Date: Fri, 22 Jul 2011 15:21:29 +0400 From: Vladimir Budnev <vladimir.budnev@gmail.com> To: freebsd-net@freebsd.org Subject: What does define COMMENT_ONLY mean? Message-ID: <CAAvRK942U%2BAiokN0MWQVteeYS5tk%2BdrCOQ_ybRcKZT0gN4Y8WA@mail.gmail.com>
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Hello!
What does this define
COMMENT_ONLY
mean and what for it is used?
Iv met such one in if_arp.h source in freebsd kernel, but cant get such
strange if in arp header structure.
-----------------------------------example
struct arphdr {
<...>
/*
* The remaining fields are variable in size,
* according to the sizes above.
*/
#ifdef COMMENT_ONLY
u_char ar_sha[]; /* sender hardware address */
u_char ar_spa[]; /* sender protocol address */
u_char ar_tha[]; /* target hardware address */
u_char ar_tpa[]; /* target protocol address */
#endif
};
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