include "netinet/in"

ffi.cdef [[
extern int *__h_errno_location (void) __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__const__));
extern void herror (__const char *__str) __attribute__ ((__nothrow__ , __leaf__));
extern __const char *hstrerror (int __err_num) __attribute__ ((__nothrow__ , __leaf__));
struct hostent
{
  char *h_name;
  char **h_aliases;
  int h_addrtype;
  int h_length;
  char **h_addr_list;
};
extern void sethostent (int __stay_open);
extern void endhostent (void);
extern struct hostent *gethostent (void);
extern struct hostent *gethostbyaddr (__const void *__addr, __socklen_t __len,
          int __type);
extern struct hostent *gethostbyname (__const char *__name);
extern struct hostent *gethostbyname2 (__const char *__name, int __af);
extern int gethostent_r (struct hostent *__restrict __result_buf,
    char *__restrict __buf, size_t __buflen,
    struct hostent **__restrict __result,
    int *__restrict __h_errnop);
extern int gethostbyaddr_r (__const void *__restrict __addr, __socklen_t __len,
       int __type,
       struct hostent *__restrict __result_buf,
       char *__restrict __buf, size_t __buflen,
       struct hostent **__restrict __result,
       int *__restrict __h_errnop);
extern int gethostbyname_r (__const char *__restrict __name,
       struct hostent *__restrict __result_buf,
       char *__restrict __buf, size_t __buflen,
       struct hostent **__restrict __result,
       int *__restrict __h_errnop);
extern int gethostbyname2_r (__const char *__restrict __name, int __af,
        struct hostent *__restrict __result_buf,
        char *__restrict __buf, size_t __buflen,
        struct hostent **__restrict __result,
        int *__restrict __h_errnop);
extern void setnetent (int __stay_open);
extern void endnetent (void);
extern struct netent *getnetent (void);
extern struct netent *getnetbyaddr (uint32_t __net, int __type);
extern struct netent *getnetbyname (__const char *__name);
extern int getnetent_r (struct netent *__restrict __result_buf,
   char *__restrict __buf, size_t __buflen,
   struct netent **__restrict __result,
   int *__restrict __h_errnop);
extern int getnetbyaddr_r (uint32_t __net, int __type,
      struct netent *__restrict __result_buf,
      char *__restrict __buf, size_t __buflen,
      struct netent **__restrict __result,
      int *__restrict __h_errnop);
extern int getnetbyname_r (__const char *__restrict __name,
      struct netent *__restrict __result_buf,
      char *__restrict __buf, size_t __buflen,
      struct netent **__restrict __result,
      int *__restrict __h_errnop);
struct servent
{
  char *s_name;
  char **s_aliases;
  int s_port;
  char *s_proto;
};
extern void setservent (int __stay_open);
extern void endservent (void);
extern struct servent *getservent (void);
extern struct servent *getservbyname (__const char *__name,
          __const char *__proto);
extern struct servent *getservbyport (int __port, __const char *__proto);
extern int getservent_r (struct servent *__restrict __result_buf,
    char *__restrict __buf, size_t __buflen,
    struct servent **__restrict __result);
extern int getservbyname_r (__const char *__restrict __name,
       __const char *__restrict __proto,
       struct servent *__restrict __result_buf,
       char *__restrict __buf, size_t __buflen,
       struct servent **__restrict __result);
extern int getservbyport_r (int __port, __const char *__restrict __proto,
       struct servent *__restrict __result_buf,
       char *__restrict __buf, size_t __buflen,
       struct servent **__restrict __result);
struct protoent
{
  char *p_name;
  char **p_aliases;
  int p_proto;
};
extern void setprotoent (int __stay_open);
extern void endprotoent (void);
extern struct protoent *getprotoent (void);
extern struct protoent *getprotobyname (__const char *__name);
extern struct protoent *getprotobynumber (int __proto);
extern int getprotoent_r (struct protoent *__restrict __result_buf,
     char *__restrict __buf, size_t __buflen,
     struct protoent **__restrict __result);
extern int getprotobyname_r (__const char *__restrict __name,
        struct protoent *__restrict __result_buf,
        char *__restrict __buf, size_t __buflen,
        struct protoent **__restrict __result);
extern int getprotobynumber_r (int __proto,
          struct protoent *__restrict __result_buf,
          char *__restrict __buf, size_t __buflen,
          struct protoent **__restrict __result);
extern int setnetgrent (__const char *__netgroup);
extern void endnetgrent (void);
extern int getnetgrent (char **__restrict __hostp,
   char **__restrict __userp,
   char **__restrict __domainp);
extern int innetgr (__const char *__netgroup, __const char *__host,
      __const char *__user, __const char *__domain);
extern int getnetgrent_r (char **__restrict __hostp,
     char **__restrict __userp,
     char **__restrict __domainp,
     char *__restrict __buffer, size_t __buflen);
extern int rcmd (char **__restrict __ahost, unsigned short int __rport,
   __const char *__restrict __locuser,
   __const char *__restrict __remuser,
   __const char *__restrict __cmd, int *__restrict __fd2p);
extern int rcmd_af (char **__restrict __ahost, unsigned short int __rport,
      __const char *__restrict __locuser,
      __const char *__restrict __remuser,
      __const char *__restrict __cmd, int *__restrict __fd2p,
      sa_family_t __af);
extern int rexec (char **__restrict __ahost, int __rport,
    __const char *__restrict __name,
    __const char *__restrict __pass,
    __const char *__restrict __cmd, int *__restrict __fd2p);
extern int rexec_af (char **__restrict __ahost, int __rport,
       __const char *__restrict __name,
       __const char *__restrict __pass,
       __const char *__restrict __cmd, int *__restrict __fd2p,
       sa_family_t __af);
extern int ruserok (__const char *__rhost, int __suser,
      __const char *__remuser, __const char *__locuser);
extern int ruserok_af (__const char *__rhost, int __suser,
         __const char *__remuser, __const char *__locuser,
         sa_family_t __af);
extern int iruserok (uint32_t __raddr, int __suser,
       __const char *__remuser, __const char *__locuser);
extern int iruserok_af (__const void *__raddr, int __suser,
   __const char *__remuser, __const char *__locuser,
   sa_family_t __af);
extern int rresvport (int *__alport);
extern int rresvport_af (int *__alport, sa_family_t __af);
struct addrinfo
{
  int ai_flags;
  int ai_family;
  int ai_socktype;
  int ai_protocol;
  socklen_t ai_addrlen;
  struct sockaddr *ai_addr;
  char *ai_canonname;
  struct addrinfo *ai_next;
};
struct gaicb
{
  const char *ar_name;
  const char *ar_service;
  const struct addrinfo *ar_request;
  struct addrinfo *ar_result;
  int __return;
  int __unused[5];
};
extern int getaddrinfo (__const char *__restrict __name,
   __const char *__restrict __service,
   __const struct addrinfo *__restrict __req,
   struct addrinfo **__restrict __pai);
extern void freeaddrinfo (struct addrinfo *__ai) __attribute__ ((__nothrow__ , __leaf__));
extern __const char *gai_strerror (int __ecode) __attribute__ ((__nothrow__ , __leaf__));
extern int getnameinfo (__const struct sockaddr *__restrict __sa,
   socklen_t __salen, char *__restrict __host,
   socklen_t __hostlen, char *__restrict __serv,
   socklen_t __servlen, int __flags);
extern int getaddrinfo_a (int __mode, struct gaicb *__list[__restrict],
     int __ent, struct sigevent *__restrict __sig);
extern int gai_suspend (__const struct gaicb *__const __list[], int __ent,
   __const struct timespec *__timeout);
extern int gai_error (struct gaicb *__req) __attribute__ ((__nothrow__ , __leaf__));
extern int gai_cancel (struct gaicb *__gaicbp) __attribute__ ((__nothrow__ , __leaf__));
]]

