lldpd: extended interface(s) parsing to handle patterns

For interface type parameters, the man page documents patterns:
```
*,!eth*,!!eth1

uses all interfaces, except interfaces starting with "eth",
but including "eth1".
```

* Renamed `_ifname` to `_l2dev`.
* get the l2dev via network_get_physdev (and not l3dev)
* Glob pattern `*` is also valid - use noglob for this

The net result is that now interface 'names' including globs '*' and '!'
inversions are included in the generated lldpd configs.

Temporarily `set -o noglob` and then `set +o noglob` to disable & enable
globbing respectively, because when we pass `*` as an interface choice,
other file and pathnames get sucked in from where the init script runs,
and the `*` never makes it to lldpd.

Tested extensively on: 22.03.6, 23.05.3

Signed-off-by: Paul Donald <[email protected]>
[ squash with commit bumping release version ]
Signed-off-by: Christian Marangi <[email protected]>

package/network/services/lldpd/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=lldpd
 PKG_VERSION:=1.0.17
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://github.com/lldpd/lldpd/releases/download/$(PKG_VERSION)/

package/network/services/lldpd/files/lldpd.init

@@ -80,12 +80,20 @@ get_config_cid_ifaces() {
 	config_get _ifaces 'config' "$2"
 
 	local _iface _ifnames=""
+	# Set noglob to prevent '*' capturing diverse file names in the for ... in
+	set -o noglob
 	for _iface in $_ifaces; do
-		local _ifname=""
-		if network_get_device _ifname "$_iface" || [ -e "/sys/class/net/$_iface" ]; then
-			append _ifnames "${_ifname:-$_iface}" ","
+
+		local _l2device=""
+		if network_get_physdev _l2device "$_iface" || [ -e "/sys/class/net/$_iface" ]; then
+			append _ifnames "${_l2device:-$_iface}" ","
+		else
+			# Glob case (interface is e.g. '!eth1' or 'eth*' or '*')
+			append _ifnames "$_iface" ","
 		fi
 	done
+	# Turn noglob off i.e. enable glob again
+	set +o noglob
 
 	export -n "${1}=$_ifnames"
 }