/*
* IEEE 802.11 Common routines
* Copyright (c) 2002-2015, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include "common.h"
#include "defs.h"
#include "wpa_common.h"
#include "ieee802_11_defs.h"
#include "ieee802_11_common.h"
static int ieee802_11_parse_vendor_specific(const u8 *pos, size_t elen,
struct ieee802_11_elems *elems,
int show_errors)
{
unsigned int oui;
/* first 3 bytes in vendor specific information element are the IEEE
* OUI of the vendor. The following byte is used a vendor specific
* sub-type. */
if (elen < 4) {
if (show_errors) {
wpa_printf(MSG_MSGDUMP, "short vendor specific "
"information element ignored (len=%lu)",
(unsigned long) elen);
}
return -1;
}
oui = WPA_GET_BE24(pos);
switch (oui) {
case OUI_MICROSOFT:
/* Microsoft/Wi-Fi information elements are further typed and
* subtyped */
switch (pos[3]) {
case 1:
/* Microsoft OUI (00:50:F2) with OUI Type 1:
* real WPA information element */
elems->wpa_ie = pos;
elems->wpa_ie_len = elen;
break;
case WMM_OUI_TYPE:
/* WMM information element */
if (elen < 5) {
wpa_printf(MSG_MSGDUMP, "short WMM "
"information element ignored "
"(len=%lu)",
(unsigned long) elen);
return -1;
}
switch (pos[4]) {
case WMM_OUI_SUBTYPE_INFORMATION_ELEMENT:
case WMM_OUI_SUBTYPE_PARAMETER_ELEMENT:
/*
* Share same pointer since only one of these
* is used and they start with same data.
* Length field can be used to distinguish the
* IEs.
*/
elems->wmm = pos;
elems->wmm_len = elen;
break;
case WMM_OUI_SUBTYPE_TSPEC_ELEMENT:
elems->wmm_tspec = pos;
elems->wmm_tspec_len = elen;
break;
default:
wpa_printf(MSG_EXCESSIVE, "unknown WMM "
"information element ignored "
"(subtype=%d len=%lu)",
pos[4], (unsigned long) elen);
return -1;
}
break;
case 4:
/* Wi-Fi Protected Setup (WPS) IE */
elems->wps_ie = pos;
elems->wps_ie_len = elen;
break;
default:
wpa_printf(MSG_EXCESSIVE, "Unknown Microsoft "
"information element ignored "
"(type=%d len=%lu)",
pos[3], (unsigned long) elen);
return -1;
}
break;
case OUI_WFA:
switch (pos[3]) {
case P2P_OUI_TYPE:
/* Wi-Fi Alliance - P2P IE */
elems->p2p = pos;
elems->p2p_len = elen;
break;
case WFD_OUI_TYPE:
/* Wi-Fi Alliance - WFD IE */
elems->wfd = pos;
elems->wfd_len = elen;
break;
case HS20_INDICATION_OUI_TYPE:
/* Hotspot 2.0 */
elems->hs20 = pos;
elems->hs20_len = elen;
break;
case HS20_OSEN_OUI_TYPE:
/* Hotspot 2.0 OSEN */
elems->osen = pos;
elems->osen_len = elen;
break;
default:
wpa_printf(MSG_MSGDUMP, "Unknown WFA "
"information element ignored "
"(type=%d len=%lu)",
pos[3], (unsigned long) elen);
return -1;
}
break;
case OUI_BROADCOM:
switch (pos[3]) {
case VENDOR_HT_CAPAB_OUI_TYPE:
elems->vendor_ht_cap = pos;
elems->vendor_ht_cap_len = elen;
break;
case VENDOR_VHT_TYPE:
if (elen > 4 &&
(pos[4] == VENDOR_VHT_SUBTYPE ||
pos[4] == VENDOR_VHT_SUBTYPE2)) {
elems->vendor_vht = pos;
elems->vendor_vht_len = elen;
