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fragattacks/src/ap/hostapd.c
Jouni Malinen a0f04da517 FST: Mark get_mb_ie() return value const 
The caller is not expected to free or modify the value since this is
returning a reference to a buffer maintained by the upper layer.

Signed-off-by: Jouni Malinen <j@w1.fi>
2015-07-18 17:23:55 +03:00

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/*
* hostapd / Initialization and configuration
* Copyright (c) 2002-2014, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "utils/includes.h"
#include "utils/common.h"
#include "utils/eloop.h"
#include "common/ieee802_11_defs.h"
#include "common/wpa_ctrl.h"
#include "radius/radius_client.h"
#include "radius/radius_das.h"
#include "eap_server/tncs.h"
#include "eapol_auth/eapol_auth_sm.h"
#include "eapol_auth/eapol_auth_sm_i.h"
#include "fst/fst.h"
#include "hostapd.h"
#include "authsrv.h"
#include "sta_info.h"
#include "accounting.h"
#include "ap_list.h"
#include "beacon.h"
#include "iapp.h"
#include "ieee802_1x.h"
#include "ieee802_11_auth.h"
#include "vlan_init.h"
#include "wpa_auth.h"
#include "wps_hostapd.h"
#include "hw_features.h"
#include "wpa_auth_glue.h"
#include "ap_drv_ops.h"
#include "ap_config.h"
#include "p2p_hostapd.h"
#include "gas_serv.h"
#include "dfs.h"
#include "ieee802_11.h"
#include "bss_load.h"
#include "x_snoop.h"
#include "dhcp_snoop.h"
#include "ndisc_snoop.h"
static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason);
static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd);
static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd);
static int setup_interface2(struct hostapd_iface *iface);
static void channel_list_update_timeout(void *eloop_ctx, void *timeout_ctx);
int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
int (*cb)(struct hostapd_iface *iface,
void *ctx), void *ctx)
{
size_t i;
int ret;
for (i = 0; i < interfaces->count; i++) {
ret = cb(interfaces->iface[i], ctx);
if (ret)
return ret;
}
return 0;
}
static void hostapd_reload_bss(struct hostapd_data *hapd)
{
struct hostapd_ssid *ssid;
#ifndef CONFIG_NO_RADIUS
radius_client_reconfig(hapd->radius, hapd->conf->radius);
#endif /* CONFIG_NO_RADIUS */
ssid = &hapd->conf->ssid;
if (!ssid->wpa_psk_set && ssid->wpa_psk && !ssid->wpa_psk->next &&
ssid->wpa_passphrase_set && ssid->wpa_passphrase) {
/*
* Force PSK to be derived again since SSID or passphrase may
* have changed.
*/
hostapd_config_clear_wpa_psk(&hapd->conf->ssid.wpa_psk);
}
if (hostapd_setup_wpa_psk(hapd->conf)) {
wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK "
"after reloading configuration");
}
if (hapd->conf->ieee802_1x || hapd->conf->wpa)
hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1);
else
hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
if ((hapd->conf->wpa || hapd->conf->osen) && hapd->wpa_auth == NULL) {
hostapd_setup_wpa(hapd);
if (hapd->wpa_auth)
wpa_init_keys(hapd->wpa_auth);
} else if (hapd->conf->wpa) {
const u8 *wpa_ie;
size_t wpa_ie_len;
hostapd_reconfig_wpa(hapd);
wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len);
if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len))
wpa_printf(MSG_ERROR, "Failed to configure WPA IE for "
"the kernel driver.");
} else if (hapd->wpa_auth) {
wpa_deinit(hapd->wpa_auth);
hapd->wpa_auth = NULL;
hostapd_set_privacy(hapd, 0);
hostapd_setup_encryption(hapd->conf->iface, hapd);
hostapd_set_generic_elem(hapd, (u8 *) "", 0);
}
ieee802_11_set_beacon(hapd);
hostapd_update_wps(hapd);
if (hapd->conf->ssid.ssid_set &&
hostapd_set_ssid(hapd, hapd->conf->ssid.ssid,
hapd->conf->ssid.ssid_len)) {
wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
/* try to continue */
}
wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface);
}
static void hostapd_clear_old(struct hostapd_iface *iface)
{
size_t j;
/*
* Deauthenticate all stations since the new configuration may not
* allow them to use the BSS anymore.
*/
for (j = 0; j < iface->num_bss; j++) {
hostapd_flush_old_stations(iface->bss[j],
WLAN_REASON_PREV_AUTH_NOT_VALID);
hostapd_broadcast_wep_clear(iface->bss[j]);
#ifndef CONFIG_NO_RADIUS
/* TODO: update dynamic data based on changed configuration
* items (e.g., open/close sockets, etc.) */
radius_client_flush(iface->bss[j]->radius, 0);
#endif /* CONFIG_NO_RADIUS */
}
}
int hostapd_reload_config(struct hostapd_iface *iface)
{
struct hostapd_data *hapd = iface->bss[0];
struct hostapd_config *newconf, *oldconf;
size_t j;
if (iface->config_fname == NULL) {
/* Only in-memory config in use - assume it has been updated */
hostapd_clear_old(iface);
for (j = 0; j < iface->num_bss; j++)
hostapd_reload_bss(iface->bss[j]);
return 0;
}
if (iface->interfaces == NULL ||
iface->interfaces->config_read_cb == NULL)
return -1;
newconf = iface->interfaces->config_read_cb(iface->config_fname);
if (newconf == NULL)
return -1;
hostapd_clear_old(iface);
oldconf = hapd->iconf;
iface->conf = newconf;
for (j = 0; j < iface->num_bss; j++) {
hapd = iface->bss[j];
hapd->iconf = newconf;
hapd->iconf->channel = oldconf->channel;
hapd->iconf->acs = oldconf->acs;
hapd->iconf->secondary_channel = oldconf->secondary_channel;
hapd->iconf->ieee80211n = oldconf->ieee80211n;
hapd->iconf->ieee80211ac = oldconf->ieee80211ac;
hapd->iconf->ht_capab = oldconf->ht_capab;
hapd->iconf->vht_capab = oldconf->vht_capab;
hapd->iconf->vht_oper_chwidth = oldconf->vht_oper_chwidth;
hapd->iconf->vht_oper_centr_freq_seg0_idx =
oldconf->vht_oper_centr_freq_seg0_idx;
hapd->iconf->vht_oper_centr_freq_seg1_idx =
oldconf->vht_oper_centr_freq_seg1_idx;
hapd->conf = newconf->bss[j];
hostapd_reload_bss(hapd);
}
hostapd_config_free(oldconf);
return 0;
}
static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd,
char *ifname)
{
int i;
for (i = 0; i < NUM_WEP_KEYS; i++) {
if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE, NULL, i,
0, NULL, 0, NULL, 0)) {
wpa_printf(MSG_DEBUG, "Failed to clear default "
"encryption keys (ifname=%s keyidx=%d)",
ifname, i);
}
}
#ifdef CONFIG_IEEE80211W
if (hapd->conf->ieee80211w) {
for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) {
if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE,
NULL, i, 0, NULL,
0, NULL, 0)) {
wpa_printf(MSG_DEBUG, "Failed to clear "
"default mgmt encryption keys "
"(ifname=%s keyidx=%d)", ifname, i);
}
}
}
#endif /* CONFIG_IEEE80211W */
}
static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd)
{
hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface);
return 0;
}
static int hostapd_broadcast_wep_set(struct hostapd_data *hapd)
{
int errors = 0, idx;
struct hostapd_ssid *ssid = &hapd->conf->ssid;
idx = ssid->wep.idx;
if (ssid->wep.default_len &&
hostapd_drv_set_key(hapd->conf->iface,
hapd, WPA_ALG_WEP, broadcast_ether_addr, idx,
1, NULL, 0, ssid->wep.key[idx],
ssid->wep.len[idx])) {
wpa_printf(MSG_WARNING, "Could not set WEP encryption.");
errors++;
}
return errors;
}
static void hostapd_free_hapd_data(struct hostapd_data *hapd)
{
os_free(hapd->probereq_cb);
hapd->probereq_cb = NULL;
#ifdef CONFIG_P2P
wpabuf_free(hapd->p2p_beacon_ie);
hapd->p2p_beacon_ie = NULL;
wpabuf_free(hapd->p2p_probe_resp_ie);
hapd->p2p_probe_resp_ie = NULL;
#endif /* CONFIG_P2P */
if (!hapd->started) {
wpa_printf(MSG_ERROR, "%s: Interface %s wasn't started",
__func__, hapd->conf->iface);
return;
}
hapd->started = 0;
wpa_printf(MSG_DEBUG, "%s(%s)", __func__, hapd->conf->iface);
iapp_deinit(hapd->iapp);
hapd->iapp = NULL;
accounting_deinit(hapd);
hostapd_deinit_wpa(hapd);
vlan_deinit(hapd);
hostapd_acl_deinit(hapd);
#ifndef CONFIG_NO_RADIUS
radius_client_deinit(hapd->radius);
hapd->radius = NULL;
radius_das_deinit(hapd->radius_das);
hapd->radius_das = NULL;
#endif /* CONFIG_NO_RADIUS */
hostapd_deinit_wps(hapd);
authsrv_deinit(hapd);
if (hapd->interface_added) {
hapd->interface_added = 0;
if (hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
wpa_printf(MSG_WARNING,
"Failed to remove BSS interface %s",
hapd->conf->iface);
hapd->interface_added = 1;
} else {
/*
* Since this was a dynamically added interface, the
* driver wrapper may have removed its internal instance
* and hapd->drv_priv is not valid anymore.
*/
hapd->drv_priv = NULL;
}
}
wpabuf_free(hapd->time_adv);
#ifdef CONFIG_INTERWORKING
gas_serv_deinit(hapd);
#endif /* CONFIG_INTERWORKING */
bss_load_update_deinit(hapd);
ndisc_snoop_deinit(hapd);
dhcp_snoop_deinit(hapd);
x_snoop_deinit(hapd);
#ifdef CONFIG_SQLITE
bin_clear_free(hapd->tmp_eap_user.identity,
hapd->tmp_eap_user.identity_len);
bin_clear_free(hapd->tmp_eap_user.password,
hapd->tmp_eap_user.password_len);
#endif /* CONFIG_SQLITE */
#ifdef CONFIG_MESH
wpabuf_free(hapd->mesh_pending_auth);
hapd->mesh_pending_auth = NULL;
#endif /* CONFIG_MESH */
}
/**
* hostapd_cleanup - Per-BSS cleanup (deinitialization)
* @hapd: Pointer to BSS data
*
* This function is used to free all per-BSS data structures and resources.
