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WinFWHelper.cpp
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#include "WinFWHelper.hpp"
namespace ZeroTier {
void ZeroTier::WinFWHelper::newICMPRule(const InetAddress& ip, uint64_t nwid)
{
char nwString[32] = { 0 };
char ipbuf[64];
sprintf(nwString, "%.16llx", nwid);
std::string nwString2 = { nwString };
ip.toString(ipbuf);
if (ip.isV4()) {
WinFWHelper::newICMPv4Rule(ipbuf, nwid);
}
else {
WinFWHelper::newICMPv6Rule(ipbuf, nwid);
}
}
void ZeroTier::WinFWHelper::removeICMPRule(const InetAddress& ip, uint64_t nwid)
{
char nwString[32] = { 0 };
char ipbuf[64];
sprintf(nwString, "%.16llx", nwid);
std::string nwString2 = { nwString };
ip.toString(ipbuf);
if (ip.isV4()) {
WinFWHelper::removeICMPv4Rule(ipbuf, nwid);
}
else {
WinFWHelper::removeICMPv6Rule(ipbuf, nwid);
}
}
void WinFWHelper::newICMPv4Rule(std::string address, uint64_t nwid)
{
// allows icmp, scoped to a specific ip address and interface name
char nwString[32] = { 0 };
sprintf(nwString, "%.16llx", nwid);
std::string nwString2 = { nwString };
std::string cmd = R"(C:\Windows\System32\WindowsPowershell\v1.0\powershell.exe "New-NetFirewallRule -DisplayName zerotier-icmpv4-)" + nwString2 + address +
R"( -InterfaceAlias 'ZeroTier One `[)" + nwString2 + R"(`]')" +
" -Protocol ICMPv4 -Action Allow" +
" -LocalAddress " + address + "\"\r\n";
_run(cmd);
}
void WinFWHelper::newICMPv6Rule(std::string address, uint64_t nwid)
{
// allows icmp, scoped to a specific ip address and interface name
char nwString[32] = { 0 };
sprintf(nwString, "%.16llx", nwid);
std::string nwString2 = { nwString };
std::string cmd = R"(C:\Windows\System32\WindowsPowershell\v1.0\powershell.exe "New-NetFirewallRule -DisplayName zerotier-icmpv6-)" + nwString2 + address +
R"( -InterfaceAlias 'ZeroTier One `[)" + nwString2 + R"(`]')" +
" -Protocol ICMPv6 -Action Allow" +
" -LocalAddress " + address + "\"\r\n";
_run(cmd);
}
void WinFWHelper::removeICMPv4Rule(std::string addr, uint64_t nwid)
{
// removes 1 icmp firewall rule
char nwString[32] = { 0 };
sprintf(nwString, "%.16llx", nwid);
std::string nwString2 = { nwString };
std::string cmd = R"(C:\Windows\System32\WindowsPowershell\v1.0\powershell.exe "Remove-NetFirewallRule -DisplayName zerotier-icmpv4-)" + nwString2 + addr +
"\"\r\n";
_run(cmd);
}
void WinFWHelper::removeICMPv6Rule(std::string addr, uint64_t nwid)
{
// removes 1 icmp firewall rule
char nwString[32] = { 0 };
sprintf(nwString, "%.16llx", nwid);
std::string nwString2 = { nwString };
std::string cmd = R"(C:\Windows\System32\WindowsPowershell\v1.0\powershell.exe "Remove-NetFirewallRule -DisplayName zerotier-icmpv6-)" + nwString2 + addr +
"\"\r\n";
_run(cmd);
}
void WinFWHelper::removeICMPv4Rules(uint64_t nwid)
{
// removes all icmp firewall rules for this network id
char nwString[32] = { 0 };
sprintf(nwString, "%.16llx", nwid);
std::string nwString2 = { nwString };
std::string cmd = R"(C:\Windows\System32\WindowsPowershell\v1.0\powershell.exe "Remove-NetFirewallRule -DisplayName zerotier-icmpv4-)" + nwString2 + "*\" \r\n";
_run(cmd);
}
void WinFWHelper::removeICMPv6Rules(uint64_t nwid)
{
// removes all icmp firewall rules for this network id
char nwString[32] = { 0 };
sprintf(nwString, "%.16llx", nwid);
std::string nwString2 = { nwString };
std::string cmd = R"(C:\Windows\System32\WindowsPowershell\v1.0\powershell.exe "Remove-NetFirewallRule -DisplayName zerotier-icmpv6-)" + nwString2 + "*\" \r\n";
_run(cmd);
}
void WinFWHelper::removeICMPRules()
{
// removes all icmp firewall rules for all networks
std::string cmd = R"(C:\Windows\System32\WindowsPowershell\v1.0\powershell.exe "Remove-NetFirewallRule -DisplayName zerotier-icmp*)" + std::string("\r\n");
_run(cmd);
}
void WinFWHelper::removeICMPRules(uint64_t nwid)
{
// removes all icmp firewall rules for this network
WinFWHelper::removeICMPv4Rules(nwid);
WinFWHelper::removeICMPv6Rules(nwid);
}
void WinFWHelper::_run(std::string cmd)
{
#ifdef ZT_DEBUG
fprintf(stderr, cmd.c_str());
#endif
STARTUPINFOA startupInfo;
PROCESS_INFORMATION processInfo;
startupInfo.cb = sizeof(startupInfo);
memset(&startupInfo, 0, sizeof(STARTUPINFOA));
memset(&processInfo, 0, sizeof(PROCESS_INFORMATION));
if (CreateProcessA(NULL, (LPSTR)cmd.c_str(), NULL, NULL, FALSE, CREATE_NO_WINDOW, NULL, NULL, &startupInfo, &processInfo)) {
WaitForSingleObject(processInfo.hProcess, INFINITE);
CloseHandle(processInfo.hProcess);
CloseHandle(processInfo.hThread);
}
}
} // namespace ZeroTier