Date: Wed, 13 Aug 2003 08:43:51 -0700 From: Lars Eggert <larse@ISI.EDU> To: Nick Barnes <Nick.Barnes@pobox.com> Cc: freebsd-net@freebsd.org Subject: Re: Translate MAC address to IP address Message-ID: <3F3A5CB7.5070006@isi.edu> In-Reply-To: <65626.1060774393@thrush.ravenbrook.com> References: <65626.1060774393@thrush.ravenbrook.com>
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This is a cryptographically signed message in MIME format. --------------ms070709090404010406080107 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Nick Barnes wrote: > [-net seems to be the right forum for this.] > > I have some MAC addresses from a local Ethernet segment. I want to > convert them into IP addresses. How can I do that programmatically? net/arping from port: [root@nik: ~] arping -i em1 00:07:e9:0a:23:91 ARPING 00:07:e9:0a:23:91 60 bytes from 128.9.168.57 (00:07:e9:0a:23:91): icmp_seq=0 time=5.453 msec 60 bytes from 128.9.168.57 (00:07:e9:0a:23:91): icmp_seq=1 time=9.980 msec 60 bytes from 128.9.168.57 (00:07:e9:0a:23:91): icmp_seq=2 time=9.981 msec ^C --- 00:07:e9:0a:23:91 statistics --- 3 packets transmitted, 3 packets received, 0% unanswered Lars -- Lars Eggert <larse@isi.edu> USC Information Sciences Institute --------------ms070709090404010406080107 Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIJtjCC AzgwggKhoAMCAQICEGZFcrfMdPXPY3ZFhNAukQEwDQYJKoZIhvcNAQEEBQAwgdExCzAJBgNV BAYTAlpBMRUwEwYDVQQIEwxXZXN0ZXJuIENhcGUxEjAQBgNVBAcTCUNhcGUgVG93bjEaMBgG 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