[PATCH] wpa_supplicant: Add bss_flush command to invalidate scan results

[Dmitry Shmidt]

Change-Id: I1a6ebc4fe53e16909ac44e2d04a6b651993dae91
Signed-off-by: Dmitry Shmidt <dimitrysh at google.com>
---
 wpa_supplicant/ctrl_iface.c |   16 ++++++++++++++++
 wpa_supplicant/wpa_cli.c    |   20 ++++++++++++++++++++
 2 files changed, 36 insertions(+), 0 deletions(-)

diff --git a/wpa_supplicant/ctrl_iface.c b/wpa_supplicant/ctrl_iface.c
index 5de4f7b..ec61b84 100644
--- a/wpa_supplicant/ctrl_iface.c
+++ b/wpa_supplicant/ctrl_iface.c
@@ -2884,6 +2884,19 @@ static int wpa_supplicant_ctrl_iface_bss_expire_count(
 }
 
 
+static int wpa_supplicant_ctrl_iface_bss_flush(
+	struct wpa_supplicant *wpa_s, char *cmd)
+{
+	int flush_age = atoi(cmd);
+
+	if (flush_age == 0)
+		wpa_bss_flush(wpa_s);
+	else
+		wpa_bss_flush_by_age(wpa_s, flush_age);
+	return 0;
+}
+
+
 static void wpa_supplicant_ctrl_iface_drop_sa(struct wpa_supplicant *wpa_s)
 {
 	wpa_printf(MSG_DEBUG, "Dropping SA without deauthentication");
@@ -4578,6 +4591,9 @@ char * wpa_supplicant_ctrl_iface_process(struct wpa_supplicant *wpa_s,
 		if (wpa_supplicant_ctrl_iface_bss_expire_count(wpa_s,
 							       buf + 17))
 			reply_len = -1;
+	} else if (os_strncmp(buf, "BSS_FLUSH ", 10) == 0) {
+		if (wpa_supplicant_ctrl_iface_bss_flush(wpa_s, buf + 10))
+			reply_len = -1;
 #ifdef CONFIG_TDLS
 	} else if (os_strncmp(buf, "TDLS_DISCOVER ", 14) == 0) {
 		if (wpa_supplicant_ctrl_iface_tdls_discover(wpa_s, buf + 14))
diff --git a/wpa_supplicant/wpa_cli.c b/wpa_supplicant/wpa_cli.c
index 8e89281..53ed05d 100644
--- a/wpa_supplicant/wpa_cli.c
+++ b/wpa_supplicant/wpa_cli.c
@@ -656,6 +656,23 @@ static int wpa_cli_cmd_bss_expire_count(struct wpa_ctrl *ctrl, int argc,
 }
 
 
+static int wpa_cli_cmd_bss_flush(struct wpa_ctrl *ctrl, int argc, char *argv[])
+{
+	char cmd[256];
+	int res;
+
+	if (argc < 1)
+		res = os_snprintf(cmd, sizeof(cmd), "BSS_FLUSH 0");
+	else
+		res = os_snprintf(cmd, sizeof(cmd), "BSS_FLUSH %s", argv[0]);
+	if (res < 0 || (size_t) res >= sizeof(cmd) - 1) {
+		printf("Too long BSS_FLUSH command.\n");
+		return -1;
+	}
+	return wpa_ctrl_command(ctrl, cmd);
+}
+
+
 static int wpa_cli_cmd_stkstart(struct wpa_ctrl *ctrl, int argc,
 				char *argv[])
 {
@@ -2264,6 +2281,9 @@ static struct wpa_cli_cmd wpa_cli_commands[] = {
 	{ "bss_expire_count", wpa_cli_cmd_bss_expire_count,
 	  cli_cmd_flag_none,
 	  "<value> = set BSS expiration scan count parameter" },
+	{ "bss_flush", wpa_cli_cmd_bss_flush,
+	  cli_cmd_flag_none,
+	  "<value> = set BSS flush age (0 by default)" },
 	{ "stkstart", wpa_cli_cmd_stkstart,
 	  cli_cmd_flag_none,
 	  "<addr> = request STK negotiation with <addr>" },
-- 
1.7.7.3