/* NetworkManager -- Network link manager * * Dan Williams * * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * (C) Copyright 2004 Red Hat, Inc. */ #include #include #include #include #include #include #include #include "NetworkManager.h" #include "NetworkManagerDevice.h" #include "NetworkManagerUtils.h" #include "NetworkManagerDbus.h" #include "NetworkManagerWireless.h" #include "NetworkManagerPolicy.h" #include "NetworkManagerAPList.h" #include "backends/NetworkManagerSystem.h" extern gboolean debug; /* Local static prototypes */ static gboolean mii_get_link (NMDevice *dev); static gpointer nm_device_activation_worker (gpointer user_data); /******************************************************/ /* Wireless device specific options */ typedef struct NMDeviceWirelessOptions { gchar *cur_essid; gboolean supports_wireless_scan; guint8 max_quality; guint8 noise; gint8 strength; GMutex *scan_mutex; /* We keep a couple lists around since wireless cards * are a bit flakey and don't report the same access * points every time. The lists get merged and diffed * to figure out the "real" list, but the latest_ap_list * is always the most-current scan. */ NMAccessPointList *ap_list; NMAccessPointList *cached_ap_list1; NMAccessPointList *cached_ap_list2; NMAccessPointList *cached_ap_list3; NMAccessPointList *cached_ap_list4; NMAccessPoint *best_ap; GMutex *best_ap_mutex; gboolean freeze_best_ap; gboolean user_key_received; gboolean now_scanning; } NMDeviceWirelessOptions; /* Wired device specific options */ typedef struct NMDeviceWiredOptions { int foo; } NMDeviceWiredOptions; typedef union NMDeviceOptions { NMDeviceWirelessOptions wireless; NMDeviceWiredOptions wired; } NMDeviceOptions; typedef struct NMDeviceConfigInfo { gboolean use_dhcp; guint32 ip4_gateway; guint32 ip4_address; guint32 ip4_netmask; guint32 ip4_broadcast; /* FIXME: ip6 stuff */ } NMDeviceConfigInfo; /* * NetworkManager device structure */ struct NMDevice { guint refcount; gchar *udi; gchar *iface; NMDeviceType type; gboolean link_active; guint32 ip4_address; /* FIXME: ipv6 address too */ NMData *app_data; NMDeviceOptions options; NMDeviceConfigInfo config_info; gboolean activating; /* Set by main thread before beginning activation */ gboolean just_activated; /* Set by activation thread after successful activation */ gboolean quit_activation; /* Flag to signal activation thread to stop activating */ gboolean test_device; gboolean test_device_up; }; /******************************************************/ /* * nm_device_test_wireless_extensions * * Test whether a given device is a wireless one or not. * */ static gboolean nm_device_test_wireless_extensions (NMDevice *dev) { int iwlib_socket; int error; iwstats stats; g_return_val_if_fail (dev != NULL, FALSE); /* We obviously cannot probe test devices (since they don't * actually exist in hardware). */ if (dev->test_device) return (FALSE); iwlib_socket = iw_sockets_open (); error = iw_get_stats (iwlib_socket, nm_device_get_iface (dev), &stats, NULL, FALSE); close (iwlib_socket); return (error == 0); } /* * nm_device_supports_wireless_scan * * Test whether a given device is a wireless one or not. * */ static gboolean nm_device_supports_wireless_scan (NMDevice *dev) { int iwlib_socket; int error; gboolean can_scan = TRUE; wireless_scan_head scan_data; g_return_val_if_fail (dev != NULL, FALSE); g_return_val_if_fail (dev->type == DEVICE_TYPE_WIRELESS_ETHERNET, FALSE); /* A test wireless device can always scan (we generate fake scan data for it) */ if (dev->test_device) return (TRUE); iwlib_socket = iw_sockets_open (); error = iw_scan (iwlib_socket, nm_device_get_iface (dev), WIRELESS_EXT, &scan_data); nm_dispose_scan_results (scan_data.result); if ((error == -1) && (errno == EOPNOTSUPP)) can_scan = FALSE; close (iwlib_socket); return (can_scan); } /* * nm_get_device_by_udi * * Search through the device list for a device with a given UDI. * * NOTE: the caller MUST hold the device list mutex already to make * this routine thread-safe. * */ NMDevice *nm_get_device_by_udi (NMData *data, const char *udi) { NMDevice *dev = NULL; GSList *element; g_return_val_if_fail (data != NULL, NULL); g_return_val_if_fail (udi != NULL, NULL); element = data->dev_list; while (element) { dev = (NMDevice *)(element->data); if (dev) { if (nm_null_safe_strcmp (nm_device_get_udi (dev), udi) == 0) break; } element = g_slist_next (element); } return (dev); } /* * nm_get_device_by_iface * * Search through the device list for a device with a given iface. * * NOTE: the caller MUST hold the device list mutex already to make * this routine thread-safe. * */ NMDevice *nm_get_device_by_iface (NMData *data, const char *iface) { NMDevice *iter_dev = NULL; NMDevice *found_dev = NULL; GSList *element; g_return_val_if_fail (data != NULL, NULL); g_return_val_if_fail (iface != NULL, NULL); element = data->dev_list; while (element) { iter_dev = (NMDevice *)(element->data); if (iter_dev) { if (nm_null_safe_strcmp (nm_device_get_iface (iter_dev), iface) == 0) { found_dev = iter_dev; break; } } element = g_slist_next (element); } return (found_dev); } /*****************************************************************************/ /* NMDevice object routines */ /*****************************************************************************/ /* * nm_device_new * * Creates and initializes the structure representation of an NM device. For test * devices, a device type other than DEVICE_TYPE_DONT_KNOW must be specified, this * argument is ignored for real hardware devices since they are auto-probed. * */ NMDevice *nm_device_new (const char *iface, gboolean test_dev, NMDeviceType test_dev_type, NMData *app_data) { NMDevice *dev; g_return_val_if_fail (iface != NULL, NULL); g_return_val_if_fail (strlen (iface) > 0, NULL); /* Test devices must have a valid type specified */ if (test_dev && !(test_dev_type != DEVICE_TYPE_DONT_KNOW)) return (NULL); /* Another check to make sure we don't create a test device unless * test devices were enabled on the command line. */ if (app_data && !app_data->enable_test_devices && test_dev) { syslog (LOG_ERR, "nm_device_new(): attempt to create a test device, but test devices were not enabled" " on the command line. Will not create the device.\n"); return (NULL); } dev = g_new0 (NMDevice, 1); if (!dev) { syslog (LOG_ERR, "nm_device_new() could not allocate a new device... Not enough memory?"); return (NULL); } dev->refcount = 1; dev->app_data = app_data; dev->iface = g_strdup (iface); dev->test_device = test_dev; /* Real hardware devices are probed for their type, test devices must have * their type specified. */ if (test_dev) dev->type = test_dev_type; else dev->type = nm_device_test_wireless_extensions (dev) ? DEVICE_TYPE_WIRELESS_ETHERNET : DEVICE_TYPE_WIRED_ETHERNET; /* Initialize wireless-specific options */ if (nm_device_is_wireless (dev)) { if (!(dev->options.wireless.scan_mutex = g_mutex_new ())) { g_free (dev->iface); g_free (dev); return (NULL); } if (!(dev->options.wireless.best_ap_mutex = g_mutex_new ())) { g_mutex_free (dev->options.wireless.scan_mutex); g_free (dev->iface); g_free (dev); return (NULL); } if (!