diff options
| -rw-r--r-- | include/linux/nl80211.h | 25 | ||||
| -rw-r--r-- | include/net/cfg80211.h | 57 | ||||
| -rw-r--r-- | net/wireless/core.c | 12 | ||||
| -rw-r--r-- | net/wireless/core.h | 7 | ||||
| -rw-r--r-- | net/wireless/nl80211.c | 250 | ||||
| -rw-r--r-- | net/wireless/nl80211.h | 4 | ||||
| -rw-r--r-- | net/wireless/scan.c | 70 |
7 files changed, 424 insertions, 1 deletions
diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h index de96783954a1..f8b5595ba4af 100644 --- a/include/linux/nl80211.h +++ b/include/linux/nl80211.h @@ -203,6 +203,26 @@ * @NL80211_CMD_SCAN_ABORTED: scan was aborted, for unspecified reasons, * partial scan results may be available * + * @NL80211_CMD_START_SCHED_SCAN: start a scheduled scan. Like with normal + * scans, if SSIDs (%NL80211_ATTR_SCAN_SSIDS) are passed, they are used + * in the probe requests. For broadcast, a broadcast SSID must be + * passed (ie. an empty string). If no SSID is passed, no probe + * requests are sent and a passive scan is performed. + * %NL80211_ATTR_SCAN_FREQUENCIES, if passed, define which channels + * should be scanned; if not passed, all channels allowed for the + * current regulatory domain are used. Extra IEs can also be passed + * from the userspace by using the %NL80211_ATTR_IE attribute. + * @NL80211_CMD_STOP_SCHED_SCAN: stop a scheduled scan + * @NL80211_CMD_SCHED_SCAN_RESULTS: indicates that there are scheduled scan + * results available. + * @NL80211_CMD_SCHED_SCAN_STOPPED: indicates that the scheduled scan has + * stopped. The driver may issue this event at any time during a + * scheduled scan. One reason for stopping the scan is if the hardware + * does not support starting an association or a normal scan while running + * a scheduled scan. This event is also sent when the + * %NL80211_CMD_STOP_SCHED_SCAN command is received or when the interface + * is brought down while a scheduled scan was running. + * * @NL80211_CMD_GET_SURVEY: get survey resuls, e.g. channel occupation * or noise level * @NL80211_CMD_NEW_SURVEY_RESULTS: survey data notification (as a reply to @@ -545,6 +565,11 @@ enum nl80211_commands { NL80211_CMD_GET_WOWLAN, NL80211_CMD_SET_WOWLAN, + NL80211_CMD_START_SCHED_SCAN, + NL80211_CMD_STOP_SCHED_SCAN, + NL80211_CMD_SCHED_SCAN_RESULTS, + NL80211_CMD_SCHED_SCAN_STOPPED, + /* add new commands above here */ /* used to define NL80211_CMD_MAX below */ diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 4b0d035be64f..e214c85b74d2 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -824,6 +824,33 @@ struct cfg80211_scan_request { }; /** + * struct cfg80211_sched_scan_request - scheduled scan request description + * + * @ssids: SSIDs to scan for (passed in the probe_reqs in active scans) + * @n_ssids: number of SSIDs + * @n_channels: total number of channels to scan + * @ie: optional information element(s) to add into Probe Request or %NULL + * @ie_len: length of ie in octets + * @wiphy: the wiphy this was for + * @dev: the interface + * @channels: channels to scan + */ +struct cfg80211_sched_scan_request { + struct cfg80211_ssid *ssids; + int n_ssids; + u32 n_channels; + const u8 *ie; + size_t ie_len; + + /* internal */ + struct wiphy *wiphy; + struct net_device *dev; + + /* keep last */ + struct ieee80211_channel *channels[0]; +}; + +/** * enum cfg80211_signal_type - signal type * * @CFG80211_SIGNAL_TYPE_NONE: no signal strength information available @@ -1292,6 +1319,10 @@ struct cfg80211_wowlan { * @set_power_mgmt: Configure WLAN power management. A timeout value of -1 * allows the driver to adjust the dynamic ps timeout value. * @set_cqm_rssi_config: Configure