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 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 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 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 * 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