blob: eb2648a3a0a2a48347bc88cd1a73e88747048abb [file] [log] [blame]
/*
* wpa_supplicant - P2P
* Copyright (c) 2009-2010, Atheros Communications
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include "common.h"
#include "eloop.h"
#include "common/ieee802_11_common.h"
#include "common/ieee802_11_defs.h"
#include "common/wpa_ctrl.h"
#include "wps/wps_i.h"
#include "p2p/p2p.h"
#include "ap/hostapd.h"
#include "ap/ap_config.h"
#include "ap/sta_info.h"
#include "ap/ap_drv_ops.h"
#include "ap/p2p_hostapd.h"
#include "eapol_supp/eapol_supp_sm.h"
#include "rsn_supp/wpa.h"
#include "wpa_supplicant_i.h"
#include "driver_i.h"
#include "ap.h"
#include "config_ssid.h"
#include "config.h"
#include "notify.h"
#include "scan.h"
#include "bss.h"
#include "offchannel.h"
#include "wps_supplicant.h"
#include "p2p_supplicant.h"
/*
* How many times to try to scan to find the GO before giving up on join
* request.
*/
#define P2P_MAX_JOIN_SCAN_ATTEMPTS 10
#define P2P_AUTO_PD_SCAN_ATTEMPTS 5
#ifndef P2P_MAX_CLIENT_IDLE
/*
* How many seconds to try to reconnect to the GO when connection in P2P client
* role has been lost.
*/
#define P2P_MAX_CLIENT_IDLE 10
#endif /* P2P_MAX_CLIENT_IDLE */
#ifndef P2P_MAX_INITIAL_CONN_WAIT
/*
* How many seconds to wait for initial 4-way handshake to get completed after
* WPS provisioning step.
*/
#define P2P_MAX_INITIAL_CONN_WAIT 10
#endif /* P2P_MAX_INITIAL_CONN_WAIT */
#ifndef P2P_MAX_INITIAL_CONN_WAIT_GO
/*
* How many seconds to wait for initial 4-way handshake to get completed after
* WPS provisioning step on the GO. This controls the extra time the P2P
* operation is considered to be in progress (e.g., to delay other scans) after
* WPS provisioning has been completed on the GO during group formation.
*/
#define P2P_MAX_INITIAL_CONN_WAIT_GO 10
#endif /* P2P_MAX_INITIAL_CONN_WAIT_GO */
#ifndef P2P_MAX_INITIAL_CONN_WAIT_GO_REINVOKE
/*
* How many seconds to wait for initial 4-way handshake to get completed after
* re-invocation of a persistent group on the GO when the client is expected
* to connect automatically (no user interaction).
*/
#define P2P_MAX_INITIAL_CONN_WAIT_GO_REINVOKE 15
#endif /* P2P_MAX_INITIAL_CONN_WAIT_GO_REINVOKE */
#ifndef P2P_CONCURRENT_SEARCH_DELAY
#define P2P_CONCURRENT_SEARCH_DELAY 500
#endif /* P2P_CONCURRENT_SEARCH_DELAY */
#define P2P_MGMT_DEVICE_PREFIX "p2p-dev-"
enum p2p_group_removal_reason {
P2P_GROUP_REMOVAL_UNKNOWN,
P2P_GROUP_REMOVAL_SILENT,
P2P_GROUP_REMOVAL_FORMATION_FAILED,
P2P_GROUP_REMOVAL_REQUESTED,
P2P_GROUP_REMOVAL_IDLE_TIMEOUT,
P2P_GROUP_REMOVAL_UNAVAILABLE,
P2P_GROUP_REMOVAL_GO_ENDING_SESSION,
P2P_GROUP_REMOVAL_PSK_FAILURE
};
static void wpas_p2p_long_listen_timeout(void *eloop_ctx, void *timeout_ctx);
static struct wpa_supplicant *
wpas_p2p_get_group_iface(struct wpa_supplicant *wpa_s, int addr_allocated,
int go);
static int wpas_p2p_join_start(struct wpa_supplicant *wpa_s);
static void wpas_p2p_join_scan_req(struct wpa_supplicant *wpa_s, int freq);
static void wpas_p2p_join_scan(void *eloop_ctx, void *timeout_ctx);
static int wpas_p2p_join(struct wpa_supplicant *wpa_s, const u8 *iface_addr,
const u8 *dev_addr, enum p2p_wps_method wps_method,
int auto_join);
static int wpas_p2p_create_iface(struct wpa_supplicant *wpa_s);
static void wpas_p2p_cross_connect_setup(struct wpa_supplicant *wpa_s);
static void wpas_p2p_group_idle_timeout(void *eloop_ctx, void *timeout_ctx);
static void wpas_p2p_set_group_idle_timeout(struct wpa_supplicant *wpa_s);
static void wpas_p2p_group_formation_timeout(void *eloop_ctx,
void *timeout_ctx);
static void wpas_p2p_fallback_to_go_neg(struct wpa_supplicant *wpa_s,
int group_added);
static int wpas_p2p_stop_find_oper(struct wpa_supplicant *wpa_s);
/*
* Get the number of concurrent channels that the HW can operate, but that are
* currently not in use by any of the wpa_supplicant interfaces.
*/
static int wpas_p2p_num_unused_channels(struct wpa_supplicant *wpa_s)
{
int *freqs;
int num, unused;
freqs = os_calloc(wpa_s->num_multichan_concurrent, sizeof(int));
if (!freqs)
return -1;
num = get_shared_radio_freqs(wpa_s, freqs,
wpa_s->num_multichan_concurrent);
os_free(freqs);
unused = wpa_s->num_multichan_concurrent - num;
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: num_unused_channels: %d", unused);
return unused;
}
/*
* Get the frequencies that are currently in use by one or more of the virtual
* interfaces, and that are also valid for P2P operation.
*/
static int wpas_p2p_valid_oper_freqs(struct wpa_supplicant *wpa_s,
int *p2p_freqs, unsigned int len)
{
int *freqs;
unsigned int num, i, j;
freqs = os_calloc(wpa_s->num_multichan_concurrent, sizeof(int));
if (!freqs)
return -1;
num = get_shared_radio_freqs(wpa_s, freqs,
wpa_s->num_multichan_concurrent);
os_memset(p2p_freqs, 0, sizeof(int) * len);
for (i = 0, j = 0; i < num && j < len; i++) {
if (p2p_supported_freq(wpa_s->global->p2p, freqs[i]))
p2p_freqs[j++] = freqs[i];
}
os_free(freqs);
dump_freq_array(wpa_s, "valid for P2P", p2p_freqs, j);
return j;
}
static void wpas_p2p_set_own_freq_preference(struct wpa_supplicant *wpa_s,
int freq)
{
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return;
if (wpa_s->parent->conf->p2p_ignore_shared_freq &&
freq > 0 && wpa_s->num_multichan_concurrent > 1 &&
wpas_p2p_num_unused_channels(wpa_s) > 0) {
wpa_printf(MSG_DEBUG, "P2P: Ignore own channel preference %d MHz due to p2p_ignore_shared_freq=1 configuration",
freq);
freq = 0;
}
p2p_set_own_freq_preference(wpa_s->global->p2p, freq);
}
static void wpas_p2p_scan_res_handler(struct wpa_supplicant *wpa_s,
struct wpa_scan_results *scan_res)
{
size_t i;
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return;
wpa_printf(MSG_DEBUG, "P2P: Scan results received (%d BSS)",
(int) scan_res->num);
for (i = 0; i < scan_res->num; i++) {
struct wpa_scan_res *bss = scan_res->res[i];
struct os_time time_tmp_age, entry_ts;
const u8 *ies;
size_t ies_len;
time_tmp_age.sec = bss->age / 1000;
time_tmp_age.usec = (bss->age % 1000) * 1000;
os_time_sub(&scan_res->fetch_time, &time_tmp_age, &entry_ts);
ies = (const u8 *) (bss + 1);
ies_len = bss->ie_len;
if (bss->beacon_ie_len > 0 &&
!wpa_scan_get_vendor_ie(bss, P2P_IE_VENDOR_TYPE) &&
wpa_scan_get_vendor_ie_beacon(bss, P2P_IE_VENDOR_TYPE)) {
wpa_printf(MSG_DEBUG, "P2P: Use P2P IE(s) from Beacon frame since no P2P IE(s) in Probe Response frames received for "
MACSTR, MAC2STR(bss->bssid));
ies = ies + ies_len;
ies_len = bss->beacon_ie_len;
}
if (p2p_scan_res_handler(wpa_s->global->p2p, bss->bssid,
bss->freq, &entry_ts, bss->level,
ies, ies_len) > 0)
break;
}
p2p_scan_res_handled(wpa_s->global->p2p);
}
static int wpas_p2p_scan(void *ctx, enum p2p_scan_type type, int freq,
unsigned int num_req_dev_types,
const u8 *req_dev_types, const u8 *dev_id, u16 pw_id)
{
struct wpa_supplicant *wpa_s = ctx;
struct wpa_supplicant *ifs;
struct wpa_driver_scan_params params;
int ret;
struct wpabuf *wps_ie, *ies;
int social_channels[] = { 2412, 2437, 2462, 0, 0 };
size_t ielen;
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return -1;
for (ifs = wpa_s->global->ifaces; ifs; ifs = ifs->next) {
if (ifs->sta_scan_pending &&
(wpas_scan_scheduled(ifs) || ifs->scanning) &&
wpas_p2p_in_progress(wpa_s) == 2) {
wpa_printf(MSG_DEBUG, "Delaying P2P scan to allow "
"pending station mode scan to be "
"completed on interface %s", ifs->ifname);
wpa_s->global->p2p_cb_on_scan_complete = 1;
wpa_supplicant_req_scan(ifs, 0, 0);
return 1;
}
}
os_memset(&params, 0, sizeof(params));
/* P2P Wildcard SSID */
params.num_ssids = 1;
params.ssids[0].ssid = (u8 *) P2P_WILDCARD_SSID;
params.ssids[0].ssid_len = P2P_WILDCARD_SSID_LEN;
wpa_s->wps->dev.p2p = 1;
wps_ie = wps_build_probe_req_ie(pw_id, &wpa_s->wps->dev,
wpa_s->wps->uuid, WPS_REQ_ENROLLEE,
num_req_dev_types, req_dev_types);
if (wps_ie == NULL)
return -1;
ielen = p2p_scan_ie_buf_len(wpa_s->global->p2p);
ies = wpabuf_alloc(wpabuf_len(wps_ie) + ielen);
if (ies == NULL) {
wpabuf_free(wps_ie);
return -1;
}
wpabuf_put_buf(ies, wps_ie);
wpabuf_free(wps_ie);
p2p_scan_ie(wpa_s->global->p2p, ies, dev_id);
params.p2p_probe = 1;
params.extra_ies = wpabuf_head(ies);
params.extra_ies_len = wpabuf_len(ies);
switch (type) {
case P2P_SCAN_SOCIAL:
params.freqs = social_channels;
break;
case P2P_SCAN_FULL:
break;
case P2P_SCAN_SOCIAL_PLUS_ONE:
social_channels[3] = freq;
params.freqs = social_channels;
break;
}
ret = wpa_drv_scan(wpa_s, &params);
wpabuf_free(ies);
if (ret) {
for (ifs = wpa_s->global->ifaces; ifs; ifs = ifs->next) {
if (ifs->scanning ||
ifs->scan_res_handler == wpas_p2p_scan_res_handler) {
wpa_s->global->p2p_cb_on_scan_complete = 1;
ret = 1;
break;
}
}
} else {
os_get_time(&wpa_s->scan_trigger_time);
wpa_s->scan_res_handler = wpas_p2p_scan_res_handler;
}
return ret;
}
static enum wpa_driver_if_type wpas_p2p_if_type(int p2p_group_interface)
{
switch (p2p_group_interface) {
case P2P_GROUP_INTERFACE_PENDING:
return WPA_IF_P2P_GROUP;
case P2P_GROUP_INTERFACE_GO:
return WPA_IF_P2P_GO;
case P2P_GROUP_INTERFACE_CLIENT:
return WPA_IF_P2P_CLIENT;
}
return WPA_IF_P2P_GROUP;
}
static struct wpa_supplicant * wpas_get_p2p_group(struct wpa_supplicant *wpa_s,
const u8 *ssid,
size_t ssid_len, int *go)
{
struct wpa_ssid *s;
for (wpa_s = wpa_s->global->ifaces; wpa_s; wpa_s = wpa_s->next) {
for (s = wpa_s->conf->ssid; s; s = s->next) {
if (s->disabled != 0 || !s->p2p_group ||
s->ssid_len != ssid_len ||
os_memcmp(ssid, s->ssid, ssid_len) != 0)
continue;
if (s->mode == WPAS_MODE_P2P_GO &&
s != wpa_s->current_ssid)
continue;
if (go)
*go = s->mode == WPAS_MODE_P2P_GO;
return wpa_s;
}
}
return NULL;
}
static int wpas_p2p_group_delete(struct wpa_supplicant *wpa_s,
enum p2p_group_removal_reason removal_reason)
{
struct wpa_ssid *ssid;
char *gtype;
const char *reason;
ssid = wpa_s->current_ssid;
if (ssid == NULL) {
/*
* The current SSID was not known, but there may still be a
* pending P2P group interface waiting for provisioning or a
* P2P group that is trying to reconnect.
