Use link-local addresses for USB gadget NICs

Add systemd-networkd, since it provided the easiest solution to get
link-local addresses directly (instead of only after DHCP discovery
times out).

Task-number: QTBUG-55434
Change-Id: I4198514a0bfef9d65da33f27af64a5055567dd9b
Reviewed-by: Samuli Piippo <samuli.piippo@qt.io>

2 files changed, 14 insertions, 1 deletions

diff --git a/recipes/systemd/systemd/usb-rndis.network b/recipes/systemd/systemd/usb-rndis.network
new file mode 100644
index 0000000..d529eeb
--- /dev/null
+++ b/recipes/systemd/systemd/usb-rndis.network
@@ -0,0 +1,5 @@
+[Match]
+Type=gadget
+
+[Network]
+LinkLocalAddressing=yes
diff --git a/recipes/systemd/systemd_%.bbappend b/recipes/systemd/systemd_%.bbappend
index 0877135..4dce1b2 100644
--- a/recipes/systemd/systemd_%.bbappend
+++ b/recipes/systemd/systemd_%.bbappend
@@ -28,11 +28,19 @@
 ############################################################################
 
 FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
-SRC_URI += "file://0020-Revert-core-mount-add-dependencies-to-dynamically-mo.patch"
+SRC_URI += " \
+    file://0020-Revert-core-mount-add-dependencies-to-dynamically-mo.patch \
+    file://usb-rndis.network \
+"
+
+PACKAGECONFIG_append = " networkd"
 
 do_install_append() {
     # remove login from tty1
     rm -f ${D}${sysconfdir}/systemd/system/getty.target.wants/getty@tty1.service
+    # set up link-local IPs for USB network interface
+    install -d ${D}${prefix}/lib/systemd/network/
+    install -m 0644 ${WORKDIR}/usb-rndis.network ${D}${prefix}/lib/systemd/network/
 }
 
 do_verify_patch_required() {