New file. Contains various things lifted from OpenLDAP for use on Windows

2005-11-25  Tor Lillqvist  <tml@novell.com>

	* gui/component/openldap-extract.h: New file. Contains various
	things lifted from OpenLDAP for use on Windows where we use
	Microsoft's LDAP implementation. The same file is also in
	e-d-s/backends/ldap.

	* gui/component/Makefile.am: Distribute openldap-extract.h.

svn path=/trunk/; revision=30674

1 files changed, 1427 insertions, 0 deletions

diff --git a/addressbook/gui/component/openldap-extract.h b/addressbook/gui/component/openldap-extract.h
new file mode 100644
index 0000000000..25c47df653
--- /dev/null
+++ b/addressbook/gui/component/openldap-extract.h
@@ -0,0 +1,1427 @@
+/* This is extracted from the OpenLDAP sources.
+ *
+ * Stuff that isn't used in e-book-backend-ldap.c was dropped, like
+ * the LDAPSchemaExtensionItem stuff.
+ *
+ * This file basically has three parts:
+ *
+ * - some general macros from OpenLDAP that work as such on all
+ *   implementations.
+ *
+ * - ldap_str2objectclass()
+ *
+ * - ldap_url_parse()
+ */
+
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2005 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#include <string.h>
+#include <assert.h>
+
+/* from various header files */
+
+#define LDAP_CONST const
+
+#define LDAP_PORT		389		/* ldap:///		default LDAP port */
+#define LDAPS_PORT		636		/* ldaps:///	default LDAP over TLS port */
+
+#define LDAP_ROOT_DSE				""
+
+#define LDAP_SPACE(c)		((c) == ' ' || (c) == '\t' || (c) == '\n')
+#define LDAP_DIGIT(c)		((c) >= '0' && (c) <= '9')
+
+#define LDAP_EXOP_START_TLS		"1.3.6.1.4.1.1466.20037"	/* RFC 2830 */
+
+#define LDAP_MALLOC(n) malloc((n))
+#define LDAP_CALLOC(n,s) calloc((n),(s))
+#define LDAP_REALLOC(p,s) realloc((p),(s))
+#define LDAP_FREE(p) free((p))
+#define LDAP_VFREE(p) vfree((void **)(p))
+#define LDAP_STRDUP(s) strdup((s))
+
+#define LDAP_RANGE(n,x,y)	(((x) <= (n)) && ((n) <= (y)))
+#define LDAP_NAME_ERROR(n)	LDAP_RANGE((n),0x20,0x24) /* 32-34,36 */
+
+#define ldap_msgtype(lm) (lm)->lm_msgtype
+#define ldap_msgid(lm) (lm)->lm_msgid
+
+#define LDAP_SCHERR_OUTOFMEM		1
+#define LDAP_SCHERR_UNEXPTOKEN		2
+#define LDAP_SCHERR_NOLEFTPAREN		3
+#define LDAP_SCHERR_NORIGHTPAREN	4
+#define LDAP_SCHERR_NODIGIT		5
+#define LDAP_SCHERR_BADNAME		6
+#define LDAP_SCHERR_BADDESC		7
+#define LDAP_SCHERR_BADSUP		8
+#define LDAP_SCHERR_DUPOPT		9
+#define LDAP_SCHERR_EMPTY		10
+#define LDAP_SCHERR_MISSING		11
+#define LDAP_SCHERR_OUT_OF_ORDER	12
+
+#define LDAP_SCHEMA_YES				1
+
+#define LDAP_SCHEMA_ABSTRACT			0
+#define LDAP_SCHEMA_STRUCTURAL			1
+#define LDAP_SCHEMA_AUXILIARY			2
+
+#define LDAP_SCHEMA_ALLOW_NONE		0x00U /* Strict parsing               */
+#define LDAP_SCHEMA_ALLOW_NO_OID	0x01U /* Allow missing oid            */
+#define LDAP_SCHEMA_ALLOW_QUOTED	0x02U /* Allow bogus extra quotes     */
+#define LDAP_SCHEMA_ALLOW_DESCR		0x04U /* Allow descr instead of OID   */
+#define LDAP_SCHEMA_ALLOW_DESCR_PREFIX	0x08U /* Allow descr as OID prefix    */
+#define LDAP_SCHEMA_ALLOW_OID_MACRO	0x10U /* Allow OID macros in slapd    */
+#define LDAP_SCHEMA_ALLOW_OUT_OF_ORDER_FIELDS 0x20U /* Allow fields in most any order */
+#define LDAP_SCHEMA_ALLOW_ALL		0x3fU /* Be very liberal in parsing   */
+#define	LDAP_SCHEMA_SKIP			0x80U /* Don't malloc any result      */
+
+typedef struct ldap_objectclass {
+	char *oc_oid;		/* REQUIRED */
+	char **oc_names;	/* OPTIONAL */
+	char *oc_desc;		/* OPTIONAL */
+	int  oc_obsolete;	/* 0=no, 1=yes */
+	char **oc_sup_oids;	/* OPTIONAL */
+	int  oc_kind;		/* 0=ABSTRACT, 1=STRUCTURAL, 2=AUXILIARY */
+	char **oc_at_oids_must;	/* OPTIONAL */
+	char **oc_at_oids_may;	/* OPTIONAL */
+} LDAPObjectClass;
+
+
+static void
+vfree(void **vec)
+{
+  int i;
+
+  for (i = 0; vec[i] != NULL; i++)
+    free(vec[i]);
+}
+
+/* from schema.c */
+
+/*
+ * Now come the parsers.  There is one parser for each entity type:
+ * objectclasses, attributetypes, etc.
+ *
+ * Each of them is written as a recursive-descent parser, except that
+ * none of them is really recursive.  But the idea is kept: there
+ * is one routine per non-terminal that eithers gobbles lexical tokens
+ * or calls lower-level routines, etc.
+ *
+ * The scanner is implemented in the routine get_token.  Actually,
+ * get_token is more than a scanner and will return tokens that are
+ * in fact non-terminals in the grammar.  So you can see the whole
+ * approach as the combination of a low-level bottom-up recognizer
+ * combined with a scanner and a number of top-down parsers.  Or just
+ * consider that the real grammars recognized by the parsers are not
+ * those of the standards.  As a matter of fact, our parsers are more
+ * liberal than the spec when there is no ambiguity.
