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[netbsd-mini2440.git] / external / bsd / openldap / dist / libraries / libldap / url.c
blob94da4ad32c2f638d5e999db1f4a6b766fe55b2aa
1 /* LIBLDAP url.c -- LDAP URL (RFC 4516) related routines */
2 /* $OpenLDAP: pkg/ldap/libraries/libldap/url.c,v 1.94.2.8 2008/02/11 23:41:37 quanah Exp $ */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 *
5 * Copyright 1998-2008 The OpenLDAP Foundation.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted only as authorized by the OpenLDAP
10 * Public License.
11 *
12 * A copy of this license is available in the file LICENSE in the
13 * top-level directory of the distribution or, alternatively, at
14 * <http://www.OpenLDAP.org/license.html>.
15 */
16 /* Portions Copyright (c) 1996 Regents of the University of Michigan.
17 * All rights reserved.
18 */
19
20
21 /*
22 * LDAP URLs look like this:
23 * ldap[is]://host[:port][/[dn[?[attributes][?[scope][?[filter][?exts]]]]]]
24 *
25 * where:
26 * attributes is a comma separated list
27 * scope is one of these three strings: base one sub (default=base)
28 * filter is an string-represented filter as in RFC 4515
29 *
30 * e.g., ldap://host:port/dc=com?o,cn?base?(o=openldap)?extension
31 *
32 * We also tolerate URLs that look like: <ldapurl> and <URL:ldapurl>
33 */
34
35 #include "portable.h"
36
37 #include <stdio.h>
38
39 #include <ac/stdlib.h>
40 #include <ac/ctype.h>
41
42 #include <ac/socket.h>
43 #include <ac/string.h>
44 #include <ac/time.h>
45
46 #include "ldap-int.h"
47
48 /* local functions */
49 static const char* skip_url_prefix LDAP_P((
50 const char *url,
51 int *enclosedp,
52 const char **scheme ));
53
54 int ldap_pvt_url_scheme2proto( const char *scheme )
55 {
56 assert( scheme != NULL );
57
58 if( scheme == NULL ) {
59 return -1;
60 }
61
62 if( strcmp("ldap", scheme) == 0 ) {
63 return LDAP_PROTO_TCP;
64 }
65
66 if( strcmp("ldapi", scheme) == 0 ) {
67 return LDAP_PROTO_IPC;
68 }
69
70 if( strcmp("ldaps", scheme) == 0 ) {
71 return LDAP_PROTO_TCP;
72 }
73 #ifdef LDAP_CONNECTIONLESS
74 if( strcmp("cldap", scheme) == 0 ) {
75 return LDAP_PROTO_UDP;
76 }
77 #endif
78
79 return -1;
80 }
81
82 int ldap_pvt_url_scheme_port( const char *scheme, int port )
83 {
84 assert( scheme != NULL );
85
86 if( port ) return port;
87 if( scheme == NULL ) return port;
88
89 if( strcmp("ldap", scheme) == 0 ) {
90 return LDAP_PORT;
91 }
92
93 if( strcmp("ldapi", scheme) == 0 ) {
94 return -1;
95 }
96
97 if( strcmp("ldaps", scheme) == 0 ) {
98 return LDAPS_PORT;
99 }
100
101 #ifdef LDAP_CONNECTIONLESS
102 if( strcmp("cldap", scheme) == 0 ) {
103 return LDAP_PORT;
104 }
105 #endif
106
107 return -1;
108 }
109
110 int
111 ldap_pvt_url_scheme2tls( const char *scheme )
112 {
113 assert( scheme != NULL );
114
115 if( scheme == NULL ) {
116 return -1;
117 }
118
119 return strcmp("ldaps", scheme) == 0;
120 }
121
122 int
123 ldap_is_ldap_url( LDAP_CONST char *url )
124 {
125 int enclosed;
126 const char * scheme;
127
128 if( url == NULL ) {
129 return 0;
130 }
131
132 if( skip_url_prefix( url, &enclosed, &scheme ) == NULL ) {
133 return 0;
134 }
135
136 return 1;
137 }
138
139 int
140 ldap_is_ldaps_url( LDAP_CONST char *url )
141 {
142 int enclosed;
143 const char * scheme;
144
145 if( url == NULL ) {
146 return 0;
147 }
148
149 if( skip_url_prefix( url, &enclosed, &scheme ) == NULL ) {
150 return 0;
151 }
152
153 return strcmp(scheme, "ldaps") == 0;
154 }
155
156 int
157 ldap_is_ldapi_url( LDAP_CONST char *url )
158 {
159 int enclosed;
160 const char * scheme;
161
162 if( url == NULL ) {
163 return 0;
164 }
165
166 if( skip_url_prefix( url, &enclosed, &scheme ) == NULL ) {
167 return 0;
168 }
169
170 return strcmp(scheme, "ldapi") == 0;
171 }
172
173 #ifdef LDAP_CONNECTIONLESS
174 int
175 ldap_is_ldapc_url( LDAP_CONST char *url )
176 {
177 int enclosed;
178 const char * scheme;
179
180 if( url == NULL ) {
181 return 0;
182 }
183
184 if( skip_url_prefix( url, &enclosed, &scheme ) == NULL ) {
185 return 0;
186 }
187
188 return strcmp(scheme, "cldap") == 0;
189 }
190 #endif
191
192 static const char*
193 skip_url_prefix(
194 const char *url,
195 int *enclosedp,
196 const char **scheme )
197 {
198 /*
199 * return non-zero if this looks like a LDAP URL; zero if not
