varnish-cache/lib/libvarnishapi/vsl_arg.c
0
/*-
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 * Copyright (c) 2006 Verdens Gang AS
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 * Copyright (c) 2006-2015 Varnish Software AS
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 * All rights reserved.
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 *
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 * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
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 * Author: Martin Blix Grydeland <martin@varnish-software.com>
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 *
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 * SPDX-License-Identifier: BSD-2-Clause
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include "config.h"
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#include <ctype.h>
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#include <limits.h>
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#include <math.h>
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#include <stdio.h>
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#include <stdlib.h>
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40
#include "vdef.h"
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#include "vas.h"
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#include "miniobj.h"
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44
#include "vbm.h"
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#include "vnum.h"
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#include "vqueue.h"
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#include "vre.h"
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#include "vsb.h"
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#include "vapi/vsl.h"
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#include "vsl_api.h"
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54
/*--------------------------------------------------------------------
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 * Look up a tag
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 *   0..255     tag number
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 *   -1         no tag matches
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 *   -2         multiple tags match
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 */
60
61
int
62 39375
VSL_Name2Tag(const char *name, int l)
63
{
64
        int i, n;
65
66 39375
        if (l == -1)
67 3717
                l = strlen(name);
68 39375
        n = -1;
69 1799679
        for (i = 0; i < SLT__MAX; i++) {
70 1799343
                if (VSL_tags[i] != NULL &&
71 1705536
                    !strncasecmp(name, VSL_tags[i], l)) {
72 39753
                        if (strlen(VSL_tags[i]) == l) {
73
                                /* Exact match */
74 39039
                                return (i);
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                        }
76 714
                        if (n == -1)
77 84
                                n = i;
78
                        else
79 630
                                n = -2;
80 714
                }
81 1760304
        }
82 336
        return (n);
83 39375
}
84
85
int
86 4935
VSL_Glob2Tags(const char *glob, int l, VSL_tagfind_f *func, void *priv)
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{
88 4935
        const char *p1 = NULL;
89 4935
        const char *p2 = NULL;
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        const char *e, *p;
91 4935
        int i, l1 = 0, l2 = 0, r = 0;
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93 4935
        AN(glob);
94 4935
        if (l >= 0)
95 1239
                e = glob + l;
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        else
97 3696
                e = strchr(glob, '\0');
98 4935
        if (glob == e)
99 42
                return (-1);            // Empty pattern cannot match
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101 39900
        for (p = glob; p < e; p++)
102 35448
                if (*p == '*')
103 441
                        break;
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105 4893
        if (p == e) {                   // No wildcard
106 4452
                i = VSL_Name2Tag(glob, l);
107 4452
                if (i < 0)
108 189
                        return (i);
109 4263
                if (func != NULL)
110 4263
                        (func)(i, priv);
111 4263
                return (1);
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        }
113
114 441
        if (p != glob) {                // Prefix match
115 294
                p1 = glob;
116 294
                l1 = p - p1;
117 294
        }
118
119 441
        if (p != e - 1) {               // Postfix match
120 210
                p2 = p + 1;
121 210
                l2 = e - p2;
122 210
        }
123
124 840
        for (p++; p < e; p++)
125 525
                if (*p == '*')
126 126
                        return (-3);    // More than one wildcard
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128 80955
        for (i = 0; i < SLT__MAX; i++) {
129 80640
                p = VSL_tags[i];
130 80640
                if (p == NULL)
131 51345
                        continue;
132 29295
                e = strchr(p, '\0');
133 29295
                if ((e - p) - l1 < l2)
134 2058
