1998-01-31 09:39:55 +01:00
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/* Copyright (c) 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1998.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _NSCD_H
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1998-10-18 17:16:22 +02:00
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#define _NSCD_H 1
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#include <pthread.h>
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#include <time.h>
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#include <sys/uio.h>
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1998-01-31 09:39:55 +01:00
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/* Version number of the daemon interface */
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1998-10-18 17:16:22 +02:00
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#define NSCD_VERSION 2
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/* Path of the file where the PID of the running system is stored. */
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#define _PATH_NSCDPID "/var/run/nscd.pid"
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/* Path for the Unix domain socket. */
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#define _PATH_NSCDSOCKET "/var/run/.nscd_socket"
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/* Path for the configuration file. */
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#define _PATH_NSCDCONF "/etc/nscd.conf"
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1998-01-31 09:39:55 +01:00
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1998-10-18 17:16:22 +02:00
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/* Handle databases. */
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typedef enum
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{
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pwddb,
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grpdb,
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hstdb,
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lastdb
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} dbtype;
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1998-01-31 09:39:55 +01:00
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1998-10-18 17:16:22 +02:00
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/* Available services. */
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1998-01-31 09:39:55 +01:00
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typedef enum
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{
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GETPWBYNAME,
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GETPWBYUID,
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GETGRBYNAME,
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GETGRBYGID,
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GETHOSTBYNAME,
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1998-10-18 17:16:22 +02:00
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GETHOSTBYNAMEv6,
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1998-01-31 09:39:55 +01:00
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GETHOSTBYADDR,
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1998-10-18 17:16:22 +02:00
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GETHOSTBYADDRv6,
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LASTDBREQ = GETHOSTBYADDRv6,
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SHUTDOWN, /* Shut the server down. */
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GETSTAT, /* Get the server statistic. */
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LASTREQ,
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1998-01-31 09:39:55 +01:00
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} request_type;
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1998-10-18 17:16:22 +02:00
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/* Structure for one hash table entry. */
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struct hashentry
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{
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request_type type; /* Which type of dataset. */
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size_t len; /* Length of key. */
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void *key; /* Pointer to key. */
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struct hashentry *next; /* Next entry in this hash bucket list. */
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time_t timeout; /* Time when this entry becomes invalid. */
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ssize_t total; /* Number of bytes in PACKET. */
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const void *packet; /* Records for the result. */
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void *data; /* The malloc()ed respond record. */
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int last; /* Nonzero if DATA should be free()d. */
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struct hashentry *dellist; /* Next record to be deleted. */
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};
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/* Structure describing one database. */
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struct database
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{
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pthread_rwlock_t lock;
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int enabled;
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int check_file;
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const char *filename;
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time_t file_mtime;
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size_t module;
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const struct iovec *disabled_iov;
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unsigned long int postimeout;
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unsigned long int negtimeout;
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unsigned long int poshit;
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unsigned long int neghit;
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unsigned long int posmiss;
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unsigned long int negmiss;
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struct hashentry **array;
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};
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1998-01-31 09:39:55 +01:00
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/* Header common to all requests */
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typedef struct
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{
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int version; /* Version number of the daemon interface. */
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request_type type; /* Service requested. */
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ssize_t key_len; /* Key length. */
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1998-01-31 09:39:55 +01:00
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} request_header;
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1998-10-18 17:16:22 +02:00
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/* Structure sent in reply to password query. Note that this struct is
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sent also if the service is disabled or there is no record found. */
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1998-01-31 09:39:55 +01:00
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typedef struct
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{
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int version;
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int found;
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ssize_t pw_name_len;
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ssize_t pw_passwd_len;
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uid_t pw_uid;
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gid_t pw_gid;
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ssize_t pw_gecos_len;
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ssize_t pw_dir_len;
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ssize_t pw_shell_len;
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} pw_response_header;
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1998-10-18 17:16:22 +02:00
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/* Structure sent in reply to group query. Note that this struct is
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sent also if the service is disabled or there is no record found. */
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1998-01-31 09:39:55 +01:00
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typedef struct
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{
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int version;
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int found;
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ssize_t gr_name_len;
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ssize_t gr_passwd_len;
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gid_t gr_gid;
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1998-10-18 17:16:22 +02:00
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ssize_t gr_mem_cnt;
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1998-01-31 09:39:55 +01:00
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} gr_response_header;
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1998-10-18 17:16:22 +02:00
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/* Structure sent in reply to host query. Note that this struct is
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sent also if the service is disabled or there is no record found. */
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1998-01-31 09:39:55 +01:00
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typedef struct
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{
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1998-10-18 17:16:22 +02:00
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int version;
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int found;
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ssize_t h_name_len;
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ssize_t h_aliases_cnt;
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int h_addrtype;
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int h_length;
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ssize_t h_addr_list_cnt;
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int error;
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} hst_response_header;
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/* Global variables. */
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extern const char *dbnames[lastdb];
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extern const char *serv2str[LASTREQ];
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extern const struct iovec pwd_iov_disabled;
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extern const struct iovec grp_iov_disabled;
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extern const struct iovec hst_iov_disabled;
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/* Number of threads to run. */
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extern int nthreads;
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/* Prototypes for global functions. */
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/* nscd.c */
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extern void termination_handler (int signum);
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extern int nscd_open_socket (void);
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/* connections.c */
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extern void nscd_init (const char *conffile);
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extern void close_sockets (void);
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extern void start_threads (void);
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/* nscd_conf.c */
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extern int nscd_parse_file (const char *fname, struct database dbs[lastdb]);
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/* nscd_stat.c */
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extern void send_stats (int fd, struct database dbs[lastdb]);
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extern int receive_print_stats (void);
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/* cache.c */
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extern struct hashentry *cache_search (int type, void *key, size_t len,
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struct database *table);
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extern void cache_add (int type, void *key, size_t len,
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const void *packet, size_t iovtotal, void *data,
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int last, time_t t, struct database *table);
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extern void prune_cache (struct database *table, time_t now);
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/* pwdcache.c */
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extern void addpwbyname (struct database *db, int fd, request_header *req,
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void *key);
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extern void addpwbyuid (struct database *db, int fd, request_header *req,
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void *key);
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/* grpcache.c */
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extern void addgrbyname (struct database *db, int fd, request_header *req,
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void *key);
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extern void addgrbygid (struct database *db, int fd, request_header *req,
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void *key);
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/* hstcache.c */
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extern void addhstbyname (struct database *db, int fd, request_header *req,
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void *key);
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extern void addhstbyaddr (struct database *db, int fd, request_header *req,
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void *key);
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extern void addhstbynamev6 (struct database *db, int fd, request_header *req,
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void *key);
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extern void addhstbyaddrv6 (struct database *db, int fd, request_header *req,
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void *key);
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#endif /* nscd.h */
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