(dev->options.wireless.ap_list = nm_ap_list_new (NETWORK_TYPE_DEVICE))) { g_free (dev->iface); g_mutex_free (dev->options.wireless.best_ap_mutex); g_free (dev); return (NULL); } dev->options.wireless.supports_wireless_scan = nm_device_supports_wireless_scan (dev); /* Perform an initial wireless scan */ nm_device_set_mode_managed (dev); nm_device_do_wireless_scan (dev); nm_device_update_best_ap (dev); } /* Grab IP config data for this device from the system configuration files */ nm_device_update_ip4_address (dev); nm_system_device_update_config_info (dev); /* Have to bring the device up before checking link status. */ nm_device_bring_up (dev); nm_device_update_link_active (dev, TRUE); return (dev); } /* * Refcounting functions */ void nm_device_ref (NMDevice *dev) { g_return_if_fail (dev != NULL); dev->refcount++; } void nm_device_unref (NMDevice *dev) { g_return_if_fail (dev != NULL); dev->refcount--; if (dev->refcount <= 0) { nm_device_ap_list_clear (dev); dev->options.wireless.ap_list = NULL; g_free (dev->udi); g_free (dev->iface); if (nm_device_is_wireless (dev)) { g_mutex_free (dev->options.wireless.scan_mutex); if (dev->options.wireless.ap_list) nm_ap_list_unref (dev->options.wireless.ap_list); if (dev->options.wireless.cached_ap_list1) nm_ap_list_unref (dev->options.wireless.cached_ap_list1); if (dev->options.wireless.cached_ap_list2) nm_ap_list_unref (dev->options.wireless.cached_ap_list2); if (dev->options.wireless.cached_ap_list3) nm_ap_list_unref (dev->options.wireless.cached_ap_list3); if (dev->options.wireless.cached_ap_list4) nm_ap_list_unref (dev->options.wireless.cached_ap_list4); nm_ap_unref (dev->options.wireless.best_ap); g_mutex_free (dev->options.wireless.best_ap_mutex); } dev->udi = NULL; dev->iface = NULL; g_free (dev); } } /* * Get/set functions for UDI */ char * nm_device_get_udi (NMDevice *dev) { g_return_val_if_fail (dev != NULL, NULL); return (dev->udi); } void nm_device_set_udi (NMDevice *dev, const char *udi) { g_return_if_fail (dev != NULL); g_return_if_fail (udi != NULL); if (dev->udi) g_free (dev->udi); dev->udi = g_strdup (udi); } /* * Get/set functions for iface */ char * nm_device_get_iface (NMDevice *dev) { g_return_val_if_fail (dev != NULL, NULL); return (dev->iface); } /* * Get/set functions for type */ guint nm_device_get_type (NMDevice *dev) { g_return_val_if_fail (dev != NULL, DEVICE_TYPE_DONT_KNOW); return (dev->type); } gboolean nm_device_is_wireless (NMDevice *dev) { g_return_val_if_fail (dev != NULL, FALSE); return (dev->type == DEVICE_TYPE_WIRELESS_ETHERNET); } gboolean nm_device_is_wired (NMDevice *dev) { g_return_val_if_fail (dev != NULL, FALSE); return (dev->type == DEVICE_TYPE_WIRED_ETHERNET); } /* * Get/set functions for link_active */ gboolean nm_device_get_link_active (NMDevice *dev) { g_return_val_if_fail (dev != NULL, FALSE); return (dev->link_active); } void nm_device_set_link_active (NMDevice *dev, const gboolean link_active) { g_return_if_fail (dev != NULL); dev->link_active = link_active; } /* * Get function for supports_wireless_scan */ gboolean nm_device_get_supports_wireless_scan (NMDevice *dev) { g_return_val_if_fail (dev != NULL, FALSE); if (!nm_device_is_wireless (dev)) return (FALSE); return (dev->options.wireless.supports_wireless_scan); } /* * nm_device_wireless_link_active * * Gets the link state of a wireless device * */ static gboolean nm_device_wireless_link_active (NMDevice *dev) { struct iwreq wrq; int iwlib_socket; gboolean link = FALSE; g_return_val_if_fail (dev != NULL, FALSE); g_return_val_if_fail (dev->app_data != NULL, FALSE); /* Test devices have their link state set through DBUS */ if (dev->test_device) return (nm_device_get_link_active (dev)); /* * For wireless cards, the best indicator of a "link" at this time * seems to be whether the card has a valid access point MAC address. * Is there a better way? */ iwlib_socket = iw_sockets_open (); if (iw_get_ext (iwlib_socket, nm_device_get_iface (dev), SIOCGIWAP, &wrq) >= 0) { if ( nm_ethernet_address_is_valid ((struct ether_addr *)(&(wrq.u.ap_addr.sa_data))) && nm_device_get_best_ap (dev) && !nm_device_need_ap_switch (dev)) link = TRUE; } close (iwlib_socket); return (link); } /* * nm_device_wired_link_active * * Return the link state of a wired device. We usually just grab the HAL * net.80203.link property, but on card insertion we need to check the MII * registers of the card to get a more accurate response, since HAL may not * have received a netlink socket link event for the device yet, and therefore * will return FALSE when the device really does have a link. * */ static gboolean nm_device_wired_link_active (NMDevice *dev, gboolean check_mii) { gboolean link = FALSE; g_return_val_if_fail (dev != NULL, FALSE); g_return_val_if_fail (dev->app_data != NULL, FALSE); /* Test devices have their link state set through DBUS */ if (dev->test_device) return (nm_device_get_link_active (dev)); if (check_mii) link = mii_get_link (dev); else if (hal_device_property_exists (dev->app_data->hal_ctx, nm_device_get_udi (dev), "net.80203.link")) link = hal_device_get_property_bool (dev->app_data->hal_ctx, nm_device_get_udi (dev), "net.80203.link"); return (link); } /* * nm_device_update_link_active * * Updates the link state for a particular device. * */ void nm_device_update_link_active (NMDevice *dev, gboolean check_mii) { gboolean link = FALSE; g_return_if_fail (dev != NULL); g_return_if_fail (dev->app_data != NULL); switch (nm_device_get_type (dev)) { case DEVICE_TYPE_WIRELESS_ETHERNET: link = nm_device_wireless_link_active (dev); /* Update our current signal strength too */ nm_device_update_signal_strength (dev); break; case DEVICE_TYPE_WIRED_ETHERNET: link = nm_device_wired_link_active (dev, check_mii); break; default: link = nm_device_get_link_active (dev); /* Can't get link info for this device, so don't change link status */ break; } /* Update device link status and global state variable if the status changed */ if (link != nm_device_get_link_active (dev)) { nm_device_set_link_active (dev, link); nm_data_mark_state_changed (dev->app_data); } } /* * nm_device_get_essid * * If a device is wireless, return the essid that it is attempting * to use. * * Returns: allocated string containing essid. Must be freed by caller. * */ char * nm_device_get_essid (NMDevice *dev) { int iwlib_socket; int err; g_return_val_if_fail (dev != NULL, NULL); g_return_val_if_fail (nm_device_is_wireless (dev), NULL); /* Test devices return the essid of their "best" access point * or if there is none, the contents of the cur_essid field. */ if (dev->test_device) { if (nm_device_get_best_ap (dev)) return (nm_ap_get_essid (nm_device_get_best_ap (dev))); else return (dev->options.wireless.cur_essid); } iwlib_socket = iw_sockets_open (); if (iwlib_socket >= 0) { wireless_config info; err = iw_get_basic_config(iwlib_socket, nm_device_get_iface (dev), &info); if (err >= 0) { if (dev->options.wireless.cur_essid) g_free (dev->options.wireless.cur_essid); dev->options.wireless.cur_essid = g_strdup (info.essid); } else syslog (LOG_ERR, "nm_device_get_essid(): error setting ESSID for device %s. errno = %d", nm_device_get_iface (dev), errno); close (iwlib_socket); } return (dev->options.wireless.cur_essid); } /* * nm_device_set_essid * * If a device is wireless, set the essid that it should use. */ void nm_device_set_essid (NMDevice *dev, const char *essid) { int iwlib_socket; int err; struct iwreq wreq; unsigned char safe_essid[IW_ESSID_MAX_SIZE + 1] = "\0"; g_return_if_fail (dev != NULL); g_return_if_fail (nm_device_is_wireless (dev)); /* Test devices directly set cur_essid */ if (dev->test_device) { if (dev->options.wireless.cur_essid) g_free (dev->options.wireless.cur_essid); dev->options.wireless.cur_essid = g_strdup (essid); return; } /* Make sure the essid we get passed is a valid size */ if (!essid) safe_essid[0] = '\0'; else { strncpy (safe_essid, essid, IW_ESSID_MAX_SIZE); safe_essid[IW_ESSID_MAX_SIZE] = '\0'; } iwlib_socket = iw_sockets_open (); if (iwlib_socket >= 0) { wreq.u.essid.pointer = (caddr_t) safe_essid; wreq.u.essid.length = strlen (safe_essid) + 1; wreq.u.essid.flags = 1; /* Enable essid on card */ err = iw_set_ext (iwlib_socket, nm_device_get_iface (dev), SIOCSIWESSID, &wreq); if (err == -1) syslog (LOG_ERR, "nm_device_set_essid(): error setting ESSID for device %s. errno = %d", nm_device_get_iface (dev), errno); close (iwlib_socket); } } /* * nm_device_get_ap_address * * If a device is wireless, get the access point's ethernet address * that the card is associated with. */ void nm_device_get_ap_address (NMDevice *dev, struct ether_addr *addr) { int iwlib_socket; struct iwreq wrq; g_return_if_fail (dev != NULL); g_return_if_fail (addr != NULL); g_return_if_fail (nm_device_is_wireless (dev)); /* Test devices return an invalid address when there's no link, * and a made-up address when there is a link. */ if (dev->test_device) { struct ether_addr good_addr = { {0x70, 0x37, 0x03, 0x70, 0x37, 0x03} }; struct ether_addr bad_addr = { {0x00, 0x00, 0x00, 0x00, 0x00, 0x00} }; gboolean link = nm_device_get_link_active (dev); memcpy ((link ? &good_addr : &bad_addr), &(wrq.u.ap_addr.sa_data), sizeof (struct ether_addr)); return; } iwlib_socket = iw_sockets_open (); if (iw_get_ext (iwlib_socket, nm_device_get_iface (dev), SIOCGIWAP, &wrq) >= 0) memcpy (addr, &(wrq.u.ap_addr.sa_data), sizeof (struct ether_addr)); else memset (addr, 0, sizeof (struct ether_addr)); close (iwlib_socket); } /* * nm_device_set_enc_key * * If a device is wireless, set the encryption key that it should use. * * key: encryption key to use, or NULL or "" to disable encryption. * NOTE that at this time, the key must be the raw HEX key, not * a passphrase. */ void nm_device_set_enc_key (NMDevice *dev, const char *key) { int iwlib_socket; int err; struct iwreq wreq; int keylen; unsigned char safe_key[IW_ENCODING_TOKEN_MAX + 1]; gboolean set_key = FALSE; g_return_if_fail (dev != NULL); g_return_if_fail (nm_device_is_wireless (dev)); /* Test devices just ignore encryption keys */ if (dev->test_device) return; /* Make sure the essid we get passed is a valid size */ if (!key) safe_key[0] = '\0'; else { strncpy (safe_key, key, IW_ENCODING_TOKEN_MAX); safe_key[IW_ENCODING_TOKEN_MAX] = '\0'; } iwlib_socket = iw_sockets_open (); if (iwlib_socket >= 0) { wreq.u.data.pointer = (caddr_t) NULL; wreq.u.data.length = 0; wreq.u.data.flags = IW_ENCODE_ENABLED; /* Unfortunately, some drivers (Cisco) don't make a distinction between * Open System authentication mode and whether or not to use WEP. You * DON'T have to use WEP when using Open System, but these cards force * it. Therefore, we have to set Open System mode when using WEP. */ if (strlen (safe_key) == 0) { wreq.u.data.flags |= IW_ENCODE_DISABLED | IW_ENCODE_NOKEY; set_key = TRUE; } else { unsigned char parsed_key[IW_ENCODING_TOKEN_MAX + 1]; keylen = iw_in_key_full(iwlib_socket, nm_device_get_iface (dev), safe_key, &parsed_key[0], &wreq.u.data.flags); if (keylen > 0) { wreq.u.data.flags |= IW_ENCODE_RESTRICTED; // FIXME: what about restricted/Shared Key? wreq.u.data.pointer = (caddr_t) &parsed_key; wreq.u.data.length = keylen; set_key = TRUE; } } if (set_key) { err = iw_set_ext (iwlib_socket, nm_device_get_iface (dev), SIOCSIWENCODE, &wreq); if (err == -1) syslog (LOG_ERR, "nm_device_set_enc_key(): error setting key for device %s. errno = %d", nm_device_get_iface (dev), errno); } close (iwlib_socket); } else syslog (LOG_ERR, "nm_device_set_enc_key(): could not get wireless control socket."); } /* * nm_device_get_signal_strength * * Get the current signal strength of a wireless device. This only works when * the card is associated with an access point, so will only work for the * active device. * * Returns: -1 on error * 0 - 100 strength percentage of the connection to the current access point * */ gint8 nm_device_get_signal_strength (NMDevice *dev) { g_return_val_if_fail (dev != NULL, -1); g_return_val_if_fail (nm_device_is_wireless (dev), -1); return (dev->options.wireless.strength); } /* * nm_device_update_signal_strength * * Update the device's idea of the strength of its connection to the * current access point. * */ void nm_device_update_signal_strength (NMDevice *dev) { gboolean has_range; int iwlib_socket; iwrange range; iwstats stats; int percent = -1; g_return_if_fail (dev != NULL); g_return_if_fail (nm_device_is_wireless (dev)); g_return_if_fail (dev->app_data != NULL); /* If we aren't the active device, we don't really have a signal strength * that would mean anything. */ #if 0 if (dev != dev->app_data->active_device) { dev->options.wireless.strength = -1; return; } #endif /* Fake a value for test devices */ if (dev->test_device) { dev->options.wireless.strength = 75; return; } iwlib_socket = iw_sockets_open (); has_range = (iw_get_range_info (iwlib_socket, nm_device_get_iface (dev), &range) >= 0); if (iw_get_stats (iwlib_socket, nm_device_get_iface (dev), &stats, &range, has_range) == 0) { /* Update our max quality while we're at it */ dev->options.wireless.max_quality = range.max_qual.level; dev->options.wireless.noise = stats.qual.noise; percent = nm_wireless_qual_to_percent (dev, &(stats.qual)); } else { dev->options.wireless.max_quality = -1; dev->options.wireless.noise = -1; percent = -1; } close (iwlib_socket); dev->options.wireless.strength = percent; } /* * nm_device_get_noise * * Get the current noise level of a wireless device. * */ guint8 nm_device_get_noise (NMDevice *dev) { g_return_val_if_fail (dev != NULL, 0); g_return_val_if_fail (nm_device_is_wireless (dev), 0); return (dev->options.wireless.noise); } /* * nm_device_get_max_quality * * Get the quality maximum of a wireless device. * */ guint8 nm_device_get_max_quality (NMDevice *dev) { g_return_val_if_fail (dev != NULL, 0); g_return_val_if_fail (nm_device_is_wireless (dev), 0); return (dev->options.wireless.max_quality); } /* * nm_device_get_bad_crypt_packets * * Return the number of packets the card has dropped because * they could not be successfully decrypted. * */ guint32 nm_device_get_bad_crypt_packets (NMDevice *dev) { iwstats stats; int sk; int err; g_return_val_if_fail (dev != NULL, 0); g_return_val_if_fail (nm_device_is_wireless (dev), 0); sk = iw_sockets_open (); err = iw_get_stats (sk, nm_device_get_iface (dev), &stats, NULL, FALSE); close (sk); return (err == 0 ? stats.discard.code : 0); } /* * nm_device_get_ip4_address * * Get a device's IPv4 address * */ guint32 nm_device_get_ip4_address(NMDevice *dev) { g_return_val_if_fail (dev != NULL, 0); return (dev->ip4_address); } void nm_device_update_ip4_address (NMDevice *dev) { guint32 new_address; struct ifreq req; int socket; int err; g_return_if_fail (dev != NULL); g_return_if_fail (dev->app_data != NULL); g_return_if_fail (nm_device_get_iface (dev) != NULL); /* Test devices get a nice, bogus IP address */ if (dev->test_device) { dev->ip4_address = 0x07030703; return; } socket = nm_get_network_control_socket (); if (socket < 0) return; strncpy ((char *)(&req.ifr_name), nm_device_get_iface (dev), 16); // 16 == IF_NAMESIZE err = ioctl (socket, SIOCGIFADDR, &req); close (socket); if (err != 0) return; new_address = ((struct sockaddr_in *)(&req.ifr_addr))->sin_addr.s_addr; /* If the new address is different, send an IP4AddressChanged signal on the bus */ if (new_address != nm_device_get_ip4_address (dev)) { nm_dbus_signal_device_ip4_address_change (dev->app_data->dbus_connection, dev); dev->ip4_address = new_address; } } /* * nm_device_get_ip6_address * * Get a device's IPv6 address * */ void nm_device_get_ip6_address(NMDevice *dev) { /* FIXME * Implement */ } /* * nm_device_set_up_down * * Set the up flag on the device on or off * */ static void nm_device_set_up_down (NMDevice *dev, gboolean up) { struct ifreq ifr; int iface_fd; int err; guint32 flags = up ? IFF_UP : ~IFF_UP; g_return_if_fail (dev != NULL); /* Test devices do whatever we tell them to do */ if (dev->test_device) { dev->test_device_up = up; return; } iface_fd = nm_get_network_control_socket (); if (iface_fd < 0) return; /* Get flags already there */ strcpy (ifr.ifr_name, nm_device_get_iface (dev)); err = ioctl (iface_fd, SIOCGIFFLAGS, &ifr); if (!err) { /* If the interface doesn't have those flags already, * set them on it. */ if ((ifr.ifr_flags^flags) & IFF_UP) { ifr.ifr_flags &= ~IFF_UP; ifr.ifr_flags |= IFF_UP & flags; err = ioctl (iface_fd, SIOCSIFFLAGS, &ifr); if (err) syslog (LOG_ERR, "nm_device_set_up_down() could not bring device %s %s. errno = %d", nm_device_get_iface (dev), (up ? "up" : "down"), errno ); } } else syslog (LOG_ERR, "nm_device_set_up_down() could not get flags for device %s. errno = %d", nm_device_get_iface (dev), errno ); close (iface_fd); } /* * Interface state functions: bring up, down, check * */ void nm_device_bring_up (NMDevice *dev) { g_return_if_fail (dev != NULL); nm_device_set_up_down (dev, TRUE); } void nm_device_bring_down (NMDevice *dev) { g_return_if_fail (dev != NULL); nm_device_set_up_down (dev, FALSE); } gboolean nm_device_is_up (NMDevice *dev) { int iface_fd; struct ifreq ifr; int err; g_return_val_if_fail (dev != NULL, FALSE); if (dev->test_device) return (dev->test_device_up); iface_fd = nm_get_network_control_socket (); if (iface_fd < 0) return (FALSE); /* Get device's flags */ strcpy (ifr.ifr_name, nm_device_get_iface (dev)); err = ioctl (iface_fd, SIOCGIFFLAGS, &ifr); close (iface_fd); if (!err) return (!