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-rw-r--r--net/wireless/chan.c41
-rw-r--r--net/wireless/core.h3
-rw-r--r--net/wireless/mlme.c27
-rw-r--r--net/wireless/nl80211.c218
-rw-r--r--net/wireless/nl80211.h11
5 files changed, 285 insertions, 15 deletions
diff --git a/net/wireless/chan.c b/net/wireless/chan.c
index a46ac6c9b36..bf1737fc9a7 100644
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -41,44 +41,57 @@ rdev_fixed_channel(struct cfg80211_registered_device *rdev,
return result;
}
-int rdev_set_freq(struct cfg80211_registered_device *rdev,
- struct wireless_dev *for_wdev,
+struct ieee80211_channel *
+rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
int freq, enum nl80211_channel_type channel_type)
{
struct ieee80211_channel *chan;
struct ieee80211_sta_ht_cap *ht_cap;
- int result;
-
- if (rdev_fixed_channel(rdev, for_wdev))
- return -EBUSY;
-
- if (!rdev->ops->set_channel)
- return -EOPNOTSUPP;
chan = ieee80211_get_channel(&rdev->wiphy, freq);
/* Primary channel not allowed */
if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
- return -EINVAL;
+ return NULL;
if (channel_type == NL80211_CHAN_HT40MINUS &&
chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
- return -EINVAL;
+ return NULL;
else if (channel_type == NL80211_CHAN_HT40PLUS &&
chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
- return -EINVAL;
+ return NULL;
ht_cap = &rdev->wiphy.bands[chan->band]->ht_cap;
if (channel_type != NL80211_CHAN_NO_HT) {
if (!ht_cap->ht_supported)
- return -EINVAL;
+ return NULL;
if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) ||
ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT)
- return -EINVAL;
+ return NULL;
}
+ return chan;
+}
+
+int rdev_set_freq(struct cfg80211_registered_device *rdev,
+ struct wireless_dev *for_wdev,
+ int freq, enum nl80211_channel_type channel_type)
+{
+ struct ieee80211_channel *chan;
+ int result;
+
+ if (rdev_fixed_channel(rdev, for_wdev))
+ return -EBUSY;
+
+ if (!rdev->ops->set_channel)
+ return -EOPNOTSUPP;
+
+ chan = rdev_freq_to_chan(rdev, freq, channel_type);
+ if (!chan)
+ return -EINVAL;
+
result = rdev->ops->set_channel(&rdev->wiphy, chan, channel_type);
if (result)
return result;
diff --git a/net/wireless/core.h b/net/wireless/core.h
index 35b71212714..30ec95f05b5 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -374,6 +374,9 @@ void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
struct ieee80211_channel *
rdev_fixed_channel(struct cfg80211_registered_device *rdev,
struct wireless_dev *for_wdev);
+struct ieee80211_channel *
+rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
+ int freq, enum nl80211_channel_type channel_type);
int rdev_set_freq(struct cfg80211_registered_device *rdev,
struct wireless_dev *for_wdev,
int freq, enum nl80211_channel_type channel_type);
diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c
index acaeaa784d6..11f6469b3f9 100644
--- a/net/wireless/mlme.c
+++ b/net/wireless/mlme.c
@@ -680,3 +680,30 @@ void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
}
}
}
+
+void cfg80211_ready_on_channel(struct net_device *dev, u64 cookie,
+ struct ieee80211_channel *chan,
+ enum nl80211_channel_type channel_type,
+ unsigned int duration, gfp_t gfp)
+{
+ struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
+ struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
+
+ nl80211_send_remain_on_channel(rdev, dev, cookie, chan, channel_type,
+ duration, gfp);
+}
+EXPORT_SYMBOL(cfg80211_ready_on_channel);
+
+void cfg80211_remain_on_channel_expired(struct net_device *dev,
+ u64 cookie,
+ struct ieee80211_channel *chan,
+ enum nl80211_channel_type channel_type,
+ gfp_t gfp)
+{
+ struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
+ struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
+
+ nl80211_send_remain_on_channel_cancel(rdev, dev, cookie, chan,
+ channel_type, gfp);
+}
+EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 60f854377f9..ff857f10cb8 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -141,6 +141,8 @@ static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
[NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
[NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
.len = WLAN_PMKID_LEN },
+ [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
+ [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
};
/* policy for the attributes */
@@ -569,6 +571,7 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
CMD(set_pmksa, SET_PMKSA);
CMD(del_pmksa, DEL_PMKSA);
CMD(flush_pmksa, FLUSH_PMKSA);
+ CMD(remain_on_channel, REMAIN_ON_CHANNEL);
if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
i++;
NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
@@ -4283,6 +4286,143 @@ static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
}
+static int nl80211_remain_on_channel(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct cfg80211_registered_device *rdev;
+ struct net_device *dev;
+ struct ieee80211_channel *chan;
+ struct sk_buff *msg;
+ void *hdr;
+ u64 cookie;
+ enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
+ u32 freq, duration;
+ int err;
+
+ if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
+ !info->attrs[NL80211_ATTR_DURATION])
+ return -EINVAL;
+
+ duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
+
+ /*
+ * We should be on that channel for at least one jiffie,
+ * and more than 5 seconds seems excessive.