200 * if non-zero returned, *urlp will be moved past "ldap://" part of URL
201 */
202 const char *p;
203
204 if ( url == NULL ) {
205 return( NULL );
206 }
207
208 p = url;
209
210 /* skip leading '<' (if any) */
211 if ( *p == '<' ) {
212 *enclosedp = 1;
213 ++p;
214 } else {
215 *enclosedp = 0;
216 }
217
218 /* skip leading "URL:" (if any) */
219 if ( strncasecmp( p, LDAP_URL_URLCOLON, LDAP_URL_URLCOLON_LEN ) == 0 ) {
220 p += LDAP_URL_URLCOLON_LEN;
221 }
222
223 /* check for "ldap://" prefix */
224 if ( strncasecmp( p, LDAP_URL_PREFIX, LDAP_URL_PREFIX_LEN ) == 0 ) {
225 /* skip over "ldap://" prefix and return success */
226 p += LDAP_URL_PREFIX_LEN;
227 *scheme = "ldap";
228 return( p );
229 }
230
231 /* check for "ldaps://" prefix */
232 if ( strncasecmp( p, LDAPS_URL_PREFIX, LDAPS_URL_PREFIX_LEN ) == 0 ) {
233 /* skip over "ldaps://" prefix and return success */
234 p += LDAPS_URL_PREFIX_LEN;
235 *scheme = "ldaps";
236 return( p );
237 }
238
239 /* check for "ldapi://" prefix */
240 if ( strncasecmp( p, LDAPI_URL_PREFIX, LDAPI_URL_PREFIX_LEN ) == 0 ) {
241 /* skip over "ldapi://" prefix and return success */
242 p += LDAPI_URL_PREFIX_LEN;
243 *scheme = "ldapi";
244 return( p );
245 }
246
247 #ifdef LDAP_CONNECTIONLESS
248 /* check for "cldap://" prefix */
249 if ( strncasecmp( p, LDAPC_URL_PREFIX, LDAPC_URL_PREFIX_LEN ) == 0 ) {
250 /* skip over "cldap://" prefix and return success */
251 p += LDAPC_URL_PREFIX_LEN;
252 *scheme = "cldap";
253 return( p );
254 }
255 #endif
256
257 return( NULL );
258 }
259
260 int
261 ldap_pvt_scope2bv( int scope, struct berval *bv )
262 {
263 switch ( scope ) {
264 case LDAP_SCOPE_BASE:
265 BER_BVSTR( bv, "base" );
266 break;
267
268 case LDAP_SCOPE_ONELEVEL:
269 BER_BVSTR( bv, "one" );
270 break;
271
272 case LDAP_SCOPE_SUBTREE:
273 BER_BVSTR( bv, "sub" );
274 break;
275
276 case LDAP_SCOPE_SUBORDINATE:
277 BER_BVSTR( bv, "subordinate" );
278 break;
279
280 default:
281 return LDAP_OTHER;
282 }
283
284 return LDAP_SUCCESS;
285 }
286
287 const char *
288 ldap_pvt_scope2str( int scope )
289 {
290 struct berval bv;
291
292 if ( ldap_pvt_scope2bv( scope, &bv ) == LDAP_SUCCESS ) {
293 return bv.bv_val;
294 }
295
296 return NULL;
297 }
298
299 int
300 ldap_pvt_bv2scope( struct berval *bv )
301 {
302 static struct {
303 struct berval bv;
304 int scope;
305 } v[] = {
306 { BER_BVC( "one" ), LDAP_SCOPE_ONELEVEL },
307 { BER_BVC( "onelevel" ), LDAP_SCOPE_ONELEVEL },
308 { BER_BVC( "base" ), LDAP_SCOPE_BASE },
309 { BER_BVC( "sub" ), LDAP_SCOPE_SUBTREE },
310 { BER_BVC( "subtree" ), LDAP_SCOPE_SUBTREE },
311 { BER_BVC( "subord" ), LDAP_SCOPE_SUBORDINATE },
312 { BER_BVC( "subordinate" ), LDAP_SCOPE_SUBORDINATE },
313 { BER_BVC( "children" ), LDAP_SCOPE_SUBORDINATE },
314 { BER_BVNULL, -1 }
315 };
316 int i;
317
318 for ( i = 0; v[ i ].scope != -1; i++ ) {
319 if ( ber_bvstrcasecmp( bv, &v[ i ].bv ) == 0 ) {
320 return v[ i ].scope;
321 }
322 }
323
324 return( -1 );
325 }
326
327 int
328 ldap_pvt_str2scope( const char *p )
329 {
330 struct berval bv;
331
332 ber_str2bv( p, 0, 0, &bv );
333
334 return ldap_pvt_bv2scope( &bv );
335 }
336
337 static const char hex[] = "0123456789ABCDEF";
338
339 #define URLESC_NONE 0x0000U
340 #define URLESC_COMMA 0x0001U
341 #define URLESC_SLASH 0x0002U
342
343 static int
344 hex_escape_len( const char *s, unsigned list )
345 {
346 int len;
347
348 if ( s == NULL ) {
349 return 0;
350 }
351
352 for ( len = 0; s[0]; s++ ) {
353 switch ( s[0] ) {
354 /* RFC 2396: reserved */
355 case '?':
356 len += 3;
357 break;
358
359 case ',':
360 if ( list & URLESC_COMMA ) {
361 len += 3;
362 } else {
363 len++;
364 }
365 break;
366
367 case '/':
368 if ( list & URLESC_SLASH ) {
369 len += 3;
370 } else {
371 len++;
372 }
373 break;
374
375 case ';':
376 case ':':
377 case '@':
378 case '&':
379 case '=':
380 case '+':
381 case '$':
382
383 /* RFC 2396: unreserved mark */
384 case '-':
385 case '_':
386 case '.':
387 case '!':
388 case '~':
389 case '*':
390 case '\'':
391 case '(':
392 case ')':
393 len++;
394 break;
395
396 /* RFC 2396: unreserved alphanum */
397 default:
398 if ( !isalnum( (unsigned char) s[0] ) ) {
399 len += 3;
400 } else {
401 len++;
402 }
403 break;
404 }
405 }
406
407 return len;