* Most of the modules that are initialized in hostapd_setup_bss() are
* deinitialized here.
*/
static void hostapd_cleanup(struct hostapd_data *hapd)
{
wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s))", __func__, hapd,
hapd->conf->iface);
if (hapd->iface->interfaces &&
hapd->iface->interfaces->ctrl_iface_deinit)
hapd->iface->interfaces->ctrl_iface_deinit(hapd);
hostapd_free_hapd_data(hapd);
}
static void hostapd_cleanup_iface_partial(struct hostapd_iface *iface)
{
wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
#ifdef CONFIG_IEEE80211N
#ifdef NEED_AP_MLME
hostapd_stop_setup_timers(iface);
#endif /* NEED_AP_MLME */
#endif /* CONFIG_IEEE80211N */
hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
iface->hw_features = NULL;
os_free(iface->current_rates);
iface->current_rates = NULL;
os_free(iface->basic_rates);
iface->basic_rates = NULL;
ap_list_deinit(iface);
}
/**
* hostapd_cleanup_iface - Complete per-interface cleanup
* @iface: Pointer to interface data
*
* This function is called after per-BSS data structures are deinitialized
* with hostapd_cleanup().
*/
static void hostapd_cleanup_iface(struct hostapd_iface *iface)
{
wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
hostapd_cleanup_iface_partial(iface);
hostapd_config_free(iface->conf);
iface->conf = NULL;
os_free(iface->config_fname);
os_free(iface->bss);
wpa_printf(MSG_DEBUG, "%s: free iface=%p", __func__, iface);
os_free(iface);
}
static void hostapd_clear_wep(struct hostapd_data *hapd)
{
if (hapd->drv_priv && !hapd->iface->driver_ap_teardown) {
hostapd_set_privacy(hapd, 0);
hostapd_broadcast_wep_clear(hapd);
}
}
static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
{
int i;
hostapd_broadcast_wep_set(hapd);
if (hapd->conf->ssid.wep.default_len) {
hostapd_set_privacy(hapd, 1);
return 0;
}
/*
* When IEEE 802.1X is not enabled, the driver may need to know how to
* set authentication algorithms for static WEP.
*/
hostapd_drv_set_authmode(hapd, hapd->conf->auth_algs);
for (i = 0; i < 4; i++) {
if (hapd->conf->ssid.wep.key[i] &&
hostapd_drv_set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
i == hapd->conf->ssid.wep.idx, NULL, 0,
hapd->conf->ssid.wep.key[i],
hapd->conf->ssid.wep.len[i])) {
wpa_printf(MSG_WARNING, "Could not set WEP "
"encryption.");
return -1;
}
if (hapd->conf->ssid.wep.key[i] &&
i == hapd->conf->ssid.wep.idx)
hostapd_set_privacy(hapd, 1);
}
return 0;
}
static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason)
{
int ret = 0;
u8 addr[ETH_ALEN];
if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL)
return 0;
if (!hapd->iface->driver_ap_teardown) {
wpa_dbg(hapd->msg_ctx, MSG_DEBUG,
"Flushing old station entries");
if (hostapd_flush(hapd)) {
wpa_msg(hapd->msg_ctx, MSG_WARNING,
"Could not connect to kernel driver");
ret = -1;
}
}
wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Deauthenticate all stations");
os_memset(addr, 0xff, ETH_ALEN);
hostapd_drv_sta_deauth(hapd, addr, reason);
hostapd_free_stas(hapd);
return ret;
}
static void hostapd_bss_deinit_no_free(struct hostapd_data *hapd)
{
hostapd_free_stas(hapd);
hostapd_flush_old_stations(hapd, WLAN_REASON_DEAUTH_LEAVING);
hostapd_clear_wep(hapd);
}
/**
* hostapd_validate_bssid_configuration - Validate BSSID configuration
* @iface: Pointer to interface data
* Returns: 0 on success, -1 on failure
*
* This function is used to validate that the configured BSSIDs are valid.
*/
static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
{
u8 mask[ETH_ALEN] = { 0 };
struct hostapd_data *hapd = iface->bss[0];
unsigned int i = iface->conf->num_bss, bits = 0, j;
int auto_addr = 0;
if (hostapd_drv_none(hapd))
return 0;
/* Generate BSSID mask that is large enough to cover the BSSIDs. */
/* Determine the bits necessary to cover the number of BSSIDs. */
for (i--; i; i >>= 1)
bits++;
/* Determine the bits necessary to any configured BSSIDs,
if they are higher than the number of BSSIDs. */
for (j = 0; j < iface->conf->num_bss; j++) {
if (hostapd_mac_comp_empty(iface->conf->bss[j]->bssid) == 0) {
if (j)
auto_addr++;
continue;
}
for (i = 0; i < ETH_ALEN; i++) {
mask[i] |=
iface->conf->bss[j]->bssid[i] ^
hapd->own_addr[i];
}
}
if (!auto_addr)
goto skip_mask_ext;
for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
;
j = 0;
if (i < ETH_ALEN) {
j = (5 - i) * 8;
while (mask[i] != 0) {
mask[i] >>= 1;
j++;
}
}
if (bits < j)
bits = j;
if (bits > 40) {
wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
bits);
return -1;
}
os_memset(mask, 0xff, ETH_ALEN);
j = bits / 8;
for (i = 5; i > 5 - j; i--)
mask[i] = 0;
j = bits % 8;
while (j--)
mask[i] <<= 1;
skip_mask_ext:
wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
(unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
if (!auto_addr)
return 0;
for (i = 0; i < ETH_ALEN; i++) {
if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
" for start address " MACSTR ".",
MAC2STR(mask), MAC2STR(hapd->own_addr));
wpa_printf(MSG_ERROR, "Start address must be the "
"first address in the block (i.e., addr "
"AND mask == addr).");
return -1;
}
}
return 0;
}
static int mac_in_conf(struct hostapd_config *conf, const void *a)
{
size_t i;
for (i = 0; i < conf->num_bss; i++) {
if (hostapd_mac_comp(conf->bss[i]->bssid, a) == 0) {
return 1;
}
}
return 0;
}
#ifndef CONFIG_NO_RADIUS
static int hostapd_das_nas_mismatch(struct hostapd_data *hapd,
struct radius_das_attrs *attr)
{
if (attr->nas_identifier &&
(!hapd->conf->nas_identifier ||
os_strlen(hapd->conf->nas_identifier) !=
attr->nas_identifier_len ||
os_memcmp(hapd->conf->nas_identifier, attr->nas_identifier,
attr->nas_identifier_len) != 0)) {
wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-Identifier mismatch");
return 1;
}
if (attr->nas_ip_addr &&
(hapd->conf->own_ip_addr.af != AF_INET ||
os_memcmp(&hapd->conf->own_ip_addr.u.v4, attr->nas_ip_addr, 4) !=
0)) {
wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-IP-Address mismatch");
return 1;
}
#ifdef CONFIG_IPV6
if (attr->nas_ipv6_addr &&
(hapd->conf->own_ip_addr.af != AF_INET6 ||
os_memcmp(&hapd->conf->own_ip_addr.u.v6, attr->nas_ipv6_addr, 16)
!= 0)) {
wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-IPv6-Address mismatch");
return 1;
}
#endif /* CONFIG_IPV6 */
return 0;
}
static struct sta_info * hostapd_das_find_sta(struct hostapd_data *hapd,
struct radius_das_attrs *attr,
int *multi)
{
struct sta_info *selected, *sta;
char buf[128];
int num_attr = 0;
int count;
*multi = 0;
for (sta = hapd->sta_list; sta; sta = sta->next)
sta->radius_das_match = 1;
if (attr->sta_addr) {
num_attr++;
sta = ap_get_sta(hapd, attr->sta_addr);
if (!sta) {
wpa_printf(MSG_DEBUG,
"RADIUS DAS: No Calling-Station-Id match");
return NULL;
}
selected = sta;
for (sta = hapd->sta_list; sta; sta = sta->next) {
if (sta != selected)
sta->radius_das_match = 0;
}
wpa_printf(MSG_DEBUG, "RADIUS DAS: Calling-Station-Id match");
}
if (attr->acct_session_id) {
num_attr++;
if (attr->acct_session_id_len != 17) {
wpa_printf(MSG_DEBUG,
"RADIUS DAS: Acct-Session-Id cannot match");
return NULL;
}
count = 0;
for (sta = hapd->sta_list; sta; sta = sta->next) {
if (!sta->radius_das_match)
continue;
os_snprintf(buf, sizeof(buf), "%08X-%08X",
sta->acct_session_id_hi,
sta->acct_session_id_lo);
if (os_memcmp(attr->acct_session_id, buf, 17) != 0)
sta->radius_das_match = 0;
else
count++;
}
if (count == 0) {
wpa_printf(MSG_DEBUG,
"RADIUS DAS: No matches remaining after Acct-Session-Id check");
return NULL;
}
wpa_printf(MSG_DEBUG, "RADIUS DAS: Acct-Session-Id match");
}
if (attr->acct_multi_session_id) {
num_attr++;
if (attr->acct_multi_session_id_len != 17) {
wpa_printf(MSG_DEBUG,
"RADIUS DAS: Acct-Multi-Session-Id cannot match");
return NULL;
}
count = 0;
for (sta = hapd->sta_list; sta; sta = sta->next) {
if (!sta->radius_das_match)
continue;
if (!sta->eapol_sm ||
!sta->eapol_sm->acct_multi_session_id_hi) {
sta->radius_das_match = 0;
continue;
}
os_snprintf(buf, sizeof(buf), "%08X+%08X",
sta->eapol_sm->acct_multi_session_id_hi,
sta->eapol_sm->acct_multi_session_id_lo);
if (os_memcmp(attr->acct_multi_session_id, buf, 17) !=
0)
sta->radius_das_match = 0;
else
count++;
}
if (count == 0) {
wpa_printf(MSG_DEBUG,
"RADIUS DAS: No matches remaining after Acct-Multi-Session-Id check");
return NULL;
}
wpa_printf(MSG_DEBUG,
"RADIUS DAS: Acct-Multi-Session-Id match");
}
if (attr->cui) {
num_attr++;
count = 0;
for (sta = hapd->sta_list; sta; sta = sta->next) {
struct wpabuf *cui;
if (!sta->radius_das_match)
continue;
cui = ieee802_1x_get_radius_cui(sta->eapol_sm);
if (!cui || wpabuf_len(cui) != attr->cui_len ||
os_memcmp(wpabuf_head(cui), attr->cui,
attr->cui_len) != 0)
sta->radius_das_match = 0;
else
count++;
}
if (count == 0) {
wpa_printf(MSG_DEBUG,
"RADIUS DAS: No matches remaining after Chargeable-User-Identity check");
return NULL;
}
wpa_printf(MSG_DEBUG,
"RADIUS DAS: Chargeable-User-Identity match");
}
if (attr->user_name) {
num_attr++;
count = 0;
for (sta = hapd->sta_list; sta; sta = sta->next) {
u8 *identity;
size_t identity_len;
if (!sta->radius_das_match)
continue;
identity = ieee802_1x_get_identity(sta->eapol_sm,
&identity_len);
if (!identity ||
identity_len != attr->user_name_len ||
os_memcmp(identity, attr->user_name, identity_len)
!= 0)
sta->radius_das_match = 0;
else
count++;
}
if (count == 0) {
wpa_printf(MSG_DEBUG,
"RADIUS DAS: No matches remaining after User-Name check");
return NULL;
}
wpa_printf(MSG_DEBUG,
"RADIUS DAS: User-Name match");
}
if (num_attr == 0) {
/*
* In theory, we could match all current associations, but it
* seems safer to just reject requests that do not include any
* session identification attributes.
