ui/iface_lists.c

   1 /* iface_lists.c
   2  * Code to manage the global list of interfaces and to update widgets/windows
   3  * displaying items from those lists
   4  *
   5  * $Id$
   6  *
   7  * Wireshark - Network traffic analyzer
   8  * By Gerald Combs <gerald@wireshark.org>
   9  * Copyright 1998 Gerald Combs
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  24  */
  25
  26 #include "config.h"
  27
  28 #ifdef HAVE_LIBPCAP
  29
  30 #include <string.h>
  31
  32 #include <glib.h>
  33
  34 #include <epan/prefs.h>
  35 #include <epan/to_str.h>
  36
  37 #include "../capture_ui_utils.h"
  38
  39 #include "ui/capture_globals.h"
  40 #include "ui/iface_lists.h"
  41
  42 capture_options global_capture_opts;
  43
  44 /*
  45  * Used when sorting an interface list into alphabetical order by
  46  * their friendly names.
  47  */
  48 gint
  49 if_list_comparator_alph(const void *first_arg, const void *second_arg)
  50 {
  51     const if_info_t *first = (const if_info_t *)first_arg, *second = (const if_info_t *)second_arg;
  52
  53     if (first != NULL && first->friendly_name != NULL &&
  54         second != NULL && second->friendly_name != NULL) {
  55         return g_ascii_strcasecmp(first->friendly_name, second->friendly_name);
  56     } else {
  57         return 0;
  58     }
  59 }
  60
  61 /*
  62  * Fetch the list of local interfaces with capture_interface_list()
  63  * and set the list of "all interfaces" in *capture_opts to include
  64  * those interfaces.
  65  */
  66 void
  67 scan_local_interfaces(void)
  68 {
  69     GList             *if_entry, *lt_entry, *if_list;
  70     if_info_t         *if_info, *temp;
  71     char              *if_string;
  72     gchar             *descr;
  73     if_capabilities_t *caps=NULL;
  74     gint              linktype_count;
  75     gboolean          monitor_mode;
  76     GSList            *curr_addr;
  77     int               ips = 0, i, err;
  78     guint             count = 0, j;
  79     if_addr_t         *addr, *temp_addr;
  80     link_row          *link = NULL;
  81     data_link_info_t  *data_link_info;
  82     interface_t       device;
  83     GString           *ip_str;
  84     interface_options interface_opts;
  85     gboolean          found = FALSE;
  86
  87
  88     if (global_capture_opts.all_ifaces->len > 0) {
  89         for (i = (int)global_capture_opts.all_ifaces->len-1; i >= 0; i--) {
  90             device = g_array_index(global_capture_opts.all_ifaces, interface_t, i);
  91             if (device.local && device.type != IF_PIPE && device.type != IF_STDIN) {
  92                 global_capture_opts.all_ifaces = g_array_remove_index(global_capture_opts.all_ifaces, i);
  93             }
  94         }
  95     }
  96
  97     /* Scan through the list and build a list of strings to display. */
  98     if_list = capture_interface_list(&err, NULL);
  99     count = 0;
 100     for (if_entry = if_list; if_entry != NULL; if_entry = g_list_next(if_entry)) {
 101         if_info = (if_info_t *)if_entry->data;
 102         ip_str = g_string_new("");
 103         ips = 0;
 104         if (strstr(if_info->name, "rpcap:")) {
 105             continue;
 106         }
 107         device.name = g_strdup(if_info->name);
 108         if (if_info->friendly_name != NULL) {
 109             device.friendly_name = g_strdup(if_info->friendly_name);
 110         } else {
 111             device.friendly_name = NULL;
 112         }
 113         device.hidden = FALSE;
 114         device.locked = FALSE;
 115         temp = (if_info_t *)g_malloc0(sizeof(if_info_t));
 116         temp->name = g_strdup(if_info->name);
 117         temp->friendly_name = g_strdup(if_info->friendly_name);
 118         temp->vendor_description = g_strdup(if_info->vendor_description);
 119         temp->loopback = if_info->loopback;
 120         /* Is this interface hidden and, if so, should we include it anyway? */
 121
 122         /* Do we have a user-supplied description? */
 123         descr = capture_dev_user_descr_find(if_info->name);
 124         if (descr != NULL) {
 125             /* Yes, we have a user-supplied description; use it. */
 126             if_string = g_strdup_printf("%s: %s", descr, if_info->name);
 127             g_free(descr);
 128         } else {
 129             /* No, we don't have a user-supplied description; did we get
 130             one from the OS or libpcap? */
 131             if (if_info->friendly_name != NULL) {
 132                 /* We have a friendly name from the OS, use it */
 133 #ifdef _WIN32
 134                 /*
 135                  * On Windows, if we have a friendly name, just show it,
 136                  * don't show the name, as that's a string made out of
 137                  * the device GUID, and not at all friendly.