((ifr.ifr_flags^IFF_UP) & IFF_UP)); syslog (LOG_ERR, "nm_device_is_up() could not get flags for device %s. errno = %d", nm_device_get_iface (dev), errno ); return (FALSE); } /* * nm_device_set_mode_managed * * Set managed/infrastructure mode on a device (currently wireless only) * */ void nm_device_set_mode_managed (NMDevice *dev) { int sk; struct iwreq wreq; g_return_if_fail (dev != NULL); g_return_if_fail (nm_device_is_wireless (dev)); /* Force the card into Managed/Infrastructure mode */ sk = iw_sockets_open (); if (sk >= 0) { int err; wreq.u.mode = IW_MODE_INFRA; err = iw_set_ext (sk, nm_device_get_iface (dev), SIOCSIWMODE, &wreq); if (err == -1) syslog (LOG_ERR, "nm_device_set_mode_managed (%s): error setting card to Infrastructure mode. errno = %d", nm_device_get_iface (dev), errno); close (sk); } } /* * nm_device_set_mode_adhoc * * Set Ad Hoc mode on a device (currently wireless only) * */ void nm_device_set_mode_adhoc (NMDevice *dev) { int sk; struct iwreq wreq; g_return_if_fail (dev != NULL); g_return_if_fail (nm_device_is_wireless (dev)); /* Force the card into Adhoc mode */ sk = iw_sockets_open (); if (sk >= 0) { int err; wreq.u.mode = IW_MODE_ADHOC; err = iw_set_ext (sk, nm_device_get_iface (dev), SIOCSIWMODE, &wreq); if (err == -1) syslog (LOG_ERR, "nm_device_set_mode_adhoc (%s): error setting card to Ad Hoc mode. errno = %d", nm_device_get_iface (dev), errno); close (sk); } } /* * nm_device_activation_begin * * Spawn a new thread to handle device activation. * * Returns: TRUE on success activation beginning * FALSE on error beginning activation (bad params, couldn't create thread) * */ gboolean nm_device_activation_begin (NMDevice *dev) { GError *error = NULL; NMData *data = (NMData *)dev->app_data; g_return_val_if_fail (dev != NULL, FALSE); g_return_val_if_fail (!dev->activating, TRUE); // Return if activation has already begun g_return_val_if_fail (data != NULL, FALSE); /* Ref the device so it doesn't go away while worker function is active */ nm_device_ref (dev); /* Don't attempt to actually activate if we are just starting NetworkManager and * we are about to activate a wired device that's already configured. Plays nicer * with the system when NM is started after a network is already set up. * * FIXME: IPv6 here too, and this really should not be here, it should be part of * the policy, not the device code itself. */ if (data->starting_up && nm_device_is_wired (data->active_device) && nm_device_get_ip4_address (data->active_device)) { dev->activating = FALSE; dev->just_activated = TRUE; return (TRUE); } /* Reset communication flags between worker and main thread */ dev->activating = TRUE; dev->just_activated = FALSE; dev->quit_activation = FALSE; if (nm_device_is_wireless (dev)) { dev->options.wireless.now_scanning = FALSE; dev->options.wireless.user_key_received = FALSE; } if (!g_thread_create (nm_device_activation_worker, dev, FALSE, &error)) { syslog (LOG_CRIT, "nm_device_activation_begin(): could not create activation worker thread."); dev->activating = FALSE; return (FALSE); } nm_dbus_signal_device_status_change (data->dbus_connection, dev, DEVICE_ACTIVATING); return (TRUE); } /* * nm_device_activation_should_cancel * * Check whether we should stop activation, and if so clean up flags * and other random things. * */ static gboolean nm_device_activation_should_cancel (NMDevice *dev) { g_return_val_if_fail (dev != NULL, TRUE); /* If we were told to quit activation, stop the thread and return */ if (dev->quit_activation) { syslog (LOG_DEBUG, "nm_device_activation_worker(%s): activation canceled.", nm_device_get_iface (dev)); dev->activating = FALSE; dev->just_activated = FALSE; return (TRUE); } return (FALSE); } /* * nm_device_activate_wireless * * Bring up a wireless card with the essid and wep key of its "best" ap * * Returns: TRUE on successful activation * FALSE on unsuccessful activation (ie no best AP) * */ static gboolean nm_device_activate_wireless (NMDevice *dev, guint *bad_crypt_packets) { NMAccessPoint *best_ap; gboolean success = FALSE; g_return_val_if_fail (dev != NULL, FALSE); g_return_val_if_fail (nm_device_is_wireless (dev), FALSE); *bad_crypt_packets = 0; /* If there is a desired AP to connect to, use that essid and possible WEP key */ if ((best_ap = nm_device_get_best_ap (dev)) && nm_ap_get_essid (best_ap)) { nm_device_bring_down (dev); /* Force the card into Managed/Infrastructure mode */ nm_device_set_mode_managed (dev); /* Disable encryption, then re-enable and set correct key on the card * if we are going to encrypt traffic. */ nm_device_set_enc_key (dev, NULL); if (nm_ap_get_encrypted (best_ap) && nm_ap_get_enc_key_source (best_ap)) { char *hashed_key = nm_ap_get_enc_key_hashed (best_ap); nm_device_set_enc_key (dev, hashed_key); g_free (hashed_key); } nm_device_set_essid (dev, nm_ap_get_essid (best_ap)); *bad_crypt_packets = nm_device_get_bad_crypt_packets (dev); syslog (LOG_INFO, "nm_device_wireless_activate(%s) using essid '%s'", nm_device_get_iface (dev), nm_ap_get_essid (best_ap)); /* Bring the device up and pause to allow card to associate */ nm_device_bring_up (dev); g_usleep (G_USEC_PER_SEC * 2); nm_device_update_link_active (dev, FALSE); success = TRUE; } return (success); } inline gboolean HAVE_LINK (NMDevice *dev, guint32 bad_crypt_packets) { g_return_val_if_fail (dev != NULL, FALSE); g_return_val_if_fail (nm_device_is_wireless (dev), FALSE); syslog (LOG_NOTICE, "HAVELINK: act=%d && (dev_crypt=%d <= prev_crypt=%d)\n", nm_device_get_link_active (dev), nm_device_get_bad_crypt_packets (dev), bad_crypt_packets); return (nm_device_get_link_active (dev) && (nm_device_get_bad_crypt_packets (dev) <= bad_crypt_packets)); } /* * nm_device_activate_wireless_wait_for_link * * Spin until we have a wireless link, which may mean * requesting a key from the user and trying various hashed * iterations of that key. * */ void nm_device_activate_wireless_wait_for_link (NMDevice *dev) { NMAccessPoint *best_ap; guint32 bad_crypt_packets = 0; g_return_if_fail (dev != NULL); /* If the card is just inserted, we may not have had a chance to scan yet */ if (!(best_ap = nm_device_get_best_ap (dev))) { nm_device_do_wireless_scan (dev); nm_device_update_best_ap (dev); best_ap = nm_device_get_best_ap (dev); } /* Try activating the device with the key and access point we have already */ nm_device_activate_wireless (dev, &bad_crypt_packets); /* Wait until we have a link. Some things that might block us from * getting one: * 1) Access point we want to associate with has encryption enabled and * we don't have the right encryption key. If we have a key of some * sort, try various passhprase->key hashes of it. If we don't have * a key, ask the user for one and wait until we are canceled (wireless * card was ejected or the user plugged the computer into a wired network) * or until we get a key back. * 2) We don't have any access points we wish to associate with yet. In that case * wait for the wireless scan to complete in the other thread and to pick * a "best" access point for us. * */ /* There are two ways to check for a good link. If we are using WEP and Open System * authentication, then we can associate with the base station regardless of whether the * WEP key is right or not. Therefore, we have to monitor the # of packets the card discards * when its unable to decrypt them, since that gives us some indicator of whether the WEP * key is wrong. It seems that right after association, at least one packet is dropped by * most cards if the WEP key is wrong. * * The second and better way (if all cards actually supported it) is to check the MAC address * the card is associated with. However, this doesn't tell us if the WEP key is wrong when we * are using Open System authentication. Also, not all drivers return an invalid MAC address * when the card cannot communicate with the access point. */ /* For the link check, ensure that: * 1) a classic link check is good, ie does the card report a valid associated AP MAC address and is it * receiving WEP-enabled packets OK if WEP is on * 2) we have a best access point, and if that AP is encrypted, that we have a valid encryption key for it * * If either of these things fail, we try other access points or we try to retrieve another encrpytion key * from the user. * */ while ( !HAVE_LINK (dev, bad_crypt_packets) || (best_ap && (nm_ap_get_encrypted (best_ap) && (!nm_ap_get_enc_key_source (best_ap) || !strlen (nm_ap_get_enc_key_source (best_ap)))))) { syslog (LOG_NOTICE, "LINK: !HAVE=%d, (best_ap=0x%X && (is_enc=%d && (!source=%d || !len_source=%d)))\n", !HAVE_LINK (dev, bad_crypt_packets), best_ap, nm_ap_get_encrypted (best_ap), !nm_ap_get_enc_key_source (best_ap), nm_ap_get_enc_key_source (best_ap) ? !strlen (nm_ap_get_enc_key_source (best_ap)) : 0); if ((best_ap = nm_device_get_best_ap (dev))) { dev->options.wireless.now_scanning = FALSE; /* If we don't have a link yet, the encryption key is bad. Ask the user for a * new one. */ if (nm_ap_get_encrypted (best_ap)) { dev->options.wireless.user_key_received = FALSE; nm_dbus_get_user_key_for_network (dev->app_data->dbus_connection, dev, best_ap); /* Wait for the key to come back */ syslog (LOG_DEBUG, "nm_device_activation_worker(%s): asking for user key.", nm_device_get_iface (dev)); while (!dev->options.wireless.user_key_received && !dev->quit_activation) g_usleep (G_USEC_PER_SEC / 2); syslog (LOG_DEBUG, "nm_device_activation_worker(%s): user key received.", nm_device_get_iface (dev)); /* If we were told to quit activation, stop the thread and return */ if (nm_device_activation_should_cancel (dev)) return; } /* Try activating again with up-to-date access point and keys */ nm_device_activate_wireless (dev, &bad_crypt_packets); } else { dev->options.wireless.now_scanning = TRUE; syslog (LOG_DEBUG, "nm_device_activation_worker(%s): waiting for an access point.", nm_device_get_iface (dev)); g_usleep (G_USEC_PER_SEC * 2); } /* If we were told to quit activation, stop the thread and return */ if (nm_device_activation_should_cancel (dev)) break; } dev->options.wireless.now_scanning = FALSE; } /* * nm_device_activation_configure_ip * * Perform any IP-based configuration on a device, like running DHCP * or manually setting up the IP address, gateway, and default route. * */ static gboolean nm_device_activation_configure_ip (NMDevice *dev) { gboolean success = FALSE; g_return_val_if_fail (dev != NULL, FALSE); if (nm_device_config_get_use_dhcp (dev)) { if (nm_system_device_run_dhcp (dev)) success = TRUE; else { /* Interfaces cannot be down if they are the active interface, * otherwise we cannot use them for scanning or link detection. * If dhclient doesn't get a DHCP address, it will take the interface * down, so we reactivate it here. */ if (nm_device_is_wireless (dev)) { nm_device_set_essid (dev, ""); nm_device_set_enc_key (dev, NULL); } nm_device_bring_up (dev); } } else { /* Manually set up the device */ success = nm_system_device_setup_static_ip4_config (dev); } return (success); } /* * nm_device_activation_worker * * Thread worker function to actually activate a device. We have to do it in another * thread because things like dhclient block our main thread's event loop, and thus we * wouldn't respond to dbus messages. */ static gpointer nm_device_activation_worker (gpointer user_data) { NMDevice *dev = (NMDevice *)user_data; unsigned char hostname[100] = "\0"; int host_err; g_return_val_if_fail (dev != NULL, NULL); g_return_val_if_fail (dev->app_data != NULL, NULL); syslog (LOG_DEBUG, "nm_device_activation_worker (%s) started...", nm_device_get_iface (dev)); /* If its a wireless device, set the ESSID and WEP key */ if (nm_device_is_wireless (dev)) { nm_device_activate_wireless_wait_for_link (dev); /* If we were told to quit activation, stop the thread and return */ if (nm_device_activation_should_cancel (dev)) { nm_device_unref (dev); return (NULL); } syslog (LOG_DEBUG, "nm_device_activation_worker(%s): using ESSID '%s'", nm_device_get_iface (dev), nm_ap_get_essid (nm_device_get_best_ap (dev))); } else { /* Bring the device up */ if (!nm_device_is_up (dev)); nm_device_bring_up (dev); } nm_system_delete_default_route (); nm_system_device_stop_dhcp (dev); /* If we don't have a "best" ap, don't try to get a DHCP address or restart the name service cache */ if (nm_device_is_wired (dev) || (nm_device_is_wireless (dev) && nm_device_get_best_ap (dev))) { gboolean success; /* Save machine host name */ host_err = gethostname (&hostname[0], 100); if (!(success = nm_device_activation_configure_ip (dev))) syslog (LOG_DEBUG, "nm_device_activation_worker(%s): could not retrieve and assign IP information to device\n", nm_device_get_iface (dev)); /* Set the hostname back to what it was before so that X11 doesn't * puke when the hostname changes, and so users can actually launch stuff. */ if (host_err >= 0) sethostname (hostname, strlen (hostname)); /* If we were told to quit activation, stop the thread and return */ if (nm_device_activation_should_cancel (dev) || !success) { nm_device_unref (dev); return (NULL); } /* Make system aware of any new DNS settings from resolv.conf */ nm_system_update_dns (); } /* If we were told to quit activation, stop the thread and return */ if (nm_device_activation_should_cancel (dev)) { nm_device_unref (dev); return (NULL); } dev->just_activated = TRUE; syslog (LOG_DEBUG, "nm_device_activation_worker(%s): device activated", nm_device_get_iface (dev)); nm_device_update_ip4_address (dev); dev->activating = FALSE; nm_device_unref (dev); return (NULL); } /* * nm_device_is_just_activated * * Check if the device was just activated successfully or not. If so, clear * its just_activated flag and return TRUE. If its not activated yet, return FALSE. * */ gboolean nm_device_is_just_activated (NMDevice *dev) { g_return_val_if_fail (dev != NULL, FALSE); if (dev->just_activated) { dev->just_activated = FALSE; return (TRUE); } return (FALSE); } /* * nm_device_is_activating * * Return whether or not the device is currently activating itself. * */ gboolean nm_device_is_activating (NMDevice *dev) { g_return_val_if_fail (dev != NULL, FALSE); return (dev->activating); } /* * nm_device_activation_cancel * * Signal activation worker that it should stop and die. * */ void nm_device_activation_cancel (NMDevice *dev) { g_return_if_fail (dev != NULL); if (nm_device_is_activating (dev)) { syslog (LOG_DEBUG, "nm_device_activation_cancel(%s): cancelling...", nm_device_get_iface (dev)); dev->quit_activation = TRUE; nm_system_kill_all_dhcp_daemons (); /* dhcp daemons will block, so have to kill them to return control */ /* Spin until cancelled. Possible race conditions or deadlocks here. * The other problem with waiting here is that we hold up dbus traffic * that we should respond to. */ while (nm_device_is_activating (dev)) g_usleep (G_USEC_PER_SEC / 2); } } /* * nm_device_deactivate * * Remove a device's routing table entries and IP address. * */ gboolean nm_device_deactivate (NMDevice *dev, gboolean just_added) { g_return_val_if_fail (dev != NULL, FALSE); g_return_val_if_fail (dev->app_data != NULL, FALSE); nm_device_activation_cancel (dev); /* Take out any entries in the routing table and any IP address the old device had. */ nm_system_device_flush_routes (dev); nm_system_device_flush_addresses (dev); dev->ip4_address = 0; if (!just_added) nm_dbus_signal_device_status_change (dev->app_data->dbus_connection, dev, DEVICE_NO_LONGER_ACTIVE); /* Clean up stuff, don't leave the card associated */ if (nm_device_is_wireless (dev)) { nm_device_set_essid (dev, ""); nm_device_set_enc_key (dev, NULL); } return (TRUE); } /* * nm_device_is_scanning * * Returns whether the device is scanning, awaiting an access point to connect to. * Note that this does NOT get set when the device is actually scanning, just * when it is waiting for a valid access point to connect to. * */ gboolean nm_device_is_scanning (NMDevice *dev) { g_return_val_if_fail (dev != NULL, FALSE); g_return_val_if_fail (nm_device_is_wireless (dev), FALSE); return (dev->options.wireless.now_scanning); } /* * nm_device_set_user_key_for_network * * Called upon receipt of a NetworkManagerInfo reply with a * user-supplied key. * */ void nm_device_set_user_key_for_network (NMDevice *dev, NMAccessPointList *invalid_list, unsigned char *network, unsigned char *key, NMAPEncMethod enc_method) { NMAccessPoint *best_ap; const char *cancel_message = "***canceled***"; g_return_if_fail (dev != NULL); g_return_if_fail (nm_device_is_wireless (dev)); g_return_if_fail (network != NULL); g_return_if_fail (key != NULL); /* If the user canceled, mark the ap as invalid */ if (strncmp (key, cancel_message, strlen (cancel_message)) == 0) { NMAccessPoint *ap; if ((ap = nm_device_ap_list_get_ap_by_essid (dev, network))) { NMAccessPoint *invalid_ap = nm_ap_new_from_ap (ap); if (invalid_list) nm_ap_list_append_ap (invalid_list, invalid_ap); } nm_device_update_best_ap (dev); } else if ((best_ap = nm_device_get_best_ap (dev))) { /* Make sure the "best" ap