1999-10-12 23:12:06 +00:00
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/* packet-ripng.c
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* Routines for RIPng disassembly
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* (c) Copyright Jun-ichiro itojun Hagino <itojun@itojun.org>
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* derived from packet-rip.c
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*
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2000-11-17 21:00:40 +00:00
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* $Id: packet-ripng.c,v 1.15 2000/11/17 21:00:36 gram Exp $
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1999-10-12 23:12:06 +00:00
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 1998 Gerald Combs
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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2000-11-17 21:00:40 +00:00
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#include <string.h>
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1999-10-12 23:12:06 +00:00
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#include <glib.h>
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#include "packet.h"
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#include "packet-ipv6.h"
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#include "packet-ripng.h"
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1999-10-18 00:37:35 +00:00
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#ifndef offsetof
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#define offsetof(type, member) ((size_t)(&((type *)0)->member))
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#endif
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1999-10-12 23:12:06 +00:00
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static int proto_ripng = -1;
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1999-10-15 13:21:14 +00:00
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static int hf_ripng_cmd = -1;
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static int hf_ripng_version = -1;
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1999-10-12 23:12:06 +00:00
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1999-11-16 11:44:20 +00:00
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static gint ett_ripng = -1;
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static gint ett_ripng_addr = -1;
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2000-04-08 07:07:42 +00:00
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#define UDP_PORT_RIPNG 521
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static void
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1999-10-12 23:12:06 +00:00
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dissect_ripng(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
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struct rip6 rip6;
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struct netinfo6 ni6;
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proto_tree *ripng_tree = NULL;
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1999-10-18 00:37:35 +00:00
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proto_tree *subtree = NULL;
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proto_item *ti;
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1999-10-14 03:50:51 +00:00
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static const value_string cmdvals[] = {
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{ RIP6_REQUEST, "Request" },
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{ RIP6_RESPONSE, "Response" },
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{ 0, NULL },
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};
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const char *cmd;
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1999-10-12 23:12:06 +00:00
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Add the "Edit:Protocols..." feature which currently only implements
the following:
It is now possible to enable/disable a particular protocol decoding
(i.e. the protocol dissector is void or not). When a protocol
is disabled, it is displayed as Data and of course, all linked
sub-protocols are disabled as well.
Disabling a protocol could be interesting:
- in case of buggy dissectors
- in case of wrong heuristics
- for performance reasons
- to decode the data as another protocol (TODO)
Currently (if I am not wrong), all dissectors but NFS can be disabled
(and dissectors that do not register protocols :-)
I do not like the way the RPC sub-dissectors are disabled (in the
sub-dissectors) since this could be done in the RPC dissector itself,
knowing the sub-protocol hfinfo entry (this is why, I've not modified
the NFS one yet).
Two functions are added in proto.c :
gboolean proto_is_protocol_enabled(int n);
void proto_set_decoding(int n, gboolean enabled);
and two MACROs which can be used in dissectors:
OLD_CHECK_DISPLAY_AS_DATA(index, pd, offset, fd, tree)
CHECK_DISPLAY_AS_DATA(index, tvb, pinfo, tree)
See also the XXX in proto_dlg.c and proto.c around the new functions.
svn path=/trunk/; revision=2267
2000-08-13 14:09:15 +00:00
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OLD_CHECK_DISPLAY_AS_DATA(proto_ripng, pd, offset, fd, tree);
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1999-10-12 23:12:06 +00:00
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/* avoid alignment problem */
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memcpy(&rip6, &pd[offset], sizeof(rip6));
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1999-10-14 03:50:51 +00:00
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cmd = val_to_str(rip6.rip6_cmd, cmdvals, "Unknown");
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1999-10-12 23:12:06 +00:00
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if (check_col(fd, COL_PROTOCOL))
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2000-03-07 05:28:39 +00:00
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col_add_fstr(fd, COL_PROTOCOL, "RIPng version %u", rip6.rip6_vers);
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1999-10-12 23:12:06 +00:00
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if (check_col(fd, COL_INFO))
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1999-10-14 03:50:51 +00:00
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col_add_fstr(fd, COL_INFO, "%s", cmd);
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1999-10-12 23:12:06 +00:00
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if (tree) {
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2000-05-31 05:09:07 +00:00
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ti = proto_tree_add_item(tree, proto_ripng, NullTVB, offset, END_OF_FRAME, FALSE);
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1999-11-16 11:44:20 +00:00
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ripng_tree = proto_item_add_subtree(ti, ett_ripng);
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1999-10-12 23:12:06 +00:00
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2000-05-11 08:18:09 +00:00
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proto_tree_add_uint_format(ripng_tree, hf_ripng_cmd, NullTVB, offset, 1,
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1999-10-15 13:21:14 +00:00
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rip6.rip6_cmd,
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1999-10-14 03:50:51 +00:00
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"Command: %s (%u)", cmd, rip6.rip6_cmd);
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2000-05-31 05:09:07 +00:00
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proto_tree_add_uint(ripng_tree, hf_ripng_version, NullTVB, offset + 1, 1,
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1999-10-15 13:21:14 +00:00
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rip6.rip6_vers);
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1999-10-12 23:12:06 +00:00
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offset += 4;
