summaryrefslogtreecommitdiffstats
path: root/serial/port.c
diff options
context:
space:
mode:
authorLuiz Augusto von Dentz <luiz.dentz@indt.org.br>2008-07-23 18:45:51 -0300
committerLuiz Augusto von Dentz <luiz.dentz@indt.org.br>2008-07-28 10:49:14 -0300
commit0df1e79ee08c64d5c5c13d281b03580583ecf5dd (patch)
treec17291674bbbf3aeee54784b67ee18c48e1e3f0b /serial/port.c
parent56f867d9b7a018d582d87f31c87d1ecb7c7a12bc (diff)
Cleanup serial manager.
Diffstat (limited to 'serial/port.c')
-rw-r--r--serial/port.c565
1 files changed, 320 insertions, 245 deletions
diff --git a/serial/port.c b/serial/port.c
index f0563244..7edd5301 100644
--- a/serial/port.c
+++ b/serial/port.c
@@ -31,6 +31,7 @@
#include <stdlib.h>
#include <string.h>
#include <termios.h>
+#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
@@ -46,359 +47,433 @@
#include "../hcid/dbus-common.h"
#include "logging.h"
+#include "glib-helper.h"
#include "error.h"
#include "manager.h"
#include "storage.h"
#define SERIAL_PORT_INTERFACE "org.bluez.serial.Port"
+#define ERROR_INVALID_ARGS "org.bluez.Error.InvalidArguments"
+#define ERROR_DOES_NOT_EXIST "org.bluez.Error.DoesNotExist"
-struct rfcomm_node {
- int16_t id; /* RFCOMM device id */
+#define MAX_OPEN_TRIES 5
+#define OPEN_WAIT 300 /* ms */
+
+struct serial_device {
+ DBusConnection *conn; /* for name listener handling */
bdaddr_t src; /* Source (local) address */
bdaddr_t dst; /* Destination address */
- char *svcname; /* RFCOMM service name */
- char *device; /* RFCOMM device name */
- DBusConnection *conn; /* for name listener handling */
- char *owner; /* Bus name */
- GIOChannel *io; /* Connected node IO Channel */
- guint io_id; /* IO Channel ID */
+ char *path; /* Device path */
+ GSList *ports; /* Available ports */
+};
+
+struct serial_port {
+ DBusMessage *msg; /* for name listener handling */
+ int16_t id; /* RFCOMM device id */
+ uint8_t channel; /* RFCOMM channel */
+ char *name; /* service friendly name */
+ char *uuid; /* service identification */
+ char *dev; /* RFCOMM device name */
guint listener_id;
+ struct serial_device *device;
};
-static GSList *connected_nodes = NULL;
-static GSList *bound_nodes = NULL;
+static GSList *devices = NULL;
-static struct rfcomm_node *find_node_by_name(GSList *nodes, const char *dev)
+static struct serial_device *find_device(GSList *devices, const char *path)
{
GSList *l;
- for (l = nodes; l != NULL; l = l->next) {
- struct rfcomm_node *node = l->data;
- if (!strcmp(node->device, dev))
- return node;
+ for (l = devices; l != NULL; l = l->next) {
+ struct serial_device *device = l->data;
+
+ if (!strcmp(device->path, path))
+ return device;
}
return NULL;
}
-static DBusMessage *port_get_address(DBusConnection *conn,
- DBusMessage *msg, void *data)
+static struct serial_port *find_port(GSList *ports, const char *pattern)
{
- struct rfcomm_node *node = data;
- DBusMessage *reply;
- char bda[18];
- const char *pbda = bda;
-
- reply = dbus_message_new_method_return(msg);
- if (!reply)
- return NULL;
-
- ba2str(&node->dst, bda);
- dbus_message_append_args(reply,
