/* config.c - ldap backend configuration file routine */
/* $OpenLDAP$ */
/*
 * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
 */
/* This is an altered version */
/*
 * Copyright 1999, Howard Chu, All rights reserved. <hyc@highlandsun.com>
 * 
 * Permission is granted to anyone to use this software for any purpose
 * on any computer system, and to alter it and redistribute it, subject
 * to the following restrictions:
 * 
 * 1. The author is not responsible for the consequences of use of this
 *    software, no matter how awful, even if they arise from flaws in it.
 * 
 * 2. The origin of this software must not be misrepresented, either by
 *    explicit claim or by omission.  Since few users ever read sources,
 *    credits should appear in the documentation.
 * 
 * 3. Altered versions must be plainly marked as such, and must not be
 *    misrepresented as being the original software.  Since few users
 *    ever read sources, credits should appear in the documentation.
 * 
 * 4. This notice may not be removed or altered.
 *
 *
 *
 * Copyright 2000, Pierangelo Masarati, All rights reserved. <ando@sys-net.it>
 * 
 * This software is being modified by Pierangelo Masarati.
 * The previously reported conditions apply to the modified code as well.
 * Changes in the original code are highlighted where required.
 * Credits for the original code go to the author, Howard Chu.
 */

#include "portable.h"

#include <stdio.h>

#include <ac/string.h>
#include <ac/socket.h>

#include "slap.h"
#include "back-ldap.h"

int
ldap_back_db_config(
    BackendDB	*be,
    const char	*fname,
    int		lineno,
    int		argc,
    char	**argv
)
{
	struct ldapinfo	*li = (struct ldapinfo *) be->be_private;

	if ( li == NULL ) {
		fprintf( stderr, "%s: line %d: ldap backend info is null!\n",
		    fname, lineno );
		return( 1 );
	}

	/* server address to query (depricated, use "uri" directive) */
	if ( strcasecmp( argv[0], "server" ) == 0 ) {
		if (argc != 2) {
			fprintf( stderr,
	"%s: line %d: missing address in \"server <address>\" line\n",
			    fname, lineno );
			return( 1 );
		}
		if (li->url != NULL)
			ch_free(li->url);
		li->url = ch_calloc(strlen(argv[1]) + 9, sizeof(char));
		if (li->url != NULL) {
			strcpy(li->url, "ldap://");
			strcat(li->url, argv[1]);
			strcat(li->url, "/");
		}

	/* URI of server to query (preferred over "server" directive) */
	} else if ( strcasecmp( argv[0], "uri" ) == 0 ) {
		if (argc != 2) {
			fprintf( stderr,
	"%s: line %d: missing address in \"uri <address>\" line\n",
			    fname, lineno );
			return( 1 );
		}
		if (li->url != NULL)
			ch_free(li->url);
		li->url = ch_strdup(argv[1]);

	/* name to use for ldap_back_group */
	} else if ( strcasecmp( argv[0], "binddn" ) == 0 ) {
		if (argc != 2) {
			fprintf( stderr,
	"%s: line %d: missing name in \"binddn <name>\" line\n",
			    fname, lineno );
			return( 1 );
		}
		li->binddn = ch_strdup(argv[1]);

	/* password to use for ldap_back_group */
	} else if ( strcasecmp( argv[0], "bindpw" ) == 0 ) {
		if (argc != 2) {
			fprintf( stderr,
	"%s: line %d: missing password in \"bindpw <password>\" line\n",
			    fname, lineno );
			return( 1 );
		}
		li->bindpw = ch_strdup(argv[1]);
	
