445 lines
13 KiB
C
445 lines
13 KiB
C
/* packet-bat-vis.c
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* Routines for B.A.T.M.A.N. Layer 3 dissection
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* Copyright 2008, Sven Eckelmann <sven.eckelmann@gmx.de>
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "packet-bat.h"
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#include <epan/addr_resolv.h>
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static gint ett_bat_vis = -1;
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static gint ett_bat_vis_entry = -1;
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static dissector_handle_t data_handle;
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static int hf_bat_vis_vis_orig = -1;
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static int hf_bat_vis_version = -1;
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static int hf_bat_vis_gwflags = -1;
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static int hf_bat_max_tq_v22 = -1;
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static int hf_bat_max_tq_v23 = -1;
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static int hf_bat_vis_data_type = -1;
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static int hf_bat_vis_netmask = -1;
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static int hf_bat_vis_tq_v22 = -1;
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static int hf_bat_vis_tq_v23 = -1;
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static int hf_bat_vis_data_ip = -1;
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static guint global_bat_vis_udp_port = BAT_VIS_PORT;
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static guint udp_port = 0;
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static void dissect_vis_entry_v22(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
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static void dissect_bat_vis_v22(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
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static void dissect_vis_entry_v23(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
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static void dissect_bat_vis_v23(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
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static void dissect_bat_vis(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
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static const value_string packettypenames[] = {
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{ DATA_TYPE_NEIGH, "NEIGH" },
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{ DATA_TYPE_SEC_IF, "SEC_IF" },
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{ DATA_TYPE_HNA, "HNA" },
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{ 0, NULL }
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};
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void register_bat_vis(void)
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{
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static hf_register_info hf[] = {
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{ &hf_bat_vis_vis_orig,
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{ "Originator", "bat.vis.sender_ip",
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FT_IPv4, BASE_NONE, NULL, 0x0,
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"", HFILL }
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},
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{ &hf_bat_vis_version,
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{ "Version", "bat.vis.version",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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"", HFILL }
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},
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{ &hf_bat_vis_gwflags,
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{ "Gateway Flags", "bat.vis.gwflags",
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FT_UINT8, BASE_HEX, NULL, 0x0,
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"", HFILL }
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},
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{ &hf_bat_max_tq_v22,
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{ "Maximum Transmission Quality", "bat.vis.tq_max",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"", HFILL }
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},
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{ &hf_bat_max_tq_v23,
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{ "Maximum Transmission Quality", "bat.vis.tq_max",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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"", HFILL }
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},
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{ &hf_bat_vis_data_type,
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{ "Type", "bat.vis.data_type",
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FT_UINT8, BASE_DEC, VALS(packettypenames), 0x0,
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"", HFILL }
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},
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{ &hf_bat_vis_tq_v22,
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{ "Transmission Quality", "bat.vis.tq",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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"", HFILL}
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},
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{ &hf_bat_vis_tq_v23,
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{ "Transmission Quality", "bat.vis.tq",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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"", HFILL}
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},
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{ &hf_bat_vis_netmask,
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{ "Netmask", "bat.vis.netmask",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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"", HFILL}
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},
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{ &hf_bat_vis_data_ip,
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{ "IP", "bat.vis.data_ip",
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FT_IPv4, BASE_NONE, NULL, 0x0,
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"", HFILL }
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}
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};
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/* Setup protocol subtree array */
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static gint *ett[] = {
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&ett_bat_vis,
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&ett_bat_vis_entry
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};
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proto_register_subtree_array(ett, array_length(ett));
