-
Notifications
You must be signed in to change notification settings - Fork 1
/
Copy pathurlmatch.c
1547 lines (1365 loc) · 41.5 KB
/
urlmatch.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*********************************************************************
*
* File : $Source: /cvsroot/ijbswa/current/urlmatch.c,v $
*
* Purpose : Declares functions to match URLs against URL
* patterns.
*
* Copyright : Written by and Copyright (C) 2001-2020
* the Privoxy team. https://www.privoxy.org/
*
* Based on the Internet Junkbuster originally written
* by and Copyright (C) 1997 Anonymous Coders and
* Junkbusters Corporation. http://www.junkbusters.com
*
* This program is free software; you can redistribute it
* and/or modify it under the terms of the GNU General
* Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will
* be useful, but WITHOUT ANY WARRANTY; without even the
* implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU General Public
* License for more details.
*
* The GNU General Public License should be included with
* this file. If not, you can view it at
* http://www.gnu.org/copyleft/gpl.html
* or write to the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*********************************************************************/
#include "config.h"
#ifndef _WIN32
#include <stdio.h>
#include <sys/types.h>
#endif
#include <stdlib.h>
#include <ctype.h>
#include <assert.h>
#include <string.h>
#if !defined(_WIN32)
#include <unistd.h>
#endif
#include "project.h"
#include "urlmatch.h"
#include "ssplit.h"
#include "miscutil.h"
#include "errlog.h"
enum regex_anchoring
{
NO_ANCHORING,
LEFT_ANCHORED,
RIGHT_ANCHORED,
RIGHT_ANCHORED_HOST
};
static jb_err compile_vanilla_host_pattern(struct pattern_spec *url, const char *host_pattern);
#ifdef FEATURE_PCRE_HOST_PATTERNS
static jb_err compile_pcre_host_pattern(struct pattern_spec *url, const char *host_pattern);
#endif
/*********************************************************************
*
* Function : free_http_request
*
* Description : Freez a http_request structure
*
* Parameters :
* 1 : http = points to a http_request structure to free
*
* Returns : N/A
*
*********************************************************************/
void free_http_request(struct http_request *http)
{
assert(http);
freez(http->cmd);
freez(http->ocmd);
freez(http->gpc);
freez(http->host);
freez(http->url);
freez(http->hostport);
freez(http->path);
freez(http->version);
freez(http->host_ip_addr_str);
freez(http->dbuffer);
freez(http->dvec);
http->dcount = 0;
}
/*********************************************************************
*
* Function : init_domain_components
*
* Description : Splits the domain name so we can compare it
* against wildcards. It used to be part of
* parse_http_url, but was separated because the
* same code is required in chat() in case of
* intercepted requests.
*
* Parameters :
* 1 : http = pointer to the http structure to hold elements.
*
* Returns : JB_ERR_OK on success
* JB_ERR_PARSE on malformed command/URL
* or >100 domains deep.
*
*********************************************************************/
jb_err init_domain_components(struct http_request *http)
{
char *vec[BUFFER_SIZE];
size_t size;
char *p;
http->dbuffer = strdup_or_die(http->host);
/* map to lower case */
for (p = http->dbuffer; *p ; p++)
{
*p = (char)privoxy_tolower(*p);
}
/* split the domain name into components */
http->dcount = ssplit(http->dbuffer, ".", vec, SZ(vec));
if (http->dcount <= 0)
{
/*
* Error: More than SZ(vec) components in domain
* or: no components in domain
*/
log_error(LOG_LEVEL_ERROR, "More than SZ(vec) components in domain or none at all.");
return JB_ERR_PARSE;
}
/* save a copy of the pointers in dvec */
size = (size_t)http->dcount * sizeof(*http->dvec);
http->dvec = malloc_or_die(size);
memcpy(http->dvec, vec, size);
return JB_ERR_OK;
}
/*********************************************************************
*
* Function : url_requires_percent_encoding
*
* Description : Checks if an URL contains invalid characters
* according to RFC 3986 that should be percent-encoded.
* Does not verify whether or not the passed string
* actually is a valid URL.
