epan/dissectors/packet-gift.c

   1 /* packet-gift.c
   2  * Routines for giFT Internet File Transfer dissection
   3  * Copyright 2000, Jon Oberheide <jon@oberheide.org>
   4  *
   5  * See http://www.giftproject.org/
   6  *
   7  * $Id$
   8  *
   9  * Wireshark - Network traffic analyzer
  10  * By Gerald Combs <gerald@wireshark.org>
  11  * Copyright 1998 Gerald Combs
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * as published by the Free Software Foundation; either version 2
  16  * of the License, or (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  26  */
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include <glib.h>
  36 #include <epan/packet.h>
  37 #include <epan/strutil.h>
  38
  39 #define TCP_PORT_GIFT 1213
  40
  41 static int proto_gift = -1;
  42 static int hf_gift_response = -1;
  43 static int hf_gift_request = -1;
  44
  45 static gint ett_gift = -1;
  46 static gint ett_gift_cmd = -1;
  47
  48 static void
  49 dissect_gift(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
  50 {
  51         proto_item      *ti, *hidden_item;
  52         proto_tree      *gift_tree, *cmd_tree;
  53         gboolean        is_request;
  54         gint            offset = 0;
  55         const guchar    *line;
  56         gint            next_offset;
  57         int             linelen;
  58         int             tokenlen;
  59         const guchar    *next_token;
  60
  61         /* set "Protocol" column text */
  62         if (check_col(pinfo->cinfo, COL_PROTOCOL))
  63                 col_set_str(pinfo->cinfo, COL_PROTOCOL, "giFT");
  64
  65         /* determine whether it is a request to or response from the server */
  66         if (pinfo->match_port == pinfo->destport)
  67                 is_request = TRUE;
  68         else
  69                 is_request = FALSE;
  70
  71         linelen = tvb_find_line_end(tvb, offset, -1, &next_offset, FALSE);
  72         line = tvb_get_ptr(tvb, offset, linelen);
  73
  74         /* clear the "Info" column */
  75         if (check_col(pinfo->cinfo, COL_INFO))
  76                 col_clear(pinfo->cinfo, COL_INFO);
  77
  78         /* set "Info" column text */
  79         if (check_col(pinfo->cinfo, COL_INFO))
  80                 col_add_fstr(pinfo->cinfo, COL_INFO, "%s: %s",
  81                              is_request ? "Request" : "Response",
  82                              format_text(line, linelen));
  83
  84         /* if tree != NULL, build protocol tree */
  85         if (tree) {
  86                 ti = proto_tree_add_item(tree, proto_gift, tvb, 0, -1, FALSE);
  87                 gift_tree = proto_item_add_subtree(ti, ett_gift);
  88
  89                 if (is_request) {
  90                         hidden_item = proto_tree_add_boolean(gift_tree, hf_gift_request, tvb, 0, 0, TRUE);
  91                 } else {
  92                         hidden_item = proto_tree_add_boolean(gift_tree, hf_gift_response, tvb, 0, 0, TRUE);
  93                 }
  94                 PROTO_ITEM_SET_HIDDEN(hidden_item);
  95
  96                 ti = proto_tree_add_text(gift_tree, tvb, offset, next_offset - offset, "%s",
  97                                          tvb_format_text(tvb, offset, next_offset - offset));
  98                 cmd_tree = proto_item_add_subtree(ti, ett_gift_cmd);
  99
 100                 tokenlen = get_token_len(line, line + linelen, &next_token);
 101                 if (tokenlen != 0) {
 102                         if (is_request) {
 103                                 proto_tree_add_text(cmd_tree, tvb, offset,
 104                                                     tokenlen, "Request Command: %s",
 105                                                     format_text(line, tokenlen));
 106                         } else {
 107                                 proto_tree_add_text(cmd_tree, tvb, offset,
 108                                                     tokenlen, "Response Command: %s",
 109                                                     format_text(line, tokenlen));
 110                         }
 111                         offset += (gint) (next_token - line);
 112                         linelen -= (int) (next_token - line);
 113                         line = next_token;
 114                 }
 115
 116                 if (linelen != 0) {
 117                         if (is_request) {
 118                                 proto_tree_add_text(cmd_tree, tvb, offset,
 119                                                     linelen, "Request Arg: %s",
 120                                                     format_text(line, linelen));
 121                         } else {
 122                                 proto_tree_add_text(cmd_tree, tvb, offset,
 123                                                     linelen, "Response Arg: %s",
 124                                                     format_text(line, linelen));
 125                         }
 126                 }
 127         }
 128 }
 129
 130 void
 131 proto_register_gift(void)
 132 {
 133         static hf_register_info hf[] = {
 134                 { &hf_gift_response,
 135                         { "Response", "gift.response", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "TRUE if giFT response", HFILL }
 136                 },
 137                 { &hf_gift_request,
 138                         { "Request", "gift.request", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "TRUE if giFT request", HFILL }
 139                 }
 140         };
 141
 142         static gint *ett[] = {
 143                 &ett_gift,
 144                 &ett_gift_cmd,
 145         };
 146
 147         proto_gift = proto_register_protocol("giFT Internet File Transfer",
 148                                              "giFT", "gift");
 149
 150         proto_register_field_array(proto_gift, hf, array_length(hf));
 151         proto_register_subtree_array(ett, array_length(ett));
 152 }
 153
 154 void
 155 proto_reg_handoff_gift(void)
 156 {
 157         dissector_handle_t gift_handle;
 158
 159         gift_handle = create_dissector_handle(dissect_gift, proto_gift);
 160         dissector_add("tcp.port", TCP_PORT_GIFT, gift_handle);
 161 }