*/
ssid = wpa_s->conf->ssid;
while (ssid) {
if (ssid->p2p_group && ssid->disabled != 2)
break;
ssid = ssid->next;
}
if (ssid == NULL &&
wpa_s->p2p_group_interface == NOT_P2P_GROUP_INTERFACE)
{
wpa_printf(MSG_ERROR, "P2P: P2P group interface "
"not found");
return -1;
}
}
if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_GO)
gtype = "GO";
else if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT ||
(ssid && ssid->mode == WPAS_MODE_INFRA)) {
wpa_s->reassociate = 0;
wpa_s->disconnected = 1;
wpa_supplicant_deauthenticate(wpa_s,
WLAN_REASON_DEAUTH_LEAVING);
gtype = "client";
} else
gtype = "GO";
if (wpa_s->cross_connect_in_use) {
wpa_s->cross_connect_in_use = 0;
wpa_msg_global(wpa_s->parent, MSG_INFO,
P2P_EVENT_CROSS_CONNECT_DISABLE "%s %s",
wpa_s->ifname, wpa_s->cross_connect_uplink);
}
switch (removal_reason) {
case P2P_GROUP_REMOVAL_REQUESTED:
reason = " reason=REQUESTED";
break;
case P2P_GROUP_REMOVAL_FORMATION_FAILED:
reason = " reason=FORMATION_FAILED";
break;
case P2P_GROUP_REMOVAL_IDLE_TIMEOUT:
reason = " reason=IDLE";
break;
case P2P_GROUP_REMOVAL_UNAVAILABLE:
reason = " reason=UNAVAILABLE";
break;
case P2P_GROUP_REMOVAL_GO_ENDING_SESSION:
reason = " reason=GO_ENDING_SESSION";
break;
case P2P_GROUP_REMOVAL_PSK_FAILURE:
reason = " reason=PSK_FAILURE";
break;
default:
reason = "";
break;
}
if (removal_reason != P2P_GROUP_REMOVAL_SILENT) {
wpa_msg_global(wpa_s->parent, MSG_INFO,
P2P_EVENT_GROUP_REMOVED "%s %s%s",
wpa_s->ifname, gtype, reason);
}
if (eloop_cancel_timeout(wpas_p2p_group_idle_timeout, wpa_s, NULL) > 0)
wpa_printf(MSG_DEBUG, "P2P: Cancelled P2P group idle timeout");
if (eloop_cancel_timeout(wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL) > 0) {
wpa_printf(MSG_DEBUG, "P2P: Cancelled P2P group formation "
"timeout");
wpa_s->p2p_in_provisioning = 0;
}
/*
* Make sure wait for the first client does not remain active after the
* group has been removed.
*/
wpa_s->global->p2p_go_wait_client.sec = 0;
if (removal_reason != P2P_GROUP_REMOVAL_SILENT && ssid)
wpas_notify_p2p_group_removed(wpa_s, ssid, gtype);
if (wpa_s->p2p_group_interface != NOT_P2P_GROUP_INTERFACE) {
struct wpa_global *global;
char *ifname;
enum wpa_driver_if_type type;
wpa_printf(MSG_DEBUG, "P2P: Remove group interface %s",
wpa_s->ifname);
global = wpa_s->global;
ifname = os_strdup(wpa_s->ifname);
type = wpas_p2p_if_type(wpa_s->p2p_group_interface);
wpa_supplicant_remove_iface(wpa_s->global, wpa_s, 0);
wpa_s = global->ifaces;
if (wpa_s && ifname)
wpa_drv_if_remove(wpa_s, type, ifname);
os_free(ifname);
return 1;
}
if (!wpa_s->p2p_go_group_formation_completed) {
wpa_s->global->p2p_group_formation = NULL;
wpa_s->p2p_in_provisioning = 0;
}
wpa_s->show_group_started = 0;
os_free(wpa_s->go_params);
wpa_s->go_params = NULL;
wpa_printf(MSG_DEBUG, "P2P: Remove temporary group network");
if (ssid && (ssid->p2p_group ||
ssid->mode == WPAS_MODE_P2P_GROUP_FORMATION ||
(ssid->key_mgmt & WPA_KEY_MGMT_WPS))) {
int id = ssid->id;
if (ssid == wpa_s->current_ssid) {
wpa_sm_set_config(wpa_s->wpa, NULL);
eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
wpa_s->current_ssid = NULL;
}
/*
* Networks objects created during any P2P activities are not
* exposed out as they might/will confuse certain non-P2P aware
* applications since these network objects won't behave like
* regular ones.
*
* Likewise, we don't send out network removed signals for such
* network objects.
*/
wpa_config_remove_network(wpa_s->conf, id);
wpa_supplicant_clear_status(wpa_s);
wpa_supplicant_cancel_sched_scan(wpa_s);
wpa_s->sta_scan_pending = 0;
} else {
wpa_printf(MSG_DEBUG, "P2P: Temporary group network not "
"found");
}
if (wpa_s->ap_iface)
wpa_supplicant_ap_deinit(wpa_s);
else
wpa_drv_deinit_p2p_cli(wpa_s);
return 0;
}
static int wpas_p2p_persistent_group(struct wpa_supplicant *wpa_s,
u8 *go_dev_addr,
const u8 *ssid, size_t ssid_len)
{
struct wpa_bss *bss;
const u8 *bssid;
struct wpabuf *p2p;
u8 group_capab;
const u8 *addr;
if (wpa_s->go_params)
bssid = wpa_s->go_params->peer_interface_addr;
else
bssid = wpa_s->bssid;
bss = wpa_bss_get(wpa_s, bssid, ssid, ssid_len);
if (bss == NULL) {
u8 iface_addr[ETH_ALEN];
if (p2p_get_interface_addr(wpa_s->global->p2p, bssid,
iface_addr) == 0)
bss = wpa_bss_get(wpa_s, iface_addr, ssid, ssid_len);
}
if (bss == NULL) {
wpa_printf(MSG_DEBUG, "P2P: Could not figure out whether "
"group is persistent - BSS " MACSTR " not found",
MAC2STR(bssid));
return 0;
}
p2p = wpa_bss_get_vendor_ie_multi(bss, P2P_IE_VENDOR_TYPE);
if (p2p == NULL)
p2p = wpa_bss_get_vendor_ie_multi_beacon(bss,
P2P_IE_VENDOR_TYPE);
if (p2p == NULL) {
wpa_printf(MSG_DEBUG, "P2P: Could not figure out whether "
"group is persistent - BSS " MACSTR
" did not include P2P IE", MAC2STR(bssid));
wpa_hexdump(MSG_DEBUG, "P2P: Probe Response IEs",
(u8 *) (bss + 1), bss->ie_len);
wpa_hexdump(MSG_DEBUG, "P2P: Beacon IEs",
((u8 *) bss + 1) + bss->ie_len,
bss->beacon_ie_len);
return 0;
}
group_capab = p2p_get_group_capab(p2p);
addr = p2p_get_go_dev_addr(p2p);
wpa_printf(MSG_DEBUG, "P2P: Checking whether group is persistent: "
"group_capab=0x%x", group_capab);
if (addr) {
os_memcpy(go_dev_addr, addr, ETH_ALEN);
wpa_printf(MSG_DEBUG, "P2P: GO Device Address " MACSTR,
MAC2STR(addr));
} else
os_memset(go_dev_addr, 0, ETH_ALEN);
wpabuf_free(p2p);
wpa_printf(MSG_DEBUG, "P2P: BSS " MACSTR " group_capab=0x%x "
"go_dev_addr=" MACSTR,
MAC2STR(bssid), group_capab, MAC2STR(go_dev_addr));
return group_capab & P2P_GROUP_CAPAB_PERSISTENT_GROUP;
}
static int wpas_p2p_store_persistent_group(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid,
const u8 *go_dev_addr)
{
struct wpa_ssid *s;
int changed = 0;
wpa_printf(MSG_DEBUG, "P2P: Storing credentials for a persistent "
"group (GO Dev Addr " MACSTR ")", MAC2STR(go_dev_addr));
for (s = wpa_s->conf->ssid; s; s = s->next) {
if (s->disabled == 2 &&
os_memcmp(go_dev_addr, s->bssid, ETH_ALEN) == 0 &&
s->ssid_len == ssid->ssid_len &&
os_memcmp(ssid->ssid, s->ssid, ssid->ssid_len) == 0)
break;
}
if (s) {
wpa_printf(MSG_DEBUG, "P2P: Update existing persistent group "
"entry");
if (ssid->passphrase && !s->passphrase)
changed = 1;
else if (ssid->passphrase && s->passphrase &&
os_strcmp(ssid->passphrase, s->passphrase) != 0)
changed = 1;
} else {
wpa_printf(MSG_DEBUG, "P2P: Create a new persistent group "
"entry");
changed = 1;
s = wpa_config_add_network(wpa_s->conf);
if (s == NULL)
return -1;
/*
* Instead of network_added we emit persistent_group_added
* notification. Also to keep the defense checks in
* persistent_group obj registration method, we set the
* relevant flags in s to designate it as a persistent group.