- DBUS_TYPE_STRING, &pbda,
- DBUS_TYPE_INVALID);
-
- return reply;
-}
+ GSList *l;
-static DBusMessage *port_get_device(DBusConnection *conn,
- DBusMessage *msg, void *data)
-{
- struct rfcomm_node *node = data;
- DBusMessage *reply;
+ for (l = ports; l != NULL; l = l->next) {
+ struct serial_port *port = l->data;
- reply = dbus_message_new_method_return(msg);
- if (!reply)
- return NULL;
+ if (!strcasecmp(port->name, pattern))
+ return port;
- dbus_message_append_args(reply,
- DBUS_TYPE_STRING, &node->device,
- DBUS_TYPE_INVALID);
+ if (!strcasecmp(port->uuid, pattern))
+ return port;
- return reply;
+ if (!strcmp(port->dev, pattern))
+ return port;
+ }
+ return NULL;
}
-static DBusMessage *port_get_adapter(DBusConnection *conn,
- DBusMessage *msg, void *data)
+static int port_release(struct serial_port *port)
{
- struct rfcomm_node *node = data;
- DBusMessage *reply;
- char addr[18];
- const char *paddr = addr;
-
- ba2str(&node->src, addr);
-
- reply = dbus_message_new_method_return(msg);
- if (!reply)
- return NULL;
+ struct rfcomm_dev_req req;
+ int rfcomm_ctl;
+ int err = 0;
+
+ debug("Serial port %s released", port->dev);
+
+ rfcomm_ctl = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_RFCOMM);
+ if (rfcomm_ctl < 0)
+ return -errno;
+
+ memset(&req, 0, sizeof(req));
+ req.dev_id = port->id;
+
+ /*
+ * We are hitting a kernel bug inside RFCOMM code when
+ * RFCOMM_HANGUP_NOW bit is set on request's flags passed to
+ * ioctl(RFCOMMRELEASEDEV)!
+ */
+ req.flags = (1 << RFCOMM_HANGUP_NOW);
+
+ if (ioctl(rfcomm_ctl, RFCOMMRELEASEDEV, &req) < 0) {
+ err = errno;
+ error("Can't release device %s: %s (%d)",
+ port->dev, strerror(err), err);
+ }
- dbus_message_append_args(reply,
- DBUS_TYPE_STRING, &paddr,
- DBUS_TYPE_INVALID);
+ g_free(port->dev);
+ port->dev = NULL;
+ port->id = 0;
+ close(rfcomm_ctl);
+ return -err;
+}
- return reply;
+static void serial_port_free(struct serial_port *port)
+{
+ if (port->id)
+ port_release(port);
+ g_free(port->name);
+ g_free(port->uuid);
+ g_free(port);
}
+static void serial_device_free(struct serial_device *device)
+{
+ g_free(device->path);
+ if (device->conn)
+ dbus_connection_unref(device->conn);
+ g_free(device);
+}
-static DBusMessage *port_get_name(DBusConnection *conn,
- DBusMessage *msg, void *data)
+static void port_owner_exited(void *user_data)
{
- struct rfcomm_node *node = data;
- DBusMessage *reply;
- const char *pname;
- char *name = NULL;
+ struct serial_port *port = user_data;
- reply = dbus_message_new_method_return(msg);
- if (!reply)
- return NULL;
+ if (port->id)
+ port_release(port);
- read_device_name(&node->src, &node->dst, &name);
+ port->listener_id = 0;
+}
- pname = (name ? name : "");
- dbus_message_append_args(reply,
- DBUS_TYPE_STRING, &pname,
- DBUS_TYPE_INVALID);
+static void path_unregister(void *data)
+{
+ struct serial_device *device = data;
- if (name)
- g_free(name);
+ info("Unregistered interface %s on path %s", SERIAL_PORT_INTERFACE,
+ device->path);
- return reply;
+ devices = g_slist_remove(devices, device);
+ serial_device_free(device);
}
