struct inet_sock {
        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;

 

* big-endian

typedef unsigned short __u16;

typedef __u16 __le16;
typedef __u16 __be16;