GCOV - Varnish Cache


/*-
 * Copyright (c) 2008-2019 Varnish Software AS
 * All rights reserved.
 *
 * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "config.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "vtc.h"
#include "vtc_http.h"
#if defined(WITH_ZLIB)
#include <zlib.h>
#else
#include "vgz.h"
#endif

#ifdef VGZ_EXTENSIONS
static void
vtc_report_gz_bits(struct vtclog *vl, const z_stream *vz)
{
        vtc_log(vl, 4, "startbit = %ju %ju/%ju",
            (uintmax_t)vz->start_bit,
            (uintmax_t)vz->start_bit >> 3, (uintmax_t)vz->start_bit & 7);
        vtc_log(vl, 4, "lastbit = %ju %ju/%ju",
            (uintmax_t)vz->last_bit,
            (uintmax_t)vz->last_bit >> 3, (uintmax_t)vz->last_bit & 7);
        vtc_log(vl, 4, "stopbit = %ju %ju/%ju",
            (uintmax_t)vz->stop_bit,
            (uintmax_t)vz->stop_bit >> 3, (uintmax_t)vz->stop_bit & 7);
}
#endif

static size_t
APOS(ssize_t sz)
{
        assert(sz >= 0);
        return (sz);
}

/**********************************************************************
 * GUNZIPery
 */

static struct vsb *
vtc_gunzip_vsb(struct vtclog *vl, int fatal, const struct vsb *vin)
{
        z_stream vz;
        struct vsb *vout;
        int i;
        char buf[BUFSIZ];

        memset(&vz, 0, sizeof vz);
        vout = VSB_new_auto();
        AN(vout);

        vz.next_in = (void*)VSB_data(vin);
        vz.avail_in = APOS(VSB_len(vin));

        assert(Z_OK == inflateInit2(&vz, 31));

        do {
                vz.next_out = (void*)buf;
                vz.avail_out = sizeof buf;
                i = inflate(&vz, Z_FINISH);
                if (vz.avail_out != sizeof buf)
                        VSB_bcat(vout, buf, sizeof buf - vz.avail_out);
        } while (i == Z_OK || i == Z_BUF_ERROR);
        if (i != Z_STREAM_END)
                vtc_log(vl, fatal,
                    "Gunzip error = %d (%s) in:%jd out:%jd len:%zd",
                    i, vz.msg, (intmax_t)vz.total_in, (intmax_t)vz.total_out,
                    VSB_len(vin));
        AZ(VSB_finish(vout));
#ifdef VGZ_EXTENSIONS
        vtc_report_gz_bits(vl, &vz);
#endif
        assert(Z_OK == inflateEnd(&vz));
        return (vout);
}

void
vtc_gunzip(struct http *hp, char *body, long *bodylen)
{
        struct vsb *vin, *vout;

        AN(body);
        if (body[0] != (char)0x1f || body[1] != (char)0x8b)
                vtc_log(hp->vl, hp->fatal,
                    "Gunzip error: body lacks gzip magic");

        vin = VSB_new_auto();
        AN(vin);
        VSB_bcat(vin, body, *bodylen);
        AZ(VSB_finish(vin));
        vout = vtc_gunzip_vsb(hp->vl, hp->fatal, vin);
        VSB_destroy(&vin);

        memcpy(body, VSB_data(vout), APOS(VSB_len(vout) + 1));
        *bodylen = APOS(VSB_len(vout));
        VSB_destroy(&vout);
        vtc_log(hp->vl, 3, "new bodylen %ld", *bodylen);
        vtc_dump(hp->vl, 4, "body", body, *bodylen);
        bprintf(hp->bodylen, "%ld", *bodylen);
}

/**********************************************************************
 * GZIPery
 */

static int
vtc_gzip_chunk(z_stream *vz, struct vsb *vout, const char *in, size_t inlen, int flush)
{
        int i;
        char buf[BUFSIZ];

        vz->next_in = TRUST_ME(in);
        vz->avail_in = APOS(inlen);
        do {
                vz->next_out = (void*)buf;
                vz->avail_out = sizeof buf;
                i = deflate(vz, flush);
                if (vz->avail_out != sizeof buf)
                        VSB_bcat(vout, buf, sizeof buf - vz->avail_out);
        } while (i == Z_OK || vz->avail_in > 0);
        vz->next_out = NULL;
        vz->avail_out = 0;
        vz->next_in = NULL;
        AZ(vz->avail_in);
        vz->avail_in = 0;
        return (i);
}

