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Uthernet II: implement IPRAW sockets. (PR #1069)

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Andrea 2022-03-22 19:30:42 +00:00 committed by GitHub
parent 2d4f60452f
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10 changed files with 457 additions and 44 deletions
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14
AppleWinExpress2019.vcxproj
View File

@ -114,6 +114,7 @@
<ClInclude Include="source\StrFormat.h" />
<ClInclude Include="source\SynchronousEventManager.h" />
<ClInclude Include="source\Tape.h" />
<ClInclude Include="source\Tfe\IPRaw.h" />
<ClInclude Include="source\Tfe\NetworkBackend.h" />
<ClInclude Include="source\Tfe\Bpf.h" />
<ClInclude Include="source\Tfe\Ip6_misc.h" />
@ -222,6 +223,7 @@
<ClCompile Include="source\StrFormat.cpp" />
<ClCompile Include="source\SynchronousEventManager.cpp" />
<ClCompile Include="source\Tape.cpp" />
<ClCompile Include="source\Tfe\IPRaw.cpp" />
<ClCompile Include="source\Tfe\NetworkBackend.cpp" />
<ClCompile Include="source\Tfe\PCapBackend.cpp" />
<ClCompile Include="source\Tfe\tfearch.cpp">
@ -467,7 +469,7 @@
<Link>
<SubSystem>Windows</SubSystem>
<GenerateDebugInformation>true</GenerateDebugInformation>
<AdditionalDependencies>htmlhelp.lib;comctl32.lib;winmm.lib;dsound.lib;dxguid.lib;version.lib;strmiids.lib;dinput8.lib;user32.lib;gdi32.lib;advapi32.lib;shell32.lib;comdlg32.lib;ole32.lib;wsock32.lib;shlwapi.lib;ddraw.lib;%(AdditionalDependencies)</AdditionalDependencies>
<AdditionalDependencies>iphlpapi.lib;htmlhelp.lib;comctl32.lib;winmm.lib;dsound.lib;dxguid.lib;version.lib;strmiids.lib;dinput8.lib;user32.lib;gdi32.lib;advapi32.lib;shell32.lib;comdlg32.lib;ole32.lib;wsock32.lib;shlwapi.lib;ddraw.lib;%(AdditionalDependencies)</AdditionalDependencies>
<AdditionalManifestDependencies>"type='Win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'"</AdditionalManifestDependencies>
<MinimumRequiredVersion>5.01</MinimumRequiredVersion>
</Link>
@ -495,7 +497,7 @@
<Link>
<SubSystem>Windows</SubSystem>
<GenerateDebugInformation>true</GenerateDebugInformation>
<AdditionalDependencies>htmlhelp.lib;comctl32.lib;winmm.lib;dsound.lib;ddraw_lib\x86\dxguid.lib;version.lib;strmiids.lib;dinput8.lib;user32.lib;gdi32.lib;advapi32.lib;shell32.lib;comdlg32.lib;ole32.lib;wsock32.lib;shlwapi.lib;ddraw_lib\x86\ddraw.lib;%(AdditionalDependencies)</AdditionalDependencies>
<AdditionalDependencies>iphlpapi.lib;htmlhelp.lib;comctl32.lib;winmm.lib;dsound.lib;ddraw_lib\x86\dxguid.lib;version.lib;strmiids.lib;dinput8.lib;user32.lib;gdi32.lib;advapi32.lib;shell32.lib;comdlg32.lib;ole32.lib;wsock32.lib;shlwapi.lib;ddraw_lib\x86\ddraw.lib;%(AdditionalDependencies)</AdditionalDependencies>
<AdditionalManifestDependencies>"type='Win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'"</AdditionalManifestDependencies>
<MinimumRequiredVersion>5.01</MinimumRequiredVersion>
</Link>
@ -522,7 +524,7 @@
<Link>
<SubSystem>Windows</SubSystem>
<GenerateDebugInformation>true</GenerateDebugInformation>
<AdditionalDependencies>htmlhelp.lib;comctl32.lib;winmm.lib;dsound.lib;dxguid.lib;version.lib;strmiids.lib;dinput8.lib;user32.lib;gdi32.lib;advapi32.lib;shell32.lib;comdlg32.lib;ole32.lib;wsock32.lib;shlwapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
