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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_ */