	/* dn massaging */
	} else if ( strcasecmp( argv[0], "suffixmassage" ) == 0 ) {
		char *dn, *massaged_dn;
		BackendDB *tmp_be;
		
		if ( argc != 3 ) {
			fprintf( stderr,
	"%s: line %d: syntax is \"suffixMassage <suffix> <massaged suffix>\"\n",
				fname, lineno );
			return( 1 );
		}
		
		tmp_be = select_backend( argv[1], 0 );
		if ( tmp_be != NULL && tmp_be != be ) {
			fprintf( stderr,
	"%s: line %d: suffix already in use by another backend in"
	" \"suffixMassage <suffix> <massaged suffix>\"\n",
				fname, lineno );
			return( 1 );						
		}

		tmp_be = select_backend( argv[2], 0 );
		if ( tmp_be != NULL ) {
			fprintf( stderr,
        "%s: line %d: massaged suffix already in use by another backend in" 
        " \"suffixMassage <suffix> <massaged suffix>\"\n",
                                fname, lineno );
                        return( 1 );
		}
		
		dn = ch_strdup( argv[1] );
		charray_add( &li->suffix_massage, dn );
		(void) dn_normalize( dn );
		charray_add( &li->suffix_massage, dn );
		
		massaged_dn = ch_strdup( argv[2] );
		charray_add( &li->suffix_massage, massaged_dn );
		(void) dn_normalize( massaged_dn );
		charray_add( &li->suffix_massage, massaged_dn );
		
		free( dn );
		free( massaged_dn );

	/* objectclass/attribute mapping */
	} else if ( strcasecmp( argv[0], "map" ) == 0 ) {
		struct ldapmap *map;
		struct ldapmapping *mapping;
		char *src, *dst;

		if ( argc < 3 || argc > 4 ) {
			fprintf( stderr,
	"%s: line %d: syntax is \"map {objectclass | attribute} {<source> | *} [<dest> | *]\"\n",
				fname, lineno );
			return( 1 );
		}

		if ( strcasecmp( argv[1], "objectclass" ) == 0 ) {
			map = &li->oc_map;
		} else if ( strcasecmp( argv[1], "attribute" ) == 0 ) {
			map = &li->at_map;
		} else {
			fprintf( stderr,
	"%s: line %d: syntax is \"map {objectclass | attribute} {<source> | *} [<dest> | *]\"\n",
				fname, lineno );
			return( 1 );
		}

		if ( strcasecmp( argv[2], "*" ) != 0 ) {
			src = argv[2];
			if ( argc < 4 )
				dst = "";
			else if ( strcasecmp( argv[3], "*" ) == 0 )
				dst = src;
			else
				dst = argv[3];
		} else {
			if ( argc < 4 ) {
				map->drop_missing = 1;
				return 0;
			}
			if ( strcasecmp( argv[3], "*" ) == 0 ) {
				map->drop_missing = 0;
				return 0;
			}

			src = argv[3];
			dst = src;
		}

		if ( ( map == &li->at_map )
			&& ( strcasecmp( src, "objectclass" ) == 0
				|| strcasecmp( dst, "objectclass" ) == 0 ) )
		{
			fprintf( stderr,
				"%s: line %d: objectclass attribute cannot be mapped\n",
				fname, lineno );
		}

		mapping = (struct ldapmapping *)ch_calloc( 2, sizeof(struct ldapmapping) );
		if ( mapping == NULL ) {
			fprintf( stderr,
				"%s: line %d: out of memory\n",
				fname, lineno );
			return( 1 );
		}
		mapping->src = ch_strdup(src);
		mapping->dst = ch_strdup(dst);
		if ( *dst != 0 ) {
			mapping[1].src = mapping->dst;
			mapping[1].dst = mapping->src;
		} else {
			mapping[1].src = mapping->src;
			mapping[1].dst = mapping->dst;
		}

		if ( avl_find( map->map, (caddr_t)mapping, mapping_cmp ) != NULL
			|| avl_find( map->remap, (caddr_t)&mapping[1], mapping_cmp ) != NULL)
		{
			fprintf( stderr,
				"%s: line %d: duplicate mapping found (ignored)\n",
				fname, lineno );
			return 0;
		}

		avl_insert( &map->map, (caddr_t)mapping,
					mapping_cmp, mapping_dup );
		avl_insert( &map->remap, (caddr_t)&mapping[1],
					mapping_cmp, mapping_dup );