+ */
+ if (!duration || !msecs_to_jiffies(duration) || duration > 5000)
+ return -EINVAL;
+
+ rtnl_lock();
+
+ err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
+ if (err)
+ goto unlock_rtnl;
+
+ if (!rdev->ops->remain_on_channel) {
+ 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_REMAIN_ON_CHANNEL);
+
+ if (IS_ERR(hdr)) {
+ err = PTR_ERR(hdr);
+ goto free_msg;
+ }
+
+ err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
+ channel_type, duration, &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_cancel_remain_on_channel(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct cfg80211_registered_device *rdev;
+ struct net_device *dev;
+ u64 cookie;
+ int err;
+
+ if (!info->attrs[NL80211_ATTR_COOKIE])
+ return -EINVAL;
+
+ rtnl_lock();
+
+ err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
+ if (err)
+ goto unlock_rtnl;
+
+ if (!rdev->ops->cancel_remain_on_channel) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ if (!netif_running(dev)) {
+ err = -ENETDOWN;
+ goto out;
+ }
+
+ cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
+
+ err = rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
+
+ 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,
@@ -4545,8 +4685,20 @@ static struct genl_ops nl80211_ops[] = {
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
-
+ {
+ .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
+ .doit = nl80211_remain_on_channel,
+ .policy = nl80211_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
+ .doit = nl80211_cancel_remain_on_channel,
+ .policy = nl80211_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
};
+
static struct genl_multicast_group nl80211_mlme_mcgrp = {
.name = "mlme",
};
@@ -5134,6 +5286,70 @@ nla_put_failure:
nlmsg_free(msg);
}
+static void nl80211_send_remain_on_chan_event(
+ int cmd, struct cfg80211_registered_device *rdev,
+ struct net_device *netdev, u64 cookie,
+ struct ieee80211_channel *chan,
+ enum nl80211_channel_type channel_type,
+ unsigned int duration, 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, cmd);
+ 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_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
+ NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
+ NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
+
+ if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
+ NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
+
+ if (genlmsg_end(msg, hdr) < 0) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
+ nl80211_mlme_mcgrp.id, gfp);
+ return;
+
+ nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ nlmsg_free(msg);
+}
+
+void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
+ struct net_device *netdev, u64 cookie,
+ struct ieee80211_channel *chan,
+ enum nl80211_channel_type channel_type,
+ unsigned int duration, gfp_t gfp)
+{
+ nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
+ rdev, netdev, cookie, chan,
+ channel_type, duration, gfp);
+}
+
+void nl80211_send_remain_on_channel_cancel(
+ struct cfg80211_registered_device *rdev, struct net_device *netdev,
+ u64 cookie, struct ieee80211_channel *chan,
+ enum nl80211_channel_type channel_type, gfp_t gfp)
+{
+ nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
+ rdev, netdev, cookie, chan,
+ channel_type, 0, gfp);
+}
+
/* initialisation/exit functions */
int nl80211_init(void)
diff --git a/net/wireless/nl80211.h b/net/wireless/nl80211.h
index 44cc2a76a1b..a5e2de419b7 100644
--- a/net/wireless/nl80211.h
+++ b/net/wireless/nl80211.h
@@ -59,4 +59,15 @@ void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
struct net_device *netdev, const u8 *bssid,
gfp_t gfp);
+void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
+ struct net_device *netdev,
+ u64 cookie,
+ struct ieee80211_channel *chan,
+ enum nl80211_channel_type channel_type,
+ unsigned int duration, gfp_t gfp);
+void nl80211_send_remain_on_channel_cancel(
+ struct cfg80211_registered_device *rdev, struct net_device *netdev,
+ u64 cookie, struct ieee80211_channel *chan,
+ enum nl80211_channel_type channel_type, gfp_t gfp);
+
#endif /* __NET_WIRELESS_NL80211_H */
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-25 04:57:43 +0000