proxy: Add implementation for internal proxy framework.

Add support to call registered proxy driver and report
proxy to client.

Also Make sure we cancel proxy request if we got disconnected and still
waiting for proxy request. Also make sure we set/clear token correctly

3 files changed, 130 insertions, 13 deletions

diff --git a/include/proxy.h b/include/proxy.h
index 5dd0583b..d4b21489 100644
--- a/include/proxy.h
+++ b/include/proxy.h
@@ -37,6 +37,7 @@ extern "C" {
 typedef void (*connman_proxy_lookup_cb) (const char *proxy, void *user_data);
 
 unsigned int connman_proxy_lookup(const char *interface, const char *url,
+				struct connman_service *service,
 				connman_proxy_lookup_cb cb, void *user_data);
 void connman_proxy_lookup_cancel(unsigned int token);
 
diff --git a/plugins/portal.c b/plugins/portal.c
index 043caaf9..b2215920 100644
--- a/plugins/portal.c
+++ b/plugins/portal.c
@@ -39,6 +39,7 @@
 #define STATUS_URL  "http://www.connman.net/online/status.html"
 
 struct server_data {
+	unsigned int token;
 	GWeb *web;
 	guint request_id;
 };
@@ -105,10 +106,13 @@ static void proxy_callback(const char *proxy, void *user_data)
 		proxy = getenv("http_proxy");
 
 	if (data != NULL) {
-		g_web_set_proxy(data->web, proxy);
+		if (proxy != NULL && g_strcmp0(proxy, "DIRECT") != 0)
+			g_web_set_proxy(data->web, proxy);
 
 		data->request_id = g_web_request_get(data->web, STATUS_URL,
 							web_result, location);
+
+		data->token = 0;
 	}
 
 	connman_location_unref(location);
@@ -117,6 +121,7 @@ static void proxy_callback(const char *proxy, void *user_data)
 static int location_detect(struct connman_location *location)
 {
 	struct server_data *data;
+	struct connman_service *service;
 	enum connman_service_type service_type;
 	char *interface;
 	int err;
@@ -168,13 +173,17 @@ static int location_detect(struct connman_location *location)
 	g_web_set_user_agent(data->web, "ConnMan/%s", VERSION);
 	g_web_set_close_connection(data->web, TRUE);
 
-	err = connman_proxy_lookup(interface, STATUS_URL,
-					proxy_callback, location);
-	if (err < 0)
-		goto done;
-
 	connman_location_ref(location);
-	err = 0;
+
+	service = connman_location_get_service(location);
+	data->token = connman_proxy_lookup(interface, STATUS_URL,
+					service, proxy_callback, location);
+
+	if (data->token == 0) {
+		connman_location_unref(location);
+		err = -EINVAL;
+	} else
+		err = 0;
 
 done:
 	g_free(interface);
@@ -192,6 +201,11 @@ static int location_finish(struct connman_location *location)
 	if (data->request_id > 0)
 		g_web_cancel_request(data->web, data->request_id);
 
+	if (data->token > 0) {
+		connman_proxy_lookup_cancel(data->token);
+		connman_location_unref(location);
+	}
+
 	g_web_unref(data->web);
 
 	g_free(data);
diff --git a/src/proxy.c b/src/proxy.c
index f31e9f8e..a83837ba 100644
--- a/src/proxy.c
+++ b/src/proxy.c
@@ -30,30 +30,76 @@
 static unsigned int next_lookup_token = 1;
 
 static GSList *driver_list = NULL;
+static GSList *lookup_list = NULL;
 
 struct proxy_lookup {
 	unsigned int token;
 	connman_proxy_lookup_cb cb;
 	void *user_data;
+	struct connman_service *service;
+	char *url;
 	guint watch;
+	struct connman_proxy_driver *proxy;
 };
 
+static void remove_lookup(struct proxy_lookup *lookup)
+{
+	lookup_list = g_slist_remove(lookup_list, lookup);
+
+	g_free(lookup->url);
+	g_free(lookup);
+}
+
+static void remove_lookups(GSList *lookups)
+{
+	GSList *list;
+
+	for (list = lookups; list; list = list->next) {
+		struct proxy_lookup *lookup = list->data;
+
+		remove_lookup(lookup);
+	}
+
+	g_slist_free(lookups);
+}
+
 static gboolean lookup_callback(gpointer user_data)
 {
 	struct proxy_lookup *lookup = user_data;
+	GSList *list;
+
+	if (lookup == NULL)
+		return FALSE;
 
 	lookup->watch = 0;
 
