From: Thomas Pedersen <thomas@adapt-ip.com>
To: Johannes Berg <johannes@sipsolutions.net>
Cc: linux-wireless <linux-wireless@vger.kernel.org>,
Thomas Pedersen <thomas@adapt-ip.com>
Subject: [PATCH 6/9] nl80211: add KHz frequency offset for most wifi commands
Date: Wed, 1 Apr 2020 18:18:07 -0700 [thread overview]
Message-ID: <20200402011810.22947-7-thomas@adapt-ip.com> (raw)
In-Reply-To: <20200402011810.22947-1-thomas@adapt-ip.com>
cfg80211 recently gained the ability to understand a
frequency offset component in KHz. Expose this in nl80211
through the new attributes NL80211_ATTR_WIPHY_FREQ_OFFSET,
NL80211_FREQUENCY_ATTR_OFFSET,
NL80211_ATTR_CENTER_FREQ1_OFFSET, and
NL80211_BSS_FREQUENCY_OFFSET.
These add support to send and receive a KHz offset
component with the following NL80211 commands:
- NL80211_CMD_FRAME
- NL80211_CMD_GET_SCAN
- NL80211_CMD_AUTHENTICATE
- NL80211_CMD_ASSOCIATE
- NL80211_CMD_CONNECT
Along with any other command which takes a chandef, ie:
- NL80211_CMD_SET_CHANNEL
- NL80211_CMD_SET_WIPHY
- NL80211_CMD_START_AP
- NL80211_CMD_RADAR_DETECT
- NL80211_CMD_NOTIFY_RADAR
- NL80211_CMD_CHANNEL_SWITCH
- NL80211_JOIN_IBSS
- NL80211_CMD_REMAIN_ON_CHANNEL
- NL80211_CMD_JOIN_OCB
- NL80211_CMD_JOIN_MESH
- NL80211_CMD_TDLS_CHANNEL_SWITCH
If the driver advertises a band containing channels with
frequency offset, it must also verify support for
frequency offset channels in its cfg80211 ops, or return
an error.
Signed-off-by: Thomas Pedersen <thomas@adapt-ip.com>
---
v2:
use NLA_POLICY_RANGE for the freq offsets (Johannes)
---
include/uapi/linux/nl80211.h | 49 ++++++++++++++++--------
net/wireless/nl80211.c | 73 ++++++++++++++++++++++++++----------
2 files changed, 87 insertions(+), 35 deletions(-)
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 2b691161830f..28401f039d75 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -296,13 +296,14 @@
* to get a list of all present wiphys.
* @NL80211_CMD_SET_WIPHY: set wiphy parameters, needs %NL80211_ATTR_WIPHY or
* %NL80211_ATTR_IFINDEX; can be used to set %NL80211_ATTR_WIPHY_NAME,
- * %NL80211_ATTR_WIPHY_TXQ_PARAMS, %NL80211_ATTR_WIPHY_FREQ (and the
- * attributes determining the channel width; this is used for setting
- * monitor mode channel), %NL80211_ATTR_WIPHY_RETRY_SHORT,
- * %NL80211_ATTR_WIPHY_RETRY_LONG, %NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
- * and/or %NL80211_ATTR_WIPHY_RTS_THRESHOLD.
- * However, for setting the channel, see %NL80211_CMD_SET_CHANNEL
- * instead, the support here is for backward compatibility only.
+ * %NL80211_ATTR_WIPHY_TXQ_PARAMS, %NL80211_ATTR_WIPHY_FREQ,
+ * %NL80211_ATTR_WIPHY_FREQ_OFFSET (and the attributes determining the
+ * channel width; this is used for setting monitor mode channel),
+ * %NL80211_ATTR_WIPHY_RETRY_SHORT, %NL80211_ATTR_WIPHY_RETRY_LONG,
+ * %NL80211_ATTR_WIPHY_FRAG_THRESHOLD, and/or
+ * %NL80211_ATTR_WIPHY_RTS_THRESHOLD. However, for setting the channel,
+ * see %NL80211_CMD_SET_CHANNEL instead, the support here is for backward
+ * compatibility only.