*/
s->p2p_group = 1;
s->p2p_persistent_group = 1;
wpas_notify_persistent_group_added(wpa_s, s);
wpa_config_set_network_defaults(s);
}
s->p2p_group = 1;
s->p2p_persistent_group = 1;
s->disabled = 2;
s->bssid_set = 1;
os_memcpy(s->bssid, go_dev_addr, ETH_ALEN);
s->mode = ssid->mode;
s->auth_alg = WPA_AUTH_ALG_OPEN;
s->key_mgmt = WPA_KEY_MGMT_PSK;
s->proto = WPA_PROTO_RSN;
s->pairwise_cipher = WPA_CIPHER_CCMP;
s->export_keys = 1;
if (ssid->passphrase) {
os_free(s->passphrase);
s->passphrase = os_strdup(ssid->passphrase);
}
if (ssid->psk_set) {
s->psk_set = 1;
os_memcpy(s->psk, ssid->psk, 32);
}
if (s->passphrase && !s->psk_set)
wpa_config_update_psk(s);
if (s->ssid == NULL || s->ssid_len < ssid->ssid_len) {
os_free(s->ssid);
s->ssid = os_malloc(ssid->ssid_len);
}
if (s->ssid) {
s->ssid_len = ssid->ssid_len;
os_memcpy(s->ssid, ssid->ssid, s->ssid_len);
}
if (ssid->mode == WPAS_MODE_P2P_GO && wpa_s->global->add_psk) {
dl_list_add(&s->psk_list, &wpa_s->global->add_psk->list);
wpa_s->global->add_psk = NULL;
changed = 1;
}
#ifndef CONFIG_NO_CONFIG_WRITE
if (changed && wpa_s->conf->update_config &&
wpa_config_write(wpa_s->confname, wpa_s->conf)) {
wpa_printf(MSG_DEBUG, "P2P: Failed to update configuration");
}
#endif /* CONFIG_NO_CONFIG_WRITE */
return s->id;
}
static void wpas_p2p_add_persistent_group_client(struct wpa_supplicant *wpa_s,
const u8 *addr)
{
struct wpa_ssid *ssid, *s;
u8 *n;
size_t i;
int found = 0;
ssid = wpa_s->current_ssid;
if (ssid == NULL || ssid->mode != WPAS_MODE_P2P_GO ||
!ssid->p2p_persistent_group)
return;
for (s = wpa_s->parent->conf->ssid; s; s = s->next) {
if (s->disabled != 2 || s->mode != WPAS_MODE_P2P_GO)
continue;
if (s->ssid_len == ssid->ssid_len &&
os_memcmp(s->ssid, ssid->ssid, s->ssid_len) == 0)
break;
}
if (s == NULL)
return;
for (i = 0; s->p2p_client_list && i < s->num_p2p_clients; i++) {
if (os_memcmp(s->p2p_client_list + i * ETH_ALEN, addr,
ETH_ALEN) != 0)
continue;
if (i == s->num_p2p_clients - 1)
return; /* already the most recent entry */
/* move the entry to mark it most recent */
os_memmove(s->p2p_client_list + i * ETH_ALEN,
s->p2p_client_list + (i + 1) * ETH_ALEN,
(s->num_p2p_clients - i - 1) * ETH_ALEN);
os_memcpy(s->p2p_client_list +
(s->num_p2p_clients - 1) * ETH_ALEN, addr, ETH_ALEN);
found = 1;
break;
}
if (!found && s->num_p2p_clients < P2P_MAX_STORED_CLIENTS) {
n = os_realloc_array(s->p2p_client_list,
s->num_p2p_clients + 1, ETH_ALEN);
if (n == NULL)
return;
os_memcpy(n + s->num_p2p_clients * ETH_ALEN, addr, ETH_ALEN);
s->p2p_client_list = n;
s->num_p2p_clients++;
} else if (!found) {
/* Not enough room for an additional entry - drop the oldest
* entry */
os_memmove(s->p2p_client_list,
s->p2p_client_list + ETH_ALEN,
(s->num_p2p_clients - 1) * ETH_ALEN);
os_memcpy(s->p2p_client_list +
(s->num_p2p_clients - 1) * ETH_ALEN,
addr, ETH_ALEN);
}
#ifndef CONFIG_NO_CONFIG_WRITE
if (wpa_s->parent->conf->update_config &&
wpa_config_write(wpa_s->parent->confname, wpa_s->parent->conf))
wpa_printf(MSG_DEBUG, "P2P: Failed to update configuration");
#endif /* CONFIG_NO_CONFIG_WRITE */
}
static void wpas_group_formation_completed(struct wpa_supplicant *wpa_s,
int success)
{
struct wpa_ssid *ssid;
const char *ssid_txt;
int client;
int persistent;
u8 go_dev_addr[ETH_ALEN];
int network_id = -1;
/*
* This callback is likely called for the main interface. Update wpa_s
* to use the group interface if a new interface was created for the
* group.
*/
if (wpa_s->global->p2p_group_formation)
wpa_s = wpa_s->global->p2p_group_formation;
if (wpa_s->p2p_go_group_formation_completed) {
wpa_s->global->p2p_group_formation = NULL;
wpa_s->p2p_in_provisioning = 0;
}
if (!success) {
wpa_msg_global(wpa_s->parent, MSG_INFO,
P2P_EVENT_GROUP_FORMATION_FAILURE);
wpas_p2p_group_delete(wpa_s,
P2P_GROUP_REMOVAL_FORMATION_FAILED);
return;
}
wpa_msg_global(wpa_s->parent, MSG_INFO,
P2P_EVENT_GROUP_FORMATION_SUCCESS);
ssid = wpa_s->current_ssid;
if (ssid && ssid->mode == WPAS_MODE_P2P_GROUP_FORMATION) {
ssid->mode = WPAS_MODE_P2P_GO;
p2p_group_notif_formation_done(wpa_s->p2p_group);
wpa_supplicant_ap_mac_addr_filter(wpa_s, NULL);
}
persistent = 0;
if (ssid) {
ssid_txt = wpa_ssid_txt(ssid->ssid, ssid->ssid_len);
client = ssid->mode == WPAS_MODE_INFRA;
if (ssid->mode == WPAS_MODE_P2P_GO) {
persistent = ssid->p2p_persistent_group;
os_memcpy(go_dev_addr, wpa_s->global->p2p_dev_addr,
ETH_ALEN);
} else
persistent = wpas_p2p_persistent_group(wpa_s,
go_dev_addr,
ssid->ssid,
ssid->ssid_len);
} else {
ssid_txt = "";
client = wpa_s->p2p_group_interface ==
P2P_GROUP_INTERFACE_CLIENT;
os_memset(go_dev_addr, 0, ETH_ALEN);
}
wpa_s->show_group_started = 0;
if (client) {
/*
* Indicate event only after successfully completed 4-way
* handshake, i.e., when the interface is ready for data
* packets.
*/
wpa_s->show_group_started = 1;
} else if (ssid && ssid->passphrase == NULL && ssid->psk_set) {
char psk[65];
wpa_snprintf_hex(psk, sizeof(psk), ssid->psk, 32);
wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_GROUP_STARTED
"%s GO ssid=\"%s\" freq=%d psk=%s go_dev_addr="
MACSTR "%s",
wpa_s->ifname, ssid_txt, ssid->frequency, psk,
MAC2STR(go_dev_addr),
persistent ? " [PERSISTENT]" : "");
wpas_p2p_cross_connect_setup(wpa_s);
wpas_p2p_set_group_idle_timeout(wpa_s);
} else {
wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_GROUP_STARTED
"%s GO ssid=\"%s\" freq=%d passphrase=\"%s\" "
"go_dev_addr=" MACSTR "%s",
wpa_s->ifname, ssid_txt,
ssid ? ssid->frequency : 0,
ssid && ssid->passphrase ? ssid->passphrase : "",
MAC2STR(go_dev_addr),
persistent ? " [PERSISTENT]" : "");
wpas_p2p_cross_connect_setup(wpa_s);
wpas_p2p_set_group_idle_timeout(wpa_s);
}
if (persistent)
network_id = wpas_p2p_store_persistent_group(wpa_s->parent,
ssid, go_dev_addr);
else {
os_free(wpa_s->global->add_psk);
wpa_s->global->add_psk = NULL;
}
if (network_id < 0 && ssid)
network_id = ssid->id;
if (!client) {
wpas_notify_p2p_group_started(wpa_s, ssid, network_id, 0);
os_get_time(&wpa_s->global->p2p_go_wait_client);
}
}
static void wpas_p2p_send_action_tx_status(struct wpa_supplicant *wpa_s,
unsigned int freq,
const u8 *dst, const u8 *src,
const u8 *bssid,
const u8 *data, size_t data_len,
enum offchannel_send_action_result
result)
{
enum p2p_send_action_result res = P2P_SEND_ACTION_SUCCESS;
if (wpa_s->global->p2p == NULL || wpa_s->global->p2p_disabled)
return;
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
return;
switch (result) {
case OFFCHANNEL_SEND_ACTION_SUCCESS:
res = P2P_SEND_ACTION_SUCCESS;
break;
case OFFCHANNEL_SEND_ACTION_NO_ACK:
res = P2P_SEND_ACTION_NO_ACK;
break;
case OFFCHANNEL_SEND_ACTION_FAILED:
res = P2P_SEND_ACTION_FAILED;
break;
}
p2p_send_action_cb(wpa_s->global->p2p, freq, dst, src, bssid, res);
if (result != OFFCHANNEL_SEND_ACTION_SUCCESS &&
wpa_s->pending_pd_before_join &&
(os_memcmp(dst, wpa_s->pending_join_dev_addr, ETH_ALEN) == 0 ||
os_memcmp(dst, wpa_s->pending_join_iface_addr, ETH_ALEN) == 0) &&
wpa_s->p2p_fallback_to_go_neg) {
wpa_s->pending_pd_before_join = 0;
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: No ACK for PD Req "
"during p2p_connect-auto");
wpas_p2p_fallback_to_go_neg(wpa_s, 0);
return;
}
}
static int wpas_send_action(void *ctx, unsigned int freq, const u8 *dst,
const u8 *src, const u8 *bssid, const u8 *buf,
size_t len, unsigned int wait_time)
{
struct wpa_supplicant *wpa_s = ctx;
return offchannel_send_action(wpa_s, freq, dst, src, bssid, buf, len,
wait_time,
wpas_p2p_send_action_tx_status, 1);
}
static void wpas_send_action_done(void *ctx)
{
struct wpa_supplicant *wpa_s = ctx;
offchannel_send_action_done(wpa_s);
}
static int wpas_copy_go_neg_results(struct wpa_supplicant *wpa_s,
struct p2p_go_neg_results *params)
{
if (wpa_s->go_params == NULL) {
wpa_s->go_params = os_malloc(sizeof(*params));
if (wpa_s->go_params == NULL)
return -1;
}
os_memcpy(wpa_s->go_params, params, sizeof(*params));
return 0;
}
static void wpas_start_wps_enrollee(struct wpa_supplicant *wpa_s,
struct p2p_go_neg_results *res)
{
wpa_printf(MSG_DEBUG, "P2P: Start WPS Enrollee for peer " MACSTR,
MAC2STR(res->peer_interface_addr));
wpa_hexdump_ascii(MSG_DEBUG, "P2P: Start WPS Enrollee for SSID",
res->ssid, res->ssid_len);
wpa_supplicant_ap_deinit(wpa_s);
wpas_copy_go_neg_results(wpa_s, res);
if (res->wps_method == WPS_PBC)
wpas_wps_start_pbc(wpa_s, res->peer_interface_addr, 1);
else {
u16 dev_pw_id = DEV_PW_DEFAULT;
if (wpa_s->p2p_wps_method == WPS_PIN_KEYPAD)
dev_pw_id = DEV_PW_REGISTRAR_SPECIFIED;
wpas_wps_start_pin(wpa_s, res->peer_interface_addr,
wpa_s->p2p_pin, 1, dev_pw_id);
}
}
static void wpas_p2p_add_psk_list(struct wpa_supplicant *wpa_s,
struct wpa_ssid *ssid)
{
struct wpa_ssid *persistent;
struct psk_list_entry *psk;
struct hostapd_data *hapd;
if (!wpa_s->ap_iface)
return;
persistent = wpas_p2p_get_persistent(wpa_s->parent, NULL, ssid->ssid,
ssid->ssid_len);
if (persistent == NULL)
return;
hapd = wpa_s->ap_iface->bss[0];
dl_list_for_each(psk, &persistent->psk_list, struct psk_list_entry,
list) {
struct hostapd_wpa_psk *hpsk;
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Add persistent group PSK entry for "
MACSTR " psk=%d",
MAC2STR(psk->addr), psk->p2p);
hpsk = os_zalloc(sizeof(*hpsk));
if (hpsk == NULL)
break;
os_memcpy(hpsk->psk, psk->psk, PMK_LEN);
if (psk->p2p)
os_memcpy(hpsk->p2p_dev_addr, psk->addr, ETH_ALEN);
else
os_memcpy(hpsk->addr, psk->addr, ETH_ALEN);
hpsk->next = hapd->conf->ssid.wpa_psk;
hapd->conf->ssid.wpa_psk = hpsk;
}
}
static void p2p_go_configured(void *ctx, void *data)
{
struct wpa_supplicant *wpa_s = ctx;
struct p2p_go_neg_results *params = data;
struct wpa_ssid *ssid;
int network_id = -1;
ssid = wpa_s->current_ssid;
if (ssid && ssid->mode == WPAS_MODE_P2P_GO) {
wpa_printf(MSG_DEBUG, "P2P: Group setup without provisioning");
if (wpa_s->global->p2p_group_formation == wpa_s)
wpa_s->global->p2p_group_formation = NULL;
if (os_strlen(params->passphrase) > 0) {
wpa_msg_global(wpa_s->parent, MSG_INFO,
P2P_EVENT_GROUP_STARTED
"%s GO ssid=\"%s\" freq=%d "
"passphrase=\"%s\" go_dev_addr=" MACSTR
"%s", wpa_s->ifname,
wpa_ssid_txt(ssid->ssid, ssid->ssid_len),
ssid->frequency, params->passphrase,
MAC2STR(wpa_s->global->p2p_dev_addr),
params->persistent_group ?
