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airpcap_loader.c
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/* airpcap_loader.c
*
* $Id$
*
* Giorgio Tino <[email protected]>
* Copyright (c) CACE Technologies, LLC 2006
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <[email protected]>
* Copyright 2000 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_AIRPCAP
#ifdef HAVE_LIBPCAP
#include <glib.h>
#include <gmodule.h>
#include <wtap.h>
#include <pcap.h>
#endif
#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/prefs-int.h>
#include <epan/crypt/wep-wpadefs.h>
#include <epan/crypt/airpdcap_ws.h>
#include <epan/strutil.h>
#include <epan/frequency-utils.h>
#include "capture_ui_utils.h"
#include <wsutil/file_util.h>
#include "ui/simple_dialog.h"
#include <airpcap.h>
#include "airpcap_loader.h"
/*
* Set to TRUE if the DLL was successfully loaded AND all functions
* are present.
*/
static gboolean AirpcapLoaded = FALSE;
#ifdef _WIN32
/*
* We load dynamically the dag library in order link it only when
* it's present on the system
*/
static void * AirpcapLib = NULL;
static AirpcapGetLastErrorHandler g_PAirpcapGetLastError;
static AirpcapSetKernelBufferHandler g_PAirpcapSetKernelBuffer;
static AirpcapSetFilterHandler g_PAirpcapSetFilter;
static AirpcapGetMacAddressHandler g_PAirpcapGetMacAddress;
static AirpcapSetMinToCopyHandler g_PAirpcapSetMinToCopy;
static AirpcapGetReadEventHandler g_PAirpcapGetReadEvent;
static AirpcapReadHandler g_PAirpcapRead;
static AirpcapGetStatsHandler g_PAirpcapGetStats;
#endif
static int AirpcapVersion = 3;
static AirpcapGetDeviceListHandler g_PAirpcapGetDeviceList;
static AirpcapFreeDeviceListHandler g_PAirpcapFreeDeviceList;
static AirpcapOpenHandler g_PAirpcapOpen;
static AirpcapCloseHandler g_PAirpcapClose;
static AirpcapGetLinkTypeHandler g_PAirpcapGetLinkType;
static AirpcapSetLinkTypeHandler g_PAirpcapSetLinkType;
static AirpcapTurnLedOnHandler g_PAirpcapTurnLedOn;
static AirpcapTurnLedOffHandler g_PAirpcapTurnLedOff;
static AirpcapGetDeviceChannelHandler g_PAirpcapGetDeviceChannel;
static AirpcapSetDeviceChannelHandler g_PAirpcapSetDeviceChannel;
static AirpcapGetFcsPresenceHandler g_PAirpcapGetFcsPresence;
static AirpcapSetFcsPresenceHandler g_PAirpcapSetFcsPresence;
static AirpcapGetFcsValidationHandler g_PAirpcapGetFcsValidation;
static AirpcapSetFcsValidationHandler g_PAirpcapSetFcsValidation;
static AirpcapGetDeviceKeysHandler g_PAirpcapGetDeviceKeys;
static AirpcapSetDeviceKeysHandler g_PAirpcapSetDeviceKeys;
static AirpcapGetDriverKeysHandler g_PAirpcapGetDriverKeys;
static AirpcapSetDriverKeysHandler g_PAirpcapSetDriverKeys;
static AirpcapGetDecryptionStateHandler g_PAirpcapGetDecryptionState;
static AirpcapSetDecryptionStateHandler g_PAirpcapSetDecryptionState;
static AirpcapGetDriverDecryptionStateHandler g_PAirpcapGetDriverDecryptionState;
static AirpcapSetDriverDecryptionStateHandler g_PAirpcapSetDriverDecryptionState;
