866 lines
24 KiB
C
866 lines
24 KiB
C
/* packet-bat.c
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* Routines for B.A.T.M.A.N. Layer 3 dissection
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* Copyright 2008-2010 Sven Eckelmann <sven@narfation.org>
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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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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/tap.h>
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#include <epan/addr_resolv.h>
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void proto_register_bat(void);
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void proto_reg_handoff_bat(void);
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#define BAT_BATMAN_PORT 4305
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#define BAT_GW_PORT 4306 /* Not IANA registered */
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#define BAT_VIS_PORT 4307 /* Not IANA registered */
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#define UNIDIRECTIONAL 0x80
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#define DIRECTLINK 0x40
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struct batman_packet_v5 {
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guint8 version; /* batman version field */
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guint8 flags; /* 0x80: UNIDIRECTIONAL link, 0x40: DIRECTLINK flag, ... */
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guint8 ttl;
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guint8 gwflags; /* flags related to gateway functions: gateway class */
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guint16 seqno;
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guint16 gwport;
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address orig;
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address old_orig;
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guint8 tq;
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guint8 hna_len;
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};
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#define BATMAN_PACKET_V5_SIZE 18
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struct gw_packet {
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guint8 type;
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};
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#define GW_PACKET_SIZE 1
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#define TUNNEL_DATA 0x01
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#define TUNNEL_IP_REQUEST 0x02
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#define TUNNEL_IP_INVALID 0x03
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#define TUNNEL_KEEPALIVE_REQUEST 0x04
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#define TUNNEL_KEEPALIVE_REPLY 0x05
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#define DATA_TYPE_NEIGH 1
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#define DATA_TYPE_SEC_IF 2
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#define DATA_TYPE_HNA 3
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struct vis_packet_v22 {
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address sender_ip;
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guint8 version;
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guint8 gw_class;
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guint16 tq_max;
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};
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#define VIS_PACKET_V22_SIZE 8
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struct vis_data_v22 {
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guint8 type;
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guint16 data;
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address ip;
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};
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#define VIS_PACKET_V22_DATA_SIZE 7
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struct vis_packet_v23 {
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address sender_ip;
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guint8 version;
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guint8 gw_class;
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guint8 tq_max;
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};
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#define VIS_PACKET_V23_SIZE 7
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struct vis_data_v23 {
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guint8 type;
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guint8 data;
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address ip;
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};
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#define VIS_PACKET_V23_DATA_SIZE 6
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/* End content from packet-bat.h */
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/* trees */
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static gint ett_bat_batman = -1;
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static gint ett_bat_batman_flags = -1;
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static gint ett_bat_batman_gwflags = -1;
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static gint ett_bat_batman_hna = -1;
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static gint ett_bat_gw = -1;
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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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/* hfs */
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static int hf_bat_batman_version = -1;
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static int hf_bat_batman_flags = -1;
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static int hf_bat_batman_ttl = -1;
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static int hf_bat_batman_gwflags = -1;
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static int hf_bat_batman_gwflags_dl_speed = -1;