connection quality monitor RSSI threshold. + * @sched_scan_start: Tell the driver to start a scheduled scan. + * @sched_scan_stop: Tell the driver to stop an ongoing scheduled + * scan. The driver_initiated flag specifies whether the driver + * itself has informed that the scan has stopped. * * @mgmt_frame_register: Notify driver that a management frame type was * registered. Note that this callback may not sleep, and cannot run @@ -1478,6 +1509,12 @@ struct cfg80211_ops { int (*set_ringparam)(struct wiphy *wiphy, u32 tx, u32 rx); void (*get_ringparam)(struct wiphy *wiphy, u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); + + int (*sched_scan_start)(struct wiphy *wiphy, + struct net_device *dev, + struct cfg80211_sched_scan_request *request); + int (*sched_scan_stop)(struct wiphy *wiphy, struct net_device *dev, + bool driver_initiated); }; /* @@ -1522,6 +1559,7 @@ struct cfg80211_ops { * @WIPHY_FLAG_IBSS_RSN: The device supports IBSS RSN. * @WIPHY_FLAG_MESH_AUTH: The device supports mesh authentication by routing * auth frames to userspace. See @NL80211_MESH_SETUP_USERSPACE_AUTH. + * @WIPHY_FLAG_SCHED_SCAN: The device supports scheduled scans. */ enum wiphy_flags { WIPHY_FLAG_CUSTOM_REGULATORY = BIT(0), @@ -1534,6 +1572,7 @@ enum wiphy_flags { WIPHY_FLAG_CONTROL_PORT_PROTOCOL = BIT(7), WIPHY_FLAG_IBSS_RSN = BIT(8), WIPHY_FLAG_MESH_AUTH = BIT(10), + WIPHY_FLAG_SUPPORTS_SCHED_SCAN = BIT(11), }; struct mac_address { @@ -2355,6 +2394,24 @@ int cfg80211_wext_siwpmksa(struct net_device *dev, void cfg80211_scan_done(struct cfg80211_scan_request *request, bool aborted); /** + * cfg80211_sched_scan_results - notify that new scan results are available + * + * @wiphy: the wiphy which got scheduled scan results + */ +void cfg80211_sched_scan_results(struct wiphy *wiphy); + +/** + * cfg80211_sched_scan_stopped - notify that the scheduled scan has stopped + * + * @wiphy: the wiphy on which the scheduled scan stopped + * + * The driver can call this function to inform cfg80211 that the + * scheduled scan had to be stopped, for whatever reason. The driver + * is then called back via the sched_scan_stop operation when done. + */ +void cfg80211_sched_scan_stopped(struct wiphy *wiphy); + +/** * cfg80211_inform_bss_frame - inform cfg80211 of a received BSS frame * * @wiphy: the wiphy reporting the BSS diff --git a/net/wireless/core.c b/net/wireless/core.c index bea0d80710c8..f924a49b2425 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -370,7 +370,8 @@ struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv) spin_lock_init(&rdev->bss_lock); INIT_LIST_HEAD(&rdev->bss_list); INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); - + INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results); + INIT_WORK(&rdev->sched_scan_stopped_wk, __cfg80211_sched_scan_stopped); #ifdef CONFIG_CFG80211_WEXT rdev->wiphy.wext = &cfg80211_wext_handler; #endif @@ -672,6 +673,11 @@ static void wdev_cleanup_work(struct work_struct *work) ___cfg80211_scan_done(rdev, true); } + if (WARN_ON(rdev->sched_scan_req && + rdev->sched_scan_req->dev == wdev->netdev)) { + __cfg80211_stop_sched_scan(rdev, false); + } + cfg80211_unlock_rdev(rdev); mutex_lock(&rdev->devlist_mtx); @@ -759,6 +765,10 @@ static int cfg80211_netdev_notifier_call(struct notifier_block * nb, break; case NL80211_IFTYPE_P2P_CLIENT: case NL80211_IFTYPE_STATION: + cfg80211_lock_rdev(rdev); + __cfg80211_stop_sched_scan(rdev, false); + cfg80211_unlock_rdev(rdev); + wdev_lock(wdev); #ifdef CONFIG_CFG80211_WEXT kfree(wdev->wext.ie); diff --git a/net/wireless/core.h b/net/wireless/core.h index 7a18c10a7fb6..e3f7b1d995cd 100644 --- a/net/wireless/core.h +++ b/net/wireless/core.h @@ -60,8 +60,11 @@ struct cfg80211_registered_device { struct rb_root bss_tree; u32 bss_generation; struct cfg80211_scan_request *scan_req; /* protected by RTNL */ + struct cfg80211_sched_scan_request *sched_scan_req; unsigned long suspend_at; struct work_struct scan_done_wk; + struct work_struct sched_scan_results_wk; + struct work_struct sched_scan_stopped_wk; #ifdef CONFIG_NL80211_TESTMODE struct genl_info *testmode_info; @@ -411,6 +414,10 @@ void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len); void cfg80211_sme_disassoc(struct net_device *dev, int idx); void __cfg80211_scan_done(struct work_struct *wk); void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak); +void __cfg80211_sched_scan_results(struct work_struct *wk); +int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, + bool driver_initiated); +void __cfg80211_sched_scan_stopped(struct work_struct *wk); void cfg80211_upload_connect_keys(struct wireless_dev *wdev); int cfg80211_change_iface(struct cfg80211_registered_device *rdev, struct net_device *dev, enum nl80211_iftype ntype, diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 95dd5832e719..4fac370284c0 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -761,6 +761,8 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags, } CMD(set_channel, SET_CHANNEL); CMD(set_wds_peer, SET_WDS_PEER); + if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) + CMD(sched_scan_start, START_SCHED_SCAN); #undef CMD @@ -3357,6 +3359,179 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info) return err; } +static int nl80211_start_sched_scan(struct sk_buff *skb, + struct genl_info *info) +{ + struct cfg80211_sched_scan_request *request; + struct cfg80211_registered_device *rdev = info->user_ptr[0]; + struct net_device *dev = info->user_ptr[1]; + struct cfg80211_ssid *ssid; + struct ieee80211_channel *channel; + struct nlattr *attr; + struct wiphy *wiphy; + int err, tmp, n_ssids = 0, n_channels, i; + enum ieee80211_band band; + size_t ie_len; + + if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) || + !rdev->ops->sched_scan_start) + return -EOPNOTSUPP; + + if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE])) + return -EINVAL; + + if (rdev->sched_scan_req) + return -EINPROGRESS; + + wiphy = &rdev->wiphy; + + if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) { + n_channels = validate_scan_freqs( + info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]); + if (!n_channels) + return -EINVAL; + } else { + n_channels = 0; + + for (band = 0; band < IEEE80211_NUM_BANDS; band++) + if (wiphy->bands[band]) + n_channels += wiphy->bands[band]->n_channels; + } + + if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) + nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], + tmp) + n_ssids++; + + if (n_ssids > wiphy->max_scan_ssids) + return -EINVAL; + + if (info->attrs[NL80211_ATTR_IE]) + ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); + else + ie_len = 0; + + if (ie_len > wiphy->max_scan_ie_len) + return -EINVAL; + + request = kzalloc(sizeof(*request) + + sizeof(*ssid) * n_ssids + + sizeof(channel) * n_channels + + ie_len, GFP_KERNEL); + if (!request) + return -ENOMEM; + + if (n_ssids) + request->ssids = (void *)&request->channels[n_channels]; + request->n_ssids = n_ssids; + if (ie_len) { + if (request->ssids) + request->ie = (void *)(request->ssids + n_ssids); + else + request->ie = (void *)(request->channels + n_channels); + } + + i = 0; + if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) { + /* user specified, bail out if channel not found */ + nla_for_each_nested(attr, + info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], + tmp) { + struct ieee80211_channel *chan; + + chan = ieee80211_get_channel(wiphy, nla_get_u32(attr)); + + if (!chan) { + err = -EINVAL; + goto out_free; + } + + /* ignore disabled channels */ + if (chan->flags & IEEE80211_CHAN_DISABLED) + continue; + + request->channels[i] = chan; + i++; + } + } else { + /* all channels */ + for (band = 0; band < IEEE80211_NUM_BANDS; band++) { + int j; + if (!wiphy->bands[band]) + continue; + for (j = 0; j < wiphy->bands[band]->n_channels; j++) { + struct ieee80211_channel *chan; + + chan = &wiphy->bands[band]->channels[j]; + + if (chan->flags & IEEE80211_CHAN_DISABLED) + continue; + + request->channels[i] = chan; + i++; + } + } + } + + if (!i) { + err = -EINVAL; + goto out_free; + } + + request->n_channels = i; + + i = 0; + if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) { + nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], + tmp) { + if (request->ssids[i].ssid_len > + IEEE80211_MAX_SSID_LEN) { + err = -EINVAL; + goto out_free; + } + memcpy(request->ssids[i].ssid, nla_data(attr), + nla_len(attr)); + request->ssids[i].ssid_len = nla_len(attr); + i++; + } + } + + if (info->attrs[NL80211_ATTR_IE]) { + request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); + memcpy((void *)request->ie, + nla_data(info->attrs[NL80211_ATTR_IE]), + request->ie_len); + } + + request->dev = dev; + request->wiphy = &rdev->wiphy; + + err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request); + if (!err) { + rdev->sched_scan_req = request; + nl80211_send_sched_scan(rdev, dev, + NL80211_CMD_START_SCHED_SCAN); + goto out; + } + +out_free: + kfree(request); +out: + return err; +} + +static int nl80211_stop_sched_scan(struct sk_buff *skb, + struct genl_info *info) +{ + struct cfg80211_registered_device *rdev = info->user_ptr[0]; + + if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) || + !rdev->ops->sched_scan_stop) + return -EOPNOTSUPP; + + return __cfg80211_stop_sched_scan(rdev, false); +} + static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags, struct cfg80211_registered_device *rdev, struct wireless_dev *wdev, @@ -5327,6 +5502,22 @@ static struct genl_ops nl80211_ops[] = { .dumpit = nl80211_dump_scan, }, { + .cmd = NL80211_CMD_START_SCHED_SCAN, + .doit = nl80211_start_sched_scan, + .policy = nl80211_policy, + .flags = GENL_ADMIN_PERM, + .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | + NL80211_FLAG_NEED_RTNL, + }, + { + .cmd = NL80211_CMD_STOP_SCHED_SCAN, + .doit = nl80211_stop_sched_scan, + .policy = nl80211_policy, + .flags = GENL_ADMIN_PERM, + .internal_flags = NL80211_FLAG_NEED_NETDEV_UP | + NL80211_FLAG_NEED_RTNL, + }, + { .cmd = NL80211_CMD_AUTHENTICATE, .doit = nl80211_authenticate, .policy = nl80211_policy, @@ -5652,6 +5843,28 @@ static int nl80211_send_scan_msg(struct sk_buff *msg, return -EMSGSIZE; } +static int +nl80211_send_sched_scan_msg(struct sk_buff *msg, + struct cfg80211_registered_device *rdev, + struct net_device *netdev, + u32 pid, u32 seq, int flags, u32 cmd) +{ + void *hdr; + + hdr = nl80211hdr_put(msg, pid, seq, flags, cmd); + if (!hdr) + return -1; + + NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); + NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); + + return genlmsg_end(msg, hdr); + + nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + void nl80211_send_scan_start(struct cfg80211_registered_device *rdev, struct net_device *netdev) { @@ -5709,6 +5922,43 @@ void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev, nl80211_scan_mcgrp.id, GFP_KERNEL); } +void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev, + struct