static AirpcapStoreCurConfigAsAdapterDefaultHandler g_PAirpcapStoreCurConfigAsAdapterDefault;
static AirpcapGetVersionHandler g_PAirpcapGetVersion;
static AirpcapSetDeviceChannelExHandler g_PAirpcapSetDeviceChannelEx;
static AirpcapGetDeviceChannelExHandler g_PAirpcapGetDeviceChannelEx;
static AirpcapGetDeviceSupportedChannelsHandler g_PAirpcapGetDeviceSupportedChannels;
/* Airpcap interface list */
GList *airpcap_if_list = NULL;
/* Airpcap current selected interface */
airpcap_if_info_t *airpcap_if_selected = NULL;
/* Airpcap current active interface */
airpcap_if_info_t *airpcap_if_active = NULL;
/* WLAN preferences pointer */
module_t *wlan_prefs = NULL;
Dot11Channel *pSupportedChannels;
guint numSupportedChannels;
static AirpcapChannelInfo LegacyChannels[] =
{
{2412, 0, {0,0,0}},
{2417, 0, {0,0,0}},
{2422, 0, {0,0,0}},
{2427, 0, {0,0,0}},
{2432, 0, {0,0,0}},
{2437, 0, {0,0,0}},
{2442, 0, {0,0,0}},
{2447, 0, {0,0,0}},
{2452, 0, {0,0,0}},
{2457, 0, {0,0,0}},
{2462, 0, {0,0,0}},
{2467, 0, {0,0,0}},
{2472, 0, {0,0,0}},
{2484, 0, {0,0,0}},
};
static guint num_legacy_channels = 14;
/*
* Callback used by the load_wlan_keys() routine in order to read a WEP decryption key
*/
static guint
get_wep_key(pref_t *pref, gpointer ud)
{
gchar *key_string = NULL;
guint8 key_type = AIRPDCAP_KEY_TYPE_WEP;
keys_cb_data_t* user_data;
decryption_key_t* new_key;
/* Retrieve user data info */
user_data = (keys_cb_data_t*)ud;
if (g_ascii_strncasecmp(pref->name, "wep_key", 7) == 0 && pref->type == PREF_STRING)
{
/* strip out key type */
if (g_ascii_strncasecmp(*pref->varp.string, STRING_KEY_TYPE_WEP ":", 4) == 0) {
key_string = (gchar*)(*pref->varp.string)+4;
}
else if (g_ascii_strncasecmp(*pref->varp.string, STRING_KEY_TYPE_WPA_PWD ":", 8) == 0) {
key_string = (gchar*)(*pref->varp.string)+8;
key_type = AIRPDCAP_KEY_TYPE_WPA_PWD;
}
else if (g_ascii_strncasecmp(*pref->varp.string, STRING_KEY_TYPE_WPA_PSK ":", 8) == 0) {
key_string = (gchar*)(*pref->varp.string)+8;
key_type = AIRPDCAP_KEY_TYPE_WPA_PSK;
}
else {
key_type = AIRPDCAP_KEY_TYPE_WEP;
key_string = (gchar*)*pref->varp.string;
}
/* Here we have the string describing the key... */
new_key = parse_key_string(key_string, key_type);
if( new_key != NULL)
{
/* Key is added only if not null ... */
user_data->list = g_list_append(user_data->list,new_key);
user_data->number_of_keys++;
user_data->current_index++;
}
}
return 0;
}
/* Returs TRUE if the WEP key is valid, false otherwise */
gboolean
wep_key_is_valid(char* key)
{
GString *new_key_string;
guint i=0;
if(key == NULL)
return FALSE;
new_key_string = g_string_new(key);
if( ((new_key_string->len) > WEP_KEY_MAX_CHAR_SIZE) || ((new_key_string->len) < 2))
{
g_string_free(new_key_string,FALSE);
return FALSE;
}
if((new_key_string->len % 2) != 0)
{
g_string_free(new_key_string,FALSE);
return FALSE;
}
for(i = 0; i < new_key_string->len; i++)
{
