dftest.c

   1 /* dftest.c
   2  * Shows display filter byte-code, for debugging dfilter routines.
   3  *
   4  * $Id$
   5  *
   6  * Wireshark - Network traffic analyzer
   7  * By Gerald Combs <gerald@wireshark.org>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version 2
  13  * of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  23  */
  24
  25 #include "config.h"
  26
  27 #include <stdlib.h>
  28 #include <stdio.h>
  29 #include <locale.h>
  30 #include <string.h>
  31 #include <errno.h>
  32
  33 #include <glib.h>
  34 #include <epan/epan.h>
  35
  36 #include <epan/timestamp.h>
  37 #include <epan/plugins.h>
  38 #include <epan/filesystem.h>
  39 #include <wsutil/privileges.h>
  40 #include <epan/prefs.h>
  41 #include "ui/util.h"
  42 #include "epan/dfilter/dfilter.h"
  43 #include "register.h"
  44
  45 static void failure_message(const char *msg_format, va_list ap);
  46 static void open_failure_message(const char *filename, int err,
  47         gboolean for_writing);
  48 static void read_failure_message(const char *filename, int err);
  49 static void write_failure_message(const char *filename, int err);
  50
  51 int
  52 main(int argc, char **argv)
  53 {
  54         char            *init_progfile_dir_error;
  55         char            *text;
  56         char            *gpf_path, *pf_path;
  57         int             gpf_open_errno, gpf_read_errno;
  58         int             pf_open_errno, pf_read_errno;
  59         dfilter_t       *df;
  60
  61         /*
  62          * Get credential information for later use.
  63          */
  64         init_process_policies();
  65
  66         /*
  67          * Attempt to get the pathname of the executable file.
  68          */
  69         init_progfile_dir_error = init_progfile_dir(argv[0], main);
  70         if (init_progfile_dir_error != NULL) {
  71                 fprintf(stderr, "dftest: Can't get pathname of dftest program: %s.\n",
  72                         init_progfile_dir_error);
  73         }
  74
  75         timestamp_set_type(TS_RELATIVE);
  76         timestamp_set_seconds_type(TS_SECONDS_DEFAULT);
  77
  78         /* Register all dissectors; we must do this before checking for the
  79            "-g" flag, as the "-g" flag dumps a list of fields registered
  80            by the dissectors, and we must do it before we read the preferences,
  81            in case any dissectors register preferences. */
  82         epan_init(register_all_protocols,
  83                   register_all_protocol_handoffs, NULL, NULL,
  84                   failure_message, open_failure_message, read_failure_message,
  85                   write_failure_message);
  86
  87         /* set the c-language locale to the native environment. */
  88         setlocale(LC_ALL, "");
  89
  90         read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
  91                 &pf_open_errno, &pf_read_errno, &pf_path);
  92         if (gpf_path != NULL) {
  93                 if (gpf_open_errno != 0) {
  94                         fprintf(stderr,
  95                                 "can't open global preferences file \"%s\": %s.\n",
  96                                 pf_path, g_strerror(gpf_open_errno));
  97                 }
  98                 if (gpf_read_errno != 0) {
  99                         fprintf(stderr,
 100                                 "I/O error reading global preferences file \"%s\": %s.\n",
 101                                 pf_path, g_strerror(gpf_read_errno));
 102                 }
 103         }
 104         if (pf_path != NULL) {
 105                 if (pf_open_errno != 0) {
 106                         fprintf(stderr,
 107                                 "can't open your preferences file \"%s\": %s.\n",
 108                                 pf_path, g_strerror(pf_open_errno));
 109                 }
 110                 if (pf_read_errno != 0) {
 111                         fprintf(stderr,
 112                                 "I/O error reading your preferences file \"%s\": %s.\n",
 113                                 pf_path, g_strerror(pf_read_errno));
 114                 }
 115         }
 116
 117         /* notify all registered modules that have had any of their preferences
 118         changed either from one of the preferences file or from the command
 119         line that its preferences have changed. */
 120         prefs_apply_all();
 121
 122         /* Check for filter on command line */
 123         if (argc <= 1) {
 124                 fprintf(stderr, "Usage: dftest <filter>\n");
 125                 exit(1);
 126         }
 127
 128         /* Get filter text */
 129         text = get_args_as_string(argc, argv, 1);
 130
 131         printf("Filter: \"%s\"\n", text);
 132
 133         /* Compile it */
 134         if (!dfilter_compile(text, &df)) {
 135                 fprintf(stderr, "dftest: %s\n", dfilter_error_msg);
 136                 epan_cleanup();
 137                 exit(2);
 138         }
 139
 140         printf("\n");
 141
 142         if (df == NULL)
 143                 printf("Filter is empty\n");
 144         else
 145                 dfilter_dump(df);
 146
 147         dfilter_free(df);
 148         epan_cleanup();
 149         exit(0);
 150 }
 151
 152 /*
 153  * General errors are reported with an console message in "dftest".
 154  */
 155 static void
 156 failure_message(const char *msg_format, va_list ap)
 157 {
 158         fprintf(stderr, "dftest: ");
 159         vfprintf(stderr, msg_format, ap);
 160         fprintf(stderr, "\n");
 161 }
 162
 163 /*
 164  * Open/create errors are reported with an console message in "dftest".
 165  */
 166 static void
 167 open_failure_message(const char *filename, int err, gboolean for_writing)
 168 {
 169         fprintf(stderr, "dftest: ");
 170         fprintf(stderr, file_open_error_message(err, for_writing), filename);
 171         fprintf(stderr, "\n");
 172 }
 173
 174 /*
 175  * Read errors are reported with an console message in "dftest".
 176  */
 177 static void
 178 read_failure_message(const char *filename, int err)
 179 {
 180         fprintf(stderr, "dftest: An error occurred while reading from the file \"%s\": %s.\n",
 181                 filename, g_strerror(err));
 182 }
 183
 184 /*
 185  * Write errors are reported with an console message in "dftest".
 186  */
 187 static void
 188 write_failure_message(const char *filename, int err)
 189 {
 190         fprintf(stderr, "dftest: An error occurred while writing to the file \"%s\": %s.\n",
 191                 filename, g_strerror(err));
 192 }