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wireshark/epan/dissectors/packet-dsr.c

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/* packet-dsr.c
* Routines for DSR dissection
* Copyright 2014, ENAC - Gilles Roudiere <gilles.roudiere@enac.fr or gilles@roudiere.net>
* ENAC's URL : http://www.enac.fr/
* Mail to : gilles.roudiere@enac.fr or nicolas.larrieu@enac.fr
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/ipproto.h>
#include <epan/addr_resolv.h>
/* Please refer to rfc4728 for DSR protocol specifications */
/* Forward declaration that is needed below if using the
* proto_reg_handoff_dsr function as a callback for when protocol
* preferences get changed. */
void proto_reg_handoff_dsr(void);
void proto_register_dsr(void);
static dissector_table_t ip_dissector_table;
/* Initialize the protocol and registered fields */
static int proto_dsr = -1;
/* DSR global fields */
static int hf_dsr_nexthdr = -1;
static int hf_dsr_flowstate = -1;
static int hf_dsr_reserved = -1;
static int hf_dsr_length = -1;
static int hf_dsr_opttype = -1;
static int hf_dsr_optlen = -1;
static int hf_dsr_fs_hopcount = -1;
static int hf_dsr_fs_id = -1;
/* RREQ option fields */
static int hf_dsr_opt_rreq_id = -1;
static int hf_dsr_opt_rreq_targetaddress = -1;
static int hf_dsr_opt_rreq_address = -1;
/* RREP option fields */
static int hf_dsr_opt_rrep_lasthopex = -1;
static int hf_dsr_opt_rrep_reserved = -1;
static int hf_dsr_opt_rrep_address = -1;
/* RERR option fields */
static int hf_dsr_opt_err_type = -1;
static int hf_dsr_opt_err_reserved = -1;
static int hf_dsr_opt_err_salvage = -1;
static int hf_dsr_opt_err_src = -1;
static int hf_dsr_opt_err_dest = -1;
static int hf_dsr_opt_err_unreach_addr = -1;
static int hf_dsr_opt_err_unsupportedoption = -1;
static int hf_dsr_opt_err_unknownflow_dest = -1;
static int hf_dsr_opt_err_unknownflow_id = -1;
static int hf_dsr_opt_err_defaultflowunknown_dest = -1;
/* ACK REQuest option fields */
static int hf_dsr_opt_ack_req_id = -1;
static int hf_dsr_opt_ack_req_address = -1;
/* ACK option fields */
static int hf_dsr_opt_ack_id = -1;
static int hf_dsr_opt_ack_src = -1;
static int hf_dsr_opt_ack_dest = -1;
/* SRCRT option fields */
static int hf_dsr_opt_srcrt_firsthopext = -1;
static int hf_dsr_opt_srcrt_lasthopext = -1;
static int hf_dsr_opt_srcrt_reserved = -1;
static int hf_dsr_opt_srcrt_salvage = -1;
static int hf_dsr_opt_srcrt_segsleft = -1;
static int hf_dsr_opt_srcrt_address = -1;
/* Flow State Extentions */
/* Timout option fields */
static int hf_dsr_fs_opt_timeout_timeout = -1;
/* Flow ID / destination option fields */
static int hf_dsr_fs_opt_destflowid_id = -1;
static int hf_dsr_fs_opt_destflowid_dest = -1;
/* Initialize the subtree pointers */
static gint ett_dsr = -1;
/* DSR options tree */
static gint ett_dsr_options = -1;
static gint ett_dsr_rreq_opt = -1;
static gint ett_dsr_rrep_opt = -1;
static gint ett_dsr_rerr_opt = -1;
static gint ett_dsr_ackreq_opt = -1;
static gint ett_dsr_ack_opt = -1;
static gint ett_dsr_srcrt_opt = -1;
static gint ett_dsr_padn_opt = -1;
static gint ett_dsr_pad1_opt = -1;
static gint ett_dsr_fs_timeout_opt = -1;
static gint ett_dsr_fs_destflowid_opt = -1;
/* hoplist trees */
static gint ett_dsr_rreq_hoplist = -1;
static gint ett_dsr_rrep_hoplist = -1;
static gint ett_dsr_srcrt_hoplist = -1;
/* A sample #define of the minimum length (in bytes) of the protocol data.