* @NL80211_CMD_NEW_WIPHY: Newly created wiphy, response to get request
* or rename notification. Has attributes %NL80211_ATTR_WIPHY and
* %NL80211_ATTR_WIPHY_NAME.
@@ -351,7 +352,8 @@
* %NL80211_ATTR_AUTH_TYPE, %NL80211_ATTR_INACTIVITY_TIMEOUT,
* %NL80211_ATTR_ACL_POLICY and %NL80211_ATTR_MAC_ADDRS.
* The channel to use can be set on the interface or be given using the
- * %NL80211_ATTR_WIPHY_FREQ and the attributes determining channel width.
+ * %NL80211_ATTR_WIPHY_FREQ and %NL80211_ATTR_WIPHY_FREQ_OFFSET, and the
+ * attributes determining channel width.
* @NL80211_CMD_NEW_BEACON: old alias for %NL80211_CMD_START_AP
* @NL80211_CMD_STOP_AP: Stop AP operation on the given interface
* @NL80211_CMD_DEL_BEACON: old alias for %NL80211_CMD_STOP_AP
@@ -536,11 +538,12 @@
* interface. %NL80211_ATTR_MAC is used to specify PeerSTAAddress (and
* BSSID in case of station mode). %NL80211_ATTR_SSID is used to specify
* the SSID (mainly for association, but is included in authentication
- * request, too, to help BSS selection. %NL80211_ATTR_WIPHY_FREQ is used
- * to specify the frequence of the channel in MHz. %NL80211_ATTR_AUTH_TYPE
- * is used to specify the authentication type. %NL80211_ATTR_IE is used to
- * define IEs (VendorSpecificInfo, but also including RSN IE and FT IEs)
- * to be added to the frame.
+ * request, too, to help BSS selection. %NL80211_ATTR_WIPHY_FREQ +
+ * %NL80211_ATTR_WIPHY_FREQ_OFFSET is used to specify the frequence of the
+ * channel in MHz. %NL80211_ATTR_AUTH_TYPE is used to specify the
+ * authentication type. %NL80211_ATTR_IE is used to define IEs
+ * (VendorSpecificInfo, but also including RSN IE and FT IEs) to be added
+ * to the frame.
* When used as an event, this reports reception of an Authentication
* frame in station and IBSS modes when the local MLME processed the
* frame, i.e., it was for the local STA and was received in correct
@@ -595,8 +598,9 @@
* requests to connect to a specified network but without separating
* auth and assoc steps. For this, you need to specify the SSID in a
* %NL80211_ATTR_SSID attribute, and can optionally specify the association
- * IEs in %NL80211_ATTR_IE, %NL80211_ATTR_AUTH_TYPE, %NL80211_ATTR_USE_MFP,
- * %NL80211_ATTR_MAC, %NL80211_ATTR_WIPHY_FREQ, %NL80211_ATTR_CONTROL_PORT,
+ * IEs in %NL80211_ATTR_IE, %NL80211_ATTR_AUTH_TYPE,
+ * %NL80211_ATTR_USE_MFP, %NL80211_ATTR_MAC, %NL80211_ATTR_WIPHY_FREQ,
+ * %NL80211_ATTR_WIPHY_FREQ_OFFSET, %NL80211_ATTR_CONTROL_PORT,
* %NL80211_ATTR_CONTROL_PORT_ETHERTYPE,
* %NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT,
* %NL80211_ATTR_CONTROL_PORT_OVER_NL80211, %NL80211_ATTR_MAC_HINT, and
@@ -1422,7 +1426,8 @@ enum nl80211_commands {
* of &enum nl80211_chan_width, describing the channel width. See the
* documentation of the enum for more information.
* @NL80211_ATTR_CENTER_FREQ1: Center frequency of the first part of the
- * channel, used for anything but 20 MHz bandwidth
+ * channel, used for anything but 20 MHz bandwidth. In S1G this is the
+ * operating channel center frequency.
