Hi all,
Please tell me the difference between using unsigned short and __be16 to declear a variable in a data structure.
For example, in include/net/inet_sock.h, struct inet_sock is decleared as
struct inet_sock {
__be16 inet_dport;
};
__be16 inet_dport;
};
not
struct inet_sock {
unsigned short inet_dport;
};
unsigned short inet_dport;
};
I think it has something to do with endianness. But I see that both __le16 and __be16 are unsigned short when using gcc with -E option for little-endian and big-endian platform. Can someone give me more information?
* little-endian
typedef unsigned short __u16;
typedef __u16 __le16;
typedef __u16 __be16;
typedef __u16 __le16;
typedef __u16 __be16;
* big-endian
typedef unsigned short __u16;
typedef __u16 __le16;
typedef __u16 __be16;
typedef __u16 __be16;
Regards,
GC
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