1999-10-17 11:40:14 +00:00
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/* packet-lpd.c
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1998-09-16 02:39:15 +00:00
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* Routines for LPR and LPRng packet disassembly
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2000-01-22 06:22:44 +00:00
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* Gilbert Ramirez <gram@xiexie.org>
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1998-09-16 02:39:15 +00:00
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*
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2000-05-11 08:18:09 +00:00
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* $Id: packet-lpd.c,v 1.19 2000/05/11 08:15:23 gram Exp $
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1998-09-16 03:22:19 +00:00
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*
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1998-09-16 02:39:15 +00:00
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* Ethereal - Network traffic analyzer
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2000-01-07 22:05:43 +00:00
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* By Gerald Combs <gerald@zing.org>
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1998-09-16 02:39:15 +00:00
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* Copyright 1998 Gerald Combs
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*
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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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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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1999-03-23 03:14:46 +00:00
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#include <string.h>
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1998-09-16 02:39:15 +00:00
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1999-03-23 03:14:46 +00:00
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#include <glib.h>
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1998-09-27 22:12:47 +00:00
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#include "packet.h"
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1998-09-16 02:39:15 +00:00
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2000-04-08 07:07:42 +00:00
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#define TCP_PORT_PRINTER 515
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1999-10-17 11:40:14 +00:00
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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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1999-11-16 11:44:20 +00:00
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static gint ett_lpd = -1;
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1999-12-15 23:47:30 +00:00
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enum lpr_type { request, response, unknown };
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static char* find_printer_string(const u_char *pd, int offset, int frame_length);
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1998-09-16 02:39:15 +00:00
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2000-04-08 07:07:42 +00:00
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static void
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1999-03-23 03:14:46 +00:00
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dissect_lpd(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
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1998-09-16 02:39:15 +00:00
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{
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1999-03-23 03:14:46 +00:00
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proto_tree *lpd_tree;
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proto_item *ti;
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1998-09-16 02:39:15 +00:00
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enum lpr_type lpr_packet_type;
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1999-12-15 23:47:30 +00:00
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char *printer;
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1998-09-16 02:39:15 +00:00
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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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char *lpd_client_code[] = {
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"Unknown command",
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2000-04-20 15:24:41 +00:00
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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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1998-09-16 02:39:15 +00:00
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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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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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2000-04-20 15:24:41 +00:00
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/* rfc1179 states that all responses are 1 byte long */
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if (END_OF_FRAME == 1) {
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1998-09-16 02:39:15 +00:00
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lpr_packet_type = response;
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}
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else if (pd[offset] <= 9) {
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lpr_packet_type = request;
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}
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else {
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1999-12-15 23:47:30 +00:00
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lpr_packet_type = unknown;
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1998-09-16 02:39:15 +00:00
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}
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1998-11-17 04:29:13 +00:00
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if (check_col(fd, COL_PROTOCOL))
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col_add_str(fd, COL_PROTOCOL, "LPD");
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if (check_col(fd, COL_INFO)) {
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1998-09-16 02:39:15 +00:00
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if (lpr_packet_type == request) {
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1998-11-17 04:29:13 +00:00
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col_add_str(fd, COL_INFO, lpd_client_code[pd[offset]]);
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1998-09-16 02:39:15 +00:00
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}
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1999-12-15 23:47:30 +00:00
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else if (lpr_packet_type == response) {
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1998-11-17 04:29:13 +00:00
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col_add_str(fd, COL_INFO, "LPD response");
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1998-09-16 02:39:15 +00:00
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}
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1999-12-15 23:47:30 +00:00
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else {
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col_add_str(fd, COL_INFO, "LPD continuation");
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}
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1998-09-16 02:39:15 +00:00
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}
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if (tree) {
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2000-05-11 08:18:09 +00:00
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ti = proto_tree_add_item(tree, proto_lpd, NullTVB, offset,
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1999-10-17 11:40:14 +00:00
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END_OF_FRAME, NULL);
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1999-11-16 11:44:20 +00:00
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lpd_tree = proto_item_add_subtree(ti, ett_lpd);
