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%%	options

copyright owner	=	Dirk Krause
copyright year	=	2016-xxxx
SPDX-License-Identifier:	BSD-3-Clause



%%	module

#include "dk4conf.h"
#include "dk4types.h"
#include "dk4mem.h"
#include "dk4sock.h"
#include "dk4mai8dus.h"
#include "dk4mao8d.h"

#if DK4_HAVE_ASSERT_H
#ifndef	ASSERT_H_INCLUDED
#include <assert.h>
#define	ASSERT_H_INCLUDED 1
#endif
#endif


$!trace-include



#if DK4_HAVE_STRUCT_SOCKADDR_IN6
/**	used to initialize IPv6 address for binding local ports.
*/
static const IN6_ADDR dk4socket_any6 = IN6ADDR_ANY_INIT;
#endif



int
dk4socket_address_family(dk4_sockaddr_storage_t *aptr)
{
  struct sockaddr	*sa	= NULL;
  int			 back	= AF_UNSPEC;
#if	DK4_USE_ASSERT
  assert(NULL != aptr);
#endif
  if (NULL != aptr) {
    sa = (struct sockaddr *)aptr;
    switch (sa->sa_family) {
      case AF_INET :
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
      case AF_INET6 :
#endif
      {
        back = sa->sa_family;
      } break;
    }
  }
  return back;
}


size_t
dk4socket_address_size(dk4_sockaddr_storage_t *aptr)
{
  struct sockaddr	*sa;
  size_t		 back	= 0;
#if	DK4_USE_ASSERT
  assert(NULL != aptr);
#endif
  if (NULL != aptr) {
    sa = (struct sockaddr *)aptr;
    switch (sa->sa_family) {
      case AF_INET : {
        back = sizeof(struct sockaddr_in);
      } break;
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
      case AF_INET6 : {
        back = sizeof(struct sockaddr_in6);
      } break;
#endif
    }
  }
  return back;
}



int
dk4socket_complete_addresses(
  dk4_sockaddr_storage_t	*array,
  unsigned short		 remport,
  unsigned short		 locport
)
{
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
  struct sockaddr_in6	*sa6;
#endif
  struct sockaddr_in	*sa4;
  struct sockaddr	*sa;
  int			 back	= DK4_SOCKET_RESULT_FAILED;
  $? "+ dk4socket_complete_addresses"
#if	DK4_USE_ASSERT
  assert(NULL != array);
#endif
  sa = (struct sockaddr *)array;
  switch (sa->sa_family) {
    case AF_INET : {				$? ". IPv4"
      sa4 = (struct sockaddr_in *)array;
      sa4->sin_port = dk4socket_htons(remport);
      sa4 = (struct sockaddr_in *)(&(array[1]));
      sa4->sin_family = AF_INET;
      sa4->sin_addr.s_addr = dk4socket_htonl(INADDR_ANY);
      sa4->sin_port = dk4socket_htons(locport);
      back = DK4_SOCKET_RESULT_SUCCESS;
    } break;
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
    case AF_INET6 : {				$? ". IPv6"
      sa6 = (struct sockaddr_in6 *)array;
      sa6->sin6_port = dk4socket_htons(remport);
      sa6 = (struct sockaddr_in6 *)(&(array[1]));
      sa6->sin6_family = AF_INET6;
      DK4_MEMCPY(&(sa6->sin6_addr), &dk4socket_any6, sizeof(IN6_ADDR));
      sa6->sin6_port = dk4socket_htons(locport);
      back = DK4_SOCKET_RESULT_SUCCESS;
    } break;
#endif
  }
  $? "- dk4socket_complete_addresses %d", back
  return back;
}