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386 lines
10 KiB
386 lines
10 KiB
#!/bin/sh
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. /lib/functions.sh
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. /lib/functions/network.sh
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. /lib/mwan3/common.sh
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INTERFACE=""
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DEVICE=""
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IFDOWN_EVENT=0
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IFUP_EVENT=0
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stop_subprocs() {
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[ -n "$SLEEP_PID" ] && kill "$SLEEP_PID" && unset SLEEP_PID
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[ -n "$TRACK_PID" ] && kill "$TRACK_PID" && unset TRACK_PID
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}
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WRAP() {
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# shellcheck disable=SC2048
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FAMILY=$FAMILY DEVICE=$DEVICE SRCIP=$SRC_IP FWMARK=$MMX_DEFAULT LD_PRELOAD=/lib/mwan3/libwrap_mwan3_sockopt.so.1.0 $*
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}
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clean_up() {
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LOG notice "Stopping mwan3track for interface \"${INTERFACE}\". Status was \"${STATUS}\""
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stop_subprocs
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exit 0
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}
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if_down() {
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LOG info "Detect ifdown event on interface ${INTERFACE} (${DEVICE})"
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IFDOWN_EVENT=1
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stop_subprocs
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}
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if_up() {
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LOG info "Detect ifup event on interface ${INTERFACE} (${DEVICE})"
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IFDOWN_EVENT=0
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IFUP_EVENT=1
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STARTED=1
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stop_subprocs
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}
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ping_test_host() {
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if [ "$FAMILY" = "ipv6" ]; then
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echo "::1"
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else
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echo "127.0.0.1"
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fi
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}
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get_ping_command() {
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if [ -x "/usr/bin/ping" ] && /usr/bin/ping -${FAMILY#ipv} -c1 -q $(ping_test_host) &>/dev/null; then
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# -4 option added in iputils c3e68ac6 so need to check if we can use it
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# or if we must use ping and ping6
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echo "/usr/bin/ping -${FAMILY#ipv}"
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elif [ "$FAMILY" = "ipv6" ] && [ -x "/usr/bin/ping6" ]; then
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echo "/usr/bin/ping6"
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elif [ "$FAMILY" = "ipv4" ] && [ -x "/usr/bin/ping" ]; then
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echo "/usr/bin/ping"
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elif [ -x "/bin/ping" ]; then
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echo "/bin/ping -${FAMILY#ipv}"
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else
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return 1
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fi
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}
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validate_track_method() {
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case "$1" in
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ping)
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PING=$(get_ping_command)
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if [ $? -ne 0 ]; then
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LOG warn "Missing ping. Please enable BUSYBOX_DEFAULT_PING and recompile busybox or install iputils-ping package."
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return 1
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fi
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;;
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arping)
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command -v arping 1>/dev/null 2>&1 || {
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LOG warn "Missing arping. Please install iputils-arping package."
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return 1
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}
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;;
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httping)
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command -v httping 1>/dev/null 2>&1 || {
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LOG warn "Missing httping. Please install httping package."
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return 1
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}
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;;
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nping-*)
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command -v nping 1>/dev/null 2>&1 || {
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LOG warn "Missing nping. Please install nping package."
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return 1
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}
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;;
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*)
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LOG warn "Unsupported tracking method: $track_method"
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return 2
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;;
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esac
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}
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validate_wrap() {
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[ -x /lib/mwan3/libwrap_mwan3_sockopt.so.1.0 ] && return
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LOG error "Missing libwrap_mwan3_sockopt. Please reinstall mwan3." &&
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exit 1
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}
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disconnected() {
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STATUS='offline'
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echo "offline" > $MWAN3TRACK_STATUS_DIR/$INTERFACE/STATUS
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get_uptime > $MWAN3TRACK_STATUS_DIR/$INTERFACE/OFFLINE
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echo "0" > $MWAN3TRACK_STATUS_DIR/$INTERFACE/ONLINE
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score=0
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[ "$1" = 1 ] && return
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LOG notice "Interface $INTERFACE ($DEVICE) is offline"
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env -i ACTION="disconnected" INTERFACE="$INTERFACE" DEVICE="$DEVICE" /sbin/hotplug-call iface
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}
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connected() {
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STATUS='online'
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echo "online" > $MWAN3TRACK_STATUS_DIR/$INTERFACE/STATUS
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echo "0" > $MWAN3TRACK_STATUS_DIR/$INTERFACE/OFFLINE
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get_uptime > $MWAN3TRACK_STATUS_DIR/$INTERFACE/ONLINE
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host_up_count=0
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lost=0
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turn=0
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loss=0
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LOG notice "Interface $INTERFACE ($DEVICE) is online"
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env -i FIRSTCONNECT=$1 ACTION="connected" INTERFACE="$INTERFACE" DEVICE="$DEVICE" /sbin/hotplug-call iface