 138                  */
 139                 if_string = g_strdup_printf("%s", if_info->friendly_name);
 140 #else
 141                 /*
 142                  * On UN*X, if we have a friendly name, show it along
 143                  * with the interface name; the interface name is short
 144                  * and somewhat friendly, and many UN*X users are used
 145                  * to interface names, so we should show it.
 146                  */
 147                 if_string = g_strdup_printf("%s: %s", if_info->friendly_name, if_info->name);
 148 #endif
 149             } else if (if_info->vendor_description != NULL) {
 150                 /* We have a device description from libpcap - use it. */
 151                 if_string = g_strdup_printf("%s: %s", if_info->vendor_description, if_info->name);
 152             } else {
 153                 /* No. */
 154                 if_string = g_strdup(if_info->name);
 155             }
 156         }
 157         device.display_name = if_string;
 158         device.selected = FALSE;
 159         if (prefs_is_capture_device_hidden(if_info->name)) {
 160             device.hidden = TRUE;
 161         }
 162         device.type = if_info->type;
 163         monitor_mode = prefs_capture_device_monitor_mode(if_info->name);
 164         caps = capture_get_if_capabilities(if_info->name, monitor_mode, NULL);
 165         for (; (curr_addr = g_slist_nth(if_info->addrs, ips)) != NULL; ips++) {
 166             temp_addr = (if_addr_t *)g_malloc0(sizeof(if_addr_t));
 167             if (ips != 0) {
 168                 g_string_append(ip_str, "\n");
 169             }
 170             addr = (if_addr_t *)curr_addr->data;
 171             if (addr) {
 172                 temp_addr->ifat_type = addr->ifat_type;
 173                 switch (addr->ifat_type) {
 174                     case IF_AT_IPv4:
 175                         temp_addr->addr.ip4_addr = addr->addr.ip4_addr;
 176                         g_string_append(ip_str, ip_to_str((guint8 *)&addr->addr.ip4_addr));
 177                         break;
 178                     case IF_AT_IPv6:
 179                         memcpy(temp_addr->addr.ip6_addr, addr->addr.ip6_addr, sizeof(addr->addr));
 180                         g_string_append(ip_str,  ip6_to_str((struct e_in6_addr *)&addr->addr.ip6_addr));
 181                         break;
 182                     default:
 183                         /* In case we add non-IP addresses */
 184                         break;
 185                 }
 186             } else {
 187                 g_free(temp_addr);
 188                 temp_addr = NULL;
 189             }
 190             if (temp_addr) {
 191                 temp->addrs = g_slist_append(temp->addrs, temp_addr);
 192             }
 193         }
 194 #ifdef HAVE_PCAP_REMOTE
 195         device.local = TRUE;
 196         device.remote_opts.src_type = CAPTURE_IFLOCAL;
 197         device.remote_opts.remote_host_opts.remote_host = g_strdup(global_capture_opts.default_options.remote_host);
 198         device.remote_opts.remote_host_opts.remote_port = g_strdup(global_capture_opts.default_options.remote_port);
 199         device.remote_opts.remote_host_opts.auth_type = global_capture_opts.default_options.auth_type;
 200         device.remote_opts.remote_host_opts.auth_username = g_strdup(global_capture_opts.default_options.auth_username);
 201         device.remote_opts.remote_host_opts.auth_password = g_strdup(global_capture_opts.default_options.auth_password);
 202         device.remote_opts.remote_host_opts.datatx_udp = global_capture_opts.default_options.datatx_udp;
 203         device.remote_opts.remote_host_opts.nocap_rpcap = global_capture_opts.default_options.nocap_rpcap;
 204         device.remote_opts.remote_host_opts.nocap_local = global_capture_opts.default_options.nocap_local;
 205 #endif
 206 #ifdef HAVE_PCAP_SETSAMPLING
 207         device.remote_opts.sampling_method = global_capture_opts.default_options.sampling_method;
 208         device.remote_opts.sampling_param  = global_capture_opts.default_options.sampling_param;
 209 #endif
 210         linktype_count = 0;
 211         device.links = NULL;
 212         if (caps != NULL) {
 213 #if defined(HAVE_PCAP_CREATE)
