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%%	options

copyright owner	=	Dirk Krause
copyright year	=	2015-xxxx
license		=	bsd



%%	module

#include "dk4sock.h"
#include "dk4mem.h"
#include "dk4maodd.h"

#if !DK4_HAVE_GETADDRINFO
#include "dk4rec24.h"
#endif

#include "dk4maiddus.h"


$!trace-include



#if DK4_ON_WINDOWS
#if DK4_HAVE_GETADDRINFO

static
dk4_socket_t
dk4socket_wc_tcp_client_addresses(
  const wchar_t		*hostname,
  ADDRINFOW		*raddrst,
  ADDRINFOW		*laddrst,
  long			 secs,
  long			 usecs,
  dk4_er_t		*erp
)
{
  ADDRINFOW		*ra;
  ADDRINFOW		*la;
  dk4_socket_t		 back	= INVALID_SOCKET;
  $? "+ dk4socket_wc_tcp_client_addresses"
  ra = raddrst;
  while ((INVALID_SOCKET == back) && (NULL != ra)) {
    if (NULL != laddrst) {
      la = laddrst;
      while ((INVALID_SOCKET == back) && (NULL != la)) {
        if (la->ai_family == ra->ai_family) {
$? ". remote = %d PTR=%d %lu", (int)(ra->ai_family), TR_IPTR(ra->ai_addr), (unsigned long)(ra->ai_addrlen)
$? ". local  = %d PTR=%d %lu", (int)(la->ai_family), TR_IPTR(la->ai_addr), (unsigned long)(la->ai_addrlen)
$!trace-code dk4socket_debug_address("remote", ra->ai_addr, ra->ai_addrlen);
$!trace-code dk4socket_debug_address("local ", la->ai_addr, la->ai_addrlen);
          back = dk4socket_tcp_client_for_addr(
	    ra->ai_family, ra->ai_addr, ra->ai_addrlen,
	    la->ai_addr, la->ai_addrlen, secs, usecs, erp
	  );
	  if (INVALID_SOCKET != back) {
	    la = NULL; ra = NULL;
	  }
	}
        if (NULL != la) { la = la->ai_next; }
      }
    } else {
      back = dk4socket_tcp_client_for_addr(
        ra->ai_family, ra->ai_addr, ra->ai_addrlen, NULL, 0,
	secs, usecs, erp
      );
      if (INVALID_SOCKET != back) {
        ra = NULL;
      }
    }
    if (NULL != ra) { ra = ra->ai_next; }
  }
  $? "- dk4socket_wc_tcp_client_addresses %d", (int)back
  return back;
}