static void
vtc_gzip(struct http *hp, const char *input, char **body, long *bodylen, int fragment)
{
        struct vsb *vout;
        int i, res;
        size_t inlen = strlen(input);
        z_stream vz;

        memset(&vz, 0, sizeof vz);
        vout = VSB_new_auto();
        AN(vout);

        assert(Z_OK == deflateInit2(&vz,
            hp->gziplevel, Z_DEFLATED, 31, 9, Z_DEFAULT_STRATEGY));

        while (fragment && inlen > 3) {
                res = inlen / 3;
                i = vtc_gzip_chunk(&vz, vout, input, res, Z_BLOCK);
                if (i != Z_OK && i != Z_BUF_ERROR) {
                        vtc_log(hp->vl, hp->fatal,
                            "Gzip error = %d (%s) in:%jd out:%jd len:%zd",
                            i, vz.msg, (intmax_t)vz.total_in,
                            (intmax_t)vz.total_out, strlen(input));
                }
                input += res;
                inlen -= res;
        }

        i = vtc_gzip_chunk(&vz, vout, input, inlen, Z_FINISH);
        if (i != Z_STREAM_END) {
                vtc_log(hp->vl, hp->fatal,
                    "Gzip error = %d (%s) in:%jd out:%jd len:%zd",
                    i, vz.msg, (intmax_t)vz.total_in, (intmax_t)vz.total_out,
                    strlen(input));
        }
        AZ(VSB_finish(vout));
#ifdef VGZ_EXTENSIONS
        res = vz.stop_bit & 7;
        vtc_report_gz_bits(hp->vl, &vz);
#else
        res = 0;
#endif
        assert(Z_OK == deflateEnd(&vz));

#ifdef VGZ_EXTENSIONS
        if (hp->gzipresidual >= 0 && hp->gzipresidual != res)
                vtc_log(hp->vl, hp->fatal,
                    "Wrong gzip residual got %d wanted %d",
                    res, hp->gzipresidual);
#endif
        *body = malloc(APOS(VSB_len(vout) + 1));
        AN(*body);
        memcpy(*body, VSB_data(vout), APOS(VSB_len(vout) + 1));
        *bodylen = APOS(VSB_len(vout));
        VSB_destroy(&vout);
        vtc_log(hp->vl, 3, "new bodylen %ld", *bodylen);
        vtc_dump(hp->vl, 4, "body", *body, *bodylen);
        bprintf(hp->bodylen, "%ld", *bodylen);
}

int
vtc_gzip_cmd(struct http *hp, char * const *av, char **body, long *bodylen)
{
        char *b;

        AN(hp);
        AN(av);
        AN(body);
        AN(bodylen);

        if (!strcmp(*av, "-gzipresidual")) {
                hp->gzipresidual = strtoul(av[1], NULL, 0);
                return (1);
        }
        if (!strcmp(*av, "-gziplevel")) {
                hp->gziplevel = strtoul(av[1], NULL, 0);
                return (1);
        }
        if (!strcmp(*av, "-gzipbody")) {
                if (*body != NULL)
                        free(*body);
                *body = NULL;
                vtc_gzip(hp, av[1], body, bodylen, 0);
                AN(*body);
                return (2);
        }
        if (!strcmp(*av, "-gziplen")) {
                if (*body != NULL)
                        free(*body);
                *body = NULL;
                b = synth_body(av[1], 1);
                vtc_gzip(hp, b, body, bodylen, 1);
                AN(*body);
                free(b);
                return (2);
        }
        return (0);
}