* If data is received with fewer than this many bytes it is rejected by
* the current dissector. */
#define DSR_MIN_LENGTH 4
/* DSR option types */
#define DSR_OPT_TYPE_RREQ 1
#define DSR_OPT_TYPE_RREP 2
#define DSR_OPT_TYPE_RERR 3
#define DSR_OPT_TYPE_ACKREQ 160
#define DSR_OPT_TYPE_ACK 32
#define DSR_OPT_TYPE_SRCRT 96
#define DSR_OPT_TYPE_PAD1 224
#define DSR_OPT_TYPE_PADN 0
/* DSR Flow State extention types */
#define DSR_FS_OPT_TYPE_TIMEOUT 128
#define DSR_FS_OPT_TYPE_DESTFLOWID 129
/* Route error types */
#define DSR_RERR_TYPE_UNREACHABLE 1
#define DSR_RERR_TYPE_FLOWSTATENOTSUPPORTED 2
#define DSR_RERR_TYPE_OPTIONNOTSUPPORTED 3
#define DSR_RERR_TYPE_UNKNOWNFLOW 129
#define DSR_RERR_TYPE_DEFAULTFLOWUNKNOWN 130
/* DSR option names */
static const value_string dsropttypenames[] ={
{DSR_OPT_TYPE_RREQ, "Route request"},
{DSR_OPT_TYPE_RREP, "Route reply"},
{DSR_OPT_TYPE_RERR, "Route error"},
{DSR_OPT_TYPE_ACKREQ, "Acknowledgement request"},
{DSR_OPT_TYPE_ACK, "Acknowledgement"},
{DSR_OPT_TYPE_SRCRT, "Source route"},
{DSR_OPT_TYPE_PAD1, "Padding by 1"},
{DSR_OPT_TYPE_PADN, "Padding by N"},
{0, NULL}
};
/* DSR Route error names */
static const value_string dsrrerrtypenames[] ={
{DSR_RERR_TYPE_UNREACHABLE, "Unreachable node"},
{DSR_RERR_TYPE_FLOWSTATENOTSUPPORTED, "Flow state not supported"},
{DSR_RERR_TYPE_OPTIONNOTSUPPORTED, "Option not supported"},
{DSR_RERR_TYPE_UNKNOWNFLOW, "Unknown flow"},
{DSR_RERR_TYPE_DEFAULTFLOWUNKNOWN, "Default flow unknown"},
{0, NULL}
};
/* Code to actually dissect the packets */
static int
dissect_dsr(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
void *data _U_)
{
/* Set up structures needed to add the protocol subtree and manage it */
proto_item *ti_main, *ti, *ti_hoplist;
proto_tree *dsr_tree, *opt_tree, *options_tree, *opt_hoplist_tree;
/* Other misc. local variables. */
guint offset = 0; /* Global offset in DSR packet */
guint offset_in_option = 0; /* Per-option offset */
guint nexthdr, opt_tot_len, opt_len, opt_type, opt_id, opt_err_type, flowstate_hdr;
guint i;
tvbuff_t *next_tvb;
/* Check that the packet is long enough for it to belong to us. */
if (tvb_reported_length(tvb) < DSR_MIN_LENGTH)
return 0;
/* Set the Protocol column to the constant string of dsr */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "DSR");
col_add_str(pinfo->cinfo, COL_INFO, "Options : ");
/* create display subtree for the protocol */
ti_main = proto_tree_add_item(tree, proto_dsr, tvb, 0, -1, ENC_NA);
dsr_tree = proto_item_add_subtree(ti_main, ett_dsr);
proto_tree_add_item(dsr_tree, hf_dsr_nexthdr, tvb, offset, 1, ENC_BIG_ENDIAN); /* Next header */
nexthdr = tvb_get_guint8(tvb, offset);
offset += 1;
proto_tree_add_item(dsr_tree, hf_dsr_flowstate, tvb, offset, 1, ENC_BIG_ENDIAN); /* Flowstate */
flowstate_hdr = tvb_get_bits8(tvb, offset*8, 1);
/*DSR normal header*/
if (!flowstate_hdr) {
proto_tree_add_item(dsr_tree, hf_dsr_reserved, tvb, offset, 1, ENC_BIG_ENDIAN); /* Reserved */
offset += 1;
proto_tree_add_item(dsr_tree, hf_dsr_length, tvb, offset, 2, ENC_BIG_ENDIAN); /* Dsr opt tot length */
opt_tot_len = tvb_get_ntohs(tvb, offset);