} else
return -1;
break;
default:
wpa_printf(MSG_EXCESSIVE, "Unknown Broadcom "
"information element ignored "
"(type=%d len=%lu)",
pos[3], (unsigned long) elen);
return -1;
}
break;
default:
wpa_printf(MSG_EXCESSIVE, "unknown vendor specific "
"information element ignored (vendor OUI "
"%02x:%02x:%02x len=%lu)",
pos[0], pos[1], pos[2], (unsigned long) elen);
return -1;
}
return 0;
}
/**
* ieee802_11_parse_elems - Parse information elements in management frames
* @start: Pointer to the start of IEs
* @len: Length of IE buffer in octets
* @elems: Data structure for parsed elements
* @show_errors: Whether to show parsing errors in debug log
* Returns: Parsing result
*/
ParseRes ieee802_11_parse_elems(const u8 *start, size_t len,
struct ieee802_11_elems *elems,
int show_errors)
{
size_t left = len;
const u8 *pos = start;
int unknown = 0;
os_memset(elems, 0, sizeof(*elems));
while (left >= 2) {
u8 id, elen;
id = *pos++;
elen = *pos++;
left -= 2;
if (elen > left) {
if (show_errors) {
wpa_printf(MSG_DEBUG, "IEEE 802.11 element "
"parse failed (id=%d elen=%d "
"left=%lu)",
id, elen, (unsigned long) left);
wpa_hexdump(MSG_MSGDUMP, "IEs", start, len);
}
return ParseFailed;
}
switch (id) {
case WLAN_EID_SSID:
if (elen > SSID_MAX_LEN) {
wpa_printf(MSG_DEBUG,
"Ignored too long SSID element (elen=%u)",
elen);
break;
}
elems->ssid = pos;
elems->ssid_len = elen;
break;
case WLAN_EID_SUPP_RATES:
elems->supp_rates = pos;
elems->supp_rates_len = elen;
break;
case WLAN_EID_DS_PARAMS:
if (elen < 1)
break;
elems->ds_params = pos;
break;
case WLAN_EID_CF_PARAMS:
case WLAN_EID_TIM:
break;
case WLAN_EID_CHALLENGE:
elems->challenge = pos;
elems->challenge_len = elen;
break;
case WLAN_EID_ERP_INFO:
if (elen < 1)
break;
elems->erp_info = pos;
break;
case WLAN_EID_EXT_SUPP_RATES:
elems->ext_supp_rates = pos;
elems->ext_supp_rates_len = elen;
break;
case WLAN_EID_VENDOR_SPECIFIC:
if (ieee802_11_parse_vendor_specific(pos, elen,
elems,
show_errors))
unknown++;
break;
case WLAN_EID_RSN:
elems->rsn_ie = pos;
elems->rsn_ie_len = elen;
break;
case WLAN_EID_PWR_CAPABILITY:
break;
case WLAN_EID_SUPPORTED_CHANNELS:
elems->supp_channels = pos;
elems->supp_channels_len = elen;
break;
case WLAN_EID_MOBILITY_DOMAIN:
if (elen < sizeof(struct rsn_mdie))
break;
elems->mdie = pos;
elems->mdie_len = elen;
break;
case WLAN_EID_FAST_BSS_TRANSITION:
if (elen < sizeof(struct rsn_ftie))
break;
elems->ftie = pos;
elems->ftie_len = elen;
break;
case WLAN_EID_TIMEOUT_INTERVAL:
if (elen != 5)
break;
elems->timeout_int = pos;
break;
case WLAN_EID_HT_CAP:
if (elen < sizeof(struct ieee80211_ht_capabilities))
break;
elems->ht_capabilities = pos;
break;
case WLAN_EID_HT_OPERATION:
if (elen < sizeof(struct ieee80211_ht_operation))
break;
elems->ht_operation = pos;
break;
case WLAN_EID_MESH_CONFIG:
elems->mesh_config = pos;
