![Guy Harris](/assets/img/avatar_default.png)
dynamically-assigned "ett_" integer values, assigned by "proto_register_subtree_array()"; this: obviates the need to update "packet.h" whenever you add a new subtree type - you only have to add a call to "proto_register_subtree_array()" to a "register" routine and an array of pointers to "ett_", if they're not already there, and add a pointer to the new "ett_" variable to the array, if they are there; would allow run-time-loaded dissectors to allocate subtree types when they're loaded. svn path=/trunk/; revision=1043
184 lines
4.8 KiB
C
184 lines
4.8 KiB
C
/* packet-lpd.c
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* Routines for LPR and LPRng packet disassembly
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* Gilbert Ramirez <gram@verdict.uthscsa.edu>
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*
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* $Id: packet-lpd.c,v 1.13 1999/11/16 11:42:38 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@unicom.net>
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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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#include <string.h>
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#include <glib.h>
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#include "packet.h"
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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 };
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void
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dissect_lpd(const u_char *pd, int offset, frame_data *fd, 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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char *newline, *printer, *line_pos;
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int substr_len, curr_offset;
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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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"LPC: start print",
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"LPR: transfer a printer job",
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"LPQ: print short form of queue status",
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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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if (pd[offset+1] == '\n') {
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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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lpr_packet_type = response;
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}
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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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if (lpr_packet_type == request) {
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col_add_str(fd, COL_INFO, lpd_client_code[pd[offset]]);
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}
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else {
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col_add_str(fd, COL_INFO, "LPD response");
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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, offset,
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END_OF_FRAME, NULL);
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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_item_hidden(lpd_tree, hf_lpd_response,
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0, 0, TRUE);
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} else {
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proto_tree_add_item_hidden(lpd_tree, hf_lpd_request,
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0, 0, TRUE);
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}
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if (lpr_packet_type == request) {
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if (pd[offset] <= 9) {
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proto_tree_add_text(lpd_tree, offset, 1,
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lpd_client_code[pd[offset]]);
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}
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else {
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proto_tree_add_text(lpd_tree, offset, 1,
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lpd_client_code[0]);
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}
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printer = g_strdup(&pd[offset+1]);
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/* get rid of the new-line so that the tree prints out nicely */
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if (printer[END_OF_FRAME - 2] == 0x0a) {
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printer[END_OF_FRAME - 2] = 0;
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}
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proto_tree_add_text(lpd_tree, offset+1,
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END_OF_FRAME - 1,
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/*"Printer/options: %s", &pd[offset+1]);*/
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"Printer/options: %s", printer);
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g_free(printer);
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}
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else {
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if (pd[offset] <= 3) {
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proto_tree_add_text(lpd_tree, offset, 2, "Response: %s",
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lpd_server_code[pd[offset]]);
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}
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else {
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printer = strdup(&pd[offset]);
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line_pos = printer;
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curr_offset = offset;
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while (IS_DATA_IN_FRAME(curr_offset)) {
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newline = strchr(line_pos, '\n');
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if (!newline) {
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proto_tree_add_text(lpd_tree, curr_offset,
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END_OF_FRAME, "Text: %s", line_pos);
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break;
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}
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*newline = 0;
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substr_len = strlen(line_pos);
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proto_tree_add_text(lpd_tree, curr_offset, substr_len + 1,
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"Text: %s", line_pos);
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curr_offset += substr_len + 1;
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line_pos = newline + 1;
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}
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}
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}
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}
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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" }},
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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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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");
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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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