/*	$OpenBSD: res_comp.c,v 1.20 2016/05/01 15:17:29 millert Exp $	*/

/*

 * ++Copyright++ 1985, 1993

 * -

 * Copyright (c) 1985, 1993

 *    The Regents of the University of California.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 * -

 * Portions Copyright (c) 1993 by Digital Equipment Corporation.

 *

 * Permission to use, copy, modify, and distribute this software for any

 * purpose with or without fee is hereby granted, provided that the above

 * copyright notice and this permission notice appear in all copies, and that

 * the name of Digital Equipment Corporation not be used in advertising or

 * publicity pertaining to distribution of the document or software without

 * specific, written prior permission.

 *

 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL

 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT

 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL

 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR

 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS

 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS

 * SOFTWARE.

 * -

 * --Copyright--

 */

#include <sys/types.h>

#include <netinet/in.h>

#include <arpa/nameser.h>

#include <stdio.h>

#include <resolv.h>

#include <ctype.h>

#include <unistd.h>

#include <limits.h>

#include <string.h>

static int dn_find(u_char *, u_char *, u_char **, u_char **);

/*

 * Expand compressed domain name 'comp_dn' to full domain name.

 * 'msg' is a pointer to the beginning of the message,

 * 'eomorig' points to the first location after the message,

 * 'exp_dn' is a pointer to a buffer of size 'length' for the result.

 * Return size of compressed name or -1 if there was an error.

 */

int

dn_expand(const u_char *msg, const u_char *eomorig, const u_char *comp_dn,

    char *exp_dn, int length)

{

	const u_char *cp;

	char *dn;

	int n, c;

	char *eom;

	int len = -1, checked = 0;

	dn = exp_dn;

	cp = comp_dn;

	/*

	 * fetch next label in domain name

	 */

		/*

		 * Check for indirection

		 */

		case 0:

			}

				}

			}

			break;

		case INDIR_MASK:

			/*

			 * Check for loops in the compressed name;

			 * if we've looked at the whole message,

			 * there must be a loop.

			 */

			break;

		default:

		}

	}

}

DEF_WEAK(dn_expand);

/*

 * Compress domain name 'exp_dn' into 'comp_dn'.

 * Return the size of the compressed name or -1.

 * 'length' is the size of the array pointed to by 'comp_dn'.

 * 'dnptrs' is a list of pointers to previous compressed names. dnptrs[0]

 * is a pointer to the beginning of the message. The list ends with NULL.

 * 'lastdnptr' is a pointer to the end of the arrary pointed to

 * by 'dnptrs'. Side effect is to update the list of pointers for

 * labels inserted into the message as we compress the name.

 * If 'dnptr' is NULL, we don't try to compress names. If 'lastdnptr'

 * is NULL, we don't update the list.

 */

int

dn_comp(const char *exp_dn, u_char *comp_dn, int length, u_char **dnptrs,

    u_char **lastdnptr)

{

	u_char *cp, *dn;

	int c, l;

	u_char **cpp, **lpp, *sp, *eob;

	u_char *msg;

	dn = (u_char *)exp_dn;

	cp = comp_dn;

	lpp = cpp = NULL;

				;

			lpp = cpp;	/* end of list to search */

		}

	} else

		msg = NULL;

		/* look to see if we can use pointers */

			}

			/* not found, save it */

			}

		}

			}

					break;

			}

			}

		/* catch trailing '.'s but not '..' */

		}

		}

	}

	}

}

/*

 * Skip over a compressed domain name. Return the size or -1.

 */

int

__dn_skipname(const u_char *comp_dn, const u_char *eom)

{

	const u_char *cp;

	int n;

	cp = comp_dn;

		/*

		 * check for indirection

		 */

		case 0:			/* normal case, n == len */

		case INDIR_MASK:	/* indirection */

			break;

		default:		/* illegal type */

		}

	}

}

static int

mklower(int ch)

{

}

/*

 * Search for expanded name from a list of previously compressed names.

 * Return the offset from msg if found or -1.

 * dnptrs is the pointer to the first name on the list,

 * not the pointer to the start of the message.

 */

static int

dn_find(u_char *exp_dn, u_char *msg, u_char **dnptrs, u_char **lastdnptr)

{

	u_char *dn, *cp, **cpp;

	int n;

	u_char *sp;

		dn = exp_dn;

			/*

			 * check for indirection

			 */

			case 0:		/* normal case, n == len */

						goto next;

						goto next;

				}

				goto next;

			case INDIR_MASK:	/* indirection */

				break;

			default:	/* illegal type */

			}

		}

	next:	;

	}

}

/*

 * Verify that a domain name uses an acceptable character set.

 */

/*

 * Note the conspicuous absence of ctype macros in these definitions.  On

 * non-ASCII hosts, we can't depend on string literals or ctype macros to

 * tell us anything about network-format data.  The rest of the BIND system

 * is not careful about this, but for some reason, we're doing it right here.

 */

#define PERIOD 0x2e

#define	hyphenchar(c) ((c) == 0x2d)

#define bslashchar(c) ((c) == 0x5c)

#define underscorechar(c) ((c) == 0x5f)

#define periodchar(c) ((c) == PERIOD)

#define asterchar(c) ((c) == 0x2a)

#define alphachar(c) (((c) >= 0x41 && (c) <= 0x5a) \

		   || ((c) >= 0x61 && (c) <= 0x7a))

#define digitchar(c) ((c) >= 0x30 && (c) <= 0x39)

#define borderchar(c) (alphachar(c) || digitchar(c))

#define middlechar(c) (borderchar(c) || hyphenchar(c) || underscorechar(c))

#define	domainchar(c) ((c) > 0x20 && (c) < 0x7f)

int

__res_hnok(const char *dn)

{

			;

		} else {

		}

		pch = ch, ch = nch;

	}

}

DEF_STRONG(__res_hnok);

/*

 * hostname-like (A, MX, WKS) owners can have "*" as their first label

 * but must otherwise be as a host name.

 */

int

res_ownok(const char *dn)

{

	}

}

/*

 * SOA RNAMEs and RP RNAMEs can have any printable character in their first

 * label, but the rest of the name has to look like a host name.

 */

int

res_mailok(const char *dn)

{

	int ch, escaped = 0;

	/* "." is a valid missing representation */

	/* otherwise <label>.<hostname> */

			break;

	}

}

/*

 * This function is quite liberal, since RFC 1034's character sets are only

 * recommendations.

 */

int

res_dnok(const char *dn)

{

	int ch;

}

/*

 * Routines to insert/extract short/long's.

 */

u_int16_t

_getshort(const u_char *msgp)

{

	u_int16_t u;

}

DEF_STRONG(_getshort);

u_int32_t

_getlong(const u_char *msgp)

{

	u_int32_t u;

}

DEF_STRONG(_getlong);

void

__putshort(u_int16_t s, u_char *msgp)

{

}

void

__putlong(u_int32_t l, u_char *msgp)

{

}