+ *
+ * The difference is pretty academic (modulo bugs or incorrect
+ * interpretation of the specs).
+ */
+
+#define TK_NOENDQUOTE	-2
+#define TK_OUTOFMEM	-1
+#define TK_EOS		0
+#define TK_UNEXPCHAR	1
+#define TK_BAREWORD	2
+#define TK_QDSTRING	3
+#define TK_LEFTPAREN	4
+#define TK_RIGHTPAREN	5
+#define TK_DOLLAR	6
+#define TK_QDESCR	TK_QDSTRING
+
+struct token {
+	int type;
+	char *sval;
+};
+
+static int
+get_token( const char ** sp, char ** token_val )
+{
+	int kind;
+	const char * p;
+	const char * q;
+	char * res;
+
+	*token_val = NULL;
+	switch (**sp) {
+	case '\0':
+		kind = TK_EOS;
+		(*sp)++;
+		break;
+	case '(':
+		kind = TK_LEFTPAREN;
+		(*sp)++;
+		break;
+	case ')':
+		kind = TK_RIGHTPAREN;
+		(*sp)++;
+		break;
+	case '$':
+		kind = TK_DOLLAR;
+		(*sp)++;
+		break;
+	case '\'':
+		kind = TK_QDSTRING;
+		(*sp)++;
+		p = *sp;
+		while ( **sp != '\'' && **sp != '\0' )
+			(*sp)++;
+		if ( **sp == '\'' ) {
+			q = *sp;
+			res = LDAP_MALLOC(q-p+1);
+			if ( !res ) {
+				kind = TK_OUTOFMEM;
+			} else {
+				strncpy(res,p,q-p);
+				res[q-p] = '\0';
+				*token_val = res;
+			}
+			(*sp)++;
+		} else {
+			kind = TK_NOENDQUOTE;
+		}
+		break;
+	default:
+		kind = TK_BAREWORD;
+		p = *sp;
+		while ( !LDAP_SPACE(**sp) &&
+			**sp != '(' &&
+			**sp != ')' &&
+			**sp != '$' &&
+			**sp != '\'' &&
+			**sp != '\0' )
+			(*sp)++;
+		q = *sp;
+		res = LDAP_MALLOC(q-p+1);
+		if ( !res ) {
+			kind = TK_OUTOFMEM;
+		} else {
+			strncpy(res,p,q-p);
+			res[q-p] = '\0';
+			*token_val = res;
+		}
+		break;
+/*  		kind = TK_UNEXPCHAR; */
+/*  		break; */
+	}
+	
+	return kind;
+}
+
+/* Gobble optional whitespace */
+static void
+parse_whsp(const char **sp)
+{
+	while (LDAP_SPACE(**sp))
+		(*sp)++;
+}
+
+/* Parse a sequence of dot-separated decimal strings */
+static char *
+ldap_int_parse_numericoid(const char **sp, int *code, const int flags)
+{
+	char * res = NULL;
+	const char * start = *sp;
+	int len;
+	int quoted = 0;
+
+	/* Netscape puts the SYNTAX value in quotes (incorrectly) */
+	if ( flags & LDAP_SCHEMA_ALLOW_QUOTED && **sp == '\'' ) {
+		quoted = 1;
+		(*sp)++;
+		start++;
+	}
+	/* Each iteration of this loop gets one decimal string */
+	while (**sp) {
+		if ( !LDAP_DIGIT(**sp) ) {
+			/*
+			 * Initial char is not a digit or char after dot is
+			 * not a digit
+			 */
+			*code = LDAP_SCHERR_NODIGIT;
+			return NULL;
+		}
+		(*sp)++;
+		while ( LDAP_DIGIT(**sp) )
+			(*sp)++;
+		if ( **sp != '.' )
+			break;
+		/* Otherwise, gobble the dot and loop again */
+		(*sp)++;
+	}
+	/* Now *sp points at the char past the numericoid. Perfect. */
+	len = *sp - start;
+	if ( flags & LDAP_SCHEMA_ALLOW_QUOTED && quoted ) {
+		if ( **sp == '\'' ) {
+			(*sp)++;
+		} else {
+			*code = LDAP_SCHERR_UNEXPTOKEN;
+			return NULL;
+		}
+	}
+	if (flags & LDAP_SCHEMA_SKIP) {
+		res = (char *)start;
+	} else {
+		res = LDAP_MALLOC(len+1);
+		if (!res) {
+			*code = LDAP_SCHERR_OUTOFMEM;
+			return(NULL);
+		}
+		strncpy(res,start,len);
+		res[len] = '\0';
+	}
+	return(res);
+}
+
+/* Parse a qdescr or a list of them enclosed in () */
+static char **
+parse_qdescrs(const char **sp, int *code)
+{
+	char ** res;
+	char ** res1;
+	int kind;
+	char * sval;
+	int size;
+	int pos;
+
+	parse_whsp(sp);
+	kind = get_token(sp,&sval);
+	if ( kind == TK_LEFTPAREN ) {
+		/* Let's presume there will be at least 2 entries */
+		size = 3;
+		res = LDAP_CALLOC(3,sizeof(char *));
+		if ( !res ) {
+			*code = LDAP_SCHERR_OUTOFMEM;
+			return NULL;
+		}
+		pos = 0;
+		while (1) {
+			parse_whsp(sp);
+			kind = get_token(sp,&sval);
+			if ( kind == TK_RIGHTPAREN )
+				break;
+			if ( kind == TK_QDESCR ) {
+				if ( pos == size-2 ) {
+					size++;
+					res1 = LDAP_REALLOC(res,size*sizeof(char *));
+					if ( !res1 ) {
+						LDAP_VFREE(res);
+						LDAP_FREE(sval);
+						*code = LDAP_SCHERR_OUTOFMEM;
+						return(NULL);
+					}
+					res = res1;
+				}
+				res[pos++] = sval;
+				res[pos] = NULL;
+				parse_whsp(sp);
+			} else {
+				LDAP_VFREE(res);
+				LDAP_FREE(sval);
+				*code = LDAP_SCHERR_UNEXPTOKEN;
+				return(NULL);
+			}
+		}
+		parse_whsp(sp);
+		return(res);
+	} else if ( kind == TK_QDESCR ) {
+		res = LDAP_CALLOC(2,sizeof(char *));
+		if ( !res ) {
+			*code = LDAP_SCHERR_OUTOFMEM;
+			return NULL;
+		}
+		res[0] = sval;
+		res[1] = NULL;
+		parse_whsp(sp);
+		return res;
+	} else {
+		LDAP_FREE(sval);
+		*code = LDAP_SCHERR_BADNAME;
+		return NULL;
+	}
+}
+
+/* Parse a woid or a $-separated list of them enclosed in () */
+static char **
+parse_oids(const char **sp, int *code, const int allow_quoted)
+{
+	char ** res;
+	char ** res1;
+	int kind;
+	char * sval;
+	int size;
+	int pos;
+
+	/*
+	 * Strictly speaking, doing this here accepts whsp before the
+	 * ( at the begining of an oidlist, but this is harmless.  Also,
+	 * we are very liberal in what we accept as an OID.  Maybe
+	 * refine later.
