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    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: 
   32: struct evrpc;
   33: 
   34: #define EVRPC_URI_PREFIX "/.rpc."
   35: 
   36: struct 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: 
   44: TAILQ_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:  */
   51: struct _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: 
   60: struct 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: 
   70: struct evrpc_req_generic;
   71: void evrpc_reqstate_free(struct evrpc_req_generic* rpc_state);
   72: 
   73: /* A pool for holding evhttp_connection objects */
   74: struct 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_ */