                        continue;
135 27237
                if (p1 != NULL && strncasecmp(p, p1, l1))
136 19761
                        continue;
137 7476
                if (p2 != NULL && strncasecmp(e - l2, p2, l2))
138 3360
                        continue;
139 4116
                if (func != NULL)
140 4116
                        (func)(i, priv);
141 4116
                r++;
142 4116
        }
143 315
        if (r == 0)
144 21
                return (-1);
145 294
        return (r);
146 4935
}
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int
149 966
VSL_List2Tags(const char *list, int l, VSL_tagfind_f *func, void *priv)
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{
151
        const char *p, *b, *e;
152 966
        int r, t = 0;
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154 966
        p = list;
155 966
        if (l >= 0)
156 63
                e = p + l;
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        else
158 903
                e = strchr(p, '\0');
159 2016
        while (p < e) {
160 1575
                while (p < e && *p == ',')
161 336
                        p++;
162 1239
                if (p == e)
163 21
                        break;
164 1218
                b = p;
165 8064
                while (p < e && *p != ',')
166 6846
                        p++;
167 1218
                r = VSL_Glob2Tags(b, p - b, func, priv);
168 1218
                if (r < 0)
169 168
                        return (r);
170 1050
                t += r;
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        }
172 798
        if (t == 0)
173 21
                return (-1);
174 777
        return (t);
175 966
}
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const char *VSLQ_grouping[VSL_g__MAX] = {
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        [VSL_g_raw]     = "raw",
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        [VSL_g_vxid]    = "vxid",
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        [VSL_g_request] = "request",
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        [VSL_g_session] = "session",
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};
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int
185 4725
VSLQ_Name2Grouping(const char *name, int l)
186
{
187
        int i, n;
188
189 4725
        AN(name);
190 4725
        if (l == -1)
191 294
                l = strlen(name);
192 4725
        n = -1;
193 8463
        for (i = 0; i < VSL_g__MAX; i++) {
194 8421
                if (!strncasecmp(name, VSLQ_grouping[i], l)) {
195 4725
                        if (strlen(VSLQ_grouping[i]) == l) {
196
                                /* Exact match */
197 4683
                                return (i);
198
                        }
199 42
                        if (n == -1)
200 21
                                n = i;
201
                        else
202 21
                                n = -2;
203 42
                }
204 3738
        }
205 42
        return (n);
206 4725
}
207
208
void v_matchproto_(VSL_tagfind_f)
209 3822
vsl_vbm_bitset(int bit, void *priv)
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{
211
212 3822
        vbit_set((struct vbitmap *)priv, bit);
213 3822
}
214
215
void v_matchproto_(VSL_tagfind_f)
216 882
vsl_vbm_bitclr(int bit, void *priv)
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{
218
219 882
        vbit_clr((struct vbitmap *)priv, bit);
220 882
}
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222
static int
223 798
vsl_ix_arg(struct VSL_data *vsl, int opt, const char *arg)
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{
225
        int i;
226
227 798
        CHECK_OBJ_NOTNULL(vsl, VSL_MAGIC);
228 798
        vsl->flags |= F_SEEN_ixIX;
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230 1596
        i = VSL_List2Tags(arg, -1, opt == 'x' ? vsl_vbm_bitset : vsl_vbm_bitclr,
231 798
            vsl->vbm_suppress);
232 798
        if (i == -1)
233 42
                return (vsl_diag(vsl, "-%c: \"%s\" matches zero tags",
234 21
                    (char)opt, arg));
235 777
        else if (i == -2)
236 42
                return (vsl_diag(vsl, "-%c: \"%s\" is ambiguous",
237 21
                    (char)opt, arg));
238 756
        else if (i == -3)
239 84
                return (vsl_diag(vsl, "-%c: Syntax error in \"%s\"",
240 42
                    (char)opt, arg));
241
242 714
        return (1);
243 798
}
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245
static int
246 168
vsl_IX_arg(struct VSL_data *vsl, int opt, const char *arg)
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{
248
        int i, l, off, err;
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        const char *b, *e;
250
        vre_t *vre;
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        struct vsb vsb[1];
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        struct vslf *vslf;
253 168
        struct vbitmap *tags = NULL;
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        char errbuf[VRE_ERROR_LEN];
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256
257 168
        CHECK_OBJ_NOTNULL(vsl, VSL_MAGIC);
258 168
        AN(arg);
259 168
        vsl->flags |= F_SEEN_ixIX;
260
261 168
        b = arg;
262 168
        e = strchr(b, ':');
263 168
        if (e) {
264 63
                tags = vbit_new(SLT__MAX);
265 63
                AN(tags);