proto_item_set_len(ti_main, opt_tot_len+4);
offset += 2;
options_tree = proto_tree_add_subtree(dsr_tree, tvb, offset, opt_tot_len, ett_dsr_options, NULL, "Options"); /* DSR options */
/* DSR options dissection */
while (offset - 4 < opt_tot_len) {
opt_type = tvb_get_guint8(tvb, offset);
offset_in_option = offset;
opt_len = 0;
switch(opt_type) {
case DSR_OPT_TYPE_RREQ:
opt_tree = proto_tree_add_subtree(options_tree, tvb, offset_in_option, 1, ett_dsr_rreq_opt, &ti, "Route request"); /* Opt subtree */
col_append_str(pinfo->cinfo, COL_INFO, "Route request");
proto_tree_add_item(opt_tree, hf_dsr_opttype, tvb, offset_in_option, 1, ENC_BIG_ENDIAN); /* Opt type */
offset_in_option += 1;
proto_tree_add_item(opt_tree, hf_dsr_optlen, tvb, offset_in_option, 1, ENC_BIG_ENDIAN); /* Opt len */
opt_len = tvb_get_guint8(tvb, offset_in_option);
proto_item_set_len(ti, opt_len+2);
offset_in_option += 1;
proto_tree_add_item(opt_tree, hf_dsr_opt_rreq_id, tvb, offset_in_option, 2, ENC_BIG_ENDIAN); /* Opt rreq id */
opt_id = tvb_get_ntohs(tvb, offset_in_option);
col_append_fstr(pinfo->cinfo, COL_INFO, " (id=0x%x)", opt_id);
offset_in_option += 2;
proto_tree_add_item(opt_tree, hf_dsr_opt_rreq_targetaddress, tvb, offset_in_option, 4, ENC_NA); /* Opt rreq target address */
offset_in_option += 4;
if(opt_len > 6) {
opt_hoplist_tree = proto_tree_add_subtree(opt_tree, tvb, offset_in_option, 1, ett_dsr_rreq_hoplist, &ti_hoplist, "Hop list" ); /* Opt hop list */
proto_item_append_text(ti_hoplist, " :");
for(i=0;i<(opt_len-4)/4;i++) {
proto_tree_add_item(opt_hoplist_tree, hf_dsr_opt_rreq_address, tvb, offset_in_option, 4, ENC_NA); /* Opt rreq address */
proto_item_append_text(ti_hoplist, " %s", tvb_ip_to_str(tvb, offset_in_option));
offset_in_option += 4;
}
}
break;
case DSR_OPT_TYPE_RREP:
opt_tree = proto_tree_add_subtree(options_tree, tvb, offset_in_option, 1, ett_dsr_rrep_opt, &ti, "Route reply"); /* Opt subtree */
col_append_str(pinfo->cinfo, COL_INFO, "Route reply");
proto_tree_add_item(opt_tree, hf_dsr_opttype, tvb, offset_in_option, 1, ENC_BIG_ENDIAN); /* Opt type */
offset_in_option += 1;
proto_tree_add_item(opt_tree, hf_dsr_optlen, tvb, offset_in_option, 1, ENC_BIG_ENDIAN); /* Opt len */
opt_len = tvb_get_guint8(tvb, offset_in_option);
proto_item_set_len(ti, opt_len+2);
offset_in_option += 1;
proto_tree_add_item(opt_tree, hf_dsr_opt_rrep_lasthopex, tvb, offset_in_option, 1, ENC_BIG_ENDIAN); /* Opt rrep reserved */
proto_tree_add_item(opt_tree, hf_dsr_opt_rrep_reserved, tvb, offset_in_option, 1, ENC_BIG_ENDIAN); /* Opt rrep reserved */
offset_in_option += 1;
if(opt_len > 2) {
opt_hoplist_tree = proto_tree_add_subtree(opt_tree, tvb, offset_in_option, 1, ett_dsr_rrep_hoplist, &ti_hoplist, "Hop list" ); /* Opt hop list */
proto_item_append_text(ti_hoplist, " :");
for(i=0;i<(opt_len-1)/4;i++) {
proto_tree_add_item(opt_hoplist_tree, hf_dsr_opt_rrep_address, tvb, offset_in_option, 4, ENC_NA); /*Opt rrep address */
proto_item_append_text(ti_hoplist, " %s", tvb_ip_to_str(tvb, offset_in_option));
offset_in_option += 4;
}
}
break;
case DSR_OPT_TYPE_RERR:
