in.h

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#pragma once

#include <stdint.h>
#include <sys/socket.h>

#define INADDR_ANY      0x00000000
#define INADDR_BROADCAST    0xFFFFFFFF
#define INADDR_NONE     0xFFFFFFFF

#define INET_ADDRSTRLEN     16

//#define IPPROTO_IP        ???
//#define IPPROTO_TCP       ???
//#define IPPROTO_UDP       ???

typedef uint16_t in_port_t;
typedef uint32_t in_addr_t;

struct in_addr {
    in_addr_t   s_addr;
};

struct sockaddr_in {
    sa_family_t sin_family;
    in_port_t   sin_port;
    struct in_addr  sin_addr;
    unsigned char   sin_zero[8];
};