<AdditionalDependencies>iphlpapi.lib;htmlhelp.lib;comctl32.lib;winmm.lib;dsound.lib;dxguid.lib;version.lib;strmiids.lib;dinput8.lib;user32.lib;gdi32.lib;advapi32.lib;shell32.lib;comdlg32.lib;ole32.lib;wsock32.lib;shlwapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
<AdditionalManifestDependencies>"type='Win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'"</AdditionalManifestDependencies>
<MinimumRequiredVersion>5.01</MinimumRequiredVersion>
</Link>
@ -553,7 +555,7 @@
<GenerateDebugInformation>true</GenerateDebugInformation>
<EnableCOMDATFolding>true</EnableCOMDATFolding>
<OptimizeReferences>true</OptimizeReferences>
<AdditionalDependencies>htmlhelp.lib;comctl32.lib;winmm.lib;dsound.lib;dxguid.lib;version.lib;strmiids.lib;dinput8.lib;user32.lib;gdi32.lib;advapi32.lib;shell32.lib;comdlg32.lib;ole32.lib;wsock32.lib;shlwapi.lib;ddraw.lib;%(AdditionalDependencies)</AdditionalDependencies>
<AdditionalDependencies>iphlpapi.lib;htmlhelp.lib;comctl32.lib;winmm.lib;dsound.lib;dxguid.lib;version.lib;strmiids.lib;dinput8.lib;user32.lib;gdi32.lib;advapi32.lib;shell32.lib;comdlg32.lib;ole32.lib;wsock32.lib;shlwapi.lib;ddraw.lib;%(AdditionalDependencies)</AdditionalDependencies>
<LinkTimeCodeGeneration>UseLinkTimeCodeGeneration</LinkTimeCodeGeneration>
<AdditionalManifestDependencies>"type='Win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'"</AdditionalManifestDependencies>
<MinimumRequiredVersion>5.01</MinimumRequiredVersion>
@ -586,7 +588,7 @@
<GenerateDebugInformation>true</GenerateDebugInformation>
<EnableCOMDATFolding>true</EnableCOMDATFolding>
<OptimizeReferences>true</OptimizeReferences>
<AdditionalDependencies>htmlhelp.lib;comctl32.lib;winmm.lib;dsound.lib;ddraw_lib\x86\dxguid.lib;version.lib;strmiids.lib;dinput8.lib;user32.lib;gdi32.lib;advapi32.lib;shell32.lib;comdlg32.lib;ole32.lib;wsock32.lib;shlwapi.lib;ddraw_lib\x86\ddraw.lib;%(AdditionalDependencies)</AdditionalDependencies>
<AdditionalDependencies>iphlpapi.lib;htmlhelp.lib;comctl32.lib;winmm.lib;dsound.lib;ddraw_lib\x86\dxguid.lib;version.lib;strmiids.lib;dinput8.lib;user32.lib;gdi32.lib;advapi32.lib;shell32.lib;comdlg32.lib;ole32.lib;wsock32.lib;shlwapi.lib;ddraw_lib\x86\ddraw.lib;%(AdditionalDependencies)</AdditionalDependencies>
<LinkTimeCodeGeneration>UseLinkTimeCodeGeneration</LinkTimeCodeGeneration>
<AdditionalManifestDependencies>"type='Win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'"</AdditionalManifestDependencies>
<MinimumRequiredVersion>5.01</MinimumRequiredVersion>
@ -619,7 +621,7 @@
<GenerateDebugInformation>true</GenerateDebugInformation>
<EnableCOMDATFolding>true</EnableCOMDATFolding>
<OptimizeReferences>true</OptimizeReferences>
<AdditionalDependencies>htmlhelp.lib;comctl32.lib;winmm.lib;dsound.lib;dxguid.lib;version.lib;strmiids.lib;dinput8.lib;user32.lib;gdi32.lib;advapi32.lib;shell32.lib;comdlg32.lib;ole32.lib;wsock32.lib;shlwapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
<AdditionalDependencies>iphlpapi.lib;htmlhelp.lib;comctl32.lib;winmm.lib;dsound.lib;dxguid.lib;version.lib;strmiids.lib;dinput8.lib;user32.lib;gdi32.lib;advapi32.lib;shell32.lib;comdlg32.lib;ole32.lib;wsock32.lib;shlwapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
<LinkTimeCodeGeneration>UseLinkTimeCodeGeneration</LinkTimeCodeGeneration>
<AdditionalManifestDependencies>"type='Win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'"</AdditionalManifestDependencies>
<MinimumRequiredVersion>5.01</MinimumRequiredVersion>

