Add iperf3 with patch to fix compilation issue

iperf3/Makefile

@@ -0,0 +1,83 @@
+#
+# Copyright (C) 2007-2010 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=iperf
+PKG_VERSION:=3.10.1
+PKG_RELEASE:=1
+
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
+PKG_SOURCE_URL:=https://downloads.es.net/pub/iperf
+PKG_HASH:=03bc9760cc54a245191d46bfc8edaf8a4750f0e87abca6764486972044d6715a
+
+PKG_MAINTAINER:=Felix Fietkau <nbd@nbd.name>
+PKG_LICENSE:=BSD-3-Clause
+
+PKG_BUILD_PARALLEL:=1
+PKG_INSTALL:=1
+
+PKG_FIXUP:=autoreconf
+
+include $(INCLUDE_DIR)/package.mk
+
+DISABLE_NLS:=
+
+define Package/iperf3/default
+  SECTION:=net
+  CATEGORY:=Network
+  TITLE:=Internet Protocol bandwidth measuring tool
+  URL:=https://github.com/esnet/iperf
+endef
+
+define Package/iperf3
+$(call Package/iperf3/default)
+  VARIANT:=nossl
+endef
+
+define Package/iperf3-ssl
+$(call Package/iperf3/default)
+  TITLE+= with iperf_auth support
+  VARIANT:=ssl
+  DEPENDS:= +libopenssl
+endef
+
+TARGET_CFLAGS += -D_GNU_SOURCE
+CONFIGURE_ARGS += --disable-shared
+
+ifeq ($(BUILD_VARIANT),ssl)
+	CONFIGURE_ARGS += --with-openssl="$(STAGING_DIR)/usr"
+else
+	CONFIGURE_ARGS += --without-openssl
+endif
+
+MAKE_FLAGS += noinst_PROGRAMS=
+
+define Package/iperf3/description
+ Iperf is a modern alternative for measuring TCP and UDP bandwidth
+ performance, allowing the tuning of various parameters and
+ characteristics.
+endef
+
+# autoreconf fails if the README file isn't present
+define Build/Prepare
+	$(call Build/Prepare/Default)
+	touch $(PKG_BUILD_DIR)/README
+endef
+
+define Package/iperf3/install
+	$(INSTALL_DIR) $(1)/usr/bin
+	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/bin/iperf3 $(1)/usr/bin/
+endef
+
+define Package/iperf3-ssl/install
+	$(INSTALL_DIR) $(1)/usr/bin
+	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/bin/iperf3 $(1)/usr/bin/
+endef
+
+$(eval $(call BuildPackage,iperf3))
+$(eval $(call BuildPackage,iperf3-ssl))

iperf3/patches/remove-in6_flowlabel_req.patch

@@ -0,0 +1,24 @@
+--- a/src/flowlabel.h	2021-06-24 13:26:33.142463630 +0200
++++ b/src/flowlabel.h	2021-06-24 13:27:45.669235179 +0200
+@@ -37,21 +37,6 @@
+    conflicts with "netinet/in.h" .
+ */
+ 
+-#ifndef __ANDROID__
+-struct in6_flowlabel_req
+-{
+-    struct in6_addr flr_dst;
+-    __u32   flr_label;
+-    __u8    flr_action;
+-    __u8    flr_share;
+-    __u16   flr_flags;
+-    __u16   flr_expires;
+-    __u16   flr_linger;
+-    __u32   __flr_pad;
+-    /* Options in format of IPV6_PKTOPTIONS */
+-};
+-#endif
+-
+ #define IPV6_FL_A_GET           0
+ #define IPV6_FL_A_PUT           1
+ #define IPV6_FL_A_RENEW         2