nl80211: send netdetect configuration info in NL80211_CMD_GET_WOWLAN

Send the netdetect configuration information in the response to
NL8021_CMD_GET_WOWLAN commands.  This includes the scan interval,
SSIDs to match and frequencies to scan.

Additionally, add the NL80211_WOWLAN_TRIG_NET_DETECT with
NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index a963d48..b6c1a00 100644 (file)
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -3734,7 +3734,9 @@ struct nl80211_pattern_support {
  *     same attributes used with @NL80211_CMD_START_SCHED_SCAN.  It
  *     specifies how the scan is performed (e.g. the interval and the
  *     channels to scan) as well as the scan results that will
- *     trigger a wake (i.e. the matchsets).
+ *     trigger a wake (i.e. the matchsets).  This attribute is also
+ *     sent in a response to @NL80211_CMD_GET_WIPHY, indicating the
+ *     number of match sets supported by the driver (u32).
  * @NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS: nested attribute
  *     containing an array with information about what triggered the
  *     wake up.  If no elements are present in the array, it means

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 7c2ce26..3807843 100644 (file)
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -1088,6 +1088,11 @@ static int nl80211_send_wowlan(struct sk_buff *msg,
                        return -ENOBUFS;
        }
 
+       if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
+           nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
+                       rdev->wiphy.wowlan->max_nd_match_sets))
+               return -ENOBUFS;
+
        if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
                return -ENOBUFS;
 
@@ -8747,6 +8752,48 @@ static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
        return 0;
 }
 
+static int nl80211_send_wowlan_nd(struct sk_buff *msg,
+                                 struct cfg80211_sched_scan_request *req)
+{
+       struct nlattr *nd, *freqs, *matches, *match;
+       int i;
+
+       if (!req)
+               return 0;
+
+       nd = nla_nest_start(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
+       if (!nd)
+               return -ENOBUFS;
+
+       if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL, req->interval))
+               return -ENOBUFS;
+
+       freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
+       if (!freqs)
+               return -ENOBUFS;
+
+       for (i = 0; i < req->n_channels; i++)
+               nla_put_u32(msg, i, req->channels[i]->center_freq);
+
+       nla_nest_end(msg, freqs);
+
+       if (req->n_match_sets) {
+               matches = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
+               for (i = 0; i < req->n_match_sets; i++) {
+                       match = nla_nest_start(msg, i);
+                       nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
+                               req->match_sets[i].ssid.ssid_len,
+                               req->match_sets[i].ssid.ssid);
+                       nla_nest_end(msg, match);
+               }
+               nla_nest_end(msg, matches);
+       }
+
+       nla_nest_end(msg, nd);
+
+       return 0;
+}
+
 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
 {
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
@@ -8804,6 +8851,11 @@ static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
                                            rdev->wiphy.wowlan_config->tcp))
                        goto nla_put_failure;
 
+               if (nl80211_send_wowlan_nd(
+                           msg,
+                           rdev->wiphy.wowlan_config->nd_config))
+                       goto nla_put_failure;
+
                nla_nest_end(msg, nl_wowlan);
        }