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%%	options

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

%%	module



#include "dk4conf.h"
#include "dk4types.h"
#include "dk4error.h"
#include "dk4mem.h"
#include "dk4sock.h"
#include "dk4str8.h"
#include "dk4mai8dsz.h"



$!trace-include



#if TRACE_DEBUG

static
void
dk4socket_c8_debug_allowed_peer(dk4_allowed_peer_t *peerptr)
{
  FILE *fipo;
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
  unsigned char		*ucptr;
  size_t		 i;
  size_t		 pass;
#endif
  unsigned long ul1, ul2;
  fipo = dktrace_file();

  if (NULL != fipo) {
    switch (peerptr->af) {
      case AF_INET : {
        ul1 = (peerptr->data).ipv4.ad.s_addr;
	ul2 = (peerptr->data).ipv4.ma.s_addr;
	ul1 = dk4socket_ntohl(ul1);
	ul2 = dk4socket_ntohl(ul2);
        fprintf(
	  fipo,
	  "Address/Mask: %lu.%lu.%lu.%lu/%lu.%lu.%lu.%lu\n",
	  ((ul1 >> 24) & 0x000000FFUL),
	  ((ul1 >> 16) & 0x000000FFUL),
	  ((ul1 >>  8) & 0x000000FFUL),
	  ((ul1      ) & 0x000000FFUL),
	  ((ul2 >> 24) & 0x000000FFUL),
	  ((ul2 >> 16) & 0x000000FFUL),
	  ((ul2 >>  8) & 0x000000FFUL),
	  ((ul2      ) & 0x000000FFUL)
	);
      } break;
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
      case AF_INET6 : {
        fputs("Address/Mask: ", fipo);
	for (pass = 0; pass < 2; pass++) {
	  if (0 != pass) {
	    fputc('/', fipo);
	    ucptr = &((peerptr->data).ipv6.ma.s6_addr[0]);
	  } else {
	    ucptr = &((peerptr->data).ipv6.ad.s6_addr[0]);
	  }
	  for (i = 0; i < 16; i++) {
	    if ((0 != i) && (0 == (i % 2))) {
	      fputc(':', fipo);
	    }
	    fprintf(fipo, "%02x", *(ucptr++));
	  }
	}
	fputc('\n', fipo);
      } break;
#endif
    }
  }
}