" [PERSISTENT]" : "");
} else {
char psk[65];
wpa_snprintf_hex(psk, sizeof(psk), params->psk,
sizeof(params->psk));
wpa_msg_global(wpa_s->parent, MSG_INFO,
P2P_EVENT_GROUP_STARTED
"%s GO ssid=\"%s\" freq=%d psk=%s "
"go_dev_addr=" MACSTR "%s",
wpa_s->ifname,
wpa_ssid_txt(ssid->ssid, ssid->ssid_len),
ssid->frequency, psk,
MAC2STR(wpa_s->global->p2p_dev_addr),
params->persistent_group ?
" [PERSISTENT]" : "");
}
os_get_time(&wpa_s->global->p2p_go_wait_client);
if (params->persistent_group) {
network_id = wpas_p2p_store_persistent_group(
wpa_s->parent, ssid,
wpa_s->global->p2p_dev_addr);
wpas_p2p_add_psk_list(wpa_s, ssid);
}
if (network_id < 0)
network_id = ssid->id;
wpas_notify_p2p_group_started(wpa_s, ssid, network_id, 0);
wpas_p2p_cross_connect_setup(wpa_s);
wpas_p2p_set_group_idle_timeout(wpa_s);
if (wpa_s->p2p_first_connection_timeout) {
wpa_dbg(wpa_s, MSG_DEBUG,
"P2P: Start group formation timeout of %d seconds until first data connection on GO",
wpa_s->p2p_first_connection_timeout);
wpa_s->p2p_go_group_formation_completed = 0;
wpa_s->global->p2p_group_formation = wpa_s;
eloop_cancel_timeout(wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL);
eloop_register_timeout(
wpa_s->p2p_first_connection_timeout, 0,
wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL);
}
return;
}
wpa_printf(MSG_DEBUG, "P2P: Setting up WPS for GO provisioning");
if (wpa_supplicant_ap_mac_addr_filter(wpa_s,
params->peer_interface_addr)) {
wpa_printf(MSG_DEBUG, "P2P: Failed to setup MAC address "
"filtering");
return;
}
if (params->wps_method == WPS_PBC)
wpa_supplicant_ap_wps_pbc(wpa_s, params->peer_interface_addr,
params->peer_device_addr);
else if (wpa_s->p2p_pin[0])
wpa_supplicant_ap_wps_pin(wpa_s, params->peer_interface_addr,
wpa_s->p2p_pin, NULL, 0, 0);
os_free(wpa_s->go_params);
wpa_s->go_params = NULL;
}
static void wpas_start_wps_go(struct wpa_supplicant *wpa_s,
struct p2p_go_neg_results *params,
int group_formation)
{
struct wpa_ssid *ssid;
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Starting GO");
if (wpas_copy_go_neg_results(wpa_s, params) < 0) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Could not copy GO Negotiation "
"results");
return;
}
ssid = wpa_config_add_network(wpa_s->conf);
if (ssid == NULL) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Could not add network for GO");
return;
}
wpa_s->show_group_started = 0;
wpa_config_set_network_defaults(ssid);
ssid->temporary = 1;
ssid->p2p_group = 1;
ssid->p2p_persistent_group = params->persistent_group;
ssid->mode = group_formation ? WPAS_MODE_P2P_GROUP_FORMATION :
WPAS_MODE_P2P_GO;
ssid->frequency = params->freq;
ssid->ht40 = params->ht40;
ssid->vht = params->vht;
ssid->ssid = os_zalloc(params->ssid_len + 1);
if (ssid->ssid) {
os_memcpy(ssid->ssid, params->ssid, params->ssid_len);
ssid->ssid_len = params->ssid_len;
}
ssid->auth_alg = WPA_AUTH_ALG_OPEN;
ssid->key_mgmt = WPA_KEY_MGMT_PSK;
ssid->proto = WPA_PROTO_RSN;
ssid->pairwise_cipher = WPA_CIPHER_CCMP;
if (os_strlen(params->passphrase) > 0) {
ssid->passphrase = os_strdup(params->passphrase);
if (ssid->passphrase == NULL) {
wpa_msg_global(wpa_s, MSG_ERROR,
"P2P: Failed to copy passphrase for GO");
wpa_config_remove_network(wpa_s->conf, ssid->id);
return;
}
} else
ssid->passphrase = NULL;
ssid->psk_set = params->psk_set;
if (ssid->psk_set)
os_memcpy(ssid->psk, params->psk, sizeof(ssid->psk));
else if (ssid->passphrase)
wpa_config_update_psk(ssid);
ssid->ap_max_inactivity = wpa_s->parent->conf->p2p_go_max_inactivity;
wpa_s->ap_configured_cb = p2p_go_configured;
wpa_s->ap_configured_cb_ctx = wpa_s;
wpa_s->ap_configured_cb_data = wpa_s->go_params;
wpa_s->connect_without_scan = ssid;
wpa_s->reassociate = 1;
wpa_s->disconnected = 0;
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Request scan (that will be skipped) to "
"start GO)");
wpa_supplicant_req_scan(wpa_s, 0, 0);
}
static void wpas_p2p_clone_config(struct wpa_supplicant *dst,
const struct wpa_supplicant *src)
{
struct wpa_config *d;
const struct wpa_config *s;
d = dst->conf;
s = src->conf;
#define C(n) if (s->n) d->n = os_strdup(s->n)
C(device_name);
C(manufacturer);
C(model_name);
C(model_number);
C(serial_number);
C(config_methods);
#undef C
os_memcpy(d->device_type, s->device_type, WPS_DEV_TYPE_LEN);
os_memcpy(d->sec_device_type, s->sec_device_type,
sizeof(d->sec_device_type));
d->num_sec_device_types = s->num_sec_device_types;
d->p2p_group_idle = s->p2p_group_idle;
d->p2p_intra_bss = s->p2p_intra_bss;
d->persistent_reconnect = s->persistent_reconnect;
d->max_num_sta = s->max_num_sta;
d->pbc_in_m1 = s->pbc_in_m1;
d->ignore_old_scan_res = s->ignore_old_scan_res;
d->beacon_int = s->beacon_int;
d->disassoc_low_ack = s->disassoc_low_ack;
d->disable_scan_offload = s->disable_scan_offload;
}
static void wpas_p2p_get_group_ifname(struct wpa_supplicant *wpa_s,
char *ifname, size_t len)
{
char *ifname_ptr = wpa_s->ifname;
if (os_strncmp(wpa_s->ifname, P2P_MGMT_DEVICE_PREFIX,
os_strlen(P2P_MGMT_DEVICE_PREFIX)) == 0) {
ifname_ptr = os_strrchr(wpa_s->ifname, '-') + 1;
}
os_snprintf(ifname, len, "p2p-%s-%d", ifname_ptr, wpa_s->p2p_group_idx);
if (os_strlen(ifname) >= IFNAMSIZ &&
os_strlen(wpa_s->ifname) < IFNAMSIZ) {
/* Try to avoid going over the IFNAMSIZ length limit */
os_snprintf(ifname, len, "p2p-%d", wpa_s->p2p_group_idx);
}
}
static int wpas_p2p_add_group_interface(struct wpa_supplicant *wpa_s,
enum wpa_driver_if_type type)
{
char ifname[120], force_ifname[120];
if (wpa_s->pending_interface_name[0]) {
wpa_printf(MSG_DEBUG, "P2P: Pending virtual interface exists "
"- skip creation of a new one");
if (is_zero_ether_addr(wpa_s->pending_interface_addr)) {
wpa_printf(MSG_DEBUG, "P2P: Pending virtual address "
"unknown?! ifname='%s'",
wpa_s->pending_interface_name);
return -1;
}
return 0;
}
wpas_p2p_get_group_ifname(wpa_s, ifname, sizeof(ifname));
force_ifname[0] = '\0';
wpa_printf(MSG_DEBUG, "P2P: Create a new interface %s for the group",
ifname);
wpa_s->p2p_group_idx++;
wpa_s->pending_interface_type = type;
if (wpa_drv_if_add(wpa_s, type, ifname, NULL, NULL, force_ifname,
wpa_s->pending_interface_addr, NULL) < 0) {
wpa_printf(MSG_ERROR, "P2P: Failed to create new group "
"interface");
return -1;
}
if (force_ifname[0]) {
wpa_printf(MSG_DEBUG, "P2P: Driver forced interface name %s",
force_ifname);
os_strlcpy(wpa_s->pending_interface_name, force_ifname,
sizeof(wpa_s->pending_interface_name));
} else
os_strlcpy(wpa_s->pending_interface_name, ifname,
sizeof(wpa_s->pending_interface_name));
wpa_printf(MSG_DEBUG, "P2P: Created pending virtual interface %s addr "
MACSTR, wpa_s->pending_interface_name,
MAC2STR(wpa_s->pending_interface_addr));
return 0;
}
static void wpas_p2p_remove_pending_group_interface(
struct wpa_supplicant *wpa_s)
{
if (!wpa_s->pending_interface_name[0] ||
is_zero_ether_addr(wpa_s->pending_interface_addr))
return; /* No pending virtual interface */
wpa_printf(MSG_DEBUG, "P2P: Removing pending group interface %s",
wpa_s->pending_interface_name);
wpa_drv_if_remove(wpa_s, wpa_s->pending_interface_type,
wpa_s->pending_interface_name);
os_memset(wpa_s->pending_interface_addr, 0, ETH_ALEN);
wpa_s->pending_interface_name[0] = '\0';
}
static struct wpa_supplicant *
wpas_p2p_init_group_interface(struct wpa_supplicant *wpa_s, int go)
{
struct wpa_interface iface;
struct wpa_supplicant *group_wpa_s;
if (!wpa_s->pending_interface_name[0]) {
wpa_printf(MSG_ERROR, "P2P: No pending group interface");
if (!wpas_p2p_create_iface(wpa_s))
return NULL;
/*
* Something has forced us to remove the pending interface; try
* to create a new one and hope for the best that we will get
* the same local address.
