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[NET]: Annotate h_proto in struct ethhdr

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The protocol field in ethernet headers is big-endian and should be
annotated as such.  This patch allows detection of missing ntohs() calls
on the ethernet protocol field when sparse is run with __CHECK_ENDIAN__
defined.

This is a revised version that includes <linux/types.h> so that the
userspace programs are not confused by __be16.  Thanks to David S.
Miller.

Signed-off-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Roskin 2005-11-10 13:03:08 -08:00 • committed by David S. Miller
parent fb286bb299
commit ac57d04267
1 changed files with 3 additions and 1 deletions
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4
include/linux/if_ether.h
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@ -21,6 +21,8 @@
#ifndef _LINUX_IF_ETHER_H #ifndef _LINUX_IF_ETHER_H
#define _LINUX_IF_ETHER_H #define _LINUX_IF_ETHER_H
#include <linux/types.h>
/* /*
* IEEE 802.3 Ethernet magic constants. The frame sizes omit the preamble * IEEE 802.3 Ethernet magic constants. The frame sizes omit the preamble
* and FCS/CRC (frame check sequence). * and FCS/CRC (frame check sequence).
@ -100,7 +102,7 @@
struct ethhdr { struct ethhdr {
unsigned char h_dest[ETH_ALEN]; /* destination eth addr */ unsigned char h_dest[ETH_ALEN]; /* destination eth addr */
unsigned char h_source[ETH_ALEN]; /* source ether addr */ unsigned char h_source[ETH_ALEN]; /* source ether addr */
unsigned short h_proto; /* packet type ID field */ __be16 h_proto; /* packet type ID field */
} __attribute__((packed)); } __attribute__((packed));
#ifdef __KERNEL__ #ifdef __KERNEL__