hostap/wpa_supplicant/config_file.c
Jouni Malinen 1a712d2fc1 Interworking: Add support for credential priorities
This allows credentials to be set with a specific priority to allow
the automatic network selection behavior to be controlled with user
preferences. The priority values are configured to the network block
and BSS selection will select the network based on priorities from
both pre-configured network blocks and credentials.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-02-16 16:37:21 +02:00

875 lines
21 KiB
C

/*
* WPA Supplicant / Configuration backend: text file
* Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*
* This file implements a configuration backend for text files. All the
* configuration information is stored in a text file that uses a format
* described in the sample configuration file, wpa_supplicant.conf.
*/
#include "includes.h"
#include "common.h"
#include "config.h"
#include "base64.h"
#include "uuid.h"
/**
* wpa_config_get_line - Read the next configuration file line
* @s: Buffer for the line
* @size: The buffer length
* @stream: File stream to read from
* @line: Pointer to a variable storing the file line number
* @_pos: Buffer for the pointer to the beginning of data on the text line or
* %NULL if not needed (returned value used instead)
* Returns: Pointer to the beginning of data on the text line or %NULL if no
* more text lines are available.
*
* This function reads the next non-empty line from the configuration file and
* removes comments. The returned string is guaranteed to be null-terminated.
*/
static char * wpa_config_get_line(char *s, int size, FILE *stream, int *line,
char **_pos)
{
char *pos, *end, *sstart;
while (fgets(s, size, stream)) {
(*line)++;
s[size - 1] = '\0';
pos = s;
/* Skip white space from the beginning of line. */
while (*pos == ' ' || *pos == '\t' || *pos == '\r')
pos++;
/* Skip comment lines and empty lines */
if (*pos == '#' || *pos == '\n' || *pos == '\0')
continue;
/*
* Remove # comments unless they are within a double quoted
* string.
*/
sstart = os_strchr(pos, '"');
if (sstart)
sstart = os_strrchr(sstart + 1, '"');
if (!sstart)
sstart = pos;
end = os_strchr(sstart, '#');
if (end)
*end-- = '\0';
else
end = pos + os_strlen(pos) - 1;
/* Remove trailing white space. */
while (end > pos &&
(*end == '\n' || *end == ' ' || *end == '\t' ||
*end == '\r'))
*end-- = '\0';
if (*pos == '\0')
continue;
if (_pos)
*_pos = pos;
return pos;
}
if (_pos)
*_pos = NULL;
return NULL;
}
static int wpa_config_validate_network(struct wpa_ssid *ssid, int line)
{
int errors = 0;
if (ssid->passphrase) {
if (ssid->psk_set) {
wpa_printf(MSG_ERROR, "Line %d: both PSK and "
"passphrase configured.", line);
errors++;
}
wpa_config_update_psk(ssid);
}
if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !ssid->psk_set) {
wpa_printf(MSG_ERROR, "Line %d: WPA-PSK accepted for key "
"management, but no PSK configured.", line);
errors++;
}
if ((ssid->group_cipher & WPA_CIPHER_CCMP) &&
!(ssid->pairwise_cipher & WPA_CIPHER_CCMP) &&
!(ssid->pairwise_cipher & WPA_CIPHER_NONE)) {
/* Group cipher cannot be stronger than the pairwise cipher. */
wpa_printf(MSG_DEBUG, "Line %d: removed CCMP from group cipher"
" list since it was not allowed for pairwise "
"cipher", line);
ssid->group_cipher &= ~WPA_CIPHER_CCMP;
}
return errors;
}
static struct wpa_ssid * wpa_config_read_network(FILE *f, int *line, int id)
{
struct wpa_ssid *ssid;
