| 1 | /* $Id: proxy_pollmgr.h 93115 2022-01-01 11:31:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * NAT Network - poll manager, definitions and declarations.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2013-2022 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 | #ifndef VBOX_INCLUDED_SRC_NAT_proxy_pollmgr_h
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| 19 | #define VBOX_INCLUDED_SRC_NAT_proxy_pollmgr_h
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| 20 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 21 | # pragma once
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| 22 | #endif
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| 23 |
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| 24 | #ifndef RT_OS_WINDOWS
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| 25 | # include <unistd.h> /* for ssize_t */
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| 26 | #endif
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| 27 | #include "lwip/sys.h"
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| 28 |
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| 29 | enum pollmgr_slot_t {
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| 30 | POLLMGR_CHAN_PXTCP_ADD, /* new proxy tcp connection from guest */
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| 31 | POLLMGR_CHAN_PXTCP_POLLIN, /* free space in ringbuf, may POLLIN */
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| 32 | POLLMGR_CHAN_PXTCP_POLLOUT, /* schedule one-shot POLLOUT callback */
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| 33 | POLLMGR_CHAN_PXTCP_DEL, /* delete pxtcp */
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| 34 | POLLMGR_CHAN_PXTCP_RESET, /* send RST and delete pxtcp */
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| 35 |
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| 36 | POLLMGR_CHAN_PXUDP_ADD, /* new proxy udp conversation from guest */
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| 37 | POLLMGR_CHAN_PXUDP_DEL, /* delete pxudp from pollmgr */
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| 38 |
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| 39 | POLLMGR_CHAN_PORTFWD, /* add/remove port forwarding rules */
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| 40 |
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| 41 | POLLMGR_CHAN_COUNT
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| 42 | };
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| 43 |
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| 44 |
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| 45 | struct pollmgr_handler; /* forward */
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| 46 | typedef int (*pollmgr_callback)(struct pollmgr_handler *, SOCKET, int);
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| 47 |
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| 48 | struct pollmgr_handler {
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| 49 | pollmgr_callback callback;
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| 50 | void *data;
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| 51 | int slot;
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| 52 | };
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| 53 |
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| 54 | struct pollmgr_refptr {
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| 55 | struct pollmgr_handler *ptr;
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| 56 | sys_mutex_t lock;
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| 57 | size_t strong;
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| 58 | size_t weak;
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| 59 | };
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| 60 |
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| 61 | int pollmgr_init(void);
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| 62 |
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| 63 | /* static named slots (aka "channels") */
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| 64 | SOCKET pollmgr_add_chan(int, struct pollmgr_handler *);
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| 65 | ssize_t pollmgr_chan_send(int, void *buf, size_t nbytes);
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| 66 | void *pollmgr_chan_recv_ptr(struct pollmgr_handler *, SOCKET, int);
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| 67 |
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| 68 | /* dynamic slots */
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| 69 | int pollmgr_add(struct pollmgr_handler *, SOCKET, int);
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| 70 |
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| 71 | /* special-purpose strong/weak references */
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| 72 | struct pollmgr_refptr *pollmgr_refptr_create(struct pollmgr_handler *);
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| 73 | void pollmgr_refptr_weak_ref(struct pollmgr_refptr *);
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| 74 | struct pollmgr_handler *pollmgr_refptr_get(struct pollmgr_refptr *);
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| 75 | void pollmgr_refptr_unref(struct pollmgr_refptr *);
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| 76 |
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| 77 | void pollmgr_update_events(int, int);
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| 78 | void pollmgr_del_slot(int);
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| 79 |
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| 80 | void pollmgr_thread(void *);
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| 81 |
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| 82 | /* buffer for callbacks to receive udp without worrying about truncation */
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| 83 | extern u8_t pollmgr_udpbuf[64 * 1024];
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| 84 |
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| 85 | #endif /* !VBOX_INCLUDED_SRC_NAT_proxy_pollmgr_h */
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