+	 */
+	parse_whsp(sp);
+	kind = get_token(sp,&sval);
+	if ( kind == TK_LEFTPAREN ) {
+		/* Let's presume there will be at least 2 entries */
+		size = 3;
+		res = LDAP_CALLOC(3,sizeof(char *));
+		if ( !res ) {
+			*code = LDAP_SCHERR_OUTOFMEM;
+			return NULL;
+		}
+		pos = 0;
+		parse_whsp(sp);
+		kind = get_token(sp,&sval);
+		if ( kind == TK_BAREWORD ||
+		     ( allow_quoted && kind == TK_QDSTRING ) ) {
+			res[pos++] = sval;
+			res[pos] = NULL;
+		} else {
+			*code = LDAP_SCHERR_UNEXPTOKEN;
+			LDAP_FREE(sval);
+			LDAP_VFREE(res);
+			return NULL;
+		}
+		parse_whsp(sp);
+		while (1) {
+			kind = get_token(sp,&sval);
+			if ( kind == TK_RIGHTPAREN )
+				break;
+			if ( kind == TK_DOLLAR ) {
+				parse_whsp(sp);
+				kind = get_token(sp,&sval);
+				if ( kind == TK_BAREWORD ||
+				     ( allow_quoted &&
+				       kind == TK_QDSTRING ) ) {
+					if ( pos == size-2 ) {
+						size++;
+						res1 = LDAP_REALLOC(res,size*sizeof(char *));
+						if ( !res1 ) {
+							LDAP_FREE(sval);
+							LDAP_VFREE(res);
+							*code = LDAP_SCHERR_OUTOFMEM;
+							return(NULL);
+						}
+						res = res1;
+					}
+					res[pos++] = sval;
+					res[pos] = NULL;
+				} else {
+					*code = LDAP_SCHERR_UNEXPTOKEN;
+					LDAP_FREE(sval);
+					LDAP_VFREE(res);
+					return NULL;
+				}
+				parse_whsp(sp);
+			} else {
+				*code = LDAP_SCHERR_UNEXPTOKEN;
+				LDAP_FREE(sval);
+				LDAP_VFREE(res);
+				return NULL;
+			}
+		}
+		parse_whsp(sp);
+		return(res);
+	} else if ( kind == TK_BAREWORD ||
+		    ( allow_quoted && kind == TK_QDSTRING ) ) {
+		res = LDAP_CALLOC(2,sizeof(char *));
+		if ( !res ) {
+			LDAP_FREE(sval);
+			*code = LDAP_SCHERR_OUTOFMEM;
+			return NULL;
+		}
+		res[0] = sval;
+		res[1] = NULL;
+		parse_whsp(sp);
+		return res;
+	} else {
+		LDAP_FREE(sval);
+		*code = LDAP_SCHERR_BADNAME;
+		return NULL;
+	}
+}
+
+static void
+ldap_objectclass_free(LDAPObjectClass * oc)
+{
+	LDAP_FREE(oc->oc_oid);
+	if (oc->oc_names) LDAP_VFREE(oc->oc_names);
+	if (oc->oc_desc) LDAP_FREE(oc->oc_desc);
+	if (oc->oc_sup_oids) LDAP_VFREE(oc->oc_sup_oids);
+	if (oc->oc_at_oids_must) LDAP_VFREE(oc->oc_at_oids_must);
+	if (oc->oc_at_oids_may) LDAP_VFREE(oc->oc_at_oids_may);
+	LDAP_FREE(oc);
+}
+
+static LDAPObjectClass *
+ldap_str2objectclass( LDAP_CONST char * s,
+	int * code,
+	LDAP_CONST char ** errp,
+	LDAP_CONST unsigned flags )
+{
+	int kind;
+	const char * ss = s;
+	char * sval;
+	int seen_name = 0;
+	int seen_desc = 0;
+	int seen_obsolete = 0;
+	int seen_sup = 0;
+	int seen_kind = 0;
+	int seen_must = 0;
+	int seen_may = 0;
+	LDAPObjectClass * oc;
+	char ** ext_vals;
+	const char * savepos;
+
+	if ( !s ) {
+		*code = LDAP_SCHERR_EMPTY;
+		*errp = "";
+		return NULL;
+	}
+
+	*errp = s;
+	oc = LDAP_CALLOC(1,sizeof(LDAPObjectClass));
+
+	if ( !oc ) {
+		*code = LDAP_SCHERR_OUTOFMEM;
+		return NULL;
+	}
+	oc->oc_kind = LDAP_SCHEMA_STRUCTURAL;
+
+	kind = get_token(&ss,&sval);
+	if ( kind != TK_LEFTPAREN ) {
+		*code = LDAP_SCHERR_NOLEFTPAREN;
+		LDAP_FREE(sval);
+		ldap_objectclass_free(oc);
+		return NULL;
+	}
+
+	/*
+	 * Definitions MUST begin with an OID in the numericoid format.
+	 * However, this routine is used by clients to parse the response
+	 * from servers and very well known servers will provide an OID
+	 * in the wrong format or even no OID at all.  We do our best to
+	 * extract info from those servers.