int errors = 0, end = 0;
char buf[256], *pos, *pos2;
wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new network block",
*line);
ssid = os_zalloc(sizeof(*ssid));
if (ssid == NULL)
return NULL;
ssid->id = id;
wpa_config_set_network_defaults(ssid);
while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
if (os_strcmp(pos, "}") == 0) {
end = 1;
break;
}
pos2 = os_strchr(pos, '=');
if (pos2 == NULL) {
wpa_printf(MSG_ERROR, "Line %d: Invalid SSID line "
"'%s'.", *line, pos);
errors++;
continue;
}
*pos2++ = '\0';
if (*pos2 == '"') {
if (os_strchr(pos2 + 1, '"') == NULL) {
wpa_printf(MSG_ERROR, "Line %d: invalid "
"quotation '%s'.", *line, pos2);
errors++;
continue;
}
}
if (wpa_config_set(ssid, pos, pos2, *line) < 0)
errors++;
}
if (!end) {
wpa_printf(MSG_ERROR, "Line %d: network block was not "
"terminated properly.", *line);
errors++;
}
errors += wpa_config_validate_network(ssid, *line);
if (errors) {
wpa_config_free_ssid(ssid);
ssid = NULL;
}
return ssid;
}
static struct wpa_cred * wpa_config_read_cred(FILE *f, int *line, int id)
{
struct wpa_cred *cred;
int errors = 0, end = 0;
char buf[256], *pos, *pos2;
wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new cred block", *line);
cred = os_zalloc(sizeof(*cred));
if (cred == NULL)
return NULL;
cred->id = id;
while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
if (os_strcmp(pos, "}") == 0) {
end = 1;
break;
}
pos2 = os_strchr(pos, '=');
if (pos2 == NULL) {
wpa_printf(MSG_ERROR, "Line %d: Invalid cred line "
"'%s'.", *line, pos);
errors++;
continue;
}
*pos2++ = '\0';
if (*pos2 == '"') {
if (os_strchr(pos2 + 1, '"') == NULL) {
wpa_printf(MSG_ERROR, "Line %d: invalid "
"quotation '%s'.", *line, pos2);
errors++;
continue;
}
}
if (wpa_config_set_cred(cred, pos, pos2, *line) < 0)
errors++;
}
if (!end) {
wpa_printf(MSG_ERROR, "Line %d: cred block was not "
"terminated properly.", *line);
errors++;
}
if (errors) {
wpa_config_free_cred(cred);
cred = NULL;
}
return cred;
}
#ifndef CONFIG_NO_CONFIG_BLOBS
static struct wpa_config_blob * wpa_config_read_blob(FILE *f, int *line,
const char *name)
{
struct wpa_config_blob *blob;
char buf[256], *pos;
unsigned char *encoded = NULL, *nencoded;
int end = 0;
size_t encoded_len = 0, len;
wpa_printf(MSG_MSGDUMP, "Line: %d - start of a new named blob '%s'",
*line, name);
while (wpa_config_get_line(buf, sizeof(buf), f, line, &pos)) {
if (os_strcmp(pos, "}") == 0) {
end = 1;
break;
}
len = os_strlen(pos);
nencoded = os_realloc(encoded, encoded_len + len);
if (nencoded == NULL) {
wpa_printf(MSG_ERROR, "Line %d: not enough memory for "
"blob", *line);
os_free(encoded);
return NULL;
}
encoded = nencoded;
os_memcpy(encoded + encoded_len, pos, len);
encoded_len += len;
}
if (!end) {
wpa_printf(MSG_ERROR, "Line %d: blob was not terminated "
"properly", *line);
os_free(encoded);
return NULL;
}
blob = os_zalloc(sizeof(*blob));
if (blob == NULL) {
os_free(encoded);
return NULL;
}
blob->name = os_strdup(name);
blob->data = base64_decode(encoded, encoded_len, &blob->len);
os_free(encoded);
if (blob->name == NULL || blob->data == NULL) {
wpa_config_free_blob(blob);
return NULL;
}
return blob;
}
static int wpa_config_process_blob(struct wpa_config *config, FILE *f,
int *line, char *bname)
{
char *name_end;
struct wpa_config_blob *blob;
name_end = os_strchr(bname, '=');
if (name_end == NULL) {
wpa_printf(MSG_ERROR, "Line %d: no blob name terminator",
*line);
return -1;
}
*name_end = '\0';
