recipes-wifi/iw/patches-mlo/0013-iw-add-link_id-for-offchannel-operation.patch

From 1bc783af16926b73f98f0c1b67ab90cf39e030a1 Mon Sep 17 00:00:00 2001
From: Michael-CY Lee <michael-cy.lee@mediatek.com>
Date: Thu, 27 Jun 2024 08:37:52 +0800
Subject: [PATCH 13/13] iw: add link_id for offchannel operation

NL80211_CMD_REMAIN_ON_CANNEL has flag NL80211_FLAG_MLO_VALID_LINK_ID, so
a link_id is necessary when the interface is MLD.

Usage:
iw dev <ifname> offchannel [-l link_id] <freq> <duration>

Signed-off-by: Michael-CY Lee <michael-cy.lee@mediatek.com>
---
 offch.c | 24 ++++++++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

diff --git a/offch.c b/offch.c
index 19e170e..3858ccd 100644
--- a/offch.c
+++ b/offch.c
@@ -14,6 +14,26 @@ static int offchannel(struct nl80211_state *state,
 		      enum id_input id)
 {
 	char *end;
+	unsigned int link_id;
+
+	if (argc < 2)
+		return 1;
+
+	/* link id */
+	if (!strcmp(argv[0], "-l")) {
+		link_id = strtol(argv[1], &end, 10);
+		if (*end)
+			return 1;
+
+		if (link_id >= IEEE80211_MLD_MAX_NUM_LINKS) {
+			printf("link id %d exceeds max number of links\n",
+				link_id);
+			return 2;
+		}
+		NLA_PUT_U8(msg, NL80211_ATTR_MLO_LINK_ID, link_id);
+		argv += 2;
+		argc -= 2;
+	}
 
 	if (argc < 2)
 		return 1;
@@ -42,6 +62,6 @@ static int offchannel(struct nl80211_state *state,
 	return -ENOSPC;
 }
 
-TOPLEVEL(offchannel, "<freq> <duration>", NL80211_CMD_REMAIN_ON_CHANNEL, 0,
-	 CIB_NETDEV, offchannel,
+TOPLEVEL(offchannel, "[-l link_id] <freq> <duration>",
+	 NL80211_CMD_REMAIN_ON_CHANNEL, 0, CIB_NETDEV, offchannel,
 	 "Leave operating channel and go to the given channel for a while.");
-- 
2.18.0