset += 2;
+	}
+
+	tap_queue_packet(bat_tap, pinfo, vis_packeth);
+
+	length_remaining = tvb_length_remaining(tvb, offset);
+
+	for (i = 0; i < length_remaining; i += VIS_PACKET_V22_DATA_SIZE) {
+		next_tvb = tvb_new_subset(tvb, offset, VIS_PACKET_V22_DATA_SIZE, VIS_PACKET_V22_DATA_SIZE);
+
+		if (have_tap_listener(bat_follow_tap)) {
+			tap_queue_packet(bat_follow_tap, pinfo, next_tvb);
+		}
+
+		if (bat_vis_tree != NULL) {
+			dissect_vis_entry_v22(next_tvb, pinfo, tree);
+		}
+
+		offset += VIS_PACKET_V22_DATA_SIZE;
+	}
+
+	length_remaining = tvb_length_remaining(tvb, offset);
+	if (length_remaining != 0) {
+		next_tvb = tvb_new_subset(tvb, offset, length_remaining, length_remaining);
+
+		if (have_tap_listener(bat_follow_tap)) {
+			tap_queue_packet(bat_follow_tap, pinfo, next_tvb);
+		}
+
+		call_dissector(data_handle, next_tvb, pinfo, tree);
+	}
+}
+
+static void dissect_vis_entry_v22(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
+{
+	struct vis_data_v22 *vis_datah;
+	const guint8  *ip_addr;
+	guint32 ip;
+
+	vis_datah = ep_alloc(sizeof(struct vis_data_v22));
+	vis_datah->type = tvb_get_guint8(tvb, 0);
+	vis_datah->data = tvb_get_ntohs(tvb, 1);
+	ip_addr = tvb_get_ptr(tvb, 3, 4);
+	ip = tvb_get_ipv4(tvb, 3);
+	SET_ADDRESS(&vis_datah->ip, FT_IPv4, 4, ip_addr);
+
+
+	/* Set tree info */
+	if (tree) {
+		proto_item *ti = NULL;
+		proto_tree *bat_vis_entry_tree = NULL;
+
+		if (PTREE_DATA(tree)->visible) {
+			ti = proto_tree_add_protocol_format(tree, proto_bat_plugin, tvb, 0, 7,
+			                                    "VIS Entry: [%s] %s (%s)",
+			                                    val_to_str(vis_datah->type, packettypenames, "Unknown (0x%02x)"),
+			                                    get_hostname(ip), ip_to_str(vis_datah->ip.data));
+		} else {
+			ti = proto_tree_add_item(tree, proto_bat_plugin, tvb, 0, 7, FALSE);
+		}
+		bat_vis_entry_tree = proto_item_add_subtree(ti, ett_bat_vis_entry);
+
+		proto_tree_add_item(bat_vis_entry_tree, hf_bat_vis_data_type, tvb, 0, 1, FALSE);
+
+		switch (vis_datah->type) {
+		case DATA_TYPE_NEIGH:
+			proto_tree_add_item(bat_vis_entry_tree, hf_bat_vis_tq_v22, tvb, 1, 2, FALSE);
+			break;
+		case DATA_TYPE_HNA:
+			proto_tree_add_item(bat_vis_entry_tree, hf_bat_vis_netmask, tvb, 1, 1, FALSE);
+			break;
+		case DATA_TYPE_SEC_IF:
+		default: {
+			;
+		}
+		};
+		proto_tree_add_ipv4(bat_vis_entry_tree, hf_bat_vis_data_ip, tvb, 3, 4,  ip);
+	}
+}
+
+static void dissect_bat_vis_v23(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+	struct vis_packet_v23 *vis_packeth;
+	const guint8  *sender_ip_addr;
+	guint32 sender_ip;
+	proto_tree *bat_vis_tree = NULL;
+
+	tvbuff_t *next_tvb;
+	guint length_remaining, i;
+	int offset = 0;
+
+	vis_packeth = ep_alloc(sizeof(struct vis_packet_v23));
+
+	sender_ip_addr = tvb_get_ptr(tvb, 0, 4);
+	sender_ip = tvb_get_ipv4(tvb, 0);
+	SET_ADDRESS(&vis_packeth->sender_ip, FT_IPv4, 4, sender_ip_addr);
+	vis_packeth->version = tvb_get_guint8(tvb, 4);
+	vis_packeth->gw_class = tvb_get_guint8(tvb, 5);
+	vis_packeth->tq_max = tvb_get_guint8(tvb, 6);
+
+	/* set protocol name */
+	if (check_col(pinfo->cinfo, COL_PROTOCOL)) {
+		col_set_str(pinfo->cinfo, COL_PROTOCOL, "BAT_VIS");
+	}
+
+	/* Set info column */
+	if (check_col(pinfo->cinfo, COL_INFO)) {
+		col_clear(pinfo->cinfo, COL_INFO);
+		col_append_fstr(pinfo->cinfo, COL_INFO, "Src: %s (%s)",
+		                get_hostname(sender_ip), ip_to_str(vis_packeth->sender_ip.data));
