#ifndef _NET_IF_H
#define _NET_IF_H

#ifdef __cplusplus
extern "C" {
#endif

#include <features.h>

#define IF_NAMESIZE 16

struct if_nameindex {
  unsigned int if_index;
  char* if_name;
};

unsigned int if_nametoindex(const char*);
char* if_indextoname(unsigned int, char*);
struct if_nameindex* if_nameindex(void);
void if_freenameindex(struct if_nameindex*);

#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)

#include <sys/socket.h>

#define IFF_UP 0x1
#define IFF_BROADCAST 0x2
#define IFF_DEBUG 0x4
#define IFF_LOOPBACK 0x8
#define IFF_POINTOPOINT 0x10
#define IFF_NOTRAILERS 0x20
#define IFF_RUNNING 0x40
#define IFF_NOARP 0x80
#define IFF_PROMISC 0x100
#define IFF_ALLMULTI 0x200
#define IFF_MASTER 0x400
#define IFF_SLAVE 0x800
#define IFF_MULTICAST 0x1000
#define IFF_PORTSEL 0x2000
#define IFF_AUTOMEDIA 0x4000
#define IFF_DYNAMIC 0x8000
#define IFF_LOWER_UP 0x10000
#define IFF_DORMANT 0x20000
#define IFF_ECHO 0x40000
#define IFF_VOLATILE                                                        \
  (IFF_LOOPBACK | IFF_POINTOPOINT | IFF_BROADCAST | IFF_ECHO | IFF_MASTER | \
   IFF_SLAVE | IFF_RUNNING | IFF_LOWER_UP | IFF_DORMANT)

struct ifaddr {
  struct sockaddr ifa_addr;
  union {
    struct sockaddr ifu_broadaddr;
    struct sockaddr ifu_dstaddr;
  } ifa_ifu;
  struct iface* ifa_ifp;
  struct ifaddr* ifa_next;
};

#define ifa_broadaddr ifa_ifu.ifu_broadaddr
#define ifa_dstaddr ifa_ifu.ifu_dstaddr

struct ifmap {
  unsigned long int mem_start;
  unsigned long int mem_end;
  unsigned short int base_addr;
  unsigned char irq;
  unsigned char dma;
  unsigned char port;
};

#define IFHWADDRLEN 6
#define IFNAMSIZ IF_NAMESIZE

struct ifreq {
  union {
    char ifrn_name[IFNAMSIZ];
  } ifr_ifrn;
  union {
    struct sockaddr ifru_addr;
    struct sockaddr ifru_dstaddr;
    struct sockaddr ifru_broadaddr;
    struct sockaddr ifru_netmask;
    struct sockaddr ifru_hwaddr;
    short int ifru_flags;
    int ifru_ivalue;
    int ifru_mtu;
    struct ifmap ifru_map;
    char ifru_slave[IFNAMSIZ];
    char ifru_newname[IFNAMSIZ];
    void* ifru_data;
  } ifr_ifru;
};

#define ifr_name ifr_ifrn.ifrn_name
#define ifr_hwaddr ifr_ifru.ifru_hwaddr
#define ifr_addr ifr_ifru.ifru_addr
#define ifr_dstaddr ifr_ifru.ifru_dstaddr
#define ifr_broadaddr ifr_ifru.ifru_broadaddr
#define ifr_netmask ifr_ifru.ifru_netmask
#define ifr_flags ifr_ifru.ifru_flags
#define ifr_metric ifr_ifru.ifru_ivalue
#define ifr_mtu ifr_ifru.ifru_mtu
#define ifr_map ifr_ifru.ifru_map
#define ifr_slave ifr_ifru.ifru_slave
#define ifr_data ifr_ifru.ifru_data
#define ifr_ifindex ifr_ifru.ifru_ivalue
#define ifr_bandwidth ifr_ifru.ifru_ivalue
#define ifr_qlen ifr_ifru.ifru_ivalue
#define ifr_newname ifr_ifru.ifru_newname
#define _IOT_ifreq _IOT(_IOTS(char), IFNAMSIZ, _IOTS(char), 16, 0, 0)
#define _IOT_ifreq_short _IOT(_IOTS(char), IFNAMSIZ, _IOTS(short), 1, 0, 0)
#define _IOT_ifreq_int _IOT(_IOTS(char), IFNAMSIZ, _IOTS(int), 1, 0, 0)

struct ifconf {
  int ifc_len;
  union {
    void* ifcu_buf;
    struct ifreq* ifcu_req;
  } ifc_ifcu;
};

#define ifc_buf ifc_ifcu.ifcu_buf
#define ifc_req ifc_ifcu.ifcu_req
#define _IOT_ifconf _IOT(_IOTS(struct ifconf), 1, 0, 0, 0, 0)

#endif

#ifdef __cplusplus
}
#endif

#endif