mwan3: don't call rpcd on 'mwan3 interfaces'

Allow `mwan3 interfaces` to get uptime via an internal function and
thus remove the dependency on rpcd for `mwan3 interface` calls.

Signed-off-by: Aaron Goodman <aaronjg@stanford.edu>

net/mwan3/files/lib/mwan3/common.sh

@@ -1,10 +1,5 @@
 #!/bin/sh
 
-get_uptime() {
-	local uptime=$(cat /proc/uptime)
-	echo "${uptime%%.*}"
-}
-
 IP4="ip -4"
 IP6="ip -6"
 SCRIPTNAME="$(basename "$0")"
@@ -180,3 +175,18 @@ mwan3_count_one_bits()
 	done
 	echo $count
 }
+
+get_uptime() {
+	local uptime=$(cat /proc/uptime)
+	echo "${uptime%%.*}"
+}
+
+get_online_time() {
+	local time_n time_u iface
+	iface="$1"
+	time_u="$(cat "$MWAN3TRACK_STATUS_DIR/${iface}/ONLINE" 2>/dev/null)"
+	[ -z "${time_u}" ] || [ "${time_u}" = "0" ] || {
+		time_n="$(get_uptime)"
+		echo $((time_n-time_u))
+	}
+}

net/mwan3/files/lib/mwan3/mwan3.sh

@@ -1053,15 +1053,8 @@ mwan3_report_iface_status()
 	if [ "$result" = "offline" ]; then
 		:
 	elif [ $error -eq 0 ]; then
-		json_init
-		json_add_string section interfaces
-		json_add_string interface "$1"
-		json_load "$(ubus call mwan3 status "$(json_dump)")"
-		json_select "interfaces"
-		json_select "$1"
-		json_get_vars online uptime
-		json_select ..
-		json_select ..
+		online=$(get_online_time "$1")
+		network_get_uptime uptime "$1"
 		online="$(printf '%02dh:%02dm:%02ds\n' $((online/3600)) $((online%3600/60)) $((online%60)))"
 		uptime="$(printf '%02dh:%02dm:%02ds\n' $((uptime/3600)) $((uptime%3600/60)) $((uptime%60)))"
 		result="$(mwan3_get_iface_hotplug_state $1) $online, uptime $uptime"

net/mwan3/files/usr/libexec/rpcd/mwan3

@@ -69,6 +69,26 @@ report_policies_v6() {
 	done
 }
 
+get_age() {
+	local time_p time_u
+	iface="$1"
+	time_p="$(cat "$MWAN3TRACK_STATUS_DIR/${iface}/TIME")"
+	[ -z "${time_p}" ] || {
+		time_n="$(get_uptime)"
+		echo $((time_n-time_p))
+	}
+}
+
+get_offline_time() {
+	local time_n time_d iface
+	iface="$1"
+	time_d="$(cat "$MWAN3TRACK_STATUS_DIR/${iface}/OFFLINE")"
+	[ -z "${time_d}" ] || [ "${time_d}" = "0" ] || {
+		time_n="$(get_uptime)"
+		echo $((time_n-time_d))
+	}
+}
+
 get_mwan3_status() {
 	local iface="${1}"
 	local iface_select="${2}"
@@ -85,23 +105,9 @@ get_mwan3_status() {
 
 	track_status="$(mwan3_get_mwan3track_status "$1")"
 	[ "$track_status" = "active" ] && running="1"
-	time_p="$(cat "$MWAN3TRACK_STATUS_DIR/${iface}/TIME")"
-	[ -z "${time_p}" ] || {
-		time_n="$(get_uptime)"
-		let age=time_n-time_p
-	}
-
-	time_u="$(cat "$MWAN3TRACK_STATUS_DIR/${iface}/ONLINE")"
-	[ -z "${time_u}" ] || [ "${time_u}" = "0" ] || {
-		time_n="$(get_uptime)"
-		let online=time_n-time_u
-	}
-
-	time_d="$(cat "$MWAN3TRACK_STATUS_DIR/${iface}/OFFLINE")"
-	[ -z "${time_d}" ] || [ "${time_d}" = "0" ] || {
-		time_n="$(get_uptime)"
-		let offline=time_n-time_d
-	}
+	age=$(get_age "$iface")
+	online=$(get_online_time "$iface")
+	offline=$(get_offline_time "$iface")
 
 	local uptime="0"