summaryrefslogtreecommitdiffstats
path: root/include/iprt/udp.h
blob: f92a2f205f88a9aa552db20a2038a736940ac79f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
/** @file
 * IPRT - UDP/IP.
 */

/*
 * Copyright (C) 2006-2023 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>.
 *
 * The contents of this file may alternatively be used under the terms
 * of the Common Development and Distribution License Version 1.0
 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
 * in the VirtualBox distribution, in which case the provisions of the
 * CDDL are applicable instead of those of the GPL.
 *
 * You may elect to license modified versions of this file under the
 * terms and conditions of either the GPL or the CDDL or both.
 *
 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
 */

#ifndef IPRT_INCLUDED_udp_h
#define IPRT_INCLUDED_udp_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif

#include <iprt/cdefs.h>
#include <iprt/types.h>
#include <iprt/thread.h>
#include <iprt/net.h>
#include <iprt/sg.h>
#include <iprt/socket.h>

#ifdef IN_RING0
# error "There are no RTFile APIs available Ring-0 Host Context!"
#endif


RT_C_DECLS_BEGIN

/** @defgroup grp_rt_udp    RTUdp - UDP/IP
 * @ingroup grp_rt
 * @{
 */


/**
 * Handle incoming UDP datagrams.
 *
 * @returns iprt status code.
 * @returns VERR_UDP_SERVER_STOP to terminate the server loop forcing
 *          the RTUdpCreateServer() call to return.
 * @param   Sock        The socket on which the datagram needs to be received.
 * @param   pvUser      User argument.
 */
typedef DECLCALLBACKTYPE(int, FNRTUDPSERVE,(RTSOCKET Sock, void *pvUser));
/** Pointer to a RTUDPSERVE(). */
typedef FNRTUDPSERVE *PFNRTUDPSERVE;

/**
 * Create single datagram at a time UDP Server in a separate thread.
 *
 * The thread will loop accepting datagrams and call pfnServe for
 * each of the incoming datagrams in turn. The pfnServe function can
 * return VERR_UDP_SERVER_STOP too terminate this loop. RTUdpServerDestroy()
 * should be used to terminate the server.
 *
 * @returns iprt status code.
 * @param   pszAddress      The address for creating a datagram socket.
 *                          If NULL or empty string the server is bound to all interfaces.
 * @param   uPort           The port for creating a datagram socket.
 * @param   enmType         The thread type.
 * @param   pszThrdName     The name of the worker thread.
 * @param   pfnServe        The function which will handle incoming datagrams.
 * @param   pvUser          User argument passed to pfnServe.
 * @param   ppServer        Where to store the serverhandle.
 */
RTR3DECL(int)  RTUdpServerCreate(const char *pszAddress, unsigned uPort, RTTHREADTYPE enmType, const char *pszThrdName,
                                 PFNRTUDPSERVE pfnServe, void *pvUser, PPRTUDPSERVER ppServer);

/**
 * Create single datagram at a time UDP Server.
 * The caller must call RTUdpServerReceive() to actually start the server.
 *
 * @returns iprt status code.
 * @param   pszAddress      The address for creating a datagram socket.
 *                          If NULL the server is bound to all interfaces.
 * @param   uPort           The port for creating a datagram socket.
 * @param   ppServer        Where to store the serverhandle.
 */
RTR3DECL(int) RTUdpServerCreateEx(const char *pszAddress, uint32_t uPort, PPRTUDPSERVER ppServer);

/**
 * Shuts down the server.
 *
 * @returns IPRT status code.
 * @param   pServer         Handle to the server.
 */
RTR3DECL(int) RTUdpServerShutdown(PRTUDPSERVER pServer);

/**
 * Closes down and frees a UDP Server.
 *
 * @returns iprt status code.
 * @param   pServer         Handle to the server.
 */
RTR3DECL(int) RTUdpServerDestroy(PRTUDPSERVER pServer);

/**
 * Listen for incoming datagrams.
 *
 * The function will loop waiting for datagrams and call pfnServe for
 * each of the incoming datagrams in turn. The pfnServe function can
 * return VERR_UDP_SERVER_STOP too terminate this loop. A stopped server
 * can only be destroyed.
 *
 * @returns iprt status code.
 * @param   pServer         The server handle as returned from RTUdpServerCreateEx().
 * @param   pfnServe        The function which will handle incoming datagrams.
 * @param   pvUser          User argument passed to pfnServe.
 */
RTR3DECL(int) RTUdpServerListen(PRTUDPSERVER pServer, PFNRTUDPSERVE pfnServe, void *pvUser);

/**
 * Receive data from a socket.
 *
 * @returns iprt status code.
 * @param   Sock        Socket descriptor.
 * @param   pvBuffer    Where to put the data we read.
 * @param   cbBuffer    Read buffer size.
 * @param   pcbRead     Number of bytes read. Must be non-NULL.
 * @param   pSrcAddr    The network address to read from.
 */
RTR3DECL(int)  RTUdpRead(RTSOCKET Sock, void *pvBuffer, size_t cbBuffer, size_t *pcbRead, PRTNETADDR pSrcAddr);

/**
 * Send data to a socket.
 *
 * @returns iprt status code.
 * @retval  VERR_INTERRUPTED if interrupted before anything was written.
 *
 * @param   pServer     Handle to the server.
 * @param   pvBuffer    Buffer to write data to socket.
 * @param   cbBuffer    How much to write.
 * @param   pDstAddr    Destination address.
 */
RTR3DECL(int)  RTUdpWrite(PRTUDPSERVER pServer, const void *pvBuffer,
                          size_t cbBuffer, PCRTNETADDR pDstAddr);

/**
 * Create and connect a data socket.
 *
 * @returns iprt status code.
 * @param   pszAddress          The address to connect to.
 * @param   uPort               The port to connect to.
 * @param   pLocalAddr          The local address to bind this socket to, can be
 *                              NULL.
 * @param   pSock               Where to store the handle to the established connection.
 */
RTR3DECL(int) RTUdpCreateClientSocket(const char *pszAddress, uint32_t uPort, PRTNETADDR pLocalAddr, PRTSOCKET pSock);

/**
 * Create a data socket acting as a server.
 *
 * @returns iprt status code.
 * @param   pszAddress          The address to connect to.
 * @param   uPort               The port to connect to.
 * @param   pSock               Where to store the handle to the established connection.
 */
RTR3DECL(int) RTUdpCreateServerSocket(const char *pszAddress, uint32_t uPort, PRTSOCKET pSock);

/** @} */
RT_C_DECLS_END

#endif /* !IPRT_INCLUDED_udp_h */