GAI_WAIT   = 0
GAI_NOWAIT = 1

AI_PASSIVE                  = 0x0001 -- Socket address is intended for `bind'.
AI_CANONNAME                = 0x0002 -- Request for canonical name.
AI_NUMERICHOST              = 0x0004 -- Don't use name resolution.
AI_V4MAPPED                 = 0x0008 -- IPv4 mapped addresses are acceptable.
AI_ALL                      = 0x0010 -- Return IPv4 mapped and IPv6 addresses.
AI_ADDRCONFIG               = 0x0020 -- Use configuration of this host to choose returned address type..
AI_IDN                      = 0x0040 -- IDN encode input (assuming it is encoded in the current locale's character set) before looking it up.
AI_CANONIDN                 = 0x0080 -- Translate canonical name from IDN format.
AI_IDN_ALLOW_UNASSIGNED     = 0x0100 -- Don't reject unassigned Unicode code points.
AI_IDN_USE_STD3_ASCII_RULES = 0x0200 -- Validate strings according to STD3 rules.
AI_NUMERICSERV              = 0x0400 -- Don't use name resolution.

EAI_BADFLAGS    = -1 -- Invalid value for `ai_flags' field.
EAI_NONAME      = -2 -- NAME or SERVICE is unknown.
EAI_AGAIN       = -3 -- Temporary failure in name resolution.
EAI_FAIL        = -4 -- Non-recoverable failure in name res.
EAI_FAMILY      = -6 -- `ai_family' not supported.
EAI_SOCKTYPE    = -7 -- `ai_socktype' not supported.
EAI_SERVICE     = -8 -- SERVICE not supported for `ai_socktype'.
EAI_MEMORY      = -10 -- Memory allocation failure.
EAI_SYSTEM      = -11 -- System error returned in `errno'.
EAI_OVERFLOW    = -12 -- Argument buffer overflow.
EAI_NODATA      = -5 -- No address associated with NAME.
EAI_ADDRFAMILY  = -9 -- Address family for NAME not supported.
EAI_INPROGRESS  = -100 -- Processing request in progress.
EAI_CANCELED    = -101 -- Request canceled.
EAI_NOTCANCELED = -102 -- Request not canceled.
EAI_ALLDONE     = -103 -- All requests done.
EAI_INTR        = -104 -- Interrupted by a signal.
EAI_IDN_ENCODE  = -105 -- IDN encoding failed.

NI_MAXSERV = 32
NI_MAXHOST = 1025

NI_NUMERICHOST = 1
NI_NUMERICSERV = 2
NI_NOFQDN      = 4
NI_NAMEREQD    = 8
NI_DGRAM       = 16