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wireshark/packet-portmap.c

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/* packet-portmap.c
* Routines for portmap dissection
*
* $Id: packet-portmap.c,v 1.42 2004/01/09 00:56:04 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
* Copied from packet-smb.c
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "packet-rpc.h"
#include "packet-portmap.h"
#include "ipproto.h"
#include "epan/conversation.h"
#include "epan/packet_info.h"
/*
* See:
*
* RFC 1833, "Binding Protocols for ONC RPC Version 2".
*/
static int proto_portmap = -1;
static int hf_portmap_procedure_v1 = -1;
static int hf_portmap_procedure_v2 = -1;
static int hf_portmap_procedure_v3 = -1;
static int hf_portmap_procedure_v4 = -1;
static int hf_portmap_proto = -1;
static int hf_portmap_prog = -1;
static int hf_portmap_proc = -1;
static int hf_portmap_version = -1;
static int hf_portmap_port = -1;
static int hf_portmap_answer = -1;
static int hf_portmap_args = -1;
static int hf_portmap_result = -1;
static int hf_portmap_rpcb = -1;
static int hf_portmap_rpcb_prog = -1;
static int hf_portmap_rpcb_version = -1;
static int hf_portmap_rpcb_netid = -1;
static int hf_portmap_rpcb_addr = -1;
static int hf_portmap_rpcb_owner = -1;
static int hf_portmap_uaddr = -1;
static gint ett_portmap = -1;
static gint ett_portmap_rpcb = -1;
static gint ett_portmap_entry = -1;
static dissector_handle_t rpc_handle;
static dissector_handle_t rpc_tcp_handle;
/* Dissect a getport call */
static int
dissect_getport_call(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
proto_tree *tree)
{
guint32 proto;
guint32 prog;
/* make sure we remember protocol type until the reply packet */
if(!pinfo->fd->flags.visited){
rpc_call_info_value *rpc_call=pinfo->private_data;
if(rpc_call){
proto = tvb_get_ntohl(tvb, offset+8);
if(proto==IP_PROTO_UDP){ /* only do this for UDP */
rpc_call->private_data=(void *)PT_UDP;
}
}
}
if ( tree )
{
prog = tvb_get_ntohl(tvb, offset+0);
proto_tree_add_uint_format(tree, hf_portmap_prog, tvb,
offset, 4, prog, "Program: %s (%u)",
rpc_prog_name(prog), prog);
proto_tree_add_item(tree, hf_portmap_version, tvb,
offset+4, 4, FALSE);
proto = tvb_get_ntohl(tvb, offset+8);
proto_tree_add_uint_format(tree, hf_portmap_proto, tvb,
offset+8, 4, proto, "Proto: %s (%u)", ipprotostr(proto), proto);
proto_tree_add_item(tree, hf_portmap_port, tvb,
offset+12, 4, FALSE);
}
return offset+16;
}
static int
dissect_getport_reply(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
proto_tree *tree)
{
/* we might have learnt a <ipaddr><protocol><port> mapping for ONC-RPC*/
if(!pinfo->fd->flags.visited){
rpc_call_info_value *rpc_call=pinfo->private_data;
/* only do this for UDP, TCP does not need anything like this */
if(rpc_call && ((int)rpc_call->private_data==PT_UDP) ){
guint32 port;
port=tvb_get_ntohl(tvb, offset);
if(port){
conversation_t *conv;
conv=find_conversation(&pinfo->src, &pinfo->dst, (port_type)rpc_call->private_data, port, 0, NO_ADDR_B|NO_PORT_B);
if(!conv){
conv=conversation_new(&pinfo->src, &pinfo->dst, (port_type)rpc_call->private_data, port, 0, NO_ADDR2|NO_PORT2);
}
conversation_set_dissector(conv, rpc_handle);
}
}
}
offset = dissect_rpc_uint32(tvb, tree, hf_portmap_port,
offset);
return offset;
}
/* Dissect a 'set' call */
static int
dissect_set_call(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
proto_tree *tree)
{
guint32 proto;
guint32 prog;
if ( tree )
{
prog = tvb_get_ntohl(tvb, offset+0);
proto_tree_add_uint_format(tree, hf_portmap_prog, tvb,
