diff options
Diffstat (limited to 'net/wireless/nl80211.c')
-rw-r--r-- | net/wireless/nl80211.c | 440 |
1 files changed, 403 insertions, 37 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index a001ea32cb7..e447db04cf7 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -1,7 +1,7 @@ /* * This is the new netlink-based wireless configuration interface. * - * Copyright 2006-2009 Johannes Berg <johannes@sipsolutions.net> + * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> */ #include <linux/if.h> @@ -145,6 +145,10 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = { [NL80211_ATTR_DURATION] = { .type = NLA_U32 }, [NL80211_ATTR_COOKIE] = { .type = NLA_U64 }, [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED }, + [NL80211_ATTR_FRAME] = { .type = NLA_BINARY, + .len = IEEE80211_MAX_DATA_LEN }, + [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, }, + [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 }, }; /* policy for the attributes */ @@ -576,6 +580,7 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags, CMD(flush_pmksa, FLUSH_PMKSA); CMD(remain_on_channel, REMAIN_ON_CHANNEL); CMD(set_bitrate_mask, SET_TX_BITRATE_MASK); + CMD(action, ACTION); if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) { i++; NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS); @@ -2009,6 +2014,9 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info) if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) return -EINVAL; + if (!info->attrs[NL80211_ATTR_STA_AID]) + return -EINVAL; + mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); params.supported_rates = nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]); @@ -2017,11 +2025,9 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info) params.listen_interval = nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]); - if (info->attrs[NL80211_ATTR_STA_AID]) { - params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]); - if (!params.aid || params.aid > IEEE80211_MAX_AID) - return -EINVAL; - } + params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]); + if (!params.aid || params.aid > IEEE80211_MAX_AID) + return -EINVAL; if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) params.ht_capa = @@ -2036,6 +2042,12 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info) if (err) goto out_rtnl; + if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && + dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) { + err = -EINVAL; + goto out; + } + err = get_vlan(info, rdev, ¶ms.vlan); if (err) goto out; @@ -2043,35 +2055,6 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info) /* validate settings */ err = 0; - switch (dev->ieee80211_ptr->iftype) { - case NL80211_IFTYPE_AP: - case NL80211_IFTYPE_AP_VLAN: - /* all ok but must have AID */ - if (!params.aid) - err = -EINVAL; - break; - case NL80211_IFTYPE_MESH_POINT: - /* disallow things mesh doesn't support */ - if (params.vlan) - err = -EINVAL; - if (params.aid) - err = -EINVAL; - if (params.ht_capa) - err = -EINVAL; - if (params.listen_interval >= 0) - err = -EINVAL; - if (params.supported_rates) - err = -EINVAL; - if (params.sta_flags_mask) - err = -EINVAL; - break; - default: - err = -EINVAL; - } - - if (err) - goto out; - if (!rdev->ops->add_station) { err = -EOPNOTSUPP; goto out; @@ -2112,8 +2095,7 @@ static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info) goto out_rtnl; if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && - dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN && - dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) { + dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) { err = -EINVAL; goto out; } @@ -4545,6 +4527,257 @@ static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb, return err; } +static int nl80211_register_action(struct sk_buff *skb, struct genl_info *info) +{ + struct cfg80211_registered_device *rdev; + struct net_device *dev; + int err; + + if (!info->attrs[NL80211_ATTR_FRAME_MATCH]) + return -EINVAL; + + if (nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]) < 1) + return -EINVAL; + + rtnl_lock(); + + err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev); + if (err) + goto unlock_rtnl; + + if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) { + err = -EOPNOTSUPP; + goto out; + } + + /* not much point in registering if we can't reply */ + if (!rdev->ops->action) { + err = -EOPNOTSUPP; + goto out; + } + + err = cfg80211_mlme_register_action(dev->ieee80211_ptr, info->snd_pid, + nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]), + nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH])); + out: + cfg80211_unlock_rdev(rdev); + dev_put(dev); + unlock_rtnl: + rtnl_unlock(); + return err; +} + +static int nl80211_action(struct sk_buff *skb, struct genl_info *info) +{ + struct cfg80211_registered_device *rdev; + struct net_device *dev; + struct ieee80211_channel *chan; + enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT; + u32 freq; + int err; + void *hdr; + u64 cookie; + struct sk_buff *msg; + + if (!info->attrs[NL80211_ATTR_FRAME] || + !info->attrs[NL80211_ATTR_WIPHY_FREQ]) + return -EINVAL; + + rtnl_lock(); + + err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev); + if (err) + goto unlock_rtnl; + + if (!rdev->ops->action) { + err = -EOPNOTSUPP; + goto out; + } + + if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) { + err = -EOPNOTSUPP; + goto out; + } + + if (!netif_running(dev)) { + err = -ENETDOWN; + goto out; + } + + if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) { + channel_type = nla_get_u32( + info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]); + if (channel_type != NL80211_CHAN_NO_HT && + channel_type != NL80211_CHAN_HT20 && + channel_type != NL80211_CHAN_HT40PLUS && + channel_type != NL80211_CHAN_HT40MINUS) + err = -EINVAL; + goto out; + } + + freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]); + chan = rdev_freq_to_chan(rdev, freq, channel_type); + if (chan == NULL) { + err = -EINVAL; + goto out; + } + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) { + err = -ENOMEM; + goto out; + } + + hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, + NL80211_CMD_ACTION); + + if (IS_ERR(hdr)) { + err = PTR_ERR(hdr); + goto free_msg; + } + err = cfg80211_mlme_action(rdev, dev, chan, channel_type, + nla_data(info->attrs[NL80211_ATTR_FRAME]), + nla_len(info->attrs[NL80211_ATTR_FRAME]), + &cookie); + if (err) + goto free_msg; + + NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie); + + genlmsg_end(msg, hdr); + err = genlmsg_reply(msg, info); + goto out; + + nla_put_failure: + err = -ENOBUFS; + free_msg: + nlmsg_free(msg); + out: + cfg80211_unlock_rdev(rdev); + dev_put(dev); +unlock_rtnl: + rtnl_unlock(); + return err; +} + +static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info) +{ + struct cfg80211_registered_device *rdev; + struct wireless_dev *wdev; + struct net_device *dev; + u8 ps_state; + bool state; + int err; + + if (!info->attrs[NL80211_ATTR_PS_STATE]) { + err = -EINVAL; + goto out; + } + + ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]); + + if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED) { + err = -EINVAL; + goto out; + } + + rtnl_lock(); + + err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev); + if (err) + goto unlock_rdev; + + wdev = dev->ieee80211_ptr; + + if (!rdev->ops->set_power_mgmt) { + err = -EOPNOTSUPP; + goto unlock_rdev; + } + + state = (ps_state == NL80211_PS_ENABLED) ? true : false; + + if (state == wdev->ps) + goto unlock_rdev; + + wdev->ps = state; + + if (rdev->ops->set_power_mgmt(wdev->wiphy, dev, wdev->ps, + wdev->ps_timeout)) + /* assume this means it's off */ + wdev->ps = false; + +unlock_rdev: + cfg80211_unlock_rdev(rdev); + dev_put(dev); + rtnl_unlock(); + +out: + return err; +} + +static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info) +{ + struct cfg80211_registered_device *rdev; + enum nl80211_ps_state ps_state; + struct wireless_dev *wdev; + struct net_device *dev; + struct sk_buff *msg; + void *hdr; + int err; + + rtnl_lock(); + + err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev); + if (err) + goto unlock_rtnl; + + wdev = dev->ieee80211_ptr; + + if (!rdev->ops->set_power_mgmt) { + err = -EOPNOTSUPP; + goto out; + } + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) { + err = -ENOMEM; + goto out; + } + + hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0, + NL80211_CMD_GET_POWER_SAVE); + if (!hdr) { + err = -ENOMEM; + goto free_msg; + } + + if (wdev->ps) + ps_state = NL80211_PS_ENABLED; + else + ps_state = NL80211_PS_DISABLED; + + NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state); + + genlmsg_end(msg, hdr); + err = genlmsg_reply(msg, info); + goto out; + +nla_put_failure: + err = -ENOBUFS; + +free_msg: + nlmsg_free(msg); + +out: + cfg80211_unlock_rdev(rdev); + dev_put(dev); + +unlock_rtnl: + rtnl_unlock(); + + return err; +} + static struct genl_ops nl80211_ops[] = { { .cmd = NL80211_CMD_GET_WIPHY, @@ -4825,6 +5058,30 @@ static struct genl_ops nl80211_ops[] = { .policy = nl80211_policy, .flags = GENL_ADMIN_PERM, }, + { + .cmd = NL80211_CMD_REGISTER_ACTION, + .doit = nl80211_register_action, + .policy = nl80211_policy, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = NL80211_CMD_ACTION, + .doit = nl80211_action, + .policy = nl80211_policy, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = NL80211_CMD_SET_POWER_SAVE, + .doit = nl80211_set_power_save, + .policy = nl80211_policy, + .flags = GENL_ADMIN_PERM, + }, + { + .cmd = NL80211_CMD_GET_POWER_SAVE, + .doit = nl80211_get_power_save, + .policy = nl80211_policy, + /* can be retrieved by unprivileged users */ + }, }; static struct genl_multicast_group nl80211_mlme_mcgrp = { @@ -5497,6 +5754,110 @@ void nl80211_send_sta_event(struct cfg80211_registered_device *rdev, nl80211_mlme_mcgrp.id, gfp); } +int nl80211_send_action(struct cfg80211_registered_device *rdev, + struct net_device *netdev, u32 nlpid, + int freq, const u8 *buf, size_t len, gfp_t gfp) +{ + struct sk_buff *msg; + void *hdr; + int err; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); + if (!msg) + return -ENOMEM; + + hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ACTION); + if (!hdr) { + nlmsg_free(msg); + return -ENOMEM; + } + + NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); + NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); + NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq); + NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf); + + err = genlmsg_end(msg, hdr); + if (err < 0) { + nlmsg_free(msg); + return err; + } + + err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid); + if (err < 0) + return err; + return 0; + + nla_put_failure: + genlmsg_cancel(msg, hdr); + nlmsg_free(msg); + return -ENOBUFS; +} + +void nl80211_send_action_tx_status(struct cfg80211_registered_device *rdev, + struct net_device *netdev, u64 cookie, + const u8 *buf, size_t len, bool ack, + gfp_t gfp) +{ + struct sk_buff *msg; + void *hdr; + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp); + if (!msg) + return; + + hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ACTION_TX_STATUS); + if (!hdr) { + nlmsg_free(msg); + return; + } + + NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx); + NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex); + NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf); + NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie); + if (ack) + NLA_PUT_FLAG(msg, NL80211_ATTR_ACK); + + if (genlmsg_end(msg, hdr) < 0) { + nlmsg_free(msg); + return; + } + + genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp); + return; + + nla_put_failure: + genlmsg_cancel(msg, hdr); + nlmsg_free(msg); +} + +static int nl80211_netlink_notify(struct notifier_block * nb, + unsigned long state, + void *_notify) +{ + struct netlink_notify *notify = _notify; + struct cfg80211_registered_device *rdev; + struct wireless_dev *wdev; + + if (state != NETLINK_URELEASE) + return NOTIFY_DONE; + + rcu_read_lock(); + + list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) + list_for_each_entry_rcu(wdev, &rdev->netdev_list, list) + cfg80211_mlme_unregister_actions(wdev, notify->pid); + + rcu_read_unlock(); + + return NOTIFY_DONE; +} + +static struct notifier_block nl80211_netlink_notifier = { + .notifier_call = nl80211_netlink_notify, +}; + /* initialisation/exit functions */ int nl80211_init(void) @@ -5530,6 +5891,10 @@ int nl80211_init(void) goto err_out; #endif + err = netlink_register_notifier(&nl80211_netlink_notifier); + if (err) + goto err_out; + return 0; err_out: genl_unregister_family(&nl80211_fam); @@ -5538,5 +5903,6 @@ int nl80211_init(void) void nl80211_exit(void) { + netlink_unregister_notifier(&nl80211_netlink_notifier); genl_unregister_family(&nl80211_fam); } |