408 }
409
410 static int
411 hex_escape( char *buf, int len, const char *s, unsigned list )
412 {
413 int i;
414 int pos;
415
416 if ( s == NULL ) {
417 return 0;
418 }
419
420 for ( pos = 0, i = 0; s[i] && pos < len; i++ ) {
421 int escape = 0;
422
423 switch ( s[i] ) {
424 /* RFC 2396: reserved */
425 case '?':
426 escape = 1;
427 break;
428
429 case ',':
430 if ( list & URLESC_COMMA ) {
431 escape = 1;
432 }
433 break;
434
435 case '/':
436 if ( list & URLESC_SLASH ) {
437 escape = 1;
438 }
439 break;
440
441 case ';':
442 case ':':
443 case '@':
444 case '&':
445 case '=':
446 case '+':
447 case '$':
448
449 /* RFC 2396: unreserved mark */
450 case '-':
451 case '_':
452 case '.':
453 case '!':
454 case '~':
455 case '*':
456 case '\'':
457 case '(':
458 case ')':
459 break;
460
461 /* RFC 2396: unreserved alphanum */
462 default:
463 if ( !isalnum( (unsigned char) s[i] ) ) {
464 escape = 1;
465 }
466 break;
467 }
468
469 if ( escape ) {
470 buf[pos++] = '%';
471 buf[pos++] = hex[ (s[i] >> 4) & 0x0f ];
472 buf[pos++] = hex[ s[i] & 0x0f ];
473
474 } else {
475 buf[pos++] = s[i];
476 }
477 }
478
479 buf[pos] = '\0';
480
481 return pos;
482 }
483
484 static int
485 hex_escape_len_list( char **s, unsigned flags )
486 {
487 int len;
488 int i;
489
490 if ( s == NULL ) {
491 return 0;
492 }
493
494 len = 0;
495 for ( i = 0; s[i] != NULL; i++ ) {
496 if ( len ) {
497 len++;
498 }
499 len += hex_escape_len( s[i], flags );
500 }
501
502 return len;
503 }
504
505 static int
506 hex_escape_list( char *buf, int len, char **s, unsigned flags )
507 {
508 int pos;
509 int i;
510
511 if ( s == NULL ) {
512 return 0;
513 }
514
515 pos = 0;
516 for ( i = 0; s[i] != NULL; i++ ) {
517 int curlen;
518
519 if ( pos ) {
520 buf[pos++] = ',';
521 len--;
522 }
523 curlen = hex_escape( &buf[pos], len, s[i], flags );
524 len -= curlen;
525 pos += curlen;
526 }
527
528 return pos;
529 }
530
531 static int
532 desc2str_len( LDAPURLDesc *u )
533 {
534 int sep = 0;
535 int len = 0;
536 int is_ipc = 0;
537 struct berval scope;
538
539 if ( u == NULL || u->lud_scheme == NULL ) {
540 return -1;
541 }
542
543 if ( !strcmp( "ldapi", u->lud_scheme )) {
544 is_ipc = 1;
545 }
546
547 if ( u->lud_exts ) {
548 len += hex_escape_len_list( u->lud_exts, URLESC_COMMA );
549 if ( !sep ) {
550 sep = 5;
551 }
552 }
553
554 if ( u->lud_filter ) {
555 len += hex_escape_len( u->lud_filter, URLESC_NONE );
556 if ( !sep ) {
557 sep = 4;
558 }
559 }
560
561 if ( ldap_pvt_scope2bv( u->lud_scope, &scope ) == LDAP_SUCCESS ) {
562 len += scope.bv_len;
563 if ( !sep ) {
564 sep = 3;
565 }
566 }
567
568 if ( u->lud_attrs ) {
569 len += hex_escape_len_list( u->lud_attrs, URLESC_NONE );
570 if ( !sep ) {
571 sep = 2;
572 }
573 }
574
575 if ( u->lud_dn && u->lud_dn[0] ) {
576 len += hex_escape_len( u->lud_dn, URLESC_NONE );
577 if ( !sep ) {
578 sep = 1;
579 }
580 };
581
582 len += sep;
583
584 if ( u->lud_port ) {
585 unsigned p = u->lud_port;
586 if ( p > 65535 )
587 return -1;
588
589 len += (p > 999 ? 5 + (p > 9999) : p > 99 ? 4 : 2 + (p > 9));
590 }
591
592 if ( u->lud_host && u->lud_host[0] ) {
593 len += hex_escape_len( u->lud_host, URLESC_SLASH );
594 if ( !is_ipc && strchr( u->lud_host, ':' )) {
595 len += 2; /* IPv6, [] */
596 }
597 }
598
599 len += strlen( u->lud_scheme ) + STRLENOF( "://" );
600
601 return len;
602 }
603
604 static int
605 desc2str( LDAPURLDesc *u, char *s, int len )
606 {
607 int i;
608 int sep = 0;
609 int sofar = 0;
610 int is_v6 = 0;
611 int is_ipc = 0;
612 struct berval scope = BER_BVNULL;
613
614 if ( u == NULL ) {
615 return -1;
616 }
617
618 if ( s == NULL ) {
619 return -1;
620 }
621
622 if ( u->lud_scheme && !strcmp( "ldapi", u->lud_scheme )) {
623 is_ipc = 1;
624 }
625
626 ldap_pvt_scope2bv( u->lud_scope, &scope );
627
628 if ( u->lud_exts ) {
629 sep = 5;
630 } else if ( u->lud_filter ) {
631 sep = 4;
632 } else if ( !BER_BVISEMPTY( &scope ) ) {
633 sep = 3;
634 } else if ( u->lud_attrs ) {
635 sep = 2;
636 } else if ( u->lud_dn && u->lud_dn[0] ) {
637 sep = 1;
638 }
639
640 if ( !is_ipc && u->lud_host && strchr( u->lud_host, ':' )) {
641 is_v6 = 1;
642 }
643
644 if ( u->lud_port ) {
645 sofar = sprintf( s, "%s://%s%s%s:%d", u->lud_scheme,
646 is_v6 ? "[" : "",
647 u->lud_host ? u->lud_host : "",