net_device *netdev) +{ + struct sk_buff *msg; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return; + + if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, + NL80211_CMD_SCHED_SCAN_RESULTS) < 0) { + nlmsg_free(msg); + return; + } + + genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, + nl80211_scan_mcgrp.id, GFP_KERNEL); +} + +void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev, + struct net_device *netdev, u32 cmd) +{ + struct sk_buff *msg; + + msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + if (!msg) + return; + + if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) { + nlmsg_free(msg); + return; + } + + genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0, + nl80211_scan_mcgrp.id, GFP_KERNEL); +} + /* * This can happen on global regulatory changes or device specific settings * based on custom world regulatory domains. diff --git a/net/wireless/nl80211.h b/net/wireless/nl80211.h index f2af6955a665..2f1bfb87a651 100644 --- a/net/wireless/nl80211.h +++ b/net/wireless/nl80211.h @@ -12,6 +12,10 @@ void nl80211_send_scan_done(struct cfg80211_registered_device *rdev, struct net_device *netdev); void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev, struct net_device *netdev); +void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev, + struct net_device *netdev, u32 cmd); +void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev, + struct net_device *netdev); void nl80211_send_reg_change_event(struct regulatory_request *request); void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev, struct net_device *netdev, diff --git a/net/wireless/scan.c b/net/wireless/scan.c index 62e542a2b192..65dfae3b9d41 100644 --- a/net/wireless/scan.c +++ b/net/wireless/scan.c @@ -93,6 +93,76 @@ void cfg80211_scan_done(struct cfg80211_scan_request *request, bool aborted) } EXPORT_SYMBOL(cfg80211_scan_done); +void __cfg80211_sched_scan_results(struct work_struct *wk) +{ + struct cfg80211_registered_device *rdev; + + rdev = container_of(wk, struct cfg80211_registered_device, + sched_scan_results_wk); + + cfg80211_lock_rdev(rdev); + + /* we don't have sched_scan_req anymore if the scan is stopping */ + if (rdev->sched_scan_req) + nl80211_send_sched_scan_results(rdev, + rdev->sched_scan_req->dev); + + cfg80211_unlock_rdev(rdev); +} + +void cfg80211_sched_scan_results(struct wiphy *wiphy) +{ + /* ignore if we're not scanning */ + if (wiphy_to_dev(wiphy)->sched_scan_req) + queue_work(cfg80211_wq, + &wiphy_to_dev(wiphy)->sched_scan_results_wk); +} +EXPORT_SYMBOL(cfg80211_sched_scan_results); + +void __cfg80211_sched_scan_stopped(struct work_struct *wk) +{ + struct cfg80211_registered_device *rdev; + + rdev = container_of(wk, struct cfg80211_registered_device, + sched_scan_stopped_wk); + + cfg80211_lock_rdev(rdev); + __cfg80211_stop_sched_scan(rdev, true); + cfg80211_unlock_rdev(rdev); +} + +void cfg80211_sched_scan_stopped(struct wiphy *wiphy) +{ + queue_work(cfg80211_wq, &wiphy_to_dev(wiphy)->sched_scan_stopped_wk); +} +EXPORT_SYMBOL(cfg80211_sched_scan_stopped); + +int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, + bool driver_initiated) +{ + int err; + struct net_device *dev; + + ASSERT_RDEV_LOCK(rdev); + + if (!rdev->sched_scan_req) + return 0; + + dev = rdev->sched_scan_req->dev; + + err = rdev->ops->sched_scan_stop(&rdev->wiphy, dev, + driver_initiated); + if (err) + return err; + + nl80211_send_sched_scan(rdev, dev, NL80211_CMD_SCHED_SCAN_STOPPED); + + kfree(rdev->sched_scan_req); + rdev->sched_scan_req = NULL; + + return err; +} + static void bss_release(struct kref *ref) { struct cfg80211_internal_bss *bss; |