netifd: add support for suppressing the DHCP request hostname by setting it to *

dnsmasq (and probably other DHCP servers as well) does not like to hand out
leases with duplicate host names.
Adding support for skipping the hostname makes it easier to deploy setups
where it is not guaranteed to be unique

Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/package/network/config/netifd/files/lib/netifd/proto/dhcp.sh b/package/network/config/netifd/files/lib/netifd/proto/dhcp.sh
index a2b0ccedbf3271e5a2793cc00b813247ba8330aa..0d06eba06ef60214b9e1c5bd6e5e53ffeb009125 100755 (executable)
--- a/package/network/config/netifd/files/lib/netifd/proto/dhcp.sh
+++ b/package/network/config/netifd/files/lib/netifd/proto/dhcp.sh
@@ -46,6 +46,8 @@ proto_dhcp_setup() {
        json_for_each_item proto_dhcp_add_sendopts sendopts dhcpopts
 
        [ -z "$hostname" ] && hostname="$(cat /proc/sys/kernel/hostname)"
+       [ "$hostname" = "*" ] && hostname=
+
        [ "$defaultreqopts" = 0 ] && defaultreqopts="-o" || defaultreqopts=
        [ "$broadcast" = 1 ] && broadcast="-B" || broadcast=
        [ "$release" = 1 ] && release="-R" || release=