blob = wpa_config_read_blob(f, line, bname);
if (blob == NULL) {
wpa_printf(MSG_ERROR, "Line %d: failed to read blob %s",
*line, bname);
return -1;
}
wpa_config_set_blob(config, blob);
return 0;
}
#endif /* CONFIG_NO_CONFIG_BLOBS */
struct wpa_config * wpa_config_read(const char *name)
{
FILE *f;
char buf[256], *pos;
int errors = 0, line = 0;
struct wpa_ssid *ssid, *tail = NULL, *head = NULL;
struct wpa_cred *cred, *cred_tail = NULL, *cred_head = NULL;
struct wpa_config *config;
int id = 0;
int cred_id = 0;
config = wpa_config_alloc_empty(NULL, NULL);
if (config == NULL)
return NULL;
wpa_printf(MSG_DEBUG, "Reading configuration file '%s'", name);
f = fopen(name, "r");
if (f == NULL) {
os_free(config);
return NULL;
}
while (wpa_config_get_line(buf, sizeof(buf), f, &line, &pos)) {
if (os_strcmp(pos, "network={") == 0) {
ssid = wpa_config_read_network(f, &line, id++);
if (ssid == NULL) {
wpa_printf(MSG_ERROR, "Line %d: failed to "
"parse network block.", line);
errors++;
continue;
}
if (head == NULL) {
head = tail = ssid;
} else {
tail->next = ssid;
tail = ssid;
}
if (wpa_config_add_prio_network(config, ssid)) {
wpa_printf(MSG_ERROR, "Line %d: failed to add "
"network block to priority list.",
line);
errors++;
continue;
}
} else if (os_strcmp(pos, "cred={") == 0) {
cred = wpa_config_read_cred(f, &line, cred_id++);
if (cred == NULL) {
wpa_printf(MSG_ERROR, "Line %d: failed to "
"parse cred block.", line);
errors++;
continue;
}
if (cred_head == NULL) {
cred_head = cred_tail = cred;
} else {
cred_tail->next = cred;
cred_tail = cred;
}
#ifndef CONFIG_NO_CONFIG_BLOBS
} else if (os_strncmp(pos, "blob-base64-", 12) == 0) {
if (wpa_config_process_blob(config, f, &line, pos + 12)
< 0) {
errors++;
continue;
}
#endif /* CONFIG_NO_CONFIG_BLOBS */
} else if (wpa_config_process_global(config, pos, line) < 0) {
wpa_printf(MSG_ERROR, "Line %d: Invalid configuration "
"line '%s'.", line, pos);
errors++;
continue;
}
}
fclose(f);
config->ssid = head;
wpa_config_debug_dump_networks(config);
config->cred = cred_head;
#ifndef WPA_IGNORE_CONFIG_ERRORS
if (errors) {
wpa_config_free(config);
config = NULL;
head = NULL;
}
#endif /* WPA_IGNORE_CONFIG_ERRORS */
return config;
}
#ifndef CONFIG_NO_CONFIG_WRITE
static void write_str(FILE *f, const char *field, struct wpa_ssid *ssid)
{
char *value = wpa_config_get(ssid, field);
if (value == NULL)
return;
fprintf(f, "\t%s=%s\n", field, value);
os_free(value);
}
static void write_int(FILE *f, const char *field, int value, int def)
{
if (value == def)
return;
fprintf(f, "\t%s=%d\n", field, value);
}
static void write_bssid(FILE *f, struct wpa_ssid *ssid)
{
char *value = wpa_config_get(ssid, "bssid");
if (value == NULL)
return;
fprintf(f, "\tbssid=%s\n", value);
os_free(value);
}
static void write_psk(FILE *f, struct wpa_ssid *ssid)
{
char *value = wpa_config_get(ssid, "psk");
if (value == NULL)
return;
fprintf(f, "\tpsk=%s\n", value);
os_free(value);
}
static void write_proto(FILE *f, struct wpa_ssid *ssid)
{
char *value;
if (ssid->proto == DEFAULT_PROTO)
return;
value = wpa_config_get(ssid, "proto");
if (value == NULL)
return;
if (value[0])
fprintf(f, "\tproto=%s\n", value);
os_free(value);
}
static void write_key_mgmt(FILE *f, struct wpa_ssid *ssid)
{
char *value;
if (ssid->key_mgmt == DEFAULT_KEY_MGMT)
return;
value = wpa_config_get(ssid, "key_mgmt");
if (value == NULL)
return;
if (value[0])
fprintf(f, "\tkey_mgmt=%s\n", value);
os_free(value);
}