if(!g_ascii_isxdigit(new_key_string->str[i]))
{
g_string_free(new_key_string,FALSE);
return FALSE;
}
}
g_string_free(new_key_string,FALSE);
return TRUE;
}
/* Callback used by the save_wlan_keys() routine in order to write a decryption key */
static guint
set_wep_key(pref_t *pref, gpointer ud _U_)
{
gchar *my_string = NULL;
keys_cb_data_t* user_data;
gint wep_key_number = 0;
decryption_key_t* new_key;
/* Retrieve user data info */
user_data = (keys_cb_data_t*)ud;
if (g_ascii_strncasecmp(pref->name, "wep_key", 7) == 0 && pref->type == PREF_STRING)
{
/* Ok, the pref we're gonna set is a wep_key ... but what number? */
sscanf(pref->name,"wep_key%d",&wep_key_number);
if(user_data->current_index < user_data->number_of_keys)
{
if(wep_key_number == (user_data->current_index+1))
{
/* Retrieve the nth decryption_key_t structure pointer */
new_key = (decryption_key_t*)g_list_nth_data(user_data->list,user_data->current_index);
/* Free the old key string */
g_free((void *)*pref->varp.string);
/* Create the new string describing the decryption key */
my_string = get_key_string(new_key);
/* Duplicate the string, and assign it to the variable pointer */
*pref->varp.string = (void *)g_strdup(my_string);
/* Free the previously allocated string */
g_free(my_string);
}
}
else /* If the number of keys has been reduced somehow, we need to delete all the other keys
* (remember that the new ones have been probably overwritten)
*/
{
g_free((void *)*pref->varp.string);
*pref->varp.string = (void *)g_strdup(""); /* Do not just free memory!!! Put an 'empty' string! */
}
user_data->current_index++;
}
return 0;
}
/*
* Function used to read the Decryption Keys from the preferences and store them
* properly into the airpcap adapter.
*/
gboolean
load_wlan_driver_wep_keys(void)
{
keys_cb_data_t* user_data;
guint i;
/* Retrieve the wlan preferences */
wlan_prefs = prefs_find_module("wlan");
/* Allocate a structure used to keep infos between the callbacks */
user_data = (keys_cb_data_t*)g_malloc(sizeof(keys_cb_data_t));
/* Fill the structure */
user_data->list = NULL;
user_data->current_index = 0;
user_data->number_of_keys= 0; /* Still unknown */
/* Run the callback on each 802.11 preference */
prefs_pref_foreach(wlan_prefs, get_wep_key, (gpointer)user_data);
/* Now the key list should be filled */
/*
* Signal that we've changed things, and run the 802.11 dissector's
* callback
*/
wlan_prefs->prefs_changed = TRUE;
prefs_apply(wlan_prefs);
write_wlan_driver_wep_keys_to_registry(user_data->list);
/* FREE MEMORY */
/* free the WEP key string */
for(i=0;i<g_list_length(user_data->list);i++)
{
g_free(g_list_nth(user_data->list,i)->data);
}
/* free the (empty) list */
g_list_free(user_data->list);
/* free the user_data structure */
g_free(user_data);
/* airpcap_if_info_free(fake_info_if); */
return TRUE;
}
/*
* This function will tell the airpcap driver the key list to use
* This will be stored into the registry...