opt_tree = proto_tree_add_subtree(options_tree, tvb, offset_in_option, 1, ett_dsr_rerr_opt, &ti, "Route error"); /* Opt subtree */
col_append_str(pinfo->cinfo, COL_INFO, "Route error");
proto_tree_add_item(opt_tree, hf_dsr_opttype, tvb, offset_in_option, 1, ENC_BIG_ENDIAN); /* Opt type */
offset_in_option += 1;
proto_tree_add_item(opt_tree, hf_dsr_optlen, tvb, offset_in_option, 1, ENC_BIG_ENDIAN); /* Opt len */
opt_len = tvb_get_guint8(tvb, offset_in_option);
proto_item_set_len(ti, opt_len+2);
offset_in_option += 1;
proto_tree_add_item(opt_tree, hf_dsr_opt_err_type, tvb, offset_in_option, 1, ENC_BIG_ENDIAN); /* Opt err type */
opt_err_type = tvb_get_guint8(tvb, offset_in_option);
offset_in_option += 1;
proto_tree_add_bits_item(opt_tree, hf_dsr_opt_err_reserved, tvb, offset_in_option*8, 4, ENC_BIG_ENDIAN); /*Opt err reserved */
proto_tree_add_bits_item(opt_tree, hf_dsr_opt_err_salvage, tvb, offset_in_option*8+4, 4, ENC_BIG_ENDIAN); /*Opt err salvage */
offset_in_option += 1;
proto_tree_add_item(opt_tree, hf_dsr_opt_err_src, tvb, offset_in_option, 4, ENC_NA); /*Opt err source address */
offset_in_option += 4;
proto_tree_add_item(opt_tree, hf_dsr_opt_err_dest, tvb, offset_in_option, 4, ENC_NA); /* Opt err dest address */
offset_in_option += 4;
switch(opt_err_type) {
case DSR_RERR_TYPE_UNREACHABLE:
proto_tree_add_item(opt_tree, hf_dsr_opt_err_unreach_addr, tvb, offset_in_option, 4, ENC_NA); /* Opt err unreachable node address */
/*offset_in_option += 4;*/
break;
case DSR_RERR_TYPE_FLOWSTATENOTSUPPORTED:
break;
case DSR_RERR_TYPE_OPTIONNOTSUPPORTED:
proto_tree_add_item(opt_tree, hf_dsr_opt_err_unsupportedoption, tvb, offset_in_option, 1, ENC_BIG_ENDIAN); /* Opt err unsupported opt */
/*offset_in_option += 1;*/
break;
case DSR_RERR_TYPE_UNKNOWNFLOW:
proto_tree_add_item(opt_tree, hf_dsr_opt_err_unknownflow_dest, tvb, offset_in_option, 4, ENC_NA);/* Opt err unknown flow original ip destination address */
offset_in_option += 4;
proto_tree_add_item(opt_tree, hf_dsr_opt_err_unknownflow_id, tvb, offset_in_option, 2, ENC_BIG_ENDIAN);/* Opt err unknown flow flow id */
/*offset_in_option += 1;*/
break;
case DSR_RERR_TYPE_DEFAULTFLOWUNKNOWN:
proto_tree_add_item(opt_tree, hf_dsr_opt_err_defaultflowunknown_dest, tvb, offset_in_option, 4, ENC_NA);/* opt err default flow unknown original ip destination address */
/*offset_in_option += 4;*/
break;
}
break;
case DSR_OPT_TYPE_ACKREQ:
opt_tree = proto_tree_add_subtree(options_tree, tvb, offset_in_option, 1, ett_dsr_ackreq_opt, &ti, "Acknowledgement request"); /* Opt subtree */
col_append_str(pinfo->cinfo, COL_INFO, "Ack request");
proto_tree_add_item(opt_tree, hf_dsr_opttype, tvb, offset_in_option, 1, ENC_BIG_ENDIAN); /* Opt type */
offset_in_option += 1;
proto_tree_add_item(opt_tree, hf_dsr_optlen, tvb, offset_in_option, 1, ENC_BIG_ENDIAN); /* Opt len */
opt_len = tvb_get_guint8(tvb, offset_in_option);
proto_item_set_len(ti, opt_len+2);
offset_in_option += 1;
proto_tree_add_item(opt_tree, hf_dsr_opt_ack_req_id, tvb, offset_in_option, 2, ENC_BIG_ENDIAN); /* Opt ack req id */
opt_id = tvb_get_ntohs(tvb, offset_in_option);