static void write_pairwise(FILE *f, struct wpa_ssid *ssid)
{
char *value;
if (ssid->pairwise_cipher == DEFAULT_PAIRWISE)
return;
value = wpa_config_get(ssid, "pairwise");
if (value == NULL)
return;
if (value[0])
fprintf(f, "\tpairwise=%s\n", value);
os_free(value);
}
static void write_group(FILE *f, struct wpa_ssid *ssid)
{
char *value;
if (ssid->group_cipher == DEFAULT_GROUP)
return;
value = wpa_config_get(ssid, "group");
if (value == NULL)
return;
if (value[0])
fprintf(f, "\tgroup=%s\n", value);
os_free(value);
}
static void write_auth_alg(FILE *f, struct wpa_ssid *ssid)
{
char *value;
if (ssid->auth_alg == 0)
return;
value = wpa_config_get(ssid, "auth_alg");
if (value == NULL)
return;
if (value[0])
fprintf(f, "\tauth_alg=%s\n", value);
os_free(value);
}
#ifdef IEEE8021X_EAPOL
static void write_eap(FILE *f, struct wpa_ssid *ssid)
{
char *value;
value = wpa_config_get(ssid, "eap");
if (value == NULL)
return;
if (value[0])
fprintf(f, "\teap=%s\n", value);
os_free(value);
}
#endif /* IEEE8021X_EAPOL */
static void write_wep_key(FILE *f, int idx, struct wpa_ssid *ssid)
{
char field[20], *value;
int res;
res = os_snprintf(field, sizeof(field), "wep_key%d", idx);
if (res < 0 || (size_t) res >= sizeof(field))
return;
value = wpa_config_get(ssid, field);
if (value) {
fprintf(f, "\t%s=%s\n", field, value);
os_free(value);
}
}
#ifdef CONFIG_P2P
static void write_p2p_client_list(FILE *f, struct wpa_ssid *ssid)
{
char *value = wpa_config_get(ssid, "p2p_client_list");
if (value == NULL)
return;
fprintf(f, "\tp2p_client_list=%s\n", value);
os_free(value);
}
#endif /* CONFIG_P2P */
static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
{
int i;
#define STR(t) write_str(f, #t, ssid)
#define INT(t) write_int(f, #t, ssid->t, 0)
#define INTe(t) write_int(f, #t, ssid->eap.t, 0)
#define INT_DEF(t, def) write_int(f, #t, ssid->t, def)
#define INT_DEFe(t, def) write_int(f, #t, ssid->eap.t, def)
STR(ssid);
INT(scan_ssid);
write_bssid(f, ssid);
write_psk(f, ssid);
write_proto(f, ssid);
write_key_mgmt(f, ssid);
write_pairwise(f, ssid);
write_group(f, ssid);
write_auth_alg(f, ssid);
#ifdef IEEE8021X_EAPOL
write_eap(f, ssid);
STR(identity);
STR(anonymous_identity);
STR(password);
STR(ca_cert);
STR(ca_path);
STR(client_cert);
STR(private_key);
STR(private_key_passwd);
STR(dh_file);
STR(subject_match);
STR(altsubject_match);
STR(ca_cert2);
STR(ca_path2);
STR(client_cert2);
STR(private_key2);
STR(private_key2_passwd);
STR(dh_file2);
STR(subject_match2);
STR(altsubject_match2);
STR(phase1);
STR(phase2);
STR(pcsc);
STR(pin);
STR(engine_id);
STR(key_id);
STR(cert_id);
STR(ca_cert_id);
STR(key2_id);
STR(pin2);
STR(engine2_id);
STR(cert2_id);
STR(ca_cert2_id);
INTe(engine);
INTe(engine2);
INT_DEF(eapol_flags, DEFAULT_EAPOL_FLAGS);
#endif /* IEEE8021X_EAPOL */
for (i = 0; i < 4; i++)
write_wep_key(f, i, ssid);
INT(wep_tx_keyidx);
INT(priority);
#ifdef IEEE8021X_EAPOL
INT_DEF(eap_workaround, DEFAULT_EAP_WORKAROUND);
STR(pac_file);
INT_DEFe(fragment_size, DEFAULT_FRAGMENT_SIZE);
#endif /* IEEE8021X_EAPOL */
INT(mode);
INT(proactive_key_caching);
INT(disabled);
INT(peerkey);
#ifdef CONFIG_IEEE80211W
INT(ieee80211w);
#endif /* CONFIG_IEEE80211W */
STR(id_str);
#ifdef CONFIG_P2P
write_p2p_client_list(f, ssid);
#endif /* CONFIG_P2P */
#undef STR
#undef INT
#undef INT_DEF
}
static void wpa_config_write_cred(FILE *f, struct wpa_cred *cred)
{
if (cred->priority)
fprintf(f, "\tpriority=%d\n", cred->priority);
