From 6829308d4f625b5d0a03550597e5b3be20932346 Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes@sipsolutions.net>
Date: Tue, 2 Feb 2010 20:51:42 +0100
Subject: [PATCH] add off-channel command

---
 Makefile |  2 +-
 event.c  | 11 +++++++++++
 offch.c  | 43 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 55 insertions(+), 1 deletion(-)
 create mode 100644 offch.c

diff --git a/Makefile b/Makefile
index 2a6fc9a..bae1bfb 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
+	reason.o status.o connect.o link.o offch.o
 OBJS += sections.o
 ALL = iw
 
diff --git a/event.c b/event.c
index 445db5f..01a325c 100644
--- a/event.c
+++ b/event.c
@@ -302,6 +302,17 @@ static int print_event(struct nl_msg *msg, void *arg)
 				get_reason_str(nla_get_u16(tb[NL80211_ATTR_REASON_CODE])));
 		printf("\n");
 		break;
+	case NL80211_CMD_REMAIN_ON_CHANNEL:
+		printf("remain on freq %d (%dms, cookie %llx)\n",
+			nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]),
+			nla_get_u32(tb[NL80211_ATTR_DURATION]),
+			(unsigned long long)nla_get_u64(tb[NL80211_ATTR_COOKIE]));
+		break;
+	case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
+		printf("done with remain on freq %d (cookie %llx)\n",
+			nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]),
+			(unsigned long long)nla_get_u64(tb[NL80211_ATTR_COOKIE]));
+		break;
 	default:
 		printf("unknown event %d\n", gnlh->cmd);
 		break;
diff --git a/offch.c b/offch.c
new file mode 100644
index 0000000..b40a523
--- /dev/null
+++ b/offch.c
@@ -0,0 +1,43 @@
+#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 offchannel(struct nl80211_state *state, struct nl_cb *cb,
+		      struct nl_msg *msg, int argc, char **argv)
+{
+	char *end;
+
+	/* freq */
+	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ,
+		    strtoul(argv[0], &end, 10));
+	if (*end != '\0')
+		return 1;
+	argv++;
+	argc--;
+
+	/* duration */
+	NLA_PUT_U32(msg, NL80211_ATTR_DURATION,
+		    strtoul(argv[0], &end, 10));
+	if (*end != '\0')
+		return 1;
+	argv++;
+	argc--;
+
+	if (argc)
+		return 1;
+
+	return 0;
+ nla_put_failure:
+	return -ENOSPC;
+}
+
+TOPLEVEL(offchannel, "<freq> <duration>", NL80211_CMD_REMAIN_ON_CHANNEL, 0,
+	 CIB_NETDEV, offchannel,
+	 "Leave operating channel and go to the given channel for a while.");
-- 
2.39.2