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Top Forums Shell Programming and Scripting Need to relate Radius log entries to DHCP ones Post 302267891 by otheus on Sunday 14th of December 2008 12:04:40 PM
Old 12-14-2008
So you need the MAC address and the IP address from the DHCP server??

Use awk or perl to scan in the DHCP file and remember mac/ip's. Then scan in the radius log, matching MACs to the hash-array used in step 1. Print the line from radius log with the extra info:
Code:
#!/usr/bin/perl

# To use: script dhcp.log radius.log

open(DHCP,shift @ARGV) || die "Cannot open DHCP logfile: $!";
open(RADIUS,shift @ARGV) || die "Cannot open RADIUS logfile: $!";

while (<DHCP>) { 
   next unless /DHCPACK on (\S+) to (\S+)/;
   $mac2ip{ lc($2) } = $1;
}

while (<RADIUS>) { 
   next unless /Auth: Login OK:.* cli (\w+)\)/;
   # remove trailing newline
   chomp;
   # grab mac address.
   $mac=lc($1);
   # convert to dhcp-style
   $mac =~ s/(\w\w)(\w\w)/$1:$2/g;
   # lookup ip from previous step
   $ip = exists $mac2ip{ $mac } ? $mac2ip{ $mac } : "UNKNOWN";
   # print original line with ip info
   print $_," $ip\n";
}

Tweaks might be necessary.
 

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ramond.conf(5)							File Formats Manual						    ramond.conf(5)

NAME
ramond.conf - Configuration file for ramond(8) DESCRIPTION
This manual page documents briefly the ramond.conf configuration file. ramond.conf is an XML file containing the rules for Router Advertisement processing by ramond(8). The rules are processed in the order they are defined in the file. SYNTAX
One may refer to the DTD given in /usr/share/doc/ramond/examples/ramond.conf.dtd. The root element, <ramond>, contains one optional attribute, logfile, giving the path to the logfile for the daemon. This element may contain one or more <mac-list>s, and one or more <rule>s. The <mac-list> must have a name attribute, and contains one or more <entry>elements. The <rule> may contain a few attributes : prefix An IPv6 prefix used for matching RA packets mac A <mac-list> name used for matching source MAC addresses of the RA packets lifetime This attribute, when having a "0" value, is used for matching routes that are being cleared interface The interface which the RA packet came from The <rule> may contain : o one or more <execute> elements containing the path of the scripts to run when a packet is matched o a <clear/> element, so that the matched route will be cleared by ramond(8) o or no element, indicating an "ignore" rule. ENVIRONMENT
The environment variables the configured scripts are run with are listed in the ramond(8) manpage. EXAMPLE CONFIGURATION FILE
Set the logfile to be /var/log/ramond.log. <ramond logfile="/var/log/ramond.log"> Define a router mac-list. <mac-list name="router"> <entry>00:11:22:33:44:55</entry> <entry>00:22:44:66:88:00</entry> </mac-list> Define a rule checking if the router routes are being cleared. <rule mac="router" lifetime="0"> <execute>/usr/local/sbin/routenotify route-cleared</execute> </rule> Define a rule ignoring our router announcing routes for prefix 2001:dead:cafe:babe::/52. <rule mac="router" prefix="2001:dead:cafe:babe::/52"> <!-- do nothing --> </rule> Clear the 6to4 routes coming on interface eth0. <rule prefix="2002::/16" interface="eth0"> <execute>/usr/local/sbin/routenotify 6to4-advertised</execute> <clear/> </rule> Match on all advertised prefixes <rule prefix="::/0"> <execute>/usr/local/sbin/routenotify route-advertised</execute> </rule> Match on all RA packets (even those not advertising a prefix) <rule> <execute>/usr/local/sbin/routenotify route-advertised</execute> </rule> </ramond> SEE ALSO
ramond(8), /usr/share/doc/ramond/examples for a sample ramond.conf and a sample processing script AUTHORS
James Morse <morse_@users.sourceforge.net> Wrote the ramond software. Nicolas Dandrimont <nicolas.dandrimont@crans.org> Wrote this manpage for the Debian system. COPYRIGHT
Copyright (C) 2010 Nicolas Dandrimont This manual page was written for the Debian system (and may be used by others). Permission is granted to copy, distribute and/or modify this document under the terms of the usual 3-clause BSD license. On Debian systems, the complete text of the 3-clause BSD license License can be found in /usr/share/doc/ramond/copyright. ramond.conf(5)
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