col_append_fstr(pinfo->cinfo, COL_INFO, " (id=0x%x)", opt_id);
offset_in_option += 2;
if(opt_len >= 6) {
proto_tree_add_item(opt_tree, hf_dsr_opt_ack_req_address, tvb, offset_in_option, 4, ENC_NA); /* Opt ack req id */
/*offset_in_option += 4;*/
}
break;
case DSR_OPT_TYPE_ACK:
opt_tree = proto_tree_add_subtree(options_tree, tvb, offset_in_option, 1, ett_dsr_ack_opt, &ti, "Acknowledgement"); /* Opt subtree */
col_append_str(pinfo->cinfo, COL_INFO, "Ack");
proto_tree_add_item(opt_tree, hf_dsr_opttype, tvb, offset_in_option, 1, ENC_BIG_ENDIAN); /* Opt type */
offset_in_option += 1;
proto_tree_add_item(opt_tree, hf_dsr_optlen, tvb, offset_in_option, 1, ENC_BIG_ENDIAN); /* Opt len */
opt_len = tvb_get_guint8(tvb, offset_in_option);
proto_item_set_len(ti, opt_len+2);
offset_in_option += 1;
proto_tree_add_item(opt_tree, hf_dsr_opt_ack_id, tvb, offset_in_option, 2, ENC_BIG_ENDIAN); /* Opt ack id */
opt_id = tvb_get_ntohs(tvb, offset_in_option);
col_append_fstr(pinfo->cinfo, COL_INFO, " (id=0x%x)", opt_id);
offset_in_option += 2;
proto_tree_add_item(opt_tree, hf_dsr_opt_ack_src, tvb, offset_in_option, 4, ENC_NA); /* Opt ack source address */
offset_in_option += 4;
proto_tree_add_item(opt_tree, hf_dsr_opt_ack_dest, tvb, offset_in_option, 4, ENC_NA); /* Opt ack dest address */
/*offset_in_option += 4;*/
break;
case DSR_OPT_TYPE_SRCRT:
opt_tree = proto_tree_add_subtree(options_tree, tvb, offset_in_option, 1, ett_dsr_srcrt_opt, &ti, "Source route"); /* Opt subtree */
col_append_str(pinfo->cinfo, COL_INFO, "Source route");
proto_tree_add_item(opt_tree, hf_dsr_opttype, tvb, offset_in_option, 1, ENC_BIG_ENDIAN); /* Opt type */
offset_in_option += 1;
proto_tree_add_item(opt_tree, hf_dsr_optlen, tvb, offset_in_option, 1, ENC_BIG_ENDIAN); /* Opt len */
opt_len = tvb_get_guint8(tvb, offset_in_option );
proto_item_set_len(ti, opt_len+2);
offset_in_option += 1;
proto_tree_add_bits_item(opt_tree, hf_dsr_opt_srcrt_firsthopext, tvb, offset_in_option*8, 1, ENC_BIG_ENDIAN); /* Opt srcrt first hop external */
proto_tree_add_bits_item(opt_tree, hf_dsr_opt_srcrt_lasthopext, tvb, offset_in_option*8+1, 1, ENC_BIG_ENDIAN); /* Opt srcrt last hop external */
proto_tree_add_bits_item(opt_tree, hf_dsr_opt_srcrt_reserved, tvb, offset_in_option*8+2, 4, ENC_BIG_ENDIAN); /* Opt srcrt reserved */
proto_tree_add_bits_item(opt_tree, hf_dsr_opt_srcrt_salvage, tvb, offset_in_option*8+6, 4, ENC_BIG_ENDIAN); /* Opt srcrt salvage */
offset_in_option += 1;
proto_tree_add_item(opt_tree, hf_dsr_opt_srcrt_segsleft, tvb, offset_in_option , 1, ENC_BIG_ENDIAN); /* Opt srcrt segs left */
offset_in_option += 1;
if(opt_len > 2) {
opt_hoplist_tree = proto_tree_add_subtree(opt_tree, tvb, offset_in_option, 1, ett_dsr_srcrt_hoplist, &ti_hoplist, "Hop list" ); /* Opt hop list */
proto_item_append_text(ti_hoplist, " :");
for(i=0;i<(opt_len-2)/4;i++) {
proto_tree_add_item(opt_hoplist_tree, hf_dsr_opt_srcrt_address, tvb, offset_in_option , 4, ENC_NA); /* Opt srcrt addresses */
proto_item_append_text(ti_hoplist, " %s", tvb_ip_to_str(tvb, offset_in_option));
offset_in_option += 4;
}
}
