1999-11-10 14:44:58 +00:00
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/* packet-imap.c
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* Routines for imap packet dissection
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* Copyright 1999, Richard Sharpe <rsharpe@ns.aus.com>
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*
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2004-07-18 00:24:25 +00:00
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* $Id$
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1999-11-10 14:44:58 +00:00
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*
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2006-05-21 04:49:01 +00:00
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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1999-11-10 14:44:58 +00:00
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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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2002-08-28 21:04:11 +00:00
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*
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1999-11-10 14:44:58 +00:00
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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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2002-08-28 21:04:11 +00:00
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*
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1999-11-10 14:44:58 +00:00
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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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2002-08-28 21:04:11 +00:00
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*
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1999-11-10 14:44:58 +00:00
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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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2012-06-28 22:56:06 +00:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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1999-11-10 14:44:58 +00:00
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*/
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2012-09-20 02:03:38 +00:00
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#include "config.h"
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1999-11-10 14:44:58 +00:00
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2002-01-21 07:37:49 +00:00
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#include <epan/packet.h>
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#include <epan/strutil.h>
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2008-07-12 14:42:14 +00:00
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#include "packet-ssl.h"
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1999-11-10 14:44:58 +00:00
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2012-07-10 19:43:55 +00:00
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#include <stdio.h>
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#include <ctype.h>
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1999-11-10 14:44:58 +00:00
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static int proto_imap = -1;
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2011-10-25 01:28:00 +00:00
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static int hf_imap_isrequest = -1;
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static int hf_imap_line = -1;
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1999-11-14 10:48:17 +00:00
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static int hf_imap_request = -1;
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2011-10-25 01:28:00 +00:00
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static int hf_imap_request_tag = -1;
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static int hf_imap_response = -1;
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static int hf_imap_response_tag = -1;
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2012-07-10 19:43:55 +00:00
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static int hf_imap_request_command = -1;
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static int hf_imap_response_status = -1;
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static int hf_imap_request_folder = -1;
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static int hf_imap_request_uid = -1;
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1999-11-10 14:44:58 +00:00
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1999-11-16 11:44:20 +00:00
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static gint ett_imap = -1;
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2003-06-11 20:03:39 +00:00
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static gint ett_imap_reqresp = -1;
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1999-11-16 11:44:20 +00:00
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2000-04-08 07:07:42 +00:00
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#define TCP_PORT_IMAP 143
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2008-07-12 14:42:14 +00:00
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#define TCP_PORT_SSL_IMAP 993
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2012-07-10 19:43:55 +00:00
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#define MAX_BUFFER 1024
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2000-04-08 07:07:42 +00:00
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static void
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2000-12-29 02:19:14 +00:00
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dissect_imap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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1999-11-10 14:44:58 +00:00
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{
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2011-10-25 01:28:00 +00:00
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gboolean is_request;
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proto_tree *imap_tree, *reqresp_tree;
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proto_item *ti, *hidden_item;
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2000-12-29 02:19:14 +00:00
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gint offset = 0;
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2012-07-10 19:43:55 +00:00
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gint uid_offset = 0;
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gint folder_offset = 0;
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2002-08-02 23:36:07 +00:00
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const guchar *line;
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2012-07-10 19:43:55 +00:00
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const guchar *uid_line;
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const guchar *folder_line;
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2000-12-29 02:19:14 +00:00
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gint next_offset;
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int linelen;
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int tokenlen;
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2012-07-10 19:43:55 +00:00
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int uid_tokenlen;
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int folder_tokenlen;
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2002-08-02 23:36:07 +00:00
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const guchar *next_token;
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2012-07-10 19:43:55 +00:00
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const guchar *uid_next_token;
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const guchar *folder_next_token;
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guchar *tokenbuf;
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guchar *command_token;
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int iter;
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int commandlen;
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2000-12-29 02:19:14 +00:00
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2013-03-19 20:00:52 +00:00
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tokenbuf = (guchar *)ep_alloc(MAX_BUFFER);
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command_token = (guchar *)ep_alloc(MAX_BUFFER);
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2012-07-10 19:43:55 +00:00
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memset(tokenbuf, '\0', MAX_BUFFER);
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memset(command_token, '\0', MAX_BUFFER);
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commandlen = 0;
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folder_offset = 0;
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folder_tokenlen = 0;
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folder_line = NULL;
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2009-08-09 06:26:46 +00:00
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "IMAP");
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2000-12-29 02:19:14 +00:00
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2010-12-20 05:35:29 +00:00
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if (pinfo->match_uint == pinfo->destport)
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2000-12-29 02:19:14 +00:00
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is_request = TRUE;
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else
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is_request = FALSE;
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2013-06-14 01:02:11 +00:00
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/*
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* Put the first line from the buffer into the summary
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* (but leave out the line terminator).