648 is_v6 ? "]" : "",
649 u->lud_port );
650 len -= sofar;
651
652 } else {
653 sofar = sprintf( s, "%s://", u->lud_scheme );
654 len -= sofar;
655 if ( u->lud_host && u->lud_host[0] ) {
656 if ( is_v6 ) {
657 s[sofar++] = '[';
658 len--;
659 }
660 i = hex_escape( &s[sofar], len, u->lud_host, URLESC_SLASH );
661 sofar += i;
662 len -= i;
663 if ( is_v6 ) {
664 s[sofar++] = ']';
665 len--;
666 }
667 }
668 }
669
670 assert( len >= 0 );
671
672 if ( sep < 1 ) {
673 goto done;
674 }
675
676 s[sofar++] = '/';
677 len--;
678
679 assert( len >= 0 );
680
681 if ( u->lud_dn && u->lud_dn[0] ) {
682 i = hex_escape( &s[sofar], len, u->lud_dn, URLESC_NONE );
683 sofar += i;
684 len -= i;
685
686 assert( len >= 0 );
687 }
688
689 if ( sep < 2 ) {
690 goto done;
691 }
692 s[sofar++] = '?';
693 len--;
694
695 assert( len >= 0 );
696
697 i = hex_escape_list( &s[sofar], len, u->lud_attrs, URLESC_NONE );
698 sofar += i;
699 len -= i;
700
701 assert( len >= 0 );
702
703 if ( sep < 3 ) {
704 goto done;
705 }
706 s[sofar++] = '?';
707 len--;
708
709 assert( len >= 0 );
710
711 if ( !BER_BVISNULL( &scope ) ) {
712 strcpy( &s[sofar], scope.bv_val );
713 sofar += scope.bv_len;
714 len -= scope.bv_len;
715 }
716
717 assert( len >= 0 );
718
719 if ( sep < 4 ) {
720 goto done;
721 }
722 s[sofar++] = '?';
723 len--;
724
725 assert( len >= 0 );
726
727 i = hex_escape( &s[sofar], len, u->lud_filter, URLESC_NONE );
728 sofar += i;
729 len -= i;
730
731 assert( len >= 0 );
732
733 if ( sep < 5 ) {
734 goto done;
735 }
736 s[sofar++] = '?';
737 len--;
738
739 assert( len >= 0 );
740
741 i = hex_escape_list( &s[sofar], len, u->lud_exts, URLESC_COMMA );
742 sofar += i;
743 len -= i;
744
745 assert( len >= 0 );
746
747 done:
748 if ( len < 0 ) {
749 return -1;
750 }
751
752 return sofar;
753 }
754
755 char *
756 ldap_url_desc2str( LDAPURLDesc *u )
757 {
758 int len;
759 char *s;
760
761 if ( u == NULL ) {
762 return NULL;
763 }
764
765 len = desc2str_len( u );
766 if ( len < 0 ) {
767 return NULL;
768 }
769
770 /* allocate enough to hex escape everything -- overkill */
771 s = LDAP_MALLOC( len + 1 );
772
773 if ( s == NULL ) {
774 return NULL;
775 }
776
777 if ( desc2str( u, s, len ) != len ) {
778 LDAP_FREE( s );
779 return NULL;
780 }
781
782 s[len] = '\0';
783
784 return s;
785 }
786
787 int
788 ldap_url_parse_ext( LDAP_CONST char *url_in, LDAPURLDesc **ludpp, unsigned flags )
789 {
790 /*
791 * Pick apart the pieces of an LDAP URL.
792 */
793
794 LDAPURLDesc *ludp;
795 char *p, *q, *r;
796 int i, enclosed, proto, is_v6 = 0;
797 const char *scheme = NULL;
798 const char *url_tmp;
799 char *url;
800
801 int check_dn = 1;
802
803 if( url_in == NULL || ludpp == NULL ) {
804 return LDAP_URL_ERR_PARAM;
805 }
806
807 #ifndef LDAP_INT_IN_KERNEL
808 /* Global options may not be created yet
809 * We can't test if the global options are initialized
810 * because a call to LDAP_INT_GLOBAL_OPT() will try to allocate
811 * the options and cause infinite recursion
812 */
813 Debug( LDAP_DEBUG_TRACE, "ldap_url_parse_ext(%s)\n", url_in, 0, 0 );
814 #endif
815
816 *ludpp = NULL; /* pessimistic */
817
818 url_tmp = skip_url_prefix( url_in, &enclosed, &scheme );
819
820 if ( url_tmp == NULL ) {
821 return LDAP_URL_ERR_BADSCHEME;
822 }
823
824 assert( scheme != NULL );
825
826 proto = ldap_pvt_url_scheme2proto( scheme );
827 if ( proto == -1 ) {
828 return LDAP_URL_ERR_BADSCHEME;
829 }
830
831 /* make working copy of the remainder of the URL */
832 url = LDAP_STRDUP( url_tmp );
833 if ( url == NULL ) {
834 return LDAP_URL_ERR_MEM;
835 }
836
837 if ( enclosed ) {
838 p = &url[strlen(url)-1];
839
840 if( *p != '>' ) {
841 LDAP_FREE( url );
842 return LDAP_URL_ERR_BADENCLOSURE;
843 }
844
845 *p = '\0';
846 }
847
848 /* allocate return struct */
849 ludp = (LDAPURLDesc *)LDAP_CALLOC( 1, sizeof( LDAPURLDesc ));
850
851 if ( ludp == NULL ) {
852 LDAP_FREE( url );
853 return LDAP_URL_ERR_MEM;
854 }
855
856 ludp->lud_next = NULL;
857 ludp->lud_host = NULL;
858 ludp->lud_port = 0;
859 ludp->lud_dn = NULL;
860 ludp->lud_attrs = NULL;
861 ludp->lud_scope = ( flags & LDAP_PVT_URL_PARSE_NODEF_SCOPE ) ? LDAP_SCOPE_BASE : LDAP_SCOPE_DEFAULT;
862 ludp->lud_filter = NULL;
863 ludp->lud_exts = NULL;
864
