Add option for disabling automatic reconnection on disconnection

ctrl_interface STA_AUTOCONNECT command can now be used to disable
automatic reconnection on receiving disconnection event. The default
behavior is for wpa_supplicant to try to reconnect automatically, i.e.,
to maintain previous behavior.

wpa_supplicant/ctrl_iface.c

@@ -2590,6 +2590,14 @@ static int p2p_ctrl_ext_listen(struct wpa_supplicant *wpa_s, char *cmd)
 #endif /* CONFIG_P2P */
 
 
+static int wpa_supplicant_ctrl_iface_sta_autoconnect(
+	struct wpa_supplicant *wpa_s, char *cmd)
+{
+	wpa_s->auto_reconnect_disabled = atoi(cmd) == 0 ? 1 : 0;
+	return 0;
+}
+
+
 char * wpa_supplicant_ctrl_iface_process(struct wpa_supplicant *wpa_s,
 					 char *buf, size_t *resp_len)
 {
@@ -2903,6 +2911,9 @@ char * wpa_supplicant_ctrl_iface_process(struct wpa_supplicant *wpa_s,
 	} else if (os_strncmp(buf, "ROAM ", 5) == 0) {
 		if (wpa_supplicant_ctrl_iface_roam(wpa_s, buf + 5))
 			reply_len = -1;
+	} else if (os_strncmp(buf, "STA_AUTOCONNECT ", 16) == 0) {
+		if (wpa_supplicant_ctrl_iface_sta_autoconnect(wpa_s, buf + 16))
+			reply_len = -1;
 	} else {
 		os_memcpy(reply, "UNKNOWN COMMAND\n", 16);
 		reply_len = 16;

wpa_supplicant/events.c

@@ -1225,8 +1225,19 @@ static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s,
 		wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
 			"pre-shared key may be incorrect");
 	}
-	if (wpa_s->wpa_state >= WPA_ASSOCIATED)
-		wpa_supplicant_req_scan(wpa_s, 0, 100000);
+	if (!wpa_s->auto_reconnect_disabled ||
+	    wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) {
+		wpa_printf(MSG_DEBUG, "WPA: Auto connect enabled: try to "
+			   "reconnect (wps=%d)",
+			   wpa_s->key_mgmt == WPA_KEY_MGMT_WPS);
+		if (wpa_s->wpa_state >= WPA_ASSOCIATED)
+			wpa_supplicant_req_scan(wpa_s, 0, 100000);
+	} else {
+		wpa_printf(MSG_DEBUG, "WPA: Auto connect disabled: do not try "
+			   "to re-connect");
+		wpa_s->reassociate = 0;
+		wpa_s->disconnected = 1;
+	}
 	bssid = wpa_s->bssid;
 	if (is_zero_ether_addr(bssid))
 		bssid = wpa_s->pending_bssid;

wpa_supplicant/wpa_cli.c

@@ -2088,6 +2088,26 @@ static int wpa_cli_cmd_p2p_ext_listen(struct wpa_ctrl *ctrl, int argc,
 #endif /* CONFIG_P2P */
 
 
+static int wpa_cli_cmd_sta_autoconnect(struct wpa_ctrl *ctrl, int argc,
+				       char *argv[])
+{
+	char cmd[256];
+	int res;
+
+	if (argc != 1) {
+		printf("Invalid STA_AUTOCONNECT command: needs one argument "
+		       "(0/1 = disable/enable automatic reconnection)\n");
+		return -1;
+	}
+	res = os_snprintf(cmd, sizeof(cmd), "STA_AUTOCONNECT %s", argv[0]);
+	if (res < 0 || (size_t) res >= sizeof(cmd) - 1) {
+		printf("Too long STA_AUTOCONNECT command.\n");
+		return -1;
+	}
+	return wpa_ctrl_command(ctrl, cmd);
+}
+
+
 enum wpa_cli_cmd_flags {
 	cli_cmd_flag_none		= 0x00,
 	cli_cmd_flag_sensitive		= 0x01
@@ -2364,6 +2384,8 @@ static struct wpa_cli_cmd wpa_cli_commands[] = {
 	{ "p2p_ext_listen", wpa_cli_cmd_p2p_ext_listen, cli_cmd_flag_none,
 	  "[<period> <interval>] = set extended listen timing" },
 #endif /* CONFIG_P2P */
+	{ "sta_autoconnect", wpa_cli_cmd_sta_autoconnect, cli_cmd_flag_none,
+	  "<0/1> = disable/enable automatic reconnection" },
 	{ NULL, NULL, cli_cmd_flag_none, NULL }
 };
 

wpa_supplicant/wpa_supplicant_i.h

@@ -525,6 +525,7 @@ struct wpa_supplicant {
 	int after_wps;
 	unsigned int wps_freq;
 	int wps_fragment_size;
+	int auto_reconnect_disabled;
 };