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Date:      Thu, 22 Jan 2004 17:24:31 +0800
From:      "Laslett, Greg" <greglas@calm.wa.gov.au>
To:        <freebsd-questions@FreeBSD.ORG>
Subject:   Looking for C example of ARP lookup on FreeBSD
Message-ID:  <D6F4DCD16A2E944BBF6B357BD622CB2F01F4387A@calm-kens-10.calm.wa.gov.au>
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Hi,

The code that is being ported uses the 'ioctl' method to request a MAC address.
eg:
    struct arpreq            ReqARP;
    struct sockaddr_in  *pAddr_in;
    SOCKET                 s;
    .
    .
    s = socket(AF_INET, SOCK_DGRAM, 0);
    ioctl(s, SIOCGARP, &ReqARP);
    .
    .

This does not appear to be supported under FreeBSD.  Presumably a sysctl or other mechanism exists.

Can anyone provide a code fragment showing IP4 to MAC address translation.

Thanks,
Greg.

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