865 ludp->lud_scheme = LDAP_STRDUP( scheme );
866
867 if ( ludp->lud_scheme == NULL ) {
868 LDAP_FREE( url );
869 ldap_free_urldesc( ludp );
870 return LDAP_URL_ERR_MEM;
871 }
872
873 /* scan forward for '/' that marks end of hostport and begin. of dn */
874 p = strchr( url, '/' );
875 q = NULL;
876
877 if( p != NULL ) {
878 /* terminate hostport; point to start of dn */
879 *p++ = '\0';
880 } else {
881 /* check for Novell kludge, see below */
882 p = strchr( url, '?' );
883 if ( p ) {
884 *p++ = '\0';
885 q = p;
886 p = NULL;
887 }
888 }
889
890 if ( proto != LDAP_PROTO_IPC ) {
891 /* IPv6 syntax with [ip address]:port */
892 if ( *url == '[' ) {
893 r = strchr( url, ']' );
894 if ( r == NULL ) {
895 LDAP_FREE( url );
896 ldap_free_urldesc( ludp );
897 return LDAP_URL_ERR_BADURL;
898 }
899 *r++ = '\0';
900 q = strchr( r, ':' );
901 if ( q && q != r ) {
902 LDAP_FREE( url );
903 ldap_free_urldesc( ludp );
904 return LDAP_URL_ERR_BADURL;
905 }
906 is_v6 = 1;
907 } else {
908 q = strchr( url, ':' );
909 }
910
911 if ( q != NULL ) {
912 char *next;
913
914 *q++ = '\0';
915 ldap_pvt_hex_unescape( q );
916
917 if( *q == '\0' ) {
918 LDAP_FREE( url );
919 ldap_free_urldesc( ludp );
920 return LDAP_URL_ERR_BADURL;
921 }
922
923 ludp->lud_port = strtol( q, &next, 10 );
924 if ( next == q || next[0] != '\0' ) {
925 LDAP_FREE( url );
926 ldap_free_urldesc( ludp );
927 return LDAP_URL_ERR_BADURL;
928 }
929 /* check for Novell kludge */
930 if ( !p ) {
931 if ( *next != '\0' ) {
932 q = &next[1];
933 } else {
934 q = NULL;
935 }
936 }
937 }
938
939 if ( ( flags & LDAP_PVT_URL_PARSE_DEF_PORT ) && ludp->lud_port == 0 ) {
940 if ( strcmp( ludp->lud_scheme, "ldaps" ) == 0 ) {
941 ludp->lud_port = LDAPS_PORT;
942 } else {
943 ludp->lud_port = LDAP_PORT;
944 }
945 }
946 }
947
948 ldap_pvt_hex_unescape( url );
949
950 /* If [ip address]:port syntax, url is [ip and we skip the [ */
951 ludp->lud_host = LDAP_STRDUP( url + is_v6 );
952
953 if( ludp->lud_host == NULL ) {
954 LDAP_FREE( url );
955 ldap_free_urldesc( ludp );
956 return LDAP_URL_ERR_MEM;
957 }
958
959 if ( ( flags & LDAP_PVT_URL_PARSE_NOEMPTY_HOST )
960 && ludp->lud_host != NULL
961 && *ludp->lud_host == '\0' )
962 {
963 LDAP_FREE( ludp->lud_host );
964 ludp->lud_host = NULL;
965 }
966
967 /*
968 * Kludge. ldap://111.222.333.444:389??cn=abc,o=company
969 *
970 * On early Novell releases, search references/referrals were returned
971 * in this format, i.e., the dn was kind of in the scope position,
972 * but the required slash is missing. The whole thing is illegal syntax,
973 * but we need to account for it. Fortunately it can't be confused with
974 * anything real.
975 */
976 if( (p == NULL) && (q != NULL) && (*q == '?') ) {
977 /* ? immediately followed by question */
978 q++;
979 if( *q != '\0' ) {
980 /* parse dn part */
981 ldap_pvt_hex_unescape( q );
982 ludp->lud_dn = LDAP_STRDUP( q );
983
984 } else if ( !( flags & LDAP_PVT_URL_PARSE_NOEMPTY_DN ) ) {
985 ludp->lud_dn = LDAP_STRDUP( "" );
986
987 } else {
988 check_dn = 0;
989 }
990
991 if ( check_dn && ludp->lud_dn == NULL ) {
992 LDAP_FREE( url );
993 ldap_free_urldesc( ludp );
994 return LDAP_URL_ERR_MEM;
995 }
996 }
997
998 if( p == NULL ) {
999 LDAP_FREE( url );
1000 *ludpp = ludp;
1001 return LDAP_URL_SUCCESS;
1002 }
1003
1004 /* scan forward for '?' that may marks end of dn */
1005 q = strchr( p, '?' );
1006
1007 if( q != NULL ) {
1008 /* terminate dn part */
1009 *q++ = '\0';
1010 }
1011
1012 if( *p != '\0' ) {
1013 /* parse dn part */
1014 ldap_pvt_hex_unescape( p );
1015 ludp->lud_dn = LDAP_STRDUP( p );
1016
1017 } else if ( !( flags & LDAP_PVT_URL_PARSE_NOEMPTY_DN ) ) {
1018 ludp->lud_dn = LDAP_STRDUP( "" );
1019
1020 } else {
1021 check_dn = 0;
1022 }
1023
1024 if( check_dn && ludp->lud_dn == NULL ) {
1025 LDAP_FREE( url );
1026 ldap_free_urldesc( ludp );
1027 return LDAP_URL_ERR_MEM;
1028 }
1029
1030 if( q == NULL ) {
1031 /* no more */
1032 LDAP_FREE( url );
1033 *ludpp = ludp;
1034 return LDAP_URL_SUCCESS;
1035 }
1036
1037 /* scan forward for '?' that may marks end of attributes */
1038 p = q;
1039 q = strchr( p, '?' );
1040
1041 if( q != NULL ) {
1042 /* terminate attributes part */
1043 *q++ = '\0';
1044 }
1045
1046 if( *p != '\0' ) {
1047 /* parse attributes */