*
* Parameters :
* 1 : url = URL to check
*
* Returns : True in case of valid URLs, false otherwise
*
*********************************************************************/
int url_requires_percent_encoding(const char *url)
{
static const char allowed_characters[128] = {
'\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
'\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
'\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
'\0', '\0', '\0', '!', '\0', '#', '$', '%', '&', '\'',
'(', ')', '*', '+', ',', '-', '.', '/', '0', '1',
'2', '3', '4', '5', '6', '7', '8', '9', ':', ';',
'\0', '=', '\0', '?', '@', 'A', 'B', 'C', 'D', 'E',
'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y',
'Z', '[', '\0', ']', '\0', '_', '\0', 'a', 'b', 'c',
'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '\0', '\0', '\0', '~', '\0'
};
while (*url != '\0')
{
const unsigned int i = (unsigned char)*url++;
if (i >= sizeof(allowed_characters) || '\0' == allowed_characters[i])
{
return TRUE;
}
}
return FALSE;
}
/*********************************************************************
*
* Function : parse_http_url
*
* Description : Parse out the host and port from the URL. Find the
* hostname & path, port (if ':'), and/or password (if '@')
*
* Parameters :
* 1 : url = URL (or is it URI?) to break down
* 2 : http = pointer to the http structure to hold elements.
* Must be initialized with valid values (like NULLs).
* 3 : require_protocol = Whether or not URLs without
* protocol are acceptable.
*
* Returns : JB_ERR_OK on success
* JB_ERR_PARSE on malformed command/URL
* or >100 domains deep.
*
*********************************************************************/
jb_err parse_http_url(const char *url, struct http_request *http, int require_protocol)
{
int host_available = 1; /* A proxy can dream. */
/*
* Save our initial URL
*/
http->url = strdup_or_die(url);
/*
* Check for * URI. If found, we're done.
*/
if (*http->url == '*')
{
http->path = strdup_or_die("*");
http->hostport = strdup_or_die("");
if (http->url[1] != '\0')
{
return JB_ERR_PARSE;
}
return JB_ERR_OK;
}
/*
* Split URL into protocol, hostport, path.
*/
{
char *buf;
char *url_noproto;
char *url_path;
buf = strdup_or_die(url);
/* Find the start of the URL in our scratch space */
url_noproto = buf;
if (strncmpic(url_noproto, "http://", 7) == 0)
{
url_noproto += 7;
}
else if (strncmpic(url_noproto, "https://", 8) == 0)
{
/*
* Should only happen when called from cgi_show_url_info()
* or when the request was https-inspected and the request
* line got rewritten.
*/
url_noproto += 8;
http->ssl = 1;
}
else if (*url_noproto == '/')
{
/*
* Short request line without protocol and host.
* Most likely because the client's request
* was intercepted and redirected into Privoxy.
*/
http->host = NULL;
host_available = 0;
}
else if (require_protocol)
{
freez(buf);
return JB_ERR_PARSE;
}
url_path = strchr(url_noproto, '/');
if (url_path != NULL)
{
/*
* Got a path.
*
* If FEATURE_HTTPS_INSPECTION isn't available, ignore the
* path for https URLs so that we get consistent behaviour
* if a https URL is parsed. When the URL is actually
* retrieved, https hides the path part.
*/
http->path = strdup_or_die(
#ifndef FEATURE_HTTPS_INSPECTION
http->ssl ? "/" :
#endif
url_path
);
*url_path = '\0';
http->hostport = string_tolower(url_noproto);
}
else
{
/*
* Repair broken HTTP requests that don't contain a path,
* or CONNECT requests
*/
http->path = strdup_or_die("/");
http->hostport = string_tolower(url_noproto);
}
freez(buf);
if (http->hostport == NULL)
{
return JB_ERR_PARSE;
}
}
if (!host_available)
{
/* Without host, there is nothing left to do here */
return JB_ERR_OK;
}
/*
* Split hostport into user/password (ignored), host, port.