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proto_register_field_array(proto_bat_plugin, hf, array_length(hf));
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prefs_register_uint_preference(bat_module, "batman.vis.port", "VIS UDP Port",
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"Set the port for B.A.T.M.A.N. VIS "
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"messages (if other than the default of 4307)",
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10, &global_bat_vis_udp_port);
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}
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void reg_handoff_bat_vis(void)
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{
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static gboolean inited = FALSE;
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static dissector_handle_t vis_handle;
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if (!inited) {
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vis_handle = create_dissector_handle(dissect_bat_vis, proto_bat_plugin);
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data_handle = find_dissector("data");
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inited = TRUE;
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} else {
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dissector_delete("udp.port", udp_port, vis_handle);
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}
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udp_port = global_bat_vis_udp_port;
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dissector_add("udp.port", udp_port, vis_handle);
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}
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static void dissect_bat_vis(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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guint8 version;
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/* set protocol name */
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if (check_col(pinfo->cinfo, COL_PROTOCOL)) {
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "BAT_VIS");
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}
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version = tvb_get_guint8(tvb, 4);
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switch (version) {
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case 22:
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dissect_bat_vis_v22(tvb, pinfo, tree);
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break;
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case 23:
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dissect_bat_vis_v23(tvb, pinfo, tree);
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break;
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default:
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_clear(pinfo->cinfo, COL_INFO);
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col_append_fstr(pinfo->cinfo, COL_INFO, "Unsupported Version %d", version);
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}
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call_dissector(data_handle, tvb, pinfo, tree);
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break;
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}
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}
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static void dissect_bat_vis_v22(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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struct vis_packet_v22 *vis_packeth;
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const guint8 *sender_ip_addr;
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guint32 sender_ip;
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proto_tree *bat_vis_tree = NULL;
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tvbuff_t *next_tvb;
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guint length_remaining, i;
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int offset = 0;
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vis_packeth = ep_alloc(sizeof(struct vis_packet_v22));
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sender_ip_addr = tvb_get_ptr(tvb, 0, 4);
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sender_ip = tvb_get_ipv4(tvb, 0);
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SET_ADDRESS(&vis_packeth->sender_ip, AT_IPv4, 4, sender_ip_addr);
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vis_packeth->version = tvb_get_guint8(tvb, 4);
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vis_packeth->gw_class = tvb_get_guint8(tvb, 5);
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vis_packeth->tq_max = tvb_get_ntohs(tvb, 6);
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/* set protocol name */
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if (check_col(pinfo->cinfo, COL_PROTOCOL)) {
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "BAT_VIS");
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}
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/* Set info column */
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_clear(pinfo->cinfo, COL_INFO);
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col_append_fstr(pinfo->cinfo, COL_INFO, "Src: %s (%s)",
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get_hostname(sender_ip), ip_to_str(vis_packeth->sender_ip.data));
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}
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/* Set tree info */
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if (tree) {
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proto_item *ti = NULL;
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if (PTREE_DATA(tree)->visible) {
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ti = proto_tree_add_protocol_format(tree, proto_bat_plugin, tvb, 0, VIS_PACKET_V22_SIZE,
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"B.A.T.M.A.N. Vis, Src: %s (%s)",
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get_hostname(sender_ip), ip_to_str(vis_packeth->sender_ip.data));
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} else {
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ti = proto_tree_add_item(tree, proto_bat_plugin, tvb, 0, VIS_PACKET_V22_SIZE, FALSE);
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}
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bat_vis_tree = proto_item_add_subtree(ti, ett_bat_vis);
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/* items */
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proto_tree_add_ipv4(bat_vis_tree, hf_bat_vis_vis_orig, tvb, offset, 4, sender_ip);
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offset += 4;
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proto_tree_add_item(bat_vis_tree, hf_bat_vis_version, tvb, offset, 1, FALSE);
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offset += 1;
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proto_tree_add_item(bat_vis_tree, hf_bat_vis_gwflags, tvb, offset, 1, FALSE);
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offset += 1;