*/
if (wpas_p2p_add_group_interface(wpa_s, go ? WPA_IF_P2P_GO :
WPA_IF_P2P_CLIENT) < 0)
return NULL;
}
os_memset(&iface, 0, sizeof(iface));
iface.ifname = wpa_s->pending_interface_name;
iface.driver = wpa_s->driver->name;
if (wpa_s->conf->ctrl_interface == NULL &&
wpa_s->parent != wpa_s &&
wpa_s->p2p_mgmt &&
(wpa_s->drv_flags & WPA_DRIVER_FLAGS_DEDICATED_P2P_DEVICE))
iface.ctrl_interface = wpa_s->parent->conf->ctrl_interface;
else
iface.ctrl_interface = wpa_s->conf->ctrl_interface;
iface.driver_param = wpa_s->conf->driver_param;
group_wpa_s = wpa_supplicant_add_iface(wpa_s->global, &iface);
if (group_wpa_s == NULL) {
wpa_printf(MSG_ERROR, "P2P: Failed to create new "
"wpa_supplicant interface");
return NULL;
}
wpa_s->pending_interface_name[0] = '\0';
group_wpa_s->parent = wpa_s;
group_wpa_s->p2p_group_interface = go ? P2P_GROUP_INTERFACE_GO :
P2P_GROUP_INTERFACE_CLIENT;
wpa_s->global->p2p_group_formation = group_wpa_s;
wpas_p2p_clone_config(group_wpa_s, wpa_s);
return group_wpa_s;
}
static void wpas_p2p_group_formation_timeout(void *eloop_ctx,
void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
wpa_printf(MSG_DEBUG, "P2P: Group Formation timed out");
wpas_p2p_group_formation_failed(wpa_s);
}
void wpas_p2p_group_formation_failed(struct wpa_supplicant *wpa_s)
{
eloop_cancel_timeout(wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL);
if (wpa_s->global->p2p)
p2p_group_formation_failed(wpa_s->global->p2p);
else if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
wpa_drv_p2p_group_formation_failed(wpa_s);
wpas_group_formation_completed(wpa_s, 0);
}
void wpas_p2p_ap_setup_failed(struct wpa_supplicant *wpa_s)
{
if (wpa_s->global->p2p_group_formation != wpa_s)
return;
/* Speed up group formation timeout since this cannot succeed */
eloop_cancel_timeout(wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL);
eloop_register_timeout(0, 0, wpas_p2p_group_formation_timeout,
wpa_s->parent, NULL);
}
void wpas_go_neg_completed(void *ctx, struct p2p_go_neg_results *res)
{
struct wpa_supplicant *wpa_s = ctx;
if (wpa_s->off_channel_freq || wpa_s->roc_waiting_drv_freq) {
wpa_drv_cancel_remain_on_channel(wpa_s);
wpa_s->off_channel_freq = 0;
wpa_s->roc_waiting_drv_freq = 0;
}
if (res->status) {
wpa_msg_global(wpa_s, MSG_INFO,
P2P_EVENT_GO_NEG_FAILURE "status=%d",
res->status);
wpas_notify_p2p_go_neg_completed(wpa_s, res);
wpas_p2p_remove_pending_group_interface(wpa_s);
return;
}
if (wpa_s->p2p_go_ht40)
res->ht40 = 1;
if (wpa_s->p2p_go_vht)
res->vht = 1;
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_GO_NEG_SUCCESS "role=%s "
"freq=%d ht40=%d peer_dev=" MACSTR " peer_iface=" MACSTR
" wps_method=%s",
res->role_go ? "GO" : "client", res->freq, res->ht40,
MAC2STR(res->peer_device_addr),
MAC2STR(res->peer_interface_addr),
p2p_wps_method_text(res->wps_method));
wpas_notify_p2p_go_neg_completed(wpa_s, res);
if (res->role_go && wpa_s->p2p_persistent_id >= 0) {
struct wpa_ssid *ssid;
ssid = wpa_config_get_network(wpa_s->conf,
wpa_s->p2p_persistent_id);
if (ssid && ssid->disabled == 2 &&
ssid->mode == WPAS_MODE_P2P_GO && ssid->passphrase) {
size_t len = os_strlen(ssid->passphrase);
wpa_printf(MSG_DEBUG, "P2P: Override passphrase based "
"on requested persistent group");
os_memcpy(res->passphrase, ssid->passphrase, len);
res->passphrase[len] = '\0';
}
}
if (wpa_s->create_p2p_iface) {
struct wpa_supplicant *group_wpa_s =
wpas_p2p_init_group_interface(wpa_s, res->role_go);
if (group_wpa_s == NULL) {
wpas_p2p_remove_pending_group_interface(wpa_s);
return;
}
if (group_wpa_s != wpa_s) {
os_memcpy(group_wpa_s->p2p_pin, wpa_s->p2p_pin,
sizeof(group_wpa_s->p2p_pin));
group_wpa_s->p2p_wps_method = wpa_s->p2p_wps_method;
}
os_memset(wpa_s->pending_interface_addr, 0, ETH_ALEN);
wpa_s->pending_interface_name[0] = '\0';
group_wpa_s->p2p_in_provisioning = 1;
if (res->role_go)
wpas_start_wps_go(group_wpa_s, res, 1);
else
wpas_start_wps_enrollee(group_wpa_s, res);
} else {
wpa_s->p2p_in_provisioning = 1;
wpa_s->global->p2p_group_formation = wpa_s;
if (res->role_go)
wpas_start_wps_go(wpa_s, res, 1);
else
wpas_start_wps_enrollee(ctx, res);
}
wpa_s->p2p_long_listen = 0;
eloop_cancel_timeout(wpas_p2p_long_listen_timeout, wpa_s, NULL);
eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s, NULL);
eloop_register_timeout(15 + res->peer_config_timeout / 100,
(res->peer_config_timeout % 100) * 10000,
wpas_p2p_group_formation_timeout, wpa_s, NULL);
}
void wpas_go_neg_req_rx(void *ctx, const u8 *src, u16 dev_passwd_id)
{
struct wpa_supplicant *wpa_s = ctx;
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_GO_NEG_REQUEST MACSTR
" dev_passwd_id=%u", MAC2STR(src), dev_passwd_id);
wpas_notify_p2p_go_neg_req(wpa_s, src, dev_passwd_id);
}
void wpas_dev_found(void *ctx, const u8 *addr,
const struct p2p_peer_info *info,
int new_device)
{
#ifndef CONFIG_NO_STDOUT_DEBUG
struct wpa_supplicant *wpa_s = ctx;
char devtype[WPS_DEV_TYPE_BUFSIZE];
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_DEVICE_FOUND MACSTR
" p2p_dev_addr=" MACSTR
" pri_dev_type=%s name='%s' config_methods=0x%x "
"dev_capab=0x%x group_capab=0x%x",
MAC2STR(addr), MAC2STR(info->p2p_device_addr),
wps_dev_type_bin2str(info->pri_dev_type, devtype,
sizeof(devtype)),
info->device_name, info->config_methods,
info->dev_capab, info->group_capab);
#endif /* CONFIG_NO_STDOUT_DEBUG */
wpas_notify_p2p_device_found(ctx, info->p2p_device_addr, new_device);
}
static void wpas_dev_lost(void *ctx, const u8 *dev_addr)
{
struct wpa_supplicant *wpa_s = ctx;
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_DEVICE_LOST
"p2p_dev_addr=" MACSTR, MAC2STR(dev_addr));
wpas_notify_p2p_device_lost(wpa_s, dev_addr);
}
static void wpas_find_stopped(void *ctx)
{
struct wpa_supplicant *wpa_s = ctx;
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_FIND_STOPPED);
}
static int wpas_start_listen(void *ctx, unsigned int freq,
unsigned int duration,
const struct wpabuf *probe_resp_ie)
{
struct wpa_supplicant *wpa_s = ctx;
wpa_drv_set_ap_wps_ie(wpa_s, NULL, probe_resp_ie, NULL);
if (wpa_drv_probe_req_report(wpa_s, 1) < 0) {
wpa_printf(MSG_DEBUG, "P2P: Failed to request the driver to "
"report received Probe Request frames");
return -1;
}
wpa_s->pending_listen_freq = freq;
wpa_s->pending_listen_duration = duration;
if (wpa_drv_remain_on_channel(wpa_s, freq, duration) < 0) {
wpa_printf(MSG_DEBUG, "P2P: Failed to request the driver "
"to remain on channel (%u MHz) for Listen "
"state", freq);
wpa_s->pending_listen_freq = 0;
return -1;
}
wpa_s->off_channel_freq = 0;
wpa_s->roc_waiting_drv_freq = freq;
return 0;
}
static void wpas_stop_listen(void *ctx)
{
struct wpa_supplicant *wpa_s = ctx;
if (wpa_s->off_channel_freq || wpa_s->roc_waiting_drv_freq) {
wpa_drv_cancel_remain_on_channel(wpa_s);
wpa_s->off_channel_freq = 0;
wpa_s->roc_waiting_drv_freq = 0;
}
wpa_drv_set_ap_wps_ie(wpa_s, NULL, NULL, NULL);
wpa_drv_probe_req_report(wpa_s, 0);
}
static int wpas_send_probe_resp(void *ctx, const struct wpabuf *buf)
{
struct wpa_supplicant *wpa_s = ctx;
return wpa_drv_send_mlme(wpa_s, wpabuf_head(buf), wpabuf_len(buf), 1);
}
/*
* DNS Header section is used only to calculate compression pointers, so the
* contents of this data does not matter, but the length needs to be reserved
* in the virtual packet.
*/
#define DNS_HEADER_LEN 12
/*
* 27-octet in-memory packet from P2P specification containing two implied
* queries for _tcp.lcoal. PTR IN and _udp.local. PTR IN
*/
#define P2P_SD_IN_MEMORY_LEN 27
static int p2p_sd_dns_uncompress_label(char **upos, char *uend, u8 *start,
u8 **spos, const u8 *end)
{
while (*spos < end) {
u8 val = ((*spos)[0] & 0xc0) >> 6;
int len;
if (val == 1 || val == 2) {
/* These are reserved values in RFC 1035 */
wpa_printf(MSG_DEBUG, "P2P: Invalid domain name "
"sequence starting with 0x%x", val);
return -1;
}
if (val == 3) {
u16 offset;
u8 *spos_tmp;
/* Offset */
if (*spos + 2 > end) {
wpa_printf(MSG_DEBUG, "P2P: No room for full "
"DNS offset field");
return -1;
}
offset = (((*spos)[0] & 0x3f) << 8) | (*spos)[1];
if (offset >= *spos - start) {
wpa_printf(MSG_DEBUG, "P2P: Invalid DNS "
"pointer offset %u", offset);
return -1;
}
(*spos) += 2;
spos_tmp = start + offset;
return p2p_sd_dns_uncompress_label(upos, uend, start,
&spos_tmp,
*spos - 2);
}
/* Label */
len = (*spos)[0] & 0x3f;
if (len == 0)
return 0;
(*spos)++;
if (*spos + len > end) {
wpa_printf(MSG_DEBUG, "P2P: Invalid domain name "
"sequence - no room for label with length "
"%u", len);
return -1;
}
if (*upos + len + 2 > uend)
return -2;
os_memcpy(*upos, *spos, len);
*spos += len;
*upos += len;
(*upos)[0] = '.';
(*upos)++;
(*upos)[0] = '\0';
}
return 0;
}
/* Uncompress domain names per RFC 1035 using the P2P SD in-memory packet.