matches the essid we asked for the key of, * then set the new key on the access point. */ if (nm_null_safe_strcmp (network, nm_ap_get_essid (best_ap)) == 0) nm_ap_set_enc_key_source (best_ap, key, enc_method); } dev->options.wireless.user_key_received = TRUE; } /* * nm_device_ap_list_add_ap * * Add an access point to the devices internal AP list. * */ static void nm_device_ap_list_add_ap (NMDevice *dev, NMAccessPoint *ap) { g_return_if_fail (dev != NULL); g_return_if_fail (ap != NULL); g_return_if_fail (nm_device_is_wireless (dev)); nm_ap_list_append_ap (dev->options.wireless.ap_list, ap); /* Transfer ownership of ap to the list by unrefing it here */ nm_ap_unref (ap); } /* * nm_device_ap_list_clear * * Clears out the device's internal list of available access points. * */ void nm_device_ap_list_clear (NMDevice *dev) { g_return_if_fail (dev != NULL); g_return_if_fail (nm_device_is_wireless (dev)); if (!dev->options.wireless.ap_list) return; nm_ap_list_unref (dev->options.wireless.ap_list); dev->options.wireless.ap_list = NULL; } /* * nm_device_ap_list_get_ap_by_essid * * Get the access point for a specific essid * */ NMAccessPoint *nm_device_ap_list_get_ap_by_essid (NMDevice *dev, const char *essid) { NMAccessPoint *ret_ap = NULL; g_return_val_if_fail (dev != NULL, NULL); g_return_val_if_fail (nm_device_is_wireless (dev), NULL); g_return_val_if_fail (essid != NULL, NULL); if (!dev->options.wireless.ap_list) return (NULL); ret_ap = nm_ap_list_get_ap_by_essid (dev->options.wireless.ap_list, essid); return (ret_ap); } /* * nm_device_ap_list_get_ap_by_address * * Get the access point for a specific MAC address * */ NMAccessPoint *nm_device_ap_list_get_ap_by_address (NMDevice *dev, const struct ether_addr *addr) { NMAccessPoint *ret_ap = NULL; g_return_val_if_fail (dev != NULL, NULL); g_return_val_if_fail (nm_device_is_wireless (dev), NULL); g_return_val_if_fail (addr != NULL, NULL); if (!dev->options.wireless.ap_list) return (NULL); ret_ap = nm_ap_list_get_ap_by_address (dev->options.wireless.ap_list, addr); return (ret_ap); } /* * nm_device_ap_list_get * * Return a pointer to the AP list * */ NMAccessPointList *nm_device_ap_list_get (NMDevice *dev) { g_return_val_if_fail (dev != NULL, NULL); g_return_val_if_fail (nm_device_is_wireless (dev), NULL); return (dev->options.wireless.ap_list); } /* * Get/Set functions for "best" access point * */ NMAccessPoint *nm_device_get_best_ap (NMDevice *dev) { NMAccessPoint *best_ap; g_return_val_if_fail (dev != NULL, NULL); g_return_val_if_fail (nm_device_is_wireless (dev), NULL); g_mutex_lock (dev->options.wireless.best_ap_mutex); best_ap = dev->options.wireless.best_ap; g_mutex_unlock (dev->options.wireless.best_ap_mutex); return (best_ap); } void nm_device_set_best_ap (NMDevice *dev, NMAccessPoint *ap) { g_return_if_fail (dev != NULL); g_return_if_fail (nm_device_is_wireless (dev)); g_mutex_lock (dev->options.wireless.best_ap_mutex); if (dev->options.wireless.best_ap) nm_ap_unref (dev->options.wireless.best_ap); if (ap) nm_ap_ref (ap); dev->options.wireless.best_ap = ap; nm_device_unfreeze_best_ap (dev); g_mutex_unlock (dev->options.wireless.best_ap_mutex); } /* * Freeze/unfreeze best ap * * If the user explicitly picks a network to associate with, we don't * change the active network until it goes out of range. * */ void nm_device_freeze_best_ap (NMDevice *dev) { g_return_if_fail (dev != NULL); g_return_if_fail (nm_device_is_wireless (dev)); dev->options.wireless.freeze_best_ap = TRUE; } void nm_device_unfreeze_best_ap (NMDevice *dev) { g_return_if_fail (dev != NULL); g_return_if_fail (nm_device_is_wireless (dev)); dev->options.wireless.freeze_best_ap = FALSE; } gboolean nm_device_is_best_ap_frozen (NMDevice *dev) { g_return_val_if_fail (dev != NULL, FALSE); g_return_val_if_fail (nm_device_is_wireless (dev), FALSE); return (dev->options.wireless.freeze_best_ap); } /* * nm_device_get_path_for_ap * * Return the object path for an access point. * * NOTE: assumes the access point is actually in the device's access point list. * */ char * nm_device_get_path_for_ap (NMDevice *dev, NMAccessPoint *ap) { g_return_val_if_fail (dev != NULL, NULL); g_return_val_if_fail (ap != NULL, NULL); if (nm_ap_get_essid (ap)) return (g_strdup_printf ("%s/%s/Networks/%s", NM_DBUS_PATH_DEVICES, nm_device_get_iface (dev), nm_ap_get_essid (ap))); else return (NULL); } /* * nm_device_need_ap_switch * * Returns TRUE if the essid of the card does not match the essid * of the "best" access point it should be associating with. * */ gboolean nm_device_need_ap_switch (NMDevice *dev) { NMAccessPoint *ap; gboolean need_switch = FALSE; g_return_val_if_fail (dev != NULL, FALSE); g_return_val_if_fail (nm_device_is_wireless (dev), FALSE); ap = nm_device_get_best_ap (dev); if (nm_null_safe_strcmp (nm_device_get_essid (dev), (ap ? nm_ap_get_essid (ap) : NULL)) != 0) need_switch = TRUE; return (need_switch); } /* * nm_device_update_best_ap * * Recalculate the "best" access point we should be associating with. This * function may disrupt the current connection, so it should be called only * when necessary, ie when the current access point is no longer in range * or is for some other reason invalid and should no longer be used. * */ void nm_device_update_best_ap (NMDevice *dev) { NMAccessPointList *ap_list; NMAPListIter *iter; NMAccessPoint *ap = NULL; NMAccessPoint *best_ap = NULL; NMAccessPoint *trusted_best_ap = NULL; NMAccessPoint *untrusted_best_ap = NULL; GTimeVal trusted_latest_timestamp = {0, 0}; GTimeVal untrusted_latest_timestamp = {0, 0}; g_return_if_fail (dev != NULL); g_return_if_fail (dev->app_data != NULL); g_return_if_fail (nm_device_is_wireless (dev)); if (!(ap_list = nm_device_ap_list_get (dev))) return; /* Iterate over the device's ap list to make sure the current * "best" ap is still in the device's ap list (so that if its * not, we can "unfreeze" the best ap if its been frozen already). * If it is, we don't change the best ap here. */ if (nm_device_is_best_ap_frozen (dev)) { NMAccessPoint *best_ap = nm_device_get_best_ap (dev); /* If its in the device's ap list still, don't change the * best ap, since its frozen. */ g_mutex_lock (dev->options.wireless.best_ap_mutex); if ( best_ap && !nm_ap_list_get_ap_by_essid (dev->app_data->invalid_ap_list, nm_ap_get_essid (best_ap)) && nm_device_ap_list_get_ap_by_essid (dev, nm_ap_get_essid (best_ap))) { g_mutex_unlock (dev->options.wireless.best_ap_mutex); return; } /* Otherwise, its gone away and we don't care about it anymore */ nm_device_unfreeze_best_ap (dev); g_mutex_unlock (dev->options.wireless.best_ap_mutex); } if (!(iter = nm_ap_list_iter_new (ap_list))) return; while ((ap = nm_ap_list_iter_next (iter))) { NMAccessPoint *tmp_ap; char *ap_essid = nm_ap_get_essid (ap); /* Access points in the "invalid" list cannot be used */ if (nm_ap_list_get_ap_by_essid (dev->app_data->invalid_ap_list, ap_essid)) continue; if ((tmp_ap = nm_ap_list_get_ap_by_essid (dev->app_data->allowed_ap_list, ap_essid))) { const GTimeVal *curtime = nm_ap_get_timestamp (tmp_ap); if (nm_ap_get_trusted (tmp_ap) && (curtime->tv_sec > trusted_latest_timestamp.tv_sec)) { trusted_latest_timestamp = *nm_ap_get_timestamp (tmp_ap); trusted_best_ap = ap; /* Merge access point data (mainly to get updated WEP key) */ nm_ap_set_enc_key_source (trusted_best_ap, nm_ap_get_enc_key_source (tmp_ap), nm_ap_get_enc_method (tmp_ap)); } else if (!nm_ap_get_trusted (tmp_ap) && (curtime->tv_sec > untrusted_latest_timestamp.tv_sec)) { untrusted_latest_timestamp = *nm_ap_get_timestamp (tmp_ap); untrusted_best_ap = ap; /* Merge access point data (mainly to get updated WEP key) */ nm_ap_set_enc_key_source (untrusted_best_ap, nm_ap_get_enc_key_source (tmp_ap), nm_ap_get_enc_method (tmp_ap)); } } } best_ap = trusted_best_ap ? trusted_best_ap : untrusted_best_ap; nm_ap_list_iter_free (iter); /* If the best ap is NULL, bring device down and clear out its essid and AP */ nm_device_set_best_ap (dev, best_ap); if (!nm_device_get_best_ap (dev)) { nm_device_bring_down (dev); nm_device_set_essid (dev, ""); nm_device_set_enc_key (dev, NULL); nm_device_bring_up (dev); } } /* * nm_device_wireless_network_exists * * Tell the card to explicitly use with a particular essid, and then * see if we can associate with some AP using that ESSID. * Mainly for non-essid-broadcasting APs to figure out whether or not * some random ESSID the user gave us exists or not. * * WARNING: will blow away any connection the card currently has. * */ gboolean nm_device_wireless_network_exists (NMDevice *dev, const char *network, struct ether_addr *ap_addr) { struct ether_addr addr; g_return_val_if_fail (dev != NULL, FALSE); g_return_val_if_fail (network != NULL, FALSE); g_return_val_if_fail (ap_addr != NULL, FALSE); g_return_val_if_fail (strlen (network), FALSE); fprintf (stderr, "nm_device_wireless_network_exists () looking for network '%s'...", network); nm_device_bring_down (dev); /* Force the card into Managed/Infrastructure mode */ nm_device_set_mode_managed (dev); nm_device_set_enc_key (dev, NULL); nm_device_set_essid (dev, network); /* Bring the device up and pause to allow card to associate */ nm_device_bring_up (dev); g_usleep (G_USEC_PER_SEC * 2); nm_device_update_link_active (dev, FALSE); nm_device_get_ap_address (dev, &addr); if (nm_ethernet_address_is_valid (&addr) && nm_device_get_essid (dev)) { nm_device_get_ap_address (dev, ap_addr); fprintf (stderr, " found!