diff options
| author | Wen Gong | 2021-09-30 04:15:33 -0400 |
|---|---|---|
| committer | Johannes Berg | 2021-10-21 17:25:16 +0200 |
| commit | 97981d89a1d47942a2d7517631d2400b99fe3f93 (patch) | |
| tree | 37492dae2e3cd18b5cacc2d8dedf7448f3135561 /net/wireless | |
| parent | f2622138f9352a2be7a45dfe430c88bbfe6218d3 (diff) | |
cfg80211: separate get channel number from ies
Get channel number from ies is a common logic, so separate it to a new
function, which could also be used by lower driver.
Signed-off-by: Wen Gong <wgong@codeaurora.org>
Link: https://lore.kernel.org/r/20210930081533.4898-1-wgong@codeaurora.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless')
| -rw-r--r-- | net/wireless/scan.c | 41 |
1 files changed, 26 insertions, 15 deletions
diff --git a/net/wireless/scan.c b/net/wireless/scan.c index 0273f20291c4..e4f79b23f7f6 100644 --- a/net/wireless/scan.c +++ b/net/wireless/scan.c @@ -1791,25 +1791,13 @@ cfg80211_bss_update(struct cfg80211_registered_device *rdev, return NULL; } -/* - * Update RX channel information based on the available frame payload - * information. This is mainly for the 2.4 GHz band where frames can be received - * from neighboring channels and the Beacon frames use the DSSS Parameter Set - * element to indicate the current (transmitting) channel, but this might also - * be needed on other bands if RX frequency does not match with the actual - * operating channel of a BSS. - */ -static struct ieee80211_channel * -cfg80211_get_bss_channel(struct wiphy *wiphy, const u8 *ie, size_t ielen, - struct ieee80211_channel *channel, - enum nl80211_bss_scan_width scan_width) +int cfg80211_get_ies_channel_number(const u8 *ie, size_t ielen, + enum nl80211_band band) { const u8 *tmp; - u32 freq; int channel_number = -1; - struct ieee80211_channel *alt_channel; - if (channel->band == NL80211_BAND_S1GHZ) { + if (band == NL80211_BAND_S1GHZ) { tmp = cfg80211_find_ie(WLAN_EID_S1G_OPERATION, ie, ielen); if (tmp && tmp[1] >= sizeof(struct ieee80211_s1g_oper_ie)) { struct ieee80211_s1g_oper_ie *s1gop = (void *)(tmp + 2); @@ -1830,6 +1818,29 @@ cfg80211_get_bss_channel(struct wiphy *wiphy, const u8 *ie, size_t ielen, } } + return channel_number; +} +EXPORT_SYMBOL(cfg80211_get_ies_channel_number); + +/* + * Update RX channel information based on the available frame payload + * information. This is mainly for the 2.4 GHz band where frames can be received + * from neighboring channels and the Beacon frames use the DSSS Parameter Set + * element to indicate the current (transmitting) channel, but this might also + * be needed on other bands if RX frequency does not match with the actual + * operating channel of a BSS. + */ +static struct ieee80211_channel * +cfg80211_get_bss_channel(struct wiphy *wiphy, const u8 *ie, size_t ielen, + struct ieee80211_channel *channel, + enum nl80211_bss_scan_width scan_width) +{ + u32 freq; + int channel_number; + struct ieee80211_channel *alt_channel; + + channel_number = cfg80211_get_ies_channel_number(ie, ielen, channel->band); + if (channel_number < 0) { /* No channel information in frame payload */ return channel; |