6
AppleWinExpress2019.vcxproj.filters
View File

@ -259,6 +259,9 @@
<ClCompile Include="source\Uthernet2.cpp">
<Filter>Source Files\Uthernet</Filter>
</ClCompile>
<ClCompile Include="source\Tfe\IPRaw.cpp">
<Filter>Source Files\Uthernet</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<ClInclude Include="source\CommonVICE\6510core.h">
@ -594,6 +597,9 @@
<ClInclude Include="source\Uthernet2.h">
<Filter>Source Files\Uthernet</Filter>
</ClInclude>
<ClInclude Include="source\Tfe\IPRaw.h">
<Filter>Source Files\Uthernet</Filter>
</ClInclude>
</ItemGroup>
<ItemGroup>
<Image Include="resource\Applewin.bmp">

162
source/Tfe/IPRaw.cpp Normal file
View File

@ -0,0 +1,162 @@
/*
AppleWin : An Apple //e emulator for Windows
Copyright (C) 2022, Andrea Odetti
AppleWin 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; either version 2 of the License, or
(at your option) any later version.
AppleWin 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 AppleWin; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "StdAfx.h"
#include "IPRaw.h"
#ifndef _MSC_VER
#include <arpa/inet.h>
#endif
#define IPV4 0x04
namespace
{
#pragma pack(push)
#pragma pack(1) // Ensure struct is packed
struct IP4Header
{
uint8_t ihl : 4;
uint8_t version : 4;
uint8_t tos;
uint16_t len;
uint16_t id;
uint16_t flags : 3;
uint16_t fragmentOffset : 13;
uint8_t ttl;
uint8_t proto;
uint16_t checksum;
uint32_t sourceAddress;
uint32_t destinationAddress;
};
struct ETH2Frame
{
uint8_t destinationMac[6];
uint8_t sourceMac[6];
uint16_t type;
};
#pragma pack(pop)
uint32_t sum_every_16bits(const void *addr, int count)
{
uint32_t sum = 0;
const uint16_t *ptr = reinterpret_cast<const uint16_t *>(addr);
while (count > 1)
{
/* This is the inner loop */
sum += *ptr++;
count -= 2;
}
/* Add left-over byte, if any */
if (count > 0)
sum += *reinterpret_cast<const uint8_t *>(ptr);
return sum;
}
uint16_t checksum(const void *addr, int count)
{
/* Compute Internet Checksum for "count" bytes
* beginning at location "addr".
* Taken from https://tools.ietf.org/html/rfc1071
*/
uint32_t sum = sum_every_16bits(addr, count);
/* Fold 32-bit sum to 16 bits */
while (sum >> 16)
sum = (sum & 0xffff) + (sum >> 16);
return ~sum;
}
// get the minimum size of a ETH Frame that contains a IP payload
// 34 = 14 bytes for ETH2 + 20 bytes IPv4 (minimum)
int getIPMinimumSize()
{
const int minimumSize = sizeof(ETH2Frame) + sizeof(IP4Header) + 0; // 0 len
return minimumSize;
}
}
std::vector<uint8_t> createETH2Frame(const std::vector<uint8_t> &data,
const MACAddress *sourceMac, const MACAddress *destinationMac,
const uint8_t ttl, const uint8_t tos, const uint8_t protocol,
const uint32_t sourceAddress, const uint32_t destinationAddress)
{
const size_t total = sizeof(ETH2Frame) + sizeof(IP4Header) + data.size();
std::vector<uint8_t> frame(total);
ETH2Frame *eth2frame = reinterpret_cast<ETH2Frame *>(frame.data() + 0);
memcpy(eth2frame->destinationMac, destinationMac, sizeof(eth2frame->destinationMac));
memcpy(eth2frame->sourceMac, sourceMac, sizeof(eth2frame->destinationMac));
eth2frame->type = htons(0x0800);
IP4Header *ip4header = reinterpret_cast<IP4Header *>(frame.data() + sizeof(ETH2Frame));
ip4header->version = IPV4;
ip4header->ihl = 0x05; // minimum size = 20 bytes, without any extra option
ip4header->tos = tos;
ip4header->len = htons(static_cast<uint16_t>(sizeof(IP4Header) + data.size()));
ip4header->id = 0;
ip4header->fragmentOffset = 0;
ip4header->ttl = ttl;
ip4header->proto = protocol;
ip4header->sourceAddress = sourceAddress;
ip4header->destinationAddress = destinationAddress;
ip4header->checksum = checksum(ip4header, sizeof(IP4Header));
memcpy(frame.data() + sizeof(ETH2Frame) + sizeof(IP4Header), data.data(), data.size());
return frame;
}
void getIPPayload(const int lengthOfFrame, const uint8_t *frame,
size_t &lengthOfPayload, const uint8_t *&payload, uint32_t &destination, uint8_t &protocol)
{
const int minimumSize = getIPMinimumSize();
if (lengthOfFrame > minimumSize)
{
const ETH2Frame *eth2Frame = reinterpret_cast<const ETH2Frame *>(frame);
const IP4Header *ip4header = reinterpret_cast<const IP4Header *>(frame + sizeof(ETH2Frame));
if (eth2Frame->type == htons(0x0800) && ip4header->version == IPV4)
{
const uint16_t ipv4HeaderSize = ip4header->ihl * 4;
const uint16_t ipPacketSize = ntohs(ip4header->len);
const int expectedSize = sizeof(ETH2Frame) + ipPacketSize;
if (ipPacketSize > ipv4HeaderSize && lengthOfFrame >= expectedSize)
{
protocol = ip4header->proto;
payload = frame + sizeof(ETH2Frame) + ipv4HeaderSize;
lengthOfPayload = ipPacketSize - ipv4HeaderSize;
destination = ip4header->destinationAddress;
return;
}
}
}
// not a good packet
protocol = 0xFF; // reserved protocol
payload = nullptr;
lengthOfPayload = 0;
destination = 0;
}