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proto_tree_add_item(bat_vis_tree, hf_bat_max_tq_v22, tvb, offset, 2, FALSE);
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offset += 2;
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}
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tap_queue_packet(bat_tap, pinfo, vis_packeth);
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length_remaining = tvb_length_remaining(tvb, offset);
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for (i = 0; i < length_remaining; i += VIS_PACKET_V22_DATA_SIZE) {
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next_tvb = tvb_new_subset(tvb, offset, VIS_PACKET_V22_DATA_SIZE, VIS_PACKET_V22_DATA_SIZE);
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if (have_tap_listener(bat_follow_tap)) {
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tap_queue_packet(bat_follow_tap, pinfo, next_tvb);
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}
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if (bat_vis_tree != NULL) {
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dissect_vis_entry_v22(next_tvb, pinfo, tree);
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}
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offset += VIS_PACKET_V22_DATA_SIZE;
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}
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length_remaining = tvb_length_remaining(tvb, offset);
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if (length_remaining != 0) {
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next_tvb = tvb_new_subset(tvb, offset, length_remaining, length_remaining);
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if (have_tap_listener(bat_follow_tap)) {
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tap_queue_packet(bat_follow_tap, pinfo, next_tvb);
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}
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call_dissector(data_handle, next_tvb, pinfo, tree);
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}
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}
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static void dissect_vis_entry_v22(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
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{
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struct vis_data_v22 *vis_datah;
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const guint8 *ip_addr;
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guint32 ip;
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vis_datah = ep_alloc(sizeof(struct vis_data_v22));
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vis_datah->type = tvb_get_guint8(tvb, 0);
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vis_datah->data = tvb_get_ntohs(tvb, 1);
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ip_addr = tvb_get_ptr(tvb, 3, 4);
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ip = tvb_get_ipv4(tvb, 3);
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SET_ADDRESS(&vis_datah->ip, AT_IPv4, 4, ip_addr);
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/* Set tree info */
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if (tree) {
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proto_item *ti = NULL;
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proto_tree *bat_vis_entry_tree = NULL;
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if (PTREE_DATA(tree)->visible) {
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ti = proto_tree_add_protocol_format(tree, proto_bat_plugin, tvb, 0, 7,
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"VIS Entry: [%s] %s (%s)",
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val_to_str(vis_datah->type, packettypenames, "Unknown (0x%02x)"),
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get_hostname(ip), ip_to_str(vis_datah->ip.data));
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} else {
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ti = proto_tree_add_item(tree, proto_bat_plugin, tvb, 0, 7, FALSE);
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}
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bat_vis_entry_tree = proto_item_add_subtree(ti, ett_bat_vis_entry);
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proto_tree_add_item(bat_vis_entry_tree, hf_bat_vis_data_type, tvb, 0, 1, FALSE);
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switch (vis_datah->type) {
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case DATA_TYPE_NEIGH:
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proto_tree_add_item(bat_vis_entry_tree, hf_bat_vis_tq_v22, tvb, 1, 2, FALSE);
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break;
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case DATA_TYPE_HNA:
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proto_tree_add_item(bat_vis_entry_tree, hf_bat_vis_netmask, tvb, 1, 1, FALSE);
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break;
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case DATA_TYPE_SEC_IF:
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default:
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break;
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}
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proto_tree_add_ipv4(bat_vis_entry_tree, hf_bat_vis_data_ip, tvb, 3, 4, ip);
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}
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}
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static void dissect_bat_vis_v23(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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struct vis_packet_v23 *vis_packeth;
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const guint8 *sender_ip_addr;
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guint32 sender_ip;
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proto_tree *bat_vis_tree = NULL;
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tvbuff_t *next_tvb;
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guint length_remaining, i;
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int offset = 0;
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vis_packeth = ep_alloc(sizeof(struct vis_packet_v23));
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sender_ip_addr = tvb_get_ptr(tvb, 0, 4);
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sender_ip = tvb_get_ipv4(tvb, 0);
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SET_ADDRESS(&vis_packeth->sender_ip, AT_IPv4, 4, sender_ip_addr);
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vis_packeth->version = tvb_get_guint8(tvb, 4);
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vis_packeth->gw_class = tvb_get_guint8(tvb, 5);
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vis_packeth->tq_max = tvb_get_guint8(tvb, 6);
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/* set protocol name */
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if (check_col(pinfo->cinfo, COL_PROTOCOL)) {
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "BAT_VIS");
