request.c

pgp soucecode pgp soucecode

			    &ld->ld_sb ) ? "  (default)" : "" );
		}
		fprintf( stderr, "  refcnt: %d  status: %s\n", lc->lconn_refcnt,
		    ( lc->lconn_status == LDAP_CONNST_NEEDSOCKET ) ?
		    "NeedSocket" : ( lc->lconn_status ==
		    LDAP_CONNST_CONNECTING ) ? "Connecting" : "Connected" );
		fprintf( stderr, "  last used: %s\n",
		    ctime( &lc->lconn_lastused ));
		if ( !all ) {
			break;
		}
	}
}


void
dump_requests_and_responses( LDAP *ld )
{
	LDAPRequest	*lr;
	LDAPMessage	*lm, *l;

	fprintf( stderr, "** Outstanding Requests:\n" );
	if (( lr = ld->ld_requests ) == NULL ) {
		fprintf( stderr, "   Empty\n" );
	}
	for ( ; lr != NULL; lr = lr->lr_next ) {
	    fprintf( stderr, " * msgid %d,  origid %d, status %s\n",
		lr->lr_msgid, lr->lr_origid, ( lr->lr_status ==
		LDAP_REQST_INPROGRESS ) ? "InProgress" :
		( lr->lr_status == LDAP_REQST_CHASINGREFS ) ? "ChasingRefs" :
		( lr->lr_status == LDAP_REQST_NOTCONNECTED ) ? "NotConnected" :
		"Writing" );
	    fprintf( stderr, "   outstanding referrals %d, parent count %d\n",
		    lr->lr_outrefcnt, lr->lr_parentcnt );
	}

	fprintf( stderr, "** Response Queue:\n" );
	if (( lm = ld->ld_responses ) == NULLMSG ) {
		fprintf( stderr, "   Empty\n" );
	}
	for ( ; lm != NULLMSG; lm = lm->lm_next ) {
		fprintf( stderr, " * msgid %d,  type %d\n",
		    lm->lm_msgid, lm->lm_msgtype );
		if (( l = lm->lm_chain ) != NULL ) {
			fprintf( stderr, "   chained responses:\n" );
			for ( ; l != NULLMSG; l = l->lm_chain ) {
				fprintf( stderr,
				    "  * msgid %d,  type %d\n",
				    l->lm_msgid, l->lm_msgtype );
			}
		}
	}
}
#endif /* LDAP_DEBUG */


void
free_request( LDAP *ld, LDAPRequest *lr )
{
	LDAPRequest	*tmplr, *nextlr;

	Debug( LDAP_DEBUG_TRACE, "free_request (origid %d, msgid %d)\n",
		lr->lr_origid, lr->lr_msgid, 0 );

	if ( lr->lr_parent != NULL ) {
		--lr->lr_parent->lr_outrefcnt;
	} else {
		/* free all referrals (child requests) */
		for ( tmplr = lr->lr_refnext; tmplr != NULL; tmplr = nextlr ) {
			nextlr = tmplr->lr_refnext;
			free_request( ld, tmplr );
		}
	}

	if ( lr->lr_prev == NULL ) {
		ld->ld_requests = lr->lr_next;
	} else {
		lr->lr_prev->lr_next = lr->lr_next;
	}

	if ( lr->lr_next != NULL ) {
		lr->lr_next->lr_prev = lr->lr_prev;
	}

	if ( lr->lr_ber != NULL ) {
		ber_free( lr->lr_ber, 1 );
	}

	if ( lr->lr_res_error != NULL ) {
		free( lr->lr_res_error );
	}

	if ( lr->lr_res_matched != NULL ) {
		free( lr->lr_res_matched );
	}

	free( lr );
}


static void
free_servers( LDAPServer *srvlist )
{
    LDAPServer	*nextsrv;

    while ( srvlist != NULL ) {
	nextsrv = srvlist->lsrv_next;
	if ( srvlist->lsrv_dn != NULL ) {
		free( srvlist->lsrv_dn );
	}
	if ( srvlist->lsrv_host != NULL ) {
		free( srvlist->lsrv_host );
	}
	free( srvlist );
	srvlist = nextsrv;
    }
}
#endif /* LDAP_REFERRALS || LDAP_DNS */