*/
wpa_printf(MSG_DEBUG,
"RADIUS DAS: No session identification attributes included");
return NULL;
}
selected = NULL;
for (sta = hapd->sta_list; sta; sta = sta->next) {
if (sta->radius_das_match) {
if (selected) {
*multi = 1;
return NULL;
}
selected = sta;
}
}
return selected;
}
static int hostapd_das_disconnect_pmksa(struct hostapd_data *hapd,
struct radius_das_attrs *attr)
{
if (!hapd->wpa_auth)
return -1;
return wpa_auth_radius_das_disconnect_pmksa(hapd->wpa_auth, attr);
}
static enum radius_das_res
hostapd_das_disconnect(void *ctx, struct radius_das_attrs *attr)
{
struct hostapd_data *hapd = ctx;
struct sta_info *sta;
int multi;
if (hostapd_das_nas_mismatch(hapd, attr))
return RADIUS_DAS_NAS_MISMATCH;
sta = hostapd_das_find_sta(hapd, attr, &multi);
if (sta == NULL) {
if (multi) {
wpa_printf(MSG_DEBUG,
"RADIUS DAS: Multiple sessions match - not supported");
return RADIUS_DAS_MULTI_SESSION_MATCH;
}
if (hostapd_das_disconnect_pmksa(hapd, attr) == 0) {
wpa_printf(MSG_DEBUG,
"RADIUS DAS: PMKSA cache entry matched");
return RADIUS_DAS_SUCCESS;
}
wpa_printf(MSG_DEBUG, "RADIUS DAS: No matching session found");
return RADIUS_DAS_SESSION_NOT_FOUND;
}
wpa_printf(MSG_DEBUG, "RADIUS DAS: Found a matching session " MACSTR
" - disconnecting", MAC2STR(sta->addr));
wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
hostapd_drv_sta_deauth(hapd, sta->addr,
WLAN_REASON_PREV_AUTH_NOT_VALID);
ap_sta_deauthenticate(hapd, sta, WLAN_REASON_PREV_AUTH_NOT_VALID);
return RADIUS_DAS_SUCCESS;
}
#endif /* CONFIG_NO_RADIUS */
/**
* hostapd_setup_bss - Per-BSS setup (initialization)
* @hapd: Pointer to BSS data
* @first: Whether this BSS is the first BSS of an interface; -1 = not first,
* but interface may exist
*
* This function is used to initialize all per-BSS data structures and
* resources. This gets called in a loop for each BSS when an interface is
* initialized. Most of the modules that are initialized here will be
* deinitialized in hostapd_cleanup().
*/
static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
{
struct hostapd_bss_config *conf = hapd->conf;
u8 ssid[SSID_MAX_LEN + 1];
int ssid_len, set_ssid;
char force_ifname[IFNAMSIZ];
u8 if_addr[ETH_ALEN];
int flush_old_stations = 1;
wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s), first=%d)",
__func__, hapd, conf->iface, first);
#ifdef EAP_SERVER_TNC
if (conf->tnc && tncs_global_init() < 0) {
wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
return -1;
}
#endif /* EAP_SERVER_TNC */
if (hapd->started) {
wpa_printf(MSG_ERROR, "%s: Interface %s was already started",
__func__, conf->iface);
return -1;
}
hapd->started = 1;
if (!first || first == -1) {
if (hostapd_mac_comp_empty(conf->bssid) == 0) {
/* Allocate the next available BSSID. */
do {
inc_byte_array(hapd->own_addr, ETH_ALEN);
} while (mac_in_conf(hapd->iconf, hapd->own_addr));
} else {
/* Allocate the configured BSSID. */
os_memcpy(hapd->own_addr, conf->bssid, ETH_ALEN);
if (hostapd_mac_comp(hapd->own_addr,
hapd->iface->bss[0]->own_addr) ==
0) {
wpa_printf(MSG_ERROR, "BSS '%s' may not have "
"BSSID set to the MAC address of "
"the radio", conf->iface);
return -1;
}
}
hapd->interface_added = 1;
if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
conf->iface, hapd->own_addr, hapd,
&hapd->drv_priv, force_ifname, if_addr,
conf->bridge[0] ? conf->bridge : NULL,
first == -1)) {
wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
MACSTR ")", MAC2STR(hapd->own_addr));
hapd->interface_added = 0;
return -1;
}
}
if (conf->wmm_enabled < 0)
conf->wmm_enabled = hapd->iconf->ieee80211n;
#ifdef CONFIG_MESH
if (hapd->iface->mconf == NULL)
flush_old_stations = 0;
#endif /* CONFIG_MESH */
if (flush_old_stations)
hostapd_flush_old_stations(hapd,
WLAN_REASON_PREV_AUTH_NOT_VALID);
hostapd_set_privacy(hapd, 0);
hostapd_broadcast_wep_clear(hapd);
if (hostapd_setup_encryption(conf->iface, hapd))
return -1;
/*
* Fetch the SSID from the system and use it or,
* if one was specified in the config file, verify they
* match.
*/
ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
if (ssid_len < 0) {
wpa_printf(MSG_ERROR, "Could not read SSID from system");
return -1;
}
if (conf->ssid.ssid_set) {
/*
* If SSID is specified in the config file and it differs
* from what is being used then force installation of the
* new SSID.
*/
set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
} else {
/*
* No SSID in the config file; just use the one we got
* from the system.
*/
set_ssid = 0;
conf->ssid.ssid_len = ssid_len;
os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
}
if (!hostapd_drv_none(hapd)) {
wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
" and ssid \"%s\"",
conf->iface, MAC2STR(hapd->own_addr),
wpa_ssid_txt(conf->ssid.ssid, conf->ssid.ssid_len));
}
if (hostapd_setup_wpa_psk(conf)) {
wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
return -1;
}
/* Set SSID for the kernel driver (to be used in beacon and probe
* response frames) */
if (set_ssid && hostapd_set_ssid(hapd, conf->ssid.ssid,
conf->ssid.ssid_len)) {
wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
return -1;
}
if (wpa_debug_level <= MSG_MSGDUMP)
conf->radius->msg_dumps = 1;
#ifndef CONFIG_NO_RADIUS
hapd->radius = radius_client_init(hapd, conf->radius);
if (hapd->radius == NULL) {
wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
return -1;
}
if (conf->radius_das_port) {
struct radius_das_conf das_conf;
os_memset(&das_conf, 0, sizeof(das_conf));
das_conf.port = conf->radius_das_port;
das_conf.shared_secret = conf->radius_das_shared_secret;
das_conf.shared_secret_len =
conf->radius_das_shared_secret_len;
das_conf.client_addr = &conf->radius_das_client_addr;
das_conf.time_window = conf->radius_das_time_window;
das_conf.require_event_timestamp =
conf->radius_das_require_event_timestamp;
das_conf.ctx = hapd;
das_conf.disconnect = hostapd_das_disconnect;
hapd->radius_das = radius_das_init(&das_conf);
if (hapd->radius_das == NULL) {
wpa_printf(MSG_ERROR, "RADIUS DAS initialization "
"failed.");
return -1;
}
}
#endif /* CONFIG_NO_RADIUS */
if (hostapd_acl_init(hapd)) {
wpa_printf(MSG_ERROR, "ACL initialization failed.");
return -1;
}
if (hostapd_init_wps(hapd, conf))
return -1;
if (authsrv_init(hapd) < 0)
return -1;
if (ieee802_1x_init(hapd)) {
wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
return -1;
}
if ((conf->wpa || conf->osen) && hostapd_setup_wpa(hapd))
return -1;
if (accounting_init(hapd)) {
wpa_printf(MSG_ERROR, "Accounting initialization failed.");
return -1;
}
if (conf->ieee802_11f &&
(hapd->iapp = iapp_init(hapd, conf->iapp_iface)) == NULL) {
wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
"failed.");
return -1;
}
#ifdef CONFIG_INTERWORKING
if (gas_serv_init(hapd)) {
wpa_printf(MSG_ERROR, "GAS server initialization failed");
return -1;
}
if (conf->qos_map_set_len &&
hostapd_drv_set_qos_map(hapd, conf->qos_map_set,
conf->qos_map_set_len)) {
wpa_printf(MSG_ERROR, "Failed to initialize QoS Map");
return -1;
}
#endif /* CONFIG_INTERWORKING */
if (conf->bss_load_update_period && bss_load_update_init(hapd)) {
wpa_printf(MSG_ERROR, "BSS Load initialization failed");
return -1;
}
if (conf->proxy_arp) {
if (x_snoop_init(hapd)) {
wpa_printf(MSG_ERROR,
"Generic snooping infrastructure initialization failed");
return -1;
}
if (dhcp_snoop_init(hapd)) {
wpa_printf(MSG_ERROR,
"DHCP snooping initialization failed");
return -1;
}
if (ndisc_snoop_init(hapd)) {
wpa_printf(MSG_ERROR,
"Neighbor Discovery snooping initialization failed");
return -1;
}
}
if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
wpa_printf(MSG_ERROR, "VLAN initialization failed.");
return -1;
}
if (!conf->start_disabled && ieee802_11_set_beacon(hapd) < 0)
return -1;
if (hapd->wpa_auth && wpa_init_keys(hapd->wpa_auth) < 0)
return -1;
if (hapd->driver && hapd->driver->set_operstate)
hapd->driver->set_operstate(hapd->drv_priv, 1);
return 0;
}
static void hostapd_tx_queue_params(struct hostapd_iface *iface)
{
struct hostapd_data *hapd = iface->bss[0];
int i;
struct hostapd_tx_queue_params *p;
#ifdef CONFIG_MESH
if (iface->mconf == NULL)
return;
#endif /* CONFIG_MESH */
for (i = 0; i < NUM_TX_QUEUES; i++) {
p = &iface->conf->tx_queue[i];
if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
p->cwmax, p->burst)) {
wpa_printf(MSG_DEBUG, "Failed to set TX queue "
"parameters for queue %d.", i);
/* Continue anyway */
}
}
}
static int hostapd_set_acl_list(struct hostapd_data *hapd,
struct mac_acl_entry *mac_acl,
