1303167Ssobomax/*- 2303167Ssobomax * Copyright (c) 2004 Max Khon 3303167Ssobomax * Copyright (c) 2014 Juniper Networks, Inc. 4303167Ssobomax * Copyright (c) 2006-2016 Maxim Sobolev <sobomax@FreeBSD.org> 5303167Ssobomax * All rights reserved. 6303167Ssobomax * 7303167Ssobomax * Redistribution and use in source and binary forms, with or without 8303167Ssobomax * modification, are permitted provided that the following conditions 9303167Ssobomax * are met: 10303167Ssobomax * 1. Redistributions of source code must retain the above copyright 11303167Ssobomax * notice, this list of conditions and the following disclaimer. 12303167Ssobomax * 2. Redistributions in binary form must reproduce the above copyright 13303167Ssobomax * notice, this list of conditions and the following disclaimer in the 14303167Ssobomax * documentation and/or other materials provided with the distribution. 15303167Ssobomax * 16303167Ssobomax * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17303167Ssobomax * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18303167Ssobomax * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19303167Ssobomax * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20303167Ssobomax * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21303167Ssobomax * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22303167Ssobomax * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23303167Ssobomax * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24303167Ssobomax * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25303167Ssobomax * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26303167Ssobomax * SUCH DAMAGE. 27303167Ssobomax */ 28303167Ssobomax 29303167Ssobomax#include <sys/cdefs.h> 30303167Ssobomax__FBSDID("$FreeBSD$"); 31303167Ssobomax 32303167Ssobomax#include <sys/types.h> 33303167Ssobomax#include <sys/systm.h> 34303167Ssobomax#include <sys/malloc.h> 35303167Ssobomax 36303167Ssobomax#include <net/zlib.h> 37303167Ssobomax 38303167Ssobomax#include <geom/uzip/g_uzip.h> 39303167Ssobomax#include <geom/uzip/g_uzip_dapi.h> 40303167Ssobomax#include <geom/uzip/g_uzip_zlib.h> 41303167Ssobomax 42303167Ssobomaxstruct g_uzip_zlib { 43303167Ssobomax uint32_t blksz; 44303167Ssobomax struct g_uzip_dapi pub; 45303167Ssobomax /* Zlib decoder structs */ 46303167Ssobomax z_stream zs; 47303167Ssobomax}; 48303167Ssobomax 49303167Ssobomaxstatic void *z_alloc(void *, u_int, u_int); 50303167Ssobomaxstatic void z_free(void *, void *); 51303167Ssobomaxstatic int g_uzip_zlib_rewind(struct g_uzip_dapi *, const char *); 52303167Ssobomax 53303167Ssobomaxstatic void 54303167Ssobomaxg_uzip_zlib_free(struct g_uzip_dapi *zpp) 55303167Ssobomax{ 56303167Ssobomax struct g_uzip_zlib *zp; 57303167Ssobomax 58303167Ssobomax zp = (struct g_uzip_zlib *)zpp->pvt; 59303167Ssobomax inflateEnd(&zp->zs); 60303167Ssobomax free(zp, M_GEOM_UZIP); 61303167Ssobomax} 62303167Ssobomax 63303167Ssobomaxstatic int 64303167Ssobomaxg_uzip_zlib_decompress(struct g_uzip_dapi *zpp, const char *gp_name, void *ibp, 65303167Ssobomax size_t ilen, void *obp) 66303167Ssobomax{ 67303167Ssobomax int err; 68303167Ssobomax struct g_uzip_zlib *zp; 69303167Ssobomax 70303167Ssobomax zp = (struct g_uzip_zlib *)zpp->pvt; 71303167Ssobomax 72303167Ssobomax zp->zs.next_in = ibp; 73303167Ssobomax zp->zs.avail_in = ilen; 74303167Ssobomax zp->zs.next_out = obp; 75303167Ssobomax zp->zs.avail_out = zp->blksz; 76303167Ssobomax 77303167Ssobomax err = (inflate(&zp->zs, Z_FINISH) != Z_STREAM_END) ? 1 : 0; 78303167Ssobomax if (err != 0) { 79303167Ssobomax printf("%s: UZIP(zlib) inflate() failed\n", gp_name); 80303167Ssobomax } 81303167Ssobomax return (err); 82303167Ssobomax} 83303167Ssobomax 84303167Ssobomaxstatic int 85303167Ssobomaxg_uzip_zlib_rewind(struct g_uzip_dapi *zpp, const char *gp_name) 86303167Ssobomax{ 87303167Ssobomax int err; 88303167Ssobomax struct g_uzip_zlib *zp; 89303167Ssobomax 90303167Ssobomax zp = (struct g_uzip_zlib *)zpp->pvt; 91303167Ssobomax 92303167Ssobomax err = 0; 93303167Ssobomax if (inflateReset(&zp->zs) != Z_OK) { 94303167Ssobomax printf("%s: UZIP(zlib) decoder reset failed\n", gp_name); 95303167Ssobomax err = 1; 96303167Ssobomax } 97303167Ssobomax return (err); 98303167Ssobomax} 99303167Ssobomax 100303167Ssobomaxstatic int 101303167Ssobomaxz_compressBound(int len) 102303167Ssobomax{ 103303167Ssobomax 104303167Ssobomax return (len + (len >> 12) + (len >> 14) + 11); 105303167Ssobomax} 106303167Ssobomax 107303167Ssobomaxstruct g_uzip_dapi * 108303167Ssobomaxg_uzip_zlib_ctor(uint32_t blksz) 109303167Ssobomax{ 110303167Ssobomax struct g_uzip_zlib *zp; 111303167Ssobomax 112303167Ssobomax zp = malloc(sizeof(struct g_uzip_zlib), M_GEOM_UZIP, M_WAITOK); 113303167Ssobomax zp->zs.zalloc = z_alloc; 114303167Ssobomax zp->zs.zfree = z_free; 115303167Ssobomax if (inflateInit(&zp->zs) != Z_OK) { 116303167Ssobomax goto e1; 117303167Ssobomax } 118303167Ssobomax zp->blksz = blksz; 119303167Ssobomax zp->pub.max_blen = z_compressBound(blksz); 120303167Ssobomax zp->pub.decompress = &g_uzip_zlib_decompress; 121303167Ssobomax zp->pub.free = &g_uzip_zlib_free; 122303167Ssobomax zp->pub.rewind = &g_uzip_zlib_rewind; 123303167Ssobomax zp->pub.pvt = (void *)zp; 124303167Ssobomax return (&zp->pub); 125303167Ssobomaxe1: 126303167Ssobomax free(zp, M_GEOM_UZIP); 127303167Ssobomax return (NULL); 128303167Ssobomax} 129303167Ssobomax 130303167Ssobomaxstatic void * 131303167Ssobomaxz_alloc(void *nil, u_int type, u_int size) 132303167Ssobomax{ 133303167Ssobomax void *ptr; 134303167Ssobomax 135303167Ssobomax ptr = malloc(type * size, M_GEOM_UZIP, M_NOWAIT); 136303167Ssobomax 137303167Ssobomax return (ptr); 138303167Ssobomax} 139303167Ssobomax 140303167Ssobomaxstatic void 141303167Ssobomaxz_free(void *nil, void *ptr) 142303167Ssobomax{ 143303167Ssobomax 144303167Ssobomax free(ptr, M_GEOM_UZIP); 145303167Ssobomax} 146