if (cred->realm)
fprintf(f, "\trealm=\"%s\"\n", cred->realm);
if (cred->username)
fprintf(f, "\tusername=\"%s\"\n", cred->username);
if (cred->password)
fprintf(f, "\tpassword=\"%s\"\n", cred->password);
if (cred->ca_cert)
fprintf(f, "\tca_cert=\"%s\"\n", cred->ca_cert);
if (cred->imsi)
fprintf(f, "\timsi=\"%s\"\n", cred->imsi);
if (cred->milenage)
fprintf(f, "\tmilenage=\"%s\"\n", cred->milenage);
if (cred->domain)
fprintf(f, "\tdomain=\"%s\"\n", cred->domain);
}
#ifndef CONFIG_NO_CONFIG_BLOBS
static int wpa_config_write_blob(FILE *f, struct wpa_config_blob *blob)
{
unsigned char *encoded;
encoded = base64_encode(blob->data, blob->len, NULL);
if (encoded == NULL)
return -1;
fprintf(f, "\nblob-base64-%s={\n%s}\n", blob->name, encoded);
os_free(encoded);
return 0;
}
#endif /* CONFIG_NO_CONFIG_BLOBS */
static void wpa_config_write_global(FILE *f, struct wpa_config *config)
{
#ifdef CONFIG_CTRL_IFACE
if (config->ctrl_interface)
fprintf(f, "ctrl_interface=%s\n", config->ctrl_interface);
if (config->ctrl_interface_group)
fprintf(f, "ctrl_interface_group=%s\n",
config->ctrl_interface_group);
#endif /* CONFIG_CTRL_IFACE */
if (config->eapol_version != DEFAULT_EAPOL_VERSION)
fprintf(f, "eapol_version=%d\n", config->eapol_version);
if (config->ap_scan != DEFAULT_AP_SCAN)
fprintf(f, "ap_scan=%d\n", config->ap_scan);
if (config->fast_reauth != DEFAULT_FAST_REAUTH)
fprintf(f, "fast_reauth=%d\n", config->fast_reauth);
if (config->opensc_engine_path)
fprintf(f, "opensc_engine_path=%s\n",
config->opensc_engine_path);
if (config->pkcs11_engine_path)
fprintf(f, "pkcs11_engine_path=%s\n",
config->pkcs11_engine_path);
if (config->pkcs11_module_path)
fprintf(f, "pkcs11_module_path=%s\n",
config->pkcs11_module_path);
if (config->driver_param)
fprintf(f, "driver_param=%s\n", config->driver_param);
if (config->dot11RSNAConfigPMKLifetime)
fprintf(f, "dot11RSNAConfigPMKLifetime=%d\n",
config->dot11RSNAConfigPMKLifetime);
if (config->dot11RSNAConfigPMKReauthThreshold)
fprintf(f, "dot11RSNAConfigPMKReauthThreshold=%d\n",
config->dot11RSNAConfigPMKReauthThreshold);
if (config->dot11RSNAConfigSATimeout)
fprintf(f, "dot11RSNAConfigSATimeout=%d\n",
config->dot11RSNAConfigSATimeout);
if (config->update_config)
fprintf(f, "update_config=%d\n", config->update_config);
#ifdef CONFIG_WPS
if (!is_nil_uuid(config->uuid)) {
char buf[40];
uuid_bin2str(config->uuid, buf, sizeof(buf));
fprintf(f, "uuid=%s\n", buf);
}
if (config->device_name)
fprintf(f, "device_name=%s\n", config->device_name);
if (config->manufacturer)
fprintf(f, "manufacturer=%s\n", config->manufacturer);
if (config->model_name)
fprintf(f, "model_name=%s\n", config->model_name);
if (config->model_number)
fprintf(f, "model_number=%s\n", config->model_number);
if (config->serial_number)
fprintf(f, "serial_number=%s\n", config->serial_number);
{
char _buf[WPS_DEV_TYPE_BUFSIZE], *buf;
buf = wps_dev_type_bin2str(config->device_type,
_buf, sizeof(_buf));
if (os_strcmp(buf, "0-00000000-0") != 0)
fprintf(f, "device_type=%s\n", buf);
}
if (WPA_GET_BE32(config->os_version))
fprintf(f, "os_version=%08x\n",
WPA_GET_BE32(config->os_version));
if (config->config_methods)
fprintf(f, "config_methods=%s\n", config->config_methods);
if (config->wps_cred_processing)
fprintf(f, "wps_cred_processing=%d\n",
config->wps_cred_processing);
#endif /* CONFIG_WPS */
#ifdef CONFIG_P2P
if (config->p2p_listen_reg_class)
fprintf(f, "p2p_listen_reg_class=%u\n",
