Network Macros
The macros in the sample network_macros.cfg configuration file below deal with network matters such as host-address conversions, subnets, DNS, etc.
///////////////////////////////////////////////////////////////////////////////
// networking macros
///////////////////////////////////////////////////////////////////////////////
addr2host(A) // for the given ipaddr (A), return the associated host (as
// resolved by nslookup)
// (A) is the ipaddr (e.g., 123.111.222.111)
$trim($command("=nslookup -sil (A) 2>/dev/null |
=egrep -i '^name:' | =awk '{print \$NF}'"))
///////////////////////////////////////////////////////////////////////////////
nsname(H) // for host (H), return the Name: field from nslookup
$trim($command("=nslookup -sil (H) 2>/dev/null |
=egrep -i '^name:' | =awk '{print \$NF}'"))
nsaddr(H) // for host (H), return the Address: field from nslookup
$trim($command("=nslookup -sil (H) 2>/dev/null | =tail -n +4 |
=egrep -i '^address:' | =awk '{print \$NF}'"))
///////////////////////////////////////////////////////////////////////////////
fqdn(H) // for host (H), return the FQDN (fully qualified domain name);
// if =nsname() (nslookup) results are nil, return (H)
$if(#length(=nsname((H))), =nsname((H)), "(H)")
///////////////////////////////////////////////////////////////////////////////
host2addr(H) // for the given host (H), return the associated addr (as
// resolved by nslookup)
// (H) is the host (e.g., hamburg.uppity.edu)
$trim($command("=nslookup -sil (H) 2>/dev/null |
=grep '^Address:' | =tail -n +2 | =awk '{print \$NF}'"))
///////////////////////////////////////////////////////////////////////////////
resolveipaddr(L)
// for line (L), resolve any ipaddr to hostname
if (L) =~ "(.+)[[:space:]]([[:digit:]]{1,3}\\.[[:digit:]]{1,3}\\.
[[:digit:]]{1,3}\\.[[:digit:]]{1,3})(.*)"
set (L) = "$1 $2 [" . =addr2host($2) . "]" . $3
endif
///////////////////////////////////////////////////////////////////////////////
subnets 10.1.0
10.1.1
10.1.2
10.2.0
10.2.1
10.2.253
10.2.254
[...]
rpcprgnum 836129415
rpcprtnum
#if rouen
935
#elsif cadiz | stockholm
159
#else
638
#endif
ip_address_piktmaster // the ip addr, in dotted decimal, of the master
// control machine
123.111.222.101
ethernet_address_piktmaster 11:22:33:dd:ee:ff
ip_address_local_domains // the ip addrs, in dotted decimal, of our
// local domains
123.111.130|123.101.202|123.111.135|123.100.200
ip_address_sysadmins 123.111.222.102 // hamburg
123.111.222.103 // cadiz
123.111.222.104 // trondheim
// in our files/hosts_deny_files.cfg, for the file /etc/hosts.deny, we might
// have something like:
//
// #if vienna
// ALL : ALL EXCEPT 111.222.100.200 =ip_address_sysadmins
//
// ...
//
// we might have something similar in our files/hosts_allow_files.cfg;
// we might also use =ip_address_sysadmins when monitoring access logs,
// filtering out the connects from =ip_address_sysadmins, and reporting
// all the rest
///////////////////////////////////////////////////////////////////////////////
ntpserver 123.222.111.222
///////////////////////////////////////////////////////////////////////////////
// dns stuff
nameddir /var/lib/named
zondir =nameddir/master
zonttl $TTL 3600
namedfiles
db.earlymusicradio.com
db.earlymusicradio.net
db.earlymusicradio.org
db.earlymusicchicago.com
db.earlymusicchicago.org
db.earlymusichicago.com
db.earlymusichicago.org
db.pikt.net
db.pikt.org
///////////////////////////////////////////////////////////////////////////////
For more examples, see Samples.