1048 ldap_pvt_hex_unescape( p );
1049 ludp->lud_attrs = ldap_str2charray( p, "," );
1050
1051 if( ludp->lud_attrs == NULL ) {
1052 LDAP_FREE( url );
1053 ldap_free_urldesc( ludp );
1054 return LDAP_URL_ERR_BADATTRS;
1055 }
1056 }
1057
1058 if ( q == NULL ) {
1059 /* no more */
1060 LDAP_FREE( url );
1061 *ludpp = ludp;
1062 return LDAP_URL_SUCCESS;
1063 }
1064
1065 /* scan forward for '?' that may marks end of scope */
1066 p = q;
1067 q = strchr( p, '?' );
1068
1069 if( q != NULL ) {
1070 /* terminate the scope part */
1071 *q++ = '\0';
1072 }
1073
1074 if( *p != '\0' ) {
1075 /* parse the scope */
1076 ldap_pvt_hex_unescape( p );
1077 ludp->lud_scope = ldap_pvt_str2scope( p );
1078
1079 if( ludp->lud_scope == -1 ) {
1080 LDAP_FREE( url );
1081 ldap_free_urldesc( ludp );
1082 return LDAP_URL_ERR_BADSCOPE;
1083 }
1084 }
1085
1086 if ( q == NULL ) {
1087 /* no more */
1088 LDAP_FREE( url );
1089 *ludpp = ludp;
1090 return LDAP_URL_SUCCESS;
1091 }
1092
1093 /* scan forward for '?' that may marks end of filter */
1094 p = q;
1095 q = strchr( p, '?' );
1096
1097 if( q != NULL ) {
1098 /* terminate the filter part */
1099 *q++ = '\0';
1100 }
1101
1102 if( *p != '\0' ) {
1103 /* parse the filter */
1104 ldap_pvt_hex_unescape( p );
1105
1106 if( ! *p ) {
1107 /* missing filter */
1108 LDAP_FREE( url );
1109 ldap_free_urldesc( ludp );
1110 return LDAP_URL_ERR_BADFILTER;
1111 }
1112
1113 ludp->lud_filter = LDAP_STRDUP( p );
1114
1115 if( ludp->lud_filter == NULL ) {
1116 LDAP_FREE( url );
1117 ldap_free_urldesc( ludp );
1118 return LDAP_URL_ERR_MEM;
1119 }
1120 }
1121
1122 if ( q == NULL ) {
1123 /* no more */
1124 LDAP_FREE( url );
1125 *ludpp = ludp;
1126 return LDAP_URL_SUCCESS;
1127 }
1128
1129 /* scan forward for '?' that may marks end of extensions */
1130 p = q;
1131 q = strchr( p, '?' );
1132
1133 if( q != NULL ) {
1134 /* extra '?' */
1135 LDAP_FREE( url );
1136 ldap_free_urldesc( ludp );
1137 return LDAP_URL_ERR_BADURL;
1138 }
1139
1140 /* parse the extensions */
1141 ludp->lud_exts = ldap_str2charray( p, "," );
1142
1143 if( ludp->lud_exts == NULL ) {
1144 LDAP_FREE( url );
1145 ldap_free_urldesc( ludp );
1146 return LDAP_URL_ERR_BADEXTS;
1147 }
1148
1149 for( i=0; ludp->lud_exts[i] != NULL; i++ ) {
1150 ldap_pvt_hex_unescape( ludp->lud_exts[i] );
1151
1152 if( *ludp->lud_exts[i] == '!' ) {
1153 /* count the number of critical extensions */
1154 ludp->lud_crit_exts++;
1155 }
1156 }
1157
1158 if( i == 0 ) {
1159 /* must have 1 or more */
1160 LDAP_FREE( url );
1161 ldap_free_urldesc( ludp );
1162 return LDAP_URL_ERR_BADEXTS;
1163 }
1164
1165 /* no more */
1166 *ludpp = ludp;
1167 LDAP_FREE( url );
1168 return LDAP_URL_SUCCESS;
1169 }
1170
1171 int
1172 ldap_url_parse( LDAP_CONST char *url_in, LDAPURLDesc **ludpp )
1173 {
1174 return ldap_url_parse_ext( url_in, ludpp, LDAP_PVT_URL_PARSE_HISTORIC );
1175 }
1176
1177 LDAPURLDesc *
1178 ldap_url_dup ( LDAPURLDesc *ludp )
1179 {
1180 LDAPURLDesc *dest;
1181
1182 if ( ludp == NULL ) {
1183 return NULL;
1184 }
1185
1186 dest = LDAP_MALLOC( sizeof(LDAPURLDesc) );
1187 if (dest == NULL)
1188 return NULL;
1189
1190 *dest = *ludp;
1191 dest->lud_scheme = NULL;
1192 dest->lud_host = NULL;
1193 dest->lud_dn = NULL;
1194 dest->lud_filter = NULL;
1195 dest->lud_attrs = NULL;
1196 dest->lud_exts = NULL;
1197 dest->lud_next = NULL;
1198
1199 if ( ludp->lud_scheme != NULL ) {
1200 dest->lud_scheme = LDAP_STRDUP( ludp->lud_scheme );
1201 if (dest->lud_scheme == NULL) {
1202 ldap_free_urldesc(dest);
1203 return NULL;
1204 }
1205 }
1206
1207 if ( ludp->lud_host != NULL ) {
1208 dest->lud_host = LDAP_STRDUP( ludp->lud_host );
1209 if (dest->lud_host == NULL) {
1210 ldap_free_urldesc(dest);
1211 return NULL;
1212 }
1213 }
1214
1215 if ( ludp->lud_dn != NULL ) {
1216 dest->lud_dn = LDAP_STRDUP( ludp->lud_dn );
1217 if (dest->lud_dn == NULL) {
1218 ldap_free_urldesc(dest);
1219 return NULL;
1220 }
1221 }
1222
1223 if ( ludp->lud_filter != NULL ) {
1224 dest->lud_filter = LDAP_STRDUP( ludp->lud_filter );
1225 if (dest->lud_filter == NULL) {
1226 ldap_free_urldesc(dest);
1227 return NULL;
1228 }
1229 }
1230
1231 if ( ludp->lud_attrs != NULL ) {
1232 dest->lud_attrs = ldap_charray_dup( ludp->lud_attrs );
1233 if (dest->lud_attrs == NULL) {