config->p2p_listen_reg_class);
if (config->p2p_listen_channel)
fprintf(f, "p2p_listen_channel=%u\n",
config->p2p_listen_channel);
if (config->p2p_oper_reg_class)
fprintf(f, "p2p_oper_reg_class=%u\n",
config->p2p_oper_reg_class);
if (config->p2p_oper_channel)
fprintf(f, "p2p_oper_channel=%u\n", config->p2p_oper_channel);
if (config->p2p_go_intent != DEFAULT_P2P_GO_INTENT)
fprintf(f, "p2p_go_intent=%u\n", config->p2p_go_intent);
if (config->p2p_ssid_postfix)
fprintf(f, "p2p_ssid_postfix=%s\n", config->p2p_ssid_postfix);
if (config->persistent_reconnect)
fprintf(f, "persistent_reconnect=%u\n",
config->persistent_reconnect);
if (config->p2p_intra_bss != DEFAULT_P2P_INTRA_BSS)
fprintf(f, "p2p_intra_bss=%u\n", config->p2p_intra_bss);
if (config->p2p_group_idle)
fprintf(f, "p2p_group_idle=%u\n", config->p2p_group_idle);
#endif /* CONFIG_P2P */
if (config->country[0] && config->country[1]) {
fprintf(f, "country=%c%c\n",
config->country[0], config->country[1]);
}
if (config->bss_max_count != DEFAULT_BSS_MAX_COUNT)
fprintf(f, "bss_max_count=%u\n", config->bss_max_count);
if (config->bss_expiration_age != DEFAULT_BSS_EXPIRATION_AGE)
fprintf(f, "bss_expiration_age=%u\n",
config->bss_expiration_age);
if (config->bss_expiration_scan_count !=
DEFAULT_BSS_EXPIRATION_SCAN_COUNT)
fprintf(f, "bss_expiration_scan_count=%u\n",
config->bss_expiration_scan_count);
if (config->filter_ssids)
fprintf(f, "filter_ssids=%d\n", config->filter_ssids);
if (config->max_num_sta != DEFAULT_MAX_NUM_STA)
fprintf(f, "max_num_sta=%u\n", config->max_num_sta);
if (config->disassoc_low_ack)
fprintf(f, "disassoc_low_ack=%u\n", config->disassoc_low_ack);
#ifdef CONFIG_INTERWORKING
if (config->interworking)
fprintf(f, "interworking=%u\n", config->interworking);
if (!is_zero_ether_addr(config->hessid))
fprintf(f, "hessid=" MACSTR "\n", MAC2STR(config->hessid));
if (config->access_network_type != DEFAULT_ACCESS_NETWORK_TYPE)
fprintf(f, "access_network_type=%d\n",
config->access_network_type);
#endif /* CONFIG_INTERWORKING */
}
#endif /* CONFIG_NO_CONFIG_WRITE */
int wpa_config_write(const char *name, struct wpa_config *config)
{
#ifndef CONFIG_NO_CONFIG_WRITE
FILE *f;
struct wpa_ssid *ssid;
struct wpa_cred *cred;
#ifndef CONFIG_NO_CONFIG_BLOBS
struct wpa_config_blob *blob;
#endif /* CONFIG_NO_CONFIG_BLOBS */
int ret = 0;
wpa_printf(MSG_DEBUG, "Writing configuration file '%s'", name);
f = fopen(name, "w");
if (f == NULL) {
wpa_printf(MSG_DEBUG, "Failed to open '%s' for writing", name);
return -1;
}
wpa_config_write_global(f, config);
for (cred = config->cred; cred; cred = cred->next) {
fprintf(f, "\ncred={\n");
wpa_config_write_cred(f, cred);
fprintf(f, "}\n");
}
for (ssid = config->ssid; ssid; ssid = ssid->next) {
if (ssid->key_mgmt == WPA_KEY_MGMT_WPS || ssid->temporary)
continue; /* do not save temporary networks */
if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt) && !ssid->psk_set &&
!ssid->passphrase)
continue; /* do not save invalid network */
fprintf(f, "\nnetwork={\n");
wpa_config_write_network(f, ssid);
fprintf(f, "}\n");
}
#ifndef CONFIG_NO_CONFIG_BLOBS
for (blob = config->blobs; blob; blob = blob->next) {
ret = wpa_config_write_blob(f, blob);
if (ret)
break;
}
#endif /* CONFIG_NO_CONFIG_BLOBS */
fclose(f);
wpa_printf(MSG_DEBUG, "Configuration file '%s' written %ssuccessfully",
name, ret ? "un" : "");
return ret;
#else /* CONFIG_NO_CONFIG_WRITE */
return -1;
#endif /* CONFIG_NO_CONFIG_WRITE */
}