* @NL80211_ATTR_CENTER_FREQ2: Center frequency of the second part of the
* channel, used only for 80+80 MHz bandwidth
* @NL80211_ATTR_WIPHY_CHANNEL_TYPE: included with NL80211_ATTR_WIPHY_FREQ
@@ -2469,6 +2474,11 @@ enum nl80211_commands {
* entry without having to force a disconnection after the PMK timeout. If
* no roaming occurs between the reauth threshold and PMK expiration,
* disassociation is still forced.
+ * @NL80211_ATTR_WIPHY_FREQ_OFFSET: offset of the associated
+ * %NL80211_ATTR_WIPHY_FREQ in positive KHz. Only valid when supplied with
+ * an %NL80211_ATTR_WIPHY_FREQ_OFFSET.
+ * @NL80211_ATTR_CENTER_FREQ1_OFFSET: Center frequency offset in KHz for the
+ * first channel segment specified in %NL80211_ATTR_CENTER_FREQ1.
*
* @NUM_NL80211_ATTR: total number of nl80211_attrs available
* @NL80211_ATTR_MAX: highest attribute number currently defined
@@ -2945,6 +2955,9 @@ enum nl80211_attrs {
NL80211_ATTR_PMK_LIFETIME,
NL80211_ATTR_PMK_REAUTH_THRESHOLD,
+ NL80211_ATTR_WIPHY_FREQ_OFFSET,
+ NL80211_ATTR_CENTER_FREQ1_OFFSET,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
@@ -3666,6 +3679,7 @@ enum nl80211_wmm_rule {
* (see &enum nl80211_wmm_rule)
* @NL80211_FREQUENCY_ATTR_NO_HE: HE operation is not allowed on this channel
* in current regulatory domain.
+ * @NL80211_FREQUENCY_ATTR_OFFSET: frequency offset in KHz
* @NL80211_FREQUENCY_ATTR_MAX: highest frequency attribute number
* currently defined
* @__NL80211_FREQUENCY_ATTR_AFTER_LAST: internal use
@@ -3696,6 +3710,7 @@ enum nl80211_frequency_attr {
NL80211_FREQUENCY_ATTR_NO_10MHZ,
NL80211_FREQUENCY_ATTR_WMM,
NL80211_FREQUENCY_ATTR_NO_HE,
+ NL80211_FREQUENCY_ATTR_OFFSET,
/* keep last */
__NL80211_FREQUENCY_ATTR_AFTER_LAST,
@@ -4466,6 +4481,7 @@ enum nl80211_bss_scan_width {
* @NL80211_BSS_CHAIN_SIGNAL: per-chain signal strength of last BSS update.
* Contains a nested array of signal strength attributes (u8, dBm),
* using the nesting index as the antenna number.
+ * @NL80211_BSS_FREQUENCY_OFFSET: frequency offset in KHz
* @__NL80211_BSS_AFTER_LAST: internal
* @NL80211_BSS_MAX: highest BSS attribute
*/
@@ -4490,6 +4506,7 @@ enum nl80211_bss {
NL80211_BSS_PARENT_TSF,
NL80211_BSS_PARENT_BSSID,
NL80211_BSS_CHAIN_SIGNAL,
+ NL80211_BSS_FREQUENCY_OFFSET,
/* keep last */
__NL80211_BSS_AFTER_LAST,
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 6ff2130f33ff..b1226401757a 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -365,6 +365,7 @@ const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
[NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
[NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
+ [NL80211_ATTR_CENTER_FREQ1_OFFSET] = NLA_POLICY_RANGE(NLA_U32, 0, 999),
[NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
[NL80211_ATTR_WIPHY_RETRY_SHORT] = NLA_POLICY_MIN(NLA_U8, 1),
@@ -663,6 +664,7 @@ const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
[NL80211_ATTR_CONTROL_PORT_NO_PREAUTH] = { .type = NLA_FLAG },
[NL80211_ATTR_PMK_LIFETIME] = NLA_POLICY_MIN(NLA_U32, 1),
[NL80211_ATTR_PMK_REAUTH_THRESHOLD] = NLA_POLICY_RANGE(NLA_U8, 1, 100),
+ [NL80211_ATTR_WIPHY_FREQ_OFFSET] = NLA_POLICY_RANGE(NLA_U32, 0, 999),
};
/* policy for the key attributes */
@@ -947,6 +949,9 @@ static int nl80211_msg_put_channel(struct sk_buff *msg, struct wiphy *wiphy,
chan->center_freq))
goto nla_put_failure;
+ if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_OFFSET, chan->freq_offset))
+ goto nla_put_failure;
+
if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
goto nla_put_failure;