-static DBusMessage *port_get_service_name(DBusConnection *conn,
- DBusMessage *msg, void *data)
+void port_release_all(void)
{
- struct rfcomm_node *node = data;
- DBusMessage *reply;
+ g_slist_foreach(devices, (GFunc) serial_device_free, NULL);
+ g_slist_free(devices);
+}
- reply = dbus_message_new_method_return(msg);
- if (!reply)
- return NULL;
+static inline DBusMessage *does_not_exist(DBusMessage *msg,
+ const char *description)
+{
+ return g_dbus_create_error(msg, ERROR_INTERFACE ".DoesNotExist",
+ description);
+}
- dbus_message_append_args(reply,
- DBUS_TYPE_STRING, &node->svcname,
- DBUS_TYPE_INVALID);
+static inline DBusMessage *invalid_arguments(DBusMessage *msg,
+ const char *description)
+{
+ return g_dbus_create_error(msg, ERROR_INTERFACE ".InvalidArguments",
+ description);
+}
- return reply;
+static inline DBusMessage *failed(DBusMessage *msg, const char *description)
+{
+ return g_dbus_create_error(msg, ERROR_INTERFACE ".Failed",
+ description);
}
-static DBusMessage *port_get_info(DBusConnection *conn,
- DBusMessage *msg, void *data)
+static void open_notify(int fd, int err, struct serial_port *port)
{
- struct rfcomm_node *node = data;
+ struct serial_device *device = port->device;
DBusMessage *reply;
- DBusMessageIter iter, dict;
- char bda[18];
- const char *pbda = bda;
-
- reply = dbus_message_new_method_return(msg);
- if (!reply)
- return NULL;
-
- dbus_message_iter_init_append(reply, &iter);
-
- dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY,
- DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING
- DBUS_TYPE_STRING_AS_STRING DBUS_TYPE_VARIANT_AS_STRING
- DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &dict);
-
- dbus_message_iter_append_dict_entry(&dict, "device",
- DBUS_TYPE_STRING, &node->device);
- ba2str(&node->dst, bda);
- dbus_message_iter_append_dict_entry(&dict, "address",
- DBUS_TYPE_STRING, &pbda);
-
- dbus_message_iter_close_container(&iter, &dict);
+ if (err) {
+ /* Max tries exceeded */
+ port_release(port);
+ reply = failed(port->msg, strerror(err));
+ } else {
+ reply = g_dbus_create_reply(port->msg,
+ DBUS_TYPE_STRING, &port->dev,
+ DBUS_TYPE_INVALID);
+ }
- return reply;
+ /* Reply to the requestor */
+ g_dbus_send_message(device->conn, reply);
}
-static GDBusMethodTable port_methods[] = {
- { "GetAddress", "", "s", port_get_address },
- { "GetDevice", "", "s", port_get_device },
- { "GetAdapter", "", "s", port_get_adapter },
- { "GetName", "", "s", port_get_name },
- { "GetServiceName", "", "s", port_get_service_name },
- { "GetInfo", "", "a{sv}",port_get_info },
- { NULL, NULL, NULL, NULL },
-};
-
-static GDBusSignalTable port_signals[] = {
- { NULL, NULL }
-};
-
-static void rfcomm_node_free(struct rfcomm_node *node)
+static gboolean open_continue(struct serial_port *port)
{
- if (node->device)
- g_free(node->device);
- if (node->conn)
- dbus_connection_unref(node->conn);
- if (node->owner)
- g_free(node->owner);
- if (node->svcname)
- g_free(node->svcname);
- if (node->io) {
- g_source_remove(node->io_id);
- g_io_channel_close(node->io);
- g_io_channel_unref(node->io);