		varnish-cache/bin/varnishtest/vtest2/src/vtc_gzip.c
0		/*-
1		* Copyright (c) 2008-2019 Varnish Software AS
2		* All rights reserved.
3		*
4		* Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
5		*
6		* SPDX-License-Identifier: BSD-2-Clause
7		*
8		* Redistribution and use in source and binary forms, with or without
9		* modification, are permitted provided that the following conditions
10		* are met:
11		* 1. Redistributions of source code must retain the above copyright
12		* notice, this list of conditions and the following disclaimer.
13		* 2. Redistributions in binary form must reproduce the above copyright
14		* notice, this list of conditions and the following disclaimer in the
15		* documentation and/or other materials provided with the distribution.
16		*
17		* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18		* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20		* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
21		* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22		* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23		* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24		* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25		* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26		* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27		* SUCH DAMAGE.
28		*/
29
30		#include "config.h"
31
32		#include <stdio.h>
33		#include <stdlib.h>
34		#include <string.h>
35
36		#include "vtc.h"
37		#include "vtc_http.h"
38		#if defined(WITH_ZLIB)
39		#include <zlib.h>
40		#else
41		#include "vgz.h"
42		#endif
43
44		#ifdef VGZ_EXTENSIONS
45		static void
46	204	vtc_report_gz_bits(struct vtclog vl, const z_stream vz)
47		{
48	408	vtc_log(vl, 4, "startbit = %ju %ju/%ju",
49	204	(uintmax_t)vz->start_bit,
50	204	(uintmax_t)vz->start_bit >> 3, (uintmax_t)vz->start_bit & 7);
51	408	vtc_log(vl, 4, "lastbit = %ju %ju/%ju",
52	204	(uintmax_t)vz->last_bit,
53	204	(uintmax_t)vz->last_bit >> 3, (uintmax_t)vz->last_bit & 7);
54	408	vtc_log(vl, 4, "stopbit = %ju %ju/%ju",
55	204	(uintmax_t)vz->stop_bit,
56	204	(uintmax_t)vz->stop_bit >> 3, (uintmax_t)vz->stop_bit & 7);
57	204	}
58		#endif
59
60		static size_t
61	814	APOS(ssize_t sz)
62		{
63	814	assert(sz >= 0);
64	814	return (sz);
65		}
66
67		/**********************************************************************
68		* GUNZIPery
69		*/
70
71		static struct vsb *
72	39	vtc_gunzip_vsb(struct vtclog vl, int fatal, const struct vsb vin)
73		{
74		z_stream vz;
75		struct vsb *vout;
76		int i;
77		char buf[BUFSIZ];
78
79	39	memset(&vz, 0, sizeof vz);
80	39	vout = VSB_new_auto();
81	39	AN(vout);
82
83	39	vz.next_in = (void*)VSB_data(vin);
84	39	vz.avail_in = APOS(VSB_len(vin));
85
86	39	assert(Z_OK == inflateInit2(&vz, 31));
87
88	39	do {
89	49	vz.next_out = (void*)buf;
90	49	vz.avail_out = sizeof buf;
91	49	i = inflate(&vz, Z_FINISH);
92	49	if (vz.avail_out != sizeof buf)
93	49	VSB_bcat(vout, buf, sizeof buf - vz.avail_out);
94	49	} while (i == Z_OK \|\| i == Z_BUF_ERROR);
95	39	if (i != Z_STREAM_END)
96	0	vtc_log(vl, fatal,
97		"Gunzip error = %d (%s) in:%jd out:%jd len:%zd",
98	0	i, vz.msg, (intmax_t)vz.total_in, (intmax_t)vz.total_out,
99	0	VSB_len(vin));
100	39	AZ(VSB_finish(vout));
101		#ifdef VGZ_EXTENSIONS
102	39	vtc_report_gz_bits(vl, &vz);
103		#endif
104	39	assert(Z_OK == inflateEnd(&vz));
105	39	return (vout);
106		}
107
108		void
109	39	vtc_gunzip(struct http hp, char body, long *bodylen)
110		{
111		struct vsb vin, vout;
112
113	39	AN(body);
114	39	if (body[0] != (char)0x1f \|\| body[1] != (char)0x8b)
115	0	vtc_log(hp->vl, hp->fatal,
116		"Gunzip error: body lacks gzip magic");
117
118	39	vin = VSB_new_auto();
119	39	AN(vin);
120	39	VSB_bcat(vin, body, *bodylen);
121	39	AZ(VSB_finish(vin));
122	39	vout = vtc_gunzip_vsb(hp->vl, hp->fatal, vin);
123	39	VSB_destroy(&vin);