elems->mesh_config_len = elen;
break;
case WLAN_EID_MESH_ID:
elems->mesh_id = pos;
elems->mesh_id_len = elen;
break;
case WLAN_EID_PEER_MGMT:
elems->peer_mgmt = pos;
elems->peer_mgmt_len = elen;
break;
case WLAN_EID_VHT_CAP:
if (elen < sizeof(struct ieee80211_vht_capabilities))
break;
elems->vht_capabilities = pos;
break;
case WLAN_EID_VHT_OPERATION:
if (elen < sizeof(struct ieee80211_vht_operation))
break;
elems->vht_operation = pos;
break;
case WLAN_EID_VHT_OPERATING_MODE_NOTIFICATION:
if (elen != 1)
break;
elems->vht_opmode_notif = pos;
break;
case WLAN_EID_LINK_ID:
if (elen < 18)
break;
elems->link_id = pos;
break;
case WLAN_EID_INTERWORKING:
elems->interworking = pos;
elems->interworking_len = elen;
break;
case WLAN_EID_QOS_MAP_SET:
if (elen < 16)
break;
elems->qos_map_set = pos;
elems->qos_map_set_len = elen;
break;
case WLAN_EID_EXT_CAPAB:
elems->ext_capab = pos;
elems->ext_capab_len = elen;
break;
case WLAN_EID_BSS_MAX_IDLE_PERIOD:
if (elen < 3)
break;
elems->bss_max_idle_period = pos;
break;
case WLAN_EID_SSID_LIST:
elems->ssid_list = pos;
elems->ssid_list_len = elen;
break;
case WLAN_EID_AMPE:
elems->ampe = pos;
elems->ampe_len = elen;
break;
case WLAN_EID_MIC:
elems->mic = pos;
elems->mic_len = elen;
/* after mic everything is encrypted, so stop. */
left = elen;
break;
default:
unknown++;
if (!show_errors)
break;
wpa_printf(MSG_MSGDUMP, "IEEE 802.11 element parse "
"ignored unknown element (id=%d elen=%d)",
id, elen);
break;
}
left -= elen;
pos += elen;
}
if (left)
return ParseFailed;
return unknown ? ParseUnknown : ParseOK;
}
int ieee802_11_ie_count(const u8 *ies, size_t ies_len)
{
int count = 0;
const u8 *pos, *end;
if (ies == NULL)
return 0;
pos = ies;
end = ies + ies_len;
while (pos + 2 <= end) {
if (pos + 2 + pos[1] > end)
break;
count++;
pos += 2 + pos[1];
}
return count;
}
struct wpabuf * ieee802_11_vendor_ie_concat(const u8 *ies, size_t ies_len,
u32 oui_type)
{
struct wpabuf *buf;
const u8 *end, *pos, *ie;
pos = ies;
end = ies + ies_len;
ie = NULL;
while (pos + 1 < end) {
if (pos + 2 + pos[1] > end)
return NULL;
if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 &&
WPA_GET_BE32(&pos[2]) == oui_type) {
ie = pos;
break;
}
pos += 2 + pos[1];
}
if (ie == NULL)
return NULL; /* No specified vendor IE found */
buf = wpabuf_alloc(ies_len);
if (buf == NULL)
return NULL;
/*
* There may be multiple vendor IEs in the message, so need to
* concatenate their data fields.
*/
while (pos + 1 < end) {
if (pos + 2 + pos[1] > end)
break;
if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 &&
WPA_GET_BE32(&pos[2]) == oui_type)
wpabuf_put_data(buf, pos + 6, pos[1] - 4);
pos += 2 + pos[1];
}
return buf;
}
const u8 * get_hdr_bssid(const struct ieee80211_hdr *hdr, size_t len)
{
u16 fc, type, stype;
/*
* PS-Poll frames are 16 bytes. All other frames are
* 24 bytes or longer.