+ int fd;
+ static int ntries = MAX_OPEN_TRIES;
+
+ if (!port->listener_id)
+ return FALSE; /* Owner exited */
+
+ fd = open(port->dev, O_RDONLY | O_NOCTTY);
+ if (fd < 0) {
+ int err = errno;
+ error("Could not open %s: %s (%d)",
+ port->dev, strerror(err), err);
+ if (!--ntries) {
+ /* Reporting error */
+ open_notify(fd, err, port);
+ ntries = MAX_OPEN_TRIES;
+ return FALSE;
+ }
+ return TRUE;
}
- rfcomm_release(node->id);
- g_free(node);
+
+ /* Connection succeeded */
+ open_notify(fd, 0, port);
+ return FALSE;
}
-static void connection_owner_exited(void *user_data)
+static int port_open(struct serial_port *port)
{
- struct rfcomm_node *node = user_data;
+ int fd;
- debug("Connect requestor exited. Releasing %s node",
- node->device);
-
- g_dbus_emit_signal(node->conn, SERIAL_MANAGER_PATH,
- SERIAL_MANAGER_INTERFACE, "ServiceDisconnected" ,
- DBUS_TYPE_STRING, &node->device,
- DBUS_TYPE_INVALID);
+ fd = open(port->dev, O_RDONLY | O_NOCTTY);
+ if (fd < 0) {
+ g_timeout_add(OPEN_WAIT, (GSourceFunc) open_continue, port);
+ return -EINPROGRESS;
+ }
- connected_nodes = g_slist_remove(connected_nodes, node);
- rfcomm_node_free(node);
+ return fd;
}
-static gboolean rfcomm_disconnect_cb(GIOChannel *io,
- GIOCondition cond, struct rfcomm_node *node)
+static void rfcomm_connect_cb(GIOChannel *chan, int err_cb, const bdaddr_t *src,
+ const bdaddr_t *dst, gpointer user_data)
{
- debug("RFCOMM node %s was disconnected", node->device);
+ struct serial_port *port = user_data;
+ struct serial_device *device = port->device;
+ struct rfcomm_dev_req req;
+ int sk, err, fd;
+ DBusMessage *reply;
- g_dbus_remove_watch(node->conn, node->listener_id);
+ /* Owner exited? */
+ if (!port->listener_id)
+ return;
- g_dbus_emit_signal(node->conn, SERIAL_MANAGER_PATH,
- SERIAL_MANAGER_INTERFACE, "ServiceDisconnected" ,
- DBUS_TYPE_STRING, &node->device,
- DBUS_TYPE_INVALID);
+ if (err_cb < 0) {
+ error("connect(): %s (%d)", strerror(-err_cb), -err_cb);
+ reply = failed(port->msg, strerror(-err_cb));
+ goto fail;
+ }
- connected_nodes = g_slist_remove(connected_nodes, node);
- rfcomm_node_free(node);
+ memset(&req, 0, sizeof(req));
+ req.dev_id = -1;
+ req.flags = (1 << RFCOMM_REUSE_DLC);
+ bacpy(&req.src, &device->src);
+ bacpy(&req.dst, &device->dst);
+ req.channel = port->channel;
+
+ sk = g_io_channel_unix_get_fd(chan);
+ port->id = ioctl(sk, RFCOMMCREATEDEV, &req);
+ g_io_channel_close(chan);
+ g_io_channel_unref(chan);
+ if (port->id < 0) {
+ err = errno;
+ error("ioctl(RFCOMMCREATEDEV): %s (%d)", strerror(err), err);
+ reply = failed(port->msg, strerror(-err_cb));
+ goto fail;
+ }
+ port->dev = g_strdup_printf("/dev/rfcomm%d", port->id);
- return FALSE;
-}
+ debug("Serial port %s created", port->dev);
-static void port_handler_unregister(void *data)
-{
- struct rfcomm_node *node = data;
+ /* Addressing connect port */
+ fd = port_open(port);
+ if (fd < 0)
+ /* Open in progress: Wait the callback */
+ return;
- debug("Unregistered serial port: %s", node->device);
+ open_notify(fd, 0, port);
+ return;
- bound_nodes = g_slist_remove(bound_nodes, node);