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static int hf_bat_batman_gwflags_ul_speed = -1;
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static int hf_bat_batman_seqno = -1;
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static int hf_bat_batman_gwport = -1;
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static int hf_bat_batman_orig = -1;
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static int hf_bat_batman_old_orig = -1;
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static int hf_bat_batman_tq = -1;
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static int hf_bat_batman_hna_len = -1;
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static int hf_bat_batman_hna_network = -1;
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static int hf_bat_batman_hna_netmask = -1;
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static int hf_bat_gw_type = -1;
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static int hf_bat_gw_ip = -1;
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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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/* flags */
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static int hf_bat_batman_flags_unidirectional = -1;
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static int hf_bat_batman_flags_directlink = -1;
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static const value_string gw_packettypenames[] = {
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{ TUNNEL_DATA, "DATA" },
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{ TUNNEL_IP_REQUEST, "IP_REQUEST" },
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{ TUNNEL_IP_INVALID, "IP_INVALID" },
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{ TUNNEL_KEEPALIVE_REQUEST, "KEEPALIVE_REQUEST" },
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{ TUNNEL_KEEPALIVE_REPLY, "KEEPALIVE_REPLY" },
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{ 0, NULL }
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};
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static const value_string vis_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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/* supported packet dissectors */
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static int dissect_bat_batman_v5(tvbuff_t *tvb, int offset, 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_v22(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_vis_entry_v23(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
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static void dissect_bat_hna(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
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/* other dissectors */
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static dissector_handle_t ip_handle;
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static int proto_bat_plugin = -1;
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static int proto_bat_gw = -1;
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static int proto_bat_vis = -1;
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/* tap */
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static int bat_tap = -1;
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static int bat_follow_tap = -1;
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static int dissect_bat_batman(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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guint8 version;
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int offset = 0;
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/* set protocol name */
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "BAT_BATMAN");
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col_clear(pinfo->cinfo, COL_INFO);
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version = tvb_get_guint8(tvb, 0);
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switch (version) {
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case 5:
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while (tvb_reported_length_remaining(tvb, offset) > 0) {
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offset = dissect_bat_batman_v5(tvb, offset, pinfo, tree);
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}
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break;
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default:
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col_add_fstr(pinfo->cinfo, COL_INFO, "Unsupported Version %d", version);
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call_data_dissector(tvb, pinfo, tree);
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break;
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}
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return tvb_captured_length(tvb);
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}
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static void dissect_bat_gwflags(tvbuff_t *tvb, guint8 gwflags, int offset, proto_item *tgw)
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{
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proto_tree *gwflags_tree;
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guint8 s = (gwflags & 0x80) >> 7;
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guint8 downbits = (gwflags & 0x78) >> 3;
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guint8 upbits = (gwflags & 0x07);
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guint down, up;
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down = 32 * (s + 2) * (1 << downbits);
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up = ((upbits + 1) * down) / 8;
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gwflags_tree = proto_item_add_subtree(tgw, ett_bat_batman_gwflags);
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proto_tree_add_uint(gwflags_tree, hf_bat_batman_gwflags_dl_speed, tvb, offset, 1, down);
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proto_tree_add_uint(gwflags_tree, hf_bat_batman_gwflags_ul_speed, tvb, offset, 1, up);
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}
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static int dissect_bat_batman_v5(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree)