\n"); return (TRUE); } else { fprintf (stderr, " not found\n"); return (FALSE); } } /* * nm_device_find_and_use_essid * * Given an essid, attempt to associate with that ESSID even if we can't * see it in our scan. If we successfully find it, mark that network as * our "best" and use it during the next activation. * * Returns: TRUE on success * FALSE on failure */ gboolean nm_device_find_and_use_essid (NMDevice *dev, const char *essid) { struct ether_addr ap_addr; NMAccessPoint *ap = NULL; gboolean success = FALSE; g_return_val_if_fail (dev != NULL, FALSE); g_return_val_if_fail (nm_device_is_wireless (dev), FALSE); g_return_val_if_fail (dev->app_data != NULL, FALSE); g_return_val_if_fail (essid != NULL, FALSE); syslog (LOG_DEBUG, "Forcing AP '%s'", essid); /* If the network exists, make sure it has the correct ESSID set * (it might have been a blank ESSID up to this point) and use it. */ nm_device_deactivate (dev, FALSE); if (nm_device_wireless_network_exists (dev, essid, &ap_addr)) { if (!(ap = nm_ap_list_get_ap_by_essid (nm_device_ap_list_get (dev), essid))) { if ((ap = nm_device_ap_list_get_ap_by_address (dev, &ap_addr))) { NMAccessPoint *tmp_ap; nm_ap_set_essid (ap, essid); /* Now that this AP has an essid, copy over encryption keys and whatnot */ if ((tmp_ap = nm_ap_list_get_ap_by_essid (dev->app_data->allowed_ap_list, essid))) { nm_ap_set_invalid (ap, nm_ap_get_invalid (tmp_ap)); nm_ap_set_enc_key_source (ap, nm_ap_get_enc_key_source (tmp_ap), nm_ap_get_enc_method (tmp_ap)); nm_ap_set_timestamp (ap, nm_ap_get_timestamp (tmp_ap)); } } } } /* If we found a valid access point, use it */ if (ap) { nm_device_set_best_ap (dev, ap); nm_device_freeze_best_ap (dev); nm_device_activation_cancel (dev); success = TRUE; } return (success); } /* * nm_device_do_normal_scan * * Scan for access points on cards that support wireless scanning. * */ static void nm_device_do_normal_scan (NMDevice *dev) { int iwlib_socket; NMData *data; g_return_if_fail (dev != NULL); g_return_if_fail (dev->app_data != NULL); /* Test devices shouldn't get here since we fake the AP list earlier */ g_return_if_fail (!dev->test_device); data = (NMData *)dev->app_data; /* Device must be up before we can scan */ if (!nm_device_is_up (dev)) nm_device_bring_up (dev); g_usleep (G_USEC_PER_SEC); iwlib_socket = iw_sockets_open (); if (iwlib_socket >= 0) { wireless_scan_head scan_results = { NULL, 0 }; wireless_scan *tmp_ap; int err; NMAccessPointList *old_ap_list = NULL; NMAccessPointList *temp_list; gboolean have_blank_essids = FALSE; err = iw_scan (iwlib_socket, nm_device_get_iface (dev), WIRELESS_EXT, &scan_results); if ((err == -1) && (errno == ENODATA)) { /* Card hasn't had time yet to compile full access point list. * Give it some more time and scan again. If that doesn't work * give up. */ g_usleep (G_USEC_PER_SEC / 2); err = iw_scan (iwlib_socket, nm_device_get_iface (dev), WIRELESS_EXT, &scan_results); if (err == -1) { close (iwlib_socket); return; } } /* New list for current scan data */ temp_list = nm_ap_list_new (NETWORK_TYPE_DEVICE); if (!temp_list) { nm_dispose_scan_results (scan_results.result); close (iwlib_socket); return; } /* Shift all previous cached scan results and dispose of the oldest one. */ if (dev->options.wireless.cached_ap_list4) nm_ap_list_unref (dev->options.wireless.cached_ap_list4); dev->options.wireless.cached_ap_list4 = dev->options.wireless.cached_ap_list3; dev->options.wireless.cached_ap_list3 = dev->options.wireless.cached_ap_list2; dev->options.wireless.cached_ap_list2 = dev->options.wireless.cached_ap_list1; dev->options.wireless.cached_ap_list1 = temp_list; /* Iterate over scan results and pick a "most" preferred access point. */ tmp_ap = scan_results.result; while (tmp_ap) { /* We need at least an ESSID or a MAC address for each access point */ if (tmp_ap->b.has_essid || tmp_ap->has_ap_addr) { NMAccessPoint *nm_ap = nm_ap_new (); /* Copy over info from scan to local structure */ if (!tmp_ap->b.has_essid || (tmp_ap->b.essid && !strlen (tmp_ap->b.essid))) { nm_ap_set_essid (nm_ap, NULL); have_blank_essids = TRUE; } else nm_ap_set_essid (nm_ap, tmp_ap->b.essid); if (tmp_ap->b.has_key && (tmp_ap->b.key_flags & IW_ENCODE_DISABLED)) nm_ap_set_encrypted (nm_ap, FALSE); else nm_ap_set_encrypted (nm_ap, TRUE); if (tmp_ap->has_ap_addr) nm_ap_set_address (nm_ap, (const struct ether_addr *)(tmp_ap->ap_addr.sa_data)); nm_ap_set_strength (nm_ap, nm_wireless_qual_to_percent (dev, &(tmp_ap->stats.qual))); if (tmp_ap->b.has_freq) nm_ap_set_freq (nm_ap, tmp_ap->b.freq); /* Add the AP to the device's AP list */ nm_ap_list_append_ap (dev->options.wireless.cached_ap_list1, nm_ap); } tmp_ap = tmp_ap->next; } nm_dispose_scan_results (scan_results.result); close (iwlib_socket); /* Compose the current access point list for the card based on the past two scans. This * is to achieve some stability in the list, since cards don't necessarily return the same * access point list each scan even if you are standing in the same place. * Once we have the list, copy in any relevant information from our Allowed list. */ old_ap_list = nm_device_ap_list_get (dev); dev->options.wireless.ap_list = nm_ap_list_combine (dev->options.wireless.cached_ap_list1, dev->options.wireless.cached_ap_list2); nm_ap_list_copy_properties (nm_device_ap_list_get (dev), dev->app_data->allowed_ap_list); /* If any blank ESSID networks were detected in the current scan, try to match their * AP MAC address with existing ones in previous scans, and if we get a match, copy the * ESSID over to the newest scan list. This enures that we keep the known ESSID for that * base station around as long as possible, which allows nm_device_update_best_ap() to do * its job when the user wanted us to connect to a non-broadcasting network. */ if (have_blank_essids) nm_ap_list_copy_essids_by_address (nm_device_ap_list_get (dev), old_ap_list); nm_ap_list_unref (old_ap_list); /* Generate the "old" list from the 3rd and 4th oldest scans we've done */ old_ap_list = nm_ap_list_combine (dev->options.wireless.cached_ap_list3, dev->options.wireless.cached_ap_list4); /* Now do a diff of the old and new networks that we can see, and * signal any changes over dbus, but only if we are active device. */ nm_ap_list_diff (dev->app_data, dev, old_ap_list, nm_device_ap_list_get (dev)); if (old_ap_list) nm_ap_list_unref (old_ap_list); } else syslog (LOG_ERR, "nm_device_do_normal_scan() could not get a control socket for the wireless card %s.", nm_device_get_iface (dev) ); } /* * nm_device_do_pseudo_scan * * Brute-force the allowed access point list to find one that works, if any. * * FIXME * There's probably a better way to do the non-scanning access point discovery * than brute forcing it like this, but that makes the state machine here oh so * much more complicated. */ static void nm_device_do_pseudo_scan (NMDevice *dev) { NMAPListIter *iter; NMAccessPoint *ap; g_return_if_fail (dev != NULL); g_return_if_fail (dev->app_data != NULL); /* Test devices shouldn't get here since we fake the AP list earlier */ g_return_if_fail (!dev->test_device); nm_device_ref (dev); if (!