#ifdef LDAP_REFERRALS
/*
 * XXX merging of errors in this routine needs to be improved
 */
int
chase_referrals( LDAP *ld, LDAPRequest *lr, char **errstrp, int *hadrefp )
{
	int		rc, count, len, newdn;
#ifdef LDAP_DNS
	int		ldapref;
#endif /* LDAP_DNS */
	char		*p, *ports, *ref, *tmpref, *refdn, *unfollowed;
	LDAPRequest	*origreq;
	LDAPServer	*srv;
	BerElement	*ber;

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

	ld->ld_errno = LDAP_SUCCESS;	/* optimistic */
	*hadrefp = 0;

	if ( *errstrp == NULL ) {
		return( 0 );
	}

	len = strlen( *errstrp );
	for ( p = *errstrp; len >= LDAP_REF_STR_LEN; ++p, --len ) {
		if (( *p == 'R' || *p == 'r' ) && strncasecmp( p,
		    LDAP_REF_STR, LDAP_REF_STR_LEN ) == 0 ) {
			*p = '\0';
			p += LDAP_REF_STR_LEN;
			break;
		}
	}

	if ( len < LDAP_REF_STR_LEN ) {
		return( 0 );
	}

	if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
		Debug( LDAP_DEBUG_ANY,
		    "more than %d referral hops (dropping)\n",
		    ld->ld_refhoplimit, 0, 0 );
		    /* XXX report as error in ld->ld_errno? */
		    return( 0 );
	}

	/* find original request */
	for ( origreq = lr; origreq->lr_parent != NULL;
	     origreq = origreq->lr_parent ) {
		;
	}

	unfollowed = NULL;
	rc = count = 0;

	/* parse out & follow referrals */
	for ( ref = p; rc == 0 && ref != NULL; ref = p ) {
#ifdef LDAP_DNS
		ldapref = 0;
#endif /* LDAP_DNS */

		if (( p = strchr( ref, '\n' )) != NULL ) {
			*p++ = '\0';
		} else {
			p = NULL;
		}

		len = strlen( ref );
		if ( len > LDAP_LDAP_REF_STR_LEN && strncasecmp( ref,
		    LDAP_LDAP_REF_STR, LDAP_LDAP_REF_STR_LEN ) == 0 ) {
			Debug( LDAP_DEBUG_TRACE,
			    "chasing LDAP referral: <%s>\n", ref, 0, 0 );
#ifdef LDAP_DNS
			ldapref = 1;
#endif /* LDAP_DNS */
			tmpref = ref + LDAP_LDAP_REF_STR_LEN;
#ifdef LDAP_DNS
		} else if ( len > LDAP_DX_REF_STR_LEN && strncasecmp( ref,
		    LDAP_DX_REF_STR, LDAP_DX_REF_STR_LEN ) == 0 ) {
			Debug( LDAP_DEBUG_TRACE,
			    "chasing DX referral: <%s>\n", ref, 0, 0 );
			tmpref = ref + LDAP_DX_REF_STR_LEN;
#endif /* LDAP_DNS */
		} else {
			Debug( LDAP_DEBUG_TRACE,
			    "ignoring unknown referral <%s>\n", ref, 0, 0 );
			rc = append_referral( ld, &unfollowed, ref );
			*hadrefp = 1;
			continue;
		}

		*hadrefp = 1;
		if (( refdn = strchr( tmpref, '/' )) != NULL ) {
			*refdn++ = '\0';
			newdn = 1;
		} else {
			newdn = 0;
		}

		if (( ber = re_encode_request( ld, origreq->lr_ber,
		    ++ld->ld_msgid, &refdn )) == NULL ) {
			return( -1 );
		}

