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wireshark/epan/dissectors/packet-bat.c

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/* packet-bat.c
* Routines for B.A.T.M.A.N. Layer 3 dissection
* Copyright 2008-2010 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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/tap.h>
#include <epan/addr_resolv.h>
/* Start content from packet-bat.h */
#define BAT_BATMAN_PORT 4305
#define BAT_GW_PORT 4306
#define BAT_VIS_PORT 4307
#define UNIDIRECTIONAL 0x80
#define DIRECTLINK 0x40
struct batman_packet_v5 {
guint8 version; /* batman version field */
guint8 flags; /* 0x80: UNIDIRECTIONAL link, 0x40: DIRECTLINK flag, ... */
guint8 ttl;
guint8 gwflags; /* flags related to gateway functions: gateway class */
guint16 seqno;
guint16 gwport;
address orig;
address old_orig;
guint8 tq;
guint8 hna_len;
};
#define BATMAN_PACKET_V5_SIZE 18
struct gw_packet {
guint8 type;
};
#define GW_PACKET_SIZE 1
#define TUNNEL_DATA 0x01
#define TUNNEL_IP_REQUEST 0x02
#define TUNNEL_IP_INVALID 0x03
#define TUNNEL_KEEPALIVE_REQUEST 0x04
#define TUNNEL_KEEPALIVE_REPLY 0x05
#define DATA_TYPE_NEIGH 1
#define DATA_TYPE_SEC_IF 2
#define DATA_TYPE_HNA 3
struct vis_packet_v22 {
address sender_ip;
guint8 version;
guint8 gw_class;
guint16 tq_max;
};
#define VIS_PACKET_V22_SIZE 8
struct vis_data_v22 {
guint8 type;
guint16 data;
address ip;
};
#define VIS_PACKET_V22_DATA_SIZE 7
struct vis_packet_v23 {
address sender_ip;
guint8 version;
guint8 gw_class;
guint8 tq_max;
};
#define VIS_PACKET_V23_SIZE 7
struct vis_data_v23 {
guint8 type;
guint8 data;
address ip;
};
#define VIS_PACKET_V23_DATA_SIZE 6
/* End content from packet-bat.h */
/* trees */
static gint ett_bat_batman = -1;
static gint ett_bat_batman_flags = -1;
static gint ett_bat_batman_gwflags = -1;
static gint ett_bat_batman_hna = -1;
static gint ett_bat_gw = -1;
static gint ett_bat_vis = -1;
static gint ett_bat_vis_entry = -1;
/* hfs */
static int hf_bat_batman_version = -1;
static int hf_bat_batman_flags = -1;
static int hf_bat_batman_ttl = -1;
static int hf_bat_batman_gwflags = -1;
static int hf_bat_batman_seqno = -1;
static int hf_bat_batman_gwport = -1;
static int hf_bat_batman_orig = -1;
static int hf_bat_batman_old_orig = -1;
static int hf_bat_batman_tq = -1;
static int hf_bat_batman_hna_len = -1;
static int hf_bat_batman_hna_network = -1;
static int hf_bat_batman_hna_netmask = -1;
static int hf_bat_gw_type = -1;
static int hf_bat_gw_ip = -1;
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;
/* flags */
static int hf_bat_batman_flags_unidirectional = -1;
static int hf_bat_batman_flags_directlink = -1;
static const value_string gw_packettypenames[] = {
{ TUNNEL_DATA, "DATA" },
{ TUNNEL_IP_REQUEST, "IP_REQUEST" },
{ TUNNEL_IP_INVALID, "IP_INVALID" },
{ TUNNEL_KEEPALIVE_REQUEST, "KEEPALIVE_REQUEST" },
{ TUNNEL_KEEPALIVE_REPLY, "KEEPALIVE_REPLY" },
{ 0, NULL }
};
static const value_string vis_packettypenames[] = {
{ DATA_TYPE_NEIGH, "NEIGH" },
{ DATA_TYPE_SEC_IF, "SEC_IF" },
{ DATA_TYPE_HNA, "HNA" },
{ 0, NULL }
};
/* forward declaration */
void proto_reg_handoff_bat(void);
/* supported packet dissectors */
static void dissect_bat_batman(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static int dissect_bat_batman_v5(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree);
static void dissect_bat_gw(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static void dissect_bat_vis(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_v22(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_vis_entry_v23(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static void dissect_bat_hna(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
/* other dissectors */
static dissector_handle_t ip_handle;
static dissector_handle_t data_handle;
