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From: Hadi Rezaee <h.rezaee@ideatech.io>
Subject: ethernet header size
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Date: Sat, 9 Jan 2016 02:33:53 +0330
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Hello there,

In some part of my application I need to have the Ethernet header size
(ideally, using sizeof).
Well I guess 'ethhdr' is not exist on FreeBSD, correct ?

According to Linux definition:
 
struct ethhdr {
    unsigned char    h_dest[ETH_ALEN];
    unsigned char    h_source[ETH_ALEN];
    unsigned short    h_proto;
} __attribute__((packed));

So, assume the ethernet header size is equal to 14, is it going to work
?! :)
and if there is already a definition somewhere in system header files,
so I don't have to define the size myself ?

Thank you