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/* $Id: VBoxPktDmp.h $ */
/** @file
* VBoxPktDmp.h - Dump Ethernet frame into debug log.
*/
/*
* Copyright (C) 2016-2022 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>.
*
* 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 VBOX_INCLUDED_VBoxPktDmp_h
#define VBOX_INCLUDED_VBoxPktDmp_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <iprt/net.h>
#include <iprt/log.h>
#if defined(LOG_ENABLED) && !defined(VBOX_DEVICE_STRUCT_TESTCASE)
# include <iprt/asm.h>
#endif
DECLINLINE(const char *) vboxEthTypeStr(uint16_t uType)
{
switch (uType)
{
case RTNET_ETHERTYPE_IPV4: return "IP";
case RTNET_ETHERTYPE_IPV6: return "IPv6";
case RTNET_ETHERTYPE_ARP: return "ARP";
}
return "unknown";
}
DECLINLINE(void) vboxEthPacketDump(const char *pcszInstance, const char *pcszText, const uint8_t *pcPacket, uint32_t cb)
{
#if defined(LOG_ENABLED) && !defined(VBOX_DEVICE_STRUCT_TESTCASE)
AssertReturnVoid(cb >= 14);
const uint8_t *pHdr = pcPacket;
const uint8_t *pEnd = pcPacket + cb;
AssertReturnVoid(pEnd - pHdr >= 14);
uint16_t uEthType = RT_N2H_U16(*(uint16_t*)(pHdr+12));
Log2(("%s: %s (%d bytes), %RTmac => %RTmac, EthType=%s(0x%x)\n", pcszInstance,
pcszText, cb, pHdr+6, pHdr, vboxEthTypeStr(uEthType), uEthType));
pHdr += sizeof(RTNETETHERHDR);
if (uEthType == RTNET_ETHERTYPE_VLAN)
{
AssertReturnVoid(pEnd - pHdr >= 4);
uEthType = RT_N2H_U16(*(uint16_t*)(pHdr+2));
Log2((" + VLAN: id=%d EthType=%s(0x%x)\n", RT_N2H_U16(*(uint16_t*)(pHdr)) & 0xFFF,
vboxEthTypeStr(uEthType), uEthType));
pHdr += 2 * sizeof(uint16_t);
}
uint8_t uProto = 0xFF;
switch (uEthType)
{
case RTNET_ETHERTYPE_IPV6:
AssertReturnVoid(pEnd - pHdr >= 40);
uProto = pHdr[6];
Log2((" + IPv6: %RTnaipv6 => %RTnaipv6\n", pHdr+8, pHdr+24));
pHdr += 40;
break;
case RTNET_ETHERTYPE_IPV4:
AssertReturnVoid(pEnd - pHdr >= 20);
uProto = pHdr[9];
Log2((" + IP: %RTnaipv4 => %RTnaipv4\n", *(uint32_t*)(pHdr+12), *(uint32_t*)(pHdr+16)));
pHdr += (pHdr[0] & 0xF) * 4;
break;
case RTNET_ETHERTYPE_ARP:
AssertReturnVoid(pEnd - pHdr >= 28);
AssertReturnVoid(RT_N2H_U16(*(uint16_t*)(pHdr+2)) == RTNET_ETHERTYPE_IPV4);
switch (RT_N2H_U16(*(uint16_t*)(pHdr+6)))
{
case 1: /* ARP request */
Log2((" + ARP-REQ: who-has %RTnaipv4 tell %RTnaipv4\n",
*(uint32_t*)(pHdr+24), *(uint32_t*)(pHdr+14)));
break;
case 2: /* ARP reply */
Log2((" + ARP-RPL: %RTnaipv4 is-at %RTmac\n",
*(uint32_t*)(pHdr+14), pHdr+8));
break;
default:
Log2((" + ARP: unknown op %d\n", RT_N2H_U16(*(uint16_t*)(pHdr+6))));
break;
}
break;
/* There is no default case as uProto is initialized with 0xFF */
}
while (uProto != 0xFF)
{
switch (uProto)
{
case 0: /* IPv6 Hop-by-Hop option*/
case 60: /* IPv6 Destination option*/
case 43: /* IPv6 Routing option */
case 44: /* IPv6 Fragment option */
Log2((" + IPv6 option (%d): <not implemented>\n", uProto));
uProto = pHdr[0];
pHdr += pHdr[1] * 8 + 8; /* Skip to the next extension/protocol */
break;
case 51: /* IPv6 IPsec AH */
Log2((" + IPv6 IPsec AH: <not implemented>\n"));
uProto = pHdr[0];
pHdr += (pHdr[1] + 2) * 4; /* Skip to the next extension/protocol */
break;
case 50: /* IPv6 IPsec ESP */
/* Cannot decode IPsec, fall through */
Log2((" + IPv6 IPsec ESP: <not implemented>\n"));
uProto = 0xFF;
break;
case 59: /* No Next Header */
Log2((" + IPv6 No Next Header\n"));
uProto = 0xFF;
break;
case 58: /* IPv6-ICMP */
switch (pHdr[0])
{
case 1: Log2((" + IPv6-ICMP: destination unreachable, code %d\n", pHdr[1])); break;
case 128: Log2((" + IPv6-ICMP: echo request\n")); break;
case 129: Log2((" + IPv6-ICMP: echo reply\n")); break;
default: Log2((" + IPv6-ICMP: unknown type %d, code %d\n", pHdr[0], pHdr[1])); break;
}
uProto = 0xFF;
break;
case 1: /* ICMP */
switch (pHdr[0])
{
case 0: Log2((" + ICMP: echo reply\n")); break;
case 8: Log2((" + ICMP: echo request\n")); break;
case 3: Log2((" + ICMP: destination unreachable, code %d\n", pHdr[1])); break;
default: Log2((" + ICMP: unknown type %d, code %d\n", pHdr[0], pHdr[1])); break;
}
uProto = 0xFF;
break;
case 6: /* TCP */
Log2((" + TCP: src=%d dst=%d seq=%x ack=%x\n",
RT_N2H_U16(*(uint16_t*)(pHdr)), RT_N2H_U16(*(uint16_t*)(pHdr+2)),
RT_N2H_U32(*(uint32_t*)(pHdr+4)), RT_N2H_U32(*(uint32_t*)(pHdr+8))));
uProto = 0xFF;
break;
case 17: /* UDP */
Log2((" + UDP: src=%d dst=%d\n",
RT_N2H_U16(*(uint16_t*)(pHdr)), RT_N2H_U16(*(uint16_t*)(pHdr+2))));
uProto = 0xFF;
break;
default:
Log2((" + Unknown: proto=0x%x\n", uProto));
uProto = 0xFF;
break;
}
}
Log3(("%.*Rhxd\n", cb, pcPacket));
#else
RT_NOREF4(pcszInstance, pcszText, pcPacket, cb);
#endif
}
#endif /* !VBOX_INCLUDED_VBoxPktDmp_h */
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