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wireshark/packet-vines.c

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/* packet-vines.c
* Routines for Banyan VINES protocol packet disassembly
*
* $Id: packet-vines.c,v 1.33 2001/06/18 02:17:53 guy Exp $
*
* Don Lafontaine <lafont02@cn.ca>
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
* Joerg Mayer <jmayer@loplof.de>
*
*
* 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
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#include <string.h>
#include <glib.h>
#include "packet.h"
#include "packet-vines.h"
#include "etypes.h"
#include "ppptypes.h"
#include "ipproto.h"
#define UDP_PORT_VINES 573
static int proto_vines = -1;
static int hf_vines_protocol = -1;
static gint ett_vines = -1;
static int proto_vines_frp = -1;
static gint ett_vines_frp = -1;
static int proto_vines_spp = -1;
static gint ett_vines_spp = -1;
static void dissect_vines_frp(tvbuff_t *, packet_info *, proto_tree *);
#if 0
static void dissect_vines_arp(tvbuff_t *, packet_info *, proto_tree *);
static void dissect_vines_icp(tvbuff_t *, packet_info *, proto_tree *);
static void dissect_vines_ipc(tvbuff_t *, packet_info *, proto_tree *);
static void dissect_vines_rtp(tvbuff_t *, packet_info *, proto_tree *);
#endif
static void dissect_vines_spp(tvbuff_t *, packet_info *, proto_tree *);
static void dissect_vines(tvbuff_t *, packet_info *, proto_tree *);
void
capture_vines(const u_char *pd, int offset, packet_counts *ld)
{
ld->vines++;
}
static dissector_handle_t vines_handle;
/* AFAIK Vines FRP (Fragmentation Protocol) is used on all media except
* Ethernet and TR (and probably FDDI) - Fragmentation on these media types
* is not possible
* FIXME: Do we need to use this header with PPP too?
*/
static void
dissect_vines_frp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint8 vines_frp_ctrl;
proto_tree *vines_frp_tree;
proto_item *ti;
gchar frp_flags_str[32];
tvbuff_t *next_tvb;
if (check_col(pinfo->fd, COL_PROTOCOL))
col_set_str(pinfo->fd, COL_PROTOCOL, "Vines FRP");
if (check_col(pinfo->fd, COL_INFO))
col_clear(pinfo->fd, COL_INFO);
if (tree) {
ti = proto_tree_add_item(tree, proto_vines_frp, tvb, 0, 2,
FALSE);
vines_frp_tree = proto_item_add_subtree(ti, ett_vines_frp);
vines_frp_ctrl = tvb_get_guint8(tvb, 0);
/*
* 1: first fragment of vines packet
* 2: last fragment of vines packet
* 4 ... 80: unused
*/
switch (vines_frp_ctrl) {
case 0:
strcpy(frp_flags_str, "middle");
break;
case 1:
strcpy(frp_flags_str, "first");
break;
case 2:
strcpy(frp_flags_str, "last");
break;
case 3:
strcpy(frp_flags_str, "only");
break;
default:
strcpy(frp_flags_str, "please report: unknown");
break;
}
proto_tree_add_text(vines_frp_tree, tvb, 0, 1,
"Control Flags: 0x%02x = %s fragment",
vines_frp_ctrl, frp_flags_str);
proto_tree_add_text(vines_frp_tree, tvb, 1, 1,
"Sequence Number: 0x%02x",
tvb_get_guint8(tvb, 1));
}
/* Decode the "real" Vines now */
next_tvb = tvb_new_subset(tvb, 2, -1, -1);
call_dissector(vines_handle, next_tvb, pinfo, tree);
}
void
proto_register_vines_frp(void)
{
static gint *ett[] = {
&ett_vines_frp,
};
proto_vines_frp = proto_register_protocol(
"Banyan Vines Fragmentation Protocol", "Vines FRP", "vines_frp");
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_vines_frp(void)
{
/*
* Get handle for the Vines dissector.
