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P2P: Add automatic GO Negotiation vs. join-a-group selection

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p2p_connect command can now be used with an optional "auto" parameter
to request wpa_supplicant to determine automatically whether to use
join-a-group operation (if the peer is operating as a GO) or group
formation. This makes it easier for external programs to handle
connection type selection by offloading this to wpa_supplicant. The
previously used p2p_connect join commands can be replaced with
p2p_connect auto to use this new mechanism.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2012-04-13 16:04:36 +03:00 committed by Jouni Malinen
parent 7b63c6396a
commit b31be3a0fd
5 changed files with 81 additions and 17 deletions
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6
wpa_supplicant/ctrl_iface.c
View File

@ -2858,6 +2858,7 @@ static int p2p_ctrl_connect(struct wpa_supplicant *wpa_s, char *cmd,
int persistent_group;
int join;
int auth;
int automatic;
int go_intent = -1;
int freq = 0;
@ -2875,6 +2876,7 @@ static int p2p_ctrl_connect(struct wpa_supplicant *wpa_s, char *cmd,
persistent_group = os_strstr(pos, " persistent") != NULL;
join = os_strstr(pos, " join") != NULL;
auth = os_strstr(pos, " auth") != NULL;
automatic = os_strstr(pos, " auto") != NULL;
pos2 = os_strstr(pos, " go_intent=");
if (pos2) {
@ -2909,8 +2911,8 @@ static int p2p_ctrl_connect(struct wpa_supplicant *wpa_s, char *cmd,
}
new_pin = wpas_p2p_connect(wpa_s, addr, pin, wps_method,
persistent_group, join, auth, go_intent,
freq);
persistent_group, automatic, join,
auth, go_intent, freq);
if (new_pin == -2) {
os_memcpy(buf, "FAIL-CHANNEL-UNAVAILABLE\n", 25);
return 25;

2
wpa_supplicant/dbus/dbus_new_handlers_p2p.c
View File

@ -508,7 +508,7 @@ DBusMessage * wpas_dbus_handler_p2p_connect(DBusMessage *message,
goto inv_args;
new_pin = wpas_p2p_connect(wpa_s, addr, pin, wps_method,
persistent_group, join, authorize_only,
persistent_group, 0, join, authorize_only,
go_intent, freq);
if (new_pin >= 0) {