break;
case DSR_OPT_TYPE_PADN:
opt_tree = proto_tree_add_subtree(options_tree, tvb, offset_in_option, 1, ett_dsr_padn_opt, &ti, "PadN"); /* Opt subtree */
proto_tree_add_item(opt_tree, hf_dsr_opttype, tvb, offset_in_option , 1, ENC_BIG_ENDIAN); /* Opt type */
offset_in_option += 1;
proto_tree_add_item(opt_tree, hf_dsr_optlen, tvb, offset_in_option , 1, ENC_BIG_ENDIAN); /* Opt len */
opt_len = tvb_get_guint8(tvb, offset_in_option );
proto_item_set_len(ti, opt_len+2);
/*offset_in_option += 1;
offset_in_option += opt_len;*/
break;
case DSR_OPT_TYPE_PAD1:
opt_tree = proto_tree_add_subtree(options_tree, tvb, offset_in_option, 1, ett_dsr_pad1_opt, &ti, "Pad1"); /* Opt subtree */
proto_tree_add_item(opt_tree, hf_dsr_opttype, tvb, offset_in_option , 1, ENC_BIG_ENDIAN); /* Opt type */
/*offset_in_option += 1;*/
break;
case DSR_FS_OPT_TYPE_TIMEOUT :
opt_tree = proto_tree_add_subtree(options_tree, tvb, offset_in_option, 1, ett_dsr_fs_timeout_opt, &ti, "Timeout"); /* Opt subtree */
col_append_str(pinfo->cinfo, COL_INFO, "Timeout");
proto_tree_add_item(opt_tree, hf_dsr_opttype, tvb, offset_in_option, 1, ENC_BIG_ENDIAN); /* Opt type */
offset_in_option += 1;
proto_tree_add_item(opt_tree, hf_dsr_optlen, tvb, offset_in_option, 1, ENC_BIG_ENDIAN); /* Opt len */
opt_len = tvb_get_guint8(tvb, offset_in_option );
proto_item_set_len(ti, opt_len+2);
offset_in_option += 1;
proto_tree_add_item(opt_tree, hf_dsr_fs_opt_timeout_timeout, tvb, offset_in_option, 2, ENC_BIG_ENDIAN); /* Timeout */
/*offset_in_option += 2;*/
break;
case DSR_FS_OPT_TYPE_DESTFLOWID:
opt_tree = proto_tree_add_subtree(options_tree, tvb, offset_in_option, 1, ett_dsr_fs_destflowid_opt, &ti, "Destination and flow id"); /* Opt subtree */
col_append_str(pinfo->cinfo, COL_INFO, "Dest&FlowId");
proto_tree_add_item(opt_tree, hf_dsr_opttype, tvb, offset_in_option, 1, ENC_BIG_ENDIAN); /* Opt type */
offset_in_option += 1;
proto_tree_add_item(opt_tree, hf_dsr_optlen, tvb, offset_in_option, 1, ENC_BIG_ENDIAN); /* Opt len */
opt_len = tvb_get_guint8(tvb, offset_in_option );
proto_item_set_len(ti, opt_len+2);
offset_in_option += 1;
proto_tree_add_item(opt_tree, hf_dsr_fs_opt_destflowid_id, tvb, offset_in_option, 2, ENC_BIG_ENDIAN); /* Flow ID */
offset_in_option += 2;
proto_tree_add_item(opt_tree, hf_dsr_fs_opt_destflowid_dest, tvb, offset_in_option, 4, ENC_NA); /* Original IP Dest Address */
/*offset_in_option += 4;*/
break;
}
if (opt_type != DSR_OPT_TYPE_PAD1)
offset += 2+opt_len;
else
offset += 1;
if(offset-4 < opt_tot_len && opt_type != DSR_OPT_TYPE_PAD1 && opt_type != DSR_OPT_TYPE_PADN) {
col_append_str(pinfo->cinfo, COL_INFO, ", ");
}
}
} else { /* DSR Flow state header */
proto_tree_add_item(dsr_tree, hf_dsr_fs_hopcount, tvb, offset, 1, ENC_BIG_ENDIAN); /* Hop count */
offset += 1;
proto_tree_add_item(dsr_tree, hf_dsr_fs_id, tvb, offset, 1, ENC_BIG_ENDIAN); /* Flow identifier */
offset += 2;
}
/* Call other dissectors if needed */
next_tvb = tvb_new_subset_remaining(tvb, offset);
if (!dissector_try_uint(ip_dissector_table, nexthdr, next_tvb, pinfo, tree)) {
call_data_dissector(next_tvb, pinfo, tree);
