From ed47377154310fd2fd59d75fcdeb3d022344fb31 Mon Sep 17 00:00:00 2001 From: Sam Leffler Date: Thu, 11 Oct 2012 21:03:31 -0700 Subject: {nl,cfg}80211: add a flags word to scan requests Add a flags word to direct and scheduled scan requests; it will be used for control of optional behaviours such as flushing the bss cache prior to doing a scan. Signed-off-by: Sam Leffler Tested-by: Amitkumar Karwar Signed-off-by: Amitkumar Karwar Signed-off-by: Bing Zhao Signed-off-by: Johannes Berg --- include/net/cfg80211.h | 4 ++++ include/uapi/linux/nl80211.h | 15 +++++++++++++++ net/wireless/nl80211.c | 12 ++++++++++++ 3 files changed, 31 insertions(+) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 607b5c02f74..d95da8f55f6 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -1002,6 +1002,7 @@ struct cfg80211_ssid { * @n_channels: total number of channels to scan * @ie: optional information element(s) to add into Probe Request or %NULL * @ie_len: length of ie in octets + * @flags: bit field of flags controlling operation * @rates: bitmap of rates to advertise for each band * @wiphy: the wiphy this was for * @wdev: the wireless device to scan for @@ -1014,6 +1015,7 @@ struct cfg80211_scan_request { u32 n_channels; const u8 *ie; size_t ie_len; + u32 flags; u32 rates[IEEE80211_NUM_BANDS]; @@ -1046,6 +1048,7 @@ struct cfg80211_match_set { * @interval: interval between each scheduled scan cycle * @ie: optional information element(s) to add into Probe Request or %NULL * @ie_len: length of ie in octets + * @flags: bit field of flags controlling operation * @match_sets: sets of parameters to be matched for a scan result * entry to be considered valid and to be passed to the host * (others are filtered out). @@ -1063,6 +1066,7 @@ struct cfg80211_sched_scan_request { u32 interval; const u8 *ie; size_t ie_len; + u32 flags; struct cfg80211_match_set *match_sets; int n_match_sets; s32 rssi_thold; diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index 71ab23b0356..4d0b49ee4c2 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -1279,6 +1279,8 @@ enum nl80211_commands { * @NL80211_ATTR_VHT_CAPABILITY: VHT Capability information element (from * association request when used with NL80211_CMD_NEW_STATION) * + * @NL80211_ATTR_SCAN_FLAGS: scan request control flags (u32) + * * @NL80211_ATTR_MAX: highest attribute number currently defined * @__NL80211_ATTR_AFTER_LAST: internal use */ @@ -1540,6 +1542,8 @@ enum nl80211_attrs { NL80211_ATTR_VHT_CAPABILITY, + NL80211_ATTR_SCAN_FLAGS, + /* add attributes here, update the policy in nl80211.c */ __NL80211_ATTR_AFTER_LAST, @@ -3086,4 +3090,15 @@ enum nl80211_connect_failed_reason { NL80211_CONN_FAIL_BLOCKED_CLIENT, }; +/** + * enum nl80211_scan_flags - scan request control flags + * + * Scan request control flags are used to control the handling + * of NL80211_CMD_TRIGGER_SCAN and NL80211_CMD_START_SCHED_SCAN + * requests. + * (will be filled) +enum nl80211_scan_flags { +}; + */ + #endif /* __LINUX_NL80211_H */ diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index ef170e982f9..dc08211c6c6 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -356,6 +356,7 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = { [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 }, [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, }, [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN }, + [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 }, }; /* policy for the key attributes */ @@ -4367,6 +4368,10 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info) } } + if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) + request->flags = nla_get_u32( + info->attrs[NL80211_ATTR_SCAN_FLAGS]); + request->no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]); @@ -4598,6 +4603,10 @@ static int nl80211_start_sched_scan(struct sk_buff *skb, request->ie_len); } + if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) + request->flags = nla_get_u32( + info->attrs[NL80211_ATTR_SCAN_FLAGS]); + request->dev = dev; request->wiphy = &rdev->wiphy; request->interval = interval; @@ -7663,6 +7672,9 @@ static int nl80211_add_scan_req(struct sk_buff *msg, nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie)) goto nla_put_failure; + if (req->flags) + nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags); + return 0; nla_put_failure: return -ENOBUFS; -- cgit v1.2.3