1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545
|
/* capture_ui_utils.c
* Utilities for capture user interfaces
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#ifdef HAVE_LIBPCAP
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <glib.h>
#include "epan/prefs.h"
#include "epan/ex-opt.h"
#include "capture_ifinfo.h"
#include "capture_ui_utils.h"
#include "wiretap/wtap.h"
#include "epan/to_str.h"
/*
* Find user-specified capture device description that matches interface
* name, if any.
*/
char *
capture_dev_user_descr_find(const gchar *if_name)
{
char *p;
char *p2 = NULL;
char *descr = NULL;
int lp = 0;
int ct = 0;
if ((prefs.capture_devices_descr == NULL) ||
(*prefs.capture_devices_descr == '\0')) {
/* There are no descriptions. */
return NULL;
}
if ((p = strstr(prefs.capture_devices_descr, if_name)) == NULL) {
/* There are, but there isn't one for this interface. */
return NULL;
}
while (*p != '\0') {
/* error: ran into next interface description */
if (*p == ',')
return NULL;
/* found left parenthesis, start of description */
else if (*p == '(') {
ct = 0;
lp++;
/* skip over left parenthesis */
p++;
/* save pointer to beginning of description */
p2 = p;
continue;
}
else if (*p == ')') {
/* end of description */
break;
}
else {
p++;
ct++;
}
}
if ((lp == 1) && (ct > 0) && (p2 != NULL)) {
/* Allocate enough space to return the string,
which runs from p2 to p, plus a terminating
'\0'. */
descr = (char *)g_malloc(p - p2 + 1);
memcpy(descr, p2, p - p2);
descr[p - p2] = '\0';
return descr;
}
else
return NULL;
}
gint
capture_dev_user_linktype_find(const gchar *if_name)
{
gchar *p, *next;
long linktype;
if ((prefs.capture_devices_linktypes == NULL) ||
(*prefs.capture_devices_linktypes == '\0')) {
/* There are no link-layer header types */
return -1;
}
if ((p = strstr(prefs.capture_devices_linktypes, if_name)) == NULL) {
/* There are, but there isn't one for this interface. */
return -1;
}
p += strlen(if_name) + 1;
linktype = strtol(p, &next, 10);
if (next == p || *next != ')' || linktype < 0) {
/* Syntax error */
return -1;
}
if (linktype > G_MAXINT) {
/* Value doesn't fit in a gint */
return -1;
}
return (gint)linktype;
}
#if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
gint
capture_dev_user_buffersize_find(const gchar *if_name)
{
gchar *p, *next;
gint buffersize;
if ((prefs.capture_devices_buffersize == NULL) ||
(*prefs.capture_devices_buffersize == '\0')) {
/* There are no buffersizes defined */
return -1;
}
if ((p = strstr(prefs.capture_devices_buffersize, if_name)) == NULL) {
/* There are, but there isn't one for this interface. */
return -1;
}
p += strlen(if_name) + 1;
buffersize = (gint)strtol(p, &next, 10);
if (next == p || *next != ')' || buffersize < 0) {
/* Syntax error */
return -1;
}
if (buffersize > G_MAXINT) {
/* Value doesn't fit in a gint */
return -1;
}
return (gint)buffersize;
}
#endif
gint
capture_dev_user_snaplen_find(const gchar *if_name)
{
gchar *p, *next;
gint snaplen;
if ((prefs.capture_devices_snaplen == NULL) ||
(*prefs.capture_devices_snaplen == '\0')) {
/* There is no snap length defined */
return -1;
}
if ((p = strstr(prefs.capture_devices_snaplen, if_name)) == NULL) {
/* There are, but there isn't one for this interface. */
return -1;
}
p += strlen(if_name) + 3;
snaplen = (gint)strtol(p, &next, 10);
if (next == p || *next != ')' || snaplen < 0) {
/* Syntax error */
return -1;
}
if (snaplen > WTAP_MAX_PACKET_SIZE) {
/* Value doesn't fit in a gint */
return -1;
}
return (gint)snaplen;
}
gboolean
capture_dev_user_hassnap_find(const gchar *if_name)
{
gchar *p, *next;
gboolean hassnap;
if ((prefs.capture_devices_snaplen == NULL) ||
(*prefs.capture_devices_snaplen == '\0')) {
/* There is no snap length defined */
return -1;
}
if ((p = strstr(prefs.capture_devices_snaplen, if_name)) == NULL) {
/* There are, but there isn't one for this interface. */
return -1;
}
p += strlen(if_name) + 1;
hassnap = (gboolean)strtol(p, &next, 10);
if (next == p || *next != '(') {
/* Syntax error */
return -1;
}
return (gboolean)hassnap;
}
gboolean
capture_dev_user_pmode_find(const gchar *if_name)
{
gchar *p, *next;
gboolean pmode;
if ((prefs.capture_devices_pmode == NULL) ||
(*prefs.capture_devices_pmode == '\0')) {
/* There is no promiscuous mode defined */
return -1;
}
if ((p = strstr(prefs.capture_devices_pmode, if_name)) == NULL) {
/* There are, but there isn't one for this interface. */
return -1;
}
p += strlen(if_name) + 1;
pmode = (gboolean)strtol(p, &next, 10);
if (next == p || *next != ')') {
/* Syntax error */
return -1;
}
return (gboolean)pmode;
}
/*
* Return as descriptive a name for an interface as we can get.