*/
if (len < 16)
return NULL;
fc = le_to_host16(hdr->frame_control);
type = WLAN_FC_GET_TYPE(fc);
stype = WLAN_FC_GET_STYPE(fc);
switch (type) {
case WLAN_FC_TYPE_DATA:
if (len < 24)
return NULL;
switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
case WLAN_FC_FROMDS | WLAN_FC_TODS:
case WLAN_FC_TODS:
return hdr->addr1;
case WLAN_FC_FROMDS:
return hdr->addr2;
default:
return NULL;
}
case WLAN_FC_TYPE_CTRL:
if (stype != WLAN_FC_STYPE_PSPOLL)
return NULL;
return hdr->addr1;
case WLAN_FC_TYPE_MGMT:
return hdr->addr3;
default:
return NULL;
}
}
int hostapd_config_wmm_ac(struct hostapd_wmm_ac_params wmm_ac_params[],
const char *name, const char *val)
{
int num, v;
const char *pos;
struct hostapd_wmm_ac_params *ac;
/* skip 'wme_ac_' or 'wmm_ac_' prefix */
pos = name + 7;
if (os_strncmp(pos, "be_", 3) == 0) {
num = 0;
pos += 3;
} else if (os_strncmp(pos, "bk_", 3) == 0) {
num = 1;
pos += 3;
} else if (os_strncmp(pos, "vi_", 3) == 0) {
num = 2;
pos += 3;
} else if (os_strncmp(pos, "vo_", 3) == 0) {
num = 3;
pos += 3;
} else {
wpa_printf(MSG_ERROR, "Unknown WMM name '%s'", pos);
return -1;
}
ac = &wmm_ac_params[num];
if (os_strcmp(pos, "aifs") == 0) {
v = atoi(val);
if (v < 1 || v > 255) {
wpa_printf(MSG_ERROR, "Invalid AIFS value %d", v);
return -1;
}
ac->aifs = v;
} else if (os_strcmp(pos, "cwmin") == 0) {
v = atoi(val);
if (v < 0 || v > 15) {
wpa_printf(MSG_ERROR, "Invalid cwMin value %d", v);
return -1;
}
ac->cwmin = v;
} else if (os_strcmp(pos, "cwmax") == 0) {
v = atoi(val);
if (v < 0 || v > 15) {
wpa_printf(MSG_ERROR, "Invalid cwMax value %d", v);
return -1;
}
ac->cwmax = v;
} else if (os_strcmp(pos, "txop_limit") == 0) {
v = atoi(val);
if (v < 0 || v > 0xffff) {
wpa_printf(MSG_ERROR, "Invalid txop value %d", v);
return -1;
}
ac->txop_limit = v;
} else if (os_strcmp(pos, "acm") == 0) {
v = atoi(val);
if (v < 0 || v > 1) {
wpa_printf(MSG_ERROR, "Invalid acm value %d", v);
return -1;
}
ac->admission_control_mandatory = v;
} else {
wpa_printf(MSG_ERROR, "Unknown wmm_ac_ field '%s'", pos);
return -1;
}
return 0;
}
enum hostapd_hw_mode ieee80211_freq_to_chan(int freq, u8 *channel)
{
enum hostapd_hw_mode mode = NUM_HOSTAPD_MODES;
if (freq >= 2412 && freq <= 2472) {
mode = HOSTAPD_MODE_IEEE80211G;
*channel = (freq - 2407) / 5;
} else if (freq == 2484) {
mode = HOSTAPD_MODE_IEEE80211B;
*channel = 14;
} else if (freq >= 4900 && freq < 5000) {
mode = HOSTAPD_MODE_IEEE80211A;
*channel = (freq - 4000) / 5;
} else if (freq >= 5000 && freq < 5900) {
mode = HOSTAPD_MODE_IEEE80211A;
*channel = (freq - 5000) / 5;
} else if (freq >= 56160 + 2160 * 1 && freq <= 56160 + 2160 * 4) {
mode = HOSTAPD_MODE_IEEE80211AD;
*channel = (freq - 56160) / 2160;
}
return mode;
}
static const char *const us_op_class_cc[] = {
"US", "CA", NULL
};
static const char *const eu_op_class_cc[] = {
"AL", "AM", "AT", "AZ", "BA", "BE", "BG", "BY", "CH", "CY", "CZ", "DE",
"DK", "EE", "EL", "ES", "FI", "FR", "GE", "HR", "HU", "IE", "IS", "IT",
"LI", "LT", "LU", "LV", "MD", "ME", "MK", "MT", "NL", "NO", "PL", "PT",
