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/* $Id: proxy_pollmgr.h $ */
/** @file
* NAT Network - poll manager, definitions and declarations.
*/
/*
* Copyright (C) 2013-2022 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#ifndef VBOX_INCLUDED_SRC_NAT_proxy_pollmgr_h
#define VBOX_INCLUDED_SRC_NAT_proxy_pollmgr_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#ifndef RT_OS_WINDOWS
# include <unistd.h> /* for ssize_t */
#endif
#include "lwip/sys.h"
enum pollmgr_slot_t {
POLLMGR_CHAN_PXTCP_ADD, /* new proxy tcp connection from guest */
POLLMGR_CHAN_PXTCP_POLLIN, /* free space in ringbuf, may POLLIN */
POLLMGR_CHAN_PXTCP_POLLOUT, /* schedule one-shot POLLOUT callback */
POLLMGR_CHAN_PXTCP_DEL, /* delete pxtcp */
POLLMGR_CHAN_PXTCP_RESET, /* send RST and delete pxtcp */
POLLMGR_CHAN_PXUDP_ADD, /* new proxy udp conversation from guest */
POLLMGR_CHAN_PXUDP_DEL, /* delete pxudp from pollmgr */
POLLMGR_CHAN_PORTFWD, /* add/remove port forwarding rules */
POLLMGR_CHAN_COUNT
};
struct pollmgr_handler; /* forward */
typedef int (*pollmgr_callback)(struct pollmgr_handler *, SOCKET, int);
struct pollmgr_handler {
pollmgr_callback callback;
void *data;
int slot;
};
struct pollmgr_refptr {
struct pollmgr_handler *ptr;
sys_mutex_t lock;
size_t strong;
size_t weak;
};
int pollmgr_init(void);
/* static named slots (aka "channels") */
SOCKET pollmgr_add_chan(int, struct pollmgr_handler *);
ssize_t pollmgr_chan_send(int, void *buf, size_t nbytes);
void *pollmgr_chan_recv_ptr(struct pollmgr_handler *, SOCKET, int);
/* dynamic slots */
int pollmgr_add(struct pollmgr_handler *, SOCKET, int);
/* special-purpose strong/weak references */
struct pollmgr_refptr *pollmgr_refptr_create(struct pollmgr_handler *);
void pollmgr_refptr_weak_ref(struct pollmgr_refptr *);
struct pollmgr_handler *pollmgr_refptr_get(struct pollmgr_refptr *);
void pollmgr_refptr_unref(struct pollmgr_refptr *);
void pollmgr_update_events(int, int);
void pollmgr_del_slot(int);
void pollmgr_thread(void *);
/* buffer for callbacks to receive udp without worrying about truncation */
extern u8_t pollmgr_udpbuf[64 * 1024];
#endif /* !VBOX_INCLUDED_SRC_NAT_proxy_pollmgr_h */
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