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[bugfix] restore manually configured DNS on Windows #202

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Merged
batchar2 merged 1 commit into from
Jan 18, 2026
Merged

[bugfix] restore manually configured DNS on Windows #202

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25 changes: 22 additions & 3 deletions src/fptn-client/routing/route_manager.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -401,7 +401,20 @@ bool RouteManager::Apply() {
fmt::format("route add {} mask 255.255.255.255 {} METRIC 2 {}",
dns_server_ipv4_.ToString(), tun_interface_address_ipv4_.ToString(),
interfaceInfo), // via TUN
// DNS
// DNS
// Load saved DNS IPv4 if was error
R"(powershell -Command "if(Test-Path \"$env:TEMP\fptn_dns_saved_ipv4.txt\"){$primary=Get-Content \"$env:TEMP\fptn_dns_saved_ipv4.txt\";Get-NetAdapter|ForEach{Set-DnsClientServerAddress -InterfaceIndex $_.InterfaceIndex -ServerAddresses @($primary)};Remove-Item \"$env:TEMP\fptn_dns_saved_ipv4.txt\"}")",
R"(powershell -Command "if(Test-Path \"$env:TEMP\fptn_dns_saved_ipv4_alt.txt\"){$secondary=Get-Content \"$env:TEMP\fptn_dns_saved_ipv4_alt.txt\";$currentDns=(Get-DnsClientServerAddress|Where{$_.AddressFamily-eq2}).ServerAddresses;$newDns=if($currentDns.Count-gt0){@($currentDns[0],$secondary)}else{@($secondary)};Get-NetAdapter|ForEach{Set-DnsClientServerAddress -InterfaceIndex $_.InterfaceIndex -ServerAddresses $newDns};Remove-Item \"$env:TEMP\fptn_dns_saved_ipv4_alt.txt\"}")",
// Load saved DNS IPv6 if was error
R"(powershell -Command "if(Test-Path \"$env:TEMP\fptn_dns_saved_ipv6.txt\"){$primary=Get-Content \"$env:TEMP\fptn_dns_saved_ipv6.txt\";Get-NetAdapter|ForEach{Set-DnsClientServerAddress -InterfaceIndex $_.InterfaceIndex -ServerAddresses @($primary)};Remove-Item \"$env:TEMP\fptn_dns_saved_ipv6.txt\"}")",
R"(powershell -Command "if(Test-Path \"$env:TEMP\fptn_dns_saved_ipv6_alt.txt\"){$secondary=Get-Content \"$env:TEMP\fptn_dns_saved_ipv6_alt.txt\";$currentDns=(Get-DnsClientServerAddress|Where{$_.AddressFamily-eq23}).ServerAddresses;$newDns=if($currentDns.Count-gt0){@($currentDns[0],$secondary)}else{@($secondary)};Get-NetAdapter|ForEach{Set-DnsClientServerAddress -InterfaceIndex $_.InterfaceIndex -ServerAddresses $newDns};Remove-Item \"$env:TEMP\fptn_dns_saved_ipv6_alt.txt\"}")",
// Save IPv4 DNS
R"(powershell -Command "$dns=(Get-DnsClientServerAddress|Where{$_.AddressFamily-eq2-and$_.ServerAddresses.Count-gt0}).ServerAddresses;if($dns.Count-gt0){$dns[0]|Out-File \"$env:TEMP\fptn_dns_saved_ipv4.txt\" -NoNewline}")",
R"(powershell -Command "$dns=(Get-DnsClientServerAddress|Where{$_.AddressFamily-eq2-and$_.ServerAddresses.Count-gt1}).ServerAddresses;if($dns.Count-gt1){$dns[1]|Out-File \"$env:TEMP\fptn_dns_saved_ipv4_alt.txt\" -NoNewline}")",
