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/* packet-gift.c
 * Routines for giFT Internet File Transfer dissection
 * Copyright 2000, Jon Oberheide <jon@oberheide.org>
 *
 * See http://www.giftproject.org/
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "config.h"

#include <epan/packet.h>
#include <epan/strutil.h>

void proto_register_gift(void);
void proto_reg_handoff_gift(void);

#define TCP_PORT_GIFT 1213

static int proto_gift = -1;
static int hf_gift_response = -1;
static int hf_gift_request = -1;
static int hf_gift_response_cmd = -1;
static int hf_gift_response_arg = -1;
static int hf_gift_request_cmd = -1;
static int hf_gift_request_arg = -1;

static gint ett_gift = -1;
static gint ett_gift_cmd = -1;

static int
dissect_gift(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
        proto_item      *ti, *hidden_item;
        proto_tree      *gift_tree, *cmd_tree;
        gboolean        is_request;
        gint            offset = 0;
        const guchar    *line;
        gint            next_offset;
        int             linelen;
        int             tokenlen;
        const guchar    *next_token;

        /* set "Protocol" column text */
        col_set_str(pinfo->cinfo, COL_PROTOCOL, "giFT");

        /* determine whether it is a request to or response from the server */
        if (pinfo->match_uint == pinfo->destport)
                is_request = TRUE;
        else
                is_request = FALSE;

        linelen = tvb_find_line_end(tvb, offset, -1, &next_offset, FALSE);
        line = tvb_get_ptr(tvb, offset, linelen);

        /* set "Info" column text */
        col_add_fstr(pinfo->cinfo, COL_INFO, "%s: %s",
                             is_request ? "Request" : "Response",
                             format_text(line, linelen));

        /* if tree != NULL, build protocol tree */
        if (tree) {
                ti = proto_tree_add_item(tree, proto_gift, tvb, 0, -1, ENC_NA);
                gift_tree = proto_item_add_subtree(ti, ett_gift);

                if (is_request) {
                        hidden_item = proto_tree_add_boolean(gift_tree, hf_gift_request, tvb, 0, 0, TRUE);
                } else {
                        hidden_item = proto_tree_add_boolean(gift_tree, hf_gift_response, tvb, 0, 0, TRUE);
                }
                PROTO_ITEM_SET_HIDDEN(hidden_item);

                ti = proto_tree_add_format_text(gift_tree, tvb, offset, next_offset - offset);
                cmd_tree = proto_item_add_subtree(ti, ett_gift_cmd);

                tokenlen = get_token_len(line, line + linelen, &next_token);
                if (tokenlen != 0) {
                        if (is_request) {
                                proto_tree_add_string(cmd_tree, hf_gift_request_cmd, tvb, offset,
                                                    tokenlen, format_text(line, tokenlen));
                        } else {
                                proto_tree_add_string(cmd_tree, hf_gift_response_cmd, tvb, offset,
                                                    tokenlen, format_text(line, tokenlen));
                        }
                        offset += (gint) (next_token - line);
                        linelen -= (int) (next_token - line);
                        line = next_token;
                }

                if (linelen != 0) {
                        if (is_request) {
                                proto_tree_add_string(cmd_tree, hf_gift_request_arg, tvb, offset,
                                                    linelen, format_text(line, linelen));
                        } else {
                                proto_tree_add_string(cmd_tree, hf_gift_response_arg, tvb, offset,
                                                    linelen, format_text(line, linelen));
                        }
                }
        }
        return tvb_captured_length(tvb);
}

void
proto_register_gift(void)
{
        static hf_register_info hf[] = {
                { &hf_gift_response,
                        { "Response", "gift.response", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "TRUE if giFT response", HFILL }
                },
                { &hf_gift_request,
                        { "Request", "gift.request", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "TRUE if giFT request", HFILL }
                },
                { &hf_gift_response_cmd,
                        { "Response Command", "gift.response_cmd", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }
                },
                { &hf_gift_response_arg,
                        { "Response Arg", "gift.response_arg", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }
                },
                { &hf_gift_request_cmd,
                        { "Request Command", "gift.request_cmd", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }
                },
                { &hf_gift_request_arg,
                        { "Request Arg", "gift.request_arg", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }
                },
        };

        static gint *ett[] = {
                &ett_gift,
                &ett_gift_cmd,
        };

        proto_gift = proto_register_protocol("giFT Internet File Transfer",
                                             "giFT", "gift");

        proto_register_field_array(proto_gift, hf, array_length(hf));
        proto_register_subtree_array(ett, array_length(ett));
}

void
proto_reg_handoff_gift(void)
{
        dissector_handle_t gift_handle;

        gift_handle = create_dissector_handle(dissect_gift, proto_gift);
        dissector_add_uint("tcp.port", TCP_PORT_GIFT, gift_handle);
}

/*
 * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 *
 * Local variables:
 * c-basic-offset: 8
 * tab-width: 8
 * indent-tabs-mode: t
 * End:
 *
 * vi: set shiftwidth=8 tabstop=8 noexpandtab:
 * :indentSize=8:tabSize=8:noTabs=false:
 */