This patch adds the cqm option to iw allowing enabling/disabling the
rssi connection quality monitoring mode, and configuring rssi threshold and
hysteresis.
Signed-off-by: Juuso Oikarinen <juuso.oikarinen@xxxxxxxxx>
---
Makefile | 2 +-
cqm.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
event.c | 33 +++++++++++++++++++++++++++++++++
nl80211.h | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 138 insertions(+), 1 deletions(-)
create mode 100644 cqm.c
diff --git a/Makefile b/Makefile
index c51706b..e21900a 100644
--- a/Makefile
+++ b/Makefile
@@ -17,7 +17,7 @@ CFLAGS += -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
OBJS = iw.o genl.o event.o info.o phy.o \
interface.o ibss.o station.o survey.o util.o \
mesh.o mpath.o scan.o reg.o version.o \
- reason.o status.o connect.o link.o offch.o ps.o
+ reason.o status.o connect.o link.o offch.o ps.o cqm.c
OBJS += sections.o
ALL = iw
diff --git a/cqm.c b/cqm.c
new file mode 100644
index 0000000..3da2b54
--- /dev/null
+++ b/cqm.c
@@ -0,0 +1,54 @@
+#include <errno.h>
+
+#include <netlink/genl/genl.h>
+#include <netlink/genl/family.h>
+#include <netlink/genl/ctrl.h>
+#include <netlink/msg.h>
+#include <netlink/attr.h>
+
+#include "nl80211.h"
+#include "iw.h"
+
+static int iw_cqm_rssi(struct nl80211_state *state, struct nl_cb *cb,
+ struct nl_msg *msg, int argc, char **argv)
+{
+ struct nl_msg *cqm = NULL;
+ int thold = 0;
+ int hyst = 0;
+ int ret = -ENOSPC;
+
+ /* get the required args */
+ if (argc < 1 || argc > 2)
+ return 1;
+
+ if (strcmp(argv[0], "off")) {
+ thold = atoi(argv[0]);
+
+ if (thold == 0)
+ return -EINVAL;
+
+ if (argc == 2)
+ hyst = atoi(argv[1]);
+ }
+
+ /* connection quality monitor attributes */
+ cqm = nlmsg_alloc();
+
+ NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_THOLD, thold);
+ NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_HYST, hyst);
+
+ nla_put_nested(msg, NL80211_ATTR_CQM, cqm);
+ ret = 0;
+
+ nla_put_failure:
+ nlmsg_free(cqm);
+ return ret;
+}
+
+TOPLEVEL(cqm, "",
+ 0, 0, CIB_NETDEV, NULL,
+ "Configure the WLAN connection quality monitor.\n");
+
+COMMAND(cqm, rssi, "<threshold|off> [<hysteresis>]",
+ NL80211_CMD_SET_CQM, 0, CIB_NETDEV, iw_cqm_rssi,
+ "Set connection quality monitor RSSI threshold.\n");
diff --git a/event.c b/event.c
index 01a325c..0fae9a3 100644
--- a/event.c
+++ b/event.c
@@ -100,6 +100,36 @@ static void print_frame(struct print_event_args *args, struct nlattr *attr)
printf("]");
}
+static void parse_cqm(struct nlattr *tb) {
+ static struct nla_policy cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
+ [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
+ [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U8 },
+ [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
+ };
+ struct nlattr *cqm[NL80211_FREQUENCY_ATTR_MAX + 1];
+
+ printf("connection quality monitor event: ");
+
+ if (nla_parse_nested(cqm,
+ NL80211_FREQUENCY_ATTR_MAX,
+ tb,
+ cqm_policy)) {
+ printf("none!\n");
+ return;
+ }
+
+ if (cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]) {
+ enum nl80211_cqm_rssi_threshold_event rssi_event;
+ rssi_event = nla_get_u32(cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]);
+ if (rssi_event == NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH)
+ printf("RSSI high: ");
+ else
+ printf("RSSI low: ");
+ }
+ printf("\n");
+}
+
+
static int print_event(struct nl_msg *msg, void *arg)
{
#define PARSE_BEACON_CHAN(_attr, _chan) do { \
@@ -313,6 +343,9 @@ static int print_event(struct nl_msg *msg, void *arg)
nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]),
(unsigned long long)nla_get_u64(tb[NL80211_ATTR_COOKIE]));
break;
+ case NL80211_CMD_NOTIFY_CQM:
+ parse_cqm(tb[NL80211_ATTR_CQM]);
+ break;
default:
printf("unknown event %d\n", gnlh->cmd);
break;
diff --git a/nl80211.h b/nl80211.h
index 28ba20f..daf6a34 100644
--- a/nl80211.h
+++ b/nl80211.h
@@ -323,6 +323,12 @@
* the TX command and %NL80211_ATTR_FRAME includes the contents of the
* frame. %NL80211_ATTR_ACK flag is included if the recipient acknowledged
* the frame.
