Moving the adapter naming allows us to use the /etc/machine-info [1] pretty hostname, as implemented by hostnamed [2] in systemd. If /etc/machine-info is not present, the adapter name stored on disk in /var/lib/bluetooth will be used. If no adapter name has been set yet, the default from the main.conf will be used. We don't currently number the name of hci0 if a pretty name is available, but we should instead number it if it happens not to be the default adapter. As we cannot be told when the default adapter changes, we'll behave this way for now. Note that when an adapter name is set automatically from the pretty hostname, changing it through the D-Bus interface will fail. [1]: http://0pointer.de/public/systemd-man/machine-info.html [2]: http://www.freedesktop.org/wiki/Software/systemd/hostnamed --- Makefile.am | 3 + configure.ac | 4 + plugins/adaptername.c | 296 +++++++++++++++++++++++++++++++++++++++++++++++++ src/adapter.c | 119 +++++--------------- src/adapter.h | 4 +- src/manager.c | 5 + src/manager.h | 1 + 7 files changed, 340 insertions(+), 92 deletions(-) create mode 100644 plugins/adaptername.c diff --git a/Makefile.am b/Makefile.am index c2a6976..ba9a89d 100644 --- a/Makefile.am +++ b/Makefile.am @@ -218,6 +218,9 @@ EXTRA_DIST += plugins/hal.c plugins/formfactor.c builtin_modules += storage builtin_sources += plugins/storage.c +builtin_modules += adaptername +builtin_sources += plugins/adaptername.c + if MAEMO6PLUGIN builtin_modules += maemo6 builtin_sources += plugins/maemo6.c diff --git a/configure.ac b/configure.ac index 07b9e55..084ece5 100644 --- a/configure.ac +++ b/configure.ac @@ -35,6 +35,10 @@ AC_FUNC_PPOLL AC_CHECK_LIB(dl, dlopen, dummy=yes, AC_MSG_ERROR(dynamic linking loader is required)) +AC_CHECK_HEADER([sys/inotify.h], + [AC_DEFINE([HAVE_SYS_INOTIFY_H], 1, + [Define to 1 if you have <sys/inotify.h>.])], + [AC_MSG_ERROR(inotify headers are required and missing)]) AC_PATH_DBUS AC_PATH_GLIB AC_PATH_ALSA diff --git a/plugins/adaptername.c b/plugins/adaptername.c new file mode 100644 index 0000000..f3156fe --- /dev/null +++ b/plugins/adaptername.c @@ -0,0 +1,296 @@ +/* + * + * BlueZ - Bluetooth protocol stack for Linux + * + * Copyright (C) 2004-2010 Marcel Holtmann <marcel@xxxxxxxxxxxx> + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdlib.h> +#include <unistd.h> +#include <errno.h> + +#include <glib.h> +#include <bluetooth/bluetooth.h> + +#include "plugin.h" +#include "hcid.h" /* For main_opts */ +#include "adapter.h" +#include "manager.h" +#include "device.h" /* Needed for storage.h */ +#include "storage.h" +#include "log.h" + +#include <sys/inotify.h> +#define EVENT_SIZE (sizeof (struct inotify_event)) +#define EVENT_BUF_LEN (1024 * (EVENT_SIZE + 16)) + +#define MACHINE_INFO_DIR "/etc/" +#define MACHINE_INFO_FILE "machine-info" + +static GIOChannel *inotify = NULL; +static int watch_fd = -1; + +/* This file is part of systemd's hostnamed functionality: + * http://0pointer.de/public/systemd-man/machine-info.html + * http://www.freedesktop.org/wiki/Software/systemd/hostnamed + */ +static char *read_pretty_host_name (void) +{ + char *contents, *ret; + char **lines; + guint i; + + ret = NULL; + + if (g_file_get_contents(MACHINE_INFO_DIR MACHINE_INFO_FILE, + &contents, NULL, NULL) == FALSE) { + return NULL; + } + lines = g_strsplit_set(contents, "\r\n", 0); + g_free(contents); + + if (lines == NULL) + return NULL; + + for (i = 0; lines[i] != NULL; i++) { + if (g_str_has_prefix(lines[i], "PRETTY_HOSTNAME=")) { + ret = g_strdup(lines[i] + strlen("PRETTY_HOSTNAME=")); + break; + } + } + + g_strfreev(lines); + return ret; +} + +/* + * Device name expansion + * %d - device id + * %h - hostname + */ +static char *expand_name(char *dst, int size, char *str, int dev_id) +{ + register int sp, np, olen; + char *opt, buf[10]; + + if (!str || !dst) + return NULL; + + sp = np = 0; + while (np < size - 1 && str[sp]) { + switch (str[sp]) { + case '%': + opt = NULL; + + switch (str[sp+1]) { + case 'd': + sprintf(buf, "%d", dev_id); + opt = buf; + break; + + case 'h': + opt = main_opts.host_name; + break; + + case '%': + dst[np++] = str[sp++]; + /* fall through */ + default: + sp++; + continue; + } + + if (opt) { + /* substitute */ + olen = strlen(opt); + if (np + olen < size - 1) + memcpy(dst + np, opt, olen); + np += olen; + } + sp += 2; + continue; + + case '\\': + sp++; + /* fall through */ + default: + dst[np++] = str[sp++]; + break; + } + } + dst[np] = '\0'; + return dst; +} + +static int adaptername_probe(struct btd_adapter *adapter) +{ + int current_id; + char name[MAX_NAME_LENGTH + 1]; + char *pretty_hostname; + bdaddr_t bdaddr; + + current_id = adapter_get_dev_id(adapter); + + pretty_hostname = read_pretty_host_name(); + if (pretty_hostname != NULL) { + int default_adapter; + + default_adapter = manager_get_default_adapter(); + + /* Allow us to change the name */ + adapter_set_allow_name_changes(adapter, TRUE); + + /* If it's the first device, let's assume it will + * be the default one, as we're not told when + * the default adapter changes */ + if (default_adapter < 0) + default_adapter = current_id; + + if (default_adapter != current_id) { + char *str; + + /* +1 because we don't want an adapter called "Foobar's laptop #0" */ + str = g_strdup_printf ("%s #%d", pretty_hostname, current_id + 1); + DBG("Setting name '%s' for device 'hci%d'", str, current_id); + + adapter_update_local_name(adapter, str); + g_free(str); + } else { + DBG("Setting name '%s' for device 'hci%d'", pretty_hostname, current_id); + adapter_update_local_name(adapter, pretty_hostname); + } + g_free(pretty_hostname); + + /* And disable the name change now */ + adapter_set_allow_name_changes(adapter, FALSE); + + return 0; + } + + adapter_set_allow_name_changes(adapter, TRUE); + adapter_get_address(adapter, &bdaddr); + + if (read_local_name(&bdaddr, name) < 0) { + expand_name(name, MAX_NAME_LENGTH, main_opts.name, + current_id); + } + DBG("Setting name '%s' for device 'hci%d'", name, current_id); + adapter_update_local_name(adapter, name); + + return 0; +} + +static gboolean handle_inotify_cb(GIOChannel *channel, + GIOCondition condition, gpointer data) +{ + char buf[EVENT_BUF_LEN]; + GIOStatus err; + gsize len, i; + gboolean changed; + + changed = FALSE; + + err = g_io_channel_read_chars(channel, buf, EVENT_BUF_LEN, &len, NULL); + if (err != G_IO_STATUS_NORMAL) { + error("Error reading inotify event: %d\n", err); + return FALSE; + } + + i = 0; + while (i < len) { + struct inotify_event *pevent = (struct inotify_event *) & buf[i]; + + /* check that it's ours */ + if (pevent->len && + pevent->name != NULL && + strcmp(pevent->name, MACHINE_INFO_FILE) == 0) { + changed = TRUE; + } + i += EVENT_SIZE + pevent->len; + } + + if (changed != FALSE) { + DBG(MACHINE_INFO_DIR MACHINE_INFO_FILE + " changed, changing names for adapters"); + manager_foreach_adapter ((adapter_cb) adaptername_probe, NULL); + } + + return TRUE; +} + +static void adaptername_remove(struct btd_adapter *adapter) +{ + if (watch_fd >= 0) + close (watch_fd); + if (inotify != NULL) + g_io_channel_shutdown(inotify, FALSE, NULL); +} + +static struct btd_adapter_driver adaptername_driver = { + .name = "adaptername", + .probe = adaptername_probe, + .remove = adaptername_remove, +}; + +static int adaptername_init(void) +{ + int ret; + + ret = btd_register_adapter_driver(&adaptername_driver); + + if (ret == 0) { + int inot_fd; + + inot_fd = inotify_init(); + if (inot_fd < 0) { + error("Failed to setup inotify"); + return 0; + } + watch_fd = inotify_add_watch(inot_fd, + MACHINE_INFO_DIR, + IN_CLOSE_WRITE | IN_DELETE | IN_CREATE); + if (watch_fd < 0) { + error("Failed to setup watch for '%s'", + MACHINE_INFO_DIR); + return 0; + } + + inotify = g_io_channel_unix_new(inot_fd); + g_io_channel_set_close_on_unref(inotify, TRUE); + g_io_channel_set_encoding (inotify, NULL, NULL); + g_io_channel_set_flags (inotify, G_IO_FLAG_NONBLOCK, NULL); + g_io_add_watch(inotify, G_IO_IN, handle_inotify_cb, NULL); + + return 0; + } + + return ret; +} + +static void adaptername_exit(void) +{ + btd_unregister_adapter_driver(&adaptername_driver); +} + +BLUETOOTH_PLUGIN_DEFINE(adaptername, VERSION, + BLUETOOTH_PLUGIN_PRIORITY_LOW, adaptername_init, adaptername_exit) diff --git a/src/adapter.c b/src/adapter.c index b189841..87af784 100644 --- a/src/adapter.c +++ b/src/adapter.c @@ -111,6 +111,7 @@ struct btd_adapter { bdaddr_t bdaddr; /* adapter Bluetooth Address */ uint32_t dev_class; /* Class of Device */ char name[MAX_NAME_LENGTH + 1]; /* adapter name */ + gboolean allow_name_changes; /* whether the adapter name can be changed */ guint discov_timeout_id; /* discoverable timeout id */ guint stop_discov_id; /* stop inquiry/scanning id */ uint32_t discov_timeout; /* discoverable time(sec) */ @@ -186,64 +187,6 @@ static void dev_info_free(struct remote_dev_info *dev) g_free(dev); } -/* - * Device name expansion - * %d - device id - */ -static char *expand_name(char *dst, int size, char *str, int dev_id) -{ - register int sp, np, olen; - char *opt, buf[10]; - - if (!str || !dst) - return NULL; - - sp = np = 0; - while (np < size - 1 && str[sp]) { - switch (str[sp]) { - case '%': - opt = NULL; - - switch (str[sp+1]) { - case 'd': - sprintf(buf, "%d", dev_id); - opt = buf; - break; - - case 'h': - opt = main_opts.host_name; - break; - - case '%': - dst[np++] = str[sp++]; - /* fall through */ - default: - sp++; - continue; - } - - if (opt) { - /* substitute */ - olen = strlen(opt); - if (np + olen < size - 1) - memcpy(dst + np, opt, olen); - np += olen; - } - sp += 2; - continue; - - case '\\': - sp++; - /* fall through */ - default: - dst[np++] = str[sp++]; - break; - } - } - dst[np] = '\0'; - return dst; -} - int btd_adapter_set_class(struct btd_adapter *adapter, uint8_t major, uint8_t minor) { @@ -916,10 +859,13 @@ void btd_adapter_class_changed(struct btd_adapter *adapter, uint32_t new_class) DBUS_TYPE_UINT32, &new_class); } -void adapter_update_local_name(struct btd_adapter *adapter, const char *name) +int adapter_update_local_name(struct btd_adapter *adapter, const char *name) { + if (adapter->allow_name_changes == FALSE) + return -EPERM; + if (strncmp(name, adapter->name, MAX_NAME_LENGTH) == 0) - return; + return 0; strncpy(adapter->name, name, MAX_NAME_LENGTH); @@ -938,38 +884,29 @@ void adapter_update_local_name(struct btd_adapter *adapter, const char *name) DBUS_TYPE_STRING, &name_ptr); } + if (adapter->up) { + int err = adapter_ops->set_name(adapter->dev_id, name); + if (err < 0) + return err; + + adapter->name_stored = TRUE; + } + adapter->name_stored = FALSE; + + return 0; } static DBusMessage *set_name(DBusConnection *conn, DBusMessage *msg, const char *name, void *data) { struct btd_adapter *adapter = data; - char *name_ptr = adapter->name; - - if (!g_utf8_validate(name, -1, NULL)) { - error("Name change failed: supplied name isn't valid UTF-8"); - return btd_error_invalid_args(msg); - } - - if (strncmp(name, adapter->name, MAX_NAME_LENGTH) == 0) - goto done; - - strncpy(adapter->name, name, MAX_NAME_LENGTH); - write_local_name(&adapter->bdaddr, name); - emit_property_changed(connection, adapter->path, - ADAPTER_INTERFACE, "Name", - DBUS_TYPE_STRING, &name_ptr); - - if (adapter->up) { - int err = adapter_ops->set_name(adapter->dev_id, name); - if (err < 0) - return btd_error_failed(msg, strerror(-err)); + int err; - adapter->name_stored = TRUE; - } + err = adapter_update_local_name (adapter, name); + if (err < 0) + return btd_error_failed(msg, strerror(-err)); -done: return dbus_message_new_method_return(msg); } @@ -2576,6 +2513,8 @@ gboolean adapter_init(struct btd_adapter *adapter) * start off as powered */ adapter->up = TRUE; + adapter->allow_name_changes = TRUE; + adapter_ops->read_bdaddr(adapter->dev_id, &adapter->bdaddr); if (bacmp(&adapter->bdaddr, BDADDR_ANY) == 0) { @@ -2591,14 +2530,6 @@ gboolean adapter_init(struct btd_adapter *adapter) return FALSE; } - if (read_local_name(&adapter->bdaddr, adapter->name) < 0) - expand_name(adapter->name, MAX_NAME_LENGTH, main_opts.name, - adapter->dev_id); - - if (main_opts.attrib_server) - attrib_gap_set(GATT_CHARAC_DEVICE_NAME, - (const uint8_t *) adapter->name, strlen(adapter->name)); - sdp_init_services_list(&adapter->bdaddr); load_drivers(adapter); clear_blocked(adapter); @@ -2684,6 +2615,12 @@ void adapter_get_address(struct btd_adapter *adapter, bdaddr_t *bdaddr) bacpy(bdaddr, &adapter->bdaddr); } +void adapter_set_allow_name_changes(struct btd_adapter *adapter, + gboolean allow_name_changes) +{ + adapter->allow_name_changes = allow_name_changes; +} + static inline void suspend_discovery(struct btd_adapter *adapter) { if (adapter->state != STATE_SUSPENDED) diff --git a/src/adapter.h b/src/adapter.h index 3526849..626c9ef 100644 --- a/src/adapter.h +++ b/src/adapter.h @@ -100,6 +100,8 @@ int adapter_resolve_names(struct btd_adapter *adapter); struct btd_adapter *adapter_create(DBusConnection *conn, int id); gboolean adapter_init(struct btd_adapter *adapter); void adapter_remove(struct btd_adapter *adapter); +void adapter_set_allow_name_changes(struct btd_adapter *adapter, + gboolean allow_name_changes); uint16_t adapter_get_dev_id(struct btd_adapter *adapter); const gchar *adapter_get_path(struct btd_adapter *adapter); void adapter_get_address(struct btd_adapter *adapter, bdaddr_t *bdaddr); @@ -115,7 +117,7 @@ int adapter_remove_found_device(struct btd_adapter *adapter, bdaddr_t *bdaddr); void adapter_emit_device_found(struct btd_adapter *adapter, struct remote_dev_info *dev); void adapter_mode_changed(struct btd_adapter *adapter, uint8_t scan_mode); -void adapter_update_local_name(struct btd_adapter *adapter, const char *name); +int adapter_update_local_name(struct btd_adapter *adapter, const char *name); void adapter_service_insert(struct btd_adapter *adapter, void *rec); void adapter_service_remove(struct btd_adapter *adapter, void *rec); void btd_adapter_class_changed(struct btd_adapter *adapter, diff --git a/src/manager.c b/src/manager.c index e805e0c..dedec8b 100644 --- a/src/manager.c +++ b/src/manager.c @@ -288,6 +288,11 @@ static void manager_remove_adapter(struct btd_adapter *adapter) btd_start_exit_timer(); } +int manager_get_default_adapter (void) +{ + return default_adapter_id; +} + void manager_cleanup(DBusConnection *conn, const char *path) { g_slist_foreach(adapters, (GFunc) manager_remove_adapter, NULL); diff --git a/src/manager.h b/src/manager.h index 05c38b3..90d3690 100644 --- a/src/manager.h +++ b/src/manager.h @@ -41,3 +41,4 @@ struct btd_adapter *btd_manager_register_adapter(int id); int btd_manager_unregister_adapter(int id); void manager_add_adapter(const char *path); void btd_manager_set_did(uint16_t vendor, uint16_t product, uint16_t version); +int manager_get_default_adapter (void); -- 1.7.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