+	 */
+	parse_whsp(&ss);
+	savepos = ss;
+	oc->oc_oid = ldap_int_parse_numericoid(&ss,code,0);
+	if ( !oc->oc_oid ) {
+		if ( (flags & LDAP_SCHEMA_ALLOW_ALL) && (ss == savepos) ) {
+			/* Backtracking */
+			ss = savepos;
+			kind = get_token(&ss,&sval);
+			if ( kind == TK_BAREWORD ) {
+				if ( !strcasecmp(sval, "NAME") ||
+				     !strcasecmp(sval, "DESC") ||
+				     !strcasecmp(sval, "OBSOLETE") ||
+				     !strcasecmp(sval, "SUP") ||
+				     !strcasecmp(sval, "ABSTRACT") ||
+				     !strcasecmp(sval, "STRUCTURAL") ||
+				     !strcasecmp(sval, "AUXILIARY") ||
+				     !strcasecmp(sval, "MUST") ||
+				     !strcasecmp(sval, "MAY") ||
+				     !strncasecmp(sval, "X-", 2) ) {
+					/* Missing OID, backtrack */
+					ss = savepos;
+				} else if ( flags &
+					LDAP_SCHEMA_ALLOW_OID_MACRO ) {
+					/* Non-numerical OID, ignore */
+					int len = ss-savepos;
+					oc->oc_oid = LDAP_MALLOC(len+1);
+					strncpy(oc->oc_oid, savepos, len);
+					oc->oc_oid[len] = 0;
+				}
+			}
+			LDAP_FREE(sval);
+		} else {
+			*errp = ss;
+			ldap_objectclass_free(oc);
+			return NULL;
+		}
+	}
+	parse_whsp(&ss);
+
+	/*
+	 * Beyond this point we will be liberal an accept the items
+	 * in any order.
+	 */
+	while (1) {
+		kind = get_token(&ss,&sval);
+		switch (kind) {
+		case TK_EOS:
+			*code = LDAP_SCHERR_NORIGHTPAREN;
+			*errp = ss;
+			ldap_objectclass_free(oc);
+			return NULL;
+		case TK_RIGHTPAREN:
+			return oc;
+		case TK_BAREWORD:
+			if ( !strcasecmp(sval,"NAME") ) {
+				LDAP_FREE(sval);
+				if ( seen_name ) {
+					*code = LDAP_SCHERR_DUPOPT;
+					*errp = ss;
+					ldap_objectclass_free(oc);
+					return(NULL);
+				}
+				seen_name = 1;
+				oc->oc_names = parse_qdescrs(&ss,code);
+				if ( !oc->oc_names ) {
+					if ( *code != LDAP_SCHERR_OUTOFMEM )
+						*code = LDAP_SCHERR_BADNAME;
+					*errp = ss;
+					ldap_objectclass_free(oc);
+					return NULL;
+				}
+			} else if ( !strcasecmp(sval,"DESC") ) {
+				LDAP_FREE(sval);
+				if ( seen_desc ) {
+					*code = LDAP_SCHERR_DUPOPT;
+					*errp = ss;
+					ldap_objectclass_free(oc);
+					return(NULL);
+				}
+				seen_desc = 1;
+				parse_whsp(&ss);
+				kind = get_token(&ss,&sval);
+				if ( kind != TK_QDSTRING ) {
+					*code = LDAP_SCHERR_UNEXPTOKEN;
+					*errp = ss;
+					LDAP_FREE(sval);
+					ldap_objectclass_free(oc);
+					return NULL;
+				}
+				oc->oc_desc = sval;
+				parse_whsp(&ss);
+			} else if ( !strcasecmp(sval,"OBSOLETE") ) {
+				LDAP_FREE(sval);
+				if ( seen_obsolete ) {
+					*code = LDAP_SCHERR_DUPOPT;
+					*errp = ss;
+					ldap_objectclass_free(oc);
+					return(NULL);
+				}
+				seen_obsolete = 1;
+				oc->oc_obsolete = LDAP_SCHEMA_YES;
+				parse_whsp(&ss);
+			} else if ( !strcasecmp(sval,"SUP") ) {
+				LDAP_FREE(sval);
+				if ( seen_sup ) {
+					*code = LDAP_SCHERR_DUPOPT;
+					*errp = ss;
+					ldap_objectclass_free(oc);
+					return(NULL);
+				}
+				seen_sup = 1;
+				oc->oc_sup_oids = parse_oids(&ss,
+							     code,
+							     flags);
+				if ( !oc->oc_sup_oids ) {
+					*errp = ss;
+					ldap_objectclass_free(oc);
+					return NULL;
+				}
+			} else if ( !strcasecmp(sval,"ABSTRACT") ) {
+				LDAP_FREE(sval);
+				if ( seen_kind ) {
+					*code = LDAP_SCHERR_DUPOPT;
+					*errp = ss;
+					ldap_objectclass_free(oc);
+					return(NULL);
+				}
+				seen_kind = 1;
+				oc->oc_kind = LDAP_SCHEMA_ABSTRACT;
+				parse_whsp(&ss);
+			} else if ( !strcasecmp(sval,"STRUCTURAL") ) {
+				LDAP_FREE(sval);
+				if ( seen_kind ) {
+					*code = LDAP_SCHERR_DUPOPT;
+					*errp = ss;
+					ldap_objectclass_free(oc);
+					return(NULL);
+				}
+				seen_kind = 1;
+				oc->oc_kind = LDAP_SCHEMA_STRUCTURAL;
+				parse_whsp(&ss);
+			} else if ( !strcasecmp(sval,"AUXILIARY") ) {
+				LDAP_FREE(sval);
+				if ( seen_kind ) {
+					*code = LDAP_SCHERR_DUPOPT;
+					*errp = ss;
+					ldap_objectclass_free(oc);