*/
gboolean
write_wlan_wep_keys_to_registry(airpcap_if_info_t* info_if, GList* key_list)
{
guint i,j;
GString *new_key;
gchar s[3];
PAirpcapKeysCollection KeysCollection;
guint KeysCollectionSize;
guint8 KeyByte;
guint keys_in_list = 0;
decryption_key_t* key_item = NULL;
keys_in_list = g_list_length(key_list);
/*
* Calculate the size of the keys collection
*/
KeysCollectionSize = sizeof(AirpcapKeysCollection) + keys_in_list * sizeof(AirpcapKey);
/*
* Allocate the collection
*/
KeysCollection = (PAirpcapKeysCollection)g_malloc(KeysCollectionSize);
if(!KeysCollection)
{
return FALSE;
}
/*
* Populate the key collection
*/
KeysCollection->nKeys = keys_in_list;
for(i = 0; i < keys_in_list; i++)
{
KeysCollection->Keys[i].KeyType = AIRPDCAP_KEY_TYPE_WEP;
/* Retrieve the Item corresponding to the i-th key */
key_item = (decryption_key_t*)g_list_nth_data(key_list,i);
new_key = g_string_new(key_item->key->str);
KeysCollection->Keys[i].KeyLen = (guint) new_key->len / 2;
memset(&KeysCollection->Keys[i].KeyData, 0, sizeof(KeysCollection->Keys[i].KeyData));
for(j = 0 ; j < new_key->len; j += 2)
{
s[0] = new_key->str[j];
s[1] = new_key->str[j+1];
s[2] = '\0';
KeyByte = (guint8)strtol(s, NULL, 16);
KeysCollection->Keys[i].KeyData[j / 2] = KeyByte;
}
g_string_free(new_key,TRUE);
}
/*
* Free the old adapter key collection!
*/
if(info_if->keysCollection != NULL)
g_free(info_if->keysCollection);
/*
* Set this collection ad the new one
*/
info_if->keysCollection = KeysCollection;
info_if->keysCollectionSize = KeysCollectionSize;
/*
* Configuration must be saved
*/
info_if->saved = FALSE;
/*
* Write down the changes to the registry
*/
airpcap_save_selected_if_configuration(info_if);
return TRUE;
}
/*
* This function will tell the airpcap driver the key list to use
* This will be stored into the registry...
*/
gboolean
write_wlan_driver_wep_keys_to_registry(GList* key_list)
{
guint i,j,k,n,y;
GString *new_key;
gchar s[3];
PAirpcapKeysCollection KeysCollection;
guint KeysCollectionSize;
guint8 KeyByte;
guint keys_in_list = 0;
decryption_key_t* key_item = NULL;
airpcap_if_info_t* fake_info_if = NULL;
/* Create the fake_info_if from the first adapter of the list */
fake_info_if = airpcap_driver_fake_if_info_new();
if(fake_info_if == NULL)
return FALSE;
/*
* XXX - When WPA will be supported, change this to: keys_in_list = g_list_length(key_list);
* but right now we will have to count only the WEP keys (or we will have a malloc-mess :-) )
*/
n = g_list_length(key_list);
for(k = 0; k < n; k++ )
if(((decryption_key_t*)g_list_nth_data(key_list,k))->type == AIRPDCAP_KEY_TYPE_WEP)
keys_in_list++;
/*
* Calculate the size of the keys collection
*/
KeysCollectionSize = sizeof(AirpcapKeysCollection) + keys_in_list * sizeof(AirpcapKey);
/*
* Allocate the collection
*/
KeysCollection = (PAirpcapKeysCollection)g_malloc(KeysCollectionSize);
if(!KeysCollection)
{
return FALSE;
}
/*
* Populate the key collection
*/
KeysCollection->nKeys = keys_in_list;
/*
* XXX - If we have, let's say, six keys, the first three are WEP, then two are WPA, and the
* last is WEP, we have to scroll the whole list (n) but increment the array counter only
* when a WEP key is found (y) .. When WPA will be supported by the driver, I'll have to change
* this
*/
y = 0; /* Current position in the key list */
for(i = 0; i < n; i++)
{
/* Retrieve the Item corresponding to the i-th key */
key_item = (decryption_key_t*)g_list_nth_data(key_list,i);
/*
* XXX - The AIRPDCAP_KEY_TYPE_WEP is the only supported right now!
