[PATCH 06/23] P2P: Save group common frequencies

[Ilan Peer]

Once a P2P GO interface is configured, save the group common
frequencies, as this can be later be useful for channel
selection considerations during channel switch etc.

Change-Id: Id68b0cc6c2c97384d7656af8d03d68610b1138aa
Signed-off-by: Ilan Peer <ilan.peer at intel.com>
---
 wpa_supplicant/p2p_supplicant.c   |   45 +++++++++++++++++++++++++++++++++++++
 wpa_supplicant/wpa_supplicant_i.h |    5 +++++
 2 files changed, 50 insertions(+)

diff --git a/wpa_supplicant/p2p_supplicant.c b/wpa_supplicant/p2p_supplicant.c
index 2a8a88f..8da710c 100644
--- a/wpa_supplicant/p2p_supplicant.c
+++ b/wpa_supplicant/p2p_supplicant.c
@@ -540,6 +540,10 @@ static int wpas_p2p_group_delete(struct wpa_supplicant *wpa_s,
 	os_free(wpa_s->go_params);
 	wpa_s->go_params = NULL;
 
+	os_free(wpa_s->p2p_group_common_freqs);
+	wpa_s->p2p_group_common_freqs = NULL;
+	wpa_s->p2p_group_common_freqs_num = 0;
+
 	wpa_s->waiting_presence_resp = 0;
 
 	wpa_printf(MSG_DEBUG, "P2P: Remove temporary group network");
@@ -1190,6 +1194,39 @@ static void wpas_p2p_add_psk_list(struct wpa_supplicant *wpa_s,
 	}
 }
 
+static void p2p_go_dump_common_freqs(struct wpa_supplicant *wpa_s)
+{
+	unsigned int i;
+
+	wpa_dbg(wpa_s, MSG_DEBUG, "Common Group frequencies (len=%u):",
+		wpa_s->p2p_group_common_freqs_num);
+
+	for (i = 0; i < wpa_s->p2p_group_common_freqs_num; i++)
+		wpa_dbg(wpa_s, MSG_DEBUG, "freq[%u]: %d ",
+			i, wpa_s->p2p_group_common_freqs[i]);
+}
+
+
+static void p2p_go_save_group_common_freqs(struct wpa_supplicant *wpa_s,
+					   struct p2p_go_neg_results *params)
+{
+	unsigned int i, len = int_array_len(wpa_s->go_params->freq_list);
+
+	wpa_s->p2p_group_common_freqs_num = 0;
+	wpa_s->p2p_group_common_freqs = os_zalloc(len * sizeof(int));
+
+	if (!wpa_s->p2p_group_common_freqs)
+		return;
+
+	for (i = 0; i < len; i++) {
+		if (!wpa_s->go_params->freq_list[i])
+			break;
+		wpa_s->p2p_group_common_freqs[i] =
+			wpa_s->go_params->freq_list[i];
+	}
+	wpa_s->p2p_group_common_freqs_num = i;
+}
+
 
 static void p2p_go_configured(void *ctx, void *data)
 {
@@ -1198,6 +1235,9 @@ static void p2p_go_configured(void *ctx, void *data)
 	struct wpa_ssid *ssid;
 	int network_id = -1;
 
+	p2p_go_save_group_common_freqs(wpa_s, params);
+	p2p_go_dump_common_freqs(wpa_s);
+
 	ssid = wpa_s->current_ssid;
 	if (ssid && ssid->mode == WPAS_MODE_P2P_GO) {
 		wpa_printf(MSG_DEBUG, "P2P: Group setup without provisioning");
@@ -1287,6 +1327,7 @@ static void p2p_go_configured(void *ctx, void *data)
 	} 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;
 }
@@ -4144,6 +4185,10 @@ void wpas_p2p_deinit(struct wpa_supplicant *wpa_s)
 	wpabuf_free(wpa_s->p2p_oob_dev_pw);
 	wpa_s->p2p_oob_dev_pw = NULL;
 
+	os_free(wpa_s->p2p_group_common_freqs);
+	wpa_s->p2p_group_common_freqs = NULL;
+	wpa_s->p2p_group_common_freqs_num = 0;
+
 	/* TODO: remove group interface from the driver if this wpa_s instance
 	 * is on top of a P2P group interface */
 }
diff --git a/wpa_supplicant/wpa_supplicant_i.h b/wpa_supplicant/wpa_supplicant_i.h
index 8a9ca97..bfa5968 100644
--- a/wpa_supplicant/wpa_supplicant_i.h
+++ b/wpa_supplicant/wpa_supplicant_i.h
@@ -769,6 +769,11 @@ struct wpa_supplicant {
 					* formation */
 	u8 p2p_peer_oob_pubkey_hash[WPS_OOB_PUBKEY_HASH_LEN];
 	u8 p2p_ip_addr_info[3 * 4];
+
+	/* group common frequencies */
+	int *p2p_group_common_freqs;
+	unsigned int p2p_group_common_freqs_num;
+
 #endif /* CONFIG_P2P */
 
 	struct wpa_ssid *bgscan_ssid;
-- 
1.7.10.4