int n_entries, u8 accept_acl)
{
struct hostapd_acl_params *acl_params;
int i, err;
acl_params = os_zalloc(sizeof(*acl_params) +
(n_entries * sizeof(acl_params->mac_acl[0])));
if (!acl_params)
return -ENOMEM;
for (i = 0; i < n_entries; i++)
os_memcpy(acl_params->mac_acl[i].addr, mac_acl[i].addr,
ETH_ALEN);
acl_params->acl_policy = accept_acl;
acl_params->num_mac_acl = n_entries;
err = hostapd_drv_set_acl(hapd, acl_params);
os_free(acl_params);
return err;
}
static void hostapd_set_acl(struct hostapd_data *hapd)
{
struct hostapd_config *conf = hapd->iconf;
int err;
u8 accept_acl;
if (hapd->iface->drv_max_acl_mac_addrs == 0)
return;
if (conf->bss[0]->macaddr_acl == DENY_UNLESS_ACCEPTED) {
accept_acl = 1;
err = hostapd_set_acl_list(hapd, conf->bss[0]->accept_mac,
conf->bss[0]->num_accept_mac,
accept_acl);
if (err) {
wpa_printf(MSG_DEBUG, "Failed to set accept acl");
return;
}
} else if (conf->bss[0]->macaddr_acl == ACCEPT_UNLESS_DENIED) {
accept_acl = 0;
err = hostapd_set_acl_list(hapd, conf->bss[0]->deny_mac,
conf->bss[0]->num_deny_mac,
accept_acl);
if (err) {
wpa_printf(MSG_DEBUG, "Failed to set deny acl");
return;
}
}
}
static int start_ctrl_iface_bss(struct hostapd_data *hapd)
{
if (!hapd->iface->interfaces ||
!hapd->iface->interfaces->ctrl_iface_init)
return 0;
if (hapd->iface->interfaces->ctrl_iface_init(hapd)) {
wpa_printf(MSG_ERROR,
"Failed to setup control interface for %s",
hapd->conf->iface);
return -1;
}
return 0;
}
static int start_ctrl_iface(struct hostapd_iface *iface)
{
size_t i;
if (!iface->interfaces || !iface->interfaces->ctrl_iface_init)
return 0;
for (i = 0; i < iface->num_bss; i++) {
struct hostapd_data *hapd = iface->bss[i];
if (iface->interfaces->ctrl_iface_init(hapd)) {
wpa_printf(MSG_ERROR,
"Failed to setup control interface for %s",
hapd->conf->iface);
return -1;
}
}
return 0;
}
static void channel_list_update_timeout(void *eloop_ctx, void *timeout_ctx)
{
struct hostapd_iface *iface = eloop_ctx;
if (!iface->wait_channel_update) {
wpa_printf(MSG_INFO, "Channel list update timeout, but interface was not waiting for it");
return;
}
/*
* It is possible that the existing channel list is acceptable, so try
* to proceed.
*/
wpa_printf(MSG_DEBUG, "Channel list update timeout - try to continue anyway");
setup_interface2(iface);
}
void hostapd_channel_list_updated(struct hostapd_iface *iface, int initiator)
{
if (!iface->wait_channel_update || initiator != REGDOM_SET_BY_USER)
return;
wpa_printf(MSG_DEBUG, "Channel list updated - continue setup");
eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
setup_interface2(iface);
}
static int setup_interface(struct hostapd_iface *iface)
{
struct hostapd_data *hapd = iface->bss[0];
size_t i;
/*
* It is possible that setup_interface() is called after the interface
* was disabled etc., in which case driver_ap_teardown is possibly set
* to 1. Clear it here so any other key/station deletion, which is not
* part of a teardown flow, would also call the relevant driver
* callbacks.
*/
iface->driver_ap_teardown = 0;
if (!iface->phy[0]) {
const char *phy = hostapd_drv_get_radio_name(hapd);
if (phy) {
wpa_printf(MSG_DEBUG, "phy: %s", phy);
os_strlcpy(iface->phy, phy, sizeof(iface->phy));
}
}
/*
* Make sure that all BSSes get configured with a pointer to the same
* driver interface.
*/
for (i = 1; i < iface->num_bss; i++) {
iface->bss[i]->driver = hapd->driver;
iface->bss[i]->drv_priv = hapd->drv_priv;
}
if (hostapd_validate_bssid_configuration(iface))
return -1;
/*
* Initialize control interfaces early to allow external monitoring of
* channel setup operations that may take considerable amount of time
* especially for DFS cases.
*/
if (start_ctrl_iface(iface))
return -1;
if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
char country[4], previous_country[4];
hostapd_set_state(iface, HAPD_IFACE_COUNTRY_UPDATE);
if (hostapd_get_country(hapd, previous_country) < 0)
previous_country[0] = '\0';
os_memcpy(country, hapd->iconf->country, 3);
country[3] = '\0';
if (hostapd_set_country(hapd, country) < 0) {
wpa_printf(MSG_ERROR, "Failed to set country code");
return -1;
}
wpa_printf(MSG_DEBUG, "Previous country code %s, new country code %s",
previous_country, country);
if (os_strncmp(previous_country, country, 2) != 0) {
wpa_printf(MSG_DEBUG, "Continue interface setup after channel list update");
iface->wait_channel_update = 1;
eloop_register_timeout(5, 0,
channel_list_update_timeout,
iface, NULL);
return 0;
}
}
return setup_interface2(iface);
}
static int setup_interface2(struct hostapd_iface *iface)
{
iface->wait_channel_update = 0;
if (hostapd_get_hw_features(iface)) {
/* Not all drivers support this yet, so continue without hw
* feature data. */
} else {
int ret = hostapd_select_hw_mode(iface);
if (ret < 0) {
wpa_printf(MSG_ERROR, "Could not select hw_mode and "
"channel. (%d)", ret);
goto fail;
}
if (ret == 1) {
wpa_printf(MSG_DEBUG, "Interface initialization will be completed in a callback (ACS)");
return 0;
}
ret = hostapd_check_ht_capab(iface);
if (ret < 0)
goto fail;
if (ret == 1) {
wpa_printf(MSG_DEBUG, "Interface initialization will "
"be completed in a callback");
return 0;
}
if (iface->conf->ieee80211h)
wpa_printf(MSG_DEBUG, "DFS support is enabled");
}
return hostapd_setup_interface_complete(iface, 0);
fail:
hostapd_set_state(iface, HAPD_IFACE_DISABLED);
wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
if (iface->interfaces && iface->interfaces->terminate_on_error)
eloop_terminate();
return -1;
}
#ifdef CONFIG_FST
static const u8 * fst_hostapd_get_bssid_cb(void *ctx)
{
struct hostapd_data *hapd = ctx;
return hapd->own_addr;
}
static void fst_hostapd_get_channel_info_cb(void *ctx,
enum hostapd_hw_mode *hw_mode,
u8 *channel)
{
struct hostapd_data *hapd = ctx;
*hw_mode = ieee80211_freq_to_chan(hapd->iface->freq, channel);
}
static void fst_hostapd_set_ies_cb(void *ctx, struct wpabuf *fst_ies)
{
struct hostapd_data *hapd = ctx;
if (hapd->iface->fst_ies != fst_ies) {
hapd->iface->fst_ies = fst_ies;
if (ieee802_11_set_beacon(hapd))
wpa_printf(MSG_WARNING, "FST: Cannot set beacon");
}
}
static int fst_hostapd_send_action_cb(void *ctx, const u8 *da,
struct wpabuf *buf)
{
struct hostapd_data *hapd = ctx;
return hostapd_drv_send_action(hapd, hapd->iface->freq, 0, da,
wpabuf_head(buf), wpabuf_len(buf));
}
static const struct wpabuf * fst_hostapd_get_mb_ie_cb(void *ctx, const u8 *addr)
{
struct hostapd_data *hapd = ctx;
struct sta_info *sta = ap_get_sta(hapd, addr);
return sta ? sta->mb_ies : NULL;
}
static void fst_hostapd_update_mb_ie_cb(void *ctx, const u8 *addr,
const u8 *buf, size_t size)
{
struct hostapd_data *hapd = ctx;
struct sta_info *sta = ap_get_sta(hapd, addr);
if (sta) {
struct mb_ies_info info;
if (!mb_ies_info_by_ies(&info, buf, size)) {
wpabuf_free(sta->mb_ies);
sta->mb_ies = mb_ies_by_info(&info);
}
}
}
static const u8 * fst_hostapd_get_sta(struct fst_get_peer_ctx **get_ctx,
Boolean mb_only)
{
struct sta_info *s = (struct sta_info *) *get_ctx;
if (mb_only) {
for (; s && !s->mb_ies; s = s->next)
;
}
if (s) {
*get_ctx = (struct fst_get_peer_ctx *) s->next;
return s->addr;
}
*get_ctx = NULL;
return NULL;
}
static const u8 * fst_hostapd_get_peer_first(void *ctx,
struct fst_get_peer_ctx **get_ctx,
Boolean mb_only)
{
struct hostapd_data *hapd = ctx;
*get_ctx = (struct fst_get_peer_ctx *) hapd->sta_list;
return fst_hostapd_get_sta(get_ctx, mb_only);
}
static const u8 * fst_hostapd_get_peer_next(void *ctx,
struct fst_get_peer_ctx **get_ctx,
Boolean mb_only)
{
return fst_hostapd_get_sta(get_ctx, mb_only);
}
void fst_hostapd_fill_iface_obj(struct hostapd_data *hapd,
struct fst_wpa_obj *iface_obj)
{
iface_obj->ctx = hapd;
iface_obj->get_bssid = fst_hostapd_get_bssid_cb;
iface_obj->get_channel_info = fst_hostapd_get_channel_info_cb;
iface_obj->set_ies = fst_hostapd_set_ies_cb;
iface_obj->send_action = fst_hostapd_send_action_cb;
iface_obj->get_mb_ie = fst_hostapd_get_mb_ie_cb;
iface_obj->update_mb_ie = fst_hostapd_update_mb_ie_cb;
iface_obj->get_peer_first = fst_hostapd_get_peer_first;
iface_obj->get_peer_next = fst_hostapd_get_peer_next;
}
#endif /* CONFIG_FST */
/**
* hostapd_setup_interface_complete - Complete interface setup
*
* This function is called when previous steps in the interface setup has been
* completed. This can also start operations, e.g., DFS, that will require
* additional processing before interface is ready to be enabled. Such
* operations will call this function from eloop callbacks when finished.
