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fragattacks/wpa_supplicant/config.c
Johannes Berg 0d7e5a3a29 Allow AP mode to disconnect STAs based on low ACK condition 
The nl80211 driver can report low ACK condition (in fact it reports
complete loss right now only). Use that, along with a config option, to
disconnect stations when the data connection is not working properly,
e.g., due to the STA having went outside the range of the AP. This is
disabled by default and can be enabled with disassoc_low_ack=1 in
hostapd or wpa_supplicant configuration file.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2010-12-28 17:15:01 +02:00

2455 lines
58 KiB
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/*
* WPA Supplicant / Configuration parser and common functions
* Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#include "includes.h"
#include "common.h"
#include "utils/uuid.h"
#include "crypto/sha1.h"
#include "rsn_supp/wpa.h"
#include "eap_peer/eap.h"
#include "config.h"
#if !defined(CONFIG_CTRL_IFACE) && defined(CONFIG_NO_CONFIG_WRITE)
#define NO_CONFIG_WRITE
#endif
/*
* Structure for network configuration parsing. This data is used to implement
* a generic parser for each network block variable. The table of configuration
* variables is defined below in this file (ssid_fields[]).
*/
struct parse_data {
/* Configuration variable name */
char *name;
/* Parser function for this variable */
int (*parser)(const struct parse_data *data, struct wpa_ssid *ssid,
int line, const char *value);
#ifndef NO_CONFIG_WRITE
/* Writer function (i.e., to get the variable in text format from
* internal presentation). */
char * (*writer)(const struct parse_data *data, struct wpa_ssid *ssid);
#endif /* NO_CONFIG_WRITE */
/* Variable specific parameters for the parser. */
void *param1, *param2, *param3, *param4;
/* 0 = this variable can be included in debug output and ctrl_iface
* 1 = this variable contains key/private data and it must not be
* included in debug output unless explicitly requested. In
* addition, this variable will not be readable through the
* ctrl_iface.
*/
int key_data;
};
static char * wpa_config_parse_string(const char *value, size_t *len)
{
if (*value == '"') {
const char *pos;
char *str;
value++;
pos = os_strrchr(value, '"');
if (pos == NULL || pos[1] != '\0')
return NULL;
*len = pos - value;
str = os_malloc(*len + 1);
if (str == NULL)
return NULL;
os_memcpy(str, value, *len);
str[*len] = '\0';
return str;
} else {
u8 *str;
size_t tlen, hlen = os_strlen(value);
if (hlen & 1)
return NULL;
tlen = hlen / 2;
str = os_malloc(tlen + 1);
if (str == NULL)
return NULL;
if (hexstr2bin(value, str, tlen)) {
os_free(str);
return NULL;
}
str[tlen] = '\0';
*len = tlen;
return (char *) str;
}
}
static int wpa_config_parse_str(const struct parse_data *data,
struct wpa_ssid *ssid,
int line, const char *value)
{
size_t res_len, *dst_len;
char **dst, *tmp;
if (os_strcmp(value, "NULL") == 0) {
wpa_printf(MSG_DEBUG, "Unset configuration string '%s'",
data->name);
tmp = NULL;
res_len = 0;
goto set;
}
tmp = wpa_config_parse_string(value, &res_len);
if (tmp == NULL) {
wpa_printf(MSG_ERROR, "Line %d: failed to parse %s '%s'.",
line, data->name,
data->key_data ? "[KEY DATA REMOVED]" : value);
return -1;
}
if (data->key_data) {
wpa_hexdump_ascii_key(MSG_MSGDUMP, data->name,
(u8 *) tmp, res_len);
} else {
wpa_hexdump_ascii(MSG_MSGDUMP, data->name,
(u8 *) tmp, res_len);
}
if (data->param3 && res_len < (size_t) data->param3) {
wpa_printf(MSG_ERROR, "Line %d: too short %s (len=%lu "
"min_len=%ld)", line, data->name,
(unsigned long) res_len, (long) data->param3);
os_free(tmp);
return -1;
}
if (data->param4 && res_len > (size_t) data->param4) {
wpa_printf(MSG_ERROR, "Line %d: too long %s (len=%lu "
"max_len=%ld)", line, data->name,
(unsigned long) res_len, (long) data->param4);
os_free(tmp);
return -1;
}
set:
dst = (char **) (((u8 *) ssid) + (long) data->param1);
dst_len = (size_t *) (((u8 *) ssid) + (long) data->param2);
os_free(*dst);
*dst = tmp;
if (data->param2)
*dst_len = res_len;
return 0;
}
#ifndef NO_CONFIG_WRITE
static int is_hex(const u8 *data, size_t len)
{
size_t i;
for (i = 0; i < len; i++) {
if (data[i] < 32 || data[i] >= 127)
return 1;
}
return 0;
}
static char * wpa_config_write_string_ascii(const u8 *value, size_t len)
{
char *buf;
buf = os_malloc(len + 3);
if (buf == NULL)
return NULL;
buf[0] = '"';
os_memcpy(buf + 1, value, len);
buf[len + 1] = '"';
buf[len + 2] = '\0';
return buf;
}
static char * wpa_config_write_string_hex(const u8 *value, size_t len)
{
char *buf;
buf = os_zalloc(2 * len + 1);
if (buf == NULL)
return NULL;
wpa_snprintf_hex(buf, 2 * len + 1, value, len);
return buf;
}
static char * wpa_config_write_string(const u8 *value, size_t len)
{
if (value == NULL)
return NULL;
if (is_hex(value, len))
return wpa_config_write_string_hex(value, len);
else
return wpa_config_write_string_ascii(value, len);
}
static char * wpa_config_write_str(const struct parse_data *data,
struct wpa_ssid *ssid)
{
size_t len;
char **src;
src = (char **) (((u8 *) ssid) + (long) data->param1);
if (*src == NULL)
return NULL;
if (data->param2)
len = *((size_t *) (((u8 *) ssid) + (long) data->param2));
else
len = os_strlen(*src);
return wpa_config_write_string((const u8 *) *src, len);
}
#endif /* NO_CONFIG_WRITE */
static int wpa_config_parse_int(const struct parse_data *data,
struct wpa_ssid *ssid,
int line, const char *value)
{
int *dst;
dst = (int *) (((u8 *) ssid) + (long) data->param1);
*dst = atoi(value);
wpa_printf(MSG_MSGDUMP, "%s=%d (0x%x)", data->name, *dst, *dst);
if (data->param3 && *dst < (long) data->param3) {
wpa_printf(MSG_ERROR, "Line %d: too small %s (value=%d "
"min_value=%ld)", line, data->name, *dst,
(long) data->param3);
*dst = (long) data->param3;
return -1;
}
if (data->param4 && *dst > (long) data->param4) {
wpa_printf(MSG_ERROR, "Line %d: too large %s (value=%d "
"max_value=%ld)", line, data->name, *dst,
(long) data->param4);
*dst = (long) data->param4;
return -1;
}
return 0;
}
#ifndef NO_CONFIG_WRITE
static char * wpa_config_write_int(const struct parse_data *data,
struct wpa_ssid *ssid)
{
int *src, res;
char *value;
src = (int *) (((u8 *) ssid) + (long) data->param1);
value = os_malloc(20);
if (value == NULL)
return NULL;
res = os_snprintf(value, 20, "%d", *src);
if (res < 0 || res >= 20) {
os_free(value);
return NULL;
}
value[20 - 1] = '\0';
return value;
}
#endif /* NO_CONFIG_WRITE */
static int wpa_config_parse_bssid(const struct parse_data *data,
struct wpa_ssid *ssid, int line,
const char *value)
{
if (value[0] == '\0' || os_strcmp(value, "\"\"") == 0 ||
os_strcmp(value, "any") == 0) {
ssid->bssid_set = 0;
wpa_printf(MSG_MSGDUMP, "BSSID any");
return 0;
}
if (hwaddr_aton(value, ssid->bssid)) {
wpa_printf(MSG_ERROR, "Line %d: Invalid BSSID '%s'.",
line, value);
return -1;
}
ssid->bssid_set = 1;
wpa_hexdump(MSG_MSGDUMP, "BSSID", ssid->bssid, ETH_ALEN);