* Returns -1 on parsing error (invalid input sequence), -2 if output buffer is
* not large enough */
static int p2p_sd_dns_uncompress(char *buf, size_t buf_len, const u8 *msg,
size_t msg_len, size_t offset)
{
/* 27-octet in-memory packet from P2P specification */
const char *prefix = "\x04_tcp\x05local\x00\x00\x0C\x00\x01"
"\x04_udp\xC0\x11\x00\x0C\x00\x01";
u8 *tmp, *end, *spos;
char *upos, *uend;
int ret = 0;
if (buf_len < 2)
return -1;
if (offset > msg_len)
return -1;
tmp = os_malloc(DNS_HEADER_LEN + P2P_SD_IN_MEMORY_LEN + msg_len);
if (tmp == NULL)
return -1;
spos = tmp + DNS_HEADER_LEN + P2P_SD_IN_MEMORY_LEN;
end = spos + msg_len;
spos += offset;
os_memset(tmp, 0, DNS_HEADER_LEN);
os_memcpy(tmp + DNS_HEADER_LEN, prefix, P2P_SD_IN_MEMORY_LEN);
os_memcpy(tmp + DNS_HEADER_LEN + P2P_SD_IN_MEMORY_LEN, msg, msg_len);
upos = buf;
uend = buf + buf_len;
ret = p2p_sd_dns_uncompress_label(&upos, uend, tmp, &spos, end);
if (ret) {
os_free(tmp);
return ret;
}
if (upos == buf) {
upos[0] = '.';
upos[1] = '\0';
} else if (upos[-1] == '.')
upos[-1] = '\0';
os_free(tmp);
return 0;
}
static struct p2p_srv_bonjour *
wpas_p2p_service_get_bonjour(struct wpa_supplicant *wpa_s,
const struct wpabuf *query)
{
struct p2p_srv_bonjour *bsrv;
size_t len;
len = wpabuf_len(query);
dl_list_for_each(bsrv, &wpa_s->global->p2p_srv_bonjour,
struct p2p_srv_bonjour, list) {
if (len == wpabuf_len(bsrv->query) &&
os_memcmp(wpabuf_head(query), wpabuf_head(bsrv->query),
len) == 0)
return bsrv;
}
return NULL;
}
static struct p2p_srv_upnp *
wpas_p2p_service_get_upnp(struct wpa_supplicant *wpa_s, u8 version,
const char *service)
{
struct p2p_srv_upnp *usrv;
dl_list_for_each(usrv, &wpa_s->global->p2p_srv_upnp,
struct p2p_srv_upnp, list) {
if (version == usrv->version &&
os_strcmp(service, usrv->service) == 0)
return usrv;
}
return NULL;
}
static void wpas_sd_add_proto_not_avail(struct wpabuf *resp, u8 srv_proto,
u8 srv_trans_id)
{
u8 *len_pos;
if (wpabuf_tailroom(resp) < 5)
return;
/* Length (to be filled) */
len_pos = wpabuf_put(resp, 2);
wpabuf_put_u8(resp, srv_proto);
wpabuf_put_u8(resp, srv_trans_id);
/* Status Code */
wpabuf_put_u8(resp, P2P_SD_PROTO_NOT_AVAILABLE);
/* Response Data: empty */
WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos - 2);
}
static void wpas_sd_all_bonjour(struct wpa_supplicant *wpa_s,
struct wpabuf *resp, u8 srv_trans_id)
{
struct p2p_srv_bonjour *bsrv;
u8 *len_pos;
wpa_printf(MSG_DEBUG, "P2P: SD Request for all Bonjour services");
if (dl_list_empty(&wpa_s->global->p2p_srv_bonjour)) {
wpa_printf(MSG_DEBUG, "P2P: Bonjour protocol not available");
return;
}
dl_list_for_each(bsrv, &wpa_s->global->p2p_srv_bonjour,
struct p2p_srv_bonjour, list) {
if (wpabuf_tailroom(resp) <
5 + wpabuf_len(bsrv->query) + wpabuf_len(bsrv->resp))
return;
/* Length (to be filled) */
len_pos = wpabuf_put(resp, 2);
wpabuf_put_u8(resp, P2P_SERV_BONJOUR);
wpabuf_put_u8(resp, srv_trans_id);
/* Status Code */
wpabuf_put_u8(resp, P2P_SD_SUCCESS);
wpa_hexdump_ascii(MSG_DEBUG, "P2P: Matching Bonjour service",
wpabuf_head(bsrv->resp),
wpabuf_len(bsrv->resp));
/* Response Data */
wpabuf_put_buf(resp, bsrv->query); /* Key */
wpabuf_put_buf(resp, bsrv->resp); /* Value */
WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos -
2);
}
}
static int match_bonjour_query(struct p2p_srv_bonjour *bsrv, const u8 *query,
size_t query_len)
{
char str_rx[256], str_srv[256];
if (query_len < 3 || wpabuf_len(bsrv->query) < 3)
return 0; /* Too short to include DNS Type and Version */
if (os_memcmp(query + query_len - 3,
wpabuf_head_u8(bsrv->query) + wpabuf_len(bsrv->query) - 3,
3) != 0)
return 0; /* Mismatch in DNS Type or Version */
if (query_len == wpabuf_len(bsrv->query) &&
os_memcmp(query, wpabuf_head(bsrv->query), query_len - 3) == 0)
return 1; /* Binary match */
if (p2p_sd_dns_uncompress(str_rx, sizeof(str_rx), query, query_len - 3,
0))
return 0; /* Failed to uncompress query */
if (p2p_sd_dns_uncompress(str_srv, sizeof(str_srv),
wpabuf_head(bsrv->query),
wpabuf_len(bsrv->query) - 3, 0))
return 0; /* Failed to uncompress service */
return os_strcmp(str_rx, str_srv) == 0;
}
static void wpas_sd_req_bonjour(struct wpa_supplicant *wpa_s,
struct wpabuf *resp, u8 srv_trans_id,
const u8 *query, size_t query_len)
{
struct p2p_srv_bonjour *bsrv;
u8 *len_pos;
int matches = 0;
wpa_hexdump_ascii(MSG_DEBUG, "P2P: SD Request for Bonjour",
query, query_len);
if (dl_list_empty(&wpa_s->global->p2p_srv_bonjour)) {
wpa_printf(MSG_DEBUG, "P2P: Bonjour protocol not available");
wpas_sd_add_proto_not_avail(resp, P2P_SERV_BONJOUR,
srv_trans_id);
return;
}
if (query_len == 0) {
wpas_sd_all_bonjour(wpa_s, resp, srv_trans_id);
return;
}
dl_list_for_each(bsrv, &wpa_s->global->p2p_srv_bonjour,
struct p2p_srv_bonjour, list) {
if (!match_bonjour_query(bsrv, query, query_len))
continue;
if (wpabuf_tailroom(resp) <
5 + query_len + wpabuf_len(bsrv->resp))
return;
matches++;
/* Length (to be filled) */
len_pos = wpabuf_put(resp, 2);
wpabuf_put_u8(resp, P2P_SERV_BONJOUR);
wpabuf_put_u8(resp, srv_trans_id);
/* Status Code */
wpabuf_put_u8(resp, P2P_SD_SUCCESS);
wpa_hexdump_ascii(MSG_DEBUG, "P2P: Matching Bonjour service",
wpabuf_head(bsrv->resp),
wpabuf_len(bsrv->resp));
/* Response Data */
wpabuf_put_data(resp, query, query_len); /* Key */
wpabuf_put_buf(resp, bsrv->resp); /* Value */
WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos - 2);
}
if (matches == 0) {
wpa_printf(MSG_DEBUG, "P2P: Requested Bonjour service not "
"available");
if (wpabuf_tailroom(resp) < 5)
return;
/* Length (to be filled) */
len_pos = wpabuf_put(resp, 2);
wpabuf_put_u8(resp, P2P_SERV_BONJOUR);
wpabuf_put_u8(resp, srv_trans_id);
/* Status Code */
wpabuf_put_u8(resp, P2P_SD_REQUESTED_INFO_NOT_AVAILABLE);
/* Response Data: empty */
WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos -
2);
}
}
static void wpas_sd_all_upnp(struct wpa_supplicant *wpa_s,
struct wpabuf *resp, u8 srv_trans_id)
{
struct p2p_srv_upnp *usrv;
u8 *len_pos;
wpa_printf(MSG_DEBUG, "P2P: SD Request for all UPnP services");
if (dl_list_empty(&wpa_s->global->p2p_srv_upnp)) {
wpa_printf(MSG_DEBUG, "P2P: UPnP protocol not available");
return;
}
dl_list_for_each(usrv, &wpa_s->global->p2p_srv_upnp,
struct p2p_srv_upnp, list) {
if (wpabuf_tailroom(resp) < 5 + 1 + os_strlen(usrv->service))
return;
/* Length (to be filled) */
len_pos = wpabuf_put(resp, 2);
wpabuf_put_u8(resp, P2P_SERV_UPNP);
wpabuf_put_u8(resp, srv_trans_id);
/* Status Code */
wpabuf_put_u8(resp, P2P_SD_SUCCESS);
/* Response Data */
wpabuf_put_u8(resp, usrv->version);
wpa_printf(MSG_DEBUG, "P2P: Matching UPnP Service: %s",
usrv->service);
wpabuf_put_str(resp, usrv->service);
WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos -
2);
}
}
static void wpas_sd_req_upnp(struct wpa_supplicant *wpa_s,
struct wpabuf *resp, u8 srv_trans_id,
const u8 *query, size_t query_len)
{
struct p2p_srv_upnp *usrv;
u8 *len_pos;
u8 version;
char *str;
int count = 0;
wpa_hexdump_ascii(MSG_DEBUG, "P2P: SD Request for UPnP",
query, query_len);
if (dl_list_empty(&wpa_s->global->p2p_srv_upnp)) {
wpa_printf(MSG_DEBUG, "P2P: UPnP protocol not available");
wpas_sd_add_proto_not_avail(resp, P2P_SERV_UPNP,
srv_trans_id);
return;
}
if (query_len == 0) {
wpas_sd_all_upnp(wpa_s, resp, srv_trans_id);
return;
}
if (wpabuf_tailroom(resp) < 5)
return;
/* Length (to be filled) */
len_pos = wpabuf_put(resp, 2);
wpabuf_put_u8(resp, P2P_SERV_UPNP);
wpabuf_put_u8(resp, srv_trans_id);
version = query[0];
str = os_malloc(query_len);
if (str == NULL)
return;
os_memcpy(str, query + 1, query_len - 1);
str[query_len - 1] = '\0';
dl_list_for_each(usrv, &wpa_s->global->p2p_srv_upnp,
struct p2p_srv_upnp, list) {
if (version != usrv->version)
continue;
if (os_strcmp(str, "ssdp:all") != 0 &&
os_strstr(usrv->service, str) == NULL)
continue;
if (wpabuf_tailroom(resp) < 2)
break;
if (count == 0) {
/* Status Code */
wpabuf_put_u8(resp, P2P_SD_SUCCESS);
/* Response Data */
wpabuf_put_u8(resp, version);
} else
wpabuf_put_u8(resp, ',');
count++;
wpa_printf(MSG_DEBUG, "P2P: Matching UPnP Service: %s",
usrv->service);
if (wpabuf_tailroom(resp) < os_strlen(usrv->service))
break;
wpabuf_put_str(resp, usrv->service);
}
os_free(str);
if (count == 0) {
wpa_printf(MSG_DEBUG, "P2P: Requested UPnP service not "
"available");
/* Status Code */
wpabuf_put_u8(resp, P2P_SD_REQUESTED_INFO_NOT_AVAILABLE);
/* Response Data: empty */
}
WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos - 2);
}
#ifdef CONFIG_WIFI_DISPLAY
static void wpas_sd_req_wfd(struct wpa_supplicant *wpa_s,
struct wpabuf *resp, u8 srv_trans_id,
const u8 *query, size_t query_len)