*/
int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
{
struct hostapd_data *hapd = iface->bss[0];
size_t j;
u8 *prev_addr;
int delay_apply_cfg = 0;
int res_dfs_offload = 0;
if (err)
goto fail;
wpa_printf(MSG_DEBUG, "Completing interface initialization");
if (iface->conf->channel) {
#ifdef NEED_AP_MLME
int res;
#endif /* NEED_AP_MLME */
iface->freq = hostapd_hw_get_freq(hapd, iface->conf->channel);
wpa_printf(MSG_DEBUG, "Mode: %s Channel: %d "
"Frequency: %d MHz",
hostapd_hw_mode_txt(iface->conf->hw_mode),
iface->conf->channel, iface->freq);
#ifdef NEED_AP_MLME
/* Handle DFS only if it is not offloaded to the driver */
if (!(iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD)) {
/* Check DFS */
res = hostapd_handle_dfs(iface);
if (res <= 0) {
if (res < 0)
goto fail;
return res;
}
} else {
/* If DFS is offloaded to the driver */
res_dfs_offload = hostapd_handle_dfs_offload(iface);
if (res_dfs_offload <= 0) {
if (res_dfs_offload < 0)
goto fail;
} else {
wpa_printf(MSG_DEBUG,
"Proceed with AP/channel setup");
/*
* If this is a DFS channel, move to completing
* AP setup.
*/
if (res_dfs_offload == 1)
goto dfs_offload;
/* Otherwise fall through. */
}
}
#endif /* NEED_AP_MLME */
#ifdef CONFIG_MESH
if (iface->mconf != NULL) {
wpa_printf(MSG_DEBUG,
"%s: Mesh configuration will be applied while joining the mesh network",
iface->bss[0]->conf->iface);
delay_apply_cfg = 1;
}
#endif /* CONFIG_MESH */
if (!delay_apply_cfg &&
hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
hapd->iconf->channel,
hapd->iconf->ieee80211n,
hapd->iconf->ieee80211ac,
hapd->iconf->secondary_channel,
hapd->iconf->vht_oper_chwidth,
hapd->iconf->vht_oper_centr_freq_seg0_idx,
hapd->iconf->vht_oper_centr_freq_seg1_idx)) {
wpa_printf(MSG_ERROR, "Could not set channel for "
"kernel driver");
goto fail;
}
}
if (iface->current_mode) {
if (hostapd_prepare_rates(iface, iface->current_mode)) {
wpa_printf(MSG_ERROR, "Failed to prepare rates "
"table.");
hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
HOSTAPD_LEVEL_WARNING,
"Failed to prepare rates table.");
goto fail;
}
}
if (hapd->iconf->rts_threshold > -1 &&
hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
"kernel driver");
goto fail;
}
if (hapd->iconf->fragm_threshold > -1 &&
hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
"for kernel driver");
goto fail;
}
prev_addr = hapd->own_addr;
for (j = 0; j < iface->num_bss; j++) {
hapd = iface->bss[j];
if (j)
os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
if (hostapd_setup_bss(hapd, j == 0)) {
do {
hapd = iface->bss[j];
hostapd_bss_deinit_no_free(hapd);
hostapd_free_hapd_data(hapd);
} while (j-- > 0);
goto fail;
}
if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
prev_addr = hapd->own_addr;
}
hapd = iface->bss[0];
hostapd_tx_queue_params(iface);
ap_list_init(iface);
hostapd_set_acl(hapd);
if (hostapd_driver_commit(hapd) < 0) {
wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
"configuration", __func__);
goto fail;
}
/*
* WPS UPnP module can be initialized only when the "upnp_iface" is up.
* If "interface" and "upnp_iface" are the same (e.g., non-bridge
* mode), the interface is up only after driver_commit, so initialize
* WPS after driver_commit.
*/
for (j = 0; j < iface->num_bss; j++) {
if (hostapd_init_wps_complete(iface->bss[j]))
goto fail;
}
if ((iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD) &&
!res_dfs_offload) {
/*
* If freq is DFS, and DFS is offloaded to the driver, then wait
* for CAC to complete.
*/
wpa_printf(MSG_DEBUG, "%s: Wait for CAC to complete", __func__);
return res_dfs_offload;
}
#ifdef NEED_AP_MLME
dfs_offload:
#endif /* NEED_AP_MLME */
#ifdef CONFIG_FST
if (hapd->iconf->fst_cfg.group_id[0]) {
struct fst_wpa_obj iface_obj;
fst_hostapd_fill_iface_obj(hapd, &iface_obj);
iface->fst = fst_attach(hapd->conf->iface, hapd->own_addr,
&iface_obj, &hapd->iconf->fst_cfg);
if (!iface->fst) {
wpa_printf(MSG_ERROR, "Could not attach to FST %s",
hapd->iconf->fst_cfg.group_id);
goto fail;
}
}
#endif /* CONFIG_FST */
hostapd_set_state(iface, HAPD_IFACE_ENABLED);
wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_ENABLED);
if (hapd->setup_complete_cb)
hapd->setup_complete_cb(hapd->setup_complete_cb_ctx);
wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
iface->bss[0]->conf->iface);
if (iface->interfaces && iface->interfaces->terminate_on_error > 0)
iface->interfaces->terminate_on_error--;
return 0;
fail:
wpa_printf(MSG_ERROR, "Interface initialization failed");
hostapd_set_state(iface, HAPD_IFACE_DISABLED);
wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
#ifdef CONFIG_FST
if (iface->fst) {
fst_detach(iface->fst);
iface->fst = NULL;
}
#endif /* CONFIG_FST */
if (iface->interfaces && iface->interfaces->terminate_on_error)
eloop_terminate();
return -1;
}
/**
* hostapd_setup_interface - Setup of an interface
* @iface: Pointer to interface data.
* Returns: 0 on success, -1 on failure
*
* Initializes the driver interface, validates the configuration,
* and sets driver parameters based on the configuration.
* Flushes old stations, sets the channel, encryption,
* beacons, and WDS links based on the configuration.
*
* If interface setup requires more time, e.g., to perform HT co-ex scans, ACS,
* or DFS operations, this function returns 0 before such operations have been
* completed. The pending operations are registered into eloop and will be
* completed from eloop callbacks. Those callbacks end up calling
* hostapd_setup_interface_complete() once setup has been completed.
*/
int hostapd_setup_interface(struct hostapd_iface *iface)
{
int ret;
ret = setup_interface(iface);
if (ret) {
wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
iface->bss[0]->conf->iface);
return -1;
}
return 0;
}
/**
* hostapd_alloc_bss_data - Allocate and initialize per-BSS data
* @hapd_iface: Pointer to interface data
* @conf: Pointer to per-interface configuration
* @bss: Pointer to per-BSS configuration for this BSS
* Returns: Pointer to allocated BSS data
*
* This function is used to allocate per-BSS data structure. This data will be
* freed after hostapd_cleanup() is called for it during interface
* deinitialization.
*/
struct hostapd_data *
hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
struct hostapd_config *conf,
struct hostapd_bss_config *bss)
{
struct hostapd_data *hapd;
hapd = os_zalloc(sizeof(*hapd));
if (hapd == NULL)
return NULL;
hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
hapd->iconf = conf;
hapd->conf = bss;
hapd->iface = hapd_iface;
hapd->driver = hapd->iconf->driver;
hapd->ctrl_sock = -1;
return hapd;
}
static void hostapd_bss_deinit(struct hostapd_data *hapd)
{
wpa_printf(MSG_DEBUG, "%s: deinit bss %s", __func__,
hapd->conf->iface);
hostapd_bss_deinit_no_free(hapd);
wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
hostapd_cleanup(hapd);
}
void hostapd_interface_deinit(struct hostapd_iface *iface)
{
int j;
wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
if (iface == NULL)
return;
hostapd_set_state(iface, HAPD_IFACE_DISABLED);
#ifdef CONFIG_IEEE80211N
#ifdef NEED_AP_MLME
hostapd_stop_setup_timers(iface);
eloop_cancel_timeout(ap_ht2040_timeout, iface, NULL);
#endif /* NEED_AP_MLME */
#endif /* CONFIG_IEEE80211N */
eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
iface->wait_channel_update = 0;
#ifdef CONFIG_FST
if (iface->fst) {
fst_detach(iface->fst);
iface->fst = NULL;
}
#endif /* CONFIG_FST */
for (j = iface->num_bss - 1; j >= 0; j--)
hostapd_bss_deinit(iface->bss[j]);
}
void hostapd_interface_free(struct hostapd_iface *iface)
{
size_t j;
wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
for (j = 0; j < iface->num_bss; j++) {
wpa_printf(MSG_DEBUG, "%s: free hapd %p",
__func__, iface->bss[j]);
os_free(iface->bss[j]);
}
hostapd_cleanup_iface(iface);
}
/**
* hostapd_init - Allocate and initialize per-interface data
* @config_file: Path to the configuration file
* Returns: Pointer to the allocated interface data or %NULL on failure
*
* This function is used to allocate main data structures for per-interface
* data. The allocated data buffer will be freed by calling
* hostapd_cleanup_iface().