11
source/Tfe/IPRaw.h Normal file
View File

@ -0,0 +1,11 @@
#pragma once
struct MACAddress;
std::vector<uint8_t> createETH2Frame(const std::vector<uint8_t> &data,
const MACAddress *sourceMac, const MACAddress *destinationMac,
const uint8_t ttl, const uint8_t tos, const uint8_t protocol,
const uint32_t sourceAddress, const uint32_t destinationAddress);
void getIPPayload(const int lengthOfFrame, const uint8_t *frame,
size_t &lengthOfPayload, const uint8_t *&payload, uint32_t &destination, uint8_t &protocol);

11
source/Tfe/NetworkBackend.h
View File

@ -6,6 +6,14 @@
#define MAX_RXLENGTH 1518
#define MIN_RXLENGTH 64
#pragma pack(push)
#pragma pack(1) // Ensure struct is packed
struct MACAddress
{
uint8_t address[6];
};
#pragma pack(pop)
class NetworkBackend
{
public:
@ -26,6 +34,9 @@ public:
// process pending packets
virtual void update(const ULONG nExecutedCycles) = 0;
// get MAC for IPRAW (it is only supposed to handle addresses on the local network)
virtual void getMACAddress(const uint32_t address, MACAddress & mac) = 0;
// if the backend is usable
virtual bool isValid() = 0;
};

14
source/Tfe/PCapBackend.cpp
View File

@ -25,6 +25,10 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#include "../Common.h"
#include "../Registry.h"
#ifdef _MSC_VER
#include <iphlpapi.h>
#endif
std::string PCapBackend::tfe_interface;
PCapBackend::PCapBackend(const std::string & pcapInterface)
@ -71,6 +75,16 @@ void PCapBackend::update(const ULONG /* nExecutedCycles */)
// nothing to do
}
void PCapBackend::getMACAddress(const uint32_t address, MACAddress & mac)
{
// this is only expected to be called for IP addresses on the same network
#ifdef _MSC_VER
const DWORD dwSourceAddress = INADDR_ANY;
ULONG len = sizeof(MACAddress::address);
SendARP(address, dwSourceAddress, mac.address, &len);
#endif
}
int PCapBackend::tfe_enumadapter_open(void)
{
return tfe_arch_enumadapter_open();

3
source/Tfe/PCapBackend.h
View File

@ -29,6 +29,9 @@ public:
// process pending packets
virtual bool isValid();
// get MAC for IPRAW (it is only supposed to handle addresses on the local network)
virtual void getMACAddress(const uint32_t address, MACAddress & mac);
static void tfe_SetRegistryInterface(UINT slot, const std::string& name);
static void get_disabled_state(int * param);