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}
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disabled() {
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STATUS='disabled'
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echo "disabled" > $MWAN3TRACK_STATUS_DIR/$INTERFACE/STATUS
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STARTED=0
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}
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firstconnect() {
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local true_iface
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network_flush_cache
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mwan3_get_true_iface true_iface $INTERFACE
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network_get_device DEVICE $true_iface
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if [ "$STATUS" != "online" ]; then
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config_get STATUS $INTERFACE initial_state "online"
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fi
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if ! network_is_up $true_iface || [ -z "$DEVICE" ]; then
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disabled
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return
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fi
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mwan3_get_src_ip SRC_IP $INTERFACE
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LOG debug "firstconnect: called on $INTERFACE/$true_iface ($DEVICE). Status is $STATUS. SRC_IP is $SRC_IP"
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STARTED=1
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if [ "$STATUS" = "offline" ]; then
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disconnected 1
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else
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connected 1
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fi
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}
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update_status() {
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local track_ip=$1
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echo "$2" > $MWAN3TRACK_STATUS_DIR/$INTERFACE/TRACK_${track_ip}
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[ -z "$3" ] && return
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echo "$3" > $MWAN3TRACK_STATUS_DIR/$INTERFACE/LATENCY_${track_ip}
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echo "$4" > $MWAN3TRACK_STATUS_DIR/$INTERFACE/LOSS_${track_ip}
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}
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main() {
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local reliability count timeout interval failure_interval
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local recovery_interval down up size
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local keep_failure_interval check_quality failure_latency
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local recovery_latency failure_loss recovery_loss
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local max_ttl httping_ssl track_ips do_log
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INTERFACE=$1
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STATUS=""
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STARTED=0
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TRACK_OUTPUT=$MWAN3TRACK_STATUS_DIR/$INTERFACE/TRACK_OUTPUT
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mwan3_init
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mkdir -p $MWAN3TRACK_STATUS_DIR/$INTERFACE
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trap clean_up TERM
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trap if_down USR1
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trap if_up USR2
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config_load mwan3
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config_get FAMILY $INTERFACE family ipv4
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config_get track_method $INTERFACE track_method ping
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config_get_bool httping_ssl $INTERFACE httping_ssl 0
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validate_track_method $track_method || {
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track_method=ping
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if validate_track_method $track_method; then
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LOG warn "Using ping to track interface $INTERFACE avaliability"
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else
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LOG err "No track method avaliable"
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exit 1
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fi
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}
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config_get reliability $INTERFACE reliability 1
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config_get count $INTERFACE count 1
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config_get timeout $INTERFACE timeout 4
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config_get interval $INTERFACE interval 10
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config_get down $INTERFACE down 5
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config_get up $INTERFACE up 5
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config_get size $INTERFACE size 56
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config_get max_ttl $INTERFACE max_ttl 60
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config_get failure_interval $INTERFACE failure_interval $interval
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config_get_bool keep_failure_interval $INTERFACE keep_failure_interval 0
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config_get recovery_interval $INTERFACE recovery_interval $interval
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config_get_bool check_quality $INTERFACE check_quality 0
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config_get failure_latency $INTERFACE failure_latency 1000
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config_get recovery_latency $INTERFACE recovery_latency 500
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config_get failure_loss $INTERFACE failure_loss 40
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config_get recovery_loss $INTERFACE recovery_loss 10
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local sleep_time result ping_status loss latency
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mwan3_list_track_ips()
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{
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track_ips="$track_ips $1"
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}
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config_list_foreach "$1" track_ip mwan3_list_track_ips
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local score=$((down+up))
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local host_up_count=0
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local lost=0
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local turn=0
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firstconnect
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while true; do
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[ $STARTED -eq 0 ] && { sleep $MAX_SLEEP & SLEEP_PID=$!; wait; }
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unset SLEEP_PID
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sleep_time=$interval
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for track_ip in $track_ips; do
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if [ $host_up_count -lt $reliability ]; then
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case "$track_method" in
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ping)
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if [ $check_quality -eq 0 ]; then
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WRAP $PING -c $count -W $timeout -s $size -t $max_ttl -q $track_ip &> /dev/null &
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TRACK_PID=$!
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wait $TRACK_PID
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result=$?
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else
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WRAP $PING -c $count -W $timeout -s $size -t $max_ttl -q $track_ip 2>/dev/null > $TRACK_OUTPUT &
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TRACK_PID=$!
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wait $TRACK_PID
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ping_status=$?