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*/
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linelen = tvb_find_line_end(tvb, offset, -1, &next_offset, FALSE);
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line = tvb_get_ptr(tvb, offset, linelen);
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col_add_fstr(pinfo->cinfo, COL_INFO, "%s: %s",
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2006-10-26 07:45:01 +00:00
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is_request ? "Request" : "Response",
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format_text(line, linelen));
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1999-11-10 14:44:58 +00:00
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if (tree) {
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2011-10-25 01:28:00 +00:00
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ti = proto_tree_add_item(tree, proto_imap, tvb, offset, -1, ENC_NA);
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2000-12-29 02:19:14 +00:00
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imap_tree = proto_item_add_subtree(ti, ett_imap);
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2011-10-25 01:28:00 +00:00
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hidden_item = proto_tree_add_boolean(imap_tree, hf_imap_isrequest, tvb, 0, 0, is_request);
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2008-05-14 01:47:41 +00:00
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PROTO_ITEM_SET_HIDDEN(hidden_item);
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2000-12-29 02:19:14 +00:00
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2006-10-26 07:45:01 +00:00
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while(tvb_length_remaining(tvb, offset) > 2) {
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/*
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* Find the end of each line
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*
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* Note that "tvb_find_line_end()" will return a value that is
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* not longer than what's in the buffer, so the "tvb_get_ptr()"
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* call won't throw an exception.
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*/
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linelen = tvb_find_line_end(tvb, offset, -1, &next_offset, FALSE);
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line = tvb_get_ptr(tvb, offset, linelen);
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/*
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* Put the line into the protocol tree.
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*/
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2011-10-25 01:28:00 +00:00
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ti = proto_tree_add_item(imap_tree, hf_imap_line, tvb, offset,
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2012-07-10 19:43:55 +00:00
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next_offset - offset, ENC_ASCII|ENC_NA);
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2011-10-25 01:28:00 +00:00
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2006-10-26 07:45:01 +00:00
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reqresp_tree = proto_item_add_subtree(ti, ett_imap_reqresp);
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/*
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2012-07-10 19:43:55 +00:00
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* Check that the line doesn't begin with '*', because that's a continuation line.
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* Otherwise if a tag is present then extract tokens.
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2006-10-26 07:45:01 +00:00
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*/
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2012-07-10 19:43:55 +00:00
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if ( (line) && ((line[0] != '*') || (TRUE == is_request)) ) {
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/*
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* Show each line as tags + requests or replies.
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*/
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2006-10-26 07:45:01 +00:00
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2012-07-10 19:43:55 +00:00
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/*
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* Extract the first token, and, if there is a first
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* token, add it as the request or reply tag.
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*/
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tokenlen = get_token_len(line, line + linelen, &next_token);
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if (tokenlen != 0) {
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proto_tree_add_item(reqresp_tree, (is_request) ? hf_imap_request_tag : hf_imap_response_tag,
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tvb, offset, tokenlen, ENC_ASCII|ENC_NA);
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offset += (gint) (next_token - line);
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linelen -= (int) (next_token - line);
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line = next_token;
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}
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/*
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* Extract second token, and, if there is a second
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* token, and it's not uid, add it as the request or reply command.
