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Message-ID: <51A8CA14.6030506@gmail.com>
Date: Fri, 31 May 2013 18:04:36 +0200
From: Samuraiii <samurai.no.dojo@gmail.com>
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To: gentoo-user <gentoo-user@lists.gentoo.org>
Subject: [gentoo-user] Re: VPN vs LAN address hostname resolution
References: <519CF41B.5040108@gmail.com>
In-Reply-To: <519CF41B.5040108@gmail.com>
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If someone is intrested here is second (undebugged) incarnation of my
hostnames updater script:

#!/bin/sh
#verze 2.0.0_2013-05-31
lock=/var/run/hostnames-updater.pid
shmm="/dev/shm/hosts"

clean () {
    rm $lock
    rm $shmm
}
trap clean SIGHUP SIGINT SIGTERM

/bin/echo $$ > $lock
while /bin/true
    tst(){
    x=0
    if $3 = $(/usr/bin/ssh-keyscan -p $2 $5 2>/dev/null|/bin/sed 's/.*\
ssh-.*\ //g'|/usr/bin/whirpooldeep)
    then
        x=$5
    elif /usr/bin/test $1 -gt 2
    then
        if $3 = $(/usr/bin/ssh-keyscan -p $2 $6 2>/dev/null|/bin/sed
's/.*\ ssh-.*\ //g'|/usr/bin/whirlpooldeep)
        then
            x=$6
        else
            x=$4
        fi
    else
        x=$4
    fi
    }

#host testing line is as folows
#tst <number of addresses to try - some hosts do have wl and eth
interface)> \
#<output of  ssh-keyscan -p <port> <address> 2>/dev/null|/bin/sed 's/.*\
ssh-.*\ //g'|/usr/bin/whirlpooldeep> \
#<fallback address - eg. vpn one> <address 2> <address n>

####################host 1
tst <address count n> <port> <hash> <address 1 > ... <address n> 2>&1
>/dev/null
host1=$x


#lets create hosts file
/bin/echo "# /etc/hosts: Local Host Database
#
# This file describes a number of aliases-to-address mappings for the for
# local hosts that share this file.
#
# In the presence of the domain name service or NIS, this file may not be
# consulted at all; see /etc/host.conf for the resolution order.
#

# IPv4 and IPv6 localhost aliases
127.0.0.1    $(hostname).local $(hostname) localhost
::1        localhost

#
# Imaginary network.
    $host1        host1
#    Last update $(date --rfc-3339)

#
#
# According to RFC 1918, you can use the following IP networks for private
# nets which will never be connected to the Internet:
#
#       10.0.0.0        -   10.255.255.255
#       172.16.0.0      -   172.31.255.255
#       192.168.0.0     -   192.168.255.255
#
# In case you want to be able to connect directly to the Internet (i.e. not
# behind a NAT, ADSL router, etc...), you need real official assigned
# numbers.  Do not try to invent your own network numbers but instead
get one
# from your network provider (if any) or from your regional registry (ARIN,
# APNIC, LACNIC, RIPE NCC, or AfriNIC.)
#
" > $shmm
/bin/mv $shmm /etc/hosts
/usr/bin/sleep 300
done


I hope I helps someone
S

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<html>
  <head>
    <meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
  </head>
  <body bgcolor="#FFFFFF" text="#000066">
    If someone is intrested here is second (undebugged) incarnation of
    my hostnames updater script:<br>
    <br>
    #!/bin/sh<br>
    #verze 2.0.0_2013-05-31<br>
    lock=/var/run/hostnames-updater.pid<br>
    shmm="/dev/shm/hosts"<br>
    <br>
    clean () {<br>
        rm $lock<br>
        rm $shmm<br>
    }<br>
    trap clean SIGHUP SIGINT SIGTERM<br>
    <br>
    /bin/echo $$ &gt; $lock<br>
    while /bin/true<br>
        tst(){<br>
        x=0<br>
        if $3 = $(/usr/bin/ssh-keyscan -p $2 $5 2&gt;/dev/null|/bin/sed
    's/.*\ ssh-.*\ //g'|/usr/bin/whirpooldeep)<br>
        then<br>
            x=$5<br>
        elif /usr/bin/test $1 -gt 2<br>
        then<br>
            if $3 = $(/usr/bin/ssh-keyscan -p $2 $6
    2&gt;/dev/null|/bin/sed 's/.*\ ssh-.*\ //g'|/usr/bin/whirlpooldeep)<br>
            then<br>
                x=$6<br>
            else<br>
                x=$4<br>
            fi<br>
        else<br>
            x=$4<br>
        fi<br>
        }<br>
    <br>
    #host testing line is as folows<br>
    #tst &lt;number of addresses to try - some hosts do have wl and eth
    interface)&gt; \<br>
    #&lt;output of  ssh-keyscan -p &lt;port&gt; &lt;address&gt;
    2&gt;/dev/null|/bin/sed 's/.*\ ssh-.*\
    //g'|/usr/bin/whirlpooldeep&gt; \<br>
    #&lt;fallback address - eg. vpn one&gt; &lt;address 2&gt;
    &lt;address n&gt;<br>
    <br>
    ####################host 1<br>
    tst &lt;address count n&gt; &lt;port&gt; &lt;hash&gt; &lt;address 1
    &gt; ... &lt;address n&gt; 2&gt;&amp;1 &gt;/dev/null<br>
    host1=$x<br>
    <br>
    <br>
    #lets create hosts file<br>
    /bin/echo "# /etc/hosts: Local Host Database<br>
    #<br>
    # This file describes a number of aliases-to-address mappings for
    the for<br>
    # local hosts that share this file.<br>
    #<br>
    # In the presence of the domain name service or NIS, this file may
    not be<br>
    # consulted at all; see /etc/host.conf for the resolution order.<br>
    #<br>
    <br>
    # IPv4 and IPv6 localhost aliases<br>
    127.0.0.1    $(hostname).local $(hostname) localhost<br>
    ::1        localhost<br>
    <br>
    #<br>
    # Imaginary network.<br>
        $host1        host1<br>
    #    Last update $(date --rfc-3339)<br>
    <br>
    #<br>
    #<br>
    # According to RFC 1918, you can use the following IP networks for
    private<br>
    # nets which will never be connected to the Internet:<br>
    #<br>
    #       10.0.0.0        -   10.255.255.255<br>
    #       172.16.0.0      -   172.31.255.255<br>
    #       192.168.0.0     -   192.168.255.255<br>
    #<br>
    # In case you want to be able to connect directly to the Internet
    (i.e. not<br>
    # behind a NAT, ADSL router, etc...), you need real official
    assigned<br>
    # numbers.  Do not try to invent your own network numbers but
    instead get one<br>
    # from your network provider (if any) or from your regional registry
    (ARIN,<br>
    # APNIC, LACNIC, RIPE NCC, or AfriNIC.)<br>
    #<br>
    " &gt; $shmm<br>
    /bin/mv $shmm /etc/hosts<br>
    /usr/bin/sleep 300<br>
    done<br>
    <br>
    <br>
    I hope I helps someone<br>
    S<br>
  </body>
</html>

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