253
source/Uthernet2.cpp
View File

@ -24,6 +24,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#include "Interface.h"
#include "Tfe/NetworkBackend.h"
#include "Tfe/PCapBackend.h"
#include "Tfe/IPRaw.h"
#include "W5100.h"
// Linux uses EINPROGRESS while Windows returns WSAEWOULDBLOCK
@ -73,6 +74,9 @@ typedef int socklen_t;
#define SOCK_NONBLOCK O_NONBLOCK
#endif
// Dest MAC + Source MAC + Ether Type
#define ETH_MINIMUM_SIZE (6 + 6 + 2)
// #define U2_LOG_VERBOSE
// #define U2_LOG_TRAFFIC
// #define U2_LOG_STATE
@ -95,6 +99,12 @@ namespace
return host;
}
uint32_t readAddress(const uint8_t *ptr)
{
const uint32_t address = *reinterpret_cast<const uint32_t *>(ptr);
return address;
}
uint8_t getIByte(const uint16_t value, const size_t shift)
{
return (value >> shift) & 0xFF;
@ -141,6 +151,13 @@ namespace
writeData(socket, memory, data, len);
}
void writeDataIPRaw(Socket &socket, std::vector<uint8_t> &memory, const uint8_t *data, const size_t len, const uint32_t destination)
{
writeAny(socket, memory, destination);
write16(socket, memory, static_cast<uint16_t>(len));
writeData(socket, memory, data, len);
}
void writeDataForProtocol(Socket &socket, std::vector<uint8_t> &memory, const uint8_t *data, const size_t len, const sockaddr_in &source)
{
if (socket.sn_sr == W5100_SN_SR_SOCK_UDP)
@ -266,12 +283,18 @@ bool Socket::LoadSnapshot(YamlLoadHelper &yamlLoadHelper)
// transmit and receive sizes are restored from the card common registers
if (sn_sr != W5100_SN_SR_SOCK_MACRAW)
switch (sn_sr)
{
case W5100_SN_SR_SOCK_MACRAW:
case W5100_SN_SR_SOCK_IPRAW:
// we can restore RAW sockets
break;
default:
// no point in restoring a broken UDP or TCP connection
// just reset the socket
sn_sr = W5100_SN_SR_CLOSED;
// for the same reason there is no point in saving myFD and myErrno
break;
}
return true;
@ -434,7 +457,7 @@ void Uthernet2::updateRSR(const size_t i)
socket.sn_rx_rsr = dataPresent;
}
int Uthernet2::receiveForMacAddress(const bool acceptAll, const int size, uint8_t * data)
int Uthernet2::receiveForMacAddress(const bool acceptAll, const int size, uint8_t * data, PacketDestination & packetDestination)
{
const uint8_t * mac = myMemory.data() + W5100_SHAR0;
@ -442,15 +465,9 @@ int Uthernet2::receiveForMacAddress(const bool acceptAll, const int size, uint8_
int len;
while ((len = myNetworkBackend->receive(size, data)) > 0)
{
// minimum valid Ethernet frame is actually 64 bytes
// 12 is the minimum to ensure valid MAC Address logging later
if (len >= 12)
// smaller frames are not good anyway
if (len >= ETH_MINIMUM_SIZE)
{
if (acceptAll)
{
return len;
}
if (data[0] == mac[0] &&
data[1] == mac[1] &&
data[2] == mac[2] &&
@ -458,6 +475,7 @@ int Uthernet2::receiveForMacAddress(const bool acceptAll, const int size, uint8_
data[4] == mac[4] &&
data[5] == mac[5])
{
packetDestination = HOST;
return len;
}
@ -468,8 +486,16 @@ int Uthernet2::receiveForMacAddress(const bool acceptAll, const int size, uint8_
data[4] == 0xFF &&
data[5] == 0xFF)
{
packetDestination = BROADCAST;
return len;
}
if (acceptAll)
{
packetDestination = OTHER;
return len;
}
}
// skip this frame and try with another one
}
@ -477,34 +503,110 @@ int Uthernet2::receiveForMacAddress(const bool acceptAll, const int size, uint8_
return len;
}
void Uthernet2::receiveOnePacketMacRaw(const size_t i)
void Uthernet2::receiveOnePacketRaw()
{
bool acceptAll = false;
int macRawSocket = -1; // to which IPRaw soccket to send to (can only be 0)
Socket & socket0 = mySockets[0];
if (socket0.sn_sr == W5100_SN_SR_SOCK_MACRAW)
{
macRawSocket = 0; // the only MAC Raw socket is open, packet will go there as a fallback
const uint8_t mr = myMemory[socket0.registerAddress + W5100_SN_MR];
// see if MAC RAW filters or not
const bool filterMAC = mr & W5100_SN_MR_MF;
if (!filterMAC)
{
acceptAll = true;
}
}
uint8_t buffer[MAX_RXLENGTH];
PacketDestination packetDestination;
const int len = receiveForMacAddress(acceptAll, sizeof(buffer), buffer, packetDestination);