return 0;
}
#ifndef NO_CONFIG_WRITE
static char * wpa_config_write_bssid(const struct parse_data *data,
struct wpa_ssid *ssid)
{
char *value;
int res;
if (!ssid->bssid_set)
return NULL;
value = os_malloc(20);
if (value == NULL)
return NULL;
res = os_snprintf(value, 20, MACSTR, MAC2STR(ssid->bssid));
if (res < 0 || res >= 20) {
os_free(value);
return NULL;
}
value[20 - 1] = '\0';
return value;
}
#endif /* NO_CONFIG_WRITE */
static int wpa_config_parse_psk(const struct parse_data *data,
struct wpa_ssid *ssid, int line,
const char *value)
{
if (*value == '"') {
#ifndef CONFIG_NO_PBKDF2
const char *pos;
size_t len;
value++;
pos = os_strrchr(value, '"');
if (pos)
len = pos - value;
else
len = os_strlen(value);
if (len < 8 || len > 63) {
wpa_printf(MSG_ERROR, "Line %d: Invalid passphrase "
"length %lu (expected: 8..63) '%s'.",
line, (unsigned long) len, value);
return -1;
}
wpa_hexdump_ascii_key(MSG_MSGDUMP, "PSK (ASCII passphrase)",
(u8 *) value, len);
if (ssid->passphrase && os_strlen(ssid->passphrase) == len &&
os_memcmp(ssid->passphrase, value, len) == 0)
return 0;
ssid->psk_set = 0;
os_free(ssid->passphrase);
ssid->passphrase = os_malloc(len + 1);
if (ssid->passphrase == NULL)
return -1;
os_memcpy(ssid->passphrase, value, len);
ssid->passphrase[len] = '\0';
return 0;
#else /* CONFIG_NO_PBKDF2 */
wpa_printf(MSG_ERROR, "Line %d: ASCII passphrase not "
"supported.", line);
return -1;
#endif /* CONFIG_NO_PBKDF2 */
}
if (hexstr2bin(value, ssid->psk, PMK_LEN) ||
value[PMK_LEN * 2] != '\0') {
wpa_printf(MSG_ERROR, "Line %d: Invalid PSK '%s'.",
line, value);
return -1;
}
os_free(ssid->passphrase);
ssid->passphrase = NULL;
ssid->psk_set = 1;
wpa_hexdump_key(MSG_MSGDUMP, "PSK", ssid->psk, PMK_LEN);
return 0;
}
#ifndef NO_CONFIG_WRITE
static char * wpa_config_write_psk(const struct parse_data *data,
struct wpa_ssid *ssid)
{
if (ssid->passphrase)
return wpa_config_write_string_ascii(
(const u8 *) ssid->passphrase,
os_strlen(ssid->passphrase));
if (ssid->psk_set)
return wpa_config_write_string_hex(ssid->psk, PMK_LEN);
return NULL;
}
#endif /* NO_CONFIG_WRITE */
static int wpa_config_parse_proto(const struct parse_data *data,
struct wpa_ssid *ssid, int line,
const char *value)
{
int val = 0, last, errors = 0;
char *start, *end, *buf;
buf = os_strdup(value);
if (buf == NULL)
return -1;
start = buf;
while (*start != '\0') {
while (*start == ' ' || *start == '\t')
start++;
if (*start == '\0')
break;
end = start;
while (*end != ' ' && *end != '\t' && *end != '\0')
end++;
last = *end == '\0';
*end = '\0';
if (os_strcmp(start, "WPA") == 0)
val |= WPA_PROTO_WPA;
else if (os_strcmp(start, "RSN") == 0 ||
os_strcmp(start, "WPA2") == 0)
val |= WPA_PROTO_RSN;
else {
wpa_printf(MSG_ERROR, "Line %d: invalid proto '%s'",
line, start);
errors++;
}
if (last)
break;
start = end + 1;
}
os_free(buf);
if (val == 0) {
wpa_printf(MSG_ERROR,
"Line %d: no proto values configured.", line);
errors++;
}
wpa_printf(MSG_MSGDUMP, "proto: 0x%x", val);
ssid->proto = val;
return errors ? -1 : 0;
}
#ifndef NO_CONFIG_WRITE
static char * wpa_config_write_proto(const struct parse_data *data,
struct wpa_ssid *ssid)
{
int first = 1, ret;
char *buf, *pos, *end;
pos = buf = os_zalloc(10);
if (buf == NULL)
return NULL;
end = buf + 10;
if (ssid->proto & WPA_PROTO_WPA) {
ret = os_snprintf(pos, end - pos, "%sWPA", first ? "" : " ");
if (ret < 0 || ret >= end - pos)
return buf;
pos += ret;
first = 0;
}
if (ssid->proto & WPA_PROTO_RSN) {
ret = os_snprintf(pos, end - pos, "%sRSN", first ? "" : " ");
if (ret < 0 || ret >= end - pos)
return buf;
pos += ret;
first = 0;
}
return buf;
}
#endif /* NO_CONFIG_WRITE */
static int wpa_config_parse_key_mgmt(const struct parse_data *data,
struct wpa_ssid *ssid, int line,
const char *value)
{
int val = 0, last, errors = 0;
char *start, *end, *buf;
buf = os_strdup(value);
if (buf == NULL)
return -1;
start = buf;
while (*start != '\0') {
while (*start == ' ' || *start == '\t')
start++;
if (*start == '\0')
break;
end = start;
while (*end != ' ' && *end != '\t' && *end != '\0')
end++;
last = *end == '\0';
*end = '\0';
if (os_strcmp(start, "WPA-PSK") == 0)
val |= WPA_KEY_MGMT_PSK;
else if (os_strcmp(start, "WPA-EAP") == 0)
val |= WPA_KEY_MGMT_IEEE8021X;
else if (os_strcmp(start, "IEEE8021X") == 0)
val |= WPA_KEY_MGMT_IEEE8021X_NO_WPA;
else if (os_strcmp(start, "NONE") == 0)
val |= WPA_KEY_MGMT_NONE;
else if (os_strcmp(start, "WPA-NONE") == 0)
val |= WPA_KEY_MGMT_WPA_NONE;
#ifdef CONFIG_IEEE80211R
else if (os_strcmp(start, "FT-PSK") == 0)
val |= WPA_KEY_MGMT_FT_PSK;
else if (os_strcmp(start, "FT-EAP") == 0)
val |= WPA_KEY_MGMT_FT_IEEE8021X;
#endif /* CONFIG_IEEE80211R */
#ifdef CONFIG_IEEE80211W
else if (os_strcmp(start, "WPA-PSK-SHA256") == 0)
val |= WPA_KEY_MGMT_PSK_SHA256;
else if (os_strcmp(start, "WPA-EAP-SHA256") == 0)
val |= WPA_KEY_MGMT_IEEE8021X_SHA256;
#endif /* CONFIG_IEEE80211W */
#ifdef CONFIG_WPS
else if (os_strcmp(start, "WPS") == 0)
val |= WPA_KEY_MGMT_WPS;
#endif /* CONFIG_WPS */
else {
wpa_printf(MSG_ERROR, "Line %d: invalid key_mgmt '%s'",
line, start);
errors++;
}
if (last)
break;
start = end + 1;
}
os_free(buf);
if (val == 0) {
wpa_printf(MSG_ERROR,
"Line %d: no key_mgmt values configured.", line);
errors++;
}
wpa_printf(MSG_MSGDUMP, "key_mgmt: 0x%x", val);
ssid->key_mgmt = val;
return errors ? -1 : 0;
}
#ifndef NO_CONFIG_WRITE
static char * wpa_config_write_key_mgmt(const struct parse_data *data,
struct wpa_ssid *ssid)
{
char *buf, *pos, *end;
int ret;
pos = buf = os_zalloc(50);
if (buf == NULL)
return NULL;
end = buf + 50;
if (ssid->key_mgmt & WPA_KEY_MGMT_PSK) {
ret = os_snprintf(pos, end - pos, "%sWPA-PSK",
pos == buf ? "" : " ");
if (ret < 0 || ret >= end - pos) {
end[-1] = '\0';
return buf;
}
pos += ret;
}
if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X) {
ret = os_snprintf(pos, end - pos, "%sWPA-EAP",
pos == buf ? "" : " ");
if (ret < 0 || ret >= end - pos) {
end[-1] = '\0';
return buf;
}
pos += ret;
}
if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
ret = os_snprintf(pos, end - pos, "%sIEEE8021X",
pos == buf ? "" : " ");
if (ret < 0 || ret >= end - pos) {
end[-1] = '\0';
return buf;
}
pos += ret;
}
if (ssid->key_mgmt & WPA_KEY_MGMT_NONE) {
ret = os_snprintf(pos, end - pos, "%sNONE",
pos == buf ? "" : " ");
if (ret < 0 || ret >= end - pos) {
end[-1] = '\0';
return buf;
}
pos += ret;
}
if (ssid->key_mgmt & WPA_KEY_MGMT_WPA_NONE) {
ret = os_snprintf(pos, end - pos, "%sWPA-NONE",
pos == buf ? "" : " ");
if (ret < 0 || ret >= end - pos) {
end[-1] = '\0';
return buf;
}
pos += ret;
}
#ifdef CONFIG_IEEE80211R
if (ssid->key_mgmt & WPA_KEY_MGMT_FT_PSK)
pos += os_snprintf(pos, end - pos, "%sFT-PSK",
pos == buf ? "" : " ");
if (ssid->key_mgmt & WPA_KEY_MGMT_FT_IEEE8021X)
pos += os_snprintf(pos, end - pos, "%sFT-EAP",
pos == buf ? "" : " ");
#endif /* CONFIG_IEEE80211R */
#ifdef CONFIG_IEEE80211W
if (ssid->key_mgmt & WPA_KEY_MGMT_PSK_SHA256)