- rfcomm_node_free(node);
+fail:
+ g_dbus_send_message(device->conn, reply);
+ g_dbus_remove_watch(device->conn, port->listener_id);
+ port->listener_id = 0;
}
-void port_add_listener(DBusConnection *conn, int16_t id, bdaddr_t *dst,
- int fd, const char *dev, const char *owner)
+static DBusMessage *port_connect(DBusConnection *conn,
+ DBusMessage *msg, void *user_data)
{
- struct rfcomm_node *node;
-
- node = g_new0(struct rfcomm_node, 1);
- bacpy(&node->dst, dst);
- node->id = id;
- node->device = g_strdup(dev);
- node->conn = dbus_connection_ref(conn);
- node->owner = g_strdup(owner);
- node->io = g_io_channel_unix_new(fd);
- node->io_id = g_io_add_watch(node->io, G_IO_ERR | G_IO_NVAL | G_IO_HUP,
- (GIOFunc) rfcomm_disconnect_cb, node);
-
- connected_nodes = g_slist_append(connected_nodes, node);
-
- /* Service connection listener */
- node->listener_id = g_dbus_add_disconnect_watch(conn, owner,
- connection_owner_exited, node,
- NULL);
-}
+ struct serial_device *device = user_data;
+ struct serial_port *port;
+ const char *uuid;
+ int err;
-int port_remove_listener(const char *owner, const char *dev)
-{
- struct rfcomm_node *node;
+ if (dbus_message_get_args(msg, NULL, DBUS_TYPE_STRING, &uuid,
+ DBUS_TYPE_INVALID) == FALSE)
+ return NULL;
- node = find_node_by_name(connected_nodes, dev);
- if (!node)
- return -ENOENT;
- if (strcmp(node->owner, owner) != 0)
- return -EPERM;
+ port = find_port(device->ports, uuid);
+ if (!port)
+ return does_not_exist(msg, "Does not match");
- g_dbus_remove_watch(node->conn, node->listener_id);
+ if (port->listener_id)
+ return failed(msg, "Port already in use");
- connected_nodes = g_slist_remove(connected_nodes, node);
- rfcomm_node_free(node);
+ port->listener_id = g_dbus_add_disconnect_watch(conn,
+ dbus_message_get_sender(msg),
+ port_owner_exited, port,
+ NULL);
+ port->msg = dbus_message_ref(msg);
+
+ err = bt_rfcomm_connect(&device->src, &device->dst, port->channel,
+ rfcomm_connect_cb, port);
+ if (err < 0) {
+ error("RFCOMM connect failed: %s(%d)", strerror(-err), -err);
+ g_dbus_remove_watch(conn, port->listener_id);
+ port->listener_id = 0;
+ return failed(msg, strerror(-err));
+ }
- return 0;
+ return NULL;
}
-void port_release_all(void)
+static DBusMessage *port_disconnect(DBusConnection *conn,
+ DBusMessage *msg, void *user_data)
{
- struct rfcomm_node *node;
- GSList *l;
+ struct serial_device *device = user_data;
+ struct serial_port *port;
+ const char *dev;
- for (l = connected_nodes; l; l = l->next) {
- node = l->data;
+ if (dbus_message_get_args(msg, NULL, DBUS_TYPE_STRING, &dev,
+ DBUS_TYPE_INVALID) == FALSE)
+ return NULL;
- connected_nodes = g_slist_remove(connected_nodes, node);
- rfcomm_node_free(node);
- }
-}
+ port = find_port(device->ports, dev);
+ if (!port)
+ return does_not_exist(msg, "Port does not exist");
-int port_register(DBusConnection *conn, int16_t id, bdaddr_t *src,
- bdaddr_t *dst, const char *dev, char *ppath, const char *svc)
-{
- char path[MAX_PATH_LENGTH];
- struct rfcomm_node *node;
+ if (!port->listener_id)
+ return failed(msg, "Not connected");
