1/* $NetBSD: info_hesiod.c,v 1.1.1.3 2015/01/17 16:34:15 christos Exp $ */ 2 3/* 4 * Copyright (c) 1997-2014 Erez Zadok 5 * Copyright (c) 1989 Jan-Simon Pendry 6 * Copyright (c) 1989 Imperial College of Science, Technology & Medicine 7 * Copyright (c) 1989 The Regents of the University of California. 8 * All rights reserved. 9 * 10 * This code is derived from software contributed to Berkeley by 11 * Jan-Simon Pendry at Imperial College, London. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * 38 * File: am-utils/amd/info_hesiod.c 39 * 40 */ 41 42/* 43 * Get info from Hesiod 44 */ 45 46#ifdef HAVE_CONFIG_H 47# include <config.h> 48#endif /* HAVE_CONFIG_H */ 49#include <am_defs.h> 50#include <amd.h> 51#include <sun_map.h> 52 53#define HES_PREFIX "hesiod." 54#define HES_PREFLEN 7 55 56#ifdef HAVE_HESIOD_INIT 57/* bsdi3 does not define this extern in any header file */ 58extern char **hesiod_resolve(void *context, const char *name, const char *type); 59extern int hesiod_init(void **context); 60static voidp hesiod_context; 61#endif /* HAVE_HESIOD_INIT */ 62 63/* forward declarations */ 64int amu_hesiod_init(mnt_map *m, char *map, time_t *tp); 65int hesiod_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp); 66int hesiod_isup(mnt_map *m, char *map); 67 68/* 69 * No easy way to probe the server - check the map name begins with "hesiod." 70 * Note: this name includes 'amu_' so as to not conflict with libhesiod's 71 * hesiod_init() function. 72 */ 73int 74amu_hesiod_init(mnt_map *m, char *map, time_t *tp) 75{ 76 dlog("amu_hesiod_init(%s)", map); 77 *tp = 0; 78 79#ifdef HAVE_HESIOD_INIT 80 if (!hesiod_context && hesiod_init(&hesiod_context) != 0) 81 return ENOENT; 82#endif /* HAVE_HESIOD_INIT */ 83 84 return NSTREQ(map, HES_PREFIX, HES_PREFLEN) ? 0 : ENOENT; 85} 86 87 88/* 89 * Do a Hesiod nameserver call. 90 * Modify time is ignored by Hesiod - XXX 91 */ 92int 93hesiod_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp) 94{ 95 char hes_key[MAXPATHLEN]; 96 char **rvec; 97#ifndef HAVE_HESIOD_INIT 98 int error; 99#endif /* not HAVE_HESIOD_INIT */ 100 101 dlog("hesiod_search(m=%lx, map=%s, key=%s, pval=%lx tp=%lx)", 102 (unsigned long) m, map, key, (unsigned long) pval, (unsigned long) tp); 103 104 if (key[0] == '.') 105 return ENOENT; 106 107 xsnprintf(hes_key, sizeof(hes_key), "%s.%s", key, map + HES_PREFLEN); 108 109 /* 110 * Call the resolver 111 */ 112 dlog("Hesiod base is: %s\n", gopt.hesiod_base); 113 dlog("hesiod_search: hes_resolve(%s, %s)", hes_key, gopt.hesiod_base); 114 if (amuDebug(D_INFO)) 115 _res.options |= RES_DEBUG; 116 117#ifdef HAVE_HESIOD_INIT 118 /* new style hesiod */ 119 rvec = hesiod_resolve(hesiod_context, hes_key, gopt.hesiod_base); 120#else /* not HAVE_HESIOD_INIT */ 121 rvec = hes_resolve(hes_key, gopt.hesiod_base); 122#endif /* not HAVE_HESIOD_INIT */ 123 124 /* 125 * If a reply was forthcoming then return 126 * it (and free subsequent replies) 127 */ 128 if (rvec && *rvec) { 129 if (m->cfm && (m->cfm->cfm_flags & CFM_SUN_MAP_SYNTAX)) { 130 *pval = sun_entry2amd(key, *rvec); 131 XFREE(*rvec); 132 } else 133 *pval = *rvec; 134 while (*++rvec) 135 XFREE(*rvec); 136 return 0; 137 } 138 139#ifdef HAVE_HESIOD_INIT 140 /* new style hesiod */ 141 return errno; 142#else /* not HAVE_HESIOD_INIT */ 143 /* 144 * Otherwise reflect the hesiod error into a Un*x error 145 */ 146 dlog("hesiod_search: Error: %d", hes_error()); 147 switch (hes_error()) { 148 case HES_ER_NOTFOUND: 149 error = ENOENT; 150 break; 151 case HES_ER_CONFIG: 152 error = EIO; 153 break; 154 case HES_ER_NET: 155 error = ETIMEDOUT; 156 break; 157 default: 158 error = EINVAL; 159 break; 160 } 161 dlog("hesiod_search: Returning: %d", error); 162 return error; 163#endif /* not HAVE_HESIOD_INIT */ 164} 165 166 167/* 168 * Check if Hesiod is up, so we can determine if to clear the map or not. 169 * Test it by querying for /defaults. 170 * Returns: 0 if Hesiod is down, 1 if it is up. 171 */ 172int 173hesiod_isup(mnt_map *m, char *map) 174{ 175 int error; 176 char *val; 177 time_t mtime; 178 static int last_status = 1; /* assume up by default */ 179 180 error = hesiod_search(m, map, "/defaults", &val, &mtime); 181 dlog("hesiod_isup(%s): %s", map, strerror(error)); 182 if (error != 0 && error != ENOENT) { 183 plog(XLOG_ERROR, 184 "hesiod_isup: error getting `/defaults' entry in map %s: %m", map); 185 last_status = 0; 186 return 0; /* Hesiod is down */ 187 } 188 if (last_status == 0) { /* if was down before */ 189 plog(XLOG_INFO, "hesiod_isup: Hesiod came back up for map %s", map); 190 last_status = 1; 191 } 192 return 1; /* Hesiod is up */ 193} 194