+					return(NULL);
+				}
+				seen_kind = 1;
+				oc->oc_kind = LDAP_SCHEMA_AUXILIARY;
+				parse_whsp(&ss);
+			} else if ( !strcasecmp(sval,"MUST") ) {
+				LDAP_FREE(sval);
+				if ( seen_must ) {
+					*code = LDAP_SCHERR_DUPOPT;
+					*errp = ss;
+					ldap_objectclass_free(oc);
+					return(NULL);
+				}
+				seen_must = 1;
+				oc->oc_at_oids_must = parse_oids(&ss,code,0);
+				if ( !oc->oc_at_oids_must ) {
+					*errp = ss;
+					ldap_objectclass_free(oc);
+					return NULL;
+				}
+				parse_whsp(&ss);
+			} else if ( !strcasecmp(sval,"MAY") ) {
+				LDAP_FREE(sval);
+				if ( seen_may ) {
+					*code = LDAP_SCHERR_DUPOPT;
+					*errp = ss;
+					ldap_objectclass_free(oc);
+					return(NULL);
+				}
+				seen_may = 1;
+				oc->oc_at_oids_may = parse_oids(&ss,code,0);
+				if ( !oc->oc_at_oids_may ) {
+					*errp = ss;
+					ldap_objectclass_free(oc);
+					return NULL;
+				}
+				parse_whsp(&ss);
+			} else if ( sval[0] == 'X' && sval[1] == '-' ) {
+				/* Should be parse_qdstrings */
+				ext_vals = parse_qdescrs(&ss, code);
+				if ( !ext_vals ) {
+					*errp = ss;
+					ldap_objectclass_free(oc);
+					return NULL;
+				}
+#if 0
+				if ( add_extension(&oc->oc_extensions,
+						    sval, ext_vals) ) {
+					*code = LDAP_SCHERR_OUTOFMEM;
+					*errp = ss;
+					LDAP_FREE(sval);
+					ldap_objectclass_free(oc);
+					return NULL;
+				}
+#endif
+			} else {
+				*code = LDAP_SCHERR_UNEXPTOKEN;
+				*errp = ss;
+				LDAP_FREE(sval);
+				ldap_objectclass_free(oc);
+				return NULL;
+			}
+			break;
+		default:
+			*code = LDAP_SCHERR_UNEXPTOKEN;
+			*errp = ss;
+			LDAP_FREE(sval);
+			ldap_objectclass_free(oc);
+			return NULL;
+		}
+	}
+}
+
+/* from utf-8.c */
+
+#define LDAP_UTF8_NEXT(p) g_utf8_next_char((p))
+#define LDAP_UTF8_INCR(p) ((p)=LDAP_UTF8_NEXT((p)))
+#define ldap_x_utf8_to_ucs4(str) g_utf8_get_char(str)
+
+static char *ldap_utf8_strchr( const char *str, const char *chr )
+{
+	for( ; *str != '\0'; LDAP_UTF8_INCR(str) ) {
+		if( ldap_x_utf8_to_ucs4( str ) == ldap_x_utf8_to_ucs4( chr ) ) {
+			return (char *) str;
+		} 
+	}
+
+	return NULL;
+}
+
+static size_t ldap_utf8_strcspn( const char *str, const char *set )
+{
+	const char *cstr;
+	const char *cset;
+
+	for( cstr = str; *cstr != '\0'; LDAP_UTF8_INCR(cstr) ) {
+		for( cset = set; *cset != '\0'; LDAP_UTF8_INCR(cset) ) {
+			if( ldap_x_utf8_to_ucs4( cstr ) == ldap_x_utf8_to_ucs4( cset ) ) {
+				return cstr - str;
+			} 
+		}
+	}
+
+	return cstr - str;
+}
+
+static size_t ldap_utf8_strspn( const char *str, const char *set )
+{
+	const char *cstr;
+	const char *cset;
+
+	for( cstr = str; *cstr != '\0'; LDAP_UTF8_INCR(cstr) ) {
+		for( cset = set; ; LDAP_UTF8_INCR(cset) ) {
+			if( *cset == '\0' ) {
+				return cstr - str;
+			}
+
+			if( ldap_x_utf8_to_ucs4( cstr ) == ldap_x_utf8_to_ucs4( cset ) ) {
+				break;
+			} 
+		}
+	}
+
+	return cstr - str;
+}
+
+static char *ldap_utf8_strtok(char *str, const char *sep, char **last)
+{
+	char *begin;
+	char *end;
+
+	if( last == NULL ) return NULL;
+
+	begin = str ? str : *last;
+
+	begin += ldap_utf8_strspn( begin, sep );
+
+	if( *begin == '\0' ) {
+		*last = NULL;
+		return NULL;
+	}
+
+	end = &begin[ ldap_utf8_strcspn( begin, sep ) ];
+
+	if( *end != '\0' ) {
+		char *next = LDAP_UTF8_NEXT( end );
+		*end = '\0';
+		end = next;
+	}
+
+	*last = end;
+	return begin;
+}
+
+/* from ldap.h */
+
+#define LDAP_URL_SUCCESS		0x00	/* Success */
+#define LDAP_URL_ERR_MEM		0x01	/* can't allocate memory space */
+#define LDAP_URL_ERR_PARAM		0x02	/* parameter is bad */
+
+#define LDAP_URL_ERR_BADSCHEME	0x03	/* URL doesn't begin with "ldap[si]://" */
+#define LDAP_URL_ERR_BADENCLOSURE 0x04	/* URL is missing trailing ">" */
+#define LDAP_URL_ERR_BADURL		0x05	/* URL is bad */
+#define LDAP_URL_ERR_BADHOST	0x06	/* host port is bad */
+#define LDAP_URL_ERR_BADATTRS	0x07	/* bad (or missing) attributes */
