1/*
2 * Copyright (c) 2006 Niels Provos <provos@citi.umich.edu>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 * 3. The name of the author may not be used to endorse or promote products
14 *    derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27#ifndef _EVRPC_INTERNAL_H_
28#define _EVRPC_INTERNAL_H_
29
30#include "http-internal.h"
31
32struct evrpc;
33
34#define EVRPC_URI_PREFIX "/.rpc."
35
36struct evrpc_hook {
37	TAILQ_ENTRY(evrpc_hook) (next);
38
39	/* returns -1; if the rpc should be aborted, is allowed to rewrite */
40	int (*process)(struct evhttp_request *, struct evbuffer *, void *);
41	void *process_arg;
42};
43
44TAILQ_HEAD(evrpc_hook_list, evrpc_hook);
45
46/*
47 * this is shared between the base and the pool, so that we can reuse
48 * the hook adding functions; we alias both evrpc_pool and evrpc_base
49 * to this common structure.
50 */
51struct _evrpc_hooks {
52	/* hooks for processing outbound and inbound rpcs */
53	struct evrpc_hook_list in_hooks;
54	struct evrpc_hook_list out_hooks;
55};
56
57#define input_hooks common.in_hooks
58#define output_hooks common.out_hooks
59
60struct evrpc_base {
61	struct _evrpc_hooks common;
62
63	/* the HTTP server under which we register our RPC calls */
64	struct evhttp* http_server;
65
66	/* a list of all RPCs registered with us */
67	TAILQ_HEAD(evrpc_list, evrpc) registered_rpcs;
68};
69
70struct evrpc_req_generic;
71void evrpc_reqstate_free(struct evrpc_req_generic* rpc_state);
72
73/* A pool for holding evhttp_connection objects */
74struct evrpc_pool {
75	struct _evrpc_hooks common;
76
77	struct event_base *base;
78
79	struct evconq connections;
80
81	int timeout;
82
83	TAILQ_HEAD(evrpc_requestq, evrpc_request_wrapper) requests;
84};
85
86
87#endif /* _EVRPC_INTERNAL_H_ */
88