about summary refs log tree commit diff
path: root/nscd/nscd.h
blob: af7ae9a7e57e5d7048c7c9a6cb9c10f256a259b5 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
/* Copyright (c) 1998, 1999, 2000, 2001, 2003 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Thorsten Kukuk <kukuk@suse.de>, 1998.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; 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>

/* The declarations for the request and response types are in the file
   "nscd-client.h", which should contain everything needed by client
   functions.  */
#include "nscd-client.h"


/* Handle databases.  */
typedef enum
{
  pwddb,
  grpdb,
  hstdb,
  lastdb
} dbtype;


/* 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.  */
  uid_t owner;                  /* If secure table, this is the owner.  */
  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;

  unsigned long int nentries;
  unsigned long int maxnentries;
  unsigned long int maxnsearched;

  unsigned long int rdlockdelayed;
  unsigned long int wrlockdelayed;

  struct hashentry **array;
};


/* Global variables.  */
extern struct database dbs[lastdb];
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;

/* Tables for which we cache data with uid.  */
extern int secure[lastdb];
extern int secure_in_use; /* Is one of the above 1?  */

/* User name to run server processes as.  */
extern const char *server_user;

/* Name and UID of user who is allowed to request statistics.  */
extern const char *stat_user;
extern uid_t stat_uid;

/* Time the server was started.  */
extern time_t start_time;

/* Number of times clients had to wait.  */
extern unsigned long int client_queued;

/* Prototypes for global functions.  */

/* nscd.c */
extern void termination_handler (int signum) __attribute__ ((__noreturn__));
extern int nscd_open_socket (void);

/* connections.c */
extern void nscd_init (void);
extern void close_sockets (void);
extern void start_threads (void) __attribute__ ((__noreturn__));

/* 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) __attribute__ ((__noreturn__));

/* cache.c */
extern struct hashentry *cache_search (request_type, void *key, size_t len,
				       struct database *table, uid_t owner);
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,
		       uid_t owner);
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, uid_t uid);
extern void addpwbyuid (struct database *db, int fd, request_header *req,
			void *key, uid_t uid);

/* grpcache.c */
extern void addgrbyname (struct database *db, int fd, request_header *req,
			 void *key, uid_t uid);
extern void addgrbygid (struct database *db, int fd, request_header *req,
			void *key, uid_t uid);

/* hstcache.c */
extern void addhstbyname (struct database *db, int fd, request_header *req,
			  void *key, uid_t uid);
extern void addhstbyaddr (struct database *db, int fd, request_header *req,
			  void *key, uid_t uid);
extern void addhstbynamev6 (struct database *db, int fd, request_header *req,
			    void *key, uid_t uid);
extern void addhstbyaddrv6 (struct database *db, int fd, request_header *req,
			    void *key, uid_t uid);


#endif /* nscd.h */