base-files: always set proto passed to _ucidef_set_interface()

Overwrite an already set proto if a new one is passed to
_ucidef_set_interface() similar to what is done for the interface.

It is required when using ""ucidef_set_interface_wan 'ptm0' 'pppoe'"
after some initial wan interface configuration is already done by
ucidef_add_switch.

The "json_is_a protocol string" guard is meant to not reset an earlier
set interface proto in case something like
"ucidef_set_interface_lan 'eth0'" is used afterwards.

Signed-off-by: Mathias Kresin <dev@kresin.me>

diff --git a/package/base-files/files/lib/functions/uci-defaults.sh b/package/base-files/files/lib/functions/uci-defaults.sh
index f4c1d968e2494b3bfb12e93c5a083c955a7abbbd..9fad1896ec93c2de40de52837aab7fc28688e059 100755 (executable)
--- a/package/base-files/files/lib/functions/uci-defaults.sh
+++ b/package/base-files/files/lib/functions/uci-defaults.sh
@@ -35,7 +35,7 @@ _ucidef_set_interface() {
        json_select_object "$name"
        json_add_string ifname "$iface"
 
-       if ! json_is_a protocol string; then
+       if ! json_is_a protocol string || [ -n "$proto" ]; then
                case "$proto" in
                        static|dhcp|none|pppoe) : ;;
                        *)