openipc-ai · Sep 18, 2026 · Sep 18, 2026 · Sep 18, 2026 · Sep 18, 2026 · Sep 18, 2026
@@ -0,0 +1,82 @@
+#!/bin/sh
+
+read_subshell_pid() {
+	IFS=' ' read -r subshell_pid _ < /proc/self/stat
+}
+
+run_cmd_internal() {
+	local subshell_pid
+	read_subshell_pid
+	local run_cmd_prog="${0##*/}[$subshell_pid]"
+	local run_cmd_msg="$1"
+	local run_cmd_var="$2"
+	local run_cmd_fatal="$3"
+	shift 3
+
+	local run_cmd_output
+	run_cmd_output=$("$@" 2>&1)
+	local run_cmd_rc=$?
+
+	if [ "$run_cmd_rc" -ne 0 ]; then
+		if [ -n "$run_cmd_msg" ]; then
+			logger -p user.err -t "$run_cmd_prog" "$run_cmd_msg"
+		fi
+
+		local run_cmd_symbol
+		[ -z "$run_cmd_output" ] && run_cmd_symbol="." || run_cmd_symbol=":"
+		logger -p user.err -t "$run_cmd_prog" "Command \`$*\` finished with code $run_cmd_rc$run_cmd_symbol"
+
+		if [ -n "$run_cmd_output" ]; then
+			printf '%s\n' "$run_cmd_output" |
+			while IFS= read -r line; do
+				logger -p user.err -t "$run_cmd_prog" "$line"
+			done
+
+			echo "$run_cmd_output" >&2
+		fi
+
+		if [ "$run_cmd_fatal" = "false" ]; then
+			return "$run_cmd_rc"
+		fi
+
+		exit "$run_cmd_rc"
+	fi
+
+	if [ -n "$run_cmd_var" ]; then
+		eval "$run_cmd_var=\"\$run_cmd_output\""
+	elif [ -n "$run_cmd_output" ]; then
+		echo "$run_cmd_output"
+	fi
+}
+
+run_cmd_nonfatal() {
+	local run_cmd_msg="$1"
+	local run_cmd_var="$2"
+	shift 2
+	run_cmd_internal "$run_cmd_msg" "$run_cmd_var" "false" "$@"
+}
+
+run_cmd() {
+	local run_cmd_msg="$1"
+	local run_cmd_var="$2"
+	shift 2
+	run_cmd_internal "$run_cmd_msg" "$run_cmd_var" "true" "$@"
+}
+
+kill_pid_file() {
+	local signal
+
+	if [ "${1:0:1}" = "-" ]; then
+		signal="$1"
+		shift
+	else
+		signal=-15
+	fi
+
+	[ -f "$1" ] || return 251
+	local pid=$(cat "$1" 2>/dev/null)
+	[ -n "$pid" ] && [ -d "/proc/$pid" ] || return 252
+	[ "$(cat "/proc/$pid/comm" 2>/dev/null)" = "$2" ] || return 253
+	run_cmd_nonfatal "" "" kill "$signal" "$pid" &&
+		run_cmd_nonfatal "" "" rm -f "$1"
+}
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+. /usr/sbin/common
+kill_pid_file "$@"
@@ -1,55 +1,6 @@
 #!/bin/sh
 
-run_cmd() {
-	local prog="${0##*/}"
-	local msg="$1"
-	local var="$2"
-	shift 2
-
-	local fatal
-
-	if [ "$var" = "--non-fatal" ]; then
-		fatal="false"
-		var=""
-	else
-		fatal="true"
-	fi
-
-	local output
-	output=$("$@" 2>&1)
-	local rc=$?
-
-	if [ "$rc" -ne 0 ]; then
-		if [ -n "$msg" ]; then
-			logger -p user.err -t "$prog[$$]" "$msg"
-		fi
-
-		local symbol
-		[ -z "$output" ] && symbol="." || symbol=":"
-		logger -p user.err -t "$prog[$$]" "Command \`$*\` finished with code $rc$symbol"
-
-		if [ -n "$output" ]; then
-			printf '%s\n' "$output" |
-			while IFS= read -r line; do
-				logger -p user.err -t "$prog[$$]" "$line"
-			done
-
-			echo "$output" >&2
-		fi
-
-		if [ "$fatal" = "false" ]; then
-			return
-		fi
-
-		exit "$rc"
-	fi
-
-	if [ -n "$var" ]; then
-		eval "$var=\"\$output\""
-	elif [ -n "$output" ]; then
-		echo "$output"
-	fi
-}
+. /usr/sbin/common
 
