#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#if defined( DOS ) || defined( _WIN32 )
#include <malloc.h>
#include "msdos.h"
#else /* DOS */
#include <sys/types.h>
#include <sys/socket.h>
#endif /* DOS */

#include "lber.h"
#include "ldap.h"

struct ldaperror {
	int	e_code;
	char	*e_reason;
};

static struct ldaperror ldap_errlist[] = {
	{LDAP_SUCCESS, 					"Success" },
	{LDAP_OPERATIONS_ERROR, 		"Operations error" },
	{LDAP_PROTOCOL_ERROR, 			"Protocol error" },
	{LDAP_TIMELIMIT_EXCEEDED,		"Timelimit exceeded" },
	{LDAP_SIZELIMIT_EXCEEDED, 		"Sizelimit exceeded" },
	{LDAP_COMPARE_FALSE, 			"Compare false" },
	{LDAP_COMPARE_TRUE, 			"Compare true" },
	{LDAP_STRONG_AUTH_NOT_SUPPORTED, "Strong authentication not supported" },
	{LDAP_STRONG_AUTH_REQUIRED, 	"Strong authentication required" },
	{LDAP_PARTIAL_RESULTS, 			"Partial results and referral received" },
	{LDAP_NO_SUCH_ATTRIBUTE, 		"No such attribute" },
	{LDAP_UNDEFINED_TYPE, 			"Undefined attribute type" },
	{LDAP_INAPPROPRIATE_MATCHING, 	"Inappropriate matching" },
	{LDAP_CONSTRAINT_VIOLATION, 	"Constraint violation" },
	{LDAP_TYPE_OR_VALUE_EXISTS, 	"Type or value exists" },
	{LDAP_INVALID_SYNTAX, 			"Invalid syntax" },
	{LDAP_NO_SUCH_OBJECT, 			"No such object" },
	{LDAP_ALIAS_PROBLEM, 			"Alias problem" },
	{LDAP_INVALID_DN_SYNTAX,		"Invalid DN syntax" },
	{LDAP_IS_LEAF, 					"Object is a leaf" },
	{LDAP_ALIAS_DEREF_PROBLEM,	 	"Alias dereferencing problem" },
	{LDAP_INAPPROPRIATE_AUTH, 		"Inappropriate authentication" },
	{LDAP_INVALID_CREDENTIALS, 		"Invalid credentials" },
	{LDAP_INSUFFICIENT_ACCESS, 		"Insufficient access" },
	{LDAP_BUSY, 					"DSA is busy" },
	{LDAP_UNAVAILABLE, 				"DSA is unavailable" },
	{LDAP_UNWILLING_TO_PERFORM, 	"DSA is unwilling to perform" },
	{LDAP_LOOP_DETECT, 				"Loop detected" },
	{LDAP_NAMING_VIOLATION, 		"Naming violation" },
	{LDAP_OBJECT_CLASS_VIOLATION, 	"Object class violation" },
	{LDAP_NOT_ALLOWED_ON_NONLEAF, 	"Operation not allowed on nonleaf" },
	{LDAP_NOT_ALLOWED_ON_RDN,	 	"Operation not allowed on RDN" },
	{LDAP_ALREADY_EXISTS, 			"Already exists" },
	{LDAP_NO_OBJECT_CLASS_MODS, 	"Cannot modify object class" },
	{LDAP_RESULTS_TOO_LARGE,		"Results too large" },
	{LDAP_OTHER, 					"Unknown error" },
	{LDAP_SERVER_DOWN,				"Can't contact LDAP server" },
	{LDAP_LOCAL_ERROR,				"Local error" },
	{LDAP_ENCODING_ERROR,			"Encoding error" },
	{LDAP_DECODING_ERROR,			"Decoding error" },
	{LDAP_TIMEOUT,					"Timed out" },
	{LDAP_AUTH_UNKNOWN,				"Unknown authentication method" },
	{LDAP_FILTER_ERROR,				"Bad search filter" },
	{LDAP_USER_CANCELLED,			"User cancelled operation" },
	{LDAP_PARAM_ERROR,				"Bad parameter to an ldap routine" },
	{LDAP_NO_MEMORY,				"Out of memory" },
	{-1, 0 }
};

char *
ldap_err2string( int err )
{
	int	i;

	Debug( LDAP_DEBUG_TRACE, "ldap_err2string\n", 0, 0, 0 );

	for ( i = 0; ldap_errlist[i].e_code != -1; i++ ) {
		if ( err == ldap_errlist[i].e_code )
			return( ldap_errlist[i].e_reason );
	}

	return( "Unknown error" );
}

#ifndef NO_USERINTERFACE
void
ldap_perror( LDAP *ld, char *s )
{
	int	i;

	Debug( LDAP_DEBUG_TRACE, "ldap_perror\n", 0, 0, 0 );

	if ( ld == NULL ) {
		perror( s );
		return;
	}

	for ( i = 0; ldap_errlist[i].e_code != -1; i++ ) {
		if ( ld->ld_errno == ldap_errlist[i].e_code ) {
			fprintf( stderr, "%s: %s\n", s,
			    ldap_errlist[i].e_reason );
			if ( ld->ld_matched != NULL && *ld->ld_matched != '\0' )
				fprintf( stderr, "%s: matched: %s\n", s,
				    ld->ld_matched );
			if ( ld->ld_error != NULL && *ld->ld_error != '\0' )
				fprintf( stderr, "%s: additional info: %s\n",
				    s, ld->ld_error );
			fflush( stderr );
			return;
		}
	}

	fprintf( stderr, "%s: Not an LDAP errno %d\n", s, ld->ld_errno );
	fflush( stderr );
}

#else

void
ldap_perror( LDAP *ld, char *s )
{
}

#endif /* NO_USERINTERFACE */


int
ldap_result2error( LDAP *ld, LDAPMessage *r, int freeit )
{
	LDAPMessage	*lm;
	BerElement	ber;
	long		along;
	int		rc;

	Debug( LDAP_DEBUG_TRACE, "ldap_result2error\n", 0, 0, 0 );

	if ( r == NULLMSG )
		return( LDAP_PARAM_ERROR );

	for ( lm = r; lm->lm_chain != NULL; lm = lm->lm_chain )
		;	/* NULL */

	if ( ld->ld_error ) {
		free( ld->ld_error );
		ld->ld_error = NULL;
	}
	if ( ld->ld_matched ) {
		free( ld->ld_matched );
		ld->ld_matched = NULL;
	}

	ber = *(lm->lm_ber);
	if ( ld->ld_version == LDAP_VERSION2 ) {
		rc = ber_scanf( &ber, "{iaa}", &along, &ld->ld_matched,
		    &ld->ld_error );
	} else {
		rc = ber_scanf( &ber, "{ia}", &along, &ld->ld_error );
	}
	if ( rc == LBER_ERROR ) {
		ld->ld_errno = LDAP_DECODING_ERROR;
	} else {
		ld->ld_errno = (int) along;
	}

	if ( freeit )
		ldap_msgfree( r );

	return( ld->ld_errno );
}