1234 ldap_free_urldesc(dest);
1235 return NULL;
1236 }
1237 }
1238
1239 if ( ludp->lud_exts != NULL ) {
1240 dest->lud_exts = ldap_charray_dup( ludp->lud_exts );
1241 if (dest->lud_exts == NULL) {
1242 ldap_free_urldesc(dest);
1243 return NULL;
1244 }
1245 }
1246
1247 return dest;
1248 }
1249
1250 LDAPURLDesc *
1251 ldap_url_duplist (LDAPURLDesc *ludlist)
1252 {
1253 LDAPURLDesc *dest, *tail, *ludp, *newludp;
1254
1255 dest = NULL;
1256 tail = NULL;
1257 for (ludp = ludlist; ludp != NULL; ludp = ludp->lud_next) {
1258 newludp = ldap_url_dup(ludp);
1259 if (newludp == NULL) {
1260 ldap_free_urllist(dest);
1261 return NULL;
1262 }
1263 if (tail == NULL)
1264 dest = newludp;
1265 else
1266 tail->lud_next = newludp;
1267 tail = newludp;
1268 }
1269 return dest;
1270 }
1271
1272 static int
1273 ldap_url_parselist_int (LDAPURLDesc **ludlist, const char *url, const char *sep, unsigned flags )
1274
1275 {
1276 int i, rc;
1277 LDAPURLDesc *ludp;
1278 char **urls;
1279
1280 assert( ludlist != NULL );
1281 assert( url != NULL );
1282
1283 *ludlist = NULL;
1284
1285 if ( sep == NULL ) {
1286 sep = ", ";
1287 }
1288
1289 urls = ldap_str2charray( url, sep );
1290 if (urls == NULL)
1291 return LDAP_URL_ERR_MEM;
1292
1293 /* count the URLs... */
1294 for (i = 0; urls[i] != NULL; i++) ;
1295 /* ...and put them in the "stack" backward */
1296 while (--i >= 0) {
1297 rc = ldap_url_parse_ext( urls[i], &ludp, flags );
1298 if ( rc != 0 ) {
1299 ldap_charray_free( urls );
1300 ldap_free_urllist( *ludlist );
1301 *ludlist = NULL;
1302 return rc;
1303 }
1304 ludp->lud_next = *ludlist;
1305 *ludlist = ludp;
1306 }
1307 ldap_charray_free( urls );
1308 return LDAP_URL_SUCCESS;
1309 }
1310
1311 int
1312 ldap_url_parselist (LDAPURLDesc **ludlist, const char *url )
1313 {
1314 return ldap_url_parselist_int( ludlist, url, ", ", LDAP_PVT_URL_PARSE_HISTORIC );
1315 }
1316
1317 int
1318 ldap_url_parselist_ext (LDAPURLDesc **ludlist, const char *url, const char *sep, unsigned flags )
1319 {
1320 return ldap_url_parselist_int( ludlist, url, sep, flags );
1321 }
1322
1323 int
1324 ldap_url_parsehosts(
1325 LDAPURLDesc **ludlist,
1326 const char *hosts,
1327 int port )
1328 {
1329 int i;
1330 LDAPURLDesc *ludp;
1331 char **specs, *p;
1332
1333 assert( ludlist != NULL );
1334 assert( hosts != NULL );
1335
1336 *ludlist = NULL;
1337
1338 specs = ldap_str2charray(hosts, ", ");
1339 if (specs == NULL)
1340 return LDAP_NO_MEMORY;
1341
1342 /* count the URLs... */
1343 for (i = 0; specs[i] != NULL; i++) /* EMPTY */;
1344
1345 /* ...and put them in the "stack" backward */
1346 while (--i >= 0) {
1347 ludp = LDAP_CALLOC( 1, sizeof(LDAPURLDesc) );
1348 if (ludp == NULL) {
1349 ldap_charray_free(specs);
1350 ldap_free_urllist(*ludlist);
1351 *ludlist = NULL;
1352 return LDAP_NO_MEMORY;
1353 }
1354 ludp->lud_port = port;
1355 ludp->lud_host = specs[i];
1356 specs[i] = NULL;
1357 p = strchr(ludp->lud_host, ':');
1358 if (p != NULL) {
1359 /* more than one :, IPv6 address */
1360 if ( strchr(p+1, ':') != NULL ) {
1361 /* allow [address] and [address]:port */
1362 if ( *ludp->lud_host == '[' ) {
1363 p = LDAP_STRDUP(ludp->lud_host+1);
1364 /* copied, make sure we free source later */
1365 specs[i] = ludp->lud_host;
1366 ludp->lud_host = p;
1367 p = strchr( ludp->lud_host, ']' );
1368 if ( p == NULL ) {
1369 LDAP_FREE(ludp);
1370 ldap_charray_free(specs);
1371 return LDAP_PARAM_ERROR;
1372 }
1373 *p++ = '\0';
1374 if ( *p != ':' ) {
1375 if ( *p != '\0' ) {
1376 LDAP_FREE(ludp);
1377 ldap_charray_free(specs);
1378 return LDAP_PARAM_ERROR;
1379 }
1380 p = NULL;
1381 }
1382 } else {
1383 p = NULL;
1384 }
1385 }
1386 if (p != NULL) {
1387 char *next;
1388
1389 *p++ = 0;
1390 ldap_pvt_hex_unescape(p);
1391 ludp->lud_port = strtol( p, &next, 10 );
1392 if ( next == p || next[0] != '\0' ) {
1393 LDAP_FREE(ludp);
1394 ldap_charray_free(specs);
1395 return LDAP_PARAM_ERROR;
1396 }
1397 }
1398 }
1399 ldap_pvt_hex_unescape(ludp->lud_host);
1400 ludp->lud_scheme = LDAP_STRDUP("ldap");
1401 ludp->lud_next = *ludlist;
1402 *ludlist = ludp;
1403 }
1404
1405 /* this should be an array of NULLs now */
1406 /* except entries starting with [ */
1407 ldap_charray_free(specs);
1408 return LDAP_SUCCESS;
1409 }
1410
1411 char *