* We will have to modify the AirpcapKey structure in order to
* support the other two types! What happens now, is that simply the
* not supported keys will just be discarded (they will be saved in Wireshark though)
*/
if(key_item->type == AIRPDCAP_KEY_TYPE_WEP)
{
KeysCollection->Keys[y].KeyType = AIRPDCAP_KEY_TYPE_WEP;
new_key = g_string_new(key_item->key->str);
KeysCollection->Keys[y].KeyLen = (guint) new_key->len / 2;
memset(&KeysCollection->Keys[y].KeyData, 0, sizeof(KeysCollection->Keys[y].KeyData));
for(j = 0 ; j < new_key->len; j += 2)
{
s[0] = new_key->str[j];
s[1] = new_key->str[j+1];
s[2] = '\0';
KeyByte = (guint8)strtol(s, NULL, 16);
KeysCollection->Keys[y].KeyData[j / 2] = KeyByte;
}
/* XXX - Change when WPA will be supported!!! */
y++;
g_string_free(new_key,TRUE);
}
else if(key_item->type == AIRPDCAP_KEY_TYPE_WPA_PWD)
{
/* XXX - The driver cannot deal with this kind of key yet... */
}
else if(key_item->type == AIRPDCAP_KEY_TYPE_WPA_PMK)
{
/* XXX - The driver cannot deal with this kind of key yet... */
}
}
/*
* Free the old adapter key collection!
*/
if(fake_info_if->keysCollection != NULL)
g_free(fake_info_if->keysCollection);
/*
* Set this collection ad the new one
*/
fake_info_if->keysCollection = KeysCollection;
fake_info_if->keysCollectionSize = KeysCollectionSize;
/*
* Configuration must be saved
*/
fake_info_if->saved = FALSE;
/*
* Write down the changes to the registry
*/
airpcap_save_driver_if_configuration(fake_info_if);
airpcap_if_info_free(fake_info_if);
return TRUE;
}
/*
* Function used to save to the preference file the Decryption Keys.
*/
int
save_wlan_driver_wep_keys(void)
{
GList* key_list = NULL;
char* tmp_key = NULL;
guint keys_in_list,i;
keys_cb_data_t* user_data;
airpcap_if_info_t* fake_info_if = NULL;
/* Create the fake_info_if from the first adapter of the list */
fake_info_if = airpcap_driver_fake_if_info_new();
if(fake_info_if == NULL)
return 0;
/* Retrieve the wlan preferences */
wlan_prefs = prefs_find_module("wlan");
/* Allocate a structure used to keep infos between the callbacks */
user_data = (keys_cb_data_t*)g_malloc(sizeof(keys_cb_data_t));
/* Number of keys in key list */
if(fake_info_if->keysCollectionSize != 0)
keys_in_list = (guint)(fake_info_if->keysCollectionSize - sizeof(AirpcapKeysCollection))/sizeof(AirpcapKey);
else
keys_in_list = 0;
for(i=0; i<keys_in_list; i++)
{
/* Only if it is a WEP key... */
if(fake_info_if->keysCollection->Keys[i].KeyType == AIRPDCAP_KEY_TYPE_WEP)
{
tmp_key = airpcap_get_key_string(fake_info_if->keysCollection->Keys[i]);
key_list = g_list_append(key_list,g_strdup(tmp_key));
g_free(tmp_key);
}
}
/* Now we know the exact number of WEP keys in the list, so store it ... */
keys_in_list = g_list_length(key_list);
/* Fill the structure */
user_data->list = key_list;
user_data->current_index = 0;
user_data->number_of_keys= keys_in_list;
/* Retrieve the wlan preferences */
wlan_prefs = prefs_find_module("wlan");
/* Run the callback on each 802.11 preference */
prefs_pref_foreach(wlan_prefs, set_wep_key, (gpointer)user_data);
/* Signal that we've changed things, and run the 802.11 dissector's
* callback */
wlan_prefs->prefs_changed = TRUE;
/* Apply changes for the specified preference */
prefs_apply(wlan_prefs);
/* FREE MEMORY */
/* free the WEP key string */
for(i=0;i<g_list_length(user_data->list);i++)
{
g_free(g_list_nth(user_data->list,i)->data);
}
/* free the (empty) list */
g_list_free(user_data->list);
/* free the user_data structure */
g_free(user_data);
airpcap_if_info_free(fake_info_if);
return keys_in_list;
}
/*
* Function used to save to the preference file the Decryption Keys.