* If the user has specified a comment, use that. Otherwise,
* if capture_interface_list() supplies a description, use that,
* otherwise use the interface name.
*
* The result must be g_free()'d when you're done with it.
*
* Note: given that this calls capture_interface_list(), which attempts to
* open all adapters it finds in order to check whether they can be
* captured on, this is an expensive routine to call, so don't call it
* frequently.
*/
char *
get_interface_descriptive_name(const char *if_name)
{
char *descr;
GList *if_list;
GList *if_entry;
if_info_t *if_info;
int err;
/* Do we have a user-supplied description? */
descr = capture_dev_user_descr_find(if_name);
if (descr != NULL) {
/* Yes - make a copy of that. */
descr = g_strdup(descr);
} else if (strcmp(if_name, "-") == 0) {
/*
* Strictly speaking, -X (extension) options are for modules, e.g. Lua
* and using one here stretches that definition. However, this doesn't
* waste a single-letter option on something that might be rarely used
* and is backward-compatible to 1.0.
*/
descr = g_strdup(ex_opt_get_nth("stdin_descr", 0));
if (!descr) {
descr = g_strdup("Standard input");
}
} else {
/* No, we don't have a user-supplied description; did we get
one from the OS or libpcap? */
descr = NULL;
if_list = capture_interface_list(&err, NULL, NULL);
if (if_list != NULL) {
if_entry = if_list;
do {
if_info = (if_info_t *)if_entry->data;
if (strcmp(if_info->name, if_name) == 0) {
if (if_info->friendly_name != NULL) {
/* We have a "friendly name"; return a copy of that
as the description - when we free the interface
list, that'll also free up the strings to which
it refers. */
descr = g_strdup(if_info->friendly_name);
} else if (if_info->vendor_description != NULL) {
/* We have no "friendly name", but we have a vendor
description; return a copy of that - when we free
the interface list, that'll also free up the strings
to which it refers. */
descr = g_strdup(if_info->vendor_description);
}
break;
}
} while ((if_entry = g_list_next(if_entry)) != NULL);
}
free_interface_list(if_list);
if (descr == NULL) {
/* The interface name is all we have, so just return a copy of that. */
descr = g_strdup(if_name);
}
}
return descr;
}
/* search interface info by interface name */
static if_info_t *
search_info(GList *if_list, gchar *if_name)
{
GList *if_entry;
if_info_t *if_info;
for (if_entry = if_list; if_entry != NULL; if_entry = g_list_next(if_entry)) {
if_info = (if_info_t *)if_entry->data;
if(strcmp(if_name, if_info->name) == 0) {
return if_info;
}
}
return NULL;
}
/* build the string to display in the combo box for the given interface */
char *
build_capture_combo_name(GList *if_list, gchar *if_name)
{
gchar *descr;
char *if_string;
if_info_t *if_info;
/* Do we have a user-supplied description? */
descr = capture_dev_user_descr_find(if_name);
if (descr != NULL) {
/* Yes, we have a user-supplied description; use it. */
if_string = g_strdup_printf("%s: %s", descr, if_name);
g_free(descr);
} else {
/* No, we don't have a user-supplied description; did we get
one from the OS or libpcap? */
if_info = search_info(if_list, if_name);
if (if_info != NULL && if_info->vendor_description != NULL) {
/* Yes - use it. */
if_string = g_strdup_printf("%s: %s", if_info->vendor_description,
if_info->name);
} else {
/* No. */
if_string = g_strdup(if_name);
}
}
return if_string;
}
GList *
build_capture_combo_list(GList *if_list, gboolean do_hide)
{
GList *combo_list;
GList *if_entry;
if_info_t *if_info;
char *if_string;
gchar *descr;
combo_list = NULL;
if (if_list != NULL) {
/* Scan through the list and build a list of strings to display. */
for (if_entry = if_list; if_entry != NULL;
if_entry = g_list_next(if_entry)) {
if_info = (if_info_t *)if_entry->data;
/* Is this interface hidden and, if so, should we include it
anyway? */
if (!prefs_is_capture_device_hidden(if_info->name) || !do_hide) {
/* It's not hidden, or it is but we should include it in the list. */
/* Do we have a user-supplied description? */
descr = capture_dev_user_descr_find(if_info->name);
if (descr != NULL) {
