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