*/
int
save_wlan_wireshark_wep_keys(GList* key_ls)
{
GList* key_list = NULL;
guint keys_in_list,i;
keys_cb_data_t* user_data;
decryption_key_t* tmp_dk;
/* Retrieve the wlan preferences */
wlan_prefs = prefs_find_module("wlan");
/* Allocate a structure used to keep infos between the callbacks */
user_data = (keys_cb_data_t*)g_malloc(sizeof(keys_cb_data_t));
keys_in_list = g_list_length(key_ls);
key_list = key_ls;
/* Fill the structure */
user_data->list = key_list;
user_data->current_index = 0;
user_data->number_of_keys= keys_in_list;
/* Retrieve the wlan preferences */
wlan_prefs = prefs_find_module("wlan");
/* Run the callback on each 802.11 preference */
prefs_pref_foreach(wlan_prefs, set_wep_key, (gpointer)user_data);
/* Signal that we've changed things, and run the 802.11 dissector's
* callback */
wlan_prefs->prefs_changed = TRUE;
/* Apply changes for the specified preference */
prefs_apply(wlan_prefs);
/* FREE MEMORY */
/* free the WEP key string */
for(i=0;i<g_list_length(user_data->list);i++)
{
tmp_dk = (decryption_key_t*)g_list_nth(user_data->list,i)->data;
g_string_free(tmp_dk->key,TRUE);
if(tmp_dk->ssid != NULL) g_byte_array_free(tmp_dk->ssid,TRUE);
}
/* free the (empty) list */
g_list_free(user_data->list);
/* free the user_data structure */
g_free(user_data);
return keys_in_list;
}
/*
* Get an error message string for a CANT_GET_INTERFACE_LIST error from
* "get_airpcap_interface_list()".
*/
static gchar *
cant_get_airpcap_if_list_error_message(const char *err_str)
{
return g_strdup_printf("Can't get list of Wireless interfaces: %s", err_str);
}
/*
* Airpcap wrapper, used to store the current settings for the selected adapter
*/
gboolean
airpcap_if_store_cur_config_as_adapter_default(PAirpcapHandle ah)
{
if (!AirpcapLoaded) return FALSE;
return g_PAirpcapStoreCurConfigAsAdapterDefault(ah);
}
/*
* Airpcap wrapper, used to open an airpcap adapter
*/
PAirpcapHandle
airpcap_if_open(gchar * name, gchar * err)
{
if (!AirpcapLoaded) return NULL;
if (name == NULL) return NULL;
return g_PAirpcapOpen(name,err);
}
/*
* Airpcap wrapper, used to close an airpcap adapter
*/
void
airpcap_if_close(PAirpcapHandle handle)
{
if (!AirpcapLoaded) return;
g_PAirpcapClose(handle);
}
/*
* Retrieve the state of the Airpcap DLL
*/
int
airpcap_get_dll_state(void)
{
return AirpcapVersion;
}
/*
* Airpcap wrapper, used to turn on the led of an airpcap adapter
*/
gboolean
airpcap_if_turn_led_on(PAirpcapHandle AdapterHandle, guint LedNumber)
