Add commands to set and get the antenna configuration. The antenna
configuration is defined as a bitmap of 8 antennas. When multiple antennas are
selected the driver may use diversity. Also the driver may reject antenna
configurations it cannot support.
Signed-off-by: Bruno Randolf <br1@xxxxxxxxxxx>
---
Makefile | 2 +
antenna.c | 88 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
util.c | 2 +
3 files changed, 91 insertions(+), 1 deletions(-)
create mode 100644 antenna.c
diff --git a/Makefile b/Makefile
index d303f45..e526cda 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 cqm.o
+ reason.o status.o connect.o link.o offch.o ps.o cqm.o antenna.o
OBJS += sections.o
ALL = iw
diff --git a/antenna.c b/antenna.c
new file mode 100644
index 0000000..5869aa6
--- /dev/null
+++ b/antenna.c
@@ -0,0 +1,88 @@
+#include <net/if.h>
+#include <errno.h>
+#include <string.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"
+
+SECTION(antenna);
+
+static int set_antenna(struct nl80211_state *state,
+ struct nl_cb *cb,
+ struct nl_msg *msg,
+ int argc, char **argv)
+{
+ char *end;
+ uint8_t tx_ant = 0, rx_ant = 0;
+
+ if (argc == 1)
+ tx_ant = rx_ant = strtoul(argv[0], &end, 10);
+ else if (argc == 4)
+ {
+ while (argc) {
+ if (strcmp(*argv, "tx") == 0 ||
+ strcmp(*argv, "rx") == 0) {
+ if (strcmp(*argv, "tx") == 0)
+ tx_ant = strtoul(argv[1], &end, 10);
+ else
+ rx_ant = strtoul(argv[1], &end, 10);
+ argv = argv + 2;
+ argc = argc - 2;
+ }
+ }
+ }
+
+ if (*end || !tx_ant || !rx_ant)
+ return 1;
+
+ NLA_PUT_U8(msg, NL80211_ATTR_ANTENNA_TX, tx_ant);
+ NLA_PUT_U8(msg, NL80211_ATTR_ANTENNA_RX, rx_ant);
+ return 0;
+
+ nla_put_failure:
+ return -ENOBUFS;
+}
+
+COMMAND(antenna, set, "<bitmap> | tx <bitmap> rx <bitmap>",
+ NL80211_CMD_SET_ANTENNA, 0, CIB_PHY, set_antenna,
+ "Set a bitmap of allowed antennas to use for TX and RX.\n"
+ "The driver may reject antenna configurations it cannot support.");
+
+
+static int print_antenna_handler(struct nl_msg *msg, void *arg)
+{
+ struct nlattr *attrs[NL80211_ATTR_MAX + 1];
+ struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
+ uint8_t tx_ant, rx_ant;
+
+ nla_parse(attrs, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
+ genlmsg_attrlen(gnlh, 0), NULL);
+
+ if (!attrs[NL80211_ATTR_ANTENNA_TX] || !attrs[NL80211_ATTR_ANTENNA_RX])
+ return NL_SKIP;
+
+ tx_ant = nla_get_u8(attrs[NL80211_ATTR_ANTENNA_TX]);
+ rx_ant = nla_get_u8(attrs[NL80211_ATTR_ANTENNA_RX]);
+
+ printf("Antenna configuration: tx %d rx %d\n", tx_ant, rx_ant);
+
+ return NL_SKIP;
+}
+
+static int get_antenna(struct nl80211_state *state,
+ struct nl_cb *cb,
+ struct nl_msg *msg,
+ int argc, char **argv)
+{
+ nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_antenna_handler, NULL);
+ return 0;
+}
+
+COMMAND(antenna, get, NULL, NL80211_CMD_GET_ANTENNA, 0, CIB_PHY, get_antenna,
+ "Retrieve antenna configuration.");
diff --git a/util.c b/util.c
index 0c6d978..7d971ac 100644
--- a/util.c
+++ b/util.c
@@ -166,6 +166,8 @@ static const char *commands[NL80211_CMD_MAX + 1] = {
[NL80211_CMD_REGISTER_ACTION] = "register_action",
[NL80211_CMD_ACTION] = "action",
[NL80211_CMD_SET_CHANNEL] = "set_channel",
+ [NL80211_CMD_SET_ANTENNA] = "antenna_set",
+ [NL80211_CMD_GET_ANTENNA] = "antenna_get",
};
static char cmdbuf[100];
--
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