varnish-cache/vmod/vmod_std_conversions.c
0
/*-
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 * Copyright (c) 2010-2015 Varnish Software AS
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 * All rights reserved.
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 *
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 * Author: Poul-Henning Kamp <phk@FreeBSD.org>
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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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 */
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#include "config.h"
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#include <ctype.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include "cache/cache.h"
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#include "vnum.h"
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#include "vsa.h"
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#include "vss.h"
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#include "vtim.h"
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#include "vcc_std_if.h"
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48
/*
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 * technically, as our VCL_INT is int64_t, its limits are INT64_MIN
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 * .. INT64_MAX.
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 *
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 * We redistrict to VRT_INTEGER_MIN .. VRT_INTEGER_MAX
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 */
54
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/* limited by using double for conversions */
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#define VCL_BYTES_MAX ((INT64_C(1)<<53)-1)
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58
static
59 1552
int onearg(VRT_CTX, const char *f, int nargs)
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{
61 1552
        if (nargs == 1)
62 1544
                return (1);
63 16
        VRT_fail(ctx, "std.%s: %s arguments", f,
64 8
            nargs > 1 ? "too many" : "not enough");
65 8
        return (0);
66 1552
}
67
68
/*
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 * not handling real arg isfinite() / nan() : caller error
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 * always trunc, never round
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 */
72
73
VCL_DURATION v_matchproto_(td_std_duration)
74 216
vmod_duration(VRT_CTX, struct VARGS(duration) *a)
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{
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        double r;
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        int nargs;
78
79 216
        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
80
81 216
        nargs = a->valid_s + a->valid_real + a->valid_integer;
82
83 216
        if (!onearg(ctx, "duration", nargs))
84 0
                return (0);
85
86 216
        if (a->valid_real)
87 24
                return ((VCL_DURATION)a->real);
88
89 192
        if (a->valid_integer)
90 16
                return ((VCL_DURATION)a->integer);
91
92 176
        if (a->valid_s) {
93 176
                r = VNUM_duration(a->s);
94 176
                if (!isnan(r))
95 96
                        return (r);
96 80
        }
97
98 80
        if (a->valid_fallback)
99 56
                return (a->fallback);
100
101 24
        VRT_fail(ctx, "std.duration: conversion failed");
102 24
        return (0);
103 216
}
104
105
VCL_BYTES v_matchproto_(td_std_bytes)
106 120
vmod_bytes(VRT_CTX, struct VARGS(bytes) *a)
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{
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        uintmax_t r;
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        VCL_REAL rr;
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        int nargs;
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        const char *errtxt;
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113 120
        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
114
115 120
        nargs = a->valid_s + a->valid_real + a->valid_integer;
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117 120
        if (!onearg(ctx, "bytes", nargs))
118 0
                return (0);
119
120 120
        if (a->valid_s) {
121 88
                errtxt = VNUM_2bytes(a->s, &r, 0);
122 88
                if (errtxt == NULL && r <= VCL_BYTES_MAX)
123 36
                        return ((VCL_BYTES)r);
124 52
        }
125
126 84
