forked from osmocom/wireshark
ae4915d52a
svn path=/trunk/; revision=2597
267 lines
6.9 KiB
C
267 lines
6.9 KiB
C
/* packet-ftp.c
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* Routines for ftp packet dissection
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* Copyright 1999, Richard Sharpe <rsharpe@ns.aus.com>
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*
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* $Id: packet-ftp.c,v 1.21 2000/11/10 08:02:34 guy 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-pop.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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#include <stdlib.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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#include "strutil.h"
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static int proto_ftp = -1;
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static int proto_ftp_data = -1;
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static int hf_ftp_response = -1;
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static int hf_ftp_request = -1;
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static int hf_ftp_request_command = -1;
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static int hf_ftp_request_data = -1;
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static int hf_ftp_response_code = -1;
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static int hf_ftp_response_data = -1;
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static gint ett_ftp = -1;
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static gint ett_ftp_data = -1;
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#define TCP_PORT_FTPDATA 20
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#define TCP_PORT_FTP 21
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static void
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dissect_ftp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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gboolean is_request;
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proto_tree *ftp_tree;
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proto_item *ti;
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gint offset = 0;
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const u_char *line;
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gint next_offset;
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int linelen;
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int tokenlen;
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const u_char *next_token;
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CHECK_DISPLAY_AS_DATA(proto_ftp, tvb, pinfo, tree);
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if (pinfo->match_port == pinfo->destport)
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is_request = TRUE;
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else
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is_request = FALSE;
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pinfo->current_proto = "FTP";
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if (check_col(pinfo->fd, COL_PROTOCOL))
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col_add_str(pinfo->fd, COL_PROTOCOL, "FTP");
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/*
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* Find the end of the first line.
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*/
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linelen = tvb_find_line_end(tvb, offset, -1, &next_offset);
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line = tvb_get_ptr(tvb, offset, linelen);
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if (check_col(pinfo->fd, COL_INFO)) {
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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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col_add_fstr(pinfo->fd, COL_INFO, "%s: %s",
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is_request ? "Request" : "Response",
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format_text(line, linelen));
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}
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if (tree) {
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ti = proto_tree_add_item(tree, proto_ftp, tvb, offset,
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tvb_length_remaining(tvb, offset), FALSE);
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ftp_tree = proto_item_add_subtree(ti, ett_ftp);
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if (is_request) {
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proto_tree_add_boolean_hidden(ftp_tree,
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hf_ftp_request, tvb, 0, 0, TRUE);
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proto_tree_add_boolean_hidden(ftp_tree,
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hf_ftp_response, tvb, 0, 0, FALSE);
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} else {
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proto_tree_add_boolean_hidden(ftp_tree,
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hf_ftp_request, tvb, 0, 0, FALSE);
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proto_tree_add_boolean_hidden(ftp_tree,
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hf_ftp_response, tvb, 0, 0, TRUE);
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}
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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 code.
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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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if (is_request) {
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proto_tree_add_string_format(ftp_tree,
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hf_ftp_request_command, tvb, offset,
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tokenlen, line, "Request: %s",
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format_text(line, tokenlen));
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} else {
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proto_tree_add_uint_format(ftp_tree,
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hf_ftp_response_code, tvb, offset,
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tokenlen, atoi(line), "Response: %s",
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format_text(line, tokenlen));
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}
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offset += next_token - line;
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linelen -= next_token - line;
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line = next_token;
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}
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/*
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* Add the rest of the first line as request or
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* reply data.
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*/
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if (linelen != 0) {
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if (is_request) {
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proto_tree_add_string_format(ftp_tree,
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hf_ftp_request_data, tvb, offset,
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linelen, line, "Request Arg: %s",
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format_text(line, linelen));
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} else {
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proto_tree_add_string_format(ftp_tree,
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hf_ftp_response_data, tvb, offset,
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linelen, line, "Response Arg: %s",
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format_text(line, linelen));
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}
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}
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offset = next_offset;
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/*
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* Show the rest of the request or response as text,
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* a line at a time.
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*/
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while (tvb_length_remaining(tvb, offset)) {
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/*
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* Find the end of the line.
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*/
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linelen = tvb_find_line_end(tvb, offset, -1,
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&next_offset);
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/*
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* Put this line.
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*/
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proto_tree_add_text(ftp_tree, tvb, offset,
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next_offset - offset, "%s",
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tvb_format_text(tvb, offset, next_offset - offset));
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offset = next_offset;
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}
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}
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}
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static void
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dissect_ftpdata(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_tree *ti, *ftp_data_tree;
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int data_length;
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pinfo->current_proto = "FTP-DATA";
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if (check_col(pinfo->fd, COL_PROTOCOL))
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col_add_str(pinfo->fd, COL_PROTOCOL, "FTP-DATA");
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if (check_col(pinfo->fd, COL_INFO)) {
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col_add_fstr(pinfo->fd, COL_INFO, "FTP Data: %u bytes",
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tvb_length(tvb));
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}
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if (tree) {
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data_length = tvb_length(tvb);
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ti = proto_tree_add_item(tree, proto_ftp_data, tvb, 0,
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data_length, FALSE);
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ftp_data_tree = proto_item_add_subtree(ti, ett_ftp_data);
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/*
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* XXX - if this is binary data, it'll produce
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* a *really* long line.
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*/
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proto_tree_add_text(ftp_data_tree, tvb, 0, data_length,
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"FTP Data: %s", tvb_format_text(tvb, 0, data_length));
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}
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}
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void
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proto_register_ftp(void)
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{
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static hf_register_info hf[] = {
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{ &hf_ftp_response,
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{ "Response", "ftp.response",
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FT_BOOLEAN, BASE_NONE, NULL, 0x0,
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"TRUE if FTP response" }},
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{ &hf_ftp_request,
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{ "Request", "ftp.request",
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FT_BOOLEAN, BASE_NONE, NULL, 0x0,
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"TRUE if FTP request" }},
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{ &hf_ftp_request_command,
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{ "Request command", "ftp.request.command",
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FT_STRING, BASE_NONE, NULL, 0x0,
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"" }},
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{ &hf_ftp_request_data,
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{ "Request data", "ftp.request.data",
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FT_STRING, BASE_NONE, NULL, 0x0,
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"" }},
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{ &hf_ftp_response_code,
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{ "Response code", "ftp.response.code",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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"" }},
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{ &hf_ftp_response_data,
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{ "Response data", "ftp.reponse.data",
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FT_STRING, BASE_NONE, NULL, 0x0,
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"" }}
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};
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static gint *ett[] = {
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&ett_ftp,
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&ett_ftp_data,
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};
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proto_ftp = proto_register_protocol("File Transfer Protocol (FTP)", "ftp");
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proto_ftp_data = proto_register_protocol("FTP Data", "ftp-data");
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proto_register_field_array(proto_ftp, 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_ftp(void)
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{
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dissector_add("tcp.port", TCP_PORT_FTPDATA, &dissect_ftpdata);
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dissector_add("tcp.port", TCP_PORT_FTP, &dissect_ftp);
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}
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