From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Tremer To: development@lists.ipfire.org Subject: [PATCH 1/3] dhcpcd: Force setting MTU through dhcpcd Date: Tue, 22 Feb 2022 12:18:04 +0000 Message-ID: <20220222121806.1208994-1-michael.tremer@ipfire.org> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0224748342898291923==" List-Id: --===============0224748342898291923== Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable The DHCP server can instruct clients to configure a certain MTU. This used to be done by setting the MTU of the interface. However, dhcpcd has changed this behaviour using routes to. We used to have a modified version of the old mechanism which no longer works well with the new system and is therefore to be dropped. This is the first commit in the series implementing the new behaviour and telling dhcpcd to use the configured MTU. Fixes: #12563 Signed-off-by: Michael Tremer --- src/initscripts/networking/functions.network | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/src/initscripts/networking/functions.network b/src/initscripts/n= etworking/functions.network index 7ec50f436..eae4a7b7c 100644 --- a/src/initscripts/networking/functions.network +++ b/src/initscripts/networking/functions.network @@ -61,7 +61,7 @@ dhcpcd_start() { # This function will start a dhcpcd on a speciefied device. =20 local device=3D"$1" - local dhcp_start=3D"" + local dhcp_start=3D() =20 boot_mesg -n "Starting dhcpcd on the ${device} interface..." =20 @@ -76,11 +76,16 @@ dhcpcd_start() { =20 # Check if a DHCP hostname has been set. if [ -n "${RED_DHCP_HOSTNAME}" ]; then - dhcp_start+=3D"-h ${RED_DHCP_HOSTNAME}" + dhcp_start+=3D( "-h" "${RED_DHCP_HOSTNAME}" ) + fi + + # Tell dhcpcd to use the configured MTU + if [ -n "${RED_DHCP_FORCE_MTU}" ]; then + dhcp_start+=3D( "--static" "mtu=3D${RED_DHCP_FORCE_MTU}" ) fi =20 # Start dhcpcd. - /sbin/dhcpcd ${dhcp_start} ${device} >/dev/null 2>&1 + /sbin/dhcpcd "${dhcp_start[@]}" ${device} >/dev/null 2>&1 ret=3D"$?" =20 if [ "${ret}" -eq 0 ]; then --=20 2.30.2 --===============0224748342898291923==--