pos += os_snprintf(pos, end - pos, "%sWPA-PSK-SHA256",
pos == buf ? "" : " ");
if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_SHA256)
pos += os_snprintf(pos, end - pos, "%sWPA-EAP-SHA256",
pos == buf ? "" : " ");
#endif /* CONFIG_IEEE80211W */
#ifdef CONFIG_WPS
if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
pos += os_snprintf(pos, end - pos, "%sWPS",
pos == buf ? "" : " ");
#endif /* CONFIG_WPS */
return buf;
}
#endif /* NO_CONFIG_WRITE */
static int wpa_config_parse_cipher(int line, const char *value)
{
int val = 0, last;
char *start, *end, *buf;
buf = os_strdup(value);
if (buf == NULL)
return -1;
start = buf;
while (*start != '\0') {
while (*start == ' ' || *start == '\t')
start++;
if (*start == '\0')
break;
end = start;
while (*end != ' ' && *end != '\t' && *end != '\0')
end++;
last = *end == '\0';
*end = '\0';
if (os_strcmp(start, "CCMP") == 0)
val |= WPA_CIPHER_CCMP;
else if (os_strcmp(start, "TKIP") == 0)
val |= WPA_CIPHER_TKIP;
else if (os_strcmp(start, "WEP104") == 0)
val |= WPA_CIPHER_WEP104;
else if (os_strcmp(start, "WEP40") == 0)
val |= WPA_CIPHER_WEP40;
else if (os_strcmp(start, "NONE") == 0)
val |= WPA_CIPHER_NONE;
else {
wpa_printf(MSG_ERROR, "Line %d: invalid cipher '%s'.",
line, start);
os_free(buf);
return -1;
}
if (last)
break;
start = end + 1;
}
os_free(buf);
if (val == 0) {
wpa_printf(MSG_ERROR, "Line %d: no cipher values configured.",
line);
return -1;
}
return val;
}
#ifndef NO_CONFIG_WRITE
static char * wpa_config_write_cipher(int cipher)
{
char *buf, *pos, *end;
int ret;
pos = buf = os_zalloc(50);
if (buf == NULL)
return NULL;
end = buf + 50;
if (cipher & WPA_CIPHER_CCMP) {
ret = os_snprintf(pos, end - pos, "%sCCMP",
pos == buf ? "" : " ");
if (ret < 0 || ret >= end - pos) {
end[-1] = '\0';
return buf;
}
pos += ret;
}
if (cipher & WPA_CIPHER_TKIP) {
ret = os_snprintf(pos, end - pos, "%sTKIP",
pos == buf ? "" : " ");
if (ret < 0 || ret >= end - pos) {
end[-1] = '\0';
return buf;
}
pos += ret;
}
if (cipher & WPA_CIPHER_WEP104) {
ret = os_snprintf(pos, end - pos, "%sWEP104",
pos == buf ? "" : " ");
if (ret < 0 || ret >= end - pos) {
end[-1] = '\0';
return buf;
}
pos += ret;
}
if (cipher & WPA_CIPHER_WEP40) {
ret = os_snprintf(pos, end - pos, "%sWEP40",
pos == buf ? "" : " ");
if (ret < 0 || ret >= end - pos) {
end[-1] = '\0';
return buf;
}
pos += ret;
}
if (cipher & WPA_CIPHER_NONE) {
ret = os_snprintf(pos, end - pos, "%sNONE",
pos == buf ? "" : " ");
if (ret < 0 || ret >= end - pos) {
end[-1] = '\0';
return buf;
}
pos += ret;
}
return buf;
}
#endif /* NO_CONFIG_WRITE */
static int wpa_config_parse_pairwise(const struct parse_data *data,
struct wpa_ssid *ssid, int line,
const char *value)
{
int val;
val = wpa_config_parse_cipher(line, value);
if (val == -1)
return -1;
if (val & ~(WPA_CIPHER_CCMP | WPA_CIPHER_TKIP | WPA_CIPHER_NONE)) {
wpa_printf(MSG_ERROR, "Line %d: not allowed pairwise cipher "
"(0x%x).", line, val);
return -1;
}
wpa_printf(MSG_MSGDUMP, "pairwise: 0x%x", val);
ssid->pairwise_cipher = val;
return 0;
}
#ifndef NO_CONFIG_WRITE
static char * wpa_config_write_pairwise(const struct parse_data *data,
struct wpa_ssid *ssid)
{
return wpa_config_write_cipher(ssid->pairwise_cipher);
}
#endif /* NO_CONFIG_WRITE */
static int wpa_config_parse_group(const struct parse_data *data,
struct wpa_ssid *ssid, int line,
const char *value)
{
int val;
val = wpa_config_parse_cipher(line, value);
if (val == -1)
return -1;
if (val & ~(WPA_CIPHER_CCMP | WPA_CIPHER_TKIP | WPA_CIPHER_WEP104 |
WPA_CIPHER_WEP40)) {
wpa_printf(MSG_ERROR, "Line %d: not allowed group cipher "
"(0x%x).", line, val);
return -1;
}
wpa_printf(MSG_MSGDUMP, "group: 0x%x", val);
ssid->group_cipher = val;
return 0;
}
#ifndef NO_CONFIG_WRITE
static char * wpa_config_write_group(const struct parse_data *data,
struct wpa_ssid *ssid)
{
return wpa_config_write_cipher(ssid->group_cipher);
}
#endif /* NO_CONFIG_WRITE */
static int wpa_config_parse_auth_alg(const struct parse_data *data,
struct wpa_ssid *ssid, int line,
const char *value)
{
int val = 0, last, errors = 0;
char *start, *end, *buf;
buf = os_strdup(value);
if (buf == NULL)
return -1;
start = buf;
while (*start != '\0') {
while (*start == ' ' || *start == '\t')
start++;
if (*start == '\0')
break;
end = start;
while (*end != ' ' && *end != '\t' && *end != '\0')
end++;
last = *end == '\0';
*end = '\0';
if (os_strcmp(start, "OPEN") == 0)
val |= WPA_AUTH_ALG_OPEN;
else if (os_strcmp(start, "SHARED") == 0)
val |= WPA_AUTH_ALG_SHARED;
else if (os_strcmp(start, "LEAP") == 0)
val |= WPA_AUTH_ALG_LEAP;
else {
wpa_printf(MSG_ERROR, "Line %d: invalid auth_alg '%s'",
line, start);
errors++;
}
if (last)
break;
start = end + 1;
}
os_free(buf);
if (val == 0) {
wpa_printf(MSG_ERROR,
"Line %d: no auth_alg values configured.", line);
errors++;
}
wpa_printf(MSG_MSGDUMP, "auth_alg: 0x%x", val);
ssid->auth_alg = val;
return errors ? -1 : 0;
}
#ifndef NO_CONFIG_WRITE
static char * wpa_config_write_auth_alg(const struct parse_data *data,
struct wpa_ssid *ssid)
{
char *buf, *pos, *end;
int ret;
pos = buf = os_zalloc(30);
if (buf == NULL)
return NULL;
end = buf + 30;
if (ssid->auth_alg & WPA_AUTH_ALG_OPEN) {
ret = os_snprintf(pos, end - pos, "%sOPEN",
pos == buf ? "" : " ");
if (ret < 0 || ret >= end - pos) {
end[-1] = '\0';
return buf;
}
pos += ret;
}
if (ssid->auth_alg & WPA_AUTH_ALG_SHARED) {
ret = os_snprintf(pos, end - pos, "%sSHARED",
pos == buf ? "" : " ");
if (ret < 0 || ret >= end - pos) {
end[-1] = '\0';
return buf;
}
pos += ret;
}
if (ssid->auth_alg & WPA_AUTH_ALG_LEAP) {
ret = os_snprintf(pos, end - pos, "%sLEAP",
pos == buf ? "" : " ");
if (ret < 0 || ret >= end - pos) {
end[-1] = '\0';
return buf;
}
pos += ret;
}
return buf;
}
#endif /* NO_CONFIG_WRITE */
static int * wpa_config_parse_freqs(const struct parse_data *data,
struct wpa_ssid *ssid, int line,
const char *value)
{
int *freqs;
size_t used, len;
const char *pos;
used = 0;
len = 10;
freqs = os_zalloc((len + 1) * sizeof(int));
if (freqs == NULL)
return NULL;
pos = value;
while (pos) {
while (*pos == ' ')
pos++;
if (used == len) {
int *n;
size_t i;
n = os_realloc(freqs, (len * 2 + 1) * sizeof(int));
if (n == NULL) {
os_free(freqs);
return NULL;
}
for (i = len; i <= len * 2; i++)
n[i] = 0;
freqs = n;
len *= 2;
}
freqs[used] = atoi(pos);
if (freqs[used] == 0)
break;
used++;
pos = os_strchr(pos + 1, ' ');
}
return freqs;
}
static int wpa_config_parse_scan_freq(const struct parse_data *data,
struct wpa_ssid *ssid, int line,
const char *value)
{
int *freqs;
freqs = wpa_config_parse_freqs(data, ssid, line, value);
if (freqs == NULL)
return -1;
os_free(ssid->scan_freq);
ssid->scan_freq = freqs;
return 0;
}
static int wpa_config_parse_freq_list(const struct parse_data *data,
struct wpa_ssid *ssid, int line,
const char *value)
{
int *freqs;
freqs = wpa_config_parse_freqs(data, ssid, line, value);
if (freqs == NULL)
return -1;
os_free(ssid->freq_list);
ssid->freq_list = freqs;
return 0;