        if (a->valid_real && !isnan(a->real) && a->real >= 0) {
127 20
                rr = trunc(a->real);
128 20
                if (rr <= (VCL_REAL)VCL_BYTES_MAX)
129 20
                        return ((VCL_BYTES)rr);
130 0
        }
131
132 64
        if (a->valid_integer && a->integer >= 0)
133 12
                return ((VCL_BYTES)a->integer);
134
135 52
        if (a->valid_fallback)
136 48
                return (a->fallback);
137
138 4
        VRT_fail(ctx, "std.bytes: conversion failed");
139 4
        return (0);
140 120
}
141
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VCL_INT v_matchproto_(td_std_integer)
143 576
vmod_integer(VRT_CTX, struct VARGS(integer) *a)
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{
145 576
        const char *p, *errtxt = NULL;
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        double r, tmp;
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        int nargs;
148
149 576
        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
150
151 1728
        nargs = a->valid_s + a->valid_bool + a->valid_bytes +
152 1152
            a->valid_duration + a->valid_real + a->valid_time;
153
154 576
        if (!onearg(ctx, "integer", nargs))
155 8
                return (0);
156
157 568
        r = NAN;
158 568
        if (a->valid_bool)
159 4
                return (a->bool ? 1 : 0);
160
161 564
        if (a->valid_bytes)
162 8
                return (a->bytes);
163
164 556
        if (a->valid_s && a->s != NULL) {
165 416
                p = a->s;
166 416
                r = SF_Parse_Number(&p, 0, &errtxt);
167 416
                if (!errno && *p == '\0' && modf(r, &tmp) == 0.0)
168 352
                        return ((VCL_INT)r);
169 64
                r = NAN;
170 64
        }
171
172 204
        if (a->valid_duration)
173 12
                r = a->duration;
174
175 204
        if (a->valid_real)
176 20
                r = a->real;
177
178 204
        if (a->valid_time)
179 16
                r = a->time;
180
181 204
        if (!isnan(r)) {
182 48
                r = trunc(r);
183 48
                if (r >= VRT_INTEGER_MIN && r <= VRT_INTEGER_MAX)
184 48
                        return ((VCL_INT)r);
185 0
        }
186
187 156
        if (a->valid_fallback)
188 136
                return (a->fallback);
189
190 20
        if (errtxt != NULL)
191 8
                VRT_fail(ctx, "std.integer: conversion failed: %s", errtxt);
192
        else
193 12
                VRT_fail(ctx, "std.integer: conversion failed");
194 20
        return (0);
195 576
}
196
197
VCL_IP
198 356
vmod_ip(VRT_CTX, struct VARGS(ip) *a)
199
{
200
        uintptr_t sn;
201
        void *p;
202 356
        VCL_IP retval = NULL, fb = bogo_ip;
203
204 356
        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
205
206 356
        if (a->valid_fallback) {
207 96
                if (a->fallback == NULL || !VSA_Sane(a->fallback)) {
208 0
                        VRT_fail(ctx, "std.ip: invalid fallback");
209 0
                        return (fb);
210
                }
211 96
                fb = a->fallback;
212 96
        }
213
214 356
        sn = WS_Snapshot(ctx->ws);
215 356
        p = WS_Alloc(ctx->ws, vsa_suckaddr_len);
216 356
        if (p == NULL) {
217 0
                VRT_fail(ctx, "std.ip: insufficient workspace");
218 0
                return (fb);
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        }
220
221 356
        if (a->s != NULL)
222 352
                retval = VSS_ResolveFirst(
223 352
                    p, a->s, a->valid_p ? a->p : "80",
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                    AF_UNSPEC, SOCK_STREAM,
225 352
                    a->resolve ? 0 : AI_NUMERICHOST|AI_NUMERICSERV);
226
227 356
        if (retval != NULL)
228 300
                return (retval);
229
230 56
        WS_Reset(ctx->ws, sn);
231
232 56
        if (!a->valid_fallback)
233 0
                VRT_fail(ctx, "std.ip: conversion failed");
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235 56
        return (fb);
236 356
}
237
238
VCL_REAL v_matchproto_(td_std_real)
239 240
vmod_real(VRT_CTX, struct VARGS(real) *a)
240
{
241
        VCL_REAL r;
242 240
        const char *p, *errtxt = NULL;
243
        int nargs;
244
245 240
        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
246
247 720
        nargs = a->valid_s + a->valid_integer + a->valid_bool + a->valid_bytes +
248 480
            a->valid_duration + a->valid_time;
249
250 240
        if (!onearg(ctx, "real", nargs))
251 0
                return (0);
252
253 240
        if (a->valid_integer)
254 12
