ping & tracert over TCP

偶然发现还有这样的工具: 通过TCP协议实现ping和tracert. 之前一直苦恼无法通过ping的方式测试被q网站, 现在有了这两个工具后就方便了.

[Windows]

tcping: http://www.elifulkerson.com/projects/tcping.php

tracetcp: https://github.com/SimulatedSimian/tracetcp

[Linux]

tcpping: http://xmodulo.com/how-to-install-tcpping-on-linux.html

1. apt-get install tcptraceroute

2. vi tcpping.sh

#!/bin/sh
#
# tcpping: test response times using TCP SYN packets
#          URL: http://www.vdberg.org/~richard/tcpping.html
#
# uses tcptraceroute from http://michael.toren.net/code/tcptraceroute/
#
# (c) - Richard van den Berg <richard@vdberg.org> under the GPL
#               http://www.gnu.org/copyleft/gpl.html
#
# // v1. initial version
# // v1. added -c and -r options
#                 now accepting all other tcptraceroute options
# // v1. removed double quotes around backquotes
# // v1. added -x option, courtesy of Alvin Austin <alvin@crlogic.com>
# // v1. added -C option, courtesy of Norman Rasmussen <norman@rasmussen.org>
# // v1. catch bad destination addresses
# // v1. catch non-root tcptraceroute
# // v1. make -C work when reverse lookup fails, courtesy of Fabrice Le Dorze <Fabrice.LeDorze@apx.fr>

ver="v1.7"
format="%Y%m%d%H%M%S"
d="no"
c="no"
C="no"
ttl=
seq=
q=
r=
w=
topts=""

usage () {
    name=`basename $`
    echo "tcpping $ver Richard van den Berg <richard@vdberg.org>"
    echo
    echo "Usage: $name [-d] [-c] [-C] [-w sec] [-q num] [-x count] ipaddress [port]"
    echo
    echo "        -d   print timestamp before every result"
    echo "        -c   print a columned result line"
    echo "        -C   print in the same format as fping's -C option"
    echo "        -w   wait time in seconds (defaults to 3)"
    echo "        -r   repeat every n seconds (defaults to 1)"
    echo "        -x   repeat n times (defaults to unlimited)"
    echo
    echo "See also: man tcptraceroute"
    echo
}

_checksite() {
    ttr=`tcptraceroute -f ${ttl} -m ${ttl} -q ${q} -w ${w} $* >&`
    if echo "${ttr}" | egrep -i "(bad destination|got roo)" >/dev/null >&; then
        echo "${ttr}"
        exit
    fi
}

_testsite() {
    myseq="${1}"
    shift
    [ "${c}" = "yes" ] && nows=`date +${format}`
    [ "${d}" = "yes" ] && nowd=`date`
    ttr=`tcptraceroute -f ${ttl} -m ${ttl} -q ${q} -w ${w} $* >/dev/null`
    host=`echo "${ttr}" | awk '{print $2 " " $3}'`
    rtt=`echo "${ttr}" | sed 's/.*] //' | awk '{print $1}'`
    not=`echo "${rtt}" | tr -d ".0123456789"`
    [ "${d}" = "yes" ] && echo "$nowd"
    if [ "${c}" = "yes" ]; then
        if [ "x${rtt}" != "x" -a "x${not}" = "x" ]; then
            echo "$myseq $nows $rtt $host"
        else
            echo "$myseq $nows $max $host"
        fi
    elif [ "${C}" = "yes" ]; then
        if [ "$myseq" = "" ]; then
            echo -n "$1 :"
        fi
        if [ "x${rtt}" != "x" -a "x${not}" = "x" ]; then
            echo -n " $rtt"
        else
            echo -n " -"
        fi
        if [ "$x" = "" ]; then
            echo
        fi
    else
        echo "${ttr}" | sed -e "s/^.*\*.*$/seq $myseq: no response (timeout)/" -e "s/^$ttl /seq $myseq: tcp response from/"
    fi
#       echo "${ttr}"
}

while getopts dhq:w:cr:nNFSAEi:f:l:m:p:s:x:C opt ; do
    case "$opt" in
        d|c|C) eval $opt="yes" ;;
        q|w|r|x) eval $opt="$OPTARG" ;;
        n|N|F|S|A|E) topt="$topt -$opt" ;;
        i|l|p|s) topt="$topt -$opt $OPTARG" ;;
        f|m) ttl="$OPTARG" ;;
        ?) usage; exit ;;
    esac
done

shift `expr $OPTIND - `

if [ "x$1" = "x" ]; then
    usage
    exit
fi

max=`echo "${w} * 1000" | bc`

if [ `date +%s` != "%s" ]; then
    format="%s"
fi

_checksite ${topt} $*

if [ "$x" = "" ]; then
    while [  ] ; do
        _testsite ${seq} ${topt} $* &
        pid=$!
        if [ "${C}" = "yes" ]; then
            wait $pid
        fi
        seq=`expr $seq + `
        sleep ${r}
    done
else
    while [ "$x" -gt  ] ; do
        _testsite ${seq} ${topt} $* &
        pid=$!
        if [ "${C}" = "yes" ]; then
            wait $pid
        fi
        seq=`expr $seq + `
        x=`expr $x - `
        if [ "$x" -gt  ]; then
            sleep ${r}
        fi
    done
fi

exit

3. chmod 755 tcpping