}
#ifndef NO_CONFIG_WRITE
static char * wpa_config_write_freqs(const struct parse_data *data,
const int *freqs)
{
char *buf, *pos, *end;
int i, ret;
size_t count;
if (freqs == NULL)
return NULL;
count = 0;
for (i = 0; freqs[i]; i++)
count++;
pos = buf = os_zalloc(10 * count + 1);
if (buf == NULL)
return NULL;
end = buf + 10 * count + 1;
for (i = 0; freqs[i]; i++) {
ret = os_snprintf(pos, end - pos, "%s%u",
i == 0 ? "" : " ", freqs[i]);
if (ret < 0 || ret >= end - pos) {
end[-1] = '\0';
return buf;
}
pos += ret;
}
return buf;
}
static char * wpa_config_write_scan_freq(const struct parse_data *data,
struct wpa_ssid *ssid)
{
return wpa_config_write_freqs(data, ssid->scan_freq);
}
static char * wpa_config_write_freq_list(const struct parse_data *data,
struct wpa_ssid *ssid)
{
return wpa_config_write_freqs(data, ssid->freq_list);
}
#endif /* NO_CONFIG_WRITE */
#ifdef IEEE8021X_EAPOL
static int wpa_config_parse_eap(const struct parse_data *data,
struct wpa_ssid *ssid, int line,
const char *value)
{
int last, errors = 0;
char *start, *end, *buf;
struct eap_method_type *methods = NULL, *tmp;
size_t num_methods = 0;
buf = os_strdup(value);
if (buf == NULL)
return -1;
start = buf;
while (*start != '\0') {
while (*start == ' ' || *start == '\t')
start++;
if (*start == '\0')
break;
end = start;
while (*end != ' ' && *end != '\t' && *end != '\0')
end++;
last = *end == '\0';
*end = '\0';
tmp = methods;
methods = os_realloc(methods,
(num_methods + 1) * sizeof(*methods));
if (methods == NULL) {
os_free(tmp);
os_free(buf);
return -1;
}
methods[num_methods].method = eap_peer_get_type(
start, &methods[num_methods].vendor);
if (methods[num_methods].vendor == EAP_VENDOR_IETF &&
methods[num_methods].method == EAP_TYPE_NONE) {
wpa_printf(MSG_ERROR, "Line %d: unknown EAP method "
"'%s'", line, start);
wpa_printf(MSG_ERROR, "You may need to add support for"
" this EAP method during wpa_supplicant\n"
"build time configuration.\n"
"See README for more information.");
errors++;
} else if (methods[num_methods].vendor == EAP_VENDOR_IETF &&
methods[num_methods].method == EAP_TYPE_LEAP)
ssid->leap++;
else
ssid->non_leap++;
num_methods++;
if (last)
break;
start = end + 1;
}
os_free(buf);
tmp = methods;
methods = os_realloc(methods, (num_methods + 1) * sizeof(*methods));
if (methods == NULL) {
os_free(tmp);
return -1;
}
methods[num_methods].vendor = EAP_VENDOR_IETF;
methods[num_methods].method = EAP_TYPE_NONE;
num_methods++;
wpa_hexdump(MSG_MSGDUMP, "eap methods",
(u8 *) methods, num_methods * sizeof(*methods));
ssid->eap.eap_methods = methods;
return errors ? -1 : 0;
}
static char * wpa_config_write_eap(const struct parse_data *data,
struct wpa_ssid *ssid)
{
int i, ret;
char *buf, *pos, *end;
const struct eap_method_type *eap_methods = ssid->eap.eap_methods;
const char *name;
if (eap_methods == NULL)
return NULL;
pos = buf = os_zalloc(100);
if (buf == NULL)
return NULL;
end = buf + 100;
for (i = 0; eap_methods[i].vendor != EAP_VENDOR_IETF ||
eap_methods[i].method != EAP_TYPE_NONE; i++) {
name = eap_get_name(eap_methods[i].vendor,
eap_methods[i].method);
if (name) {
ret = os_snprintf(pos, end - pos, "%s%s",
pos == buf ? "" : " ", name);
if (ret < 0 || ret >= end - pos)
break;
pos += ret;
}
}
end[-1] = '\0';
return buf;
}
static int wpa_config_parse_password(const struct parse_data *data,
struct wpa_ssid *ssid, int line,
const char *value)
{
u8 *hash;
if (os_strcmp(value, "NULL") == 0) {
wpa_printf(MSG_DEBUG, "Unset configuration string 'password'");
os_free(ssid->eap.password);
ssid->eap.password = NULL;
ssid->eap.password_len = 0;
return 0;
}
if (os_strncmp(value, "hash:", 5) != 0) {
char *tmp;
size_t res_len;
tmp = wpa_config_parse_string(value, &res_len);
if (tmp == NULL) {
wpa_printf(MSG_ERROR, "Line %d: failed to parse "
"password.", line);
return -1;
}
wpa_hexdump_ascii_key(MSG_MSGDUMP, data->name,
(u8 *) tmp, res_len);
os_free(ssid->eap.password);
ssid->eap.password = (u8 *) tmp;
ssid->eap.password_len = res_len;
ssid->eap.flags &= ~EAP_CONFIG_FLAGS_PASSWORD_NTHASH;
return 0;
}
/* NtPasswordHash: hash:<32 hex digits> */
if (os_strlen(value + 5) != 2 * 16) {
wpa_printf(MSG_ERROR, "Line %d: Invalid password hash length "
"(expected 32 hex digits)", line);
return -1;
}
hash = os_malloc(16);
if (hash == NULL)
return -1;
if (hexstr2bin(value + 5, hash, 16)) {
os_free(hash);
wpa_printf(MSG_ERROR, "Line %d: Invalid password hash", line);
return -1;
}
wpa_hexdump_key(MSG_MSGDUMP, data->name, hash, 16);
os_free(ssid->eap.password);
ssid->eap.password = hash;
ssid->eap.password_len = 16;
ssid->eap.flags |= EAP_CONFIG_FLAGS_PASSWORD_NTHASH;
return 0;
}
static char * wpa_config_write_password(const struct parse_data *data,
struct wpa_ssid *ssid)
{
char *buf;
if (ssid->eap.password == NULL)
return NULL;
if (!(ssid->eap.flags & EAP_CONFIG_FLAGS_PASSWORD_NTHASH)) {
return wpa_config_write_string(
ssid->eap.password, ssid->eap.password_len);
}
buf = os_malloc(5 + 32 + 1);
if (buf == NULL)
return NULL;
os_memcpy(buf, "hash:", 5);
wpa_snprintf_hex(buf + 5, 32 + 1, ssid->eap.password, 16);
return buf;
}
#endif /* IEEE8021X_EAPOL */
static int wpa_config_parse_wep_key(u8 *key, size_t *len, int line,
const char *value, int idx)
{
char *buf, title[20];
int res;
buf = wpa_config_parse_string(value, len);
if (buf == NULL) {
wpa_printf(MSG_ERROR, "Line %d: Invalid WEP key %d '%s'.",
line, idx, value);
return -1;
}
if (*len > MAX_WEP_KEY_LEN) {
wpa_printf(MSG_ERROR, "Line %d: Too long WEP key %d '%s'.",
line, idx, value);
os_free(buf);
return -1;
}
os_memcpy(key, buf, *len);
os_free(buf);
res = os_snprintf(title, sizeof(title), "wep_key%d", idx);
if (res >= 0 && (size_t) res < sizeof(title))
wpa_hexdump_key(MSG_MSGDUMP, title, key, *len);
return 0;
}
static int wpa_config_parse_wep_key0(const struct parse_data *data,
struct wpa_ssid *ssid, int line,
const char *value)
{
return wpa_config_parse_wep_key(ssid->wep_key[0],
&ssid->wep_key_len[0], line,
value, 0);
}
static int wpa_config_parse_wep_key1(const struct parse_data *data,
struct wpa_ssid *ssid, int line,
const char *value)
{
return wpa_config_parse_wep_key(ssid->wep_key[1],
&ssid->wep_key_len[1], line,
value, 1);
}
static int wpa_config_parse_wep_key2(const struct parse_data *data,
struct wpa_ssid *ssid, int line,
const char *value)
{
return wpa_config_parse_wep_key(ssid->wep_key[2],
&ssid->wep_key_len[2], line,
value, 2);
}
static int wpa_config_parse_wep_key3(const struct parse_data *data,
struct wpa_ssid *ssid, int line,
const char *value)
{
return wpa_config_parse_wep_key(ssid->wep_key[3],
&ssid->wep_key_len[3], line,
value, 3);
}
#ifndef NO_CONFIG_WRITE
static char * wpa_config_write_wep_key(struct wpa_ssid *ssid, int idx)
{
if (ssid->wep_key_len[idx] == 0)
return NULL;
return wpa_config_write_string(ssid->wep_key[idx],
ssid->wep_key_len[idx]);
}
static char * wpa_config_write_wep_key0(const struct parse_data *data,
struct wpa_ssid *ssid)
{