offset, 4, prog, "Program: %s (%d)",
rpc_prog_name(prog), prog);
proto_tree_add_item(tree, hf_portmap_version, tvb,
offset+4, 4, FALSE);
proto = tvb_get_ntohl(tvb, offset+8);
proto_tree_add_uint_format(tree, hf_portmap_proto,tvb,
offset+8, 4, proto, "Proto: %s (%d)", ipprotostr(proto), proto);
proto_tree_add_item(tree, hf_portmap_port, tvb,
offset+12, 4, FALSE);
}
return offset+16;
}
/* Dissect a 'unset' call */
static int
dissect_unset_call(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
proto_tree *tree)
{
guint32 proto;
guint32 prog;
if ( tree )
{
prog = tvb_get_ntohl(tvb, offset+0);
proto_tree_add_uint_format(tree, hf_portmap_prog, tvb,
offset, 4, prog, "Program: %s (%d)",
rpc_prog_name(prog), prog);
proto_tree_add_item(tree, hf_portmap_version, tvb,
offset+4, 4, FALSE);
proto = tvb_get_ntohl(tvb, offset+8);
proto_tree_add_uint(tree, hf_portmap_proto, tvb,
offset+8, 4, proto);
proto_tree_add_item(tree, hf_portmap_port, tvb,
offset+12, 4, FALSE);
}
return offset+16;
}
static int
dissect_set_reply(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
proto_tree *tree)
{
offset = dissect_rpc_bool(tvb, tree, hf_portmap_answer,
offset);
return offset;
}
static int
dissect_dump_entry(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
proto_tree *tree)
{
int prog, version, proto, port;
proto_item *ti, *subtree;
prog = tvb_get_ntohl(tvb, offset+0);
version = tvb_get_ntohl(tvb, offset+4);
proto = tvb_get_ntohl(tvb, offset+8);
port = tvb_get_ntohl(tvb, offset+12);
if ( tree )
{
ti = proto_tree_add_text(tree, tvb, offset, 16,
"Map Entry: %s (%u) V%d",
rpc_prog_name(prog), prog, version);
subtree = proto_item_add_subtree(ti, ett_portmap_entry);
proto_tree_add_uint_format(subtree, hf_portmap_prog, tvb,
offset+0, 4, prog,
"Program: %s (%u)", rpc_prog_name(prog), prog);
proto_tree_add_uint(subtree, hf_portmap_version, tvb,
offset+4, 4, version);
proto_tree_add_uint_format(subtree, hf_portmap_proto, tvb,
offset+8, 4, proto,
"Protocol: %s (0x%02x)", ipprotostr(proto), proto);
proto_tree_add_uint(subtree, hf_portmap_port, tvb,
offset+12, 4, port);
}
offset += 16;
return offset;
}
static int
dissect_dump_reply(tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *tree)
{
offset = dissect_rpc_list(tvb, pinfo, tree, offset,
dissect_dump_entry);
return offset;
}
/* Dissect a callit call */
static int
dissect_callit_call(tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *tree)
{
guint32 prog, vers, proc;
prog = tvb_get_ntohl(tvb, offset+0);
if ( tree )
{
proto_tree_add_uint_format(tree, hf_portmap_prog, tvb,
offset, 4, prog, "Program: %s (%u)",
rpc_prog_name(prog), prog);
}
vers = tvb_get_ntohl(tvb, offset+4);
if ( tree )
{
proto_tree_add_uint(tree, hf_portmap_version, tvb,
offset+4, 4, vers);
}
proc = tvb_get_ntohl(tvb, offset+8);
if ( tree )
{
proto_tree_add_uint_format(tree, hf_portmap_proc, tvb,
offset+8, 4, proc, "Procedure: %s (%u)",
rpc_proc_name(prog, vers, proc), proc);
}
offset += 12;
/* Dissect the arguments for this procedure.
Make the columns non-writable, so the dissector won't change
them out from under us. */
col_set_writable(pinfo->cinfo, FALSE);
offset = dissect_rpc_indir_call(tvb, pinfo, tree, offset,
hf_portmap_args, prog, vers, proc);
return offset;
}
/* Dissect a callit reply */
static int
dissect_callit_reply(tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *tree)
{
if ( tree )
{
proto_tree_add_item(tree, hf_portmap_port, tvb,
offset, 4, FALSE);
}
offset += 4;
/* Dissect the result of this procedure.