{
const u8 *pos;
u8 role;
u8 *len_pos;
wpa_hexdump(MSG_DEBUG, "P2P: SD Request for WFD", query, query_len);
if (!wpa_s->global->wifi_display) {
wpa_printf(MSG_DEBUG, "P2P: WFD protocol not available");
wpas_sd_add_proto_not_avail(resp, P2P_SERV_WIFI_DISPLAY,
srv_trans_id);
return;
}
if (query_len < 1) {
wpa_printf(MSG_DEBUG, "P2P: Missing WFD Requested Device "
"Role");
return;
}
if (wpabuf_tailroom(resp) < 5)
return;
pos = query;
role = *pos++;
wpa_printf(MSG_DEBUG, "P2P: WSD for device role 0x%x", role);
/* TODO: role specific handling */
/* Length (to be filled) */
len_pos = wpabuf_put(resp, 2);
wpabuf_put_u8(resp, P2P_SERV_WIFI_DISPLAY);
wpabuf_put_u8(resp, srv_trans_id);
wpabuf_put_u8(resp, P2P_SD_SUCCESS); /* Status Code */
while (pos < query + query_len) {
if (*pos < MAX_WFD_SUBELEMS &&
wpa_s->global->wfd_subelem[*pos] &&
wpabuf_tailroom(resp) >=
wpabuf_len(wpa_s->global->wfd_subelem[*pos])) {
wpa_printf(MSG_DEBUG, "P2P: Add WSD response "
"subelement %u", *pos);
wpabuf_put_buf(resp, wpa_s->global->wfd_subelem[*pos]);
}
pos++;
}
WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos - 2);
}
#endif /* CONFIG_WIFI_DISPLAY */
void wpas_sd_request(void *ctx, int freq, const u8 *sa, u8 dialog_token,
u16 update_indic, const u8 *tlvs, size_t tlvs_len)
{
struct wpa_supplicant *wpa_s = ctx;
const u8 *pos = tlvs;
const u8 *end = tlvs + tlvs_len;
const u8 *tlv_end;
u16 slen;
struct wpabuf *resp;
u8 srv_proto, srv_trans_id;
size_t buf_len;
char *buf;
wpa_hexdump(MSG_MSGDUMP, "P2P: Service Discovery Request TLVs",
tlvs, tlvs_len);
buf_len = 2 * tlvs_len + 1;
buf = os_malloc(buf_len);
if (buf) {
wpa_snprintf_hex(buf, buf_len, tlvs, tlvs_len);
wpa_msg_ctrl(wpa_s, MSG_INFO, P2P_EVENT_SERV_DISC_REQ "%d "
MACSTR " %u %u %s",
freq, MAC2STR(sa), dialog_token, update_indic,
buf);
os_free(buf);
}
if (wpa_s->p2p_sd_over_ctrl_iface) {
wpas_notify_p2p_sd_request(wpa_s, freq, sa, dialog_token,
update_indic, tlvs, tlvs_len);
return; /* to be processed by an external program */
}
resp = wpabuf_alloc(10000);
if (resp == NULL)
return;
while (pos + 1 < end) {
wpa_printf(MSG_DEBUG, "P2P: Service Request TLV");
slen = WPA_GET_LE16(pos);
pos += 2;
if (pos + slen > end || slen < 2) {
wpa_printf(MSG_DEBUG, "P2P: Unexpected Query Data "
"length");
wpabuf_free(resp);
return;
}
tlv_end = pos + slen;
srv_proto = *pos++;
wpa_printf(MSG_DEBUG, "P2P: Service Protocol Type %u",
srv_proto);
srv_trans_id = *pos++;
wpa_printf(MSG_DEBUG, "P2P: Service Transaction ID %u",
srv_trans_id);
wpa_hexdump(MSG_MSGDUMP, "P2P: Query Data",
pos, tlv_end - pos);
if (wpa_s->force_long_sd) {
wpa_printf(MSG_DEBUG, "P2P: SD test - force long "
"response");
wpas_sd_all_bonjour(wpa_s, resp, srv_trans_id);
wpas_sd_all_upnp(wpa_s, resp, srv_trans_id);
goto done;
}
switch (srv_proto) {
case P2P_SERV_ALL_SERVICES:
wpa_printf(MSG_DEBUG, "P2P: Service Discovery Request "
"for all services");
if (dl_list_empty(&wpa_s->global->p2p_srv_upnp) &&
dl_list_empty(&wpa_s->global->p2p_srv_bonjour)) {
wpa_printf(MSG_DEBUG, "P2P: No service "
"discovery protocols available");
wpas_sd_add_proto_not_avail(
resp, P2P_SERV_ALL_SERVICES,
srv_trans_id);
break;
}
wpas_sd_all_bonjour(wpa_s, resp, srv_trans_id);
wpas_sd_all_upnp(wpa_s, resp, srv_trans_id);
break;
case P2P_SERV_BONJOUR:
wpas_sd_req_bonjour(wpa_s, resp, srv_trans_id,
pos, tlv_end - pos);
break;
case P2P_SERV_UPNP:
wpas_sd_req_upnp(wpa_s, resp, srv_trans_id,
pos, tlv_end - pos);
break;
#ifdef CONFIG_WIFI_DISPLAY
case P2P_SERV_WIFI_DISPLAY:
wpas_sd_req_wfd(wpa_s, resp, srv_trans_id,
pos, tlv_end - pos);
break;
#endif /* CONFIG_WIFI_DISPLAY */
default:
wpa_printf(MSG_DEBUG, "P2P: Unavailable service "
"protocol %u", srv_proto);
wpas_sd_add_proto_not_avail(resp, srv_proto,
srv_trans_id);
break;
}
pos = tlv_end;
}
done:
wpas_notify_p2p_sd_request(wpa_s, freq, sa, dialog_token,
update_indic, tlvs, tlvs_len);
wpas_p2p_sd_response(wpa_s, freq, sa, dialog_token, resp);
wpabuf_free(resp);
}
void wpas_sd_response(void *ctx, const u8 *sa, u16 update_indic,
const u8 *tlvs, size_t tlvs_len)
{
struct wpa_supplicant *wpa_s = ctx;
const u8 *pos = tlvs;
const u8 *end = tlvs + tlvs_len;
const u8 *tlv_end;
u16 slen;
size_t buf_len;
char *buf;
wpa_hexdump(MSG_MSGDUMP, "P2P: Service Discovery Response TLVs",
tlvs, tlvs_len);
if (tlvs_len > 1500) {
/* TODO: better way for handling this */
wpa_msg_ctrl(wpa_s, MSG_INFO,
P2P_EVENT_SERV_DISC_RESP MACSTR
" %u <long response: %u bytes>",
MAC2STR(sa), update_indic,
(unsigned int) tlvs_len);
} else {
buf_len = 2 * tlvs_len + 1;
buf = os_malloc(buf_len);
if (buf) {
wpa_snprintf_hex(buf, buf_len, tlvs, tlvs_len);
wpa_msg_ctrl(wpa_s, MSG_INFO,
P2P_EVENT_SERV_DISC_RESP MACSTR " %u %s",
MAC2STR(sa), update_indic, buf);
os_free(buf);
}
}
while (pos < end) {
u8 srv_proto, srv_trans_id, status;
wpa_printf(MSG_DEBUG, "P2P: Service Response TLV");
slen = WPA_GET_LE16(pos);
pos += 2;
if (pos + slen > end || slen < 3) {
wpa_printf(MSG_DEBUG, "P2P: Unexpected Response Data "
"length");
return;
}
tlv_end = pos + slen;
srv_proto = *pos++;
wpa_printf(MSG_DEBUG, "P2P: Service Protocol Type %u",
srv_proto);
srv_trans_id = *pos++;
wpa_printf(MSG_DEBUG, "P2P: Service Transaction ID %u",
srv_trans_id);
status = *pos++;
wpa_printf(MSG_DEBUG, "P2P: Status Code ID %u",
status);
wpa_hexdump(MSG_MSGDUMP, "P2P: Response Data",
pos, tlv_end - pos);
pos = tlv_end;
}
wpas_notify_p2p_sd_response(wpa_s, sa, update_indic, tlvs, tlvs_len);
}
u64 wpas_p2p_sd_request(struct wpa_supplicant *wpa_s, const u8 *dst,
const struct wpabuf *tlvs)
{
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
return wpa_drv_p2p_sd_request(wpa_s, dst, tlvs);
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return 0;
return (uintptr_t) p2p_sd_request(wpa_s->global->p2p, dst, tlvs);
}
u64 wpas_p2p_sd_request_upnp(struct wpa_supplicant *wpa_s, const u8 *dst,
u8 version, const char *query)
{
struct wpabuf *tlvs;
u64 ret;
tlvs = wpabuf_alloc(2 + 1 + 1 + 1 + os_strlen(query));
if (tlvs == NULL)
return 0;
wpabuf_put_le16(tlvs, 1 + 1 + 1 + os_strlen(query));
wpabuf_put_u8(tlvs, P2P_SERV_UPNP); /* Service Protocol Type */
wpabuf_put_u8(tlvs, 1); /* Service Transaction ID */
wpabuf_put_u8(tlvs, version);
wpabuf_put_str(tlvs, query);
ret = wpas_p2p_sd_request(wpa_s, dst, tlvs);
wpabuf_free(tlvs);
return ret;
}
#ifdef CONFIG_WIFI_DISPLAY
static u64 wpas_p2p_sd_request_wfd(struct wpa_supplicant *wpa_s, const u8 *dst,
const struct wpabuf *tlvs)
{
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
return 0;
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return 0;
return (uintptr_t) p2p_sd_request_wfd(wpa_s->global->p2p, dst, tlvs);
}
#define MAX_WFD_SD_SUBELEMS 20
static void wfd_add_sd_req_role(struct wpabuf *tlvs, u8 id, u8 role,
const char *subelems)
{
u8 *len;
const char *pos;
int val;
int count = 0;
len = wpabuf_put(tlvs, 2);
wpabuf_put_u8(tlvs, P2P_SERV_WIFI_DISPLAY); /* Service Protocol Type */
wpabuf_put_u8(tlvs, id); /* Service Transaction ID */
wpabuf_put_u8(tlvs, role);
pos = subelems;
while (*pos) {
val = atoi(pos);
if (val >= 0 && val < 256) {
wpabuf_put_u8(tlvs, val);
count++;
if (count == MAX_WFD_SD_SUBELEMS)
break;
}
pos = os_strchr(pos + 1, ',');
if (pos == NULL)
break;
pos++;
}
WPA_PUT_LE16(len, (u8 *) wpabuf_put(tlvs, 0) - len - 2);
}
u64 wpas_p2p_sd_request_wifi_display(struct wpa_supplicant *wpa_s,
const u8 *dst, const char *role)
{
struct wpabuf *tlvs;
u64 ret;
const char *subelems;
u8 id = 1;
subelems = os_strchr(role, ' ');
if (subelems == NULL)
return 0;
subelems++;
tlvs = wpabuf_alloc(4 * (2 + 1 + 1 + 1 + MAX_WFD_SD_SUBELEMS));
if (tlvs == NULL)
return 0;
if (os_strstr(role, "[source]"))
wfd_add_sd_req_role(tlvs, id++, 0x00, subelems);
if (os_strstr(role, "[pri-sink]"))
wfd_add_sd_req_role(tlvs, id++, 0x01, subelems);
if (os_strstr(role, "[sec-sink]"))
wfd_add_sd_req_role(tlvs, id++, 0x02, subelems);
if (os_strstr(role, "[source+sink]"))
wfd_add_sd_req_role(tlvs, id++, 0x03, subelems);
ret = wpas_p2p_sd_request_wfd(wpa_s, dst, tlvs);
wpabuf_free(tlvs);
return ret;
}
#endif /* CONFIG_WIFI_DISPLAY */
int wpas_p2p_sd_cancel_request(struct wpa_supplicant *wpa_s, u64 req)
{
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT)
return wpa_drv_p2p_sd_cancel_request(wpa_s, req);
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return -1;
return p2p_sd_cancel_request(wpa_s->global->p2p,
(void *) (uintptr_t) req);
}
void wpas_p2p_sd_response(struct wpa_supplicant *wpa_s, int freq,
const u8 *dst, u8 dialog_token,
const struct wpabuf *resp_tlvs)
{
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT) {
