openconnect: make host dependency more resilient

Retry when resolveip fails as it seems to be causing issues
on startup depending on various unpredictable parameters.

Resolves: #23185

Signed-off-by: Nikos Mavrogiannopoulos <n.mavrogiannopoulos@gmail.com>

net/openconnect/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=openconnect
 PKG_VERSION:=9.12
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://www.infradead.org/openconnect/download

net/openconnect/files/openconnect.sh

@@ -46,6 +46,7 @@ proto_openconnect_add_form_entry() {
 
 proto_openconnect_setup() {
 	local config="$1"
+	local tmpfile="/tmp/openconnect-server.$$.tmp"
 
 	json_get_vars \
 		authgroup \
@@ -76,11 +77,21 @@ proto_openconnect_setup() {
 	logger -t openconnect "initializing..."
 
 	[ -n "$interface" ] && {
+		local trials=5
+
 		logger -t "openconnect" "adding host dependency for $server at $config"
-		for ip in $(resolveip -t 10 "$server"); do
-			logger -t "openconnect" "adding host dependency for $ip at $config"
-			proto_add_host_dependency "$config" "$ip" "$interface"
+		while resolveip -t 10 "$server" > "$tmpfile" && [ "$trials" -gt 0 ]; do
+			sleep 5
+			trials=$((trials - 1))
 		done
+
+		if [ -s "$tmpfile" ]; then
+			for ip in $(cat "$tmpfile"); do
+				logger -t "openconnect" "adding host dependency for $ip at $config"
+				proto_add_host_dependency "$config" "$ip" "$interface"
+			done
+		fi
+		rm -f "$tmpfile"
 	}
 
 	[ -n "$port" ] && port=":$port"