*/
struct hostapd_iface * hostapd_init(struct hapd_interfaces *interfaces,
const char *config_file)
{
struct hostapd_iface *hapd_iface = NULL;
struct hostapd_config *conf = NULL;
struct hostapd_data *hapd;
size_t i;
hapd_iface = os_zalloc(sizeof(*hapd_iface));
if (hapd_iface == NULL)
goto fail;
hapd_iface->config_fname = os_strdup(config_file);
if (hapd_iface->config_fname == NULL)
goto fail;
conf = interfaces->config_read_cb(hapd_iface->config_fname);
if (conf == NULL)
goto fail;
hapd_iface->conf = conf;
hapd_iface->num_bss = conf->num_bss;
hapd_iface->bss = os_calloc(conf->num_bss,
sizeof(struct hostapd_data *));
if (hapd_iface->bss == NULL)
goto fail;
for (i = 0; i < conf->num_bss; i++) {
hapd = hapd_iface->bss[i] =
hostapd_alloc_bss_data(hapd_iface, conf,
conf->bss[i]);
if (hapd == NULL)
goto fail;
hapd->msg_ctx = hapd;
}
return hapd_iface;
fail:
wpa_printf(MSG_ERROR, "Failed to set up interface with %s",
config_file);
if (conf)
hostapd_config_free(conf);
if (hapd_iface) {
os_free(hapd_iface->config_fname);
os_free(hapd_iface->bss);
wpa_printf(MSG_DEBUG, "%s: free iface %p",
__func__, hapd_iface);
os_free(hapd_iface);
}
return NULL;
}
static int ifname_in_use(struct hapd_interfaces *interfaces, const char *ifname)
{
size_t i, j;
for (i = 0; i < interfaces->count; i++) {
struct hostapd_iface *iface = interfaces->iface[i];
for (j = 0; j < iface->num_bss; j++) {
struct hostapd_data *hapd = iface->bss[j];
if (os_strcmp(ifname, hapd->conf->iface) == 0)
return 1;
}
}
return 0;
}
/**
* hostapd_interface_init_bss - Read configuration file and init BSS data
*
* This function is used to parse configuration file for a BSS. This BSS is
* added to an existing interface sharing the same radio (if any) or a new
* interface is created if this is the first interface on a radio. This
* allocate memory for the BSS. No actual driver operations are started.
*
* This is similar to hostapd_interface_init(), but for a case where the
* configuration is used to add a single BSS instead of all BSSes for a radio.
*/
struct hostapd_iface *
hostapd_interface_init_bss(struct hapd_interfaces *interfaces, const char *phy,
const char *config_fname, int debug)
{
struct hostapd_iface *new_iface = NULL, *iface = NULL;
struct hostapd_data *hapd;
int k;
size_t i, bss_idx;
if (!phy || !*phy)
return NULL;
for (i = 0; i < interfaces->count; i++) {
if (os_strcmp(interfaces->iface[i]->phy, phy) == 0) {
iface = interfaces->iface[i];
break;
}
}
wpa_printf(MSG_INFO, "Configuration file: %s (phy %s)%s",
config_fname, phy, iface ? "" : " --> new PHY");
if (iface) {
struct hostapd_config *conf;
struct hostapd_bss_config **tmp_conf;
struct hostapd_data **tmp_bss;
struct hostapd_bss_config *bss;
const char *ifname;
/* Add new BSS to existing iface */
conf = interfaces->config_read_cb(config_fname);
if (conf == NULL)
return NULL;
if (conf->num_bss > 1) {
wpa_printf(MSG_ERROR, "Multiple BSSes specified in BSS-config");
hostapd_config_free(conf);
return NULL;
}
ifname = conf->bss[0]->iface;
if (ifname[0] != '\0' && ifname_in_use(interfaces, ifname)) {
wpa_printf(MSG_ERROR,
"Interface name %s already in use", ifname);
hostapd_config_free(conf);
return NULL;
}
tmp_conf = os_realloc_array(
iface->conf->bss, iface->conf->num_bss + 1,
sizeof(struct hostapd_bss_config *));
tmp_bss = os_realloc_array(iface->bss, iface->num_bss + 1,
sizeof(struct hostapd_data *));
if (tmp_bss)
iface->bss = tmp_bss;
if (tmp_conf) {
iface->conf->bss = tmp_conf;
iface->conf->last_bss = tmp_conf[0];
}
if (tmp_bss == NULL || tmp_conf == NULL) {
hostapd_config_free(conf);
return NULL;
}
bss = iface->conf->bss[iface->conf->num_bss] = conf->bss[0];
iface->conf->num_bss++;
hapd = hostapd_alloc_bss_data(iface, iface->conf, bss);
if (hapd == NULL) {
iface->conf->num_bss--;
hostapd_config_free(conf);
return NULL;
}
iface->conf->last_bss = bss;
iface->bss[iface->num_bss] = hapd;
hapd->msg_ctx = hapd;
bss_idx = iface->num_bss++;
conf->num_bss--;
conf->bss[0] = NULL;
hostapd_config_free(conf);
} else {
/* Add a new iface with the first BSS */
new_iface = iface = hostapd_init(interfaces, config_fname);
if (!iface)
return NULL;
os_strlcpy(iface->phy, phy, sizeof(iface->phy));
iface->interfaces = interfaces;
bss_idx = 0;
}
for (k = 0; k < debug; k++) {
if (iface->bss[bss_idx]->conf->logger_stdout_level > 0)
iface->bss[bss_idx]->conf->logger_stdout_level--;
}
if (iface->conf->bss[bss_idx]->iface[0] == '\0' &&
!hostapd_drv_none(iface->bss[bss_idx])) {
wpa_printf(MSG_ERROR, "Interface name not specified in %s",
config_fname);
if (new_iface)
hostapd_interface_deinit_free(new_iface);
return NULL;
}
return iface;
}
void hostapd_interface_deinit_free(struct hostapd_iface *iface)
{
const struct wpa_driver_ops *driver;
void *drv_priv;
wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
if (iface == NULL)
return;
wpa_printf(MSG_DEBUG, "%s: num_bss=%u conf->num_bss=%u",
__func__, (unsigned int) iface->num_bss,
(unsigned int) iface->conf->num_bss);
driver = iface->bss[0]->driver;
drv_priv = iface->bss[0]->drv_priv;
hostapd_interface_deinit(iface);
wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
__func__, driver, drv_priv);
if (driver && driver->hapd_deinit && drv_priv) {
driver->hapd_deinit(drv_priv);
iface->bss[0]->drv_priv = NULL;
}
hostapd_interface_free(iface);
}
static void hostapd_deinit_driver(const struct wpa_driver_ops *driver,
void *drv_priv,
struct hostapd_iface *hapd_iface)
{
size_t j;
wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
__func__, driver, drv_priv);
if (driver && driver->hapd_deinit && drv_priv) {
driver->hapd_deinit(drv_priv);
for (j = 0; j < hapd_iface->num_bss; j++) {
wpa_printf(MSG_DEBUG, "%s:bss[%d]->drv_priv=%p",
__func__, (int) j,
hapd_iface->bss[j]->drv_priv);
if (hapd_iface->bss[j]->drv_priv == drv_priv)
hapd_iface->bss[j]->drv_priv = NULL;
}
}
}
int hostapd_enable_iface(struct hostapd_iface *hapd_iface)
{
size_t j;
if (hapd_iface->bss[0]->drv_priv != NULL) {
wpa_printf(MSG_ERROR, "Interface %s already enabled",
hapd_iface->conf->bss[0]->iface);
return -1;
}
wpa_printf(MSG_DEBUG, "Enable interface %s",
hapd_iface->conf->bss[0]->iface);
for (j = 0; j < hapd_iface->num_bss; j++)
hostapd_set_security_params(hapd_iface->conf->bss[j], 1);
if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
wpa_printf(MSG_INFO, "Invalid configuration - cannot enable");
return -1;
}
if (hapd_iface->interfaces == NULL ||
hapd_iface->interfaces->driver_init == NULL ||
hapd_iface->interfaces->driver_init(hapd_iface))
return -1;
if (hostapd_setup_interface(hapd_iface)) {
hostapd_deinit_driver(hapd_iface->bss[0]->driver,
hapd_iface->bss[0]->drv_priv,
hapd_iface);
return -1;
}
return 0;
}
int hostapd_reload_iface(struct hostapd_iface *hapd_iface)
{
size_t j;
wpa_printf(MSG_DEBUG, "Reload interface %s",
hapd_iface->conf->bss[0]->iface);
for (j = 0; j < hapd_iface->num_bss; j++)
hostapd_set_security_params(hapd_iface->conf->bss[j], 1);
if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
wpa_printf(MSG_ERROR, "Updated configuration is invalid");
return -1;
}
hostapd_clear_old(hapd_iface);
for (j = 0; j < hapd_iface->num_bss; j++)
hostapd_reload_bss(hapd_iface->bss[j]);
return 0;
}
int hostapd_disable_iface(struct hostapd_iface *hapd_iface)
{
size_t j;
const struct wpa_driver_ops *driver;
void *drv_priv;
if (hapd_iface == NULL)
return -1;
if (hapd_iface->bss[0]->drv_priv == NULL) {
wpa_printf(MSG_INFO, "Interface %s already disabled",
hapd_iface->conf->bss[0]->iface);
return -1;
}
wpa_msg(hapd_iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
driver = hapd_iface->bss[0]->driver;
drv_priv = hapd_iface->bss[0]->drv_priv;
hapd_iface->driver_ap_teardown =
!!(hapd_iface->drv_flags &
WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
/* same as hostapd_interface_deinit without deinitializing ctrl-iface */
for (j = 0; j < hapd_iface->num_bss; j++) {
struct hostapd_data *hapd = hapd_iface->bss[j];
hostapd_bss_deinit_no_free(hapd);
hostapd_free_hapd_data(hapd);
}
hostapd_deinit_driver(driver, drv_priv, hapd_iface);
/* From hostapd_cleanup_iface: These were initialized in
* hostapd_setup_interface and hostapd_setup_interface_complete
*/
hostapd_cleanup_iface_partial(hapd_iface);
wpa_printf(MSG_DEBUG, "Interface %s disabled",
hapd_iface->bss[0]->conf->iface);
hostapd_set_state(hapd_iface, HAPD_IFACE_DISABLED);
return 0;
}
static struct hostapd_iface *
hostapd_iface_alloc(struct hapd_interfaces *interfaces)
{
struct hostapd_iface **iface, *hapd_iface;
iface = os_realloc_array(interfaces->iface, interfaces->count + 1,
sizeof(struct hostapd_iface *));
if (iface == NULL)
return NULL;
interfaces->iface = iface;
hapd_iface = interfaces->iface[interfaces->count] =
os_zalloc(sizeof(*hapd_iface));
if (hapd_iface == NULL) {
wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
"the interface", __func__);
return NULL;
}
interfaces->count++;
hapd_iface->interfaces = interfaces;
return hapd_iface;
}
static struct hostapd_config *
hostapd_config_alloc(struct hapd_interfaces *interfaces, const char *ifname,
const char *ctrl_iface, const char *driver)
{
struct hostapd_bss_config *bss;
struct hostapd_config *conf;
/* Allocates memory for bss and conf */
conf = hostapd_config_defaults();
if (conf == NULL) {
wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
"configuration", __func__);
return NULL;
}
if (driver) {
int j;
for (j = 0; wpa_drivers[j]; j++) {
if (os_strcmp(driver, wpa_drivers[j]->name) == 0) {
conf->driver = wpa_drivers[j];
goto skip;
}
}
wpa_printf(MSG_ERROR,
"Invalid/unknown driver '%s' - registering the default driver",
driver);
}
conf->driver = wpa_drivers[0];
if (conf->driver == NULL) {
wpa_printf(MSG_ERROR, "No driver wrappers registered!");
hostapd_config_free(conf);
return NULL;
}
skip:
bss = conf->last_bss = conf->bss[0];
os_strlcpy(bss->iface, ifname, sizeof(bss->iface));
bss->ctrl_interface = os_strdup(ctrl_iface);
if (bss->ctrl_interface == NULL) {
hostapd_config_free(conf);
return NULL;
}
/* Reading configuration file skipped, will be done in SET!