#ifdef LDAP_DNS
		if ( ldapref ) {
#endif /* LDAP_DNS */
			if (( srv = (LDAPServer *)calloc( 1,
			    sizeof( LDAPServer ))) == NULL ) {
				ber_free( ber, 1 );
				ld->ld_errno = LDAP_NO_MEMORY;
				return( -1 );
			}

			if (( srv->lsrv_host = strdup( tmpref )) == NULL ) {
				free( (char *)srv );
				ber_free( ber, 1 );
				ld->ld_errno = LDAP_NO_MEMORY;
				return( -1 );
			}

			if (( ports = strchr( srv->lsrv_host, ':' )) != NULL ) {
				*ports++ = '\0';
				srv->lsrv_port = atoi( ports );
			} else {
				srv->lsrv_port = LDAP_PORT;
			}
#ifdef LDAP_DNS
		} else {
			srv = dn2servers( ld, tmpref );
		}
#endif /* LDAP_DNS */

		if ( srv != NULL && send_server_request( ld, ber, ld->ld_msgid,
		    lr, srv, NULL, 1 ) >= 0 ) {
			++count;
		} else {
			Debug( LDAP_DEBUG_ANY,
			    "Unable to chase referral (%s)\n", 
			    ldap_err2string( ld->ld_errno ), 0, 0 );
			rc = append_referral( ld, &unfollowed, ref );
		}

		if ( !newdn && refdn != NULL ) {
			free( refdn );
		}
	}

	free( *errstrp );
	*errstrp = unfollowed;

	return(( rc == 0 ) ? count : rc );
}


int
append_referral( LDAP *ld, char **referralsp, char *s )
{
	int	first;

	if ( *referralsp == NULL ) {
		first = 1;
		*referralsp = (char *)malloc( strlen( s ) + LDAP_REF_STR_LEN
		    + 1 );
	} else {
		first = 0;
		*referralsp = (char *)realloc( *referralsp,
		    strlen( *referralsp ) + strlen( s ) + 2 );
	}

	if ( *referralsp == NULL ) {
		ld->ld_errno = LDAP_NO_MEMORY;
		return( -1 );
	}

	if ( first ) {
		strcpy( *referralsp, LDAP_REF_STR );
	} else {
		strcat( *referralsp, "\n" );
	}
	strcat( *referralsp, s );

	return( 0 );
}



static BerElement *
re_encode_request( LDAP *ld, BerElement *origber, int msgid, char **dnp )
{
/*
 * XXX this routine knows way too much about how the lber library works!
 */
	unsigned long	along, tag;
	long		ver;
	int		rc;
	BerElement	tmpber, *ber;
	char		*orig_dn;

	Debug( LDAP_DEBUG_TRACE,
	    "re_encode_request: new msgid %d, new dn <%s>\n",
	    msgid, ( *dnp == NULL ) ? "NONE" : *dnp, 0 );

	tmpber = *origber;

	/*
	 * all LDAP requests are sequences that start with a message id,
	 * followed by a sequence that is tagged with the operation code
	 */
	if ( ber_scanf( &tmpber, "{i", &along ) != LDAP_TAG_MSGID ||
	    ( tag = ber_skip_tag( &tmpber, &along )) == LBER_DEFAULT ) {
                ld->ld_errno = LDAP_DECODING_ERROR;
		return( NULL );
	}

        if (( ber = alloc_ber_with_options( ld )) == NULLBER ) {
                return( NULL );
        }

	/* bind requests have a version number before the DN & other stuff */
	if ( tag == LDAP_REQ_BIND && ber_get_int( &tmpber, (long *)&ver ) ==
	    LBER_DEFAULT ) {
                ld->ld_errno = LDAP_DECODING_ERROR;
		ber_free( ber, 1 );
		return( NULL );
	}

