1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 2001 by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 #include <poll.h> 28 #include <sys/time.h> 29 #include <stdlib.h> 30 #include "nis_ldap.h" 31 #include "nis_hashitem.h" 32 #include "ldap_map.h" 33 #include "ldap_parse.h" 34 35 36 /* 37 * Global structure keeping config state. Since it's created and modified 38 * while the rpc.nisd still is single-threaded, and only read in MT mode, 39 * no locking is needed. 40 */ 41 __nis_config_t ldapConfig = { 42 ini_none, /* nisplusLDAPinitialUpdate */ 43 pass_error, /* nisplusLDAPthreadCreationError */ 44 { 45 -1, /* Try forever */ 46 15 /* 15 second timeout */ 47 }, 48 de_retry, /* nisplusLDAPdumpError */ 49 { 50 -1, /* Try forever */ 51 200 /* 200 second timeout */ 52 }, 53 directory_locked, /* nisplusLDAPresyncService */ 54 accumulate, /* nisplusLDAPupdateBatching */ 55 { 56 -1, /* Not used */ 57 120 /* Accumulate for 120 seconds */ 58 }, 59 block /* nisplusLDAPexclusiveWaitMOde */ 60 }; 61 62 63 /* 64 * Utility function that accepts a (__nisdb_retry_t *), decrements the 65 * 'attempts' counter, and sleeps for 'timeout' seconds. 66 * 67 * NOTE: Don't pass a pointer into the 'ldapConfig' structure to 68 * this function. Instead, initialize a private copy to the 69 * value from 'ldapConfig'. 70 * 71 * The value of 'attempts' upon entry determines action as follows: 72 * 73 * < 0 Don't change 'attempts', sleep as indicated, return 1 74 * 75 * 0 Don't change 'attempts', only sleep if forceSleep is set, 76 * return 0 if we didn't sleep, 1 if we slept. 77 * 78 * > 0 Decrement 'attempts', sleep as indicated, return 1 79 */ 80 int 81 __nis_retry_sleep(__nisdb_retry_t *retry, int forceSleep) 82 { 83 84 if (retry == NULL) 85 return (0); 86 87 if (retry->attempts > 0) { 88 retry->attempts -= 1; 89 } else if (retry->attempts == 0 && !forceSleep) { 90 return (0); 91 } 92 93 (void) poll(NULL, 0, retry->timeout*1000); 94 95 return (1); 96 } 97 98 /* 99 * The root directory is special in NIS+; it's the only directory that 100 * doesn't appear as an entry in another directory. Hence, our method 101 * of keeping the directory/table entry expiration time in the 102 * directory/table doesn't work, and we instead implement the following 103 * interface. 104 */ 105 static time_t rootDirExpire = 0; 106 static int rootDirTtl = 0; 107 108 /* 109 * Return 1 if the root dir has expired, 0 otherwise. 110 */ 111 int 112 rootDirExpired(void) 113 { 114 struct timeval now; 115 116 (void) gettimeofday(&now, 0); 117 118 if (rootDirExpire >= now.tv_sec) 119 return (1); 120 else 121 return (0); 122 } 123 124 /* 125 * Update the expiration time of the root dir to be now plus the TTL. 126 * Also establishes the TTL if not set. 127 */ 128 int 129 touchRootDir(void) 130 { 131 struct timeval now; 132 int ttl; 133 134 (void) gettimeofday(&now, 0); 135 136 /* Do we need to initialize the TTL ? */ 137 if (rootDirTtl == 0) { 138 __nis_table_mapping_t *t; 139 140 t = __nis_find_item_mt(ROOTDIRFILE, &ldapMappingList, 0, 0); 141 if (t != 0) { 142 int interval; 143 144 interval = t->initTtlHi - t->initTtlLo + 1; 145 146 if (interval > 1) { 147 srand48(now.tv_sec); 148 ttl = (lrand48() % interval); 149 } else { 150 ttl = t->initTtlLo; 151 } 152 153 rootDirTtl = t->ttl; 154 } else { 155 ttl = rootDirTtl = 3600; 156 } 157 } else { 158 ttl = rootDirTtl; 159 } 160 161 rootDirExpire = now.tv_sec + ttl; 162 163 return (0); 164 } 165