-	if (lookup->cb)
-		lookup->cb(NULL, lookup->user_data);
+	for (list = driver_list; list; list = list->next) {
+		struct connman_proxy_driver *proxy = list->data;
 
-	g_free(lookup);
+		if (proxy->request_lookup == NULL)
+			continue;
+
+		lookup->proxy = proxy;
+		break;
+	}
+
+	if (lookup->proxy == NULL ||
+		lookup->proxy->request_lookup(lookup->service,
+						lookup->url) < 0) {
+
+		if (lookup->cb)
+			lookup->cb(NULL, lookup->user_data);
+
+		remove_lookup(lookup);
+	}
 
 	return FALSE;
 }
 
 unsigned int connman_proxy_lookup(const char *interface, const char *url,
-				connman_proxy_lookup_cb cb, void *user_data)
+					struct connman_service *service,
+					connman_proxy_lookup_cb cb,
+					void *user_data)
 {
 	struct proxy_lookup *lookup;
 
@@ -70,30 +116,74 @@ unsigned int connman_proxy_lookup(const char *interface, const char *url,
 
 	lookup->cb = cb;
 	lookup->user_data = user_data;
+	lookup->url = g_strdup(url);
+	lookup->service = service;
 
 	lookup->watch = g_timeout_add_seconds(0, lookup_callback, lookup);
 	if (lookup->watch == 0) {
+		g_free(lookup->url);
 		g_free(lookup);
 		return 0;
 	}
 
 	DBG("token %u", lookup->token);
+	lookup_list = g_slist_append(lookup_list, lookup);
 
 	return lookup->token;
 }
 
 void connman_proxy_lookup_cancel(unsigned int token)
 {
+	GSList *list;
+	struct proxy_lookup *lookup = NULL;
+
 	DBG("token %u", token);
+
+	for (list = lookup_list; list; list = list->next) {
+		lookup = list->data;
+
+		if (lookup->token == token)
+			break;
+	}
+
+	if (lookup != NULL) {
+		if (lookup->watch > 0) {
+			g_source_remove(lookup->watch);
+			lookup->watch = 0;
+		}
+
+		if (lookup->proxy != NULL &&
+					lookup->proxy->cancel_lookup != NULL)
+			lookup->proxy->cancel_lookup(lookup->service,
+								lookup->url);
+
+		remove_lookup(lookup);
+	}
 }
 
 void connman_proxy_driver_lookup_notify(struct connman_service *service,
                                         const char *url, const char *result)
 {
+	GSList *list, *matches = NULL;
+
 	DBG("service %p url %s result %s", service, url, result);
 
-	if (service == NULL)
-		return;
+	for (list = lookup_list; list; list = list->next) {
+		struct proxy_lookup *lookup = list->data;
+
+		if (service != lookup->service)
+			continue;
+
+		if (g_strcmp0(lookup->url, url) == 0) {
+			if (lookup->cb)
+				lookup->cb(result, lookup->user_data);
+
+			matches = g_slist_append(matches, lookup);
+		}
+	}
+
+	if (matches != NULL)
+		remove_lookups(matches);
 }
 
 static gint compare_priority(gconstpointer a, gconstpointer b)
@@ -130,9 +220,19 @@ int connman_proxy_driver_register(struct connman_proxy_driver *driver)
  */
 void connman_proxy_driver_unregister(struct connman_proxy_driver *driver)
 {
+	GSList *list;
+
 	DBG("driver %p name %s", driver, driver->name);
 
 	driver_list = g_slist_remove(driver_list, driver);
+
+	for (list = lookup_list; list; list = list->next) {
+		struct proxy_lookup *lookup = list->data;
+
+		if (lookup->proxy == driver)
+			lookup->proxy = NULL;
+	}
+
 }
 
 int __connman_proxy_init(void)
@@ -145,4 +245,6 @@ int __connman_proxy_init(void)
 void __connman_proxy_cleanup(void)
 {
 	DBG("");
+
+	remove_lookups(lookup_list);
 }