genode_c_api/socket: add label to socket init

Add label argument to genode_socket_init that can be/is used to label
possible connecions.

issue #5471

repos/dde_linux/src/lib/lxip/init.cc

@@ -89,11 +89,14 @@ struct Main
 
 
 void genode_socket_init(struct genode_env *_env,
-                        struct genode_socket_io_progress *io_progress)
+                        struct genode_socket_io_progress *io_progress,
+                        char const *label)
 {
 	Env &env = *static_cast<Env *>(_env);
 	static Main main { env, io_progress };
 
+	socket_label(label);
+
 	Lx_kit::initialize(env, main.schedule_handler);
 
 	main.init();

repos/dde_linux/src/lib/lxip/net_driver.c

@@ -202,7 +202,8 @@ static int __init virtio_net_driver_init(void)
 
 	dev->netdev_ops = &net_ops;
 
-	dev->ifalias = (struct dev_ifalias *)genode_nic_client_create("");
+	dev->ifalias = (struct dev_ifalias *)
+	               genode_nic_client_create(socket_nic_client_label());
 
 	if (!dev->ifalias) {
 		printk("Failed to create nic client\n");

repos/dde_linux/src/lib/lxip/net_driver.h

@@ -29,6 +29,10 @@ extern "C" {
 	void socket_config_address(void);
 	void socket_unconfigure_address(void);
 	void socket_update_link_state(void);
+
+	void socket_label(char const *);
+	char const *socket_nic_client_label(void);
+
 #ifdef __cplusplus
 }
 #endif

repos/dde_linux/src/lib/lxip/socket.cc

@@ -37,10 +37,11 @@ using Socket_queue = Fifo<Lx_call>;
 
 struct Statics
 {
-	genode_socket_wakeup *wakeup_remote { nullptr };
-	genode_socket_config  config{ };
-	bool                  address_configured { false };
-	bool                  address_valid      { false };
+	genode_socket_wakeup        *wakeup_remote { nullptr };
+	genode_socket_config         config{ };
+	bool                         address_configured { false };
+	bool                         address_valid      { false };
+	Constructible<Session_label> label { };
 };
 
 
@@ -801,3 +802,20 @@ void socket_update_link_state(void)
 	else
 		statics().address_configured = false;
 }
+
+
+void socket_label(char const *label)
+{
+	if (statics().label.constructed()) return;
+
+	statics().label.construct(label);
+}
+
+
+char const *socket_nic_client_label()
+{
+	if (statics().label.constructed())
+		return statics().label->string();
+
+	return "";
+}

repos/dde_linux/src/test/ip_raw/client/main.cc

@@ -72,7 +72,7 @@ struct Test::Client
 
 	Client(Env &env) : env(env)
 	{
-		genode_socket_init(genode_env_ptr(env), nullptr);
+		genode_socket_init(genode_env_ptr(env), nullptr, "");
 
 		_wakeup.data     = this;
 		_wakeup.callback = _wakeup_remote;

repos/dde_linux/src/test/ip_raw/server/main.cc

@@ -81,7 +81,7 @@ struct Test::Server
 
 	Server(Env &env) : env(env)
 	{
-		genode_socket_init(genode_env_ptr(env), nullptr);
+		genode_socket_init(genode_env_ptr(env), nullptr, "");
 
 		_wakeup.data     = this;
 		_wakeup.callback = _wakeup_remote;

repos/libports/src/lib/lwip/include/nic_netif.h

@@ -24,7 +24,7 @@ struct genode_netif_handle;
 struct genode_socket_config;
 struct genode_socket_info;
 
-struct genode_netif_handle *lwip_genode_netif_init(void);
+struct genode_netif_handle *lwip_genode_netif_init(char const *label);
 
 void lwip_genode_netif_address(struct genode_netif_handle  *handle,
                                struct genode_socket_config *config);

repos/libports/src/lib/lwip/nic_netif.c

@@ -193,7 +193,7 @@ static void  nic_netif_status_callback(struct netif *netif)
  * public functions of this module
  */
 
-struct genode_netif_handle *lwip_genode_netif_init(void)
+struct genode_netif_handle *lwip_genode_netif_init(char const *label)
 {
 	ip4_addr_t v4dummy;
 	IP4_ADDR(&v4dummy, 0, 0, 0, 0);
@@ -215,7 +215,7 @@ struct genode_netif_handle *lwip_genode_netif_init(void)
 		return NULL;
 	}
 
-	handle->nic_handle         = genode_nic_client_create("");
+	handle->nic_handle         = genode_nic_client_create(label);
 	handle->netif              = net;
 	handle->address_valid      = false;
 	handle->address_configured = false;

repos/libports/src/lib/lwip/socket.cc

@@ -89,7 +89,7 @@ struct Socket::Main
 			statics().io_progress->callback(statics().io_progress->data);
 	}
 
-	Main(Env &env) : _env(env)
+	Main(Env &env, char const *label) : _env(env)
 	{
 		statics().heap = &_heap;
 
@@ -101,7 +101,7 @@ struct Socket::Main
 		Lwip::genode_init(_heap, _timer);
 
 		/* create lwIP-network interface */
-		statics().netif_ptr = lwip_genode_netif_init();
+		statics().netif_ptr = lwip_genode_netif_init(label);
 	}
 
 	void handle_nic_client()
@@ -344,14 +344,15 @@ void genode_socket_wait_for_progress()
 
 
 void genode_socket_init(struct genode_env *_env,
-                        struct genode_socket_io_progress *io_progress)
+                        struct genode_socket_io_progress *io_progress,
+                        char const *label)
 {
 	Genode::Env &env = *static_cast<Genode::Env *>(_env);
 
 	statics().env         = &env;
 	statics().io_progress = io_progress;
 
-	static Socket::Main main { env };
+	static Socket::Main main { env, label };
 }
 
 

repos/os/include/genode_c_api/socket.h

@@ -156,7 +156,8 @@ struct genode_socket_io_progress
 
 
 void genode_socket_init(struct genode_env *env,
-                        struct genode_socket_io_progress *);
+                        struct genode_socket_io_progress *,
+                        char const *label);
 
 
 /*

repos/os/src/lib/vfs/ip/vfs.cc

@@ -1996,7 +1996,10 @@ struct Ip_factory : Vfs::File_system_factory
 		io_progress.data = &env;
 		io_progress.callback = socket_progress;
 
-		genode_socket_init(genode_env_ptr(env.env()), &io_progress);
+		using Label = Genode::String<Genode::Session_label::capacity()>;
+
+		genode_socket_init(genode_env_ptr(env.env()), &io_progress,
+		                   config.attribute_value("label", Label("")).string());
 
 		return new (env.alloc()) Vfs::Ip_file_system(env, config);
 	}