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/* packet-lpd.c
* Routines for LPR and LPRng packet disassembly
* Gilbert Ramirez <gram@verdict.uthscsa.edu>
*
* $Id: packet-lpd.c,v 1.13 1999/11/16 11:42:38 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@unicom.net>
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#include <string.h>
#include <glib.h>
#include "packet.h"
static int proto_lpd = -1;
static int hf_lpd_response = -1;
static int hf_lpd_request = -1;
static gint ett_lpd = -1;
enum lpr_type { request, response };
void
dissect_lpd(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
{
proto_tree *lpd_tree;
proto_item *ti;
enum lpr_type lpr_packet_type;
char *newline, *printer, *line_pos;
int substr_len, curr_offset;
/* This information comes from the LPRng HOWTO, which also describes
RFC 1179. http://www.astart.com/lprng/LPRng-HOWTO.html */
char *lpd_client_code[] = {
"Unknown command",
"LPC: start print",
"LPR: transfer a printer job",
"LPQ: print short form of queue status",
"LPQ: print long form of queue status",
"LPRM: remove jobs",
"LPRng lpc: do control operation",
"LPRng lpr: transfer a block format print job",
"LPRng lpc: secure command transfer",
"LPRng lpq: verbose status information"
};
char *lpd_server_code[] = {
"Success: accepted, proceed",
"Queue not accepting jobs",
"Queue temporarily full, retry later",
"Bad job format, do not retry"
};
if (pd[offset+1] == '\n') {
lpr_packet_type = response;
}
else if (pd[offset] <= 9) {
lpr_packet_type = request;
}
else {
lpr_packet_type = response;
}
if (check_col(fd, COL_PROTOCOL))
col_add_str(fd, COL_PROTOCOL, "LPD");
if (check_col(fd, COL_INFO)) {
if (lpr_packet_type == request) {
col_add_str(fd, COL_INFO, lpd_client_code[pd[offset]]);
}
else {
col_add_str(fd, COL_INFO, "LPD response");
}
}
if (tree) {
ti = proto_tree_add_item(tree, proto_lpd, offset,
END_OF_FRAME, NULL);
lpd_tree = proto_item_add_subtree(ti, ett_lpd);
if (lpr_packet_type == response) {
proto_tree_add_item_hidden(lpd_tree, hf_lpd_response,
0, 0, TRUE);
} else {
proto_tree_add_item_hidden(lpd_tree, hf_lpd_request,
0, 0, TRUE);
}
if (lpr_packet_type == request) {
if (pd[offset] <= 9) {
proto_tree_add_text(lpd_tree, offset, 1,
lpd_client_code[pd[offset]]);
}
else {
proto_tree_add_text(lpd_tree, offset, 1,
lpd_client_code[0]);
}
printer = g_strdup(&pd[offset+1]);
/* get rid of the new-line so that the tree prints out nicely */
if (printer[END_OF_FRAME - 2] == 0x0a) {
printer[END_OF_FRAME - 2] = 0;
}
proto_tree_add_text(lpd_tree, offset+1,
END_OF_FRAME - 1,
/*"Printer/options: %s", &pd[offset+1]);*/
"Printer/options: %s", printer);
g_free(printer);
}
else {
if (pd[offset] <= 3) {
proto_tree_add_text(lpd_tree, offset, 2, "Response: %s",
lpd_server_code[pd[offset]]);
}
else {
printer = strdup(&pd[offset]);
line_pos = printer;
curr_offset = offset;
while (IS_DATA_IN_FRAME(curr_offset)) {
newline = strchr(line_pos, '\n');
if (!newline) {
proto_tree_add_text(lpd_tree, curr_offset,
END_OF_FRAME, "Text: %s", line_pos);
break;
}
*newline = 0;
substr_len = strlen(line_pos);
proto_tree_add_text(lpd_tree, curr_offset, substr_len + 1,
"Text: %s", line_pos);
curr_offset += substr_len + 1;
line_pos = newline + 1;
}
}
}
}
}
void
proto_register_lpd(void)
{
static hf_register_info hf[] = {
{ &hf_lpd_response,
{ "Response", "lpd.response",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
"TRUE if LPD response" }},
{ &hf_lpd_request,
{ "Request", "lpd.request",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
"TRUE if LPD request" }}
};
static gint *ett[] = {
&ett_lpd,
};
proto_lpd = proto_register_protocol("Line Printer Daemon Protocol", "lpd");
proto_register_field_array(proto_lpd, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
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