*/
{
char *buf;
char *host;
char *port;
buf = strdup_or_die(http->hostport);
/* check if url contains username and/or password */
host = strchr(buf, '@');
if (host != NULL)
{
/* Contains username/password, skip it and the @ sign. */
host++;
}
else
{
/* No username or password. */
host = buf;
}
/* Move after hostname before port number */
if (*host == '[')
{
/* Numeric IPv6 address delimited by brackets */
host++;
port = strchr(host, ']');
if (port == NULL)
{
/* Missing closing bracket */
freez(buf);
return JB_ERR_PARSE;
}
*port++ = '\0';
if (*port == '\0')
{
port = NULL;
}
else if (*port != ':')
{
/* Garbage after closing bracket */
freez(buf);
return JB_ERR_PARSE;
}
}
else
{
/* Plain non-escaped hostname */
port = strchr(host, ':');
}
/* check if url contains port */
if (port != NULL)
{
/* Contains port */
char *endptr;
long parsed_port;
/* Terminate hostname and point to start of port string */
*port++ = '\0';
parsed_port = strtol(port, &endptr, 10);
if ((parsed_port <= 0) || (parsed_port > 65535) || (*endptr != '\0'))
{
log_error(LOG_LEVEL_ERROR, "Invalid port in URL: %s.", url);
freez(buf);
return JB_ERR_PARSE;
}
http->port = (int)parsed_port;
}
else
{
/* No port specified. */
http->port = (http->ssl ? 443 : 80);
}
http->host = strdup_or_die(host);
freez(buf);
}
/* Split domain name so we can compare it against wildcards */
return init_domain_components(http);
}
/*********************************************************************
*
* Function : unknown_method
*
* Description : Checks whether a method is unknown.
*
* Parameters :
* 1 : method = points to a http method
*
* Returns : TRUE if it's unknown, FALSE otherwise.
*
*********************************************************************/
static int unknown_method(const char *method)
{
static const char * const known_http_methods[] = {
/* Basic HTTP request type */
"GET", "HEAD", "POST", "PUT", "DELETE", "OPTIONS", "TRACE", "CONNECT",
/* webDAV extensions (RFC2518) */
"PROPFIND", "PROPPATCH", "MOVE", "COPY", "MKCOL", "LOCK", "UNLOCK",
/*
* Microsoft webDAV extension for Exchange 2000. See:
* http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JanMar/0001.html
* http://msdn.microsoft.com/library/en-us/wss/wss/_webdav_methods.asp
*/
"BCOPY", "BMOVE", "BDELETE", "BPROPFIND", "BPROPPATCH",
/*
* Another Microsoft webDAV extension for Exchange 2000. See:
* http://systems.cs.colorado.edu/grunwald/MobileComputing/Papers/draft-cohen-gena-p-base-00.txt
* http://lists.w3.org/Archives/Public/w3c-dist-auth/2002JanMar/0001.html
* http://msdn.microsoft.com/library/en-us/wss/wss/_webdav_methods.asp
*/
"SUBSCRIBE", "UNSUBSCRIBE", "NOTIFY", "POLL",
/*
* Yet another WebDAV extension, this time for
* Web Distributed Authoring and Versioning (RFC3253)
*/
"VERSION-CONTROL", "REPORT", "CHECKOUT", "CHECKIN", "UNCHECKOUT",
"MKWORKSPACE", "UPDATE", "LABEL", "MERGE", "BASELINE-CONTROL", "MKACTIVITY",
/*
* The PATCH method is defined by RFC5789, the format of the
* actual patch in the body depends on the application, but from
* Privoxy's point of view it doesn't matter.
*/
"PATCH",
};
int i;
for (i = 0; i < SZ(known_http_methods); i++)
{
if (0 == strcmpic(method, known_http_methods[i]))
{
return FALSE;
}
}
return TRUE;
}
/*********************************************************************
*
* Function : normalize_http_version
*
* Description : Take a supported HTTP version string and remove
* leading zeroes etc., reject unsupported versions.
*
* This is an explicit RFC 2616 (3.1) MUST and
* RFC 7230 mandates that intermediaries send their
* own HTTP-version in forwarded messages.