 run_cmd "Failed to read wg_privkey U-Boot environment variable" WG_PRIVKEY fw_printenv -n wg_privkey
 run_cmd "Failed to read wg_endpoint U-Boot environment variable" WG_ENDPOINT fw_printenv -n wg_endpoint
@@ -71,7 +22,7 @@ if ! echo "$HOST" | grep -qE '^\[|^((^|\.)(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[
 	done
 fi
 
-(
+{
 	echo "#"
 	echo "[Interface]"
 	echo "PrivateKey = $WG_PRIVKEY"
@@ -83,13 +34,13 @@ fi
 	[ -n "$WG_SHARKEY" ] && echo "PresharedKey = $WG_SHARKEY"
 	echo "AllowedIPs = $WG_ALLOWED"
 	echo "#"
-) >>/tmp/wireguard.conf
+} >/tmp/wireguard.conf
 
 run_cmd "Failed to apply wireguard configuration" "" wg setconf wg0 /tmp/wireguard.conf
 
-run_cmd "" --non-fatal ip address add dev wg0 "$WG_ADDRESS"
-run_cmd "" --non-fatal ip link set up dev wg0
+run_cmd_nonfatal "" "" ip address add dev wg0 "$WG_ADDRESS"
+run_cmd_nonfatal "" "" ip link set up dev wg0
 
 for i in $(echo "$WG_ALLOWED" | tr ',' ' '); do
-	run_cmd "" --non-fatal ip -4 route add "$i" dev wg0
+	run_cmd_nonfatal "" "" ip -4 route add "$i" dev wg0
 done
@@ -1,53 +1,115 @@
 #!/bin/sh
-#
-# OpenIPC.org | v.20230212
-# by Igor Zalatov, aka FlyRouter, aka ZigFisher
-# Busybox applets: awk cat echo insmod ip modprobe sha1sum sleep tr tunctl udhcpc uptime
-#
 
-vtund_enable="true"
 vtund_server=${1:-vtun.localhost}
 vtund_port="5000"
 vtund_iface="tunnel"
 device_name="IPC-VTUND"
 working_dir="/tmp"
+identity_cfg="$working_dir/vtund.conf"
+udhcpc_pid="$working_dir/udhcpc-$vtund_iface.pid"
+delay_start=0
+delay_step=10
+delay_max=300
 
-identity() {
-	identity_src=$(ip r | awk '/default/ {print $5}' | head -n 1)
-	identity_mac=$(cat /sys/class/net/"$identity_src"/address | tr 'a-z' 'A-Z')
-	identity_pas=$(echo "$identity_mac" | sha1sum | awk '{print $1}')
-	identity_tid=$(echo "$identity_mac" | tr -d ':')
-	identity_cfg=$working_dir/vtund.conf
+. /usr/sbin/common
+
+log() {
+	logger -p $1 -t "$prog" "$2"
 }
 
-interface() {
-	[ -L /sys/class/net/$vtund_iface ] || (modprobe tun; tunctl -t $vtund_iface) >/dev/null 2>&1
-	[ -f $working_dir/udhcpc-$vtund_iface.pid ] && kill -9 "$(cat $working_dir/udhcpc-$vtund_iface.pid)" >/dev/null 2>&1
+warning() {
+	log daemon.warn "$1"
 }
 