#endif



int
dk4socket_c8_get_allowed_peer(
  dk4_allowed_peer_t	*peerptr,
  const char		*str,
  dk4_er_t		*erp
)
{
  char		 mycp[128];
  IN_ADDR	 in4;
  IN_ADDR	 ma4;
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
  IN6_ADDR	 in6;
  IN6_ADDR	 ma6;
#endif
  char		*maptr;
  const char	*endptr	= NULL;
  size_t	 bitno	= 0;
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
  size_t	 i	= 0;
#endif
  unsigned long	 nm4	= 0UL;
  int		 back	= DK4_SOCKET_RESULT_FAILED;
  int		 af	= AF_UNSPEC;
  int		 res	= 0;
  $? "+ dk4socket_c8_get_allowed_peer \"%!8s\"", str
  if ((NULL != peerptr) && (NULL != str)) {
    if (0 != dk4str8_cpy_s(mycp, sizeof(mycp), str, erp)) {
      maptr = dk4str8_chr(mycp, '/');
      if (NULL != maptr) { *(maptr++) = '\0'; }
      back = dk4socket_c8_inet_pton( &in4, sizeof(in4), AF_INET, mycp, erp);
      if (DK4_SOCKET_RESULT_SUCCESS == back) { af = AF_INET; }
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
      else {
        back = dk4socket_c8_inet_pton( &in6, sizeof(in6), AF_INET6, mycp, erp);
	if (DK4_SOCKET_RESULT_SUCCESS == back) { af = AF_INET6; }
      }
#endif
      if (DK4_SOCKET_RESULT_SUCCESS == back) {
        back = DK4_SOCKET_RESULT_FAILED;
        if (NULL != maptr) {			$? ". mask"
	  res = dk4ma_input_c8_dec_size_t(&bitno, maptr, &endptr, 1, NULL);
	  if (0 != res) {			$? ". mask by number of bits"
	    /*	Bit number was specified.
	    */
	    switch (af) {
	      case AF_INET : {
		if (0 != dk4socket_mask_bits(&nm4, bitno, erp)) {
		  ma4.s_addr = dk4socket_htonl(nm4);
		  DK4_MEMCPY(&((peerptr->data).ipv4.ad),&in4,sizeof(in4));
		  DK4_MEMCPY(&((peerptr->data).ipv4.ma),&ma4,sizeof(ma4));
		  peerptr->af = af;
	          back = DK4_SOCKET_RESULT_SUCCESS;
		} else {				$? "! out of range"
		}
	      } break;
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
	      case AF_INET6 : {
		back = dk4socket_mask6_bits(&ma6, bitno, erp);
		if (DK4_SOCKET_RESULT_SUCCESS == back) {
		  DK4_MEMCPY(&((peerptr->data).ipv6.ad),&in6,sizeof(in6));
		  DK4_MEMCPY(&((peerptr->data).ipv6.ma),&ma6,sizeof(ma6));
		  peerptr->af = af;
		} else {				$? "! out of range"
		}
	      } break;
#endif
	      default : {
	        /* Must not happen */
	      } break;
	    }
	  } else {				$? ". mask address"
	    /*	Not a bit number, probably an address.
	    */
	    switch (af) {
	      case AF_INET : {
	        back = dk4socket_c8_inet_pton(
		  &ma4, sizeof(ma4), AF_INET, maptr, erp
		);
		if (DK4_SOCKET_RESULT_SUCCESS == back) {
		  DK4_MEMCPY(&((peerptr->data).ipv4.ad),&in4,sizeof(in4));
		  DK4_MEMCPY(&((peerptr->data).ipv4.ma),&ma4,sizeof(ma4));
		  peerptr->af = af;
		} else {				$? "! out of range"
		}
	      } break;
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
	      case AF_INET6 : {
	        back = dk4socket_c8_inet_pton(
		  &ma6, sizeof(ma6), AF_INET6, maptr, erp
		);
		if (DK4_SOCKET_RESULT_SUCCESS == back) {
		  DK4_MEMCPY(&((peerptr->data).ipv6.ad),&in6,sizeof(in6));
		  DK4_MEMCPY(&((peerptr->data).ipv6.ma),&ma6,sizeof(ma6));
		  peerptr->af = af;
		} else {				$? "! out of range"
		}
	      } break;
#endif
	    }
	  }
	} else {					$? ". no mask"
	  /*	Host was specified
	  */
	  switch (af) {
	    case AF_INET : {
	      ma4.s_addr = dk4socket_htonl(0xFFFFFFFFUL);
	      DK4_MEMCPY(&((peerptr->data).ipv4.ad), &in4, sizeof(in4));
	      DK4_MEMCPY(&((peerptr->data).ipv4.ma), &ma4, sizeof(ma4));
	      peerptr->af = af;
	      back = DK4_SOCKET_RESULT_SUCCESS;
	    } break;
#if DK4_HAVE_STRUCT_SOCKADDR_IN6
	    case AF_INET6 : {
	      for (i = 0; i < 16; i++) { ma6.s6_addr[i] = 0xFF; }
	      DK4_MEMCPY(&((peerptr->data).ipv6.ad), &in6, sizeof(in6));
	      DK4_MEMCPY(&((peerptr->data).ipv6.ma), &ma6, sizeof(ma6));
	      peerptr->af = af;
	      back = DK4_SOCKET_RESULT_SUCCESS;
	    } break;
#endif
	    default : {
	      /* Must not happen */
	    } break;
	  }
	}
      } else {					$? "! address invalid"
      }
    } else {					$? "! string too long"
    }
  } else {					$? "! args"
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
#if TRACE_DEBUG
  if (DK4_SOCKET_RESULT_SUCCESS == back) {
    dk4socket_c8_debug_allowed_peer(peerptr);
  }
#endif
  $? "- dk4socket_c8_get_allowed_peer %d", back
  return back;
}