// Save IPv6 DNS
R"(powershell -Command "$dns=(Get-DnsClientServerAddress|Where{$_.AddressFamily-eq23-and$_.ServerAddresses.Count-gt0}).ServerAddresses;if($dns.Count-gt0){$dns[0]|Out-File \"$env:TEMP\fptn_dns_saved_ipv6.txt\" -NoNewline}")",
R"(powershell -Command "$dns=(Get-DnsClientServerAddress|Where{$_.AddressFamily-eq23-and$_.ServerAddresses.Count-gt1}).ServerAddresses;if($dns.Count-gt1){$dns[1]|Out-File \"$env:TEMP\fptn_dns_saved_ipv6_alt.txt\" -NoNewline}")",
// Set new DNS server
fmt::format("netsh interface ip set dns name=\"{}\" static {}",
tun_interface_name_, dns_server_ipv4_.ToString()),
// IPv6
Expand Down Expand Up @@ -563,9 +576,15 @@ bool RouteManager::Clean() { // NOLINT(bugprone-exception-escape)
fmt::format("route delete {} mask 255.255.255.255 {} METRIC 2 {}",
dns_server_ipv4_.ToString(), tun_interface_address_ipv4_.ToString(),
interface_info), // via TUN
// IPv6
// IPv6
fmt::format("netsh interface ipv6 delete dnsservers \"{}\" {}",
tun_interface_name_, dns_server_ipv6_.ToString())};
tun_interface_name_, dns_server_ipv6_.ToString()),
// Load saved DNS IPv4
R"(powershell -Command "if(Test-Path \"$env:TEMP\fptn_dns_saved_ipv4.txt\"){$primary=Get-Content \"$env:TEMP\fptn_dns_saved_ipv4.txt\";Get-NetAdapter|ForEach{Set-DnsClientServerAddress -InterfaceIndex $_.InterfaceIndex -ServerAddresses @($primary)};Remove-Item \"$env:TEMP\fptn_dns_saved_ipv4.txt\"}")",
R"(powershell -Command "if(Test-Path \"$env:TEMP\fptn_dns_saved_ipv4_alt.txt\"){$secondary=Get-Content \"$env:TEMP\fptn_dns_saved_ipv4_alt.txt\";$currentDns=(Get-DnsClientServerAddress|Where{$_.AddressFamily-eq2}).ServerAddresses;$newDns=if($currentDns.Count-gt0){@($currentDns[0],$secondary)}else{@($secondary)};Get-NetAdapter|ForEach{Set-DnsClientServerAddress -InterfaceIndex $_.InterfaceIndex -ServerAddresses $newDns};Remove-Item \"$env:TEMP\fptn_dns_saved_ipv4_alt.txt\"}")",
// Load saved DNS IPv6
R"(powershell -Command "if(Test-Path \"$env:TEMP\fptn_dns_saved_ipv6.txt\"){$primary=Get-Content \"$env:TEMP\fptn_dns_saved_ipv6.txt\";Get-NetAdapter|ForEach{Set-DnsClientServerAddress -InterfaceIndex $_.InterfaceIndex -ServerAddresses @($primary)};Remove-Item \"$env:TEMP\fptn_dns_saved_ipv6.txt\"}")",
R"(powershell -Command "if(Test-Path \"$env:TEMP\fptn_dns_saved_ipv6_alt.txt\"){$secondary=Get-Content \"$env:TEMP\fptn_dns_saved_ipv6_alt.txt\";$currentDns=(Get-DnsClientServerAddress|Where{$_.AddressFamily-eq23}).ServerAddresses;$newDns=if($currentDns.Count-gt0){@($currentDns[0],$secondary)}else{@($secondary)};Get-NetAdapter|ForEach{Set-DnsClientServerAddress -InterfaceIndex $_.InterfaceIndex -ServerAddresses $newDns};Remove-Item \"$env:TEMP\fptn_dns_saved_ipv6_alt.txt\"}")"};
#else
#error "Unsupported system!"
#endif
Expand Down