usr/src/cmd/nscd/getserv.c

   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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #pragma ident   "%Z%%M% %I%     %E% SMI"
  27
  28 /*
  29  * Routines to handle getserv* calls in nscd
  30  */
  31
  32 #include <strings.h>
  33 #include "cache.h"
  34
  35
  36 #define name_db ctx->nsc_db[0]
  37 #define port_db ctx->nsc_db[1]
  38
  39 #define NSC_NAME_SERVICES_BYNAME        "getservbyname"
  40 #define NSC_NAME_SERVICES_BYPORT        "getservbyport"
  41
  42 static void servname_getlogstr(char *, char *, size_t, nss_XbyY_args_t *);
  43 static int servname_compar(const void *, const void *);
  44 static uint_t servname_gethash(nss_XbyY_key_t *, int);
  45
  46 static void servport_getlogstr(char *, char *, size_t, nss_XbyY_args_t *);
  47 static int servport_compar(const void *, const void *);
  48 static uint_t servport_gethash(nss_XbyY_key_t *, int);
  49
  50 void
  51 serv_init_ctx(nsc_ctx_t *ctx) {
  52         ctx->dbname = NSS_DBNAM_SERVICES;
  53         ctx->file_name = "/etc/services";
  54         ctx->db_count = 2;
  55         name_db = make_cache(nsc_key_other,
  56                         NSS_DBOP_SERVICES_BYNAME,
  57                         NSC_NAME_SERVICES_BYNAME,
  58                         servname_compar,
  59                         servname_getlogstr,
  60                         servname_gethash, nsc_ht_default, -1);
  61
  62         port_db = make_cache(nsc_key_other,
  63                         NSS_DBOP_SERVICES_BYPORT,
  64                         NSC_NAME_SERVICES_BYPORT,
  65                         servport_compar,
  66                         servport_getlogstr,
  67                         servport_gethash, nsc_ht_default, -1);
  68 }
  69
  70 static int
  71 servname_compar(const void *n1, const void *n2) {
  72         nsc_entry_t     *e1, *e2;
  73         int             res, l1, l2;
  74
  75         e1 = (nsc_entry_t *)n1;
  76         e2 = (nsc_entry_t *)n2;
  77
  78         /* compare protocol */
  79         if (e1->key.serv.proto == NULL && e2->key.serv.proto)
  80                 return (-1);
  81         if (e1->key.serv.proto && e2->key.serv.proto == NULL)
  82                 return (1);
  83         if (e1->key.serv.proto) {
  84                 l1 = strlen(e1->key.serv.proto);
  85                 l2 = strlen(e2->key.serv.proto);
  86                 res = strncmp(e1->key.serv.proto, e2->key.serv.proto,
  87                         (l1 > l2)?l1:l2);
  88                 if (res > 0)
  89                         return (1);
  90                 if (res < 0)
  91                         return (-1);
  92         }
  93
  94         /* compare service name */
  95         l1 = strlen(e1->key.serv.serv.name);
  96         l2 = strlen(e2->key.serv.serv.name);
  97         res = strncmp(e1->key.serv.serv.name, e2->key.serv.serv.name,
  98                         (l1 > l2)?l1:l2);
  99         return (_NSC_INT_KEY_CMP(res, 0));
 100 }
 101
 102 static uint_t
 103 servname_gethash(nss_XbyY_key_t *key, int htsize) {
 104         return (ces_gethash(key->serv.serv.name, htsize));
 105 }
 106
 107 static void
 108 servname_getlogstr(char *name, char *whoami, size_t len,
 109                         nss_XbyY_args_t *argp) {
 110         (void) snprintf(whoami, len, "%s [key=%s, %s]",
 111                         name,
 112                         argp->key.serv.serv.name,
 113                         check_null(argp->key.serv.proto));
 114 }
 115
 116 static int
 117 servport_compar(const void *n1, const void *n2) {
 118         nsc_entry_t     *e1, *e2;
 119         int             res, l1, l2;
 120
 121         e1 = (nsc_entry_t *)n1;
 122         e2 = (nsc_entry_t *)n2;
 123
 124         /* compare protocol */
 125         if (e1->key.serv.proto == NULL && e2->key.serv.proto)
 126                 return (-1);
 127         if (e1->key.serv.proto && e2->key.serv.proto == NULL)
 128                 return (1);
 129         if (e1->key.serv.proto) {
 130                 l1 = strlen(e1->key.serv.proto);
 131                 l2 = strlen(e2->key.serv.proto);
 132                 res = strncmp(e1->key.serv.proto, e2->key.serv.proto,
 133                                 (l1 > l2)?l1:l2);
 134                 if (res > 0)
 135                         return (1);
 136                 if (res < 0)
 137                         return (-1);
 138         }
 139
 140         /* compare port */
 141         return (_NSC_INT_KEY_CMP(e1->key.serv.serv.port,
 142                         e2->key.serv.serv.port));
 143 }
 144
 145 static uint_t
 146 servport_gethash(nss_XbyY_key_t *key, int htsize) {
 147         return (db_gethash(&key->serv.serv.port,
 148                         sizeof (key->serv.serv.port), htsize));
 149 }
 150
 151 static void
 152 servport_getlogstr(char *name, char *whoami, size_t len,
 153                         nss_XbyY_args_t *argp) {
 154         (void) snprintf(whoami, len, "%s [key=%d, %s]",
 155                         name,
 156                         argp->key.serv.serv.port,
 157                         check_null(argp->key.serv.proto));
 158 }