"RO", "RS", "RU", "SE", "SI", "SK", "TR", "UA", "UK", NULL
};
static const char *const jp_op_class_cc[] = {
"JP", NULL
};
static const char *const cn_op_class_cc[] = {
"CN", NULL
};
static int country_match(const char *const cc[], const char *const country)
{
int i;
if (country == NULL)
return 0;
for (i = 0; cc[i]; i++) {
if (cc[i][0] == country[0] && cc[i][1] == country[1])
return 1;
}
return 0;
}
static int ieee80211_chan_to_freq_us(u8 op_class, u8 chan)
{
switch (op_class) {
case 12: /* channels 1..11 */
case 32: /* channels 1..7; 40 MHz */
case 33: /* channels 5..11; 40 MHz */
if (chan < 1 || chan > 11)
return -1;
return 2407 + 5 * chan;
case 1: /* channels 36,40,44,48 */
case 2: /* channels 52,56,60,64; dfs */
case 22: /* channels 36,44; 40 MHz */
case 23: /* channels 52,60; 40 MHz */
case 27: /* channels 40,48; 40 MHz */
case 28: /* channels 56,64; 40 MHz */
if (chan < 36 || chan > 64)
return -1;
return 5000 + 5 * chan;
case 4: /* channels 100-144 */
case 24: /* channels 100-140; 40 MHz */
if (chan < 100 || chan > 144)
return -1;
return 5000 + 5 * chan;
case 3: /* channels 149,153,157,161 */
case 25: /* channels 149,157; 40 MHz */
case 26: /* channels 149,157; 40 MHz */
case 30: /* channels 153,161; 40 MHz */
case 31: /* channels 153,161; 40 MHz */
if (chan < 149 || chan > 161)
return -1;
return 5000 + 5 * chan;
case 5: /* channels 149,153,157,161,165 */
if (chan < 149 || chan > 165)
return -1;
return 5000 + 5 * chan;
case 34: /* 60 GHz band, channels 1..3 */
if (chan < 1 || chan > 3)
return -1;
return 56160 + 2160 * chan;
}
return -1;
}
static int ieee80211_chan_to_freq_eu(u8 op_class, u8 chan)
{
switch (op_class) {
case 4: /* channels 1..13 */
case 11: /* channels 1..9; 40 MHz */
case 12: /* channels 5..13; 40 MHz */
if (chan < 1 || chan > 13)
return -1;
return 2407 + 5 * chan;
case 1: /* channels 36,40,44,48 */
case 2: /* channels 52,56,60,64; dfs */
case 5: /* channels 36,44; 40 MHz */
case 6: /* channels 52,60; 40 MHz */
case 8: /* channels 40,48; 40 MHz */
case 9: /* channels 56,64; 40 MHz */
if (chan < 36 || chan > 64)
return -1;
return 5000 + 5 * chan;
case 3: /* channels 100-140 */
case 7: /* channels 100-132; 40 MHz */
case 10: /* channels 104-136; 40 MHz */
case 16: /* channels 100-140 */
if (chan < 100 || chan > 140)
return -1;
return 5000 + 5 * chan;
case 17: /* channels 149,153,157,161,165,169 */
if (chan < 149 || chan > 169)
return -1;
return 5000 + 5 * chan;
case 18: /* 60 GHz band, channels 1..4 */
if (chan < 1 || chan > 4)
return -1;
return 56160 + 2160 * chan;
}
return -1;
}
static int ieee80211_chan_to_freq_jp(u8 op_class, u8 chan)
{
switch (op_class) {
case 30: /* channels 1..13 */
case 56: /* channels 1..9; 40 MHz */
case 57: /* channels 5..13; 40 MHz */
if (chan < 1 || chan > 13)
return -1;
return 2407 + 5 * chan;
case 31: /* channel 14 */
if (chan != 14)
return -1;
return 2414 + 5 * chan;
case 1: /* channels 34,38,42,46(old) or 36,40,44,48 */
case 32: /* channels 52,56,60,64 */
case 33: /* channels 52,56,60,64 */