#else

#endif
#endif



dk4_socket_t
dk4socket_wc_tcp_client_host_num_srv(
  const wchar_t		*hostname,
  const wchar_t		*svcname,
  const wchar_t		*lsvcname,
  long			 secs,
  long			 usecs,
  int			 nsrv,
  dk4_er_t		*erp
)
{
#if DK4_ON_WINDOWS
#if DK4_HAVE_GETADDRINFO
  /* +++++ +getaddrinfo */
  ADDRINFOW		 rhints;
  ADDRINFOW		 lhints;
  ADDRINFOW		*raddrst = NULL;
  ADDRINFOW		*laddrst = NULL;
  dk4_socket_t		 back	= INVALID_SOCKET;
  int			 res;
  $? "+ dk4socket_dk_tcp_client_host_num_srv (getaddrinfo)"
  if ((NULL != hostname) && (NULL != svcname)) {
    DK4_MEMRES(&rhints, sizeof(rhints));
    rhints.ai_family = AF_UNSPEC;
    rhints.ai_socktype = SOCK_STREAM;
    if (0 != nsrv) { rhints.ai_flags = AI_NUMERICSERV; }
    rhints.ai_protocol = 0;
    res = GetAddrInfoW(hostname, svcname, &rhints, &raddrst);
    if ((0 == res) && (NULL != raddrst)) {
      if (NULL != lsvcname) {
         DK4_MEMRES(&lhints, sizeof(lhints));
	 lhints.ai_family = AF_UNSPEC;
	 lhints.ai_socktype = SOCK_STREAM;
	 lhints.ai_flags = AI_PASSIVE;
	 if (0 != nsrv) { lhints.ai_flags |= AI_NUMERICSERV; }
	 lhints.ai_protocol = 0;
	 res = GetAddrInfoW(NULL, lsvcname, &lhints, &laddrst);
	 if ((0 == res) && (NULL != laddrst)) {
	   back = dk4socket_wc_tcp_client_addresses(
	     hostname, raddrst, laddrst, secs, usecs, erp
	   );
	   if (NULL != laddrst) { FreeAddrInfoW(laddrst); }
	 } else {
	   /* ERROR: getaddrinfo failed */
	   dk4error_set_idetails(erp, DK4_E_SOCKET_GETADDRLOC, res);
	 }
      } else {
        back = dk4socket_wc_tcp_client_addresses(
	  hostname, raddrst, NULL, secs, usecs, erp
	);
      }
    } else {
      /* ERROR: getaddrinfo failed */
      dk4error_set_idetails(erp, DK4_E_SOCKET_GETADDRINFO, res);
    }
    if (NULL != laddrst) { FreeAddrInfoW(laddrst); }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  $? "- dk4socket_dk_tcp_client_host_num_srv %d", (int)back
  return back;
  /* ----- +getaddrinfo */
#else
  /* +++++ -getaddrinfo */
  char			 cppt[48];
  char			 cplp[48];
  struct servent	*serv	= NULL;
  const wchar_t		*endptr	= NULL;
  dk4_socket_t		 back	= INVALID_SOCKET;
  int			 res	= 0;
  unsigned short	 rport	= 0U;
  unsigned short	 lport	= 0U;
  unsigned short	 iport	= 0U;
  if ((NULL != hostname) && (NULL != svcname)) {
    res = dk4ma_input_dk_dec_ushort(&rport, svcname, &endptr, 1, erp);
    if (0 == res) {
      if (0 != dk4recode_wchar_t_to_char(cppt, sizeof(cppt), svcname, erp)) {
        dk4socket_error_reset();
	serv = getservbyname(cppt, NULL);
	if (NULL != serv) {
	  iport = serv->s_port;
	  dk4socket_swap_bytes_if_not_bigendian((void *)(&iport),sizeof(iport));
	  rport = (unsigned short)iport;
	} else {
	  dk4socket_error_report(erp, DK4_E_SOCKET_GETSERVBYNAME);
	}
      }
    }
    if (0 != rport) {
      if (NULL != lsvcname) {
        endptr = NULL;
        res = dk4ma_input_dk_dec_ushort(&lport, lsvcname, &endptr, 1, erp);
        if (0 == res) {
          if (0 != dk4recode_wchar_t_to_char(cplp,sizeof(cplp),lsvcname,erp)) {
	    dk4socket_error_reset();
	    serv = getservbyname(cplp, NULL);
	    if (NULL != serv) {
	      iport = serv->s_port;
	      dk4socket_swap_bytes_if_not_bigendian(
	        (void *)(&iport), sizeof(iport)
	      );
	      lport = (unsigned short)iport;
	    } else {
	      dk4socket_error_report(erp, DK4_E_SOCKET_GETSERVBYNAME);
	    }
	  } else {
	    /* ERROR: Text conversion failed, already reported */
	  }
        }
        if (0 != lport) {
          back = dk4socket_wc_tcp_client_host_port(
	    hostname, rport, lport, secs, usecs, erp
	  );
        }
      } else {
        back = dk4socket_wc_tcp_client_host_port(
          hostname, rport, (unsigned short)0, secs, usecs, erp
        );
      }
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
  /* ----- -getaddrinfo */
#endif
#else
  dk4error_set_simple_error_code(erp, DK4_E_NOT_SUPPORTED);
  return (DK4_SOCKET_RESULT_FAILED);
#endif
}



