1 /*-
2 * Copyright (c) 2004 Max Khon
3 * Copyright (c) 2014 Juniper Networks, Inc.
4 * Copyright (c) 2006-2016 Maxim Sobolev <sobomax@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/types.h>
30 #include <sys/systm.h>
31 #include <sys/malloc.h>
32
33 #include <contrib/zlib/zlib.h>
34 #include <dev/zlib/zcalloc.h>
35
36 #include <geom/uzip/g_uzip.h>
37 #include <geom/uzip/g_uzip_dapi.h>
38 #include <geom/uzip/g_uzip_zlib.h>
39
40 struct g_uzip_zlib {
41 uint32_t blksz;
42 struct g_uzip_dapi pub;
43 /* Zlib decoder structs */
44 z_stream zs;
45 };
46
47 static int g_uzip_zlib_rewind(struct g_uzip_dapi *, const char *);
48
49 static void
g_uzip_zlib_free(struct g_uzip_dapi * zpp)50 g_uzip_zlib_free(struct g_uzip_dapi *zpp)
51 {
52 struct g_uzip_zlib *zp;
53
54 zp = (struct g_uzip_zlib *)zpp->pvt;
55 inflateEnd(&zp->zs);
56 free(zp, M_GEOM_UZIP);
57 }
58
59 static int
g_uzip_zlib_decompress(struct g_uzip_dapi * zpp,const char * gp_name,void * ibp,size_t ilen,void * obp)60 g_uzip_zlib_decompress(struct g_uzip_dapi *zpp, const char *gp_name, void *ibp,
61 size_t ilen, void *obp)
62 {
63 int err;
64 struct g_uzip_zlib *zp;
65
66 zp = (struct g_uzip_zlib *)zpp->pvt;
67
68 zp->zs.next_in = ibp;
69 zp->zs.avail_in = ilen;
70 zp->zs.next_out = obp;
71 zp->zs.avail_out = zp->blksz;
72
73 err = (inflate(&zp->zs, Z_FINISH) != Z_STREAM_END) ? 1 : 0;
74 if (err != 0) {
75 printf("%s: UZIP(zlib) inflate() failed\n", gp_name);
76 }
77 return (err);
78 }
79
80 static int
g_uzip_zlib_rewind(struct g_uzip_dapi * zpp,const char * gp_name)81 g_uzip_zlib_rewind(struct g_uzip_dapi *zpp, const char *gp_name)
82 {
83 int err;
84 struct g_uzip_zlib *zp;
85
86 zp = (struct g_uzip_zlib *)zpp->pvt;
87
88 err = 0;
89 if (inflateReset(&zp->zs) != Z_OK) {
90 printf("%s: UZIP(zlib) decoder reset failed\n", gp_name);
91 err = 1;
92 }
93 return (err);
94 }
95
96 struct g_uzip_dapi *
g_uzip_zlib_ctor(uint32_t blksz)97 g_uzip_zlib_ctor(uint32_t blksz)
98 {
99 struct g_uzip_zlib *zp;
100
101 zp = malloc(sizeof(struct g_uzip_zlib), M_GEOM_UZIP, M_WAITOK | M_ZERO);
102 if (inflateInit(&zp->zs) != Z_OK) {
103 goto e1;
104 }
105 zp->blksz = blksz;
106 zp->pub.max_blen = compressBound(blksz);
107 zp->pub.decompress = &g_uzip_zlib_decompress;
108 zp->pub.free = &g_uzip_zlib_free;
109 zp->pub.rewind = &g_uzip_zlib_rewind;
110 zp->pub.pvt = (void *)zp;
111 return (&zp->pub);
112 e1:
113 free(zp, M_GEOM_UZIP);
114 return (NULL);
115 }
116