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nis.c revision 1.1.1.2 
      1 /*	$NetBSD: nis.c,v 1.1.1.2 2012/09/09 16:07:51 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
      5  * Copyright (c) 1996-1999 by Internet Software Consortium.
      6  *
      7  * Permission to use, copy, modify, and distribute this software for any
      8  * purpose with or without fee is hereby granted, provided that the above
      9  * copyright notice and this permission notice appear in all copies.
     10  *
     11  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
     12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     13  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
     14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
     17  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     18  */
     19 
     20 #if defined(LIBC_SCCS) && !defined(lint)
     21 static const char rcsid[] = "Id: nis.c,v 1.3 2005/04/27 04:56:32 sra Exp ";
     22 #endif
     23 
     24 /* Imports */
     25 
     26 #include "port_before.h"
     27 
     28 #ifdef WANT_IRS_NIS
     29 
     30 #include <rpc/rpc.h>
     31 #include <rpc/xdr.h>
     32 #include <rpcsvc/yp_prot.h>
     33 #include <rpcsvc/ypclnt.h>
     34 
     35 #include <stdlib.h>
     36 #include <string.h>
     37 #include <errno.h>
     38 
     39 #include <sys/types.h>
     40 #include <netinet/in.h>
     41 #ifdef T_NULL
     42 #undef T_NULL			/* Silence re-definition warning of T_NULL. */
     43 #endif
     44 #include <arpa/nameser.h>
     45 #include <resolv.h>
     46 
     47 #include <isc/memcluster.h>
     48 #include <irs.h>
     49 
     50 #include "port_after.h"
     51 
     52 #include "irs_p.h"
     53 #include "hesiod.h"
     54 #include "nis_p.h"
     55 
     56 /* Forward */
     57 
     58 static void		nis_close(struct irs_acc *);
     59 static struct __res_state * nis_res_get(struct irs_acc *);
     60 static void		nis_res_set(struct irs_acc *, struct __res_state *,
     61 				void (*)(void *));
     62 
     63 /* Public */
     64 
     65 struct irs_acc *
     66 irs_nis_acc(const char *options) {
     67 	struct nis_p *nis;
     68 	struct irs_acc *acc;
     69 	char *domain;
     70 
     71 	UNUSED(options);
     72 
     73 	if (yp_get_default_domain(&domain) != 0)
     74 		return (NULL);
     75 	if (!(nis = memget(sizeof *nis))) {
     76 		errno = ENOMEM;
     77 		return (NULL);
     78 	}
     79 	memset(nis, 0, sizeof *nis);
     80 	if (!(acc = memget(sizeof *acc))) {
     81 		memput(nis, sizeof *nis);
     82 		errno = ENOMEM;
     83 		return (NULL);
     84 	}
     85 	memset(acc, 0x5e, sizeof *acc);
     86 	acc->private = nis;
     87 	nis->domain = strdup(domain);
     88 #ifdef WANT_IRS_GR
     89 	acc->gr_map = irs_nis_gr;
     90 #else
     91 	acc->gr_map = NULL;
     92 #endif
     93 #ifdef WANT_IRS_PW
     94 	acc->pw_map = irs_nis_pw;
     95 #else
     96 	acc->pw_map = NULL;
     97 #endif
     98 	acc->sv_map = irs_nis_sv;
     99 	acc->pr_map = irs_nis_pr;
    100 	acc->ho_map = irs_nis_ho;
    101 	acc->nw_map = irs_nis_nw;
    102 	acc->ng_map = irs_nis_ng;
    103 	acc->res_get = nis_res_get;
    104 	acc->res_set = nis_res_set;
    105 	acc->close = nis_close;
    106 	return (acc);
    107 }
    108 
    109 /* Methods */
    110 
    111 static struct __res_state *
    112 nis_res_get(struct irs_acc *this) {
    113 	struct nis_p *nis = (struct nis_p *)this->private;
    114 
    115 	if (nis->res == NULL) {
    116 		struct __res_state *res;
    117 		res = (struct __res_state *)malloc(sizeof *res);
    118 		if (res == NULL)
    119 			return (NULL);
    120 		memset(res, 0, sizeof *res);
    121 		nis_res_set(this, res, free);
    122 	}
    123 
    124 	if ((nis->res->options & RES_INIT) == 0 &&
    125 	    res_ninit(nis->res) < 0)
    126 		return (NULL);
    127 
    128 	return (nis->res);
    129 }
    130 
    131 static void
    132 nis_res_set(struct irs_acc *this, struct __res_state *res,
    133 		void (*free_res)(void *)) {
    134 	struct nis_p *nis = (struct nis_p *)this->private;
    135 
    136 	if (nis->res && nis->free_res) {
    137 		res_nclose(nis->res);
    138 		(*nis->free_res)(nis->res);
    139 	}
    140 
    141 	nis->res = res;
    142 	nis->free_res = free_res;
    143 }
    144 
    145 static void
    146 nis_close(struct irs_acc *this) {
    147 	struct nis_p *nis = (struct nis_p *)this->private;
    148 
    149 	if (nis->res && nis->free_res)
    150 		(*nis->free_res)(nis->res);
    151 	free(nis->domain);
    152 	memput(nis, sizeof *nis);
    153 	memput(this, sizeof *this);
    154 }
    155 
    156 #endif /*WANT_IRS_NIS*/
    157 
    158 /*! \file */
    159