sta-info: add last_connected field

Add a last_connected field to the sta_info struct. This field can be
used to determine, if and when a client was last connected to a given
node. This way, other nodes can determine where a client roamed to or
from.

Signed-off-by: David Bauer <mail@david-bauer.net>

local_node.c

@@ -172,6 +172,8 @@ usteer_local_node_set_assoc(struct usteer_local_node *ln, struct blob_attr *cl)
 	int n_assoc = 0;
 	int rem;
 
+	usteer_update_time();
+
 	list_for_each_entry(si, &node->sta_info, node_list) {
 		if (si->connected)
 			si->connected = STA_DISCONNECTED;
@@ -193,8 +195,10 @@ usteer_local_node_set_assoc(struct usteer_local_node *ln, struct blob_attr *cl)
 			h->update_sta(node, si);
 		}
 		usteer_local_node_assoc_update(si, cur);
-		if (si->connected == STA_CONNECTED)
+		if (si->connected == STA_CONNECTED) {
+			si->last_connected = current_time;
 			n_assoc++;
+		}
 	}
 
 	node->n_assoc = n_assoc;

parse.c

@@ -124,6 +124,7 @@ bool parse_apmsg_sta(struct apmsg_sta *msg, struct blob_attr *data)
 		[APMSG_STA_SEEN] = { .type = BLOB_ATTR_INT32 },
 		[APMSG_STA_TIMEOUT] = { .type = BLOB_ATTR_INT32 },
 		[APMSG_STA_CONNECTED] = { .type = BLOB_ATTR_INT8 },
+		[APMSG_STA_LAST_CONNECTED] = { .type = BLOB_ATTR_INT32 },
 	};
 	struct blob_attr *tb[__APMSG_STA_MAX];
 
@@ -132,7 +133,8 @@ bool parse_apmsg_sta(struct apmsg_sta *msg, struct blob_attr *data)
 	    !tb[APMSG_STA_SIGNAL] ||
 	    !tb[APMSG_STA_SEEN] ||
 	    !tb[APMSG_STA_TIMEOUT] ||
-	    !tb[APMSG_STA_CONNECTED])
+	    !tb[APMSG_STA_CONNECTED] ||
+	    !tb[APMSG_STA_LAST_CONNECTED])
 		return false;
 
 	if (blob_len(tb[APMSG_STA_ADDR]) != sizeof(msg->addr))
@@ -143,6 +145,7 @@ bool parse_apmsg_sta(struct apmsg_sta *msg, struct blob_attr *data)
 	msg->seen = blob_get_int32(tb[APMSG_STA_SEEN]);
 	msg->timeout = blob_get_int32(tb[APMSG_STA_TIMEOUT]);
 	msg->connected = blob_get_int8(tb[APMSG_STA_CONNECTED]);
+	msg->last_connected = blob_get_int32(tb[APMSG_STA_LAST_CONNECTED]);
 
 	return true;
 }

remote.c

@@ -180,6 +180,7 @@ interface_add_station(struct usteer_remote_node *node, struct blob_attr *data)
 	si->connected = msg.connected;
 	si->signal = msg.signal;
 	si->seen = current_time - msg.seen;
+	si->last_connected = current_time - msg.last_connected;
 	usteer_sta_info_update_timeout(si, msg.timeout);
 }
 
@@ -519,6 +520,7 @@ static void interface_send_msg(struct interface *iface, struct blob_attr *data){
 static void usteer_send_sta_info(struct sta_info *sta)
 {
 	int seen = current_time - sta->seen;
+	int last_connected = !!sta->connected ? 0 : current_time - sta->last_connected;
 	void *c;
 
 	c = blob_nest_start(&buf, 0);
@@ -526,6 +528,7 @@ static void usteer_send_sta_info(struct sta_info *sta)
 	blob_put_int8(&buf, APMSG_STA_CONNECTED, !!sta->connected);
 	blob_put_int32(&buf, APMSG_STA_SIGNAL, sta->signal);
 	blob_put_int32(&buf, APMSG_STA_SEEN, seen);
+	blob_put_int32(&buf, APMSG_STA_LAST_CONNECTED, last_connected);
 	blob_put_int32(&buf, APMSG_STA_TIMEOUT, config.local_sta_timeout - seen);
 	blob_nest_end(&buf, c);
 }

remote.h

@@ -72,6 +72,7 @@ enum {
 	APMSG_STA_TIMEOUT,
 	APMSG_STA_SEEN,
 	APMSG_STA_CONNECTED,
+	APMSG_STA_LAST_CONNECTED,
 	__APMSG_STA_MAX
 };
 
@@ -82,6 +83,7 @@ struct apmsg_sta {
 	int signal;
 	int timeout;
 	int seen;
+	int last_connected;
 };
 
 bool parse_apmsg(struct apmsg *msg, struct blob_attr *data);

usteer.h

@@ -210,6 +210,7 @@ struct sta_info {
 	struct sta_info_stats stats[__EVENT_TYPE_MAX];
 	uint64_t created;
 	uint64_t seen;
+	uint64_t last_connected;
 	int signal;
 
 	enum roam_trigger_state roam_state;