* From reading the configuration till the end has to be done in
* SET
*/
return conf;
}
static int hostapd_data_alloc(struct hostapd_iface *hapd_iface,
struct hostapd_config *conf)
{
size_t i;
struct hostapd_data *hapd;
hapd_iface->bss = os_calloc(conf->num_bss,
sizeof(struct hostapd_data *));
if (hapd_iface->bss == NULL)
return -1;
for (i = 0; i < conf->num_bss; i++) {
hapd = hapd_iface->bss[i] =
hostapd_alloc_bss_data(hapd_iface, conf, conf->bss[i]);
if (hapd == NULL) {
while (i > 0) {
i--;
os_free(hapd_iface->bss[i]);
hapd_iface->bss[i] = NULL;
}
os_free(hapd_iface->bss);
hapd_iface->bss = NULL;
return -1;
}
hapd->msg_ctx = hapd;
}
hapd_iface->conf = conf;
hapd_iface->num_bss = conf->num_bss;
return 0;
}
int hostapd_add_iface(struct hapd_interfaces *interfaces, char *buf)
{
struct hostapd_config *conf = NULL;
struct hostapd_iface *hapd_iface = NULL, *new_iface = NULL;
struct hostapd_data *hapd;
char *ptr;
size_t i, j;
const char *conf_file = NULL, *phy_name = NULL;
if (os_strncmp(buf, "bss_config=", 11) == 0) {
char *pos;
phy_name = buf + 11;
pos = os_strchr(phy_name, ':');
if (!pos)
return -1;
*pos++ = '\0';
conf_file = pos;
if (!os_strlen(conf_file))
return -1;
hapd_iface = hostapd_interface_init_bss(interfaces, phy_name,
conf_file, 0);
if (!hapd_iface)
return -1;
for (j = 0; j < interfaces->count; j++) {
if (interfaces->iface[j] == hapd_iface)
break;
}
if (j == interfaces->count) {
struct hostapd_iface **tmp;
tmp = os_realloc_array(interfaces->iface,
interfaces->count + 1,
sizeof(struct hostapd_iface *));
if (!tmp) {
hostapd_interface_deinit_free(hapd_iface);
return -1;
}
interfaces->iface = tmp;
interfaces->iface[interfaces->count++] = hapd_iface;
new_iface = hapd_iface;
}
if (new_iface) {
if (interfaces->driver_init(hapd_iface))
goto fail;
if (hostapd_setup_interface(hapd_iface)) {
hostapd_deinit_driver(
hapd_iface->bss[0]->driver,
hapd_iface->bss[0]->drv_priv,
hapd_iface);
goto fail;
}
} else {
/* Assign new BSS with bss[0]'s driver info */
hapd = hapd_iface->bss[hapd_iface->num_bss - 1];
hapd->driver = hapd_iface->bss[0]->driver;
hapd->drv_priv = hapd_iface->bss[0]->drv_priv;
os_memcpy(hapd->own_addr, hapd_iface->bss[0]->own_addr,
ETH_ALEN);
if (start_ctrl_iface_bss(hapd) < 0 ||
(hapd_iface->state == HAPD_IFACE_ENABLED &&
hostapd_setup_bss(hapd, -1))) {
hostapd_cleanup(hapd);
hapd_iface->bss[hapd_iface->num_bss - 1] = NULL;
hapd_iface->conf->num_bss--;
hapd_iface->num_bss--;
wpa_printf(MSG_DEBUG, "%s: free hapd %p %s",
__func__, hapd, hapd->conf->iface);
hostapd_config_free_bss(hapd->conf);
hapd->conf = NULL;
os_free(hapd);
return -1;
}
}
return 0;
}
ptr = os_strchr(buf, ' ');
if (ptr == NULL)
return -1;
*ptr++ = '\0';
if (os_strncmp(ptr, "config=", 7) == 0)
conf_file = ptr + 7;
for (i = 0; i < interfaces->count; i++) {
if (!os_strcmp(interfaces->iface[i]->conf->bss[0]->iface,
buf)) {
wpa_printf(MSG_INFO, "Cannot add interface - it "
"already exists");
return -1;
}
}
hapd_iface = hostapd_iface_alloc(interfaces);
if (hapd_iface == NULL) {
wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
"for interface", __func__);
goto fail;
}
new_iface = hapd_iface;
if (conf_file && interfaces->config_read_cb) {
conf = interfaces->config_read_cb(conf_file);
if (conf && conf->bss)
os_strlcpy(conf->bss[0]->iface, buf,
sizeof(conf->bss[0]->iface));
} else {
char *driver = os_strchr(ptr, ' ');
if (driver)
*driver++ = '\0';
conf = hostapd_config_alloc(interfaces, buf, ptr, driver);
}
if (conf == NULL || conf->bss == NULL) {
wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
"for configuration", __func__);
goto fail;
}
if (hostapd_data_alloc(hapd_iface, conf) < 0) {
wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
"for hostapd", __func__);
goto fail;
}
conf = NULL;
if (start_ctrl_iface(hapd_iface) < 0)
goto fail;
wpa_printf(MSG_INFO, "Add interface '%s'",
hapd_iface->conf->bss[0]->iface);
return 0;
fail:
if (conf)
hostapd_config_free(conf);
if (hapd_iface) {
if (hapd_iface->bss) {
for (i = 0; i < hapd_iface->num_bss; i++) {
hapd = hapd_iface->bss[i];
if (!hapd)
continue;
if (hapd_iface->interfaces &&
hapd_iface->interfaces->ctrl_iface_deinit)
hapd_iface->interfaces->
ctrl_iface_deinit(hapd);
wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
__func__, hapd_iface->bss[i],
hapd->conf->iface);
hostapd_cleanup(hapd);
os_free(hapd);
hapd_iface->bss[i] = NULL;
}
os_free(hapd_iface->bss);
hapd_iface->bss = NULL;
}
if (new_iface) {
interfaces->count--;
interfaces->iface[interfaces->count] = NULL;
}
hostapd_cleanup_iface(hapd_iface);
}
return -1;
}
static int hostapd_remove_bss(struct hostapd_iface *iface, unsigned int idx)
{
size_t i;
wpa_printf(MSG_INFO, "Remove BSS '%s'", iface->conf->bss[idx]->iface);
/* Remove hostapd_data only if it has already been initialized */
if (idx < iface->num_bss) {
struct hostapd_data *hapd = iface->bss[idx];
hostapd_bss_deinit(hapd);
wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
__func__, hapd, hapd->conf->iface);
hostapd_config_free_bss(hapd->conf);
hapd->conf = NULL;
os_free(hapd);
iface->num_bss--;
for (i = idx; i < iface->num_bss; i++)
iface->bss[i] = iface->bss[i + 1];
} else {
hostapd_config_free_bss(iface->conf->bss[idx]);
iface->conf->bss[idx] = NULL;
}
iface->conf->num_bss--;
for (i = idx; i < iface->conf->num_bss; i++)
iface->conf->bss[i] = iface->conf->bss[i + 1];
return 0;
}
int hostapd_remove_iface(struct hapd_interfaces *interfaces, char *buf)
{
struct hostapd_iface *hapd_iface;
size_t i, j, k = 0;
for (i = 0; i < interfaces->count; i++) {
hapd_iface = interfaces->iface[i];
if (hapd_iface == NULL)
return -1;
if (!os_strcmp(hapd_iface->conf->bss[0]->iface, buf)) {
wpa_printf(MSG_INFO, "Remove interface '%s'", buf);
hapd_iface->driver_ap_teardown =
!!(hapd_iface->drv_flags &
WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
hostapd_interface_deinit_free(hapd_iface);
k = i;
while (k < (interfaces->count - 1)) {
interfaces->iface[k] =
interfaces->iface[k + 1];
k++;
}
interfaces->count--;
return 0;
}
for (j = 0; j < hapd_iface->conf->num_bss; j++) {
if (!os_strcmp(hapd_iface->conf->bss[j]->iface, buf)) {
hapd_iface->driver_ap_teardown =
!(hapd_iface->drv_flags &
WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
return hostapd_remove_bss(hapd_iface, j);
}
}
}
return -1;
}
/**
* hostapd_new_assoc_sta - Notify that a new station associated with the AP
* @hapd: Pointer to BSS data
* @sta: Pointer to the associated STA data
* @reassoc: 1 to indicate this was a re-association; 0 = first association
*
* This function will be called whenever a station associates with the AP. It
* can be called from ieee802_11.c for drivers that export MLME to hostapd and
* from drv_callbacks.c based on driver events for drivers that take care of
* management frames (IEEE 802.11 authentication and association) internally.
*/
void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
int reassoc)
{
if (hapd->tkip_countermeasures) {
hostapd_drv_sta_deauth(hapd, sta->addr,
WLAN_REASON_MICHAEL_MIC_FAILURE);
return;
}
hostapd_prune_associations(hapd, sta->addr);
/* IEEE 802.11F (IAPP) */
if (hapd->conf->ieee802_11f)
iapp_new_station(hapd->iapp, sta);
#ifdef CONFIG_P2P
if (sta->p2p_ie == NULL && !sta->no_p2p_set) {
sta->no_p2p_set = 1;
hapd->num_sta_no_p2p++;
if (hapd->num_sta_no_p2p == 1)
hostapd_p2p_non_p2p_sta_connected(hapd);
}
#endif /* CONFIG_P2P */
/* Start accounting here, if IEEE 802.1X and WPA are not used.