return wpa_config_write_wep_key(ssid, 0);
}
static char * wpa_config_write_wep_key1(const struct parse_data *data,
struct wpa_ssid *ssid)
{
return wpa_config_write_wep_key(ssid, 1);
}
static char * wpa_config_write_wep_key2(const struct parse_data *data,
struct wpa_ssid *ssid)
{
return wpa_config_write_wep_key(ssid, 2);
}
static char * wpa_config_write_wep_key3(const struct parse_data *data,
struct wpa_ssid *ssid)
{
return wpa_config_write_wep_key(ssid, 3);
}
#endif /* NO_CONFIG_WRITE */
/* Helper macros for network block parser */
#ifdef OFFSET
#undef OFFSET
#endif /* OFFSET */
/* OFFSET: Get offset of a variable within the wpa_ssid structure */
#define OFFSET(v) ((void *) &((struct wpa_ssid *) 0)->v)
/* STR: Define a string variable for an ASCII string; f = field name */
#ifdef NO_CONFIG_WRITE
#define _STR(f) #f, wpa_config_parse_str, OFFSET(f)
#define _STRe(f) #f, wpa_config_parse_str, OFFSET(eap.f)
#else /* NO_CONFIG_WRITE */
#define _STR(f) #f, wpa_config_parse_str, wpa_config_write_str, OFFSET(f)
#define _STRe(f) #f, wpa_config_parse_str, wpa_config_write_str, OFFSET(eap.f)
#endif /* NO_CONFIG_WRITE */
#define STR(f) _STR(f), NULL, NULL, NULL, 0
#define STRe(f) _STRe(f), NULL, NULL, NULL, 0
#define STR_KEY(f) _STR(f), NULL, NULL, NULL, 1
#define STR_KEYe(f) _STRe(f), NULL, NULL, NULL, 1
/* STR_LEN: Define a string variable with a separate variable for storing the
* data length. Unlike STR(), this can be used to store arbitrary binary data
* (i.e., even nul termination character). */
#define _STR_LEN(f) _STR(f), OFFSET(f ## _len)
#define _STR_LENe(f) _STRe(f), OFFSET(eap.f ## _len)
#define STR_LEN(f) _STR_LEN(f), NULL, NULL, 0
#define STR_LENe(f) _STR_LENe(f), NULL, NULL, 0
#define STR_LEN_KEY(f) _STR_LEN(f), NULL, NULL, 1
/* STR_RANGE: Like STR_LEN(), but with minimum and maximum allowed length
* explicitly specified. */
#define _STR_RANGE(f, min, max) _STR_LEN(f), (void *) (min), (void *) (max)
#define STR_RANGE(f, min, max) _STR_RANGE(f, min, max), 0
#define STR_RANGE_KEY(f, min, max) _STR_RANGE(f, min, max), 1
#ifdef NO_CONFIG_WRITE
#define _INT(f) #f, wpa_config_parse_int, OFFSET(f), (void *) 0
#define _INTe(f) #f, wpa_config_parse_int, OFFSET(eap.f), (void *) 0
#else /* NO_CONFIG_WRITE */
#define _INT(f) #f, wpa_config_parse_int, wpa_config_write_int, \
OFFSET(f), (void *) 0
#define _INTe(f) #f, wpa_config_parse_int, wpa_config_write_int, \
OFFSET(eap.f), (void *) 0
#endif /* NO_CONFIG_WRITE */
/* INT: Define an integer variable */
#define INT(f) _INT(f), NULL, NULL, 0
#define INTe(f) _INTe(f), NULL, NULL, 0
/* INT_RANGE: Define an integer variable with allowed value range */
#define INT_RANGE(f, min, max) _INT(f), (void *) (min), (void *) (max), 0
/* FUNC: Define a configuration variable that uses a custom function for
* parsing and writing the value. */
#ifdef NO_CONFIG_WRITE
#define _FUNC(f) #f, wpa_config_parse_ ## f, NULL, NULL, NULL, NULL
#else /* NO_CONFIG_WRITE */
#define _FUNC(f) #f, wpa_config_parse_ ## f, wpa_config_write_ ## f, \
NULL, NULL, NULL, NULL
#endif /* NO_CONFIG_WRITE */
#define FUNC(f) _FUNC(f), 0
#define FUNC_KEY(f) _FUNC(f), 1
/*
* Table of network configuration variables. This table is used to parse each
* network configuration variable, e.g., each line in wpa_supplicant.conf file
* that is inside a network block.
*
* This table is generated using the helper macros defined above and with
* generous help from the C pre-processor. The field name is stored as a string
* into .name and for STR and INT types, the offset of the target buffer within
* struct wpa_ssid is stored in .param1. .param2 (if not NULL) is similar
* offset to the field containing the length of the configuration variable.
* .param3 and .param4 can be used to mark the allowed range (length for STR
* and value for INT).
*
* For each configuration line in wpa_supplicant.conf, the parser goes through
* this table and select the entry that matches with the field name. The parser
* function (.parser) is then called to parse the actual value of the field.
*
* This kind of mechanism makes it easy to add new configuration parameters,
* since only one line needs to be added into this table and into the
* struct wpa_ssid definition if the new variable is either a string or
* integer. More complex types will need to use their own parser and writer
* functions.
*/
static const struct parse_data ssid_fields[] = {
{ STR_RANGE(ssid, 0, MAX_SSID_LEN) },
{ INT_RANGE(scan_ssid, 0, 1) },
{ FUNC(bssid) },
{ FUNC_KEY(psk) },
{ FUNC(proto) },
{ FUNC(key_mgmt) },
{ FUNC(pairwise) },
{ FUNC(group) },
{ FUNC(auth_alg) },
{ FUNC(scan_freq) },
{ FUNC(freq_list) },
#ifdef IEEE8021X_EAPOL
{ FUNC(eap) },
{ STR_LENe(identity) },
{ STR_LENe(anonymous_identity) },
{ FUNC_KEY(password) },
{ STRe(ca_cert) },
{ STRe(ca_path) },
{ STRe(client_cert) },
{ STRe(private_key) },
{ STR_KEYe(private_key_passwd) },
{ STRe(dh_file) },
{ STRe(subject_match) },
{ STRe(altsubject_match) },
{ STRe(ca_cert2) },
{ STRe(ca_path2) },
{ STRe(client_cert2) },
{ STRe(private_key2) },
{ STR_KEYe(private_key2_passwd) },
{ STRe(dh_file2) },
{ STRe(subject_match2) },
{ STRe(altsubject_match2) },
{ STRe(phase1) },
{ STRe(phase2) },
{ STRe(pcsc) },
{ STR_KEYe(pin) },
{ STRe(engine_id) },
{ STRe(key_id) },
{ STRe(cert_id) },
{ STRe(ca_cert_id) },
{ STR_KEYe(pin2) },
{ STRe(engine2_id) },
{ STRe(key2_id) },
{ STRe(cert2_id) },
{ STRe(ca_cert2_id) },
{ INTe(engine) },
{ INTe(engine2) },
{ INT(eapol_flags) },
#endif /* IEEE8021X_EAPOL */
{ FUNC_KEY(wep_key0) },
{ FUNC_KEY(wep_key1) },
{ FUNC_KEY(wep_key2) },
{ FUNC_KEY(wep_key3) },
{ INT(wep_tx_keyidx) },
{ INT(priority) },
#ifdef IEEE8021X_EAPOL
{ INT(eap_workaround) },
{ STRe(pac_file) },
{ INTe(fragment_size) },
#endif /* IEEE8021X_EAPOL */
{ INT_RANGE(mode, 0, 4) },
{ INT_RANGE(proactive_key_caching, 0, 1) },
{ INT_RANGE(disabled, 0, 2) },
{ STR(id_str) },
#ifdef CONFIG_IEEE80211W
{ INT_RANGE(ieee80211w, 0, 2) },
#endif /* CONFIG_IEEE80211W */
{ INT_RANGE(peerkey, 0, 1) },
{ INT_RANGE(mixed_cell, 0, 1) },
{ INT_RANGE(frequency, 0, 10000) },
{ INT(wpa_ptk_rekey) },
{ STR(bgscan) },
};
#undef OFFSET
#undef _STR
#undef STR
#undef STR_KEY
#undef _STR_LEN
#undef STR_LEN
#undef STR_LEN_KEY
#undef _STR_RANGE
#undef STR_RANGE
#undef STR_RANGE_KEY
#undef _INT
#undef INT
#undef INT_RANGE
#undef _FUNC
#undef FUNC
#undef FUNC_KEY
#define NUM_SSID_FIELDS (sizeof(ssid_fields) / sizeof(ssid_fields[0]))
/**
* wpa_config_add_prio_network - Add a network to priority lists
* @config: Configuration data from wpa_config_read()
* @ssid: Pointer to the network configuration to be added to the list
* Returns: 0 on success, -1 on failure
*
* This function is used to add a network block to the priority list of
* networks. This must be called for each network when reading in the full
* configuration. In addition, this can be used indirectly when updating
* priorities by calling wpa_config_update_prio_list().
