update.c

   1 /* update.c
   2  *
   3  * $Id$
   4  *
   5  * Wireshark - Network traffic analyzer
   6  * By Gerald Combs <gerald@wireshark.org>
   7  * Copyright 1998 Gerald Combs
   8  *
   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 <glib.h>
  28 #include <string.h>
  29 #include <stdio.h>
  30
  31 #include <epan/prefs.h>
  32 #include <epan/prefs-int.h>
  33 #include <epan/filesystem.h>
  34
  35 #include "simple_dialog.h"
  36 #include "version_info.h"
  37
  38 #ifdef HAVE_LIBPCAP
  39 #include "capture-pcap-util.h"
  40 #endif
  41
  42 #include <wsutil/file_util.h>
  43
  44 #include <wininet.h>
  45 #include "nio-ie5.h"
  46
  47
  48 /* update information about a single component */
  49 typedef struct update_info_s {
  50     char *prefix;                   /* prefix of the update file keys */
  51     gboolean needs_update;          /* does this component need an update */
  52     char *version_installed;        /* the version currently installed */
  53
  54     char *title;                    /* the component title (name) */
  55     char *description;              /* description of the component */
  56     char *version_recommended;      /* the version recommended */
  57     char *url;                      /* the URL for an update */
  58     char *md5;                      /* md5 checksum for that update */
  59     char *size;                     /* size of that update */
  60 } update_info_t;
  61
  62
  63 /* download a complete file from the internet */
  64 int
  65 download_file(const char *url, const char *filename) {
  66     netio_ie5_t * conn;
  67     char buf[100];
  68     int chunk_len;
  69     int fd;
  70     int stream_len;
  71     int ret = 0;
  72
  73
  74     /* open output file */
  75     fd = ws_open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
  76     if(fd == -1) {
  77         g_warning("Couldn't open output file %s!", filename);
  78         return -1;
  79     }
  80
  81     /* connect to url */
  82     conn = netio_ie5_connect (url);
  83     if (conn == NULL) {
  84         ws_close(fd);
  85         g_warning("Couldn't connect to %s!", url);
  86         return -1;
  87     }
  88
  89     do {
  90                 /* XXX - maybe add a progress bar here */
  91
  92         /* read some bytes from the url */
  93         chunk_len = netio_ie5_read (conn, buf, sizeof(buf));
  94
  95         /* write bytes to the output file */
  96         stream_len = ws_write( fd, buf, chunk_len);
  97         if(stream_len != chunk_len) {
  98             g_warning("output failed: stream_len %u != chunk_len %u", stream_len, chunk_len);
  99             ret = -1;
 100             break;
 101         }
 102     } while(chunk_len > 0);
 103
 104     netio_ie5_disconnect(conn);
 105
 106     ws_close(fd);
 107
 108     return ret;
 109 }
 110
 111 update_info_t *
 112 update_info_new(void)
 113 {
 114     return g_malloc0(sizeof(update_info_t));
 115 }
 116
 117 void
 118 update_info_delete(update_info_t *update_info)
 119 {
 120     g_free(update_info->prefix);
 121     g_free(update_info->version_installed);
 122     g_free(update_info->title);
 123     g_free(update_info->description);
 124     g_free(update_info->version_recommended);
 125     g_free(update_info->url);
 126     g_free(update_info->md5);
 127     g_free(update_info->size);
 128
 129     g_free(update_info);
 130 }
 131
 132 /* check a single key value pair */
 133 static void
 134 update_pref_check(gchar *pref_name, gchar *value, char *check_prefix, char *check_name, char **check_value)
 135 {
 136     GString *check = g_string_new(check_prefix);
 137
 138     g_string_append(check, check_name);
 139
 140     if(strcmp(pref_name, check->str) == 0) {
 141         if(*check_value)
 142             /* there shouldn't be a duplicate entry in the update file */
 143             g_warning("Duplicate of %s: current %s former %s", pref_name, value, *check_value);
 144         else
 145             *check_value = g_strdup(value);
 146     }
 147
 148     g_string_free(check, TRUE);
 149 }
 150
 151 /* a new key value pair from the update file */
 152 static prefs_set_pref_e
 153 update_pref(gchar *pref_name, gchar *value, void *private_data)
 154 {
 155     update_info_t *update_info = private_data;
 156
 157     update_pref_check(pref_name, value, update_info->prefix, "title",       &update_info->title);
 158     update_pref_check(pref_name, value, update_info->prefix, "description", &update_info->description);
 159     update_pref_check(pref_name, value, update_info->prefix, "version",     &update_info->version_recommended);
 160     update_pref_check(pref_name, value, update_info->prefix, "update.url",  &update_info->url);
 161     update_pref_check(pref_name, value, update_info->prefix, "update.md5",  &update_info->md5);
 162     update_pref_check(pref_name, value, update_info->prefix, "update.size",  &update_info->size);
 163
 164     return PREFS_SET_OK;
 165 }
 166
 167 /* display an update_info */
 168 static void
 169 update_info_display(update_info_t *update_info)
 170 {
 171     GString *overview;
 172
 173
 174     overview = g_string_new("");
 175
 176     if(update_info->title) {
 177         g_string_append_printf(overview, "%s%s%s",
 178             simple_dialog_primary_start(), update_info->title, simple_dialog_primary_end());
 179     } else {
 180         g_string_append_printf(overview, "%sComponent%s",
 181             simple_dialog_primary_start(), simple_dialog_primary_end());
 182     }