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{
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proto_item *tgw;
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proto_tree *bat_batman_tree = NULL;
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struct batman_packet_v5 *batman_packeth;
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guint32 old_orig, orig;
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gint i;
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static int * const batman_flags[] = {
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&hf_bat_batman_flags_unidirectional,
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&hf_bat_batman_flags_directlink,
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NULL
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};
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tvbuff_t *next_tvb;
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batman_packeth = wmem_new(pinfo->pool, struct batman_packet_v5);
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batman_packeth->version = tvb_get_guint8(tvb, offset+0);
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batman_packeth->flags = tvb_get_guint8(tvb, offset+1);
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batman_packeth->ttl = tvb_get_guint8(tvb, offset+2);
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batman_packeth->gwflags = tvb_get_guint8(tvb, offset+3);
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batman_packeth->seqno = tvb_get_ntohs(tvb, offset+4);
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batman_packeth->gwport = tvb_get_ntohs(tvb, offset+6);
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orig = tvb_get_ipv4(tvb, offset+8);
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set_address_tvb(&batman_packeth->orig, AT_IPv4, 4, tvb, offset+8);
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old_orig = tvb_get_ipv4(tvb, offset+12);
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set_address_tvb(&batman_packeth->old_orig, AT_IPv4, 4, tvb, offset+12);
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batman_packeth->tq = tvb_get_guint8(tvb, offset+16);
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batman_packeth->hna_len = tvb_get_guint8(tvb, offset+17);
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/* Set info column */
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col_add_fstr(pinfo->cinfo, COL_INFO, "Seq=%u", batman_packeth->seqno);
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/* Set tree info */
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if (tree) {
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proto_item *ti;
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ti = proto_tree_add_protocol_format(tree, proto_bat_plugin, tvb, offset, BATMAN_PACKET_V5_SIZE,
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"B.A.T.M.A.N., Orig: %s",
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address_with_resolution_to_str(pinfo->pool, &batman_packeth->orig));
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bat_batman_tree = proto_item_add_subtree(ti, ett_bat_batman);
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}
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/* items */
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proto_tree_add_item(bat_batman_tree, hf_bat_batman_version, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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proto_tree_add_bitmask(bat_batman_tree, tvb, offset, hf_bat_batman_flags,
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ett_bat_batman_flags, batman_flags, ENC_NA);
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offset += 1;
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proto_tree_add_item(bat_batman_tree, hf_bat_batman_ttl, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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tgw = proto_tree_add_item(bat_batman_tree, hf_bat_batman_gwflags, tvb, offset, 1, ENC_BIG_ENDIAN);
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dissect_bat_gwflags(tvb, batman_packeth->gwflags, offset, tgw);
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offset += 1;
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proto_tree_add_item(bat_batman_tree, hf_bat_batman_seqno, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_item(bat_batman_tree, hf_bat_batman_gwport, tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_ipv4(bat_batman_tree, hf_bat_batman_orig, tvb, offset, 4, orig);
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offset += 4;
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proto_tree_add_ipv4(bat_batman_tree, hf_bat_batman_old_orig, tvb, offset, 4, old_orig);
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offset += 4;
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proto_tree_add_item(bat_batman_tree, hf_bat_batman_tq, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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proto_tree_add_item(bat_batman_tree, hf_bat_batman_hna_len, tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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tap_queue_packet(bat_tap, pinfo, batman_packeth);
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for (i = 0; i < batman_packeth->hna_len; i++) {
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next_tvb = tvb_new_subset_length(tvb, offset, 5);
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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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dissect_bat_hna(next_tvb, pinfo, bat_batman_tree);
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offset += 5;
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}
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return offset;
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}
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static void dissect_bat_hna(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
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{
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guint32 hna;
