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/*
* Copyright (c) 2006-2007 Niels Provos <provos@citi.umich.edu>
* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EVENT2_RPC_STRUCT_H_INCLUDED_
#define EVENT2_RPC_STRUCT_H_INCLUDED_
#ifdef __cplusplus
extern "C" {
#endif
/** @file event2/rpc_struct.h
Structures used by rpc.h. Using these structures directly may harm
forward compatibility: be careful!
*/
/* Fix so that people don't have to run with <sys/queue.h> */
#ifndef TAILQ_ENTRY
#define EVENT_DEFINED_TQENTRY_
#define TAILQ_ENTRY(type) \
struct { \
struct type *tqe_next; /* next element */ \
struct type **tqe_prev; /* address of previous next element */ \
}
#endif /* !TAILQ_ENTRY */
/**
* provides information about the completed RPC request.
*/
struct evrpc_status {
#define EVRPC_STATUS_ERR_NONE 0
#define EVRPC_STATUS_ERR_TIMEOUT 1
#define EVRPC_STATUS_ERR_BADPAYLOAD 2
#define EVRPC_STATUS_ERR_UNSTARTED 3
#define EVRPC_STATUS_ERR_HOOKABORTED 4
int error;
/* for looking at headers or other information */
struct evhttp_request *http_req;
};
/* the structure below needs to be synchronized with evrpc_req_generic */
/* Encapsulates a request */
struct evrpc {
TAILQ_ENTRY(evrpc) next;
/* the URI at which the request handler lives */
const char* uri;
/* creates a new request structure */
void *(*request_new)(void *);
void *request_new_arg;
/* frees the request structure */
void (*request_free)(void *);
/* unmarshals the buffer into the proper request structure */
int (*request_unmarshal)(void *, struct evbuffer *);
/* creates a new reply structure */
void *(*reply_new)(void *);
void *reply_new_arg;
/* frees the reply structure */
void (*reply_free)(void *);
/* verifies that the reply is valid */
int (*reply_complete)(void *);
/* marshals the reply into a buffer */
void (*reply_marshal)(struct evbuffer*, void *);
/* the callback invoked for each received rpc */
void (*cb)(struct evrpc_req_generic *, void *);
void *cb_arg;
/* reference for further configuration */
struct evrpc_base *base;
};
#ifdef EVENT_DEFINED_TQENTRY_
#undef TAILQ_ENTRY
#endif
#ifdef __cplusplus
}
#endif
#endif /* EVENT2_RPC_STRUCT_H_INCLUDED_ */
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