*/
int wpa_config_add_prio_network(struct wpa_config *config,
struct wpa_ssid *ssid)
{
int prio;
struct wpa_ssid *prev, **nlist;
/*
* Add to an existing priority list if one is available for the
* configured priority level for this network.
*/
for (prio = 0; prio < config->num_prio; prio++) {
prev = config->pssid[prio];
if (prev->priority == ssid->priority) {
while (prev->pnext)
prev = prev->pnext;
prev->pnext = ssid;
return 0;
}
}
/* First network for this priority - add a new priority list */
nlist = os_realloc(config->pssid,
(config->num_prio + 1) * sizeof(struct wpa_ssid *));
if (nlist == NULL)
return -1;
for (prio = 0; prio < config->num_prio; prio++) {
if (nlist[prio]->priority < ssid->priority)
break;
}
os_memmove(&nlist[prio + 1], &nlist[prio],
(config->num_prio - prio) * sizeof(struct wpa_ssid *));
nlist[prio] = ssid;
config->num_prio++;
config->pssid = nlist;
return 0;
}
/**
* wpa_config_update_prio_list - Update network priority list
* @config: Configuration data from wpa_config_read()
* Returns: 0 on success, -1 on failure
*
* This function is called to update the priority list of networks in the
* configuration when a network is being added or removed. This is also called
* if a priority for a network is changed.
*/
int wpa_config_update_prio_list(struct wpa_config *config)
{
struct wpa_ssid *ssid;
int ret = 0;
os_free(config->pssid);
config->pssid = NULL;
config->num_prio = 0;
ssid = config->ssid;
while (ssid) {
ssid->pnext = NULL;
if (wpa_config_add_prio_network(config, ssid) < 0)
ret = -1;
ssid = ssid->next;
}
return ret;
}
#ifdef IEEE8021X_EAPOL
static void eap_peer_config_free(struct eap_peer_config *eap)
{
os_free(eap->eap_methods);
os_free(eap->identity);
os_free(eap->anonymous_identity);
os_free(eap->password);
os_free(eap->ca_cert);
os_free(eap->ca_path);
os_free(eap->client_cert);
os_free(eap->private_key);
os_free(eap->private_key_passwd);
os_free(eap->dh_file);
os_free(eap->subject_match);
os_free(eap->altsubject_match);
os_free(eap->ca_cert2);
os_free(eap->ca_path2);
os_free(eap->client_cert2);
os_free(eap->private_key2);
os_free(eap->private_key2_passwd);
os_free(eap->dh_file2);
os_free(eap->subject_match2);
os_free(eap->altsubject_match2);
os_free(eap->phase1);
os_free(eap->phase2);
os_free(eap->pcsc);
os_free(eap->pin);
os_free(eap->engine_id);
os_free(eap->key_id);
os_free(eap->cert_id);
os_free(eap->ca_cert_id);
os_free(eap->key2_id);
os_free(eap->cert2_id);
os_free(eap->ca_cert2_id);
os_free(eap->pin2);
os_free(eap->engine2_id);
os_free(eap->otp);
os_free(eap->pending_req_otp);
os_free(eap->pac_file);
os_free(eap->new_password);
}
#endif /* IEEE8021X_EAPOL */
/**
* wpa_config_free_ssid - Free network/ssid configuration data
* @ssid: Configuration data for the network
*
* This function frees all resources allocated for the network configuration
* data.
*/
void wpa_config_free_ssid(struct wpa_ssid *ssid)
{
os_free(ssid->ssid);
os_free(ssid->passphrase);
#ifdef IEEE8021X_EAPOL
eap_peer_config_free(&ssid->eap);
#endif /* IEEE8021X_EAPOL */
os_free(ssid->id_str);
os_free(ssid->scan_freq);
os_free(ssid->freq_list);
os_free(ssid->bgscan);
os_free(ssid);
}
/**
* wpa_config_free - Free configuration data
* @config: Configuration data from wpa_config_read()
*
* This function frees all resources allocated for the configuration data by
* wpa_config_read().
*/
void wpa_config_free(struct wpa_config *config)
{
#ifndef CONFIG_NO_CONFIG_BLOBS
struct wpa_config_blob *blob, *prevblob;
#endif /* CONFIG_NO_CONFIG_BLOBS */
struct wpa_ssid *ssid, *prev = NULL;
int i;
ssid = config->ssid;
while (ssid) {
prev = ssid;
ssid = ssid->next;
wpa_config_free_ssid(prev);
}
#ifndef CONFIG_NO_CONFIG_BLOBS
blob = config->blobs;
prevblob = NULL;
while (blob) {
prevblob = blob;
blob = blob->next;
wpa_config_free_blob(prevblob);
}
#endif /* CONFIG_NO_CONFIG_BLOBS */
os_free(config->ctrl_interface);
os_free(config->ctrl_interface_group);
os_free(config->opensc_engine_path);
os_free(config->pkcs11_engine_path);
os_free(config->pkcs11_module_path);
os_free(config->driver_param);
os_free(config->device_name);
os_free(config->manufacturer);
os_free(config->model_name);
os_free(config->model_number);
os_free(config->serial_number);
os_free(config->device_type);
for (i = 0; i < MAX_SEC_DEVICE_TYPES; i++)
os_free(config->sec_device_type[i]);
os_free(config->config_methods);
os_free(config->p2p_ssid_postfix);
os_free(config->pssid);
os_free(config);
}
/**
* wpa_config_get_network - Get configured network based on id
* @config: Configuration data from wpa_config_read()
* @id: Unique network id to search for
* Returns: Network configuration or %NULL if not found
*/
struct wpa_ssid * wpa_config_get_network(struct wpa_config *config, int id)
{
struct wpa_ssid *ssid;
ssid = config->ssid;
while (ssid) {
if (id == ssid->id)
break;
ssid = ssid->next;
}
return ssid;
}
/**
* wpa_config_add_network - Add a new network with empty configuration
* @config: Configuration data from wpa_config_read()
* Returns: The new network configuration or %NULL if operation failed
*/
struct wpa_ssid * wpa_config_add_network(struct wpa_config *config)
{
int id;
struct wpa_ssid *ssid, *last = NULL;
id = -1;
ssid = config->ssid;
while (ssid) {
if (ssid->id > id)
id = ssid->id;
last = ssid;
ssid = ssid->next;
}
id++;
ssid = os_zalloc(sizeof(*ssid));
if (ssid == NULL)
return NULL;
ssid->id = id;
if (last)
last->next = ssid;
else
config->ssid = ssid;
wpa_config_update_prio_list(config);
return ssid;
}
/**
* wpa_config_remove_network - Remove a configured network based on id
* @config: Configuration data from wpa_config_read()
* @id: Unique network id to search for
* Returns: 0 on success, or -1 if the network was not found
*/
int wpa_config_remove_network(struct wpa_config *config, int id)
{
struct wpa_ssid *ssid, *prev = NULL;
ssid = config->ssid;
while (ssid) {
if (id == ssid->id)
break;
prev = ssid;
ssid = ssid->next;
}
if (ssid == NULL)
return -1;
if (prev)
prev->next = ssid->next;
else
config->ssid = ssid->next;
wpa_config_update_prio_list(config);
wpa_config_free_ssid(ssid);
return 0;
}
/**
* wpa_config_set_network_defaults - Set network default values
* @ssid: Pointer to network configuration data
*/
void wpa_config_set_network_defaults(struct wpa_ssid *ssid)
{
ssid->proto = DEFAULT_PROTO;
ssid->pairwise_cipher = DEFAULT_PAIRWISE;
ssid->group_cipher = DEFAULT_GROUP;
ssid->key_mgmt = DEFAULT_KEY_MGMT;
#ifdef IEEE8021X_EAPOL
ssid->eapol_flags = DEFAULT_EAPOL_FLAGS;
ssid->eap_workaround = DEFAULT_EAP_WORKAROUND;
ssid->eap.fragment_size = DEFAULT_FRAGMENT_SIZE;
#endif /* IEEE8021X_EAPOL */
}
/**
* wpa_config_set - Set a variable in network configuration
* @ssid: Pointer to network configuration data
* @var: Variable name, e.g., "ssid"
* @value: Variable value
* @line: Line number in configuration file or 0 if not used
* Returns: 0 on success, -1 on failure
*
* This function can be used to set network configuration variables based on
* both the configuration file and management interface input. The value
* parameter must be in the same format as the text-based configuration file is
* using. For example, strings are using double quotation marks.