Make the columns non-writable, so the dissector won't change
them out from under us. */
col_set_writable(pinfo->cinfo, FALSE);
offset = dissect_rpc_indir_reply(tvb, pinfo, tree, offset,
hf_portmap_result, hf_portmap_prog, hf_portmap_version,
hf_portmap_proc);
return offset;
}
/* proc number, "proc name", dissect_request, dissect_reply */
/* NULL as function pointer means: type of arguments is "void". */
static const vsff portmap1_proc[] = {
{ PORTMAPPROC_NULL, "NULL", NULL, NULL },
{ PORTMAPPROC_SET, "SET", NULL, NULL },
{ PORTMAPPROC_UNSET, "UNSET", NULL, NULL },
{ PORTMAPPROC_GETPORT, "GETPORT", NULL, NULL },
{ PORTMAPPROC_DUMP, "DUMP", NULL, NULL },
{ PORTMAPPROC_CALLIT, "CALLIT", NULL, NULL },
{ 0, NULL, NULL, NULL }
};
static const value_string portmap1_proc_vals[] = {
{ PORTMAPPROC_NULL, "NULL" },
{ PORTMAPPROC_SET, "SET" },
{ PORTMAPPROC_UNSET, "UNSET" },
{ PORTMAPPROC_GETPORT, "GETPORT" },
{ PORTMAPPROC_DUMP, "DUMP" },
{ PORTMAPPROC_CALLIT, "CALLIT" },
{ 0, NULL }
};
/* end of Portmap version 1 */
static const vsff portmap2_proc[] = {
{ PORTMAPPROC_NULL, "NULL",
NULL, NULL },
{ PORTMAPPROC_SET, "SET",
dissect_set_call, dissect_set_reply },
{ PORTMAPPROC_UNSET, "UNSET",
dissect_unset_call, dissect_set_reply },
{ PORTMAPPROC_GETPORT, "GETPORT",
dissect_getport_call, dissect_getport_reply },
{ PORTMAPPROC_DUMP, "DUMP",
NULL, dissect_dump_reply },
{ PORTMAPPROC_CALLIT, "CALLIT",
dissect_callit_call, dissect_callit_reply },
{ 0, NULL, NULL, NULL }
};
static const value_string portmap2_proc_vals[] = {
{ PORTMAPPROC_NULL, "NULL" },
{ PORTMAPPROC_SET, "SET" },
{ PORTMAPPROC_UNSET, "UNSET" },
{ PORTMAPPROC_GETPORT, "GETPORT" },
{ PORTMAPPROC_DUMP, "DUMP" },
{ PORTMAPPROC_CALLIT, "CALLIT" },
{ 0, NULL }
};
/* end of Portmap version 2 */
/* RFC 1833, Page 3 */
static int
dissect_rpcb(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree)
{
proto_item* rpcb_item = NULL;
proto_tree* rpcb_tree = NULL;
int old_offset = offset;
guint32 prog;
if (tree) {
rpcb_item = proto_tree_add_item(tree, hf_portmap_rpcb, tvb,
offset, -1, FALSE);
if (rpcb_item)
rpcb_tree = proto_item_add_subtree(rpcb_item, ett_portmap_rpcb);
}
prog = tvb_get_ntohl(tvb, offset);
if (rpcb_tree)
proto_tree_add_uint_format(rpcb_tree, hf_portmap_rpcb_prog, tvb,
offset, 4, prog,
"Program: %s (%u)", rpc_prog_name(prog), prog);
offset += 4;
offset = dissect_rpc_uint32(tvb, rpcb_tree,
hf_portmap_rpcb_version, offset);
offset = dissect_rpc_string(tvb, rpcb_tree,
hf_portmap_rpcb_netid, offset, NULL);
offset = dissect_rpc_string(tvb, rpcb_tree,
hf_portmap_rpcb_addr, offset, NULL);
offset = dissect_rpc_string(tvb, rpcb_tree,
hf_portmap_rpcb_owner, offset, NULL);
/* now we know, that rpcb is shorter */
if (rpcb_item) {
proto_item_set_len(rpcb_item, offset - old_offset);
}
return offset;
}
/* RFC 1833, Page 7 */
static int
dissect_rpcb3_getaddr_call(tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *tree)
{
offset = dissect_rpcb(tvb, offset, pinfo, tree);
return offset;
}
/* RFC 1833, Page 7 */
static int
dissect_rpcb3_getaddr_reply(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
proto_tree *tree)
{
offset = dissect_rpc_string(tvb, tree,
hf_portmap_uaddr, offset, NULL);
return offset;
}
/* RFC 1833, Page 7 */
static int
dissect_rpcb3_dump_reply(tvbuff_t *tvb, int offset, packet_info *pinfo,
proto_tree *tree)
{
offset = dissect_rpc_list(tvb, pinfo, tree, offset, dissect_rpcb);
return offset;
}
/* RFC 1833, page 4 */
static int
dissect_rpcb_rmtcallres(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
proto_tree *tree)
{
/* Dissect the remote universal address. */
offset = dissect_rpc_string(tvb, tree,
hf_portmap_rpcb_addr, offset, NULL);
/* Dissect the result of this procedure.
