forked from osmocom/wireshark
cc36f0b931
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
173 lines
4.1 KiB
C
173 lines
4.1 KiB
C
/* packet-irc.c
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* Routines for MSX irc packet dissection
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*
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* $Id: packet-irc.c,v 1.8 2000/08/13 14:08:18 deniel Exp $
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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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* Copied from packet-tftp.c
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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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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.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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#include <string.h>
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#include <glib.h>
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#include "packet.h"
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static int proto_irc = -1;
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static int hf_irc_request = -1;
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static int hf_irc_response = -1;
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static int hf_irc_command = -1;
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static gint ett_irc = -1;
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#define TCP_PORT_IRC 6667
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/* good candidate for dynamic port specification */
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static void
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dissect_irc_request(proto_tree *tree, char *line, int offset, int len)
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{
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proto_tree_add_boolean_hidden(tree, hf_irc_request, NullTVB,
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offset, len, TRUE);
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proto_tree_add_text(tree, NullTVB, offset,
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len, "Request Line: %s", line);
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}
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static void
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dissect_irc_response(proto_tree *tree, char *line, int offset, int len)
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{
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proto_tree_add_boolean_hidden(tree, hf_irc_response, NullTVB,
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offset, len, TRUE);
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proto_tree_add_text(tree, NullTVB, offset,
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len, "Response Line: %s", line);
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}
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static void
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dissect_irc(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
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{
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proto_tree *irc_tree, *ti;
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char *tmpline;
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int start, cur, len;
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const u_char *i;
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OLD_CHECK_DISPLAY_AS_DATA(proto_irc, pd, offset, fd, tree);
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if (check_col(fd, COL_PROTOCOL))
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col_add_str(fd, COL_PROTOCOL, "IRC");
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if (check_col(fd, COL_INFO))
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{
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col_add_fstr(fd, COL_INFO, "%s",
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(pi.match_port == pi.destport) ? "Request" : "Response");
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}
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if (tree)
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{
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ti = proto_tree_add_item(tree, proto_irc, NullTVB, offset, END_OF_FRAME, FALSE);
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irc_tree = proto_item_add_subtree(ti, ett_irc);
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tmpline = (char *)g_malloc( pi.captured_len );
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i = pd+offset;
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while ( i < pd + pi.captured_len )
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{
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start = i - pd;
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cur = 0;
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len = 0;
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tmpline[cur] = 0;
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/* copy up to end or cr/nl */
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while ( i < pd + pi.captured_len && *i != '\r' && *i != '\n' )
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{
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tmpline[cur++] = *(i++);
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len++;
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}
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tmpline[cur] = 0;
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/* skip any CR/NL */
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while ( i < pd + pi.captured_len &&
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(*i == '\r' || *i == '\n') )
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{
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i++;
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len++;
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}
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if ( strlen(tmpline) > 0 )
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{
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if (pi.match_port == pi.destport)
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{
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dissect_irc_request(irc_tree, tmpline, start, len);
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}
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else
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{
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dissect_irc_response(irc_tree, tmpline, start, len);
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}
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}
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}
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g_free(tmpline);
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tmpline = 0;
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}
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}
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void
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proto_register_irc(void)
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{
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static hf_register_info hf[] = {
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{ &hf_irc_response,
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{ "Response", "irc.response",
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FT_BOOLEAN, BASE_NONE, NULL, 0x0,
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"TRUE if IRC response" }},
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{ &hf_irc_request,
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{ "Request", "irc.request",
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FT_BOOLEAN, BASE_NONE, NULL, 0x0,
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"TRUE if IRC request" }},
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{ &hf_irc_command,
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{ "Command", "irc.command",
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FT_STRING, BASE_NONE, NULL, 0x0,
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"Command associated with request" }}
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};
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static gint *ett[] = {
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&ett_irc,
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};
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proto_irc = proto_register_protocol("Internet Relay Chat", "irc");
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proto_register_field_array(proto_irc, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void
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proto_reg_handoff_irc(void)
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{
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old_dissector_add("tcp.port", TCP_PORT_IRC, dissect_irc);
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}
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