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guint8 hna_netmask;
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hna = tvb_get_ipv4(tvb, 0);
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hna_netmask = tvb_get_guint8(tvb, 4);
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/* Set tree info */
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if (tree) {
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proto_item *ti;
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proto_tree *bat_batman_hna_tree;
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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, 5,
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"B.A.T.M.A.N. HNA: %s/%d",
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tvb_ip_to_str(pinfo->pool, tvb, 0), hna_netmask);
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} else {
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ti = proto_tree_add_item(tree, proto_bat_plugin, tvb, 0, 5, ENC_NA);
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}
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bat_batman_hna_tree = proto_item_add_subtree(ti, ett_bat_batman_hna);
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proto_tree_add_ipv4(bat_batman_hna_tree, hf_bat_batman_hna_network, tvb, 0, 4, hna);
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proto_tree_add_item(bat_batman_hna_tree, hf_bat_batman_hna_netmask, tvb, 4, 1, ENC_BIG_ENDIAN);
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}
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}
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static int dissect_bat_gw(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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struct gw_packet *gw_packeth;
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guint32 ip;
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int ip_pos;
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tvbuff_t *next_tvb;
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gint length_remaining;
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int offset = 0;
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gw_packeth = wmem_new(pinfo->pool, struct gw_packet);
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gw_packeth->type = tvb_get_guint8(tvb, 0);
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switch (gw_packeth->type) {
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case TUNNEL_IP_INVALID:
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ip_pos = 13;
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break;
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default:
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ip_pos = 1;
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}
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ip = tvb_get_ipv4(tvb, ip_pos);
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/* set protocol name */
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "BAT_GW");
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/* Set info column */
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col_add_fstr(pinfo->cinfo, COL_INFO, "Type=%s",
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val_to_str(gw_packeth->type, gw_packettypenames, "Unknown (0x%02x)"));
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if (ip != 0) {
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col_append_fstr(pinfo->cinfo, COL_INFO, " IP: %s",
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tvb_address_with_resolution_to_str(pinfo->pool, tvb, AT_IPv4, ip_pos));
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}
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/* Set tree info */
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if (tree) {
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proto_item *ti;
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proto_tree *bat_gw_entry_tree;
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ti = proto_tree_add_protocol_format(tree, proto_bat_gw, tvb, 0, 1,
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"B.A.T.M.A.N. GW [%s]",
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val_to_str(gw_packeth->type, gw_packettypenames, "Unknown (0x%02x)"));
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bat_gw_entry_tree = proto_item_add_subtree(ti, ett_bat_gw);
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proto_tree_add_item(bat_gw_entry_tree, hf_bat_gw_type, tvb, offset, 1, ENC_BIG_ENDIAN);
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/*offset += 1;*/
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if (gw_packeth->type != TUNNEL_DATA && ip != 0) {
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proto_tree_add_ipv4(bat_gw_entry_tree, hf_bat_gw_ip, tvb, ip_pos, 4, ip);
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/*offset = ip_pos + 4;*/
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}
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}
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/* Calculate offset even when we got no tree */
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offset = 1;
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if (gw_packeth->type != TUNNEL_DATA && ip != 0)
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offset = ip_pos + 4;
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length_remaining = tvb_reported_length_remaining(tvb, offset);
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if (length_remaining > 0) {
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next_tvb = tvb_new_subset_remaining(tvb, offset);
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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 (gw_packeth->type == TUNNEL_DATA) {
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call_dissector(ip_handle, next_tvb, pinfo, tree);
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} else {
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call_data_dissector(next_tvb, pinfo, tree);
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}
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}
