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WPS: Use same UUID in multi-interface case

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When generating the UUID based on MAC address, share the same UUID
with all interfaces. This fixes a potential issue with concurrent
dualband APs where the UUID needs to be same for PBC to work properly.
This commit is contained in:
Jouni Malinen 2010-09-20 14:28:43 -07:00 committed by Jouni Malinen
parent e64e3d245e
commit e0369e3664
1 changed files with 45 additions and 4 deletions
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47
src/ap/wps_hostapd.c
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@ -499,6 +499,36 @@ static void hostapd_wps_clear_ies(struct hostapd_data *hapd)
}
static int get_uuid_cb(struct hostapd_iface *iface, void *ctx)
{
const u8 **uuid = ctx;
size_t j;
if (iface == NULL)
return 0;
for (j = 0; j < iface->num_bss; j++) {
struct hostapd_data *hapd = iface->bss[j];
if (hapd->wps && !is_nil_uuid(hapd->wps->uuid)) {
*uuid = hapd->wps->uuid;
return 1;
}
}
return 0;
}
static const u8 * get_own_uuid(struct hostapd_iface *iface)
{
const u8 *uuid;
if (iface->for_each_interface == NULL)
return NULL;
uuid = NULL;
iface->for_each_interface(iface->interfaces, get_uuid_cb, &uuid);
return uuid;
}
int hostapd_init_wps(struct hostapd_data *hapd,
struct hostapd_bss_config *conf)
{
@ -522,11 +552,22 @@ int hostapd_init_wps(struct hostapd_data *hapd,
wps->wps_state = hapd->conf->wps_state;
wps->ap_setup_locked = hapd->conf->ap_setup_locked;
if (is_nil_uuid(hapd->conf->uuid)) {
const u8 *uuid;
uuid = get_own_uuid(hapd->iface);
if (uuid) {
os_memcpy(wps->uuid, uuid, UUID_LEN);
wpa_hexdump(MSG_DEBUG, "WPS: Clone UUID from another "
"interface", wps->uuid, UUID_LEN);
} else {
uuid_gen_mac_addr(hapd->own_addr, wps->uuid);
wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC address",
wps->uuid, UUID_LEN);
} else
wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC "
"address", wps->uuid, UUID_LEN);
}
} else {
os_memcpy(wps->uuid, hapd->conf->uuid, UUID_LEN);
wpa_hexdump(MSG_DEBUG, "WPS: Use configured UUID",
wps->uuid, UUID_LEN);
}
wps->ssid_len = hapd->conf->ssid.ssid_len;
os_memcpy(wps->ssid, hapd->conf->ssid.ssid, wps->ssid_len);
wps->ap = 1;