if (len > 0)
{
const uint8_t * payload;
size_t lengthOfPayload;
uint32_t destination;
uint8_t packetProtocol;
getIPPayload(len, buffer, lengthOfPayload, payload, destination, packetProtocol);
// see if there is a IPRAW socket that should accept thi spacket
int ipRawSocket = -1;
if (packetDestination != OTHER) // IPRaw always filters (HOST or BROADCAST, never OTHER)
{
for (size_t i = 0; i < mySockets.size(); ++i)
{
Socket & socket = mySockets[i];
if (socket.sn_sr == W5100_SN_SR_SOCK_IPRAW)
{
// IP only accepts by protocol & always filters MAC
const uint8_t socketProtocol = myMemory[socket.registerAddress + W5100_SN_PROTO];
if (payload && packetProtocol == socketProtocol)
{
ipRawSocket = i;
break; // a valid IPRAW socket has been found
}
}
// we should probably check for UDP & TCP sockets and filter these packets too
}
}
// priority to IPRAW
if (ipRawSocket >= 0)
{
receiveOnePacketIPRaw(ipRawSocket, lengthOfPayload, payload, destination, packetProtocol, len);
}
// fallback to MACRAW (if open)
else if (macRawSocket >= 0)
{
receiveOnePacketMacRaw(macRawSocket, len, buffer);
}
// else packet is dropped
}
}
void Uthernet2::receiveOnePacketMacRaw(const size_t i, const int size, uint8_t * data)
{
Socket &socket = mySockets[i];
uint8_t buffer[MAX_RXLENGTH];
const uint8_t mr = myMemory[socket.registerAddress + W5100_SN_MR];
const bool filterMAC = mr & W5100_SN_MR_MF;
const int len = receiveForMacAddress(!filterMAC, sizeof(buffer), buffer);
if (len > 0)
if (socket.isThereRoomFor(size, sizeof(uint16_t)))
{
// we know the packet is at least 12 bytes, and logging is ok
if (socket.isThereRoomFor(len, sizeof(uint16_t)))
{
writeDataMacRaw(socket, myMemory, buffer, len);
writeDataMacRaw(socket, myMemory, data, size);
#ifdef U2_LOG_TRAFFIC
LogFileOutput("U2: Read MACRAW[%" SIZE_T_FMT "]: " MAC_FMT " -> " MAC_FMT ": +%d -> %d bytes\n", i, MAC_SOURCE(buffer), MAC_DEST(buffer),
len, socket.sn_rx_rsr);
LogFileOutput("U2: Read MACRAW[%" SIZE_T_FMT "]: " MAC_FMT " -> " MAC_FMT ": +%d -> %d bytes\n", i, MAC_SOURCE(data), MAC_DEST(data),
size, socket.sn_rx_rsr);
#endif
}
else
{
// drop it
}
else
{
// drop it
#ifdef U2_LOG_TRAFFIC
LogFileOutput("U2: Skip MACRAW[%" SIZE_T_FMT "]: %d bytes\n", i, len);
LogFileOutput("U2: Skip MACRAW[%" SIZE_T_FMT "]: %d bytes\n", i, size);
#endif
}
}
void Uthernet2::receiveOnePacketIPRaw(const size_t i, const size_t lengthOfPayload, const uint8_t * payload, const uint32_t destination, const uint8_t protocol, const int len)
{
Socket &socket = mySockets[i];
if (socket.isThereRoomFor(lengthOfPayload, 4 + sizeof(uint16_t)))
{
writeDataIPRaw(socket, myMemory, payload, lengthOfPayload, destination);
#ifdef U2_LOG_TRAFFIC
LogFileOutput("U2: Read IPRAW[%" SIZE_T_FMT "]: +%" SIZE_T_FMT " (%d) -> %d bytes\n", i, lengthOfPayload, len, socket.sn_rx_rsr);
#endif
}
else
{
// drop it
#ifdef U2_LOG_TRAFFIC
LogFileOutput("U2: Skip IPRAW[%" SIZE_T_FMT "]: %" SIZE_T_FMT " (%d) bytes \n", i, lengthOfPayload, len);
#endif
}
}
}
@ -557,7 +659,8 @@ void Uthernet2::receiveOnePacket(const size_t i)
switch (socket.sn_sr)
{
case W5100_SN_SR_SOCK_MACRAW:
receiveOnePacketMacRaw(i);
case W5100_SN_SR_SOCK_IPRAW:
receiveOnePacketRaw();
break;
case W5100_SN_SR_ESTABLISHED:
case W5100_SN_SR_SOCK_UDP:
@ -572,6 +675,29 @@ void Uthernet2::receiveOnePacket(const size_t i)
};
}
void Uthernet2::sendDataIPRaw(const size_t i, std::vector<uint8_t> &payload)
{
const Socket &socket = mySockets[i];
const uint8_t ttl = myMemory[socket.registerAddress + W5100_SN_TTL];
const uint8_t tos = myMemory[socket.registerAddress + W5100_SN_TOS];
const uint8_t protocol = myMemory[socket.registerAddress + W5100_SN_PROTO];
const uint32_t source = readAddress(myMemory.data() + W5100_SIPR0);
const uint32_t destination = readAddress(myMemory.data() + socket.registerAddress + W5100_SN_DIPR0);
const MACAddress * sourceMac = reinterpret_cast<const MACAddress *>(myMemory.data() + W5100_SHAR0);