{
if (!AirpcapLoaded) return FALSE;
return g_PAirpcapTurnLedOn(AdapterHandle,LedNumber);
}
/*
* Airpcap wrapper, used to turn off the led of an airpcap adapter
*/
gboolean
airpcap_if_turn_led_off(PAirpcapHandle AdapterHandle, guint LedNumber)
{
if (!AirpcapLoaded) return FALSE;
return g_PAirpcapTurnLedOff(AdapterHandle,LedNumber);
}
/*
* Airpcap wrapper, used to get the channel of an airpcap adapter
*/
gboolean
airpcap_if_get_device_channel(PAirpcapHandle ah, guint * ch)
{
if (!AirpcapLoaded) return FALSE;
return g_PAirpcapGetDeviceChannel(ah,ch);
}
/*
* Airpcap wrapper, used to get the supported channels of an airpcap adapter
*/
gboolean
airpcap_if_get_device_supported_channels(PAirpcapHandle ah, AirpcapChannelInfo **cInfo, guint * nInfo)
{
if (!AirpcapLoaded) return FALSE;
if (airpcap_get_dll_state() == AIRPCAP_DLL_OLD){
*nInfo = num_legacy_channels;
*cInfo = (AirpcapChannelInfo*)&LegacyChannels;
return TRUE;
} else if (airpcap_get_dll_state() == AIRPCAP_DLL_OK){
return g_PAirpcapGetDeviceSupportedChannels(ah, cInfo, nInfo);
}
return FALSE;
}
/*
* Airpcap wrapper, used to get the supported channels of an airpcap adapter
*/
Dot11Channel*
airpcap_if_get_device_supported_channels_array(PAirpcapHandle ah, guint * pNumSupportedChannels)
{
AirpcapChannelInfo *chanInfo;
guint i=0, j=0, numInfo = 0;
if (!AirpcapLoaded)
return NULL;
if (airpcap_if_get_device_supported_channels(ah, &chanInfo, &numInfo) == FALSE)
return NULL;
numSupportedChannels = 0;
/*
* allocate a bigger array
*/
if (numInfo == 0)
return NULL;
pSupportedChannels = g_malloc(numInfo * (sizeof *pSupportedChannels));
for (i = 0; i < numInfo; i++)
{
guint supportedChannel = G_MAXUINT;
/*
* search if we have it already
*/
for (j = 0; j < numSupportedChannels; j++)
{
if (pSupportedChannels[j].Frequency == chanInfo[i].Frequency)
{
supportedChannel = j;
break;
}
}
if (supportedChannel == G_MAXUINT)
{
/*
* not found, create a new item
*/
pSupportedChannels[numSupportedChannels].Frequency = chanInfo[i].Frequency;
switch(chanInfo[i].ExtChannel)
{
case -1:
pSupportedChannels[numSupportedChannels].Flags = FLAG_CAN_BE_LOW;
break;
case +1:
pSupportedChannels[numSupportedChannels].Flags = FLAG_CAN_BE_HIGH;
break;
case 0:
default:
pSupportedChannels[numSupportedChannels].Flags = 0;
}
/*
* Gather channel information
*/
pSupportedChannels[numSupportedChannels].Flags |=
FREQ_IS_BG(pSupportedChannels[numSupportedChannels].Frequency) ?