* IEEE 802.1X/WPA code will start accounting after the station has
* been authorized. */
if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen) {
ap_sta_set_authorized(hapd, sta, 1);
os_get_reltime(&sta->connected_time);
accounting_sta_start(hapd, sta);
}
/* Start IEEE 802.1X authentication process for new stations */
ieee802_1x_new_station(hapd, sta);
if (reassoc) {
if (sta->auth_alg != WLAN_AUTH_FT &&
!(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
} else
wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_INACTIVITY_TIMER)) {
wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
"for " MACSTR " (%d seconds - ap_max_inactivity)",
__func__, MAC2STR(sta->addr),
hapd->conf->ap_max_inactivity);
eloop_cancel_timeout(ap_handle_timer, hapd, sta);
eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
ap_handle_timer, hapd, sta);
}
}
const char * hostapd_state_text(enum hostapd_iface_state s)
{
switch (s) {
case HAPD_IFACE_UNINITIALIZED:
return "UNINITIALIZED";
case HAPD_IFACE_DISABLED:
return "DISABLED";
case HAPD_IFACE_COUNTRY_UPDATE:
return "COUNTRY_UPDATE";
case HAPD_IFACE_ACS:
return "ACS";
case HAPD_IFACE_HT_SCAN:
return "HT_SCAN";
case HAPD_IFACE_DFS:
return "DFS";
case HAPD_IFACE_ENABLED:
return "ENABLED";
}
return "UNKNOWN";
}
void hostapd_set_state(struct hostapd_iface *iface, enum hostapd_iface_state s)
{
wpa_printf(MSG_INFO, "%s: interface state %s->%s",
iface->conf->bss[0]->iface, hostapd_state_text(iface->state),
hostapd_state_text(s));
iface->state = s;
}
#ifdef NEED_AP_MLME
static void free_beacon_data(struct beacon_data *beacon)
{
os_free(beacon->head);
beacon->head = NULL;
os_free(beacon->tail);
beacon->tail = NULL;
os_free(beacon->probe_resp);
beacon->probe_resp = NULL;
os_free(beacon->beacon_ies);
beacon->beacon_ies = NULL;
os_free(beacon->proberesp_ies);
beacon->proberesp_ies = NULL;
os_free(beacon->assocresp_ies);
beacon->assocresp_ies = NULL;
}
static int hostapd_build_beacon_data(struct hostapd_data *hapd,
struct beacon_data *beacon)
{
struct wpabuf *beacon_extra, *proberesp_extra, *assocresp_extra;
struct wpa_driver_ap_params params;
int ret;
os_memset(beacon, 0, sizeof(*beacon));
ret = ieee802_11_build_ap_params(hapd, &params);
if (ret < 0)
return ret;
ret = hostapd_build_ap_extra_ies(hapd, &beacon_extra,
&proberesp_extra,
&assocresp_extra);
if (ret)
goto free_ap_params;
ret = -1;
beacon->head = os_malloc(params.head_len);
if (!beacon->head)
goto free_ap_extra_ies;
os_memcpy(beacon->head, params.head, params.head_len);
beacon->head_len = params.head_len;
beacon->tail = os_malloc(params.tail_len);
if (!beacon->tail)
goto free_beacon;
os_memcpy(beacon->tail, params.tail, params.tail_len);
beacon->tail_len = params.tail_len;
if (params.proberesp != NULL) {
beacon->probe_resp = os_malloc(params.proberesp_len);
if (!beacon->probe_resp)
goto free_beacon;
os_memcpy(beacon->probe_resp, params.proberesp,
params.proberesp_len);
beacon->probe_resp_len = params.proberesp_len;
}
/* copy the extra ies */
if (beacon_extra) {
beacon->beacon_ies = os_malloc(wpabuf_len(beacon_extra));
if (!beacon->beacon_ies)
goto free_beacon;
os_memcpy(beacon->beacon_ies,
beacon_extra->buf, wpabuf_len(beacon_extra));
beacon->beacon_ies_len = wpabuf_len(beacon_extra);
}
if (proberesp_extra) {
beacon->proberesp_ies =
os_malloc(wpabuf_len(proberesp_extra));
if (!beacon->proberesp_ies)
goto free_beacon;
os_memcpy(beacon->proberesp_ies, proberesp_extra->buf,
wpabuf_len(proberesp_extra));
beacon->proberesp_ies_len = wpabuf_len(proberesp_extra);
}
if (assocresp_extra) {
beacon->assocresp_ies =
os_malloc(wpabuf_len(assocresp_extra));
if (!beacon->assocresp_ies)
goto free_beacon;
os_memcpy(beacon->assocresp_ies, assocresp_extra->buf,
wpabuf_len(assocresp_extra));
beacon->assocresp_ies_len = wpabuf_len(assocresp_extra);
}
ret = 0;
free_beacon:
/* if the function fails, the caller should not free beacon data */
if (ret)
free_beacon_data(beacon);
free_ap_extra_ies:
hostapd_free_ap_extra_ies(hapd, beacon_extra, proberesp_extra,
assocresp_extra);
free_ap_params:
ieee802_11_free_ap_params(&params);
return ret;
}
/*
* TODO: This flow currently supports only changing frequency within the
* same hw_mode. Any other changes to MAC parameters or provided settings (even
* width) are not supported.
*/
static int hostapd_change_config_freq(struct hostapd_data *hapd,
struct hostapd_config *conf,
struct hostapd_freq_params *params,
struct hostapd_freq_params *old_params)
{
int channel;
if (!params->channel) {
/* check if the new channel is supported by hw */
params->channel = hostapd_hw_get_channel(hapd, params->freq);
}
channel = params->channel;
if (!channel)
return -1;
/* if a pointer to old_params is provided we save previous state */
if (old_params) {
old_params->channel = conf->channel;
old_params->ht_enabled = conf->ieee80211n;
old_params->sec_channel_offset = conf->secondary_channel;
}
conf->channel = channel;
conf->ieee80211n = params->ht_enabled;
conf->secondary_channel = params->sec_channel_offset;
/* TODO: maybe call here hostapd_config_check here? */
return 0;
}
static int hostapd_fill_csa_settings(struct hostapd_data *hapd,
struct csa_settings *settings)
{
struct hostapd_iface *iface = hapd->iface;
struct hostapd_freq_params old_freq;
int ret;
os_memset(&old_freq, 0, sizeof(old_freq));
if (!iface || !iface->freq || hapd->csa_in_progress)
return -1;
ret = hostapd_change_config_freq(iface->bss[0], iface->conf,
&settings->freq_params,
&old_freq);
if (ret)
return ret;
ret = hostapd_build_beacon_data(hapd, &settings->beacon_after);
/* change back the configuration */
hostapd_change_config_freq(iface->bss[0], iface->conf,
&old_freq, NULL);
if (ret)
return ret;
/* set channel switch parameters for csa ie */
hapd->cs_freq_params = settings->freq_params;
hapd->cs_count = settings->cs_count;
hapd->cs_block_tx = settings->block_tx;
ret = hostapd_build_beacon_data(hapd, &settings->beacon_csa);
if (ret) {
free_beacon_data(&settings->beacon_after);
return ret;
}
settings->counter_offset_beacon = hapd->cs_c_off_beacon;
settings->counter_offset_presp = hapd->cs_c_off_proberesp;
return 0;
}
void hostapd_cleanup_cs_params(struct hostapd_data *hapd)
{
os_memset(&hapd->cs_freq_params, 0, sizeof(hapd->cs_freq_params));
hapd->cs_count = 0;
hapd->cs_block_tx = 0;
hapd->cs_c_off_beacon = 0;
hapd->cs_c_off_proberesp = 0;
hapd->csa_in_progress = 0;
}
int hostapd_switch_channel(struct hostapd_data *hapd,
struct csa_settings *settings)
{
int ret;
if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA)) {
wpa_printf(MSG_INFO, "CSA is not supported");
return -1;
}
ret = hostapd_fill_csa_settings(hapd, settings);
if (ret)
return ret;
ret = hostapd_drv_switch_channel(hapd, settings);
free_beacon_data(&settings->beacon_csa);
free_beacon_data(&settings->beacon_after);
if (ret) {
/* if we failed, clean cs parameters */
hostapd_cleanup_cs_params(hapd);
return ret;
}
hapd->csa_in_progress = 1;
return 0;
}
void
hostapd_switch_channel_fallback(struct hostapd_iface *iface,
const struct hostapd_freq_params *freq_params)
{
int vht_seg0_idx = 0, vht_seg1_idx = 0, vht_bw = VHT_CHANWIDTH_USE_HT;
unsigned int i;
wpa_printf(MSG_DEBUG, "Restarting all CSA-related BSSes");
if (freq_params->center_freq1)
vht_seg0_idx = 36 + (freq_params->center_freq1 - 5180) / 5;
if (freq_params->center_freq2)
vht_seg1_idx = 36 + (freq_params->center_freq2 - 5180) / 5;
switch (freq_params->bandwidth) {
case 0:
case 20:
case 40:
vht_bw = VHT_CHANWIDTH_USE_HT;
break;
case 80:
if (freq_params->center_freq2)
vht_bw = VHT_CHANWIDTH_80P80MHZ;
else
vht_bw = VHT_CHANWIDTH_80MHZ;
break;
case 160:
vht_bw = VHT_CHANWIDTH_160MHZ;
break;
default:
wpa_printf(MSG_WARNING, "Unknown CSA bandwidth: %d",
freq_params->bandwidth);
break;
}
iface->freq = freq_params->freq;
iface->conf->channel = freq_params->channel;
iface->conf->secondary_channel = freq_params->sec_channel_offset;
iface->conf->vht_oper_centr_freq_seg0_idx = vht_seg0_idx;
iface->conf->vht_oper_centr_freq_seg1_idx = vht_seg1_idx;
iface->conf->vht_oper_chwidth = vht_bw;
iface->conf->ieee80211n = freq_params->ht_enabled;
iface->conf->ieee80211ac = freq_params->vht_enabled;
/*
* cs_params must not be cleared earlier because the freq_params
* argument may actually point to one of these.
*/
for (i = 0; i < iface->num_bss; i++)
hostapd_cleanup_cs_params(iface->bss[i]);
hostapd_disable_iface(iface);
hostapd_enable_iface(iface);
}
struct hostapd_data * hostapd_get_iface(struct hapd_interfaces *interfaces,
const char *ifname)
{
size_t i, j;
for (i = 0; i < interfaces->count; i++) {
struct hostapd_iface *iface = interfaces->iface[i];
for (j = 0; j < iface->num_bss; j++) {
struct hostapd_data *hapd = iface->bss[j];
if (os_strcmp(ifname, hapd->conf->iface) == 0)
return hapd;
}
}
return NULL;
}
#endif /* NEED_AP_MLME */
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