*/
vines_handle = find_dissector("vines");
dissector_add("ip.proto", IP_PROTO_VINES, dissect_vines_frp,
proto_vines_frp);
/* XXX: AFAIK, src and dst port must be the same; should
the dissector check for that? */
dissector_add("udp.port", UDP_PORT_VINES, dissect_vines_frp,
proto_vines_frp);
}
static dissector_table_t vines_dissector_table;
static void
dissect_vines(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
int offset = 0;
e_vip viph;
proto_tree *vip_tree;
proto_item *ti;
/* gchar tos_str[32]; */
const guint8 *dst_addr, *src_addr;
int is_broadcast = 0;
int hops = 0;
tvbuff_t *next_tvb;
if (check_col(pinfo->fd, COL_PROTOCOL))
col_set_str(pinfo->fd, COL_PROTOCOL, "Vines");
if (check_col(pinfo->fd, COL_INFO))
col_clear(pinfo->fd, COL_INFO);
/* To do: check for runts, errs, etc. */
/* Avoids alignment problems on many architectures. */
tvb_memcpy(tvb, (guint8 *)&viph, offset, sizeof(e_vip));
viph.vip_chksum = ntohs(viph.vip_chksum);
viph.vip_pktlen = ntohs(viph.vip_pktlen);
viph.vip_dnet = ntohl(viph.vip_dnet);
viph.vip_dsub = ntohs(viph.vip_dsub);
viph.vip_snet = ntohl(viph.vip_snet);
viph.vip_ssub = ntohs(viph.vip_ssub);
switch (viph.vip_proto) {
case VIP_PROTO_IPC:
if (check_col(pinfo->fd, COL_PROTOCOL))
col_set_str(pinfo->fd, COL_PROTOCOL, "Vines IPC");
if (check_col(pinfo->fd, COL_INFO))
col_add_fstr(pinfo->fd, COL_INFO, "IPC (%02x)", viph.vip_proto);
break;
case VIP_PROTO_SPP:
if (check_col(pinfo->fd, COL_PROTOCOL))
col_set_str(pinfo->fd, COL_PROTOCOL, "Vines SPP");
if (check_col(pinfo->fd, COL_INFO))
col_add_fstr(pinfo->fd, COL_INFO, "SPP (%02x)", viph.vip_proto);
break;
case VIP_PROTO_ARP:
if (check_col(pinfo->fd, COL_PROTOCOL))
col_set_str(pinfo->fd, COL_PROTOCOL, "Vines ARP");
if (check_col(pinfo->fd, COL_INFO))
col_add_fstr(pinfo->fd, COL_INFO, "ARP (%02x)", viph.vip_proto);
break;
case VIP_PROTO_RTP:
if (check_col(pinfo->fd, COL_PROTOCOL))
col_set_str(pinfo->fd, COL_PROTOCOL, "Vines RTP");
if (check_col(pinfo->fd, COL_INFO))
col_add_fstr(pinfo->fd, COL_INFO, "RTP (%02x)", viph.vip_proto);
break;
case VIP_PROTO_ICP:
if (check_col(pinfo->fd, COL_PROTOCOL))
col_set_str(pinfo->fd, COL_PROTOCOL, "Vines ICP");
if (check_col(pinfo->fd, COL_INFO))
col_add_fstr(pinfo->fd, COL_INFO, "ICP (%02x)", viph.vip_proto);
break;
default:
if (check_col(pinfo->fd, COL_PROTOCOL))
col_set_str(pinfo->fd, COL_PROTOCOL, "Vines IP");
if (check_col(pinfo->fd, COL_INFO))
col_add_fstr(pinfo->fd, COL_INFO, "Unknown VIP protocol (%02x)",
viph.vip_proto);
}
src_addr = tvb_get_ptr(tvb, offset+12, VINES_ADDR_LEN);
SET_ADDRESS(&pinfo->net_src, AT_VINES, VINES_ADDR_LEN, src_addr);
SET_ADDRESS(&pinfo->src, AT_VINES, VINES_ADDR_LEN, src_addr);
dst_addr = tvb_get_ptr(tvb, offset+6, VINES_ADDR_LEN);
SET_ADDRESS(&pinfo->net_dst, AT_VINES, VINES_ADDR_LEN,dst_addr);
SET_ADDRESS(&pinfo->dst, AT_VINES, VINES_ADDR_LEN, dst_addr);