FLAG_IS_BG_CHANNEL : FLAG_IS_A_CHANNEL;
pSupportedChannels[numSupportedChannels].Channel =
ieee80211_mhz_to_chan(pSupportedChannels[numSupportedChannels].Frequency);
numSupportedChannels++;
}
else
{
/*
* just update the ext channel flags
*/
switch(chanInfo[i].ExtChannel)
{
case -1:
pSupportedChannels[supportedChannel].Flags |= FLAG_CAN_BE_LOW;
break;
case +1:
pSupportedChannels[supportedChannel].Flags |= FLAG_CAN_BE_HIGH;
break;
case 0:
default:
break;
}
}
}
if (numSupportedChannels < 1)
return NULL;
/*
* Now sort the list by frequency
*/
for (i = 0 ; i < numSupportedChannels - 1; i++)
{
for (j = i + 1; j < numSupportedChannels; j++)
{
if (pSupportedChannels[i].Frequency > pSupportedChannels[j].Frequency)
{
Dot11Channel temp = pSupportedChannels[i];
pSupportedChannels[i] = pSupportedChannels[j];
pSupportedChannels[j] = temp;
}
}
}
*pNumSupportedChannels = numSupportedChannels;
return pSupportedChannels;
}
/*
* Airpcap wrapper, used to set the channel of an airpcap adapter
*/
gboolean
airpcap_if_set_device_channel(PAirpcapHandle ah, guint ch)
{
if (!AirpcapLoaded) return FALSE;
return g_PAirpcapSetDeviceChannel(ah,ch);
}
/*
* Airpcap wrapper, used to set the frequency of an airpcap adapter
*/
gboolean
airpcap_if_set_device_channel_ex(PAirpcapHandle ah, AirpcapChannelInfo ChannelInfo)
{
if (!AirpcapLoaded) return FALSE;
if (airpcap_get_dll_state() == AIRPCAP_DLL_OLD){
gint channel = 0;
channel = ieee80211_mhz_to_chan(ChannelInfo.Frequency);
if (channel < 0){
return FALSE;
} else {
return airpcap_if_set_device_channel(ah, channel);
}
} else if (airpcap_get_dll_state() == AIRPCAP_DLL_OK){
return g_PAirpcapSetDeviceChannelEx (ah, ChannelInfo);
}
return FALSE;
}
/*
* Airpcap wrapper, used to get the frequency of an airpcap adapter
*/
gboolean
airpcap_if_get_device_channel_ex(PAirpcapHandle ah, PAirpcapChannelInfo pChannelInfo)
{
if (!AirpcapLoaded) return FALSE;
pChannelInfo->Frequency = 0;
pChannelInfo->ExtChannel = 0;
pChannelInfo->Reserved[0] = 0;
pChannelInfo->Reserved[1] = 0;
pChannelInfo->Reserved[2] = 0;
if (airpcap_get_dll_state() == AIRPCAP_DLL_OLD){
guint channel = 0;
guint chan_freq = 0;
if (!airpcap_if_get_device_channel(ah, &channel)) return FALSE;
chan_freq = ieee80211_chan_to_mhz(channel, TRUE);
if (chan_freq == 0) return FALSE;
pChannelInfo->Frequency = chan_freq;
return TRUE;
} else if (airpcap_get_dll_state() == AIRPCAP_DLL_OK){
return g_PAirpcapGetDeviceChannelEx (ah, pChannelInfo);
}
return FALSE;
}
/*
* Airpcap wrapper, used to get the link type of an airpcap adapter
*/
gboolean
airpcap_if_get_link_type(PAirpcapHandle ah, PAirpcapLinkType lt)
{
if (!AirpcapLoaded) return FALSE;
return g_PAirpcapGetLinkType(ah,lt);
}
/*
* Airpcap wrapper, used to set the link type of an airpcap adapter
*/
gboolean
airpcap_if_set_link_type(PAirpcapHandle ah, AirpcapLinkType lt)
{
if (!AirpcapLoaded) return FALSE;
return g_PAirpcapSetLinkType(ah,lt);
}
/*
* Airpcap wrapper, used to get the fcs presence of an airpcap adapter
*/
gboolean
airpcap_if_get_fcs_presence(PAirpcapHandle ah, gboolean * fcs)
{
if (!AirpcapLoaded) return FALSE;
return g_PAirpcapGetFcsPresence(ah,fcs);
}
/*
* Airpcap wrapper, used to set the fcs presence of an airpcap adapter
*/
gboolean
airpcap_if_set_fcs_presence(PAirpcapHandle ah, gboolean fcs)
{
if (!AirpcapLoaded) return FALSE;
return g_PAirpcapSetFcsPresence(ah,fcs);
}
/*
* Airpcap wrapper, used to get the decryption enabling of an airpcap adapter
*/
gboolean
airpcap_if_get_decryption_state(PAirpcapHandle ah, PAirpcapDecryptionState PEnable)