diff options
| author | bde <bde@FreeBSD.org> | 1998-07-13 10:44:02 +0000 |
|---|---|---|
| committer | bde <bde@FreeBSD.org> | 1998-07-13 10:44:02 +0000 |
| commit | 1155b43c0527a92ce1d08d76493481fc211600e7 (patch) | |
| tree | 963d32731d65152e89a14e2031da0a0eefde94dc /sys/net/bpf.h | |
| parent | 925110cd2319780c323091d214a7840895264611 (diff) | |
| download | FreeBSD-src-1155b43c0527a92ce1d08d76493481fc211600e7.zip FreeBSD-src-1155b43c0527a92ce1d08d76493481fc211600e7.tar.gz | |
Don't attempt to optimize the space allocated for bpf headers if
sizeof(struct bpf_hdr) > 20. 20 is normal on 32-bit systems with
32-bit alignment, but we still assume that the last 2 bytes of the
struct are unnecessary padding on such systems. On systems with
64-bit longs, struct timeval is bloated to 16 bytes, so bpf headers
certainly don't fit in 18 bytes.
Diffstat (limited to 'sys/net/bpf.h')
| -rw-r--r-- | sys/net/bpf.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sys/net/bpf.h b/sys/net/bpf.h index 7847d72..9bcd100 100644 --- a/sys/net/bpf.h +++ b/sys/net/bpf.h @@ -38,7 +38,7 @@ * @(#)bpf.h 8.1 (Berkeley) 6/10/93 * @(#)bpf.h 1.34 (LBL) 6/16/96 * - * $Id$ + * $Id: bpf.h,v 1.12 1997/02/22 09:40:55 peter Exp $ */ #ifndef _NET_BPF_H_ @@ -128,7 +128,8 @@ struct bpf_hdr { * Only the kernel needs to know about it; applications use bh_hdrlen. */ #ifdef KERNEL -#define SIZEOF_BPF_HDR 18 +#define SIZEOF_BPF_HDR (sizeof(struct bpf_hdr) <= 20 ? 18 : \ + sizeof(struct bpf_hdr)) #endif /* |
