60 lines
994 B
Bash
Executable file
60 lines
994 B
Bash
Executable file
#!/bin/bash
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HOST=$1
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PORT=$2
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usage () {
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echo "Usage:"
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echo " $0 host [port]"
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echo " port defaults to 22 (ssh)"
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exit 1
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}
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print_not_reachable () {
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if [ "$NOT_REACHABLE" = "1" ] ; then
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echo -n .
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else
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echo -n $HOST:$PORT is not reachable
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NOT_REACHABLE=1
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fi
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}
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print_up_but_port_closed () {
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if [ "$PORT_CLOSED" = "1" ] ; then
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echo -n .
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else
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echo -n $HOST is up but port $PORT is closed
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PORT_CLOSED=1
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fi
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}
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port_is_open () {
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# If tcptraceroute stops working use:
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# echo | nc -w 2 $HOST $PORT || failed
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OUT=$(tcptraceroute -f 255 -m 255 -q 1 -w 1 $HOST $PORT 2>&1)
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if echo "$OUT" | grep 'Destination not reached' >/dev/null ; then
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print_not_reachable
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OPEN=no
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elif echo "$OUT" | grep '\[closed\]' >/dev/null ; then
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print_up_but_port_closed
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sleep 1
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OPEN=no
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else
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OPEN=yes
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fi
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}
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if [ -z "$HOST" ] ; then
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usage
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fi
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if [ -z "$PORT" ] ; then
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PORT=22
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fi
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port_is_open
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while [ "$OPEN" = "no" ] ; do
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port_is_open
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done
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echo
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