	/* the rest of the request is the DN followed by other stuff */
	if ( ber_get_stringa( &tmpber, &orig_dn ) == LBER_DEFAULT ) {
		ber_free( ber, 1 );
		return( NULL );
	}

	if ( *dnp == NULL ) {
		*dnp = orig_dn;
	} else {
		free( orig_dn );
	}

	if ( tag == LDAP_REQ_BIND ) {
		rc = ber_printf( ber, "{it{is", msgid, tag, ver, *dnp );
	} else {
		rc = ber_printf( ber, "{it{s", msgid, tag, *dnp );
	}

	if ( rc == -1 ) {
		ber_free( ber, 1 );
		return( NULL );
	}

	if ( ber_write( ber, tmpber.ber_ptr, ( tmpber.ber_end -
	    tmpber.ber_ptr ), 0 ) != ( tmpber.ber_end - tmpber.ber_ptr ) ||
	    ber_printf( ber, "}}" ) == -1 ) {
		ld->ld_errno = LDAP_ENCODING_ERROR;
		ber_free( ber, 1 );
		return( NULL );
	}

#ifdef LDAP_DEBUG
	if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
		Debug( LDAP_DEBUG_ANY, "re_encode_request new request is:\n",
		    0, 0, 0 );
		ber_dump( ber, 0 );
	}
#endif /* LDAP_DEBUG */

	return( ber );
}


LDAPRequest *
find_request_by_msgid( LDAP *ld, int msgid )
{
    	LDAPRequest	*lr;

	for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
		if ( msgid == lr->lr_msgid ) {
			break;
		}
	}

	return( lr );
}
#endif /* LDAP_REFERRALS */


#ifdef LDAP_DNS
static LDAPServer *
dn2servers( LDAP *ld, char *dn )	/* dn can also be a domain.... */
{
	char		*p, *domain, *host, *server_dn, **dxs;
	int		i, port;
	LDAPServer	*srvlist, *prevsrv, *srv;

	if (( domain = strrchr( dn, '@' )) != NULL ) {
		++domain;
	} else {
		domain = dn;
	}

	if (( dxs = getdxbyname( domain )) == NULL ) {
		ld->ld_errno = LDAP_NO_MEMORY;
		return( NULL );
	}

	srvlist = NULL;

	for ( i = 0; dxs[ i ] != NULL; ++i ) {
		port = LDAP_PORT;
		server_dn = NULL;
		if ( strchr( dxs[ i ], ':' ) == NULL ) {
			host = dxs[ i ];
		} else if ( strlen( dxs[ i ] ) >= 7 &&
		    strncmp( dxs[ i ], "ldap://", 7 ) == 0 ) {
			host = dxs[ i ] + 7;
			if (( p = strchr( host, ':' )) == NULL ) {
				p = host;
			} else {
				*p++ = '\0';
				port = atoi( p );
			}
			if (( p = strchr( p, '/' )) != NULL ) {
				server_dn = ++p;
				if ( *server_dn == '\0' ) {
					server_dn = NULL;
				}
			}
		} else {
			host = NULL;
		}

		if ( host != NULL ) {	/* found a server we can use */
			if (( srv = (LDAPServer *)calloc( 1,
			    sizeof( LDAPServer ))) == NULL ) {
				free_servers( srvlist );
				srvlist = NULL;
				break;		/* exit loop & return */
			}

			/* add to end of list of servers */
			if ( srvlist == NULL ) {
				srvlist = srv;
			} else {
				prevsrv->lsrv_next = srv;
			}
			prevsrv = srv;
			
			/* copy in info. */
			if (( srv->lsrv_host = strdup( host )) == NULL ||
			    ( server_dn != NULL && ( srv->lsrv_dn =
			    strdup( server_dn )) == NULL )) {
				free_servers( srvlist );
				srvlist = NULL;
				break;		/* exit loop & return */
			}
			srv->lsrv_port = port;
		}
	}

	ldap_value_free( dxs );

	if ( srvlist == NULL ) {
		ld->ld_errno = LDAP_SERVER_DOWN;
	}

	return( srvlist );
}
#endif /* LDAP_DNS */