/* helpers to decode flags */
/* FIXME: Not used yet */
if ((viph.vip_dnet == 0xffffffff) && (viph.vip_dsub == 0xffff)) {
is_broadcast = 1;
}
hops = viph.vip_tctl & 0xf;
/*
viph.ip_tos = IPTOS_TOS(viph.ip_tos);
switch (viph.ip_tos) {
case IPTOS_NONE:
strcpy(tos_str, "None");
break;
case IPTOS_LOWDELAY:
strcpy(tos_str, "Minimize delay");
break;
case IPTOS_THROUGHPUT:
strcpy(tos_str, "Maximize throughput");
break;
case IPTOS_RELIABILITY:
strcpy(tos_str, "Maximize reliability");
break;
case IPTOS_LOWCOST:
strcpy(tos_str, "Minimize cost");
break;
default:
strcpy(tos_str, "Unknon. Malformed?");
break;
}
*/
if (tree) {
ti = proto_tree_add_protocol_format(tree, proto_vines, tvb,
offset, (viph.vip_pktlen),
"Vines IP");
vip_tree = proto_item_add_subtree(ti, ett_vines);
proto_tree_add_text(vip_tree, tvb, offset, 2,
"Packet checksum: 0x%04x",
viph.vip_chksum);
proto_tree_add_text(vip_tree, tvb, offset + 2, 2,
"Packet length: 0x%04x (%d)",
viph.vip_pktlen, viph.vip_pktlen);
proto_tree_add_text(vip_tree, tvb, offset + 4, 1,
"Transport control: 0x%02x",
viph.vip_tctl);
proto_tree_add_uint(vip_tree, hf_vines_protocol, tvb,
offset + 5, 1,
viph.vip_proto);
proto_tree_add_text(vip_tree, tvb, offset + 6,
VINES_ADDR_LEN,
"Destination: %s",
vines_addr_to_str(dst_addr));
proto_tree_add_text(vip_tree, tvb, offset + 12,
VINES_ADDR_LEN,
"Source: %s",
vines_addr_to_str(src_addr));
}
offset += 18;
next_tvb = tvb_new_subset(tvb, offset, -1, -1);
if (!dissector_try_port(vines_dissector_table, viph.vip_proto,
next_tvb, pinfo, tree))
dissect_data(next_tvb, 0, pinfo, tree);
}
void
proto_register_vines(void)
{
static gint *ett[] = {
&ett_vines,
};
static hf_register_info hf[] = {
{ &hf_vines_protocol,
{ "Protocol", "vines.protocol",
FT_UINT8, BASE_HEX, NULL, 0x0,
"Vines protocol", HFILL }}
};
proto_vines = proto_register_protocol("Banyan Vines", "Vines", "vines");
proto_register_field_array(proto_vines, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
/* subdissector code */
vines_dissector_table = register_dissector_table("vines.proto");
register_dissector("vines", dissect_vines, proto_vines);
}
void
proto_reg_handoff_vines(void)
{
dissector_add("ethertype", ETHERTYPE_VINES, dissect_vines, proto_vines);
dissector_add("ppp.protocol", PPP_VINES, dissect_vines, proto_vines);
}
static void
dissect_vines_spp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
int offset = 0;
e_vspp viph;
proto_tree *vspp_tree;
proto_item *ti;
if (check_col(pinfo->fd, COL_PROTOCOL))
col_set_str(pinfo->fd, COL_PROTOCOL, "VSPP");
if (check_col(pinfo->fd, COL_INFO))
col_clear(pinfo->fd, COL_INFO);
/* To do: check for runts, errs, etc. */
/* Avoids alignment problems on many architectures. */
tvb_memcpy(tvb, (guint8 *)&viph, offset, sizeof(e_vspp));
viph.vspp_sport = ntohs(viph.vspp_sport);
viph.vspp_dport = ntohs(viph.vspp_dport);