}
return offset+4;
}
/* Register DSR with Wireshark.*/
void
proto_register_dsr(void)
{
/* Setup list of header fields */
static hf_register_info hf[] = {
{ &hf_dsr_nexthdr,
{ "Next header", "dsr.nexthdr",
FT_UINT8, BASE_HEX | BASE_EXT_STRING,
&ipproto_val_ext, 0x0,
"Next header protocol type", HFILL }
},
{ &hf_dsr_flowstate,
{ "Flow state", "dsr.flowstate",
FT_BOOLEAN, 8,
NULL, 0x80,
NULL, HFILL }
},
/* DSR normal header */
{ &hf_dsr_reserved,
{ "Reserved", "dsr.reserved",
FT_UINT8, BASE_HEX,
NULL, 0x7F,
NULL, HFILL }
},
{ &hf_dsr_length,
{ "Length", "dsr.len",
FT_UINT8, BASE_DEC,
NULL, 0x0,
"Payload length", HFILL }
},
{ &hf_dsr_opttype,
{ "Type", "dsr.option.type",
FT_UINT8, BASE_DEC,
VALS(dsropttypenames), 0x0,
NULL, HFILL }
},
{ &hf_dsr_optlen,
{ "Length", "dsr.option.len",
FT_UINT8, BASE_DEC,
NULL, 0x0,
"Option length", HFILL }
},
/* RREQ fields */
{ &hf_dsr_opt_rreq_id,
{ "Id", "dsr.option.rreq.id",
FT_UINT16, BASE_HEX_DEC,
NULL, 0x0,
NULL, HFILL }
},
{ &hf_dsr_opt_rreq_targetaddress,
{ "Target address", "dsr.option.rreq.targetaddress",
FT_IPv4, BASE_NONE,
NULL, 0x0,
"Target IP address", HFILL }
},
{ &hf_dsr_opt_rreq_address,
{ "Hop", "dsr.option.rreq.address",
FT_IPv4, BASE_NONE,
NULL, 0x0,
NULL, HFILL }
},
/* RREP fields */
{ &hf_dsr_opt_rrep_lasthopex,
{ "Last hop external", "dsr.option.rrep.lasthopex",
FT_BOOLEAN, 8,
NULL, 0x80,
NULL, HFILL }
},
{ &hf_dsr_opt_rrep_reserved,
{ "Reserved", "dsr.option.rrep.reserved",
FT_UINT8, BASE_HEX,
NULL, 0x7F,
NULL, HFILL }
},
{ &hf_dsr_opt_rrep_address,
{ "Hop", "dsr.option.rrep.address",
FT_IPv4, BASE_NONE,
NULL, 0x0,
NULL, HFILL }
},
/* RERR fields */
{ &hf_dsr_opt_err_type,
{ "Type", "dsr.option.err.type",
FT_UINT8, BASE_DEC,
VALS(dsrrerrtypenames), 0x0,
NULL, HFILL }
},
{ &hf_dsr_opt_err_reserved,
{ "Reserved", "dsr.option.err.reserved",
FT_UINT8, BASE_HEX,
NULL, 0x00,
NULL, HFILL }
},
{ &hf_dsr_opt_err_salvage,
{ "Salvage", "dsr.option.err.salvage",
FT_UINT8, BASE_HEX,
NULL, 0x00,
NULL, HFILL }
},
{ &hf_dsr_opt_err_src,
{ "Source address", "dsr.option.err.src",
FT_IPv4, BASE_NONE,
NULL, 0x00,
"Source IP address", HFILL }
},
{ &hf_dsr_opt_err_dest,
{ "Destination address", "dsr.option.err.dest",
FT_IPv4, BASE_NONE,
NULL, 0x00,
"Destination IP address", HFILL }
},
{ &hf_dsr_opt_err_unreach_addr,
{ "Unreachable node address", "dsr.option.err.unreachablenode",
FT_IPv4, BASE_NONE,
NULL, 0x00,
"Unreachable node IP address", HFILL }
},
{ &hf_dsr_opt_err_unsupportedoption,
{ "Unsupported option", "dsr.option.err.unsupportedoption",
FT_UINT8, BASE_HEX,
NULL, 0x00,
NULL, HFILL }
},
/* ACKREQ fields */
{ &hf_dsr_opt_ack_req_id,
{ "Id", "dsr.option.ackreq.id",
FT_UINT16, BASE_HEX_DEC,
NULL, 0x0,
NULL, HFILL }
},
{ &hf_dsr_opt_ack_req_address,
{ "Source address", "dsr.option.ackreq.address",
FT_IPv4, BASE_NONE,
NULL, 0x0,
"Source IP address", HFILL }
},
/* ACK fields */
{ &hf_dsr_opt_ack_id,
{ "Id", "dsr.option.ack.id",
FT_UINT16, BASE_HEX_DEC,
NULL, 0x0,
NULL, HFILL }
},
{ &hf_dsr_opt_ack_src,
{ "Source IP", "dsr.option.ack.source",
FT_IPv4, BASE_NONE,
NULL, 0x0,
"Source IP address", HFILL }
