contrib/bind-9.2.4rc7/lib/bind/irs/nis.c

   1 /*
   2  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (c) 1996-1999 by Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  15  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #if defined(LIBC_SCCS) && !defined(lint)
  19 static const char rcsid[] = "$Id: nis.c,v 1.1.2.1 2004/03/09 09:17:33 marka Exp $";
  20 #endif
  21
  22 /* Imports */
  23
  24 #include "port_before.h"
  25
  26 #ifdef WANT_IRS_NIS
  27
  28 #include <rpc/rpc.h>
  29 #include <rpc/xdr.h>
  30 #include <rpcsvc/yp_prot.h>
  31 #include <rpcsvc/ypclnt.h>
  32
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include <errno.h>
  36
  37 #include <sys/types.h>
  38 #include <netinet/in.h>
  39 #ifdef T_NULL
  40 #undef T_NULL                   /* Silence re-definition warning of T_NULL. */
  41 #endif
  42 #include <arpa/nameser.h>
  43 #include <resolv.h>
  44
  45 #include <isc/memcluster.h>
  46 #include <irs.h>
  47
  48 #include "port_after.h"
  49
  50 #include "irs_p.h"
  51 #include "hesiod.h"
  52 #include "nis_p.h"
  53
  54 /* Forward */
  55
  56 static void             nis_close(struct irs_acc *);
  57 static struct __res_state * nis_res_get(struct irs_acc *);
  58 static void             nis_res_set(struct irs_acc *, struct __res_state *,
  59                                 void (*)(void *));
  60
  61 /* Public */
  62
  63 struct irs_acc *
  64 irs_nis_acc(const char *options) {
  65         struct nis_p *nis;
  66         struct irs_acc *acc;
  67         char *domain;
  68
  69         UNUSED(options);
  70
  71         if (yp_get_default_domain(&domain) != 0)
  72                 return (NULL);
  73         if (!(nis = memget(sizeof *nis))) {
  74                 errno = ENOMEM;
  75                 return (NULL);
  76         }
  77         memset(nis, 0, sizeof *nis);
  78         if (!(acc = memget(sizeof *acc))) {
  79                 memput(nis, sizeof *nis);
  80                 errno = ENOMEM;
  81                 return (NULL);
  82         }
  83         memset(acc, 0x5e, sizeof *acc);
  84         acc->private = nis;
  85         nis->domain = strdup(domain);
  86 #ifdef WANT_IRS_GR
  87         acc->gr_map = irs_nis_gr;
  88 #else
  89         acc->gr_map = NULL;
  90 #endif
  91 #ifdef WANT_IRS_PW
  92         acc->pw_map = irs_nis_pw;
  93 #else
  94         acc->pw_map = NULL;
  95 #endif
  96         acc->sv_map = irs_nis_sv;
  97         acc->pr_map = irs_nis_pr;
  98         acc->ho_map = irs_nis_ho;
  99         acc->nw_map = irs_nis_nw;
 100         acc->ng_map = irs_nis_ng;
 101         acc->res_get = nis_res_get;
 102         acc->res_set = nis_res_set;
 103         acc->close = nis_close;
 104         return (acc);
 105 }
 106
 107 /* Methods */
 108
 109 static struct __res_state *
 110 nis_res_get(struct irs_acc *this) {
 111         struct nis_p *nis = (struct nis_p *)this->private;
 112
 113         if (nis->res == NULL) {
 114                 struct __res_state *res;
 115                 res = (struct __res_state *)malloc(sizeof *res);
 116                 if (res == NULL)
 117                         return (NULL);
 118                 memset(res, 0, sizeof *res);
 119                 nis_res_set(this, res, free);
 120         }
 121
 122         if ((nis->res->options & RES_INIT) == 0 &&
 123             res_ninit(nis->res) < 0)
 124                 return (NULL);
 125
 126         return (nis->res);
 127 }
 128
 129 static void
 130 nis_res_set(struct irs_acc *this, struct __res_state *res,
 131                 void (*free_res)(void *)) {
 132         struct nis_p *nis = (struct nis_p *)this->private;
 133
 134         if (nis->res && nis->free_res) {
 135                 res_nclose(nis->res);
 136                 (*nis->free_res)(nis->res);
 137         }
 138
 139         nis->res = res;
 140         nis->free_res = free_res;
 141 }
 142
 143 static void
 144 nis_close(struct irs_acc *this) {
 145         struct nis_p *nis = (struct nis_p *)this->private;
 146
 147         if (nis->res && nis->free_res)
 148                 (*nis->free_res)(nis->res);
 149         free(nis->domain);
 150         memput(nis, sizeof *nis);
 151         memput(this, sizeof *this);
 152 }
 153
 154 #endif /*WANT_IRS_NIS*/