/* Yes, we have a user-supplied description; use it. */
if_string = g_strdup_printf("%s: %s", descr, if_info->name);
g_free(descr);
} else {
/* No, we don't have a user-supplied description; did we get
one from the OS or libpcap? */
if (if_info->vendor_description != NULL) {
/* Yes - use it. */
if_string = g_strdup_printf("%s: %s",
if_info->vendor_description,
if_info->name);
} else {
/* No. */
if_string = g_strdup(if_info->name);
}
}
combo_list = g_list_append(combo_list, if_string);
}
}/*for*/
}
return combo_list;
}
static void
free_if_string(gpointer data, gpointer user_data _U_)
{
g_free(data);
}
void
free_capture_combo_list(GList *combo_list)
{
if (combo_list != NULL) {
g_list_foreach(combo_list, free_if_string, NULL);
g_list_free(combo_list);
}
}
/*
* Given text that contains an interface name possibly prefixed by an
* interface description, extract the interface name.
*/
const char *
get_if_name(const char *if_text)
{
const char *if_name;
#ifdef _WIN32
/*
* We cannot assume that the interface name doesn't contain a space;
* some names on Windows OT do.
*
* We also can't assume it begins with "\Device\", either, as, on
* Windows OT, WinPcap doesn't put "\Device\" in front of the name.
*
* As I remember, we can't assume that the interface description
* doesn't contain a colon, either; I think some do.
*
* We can probably assume that the interface *name* doesn't contain
* a colon, however; if any interface name does contain a colon on
* Windows, it'll be time to just get rid of the damn interface
* descriptions in the drop-down list, have just the names in the
* drop-down list, and have a "Browse..." button to browse for interfaces,
* with names, descriptions, IP addresses, blah blah blah available when
* possible.
*
* So we search backwards for a colon. If we don't find it, just
* return the entire string; otherwise, skip the colon and any blanks
* after it, and return that string.
*/
if_name = if_text + strlen(if_text);
for (;;) {
if (if_name == if_text) {
/* We're at the beginning of the string; return it. */
break;
}
if_name--;
if (*if_name == ':') {
/*
* We've found a colon.
* Unfortunately, a colon is used in the string "rpcap://",
* which is used in case of a remote capture.
* So we'll check to make sure the colon isn't followed by "//";
* it'll be followed by a blank if it separates the description
* and the interface name. (We don't wire in "rpcap", in case we
* support other protocols in the same syntax.)
* Unfortunately, another colon can be used in "rpcap://host:port/"
* before port. Check if colon is followed by digit.
*/
if ((strncmp(if_name, "://", 3) != 0) && !isdigit(if_name[1])) {
/*
* OK, we've found a colon followed neither by "//" nor by digit.
* Skip blanks following it.
*/
if_name++;
while (*if_name == ' ')
if_name++;
break;
}
}
/* Keep looking for a colon not followed by "//". */
}
#else
/*
* There's a space between the interface description and name, and
* the interface name shouldn't have a space in it (it doesn't, on
* UNIX systems); look backwards in the string for a space.
*
* (An interface name might, however, contain a colon in it, which
* is why we don't use the colon search on UNIX.)
*/
if_name = strrchr(if_text, ' ');
if (if_name == NULL) {
if_name = if_text;
} else {
if_name++;
}
#endif
return if_name;
}
/* Return interface_opts->descr (after setting it if it is not set)
* This is necessary because capture_opts.c can't set descr (at least
* not without adding significant dependencies there).
*/
const char *
get_iface_description_for_interface(capture_options *capture_opts, guint i)
{
interface_options interface_opts;
if (i < capture_opts->ifaces->len) {
interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
if (!interface_opts.descr && interface_opts.name) {
interface_opts.descr = get_interface_descriptive_name(interface_opts.name);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, i);
g_array_insert_val(capture_opts->ifaces, i, interface_opts);
}
return (interface_opts.descr);
} else {
return (NULL);
}
}
#endif /* HAVE_LIBPCAP */
|