dk4_socket_t
dk4socket_wc_tcp_client_host_srv(
  const wchar_t		*hostname,
  const wchar_t		*svcname,
  const wchar_t		*lsvcname,
  long			 secs,
  long			 usecs,
  dk4_er_t		*erp
)
{
  return (
    dk4socket_wc_tcp_client_host_num_srv(
      hostname, svcname, lsvcname, secs, usecs, 0, erp
    )
  );
}



#if DK4_HAVE_STRUCT_SOCKADDR_IN6
/**	used to initialize IPv6 address for binding local ports.
*/
static const IN6_ADDR dk4sock18_any6 = IN6ADDR_ANY_INIT ;
#endif



dk4_socket_t
dk4socket_wc_tcp_client_host_port(
  const	wchar_t		*hostname,
  unsigned short	 portno,
  unsigned short	 lportno,
  long			 secs,
  long			 usecs,
  dk4_er_t		*erp
)
{
#if DK4_ON_WINDOWS
#if DK4_HAVE_GETADDRINFO
  /* +++++ +getaddrinfo */
  wchar_t		rpnb[16*sizeof(dk4_um_t)];
  wchar_t		lpnb[16*sizeof(dk4_um_t)];
  const size_t		szrpbn = DK4_SIZEOF(rpnb,wchar_t);
  const size_t		szlpnb = DK4_SIZEOF(lpnb,wchar_t);
  dk4_socket_t		back = INVALID_SOCKET;
  int			res;
  $? "+ dk4socket_dk_tcp_client_host_port (getaddrinfo)"
  if ((NULL != hostname) && (0 < portno)) {
    res = dk4ma_write_decimal_unsigned(rpnb, szrpbn, (dk4_um_t)portno, 0, erp);
    if (0 != res) {
      if (0 < lportno) {
        res = dk4ma_write_decimal_unsigned(lpnb,szlpnb,(dk4_um_t)lportno,0,erp);
	if (0 != res) {
	  back = dk4socket_wc_tcp_client_host_num_srv(
	    hostname, rpnb, lpnb, secs, usecs, 1, erp
	  );
	} else {					$? "! bug"
	}
      } else {
        back = dk4socket_wc_tcp_client_host_num_srv(
	  hostname, rpnb, NULL, secs, usecs, 1, erp
	);
      }
    } else {						$? "! bug"
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  $? "- dk4socket_dk_tcp_client_host_port %d", (int)back
  return back;
  /* ----- +getaddrinfo */
#else
  /* +++++ -getaddrinfo */
  char			  hona[1040];
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
  struct sockaddr_in6	  sr6;
  struct sockaddr_in6	  sl6;
#endif
  struct sockaddr_in	  sr4;
  struct sockaddr_in	  sl4;
  char			**addrptr;
  struct hostent	 *hep;
  dk4_socket_t		  back = INVALID_SOCKET;
  $? "+ dk4socket_dk_tcp_client_host_port (no getaddrinfo)"
  if ((NULL != hostname) && (0 < portno)) {		$? ". args ok"
    if (0 != dk4recode_wchar_t_to_char(hona, sizeof(hona), hostname, erp)) {
      dk4socket_error_reset();
      hep = gethostbyname(hona);			$? ". recode ok"
      if (NULL != hep) {				$? ". host found"
        if (NULL != hep->h_addr_list) {			$? ". entries in list"
	  switch (hep->h_addrtype) {
	    case AF_INET : {
	      if (4 == hep->h_length) {
	        addrptr = hep->h_addr_list;
		while ((INVALID_SOCKET == back) && (NULL != *addrptr)) {
		  DK4_MEMRES(&sr4, sizeof(sr4));
		  sr4.sin_family = AF_INET;
		  sr4.sin_port   = dk4socket_htons(portno);
		  DK4_MEMCPY(&(sr4.sin_addr), *addrptr, sizeof(IN_ADDR));