+#define LDAP_URL_ERR_BADSCOPE	0x08	/* scope string is invalid (or missing) */
+#define LDAP_URL_ERR_BADFILTER	0x09	/* bad or missing filter */
+#define LDAP_URL_ERR_BADEXTS	0x0a	/* bad or missing extensions */
+
+#define LDAP_URL_PREFIX         "ldap://"
+#define LDAP_URL_PREFIX_LEN     (sizeof(LDAP_URL_PREFIX)-1)
+#define LDAPS_URL_PREFIX		"ldaps://"
+#define LDAPS_URL_PREFIX_LEN	(sizeof(LDAPS_URL_PREFIX)-1)
+#define LDAPI_URL_PREFIX	"ldapi://"
+#define LDAPI_URL_PREFIX_LEN	(sizeof(LDAPI_URL_PREFIX)-1)
+
+#define LDAP_URL_URLCOLON		"URL:"
+#define LDAP_URL_URLCOLON_LEN	(sizeof(LDAP_URL_URLCOLON)-1)
+
+typedef struct ldap_url_desc {
+	struct ldap_url_desc *lud_next;
+	char	*lud_scheme;
+	char	*lud_host;
+	int		lud_port;
+	char	*lud_dn;
+	char	**lud_attrs;
+	int		lud_scope;
+	char	*lud_filter;
+	char	**lud_exts;
+	int		lud_crit_exts;
+} LDAPURLDesc;
+
+/* from url.c */
+
+static const char*
+skip_url_prefix(
+	const char *url,
+	int *enclosedp,
+	const char **scheme )
+{
+	/*
+ 	 * return non-zero if this looks like a LDAP URL; zero if not
+ 	 * if non-zero returned, *urlp will be moved past "ldap://" part of URL
+ 	 */
+	const char *p;
+
+	if ( url == NULL ) {
+		return( NULL );
+	}
+
+	p = url;
+
+	/* skip leading '<' (if any) */
+	if ( *p == '<' ) {
+		*enclosedp = 1;
+		++p;
+	} else {
+		*enclosedp = 0;
+	}
+
+	/* skip leading "URL:" (if any) */
+	if ( strncasecmp( p, LDAP_URL_URLCOLON, LDAP_URL_URLCOLON_LEN ) == 0 ) {
+		p += LDAP_URL_URLCOLON_LEN;
+	}
+
+	/* check for "ldap://" prefix */
+	if ( strncasecmp( p, LDAP_URL_PREFIX, LDAP_URL_PREFIX_LEN ) == 0 ) {
+		/* skip over "ldap://" prefix and return success */
+		p += LDAP_URL_PREFIX_LEN;
+		*scheme = "ldap";
+		return( p );
+	}
+
+	/* check for "ldaps://" prefix */
+	if ( strncasecmp( p, LDAPS_URL_PREFIX, LDAPS_URL_PREFIX_LEN ) == 0 ) {
+		/* skip over "ldaps://" prefix and return success */
+		p += LDAPS_URL_PREFIX_LEN;
+		*scheme = "ldaps";
+		return( p );
+	}
+
+	/* check for "ldapi://" prefix */
+	if ( strncasecmp( p, LDAPI_URL_PREFIX, LDAPI_URL_PREFIX_LEN ) == 0 ) {
+		/* skip over "ldapi://" prefix and return success */
+		p += LDAPI_URL_PREFIX_LEN;
+		*scheme = "ldapi";
+		return( p );
+	}
+
+#ifdef LDAP_CONNECTIONLESS
+	/* check for "cldap://" prefix */
+	if ( strncasecmp( p, LDAPC_URL_PREFIX, LDAPC_URL_PREFIX_LEN ) == 0 ) {
+		/* skip over "cldap://" prefix and return success */
+		p += LDAPC_URL_PREFIX_LEN;
+		*scheme = "cldap";
+		return( p );
+	}
+#endif
+
+	return( NULL );
+}
+
+static int str2scope( const char *p )
+{
+	if ( strcasecmp( p, "one" ) == 0 ) {
+		return LDAP_SCOPE_ONELEVEL;
+
+	} else if ( strcasecmp( p, "onelevel" ) == 0 ) {
+		return LDAP_SCOPE_ONELEVEL;
+
+	} else if ( strcasecmp( p, "base" ) == 0 ) {
+		return LDAP_SCOPE_BASE;
+
+	} else if ( strcasecmp( p, "sub" ) == 0 ) {
+		return LDAP_SCOPE_SUBTREE;
+
+	} else if ( strcasecmp( p, "subtree" ) == 0 ) {
+		return LDAP_SCOPE_SUBTREE;
+	}
+
+	return( -1 );
+}
+
+static void
+ldap_free_urldesc( LDAPURLDesc *ludp )
+{
+	if ( ludp == NULL ) {
+		return;
+	}
+	
+	if ( ludp->lud_scheme != NULL ) {
+		LDAP_FREE( ludp->lud_scheme );
+	}
+
+	if ( ludp->lud_host != NULL ) {
+		LDAP_FREE( ludp->lud_host );
+	}
+
+	if ( ludp->lud_dn != NULL ) {
+		LDAP_FREE( ludp->lud_dn );
+	}
+
+	if ( ludp->lud_filter != NULL ) {
+		LDAP_FREE( ludp->lud_filter);
+	}
+
+	if ( ludp->lud_attrs != NULL ) {
+		LDAP_VFREE( ludp->lud_attrs );
+	}
+
+	if ( ludp->lud_exts != NULL ) {
+		LDAP_VFREE( ludp->lud_exts );
+	}
+
+	LDAP_FREE( ludp );
+}
+
+static int
+ldap_int_unhex( int c )
+{
+	return( c >= '0' && c <= '9' ? c - '0'
+	    : c >= 'A' && c <= 'F' ? c - 'A' + 10
+	    : c - 'a' + 10 );
+}
+
+static void
+ldap_pvt_hex_unescape( char *s )
+{
+	/*
+	 * Remove URL hex escapes from s... done in place.  The basic concept for
+	 * this routine is borrowed from the WWW library HTUnEscape() routine.
