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) 1988-1992 Sun Microsystems Inc 24 * All Rights Reserved. 25 * 26 * nis/getservent.c -- "nis" backend for nsswitch "services" database 27 */ 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include "nis_common.h" 32 #include <stdio.h> 33 #include <string.h> 34 #include <signal.h> 35 #include <malloc.h> 36 #include <netdb.h> 37 #include <synch.h> 38 #include <rpcsvc/ypclnt.h> 39 #include <thread.h> 40 #include <sys/types.h> 41 #include <netinet/in.h> 42 43 static int 44 check_name(args) 45 nss_XbyY_args_t *args; 46 { 47 struct servent *serv = (struct servent *) args->returnval; 48 const char *name = args->key.serv.serv.name; 49 const char *proto = args->key.serv.proto; 50 char **aliasp; 51 52 if (proto != 0 && strcmp(serv->s_proto, proto) != 0) { 53 return (0); 54 } 55 if (strcmp(serv->s_name, name) == 0) { 56 return (1); 57 } 58 for (aliasp = serv->s_aliases; *aliasp != 0; aliasp++) { 59 if (strcmp(*aliasp, name) == 0) { 60 return (1); 61 } 62 } 63 return (0); 64 } 65 66 static mutex_t no_byname_lock = DEFAULTMUTEX; 67 static int no_byname_map = 0; 68 69 static nss_status_t 70 getbyname(be, a) 71 nis_backend_ptr_t be; 72 void *a; 73 { 74 nss_XbyY_args_t *argp = (nss_XbyY_args_t *) a; 75 const char *name = argp->key.serv.serv.name; 76 const char *proto = argp->key.serv.proto; 77 int no_map; 78 sigset_t oldmask, newmask; 79 80 sigfillset(&newmask); 81 (void) _thr_sigsetmask(SIG_SETMASK, &newmask, &oldmask); 82 (void) _mutex_lock(&no_byname_lock); 83 no_map = no_byname_map; 84 (void) _mutex_unlock(&no_byname_lock); 85 (void) _thr_sigsetmask(SIG_SETMASK, &oldmask, NULL); 86 87 if (no_map == 0) { 88 int yp_status; 89 nss_status_t res; 90 91 if (proto == 0) { 92 res = _nss_nis_lookup(be, argp, 1, 93 "services.byservicename", name, &yp_status); 94 } else { 95 char *key = malloc(strlen(name) + strlen(proto) + 3); 96 97 if (key == 0) { 98 return (NSS_UNAVAIL); 99 } 100 sprintf(key, "%s/%s", name, proto); 101 res = _nss_nis_lookup(be, argp, 1, 102 "services.byservicename", key, &yp_status); 103 free(key); 104 } 105 106 if (yp_status == YPERR_MAP) { 107 sigfillset(&newmask); 108 _thr_sigsetmask(SIG_SETMASK, &newmask, &oldmask); 109 _mutex_lock(&no_byname_lock); 110 no_byname_map = 1; 111 _mutex_unlock(&no_byname_lock); 112 _thr_sigsetmask(SIG_SETMASK, &oldmask, (sigset_t*)NULL); 113 } else /* if (res == NSS_SUCCESS) <==== */ { 114 return (res); 115 } 116 } 117 118 return (_nss_nis_XY_all(be, argp, 1, name, check_name)); 119 } 120 121 static int 122 check_port(args) 123 nss_XbyY_args_t *args; 124 { 125 struct servent *serv = (struct servent *) args->returnval; 126 127 /* 128 * We only resorted to _nss_nis_XY_all because proto == 0, so just... 129 */ 130 return (serv->s_port == args->key.serv.serv.port); 131 } 132 133 static nss_status_t 134 getbyport(be, a) 135 nis_backend_ptr_t be; 136 void *a; 137 { 138 nss_XbyY_args_t *argp = (nss_XbyY_args_t *) a; 139 int port = ntohs(argp->key.serv.serv.port); 140 const char *proto = argp->key.serv.proto; 141 char *key; 142 nss_status_t res; 143 144 if (proto == 0) { 145 char portstr[12]; 146 147 sprintf(portstr, "%d", port); 148 return (_nss_nis_XY_all(be, argp, 1, portstr, check_port)); 149 } 150 151 if ((key = malloc(strlen(proto) + 14)) == 0) { 152 return (NSS_UNAVAIL); 153 } 154 sprintf(key, "%d/%s", port, proto); 155 156 res = _nss_nis_lookup(be, argp, 1, "services.byname", key, 0); 157 158 free(key); 159 return (res); 160 } 161 162 static nis_backend_op_t serv_ops[] = { 163 _nss_nis_destr, 164 _nss_nis_endent, 165 _nss_nis_setent, 166 _nss_nis_getent_netdb, 167 getbyname, 168 getbyport 169 }; 170 171 /*ARGSUSED*/ 172 nss_backend_t * 173 _nss_nis_services_constr(dummy1, dummy2, dummy3) 174 const char *dummy1, *dummy2, *dummy3; 175 { 176 return (_nss_nis_constr(serv_ops, 177 sizeof (serv_ops) / sizeof (serv_ops[0]), 178 "services.byname")); 179 } 180