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*/
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tokenlen = get_token_len(line, line + linelen, &next_token);
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if (tokenlen != 0) {
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for (iter = 0; iter < tokenlen && iter < MAX_BUFFER-1; iter++) {
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tokenbuf[iter] = tolower(line[iter]);
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}
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if ( TRUE == is_request && strncmp(tokenbuf,"uid",tokenlen) == 0) {
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proto_tree_add_item(reqresp_tree, hf_imap_request_uid, tvb, offset, tokenlen, ENC_ASCII|ENC_NA);
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/*
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* UID is a precursor to a command, if following the tag,
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* so move to next token to grab the actual command.
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*/
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uid_offset = offset;
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uid_offset += (gint) (next_token - line);
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uid_line = next_token;
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uid_tokenlen = get_token_len(uid_line, uid_line + (linelen - tokenlen), &uid_next_token);
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if (tokenlen != 0) {
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proto_tree_add_item(reqresp_tree, hf_imap_request_command,
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tvb, uid_offset, uid_tokenlen, ENC_ASCII|ENC_NA);
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/*
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* Save command string to do specialized processing.
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*/
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for (iter = 0; iter < uid_tokenlen && iter < MAX_BUFFER-1; iter++) {
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command_token[iter] = tolower(uid_line[iter]);
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}
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commandlen = uid_tokenlen;
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folder_offset = uid_offset;
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folder_offset += (gint) (uid_next_token - uid_line);
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folder_line = uid_next_token;
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folder_tokenlen = get_token_len(folder_line, folder_line + (linelen - tokenlen - uid_tokenlen), &folder_next_token);
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}
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} else {
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/*
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* Not a UID request so perform normal parsing.
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*/
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proto_tree_add_item(reqresp_tree, (is_request) ? hf_imap_request_command : hf_imap_response_status,
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tvb, offset, tokenlen, ENC_ASCII|ENC_NA);
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if (is_request) {
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/*
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* Save command string to do specialized processing.
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*/
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for (iter = 0; iter < tokenlen && iter < 256; iter++) {
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command_token[iter] = tolower(line[iter]);
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}
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commandlen = tokenlen;
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folder_offset = offset;
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folder_offset += (gint) (next_token - line);
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folder_line = next_token;
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folder_tokenlen = get_token_len(folder_line, folder_line + (linelen - tokenlen), &folder_next_token);
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}
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}
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if (commandlen > 0 && (
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strncmp(command_token, "select", commandlen) == 0 ||
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strncmp(command_token, "examine", commandlen) == 0 ||
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strncmp(command_token, "create", commandlen) == 0 ||
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strncmp(command_token, "delete", commandlen) == 0 ||
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strncmp(command_token, "rename", commandlen) == 0 ||
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strncmp(command_token, "subscribe", commandlen) == 0 ||
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strncmp(command_token, "unsubscribe", commandlen) == 0 ||
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strncmp(command_token, "status", commandlen) == 0 ||
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strncmp(command_token, "append", commandlen) == 0 ||
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strncmp(command_token, "search", commandlen) == 0)) {
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/*
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* These commands support folder as an argument,
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* so parse out the folder name.
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*/
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if (folder_tokenlen != 0)
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proto_tree_add_item(reqresp_tree, hf_imap_request_folder, tvb, folder_offset, folder_tokenlen, ENC_ASCII|ENC_NA);
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}
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if ( is_request && (NULL != folder_line) &&
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strncmp(command_token, "copy", commandlen) == 0) {
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/*
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* Handle the copy command separately since folder
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* is the second argument for this command.
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*/
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folder_offset += (gint) (folder_next_token - folder_line);
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folder_line = folder_next_token;
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folder_tokenlen = get_token_len(folder_line, folder_line + (linelen - tokenlen), &folder_next_token);
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if (folder_tokenlen != 0)
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proto_tree_add_item(reqresp_tree, hf_imap_request_folder, tvb, folder_offset, folder_tokenlen, ENC_ASCII|ENC_NA);
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}
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}
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/*
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* Add the rest of the line as request or reply data.