+	 */
+	char	*p;
+
+	for ( p = s; *s != '\0'; ++s ) {
+		if ( *s == '%' ) {
+			if ( *++s == '\0' ) {
+				break;
+			}
+			*p = ldap_int_unhex( *s ) << 4;
+			if ( *++s == '\0' ) {
+				break;
+			}
+			*p++ += ldap_int_unhex( *s );
+		} else {
+			*p++ = *s;
+		}
+	}
+
+	*p = '\0';
+}
+
+static char **
+ldap_str2charray( const char *str_in, const char *brkstr )
+{
+	char	**res;
+	char	*str, *s;
+	char	*lasts;
+	int	i;
+
+	/* protect the input string from strtok */
+	str = LDAP_STRDUP( str_in );
+	if( str == NULL ) {
+		return NULL;
+	}
+
+	i = 1;
+	for ( s = str; *s; s++ ) {
+		if ( ldap_utf8_strchr( brkstr, s ) != NULL ) {
+			i++;
+		}
+	}
+
+	res = (char **) LDAP_MALLOC( (i + 1) * sizeof(char *) );
+
+	if( res == NULL ) {
+		LDAP_FREE( str );
+		return NULL;
+	}
+
+	i = 0;
+
+	for ( s = ldap_utf8_strtok( str, brkstr, &lasts );
+		s != NULL;
+		s = ldap_utf8_strtok( NULL, brkstr, &lasts ) )
+	{
+		res[i] = LDAP_STRDUP( s );
+
+		if(res[i] == NULL) {
+			for( --i ; i >= 0 ; i-- ) {
+				LDAP_FREE( res[i] );
+			}
+			LDAP_FREE( res );
+			LDAP_FREE( str );
+			return NULL;
+		}
+
+		i++;
+	}
+
+	res[i] = NULL;
+
+	LDAP_FREE( str );
+	return( res );
+}
+
+static int
+ldap_url_parse_ext( LDAP_CONST char *url_in, LDAPURLDesc **ludpp )
+{
+/*
+ *  Pick apart the pieces of an LDAP URL.
+ */
+
+	LDAPURLDesc	*ludp;
+	char	*p, *q, *r;
+	int		i, enclosed;
+	const char *scheme = NULL;
+	const char *url_tmp;
+	char *url;
+
+	if( url_in == NULL || ludpp == NULL ) {
+		return LDAP_URL_ERR_PARAM;
+	}
+
+	*ludpp = NULL;	/* pessimistic */
+
+	url_tmp = skip_url_prefix( url_in, &enclosed, &scheme );
+
+	if ( url_tmp == NULL ) {
+		return LDAP_URL_ERR_BADSCHEME;
+	}
+
+	assert( scheme );
+
+	/* make working copy of the remainder of the URL */
+	url = LDAP_STRDUP( url_tmp );
+	if ( url == NULL ) {
+		return LDAP_URL_ERR_MEM;
+	}
+
+	if ( enclosed ) {
+		p = &url[strlen(url)-1];
+
+		if( *p != '>' ) {
+			LDAP_FREE( url );
+			return LDAP_URL_ERR_BADENCLOSURE;
+		}
+
+		*p = '\0';
+	}
+
+	/* allocate return struct */
+	ludp = (LDAPURLDesc *)LDAP_CALLOC( 1, sizeof( LDAPURLDesc ));
+
+	if ( ludp == NULL ) {
+		LDAP_FREE( url );
+		return LDAP_URL_ERR_MEM;
+	}
+
+	ludp->lud_next = NULL;
+	ludp->lud_host = NULL;
+	ludp->lud_port = 0;
+	ludp->lud_dn = NULL;
+	ludp->lud_attrs = NULL;
+	ludp->lud_filter = NULL;
+	ludp->lud_scope = LDAP_SCOPE_DEFAULT;
+	ludp->lud_filter = NULL;
+	ludp->lud_exts = NULL;
+
+	ludp->lud_scheme = LDAP_STRDUP( scheme );
+
+	if ( ludp->lud_scheme == NULL ) {
+		LDAP_FREE( url );
+		ldap_free_urldesc( ludp );
+		return LDAP_URL_ERR_MEM;
+	}
+
+	/* scan forward for '/' that marks end of hostport and begin. of dn */
+	p = strchr( url, '/' );
+
+	if( p != NULL ) {
+		/* terminate hostport; point to start of dn */
+		*p++ = '\0';
+	}
+
+	/* IPv6 syntax with [ip address]:port */
+	if ( *url == '[' ) {
+		r = strchr( url, ']' );
+		if ( r == NULL ) {
+			LDAP_FREE( url );
+			ldap_free_urldesc( ludp );
+			return LDAP_URL_ERR_BADURL;
+		}
+		*r++ = '\0';
+		q = strchr( r, ':' );
+	} else {
+		q = strchr( url, ':' );
+	}
+
+	if ( q != NULL ) {
+		char	*next;
+
+		*q++ = '\0';
+		ldap_pvt_hex_unescape( q );
+
+		if( *q == '\0' ) {
+			LDAP_FREE( url );
+			ldap_free_urldesc( ludp );
+			return LDAP_URL_ERR_BADURL;
+		}
+
+		ludp->lud_port = strtol( q, &next, 10 );
+		if ( next == NULL || next[0] != '\0' ) {
+			LDAP_FREE( url );
+			ldap_free_urldesc( ludp );
+			return LDAP_URL_ERR_BADURL;
+		}
+	}
+
+	ldap_pvt_hex_unescape( url );
+
+	/* If [ip address]:port syntax, url is [ip and we skip the [ */
+	ludp->lud_host = LDAP_STRDUP( url + ( *url == '[' ) );
+
+	if( ludp->lud_host == NULL ) {
+		LDAP_FREE( url );
+		ldap_free_urldesc( ludp );
+		return LDAP_URL_ERR_MEM;
+	}
+
+	/*
+	 * Kludge.  ldap://111.222.333.444:389??cn=abc,o=company
+	 *
+	 * On early Novell releases, search references/referrals were returned
+	 * in this format, i.e., the dn was kind of in the scope position,
+	 * but the required slash is missing. The whole thing is illegal syntax,
+	 * but we need to account for it. Fortunately it can't be confused with
+	 * anything real.