$!trace-code dk4socket_debug_address("remote", (struct sockaddr *)(&sr4), sizeof(sr4));
		  if (0 != lportno) {
		    DK4_MEMRES(&sl4, sizeof(sl4));
		    sl4.sin_family = AF_INET;
		    sl4.sin_port   = dk4socket_htons(lportno);
		    sl4.sin_addr.s_addr = dk4socket_htonl(INADDR_ANY);
$!trace-code dk4socket_debug_address("local ", (struct sockaddr *)(&sl4), sizeof(sl4));
		    back = dk4socket_tcp_client_for_addr(
		      AF_INET, (struct sockaddr *)(&sr4), sizeof(sr4),
		      (struct sockaddr *)(&sl4), sizeof(sl4),
		      secs, usecs, erp
		    );
		  } else {
		    back = dk4socket_tcp_client_for_addr(
		      AF_INET, (struct sockaddr *)(&sr4), sizeof(sr4),
		      NULL, 0, secs, usecs, erp
		    );
		  }
		  addrptr++;
		}
	      } else {					$? "! length"
	        dk4error_set_simple_error_code(erp, DK4_E_BUG);
	      }
	    } break;
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
	    case AF_INET6 : {
	      if (16 == hep->h_length) {
	        addrptr = hep->h_addr_list;
		while ((INVALID_SOCKET == back) && (NULL != *addrptr)) {
		  DK4_MEMRES(&sr6, sizeof(sr6));
		  sr6.sin6_family = AF_INET6;
		  sr6.sin6_port   = dk4socket_htons(portno);
		  DK4_MEMCPY(&(sr6.sin6_addr), *addrptr, sizeof(IN6_ADDR));
		  if (0 != lportno) {
		    DK4_MEMRES(&sl6, sizeof(sl6));
		    sl6.sin6_family = AF_INET6;
		    sl6.sin6_port   = dk4socket_htons(lportno);
		    DK4_MEMCPY(&(sl6.sin6_addr), &dk4sock18_any6, sizeof(IN6_ADDR));
		    back = dk4socket_tcp_client_for_addr(
		      AF_INET6, (struct sockaddr *)(&sr6), sizeof(sr6),
		      (struct sockaddr *)(&sl6), sizeof(sl6),
		      secs, usecs, erp
		    );
		  } else {
		    back = dk4socket_tcp_client_for_addr(
		      AF_INET6, (struct sockaddr *)(&sr6), sizeof(sr6),
		      NULL, 0, secs, usecs, erp
		    );
		  }
		  addrptr++;
		}
	      } else {
	        /* ERROR: Address length mismatch */
		dk4error_set_simple_error_code(erp, DK4_E_BUG);
	      }
	    } break;
#endif
	    default : {
	      /* ERROR: Unknown protocol */
	      dk4error_set_simple_error_code(erp, DK4_E_BUG);
	    } break;
	  }
	} else {					$? "! empty list"
	  /* ERROR: List empty */
	  dk4error_set_simple_error_code(erp, DK4_E_BUG);
	}
      } else {						$? "! gethostbyname"
        /* ERROR: Host not found */
	dk4socket_error_report(erp, DK4_E_SOCKET_GETHOSTBYNAME);
      }
    } else {						$? "! recode"
      /* ERROR: Failed to convert hostname to ASCII, already reported */
    }
  } else {						$? "! args"
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  $? "- dk4socket_dk_tcp_client_host_port %d", (int)back
  return back;
  /* ----- -getaddrinfo */
#endif
#else
  dk4error_set_simple_error_code(erp, DK4_E_NOT_SUPPORTED);
  return (DK4_SOCKET_RESULT_FAILED);
#endif
}