},
{ &hf_dsr_opt_ack_dest,
{ "Destination IP", "dsr.option.ack.dest",
FT_IPv4, BASE_NONE,
NULL, 0x0,
"Destination IP address", HFILL }
},
/* SRCRT fields */
{ &hf_dsr_opt_srcrt_firsthopext,
{ "First hop external", "dsr.option.srcrt.firsthopext",
FT_BOOLEAN, BASE_NONE,
NULL, 0x0,
NULL, HFILL }
},
{ &hf_dsr_opt_srcrt_lasthopext,
{ "Last hop external", "dsr.option.srcrt.lasthopext",
FT_BOOLEAN, BASE_NONE,
NULL, 0x0,
NULL, HFILL }
},
{ &hf_dsr_opt_srcrt_reserved,
{ "Reserved", "dsr.option.srcrt.reserved",
FT_UINT8, BASE_HEX,
NULL, 0x0,
NULL, HFILL }
},
{ &hf_dsr_opt_srcrt_salvage,
{ "Salvage", "dsr.option.srcrt.salvage",
FT_UINT8, BASE_HEX,
NULL, 0x0,
NULL, HFILL }
},
{ &hf_dsr_opt_srcrt_segsleft,
{ "Segments left", "dsr.option.srcrt.segsleft",
FT_UINT8, BASE_DEC,
NULL, 0x3F,
NULL, HFILL }
},
{ &hf_dsr_opt_srcrt_address,
{ "Hop", "dsr.option.ack.address",
FT_IPv4, BASE_NONE,
NULL, 0x0,
"Hop IP address", HFILL }
},
/* DSR flow state */
{ &hf_dsr_fs_hopcount,
{ "Hop count", "dsr.fs.hopcount",
FT_UINT8, BASE_DEC,
NULL, 0x7F,
NULL, HFILL }
},
{ &hf_dsr_fs_id,
{ "Flow id", "dsr.fs.id",
FT_UINT16, BASE_HEX_DEC,
NULL, 0x00,
NULL, HFILL }
},
{ &hf_dsr_fs_opt_timeout_timeout,
{ "Timeout", "dsr.option.timeout.timeout",
FT_UINT16, BASE_DEC,
NULL, 0x0,
NULL, HFILL }
},
{ &hf_dsr_fs_opt_destflowid_id,
{ "Flow id", "dsr.option.destflowid.id",
FT_UINT16, BASE_HEX_DEC,
NULL, 0x0,
"New flow identifier", HFILL }
},
{ &hf_dsr_fs_opt_destflowid_dest,
{ "Destination IP", "dsr.option.destflowid.dest",
FT_IPv4, BASE_NONE,
NULL, 0x0,
"New IP destination address", HFILL }
},
{ &hf_dsr_opt_err_unknownflow_dest,
{ "Original IP destination", "dsr.option.err.unknownflow.dest",
FT_IPv4, BASE_NONE,
NULL, 0x00,
"Original IP destination address", HFILL }
},
{ &hf_dsr_opt_err_unknownflow_id,
{ "Flow id", "dsr.option.err.unknownflow.id",
FT_UINT16, BASE_HEX_DEC,
NULL, 0x00,
NULL, HFILL }
},
{ &hf_dsr_opt_err_defaultflowunknown_dest,
{ "Original IP destination", "dsr.option.err.defaultflowunknow.dest",
FT_IPv4, BASE_NONE,
NULL, 0x00,
"Original IP destination address", HFILL }
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_dsr,
&ett_dsr_options,
&ett_dsr_rreq_opt,
&ett_dsr_rrep_opt,
&ett_dsr_rerr_opt,
&ett_dsr_ackreq_opt,
&ett_dsr_ack_opt,
&ett_dsr_srcrt_opt,
&ett_dsr_padn_opt,
&ett_dsr_pad1_opt,
&ett_dsr_fs_timeout_opt,
&ett_dsr_fs_destflowid_opt,
&ett_dsr_rreq_hoplist,
&ett_dsr_rrep_hoplist,
&ett_dsr_srcrt_hoplist
};
/* Register the protocol name and description */
proto_dsr = proto_register_protocol(
"Dynamic Source Routing",
"DSR",
"dsr");
/* Required function calls to register the header fields and subtrees */
proto_register_field_array(proto_dsr, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_dsr(void)
{
dissector_handle_t dsr_handle;
ip_dissector_table = find_dissector_table("ip.proto");
dsr_handle = create_dissector_handle(dissect_dsr, proto_dsr);
dissector_add_uint("ip.proto", IP_PROTO_DSR, dsr_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vim: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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