(iter = nm_ap_list_iter_new (dev->app_data->allowed_ap_list))) return; nm_device_set_essid (dev, ""); while ((ap = nm_ap_list_iter_next (iter))) { gboolean valid = FALSE; struct ether_addr save_ap_addr; struct ether_addr cur_ap_addr; if (!nm_device_is_up (dev)); nm_device_bring_up (dev); /* Save the MAC address */ nm_device_get_ap_address (dev, &save_ap_addr); nm_device_set_essid (dev, nm_ap_get_essid (ap)); if (nm_ap_get_enc_key_source (ap)) { char *hashed_key = nm_ap_get_enc_key_hashed (ap); nm_device_set_enc_key (dev, hashed_key); g_free (hashed_key); } else nm_device_set_enc_key (dev, NULL); /* Wait a bit for association */ g_usleep (G_USEC_PER_SEC); /* Do we have a valid MAC address? */ nm_device_get_ap_address (dev, &cur_ap_addr); valid = nm_ethernet_address_is_valid (&cur_ap_addr); /* If the ap address we had before, and the ap address we * have now, are the same, AP is invalid. Certain cards (orinoco) * will let the essid change, but the the card won't actually de-associate * from the previous access point if it can't associate with the new one * (ie signal too weak, etc). */ if (valid && (memcmp (&save_ap_addr, &cur_ap_addr, sizeof (struct ether_addr)) == 0)) valid = FALSE; if (valid) { syslog(LOG_INFO, "%s: setting AP '%s' best", nm_device_get_iface (dev), nm_ap_get_essid (ap)); nm_device_set_best_ap (dev, ap); nm_data_mark_state_changed (dev->app_data); break; } } nm_ap_list_iter_free (iter); nm_device_unref (dev); } /* * nm_device_fake_ap_list * * Fake the access point list, used for test devices. * */ static void nm_device_fake_ap_list (NMDevice *dev) { #define NUM_FAKE_APS 4 int i; NMAccessPointList *old_ap_list = nm_device_ap_list_get (dev); char *fake_essids[NUM_FAKE_APS] = { "green", "bay", "packers", "rule" }; struct ether_addr fake_addrs[NUM_FAKE_APS] = {{{0x70, 0x37, 0x03, 0x70, 0x37, 0x03}}, {{0x12, 0x34, 0x56, 0x78, 0x90, 0xab}}, {{0xcd, 0xef, 0x12, 0x34, 0x56, 0x78}}, {{0x90, 0xab, 0xcd, 0xef, 0x12, 0x34}} }; guint8 fake_qualities[NUM_FAKE_APS] = { 150, 26, 200, 100 }; double fake_freqs[NUM_FAKE_APS] = { 3.1416, 4.1416, 5.1415, 6.1415 }; gboolean fake_enc[NUM_FAKE_APS] = { FALSE, TRUE, FALSE, TRUE }; g_return_if_fail (dev != NULL); g_return_if_fail (dev->app_data != NULL); dev->options.wireless.ap_list = nm_ap_list_new (NETWORK_TYPE_DEVICE); for (i = 0; i < NUM_FAKE_APS; i++) { NMAccessPoint *nm_ap = nm_ap_new (); NMAccessPoint *list_ap; /* Copy over info from scan to local structure */ nm_ap_set_essid (nm_ap, fake_essids[i]); if (fake_enc[i]) nm_ap_set_encrypted (nm_ap, FALSE); else nm_ap_set_encrypted (nm_ap, TRUE); nm_ap_set_address (nm_ap, (const struct ether_addr *)(&fake_addrs[i])); nm_ap_set_strength (nm_ap, fake_qualities[i]); nm_ap_set_freq (nm_ap, fake_freqs[i]); /* Merge settings from wireless networks, mainly Keys */ if ((list_ap = nm_ap_list_get_ap_by_essid (dev->app_data->allowed_ap_list, nm_ap_get_essid (nm_ap)))) { nm_ap_set_timestamp (nm_ap, nm_ap_get_timestamp (list_ap)); nm_ap_set_enc_key_source (nm_ap, nm_ap_get_enc_key_source (list_ap), nm_ap_get_enc_method (list_ap)); } /* Add the AP to the device's AP list */ nm_device_ap_list_add_ap (dev, nm_ap); } if (dev == dev->app_data->active_device) nm_ap_list_diff (dev->app_data, dev, old_ap_list, nm_device_ap_list_get (dev)); if (old_ap_list) nm_ap_list_unref (old_ap_list); } /* * nm_device_do_wireless_scan * * Get a list of access points this device can see. * */ void nm_device_do_wireless_scan (NMDevice *dev) { g_return_if_fail (dev != NULL); g_return_if_fail (dev->app_data != NULL); g_return_if_fail (nm_device_is_wireless (dev)); if (!nm_try_acquire_mutex (dev->options.wireless.scan_mutex, __FUNCTION__)) return; /* Compose a fake list of access points */ if (dev->test_device) { nm_device_fake_ap_list (dev); nm_unlock_mutex (dev->options.wireless.scan_mutex, __FUNCTION__); return; } if (nm_device_get_supports_wireless_scan (dev)) nm_device_do_normal_scan (dev); else { struct ether_addr ap_addr; /* We can't pseudo-scan without switching APs, therefore * if the card has a valid access point and its an allowed * access point, don't pseudo-scan for others. */ nm_device_get_ap_address (dev, &ap_addr); if ( !nm_ethernet_address_is_valid (&ap_addr) || !nm_ap_list_get_ap_by_essid (dev->app_data->allowed_ap_list, nm_device_get_essid (dev)) || !nm_device_get_best_ap (dev)) { nm_device_do_pseudo_scan (dev); } } nm_unlock_mutex (dev->options.wireless.scan_mutex, __FUNCTION__); } /* System config data accessors */ gboolean nm_device_config_get_use_dhcp (NMDevice *dev) { g_return_val_if_fail (dev != NULL, 0); return (dev->config_info.use_dhcp); } void nm_device_config_set_use_dhcp (NMDevice *dev, gboolean use_dhcp) { g_return_if_fail (dev != NULL); dev->config_info.use_dhcp = use_dhcp; } guint32 nm_device_config_get_ip4_address (NMDevice *dev) { g_return_val_if_fail (dev != NULL, 0); return (dev->config_info.ip4_address); } void nm_device_config_set_ip4_address (NMDevice *dev, guint32 addr) { g_return_if_fail (dev != NULL); dev->config_info.ip4_address = addr; } guint32 nm_device_config_get_ip4_gateway (NMDevice *dev) { g_return_val_if_fail (dev != NULL, 0); return (dev->config_info.ip4_gateway); } void nm_device_config_set_ip4_gateway (NMDevice *dev, guint32 gateway) { g_return_if_fail (dev != NULL); dev->config_info.ip4_gateway = gateway; } guint32 nm_device_config_get_ip4_netmask (NMDevice *dev) { g_return_val_if_fail (dev != NULL, 0); return (dev->config_info.ip4_netmask); } void nm_device_config_set_ip4_netmask (NMDevice *dev, guint32 netmask) { g_return_if_fail (dev != NULL); dev->config_info.ip4_netmask = netmask; } guint32 nm_device_config_get_ip4_broadcast (NMDevice *dev) { g_return_val_if_fail (dev != NULL, 0); return (dev->config_info.ip4_broadcast); } void nm_device_config_set_ip4_broadcast (NMDevice *dev, guint32 broadcast) { g_return_if_fail (dev != NULL); dev->config_info.ip4_broadcast = broadcast; } /****************************************/ /* Code ripped from HAL */ /* minor modifications made for */ /* integration with NLM */ /****************************************/ /** Read a word from the MII transceiver management registers * * @param iface Which interface * @param location Which register * @return Word that is read */ static guint16 mdio_read (int sockfd, struct ifreq *ifr, int location, gboolean new_ioctl_nums) { guint16 *data = (guint16 *) &(ifr->ifr_data); data[1] = location; if (ioctl (sockfd, new_ioctl_nums ? 0x8948 : SIOCDEVPRIVATE + 1, ifr) < 0) { syslog(LOG_ERR, "SIOCGMIIREG on %s failed: %s", ifr->ifr_name, strerror (errno)); return -1; } return data[3]; } static gboolean mii_get_link (NMDevice *dev) { int sockfd; struct ifreq ifr; gboolean new_ioctl_nums; guint16 status_word; gboolean link_active = FALSE; sockfd = socket (AF_INET, SOCK_DGRAM, 0); if (sockfd < 0) { syslog (LOG_ERR, "cannot open socket on interface %s; errno=%d", nm_device_get_iface (dev), errno); return (FALSE); } snprintf (ifr.ifr_name, IFNAMSIZ, nm_device_get_iface (dev)); if (ioctl (sockfd, 0x8947, &ifr) >= 0) new_ioctl_nums = TRUE; else if (ioctl (sockfd, SIOCDEVPRIVATE, &ifr) >= 0) new_ioctl_nums = FALSE; else { syslog (LOG_ERR, "SIOCGMIIPHY on %s failed: %s", ifr.ifr_name, strerror (errno)); close (sockfd); return (FALSE); } /* Refer to http://www.scyld.com/diag/mii-status.html for * the full explanation of the numbers * * 0x8000 Capable of 100baseT4. * 0x7800 Capable of 10/100 HD/FD (most common). * 0x0040 Preamble suppression permitted. * 0x0020 Autonegotiation complete. * 0x0010 Remote fault. * 0x0008 Capable of Autonegotiation. * 0x0004 Link established ("sticky"* on link failure) * 0x0002 Jabber detected ("sticky"* on transmit jabber) * 0x0001 Extended MII register exist. * */ /* We have to read it twice to clear any "sticky" bits */ status_word = mdio_read (sockfd, &ifr, 1, new_ioctl_nums); status_word = mdio_read (sockfd, &ifr, 1, new_ioctl_nums); if ((status_word & 0x0016) == 0x0004) link_active = TRUE; else link_active = FALSE; close (sockfd); return (link_active); } /****************************************/ /* End Code ripped from HAL */ /****************************************/ /****************************************/ /* Test device routes */ /****************************************/ /* * nm_device_is_test_device * */ gboolean nm_device_is_test_device (NMDevice *dev) { g_return_val_if_fail (dev != NULL, FALSE); return (dev->test_device); }