*
* Parameters :
* 1 : http_version = HTTP version string
*
* Returns : JB_ERR_OK on success
* JB_ERR_PARSE if the HTTP version is unsupported
*
*********************************************************************/
static jb_err normalize_http_version(char *http_version)
{
unsigned int major_version;
unsigned int minor_version;
if (2 != sscanf(http_version, "HTTP/%u.%u", &major_version, &minor_version))
{
log_error(LOG_LEVEL_ERROR, "Unsupported HTTP version: %s", http_version);
return JB_ERR_PARSE;
}
if (major_version != 1 || (minor_version != 0 && minor_version != 1))
{
log_error(LOG_LEVEL_ERROR, "The only supported HTTP "
"versions are 1.0 and 1.1. This rules out: %s", http_version);
return JB_ERR_PARSE;
}
assert(strlen(http_version) >= 8);
snprintf(http_version, 9, "HTTP/%u.%u", major_version, minor_version);
return JB_ERR_OK;
}
/*********************************************************************
*
* Function : parse_http_request
*
* Description : Parse out the host and port from the URL. Find the
* hostname & path, port (if ':'), and/or password (if '@')
*
* Parameters :
* 1 : req = HTTP request line to break down
* 2 : http = pointer to the http structure to hold elements
*
* Returns : JB_ERR_OK on success
* JB_ERR_CGI_PARAMS on malformed command/URL
* or >100 domains deep.
*
*********************************************************************/
jb_err parse_http_request(const char *req, struct http_request *http)
{
char *buf;
char *v[3];
int n;
jb_err err;
memset(http, '\0', sizeof(*http));
buf = strdup_or_die(req);
n = ssplit(buf, " \r\n", v, SZ(v));
if (n != 3)
{
freez(buf);
return JB_ERR_PARSE;
}
/*
* Fail in case of unknown methods
* which we might not handle correctly.
*
* XXX: There should be a config option
* to forward requests with unknown methods
* anyway. Most of them don't need special
* steps.
*/
if (unknown_method(v[0]))
{
log_error(LOG_LEVEL_ERROR, "Unknown HTTP method detected: %s", v[0]);
freez(buf);
return JB_ERR_PARSE;
}
if (JB_ERR_OK != normalize_http_version(v[2]))
{
freez(buf);
return JB_ERR_PARSE;
}
http->ssl = !strcmpic(v[0], "CONNECT");
err = parse_http_url(v[1], http, !http->ssl);
if (err)
{
freez(buf);
return err;
}
/*
* Copy the details into the structure
*/
http->cmd = strdup_or_die(req);
http->gpc = strdup_or_die(v[0]);
http->version = strdup_or_die(v[2]);
http->ocmd = strdup_or_die(http->cmd);
freez(buf);
return JB_ERR_OK;
}
/*********************************************************************
*
* Function : compile_pattern
*
* Description : Compiles a host, domain or TAG pattern.
*
* Parameters :
* 1 : pattern = The pattern to compile.
* 2 : anchoring = How the regex should be modified
* before compilation. Can be either
* one of NO_ANCHORING, LEFT_ANCHORED,
* RIGHT_ANCHORED or RIGHT_ANCHORED_HOST.
* 3 : url = In case of failures, the spec member is
* logged and the structure freed.
* 4 : regex = Where the compiled regex should be stored.
*
* Returns : JB_ERR_OK - Success
* JB_ERR_PARSE - Cannot parse regex
*
*********************************************************************/
static jb_err compile_pattern(const char *pattern, enum regex_anchoring anchoring,
struct pattern_spec *url, regex_t **regex)
{
int errcode;
const char *fmt = NULL;
char *rebuf;
size_t rebuf_size;
assert(pattern);
if (pattern[0] == '\0')
{
*regex = NULL;
return JB_ERR_OK;
}
switch (anchoring)
{
case NO_ANCHORING:
fmt = "%s";
break;
case RIGHT_ANCHORED:
fmt = "%s$";
break;
case RIGHT_ANCHORED_HOST:
fmt = "%s\\.?$";
break;
case LEFT_ANCHORED:
fmt = "^%s";
break;
default:
log_error(LOG_LEVEL_FATAL,
"Invalid anchoring in compile_pattern %d", anchoring);
}
rebuf_size = strlen(pattern) + strlen(fmt);
rebuf = malloc_or_die(rebuf_size);
*regex = zalloc_or_die(sizeof(**regex));
snprintf(rebuf, rebuf_size, fmt, pattern);
errcode = regcomp(*regex, rebuf, (REG_EXTENDED|REG_NOSUB|REG_ICASE));
if (errcode)
{
size_t errlen = regerror(errcode, *regex, rebuf, rebuf_size);
if (errlen > (rebuf_size - (size_t)1))
{
errlen = rebuf_size - (size_t)1;
}
rebuf[errlen] = '\0';
log_error(LOG_LEVEL_ERROR, "error compiling %s from %s: %s",
pattern, url->spec, rebuf);
free_pattern_spec(url);
freez(rebuf);
return JB_ERR_PARSE;
}
freez(rebuf);
return JB_ERR_OK;
}
/*********************************************************************
*
* Function : compile_url_pattern
*
* Description : Compiles the three parts of an URL pattern.
