2 * Copyright (c) 2005 Michael Bushkov <bushman@rsu.ru>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #ifndef __NSCD_QUERY_H__
28 #define __NSCD_QUERY_H__
36 struct configuration_entry;
38 typedef int (*query_process_func)(struct query_state *);
39 typedef void (*query_destroy_func)(struct query_state *);
40 typedef ssize_t (*query_read_func)(struct query_state *, void *, size_t);
41 typedef ssize_t (*query_write_func)(struct query_state *, const void *, size_t);
44 * The query state structure contains the information to process all types of
45 * requests and to send all types of responses.
48 struct timeval creation_time;
49 struct timeval timeout;
51 struct comm_element request;
52 struct comm_element response;
53 struct configuration_entry *config_entry;
56 query_process_func process_func; /* called on each event */
57 query_destroy_func destroy_func; /* called on destroy */
60 * By substituting these functions we can opaquely send and received
63 query_write_func write_func; /* data write function */
64 query_read_func read_func; /* data read function */
66 char *eid_str; /* the user-identifying string (euid_egid_) */
67 size_t eid_str_length;
69 uid_t euid; /* euid of the caller, received via getpeereid */
70 uid_t uid; /* uid of the caller, received via credentials */
71 gid_t egid; /* egid of the caller, received via getpeereid */
72 gid_t gid; /* gid of the caller received via credentials */
74 size_t io_buffer_size;
75 size_t io_buffer_watermark;
76 size_t kevent_watermark; /* bytes to be sent/received */
77 int sockfd; /* the unix socket to read/write */
78 int kevent_filter; /* EVFILT_READ or EVFILT_WRITE */
79 int socket_failed; /* set to 1 if the socket doesn't work correctly */
82 * These fields are used to opaquely proceed sending/receiving of
91 int check_query_eids(struct query_state *);
93 ssize_t query_io_buffer_read(struct query_state *, void *, size_t);
94 ssize_t query_io_buffer_write(struct query_state *, const void *, size_t);
96 ssize_t query_socket_read(struct query_state *, void *, size_t);
97 ssize_t query_socket_write(struct query_state *, const void *, size_t);
99 struct query_state *init_query_state(int, size_t, uid_t, gid_t);
100 void destroy_query_state(struct query_state *);