-config() {
-	( echo "options {"
-		echo "	port $vtund_port;"
-		echo "	ifconfig /sbin/ifconfig;"
-		echo "}"
-		echo "$identity_tid {"
-		echo "	password $identity_pas;"
-		echo "	device $vtund_iface;"
-		echo "	stat no;"
-		echo "	persist yes;"
-		echo "	keepalive 10:5;"
-		echo "	timeout 10;"
-		echo "	up {"
-		echo "		ifconfig \"$vtund_iface hw ether $identity_mac mtu 1500 -multicast up\";"
-		echo "		program \"udhcpc -T 1 -t 5 -R -b -O staticroutes -S -s tapip -p $working_dir/udhcpc-$vtund_iface.pid -i $vtund_iface -x hostname:$device_name-$identity_tid\";"
-		echo "	};"
-		echo "	down {"
-		echo "		ifconfig \"$vtund_iface down\";"
-		echo "	};"
-		echo "}"
-		) >$identity_cfg
+info() {
+	log daemon.info "$1"
 }
 
-if [ "$vtund_enable" = "true" ]; then
-	(while true; do identity; interface; config; vtund -n -f "$identity_cfg" "$identity_tid" "$vtund_server" >/dev/null 2>&1; done) &
-fi
+ready() {
+	identity_src=$(ip r | awk '/default/ {print $5}' | head -n 1)
+
+	[ -n "$identity_src" ] || {
+		warning "Unable to determine the default network interface"
+		return 1
+	}
+
+	identity_mac=$(cat "/sys/class/net/$identity_src/address" 2>/dev/null | tr 'a-z' 'A-Z')
+
+	[ -n "$identity_mac" ] || {
+		warning "Unable to read the MAC address of the default network interface"
+		return 1
+	}
+
+	echo "$vtund_server" | grep -qE '^((^|\.)(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])){4}$' && return 0
+
+	nslookup "$vtund_server" >/dev/null 2>&1 || {
+		warning "Unable to resolve the VTun server address"
+		return 1
+	}
+}
+
+{
+	read_subshell_pid
+	prog="${0##*/}[$subshell_pid]"
+	restart_delay=$delay_start
+
+	while true; do
+		while true; do
+			if ! ready; then
+				ready_delay=$delay_start
+
+				while true; do
+					[ $ready_delay -lt $delay_max ] && ready_delay=$(( ready_delay + delay_step ))
+					sleep $ready_delay
+					ready && break
+				done
+
+				info "Starting the tunnel to $vtund_server"
+			fi
+
+			if [ ! -L "/sys/class/net/$vtund_iface" ]; then
+				run_cmd_nonfatal "" "" modprobe tun || break
+				run_cmd_nonfatal "" "" tunctl -t "$vtund_iface" || break
+			fi
+
+			kill_pid_file -9 "$udhcpc_pid" udhcpc
+
+			identity_pas=$(echo "$identity_mac" | sha1sum | awk '{print $1}')
+			identity_tid=$(echo "$identity_mac" | tr -d ':')
+
+			{
+				echo "options {"
+				echo "	port $vtund_port;"
+				echo "	ifconfig /sbin/ifconfig;"
+				echo "}"
+				echo "$identity_tid {"
+				echo "	password $identity_pas;"
+				echo "	device $vtund_iface;"
+				echo "	stat no;"
+				echo "	persist yes;"
+				echo "	keepalive 10:5;"
+				echo "	timeout 10;"
+				echo "	up {"
+				echo "		ifconfig \"$vtund_iface hw ether $identity_mac mtu 1500 -multicast up\";"
+				echo "		program \"udhcpc -T 1 -t 5 -R -b -O staticroutes -S -s tapip -p '$udhcpc_pid' -i $vtund_iface -x hostname:$device_name-$identity_tid\";"
+				echo "	};"
+				echo "	down {"
+				echo "		program \"kill_pid_file -9 '$udhcpc_pid' udhcpc\";"
+				echo "		ifconfig \"$vtund_iface down\";"
+				echo "	};"
+				echo "}"
+			} >"$identity_cfg"
+
+			# workaround for VTun bug described in https://bugzilla.redhat.com/show_bug.cgi?id=1462458#c26
+			run_cmd_nonfatal "" "" ifconfig $vtund_iface hw ether $identity_mac mtu 1500 -multicast up || break
+
+			vtund -n -f "$identity_cfg" "$identity_tid" "$vtund_server" >/dev/null 2>&1 &&
+				restart_delay=$delay_start
+
+			break
+		done
+
+		[ $restart_delay -lt $delay_max ] && restart_delay=$(( restart_delay + delay_step ))
+		sleep $restart_delay
+	done
+} &