wpa_drv_p2p_sd_response(wpa_s, freq, dst, dialog_token,
resp_tlvs);
return;
}
if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL)
return;
p2p_sd_response(wpa_s->global->p2p, freq, dst, dialog_token,
resp_tlvs);
}
void wpas_p2p_sd_service_update(struct wpa_supplicant *wpa_s)
{
if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_MGMT) {
wpa_drv_p2p_service_update(wpa_s);
return;
}
if (wpa_s->global->p2p)
p2p_sd_service_update(wpa_s->global->p2p);
}
static void wpas_p2p_srv_bonjour_free(struct p2p_srv_bonjour *bsrv)
{
dl_list_del(&bsrv->list);
wpabuf_free(bsrv->query);
wpabuf_free(bsrv->resp);
os_free(bsrv);
}
static void wpas_p2p_srv_upnp_free(struct p2p_srv_upnp *usrv)
{
dl_list_del(&usrv->list);
os_free(usrv->service);
os_free(usrv);
}
void wpas_p2p_service_flush(struct wpa_supplicant *wpa_s)
{
struct p2p_srv_bonjour *bsrv, *bn;
struct p2p_srv_upnp *usrv, *un;
dl_list_for_each_safe(bsrv, bn, &wpa_s->global->p2p_srv_bonjour,
struct p2p_srv_bonjour, list)
wpas_p2p_srv_bonjour_free(bsrv);
dl_list_for_each_safe(usrv, un, &wpa_s->global->p2p_srv_upnp,
struct p2p_srv_upnp, list)
wpas_p2p_srv_upnp_free(usrv);
wpas_p2p_sd_service_update(wpa_s);
}
int wpas_p2p_service_add_bonjour(struct wpa_supplicant *wpa_s,
struct wpabuf *query, struct wpabuf *resp)
{
struct p2p_srv_bonjour *bsrv;
bsrv = os_zalloc(sizeof(*bsrv));
if (bsrv == NULL)
return -1;
bsrv->query = query;
bsrv->resp = resp;
dl_list_add(&wpa_s->global->p2p_srv_bonjour, &bsrv->list);
wpas_p2p_sd_service_update(wpa_s);
return 0;
}
int wpas_p2p_service_del_bonjour(struct wpa_supplicant *wpa_s,
const struct wpabuf *query)
{
struct p2p_srv_bonjour *bsrv;
bsrv = wpas_p2p_service_get_bonjour(wpa_s, query);
if (bsrv == NULL)
return -1;
wpas_p2p_srv_bonjour_free(bsrv);
wpas_p2p_sd_service_update(wpa_s);
return 0;
}
int wpas_p2p_service_add_upnp(struct wpa_supplicant *wpa_s, u8 version,
const char *service)
{
struct p2p_srv_upnp *usrv;
if (wpas_p2p_service_get_upnp(wpa_s, version, service))
return 0; /* Already listed */
usrv = os_zalloc(sizeof(*usrv));
if (usrv == NULL)
return -1;
usrv->version = version;
usrv->service = os_strdup(service);
if (usrv->service == NULL) {
os_free(usrv);
return -1;
}
dl_list_add(&wpa_s->global->p2p_srv_upnp, &usrv->list);
wpas_p2p_sd_service_update(wpa_s);
return 0;
}
int wpas_p2p_service_del_upnp(struct wpa_supplicant *wpa_s, u8 version,
const char *service)
{
struct p2p_srv_upnp *usrv;
usrv = wpas_p2p_service_get_upnp(wpa_s, version, service);
if (usrv == NULL)
return -1;
wpas_p2p_srv_upnp_free(usrv);
wpas_p2p_sd_service_update(wpa_s);
return 0;
}
static void wpas_prov_disc_local_display(struct wpa_supplicant *wpa_s,
const u8 *peer, const char *params,
unsigned int generated_pin)
{
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_PROV_DISC_SHOW_PIN MACSTR
" %08d%s", MAC2STR(peer), generated_pin, params);
}
static void wpas_prov_disc_local_keypad(struct wpa_supplicant *wpa_s,
const u8 *peer, const char *params)
{
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_PROV_DISC_ENTER_PIN MACSTR
"%s", MAC2STR(peer), params);
}
void wpas_prov_disc_req(void *ctx, const u8 *peer, u16 config_methods,
const u8 *dev_addr, const u8 *pri_dev_type,
const char *dev_name, u16 supp_config_methods,
u8 dev_capab, u8 group_capab, const u8 *group_id,
size_t group_id_len)
{
struct wpa_supplicant *wpa_s = ctx;
char devtype[WPS_DEV_TYPE_BUFSIZE];
char params[300];
u8 empty_dev_type[8];
unsigned int generated_pin = 0;
struct wpa_supplicant *group = NULL;
if (group_id) {
for (group = wpa_s->global->ifaces; group; group = group->next)
{
struct wpa_ssid *s = group->current_ssid;
if (s != NULL &&
s->mode == WPAS_MODE_P2P_GO &&
group_id_len - ETH_ALEN == s->ssid_len &&
os_memcmp(group_id + ETH_ALEN, s->ssid,
s->ssid_len) == 0)
break;
}
}
if (pri_dev_type == NULL) {
os_memset(empty_dev_type, 0, sizeof(empty_dev_type));
pri_dev_type = empty_dev_type;
}
os_snprintf(params, sizeof(params), " p2p_dev_addr=" MACSTR
" pri_dev_type=%s name='%s' config_methods=0x%x "
"dev_capab=0x%x group_capab=0x%x%s%s",
MAC2STR(dev_addr),
wps_dev_type_bin2str(pri_dev_type, devtype,
sizeof(devtype)),
dev_name, supp_config_methods, dev_capab, group_capab,
group ? " group=" : "",
group ? group->ifname : "");
params[sizeof(params) - 1] = '\0';
if (config_methods & WPS_CONFIG_DISPLAY) {
generated_pin = wps_generate_pin();
wpas_prov_disc_local_display(wpa_s, peer, params,
generated_pin);
} else if (config_methods & WPS_CONFIG_KEYPAD)
wpas_prov_disc_local_keypad(wpa_s, peer, params);
else if (config_methods & WPS_CONFIG_PUSHBUTTON)
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_PROV_DISC_PBC_REQ
MACSTR "%s", MAC2STR(peer), params);
wpas_notify_p2p_provision_discovery(wpa_s, peer, 1 /* request */,
P2P_PROV_DISC_SUCCESS,
config_methods, generated_pin);
}
void wpas_prov_disc_resp(void *ctx, const u8 *peer, u16 config_methods)
{
struct wpa_supplicant *wpa_s = ctx;
unsigned int generated_pin = 0;
char params[20];
if (wpa_s->pending_pd_before_join &&
(os_memcmp(peer, wpa_s->pending_join_dev_addr, ETH_ALEN) == 0 ||
os_memcmp(peer, wpa_s->pending_join_iface_addr, ETH_ALEN) == 0)) {
wpa_s->pending_pd_before_join = 0;
wpa_printf(MSG_DEBUG, "P2P: Starting pending "
"join-existing-group operation");
wpas_p2p_join_start(wpa_s);
return;
}
if (wpa_s->pending_pd_use == AUTO_PD_JOIN ||
wpa_s->pending_pd_use == AUTO_PD_GO_NEG)
os_snprintf(params, sizeof(params), " peer_go=%d",
wpa_s->pending_pd_use == AUTO_PD_JOIN);
else
params[0] = '\0';
if (config_methods & WPS_CONFIG_DISPLAY)
wpas_prov_disc_local_keypad(wpa_s, peer, params);
else if (config_methods & WPS_CONFIG_KEYPAD) {
generated_pin = wps_generate_pin();
wpas_prov_disc_local_display(wpa_s, peer, params,
generated_pin);
} else if (config_methods & WPS_CONFIG_PUSHBUTTON)
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_PROV_DISC_PBC_RESP
MACSTR "%s", MAC2STR(peer), params);
wpas_notify_p2p_provision_discovery(wpa_s, peer, 0 /* response */,
P2P_PROV_DISC_SUCCESS,
config_methods, generated_pin);
}
static void wpas_prov_disc_fail(void *ctx, const u8 *peer,
enum p2p_prov_disc_status status)
{
struct wpa_supplicant *wpa_s = ctx;
if (wpa_s->p2p_fallback_to_go_neg) {
wpa_dbg(wpa_s, MSG_DEBUG, "P2P: PD for p2p_connect-auto "
"failed - fall back to GO Negotiation");
wpas_p2p_fallback_to_go_neg(wpa_s, 0);
return;
}
if (status == P2P_PROV_DISC_TIMEOUT_JOIN) {
wpa_s->pending_pd_before_join = 0;
wpa_printf(MSG_DEBUG, "P2P: Starting pending "
"join-existing-group operation (no ACK for PD "
"Req attempts)");
wpas_p2p_join_start(wpa_s);
return;
}
wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_PROV_DISC_FAILURE
" p2p_dev_addr=" MACSTR " status=%d",
MAC2STR(peer), status);
wpas_notify_p2p_provision_discovery(wpa_s, peer, 0 /* response */,
status, 0, 0);
}
static int freq_included(const struct p2p_channels *channels, unsigned int freq)
{
if (channels == NULL)
return 1; /* Assume no restrictions */
return p2p_channels_includes_freq(channels, freq);
}
static u8 wpas_invitation_process(void *ctx, const u8 *sa, const u8 *bssid,
const u8 *go_dev_addr, const u8 *ssid,
size_t ssid_len, int *go, u8 *group_bssid,
int *force_freq, int persistent_group,
const struct p2p_channels *channels)
{
struct wpa_supplicant *wpa_s = ctx;
struct wpa_ssid *s;
int res;
struct wpa_supplicant *grp;
if (!persistent_group) {
wpa_printf(MSG_DEBUG, "P2P: Invitation from " MACSTR
" to join an active group", MAC2STR(sa));
if (!is_zero_ether_addr(wpa_s->p2p_auth_invite) &&
(os_memcmp(go_dev_addr, wpa_s->p2p_auth_invite, ETH_ALEN)
== 0 ||
os_memcmp(sa, wpa_s->p2p_auth_invite, ETH_ALEN) == 0)) {
wpa_printf(MSG_DEBUG, "P2P: Accept previously "
"authorized invitation");
goto accept_inv;
}
/*
* Do not accept the invitation automatically; notify user and
* request approval.
*/
return P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE;
}
grp = wpas_get_p2p_group(wpa_s, ssid, ssid_len, go);
if (grp) {
wpa_printf(MSG_DEBUG, "P2P: Accept invitation to already "
"running persistent group");
if (*go)
os_memcpy(group_bssid, grp->own_addr, ETH_ALEN);
goto accept_inv;
}
if (!is_zero_ether_addr(wpa_s->p2p_auth_invite) &&
os_memcmp(sa, wpa_s->p2p_auth_invite, ETH_ALEN) == 0) {
wpa_printf(MSG_DEBUG, "P2P: Accept previously initiated "
"invitation to re-invoke a persistent group");
} else if (!wpa_s->conf->persistent_reconnect)
return P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE;
for (s = wpa_s->conf->ssid; s; s = s->next) {
if (s->disabled == 2 &&
os_memcmp(s->bssid, go_dev_addr, ETH_ALEN) == 0 &&
s->ssid_len == ssid_len &&
os_memcmp(ssid, s->ssid, ssid_len) == 0)
break