Make the columns non-writable, so the dissector won't change
them out from under us. */
col_set_writable(pinfo->cinfo, FALSE);
offset = dissect_rpc_indir_reply(tvb, pinfo, tree, offset,
hf_portmap_result, hf_portmap_prog, hf_portmap_version,
hf_portmap_proc);
return offset;
}
/* Portmapper version 3, RFC 1833, Page 7 */
static const vsff portmap3_proc[] = {
{ RPCBPROC_NULL, "NULL",
NULL, NULL },
{ RPCBPROC_SET, "SET",
NULL, NULL },
{ RPCBPROC_UNSET, "UNSET",
NULL, NULL },
{ RPCBPROC_GETADDR, "GETADDR",
dissect_rpcb3_getaddr_call, dissect_rpcb3_getaddr_reply},
{ RPCBPROC_DUMP, "DUMP",
NULL, dissect_rpcb3_dump_reply },
{ RPCBPROC_CALLIT, "CALLIT",
dissect_callit_call, dissect_rpcb_rmtcallres },
{ RPCBPROC_GETTIME, "GETTIME",
NULL, NULL },
{ RPCBPROC_UADDR2TADDR, "UADDR2TADDR",
NULL, NULL },
{ RPCBPROC_TADDR2UADDR, "TADDR2UADDR",
NULL, NULL },
{ 0, NULL, NULL, NULL }
};
static const value_string portmap3_proc_vals[] = {
{ RPCBPROC_NULL, "NULL" },
{ RPCBPROC_SET, "SET" },
{ RPCBPROC_UNSET, "UNSET" },
{ RPCBPROC_GETADDR, "GETADDR" },
{ RPCBPROC_DUMP, "DUMP" },
{ RPCBPROC_CALLIT, "CALLIT" },
{ RPCBPROC_GETTIME, "GETTIME" },
{ RPCBPROC_UADDR2TADDR, "UADDR2TADDR" },
{ RPCBPROC_TADDR2UADDR, "TADDR2UADDR" },
{ 0, NULL }
};
/* end of Portmap version 3 */
/* Portmapper version 4, RFC 1833, Page 8 */
static const vsff portmap4_proc[] = {
{ RPCBPROC_NULL, "NULL",
NULL, NULL },
{ RPCBPROC_SET, "SET",
NULL, NULL },
{ RPCBPROC_UNSET, "UNSET",
NULL, NULL },
{ RPCBPROC_GETADDR, "GETADDR",
dissect_rpcb3_getaddr_call, dissect_rpcb3_getaddr_reply},
{ RPCBPROC_DUMP, "DUMP",
NULL, dissect_rpcb3_dump_reply },
{ RPCBPROC_BCAST, "BCAST",
dissect_callit_call, dissect_rpcb_rmtcallres },
{ RPCBPROC_GETTIME, "GETTIME",
NULL, NULL },
{ RPCBPROC_UADDR2TADDR, "UADDR2TADDR",
NULL, NULL },
{ RPCBPROC_TADDR2UADDR, "TADDR2UADDR",
NULL, NULL },
{ RPCBPROC_GETVERSADDR, "GETVERSADDR",
NULL, NULL },
{ RPCBPROC_INDIRECT, "INDIRECT",
dissect_callit_call, dissect_rpcb_rmtcallres },
{ RPCBPROC_GETADDRLIST, "GETADDRLIST",
NULL, NULL },
{ RPCBPROC_GETSTAT, "GETSTAT",
NULL, NULL },
{ 0, NULL, NULL, NULL }
};
static const value_string portmap4_proc_vals[] = {
{ RPCBPROC_NULL, "NULL" },
{ RPCBPROC_SET, "SET" },
{ RPCBPROC_UNSET, "UNSET" },
{ RPCBPROC_GETADDR, "GETADDR" },
{ RPCBPROC_DUMP, "DUMP" },
{ RPCBPROC_BCAST, "BCAST" },
{ RPCBPROC_GETTIME, "GETTIME" },
{ RPCBPROC_UADDR2TADDR, "UADDR2TADDR" },
{ RPCBPROC_TADDR2UADDR, "TADDR2UADDR" },
{ RPCBPROC_GETVERSADDR, "GETVERSADDR" },
{ RPCBPROC_INDIRECT, "INDIRECT" },
{ RPCBPROC_GETADDRLIST, "GETADDRLIST" },
{ RPCBPROC_GETSTAT, "GETSTAT" },
{ 0, NULL }
};
/* end of Portmap version 4 */
void
proto_register_portmap(void)
{
static hf_register_info hf[] = {
{ &hf_portmap_procedure_v1, {
"V1 Procedure", "portmap.procedure_v1", FT_UINT32, BASE_DEC,
VALS(portmap1_proc_vals), 0, "V1 Procedure", HFILL }},
{ &hf_portmap_procedure_v2, {
"V2 Procedure", "portmap.procedure_v2", FT_UINT32, BASE_DEC,