static int proto_bat_plugin = -1;
/* tap */
static int bat_tap = -1;
static int bat_follow_tap = -1;
/* values changed by preferences */
static guint global_bat_batman_udp_port = BAT_BATMAN_PORT;
static guint global_bat_gw_udp_port = BAT_GW_PORT;
static guint global_bat_vis_udp_port = BAT_VIS_PORT;
static void dissect_bat_batman(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint8 version;
int offset = 0;
/* set protocol name */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "BAT_BATMAN");
col_clear(pinfo->cinfo, COL_INFO);
version = tvb_get_guint8(tvb, 0);
switch (version) {
case 5:
while (tvb_reported_length_remaining(tvb, offset)) {
offset = dissect_bat_batman_v5(tvb, offset, pinfo, tree);
}
break;
default:
col_add_fstr(pinfo->cinfo, COL_INFO, "Unsupported Version %d", version);
call_dissector(data_handle, tvb, pinfo, tree);
break;
}
}
static void dissect_bat_gwflags(tvbuff_t *tvb, guint8 gwflags, int offset, proto_item *tgw)
{
proto_tree *gwflags_tree;
guint8 s = (gwflags & 0x80) >> 7;
guint8 downbits = (gwflags & 0x78) >> 3;
guint8 upbits = (gwflags & 0x07);
guint down, up;
down = 32 * (s + 2) * (1 << downbits);
up = ((upbits + 1) * down) / 8;
gwflags_tree = proto_item_add_subtree(tgw, ett_bat_batman_gwflags);
proto_tree_add_text(gwflags_tree, tvb, offset, 1, "Download Speed: %dkbit", down);
proto_tree_add_text(gwflags_tree, tvb, offset, 1, "Upload Speed: %dkbit", up);
}
static int dissect_bat_batman_v5(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree)
{
proto_item *tf, *tgw;
proto_tree *bat_batman_tree = NULL, *flag_tree;
struct batman_packet_v5 *batman_packeth;
const guint8 *old_orig_addr, *orig_addr;
guint32 old_orig, orig;
gint i;
tvbuff_t *next_tvb;
batman_packeth = ep_alloc(sizeof(struct batman_packet_v5));
batman_packeth->version = tvb_get_guint8(tvb, offset+0);
batman_packeth->flags = tvb_get_guint8(tvb, offset+1);
batman_packeth->ttl = tvb_get_guint8(tvb, offset+2);
batman_packeth->gwflags = tvb_get_guint8(tvb, offset+3);
batman_packeth->seqno = tvb_get_ntohs(tvb, offset+4);
batman_packeth->gwport = tvb_get_ntohs(tvb, offset+6);
orig_addr = tvb_get_ptr(tvb, offset+8, 4);
orig = tvb_get_ipv4(tvb, offset+8);
SET_ADDRESS(&batman_packeth->orig, AT_IPv4, 4, orig_addr);
old_orig_addr = tvb_get_ptr(tvb, offset+12, 4);
old_orig = tvb_get_ipv4(tvb, offset+12);
SET_ADDRESS(&batman_packeth->old_orig, AT_IPv4, 4, old_orig_addr);
batman_packeth->tq = tvb_get_guint8(tvb, offset+16);
batman_packeth->hna_len = tvb_get_guint8(tvb, offset+17);
/* Set info column */
col_add_fstr(pinfo->cinfo, COL_INFO, "Seq=%u", batman_packeth->seqno);
/* Set tree info */
if (tree) {
proto_item *ti;
if (PTREE_DATA(tree)->visible) {
ti = proto_tree_add_protocol_format(tree, proto_bat_plugin, tvb, offset, BATMAN_PACKET_V5_SIZE,
"B.A.T.M.A.N., Orig: %s (%s)",
get_hostname(orig), ip_to_str(batman_packeth->orig.data));
} else {
ti = proto_tree_add_item(tree, proto_bat_plugin, tvb, offset, BATMAN_PACKET_V5_SIZE, FALSE);
}
bat_batman_tree = proto_item_add_subtree(ti, ett_bat_batman);
}
/* items */
proto_tree_add_item(bat_batman_tree, hf_bat_batman_version, tvb, offset, 1, FALSE);
offset += 1;
tf = proto_tree_add_item(bat_batman_tree, hf_bat_batman_flags, tvb, offset, 1, FALSE);
/* <flags> */
flag_tree = proto_item_add_subtree(tf, ett_bat_batman_flags);
proto_tree_add_boolean(flag_tree, hf_bat_batman_flags_unidirectional, tvb, offset, 1, batman_packeth->flags);
proto_tree_add_boolean(flag_tree, hf_bat_batman_flags_directlink, tvb, offset, 1, batman_packeth->flags);
/* </flags> */
offset += 1;
proto_tree_add_item(bat_batman_tree, hf_bat_batman_ttl, tvb, offset, 1, FALSE);
offset += 1;
tgw = proto_tree_add_item(bat_batman_tree, hf_bat_batman_gwflags, tvb, offset, 1, FALSE);
dissect_bat_gwflags(tvb, batman_packeth->gwflags, offset, tgw);
offset += 1;