*
* Parameters :
* 1 : url = Target pattern_spec to be filled in.
* 2 : buf = The url pattern to compile. Will be messed up.
*
* Returns : JB_ERR_OK - Success
* JB_ERR_MEMORY - Out of memory
* JB_ERR_PARSE - Cannot parse regex
*
*********************************************************************/
static jb_err compile_url_pattern(struct pattern_spec *url, char *buf)
{
char *p;
const size_t prefix_length = 18;
#ifdef FEATURE_PCRE_HOST_PATTERNS
if (strncmpic(buf, "PCRE-HOST-PATTERN:", prefix_length) == 0)
{
url->pattern.url_spec.host_regex_type = PCRE_HOST_PATTERN;
/* Overwrite the "PCRE-HOST-PATTERN:" prefix */
memmove(buf, buf+prefix_length, strlen(buf+prefix_length)+1);
}
else
{
url->pattern.url_spec.host_regex_type = VANILLA_HOST_PATTERN;
}
#else
if (strncmpic(buf, "PCRE-HOST-PATTERN:", prefix_length) == 0)
{
log_error(LOG_LEVEL_ERROR,
"PCRE-HOST-PATTERN detected while Privoxy has been compiled "
"without FEATURE_PCRE_HOST_PATTERNS: %s",
buf);
/* Overwrite the "PCRE-HOST-PATTERN:" prefix */
memmove(buf, buf+prefix_length, strlen(buf+prefix_length)+1);
/*
* The pattern will probably not work as expected.
* We don't simply return JB_ERR_PARSE here so the
* regression tests can be loaded with and without
* FEATURE_PCRE_HOST_PATTERNS.
*/
}
#endif
p = strchr(buf, '/');
if (NULL != p)
{
/*
* Only compile the regex if it consists of more than
* a single slash, otherwise it wouldn't affect the result.
*/
if (p[1] != '\0')
{
/*
* XXX: does it make sense to compile the slash at the beginning?
*/
jb_err err = compile_pattern(p, LEFT_ANCHORED, url, &url->pattern.url_spec.preg);
if (JB_ERR_OK != err)
{
return err;
}
}
*p = '\0';
}
/*
* IPv6 numeric hostnames can contain colons, thus we need
* to delimit the hostname before the real port separator.
* As brackets are already used in the hostname pattern,
* we use angle brackets ('<', '>') instead.
*/
if ((buf[0] == '<') && (NULL != (p = strchr(buf + 1, '>'))))
{
*p++ = '\0';
buf++;
if (*p == '\0')
{
/* IPv6 address without port number */
p = NULL;
}
else if (*p != ':')
{
/* Garbage after address delimiter */
return JB_ERR_PARSE;
}
}
else
{
p = strchr(buf, ':');
}
if (NULL != p)
{
*p++ = '\0';
url->pattern.url_spec.port_list = strdup_or_die(p);
}
else
{
url->pattern.url_spec.port_list = NULL;
}
if (buf[0] != '\0')
{
#ifdef FEATURE_PCRE_HOST_PATTERNS
if (url->pattern.url_spec.host_regex_type == PCRE_HOST_PATTERN)
{
return compile_pcre_host_pattern(url, buf);
}
else
#endif
{
return compile_vanilla_host_pattern(url, buf);
}
}
return JB_ERR_OK;
}
#ifdef FEATURE_PCRE_HOST_PATTERNS
/*********************************************************************
*
* Function : compile_pcre_host_pattern
*
* Description : Parses and compiles a pcre host pattern.
*
* Parameters :
* 1 : url = Target pattern_spec to be filled in.