@@ -1352,13 +1357,11 @@ static int nl80211_key_allowed(struct wireless_dev *wdev)
}
static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
- struct nlattr *tb)
+ u32 freq)
{
struct ieee80211_channel *chan;
- if (tb == NULL)
- return NULL;
- chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
+ chan = ieee80211_get_channel_khz(wiphy, freq);
if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
return NULL;
return chan;
@@ -2813,13 +2816,17 @@ int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
if (!attrs[NL80211_ATTR_WIPHY_FREQ])
return -EINVAL;
- control_freq = nla_get_u32(attrs[NL80211_ATTR_WIPHY_FREQ]);
+ control_freq = MHZ_TO_KHZ(
+ nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
+ if (info->attrs[NL80211_ATTR_WIPHY_FREQ_OFFSET])
+ control_freq +=
+ nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ_OFFSET]);
memset(chandef, 0, sizeof(*chandef));
-
- chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
+ chandef->chan = ieee80211_get_channel_khz(&rdev->wiphy, control_freq);
chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
- chandef->center_freq1 = control_freq;
+ chandef->center_freq1 = KHZ_TO_MHZ(control_freq);
+ chandef->freq1_offset = control_freq % 1000;
chandef->center_freq2 = 0;
/* Primary channel not allowed */
@@ -2870,6 +2877,9 @@ int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
if (attrs[NL80211_ATTR_CENTER_FREQ1])
chandef->center_freq1 =
nla_get_u32(attrs[NL80211_ATTR_CENTER_FREQ1]);
+ if (attrs[NL80211_ATTR_CENTER_FREQ1_OFFSET])
+ chandef->freq1_offset = nla_get_u32(
+ attrs[NL80211_ATTR_CENTER_FREQ1_OFFSET]);
if (attrs[NL80211_ATTR_CENTER_FREQ2])
chandef->center_freq2 =
nla_get_u32(attrs[NL80211_ATTR_CENTER_FREQ2]);
@@ -3302,6 +3312,9 @@ static int nl80211_send_chandef(struct sk_buff *msg,
if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
chandef->chan->center_freq))
return -ENOBUFS;
+ if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ_OFFSET,
+ chandef->chan->freq_offset))
+ return -ENOBUFS;
switch (chandef->width) {
case NL80211_CHAN_WIDTH_20_NOHT:
case NL80211_CHAN_WIDTH_20:
@@ -8906,6 +8919,8 @@ static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
goto nla_put_failure;
if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
+ nla_put_u32(msg, NL80211_BSS_FREQUENCY_OFFSET,
+ res->channel->freq_offset) ||
nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
jiffies_to_msecs(jiffies - intbss->ts)))
@@ -9174,6 +9189,7 @@ static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
enum nl80211_auth_type auth_type;
struct key_parse key;
bool local_state_change;
+ u32 freq;
if (!info->attrs[NL80211_ATTR_MAC])
return -EINVAL;
@@ -9230,8 +9246,12 @@ static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
return -EOPNOTSUPP;
bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
- chan = nl80211_get_valid_chan(&rdev->wiphy,
- info->attrs[NL80211_ATTR_WIPHY_FREQ]);
+ freq = MHZ_TO_KHZ(nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
+ if (info->attrs[NL80211_ATTR_WIPHY_FREQ_OFFSET])
+ freq +=
+ nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ_OFFSET]);
+
+ chan = nl80211_get_valid_chan(&rdev->wiphy, freq);
if (!chan)
return -EINVAL;
@@ -9421,6 +9441,7 @@ static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
struct cfg80211_assoc_request req = {};
const u8 *bssid, *ssid;
int err, ssid_len = 0;
+ u32 freq;
if (dev->ieee80211_ptr->conn_owner_nlportid &&
dev->ieee80211_ptr->conn_owner_nlportid != info->snd_portid)
@@ -9440,8 +9461,11 @@ static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