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1998-09-16 02:39:15 +00:00
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1999-10-17 11:40:14 +00:00
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if (lpr_packet_type == response) {
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2000-05-11 08:18:09 +00:00
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proto_tree_add_item_hidden(lpd_tree, hf_lpd_response, NullTVB, 0, 0, TRUE);
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1999-10-17 11:40:14 +00:00
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} else {
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2000-05-11 08:18:09 +00:00
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proto_tree_add_item_hidden(lpd_tree, hf_lpd_request, NullTVB, 0, 0, TRUE);
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1999-10-17 11:40:14 +00:00
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}
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1998-09-16 02:39:15 +00:00
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if (lpr_packet_type == request) {
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1999-12-15 23:47:30 +00:00
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printer = find_printer_string(pd, offset+1, END_OF_FRAME);
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if (pd[offset] <= 9 && printer) {
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2000-05-11 08:18:09 +00:00
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proto_tree_add_text(lpd_tree, NullTVB, offset, 1,
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1998-09-16 02:39:15 +00:00
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lpd_client_code[pd[offset]]);
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2000-05-11 08:18:09 +00:00
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proto_tree_add_text(lpd_tree, NullTVB, offset+1,
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1999-12-15 23:47:30 +00:00
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strlen(printer), "Printer/options: %s", printer);
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1998-09-16 02:39:15 +00:00
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}
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else {
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1999-12-15 23:47:30 +00:00
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dissect_data(pd, offset, fd, tree);
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1998-09-16 02:39:15 +00:00
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}
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1999-12-15 23:47:30 +00:00
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if (printer)
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g_free(printer);
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1998-09-16 02:39:15 +00:00
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}
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1999-12-15 23:47:30 +00:00
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else if (lpr_packet_type == response) {
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int response = pd[offset];
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if (response <= 3) {
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2000-05-11 08:18:09 +00:00
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proto_tree_add_text(lpd_tree, NullTVB, offset, 1, "Response: %s",
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1999-12-15 23:47:30 +00:00
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lpd_server_code[response]);
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1998-09-16 02:39:15 +00:00
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}
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else {
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1999-12-15 23:47:30 +00:00
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dissect_data(pd, offset, fd, tree);
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1998-09-16 02:39:15 +00:00
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}
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}
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1999-12-15 23:47:30 +00:00
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else {
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dissect_data(pd, offset, fd, tree);
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}
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}
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}
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static char*
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find_printer_string(const u_char *pd, int offset, int frame_length)
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{
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int i, final_offset;
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char c;
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char *string;
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int bytes;
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final_offset = offset + frame_length;
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/* try to find end of string, either 0x0a or 0x00 */
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for (i = offset; i < final_offset; i++) {
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c = pd[i];
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if (c == '\x00' || c == '\x0a') {
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bytes = i - offset;
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string = g_malloc(bytes+1);
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memcpy(string, &pd[offset], bytes);
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string[bytes] = 0;
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return string;
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}
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1998-09-16 02:39:15 +00:00
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}
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1999-12-15 23:47:30 +00:00
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return NULL;
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1998-09-16 02:39:15 +00:00
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}
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1999-12-15 23:47:30 +00:00
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1999-10-17 11:40:14 +00:00
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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" }},
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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" }}
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};
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1999-11-16 11:44:20 +00:00
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static gint *ett[] = {
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&ett_lpd,
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};
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1999-10-17 11:40:14 +00:00
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proto_lpd = proto_register_protocol("Line Printer Daemon Protocol", "lpd");
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proto_register_field_array(proto_lpd, hf, array_length(hf));
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1999-11-16 11:44:20 +00:00
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proto_register_subtree_array(ett, array_length(ett));
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1999-10-17 11:40:14 +00:00
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}
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1999-12-15 23:47:30 +00:00
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2000-04-08 07:07:42 +00:00
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void
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proto_reg_handoff_lpd(void)
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{
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dissector_add("tcp.port", TCP_PORT_PRINTER, &dissect_lpd);
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}
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