+	 */
+	if( (p == NULL) && (q != NULL) && ((q = strchr( q, '?')) != NULL)) {
+		q++;		
+		/* ? immediately followed by question */
+		if( *q == '?') {
+			q++;
+			if( *q != '\0' ) {
+				/* parse dn part */
+				ldap_pvt_hex_unescape( q );
+				ludp->lud_dn = LDAP_STRDUP( q );
+			} else {
+				ludp->lud_dn = LDAP_STRDUP( "" );
+			}
+
+			if( ludp->lud_dn == NULL ) {
+				LDAP_FREE( url );
+				ldap_free_urldesc( ludp );
+				return LDAP_URL_ERR_MEM;
+			}
+		}
+	}
+
+	if( p == NULL ) {
+		LDAP_FREE( url );
+		*ludpp = ludp;
+		return LDAP_URL_SUCCESS;
+	}
+
+	/* scan forward for '?' that may marks end of dn */
+	q = strchr( p, '?' );
+
+	if( q != NULL ) {
+		/* terminate dn part */
+		*q++ = '\0';
+	}
+
+	if( *p != '\0' ) {
+		/* parse dn part */
+		ldap_pvt_hex_unescape( p );
+		ludp->lud_dn = LDAP_STRDUP( p );
+	} else {
+		ludp->lud_dn = LDAP_STRDUP( "" );
+	}
+
+	if( ludp->lud_dn == NULL ) {
+		LDAP_FREE( url );
+		ldap_free_urldesc( ludp );
+		return LDAP_URL_ERR_MEM;
+	}
+
+	if( q == NULL ) {
+		/* no more */
+		LDAP_FREE( url );
+		*ludpp = ludp;
+		return LDAP_URL_SUCCESS;
+	}
+
+	/* scan forward for '?' that may marks end of attributes */
+	p = q;
+	q = strchr( p, '?' );
+
+	if( q != NULL ) {
+		/* terminate attributes part */
+		*q++ = '\0';
+	}
+
+	if( *p != '\0' ) {
+		/* parse attributes */
+		ldap_pvt_hex_unescape( p );
+		ludp->lud_attrs = ldap_str2charray( p, "," );
+
+		if( ludp->lud_attrs == NULL ) {
+			LDAP_FREE( url );
+			ldap_free_urldesc( ludp );
+			return LDAP_URL_ERR_BADATTRS;
+		}
+	}
+
+	if ( q == NULL ) {
+		/* no more */
+		LDAP_FREE( url );
+		*ludpp = ludp;
+		return LDAP_URL_SUCCESS;
+	}
+
+	/* scan forward for '?' that may marks end of scope */
+	p = q;
+	q = strchr( p, '?' );
+
+	if( q != NULL ) {
+		/* terminate the scope part */
+		*q++ = '\0';
+	}
+
+	if( *p != '\0' ) {
+		/* parse the scope */
+		ldap_pvt_hex_unescape( p );
+		ludp->lud_scope = str2scope( p );
+
+		if( ludp->lud_scope == -1 ) {
+			LDAP_FREE( url );
+			ldap_free_urldesc( ludp );
+			return LDAP_URL_ERR_BADSCOPE;
+		}
+	}
+
+	if ( q == NULL ) {
+		/* no more */
+		LDAP_FREE( url );
+		*ludpp = ludp;
+		return LDAP_URL_SUCCESS;
+	}
+
+	/* scan forward for '?' that may marks end of filter */
+	p = q;
+	q = strchr( p, '?' );
+
+	if( q != NULL ) {
+		/* terminate the filter part */
+		*q++ = '\0';
+	}
+
+	if( *p != '\0' ) {
+		/* parse the filter */
+		ldap_pvt_hex_unescape( p );
+
+		if( ! *p ) {
+			/* missing filter */
+			LDAP_FREE( url );
+			ldap_free_urldesc( ludp );
+			return LDAP_URL_ERR_BADFILTER;
+		}
+
+		LDAP_FREE( ludp->lud_filter );
+		ludp->lud_filter = LDAP_STRDUP( p );
+
+		if( ludp->lud_filter == NULL ) {
+			LDAP_FREE( url );
+			ldap_free_urldesc( ludp );
+			return LDAP_URL_ERR_MEM;
+		}
+	}
+
+	if ( q == NULL ) {
+		/* no more */
+		LDAP_FREE( url );
+		*ludpp = ludp;
+		return LDAP_URL_SUCCESS;
+	}
+
+	/* scan forward for '?' that may marks end of extensions */
+	p = q;
+	q = strchr( p, '?' );
+
+	if( q != NULL ) {
+		/* extra '?' */
+		LDAP_FREE( url );
+		ldap_free_urldesc( ludp );
+		return LDAP_URL_ERR_BADURL;
+	}
+
+	/* parse the extensions */
+	ludp->lud_exts = ldap_str2charray( p, "," );
+
+	if( ludp->lud_exts == NULL ) {
+		LDAP_FREE( url );
+		ldap_free_urldesc( ludp );
+		return LDAP_URL_ERR_BADEXTS;
+	}
+
+	for( i=0; ludp->lud_exts[i] != NULL; i++ ) {
+		ldap_pvt_hex_unescape( ludp->lud_exts[i] );
+
+		if( *ludp->lud_exts[i] == '!' ) {
+			/* count the number of critical extensions */
+			ludp->lud_crit_exts++;
+		}
+	}
+
+	if( i == 0 ) {
+		/* must have 1 or more */
+		LDAP_FREE( url );
+		ldap_free_urldesc( ludp );
+		return LDAP_URL_ERR_BADEXTS;
+	}
+
+	/* no more */
+	*ludpp = ludp;
+	LDAP_FREE( url );
+	return LDAP_URL_SUCCESS;
+}
+
+static int
+ldap_url_parse( LDAP_CONST char *url_in, LDAPURLDesc **ludpp )
+{
+	int rc = ldap_url_parse_ext( url_in, ludpp );
+
+	if( rc != LDAP_URL_SUCCESS ) {
+		return rc;
+	}
+
+	if ((*ludpp)->lud_scope == LDAP_SCOPE_DEFAULT) {
+		(*ludpp)->lud_scope = LDAP_SCOPE_BASE;
+	}
+
+	if ((*ludpp)->lud_host != NULL && *(*ludpp)->lud_host == '\0') {
+		LDAP_FREE( (*ludpp)->lud_host );
+		(*ludpp)->lud_host = NULL;
+	}
+
+	if ((*ludpp)->lud_port == 0) {
+		if( strcmp((*ludpp)->lud_scheme, "ldap") == 0 ) {
+			(*ludpp)->lud_port = LDAP_PORT;
+#ifdef LDAP_CONNECTIONLESS
+		} else if( strcmp((*ludpp)->lud_scheme, "cldap") == 0 ) {
+			(*ludpp)->lud_port = LDAP_PORT;
+#endif
+		} else if( strcmp((*ludpp)->lud_scheme, "ldaps") == 0 ) {
+			(*ludpp)->lud_port = LDAPS_PORT;
+		}
+	}
+
+	return rc;
+}
+