17c478bd9Sstevel@tonic-gate /* 2*a0b85df4Sstevel * CDDL HEADER START 3*a0b85df4Sstevel * 4*a0b85df4Sstevel * The contents of this file are subject to the terms of the 5*a0b85df4Sstevel * Common Development and Distribution License, Version 1.0 only 6*a0b85df4Sstevel * (the "License"). You may not use this file except in compliance 7*a0b85df4Sstevel * with the License. 8*a0b85df4Sstevel * 9*a0b85df4Sstevel * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*a0b85df4Sstevel * or http://www.opensolaris.org/os/licensing. 11*a0b85df4Sstevel * See the License for the specific language governing permissions 12*a0b85df4Sstevel * and limitations under the License. 13*a0b85df4Sstevel * 14*a0b85df4Sstevel * When distributing Covered Code, include this CDDL HEADER in each 15*a0b85df4Sstevel * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*a0b85df4Sstevel * If applicable, add the following below this CDDL HEADER, with the 17*a0b85df4Sstevel * fields enclosed by brackets "[]" replaced with your own identifying 18*a0b85df4Sstevel * information: Portions Copyright [yyyy] [name of copyright owner] 19*a0b85df4Sstevel * 20*a0b85df4Sstevel * CDDL HEADER END 21*a0b85df4Sstevel */ 22*a0b85df4Sstevel 23*a0b85df4Sstevel /* 247c478bd9Sstevel@tonic-gate * Copyright 2003 Sun Microsystems, Inc. All rights reserved. 257c478bd9Sstevel@tonic-gate * Use is subject to license terms. 267c478bd9Sstevel@tonic-gate */ 277c478bd9Sstevel@tonic-gate 287c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 297c478bd9Sstevel@tonic-gate 307c478bd9Sstevel@tonic-gate #include <sys/modctl.h> 317c478bd9Sstevel@tonic-gate #include <sys/zmod.h> 327c478bd9Sstevel@tonic-gate #include <sys/systm.h> 337c478bd9Sstevel@tonic-gate 347c478bd9Sstevel@tonic-gate #include "zlib.h" 357c478bd9Sstevel@tonic-gate 367c478bd9Sstevel@tonic-gate /* 377c478bd9Sstevel@tonic-gate * Uncompress the buffer 'src' into the buffer 'dst'. The caller must store 387c478bd9Sstevel@tonic-gate * the expected decompressed data size externally so it can be passed in. 397c478bd9Sstevel@tonic-gate * The resulting decompressed size is then returned through dstlen. This 407c478bd9Sstevel@tonic-gate * function return Z_OK on success, or another error code on failure. 417c478bd9Sstevel@tonic-gate */ 427c478bd9Sstevel@tonic-gate int 437c478bd9Sstevel@tonic-gate z_uncompress(void *dst, size_t *dstlen, const void *src, size_t srclen) 447c478bd9Sstevel@tonic-gate { 457c478bd9Sstevel@tonic-gate z_stream zs; 467c478bd9Sstevel@tonic-gate int err; 477c478bd9Sstevel@tonic-gate 487c478bd9Sstevel@tonic-gate bzero(&zs, sizeof (zs)); 497c478bd9Sstevel@tonic-gate zs.next_in = (uchar_t *)src; 507c478bd9Sstevel@tonic-gate zs.avail_in = srclen; 517c478bd9Sstevel@tonic-gate zs.next_out = dst; 527c478bd9Sstevel@tonic-gate zs.avail_out = *dstlen; 537c478bd9Sstevel@tonic-gate 547c478bd9Sstevel@tonic-gate if ((err = inflateInit(&zs)) != Z_OK) 557c478bd9Sstevel@tonic-gate return (err); 567c478bd9Sstevel@tonic-gate 577c478bd9Sstevel@tonic-gate if ((err = inflate(&zs, Z_FINISH)) != Z_STREAM_END) { 587c478bd9Sstevel@tonic-gate (void) inflateEnd(&zs); 597c478bd9Sstevel@tonic-gate return (err == Z_OK ? Z_BUF_ERROR : err); 607c478bd9Sstevel@tonic-gate } 617c478bd9Sstevel@tonic-gate 627c478bd9Sstevel@tonic-gate *dstlen = zs.total_out; 637c478bd9Sstevel@tonic-gate return (inflateEnd(&zs)); 647c478bd9Sstevel@tonic-gate } 657c478bd9Sstevel@tonic-gate 667c478bd9Sstevel@tonic-gate static const char *const z_errmsg[] = { 677c478bd9Sstevel@tonic-gate "need dictionary", /* Z_NEED_DICT 2 */ 687c478bd9Sstevel@tonic-gate "stream end", /* Z_STREAM_END 1 */ 697c478bd9Sstevel@tonic-gate "", /* Z_OK 0 */ 707c478bd9Sstevel@tonic-gate "file error", /* Z_ERRNO (-1) */ 717c478bd9Sstevel@tonic-gate "stream error", /* Z_STREAM_ERROR (-2) */ 727c478bd9Sstevel@tonic-gate "data error", /* Z_DATA_ERROR (-3) */ 737c478bd9Sstevel@tonic-gate "insufficient memory", /* Z_MEM_ERROR (-4) */ 747c478bd9Sstevel@tonic-gate "buffer error", /* Z_BUF_ERROR (-5) */ 757c478bd9Sstevel@tonic-gate "incompatible version" /* Z_VERSION_ERROR (-6) */ 767c478bd9Sstevel@tonic-gate }; 777c478bd9Sstevel@tonic-gate 787c478bd9Sstevel@tonic-gate /* 797c478bd9Sstevel@tonic-gate * Convert a zlib error code into a string error message. 807c478bd9Sstevel@tonic-gate */ 817c478bd9Sstevel@tonic-gate const char * 827c478bd9Sstevel@tonic-gate z_strerror(int err) 837c478bd9Sstevel@tonic-gate { 847c478bd9Sstevel@tonic-gate int i = Z_NEED_DICT - err; 857c478bd9Sstevel@tonic-gate 867c478bd9Sstevel@tonic-gate if (i < 0 || i >= sizeof (z_errmsg) / sizeof (z_errmsg[0])) 877c478bd9Sstevel@tonic-gate return ("unknown error"); 887c478bd9Sstevel@tonic-gate 897c478bd9Sstevel@tonic-gate return (z_errmsg[i]); 907c478bd9Sstevel@tonic-gate } 917c478bd9Sstevel@tonic-gate 927c478bd9Sstevel@tonic-gate static struct modlmisc modlmisc = { 937c478bd9Sstevel@tonic-gate &mod_miscops, "RFC 1950 decompression routines" 947c478bd9Sstevel@tonic-gate }; 957c478bd9Sstevel@tonic-gate 967c478bd9Sstevel@tonic-gate static struct modlinkage modlinkage = { 977c478bd9Sstevel@tonic-gate MODREV_1, &modlmisc, NULL 987c478bd9Sstevel@tonic-gate }; 997c478bd9Sstevel@tonic-gate 1007c478bd9Sstevel@tonic-gate int 1017c478bd9Sstevel@tonic-gate _init(void) 1027c478bd9Sstevel@tonic-gate { 1037c478bd9Sstevel@tonic-gate return (mod_install(&modlinkage)); 1047c478bd9Sstevel@tonic-gate } 1057c478bd9Sstevel@tonic-gate 1067c478bd9Sstevel@tonic-gate int 1077c478bd9Sstevel@tonic-gate _info(struct modinfo *mip) 1087c478bd9Sstevel@tonic-gate { 1097c478bd9Sstevel@tonic-gate return (mod_info(&modlinkage, mip)); 1107c478bd9Sstevel@tonic-gate } 1117c478bd9Sstevel@tonic-gate 1127c478bd9Sstevel@tonic-gate int 1137c478bd9Sstevel@tonic-gate _fini(void) 1147c478bd9Sstevel@tonic-gate { 1157c478bd9Sstevel@tonic-gate return (mod_remove(&modlinkage)); 1167c478bd9Sstevel@tonic-gate } 117