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*/
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if (linelen != 0) {
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proto_tree_add_item(reqresp_tree, (is_request) ? hf_imap_request : hf_imap_response,
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tvb, offset, linelen, ENC_ASCII|ENC_NA);
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}
|
2000-12-29 02:19:14 +00:00
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}
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|
2013-06-03 17:55:20 +00:00
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offset = next_offset; /* Skip over last line and \r\n at the end of it */
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2006-10-26 07:45:01 +00:00
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}
|
1999-11-10 14:44:58 +00:00
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}
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}
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void
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proto_register_imap(void)
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{
|
2011-10-25 01:28:00 +00:00
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static hf_register_info hf[] = {
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{ &hf_imap_isrequest, { "Request", "imap.isrequest", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "TRUE if IMAP request, FALSE otherwise", HFILL }},
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{ &hf_imap_line, { "Line", "imap.line", FT_STRINGZ, BASE_NONE, NULL, 0x0, "A line of an IMAP message", HFILL }},
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{ &hf_imap_request, { "Request", "imap.request", FT_STRINGZ, BASE_NONE, NULL, 0x0, "Remainder of request line", HFILL }},
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{ &hf_imap_request_tag, { "Request Tag", "imap.request_tag", FT_STRINGZ, BASE_NONE, NULL, 0x0, "First token of request line", HFILL }},
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{ &hf_imap_response, { "Response", "imap.response", FT_STRINGZ, BASE_NONE, NULL, 0x0, "Remainder of response line", HFILL }},
|
2012-07-10 19:43:55 +00:00
|
|
|
{ &hf_imap_response_tag, { "Response Tag", "imap.response_tag", FT_STRINGZ, BASE_NONE, NULL, 0x0, "First token of response line", HFILL }},
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{ &hf_imap_request_command, { "Request Command", "imap.request.command", FT_STRINGZ, BASE_NONE, NULL, 0x0, "Request command name", HFILL }},
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{ &hf_imap_response_status, { "Response Status", "imap.response.status", FT_STRINGZ, BASE_NONE, NULL, 0x0, "Response status code", HFILL }},
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{ &hf_imap_request_folder, { "Request Folder", "imap.request.folder", FT_STRINGZ, BASE_NONE, NULL, 0x0, "Request command folder", HFILL }},
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|
{ &hf_imap_request_uid, { "Request isUID", "imap.request.command.uid", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "Request command uid", HFILL }}
|
2011-10-25 01:28:00 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
static gint *ett[] = {
|
|
|
|
&ett_imap,
|
|
|
|
&ett_imap_reqresp,
|
|
|
|
};
|
|
|
|
|
|
|
|
proto_imap = proto_register_protocol("Internet Message Access Protocol",
|
|
|
|
"IMAP", "imap");
|
|
|
|
register_dissector("imap", dissect_imap, proto_imap);
|
|
|
|
proto_register_field_array(proto_imap, hf, array_length(hf));
|
|
|
|
proto_register_subtree_array(ett, array_length(ett));
|
1999-11-10 14:44:58 +00:00
|
|
|
}
|
2000-04-08 07:07:42 +00:00
|
|
|
|
|
|
|
void
|
|
|
|
proto_reg_handoff_imap(void)
|
|
|
|
{
|
2011-10-25 01:28:00 +00:00
|
|
|
dissector_handle_t imap_handle;
|
2001-12-03 04:00:26 +00:00
|
|
|
|
2011-10-25 01:28:00 +00:00
|
|
|
imap_handle = create_dissector_handle(dissect_imap, proto_imap);
|
|
|
|
dissector_add_uint("tcp.port", TCP_PORT_IMAP, imap_handle);
|
|
|
|
ssl_dissector_add(TCP_PORT_SSL_IMAP, "imap", TRUE);
|
2000-04-08 07:07:42 +00:00
|
|
|
}
|