81
wpa_supplicant/p2p_supplicant.c
View File

@ -55,7 +55,8 @@ wpas_p2p_get_group_iface(struct wpa_supplicant *wpa_s, int addr_allocated,
static int wpas_p2p_join_start(struct wpa_supplicant *wpa_s);
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);
const u8 *dev_addr, enum p2p_wps_method wps_method,
int auto_join);
static void wpas_p2p_pd_before_join_timeout(void *eloop_ctx,
void *timeout_ctx);
static int wpas_p2p_create_iface(struct wpa_supplicant *wpa_s);
@ -1969,7 +1970,7 @@ static void wpas_invitation_received(void *ctx, const u8 *sa, const u8 *bssid,
wpa_s, s, s->mode == WPAS_MODE_P2P_GO, 0);
} else if (bssid) {
wpas_p2p_join(wpa_s, bssid, go_dev_addr,
wpa_s->p2p_wps_method);
wpa_s->p2p_wps_method, 0);
}
return;
}
@ -2647,6 +2648,31 @@ static int wpas_check_freq_conflict(struct wpa_supplicant *wpa_s, int freq)
}
static int wpas_p2p_peer_go(struct wpa_supplicant *wpa_s,
const u8 *peer_dev_addr)
{
struct wpa_bss *bss;
int updated;
bss = wpa_bss_get_p2p_dev_addr(wpa_s, peer_dev_addr);
if (bss == NULL)
return 0;
if (bss->last_update_idx < wpa_s->bss_update_idx) {
wpa_printf(MSG_DEBUG, "P2P: Peer BSS entry not updated in the "
"last scan");
return 0;
}
updated = os_time_before(&wpa_s->p2p_auto_started, &bss->last_update);
wpa_printf(MSG_DEBUG, "P2P: Current BSS entry for peer updated at "
"%ld.%06ld (%supdated in last scan)",
bss->last_update.sec, bss->last_update.usec,
updated ? "": "not ");
return updated;
}
static void wpas_p2p_scan_res_join(struct wpa_supplicant *wpa_s,
struct wpa_scan_results *scan_res)
{
@ -2659,12 +2685,29 @@ static void wpas_p2p_scan_res_join(struct wpa_supplicant *wpa_s,
if (wpa_s->global->p2p_disabled)
return;
wpa_printf(MSG_DEBUG, "P2P: Scan results received (%d BSS) for join",
scan_res ? (int) scan_res->num : -1);
wpa_printf(MSG_DEBUG, "P2P: Scan results received (%d BSS) for %sjoin",
scan_res ? (int) scan_res->num : -1,
wpa_s->p2p_auto_join ? "auto_" : "");
if (scan_res)
wpas_p2p_scan_res_handler(wpa_s, scan_res);
if (wpa_s->p2p_auto_join) {
if (!wpas_p2p_peer_go(wpa_s, wpa_s->pending_join_dev_addr)) {
wpa_printf(MSG_DEBUG, "P2P: Peer was not found to be "
"running a GO -> use GO Negotiation");
wpas_p2p_connect(wpa_s, wpa_s->pending_join_dev_addr,
wpa_s->p2p_pin, wpa_s->p2p_wps_method,
wpa_s->p2p_persistent_group, 0, 0, 0,
wpa_s->p2p_go_intent,
wpa_s->p2p_connect_freq);
return;
}
wpa_printf(MSG_DEBUG, "P2P: Peer was found running GO -> try "
"to join the group");
}
freq = p2p_get_oper_freq(wpa_s->global->p2p,
wpa_s->pending_join_iface_addr);
if (freq < 0 &&
@ -2836,12 +2879,15 @@ 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)
const u8 *dev_addr, enum p2p_wps_method wps_method,
int auto_join)
{
wpa_printf(MSG_DEBUG, "P2P: Request to join existing group (iface "
MACSTR " dev " MACSTR ")",
MAC2STR(iface_addr), MAC2STR(dev_addr));
MACSTR " dev " MACSTR ")%s",
MAC2STR(iface_addr), MAC2STR(dev_addr),
auto_join ? " (auto_join)" : "");
wpa_s->p2p_auto_join = !!auto_join;
os_memcpy(wpa_s->pending_join_iface_addr, iface_addr, ETH_ALEN);
os_memcpy(wpa_s->pending_join_dev_addr, dev_addr, ETH_ALEN);
wpa_s->pending_join_wps_method = wps_method;
@ -2912,6 +2958,7 @@ static int wpas_p2p_join_start(struct wpa_supplicant *wpa_s)
* @peer_addr: Address of the peer P2P Device
* @pin: PIN to use during provisioning or %NULL to indicate PBC mode
* @persistent_group: Whether to create a persistent group
* @auto_join: Whether to select join vs. GO Negotiation automatically
* @join: Whether to join an existing group (as a client) instead of starting
* Group Owner negotiation; @peer_addr is BSSID in that case
* @auth: Whether to only authorize the connection instead of doing that and
@ -2924,8 +2971,8 @@ static int wpas_p2p_join_start(struct wpa_supplicant *wpa_s)
*/
int wpas_p2p_connect(struct wpa_supplicant *wpa_s, const u8 *peer_addr,
const char *pin, enum p2p_wps_method wps_method,
int persistent_group, int join, int auth, int go_intent,
int freq)
int persistent_group, int auto_join, int join, int auth,
int go_intent, int freq)
{
int force_freq = 0, oper_freq = 0;
u8 bssid[ETH_ALEN];
@ -2943,6 +2990,9 @@ int wpas_p2p_connect(struct wpa_supplicant *wpa_s, const u8 *peer_addr,
wpa_s->p2p_long_listen = 0;
wpa_s->p2p_wps_method = wps_method;
wpa_s->p2p_persistent_group = !!persistent_group;
wpa_s->p2p_go_intent = go_intent;
wpa_s->p2p_connect_freq = freq;
if (pin)
os_strlcpy(wpa_s->p2p_pin, pin, sizeof(wpa_s->p2p_pin));
@ -2955,7 +3005,7 @@ int wpas_p2p_connect(struct wpa_supplicant *wpa_s, const u8 *peer_addr,
} else
wpa_s->p2p_pin[0] = '\0';
if (join) {
if (join || auto_join) {
u8 iface_addr[ETH_ALEN], dev_addr[ETH_ALEN];
if (auth) {
wpa_printf(MSG_DEBUG, "P2P: Authorize invitation to "
@ -2971,8 +3021,15 @@ int wpas_p2p_connect(struct wpa_supplicant *wpa_s, const u8 *peer_addr,
p2p_get_dev_addr(wpa_s->global->p2p, peer_addr,
dev_addr);
}
if (wpas_p2p_join(wpa_s, iface_addr, dev_addr, wps_method) <
0)
if (auto_join) {
os_get_time(&wpa_s->p2p_auto_started);
wpa_printf(MSG_DEBUG, "P2P: Auto join started at "
"%ld.%06ld",
wpa_s->p2p_auto_started.sec,
wpa_s->p2p_auto_started.usec);
}
if (wpas_p2p_join(wpa_s, iface_addr, dev_addr, wps_method,
auto_join) < 0)
return -1;
return ret;
}

4
wpa_supplicant/p2p_supplicant.h
View File

@ -19,8 +19,8 @@ void wpas_p2p_deinit(struct wpa_supplicant *wpa_s);
void wpas_p2p_deinit_global(struct wpa_global *global);
int wpas_p2p_connect(struct wpa_supplicant *wpa_s, const u8 *peer_addr,
const char *pin, enum p2p_wps_method wps_method,
int persistent_group, int join, int auth, int go_intent,
int freq);
int persistent_group, int auto_join, int join,
int auth, int go_intent, int freq);
void wpas_p2p_remain_on_channel_cb(struct wpa_supplicant *wpa_s,
unsigned int freq, unsigned int duration);
void wpas_p2p_cancel_remain_on_channel_cb(struct wpa_supplicant *wpa_s,

5
wpa_supplicant/wpa_supplicant_i.h
View File

@ -508,6 +508,11 @@ struct wpa_supplicant {
} removal_reason;
unsigned int p2p_cb_on_scan_complete:1;
unsigned int p2p_auto_join:1;
unsigned int p2p_persistent_group:1;
int p2p_go_intent;
int p2p_connect_freq;
struct os_time p2p_auto_started;
#endif /* CONFIG_P2P */
struct wpa_ssid *bgscan_ssid;