* 2 : host_pattern = Host pattern to compile.
*
* Returns : JB_ERR_OK - Success
* JB_ERR_MEMORY - Out of memory
* JB_ERR_PARSE - Cannot parse regex
*
*********************************************************************/
static jb_err compile_pcre_host_pattern(struct pattern_spec *url, const char *host_pattern)
{
return compile_pattern(host_pattern, RIGHT_ANCHORED_HOST, url, &url->pattern.url_spec.host_regex);
}
#endif /* def FEATURE_PCRE_HOST_PATTERNS */
/*********************************************************************
*
* Function : compile_vanilla_host_pattern
*
* Description : Parses and "compiles" an old-school host pattern.
*
* Parameters :
* 1 : url = Target pattern_spec to be filled in.
* 2 : host_pattern = Host pattern to parse.
*
* Returns : JB_ERR_OK - Success
* JB_ERR_PARSE - Cannot parse regex
*
*********************************************************************/
static jb_err compile_vanilla_host_pattern(struct pattern_spec *url, const char *host_pattern)
{
char *v[150];
size_t size;
char *p;
/*
* Parse domain part
*/
if (host_pattern[strlen(host_pattern) - 1] == '.')
{
url->pattern.url_spec.unanchored |= ANCHOR_RIGHT;
}
if (host_pattern[0] == '.')
{
url->pattern.url_spec.unanchored |= ANCHOR_LEFT;
}
/*
* Split domain into components
*/
url->pattern.url_spec.dbuffer = strdup_or_die(host_pattern);
/*
* Map to lower case
*/
for (p = url->pattern.url_spec.dbuffer; *p ; p++)
{
*p = (char)privoxy_tolower(*p);
}
/*
* Split the domain name into components
*/
url->pattern.url_spec.dcount = ssplit(url->pattern.url_spec.dbuffer, ".", v, SZ(v));
if (url->pattern.url_spec.dcount < 0)
{
free_pattern_spec(url);
return JB_ERR_PARSE;
}
else if (url->pattern.url_spec.dcount != 0)
{
/*
* Save a copy of the pointers in dvec
*/
size = (size_t)url->pattern.url_spec.dcount * sizeof(*url->pattern.url_spec.dvec);
url->pattern.url_spec.dvec = malloc_or_die(size);
memcpy(url->pattern.url_spec.dvec, v, size);
}
/*
* else dcount == 0 in which case we needn't do anything,
* since dvec will never be accessed and the pattern will
* match all domains.
*/
return JB_ERR_OK;
}
/*********************************************************************
*
* Function : simplematch
*
* Description : String matching, with a (greedy) '*' wildcard that
* stands for zero or more arbitrary characters and
* character classes in [], which take both enumerations
* and ranges.
*
* Parameters :
* 1 : pattern = pattern for matching
* 2 : text = text to be matched
*
* Returns : 0 if match, else nonzero
*
*********************************************************************/
static int simplematch(const char *pattern, const char *text)
{
const unsigned char *pat = (const unsigned char *)pattern;
const unsigned char *txt = (const unsigned char *)text;
const unsigned char *fallback = pat;
int wildcard = 0;
unsigned char lastchar = 'a';
unsigned i;
unsigned char charmap[32];
while (*txt)
{
/* EOF pattern but !EOF text? */
if (*pat == '\0')
{
if (wildcard)
{
pat = fallback;
}
else
{
return 1;
}
}
/* '*' in the pattern? */
if (*pat == '*')
{
/* The pattern ends afterwards? Speed up the return. */
if (*++pat == '\0')
{
return 0;
}
/* Else, set wildcard mode and remember position after '*' */
wildcard = 1;
fallback = pat;
}
/* Character range specification? */
if (*pat == '[')
{
memset(charmap, '\0', sizeof(charmap));
while (*++pat != ']')
{
if (!*pat)
{
return 1;
}
else if (*pat == '-')
{
if ((*++pat == ']') || *pat == '\0')
{
return(1);
}
for (i = lastchar; i <= *pat; i++)
{
charmap[i / 8] |= (unsigned char)(1 << (i % 8));
}
}
else
{
charmap[*pat / 8] |= (unsigned char)(1 << (*pat % 8));
lastchar = *pat;
}