const MACAddress * destinationMac;
getMACAddress(destination, destinationMac);
std::vector<uint8_t> packet = createETH2Frame(payload, sourceMac, destinationMac, ttl, tos, protocol, source, destination);
#ifdef U2_LOG_TRAFFIC
LogFileOutput("U2: Send IPRAW[%" SIZE_T_FMT "]: %" SIZE_T_FMT " (%" SIZE_T_FMT ") bytes\n", i, payload.size(), packet.size());
#endif
myNetworkBackend->transmit(packet.size(), packet.data());
}
void Uthernet2::sendDataMacRaw(const size_t i, std::vector<uint8_t> &packet) const
{
#ifdef U2_LOG_TRAFFIC
@ -656,6 +782,9 @@ void Uthernet2::sendData(const size_t i)
case W5100_SN_SR_SOCK_MACRAW:
sendDataMacRaw(i, data);
break;
case W5100_SN_SR_SOCK_IPRAW:
sendDataIPRaw(i, data);
break;
case W5100_SN_SR_ESTABLISHED:
case W5100_SN_SR_SOCK_UDP:
sendDataToSocket(i, data);
@ -854,7 +983,7 @@ uint8_t Uthernet2::readSocketRegister(const uint16_t address)
break;
default:
#ifdef U2_LOG_UNKNOWN
LogFileOutput("U2: Get unknown socket register[%" SIZE_T_FMT "]: %04x\n", i, address);
LogFileOutput("U2: Get unknown socket register[%d]: %04x\n", i, address);
#endif
value = myMemory[address];
break;
@ -988,7 +1117,7 @@ void Uthernet2::writeSocketRegister(const uint16_t address, const uint8_t value)
break;
#ifdef U2_LOG_UNKNOWN
default:
LogFileOutput("U2: Set unknown socket register[%" SIZE_T_FMT "]: %04x\n", i, address);
LogFileOutput("U2: Set unknown socket register[%d]: %04x\n", i, address);
break;
#endif
};
@ -1073,6 +1202,7 @@ void Uthernet2::Reset(const bool powerCycle)
// dataAddress is NOT reset, see page 10 of Uthernet II
myDataAddress = 0;
myNetworkBackend = GetFrame().CreateNetworkBackend();
myARPCache.clear();
}
mySockets.clear();
@ -1084,14 +1214,25 @@ void Uthernet2::Reset(const bool powerCycle)
{
resetRXTXBuffers(i);
mySockets[i].clearFD();
mySockets[i].registerAddress = static_cast<uint16_t>(W5100_S0_BASE + (i << 8));
const uint16_t registerAddress = static_cast<uint16_t>(W5100_S0_BASE + (i << 8));
mySockets[i].registerAddress = registerAddress;
myMemory[registerAddress + W5100_SN_DHAR0] = 0xFF;
myMemory[registerAddress + W5100_SN_DHAR1] = 0xFF;
myMemory[registerAddress + W5100_SN_DHAR2] = 0xFF;
myMemory[registerAddress + W5100_SN_DHAR3] = 0xFF;
myMemory[registerAddress + W5100_SN_DHAR4] = 0xFF;
myMemory[registerAddress + W5100_SN_DHAR5] = 0xFF;
myMemory[registerAddress + W5100_SN_TTL] = 0x80;
}
// initial values
myMemory[W5100_RTR0] = 0x07;
myMemory[W5100_RTR1] = 0xD0;
myMemory[W5100_RTR0] = 0x07;
myMemory[W5100_RTR1] = 0xD0;
myMemory[W5100_RCR] = 0x08;
setRXSizes(W5100_RMSR, 0x55);
setTXSizes(W5100_TMSR, 0x55);
myMemory[W5100_PTIMER] = 0x28;
}
BYTE Uthernet2::IO_C0(WORD programcounter, WORD address, BYTE write, BYTE value, ULONG nCycles)
@ -1162,6 +1303,46 @@ void Uthernet2::InitializeIO(LPBYTE pCxRomPeripheral)
RegisterIoHandler(m_slot, u2_C0, u2_C0, nullptr, nullptr, this, nullptr);
}
void Uthernet2::getMACAddress(const uint32_t address, const MACAddress * & mac)
{
const auto it = myARPCache.find(address);
if (it != myARPCache.end())
{
mac = &it->second;
}
else
{
MACAddress & macAddr = myARPCache[address];
const uint32_t source = readAddress(myMemory.data() + W5100_SIPR0);
if (address == source)
{
const uint8_t * sourceMac = myMemory.data() + W5100_SHAR0;
memcpy(macAddr.address, sourceMac, sizeof(macAddr.address));
}
else
{
memset(macAddr.address, 0xFF, sizeof(macAddr.address)); // fallback to broadcast
if (address != INADDR_BROADCAST)
{
const uint32_t subnet = readAddress(myMemory.data() + W5100_SUBR0);
if ((address & subnet) == (source & subnet))
{
// same network: send ARP request
myNetworkBackend->getMACAddress(address, macAddr);
}
else
{
const uint32_t gateway = readAddress(myMemory.data() + W5100_GAR0);
// different network: go via gateway
myNetworkBackend->getMACAddress(gateway, macAddr);
}
}
}
mac = &macAddr;
}
}
void Uthernet2::Update(const ULONG nExecutedCycles)
{
myNetworkBackend->update(nExecutedCycles);

