From e3e641dff994584cc2d1607be311be7fba6cb13f Mon Sep 17 00:00:00 2001
From: James Prestwood <james.prestwood@linux.intel.com>
Date: Fri, 9 Aug 2019 09:28:42 -0700
Subject: [PATCH] knownnetworks: add watch API's

Modules can watch for known network addition and removal.
---
 src/knownnetworks.c | 17 +++++++++++++++++
 src/knownnetworks.h | 15 +++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/src/knownnetworks.c b/src/knownnetworks.c
index ccb67310..c6d4e089 100644
--- a/src/knownnetworks.c
+++ b/src/knownnetworks.c
@@ -41,10 +41,12 @@
 #include "src/knownnetworks.h"
 #include "src/scan.h"
 #include "src/util.h"
+#include "src/watchlist.h"
 
 static struct l_queue *known_networks;
 static size_t num_known_hidden_networks;
 static struct l_dir_watch *storage_dir_watch;
+static struct watchlist known_network_watches;
 
 static void network_info_free(void *data)
 {
@@ -666,6 +668,18 @@ static void known_network_frequencies_sync(void)
 	l_settings_free(known_freqs);
 }
 
+uint32_t known_networks_watch_add(known_networks_watch_func_t func,
+					void *user_data,
+					known_networks_destroy_func_t destroy)
+{
+	return watchlist_add(&known_network_watches, func, user_data, destroy);
+}
+
+void known_networks_watch_remove(uint32_t id)
+{
+	watchlist_remove(&known_network_watches, id);
+}
+
 static int known_networks_init(void)
 {
 	struct l_dbus *dbus = dbus_get_bus();
@@ -721,6 +735,7 @@ static int known_networks_init(void)
 	storage_dir_watch = l_dir_watch_new(DAEMON_STORAGEDIR,
 						known_networks_watch_cb, NULL,
 						known_networks_watch_destroy);
+	watchlist_init(&known_network_watches, NULL);
 
 	return 0;
 }
@@ -737,6 +752,8 @@ static void known_networks_exit(void)
 	known_networks = NULL;
 
 	l_dbus_unregister_interface(dbus, IWD_KNOWN_NETWORK_INTERFACE);
+
+	watchlist_destroy(&known_network_watches);
 }
 
 IWD_MODULE(known_networks, known_networks_init, known_networks_exit)
diff --git a/src/knownnetworks.h b/src/knownnetworks.h
index 06799a73..c4f7ba7c 100644
--- a/src/knownnetworks.h
+++ b/src/knownnetworks.h
@@ -24,9 +24,19 @@ enum security;
 struct network_info;
 struct scan_freq_set;
 
+enum known_networks_event {
+	KNOWN_NETWORKS_EVENT_ADDED,
+	KNOWN_NETWORKS_EVENT_REMOVED,
+};
+
 typedef bool (*known_networks_foreach_func_t)(const struct network_info *info,
 						void *user_data);
 
+typedef void (*known_networks_watch_func_t)(enum known_networks_event event,
+						const struct network_info *info,
+						void *user_data);
+typedef void (*known_networks_destroy_func_t)(void *user_data);
+
 struct known_frequency {
 	uint32_t frequency;
 };
@@ -43,3 +53,8 @@ const char *known_network_get_path(const struct network_info *network);
 struct scan_freq_set *known_networks_get_recent_frequencies(
 						uint8_t num_networks_tosearch);
 int known_network_add_frequency(struct network_info *info, uint32_t frequency);
+
+uint32_t known_networks_watch_add(known_networks_watch_func_t func,
+					void *user_data,
+					known_networks_destroy_func_t destroy);
+void known_networks_watch_remove(uint32_t id);