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/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/types.h> 33 #include <sys/systm.h> 34 #include <sys/malloc.h> 35 36 #include <contrib/zlib/zlib.h> 37 #include <dev/zlib/zcalloc.h> 38 39 #include <geom/uzip/g_uzip.h> 40 #include <geom/uzip/g_uzip_dapi.h> 41 #include <geom/uzip/g_uzip_zlib.h> 42 43 struct g_uzip_zlib { 44 uint32_t blksz; 45 struct g_uzip_dapi pub; 46 /* Zlib decoder structs */ 47 z_stream zs; 48 }; 49 50 static int g_uzip_zlib_rewind(struct g_uzip_dapi *, const char *); 51 52 static void 53 g_uzip_zlib_free(struct g_uzip_dapi *zpp) 54 { 55 struct g_uzip_zlib *zp; 56 57 zp = (struct g_uzip_zlib *)zpp->pvt; 58 inflateEnd(&zp->zs); 59 free(zp, M_GEOM_UZIP); 60 } 61 62 static int 63 g_uzip_zlib_decompress(struct g_uzip_dapi *zpp, const char *gp_name, void *ibp, 64 size_t ilen, void *obp) 65 { 66 int err; 67 struct g_uzip_zlib *zp; 68 69 zp = (struct g_uzip_zlib *)zpp->pvt; 70 71 zp->zs.next_in = ibp; 72 zp->zs.avail_in = ilen; 73 zp->zs.next_out = obp; 74 zp->zs.avail_out = zp->blksz; 75 76 err = (inflate(&zp->zs, Z_FINISH) != Z_STREAM_END) ? 1 : 0; 77 if (err != 0) { 78 printf("%s: UZIP(zlib) inflate() failed\n", gp_name); 79 } 80 return (err); 81 } 82 83 static int 84 g_uzip_zlib_rewind(struct g_uzip_dapi *zpp, const char *gp_name) 85 { 86 int err; 87 struct g_uzip_zlib *zp; 88 89 zp = (struct g_uzip_zlib *)zpp->pvt; 90 91 err = 0; 92 if (inflateReset(&zp->zs) != Z_OK) { 93 printf("%s: UZIP(zlib) decoder reset failed\n", gp_name); 94 err = 1; 95 } 96 return (err); 97 } 98 99 struct g_uzip_dapi * 100 g_uzip_zlib_ctor(uint32_t blksz) 101 { 102 struct g_uzip_zlib *zp; 103 104 zp = malloc(sizeof(struct g_uzip_zlib), M_GEOM_UZIP, M_WAITOK | M_ZERO); 105 if (inflateInit(&zp->zs) != Z_OK) { 106 goto e1; 107 } 108 zp->blksz = blksz; 109 zp->pub.max_blen = compressBound(blksz); 110 zp->pub.decompress = &g_uzip_zlib_decompress; 111 zp->pub.free = &g_uzip_zlib_free; 112 zp->pub.rewind = &g_uzip_zlib_rewind; 113 zp->pub.pvt = (void *)zp; 114 return (&zp->pub); 115 e1: 116 free(zp, M_GEOM_UZIP); 117 return (NULL); 118 } 119