Ian Lin <ian.lin@xxxxxxxxxxxx> writes:
> From: Syed Rafiuddeen <syed.rafiuddeen@xxxxxxxxxxx>
>
> cfg80211 layer on DUT STA is disconnecting ongoing connection attempt after
> receiving association response, because cfg80211 layer does not have valid
> AP bss information. On association response event, brcmfmac communicates
> the AP bss information to cfg80211 layer, but SSID seem to be empty in AP
> bss information, and cfg80211 layer prints kernel warning and then
> disconnects the ongoing connection attempt.
>
> SSID is empty in SSID IE, but 'bi->SSID' contains a valid SSID, so
> updating the SSID for hidden AP while informing its bss information
> to cfg80211 layer.
>
> Signed-off-by: Syed Rafiuddeen <syed.rafiuddeen@xxxxxxxxxxx>
> Signed-off-by: Chung-Hsien Hsu <chung-hsien.hsu@xxxxxxxxxxxx>
> Signed-off-by: Chi-hsien Lin <chi-hsien.lin@xxxxxxxxxxxx>
> Signed-off-by: Ian Lin <ian.lin@xxxxxxxxxxxx>
> ---
> .../net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
> index 6c37da42e61b..3560afe0ccfe 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
> @@ -3003,6 +3003,7 @@ static s32 brcmf_inform_single_bss(struct brcmf_cfg80211_info *cfg,
> u8 *notify_ie;
> size_t notify_ielen;
> struct cfg80211_inform_bss bss_data = {};
> + struct brcmf_tlv *ssid;
>
> if (le32_to_cpu(bi->length) > WL_BSS_INFO_MAX) {
> bphy_err(drvr, "Bss info is larger than buffer. Discarding\n");
> @@ -3032,6 +3033,13 @@ static s32 brcmf_inform_single_bss(struct brcmf_cfg80211_info *cfg,
> notify_ielen = le32_to_cpu(bi->ie_length);
> bss_data.signal = (s16)le16_to_cpu(bi->RSSI) * 100;
>
> + ssid = (struct brcmf_tlv *)
> + brcmf_parse_tlvs(notify_ie, notify_ielen, WLAN_EID_SSID);
This still casts away the const. For some reason brcmf_parse_tlvs()
takes a const buffer:
static const struct brcmf_tlv *brcmf_parse_tlvs(const void *buf, int buflen, uint key)
I'm not familiar with brcmfmac internal so I don't know why it does
that, but that means the buffer cannot be modified. If you need to
modify the ssid should you make a copy of it?
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