66 lines
2.5 KiB
Bash
Executable file
66 lines
2.5 KiB
Bash
Executable file
#!/bin/sh
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# SPDX-FileCopyrightText: 2024 Splunk, Inc.
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# SPDX-License-Identifier: Apache-2.0
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# a similar effect can be accomplished with: "nc -z 127.0.0.1 1-32768", and "nc -zu 127.0.0.1 1-32768"
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# shellcheck disable=SC1091
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. "$(dirname "$0")"/common.sh
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HEADER='Proto Port'
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HEADERIZE="BEGIN {print \"$HEADER\"}"
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PRINTF='{printf "%-5s %5d\n", proto, port}'
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# shellcheck disable=SC2016
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FILTER_INACTIVE='($NF ~ /^CLOSE/) {next}'
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if [ "$KERNEL" = "Linux" ] ; then
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queryHaveCommand ss
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FOUND_SS=$?
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if [ $FOUND_SS -eq 0 ] ; then
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CMD='eval ss -lnut | egrep "^tcp|^udp"'
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# shellcheck disable=SC2016
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FORMAT='{proto=$1; sub("^.*:", "", $5); port=$5}'
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else
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CMD='eval netstat -ln | egrep "^tcp|^udp"'
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# shellcheck disable=SC2016
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FORMAT='{proto=$1; sub("^.*:", "", $4); port=$4}'
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fi
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elif [ "$KERNEL" = "SunOS" ] ; then
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CMD='netstat -an -f inet -f inet6'
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FIGURE_SECTION='BEGIN {inUDP=1;inTCP=0} /^TCP: IPv/ {inUDP=0;inTCP=1} /^SCTP:/ {exit}'
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FILTER='/: IPv|Local Address|^$|^-----/ {next} (! port) {next}'
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# shellcheck disable=SC2016
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FORMAT='{if (inUDP) proto="udp"; if (inTCP) proto="tcp"; sub("^.*[^0-9]", "", $1); port=$1}'
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elif [ "$KERNEL" = "AIX" ] ; then
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CMD='eval netstat -an | egrep "^tcp|^udp"'
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HEADERIZE="BEGIN {print \"$HEADER\"}"
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# shellcheck disable=SC2016
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FORMAT='{gsub("[46]", "", $1); proto=$1; sub("^.*[^0-9]", "", $4); port=$4}'
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# shellcheck disable=SC2016
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FILTER='{if ($4 == "") next}'
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elif [ "$KERNEL" = "Darwin" ] ; then
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CMD='eval netstat -ln | egrep "^tcp|^udp"'
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HEADERIZE="BEGIN {print \"$HEADER\"}"
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# shellcheck disable=SC2016
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FORMAT='{gsub("[46]", "", $1); proto=$1; sub("^.*[^0-9]", "", $4); port=$4}'
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# shellcheck disable=SC2016
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FILTER='{if ($4 == "") next}'
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elif [ "$KERNEL" = "HP-UX" ] ; then
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CMD='eval netstat -an | egrep "^tcp|^udp"'
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HEADERIZE="BEGIN {print \"$HEADER\"}"
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# shellcheck disable=SC2016
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FORMAT='{gsub("[46]", "", $1); proto=$1; sub("^.*[^0-9]", "", $4); port=$4}'
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# shellcheck disable=SC2016
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FILTER='{if ($4 == "") next}'
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elif [ "$KERNEL" = "FreeBSD" ] ; then
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# shellcheck disable=SC2089
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CMD='eval netstat -ln | egrep "^tcp|^udp"'
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HEADERIZE="BEGIN {print \"$HEADER\"}"
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# shellcheck disable=SC2016
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FORMAT='{gsub("[46]", "", $1); proto=$1; sub("^.*[^0-9]", "", $4); port=$4}'
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fi
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assertHaveCommand "$CMD"
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# shellcheck disable=SC2090
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$CMD | tee "$TEE_DEST" | $AWK "$HEADERIZE $FIGURE_SECTION $FORMAT $FILTER $FILTER_INACTIVE $PRINTF" header="$HEADER"
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echo "Cmd = [$CMD]; | $AWK '$HEADERIZE $FIGURE_SECTION $FORMAT $FILTER $FILTER_INACTIVE $PRINTF' header=\"$HEADER\"" >> "$TEE_DEST"
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