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return tvb_captured_length(tvb);
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}
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static int dissect_bat_vis(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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guint8 version;
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/* set protocol name */
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "BAT_VIS");
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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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col_add_fstr(pinfo->cinfo, COL_INFO, "Unsupported Version %d", version);
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call_data_dissector(tvb, pinfo, tree);
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break;
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}
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return tvb_captured_length(tvb);
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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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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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gint length_remaining, i;
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int offset = 0;
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vis_packeth = wmem_new(pinfo->pool, struct vis_packet_v22);
|
|
|
|
sender_ip = tvb_get_ipv4(tvb, 0);
|
|
set_address_tvb(&vis_packeth->sender_ip, AT_IPv4, 4, tvb, 0);
|
|
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 */
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "BAT_VIS");
|
|
|
|
/* Set info column */
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "Src: %s",
|
|
address_with_resolution_to_str(pinfo->pool, &vis_packeth->sender_ip));
|
|
|
|
/* Set tree info */
|
|
if (tree) {
|
|
proto_item *ti;
|
|
|
|
ti = proto_tree_add_protocol_format(tree, proto_bat_vis, tvb, 0, VIS_PACKET_V22_SIZE,
|
|
"B.A.T.M.A.N. Vis, Src: %s",
|
|
address_with_resolution_to_str(pinfo->pool, &vis_packeth->sender_ip));
|
|
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, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
|
|
proto_tree_add_item(bat_vis_tree, hf_bat_vis_gwflags, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
|
|
proto_tree_add_item(bat_vis_tree, hf_bat_max_tq_v22, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
/*offset += 2;*/
|
|
}
|
|
|
|
/* Calculate offset even when we got no tree */
|
|
offset = VIS_PACKET_V22_SIZE;
|
|
|
|
tap_queue_packet(bat_tap, pinfo, vis_packeth);
|
|
|
|
length_remaining = tvb_reported_length_remaining(tvb, offset);
|
|
|
|
for (i = 0; i < length_remaining; i += VIS_PACKET_V22_DATA_SIZE) {
|
|
next_tvb = tvb_new_subset_length(tvb, offset, 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_reported_length_remaining(tvb, offset);
|
|
if (length_remaining > 0) {
|
|
next_tvb = tvb_new_subset_remaining(tvb, offset);
|
|
|
|
if (have_tap_listener(bat_follow_tap)) {
|
|
tap_queue_packet(bat_follow_tap, pinfo, next_tvb);
|
|
}
|
|
|
|
call_data_dissector(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;
|
|
guint32 ip;
|
|
|
|
vis_datah = wmem_new(pinfo->pool, struct vis_data_v22);
|
|
vis_datah->type = tvb_get_guint8(tvb, 0);
|
|
vis_datah->data = tvb_get_ntohs(tvb, 1);
|
|
ip = tvb_get_ipv4(tvb, 3);
|
|
set_address_tvb(&vis_datah->ip, AT_IPv4, 4, tvb, 3);
|
|
|
|
|
|
/* Set tree info */
|
|
if (tree) {
|
|
proto_item *ti;
|
|
proto_tree *bat_vis_entry_tree;
|
|
|
|
ti = proto_tree_add_protocol_format(tree, proto_bat_plugin, tvb, 0, 7,
|
|
"VIS Entry: [%s] %s",
|
|
val_to_str(vis_datah->type, vis_packettypenames, "Unknown (0x%02x)"),
|
|
address_with_resolution_to_str(pinfo->pool, &vis_datah->ip));
|
|
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, ENC_BIG_ENDIAN);
|
|
|
|
switch (vis_datah->type) {
|
|
case DATA_TYPE_NEIGH:
|
|
proto_tree_add_item(bat_vis_entry_tree, hf_bat_vis_tq_v22, tvb, 1, 2, ENC_BIG_ENDIAN);
|
|
break;
|
|
case DATA_TYPE_HNA:
|
|
proto_tree_add_item(bat_vis_entry_tree, hf_bat_vis_netmask, tvb, 1, 1, ENC_BIG_ENDIAN);
|
|
break;
|
|
case DATA_TYPE_SEC_IF:
|
|
default:
|
|
break;
|
|
}
|
|
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;
|
|
guint32 sender_ip;
|
|
proto_tree *bat_vis_tree = NULL;
|
|
|
|
tvbuff_t *next_tvb;
|
|
gint length_remaining, i;
|
|
int offset = 0;
|
|
|
|
vis_packeth = wmem_new(pinfo->pool, struct vis_packet_v23);
|
|
|
|
sender_ip = tvb_get_ipv4(tvb, 0);
|
|
set_address_tvb(&vis_packeth->sender_ip, AT_IPv4, 4, tvb, 0);
|
|
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 */
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "BAT_VIS");
|
|
|
|
/* Set info column */
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "Src: %s",
|
|
address_with_resolution_to_str(pinfo->pool, &vis_packeth->sender_ip));
|
|
|
|
/* Set tree info */
|
|
if (tree) {
|
|
proto_item *ti;
|
|
|
|
ti = proto_tree_add_protocol_format(tree, proto_bat_vis, tvb, 0, VIS_PACKET_V23_SIZE,
|
|
"B.A.T.M.A.N. Vis, Src: %s",
|
|
address_with_resolution_to_str(pinfo->pool, &vis_packeth->sender_ip));
|
|
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, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
|
|
proto_tree_add_item(bat_vis_tree, hf_bat_vis_gwflags, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
|
|
proto_tree_add_item(bat_vis_tree, hf_bat_max_tq_v23, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
/*offset += 1;*/
|
|
}
|
|
|
|
/* Calculate offset even when we got no tree */
|
|
offset = VIS_PACKET_V23_SIZE;
|
|
|
|
tap_queue_packet(bat_tap, pinfo, vis_packeth);
|
|
|
|
length_remaining = tvb_reported_length_remaining(tvb, offset);
|
|
|
|
for (i = 0; i < length_remaining; i += VIS_PACKET_V23_DATA_SIZE) {
|
|
next_tvb = tvb_new_subset_length(tvb, offset, 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_reported_length_remaining(tvb, offset);
|
|
if (length_remaining > 0) {
|
|
next_tvb = tvb_new_subset_remaining(tvb, offset);
|
|
|
|
if (have_tap_listener(bat_follow_tap)) {
|
|
tap_queue_packet(bat_follow_tap, pinfo, next_tvb);
|
|
}
|
|
|
|
call_data_dissector(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;
|
|
guint32 ip;
|
|
|
|
