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MTU integration in taps.

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This commit is contained in:
Adam Ierymenko 2017-05-04 19:31:50 -07:00
parent 909a14fb48
commit b55422a528
9 changed files with 82 additions and 75 deletions
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41
osdep/WindowsEthernetTap.cpp
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@ -470,6 +470,7 @@ WindowsEthernetTap::WindowsEthernetTap(
_arg(arg),
_mac(mac),
_nwid(nwid),
_mtu(mtu),
_tap(INVALID_HANDLE_VALUE),
_injectSemaphore(INVALID_HANDLE_VALUE),
_pathToHelpers(hp),
@ -481,10 +482,6 @@ WindowsEthernetTap::WindowsEthernetTap(
char subkeyClass[1024];
char data[1024];
char tag[24];
std::string mySubkeyName;
if (mtu > 2800)
throw std::runtime_error("MTU too large.");
// We "tag" registry entries with the network ID to identify persistent devices
Utils::snprintf(tag,sizeof(tag),"%.16llx",(unsigned long long)nwid);
@ -530,7 +527,7 @@ WindowsEthernetTap::WindowsEthernetTap(
_netCfgInstanceId = instanceId;
_deviceInstanceId = instanceIdPath;
mySubkeyName = subkeyName;
_mySubkeyName = subkeyName;
break; // found it!
}
}
@ -573,7 +570,7 @@ WindowsEthernetTap::WindowsEthernetTap(
if (RegGetValueA(nwAdapters,subkeyName,"DeviceInstanceID",RRF_RT_ANY,&type,(PVOID)data,&dataLen) == ERROR_SUCCESS)
_deviceInstanceId.assign(data,dataLen);
mySubkeyName = subkeyName;
_mySubkeyName = subkeyName;
// Disable DHCP by default on new devices
HKEY tcpIpInterfaces;
@ -605,24 +602,24 @@ WindowsEthernetTap::WindowsEthernetTap(
if (_netCfgInstanceId.length() > 0) {
char tmps[64];
unsigned int tmpsl = Utils::snprintf(tmps,sizeof(tmps),"%.2X-%.2X-%.2X-%.2X-%.2X-%.2X",(unsigned int)mac[0],(unsigned int)mac[1],(unsigned int)mac[2],(unsigned int)mac[3],(unsigned int)mac[4],(unsigned int)mac[5]) + 1;
RegSetKeyValueA(nwAdapters,mySubkeyName.c_str(),"NetworkAddress",REG_SZ,tmps,tmpsl);
RegSetKeyValueA(nwAdapters,mySubkeyName.c_str(),"MAC",REG_SZ,tmps,tmpsl);
RegSetKeyValueA(nwAdapters,_mySubkeyName.c_str(),"NetworkAddress",REG_SZ,tmps,tmpsl);
RegSetKeyValueA(nwAdapters,_mySubkeyName.c_str(),"MAC",REG_SZ,tmps,tmpsl);
tmpsl = Utils::snprintf(tmps, sizeof(tmps), "%d", mtu);
RegSetKeyValueA(nwAdapters,mySubkeyName.c_str(),"MTU",REG_SZ,tmps,tmpsl);
RegSetKeyValueA(nwAdapters,_mySubkeyName.c_str(),"MTU",REG_SZ,tmps,tmpsl);
DWORD tmp = 0;
RegSetKeyValueA(nwAdapters,mySubkeyName.c_str(),"*NdisDeviceType",REG_DWORD,(LPCVOID)&tmp,sizeof(tmp));
RegSetKeyValueA(nwAdapters,_mySubkeyName.c_str(),"*NdisDeviceType",REG_DWORD,(LPCVOID)&tmp,sizeof(tmp));
tmp = IF_TYPE_ETHERNET_CSMACD;
