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
|
/* $Id: VBoxNetIntIf.cpp $ */
/** @file
* VBoxNetIntIf - IntNet Interface Client Routines.
*/
/*
* Copyright (C) 2009-2023 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>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_DEFAULT
#include "VBoxNetLib.h"
#include <VBox/intnet.h>
#include <VBox/intnetinline.h>
#include <VBox/sup.h>
#include <VBox/vmm/vmm.h>
#include <iprt/errcore.h>
#include <VBox/log.h>
#include <iprt/string.h>
/**
* Flushes the send buffer.
*
* @returns VBox status code.
* @param pSession The support driver session.
* @param hIf The interface handle to flush.
*/
int VBoxNetIntIfFlush(PSUPDRVSESSION pSession, INTNETIFHANDLE hIf)
{
INTNETIFSENDREQ SendReq;
SendReq.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC;
SendReq.Hdr.cbReq = sizeof(SendReq);
SendReq.pSession = pSession;
SendReq.hIf = hIf;
return SUPR3CallVMMR0Ex(NIL_RTR0PTR, NIL_VMCPUID, VMMR0_DO_INTNET_IF_SEND, 0, &SendReq.Hdr);
}
/**
* Copys the SG segments into the specified fram.
*
* @param pvFrame The frame buffer.
* @param cSegs The number of segments.
* @param paSegs The segments.
*/
static void vboxnetIntIfCopySG(void *pvFrame, size_t cSegs, PCINTNETSEG paSegs)
{
uint8_t *pbDst = (uint8_t *)pvFrame;
for (size_t iSeg = 0; iSeg < cSegs; iSeg++)
{
memcpy(pbDst, paSegs[iSeg].pv, paSegs[iSeg].cb);
pbDst += paSegs[iSeg].cb;
}
}
/**
* Writes a frame packet to the buffer.
*
* @returns VBox status code.
* @param pBuf The buffer.
* @param pRingBuf The ring buffer to read from.
* @param cSegs The number of segments.
* @param paSegs The segments.
*/
int VBoxNetIntIfRingWriteFrame(PINTNETBUF pBuf, PINTNETRINGBUF pRingBuf, size_t cSegs, PCINTNETSEG paSegs)
{
RT_NOREF(pBuf);
/*
* Validate input.
*/
AssertPtr(pBuf);
AssertPtr(pRingBuf);
AssertPtr(paSegs);
Assert(cSegs > 0);
/*
* Calc frame size.
*/
uint32_t cbFrame = 0;
for (size_t iSeg = 0; iSeg < cSegs; iSeg++)
cbFrame += paSegs[iSeg].cb;
Assert(cbFrame >= sizeof(RTMAC) * 2);
/*
* Allocate a frame, copy the data and commit it.
*/
PINTNETHDR pHdr = NULL;
void *pvFrame = NULL;
int rc = IntNetRingAllocateFrame(pRingBuf, cbFrame, &pHdr, &pvFrame);
if (RT_SUCCESS(rc))
{
vboxnetIntIfCopySG(pvFrame, cSegs, paSegs);
IntNetRingCommitFrame(pRingBuf, pHdr);
return VINF_SUCCESS;
}
return rc;
}
/**
* Sends a frame
*
* @returns VBox status code.
* @param pSession The support driver session.
* @param hIf The interface handle.
* @param pBuf The interface buffer.
* @param cSegs The number of segments.
* @param paSegs The segments.
* @param fFlush Whether to flush the write.
*/
int VBoxNetIntIfSend(PSUPDRVSESSION pSession, INTNETIFHANDLE hIf, PINTNETBUF pBuf,
size_t cSegs, PCINTNETSEG paSegs, bool fFlush)
{
int rc = VBoxNetIntIfRingWriteFrame(pBuf, &pBuf->Send, cSegs, paSegs);
if (rc == VERR_BUFFER_OVERFLOW)
{
VBoxNetIntIfFlush(pSession, hIf);
rc = VBoxNetIntIfRingWriteFrame(pBuf, &pBuf->Send, cSegs, paSegs);
}
if (RT_SUCCESS(rc) && fFlush)
rc = VBoxNetIntIfFlush(pSession, hIf);
return rc;
}
|
