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/*
* Copyright (c) 2017 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
*/
#include <config.h>
#include <LongBow/runtime.h>
#include <parc/algol/parc_EventScheduler.h>
#include <parc/algol/parc_EventSocket.h>
#include <parc/algol/parc_FileOutputStream.h>
#include <parc/logging/parc_Log.h>
#include <parc/logging/parc_LogReporterFile.h>
static int _parc_event_socket_debug_enabled = 0;
#define parcEventSocket_LogDebug(parcEventSocket, ...) \
if (_parc_event_socket_debug_enabled) \
parcLog_Debug(parcEventScheduler_GetLogger(parcEventSocket->eventScheduler), __VA_ARGS__)
/**
* Current implementation based on top of libevent2
*/
#include <sys/errno.h>
#include <event2/listener.h>
/**
* @typedef PARCEventSocket
* @brief A structure containing private event state
*/
struct PARCEventSocket {
struct evconnlistener *listener;
// Event scheduler we have been queued with
PARCEventScheduler *eventScheduler;
// Interpose on EventSocket callbacks
PARCEventSocket_Callback *socketCallback;
void *socketUserData;
PARCEventSocket_ErrorCallback *socketErrorCallback;
void *socketErrorUserData;
};
static void
_parc_evconn_callback(struct evconnlistener *listener, evutil_socket_t fd,
struct sockaddr *address, int socklen, void *ctx)
{
PARCEventSocket *parcEventSocket = (PARCEventSocket *) ctx;
parcEventSocket_LogDebug(parcEventSocket, "_parc_evconn_callback(fd=%d,,parcEventSocket=%p)\n", fd, parcEventSocket);
parcEventSocket->socketCallback((int) fd, address, socklen, parcEventSocket->socketUserData);
}
static void
_parc_evconn_error_callback(struct evconnlistener *listener, void *ctx)
{
PARCEventSocket *parcEventSocket = (PARCEventSocket *) ctx;
int error = EVUTIL_SOCKET_ERROR();
char *errorString = evutil_socket_error_to_string(error);
parcEventSocket_LogDebug(parcEventSocket,
"_parc_evconn_error_callback(error=%d,errorString=%s,parcEventSocket=%p)\n",
error, errorString, parcEventSocket);
parcEventSocket->socketErrorCallback(parcEventSocket->eventScheduler,
error, errorString, parcEventSocket->socketErrorUserData);
}
PARCEventSocket *
parcEventSocket_Create(PARCEventScheduler *eventScheduler,
PARCEventSocket_Callback *callback,
PARCEventSocket_ErrorCallback *errorCallback,
void *userData, const struct sockaddr *sa, int socklen)
{
PARCEventSocket *parcEventSocket = parcMemory_AllocateAndClear(sizeof(PARCEventSocket));
assertNotNull(parcEventSocket, "parcMemory_Allocate(%zu) returned NULL", sizeof(PARCEventSocket));
parcEventSocket->eventScheduler = eventScheduler;
parcEventSocket->socketCallback = callback;
parcEventSocket->socketErrorCallback = errorCallback;
parcEventSocket->socketUserData = userData;
parcEventSocket->socketErrorUserData = userData;
parcEventSocket->listener = evconnlistener_new_bind(parcEventScheduler_GetEvBase(eventScheduler),
_parc_evconn_callback, parcEventSocket,
LEV_OPT_REUSEABLE | LEV_OPT_CLOSE_ON_FREE, -1,
sa, socklen);
if (parcEventSocket->listener == NULL) {
parcLog_Error(parcEventScheduler_GetLogger(eventScheduler),
"Libevent evconnlistener_new_bind error (%d): %s",
errno, strerror(errno));
parcEventSocket_Destroy(&parcEventSocket);
return NULL;
}
if (errorCallback) {
evconnlistener_set_error_cb(parcEventSocket->listener, _parc_evconn_error_callback);
}
parcEventSocket_LogDebug(parcEventSocket,
"parcEventSocket_Create(cb=%p,args=%p) = %p\n",
callback, userData, parcEventSocket);
return parcEventSocket;
}
void
parcEventSocket_Destroy(PARCEventSocket **socketEvent)
{
assertNotNull(*socketEvent, "parcEventSocket_Destroy must be passed a valid socketEvent!");
if ((*socketEvent)->listener) {
evconnlistener_free((*socketEvent)->listener);
}
parcEventSocket_LogDebug((*socketEvent), "parcEventSocket_Destroy(%p)\n", *socketEvent);
parcMemory_Deallocate((void **) socketEvent);
}
void
parcEventSocket_EnableDebug(void)
{
_parc_event_socket_debug_enabled = 1;
}
void
parcEventSocket_DisableDebug(void)
{
_parc_event_socket_debug_enabled = 0;
}
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