                return ((VCL_REAL)a->integer);
255
256 228
        if (a->valid_bool)
257 4
                return ((VCL_REAL)(a->bool ? 1 : 0));
258
259 224
        if (a->valid_bytes)
260 8
                return ((VCL_REAL)a->bytes);
261
262 216
        if (a->valid_duration)
263 12
                return ((VCL_REAL)a->duration);
264
265 204
        if (a->valid_time)
266 8
                return ((VCL_REAL)a->time);
267
268 196
        if (a->valid_s && a->s != NULL) {
269 168
                p = a->s;
270 168
                r = SF_Parse_Decimal(&p, 0, &errtxt);
271 168
                if (!errno && *p == '\0')
272 140
                        return (r);
273 28
        }
274
275 56
        if (a->valid_fallback)
276 36
                return (a->fallback);
277
278 20
        if (errtxt != NULL)
279 8
                VRT_fail(ctx, "std.real: conversion failed: %s", errtxt);
280
        else
281 12
                VRT_fail(ctx, "std.real: conversion failed");
282 20
        return (0);
283 240
}
284
285
VCL_REAL v_matchproto_(td_std_round)
286 8
vmod_round(VRT_CTX, VCL_REAL r)
287
{
288 8
        (void) ctx;
289 8
        return (round(r));
290
}
291
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VCL_TIME v_matchproto_(td_std_time)
293 400
vmod_time(VRT_CTX, struct VARGS(time)* a)
294
{
295
        double r;
296
        int nargs;
297
298 400
        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
299
300 400
        nargs = a->valid_s + a->valid_real + a->valid_integer;
301
302 400
        if (!onearg(ctx, "time", nargs))
303 0
                return (0);
304
305 400
        if (a->valid_integer)
306 8
                return ((VCL_REAL)a->integer);
307
308 392
        if (a->valid_real)
309 12
                return ((VCL_REAL)a->real);
310
311 380
        if (a->valid_s && a->s != NULL) {
312 368
                r = VTIM_parse(a->s);
313 368
                if (r)
314 120
                        return (r);
315
316 248
                r = VNUM(a->s);
317
318 248
                if (!isnan(r) && r > 0)
319 56
                        return (r);
320 192
        }
321
322 204
        if (a->valid_fallback)
323 204
                return (a->fallback);
324
325 0
        VRT_fail(ctx, "std.time: conversion failed");
326 0
        return (0);
327 400
}
328
329
VCL_STRING v_matchproto_(td_std_strftime)
330 88
vmod_strftime(VRT_CTX, VCL_TIME t, VCL_STRING fmt)
331
{
332
        struct tm tm;
333
        time_t tt;
334
        size_t r;
335
        unsigned spc;
336
        char *s;
337
338 88
        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
339
340 88
        tt = (time_t)(intmax_t)t;
341 88
        if (gmtime_r(&tt, &tm) == NULL)
342 0
                return ("");
343
344 88
        spc = WS_ReserveAll(ctx->ws);
345 88
        s = WS_Reservation(ctx->ws);
346 88
        r = strftime(s, spc, fmt, &tm);
347 88
        if (r == 0) {
348 4
                WS_Release(ctx->ws, 0);
349 4
                return ("");
350
        }
351 84
        r++;
352 84
        WS_Release(ctx->ws, r);
353 84
        return (s);
354 88
}
355
356
/* These functions are deprecated as of 2019-03-15 release */
357
358
VCL_INT v_matchproto_(td_std_real2integer)
359 16
vmod_real2integer(VRT_CTX, VCL_REAL r, VCL_INT i)
360
{
361
        VCL_INT retval;
362
363 16
        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
364
365 16
        if (!VRT_REAL_is_valid(r))
366 8
                return (i);
367 8
        retval = (VCL_INT)round(r);
368 8
        if (!VRT_INT_is_valid(retval))
369 0
                return (i);
370 8
        return (retval);
371 16
}
372
373
VCL_TIME v_matchproto_(td_std_real2time)
374 24
vmod_real2time(VRT_CTX, VCL_REAL r, VCL_TIME t)
375
{
376 24
        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
377
378 24
        if (!isfinite(r))
379 0
                return (t);
380
381 24
        return (r);
382 24
}
383
384
VCL_INT v_matchproto_(td_std_time2integer)
385 8
vmod_time2integer(VRT_CTX, VCL_TIME t, VCL_INT i)
386
{
387 8
        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
388
389 8
        if (!isfinite(t))
390 0
                return (i);
391 8
        t = round(t);
392 8
        if (t > VRT_INTEGER_MAX || t < VRT_INTEGER_MIN)
393 0
                return (i);
394 8
        return ((VCL_INT)t);
395 8
}
396
397
VCL_REAL v_matchproto_(td_std_time2real)
398 8
vmod_time2real(VRT_CTX, VCL_TIME t, VCL_REAL r)
399
{
400 8
        CHECK_OBJ_NOTNULL(ctx, VRT_CTX_MAGIC);
401
402 8
        if (!isfinite(t))
403 0
                return (r);
404
405 8
        return (t);
406 8
}