This allows us to send to userspace "regulatory" events.
For now we just send an event when we change regulatory domains.
Signed-off-by: Luis R. Rodriguez <lrodriguez@xxxxxxxxxxx>
---
include/linux/nl80211.h | 20 ++++++++++++++++++++
net/wireless/nl80211.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
net/wireless/nl80211.h | 5 +++++
net/wireless/reg.c | 13 ++++++++++++-
4 files changed, 83 insertions(+), 1 deletions(-)
diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 989be40..6cf2048 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -166,6 +166,14 @@
* NL80211_ATTR_FRAME contains the management frame (including both the
* header and frame body, but not FCS).
*
+ * @NL80211_CMD_REG_CHANGE: indicates to userspace the regulatory domain
+ * has been changed and provides details of the request information
+ * that caused the change such as who initiated the regulatory request,
+ * to what country, if a device requested the change which one was it,
+ * if a country IE initiated the request a checksum of that country IE
+ * along with its capability environment and also if the regulatory
+ * domain is the product of an intersection.
+ *
* @NL80211_CMD_MAX: highest used command number
* @__NL80211_CMD_AFTER_LAST: internal use
*/
@@ -223,6 +231,8 @@ enum nl80211_commands {
NL80211_CMD_RX_AUTH,
NL80211_CMD_RX_ASSOC,
+ NL80211_CMD_REG_CHANGE,
+
/* add new commands above here */
/* used to define NL80211_CMD_MAX below */
@@ -352,6 +362,13 @@ enum nl80211_commands {
* and body, but not FCS; used, e.g., with NL80211_CMD_RX_AUTH and
* NL80211_CMD_RX_ASSOC events
*
+ * @NL80211_ATTR_REG_INITIATOR: indicates who requested the regulatory domain
+ * currently in effect. This could be any of the %NL80211_REGDOM_SET_BY_*
+ * @NL80211_ATTR_REG_INTERSECT: indicates whether or not the current regulatory
+ * domain is the product of an interesection between two regulatory
+ * domains. This is a boolean value so if this is set it means it was
+ * the product of an intersection.
+ *
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
*/
@@ -428,6 +445,9 @@ enum nl80211_attrs {
NL80211_ATTR_FRAME,
+ NL80211_ATTR_REG_INITIATOR,
+ NL80211_ATTR_REG_INTERSECT,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index fcbe4b2..e4c15fd 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -2710,6 +2710,9 @@ static struct genl_multicast_group nl80211_scan_mcgrp = {
static struct genl_multicast_group nl80211_mlme_mcgrp = {
.name = "mlme",
};
+static struct genl_multicast_group nl80211_regulatory_mcgrp = {
+ .name = "regulatory",
+};
/* notification functions */
@@ -2836,6 +2839,45 @@ void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
nl80211_send_mlme_event(rdev, netdev, skb, NL80211_CMD_RX_ASSOC);
}
+void nl80211_send_reg_change_event(struct regulatory_request *request)
+{
+ struct sk_buff *msg;
+ void *hdr;
+
+ msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!msg)
+ return;
+
+ hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
+ if (!hdr) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ /* Userspace can count on these two always being set */
+ NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
+ NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
+
+ if (wiphy_idx_valid(request->wiphy_idx))
+ NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
+
+ if (request->intersect)
+ NLA_PUT_U8(msg, NL80211_ATTR_REG_INTERSECT, 1);
+
+ if (genlmsg_end(msg, hdr) < 0) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ genlmsg_multicast(msg, 0, nl80211_regulatory_mcgrp.id, GFP_KERNEL);
+
+ return;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ nlmsg_free(msg);
+}
+
/* initialisation/exit functions */
int nl80211_init(void)
@@ -2864,6 +2906,10 @@ int nl80211_init(void)
if (err)
goto err_out;
+ err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
+ if (err)
+ goto err_out;
+
return 0;
err_out:
genl_unregister_family(&nl80211_fam);
diff --git a/net/wireless/nl80211.h b/net/wireless/nl80211.h
index 6179c2b..9073109 100644
--- a/net/wireless/nl80211.h
+++ b/net/wireless/nl80211.h
@@ -17,6 +17,7 @@ extern void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
extern void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
struct net_device *netdev,
struct sk_buff *skb);
+extern void nl80211_send_reg_change_event(struct regulatory_request *request);
#else
static inline int nl80211_init(void)
{
@@ -47,6 +48,10 @@ nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
struct net_device *netdev, struct sk_buff *skb)
{
}
+static inline void
+nl80211_send_reg_change_event(struct regulatory_request *request)
+{
+}
#endif /* CONFIG_NL80211 */
#endif /* __NET_WIRELESS_NL80211_H */
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index c40e99e..b110ef4 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -41,6 +41,7 @@
#include <net/cfg80211.h>
#include "core.h"
#include "reg.h"
+#include "nl80211.h"
/* Receipt of information from last regulatory request */
static struct regulatory_request *last_request;
@@ -1391,8 +1392,16 @@ new_request:
pending_request = NULL;
/* When r == REG_INTERSECT we do need to call CRDA */
- if (r < 0)
+ if (r < 0) {
+ /*
+ * Since CRDA will not be called in this case as we already
+ * have applied the requested regulatory domain before we just
+ * inform userspace we have processed the request
+ */
+ if (r == -EALREADY)
+ nl80211_send_reg_change_event(last_request);
return r;
+ }
/*
* Note: When CONFIG_WIRELESS_OLD_REGULATORY is enabled
@@ -2072,6 +2081,8 @@ int set_regdom(const struct ieee80211_regdomain *rd)
print_regdomain(cfg80211_regdomain);
+ nl80211_send_reg_change_event(last_request);
+
return r;
}
--
1.6.0.3
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