 183
 184     g_string_append(overview, "\n\n");
 185
 186     if(update_info->description)
 187         g_string_append_printf(overview, "%s\n\n", update_info->description);
 188
 189     g_string_append_printf(overview, "Installed: %s\n", update_info->version_installed);
 190
 191     if(update_info->version_recommended)
 192         g_string_append_printf(overview, "Recommended: %s\n", update_info->version_recommended);
 193     else
 194         g_string_append(overview, "Recommenced: unknown\n");
 195
 196     if(update_info->version_recommended && update_info->url)
 197         g_string_append_printf(overview, "From: %s\n", update_info->url);
 198
 199     if(update_info->size)
 200         g_string_append_printf(overview, "Size: %s", update_info->size);
 201
 202     simple_dialog(ESD_TYPE_INFO, ESD_BTN_OK, overview->str);
 203
 204     g_string_free(overview, TRUE);
 205
 206 }
 207
 208 /* check the version of the wireshark program */
 209 static update_info_t *
 210 update_check_wireshark(const char *local_file)
 211 {
 212     FILE *pf;
 213     update_info_t *update_info = update_info_new();
 214
 215
 216     update_info->version_installed = g_strdup(VERSION);
 217     update_info->prefix = "wireshark.setup.";
 218
 219     pf = ws_fopen(local_file, "r");
 220     if(pf != NULL) {
 221         /* read in update_info of Wireshark */
 222         read_prefs_file(local_file, pf, update_pref, update_info);
 223         fclose(pf);
 224
 225         /* check if Wireshark needs an update */
 226         if(update_info->version_installed && update_info->version_recommended &&
 227             strcmp(update_info->version_installed, update_info->version_recommended) != 0)
 228         {
 229             update_info->needs_update = TRUE;
 230         }
 231     } else {
 232         g_warning("Could not open %s", local_file);
 233     }
 234
 235     return update_info;
 236 }
 237
 238 /* check the version of winpcap */
 239 static update_info_t *
 240 update_check_winpcap(const char *local_file)
 241 {
 242     FILE *pf;
 243     update_info_t * update_info = update_info_new();
 244     GString *pcap_version_tmp;
 245     char *pcap_version = NULL;
 246     char *pcap_vstart;
 247     char *pcap_vend;
 248
 249
 250     update_info->prefix = "winpcap.";
 251
 252     pf = ws_fopen(local_file, "r");
 253     if(pf != NULL) {
 254         /* read in update_info of WinPcap */
 255         read_prefs_file(local_file, pf, update_pref, update_info);
 256         fclose(pf);
 257
 258         /* get WinPcap version */
 259         /* XXX - what's the "approved" method to get the WinPcap version? */
 260         pcap_version_tmp = g_string_new("");
 261         get_runtime_pcap_version(pcap_version_tmp);
 262
 263         /* cut out real version from "combined" version string */
 264         pcap_vstart = strstr(pcap_version_tmp->str, "with WinPcap version ");
 265         if(pcap_vstart != NULL) {
 266             pcap_vstart += sizeof("with WinPcap version");
 267             pcap_vend = strstr(pcap_vstart, " ");
 268             if(pcap_vend != NULL) {
 269                 pcap_vend[0] = 0;
 270                 pcap_version = g_strdup(pcap_vstart);
 271             }
 272         }
 273
 274         update_info->version_installed = g_strdup(pcap_version);
 275
 276         if(pcap_version && update_info->version_recommended &&
 277             strcmp(pcap_version, update_info->version_recommended) != 0)
 278         {
 279             update_info->needs_update = TRUE;
 280         }
 281     } else {
 282         g_warning("Could not open %s", local_file);
 283     }
 284
 285     g_string_free(pcap_version_tmp, TRUE);
 286     g_free(pcap_version);
 287
 288     return update_info;
 289 }
 290
 291
 292 /* check for all updates */
 293 void
 294 update_check(gboolean interactive)
 295 {
 296     char *local_file;
 297     const char *url_file = "http://127.0.0.1/wsupdate"; /* XXX - build the URL depending on platform, versions, ... */
 298     update_info_t *update_info_wireshark;
 299     update_info_t *update_info_winpcap;
 300
 301
 302     /* build update file name */
 303     /* XXX - using the personal path, use temp dir instead? */
 304     local_file = get_persconffile_path("wsupdate", FALSE);
 305     if(local_file == NULL) {
 306         g_warning("Couldn't create output path!");
 307         return;
 308     }
 309
 310     /* download update file */
 311     if(download_file(url_file, local_file) == -1) {
 312         g_warning("Couldn't download update file: %s", local_file);
 313         g_free(local_file);
 314         return;
 315     }
 316
 317     /* check wireshark */
 318     update_info_wireshark = update_check_wireshark(local_file);
 319
 320     /* check winpcap */
 321     update_info_winpcap = update_check_winpcap(local_file);
 322
 323     /* display results */
 324     if(update_info_wireshark->needs_update || update_info_winpcap->needs_update) {
 325         if(update_info_wireshark->needs_update)
 326             update_info_display(update_info_wireshark);
 327         if(update_info_winpcap->needs_update)
 328             update_info_display(update_info_winpcap);
 329     } else {
 330         if(interactive) {
 331             simple_dialog(ESD_TYPE_INFO, ESD_BTN_OK, "No updates available");
 332         }
 333     }
 334
 335     /* cleanup */
 336     update_info_delete(update_info_wireshark);
 337     update_info_delete(update_info_winpcap);
 338
 339     g_free(local_file);
 340 }
 341