124
125	39	memcpy(body, VSB_data(vout), APOS(VSB_len(vout) + 1));
126	39	*bodylen = APOS(VSB_len(vout));
127	39	VSB_destroy(&vout);
128	39	vtc_log(hp->vl, 3, "new bodylen %ld", *bodylen);
129	39	vtc_dump(hp->vl, 4, "body", body, *bodylen);
130	39	bprintf(hp->bodylen, "%ld", *bodylen);
131	39	}
132
133		/**********************************************************************
134		* GZIPery
135		*/
136
137		static int
138	202	vtc_gzip_chunk(z_stream vz, struct vsb vout, const char *in, size_t inlen, int flush)
139		{
140		int i;
141		char buf[BUFSIZ];
142
143	202	vz->next_in = TRUST_ME(in);
144	202	vz->avail_in = APOS(inlen);
145	202	do {
146	240	vz->next_out = (void*)buf;
147	240	vz->avail_out = sizeof buf;
148	240	i = deflate(vz, flush);
149	240	if (vz->avail_out != sizeof buf)
150	203	VSB_bcat(vout, buf, sizeof buf - vz->avail_out);
151	240	} while (i == Z_OK \|\| vz->avail_in > 0);
152	202	vz->next_out = NULL;
153	202	vz->avail_out = 0;
154	202	vz->next_in = NULL;
155	202	AZ(vz->avail_in);
156	202	vz->avail_in = 0;
157	202	return (i);
158		}
159
160		static void
161	165	vtc_gzip(struct http hp, const char input, char *body, long bodylen, int fragment)
162		{
163		struct vsb *vout;
164		int i, res;
165	165	size_t inlen = strlen(input);
166		z_stream vz;
167
168	165	memset(&vz, 0, sizeof vz);
169	165	vout = VSB_new_auto();
170	165	AN(vout);
171
172	165	assert(Z_OK == deflateInit2(&vz,
173		hp->gziplevel, Z_DEFLATED, 31, 9, Z_DEFAULT_STRATEGY));
174
175	202	while (fragment && inlen > 3) {
176	37	res = inlen / 3;
177	37	i = vtc_gzip_chunk(&vz, vout, input, res, Z_BLOCK);
178	37	if (i != Z_OK && i != Z_BUF_ERROR) {
179	0	vtc_log(hp->vl, hp->fatal,
180		"Gzip error = %d (%s) in:%jd out:%jd len:%zd",
181	0	i, vz.msg, (intmax_t)vz.total_in,
182	0	(intmax_t)vz.total_out, strlen(input));
183	0	}
184	37	input += res;
185	37	inlen -= res;
186		}
187
188	165	i = vtc_gzip_chunk(&vz, vout, input, inlen, Z_FINISH);
189	165	if (i != Z_STREAM_END) {
190	0	vtc_log(hp->vl, hp->fatal,
191		"Gzip error = %d (%s) in:%jd out:%jd len:%zd",
192	0	i, vz.msg, (intmax_t)vz.total_in, (intmax_t)vz.total_out,
193	0	strlen(input));
194	0	}
195	165	AZ(VSB_finish(vout));
196		#ifdef VGZ_EXTENSIONS
197	165	res = vz.stop_bit & 7;
198	165	vtc_report_gz_bits(hp->vl, &vz);
199		#else
200		res = 0;
201		#endif
202	165	assert(Z_OK == deflateEnd(&vz));
203
204		#ifdef VGZ_EXTENSIONS
205	165	if (hp->gzipresidual >= 0 && hp->gzipresidual != res)
206	0	vtc_log(hp->vl, hp->fatal,
207		"Wrong gzip residual got %d wanted %d",
208	0	res, hp->gzipresidual);
209		#endif
210	165	*body = malloc(APOS(VSB_len(vout) + 1));
211	165	AN(*body);
212	165	memcpy(*body, VSB_data(vout), APOS(VSB_len(vout) + 1));
213	165	*bodylen = APOS(VSB_len(vout));
214	165	VSB_destroy(&vout);
215	165	vtc_log(hp->vl, 3, "new bodylen %ld", *bodylen);
216	165	vtc_dump(hp->vl, 4, "body", body, bodylen);
217	165	bprintf(hp->bodylen, "%ld", *bodylen);
218	165	}
219
220		int
221	182	vtc_gzip_cmd(struct http hp, char const av, char body, long bodylen)
222		{
223		char *b;
224
225	182	AN(hp);
226	182	AN(av);
227	182	AN(body);
228	182	AN(bodylen);
229
230	182	if (!strcmp(*av, "-gzipresidual")) {
231	8	hp->gzipresidual = strtoul(av[1], NULL, 0);
232	8	return (1);
233		}
234	174	if (!strcmp(*av, "-gziplevel")) {
235	9	hp->gziplevel = strtoul(av[1], NULL, 0);
236	9	return (1);
237		}
238	165	if (!strcmp(*av, "-gzipbody")) {
239	161	if (*body != NULL)
240	159	free(*body);
241	161	*body = NULL;
242	161	vtc_gzip(hp, av[1], body, bodylen, 0);
243	161	AN(*body);
244	161	return (2);
245		}
246	4	if (!strcmp(*av, "-gziplen")) {
247	4	if (*body != NULL)
248	3	free(*body);
249	4	*body = NULL;
250	4	b = synth_body(av[1], 1);
251	4	vtc_gzip(hp, b, body, bodylen, 1);
252	4	AN(*body);
253	4	free(b);
254	4	return (2);
255		}
256	0	return (0);
257	182	}