case 36: /* channels 36,44; 40 MHz */
case 37: /* channels 52,60; 40 MHz */
case 38: /* channels 52,60; 40 MHz */
case 41: /* channels 40,48; 40 MHz */
case 42: /* channels 56,64; 40 MHz */
case 43: /* channels 56,64; 40 MHz */
if (chan < 34 || chan > 64)
return -1;
return 5000 + 5 * chan;
case 34: /* channels 100-140 */
case 35: /* channels 100-140 */
case 39: /* channels 100-132; 40 MHz */
case 40: /* channels 100-132; 40 MHz */
case 44: /* channels 104-136; 40 MHz */
case 45: /* channels 104-136; 40 MHz */
case 58: /* channels 100-140 */
if (chan < 100 || chan > 140)
return -1;
return 5000 + 5 * chan;
case 59: /* 60 GHz band, channels 1..4 */
if (chan < 1 || chan > 3)
return -1;
return 56160 + 2160 * chan;
}
return -1;
}
static int ieee80211_chan_to_freq_cn(u8 op_class, u8 chan)
{
switch (op_class) {
case 7: /* channels 1..13 */
case 8: /* channels 1..9; 40 MHz */
case 9: /* channels 5..13; 40 MHz */
if (chan < 1 || chan > 13)
return -1;
return 2407 + 5 * chan;
case 1: /* channels 36,40,44,48 */
case 2: /* channels 52,56,60,64; dfs */
case 4: /* channels 36,44; 40 MHz */
case 5: /* channels 52,60; 40 MHz */
if (chan < 36 || chan > 64)
return -1;
return 5000 + 5 * chan;
case 3: /* channels 149,153,157,161,165 */
case 6: /* channels 149,157; 40 MHz */
if (chan < 149 || chan > 165)
return -1;
return 5000 + 5 * chan;
}
return -1;
}
static int ieee80211_chan_to_freq_global(u8 op_class, u8 chan)
{
/* Table E-4 in IEEE Std 802.11-2012 - Global operating classes */
switch (op_class) {
case 81:
/* channels 1..13 */
if (chan < 1 || chan > 13)
return -1;
return 2407 + 5 * chan;
case 82:
/* channel 14 */
if (chan != 14)
return -1;
return 2414 + 5 * chan;
case 83: /* channels 1..9; 40 MHz */
case 84: /* channels 5..13; 40 MHz */
if (chan < 1 || chan > 13)
return -1;
return 2407 + 5 * chan;
case 115: /* channels 36,40,44,48; indoor only */
case 116: /* channels 36,44; 40 MHz; indoor only */
case 117: /* channels 40,48; 40 MHz; indoor only */
case 118: /* channels 52,56,60,64; dfs */
case 119: /* channels 52,60; 40 MHz; dfs */
case 120: /* channels 56,64; 40 MHz; dfs */
if (chan < 36 || chan > 64)
return -1;
return 5000 + 5 * chan;
case 121: /* channels 100-140 */
case 122: /* channels 100-142; 40 MHz */
case 123: /* channels 104-136; 40 MHz */
if (chan < 100 || chan > 140)
return -1;
return 5000 + 5 * chan;
case 124: /* channels 149,153,157,161 */
case 126: /* channels 149,157; 40 MHz */
case 127: /* channels 153,161; 40 MHz */
if (chan < 149 || chan > 161)
return -1;
return 5000 + 5 * chan;
case 125: /* channels 149,153,157,161,165,169 */
if (chan < 149 || chan > 169)
return -1;
return 5000 + 5 * chan;
case 128: /* center freqs 42, 58, 106, 122, 138, 155; 80 MHz */
case 130: /* center freqs 42, 58, 106, 122, 138, 155; 80 MHz */
if (chan < 36 || chan > 161)
return -1;
return 5000 + 5 * chan;
case 129: /* center freqs 50, 114; 160 MHz */
if (chan < 50 || chan > 114)
return -1;
return 5000 + 5 * chan;
case 180: /* 60 GHz band, channels 1..4 */