viph.vspp_lclid = ntohs(viph.vspp_lclid);
viph.vspp_rmtid = ntohs(viph.vspp_rmtid);
switch (viph.vspp_pkttype) {
case VSPP_PKTTYPE_DATA:
if (check_col(pinfo->fd, COL_PROTOCOL))
col_set_str(pinfo->fd, COL_PROTOCOL, "VSPP Data");
break;
case VSPP_PKTTYPE_DISC:
if (check_col(pinfo->fd, COL_PROTOCOL))
col_set_str(pinfo->fd, COL_PROTOCOL, "VSPP Disconnect");
break;
case VSPP_PKTTYPE_PROBE:
if (check_col(pinfo->fd, COL_PROTOCOL))
col_set_str(pinfo->fd, COL_PROTOCOL, "VSPP Probe");
break;
case VSPP_PKTTYPE_ACK:
if (check_col(pinfo->fd, COL_PROTOCOL))
col_set_str(pinfo->fd, COL_PROTOCOL, "VSPP Ack");
break;
default:
if (check_col(pinfo->fd, COL_PROTOCOL))
col_set_str(pinfo->fd, COL_PROTOCOL, "VSPP Unknown");
}
if (check_col(pinfo->fd, COL_INFO))
col_add_fstr(pinfo->fd, COL_INFO,
"NS=%04x NR=%04x Window=%04x RID=%04x LID=%04x D=%04x S=%04x",
viph.vspp_seqno, viph.vspp_ack, viph.vspp_win,
viph.vspp_rmtid, viph.vspp_lclid, viph.vspp_dport,
viph.vspp_sport);
/*
iph.ip_tos = IPTOS_TOS(iph.ip_tos);
switch (iph.ip_tos) {
case IPTOS_NONE:
strcpy(tos_str, "None");
break;
case IPTOS_LOWDELAY:
strcpy(tos_str, "Minimize delay");
break;
case IPTOS_THROUGHPUT:
strcpy(tos_str, "Maximize throughput");
break;
case IPTOS_RELIABILITY:
strcpy(tos_str, "Maximize reliability");
break;
case IPTOS_LOWCOST:
strcpy(tos_str, "Minimize cost");
break;
default:
strcpy(tos_str, "Unknon. Malformed?");
break;
}
*/
if (tree) {
ti = proto_tree_add_item(tree, proto_vines_spp, tvb, offset,
sizeof(viph), FALSE);
vspp_tree = proto_item_add_subtree(ti, ett_vines_spp);
proto_tree_add_text(vspp_tree, tvb, offset, 2,
"Source port: 0x%04x", viph.vspp_sport);
proto_tree_add_text(vspp_tree, tvb, offset + 2, 2,
"Destination port: 0x%04x",
viph.vspp_dport);
proto_tree_add_text(vspp_tree, tvb, offset + 4, 1,
"Packet type: 0x%02x", viph.vspp_pkttype);
proto_tree_add_text(vspp_tree, tvb, offset + 5, 1,
"Control: 0x%02x", viph.vspp_control);
proto_tree_add_text(vspp_tree, tvb, offset + 6, 2,
"Local Connection ID: 0x%04x",
viph.vspp_lclid);
proto_tree_add_text(vspp_tree, tvb, offset + 8, 2,
"Remote Connection ID: 0x%04x",
viph.vspp_rmtid);
proto_tree_add_text(vspp_tree, tvb, offset + 10, 2,
"Sequence number: 0x%04x",
viph.vspp_seqno);
proto_tree_add_text(vspp_tree, tvb, offset + 12, 2,
"Ack number: 0x%04x", viph.vspp_ack);
proto_tree_add_text(vspp_tree, tvb, offset + 14, 2,
"Window: 0x%04x", viph.vspp_win);
}
offset += 16; /* sizeof SPP */
dissect_data(tvb, offset, pinfo, tree);
}
void
proto_register_vines_spp(void)
{
static gint *ett[] = {
&ett_vines_spp,
};
proto_vines_spp = proto_register_protocol("Banyan Vines SPP",
"Vines SPP", "vines_spp");
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_vines_spp(void)
{
dissector_add("vines.proto", VIP_PROTO_SPP, dissect_vines_spp,
proto_vines_spp);
}
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