packet-lpd.c

   1 /* packet-lpr.c
   2  * Routines for LPR and LPRng packet disassembly
   3  * Gilbert Ramirez <gram@verdict.uthscsa.edu>
   4  *
   5  * $Id: packet-lpd.c,v 1.3 1998/09/27 22:12:32 gerald Exp $
   6  *
   7  * Ethereal - Network traffic analyzer
   8  * By Gerald Combs <gerald@unicom.net>
   9  * Copyright 1998 Gerald Combs
  10  *
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  25  */
  26
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <gtk/gtk.h>
  32
  33 #include <stdio.h>
  34 #include <string.h>
  35
  36 #ifdef HAVE_SYS_TYPES_H
  37 # include <sys/types.h>
  38 #endif
  39
  40 #ifdef HAVE_NETINET_IN_H
  41 # include <netinet/in.h>
  42 #endif
  43
  44 #include <pcap.h>
  45
  46 #include "ethereal.h"
  47 #include "packet.h"
  48 #include "etypes.h"
  49
  50 enum lpr_type { request, response };
  51
  52 void
  53 dissect_lpd(const u_char *pd, int offset, frame_data *fd, GtkTree *tree)
  54 {
  55         GtkWidget       *lpd_tree, *ti;
  56         enum lpr_type   lpr_packet_type;
  57         char            *newline, *printer, *line_pos;
  58         int                     substr_len, curr_offset;
  59
  60         /* This information comes from the LPRng HOWTO, which also describes
  61                 RFC 1179. http://www.astart.com/lprng/LPRng-HOWTO.html */
  62         char            *lpd_client_code[] = {
  63                 "Unknown command",
  64                 "LPC: start print",
  65                 "LPR: transfer a printer job",
  66                 "LPQ: print short form of queue status",
  67                 "LPQ: print long form of queue status",
  68                 "LPRM: remove jobs",
  69                 "LPRng lpc: do control operation",
  70                 "LPRng lpr: transfer a block format print job",
  71                 "LPRng lpc: secure command transfer",
  72                 "LPRng lpq: verbose status information"
  73         };
  74         char            *lpd_server_code[] = {
  75                 "Success: accepted, proceed",
  76                 "Queue not accepting jobs",
  77                 "Queue temporarily full, retry later",
  78                 "Bad job format, do not retry"
  79         };
  80
  81
  82         if (pd[offset+1] == '\n') {
  83                 lpr_packet_type = response;
  84         }
  85         else if (pd[offset] <= 9) {
  86                 lpr_packet_type = request;
  87         }
  88         else {
  89                 lpr_packet_type = response;
  90         }
  91
  92
  93         if (fd->win_info[COL_NUM]) {
  94                 strcpy(fd->win_info[COL_PROTOCOL], "LPD");
  95                 if (lpr_packet_type == request) {
  96                         strcpy(fd->win_info[COL_INFO], lpd_client_code[pd[offset]]);
  97                 }
  98                 else {
  99                         strcpy(fd->win_info[COL_INFO], "LPD response");
 100                 }
 101         }
 102
 103         if (tree) {
 104                 ti = add_item_to_tree(GTK_WIDGET(tree), offset, fd->cap_len - offset,
 105                   "Line Printer Daemon Protocol");
 106                 lpd_tree = gtk_tree_new();
 107                 add_subtree(ti, lpd_tree, ETT_LPD);
 108
 109                 if (lpr_packet_type == request) {
 110                         if (pd[offset] <= 9) {
 111                                 add_item_to_tree(lpd_tree, offset,              1,
 112                                         lpd_client_code[pd[offset]]);
 113                         }
 114                         else {
 115                                 add_item_to_tree(lpd_tree, offset,              1,
 116                                         lpd_client_code[0]);
 117                         }
 118                         printer = strdup(&pd[offset+1]);
 119
 120                         /* get rid of the new-line so that the tree prints out nicely */
 121                         if (printer[fd->cap_len - offset - 2] == 0x0a) {
 122                                 printer[fd->cap_len - offset - 2] = 0;
 123                         }
 124                         add_item_to_tree(lpd_tree, offset+1, fd->cap_len - (offset+1),
 125                                         /*"Printer/options: %s", &pd[offset+1]);*/
 126                                         "Printer/options: %s", printer);
 127                         free(printer);
 128                 }
 129                 else {
 130                         if (pd[offset] <= 3) {
 131                                 add_item_to_tree(lpd_tree, offset, 2, "Response: %s",
 132                                         lpd_server_code[pd[offset]]);
 133                         }
 134                         else {
 135                                 printer = strdup(&pd[offset]);
 136                                 line_pos = printer;
 137                                 curr_offset = offset;
 138                                 while (fd->cap_len > curr_offset) {
 139                                         newline = strchr(line_pos, '\n');
 140                                         if (!newline) {
 141                                                 add_item_to_tree(lpd_tree, curr_offset,
 142                                                         fd->cap_len - offset, "Text: %s", line_pos);
 143                                                 break;
 144                                         }
 145                                         *newline = 0;
 146                                         substr_len = strlen(line_pos);
 147                                         add_item_to_tree(lpd_tree, curr_offset, substr_len + 1,
 148                                                 "Text: %s", line_pos);
 149                                         curr_offset += substr_len + 1;
 150                                         line_pos = newline + 1;
 151                                 }
 152                         }
 153                 }
 154         }
 155 }
 156