proto_tree_add_item(bat_batman_tree, hf_bat_batman_seqno, tvb, offset, 2, FALSE);
offset += 2;
proto_tree_add_item(bat_batman_tree, hf_bat_batman_gwport, tvb, offset, 2, FALSE);
offset += 2;
proto_tree_add_ipv4(bat_batman_tree, hf_bat_batman_orig, tvb, offset, 4, orig);
offset += 4;
proto_tree_add_ipv4(bat_batman_tree, hf_bat_batman_old_orig, tvb, offset, 4, old_orig);
offset += 4;
proto_tree_add_item(bat_batman_tree, hf_bat_batman_tq, tvb, offset, 1, FALSE);
offset += 1;
proto_tree_add_item(bat_batman_tree, hf_bat_batman_hna_len, tvb, offset, 1, FALSE);
offset += 1;
tap_queue_packet(bat_tap, pinfo, batman_packeth);
for (i = 0; i < batman_packeth->hna_len; i++) {
next_tvb = tvb_new_subset(tvb, offset, 5, 5);
if (have_tap_listener(bat_follow_tap)) {
tap_queue_packet(bat_follow_tap, pinfo, next_tvb);
}
dissect_bat_hna(next_tvb, pinfo, bat_batman_tree);
offset += 5;
}
return offset;
}
static void dissect_bat_hna(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
{
const guint8 *hna_addr;
guint32 hna;
guint8 hna_netmask;
hna_addr = tvb_get_ptr(tvb, 0, 4);
hna = tvb_get_ipv4(tvb, 0);
hna_netmask = tvb_get_guint8(tvb, 4);
/* Set tree info */
if (tree) {
proto_item *ti;
proto_tree *bat_batman_hna_tree;
if (PTREE_DATA(tree)->visible) {
ti = proto_tree_add_protocol_format(tree, proto_bat_plugin, tvb, 0, 5,
"B.A.T.M.A.N. HNA: %s/%d",
ip_to_str(hna_addr), hna_netmask);
} else {
ti = proto_tree_add_item(tree, proto_bat_plugin, tvb, 0, 5, FALSE);
}
bat_batman_hna_tree = proto_item_add_subtree(ti, ett_bat_batman_hna);
proto_tree_add_ipv4(bat_batman_hna_tree, hf_bat_batman_hna_network, tvb, 0, 4, hna);
proto_tree_add_item(bat_batman_hna_tree, hf_bat_batman_hna_netmask, tvb, 4, 1, FALSE);
}
}
static void dissect_bat_gw(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
struct gw_packet *gw_packeth;
const guint8 *ip_addr;
guint32 ip;
int ip_pos;
tvbuff_t *next_tvb;
guint length_remaining;
int offset = 0;
gw_packeth = ep_alloc(sizeof(struct gw_packet));
gw_packeth->type = tvb_get_guint8(tvb, 0);
switch (gw_packeth->type) {
case TUNNEL_IP_INVALID:
ip_pos = 13;
break;
default:
ip_pos = 1;
}
ip = tvb_get_ipv4(tvb, ip_pos);
ip_addr = tvb_get_ptr(tvb, ip_pos, 4);
/* set protocol name */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "BAT_GW");
/* Set info column */
if (check_col(pinfo->cinfo, COL_INFO)) {
col_add_fstr(pinfo->cinfo, COL_INFO, "Type=%s",
val_to_str(gw_packeth->type, gw_packettypenames, "Unknown (0x%02x)"));
if (ip != 0) {
col_append_fstr(pinfo->cinfo, COL_INFO, " IP: %s (%s)",
get_hostname(ip), ip_to_str(ip_addr));
}
}
/* Set tree info */
if (tree) {
proto_item *ti;
proto_tree *bat_gw_entry_tree;
if (PTREE_DATA(tree)->visible) {
ti = proto_tree_add_protocol_format(tree, proto_bat_plugin, tvb, 0, 1,
"B.A.T.M.A.N. GW [%s]",
val_to_str(gw_packeth->type, gw_packettypenames, "Unknown (0x%02x)"));
} else {
ti = proto_tree_add_item(tree, proto_bat_plugin, tvb, 0, 1, FALSE);
}
bat_gw_entry_tree = proto_item_add_subtree(ti, ett_bat_gw);
proto_tree_add_item(bat_gw_entry_tree, hf_bat_gw_type, tvb, offset, 1, FALSE);
offset += 1;
if (gw_packeth->type != TUNNEL_DATA && ip != 0) {
proto_tree_add_ipv4(bat_gw_entry_tree, hf_bat_gw_ip, tvb, ip_pos, 4, ip);
offset = ip_pos + 4;
}
}
/* Calculate offset even when we got no tree */
offset = 1;
if (gw_packeth->type != TUNNEL_DATA && ip != 0)
offset = ip_pos + 4;
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);
}
if (gw_packeth->type == TUNNEL_DATA) {
call_dissector(ip_handle, next_tvb, pinfo, tree);
} else {
call_dissector(data_handle, next_tvb, pinfo, tree);
}
}
}
static void dissect_bat_vis(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint8 version;
/* set protocol name */
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:
col_add_fstr(pinfo->cinfo, COL_INFO, "Unsupported Version %d", version);