266 63
                l = e - b;
267 63
                i = VSL_List2Tags(b, l, vsl_vbm_bitset, tags);
268 63
                if (i < 0)
269 63
                        vbit_destroy(tags);
270 63
                if (i == -1)
271 42
                        return (vsl_diag(vsl,
272
                            "-%c: \"%*.*s\" matches zero tags",
273 21
                            (char)opt, l, l, b));
274 42
                else if (i == -2)
275 42
                        return (vsl_diag(vsl,
276
                            "-%c: \"%*.*s\" is ambiguous",
277 21
                            (char)opt, l, l, b));
278 21
                else if (i <= -3)
279 42
                        return (vsl_diag(vsl,
280
                            "-%c: Syntax error in \"%*.*s\"",
281 21
                            (char)opt, l, l, b));
282 0
                b = e + 1;
283 0
        }
284
285 105
        vre = VRE_compile(b, vsl->C_opt ? VRE_CASELESS : 0, &err, &off, 1);
286 105
        if (vre == NULL) {
287 21
                if (tags)
288 0
                        vbit_destroy(tags);
289 21
                AN(VSB_init(vsb, errbuf, sizeof errbuf));
290 21
                AZ(VRE_error(vsb, err));
291 21
                AZ(VSB_finish(vsb));
292 21
                VSB_fini(vsb);
293 42
                return (vsl_diag(vsl, "-%c: Regex error at position %d (%s)",
294 21
                    (char)opt, off, errbuf));
295
        }
296
297 84
        ALLOC_OBJ(vslf, VSLF_MAGIC);
298 84
        AN(vslf);
299 84
        vslf->tags = tags;
300 84
        vslf->vre = vre;
301
302 84
        if (opt == 'I')
303 42
                VTAILQ_INSERT_TAIL(&vsl->vslf_select, vslf, list);
304
        else {
305 42
                assert(opt == 'X');
306 42
                VTAILQ_INSERT_TAIL(&vsl->vslf_suppress, vslf, list);
307
        }
308
309 84
        return (1);
310 168
}
311
312
static int
313 231
vsl_R_arg(struct VSL_data *vsl, const char *arg)
314
{
315 231
        char buf[32] = "";
316
        char *p;
317
        long l;
318
319 231
        AN(arg);
320 231
        CHECK_OBJ_NOTNULL(vsl, VSL_MAGIC);
321
322 231
        errno = 0;
323 231
        l = strtol(arg, &p, 0);
324 231
        if ((l == LONG_MIN || l == LONG_MAX) && errno == ERANGE)
325 0
                return (vsl_diag(vsl, "-R: Range error"));
326 231
        if (l <= 0 || l > INT_MAX)
327 63
                return (vsl_diag(vsl, "-R: Range error"));
328 168
        vsl->R_opt_l = l;
329 168
        assert(p != arg);
330 168
        AN(p);
331 168
        if (*p == '\0') {
332 0
                vsl->R_opt_p = 1.0;
333 0
                return (1);
334
        }
335 168
        if (*p != '/' || p[1] == '\0')
336 21
                return (vsl_diag(vsl, "-R: Syntax error"));
337 147
        p++;
338 147
        if (strlen(p) > sizeof(buf) - 2)
339 21
                return (vsl_diag(vsl, "-R: Syntax error"));
340 126
        if (!isdigit(*p))
341 63
                strcat(buf, "1");
342 126
        strcat(buf, p);
343 126
        vsl->R_opt_p = VNUM_duration(buf);
344 126
        if (isnan(vsl->R_opt_p) || vsl->R_opt_p <= 0.0)
345 84
                return (vsl_diag(vsl, "-R: Syntax error: Invalid duration"));
346 42
        return (1);
347 231
}
348
349
int
350 3318
VSL_Arg(struct VSL_data *vsl, int opt, const char *arg)
351
{
352
        int i;
353
        char *p;
354
        double d;
355
        long l;
356
357 3318
        CHECK_OBJ_NOTNULL(vsl, VSL_MAGIC);
358
        /* If first option is 'i', set all bits for suppression */
359 3318
        if ((opt == 'i' || opt == 'I') && !(vsl->flags & F_SEEN_ixIX))
360 145719
                for (i = 0; i < SLT__MAX; i++)
361 145719
                        vbit_set(vsl->vbm_suppress, i);
362
363 3318
        switch (opt) {
364 315
        case 'b': vsl->b_opt = 1; return (1);
365 1470
        case 'c': vsl->c_opt = 1; return (1);
366
        case 'C':
367
                /* Caseless regular expressions */
368 42
                vsl->C_opt = 1;
369 42
                return (1);
370
        case 'E':
371 189
                vsl->E_opt = 1;
372 189
                vsl->c_opt = 1;
373 189
                return (1);
374 798
        case 'i': case 'x': return (vsl_ix_arg(vsl, opt, arg));
375 168
        case 'I': case 'X': return (vsl_IX_arg(vsl, opt, arg));
376
        case 'L':
377 21
                AN(arg);
378 21
                l = strtol(arg, &p, 0);
379 21
                while (isspace(*p))
380 0
                        p++;
381 21
                if (*p != '\0')
382 0
                        return (vsl_diag(vsl, "-L: Syntax error"));
383 21
                if (l <= 0 || l > INT_MAX)
384 21
                        return (vsl_diag(vsl, "-L: Range error"));
385 0
                vsl->L_opt = (int)l;
386 0
                return (1);
387
        case 'R':
388 231
                return (vsl_R_arg(vsl, arg));
389
        case 'T':
390 21
                AN(arg);
391 21
                d = VNUM(arg);
392 21
                if (isnan(d))
393 0
                        return (vsl_diag(vsl, "-T: Syntax error"));
394 21
                if (d < 0.)
395 0
                        return (vsl_diag(vsl, "-T: Range error"));
396 21
                vsl->T_opt = d;
397 21
                return (1);
398 21
        case 'v': vsl->v_opt = 1; return (1);
399
        default:
400 42
                return (0);
401
        }
402 3318
}