+
+ if (port->id)
+ port_release(port);
- node = g_new0(struct rfcomm_node, 1);
- bacpy(&node->dst, dst);
- bacpy(&node->src, src);
- node->id = id;
- node->device = g_strdup(dev);
- node->conn = dbus_connection_ref(conn);
- node->svcname = g_strdup(svc?:"Bluetooth RFCOMM port");
+ g_dbus_remove_watch(conn, port->listener_id);
+ port->listener_id = 0;
- snprintf(path, MAX_PATH_LENGTH, "%s/rfcomm%hd", SERIAL_MANAGER_PATH, id);
+ return g_dbus_create_reply(msg, DBUS_TYPE_INVALID);
+}
+static GDBusMethodTable port_methods[] = {
+ { "Connect", "s", "s", port_connect, G_DBUS_METHOD_FLAG_ASYNC },
+ { "Disconnect", "s", "", port_disconnect },
+ { }
+};
+
+static struct serial_device *create_serial_device(DBusConnection *conn,
+ const char *path, bdaddr_t *src,
+ bdaddr_t *dst)
+{
+ struct serial_device *device;
+
+ device = g_new0(struct serial_device, 1);
+ device->conn = dbus_connection_ref(conn);
+ bacpy(&device->dst, dst);
+ bacpy(&device->src, src);
+ device->path = g_strdup(path);
if (!g_dbus_register_interface(conn, path,
SERIAL_PORT_INTERFACE,
- port_methods, port_signals, NULL,
- node, port_handler_unregister)) {
+ port_methods, NULL, NULL,
+ device, path_unregister)) {
error("D-Bus failed to register %s interface",
SERIAL_PORT_INTERFACE);
- rfcomm_node_free(node);
- return -1;
+ serial_device_free(device);
+ return NULL;
}
- info("Registered RFCOMM:%s, path:%s", dev, path);
+ info("Registered interface %s on path %s",
+ SERIAL_PORT_INTERFACE, path);
- if (ppath)
- strcpy(ppath, path);
+ return device;
+}
- bound_nodes = g_slist_append(bound_nodes, node);
+int port_register(DBusConnection *conn, const char *path, bdaddr_t *src,
+ bdaddr_t *dst, const char *name, const char *uuid,
+ uint8_t channel)
+{
+ struct serial_device *device;
+ struct serial_port *port;
+
+ device = find_device(devices, path);
+ if (!device) {
+ device = create_serial_device(conn, path, src, dst);
+ if (!device)
+ return -1;
+ devices = g_slist_append(devices, device);
+ }
+
+ if (find_port(device->ports, uuid))
+ return 0;
+
+ port = g_new0(struct serial_port, 1);
+ port->name = g_strdup(name);
+ port->uuid = g_strdup(uuid);
+ port->channel = channel;
+ port->device = device;
+
+ device->ports = g_slist_append(device->ports, port);
return 0;
}
-int port_unregister(const char *path)
+int port_unregister(const char *path, const char *uuid)
{
- struct rfcomm_node *node;
- char dev[16];
- int16_t id;
+ struct serial_device *device;
+ struct serial_port *port;
- if (sscanf(path, SERIAL_MANAGER_PATH"/rfcomm%hd", &id) != 1)
+ device = find_device(devices, path);
+ if (!device)
return -ENOENT;
- snprintf(dev, sizeof(dev), "/dev/rfcomm%hd", id);
- node = find_node_by_name(bound_nodes, dev);
- if (!node)
+ port = find_port(device->ports, uuid);
+ if (!port)
return -ENOENT;
- g_dbus_unregister_interface(node->conn, path, SERIAL_PORT_INTERFACE);
+ device->ports = g_slist_remove(device->ports, port);
+ serial_port_free(port);
+ if (device->ports)
+ return 0;
+
+ g_dbus_unregister_interface(device->conn, path, SERIAL_PORT_INTERFACE);
return 0;
}