+	}
+
+	/* Set tree info */
+	if (tree) {
+		proto_item *ti = NULL;
+
+		if (PTREE_DATA(tree)->visible) {
+			ti = proto_tree_add_protocol_format(tree, proto_bat_plugin, tvb, 0, VIS_PACKET_V23_SIZE,
+			                                    "B.A.T.M.A.N. Vis, Src: %s (%s)",
+			                                    get_hostname(sender_ip), ip_to_str(vis_packeth->sender_ip.data));
+		} else {
+			ti = proto_tree_add_item(tree, proto_bat_plugin, tvb, 0, VIS_PACKET_V23_SIZE, FALSE);
+		}
+		bat_vis_tree = proto_item_add_subtree(ti, ett_bat_vis);
+
+		/* items */
+		proto_tree_add_ipv4(bat_vis_tree, hf_bat_vis_vis_orig, tvb, offset, 4, sender_ip);
+		offset += 4;
+
+		proto_tree_add_item(bat_vis_tree, hf_bat_vis_version, tvb, offset, 1, FALSE);
+		offset += 1;
+
+		proto_tree_add_item(bat_vis_tree, hf_bat_vis_gwflags, tvb, offset, 1, FALSE);
+		offset += 1;
+
+		proto_tree_add_item(bat_vis_tree, hf_bat_max_tq_v23, tvb, offset, 1, FALSE);
+		offset += 1;
+	}
+
+	tap_queue_packet(bat_tap, pinfo, vis_packeth);
+
+	length_remaining = tvb_length_remaining(tvb, offset);
+
+	for (i = 0; i < length_remaining; i += VIS_PACKET_V23_DATA_SIZE) {
+		next_tvb = tvb_new_subset(tvb, offset, VIS_PACKET_V23_DATA_SIZE, VIS_PACKET_V23_DATA_SIZE);
+
+		if (have_tap_listener(bat_follow_tap)) {
+			tap_queue_packet(bat_follow_tap, pinfo, next_tvb);
+		}
+
+		if (bat_vis_tree != NULL) {
+			dissect_vis_entry_v23(next_tvb, pinfo, tree);
+		}
+
+		offset += VIS_PACKET_V23_DATA_SIZE;
+	}
+
+	length_remaining = tvb_length_remaining(tvb, offset);
+	if (length_remaining != 0) {
+		next_tvb = tvb_new_subset(tvb, offset, length_remaining, length_remaining);
+
+		if (have_tap_listener(bat_follow_tap)) {
+			tap_queue_packet(bat_follow_tap, pinfo, next_tvb);
+		}
+
+		call_dissector(data_handle, next_tvb, pinfo, tree);
+	}
+}
+
+static void dissect_vis_entry_v23(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
+{
+	struct vis_data_v23 *vis_datah;
+	const guint8  *ip_addr;
+	guint32 ip;
+
+	vis_datah = ep_alloc(sizeof(struct vis_data_v23));
+	vis_datah->type = tvb_get_guint8(tvb, 0);
+	vis_datah->data = tvb_get_guint8(tvb, 1);
+	ip_addr = tvb_get_ptr(tvb, 2, 4);
+	ip = tvb_get_ipv4(tvb, 2);
+	SET_ADDRESS(&vis_datah->ip, FT_IPv4, 4, ip_addr);
+
+
+	/* Set tree info */
+	if (tree) {
+		proto_item *ti = NULL;
+		proto_tree *bat_vis_entry_tree = NULL;
+
+		if (PTREE_DATA(tree)->visible) {
+			ti = proto_tree_add_protocol_format(tree, proto_bat_plugin, tvb, 0, 7,
+			                                    "VIS Entry: [%s] %s (%s)",
+			                                    val_to_str(vis_datah->type, packettypenames, "Unknown (0x%02x)"),
+			                                    get_hostname(ip), ip_to_str(vis_datah->ip.data));
+		} else {
+			ti = proto_tree_add_item(tree, proto_bat_plugin, tvb, 0, 7, FALSE);
+		}
+		bat_vis_entry_tree = proto_item_add_subtree(ti, ett_bat_vis_entry);
+
+		proto_tree_add_item(bat_vis_entry_tree, hf_bat_vis_data_type, tvb, 0, 1, FALSE);
+
+		switch (vis_datah->type) {
+		case DATA_TYPE_NEIGH:
+			proto_tree_add_item(bat_vis_entry_tree, hf_bat_vis_tq_v23, tvb, 1, 1, FALSE);
+			break;
+		case DATA_TYPE_HNA:
+			proto_tree_add_item(bat_vis_entry_tree, hf_bat_vis_netmask, tvb, 1, 1, FALSE);
+			break;
+		case DATA_TYPE_SEC_IF:
+		default: {
+			;
+		}
+		};
+		proto_tree_add_ipv4(bat_vis_entry_tree, hf_bat_vis_data_ip, tvb, 2, 4,  ip);
+	}
+}