call_dissector(data_handle, tvb, pinfo, tree);
break;
}
}
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, AT_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 */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "BAT_VIS");
/* Set info column */
if (check_col(pinfo->cinfo, COL_INFO)) {
col_add_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;
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;
}
/* 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(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_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_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, AT_IPv4, 4, ip_addr);
/* Set tree info */
if (tree) {
proto_item *ti;
proto_tree *bat_vis_entry_tree;
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, vis_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:
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;
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, AT_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 */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "BAT_VIS");
/* Set info column */
if (check_col(pinfo->cinfo, COL_INFO)) {
col_add_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;
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;
}
/* 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(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_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_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, AT_IPv4, 4, ip_addr);
/* Set tree info */
if (tree) {
proto_item *ti;
proto_tree *bat_vis_entry_tree;
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, vis_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:
break;
}
proto_tree_add_ipv4(bat_vis_entry_tree, hf_bat_vis_data_ip, tvb, 2, 4, ip);
}
}
void proto_register_bat(void)
{
module_t *bat_module;
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_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", /* short name */
"bat" /* abbrev */
);
/* Register our configuration options for B.A.T.M.A.N. */
bat_module = prefs_register_protocol(proto_bat_plugin, proto_reg_handoff_bat);
proto_register_field_array(proto_bat_plugin, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
prefs_register_uint_preference(bat_module, "batman.bat.port", "BAT UDP Port",
"Set the port for B.A.T.M.A.N. BAT "
"messages (if other than the default of 4305)",
10, &global_bat_batman_udp_port);
prefs_register_uint_preference(bat_module, "batman.gw.port", "GW UDP Port",
"Set the port for B.A.T.M.A.N. Gateway "
"messages (if other than the default of 4306)",
10, &global_bat_gw_udp_port);
prefs_register_uint_preference(bat_module, "batman.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 proto_reg_handoff_bat(void)
{
static gboolean inited = FALSE;
static dissector_handle_t batman_handle;
static dissector_handle_t gw_handle;
static dissector_handle_t vis_handle;
static guint batman_udp_port;
static guint gw_udp_port;
static guint vis_udp_port;
if (!inited) {
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_plugin);
vis_handle = create_dissector_handle(dissect_bat_vis, proto_bat_plugin);
ip_handle = find_dissector("ip");
data_handle = find_dissector("data");
inited = TRUE;
} else {
dissector_delete_uint("udp.port", batman_udp_port, batman_handle);
dissector_delete_uint("udp.port", gw_udp_port, gw_handle);
dissector_delete_uint("udp.port", vis_udp_port, vis_handle);
}
batman_udp_port = global_bat_batman_udp_port;
gw_udp_port = global_bat_gw_udp_port;
vis_udp_port = global_bat_vis_udp_port;
dissector_add_uint("udp.port", batman_udp_port, batman_handle);
dissector_add_uint("udp.port", gw_udp_port, gw_handle);
dissector_add_uint("udp.port", vis_udp_port, vis_handle);
}
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