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while ((pi.captured_len - offset) >= sizeof(struct netinfo6)){
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2000-05-17 04:09:32 +00:00
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if (! BYTES_ARE_IN_FRAME(offset, sizeof(ni6))) {
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proto_tree_add_text(ripng_tree, NullTVB, offset, sizeof(ni6), "No IP Address information");
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break;
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}
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memcpy(&ni6, &pd[offset], sizeof(ni6));
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if (ni6.rip6_tag) {
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ti = proto_tree_add_text(ripng_tree, NullTVB, offset,
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sizeof(ni6), "IP Address: %s/%u, Metric: %u, tag: 0x%04x",
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ip6_to_str(&ni6.rip6_dest),
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ni6.rip6_plen,
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ni6.rip6_metric,
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ntohs(ni6.rip6_tag));
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} else {
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ti = proto_tree_add_text(ripng_tree, NullTVB, offset,
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sizeof(ni6), "IP Address: %s/%u, Metric: %u",
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ip6_to_str(&ni6.rip6_dest),
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ni6.rip6_plen,
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ni6.rip6_metric);
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}
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subtree = proto_item_add_subtree(ti, ett_ripng_addr);
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proto_tree_add_text(subtree, NullTVB,
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offset + offsetof(struct netinfo6, rip6_dest),
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sizeof(ni6.rip6_dest), "IP Address: %s",
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ip6_to_str(&ni6.rip6_dest));
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proto_tree_add_text(subtree, NullTVB,
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offset + offsetof(struct netinfo6, rip6_tag),
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sizeof(ni6.rip6_tag), "Tag: 0x%04x",
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1999-10-12 23:12:06 +00:00
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ntohs(ni6.rip6_tag));
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2000-05-17 04:09:32 +00:00
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proto_tree_add_text(subtree, NullTVB,
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offset + offsetof(struct netinfo6, rip6_plen),
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sizeof(ni6.rip6_plen), "Prefix length: %u",
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ni6.rip6_plen);
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proto_tree_add_text(subtree, NullTVB,
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offset + offsetof(struct netinfo6, rip6_metric),
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sizeof(ni6.rip6_metric), "Metric: %u",
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1999-10-12 23:12:06 +00:00
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ni6.rip6_metric);
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2000-05-17 04:09:32 +00:00
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offset += sizeof(ni6);
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}
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1999-10-12 23:12:06 +00:00
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}
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}
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void
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proto_register_ripng(void)
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{
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1999-10-15 13:21:14 +00:00
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static hf_register_info hf[] = {
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{ &hf_ripng_cmd,
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{ "Command", "ripng.cmd",
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FT_UINT8, BASE_DEC, NULL, 0x0, "" }},
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{ &hf_ripng_version,
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{ "Version", "ripng.version",
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FT_UINT8, BASE_DEC, NULL, 0x0, "" }},
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};
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1999-11-16 11:44:20 +00:00
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static gint *ett[] = {
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&ett_ripng,
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&ett_ripng_addr,
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};
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1999-10-15 13:21:14 +00:00
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proto_ripng = proto_register_protocol("RIPng", "ripng");
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proto_register_field_array(proto_ripng, hf, array_length(hf));
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1999-11-16 11:44:20 +00:00
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proto_register_subtree_array(ett, array_length(ett));
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1999-10-12 23:12:06 +00:00
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}
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2000-04-08 07:07:42 +00:00
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void
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proto_reg_handoff_ripng(void)
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{
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Allow either old-style (pre-tvbuff) or new-style (tvbuffified)
dissectors to be registered as dissectors for particular ports,
registered as heuristic dissectors, and registered as dissectors for
conversations, and have routines to be used both by old-style and
new-style dissectors to call registered dissectors.
Have the code that calls those dissectors translate the arguments as
necessary. (For conversation dissectors, replace
"find_conversation_dissector()", which just returns a pointer to the
dissector, with "old_try_conversation_dissector()" and
"try_conversation_dissector()", which actually call the dissector, so
that there's a single place at which we can do that translation. Also
make "dissector_lookup()" static and, instead of calling it and, if it
returns a non-null pointer, calling that dissector, just use
"old_dissector_try_port()" or "dissector_try_port()", for the same
reason.)
This allows some dissectors that took old-style arguments and
immediately translated them to new-style arguments to just take
new-style arguments; make them do so. It also allows some new-style
dissectors not to have to translate arguments before calling routines to
look up and call dissectors; make them not do so.
Get rid of checks for too-short frames in new-style dissectors - the
tvbuff code does those checks for you.
Give the routines to register old-style dissectors, and to call
dissectors from old-style dissectors, names beginning with "old_", with
the routines for new-style dissectors not having the "old_". Update the
dissectors that use those routines appropriately.
Rename "dissect_data()" to "old_dissect_data()", and
"dissect_data_tvb()" to "dissect_data()".
svn path=/trunk/; revision=2218
2000-08-07 03:21:25 +00:00
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old_dissector_add("udp.port", UDP_PORT_RIPNG, dissect_ripng);
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2000-04-08 07:07:42 +00:00
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}
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