 214             device.monitor_mode_enabled = monitor_mode;
 215             device.monitor_mode_supported = caps->can_set_rfmon;
 216 #endif
 217             for (lt_entry = caps->data_link_types; lt_entry != NULL; lt_entry = g_list_next(lt_entry)) {
 218                 data_link_info = (data_link_info_t *)lt_entry->data;
 219                 if (linktype_count == 0) {
 220                     device.active_dlt = data_link_info->dlt;
 221                 }
 222                 link = (link_row *)g_malloc(sizeof(link_row));
 223                 if (data_link_info->description != NULL) {
 224                     link->dlt = data_link_info->dlt;
 225                     link->name = g_strdup_printf("%s", data_link_info->description);
 226                 } else {
 227                     link->dlt = -1;
 228                     link->name = g_strdup_printf("%s (not supported)", data_link_info->name);
 229                 }
 230                 device.links = g_list_append(device.links, link);
 231                 linktype_count++;
 232             }
 233         } else {
 234 #if defined(HAVE_PCAP_CREATE)
 235             device.monitor_mode_enabled = FALSE;
 236             device.monitor_mode_supported = FALSE;
 237 #endif
 238             device.active_dlt = -1;
 239         }
 240         device.addresses = g_strdup(ip_str->str);
 241         device.no_addresses = ips;
 242         device.local = TRUE;
 243         device.if_info = *temp;
 244         device.last_packets = 0;
 245         if ((device.pmode = capture_dev_user_pmode_find(if_info->name)) == -1) {
 246             device.pmode = global_capture_opts.default_options.promisc_mode;
 247         }
 248         if ((device.has_snaplen = capture_dev_user_hassnap_find(if_info->name)) == -1) {
 249             device.has_snaplen = global_capture_opts.default_options.has_snaplen;
 250         }
 251         if (capture_dev_user_snaplen_find(if_info->name) == -1) {
 252             device.snaplen = global_capture_opts.default_options.snaplen;
 253         } else {
 254             device.snaplen = (guint)capture_dev_user_snaplen_find(if_info->name);
 255         }
 256         device.cfilter      = g_strdup(global_capture_opts.default_options.cfilter);
 257 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
 258         if ((device.buffer = capture_dev_user_buffersize_find(if_info->name)) == -1) {
 259             device.buffer = global_capture_opts.default_options.buffer_size;
 260         }
 261 #endif
 262
 263         if (global_capture_opts.ifaces->len > 0) {
 264             for (j = 0; j < global_capture_opts.ifaces->len; j++) {
 265                 interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, j);
 266                 if (strcmp(interface_opts.name, device.name) == 0) {
 267 #if defined(HAVE_PCAP_CREATE)
 268                     device.buffer = interface_opts.buffer_size;
 269                     device.monitor_mode_enabled = interface_opts.monitor_mode;
 270 #endif
 271                     device.pmode = interface_opts.promisc_mode;
 272                     device.has_snaplen = interface_opts.has_snaplen;
 273                     device.snaplen = interface_opts.snaplen;
 274                     device.cfilter = g_strdup(interface_opts.cfilter);
 275                     if (interface_opts.linktype != -1) {
 276                         device.active_dlt = interface_opts.linktype;
 277                     }
 278                     device.selected = TRUE;
 279                     global_capture_opts.num_selected++;
 280                     break;
 281                 }
 282             }
 283         }
 284         if (global_capture_opts.all_ifaces->len <= count) {
 285             g_array_append_val(global_capture_opts.all_ifaces, device);
 286             count = global_capture_opts.all_ifaces->len;
 287         } else {
 288             g_array_insert_val(global_capture_opts.all_ifaces, count, device);
 289         }
 290         if (caps != NULL) {
 291             free_if_capabilities(caps);
 292         }
 293
 294         g_string_free(ip_str, TRUE);
 295         count++;
 296     }
 297     free_interface_list(if_list);
 298     /* see whether there are additional interfaces in ifaces */
