[PATCH 12/16] dpp: replace SharedCodeAgent with DeviceProvisioningAgent

[James Prestwood <prestwoj@gmail.com>]

This fully removes the SharedCodeAgent which was specific to the PKEX
protocol and replaces it with the more generalized
DeviceProvisioningAgent. The new agent should still implement the
shared code method and effectively behave no differently in that
regard.

The main difference as far as the API is the new agent must be
registered via the AgentManager interface, not passed in via the
method arguments to ConfigureEnrollee().
---
 src/dpp.c | 63 ++++++++++++-------------------------------------------
 1 file changed, 13 insertions(+), 50 deletions(-)

diff --git a/src/dpp.c b/src/dpp.c
index 7b700018..d1912eaf 100644
--- a/src/dpp.c
+++ b/src/dpp.c
@@ -106,13 +106,6 @@ enum dpp_interface {
 	DPP_INTERFACE_PKEX,
 };
 
-struct pkex_agent {
-	char *owner;
-	char *path;
-	unsigned int disconnect_watch;
-	uint32_t pending_id;
-};
-
 struct dpp_sm {
 	struct netdev *netdev;
 	char *uri;
@@ -140,7 +133,6 @@ struct dpp_sm {
 	enum dpp_interface interface;
 
 	uint32_t agent_request_id;
-	struct pkex_agent *agent;
 
 	/*
 	 * List of frequencies to jump between. The presence of this list is
@@ -2088,7 +2080,7 @@ static void dpp_offchannel_timeout(int error, void *user_data)
 
 	switch (dpp->state) {
 	case DPP_STATE_PKEX_EXCHANGE:
-		if (dpp->role != DPP_CAPABILITY_CONFIGURATOR || !dpp->agent)
+		if (dpp->role != DPP_CAPABILITY_CONFIGURATOR || !dpp_agent_name)
 			break;
 
 		/*
@@ -2097,7 +2089,7 @@ static void dpp_offchannel_timeout(int error, void *user_data)
 		 * for our response so cancel the request and continue waiting
 		 * for another request
 		 */
-		if (dpp->agent->pending_id) {
+		if (dpp->agent_request_id) {
 			dpp_free_pending_pkex_data(dpp);
 			dpp_agent_cancel(dpp);
 		}
@@ -3228,10 +3220,10 @@ static void dpp_pkex_agent_reply(struct l_dbus_message *message,
 	const char *error, *text;
 	const char *code;
 
-	dpp->agent->pending_id = 0;
+	dpp->agent_request_id = 0;
 
-	l_debug("SharedCodeAgent %s path %s replied", dpp->agent->owner,
-			dpp->agent->path);
+	l_debug("DeviceProvisioningAgent %s path %s replied", dpp_agent_name,
+			dpp_agent_path);
 
 	if (l_dbus_message_get_error(message, &error, &text)) {
 		l_error("RequestSharedCode(%s) returned %s(\"%s\")",
@@ -3240,7 +3232,7 @@ static void dpp_pkex_agent_reply(struct l_dbus_message *message,
 	}
 
 	if (!l_dbus_message_get_arguments(message, "s", &code)) {
-		l_debug("Invalid arguments, check SharedCodeAgent!");
+		l_debug("Invalid arguments, check DeviceProvisioningAgent!");
 		goto reset;
 	}
 
@@ -3257,25 +3249,25 @@ static bool dpp_pkex_agent_request(struct dpp_sm *dpp)
 {
 	struct l_dbus_message *msg;
 
-	if (!dpp->agent)
+	if (!dpp_agent_name)
 		return false;
 
-	if (L_WARN_ON(dpp->agent->pending_id))
+	if (L_WARN_ON(dpp->agent_request_id))
 		return false;
 
 	msg = l_dbus_message_new_method_call(dbus_get_bus(),
-						dpp->agent->owner,
-						dpp->agent->path,
-						IWD_SHARED_CODE_AGENT_INTERFACE,
+						dpp_agent_name,
+						dpp_agent_path,
+						IWD_DPP_AGENT_INTERFACE,
 						"RequestSharedCode");
 	l_dbus_message_set_arguments(msg, "s", dpp->pkex_id);
 
 
-	dpp->agent->pending_id = l_dbus_send_with_reply(dbus_get_bus(),
+	dpp->agent_request_id = l_dbus_send_with_reply(dbus_get_bus(),
 							msg,
 							dpp_pkex_agent_reply,
 							dpp, NULL);
-	return dpp->agent->pending_id != 0;
+	return dpp->agent_request_id != 0;
 }
 
 static void dpp_handle_pkex_exchange_request(struct dpp_sm *dpp,
@@ -4648,32 +4640,6 @@ invalid_args:
 	return dbus_error_invalid_args(message);
 }
 
-static void pkex_agent_disconnect(struct l_dbus *dbus, void *user_data)
-{
-	struct dpp_sm *dpp = user_data;
-
-	l_debug("SharedCodeAgent %s disconnected", dpp->agent->path);
-
-	dpp_reset(dpp);
-}
-
-static void dpp_create_agent(struct dpp_sm *dpp, const char *path,
-					struct l_dbus_message *message)
-{
-	const char *sender = l_dbus_message_get_sender(message);
-
-	dpp->agent = l_new(struct pkex_agent, 1);
-	dpp->agent->owner = l_strdup(sender);
-	dpp->agent->path = l_strdup(path);
-	dpp->agent->disconnect_watch = l_dbus_add_disconnect_watch(
-							dbus_get_bus(),
-							sender,
-							pkex_agent_disconnect,
-							dpp, NULL);
-
-	l_debug("Registered a SharedCodeAgent on path %s", path);
-}
-
 static struct l_dbus_message *dpp_start_pkex_configurator(struct dpp_sm *dpp,
 					const char *key, const char *identifier,
 					const char *agent_path,
@@ -4708,9 +4674,6 @@ static struct l_dbus_message *dpp_start_pkex_configurator(struct dpp_sm *dpp,
 	if (key)
 		dpp->pkex_key = l_strdup(key);
 
-	if (agent_path)
-		dpp_create_agent(dpp, agent_path, message);
-
 	dpp->role = DPP_CAPABILITY_CONFIGURATOR;
 	dpp->state = DPP_STATE_PKEX_EXCHANGE;
 	dpp->interface = DPP_INTERFACE_PKEX;
-- 
2.34.1