*/
int wpa_config_set(struct wpa_ssid *ssid, const char *var, const char *value,
int line)
{
size_t i;
int ret = 0;
if (ssid == NULL || var == NULL || value == NULL)
return -1;
for (i = 0; i < NUM_SSID_FIELDS; i++) {
const struct parse_data *field = &ssid_fields[i];
if (os_strcmp(var, field->name) != 0)
continue;
if (field->parser(field, ssid, line, value)) {
if (line) {
wpa_printf(MSG_ERROR, "Line %d: failed to "
"parse %s '%s'.", line, var, value);
}
ret = -1;
}
break;
}
if (i == NUM_SSID_FIELDS) {
if (line) {
wpa_printf(MSG_ERROR, "Line %d: unknown network field "
"'%s'.", line, var);
}
ret = -1;
}
return ret;
}
/**
* wpa_config_get_all - Get all options from network configuration
* @ssid: Pointer to network configuration data
* @get_keys: Determines if keys/passwords will be included in returned list
* Returns: %NULL terminated list of all set keys and their values in the form
* of [key1, val1, key2, val2, ... , NULL]
*
* This function can be used to get list of all configured network properties.
* The caller is responsible for freeing the returned list and all its
* elements.
*/
char ** wpa_config_get_all(struct wpa_ssid *ssid, int get_keys)
{
const struct parse_data *field;
char *key, *value;
size_t i;
char **props;
int fields_num;
props = os_zalloc(sizeof(char *) * ((2 * NUM_SSID_FIELDS) + 1));
if (!props)
return NULL;
fields_num = 0;
for (i = 0; i < NUM_SSID_FIELDS; i++) {
field = &ssid_fields[i];
if (field->key_data && !get_keys)
continue;
value = field->writer(field, ssid);
if (value == NULL)
continue;
if (os_strlen(value) == 0) {
os_free(value);
continue;
}
key = os_strdup(field->name);
if (key == NULL) {
os_free(value);
goto err;
}
props[fields_num * 2] = key;
props[fields_num * 2 + 1] = value;
fields_num++;
}
return props;
err:
value = *props;
while (value)
os_free(value++);
os_free(props);
return NULL;
}
#ifndef NO_CONFIG_WRITE
/**
* wpa_config_get - Get a variable in network configuration
* @ssid: Pointer to network configuration data
* @var: Variable name, e.g., "ssid"
* Returns: Value of the variable or %NULL on failure
*
* This function can be used to get network configuration variables. The
* returned value is a copy of the configuration variable in text format, i.e,.
* the same format that the text-based configuration file and wpa_config_set()
* are using for the value. The caller is responsible for freeing the returned
* value.
*/
char * wpa_config_get(struct wpa_ssid *ssid, const char *var)
{
size_t i;
if (ssid == NULL || var == NULL)
return NULL;
for (i = 0; i < NUM_SSID_FIELDS; i++) {
const struct parse_data *field = &ssid_fields[i];
if (os_strcmp(var, field->name) == 0)
return field->writer(field, ssid);
}
return NULL;
}
/**
* wpa_config_get_no_key - Get a variable in network configuration (no keys)
* @ssid: Pointer to network configuration data
* @var: Variable name, e.g., "ssid"
* Returns: Value of the variable or %NULL on failure
*
* This function can be used to get network configuration variable like
* wpa_config_get(). The only difference is that this functions does not expose
* key/password material from the configuration. In case a key/password field
* is requested, the returned value is an empty string or %NULL if the variable
* is not set or "*" if the variable is set (regardless of its value). The
* returned value is a copy of the configuration variable in text format, i.e,.
* the same format that the text-based configuration file and wpa_config_set()
* are using for the value. The caller is responsible for freeing the returned
* value.
*/
char * wpa_config_get_no_key(struct wpa_ssid *ssid, const char *var)
{
size_t i;
if (ssid == NULL || var == NULL)
return NULL;
for (i = 0; i < NUM_SSID_FIELDS; i++) {
const struct parse_data *field = &ssid_fields[i];
if (os_strcmp(var, field->name) == 0) {
char *res = field->writer(field, ssid);
if (field->key_data) {
if (res && res[0]) {
wpa_printf(MSG_DEBUG, "Do not allow "
"key_data field to be "
"exposed");
os_free(res);
return os_strdup("*");
}
os_free(res);
return NULL;
}
return res;
}
}
return NULL;
}
#endif /* NO_CONFIG_WRITE */
/**
* wpa_config_update_psk - Update WPA PSK based on passphrase and SSID
* @ssid: Pointer to network configuration data
*
* This function must be called to update WPA PSK when either SSID or the
* passphrase has changed for the network configuration.
*/
void wpa_config_update_psk(struct wpa_ssid *ssid)
{
#ifndef CONFIG_NO_PBKDF2
pbkdf2_sha1(ssid->passphrase,
(char *) ssid->ssid, ssid->ssid_len, 4096,
ssid->psk, PMK_LEN);
wpa_hexdump_key(MSG_MSGDUMP, "PSK (from passphrase)",
ssid->psk, PMK_LEN);
ssid->psk_set = 1;
#endif /* CONFIG_NO_PBKDF2 */
}
#ifndef CONFIG_NO_CONFIG_BLOBS
/**
* wpa_config_get_blob - Get a named configuration blob
* @config: Configuration data from wpa_config_read()
* @name: Name of the blob
* Returns: Pointer to blob data or %NULL if not found
*/
const struct wpa_config_blob * wpa_config_get_blob(struct wpa_config *config,
const char *name)
{
struct wpa_config_blob *blob = config->blobs;
while (blob) {
if (os_strcmp(blob->name, name) == 0)
return blob;
blob = blob->next;
}
return NULL;
}
/**
* wpa_config_set_blob - Set or add a named configuration blob
* @config: Configuration data from wpa_config_read()
* @blob: New value for the blob
*
* Adds a new configuration blob or replaces the current value of an existing
* blob.
*/
void wpa_config_set_blob(struct wpa_config *config,
struct wpa_config_blob *blob)
{
wpa_config_remove_blob(config, blob->name);
blob->next = config->blobs;
config->blobs = blob;
}
/**
* wpa_config_free_blob - Free blob data
* @blob: Pointer to blob to be freed
*/
void wpa_config_free_blob(struct wpa_config_blob *blob)
{
if (blob) {
os_free(blob->name);
os_free(blob->data);
os_free(blob);
}
}
/**
* wpa_config_remove_blob - Remove a named configuration blob
* @config: Configuration data from wpa_config_read()
* @name: Name of the blob to remove
* Returns: 0 if blob was removed or -1 if blob was not found
*/
int wpa_config_remove_blob(struct wpa_config *config, const char *name)
{
struct wpa_config_blob *pos = config->blobs, *prev = NULL;
while (pos) {
if (os_strcmp(pos->name, name) == 0) {
if (prev)
prev->next = pos->next;
else
config->blobs = pos->next;
wpa_config_free_blob(pos);
return 0;
}
prev = pos;
pos = pos->next;
}
return -1;
}
#endif /* CONFIG_NO_CONFIG_BLOBS */
/**
* wpa_config_alloc_empty - Allocate an empty configuration
* @ctrl_interface: Control interface parameters, e.g., path to UNIX domain
* socket
* @driver_param: Driver parameters
* Returns: Pointer to allocated configuration data or %NULL on failure
*/
struct wpa_config * wpa_config_alloc_empty(const char *ctrl_interface,
const char *driver_param)
{
struct wpa_config *config;
config = os_zalloc(sizeof(*config));
if (config == NULL)
return NULL;
config->eapol_version = DEFAULT_EAPOL_VERSION;
config->ap_scan = DEFAULT_AP_SCAN;
config->fast_reauth = DEFAULT_FAST_REAUTH;
config->p2p_go_intent = DEFAULT_P2P_GO_INTENT;
config->p2p_intra_bss = DEFAULT_P2P_INTRA_BSS;
config->bss_max_count = DEFAULT_BSS_MAX_COUNT;
config->max_num_sta = DEFAULT_MAX_NUM_STA;
if (ctrl_interface)
config->ctrl_interface = os_strdup(ctrl_interface);
if (driver_param)
config->driver_param = os_strdup(driver_param);
return config;
}
#ifndef CONFIG_NO_STDOUT_DEBUG
/**
* wpa_config_debug_dump_networks - Debug dump of configured networks
* @config: Configuration data from wpa_config_read()
*/
void wpa_config_debug_dump_networks(struct wpa_config *config)
{
int prio;