 299     for (j = 0; j < global_capture_opts.ifaces->len; j++) {
 300         interface_opts = g_array_index(global_capture_opts.ifaces, interface_options, j);
 301         found = FALSE;
 302         for (i = 0; i < (int)global_capture_opts.all_ifaces->len; i++) {
 303             device = g_array_index(global_capture_opts.all_ifaces, interface_t, i);
 304             if (strcmp(device.name, interface_opts.name) == 0) {
 305                 found = TRUE;
 306                 break;
 307             }
 308         }
 309         if (!found) {  /* new interface, maybe a pipe */
 310             device.name         = g_strdup(interface_opts.name);
 311             device.display_name = g_strdup_printf("%s: %s", device.name, interface_opts.descr);
 312             device.hidden       = FALSE;
 313             device.selected     = TRUE;
 314             device.type         = IF_PIPE;
 315 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
 316             device.buffer = interface_opts.buffer_size;
 317 #endif
 318 #if defined(HAVE_PCAP_CREATE)
 319             device.monitor_mode_enabled = interface_opts.monitor_mode;
 320             device.monitor_mode_supported = FALSE;
 321 #endif
 322             device.pmode = interface_opts.promisc_mode;
 323             device.has_snaplen = interface_opts.has_snaplen;
 324             device.snaplen = interface_opts.snaplen;
 325             device.cfilter = g_strdup(interface_opts.cfilter);
 326             device.active_dlt = interface_opts.linktype;
 327             device.addresses    = NULL;
 328             device.no_addresses = 0;
 329             device.last_packets = 0;
 330             device.links        = NULL;
 331             device.local        = TRUE;
 332             device.locked       = FALSE;
 333             device.if_info.name = g_strdup(interface_opts.name);
 334             device.if_info.friendly_name = NULL;
 335             device.if_info.vendor_description = g_strdup(interface_opts.descr);
 336             device.if_info.addrs = NULL;
 337             device.if_info.loopback = FALSE;
 338
 339             g_array_append_val(global_capture_opts.all_ifaces, device);
 340             global_capture_opts.num_selected++;
 341         }
 342     }
 343 }
 344
 345 /*
 346  * Get the global interface list.  Generate it if we haven't
 347  * done so already.
 348  */
 349 void
 350 fill_in_local_interfaces(void)
 351 {
 352     static gboolean initialized = FALSE;
 353
 354     if (!initialized) {
 355         scan_local_interfaces();
 356         initialized = TRUE;
 357     }
 358 }
 359
 360 void
 361 hide_interface(gchar* new_hide)
 362 {
 363     gchar       *tok;
 364     guint       i;
 365     interface_t device;
 366     gboolean    found = FALSE;
 367     GList       *hidden_devices = NULL, *entry;
 368     if (new_hide != NULL) {
 369         for (tok = strtok (new_hide, ","); tok; tok = strtok(NULL, ",")) {
 370             hidden_devices = g_list_append(hidden_devices, tok);
 371         }
 372     }
 373     for (i = 0; i < global_capture_opts.all_ifaces->len; i++) {
 374         device = g_array_index(global_capture_opts.all_ifaces, interface_t, i);
 375         found = FALSE;
 376         for (entry = hidden_devices; entry != NULL; entry = g_list_next(entry)) {
 377             if (strcmp((char *)entry->data, device.name)==0) {
 378                 device.hidden = TRUE;
 379                 if (device.selected) {
 380                     device.selected = FALSE;
 381                     global_capture_opts.num_selected--;
 382                 }
 383                 found = TRUE;
 384                 break;
 385             }
 386         }
 387         if (!found) {
 388             device.hidden = FALSE;
 389         }
 390         global_capture_opts.all_ifaces = g_array_remove_index(global_capture_opts.all_ifaces, i);
 391         g_array_insert_val(global_capture_opts.all_ifaces, i, device);
 392     }
 393 }
 394 #endif /* HAVE_LIBPCAP */
 395
 396 /*
 397  * Editor modelines
 398  *
 399  * Local Variables:
 400  * c-basic-offset: 4
 401  * tab-width: 8
 402  * indent-tabs-mode: nil
 403  * End:
 404  *
 405  * ex: set shiftwidth=4 tabstop=8 expandtab:
 406  * :indentSize=4:tabSize=8:noTabs=true:
 407  */