RegSetKeyValueA(nwAdapters,mySubkeyName.c_str(),"*IfType",REG_DWORD,(LPCVOID)&tmp,sizeof(tmp));
RegSetKeyValueA(nwAdapters,_mySubkeyName.c_str(),"*IfType",REG_DWORD,(LPCVOID)&tmp,sizeof(tmp));
if (creatingNewDevice) {
// Vista/2008 does not set this
if (newDeviceInstanceId.length() > 0)
RegSetKeyValueA(nwAdapters,mySubkeyName.c_str(),"DeviceInstanceID",REG_SZ,newDeviceInstanceId.c_str(),(DWORD)newDeviceInstanceId.length());
RegSetKeyValueA(nwAdapters,_mySubkeyName.c_str(),"DeviceInstanceID",REG_SZ,newDeviceInstanceId.c_str(),(DWORD)newDeviceInstanceId.length());
// Set EnableDHCP to 0 by default on new devices
tmp = 0;
RegSetKeyValueA(nwAdapters,mySubkeyName.c_str(),"EnableDHCP",REG_DWORD,(LPCVOID)&tmp,sizeof(tmp));
RegSetKeyValueA(nwAdapters,_mySubkeyName.c_str(),"EnableDHCP",REG_DWORD,(LPCVOID)&tmp,sizeof(tmp));
}
RegCloseKey(nwAdapters);
} else {
@ -792,11 +789,11 @@ std::vector<InetAddress> WindowsEthernetTap::ips() const
void WindowsEthernetTap::put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len)
{
if ((!_initialized)||(!_enabled)||(_tap == INVALID_HANDLE_VALUE)||(len > (ZT_IF_MTU)))
if ((!_initialized)||(!_enabled)||(_tap == INVALID_HANDLE_VALUE)||(len > _mtu))
return;
Mutex::Lock _l(_injectPending_m);
_injectPending.push( std::pair<Array<char,ZT_IF_MTU + 32>,unsigned int>(Array<char,ZT_IF_MTU + 32>(),len + 14) );
_injectPending.push( std::pair<Array<char,ZT_MAX_MTU + 32>,unsigned int>(Array<char,ZT_MAX_MTU + 32>(),len + 14) );
char *d = _injectPending.back().first.data;
to.copyTo(d,6);
from.copyTo(d + 6,6);
@ -875,6 +872,12 @@ void WindowsEthernetTap::scanMulticastGroups(std::vector<MulticastGroup> &added,
_multicastGroups.swap(newGroups);
}
void WindowsEthernetTap::setMtu(unsigned int mtu)
{
if (mtu != _mtu) {
}
}
NET_IFINDEX WindowsEthernetTap::interfaceIndex() const
{
NET_IFINDEX idx = -1;
@ -886,7 +889,7 @@ NET_IFINDEX WindowsEthernetTap::interfaceIndex() const
void WindowsEthernetTap::threadMain()
throw()
{
char tapReadBuf[ZT_IF_MTU + 32];
char tapReadBuf[ZT_MAX_MTU + 32];
char tapPath[128];
HANDLE wait4[3];
OVERLAPPED tapOvlRead,tapOvlWrite;
@ -1015,9 +1018,7 @@ void WindowsEthernetTap::threadMain()
ReadFile(_tap,tapReadBuf,sizeof(tapReadBuf),NULL,&tapOvlRead);
bool writeInProgress = false;
ULONGLONG timeOfLastBorkCheck = GetTickCount64();
_initialized = true;
_initialized = true;
while (_run) {
DWORD waitResult = WaitForMultipleObjectsEx(writeInProgress ? 3 : 2,wait4,FALSE,2500,TRUE);
@ -1070,7 +1071,7 @@ void WindowsEthernetTap::threadMain()
} catch ( ... ) {} // handlers should not throw
}
}
ReadFile(_tap,tapReadBuf,ZT_IF_MTU + 32,NULL,&tapOvlRead);
ReadFile(_tap,tapReadBuf,ZT_MAX_MTU + 32,NULL,&tapOvlRead);
}
if (writeInProgress) {