VALS(portmap2_proc_vals), 0, "V2 Procedure", HFILL }},
{ &hf_portmap_procedure_v3, {
"V3 Procedure", "portmap.procedure_v3", FT_UINT32, BASE_DEC,
VALS(portmap3_proc_vals), 0, "V3 Procedure", HFILL }},
{ &hf_portmap_procedure_v4, {
"V4 Procedure", "portmap.procedure_v4", FT_UINT32, BASE_DEC,
VALS(portmap4_proc_vals), 0, "V4 Procedure", HFILL }},
{ &hf_portmap_prog, {
"Program", "portmap.prog", FT_UINT32, BASE_DEC,
NULL, 0, "Program", HFILL }},
{ &hf_portmap_port, {
"Port", "portmap.port", FT_UINT32, BASE_DEC,
NULL, 0, "Port", HFILL }},
{ &hf_portmap_proc, {
"Procedure", "portmap.proc", FT_UINT32, BASE_DEC,
NULL, 0, "Procedure", HFILL }},
{ &hf_portmap_proto, {
"Protocol", "portmap.proto", FT_UINT32, BASE_DEC,
NULL, 0, "Protocol", HFILL }},
{ &hf_portmap_version, {
"Version", "portmap.version", FT_UINT32, BASE_DEC,
NULL, 0, "Version", HFILL }},
{ &hf_portmap_answer, {
"Answer", "portmap.answer", FT_BOOLEAN, BASE_DEC,
NULL, 0, "Answer", HFILL }},
{ &hf_portmap_args, {
"Arguments", "portmap.args", FT_BYTES, BASE_HEX,
NULL, 0, "Arguments", HFILL }},
{ &hf_portmap_result, {
"Result", "portmap.result", FT_BYTES, BASE_HEX,
NULL, 0, "Result", HFILL }},
{ &hf_portmap_rpcb, {
"RPCB", "portmap.rpcb", FT_NONE, 0,
NULL, 0, "RPCB", HFILL }},
{ &hf_portmap_rpcb_prog, {
"Program", "portmap.rpcb.prog", FT_UINT32, BASE_DEC,
NULL, 0, "Program", HFILL }},
{ &hf_portmap_rpcb_version, {
"Version", "portmap.rpcb.version", FT_UINT32, BASE_DEC,
NULL, 0, "Version", HFILL }},
{ &hf_portmap_rpcb_netid, {
"Network Id", "portmap.rpcb.netid", FT_STRING, BASE_DEC,
NULL, 0, "Network Id", HFILL }},
{ &hf_portmap_rpcb_addr, { /* address in rpcb structure in request */
"Universal Address", "portmap.rpcb.addr", FT_STRING, BASE_DEC,
NULL, 0, "Universal Address", HFILL }},
{ &hf_portmap_rpcb_owner, {
"Owner of this Service", "portmap.rpcb.owner", FT_STRING, BASE_DEC,
NULL, 0, "Owner of this Service", HFILL }},
{ &hf_portmap_uaddr, { /* address in RPCBPROC_GETADDR reply */
"Universal Address", "portmap.uaddr", FT_STRING, BASE_DEC,
NULL, 0, "Universal Address", HFILL }},
};
static gint *ett[] = {
&ett_portmap,
&ett_portmap_rpcb,
&ett_portmap_entry
};
proto_portmap = proto_register_protocol("Portmap", "Portmap", "portmap");
proto_register_field_array(proto_portmap, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_portmap(void)
{
/* Register the protocol as RPC */
rpc_init_prog(proto_portmap, PORTMAP_PROGRAM, ett_portmap);
/* Register the procedure tables */
rpc_init_proc_table(PORTMAP_PROGRAM, 1, portmap1_proc, hf_portmap_procedure_v1);
rpc_init_proc_table(PORTMAP_PROGRAM, 2, portmap2_proc, hf_portmap_procedure_v2);
rpc_init_proc_table(PORTMAP_PROGRAM, 3, portmap3_proc, hf_portmap_procedure_v3);
rpc_init_proc_table(PORTMAP_PROGRAM, 4, portmap4_proc, hf_portmap_procedure_v4);
rpc_handle = find_dissector("rpc");
rpc_tcp_handle = find_dissector("rpc-tcp");
}
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