#!/bin/bash

AWK="/usr/bin/awk"
CURL="/usr/bin/curl"
CUT="/usr/bin/cut"
ECHO="/bin/echo"
GREP="/bin/grep"
IFCONFIG="/sbin/ifconfig"
SED="/usr/bin/sed"
TR="/usr/bin/tr"

URL="http://www.coffer.com/mac_find/?string="

function get_interfaces {
  INTERFACES=$( ${IFCONFIG} -a | ${GREP} "^eth" | ${AWK} '{print $1}' )
}

function get_vendors {
  for INTERFACE in ${INTERFACES}; do
     MAC=$( ${IFCONFIG} ${INTERFACE} | ${GREP} "HWaddr" | ${AWK} '{print $NF}' )
     VENDOR=$( ${ECHO} "${MAC}" | ${CUT} -d":" -f1-3 )
     HTTPVENDOR=$( ${ECHO} "${VENDOR}" | ${SED} 's/:/%3A/g' )
     LOOKUP=$( ${CURL} "${URL}${HTTPVENDOR}" 2>/dev/null | ${SED} -n '/strong>[ ]*MAC Address/,/<\/pre>/ p' | ${GREP} -v '>' | ${TR} -s ' ' )
     ${ECHO} "Interface: ${INTERFACE}  Vendor: ${LOOKUP}"
  done
}

get_interfaces
get_vendors

exit 0

# ./get_nic_vendor.sh 
Interface: eth0  Vendor:  00144F Sun Microsystems, Inc
Interface: eth1  Vendor:  00144F Sun Microsystems, Inc
Interface: eth2  Vendor:  00144F Sun Microsystems, Inc
Interface: eth3  Vendor:  00144F Sun Microsystems, Inc
# ./get_nic_vendor.sh 
Interface: eth0  Vendor:  009027 intel corporation
# ./get_nic_vendor.sh 
Interface: eth0  Vendor:  000D56 Dell PCBA Test
Interface: eth1  Vendor:  000D56 Dell PCBA Test