1412 ldap_url_list2hosts (LDAPURLDesc *ludlist)
1413 {
1414 LDAPURLDesc *ludp;
1415 int size;
1416 char *s, *p, buf[32]; /* big enough to hold a long decimal # (overkill) */
1417
1418 if (ludlist == NULL)
1419 return NULL;
1420
1421 /* figure out how big the string is */
1422 size = 1; /* nul-term */
1423 for (ludp = ludlist; ludp != NULL; ludp = ludp->lud_next) {
1424 size += strlen(ludp->lud_host) + 1; /* host and space */
1425 if (strchr(ludp->lud_host, ':')) /* will add [ ] below */
1426 size += 2;
1427 if (ludp->lud_port != 0)
1428 size += sprintf(buf, ":%d", ludp->lud_port);
1429 }
1430 s = LDAP_MALLOC(size);
1431 if (s == NULL)
1432 return NULL;
1433
1434 p = s;
1435 for (ludp = ludlist; ludp != NULL; ludp = ludp->lud_next) {
1436 if (strchr(ludp->lud_host, ':')) {
1437 p += sprintf(p, "[%s]", ludp->lud_host);
1438 } else {
1439 strcpy(p, ludp->lud_host);
1440 p += strlen(ludp->lud_host);
1441 }
1442 if (ludp->lud_port != 0)
1443 p += sprintf(p, ":%d", ludp->lud_port);
1444 *p++ = ' ';
1445 }
1446 if (p != s)
1447 p--; /* nuke that extra space */
1448 *p = 0;
1449 return s;
1450 }
1451
1452 char *
1453 ldap_url_list2urls(
1454 LDAPURLDesc *ludlist )
1455 {
1456 LDAPURLDesc *ludp;
1457 int size, sofar;
1458 char *s;
1459
1460 if ( ludlist == NULL ) {
1461 return NULL;
1462 }
1463
1464 /* figure out how big the string is */
1465 for ( size = 0, ludp = ludlist; ludp != NULL; ludp = ludp->lud_next ) {
1466 int len = desc2str_len( ludp );
1467 if ( len < 0 ) {
1468 return NULL;
1469 }
1470 size += len + 1;
1471 }
1472
1473 s = LDAP_MALLOC( size );
1474
1475 if ( s == NULL ) {
1476 return NULL;
1477 }
1478
1479 for ( sofar = 0, ludp = ludlist; ludp != NULL; ludp = ludp->lud_next ) {
1480 int len;
1481
1482 len = desc2str( ludp, &s[sofar], size );
1483
1484 if ( len < 0 ) {
1485 LDAP_FREE( s );
1486 return NULL;
1487 }
1488
1489 sofar += len;
1490 size -= len;
1491
1492 s[sofar++] = ' ';
1493 size--;
1494
1495 assert( size >= 0 );
1496 }
1497
1498 s[sofar - 1] = '\0';
1499
1500 return s;
1501 }
1502
1503 void
1504 ldap_free_urllist( LDAPURLDesc *ludlist )
1505 {
1506 LDAPURLDesc *ludp, *next;
1507
1508 for (ludp = ludlist; ludp != NULL; ludp = next) {
1509 next = ludp->lud_next;
1510 ldap_free_urldesc(ludp);
1511 }
1512 }
1513
1514 void
1515 ldap_free_urldesc( LDAPURLDesc *ludp )
1516 {
1517 if ( ludp == NULL ) {
1518 return;
1519 }
1520
1521 if ( ludp->lud_scheme != NULL ) {
1522 LDAP_FREE( ludp->lud_scheme );
1523 }
1524
1525 if ( ludp->lud_host != NULL ) {
1526 LDAP_FREE( ludp->lud_host );
1527 }
1528
1529 if ( ludp->lud_dn != NULL ) {
1530 LDAP_FREE( ludp->lud_dn );
1531 }
1532
1533 if ( ludp->lud_filter != NULL ) {
1534 LDAP_FREE( ludp->lud_filter);
1535 }
1536
1537 if ( ludp->lud_attrs != NULL ) {
1538 LDAP_VFREE( ludp->lud_attrs );
1539 }
1540
1541 if ( ludp->lud_exts != NULL ) {
1542 LDAP_VFREE( ludp->lud_exts );
1543 }
1544
1545 LDAP_FREE( ludp );
1546 }
1547
1548 static int
1549 ldap_int_is_hexpair( char *s )
1550 {
1551 int i;
1552
1553 for ( i = 0; i < 2; i++ ) {
1554 if ( s[i] >= '0' && s[i] <= '9' ) {
1555 continue;
1556 }
1557
1558 if ( s[i] >= 'A' && s[i] <= 'F' ) {
1559 continue;
1560 }
1561
1562 if ( s[i] >= 'a' && s[i] <= 'f' ) {
1563 continue;
1564 }
1565
1566 return 0;
1567 }
1568
1569 return 1;
1570 }
1571
1572 static int
1573 ldap_int_unhex( int c )
1574 {
1575 return( c >= '0' && c <= '9' ? c - '0'
1576 : c >= 'A' && c <= 'F' ? c - 'A' + 10
1577 : c - 'a' + 10 );
1578 }
1579
1580 void
1581 ldap_pvt_hex_unescape( char *s )
1582 {
1583 /*
1584 * Remove URL hex escapes from s... done in place. The basic concept for
1585 * this routine is borrowed from the WWW library HTUnEscape() routine.
1586 */
1587 char *p,
1588 *save_s = s;
1589
1590 for ( p = s; *s != '\0'; ++s ) {
1591 if ( *s == '%' ) {
1592 /*
1593 * FIXME: what if '%' is followed
1594 * by non-hexpair chars?
1595 */
1596 if ( !ldap_int_is_hexpair( s + 1 ) ) {
1597 p = save_s;
1598 break;
1599 }
1600
1601 if ( *++s == '\0' ) {
1602 break;
1603 }
1604 *p = ldap_int_unhex( *s ) << 4;
1605 if ( *++s == '\0' ) {
1606 break;
1607 }
1608 *p++ += ldap_int_unhex( *s );
1609 } else {
1610 *p++ = *s;
1611 }
1612 }
1613
1614 *p = '\0';
1615 }
1616
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