hostapd: Track interface state

The new hostapd_iface::state enum is used to track the current state of
the hostapd interface (a radio/wiphy).

Signed-hostap: Jouni Malinen <j@w1.fi>

src/ap/acs.c

@@ -795,6 +795,7 @@ enum hostapd_chan_status acs_init(struct hostapd_iface *iface)
 	if (err < 0)
 		return HOSTAPD_CHAN_INVALID;
 
+	hostapd_set_state(iface, HAPD_IFACE_ACS);
 	wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, ACS_EVENT_STARTED);
 
 	return HOSTAPD_CHAN_ACS;

src/ap/dfs.c

@@ -568,6 +568,7 @@ int hostapd_handle_dfs(struct hostapd_data *hapd)
 	} while (res);
 
 	/* Finally start CAC */
+	hostapd_set_state(hapd->iface, HAPD_IFACE_DFS);
 	wpa_printf(MSG_DEBUG, "DFS start CAC on %d MHz", hapd->iface->freq);
 	wpa_msg(hapd->msg_ctx, MSG_INFO, DFS_EVENT_CAC_START
 		"freq=%d chan=%d sec_chan=%d",

src/ap/hostapd.c

@@ -987,6 +987,7 @@ static int setup_interface(struct hostapd_iface *iface)
 	if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
 		char country[4], previous_country[4];
 
+		hostapd_set_state(iface, HAPD_IFACE_COUNTRY_UPDATE);
 		if (hostapd_get_country(hapd, previous_country) < 0)
 			previous_country[0] = '\0';
 
@@ -1056,6 +1057,7 @@ int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
 
 	if (err) {
 		wpa_printf(MSG_ERROR, "Interface initialization failed");
+		hostapd_set_state(iface, HAPD_IFACE_DISABLED);
 		eloop_terminate();
 		return -1;
 	}
@@ -1153,6 +1155,7 @@ int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
 			return -1;
 	}
 
+	hostapd_set_state(iface, HAPD_IFACE_ENABLED);
 	if (hapd->setup_complete_cb)
 		hapd->setup_complete_cb(hapd->setup_complete_cb_ctx);
 
@@ -1535,6 +1538,7 @@ int hostapd_disable_iface(struct hostapd_iface *hapd_iface)
 
 	wpa_printf(MSG_DEBUG, "Interface %s disabled",
 		   hapd_iface->bss[0]->conf->iface);
+	hostapd_set_state(hapd_iface, HAPD_IFACE_DISABLED);
 	return 0;
 }
 
@@ -1890,3 +1894,35 @@ void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
 	eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
 			       ap_handle_timer, hapd, sta);
 }
+
+
+static const char * hostapd_state_text(enum hostapd_iface_state s)
+{
+	switch (s) {
+	case HAPD_IFACE_UNINITIALIZED:
+		return "UNINITIALIZED";
+	case HAPD_IFACE_DISABLED:
+		return "DISABLED";
+	case HAPD_IFACE_COUNTRY_UPDATE:
+		return "COUNTRY_UPDATE";
+	case HAPD_IFACE_ACS:
+		return "ACS";
+	case HAPD_IFACE_HT_SCAN:
+		return "HT_SCAN";
+	case HAPD_IFACE_DFS:
+		return "DFS";
+	case HAPD_IFACE_ENABLED:
+		return "ENABLED";
+	}
+
+	return "UNKNOWN";
+}
+
+
+void hostapd_set_state(struct hostapd_iface *iface, enum hostapd_iface_state s)
+{
+	wpa_printf(MSG_INFO, "%s: interface state %s->%s",
+		   iface->conf->bss[0]->iface, hostapd_state_text(iface->state),
+		   hostapd_state_text(s));
+	iface->state = s;
+}

src/ap/hostapd.h

@@ -251,6 +251,16 @@ struct hostapd_iface {
 	struct hostapd_config *conf;
 	char phy[16]; /* Name of the PHY (radio) */
 
+	enum hostapd_iface_state {
+		HAPD_IFACE_UNINITIALIZED,
+		HAPD_IFACE_DISABLED,
+		HAPD_IFACE_COUNTRY_UPDATE,
+		HAPD_IFACE_ACS,
+		HAPD_IFACE_HT_SCAN,
+		HAPD_IFACE_DFS,
+		HAPD_IFACE_ENABLED
+	} state;
+
 	size_t num_bss;
 	struct hostapd_data **bss;
 
@@ -364,6 +374,7 @@ int hostapd_disable_iface(struct hostapd_iface *hapd_iface);
 int hostapd_add_iface(struct hapd_interfaces *ifaces, char *buf);
 int hostapd_remove_iface(struct hapd_interfaces *ifaces, char *buf);
 void hostapd_channel_list_updated(struct hostapd_iface *iface);
+void hostapd_set_state(struct hostapd_iface *iface, enum hostapd_iface_state s);
 
 /* utils.c */
 int hostapd_register_probereq_cb(struct hostapd_data *hapd,

src/ap/hw_features.c

@@ -539,6 +539,7 @@ static int ieee80211n_check_40mhz(struct hostapd_iface *iface)
 	if (!iface->conf->secondary_channel)
 		return 0; /* HT40 not used */
 
+	hostapd_set_state(iface, HAPD_IFACE_HT_SCAN);
 	wpa_printf(MSG_DEBUG, "Scan for neighboring BSSes prior to enabling "
 		   "40 MHz channel");
 	os_memset(&params, 0, sizeof(params));