regular expression for MAC address validation


 
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# 1  
Old 03-08-2007
regular expression for MAC address validation

Hi there

I am running a script which requires the input of a MAC address from the user and was loooking for a regex that will verify the user has inputted a full 12 digit valid MAC with colons

Ive seen a few on some sites that look huge and was wondering if anybody had a one liner (or as close as possible)

Any help would be greatly appreciated
Gary
# 2  
Old 03-08-2007
Code:
echo 00:60:08:C4:99:AA | sed "/^\([0-9A-Z][0-9A-Z]:\)\{5\}[0-9A-Z][0-9A-Z]$/p"

# 3  
Old 03-08-2007
Quote:
Originally Posted by anbu23
Code:
echo 00:60:08:C4:99:AA | sed "/^\([0-9A-Z][0-9A-Z]:\)\{5\}[0-9A-Z][0-9A-Z]$/p"

I suppose the default output should be supressed,
Code:
echo 00:60:08:C4:99:AA | sed -n "/^\([0-9A-Z][0-9A-Z]:\)\{5\}[0-9A-Z][0-9A-Z]$/p"

# 4  
Old 03-08-2007
Quote:
Originally Posted by matrixmadhan
I suppose the default output should be supressed,
Code:
echo 00:60:08:C4:99:AA | sed -n "/^\([0-9A-Z][0-9A-Z]:\)\{5\}[0-9A-Z][0-9A-Z]$/p"

You are right. I forgot to add that option.
# 5  
Old 03-08-2007
thats fantastic, I dont suppose you have one for IP addresses too do you ??
# 6  
Old 03-08-2007
Code:
#! /opt/third-party/bin/perl

my $ip = "a10.2.45.23";

if( $ip =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/ ) {
  print "Match\n";
}
else {
  print "No Match\n";
}

exit 0

Not extensive though! Smilie
# 7  
Old 03-08-2007
Quote:
Originally Posted by hcclnoodles
thats fantastic, I dont suppose you have one for IP addresses too do you ??
Code:
echo 190.04.50.00 | awk -F"\." ' $0 ~ /^([0-9]{1,3}\.){3}[0-9]{1,3}$/ && $1 <=255 && $2 <= 255 && $3 <= 255 && $4 <= 255 '

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