- chan = nl80211_get_valid_chan(&rdev->wiphy,
- info->attrs[NL80211_ATTR_WIPHY_FREQ]);
+ freq = MHZ_TO_KHZ(nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
+ if (info->attrs[NL80211_ATTR_WIPHY_FREQ_OFFSET])
+ freq +=
+ nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ_OFFSET]);
+ chan = nl80211_get_valid_chan(&rdev->wiphy, freq);
if (!chan)
return -EINVAL;
@@ -10121,6 +10145,7 @@ static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
struct cfg80211_connect_params connect;
struct wiphy *wiphy;
struct cfg80211_cached_keys *connkeys = NULL;
+ u32 freq = 0;
int err;
memset(&connect, 0, sizeof(connect));
@@ -10191,14 +10216,21 @@ static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
connect.prev_bssid =
nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
- if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
- connect.channel = nl80211_get_valid_chan(
- wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
+ if (info->attrs[NL80211_ATTR_WIPHY_FREQ])
+ freq = MHZ_TO_KHZ(nla_get_u32(
+ info->attrs[NL80211_ATTR_WIPHY_FREQ]));
+ if (info->attrs[NL80211_ATTR_WIPHY_FREQ_OFFSET])
+ freq +=
+ nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ_OFFSET]);
+
+ if (freq) {
+ connect.channel = nl80211_get_valid_chan(wiphy, freq);
if (!connect.channel)
return -EINVAL;
} else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
- connect.channel_hint = nl80211_get_valid_chan(
- wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
+ freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
+ freq = MHZ_TO_KHZ(freq);
+ connect.channel_hint = nl80211_get_valid_chan(wiphy, freq);
if (!connect.channel_hint)
return -EINVAL;
}
@@ -16227,6 +16259,7 @@ int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
NL80211_ATTR_PAD) ||
nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, KHZ_TO_MHZ(freq)) ||
+ nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ_OFFSET, freq % 1000) ||
(sig_dbm &&
nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
@@ -16877,8 +16910,10 @@ void cfg80211_report_obss_beacon(struct wiphy *wiphy,
if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
(freq &&
- nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
- KHZ_TO_MHZ(freq))) ||
+ (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
+ KHZ_TO_MHZ(freq)) ||
+ nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ_OFFSET,
+ freq % 1000))) ||
(sig_dbm &&
nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
nla_put(msg, NL80211_ATTR_FRAME, len, frame))
--
2.20.1
next prev parent reply other threads:[~2020-04-02 1:18 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-02 1:18 [PATCH 0/9] initial support for S1G channels Thomas Pedersen
2020-04-02 1:18 ` [PATCH 1/9] ieee80211: share 802.11 unit conversion helpers Thomas Pedersen
2020-04-02 1:18 ` [PATCH 2/9] cfg80211: express channels with a KHz component Thomas Pedersen
2020-04-02 1:18 ` [PATCH 3/9] mac80211: handle channel frequency offset Thomas Pedersen
2020-04-02 1:18 ` [PATCH 4/9] mac80211: add freq_offset to RX status Thomas Pedersen
2020-04-02 1:18 ` [PATCH 5/9] cfg80211: report frequency in KHz for management RX Thomas Pedersen
2020-04-24 10:11 ` Johannes Berg
2020-04-02 1:18 ` Thomas Pedersen [this message]
2020-04-02 1:18 ` [PATCH 7/9] nl80211: accept scan frequencies in KHz Thomas Pedersen
2020-04-02 1:18 ` [PATCH 8/9] ieee80211: S1G defines Thomas Pedersen
2020-04-02 1:18 ` [PATCH 9/9] nl80211: S1G band and channel definitions Thomas Pedersen
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