![Gilbert Ramirez](/assets/img/avatar_default.png)
Also move ncp222.py, x11-fields, process-x11-fields.pl, make-reg-dotc, and make-reg-dotc.py. Adjust #include lines in files that include packet-*.h files. svn path=/trunk/; revision=11410
197 lines
5.2 KiB
C
197 lines
5.2 KiB
C
/* packet-lpd.c
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* Routines for LPR and LPRng packet disassembly
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* Gilbert Ramirez <gram@alumni.rice.edu>
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*
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* $Id$
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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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 <string.h>
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#include <glib.h>
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#include <epan/packet.h>
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#define TCP_PORT_PRINTER 515
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static int proto_lpd = -1;
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static int hf_lpd_response = -1;
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static int hf_lpd_request = -1;
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static gint ett_lpd = -1;
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enum lpr_type { request, response, unknown };
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static gint find_printer_string(tvbuff_t *tvb, int offset);
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static dissector_handle_t data_handle;
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static void
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dissect_lpd(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_tree *lpd_tree;
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proto_item *ti;
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enum lpr_type lpr_packet_type;
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guint8 code;
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gint printer_len;
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/* This information comes from the LPRng HOWTO, which also describes
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RFC 1179. http://www.astart.com/lprng/LPRng-HOWTO.html */
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static char *lpd_client_code[] = {
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"Unknown command",
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"LPC: start print / jobcmd: abort",
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"LPR: transfer a printer job / jobcmd: receive control file",
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"LPQ: print short form of queue status / jobcmd: receive data file",
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"LPQ: print long form of queue status",
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"LPRM: remove jobs",
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"LPRng lpc: do control operation",
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"LPRng lpr: transfer a block format print job",
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"LPRng lpc: secure command transfer",
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"LPRng lpq: verbose status information"
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};
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static char *lpd_server_code[] = {
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"Success: accepted, proceed",
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"Queue not accepting jobs",
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"Queue temporarily full, retry later",
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"Bad job format, do not retry"
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};
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "LPD");
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if (check_col(pinfo->cinfo, COL_INFO))
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col_clear(pinfo->cinfo, COL_INFO);
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/* rfc1179 states that all responses are 1 byte long */
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code = tvb_get_guint8(tvb, 0);
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if (tvb_reported_length(tvb) == 1) {
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lpr_packet_type = response;
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}
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else if (code <= 9) {
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lpr_packet_type = request;
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}
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else {
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lpr_packet_type = unknown;
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}
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if (check_col(pinfo->cinfo, COL_INFO)) {
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if (lpr_packet_type == request) {
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col_set_str(pinfo->cinfo, COL_INFO, lpd_client_code[code]);
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}
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else if (lpr_packet_type == response) {
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col_set_str(pinfo->cinfo, COL_INFO, "LPD response");
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}
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else {
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col_set_str(pinfo->cinfo, COL_INFO, "LPD continuation");
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}
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}
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if (tree) {
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ti = proto_tree_add_item(tree, proto_lpd, tvb, 0, -1, FALSE);
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lpd_tree = proto_item_add_subtree(ti, ett_lpd);
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if (lpr_packet_type == response) {
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proto_tree_add_boolean_hidden(lpd_tree, hf_lpd_response,
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tvb, 0, 0, TRUE);
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} else {
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proto_tree_add_boolean_hidden(lpd_tree, hf_lpd_request,
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tvb, 0, 0, TRUE);
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}
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if (lpr_packet_type == request) {
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printer_len = find_printer_string(tvb, 1);
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if (code <= 9 && printer_len != -1) {
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proto_tree_add_text(lpd_tree, tvb, 0, 1,
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lpd_client_code[code]);
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proto_tree_add_text(lpd_tree, tvb, 1, printer_len,
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"Printer/options: %s",
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tvb_format_text(tvb, 1, printer_len));
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}
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else {
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call_dissector(data_handle,tvb, pinfo, tree);
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}
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}
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else if (lpr_packet_type == response) {
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if (code <= 3) {
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proto_tree_add_text(lpd_tree, tvb, 0, 1,
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"Response: %s", lpd_server_code[code]);
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}
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else {
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call_dissector(data_handle,tvb, pinfo, tree);
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}
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}
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else {
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call_dissector(data_handle,tvb, pinfo, tree);
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}
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}
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}
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static gint
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find_printer_string(tvbuff_t *tvb, int offset)
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{
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int i;
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/* try to find end of string, either '\n' or '\0' */
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i = tvb_find_guint8(tvb, offset, -1, '\0');
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if (i == -1)
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i = tvb_find_guint8(tvb, offset, -1, '\n');
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if (i == -1)
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return -1;
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return i - offset; /* length of string */
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}
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void
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proto_register_lpd(void)
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{
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static hf_register_info hf[] = {
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{ &hf_lpd_response,
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{ "Response", "lpd.response",
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FT_BOOLEAN, BASE_NONE, NULL, 0x0,
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"TRUE if LPD response", HFILL }},
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{ &hf_lpd_request,
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{ "Request", "lpd.request",
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FT_BOOLEAN, BASE_NONE, NULL, 0x0,
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"TRUE if LPD request", HFILL }}
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};
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static gint *ett[] = {
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&ett_lpd,
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};
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proto_lpd = proto_register_protocol("Line Printer Daemon Protocol", "LPD", "lpd");
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proto_register_field_array(proto_lpd, 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_lpd(void)
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{
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dissector_handle_t lpd_handle;
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lpd_handle = create_dissector_handle(dissect_lpd, proto_lpd);
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dissector_add("tcp.port", TCP_PORT_PRINTER, lpd_handle);
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data_handle = find_dissector("data");
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}
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