usr/src/cmd/nscd/nscd_frontend.h

   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 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _NSCD_FRONTEND_H
  27 #define _NSCD_FRONTEND_H
  28
  29 #ifdef  __cplusplus
  30 extern "C" {
  31 #endif
  32
  33 #include "cache.h"
  34
  35 #define NSCD_N2NBUF_MAXLEN      1024 * 8
  36 #define NSCD_PHDR_MAXLEN        1024 * 8
  37 #define NSCD_LOOKUP_BUFSIZE     1024 * 16
  38 #define NSCD_DOORBUF_MAXLEN     1024 * 512
  39 #define NSCD_PHDR_LEN(hdrp)     ((hdrp)->data_off)
  40 #define NSCD_DATA_LEN(hdrp)     ((hdrp)->data_len)
  41 /* used to check clients required privileges */
  42 #define NSCD_ALL_PRIV           0
  43 #define NSCD_READ_PRIV          1
  44
  45 #define NSCD_ALLOC_LOOKUP_BUFFER(bufp, bufsiz, hdrp, space, spsiz)  \
  46         if ((hdrp)->pbufsiz <= spsiz) { \
  47                 (void) memcpy(space, (hdrp), NSCD_PHDR_LEN((hdrp))); \
  48                 bufp = space; \
  49                 bufsiz = spsiz; \
  50                 hdrp = (nss_pheader_t *)(void *)space; \
  51                 (hdrp)->pbufsiz = bufsiz; \
  52                 (hdrp)->data_len = bufsiz - (hdrp)->data_off; \
  53         } else { \
  54                 (bufp) = NULL; \
  55                 bufsiz = (hdrp)->pbufsiz; \
  56                 if (bufsiz > spsiz) \
  57                         bufsiz = NSCD_DOORBUF_MAXLEN; \
  58                 (bufp) = alloca(bufsiz); \
  59                 if ((bufp) != NULL) { \
  60                         (void) memcpy((bufp), (hdrp), NSCD_PHDR_LEN(hdrp)); \
  61                         (hdrp) = (nss_pheader_t *)(void *)(bufp); \
  62                         (hdrp)->pbufsiz = bufsiz; \
  63                         (hdrp)->data_len = bufsiz - (hdrp)->data_off; \
  64                 } else { \
  65                         NSCD_SET_STATUS((hdrp), NSS_ERROR, ENOMEM); \
  66                         (void) door_return((char *)(hdrp), \
  67                                 NSCD_PHDR_LEN(hdrp), NULL, 0); \
  68                 } \
  69         }
  70
  71 #define NSCD_SET_RETURN_ARG(hdrp, arg_size)  \
  72         if (NSCD_STATUS_IS_OK((nss_pheader_t *)(hdrp))) \
  73                 arg_size = NSCD_PHDR_LEN(hdrp) + (NSCD_DATA_LEN(hdrp) > 0 ? \
  74                 NSCD_DATA_LEN(hdrp) + 1 : 0); \
  75         else \
  76                 arg_size = NSCD_PHDR_LEN(hdrp);
  77
  78 /* prototypes */
  79 uid_t _nscd_get_client_euid();
  80 int _nscd_check_client_priv(int);
  81 int _nscd_setup_server(char *execname, char **argv);
  82 int _nscd_setup_child_server(int did);
  83 int _nscd_get_clearance(sema_t *sema);
  84 int _nscd_release_clearance(sema_t *sema);
  85 void _nscd_init_cache_sema(sema_t *sema, char *cache_name);
  86 nscd_rc_t _nscd_alloc_frontend_cfg();
  87 void _nscd_APP_check_cred(void *buf, pid_t *pidp, char *dc_str,
  88         int log_comp, int log_level);
  89 void _nscd_restart_if_cfgfile_changed();
  90 #ifdef  __cplusplus
  91 }
  92 #endif
  93
  94 #endif  /* _NSCD_FRONTEND_H */