19
source/Uthernet2.h
View File

@ -3,8 +3,10 @@
#include "Card.h"
#include <vector>
#include <map>
class NetworkBackend;
struct MACAddress;
struct Socket
{
@ -47,6 +49,7 @@ struct Socket
* Documentation from
* http://dserver.macgui.com/Uthernet%20II%20manual%2017%20Nov%2018.pdf
* https://www.wiznet.io/wp-content/uploads/wiznethome/Chip/W5100/Document/W5100_DS_V128E.pdf
* https://www.wiznet.io/wp-content/uploads/wiznethome/Chip/W5100/Document/3150Aplus_5100_ES_V260E.pdf
*/
class Uthernet2 : public Card
@ -54,6 +57,8 @@ class Uthernet2 : public Card
public:
static const std::string& GetSnapshotCardName();
enum PacketDestination { HOST, BROADCAST, OTHER };
Uthernet2(UINT slot);
virtual void Destroy(void) {}
@ -72,6 +77,13 @@ private:
uint16_t myDataAddress;
std::shared_ptr<NetworkBackend> myNetworkBackend;
// the real Uthernet II card does not have a ARP Cache
// but in the interest of speeding up the emulator
// we introduce one
std::map<uint32_t, MACAddress> myARPCache;
void getMACAddress(const uint32_t address, const MACAddress * & mac);
void setSocketModeRegister(const size_t i, const uint16_t address, const uint8_t value);
void setTXSizes(const uint16_t address, uint8_t value);
void setRXSizes(const uint16_t address, uint8_t value);
@ -79,11 +91,14 @@ private:
uint8_t getTXFreeSizeRegister(const size_t i, const size_t shift) const;
uint8_t getRXDataSizeRegister(const size_t i, const size_t shift) const;
void receiveOnePacketMacRaw(const size_t i);
void receiveOnePacketRaw();
void receiveOnePacketIPRaw(const size_t i, const size_t lengthOfPayload, const uint8_t * payload, const uint32_t destination, const uint8_t protocol, const int len);
void receiveOnePacketMacRaw(const size_t i, const int size, uint8_t * data);
void receiveOnePacketFromSocket(const size_t i);
void receiveOnePacket(const size_t i);
int receiveForMacAddress(const bool acceptAll, const int size, uint8_t * data);
int receiveForMacAddress(const bool acceptAll, const int size, uint8_t * data, PacketDestination & packetDestination);
void sendDataIPRaw(const size_t i, std::vector<uint8_t> &data);
void sendDataMacRaw(const size_t i, std::vector<uint8_t> &data) const;
void sendDataToSocket(const size_t i, std::vector<uint8_t> &data);
void sendData(const size_t i);

8
source/W5100.h
View File

@ -20,8 +20,10 @@
#define W5100_SIPR3 0x0012
#define W5100_RTR0 0x0017
#define W5100_RTR1 0x0018
#define W5100_RCR 0x0019
#define W5100_RMSR 0x001A
#define W5100_TMSR 0x001B
#define W5100_PTIMER 0x0028
#define W5100_UPORT1 0x002F
#define W5100_S0_BASE 0x0400
#define W5100_S3_MAX 0x07FF
@ -58,6 +60,12 @@
#define W5100_SN_SR 0x03
#define W5100_SN_PORT0 0x04
#define W5100_SN_PORT1 0x05
#define W5100_SN_DHAR0 0x06
#define W5100_SN_DHAR1 0x07
#define W5100_SN_DHAR2 0x08
#define W5100_SN_DHAR3 0x09
#define W5100_SN_DHAR4 0x0A
#define W5100_SN_DHAR5 0x0B
#define W5100_SN_DIPR0 0x0C
#define W5100_SN_DIPR1 0x0D
#define W5100_SN_DIPR2 0x0E