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loss="$(sed $TRACK_OUTPUT -ne 's/.*\([0-9]\+\)% packet loss.*/\1/p')"
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if [ "$ping_status" -ne 0 ] || [ "$loss" -eq 100 ]; then
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latency=999999
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loss=100
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else
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latency="$(sed $TRACK_OUTPUT -ne 's%\(rtt\|round-trip\).* = [^/]*/\([0-9]\+\).*%\2%p')"
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fi
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fi
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;;
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arping)
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WRAP arping -I $DEVICE -c $count -w $timeout -q $track_ip &> /dev/null &
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TRACK_PID=$!
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wait $TRACK_PID
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result=$?
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;;
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httping)
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if [ "$httping_ssl" -eq 1 ]; then
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WRAP httping -c $count -t $timeout -q "https://$track_ip" &> /dev/null &
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else
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WRAP httping -c $count -t $timeout -q "http://$track_ip" &> /dev/null &
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fi
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TRACK_PID=$!
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wait $TRACK_PID
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result=$?
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;;
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nping-*)
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WRAP nping -c $count $track_ip --${FAMILY#nping-} > $TRACK_OUTPUT &
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TRACK_PID=$!
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wait $TRACK_PID
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result=$(grep $TRACK_OUTPUT Lost | awk '{print $12}')
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;;
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esac
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do_log=""
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if [ $check_quality -eq 0 ]; then
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if [ $result -eq 0 ]; then
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let host_up_count++
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update_status "$track_ip" "up"
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[ $score -le $up ] && do_log="success"
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else
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let lost++
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update_status "$track_ip" "down"
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[ $score -gt $up ] && do_log="failed"
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fi
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[ -n "$do_log" ] && LOG info "Check ($track_method) ${do_log} for target \"$track_ip\" on interface $INTERFACE ($DEVICE). Current score: $score"
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else
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if [ "$loss" -ge "$failure_loss" ] || [ "$latency" -ge "$failure_latency" ]; then
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let lost++
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update_status "$track_ip" "down" $latency $loss
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[ $score -gt $up ] && do_log="failed"
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elif [ "$loss" -le "$recovery_loss" ] && [ "$latency" -le "$recovery_latency" ]; then
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let host_up_count++
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update_status "$track_ip" "up" $latency $loss
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[ $score -le $up ] && do_log="success"
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else
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echo "skipped" > $MWAN3TRACK_STATUS_DIR/$INTERFACE/TRACK_${track_ip}
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fi
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[ -n "$do_log" ] && LOG info "Check (${track_method}: latency=${latency}ms loss=${loss}%) ${do_log} for target \"$track_ip\" on interface $INTERFACE ($DEVICE). Current score: $score"
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fi
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else
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echo "skipped" > $MWAN3TRACK_STATUS_DIR/$INTERFACE/TRACK_${track_ip}
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fi
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done
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if [ $host_up_count -lt $reliability ]; then
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let score--
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if [ $score -lt $up ]; then
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score=0
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[ ${keep_failure_interval} -eq 1 ] && sleep_time=$failure_interval
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else
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sleep_time=$failure_interval
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fi
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if [ $score -eq $up ]; then
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disconnected
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score=0
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fi
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else
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if [ $score -lt $((down+up)) ] && [ $lost -gt 0 ]; then
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LOG info "Lost $((lost*count)) ping(s) on interface $INTERFACE ($DEVICE). Current score: $score"
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fi
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let score++
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lost=0
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if [ $score -gt $up ]; then
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echo "online" > $MWAN3TRACK_STATUS_DIR/$INTERFACE/STATUS
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score=$((down+up))
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elif [ $score -le $up ]; then
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sleep_time=$recovery_interval
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fi
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if [ $score -eq $up ]; then
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connected
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fi
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fi
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let turn++
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mkdir -p "$MWAN3TRACK_STATUS_DIR/${1}"
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echo "${lost}" > $MWAN3TRACK_STATUS_DIR/$INTERFACE/LOST
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echo "${score}" > $MWAN3TRACK_STATUS_DIR/$INTERFACE/SCORE
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echo "${turn}" > $MWAN3TRACK_STATUS_DIR/$INTERFACE/TURN
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get_uptime > $MWAN3TRACK_STATUS_DIR/$INTERFACE/TIME
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host_up_count=0
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if [ "${IFDOWN_EVENT}" -eq 0 ] && [ "${IFUP_EVENT}" -eq 0 ]; then
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sleep "${sleep_time}" &
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SLEEP_PID=$!
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wait
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unset SLEEP_PID
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fi
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if [ "${IFDOWN_EVENT}" -eq 1 ]; then
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LOG debug "Register ifdown event on interface ${INTERFACE} (${DEVICE})"
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disabled
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disconnected
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IFDOWN_EVENT=0
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fi
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if [ "${IFUP_EVENT}" -eq 1 ]; then
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LOG debug "Register ifup event on interface ${INTERFACE} (${DEVICE})"
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firstconnect
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IFUP_EVENT=0
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fi
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done
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}
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main "$@"
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