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}
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/* Set info column */
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if (check_col(pinfo->cinfo, COL_INFO)) {
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col_clear(pinfo->cinfo, COL_INFO);
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col_append_fstr(pinfo->cinfo, COL_INFO, "Src: %s (%s)",
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get_hostname(sender_ip), ip_to_str(vis_packeth->sender_ip.data));
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}
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/* Set tree info */
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if (tree) {
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proto_item *ti = NULL;
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if (PTREE_DATA(tree)->visible) {
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ti = proto_tree_add_protocol_format(tree, proto_bat_plugin, tvb, 0, VIS_PACKET_V23_SIZE,
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"B.A.T.M.A.N. Vis, Src: %s (%s)",
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get_hostname(sender_ip), ip_to_str(vis_packeth->sender_ip.data));
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} else {
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ti = proto_tree_add_item(tree, proto_bat_plugin, tvb, 0, VIS_PACKET_V23_SIZE, FALSE);
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}
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bat_vis_tree = proto_item_add_subtree(ti, ett_bat_vis);
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/* items */
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proto_tree_add_ipv4(bat_vis_tree, hf_bat_vis_vis_orig, tvb, offset, 4, sender_ip);
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offset += 4;
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proto_tree_add_item(bat_vis_tree, hf_bat_vis_version, tvb, offset, 1, FALSE);
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offset += 1;
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proto_tree_add_item(bat_vis_tree, hf_bat_vis_gwflags, tvb, offset, 1, FALSE);
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offset += 1;
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proto_tree_add_item(bat_vis_tree, hf_bat_max_tq_v23, tvb, offset, 1, FALSE);
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offset += 1;
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}
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tap_queue_packet(bat_tap, pinfo, vis_packeth);
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length_remaining = tvb_length_remaining(tvb, offset);
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for (i = 0; i < length_remaining; i += VIS_PACKET_V23_DATA_SIZE) {
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next_tvb = tvb_new_subset(tvb, offset, VIS_PACKET_V23_DATA_SIZE, VIS_PACKET_V23_DATA_SIZE);
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if (have_tap_listener(bat_follow_tap)) {
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tap_queue_packet(bat_follow_tap, pinfo, next_tvb);
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}
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if (bat_vis_tree != NULL) {
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dissect_vis_entry_v23(next_tvb, pinfo, tree);
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}
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offset += VIS_PACKET_V23_DATA_SIZE;
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}
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length_remaining = tvb_length_remaining(tvb, offset);
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if (length_remaining != 0) {
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next_tvb = tvb_new_subset(tvb, offset, length_remaining, length_remaining);
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if (have_tap_listener(bat_follow_tap)) {
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tap_queue_packet(bat_follow_tap, pinfo, next_tvb);
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}
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call_dissector(data_handle, next_tvb, pinfo, tree);
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}
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}
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static void dissect_vis_entry_v23(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
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{
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struct vis_data_v23 *vis_datah;
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const guint8 *ip_addr;
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guint32 ip;
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vis_datah = ep_alloc(sizeof(struct vis_data_v23));
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vis_datah->type = tvb_get_guint8(tvb, 0);
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vis_datah->data = tvb_get_guint8(tvb, 1);
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ip_addr = tvb_get_ptr(tvb, 2, 4);
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ip = tvb_get_ipv4(tvb, 2);
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SET_ADDRESS(&vis_datah->ip, AT_IPv4, 4, ip_addr);
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/* Set tree info */
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if (tree) {
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proto_item *ti = NULL;
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proto_tree *bat_vis_entry_tree = NULL;
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if (PTREE_DATA(tree)->visible) {
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ti = proto_tree_add_protocol_format(tree, proto_bat_plugin, tvb, 0, 7,
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"VIS Entry: [%s] %s (%s)",
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val_to_str(vis_datah->type, packettypenames, "Unknown (0x%02x)"),
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get_hostname(ip), ip_to_str(vis_datah->ip.data));
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} else {
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ti = proto_tree_add_item(tree, proto_bat_plugin, tvb, 0, 7, FALSE);
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}
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bat_vis_entry_tree = proto_item_add_subtree(ti, ett_bat_vis_entry);
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proto_tree_add_item(bat_vis_entry_tree, hf_bat_vis_data_type, tvb, 0, 1, FALSE);
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switch (vis_datah->type) {
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case DATA_TYPE_NEIGH:
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proto_tree_add_item(bat_vis_entry_tree, hf_bat_vis_tq_v23, tvb, 1, 1, FALSE);
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|
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:
|
|
break;
|
|
}
|
|
proto_tree_add_ipv4(bat_vis_entry_tree, hf_bat_vis_data_ip, tvb, 2, 4, ip);
|
|
}
|
|
}
|