1 | /* $Id: proxy_pollmgr.h 62481 2016-07-22 18:30:21Z 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) 2013-2016 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 _PROXY_POLLMGR_H_
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19 | #define _PROXY_POLLMGR_H_
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20 |
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21 | #ifndef RT_OS_WINDOWS
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22 | # include <unistd.h> /* for ssize_t */
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23 | #endif
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24 | #include "lwip/sys.h"
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25 |
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26 | enum pollmgr_slot_t {
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27 | POLLMGR_CHAN_PXTCP_ADD, /* new proxy tcp connection from guest */
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28 | POLLMGR_CHAN_PXTCP_POLLIN, /* free space in ringbuf, may POLLIN */
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29 | POLLMGR_CHAN_PXTCP_POLLOUT, /* schedule one-shot POLLOUT callback */
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30 | POLLMGR_CHAN_PXTCP_DEL, /* delete pxtcp */
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31 | POLLMGR_CHAN_PXTCP_RESET, /* send RST and delete pxtcp */
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32 |
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33 | POLLMGR_CHAN_PXUDP_ADD, /* new proxy udp conversation from guest */
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34 | POLLMGR_CHAN_PXUDP_DEL, /* delete pxudp from pollmgr */
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35 |
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36 | POLLMGR_CHAN_PORTFWD, /* add/remove port forwarding rules */
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37 |
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38 | POLLMGR_SLOT_STATIC_COUNT,
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39 | POLLMGR_SLOT_FIRST_DYNAMIC = POLLMGR_SLOT_STATIC_COUNT
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40 | };
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41 |
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42 |
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43 | struct pollmgr_handler; /* forward */
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44 | typedef int (*pollmgr_callback)(struct pollmgr_handler *, SOCKET, int);
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45 |
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46 | struct pollmgr_handler {
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47 | pollmgr_callback callback;
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48 | void *data;
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49 | int slot;
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50 | };
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51 |
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52 | struct pollmgr_refptr {
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53 | struct pollmgr_handler *ptr;
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54 | sys_mutex_t lock;
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55 | size_t strong;
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56 | size_t weak;
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57 | };
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58 |
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59 | int pollmgr_init(void);
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60 |
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61 | /* static named slots (aka "channels") */
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62 | SOCKET pollmgr_add_chan(int, struct pollmgr_handler *);
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63 | ssize_t pollmgr_chan_send(int, void *buf, size_t nbytes);
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64 | void *pollmgr_chan_recv_ptr(struct pollmgr_handler *, SOCKET, int);
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65 |
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66 | /* dynamic slots */
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67 | int pollmgr_add(struct pollmgr_handler *, SOCKET, int);
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68 |
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69 | /* special-purpose strong/weak references */
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70 | struct pollmgr_refptr *pollmgr_refptr_create(struct pollmgr_handler *);
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71 | void pollmgr_refptr_weak_ref(struct pollmgr_refptr *);
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72 | struct pollmgr_handler *pollmgr_refptr_get(struct pollmgr_refptr *);
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73 | void pollmgr_refptr_unref(struct pollmgr_refptr *);
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74 |
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75 | void pollmgr_update_events(int, int);
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76 | void pollmgr_del_slot(int);
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77 |
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78 | void pollmgr_thread(void *);
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79 |
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80 | /* buffer for callbacks to receive udp without worrying about truncation */
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81 | extern u8_t pollmgr_udpbuf[64 * 1024];
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82 |
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83 | #endif /* _PROXY_POLLMGR_H_ */
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