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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  26  */
  27
  28 #include "config.h"
  29
  30 #include <glib.h>
  31
  32 #include <epan/packet.h>
  33 #include <epan/strutil.h>
  34
  35 #define TCP_PORT_GIFT 1213
  36
  37 static int proto_gift = -1;
  38 static int hf_gift_response = -1;
  39 static int hf_gift_request = -1;
  40
  41 static gint ett_gift = -1;
  42 static gint ett_gift_cmd = -1;
  43
  44 static void
  45 dissect_gift(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
  46 {
  47         proto_item      *ti, *hidden_item;
  48         proto_tree      *gift_tree, *cmd_tree;
  49         gboolean        is_request;
  50         gint            offset = 0;
  51         const guchar    *line;
  52         gint            next_offset;
  53         int             linelen;
  54         int             tokenlen;
  55         const guchar    *next_token;
  56
  57         /* set "Protocol" column text */
  58         col_set_str(pinfo->cinfo, COL_PROTOCOL, "giFT");
  59
  60         /* determine whether it is a request to or response from the server */
  61         if (pinfo->match_uint == pinfo->destport)
  62                 is_request = TRUE;
  63         else
  64                 is_request = FALSE;
  65
  66         linelen = tvb_find_line_end(tvb, offset, -1, &next_offset, FALSE);
  67         line = tvb_get_ptr(tvb, offset, linelen);
  68
  69         /* set "Info" column text */
  70         col_add_fstr(pinfo->cinfo, COL_INFO, "%s: %s",
  71                              is_request ? "Request" : "Response",
  72                              format_text(line, linelen));
  73
  74         /* if tree != NULL, build protocol tree */
  75         if (tree) {
  76                 ti = proto_tree_add_item(tree, proto_gift, tvb, 0, -1, ENC_NA);
  77                 gift_tree = proto_item_add_subtree(ti, ett_gift);
  78
  79                 if (is_request) {
  80                         hidden_item = proto_tree_add_boolean(gift_tree, hf_gift_request, tvb, 0, 0, TRUE);
  81                 } else {
  82                         hidden_item = proto_tree_add_boolean(gift_tree, hf_gift_response, tvb, 0, 0, TRUE);
  83                 }
  84                 PROTO_ITEM_SET_HIDDEN(hidden_item);
  85
  86                 ti = proto_tree_add_text(gift_tree, tvb, offset, next_offset - offset, "%s",
  87                                          tvb_format_text(tvb, offset, next_offset - offset));
  88                 cmd_tree = proto_item_add_subtree(ti, ett_gift_cmd);
  89
  90                 tokenlen = get_token_len(line, line + linelen, &next_token);
  91                 if (tokenlen != 0) {
  92                         if (is_request) {
  93                                 proto_tree_add_text(cmd_tree, tvb, offset,
  94                                                     tokenlen, "Request Command: %s",
  95                                                     format_text(line, tokenlen));
  96                         } else {
  97                                 proto_tree_add_text(cmd_tree, tvb, offset,
  98                                                     tokenlen, "Response Command: %s",
  99                                                     format_text(line, tokenlen));
 100                         }
 101                         offset += (gint) (next_token - line);
 102                         linelen -= (int) (next_token - line);
 103                         line = next_token;
 104                 }
 105
 106                 if (linelen != 0) {
 107                         if (is_request) {
 108                                 proto_tree_add_text(cmd_tree, tvb, offset,
 109                                                     linelen, "Request Arg: %s",
 110                                                     format_text(line, linelen));
 111                         } else {
 112                                 proto_tree_add_text(cmd_tree, tvb, offset,
 113                                                     linelen, "Response Arg: %s",
 114                                                     format_text(line, linelen));
 115                         }
 116                 }
 117         }
 118 }
 119
 120 void
 121 proto_register_gift(void)
 122 {
 123         static hf_register_info hf[] = {
 124                 { &hf_gift_response,
 125                         { "Response", "gift.response", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "TRUE if giFT response", HFILL }
 126                 },
 127                 { &hf_gift_request,
 128                         { "Request", "gift.request", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "TRUE if giFT request", HFILL }
 129                 }
 130         };
 131
 132         static gint *ett[] = {
 133                 &ett_gift,
 134                 &ett_gift_cmd,
 135         };
 136
 137         proto_gift = proto_register_protocol("giFT Internet File Transfer",
 138                                              "giFT", "gift");
 139
 140         proto_register_field_array(proto_gift, hf, array_length(hf));
 141         proto_register_subtree_array(ett, array_length(ett));
 142 }
 143
 144 void
 145 proto_reg_handoff_gift(void)
 146 {
 147         dissector_handle_t gift_handle;
 148
 149         gift_handle = create_dissector_handle(dissect_gift, proto_gift);
 150         dissector_add_uint("tcp.port", TCP_PORT_GIFT, gift_handle);
 151 }