+ * @NL80211_CMD_SET_CQM: Connection quality monitor configuration. This command
+ * is used to configure connection quality monitoring notification trigger
+ * levels.
+ * @NL80211_CMD_NOTIFY_CQM: Connection quality monitor notification. This
+ * command is used as an event to indicate the that a trigger level was
+ * reached.
*
* @NL80211_CMD_MAX: highest used command number
* @__NL80211_CMD_AFTER_LAST: internal use
@@ -419,6 +425,9 @@ enum nl80211_commands {
NL80211_CMD_SET_POWER_SAVE,
NL80211_CMD_GET_POWER_SAVE,
+ NL80211_CMD_SET_CQM,
+ NL80211_CMD_NOTIFY_CQM,
+
/* add new commands above here */
/* used to define NL80211_CMD_MAX below */
@@ -691,6 +700,9 @@ enum nl80211_commands {
* @NL80211_ATTR_ACK: Flag attribute indicating that the frame was
* acknowledged by the recipient.
*
+ * @NL80211_ATTR_CQM: connection quality monitor configuration in a
+ * nested attribute with %NL80211_ATTR_CQM_* sub-attributes.
+ *
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
*/
@@ -842,6 +854,8 @@ enum nl80211_attrs {
NL80211_ATTR_PS_STATE,
+ NL80211_ATTR_CQM,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
@@ -1583,4 +1597,40 @@ enum nl80211_ps_state {
NL80211_PS_ENABLED,
};
+/**
+ * enum nl80211_attr_cqm - connection quality monitor attributes
+ * @__NL80211_ATTR_CQM_INVALID: invalid
+ * @NL80211_ATTR_CQM_RSSI_THOLD: RSSI threshold in dBm. This value specifies
+ * the threshold for the RSSI level at which an event will be sent. Zero
+ * to disable.
+ * @NL80211_ATTR_CQM_RSSI_HYST: RSSI hysteresis in dBm. This value specifies
+ * the minimum amount the RSSI level must change after an event before a
+ * new event may be issued (to reduce effects of RSSI oscillation).
+ * @NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT: RSSI threshold event
+ * @__NL80211_ATTR_CQM_AFTER_LAST: internal
+ * @NL80211_ATTR_CQM_MAX: highest key attribute
+ */
+enum nl80211_attr_cqm {
+ __NL80211_ATTR_CQM_INVALID,
+ NL80211_ATTR_CQM_RSSI_THOLD,
+ NL80211_ATTR_CQM_RSSI_HYST,
+ NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
+
+ /* keep last */
+ __NL80211_ATTR_CQM_AFTER_LAST,
+ NL80211_ATTR_CQM_MAX = __NL80211_ATTR_CQM_AFTER_LAST - 1
+};
+
+/**
+ * enum nl80211_cqm_rssi_threshold_event - RSSI threshold event
+ * @NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW - The RSSI level is lower than the
+ * configured threshold
+ * @NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH - The RSSI is higher than the
+ * configured threshold
+ */
+enum nl80211_cqm_rssi_threshold_event {
+ NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
+ NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
+};
+
#endif /* __LINUX_NL80211_H */
--
1.6.3.3
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