vis_datah = wmem_new(pinfo->pool, struct vis_data_v23);
|
|
vis_datah->type = tvb_get_guint8(tvb, 0);
|
|
vis_datah->data = tvb_get_guint8(tvb, 1);
|
|
ip = tvb_get_ipv4(tvb, 2);
|
|
set_address_tvb(&vis_datah->ip, AT_IPv4, 4, tvb, 2);
|
|
|
|
|
|
/* Set tree info */
|
|
if (tree) {
|
|
proto_item *ti;
|
|
proto_tree *bat_vis_entry_tree;
|
|
|
|
ti = proto_tree_add_protocol_format(tree, proto_bat_plugin, tvb, 0, 7,
|
|
"VIS Entry: [%s] %s",
|
|
val_to_str(vis_datah->type, vis_packettypenames, "Unknown (0x%02x)"),
|
|
address_with_resolution_to_str(pinfo->pool, &vis_datah->ip));
|
|
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, ENC_BIG_ENDIAN);
|
|
|
|
switch (vis_datah->type) {
|
|
case DATA_TYPE_NEIGH:
|
|
proto_tree_add_item(bat_vis_entry_tree, hf_bat_vis_tq_v23, tvb, 1, 1, ENC_BIG_ENDIAN);
|
|
break;
|
|
case DATA_TYPE_HNA:
|
|
proto_tree_add_item(bat_vis_entry_tree, hf_bat_vis_netmask, tvb, 1, 1, ENC_BIG_ENDIAN);
|
|
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);
|
|
}
|
|
}
|
|
|
|
void proto_register_bat(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_bat_batman_version,
|
|
{ "Version", "bat.batman.version",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_batman_flags,
|
|
{ "Flags", "bat.batman.flags",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_batman_ttl,
|
|
{ "Time to Live", "bat.batman.ttl",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_batman_gwflags,
|
|
{ "Gateway Flags", "bat.batman.gwflags",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_batman_gwflags_dl_speed,
|
|
{ "Download Speed", "bat.batman.gwflags.dl_speed",
|
|
FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_kbit, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_batman_gwflags_ul_speed,
|
|
{ "Upload Speed", "bat.batman.gwflags.ul_speed",
|
|
FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_kbit, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_batman_seqno,
|
|
{ "Sequence number", "bat.batman.seq",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_batman_gwport,
|
|
{ "Gateway Port", "bat.batman.gwport",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_batman_orig,
|
|
{ "Originator", "bat.batman.orig",
|
|
FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_batman_old_orig,
|
|
{ "Received from", "bat.batman.old_orig",
|
|
FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_batman_tq,
|
|
{ "Transmission Quality", "bat.batman.tq",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_batman_hna_len,
|
|
{ "Number of HNAs", "bat.batman.hna_len",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_batman_flags_unidirectional,
|
|
{ "Unidirectional", "bat.batman.flags.unidirectional",
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x80,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_batman_flags_directlink,
|
|
{ "DirectLink", "bat.batman.flags.directlink",
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x40,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_batman_hna_network,
|
|
{ "HNA Network", "bat.batman.hna_network",
|
|
FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_batman_hna_netmask,
|
|
{ "HNA Netmask", "bat.batman.hna_netmask",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_gw_type,
|
|
{ "Type", "bat.gw.type",
|
|
FT_UINT8, BASE_DEC, VALS(gw_packettypenames), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_gw_ip,
|
|
{ "IP", "bat.gw.ip",
|
|
FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_vis_vis_orig,
|
|
{ "Originator", "bat.vis.sender_ip",
|
|
FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_vis_version,
|
|
{ "Version", "bat.vis.version",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_vis_gwflags,
|
|
{ "Gateway Flags", "bat.vis.gwflags",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_max_tq_v22,
|
|
{ "Maximum Transmission Quality", "bat.vis.tq_max",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_max_tq_v23,
|
|
{ "Maximum Transmission Quality", "bat.vis.tq_max",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_vis_data_type,
|
|
{ "Type", "bat.vis.data_type",
|
|
FT_UINT8, BASE_DEC, VALS(vis_packettypenames), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bat_vis_tq_v22,
|
|
{ "Transmission Quality", "bat.vis.tq",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_bat_vis_tq_v23,
|
|
{ "Transmission Quality", "bat.vis.tq",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_bat_vis_netmask,
|
|
{ "Netmask", "bat.vis.netmask",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL}
|
|
},
|
|
{ &hf_bat_vis_data_ip,
|
|
{ "IP", "bat.vis.data_ip",
|
|
FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
}
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] = {
|
|
&ett_bat_batman,
|
|
&ett_bat_batman_flags,
|
|
&ett_bat_batman_gwflags,
|
|
&ett_bat_batman_hna,
|
|
&ett_bat_gw,
|
|
&ett_bat_vis,
|
|
&ett_bat_vis_entry
|
|
};
|
|
|
|
proto_bat_plugin = proto_register_protocol("B.A.T.M.A.N. Layer 3 Protocol", "BAT", "bat");
|
|
proto_bat_gw = proto_register_protocol("B.A.T.M.A.N. GW", "BAT GW", "bat.gw");
|
|
proto_bat_vis = proto_register_protocol("B.A.T.M.A.N. Vis", "BAT VIS", "bat.vis");
|
|
|
|
proto_register_field_array(proto_bat_plugin, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
void proto_reg_handoff_bat(void)
|
|
{
|
|
dissector_handle_t batman_handle;
|
|
dissector_handle_t gw_handle;
|
|
dissector_handle_t vis_handle;
|
|
|
|
bat_tap = register_tap("batman");
|
|
bat_follow_tap = register_tap("batman_follow");
|
|
|
|
batman_handle = create_dissector_handle(dissect_bat_batman, proto_bat_plugin);
|
|
gw_handle = create_dissector_handle(dissect_bat_gw, proto_bat_gw);
|
|
vis_handle = create_dissector_handle(dissect_bat_vis, proto_bat_vis);
|
|
|
|
ip_handle = find_dissector_add_dependency("ip", proto_bat_gw);
|
|
|
|
dissector_add_uint_with_preference("udp.port", BAT_BATMAN_PORT, batman_handle);
|
|
dissector_add_uint_with_preference("udp.port", BAT_GW_PORT, gw_handle);
|
|
dissector_add_uint_with_preference("udp.port", BAT_VIS_PORT, vis_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - https://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* tab-width: 8
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
|
|
* :indentSize=8:tabSize=8:noTabs=false:
|
|
*/
|