if (chan < 1 || chan > 4)
return -1;
return 56160 + 2160 * chan;
}
return -1;
}
/**
* ieee80211_chan_to_freq - Convert channel info to frequency
* @country: Country code, if known; otherwise, global operating class is used
* @op_class: Operating class
* @chan: Channel number
* Returns: Frequency in MHz or -1 if the specified channel is unknown
*/
int ieee80211_chan_to_freq(const char *country, u8 op_class, u8 chan)
{
int freq;
if (country_match(us_op_class_cc, country)) {
freq = ieee80211_chan_to_freq_us(op_class, chan);
if (freq > 0)
return freq;
}
if (country_match(eu_op_class_cc, country)) {
freq = ieee80211_chan_to_freq_eu(op_class, chan);
if (freq > 0)
return freq;
}
if (country_match(jp_op_class_cc, country)) {
freq = ieee80211_chan_to_freq_jp(op_class, chan);
if (freq > 0)
return freq;
}
if (country_match(cn_op_class_cc, country)) {
freq = ieee80211_chan_to_freq_cn(op_class, chan);
if (freq > 0)
return freq;
}
return ieee80211_chan_to_freq_global(op_class, chan);
}
int ieee80211_is_dfs(int freq)
{
/* TODO: this could be more accurate to better cover all domains */
return (freq >= 5260 && freq <= 5320) || (freq >= 5500 && freq <= 5700);
}
static int is_11b(u8 rate)
{
return rate == 0x02 || rate == 0x04 || rate == 0x0b || rate == 0x16;
}
int supp_rates_11b_only(struct ieee802_11_elems *elems)
{
int num_11b = 0, num_others = 0;
int i;
if (elems->supp_rates == NULL && elems->ext_supp_rates == NULL)
return 0;
for (i = 0; elems->supp_rates && i < elems->supp_rates_len; i++) {
if (is_11b(elems->supp_rates[i]))
num_11b++;
else
num_others++;
}
for (i = 0; elems->ext_supp_rates && i < elems->ext_supp_rates_len;
i++) {
if (is_11b(elems->ext_supp_rates[i]))
num_11b++;
else
num_others++;
}
return num_11b > 0 && num_others == 0;
}
const char * fc2str(u16 fc)
{
u16 stype = WLAN_FC_GET_STYPE(fc);
#define C2S(x) case x: return #x;
switch (WLAN_FC_GET_TYPE(fc)) {
case WLAN_FC_TYPE_MGMT:
switch (stype) {
C2S(WLAN_FC_STYPE_ASSOC_REQ)
C2S(WLAN_FC_STYPE_ASSOC_RESP)
C2S(WLAN_FC_STYPE_REASSOC_REQ)
C2S(WLAN_FC_STYPE_REASSOC_RESP)
C2S(WLAN_FC_STYPE_PROBE_REQ)
C2S(WLAN_FC_STYPE_PROBE_RESP)
C2S(WLAN_FC_STYPE_BEACON)
C2S(WLAN_FC_STYPE_ATIM)
C2S(WLAN_FC_STYPE_DISASSOC)
C2S(WLAN_FC_STYPE_AUTH)
C2S(WLAN_FC_STYPE_DEAUTH)
C2S(WLAN_FC_STYPE_ACTION)
}
break;
case WLAN_FC_TYPE_CTRL:
switch (stype) {
C2S(WLAN_FC_STYPE_PSPOLL)
C2S(WLAN_FC_STYPE_RTS)
C2S(WLAN_FC_STYPE_CTS)
C2S(WLAN_FC_STYPE_ACK)
C2S(WLAN_FC_STYPE_CFEND)
C2S(WLAN_FC_STYPE_CFENDACK)
}
break;
case WLAN_FC_TYPE_DATA:
switch (stype) {
C2S(WLAN_FC_STYPE_DATA)
C2S(WLAN_FC_STYPE_DATA_CFACK)
C2S(WLAN_FC_STYPE_DATA_CFPOLL)
C2S(WLAN_FC_STYPE_DATA_CFACKPOLL)
C2S(WLAN_FC_STYPE_NULLFUNC)
C2S(WLAN_FC_STYPE_CFACK)
C2S(WLAN_FC_STYPE_CFPOLL)
C2S(WLAN_FC_STYPE_CFACKPOLL)
C2S(WLAN_FC_STYPE_QOS_DATA)
C2S(WLAN_FC_STYPE_QOS_DATA_CFACK)
C2S(WLAN_FC_STYPE_QOS_DATA_CFPOLL)
C2S(WLAN_FC_STYPE_QOS_DATA_CFACKPOLL)
C2S(WLAN_FC_STYPE_QOS_NULL)
C2S(WLAN_FC_STYPE_QOS_CFPOLL)
C2S(WLAN_FC_STYPE_QOS_CFACKPOLL)
}
break;
}
return "WLAN_FC_TYPE_UNKNOWN";
#undef C2S
}