struct wpa_ssid *ssid;
for (prio = 0; prio < config->num_prio; prio++) {
ssid = config->pssid[prio];
wpa_printf(MSG_DEBUG, "Priority group %d",
ssid->priority);
while (ssid) {
wpa_printf(MSG_DEBUG, " id=%d ssid='%s'",
ssid->id,
wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
ssid = ssid->pnext;
}
}
}
#endif /* CONFIG_NO_STDOUT_DEBUG */
struct global_parse_data {
char *name;
int (*parser)(const struct global_parse_data *data,
struct wpa_config *config, int line, const char *value);
void *param1, *param2, *param3;
unsigned int changed_flag;
};
static int wpa_global_config_parse_int(const struct global_parse_data *data,
struct wpa_config *config, int line,
const char *pos)
{
int *dst;
dst = (int *) (((u8 *) config) + (long) data->param1);
*dst = atoi(pos);
wpa_printf(MSG_DEBUG, "%s=%d", data->name, *dst);
if (data->param2 && *dst < (long) data->param2) {
wpa_printf(MSG_ERROR, "Line %d: too small %s (value=%d "
"min_value=%ld)", line, data->name, *dst,
(long) data->param2);
*dst = (long) data->param2;
return -1;
}
if (data->param3 && *dst > (long) data->param3) {
wpa_printf(MSG_ERROR, "Line %d: too large %s (value=%d "
"max_value=%ld)", line, data->name, *dst,
(long) data->param3);
*dst = (long) data->param3;
return -1;
}
return 0;
}
static int wpa_global_config_parse_str(const struct global_parse_data *data,
struct wpa_config *config, int line,
const char *pos)
{
size_t len;
char **dst, *tmp;
len = os_strlen(pos);
if (data->param2 && len < (size_t) data->param2) {
wpa_printf(MSG_ERROR, "Line %d: too short %s (len=%lu "
"min_len=%ld)", line, data->name,
(unsigned long) len, (long) data->param2);
return -1;
}
if (data->param3 && len > (size_t) data->param3) {
wpa_printf(MSG_ERROR, "Line %d: too long %s (len=%lu "
"max_len=%ld)", line, data->name,
(unsigned long) len, (long) data->param3);
return -1;
}
tmp = os_strdup(pos);
if (tmp == NULL)
return -1;
dst = (char **) (((u8 *) config) + (long) data->param1);
os_free(*dst);
*dst = tmp;
wpa_printf(MSG_DEBUG, "%s='%s'", data->name, *dst);
return 0;
}
static int wpa_config_process_country(const struct global_parse_data *data,
struct wpa_config *config, int line,
const char *pos)
{
if (!pos[0] || !pos[1]) {
wpa_printf(MSG_DEBUG, "Invalid country set");
return -1;
}
config->country[0] = pos[0];
config->country[1] = pos[1];
wpa_printf(MSG_DEBUG, "country='%c%c'",
config->country[0], config->country[1]);
return 0;
}
static int wpa_config_process_load_dynamic_eap(
const struct global_parse_data *data, struct wpa_config *config,
int line, const char *so)
{
int ret;
wpa_printf(MSG_DEBUG, "load_dynamic_eap=%s", so);
ret = eap_peer_method_load(so);
if (ret == -2) {
wpa_printf(MSG_DEBUG, "This EAP type was already loaded - not "
"reloading.");
} else if (ret) {
wpa_printf(MSG_ERROR, "Line %d: Failed to load dynamic EAP "
"method '%s'.", line, so);
return -1;
}
return 0;
}
#ifdef CONFIG_WPS
static int wpa_config_process_uuid(const struct global_parse_data *data,
struct wpa_config *config, int line,
const char *pos)
{
char buf[40];
if (uuid_str2bin(pos, config->uuid)) {
wpa_printf(MSG_ERROR, "Line %d: invalid UUID", line);
return -1;
}
uuid_bin2str(config->uuid, buf, sizeof(buf));
wpa_printf(MSG_DEBUG, "uuid=%s", buf);
return 0;
}
static int wpa_config_process_os_version(const struct global_parse_data *data,
struct wpa_config *config, int line,
const char *pos)
{
if (hexstr2bin(pos, config->os_version, 4)) {
wpa_printf(MSG_ERROR, "Line %d: invalid os_version", line);
return -1;
}
wpa_printf(MSG_DEBUG, "os_version=%08x",
WPA_GET_BE32(config->os_version));
return 0;
}
#endif /* CONFIG_WPS */
#ifdef CONFIG_P2P
static int wpa_config_process_sec_device_type(
const struct global_parse_data *data,
struct wpa_config *config, int line, const char *pos)
{
int idx;
for (idx = 0; idx < MAX_SEC_DEVICE_TYPES; idx++)
if (config->sec_device_type[idx] == NULL)
break;
if (idx == MAX_SEC_DEVICE_TYPES) {
wpa_printf(MSG_ERROR, "Line %d: too many sec_device_type "
"items", line);
return -1;
}
config->sec_device_type[idx] = os_strdup(pos);
if (config->sec_device_type[idx] == NULL)
return -1;
return 0;
}
#endif /* CONFIG_P2P */
#ifdef OFFSET
#undef OFFSET
#endif /* OFFSET */
/* OFFSET: Get offset of a variable within the wpa_config structure */
#define OFFSET(v) ((void *) &((struct wpa_config *) 0)->v)
#define FUNC(f) #f, wpa_config_process_ ## f, OFFSET(f), NULL, NULL
#define FUNC_NO_VAR(f) #f, wpa_config_process_ ## f, NULL, NULL, NULL
#define _INT(f) #f, wpa_global_config_parse_int, OFFSET(f)
#define INT(f) _INT(f), NULL, NULL
#define INT_RANGE(f, min, max) _INT(f), (void *) min, (void *) max
#define _STR(f) #f, wpa_global_config_parse_str, OFFSET(f)
#define STR(f) _STR(f), NULL, NULL
#define STR_RANGE(f, min, max) _STR(f), (void *) min, (void *) max
static const struct global_parse_data global_fields[] = {
#ifdef CONFIG_CTRL_IFACE
{ STR(ctrl_interface), 0 },
{ STR(ctrl_interface_group), 0 } /* deprecated */,
#endif /* CONFIG_CTRL_IFACE */
{ INT_RANGE(eapol_version, 1, 2), 0 },
{ INT(ap_scan), 0 },
{ INT(fast_reauth), 0 },
{ STR(opensc_engine_path), 0 },
{ STR(pkcs11_engine_path), 0 },
{ STR(pkcs11_module_path), 0 },
{ STR(driver_param), 0 },
{ INT(dot11RSNAConfigPMKLifetime), 0 },
{ INT(dot11RSNAConfigPMKReauthThreshold), 0 },
{ INT(dot11RSNAConfigSATimeout), 0 },
#ifndef CONFIG_NO_CONFIG_WRITE
{ INT(update_config), 0 },
#endif /* CONFIG_NO_CONFIG_WRITE */
{ FUNC_NO_VAR(load_dynamic_eap), 0 },
#ifdef CONFIG_WPS
{ FUNC(uuid), CFG_CHANGED_UUID },
{ STR_RANGE(device_name, 0, 32), CFG_CHANGED_DEVICE_NAME },
{ STR_RANGE(manufacturer, 0, 64), CFG_CHANGED_WPS_STRING },
{ STR_RANGE(model_name, 0, 32), CFG_CHANGED_WPS_STRING },
{ STR_RANGE(model_number, 0, 32), CFG_CHANGED_WPS_STRING },
{ STR_RANGE(serial_number, 0, 32), CFG_CHANGED_WPS_STRING },
{ STR(device_type), CFG_CHANGED_DEVICE_TYPE },
{ FUNC(os_version), CFG_CHANGED_OS_VERSION },
{ STR(config_methods), CFG_CHANGED_CONFIG_METHODS },
{ INT_RANGE(wps_cred_processing, 0, 2), 0 },
#endif /* CONFIG_WPS */
#ifdef CONFIG_P2P
{ FUNC(sec_device_type), CFG_CHANGED_SEC_DEVICE_TYPE },
{ INT(p2p_listen_reg_class), 0 },
{ INT(p2p_listen_channel), 0 },
{ INT(p2p_oper_reg_class), 0 },
{ INT(p2p_oper_channel), 0 },
{ INT_RANGE(p2p_go_intent, 0, 15), 0 },
{ STR(p2p_ssid_postfix), CFG_CHANGED_P2P_SSID_POSTFIX },
{ INT_RANGE(persistent_reconnect, 0, 1), 0 },
{ INT_RANGE(p2p_intra_bss, 0, 1), CFG_CHANGED_P2P_INTRA_BSS },
{ INT(p2p_group_idle), 0 },
#endif /* CONFIG_P2P */
{ FUNC(country), CFG_CHANGED_COUNTRY },
{ INT(bss_max_count), 0 },
{ INT_RANGE(filter_ssids, 0, 1), 0 },
{ INT(max_num_sta), 0 },
{ INT_RANGE(disassoc_low_ack, 0, 1), 0 }
};
#undef FUNC
#undef _INT
#undef INT
#undef INT_RANGE
#undef _STR
#undef STR
#undef STR_RANGE
#define NUM_GLOBAL_FIELDS (sizeof(global_fields) / sizeof(global_fields[0]))
int wpa_config_process_global(struct wpa_config *config, char *pos, int line)
{
size_t i;
int ret = 0;
for (i = 0; i < NUM_GLOBAL_FIELDS; i++) {
const struct global_parse_data *field = &global_fields[i];
size_t flen = os_strlen(field->name);
if (os_strncmp(pos, field->name, flen) != 0 ||
pos[flen] != '=')
continue;
if (field->parser(field, config, line, pos + flen + 1)) {
wpa_printf(MSG_ERROR, "Line %d: failed to "
"parse '%s'.", line, pos);
ret = -1;
}
config->changed_parameters |= field->changed_flag;
break;
}
if (i == NUM_GLOBAL_FIELDS) {
if (line < 0)
return -1;
wpa_printf(MSG_ERROR, "Line %d: unknown global field '%s'.",
line, pos);
ret = -1;
}
return ret;
}
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