	/* anything else */
	} else {
		fprintf( stderr,
"%s: line %d: unknown directive \"%s\" in ldap database definition (ignored)\n",
		    fname, lineno, argv[0] );
	}
	return 0;
}

int
mapping_cmp ( const void *c1, const void *c2 )
{
	struct ldapmapping *map1 = (struct ldapmapping *)c1;
	struct ldapmapping *map2 = (struct ldapmapping *)c2;

	return ( strcasecmp(map1->src, map2->src) );
}

int
mapping_dup ( void *c1, void *c2 )
{
	struct ldapmapping *map1 = (struct ldapmapping *)c1;
	struct ldapmapping *map2 = (struct ldapmapping *)c2;

	return( ( strcasecmp(map1->src, map2->src) == 0 ) ? -1 : 0 );
}

char *
ldap_back_map ( struct ldapmap *map, char *s, int remap )
{
	Avlnode *tree;
	struct ldapmapping *mapping, fmapping;

	if (remap)
		tree = map->remap;
	else
		tree = map->map;

	fmapping.src = s;
	mapping = (struct ldapmapping *)avl_find( tree, (caddr_t)&fmapping, mapping_cmp );
	if (mapping != NULL) {
		if ( *mapping->dst == 0 )
			return(NULL);
		return(mapping->dst);
	}

	if (map->drop_missing)
		return(NULL);

	return(s);
}

char *
ldap_back_map_filter ( struct ldapinfo *li, char *f, int remap )
{
	char *nf, *m, *p, *q, *s, c;
	int len, extra, plen, in_quote;

	if (f == NULL)
		return(NULL);

	len = strlen(f);
	extra = len;
	len *= 2;
	nf = ch_malloc( len + 1 );
	if (nf == NULL)
		return(NULL);

	/* this loop assumes the filter ends with one
	 * of the delimiter chars -- probably ')'.
	 */

	s = nf;
	q = NULL;
	in_quote = 0;
	for (p = f; c = *p; p++) {
		if (c == '"') {
			in_quote = !in_quote;
			if (q != NULL) {
				plen = p - q;
				memcpy(s, q, plen);
				s += plen;
				q = NULL;
			}
			*s++ = c;
		} else if (in_quote) {
			/* ignore everything in quotes --
			 * what about attrs in DNs?
			 */
			*s++ = c;
		} else if (c != '(' && c != ')'
			&& c != '=' && c != '>' && c != '<'
			&& c != '|' && c != '&')
		{
			if (q == NULL)
				q = p;
		} else {
			if (q != NULL) {
				*p = 0;
				m = ldap_back_map(&li->at_map, q, remap);
				if (m == NULL)
					m = ldap_back_map(&li->oc_map, q, remap);
				if (m == NULL) {
					m = q;
				}
				extra += p - q;
				plen = strlen(m);
				extra -= plen;
				if (extra < 0) {
					while (extra < 0) {
						extra += len;
						len *= 2;
					}
					s -= (long)nf;
					nf = ch_realloc(nf, len + 1);
					if (nf == NULL) {
						free(nf);
						return(NULL);
					}
					s += (long)nf;
				}
				memcpy(s, m, plen);
				s += plen;
				*p = c;
				q = NULL;
			}
			*s++ = c;
		}
	}
	*s = 0;
	return(nf);
}

char **
ldap_back_map_attrs ( struct ldapinfo *li, char **a, int remap )
{
	int i, j, count;
	char **na, *mapped;

	if (a == NULL)
		return(NULL);

	for (count = 0; a[count] != NULL; count++) {
		/*  */
	}

	na = (char **)ch_calloc( count + 1, sizeof(char *) );
	if (na == NULL)
		return(NULL);

	for (i = 0, j = 0; i < count; i++) {
		mapped = ldap_back_map(&li->at_map, a[i], remap);
		if (mapped != NULL) {
			mapped = ch_strdup(mapped);
			if (mapped == NULL) {
				charray_free(na);
				return(NULL);
			}
			na[j] = mapped;
			j++;
		}
	}
	return(na);
}