global: support DNS search domains
This has been supported by Windows and Linux for quite some time. Add support here for iOS and macOS. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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27b32e60b2
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9231c03513
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@ -133,8 +133,10 @@ extension TunnelConfiguration {
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let addressString = interface.addresses.map { $0.stringRepresentation }.joined(separator: ", ")
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output.append("Address = \(addressString)\n")
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}
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if !interface.dns.isEmpty {
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let dnsString = interface.dns.map { $0.stringRepresentation }.joined(separator: ", ")
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if !interface.dns.isEmpty || !interface.dnsSearch.isEmpty {
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var dnsLine = interface.dns.map { $0.stringRepresentation }
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dnsLine.append(contentsOf: interface.dnsSearch)
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let dnsString = dnsLine.joined(separator: ", ")
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output.append("DNS = \(dnsString)\n")
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}
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if let mtu = interface.mtu {
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@ -188,13 +190,16 @@ extension TunnelConfiguration {
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}
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if let dnsString = attributes["dns"] {
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var dnsServers = [DNSServer]()
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var dnsSearch = [String]()
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for dnsServerString in dnsString.splitToArray(trimmingCharacters: .whitespacesAndNewlines) {
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guard let dnsServer = DNSServer(from: dnsServerString) else {
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throw ParseError.interfaceHasInvalidDNS(dnsServerString)
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}
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if let dnsServer = DNSServer(from: dnsServerString) {
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dnsServers.append(dnsServer)
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} else {
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dnsSearch.append(dnsServerString)
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}
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}
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interface.dns = dnsServers
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interface.dnsSearch = dnsSearch
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}
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if let mtuString = attributes["mtu"] {
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guard let mtu = UInt16(mtuString) else {
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@ -74,6 +74,7 @@ extension TunnelConfiguration {
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interfaceConfiguration?.addresses = base?.interface.addresses ?? []
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interfaceConfiguration?.dns = base?.interface.dns ?? []
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interfaceConfiguration?.dnsSearch = base?.interface.dnsSearch ?? []
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interfaceConfiguration?.mtu = base?.interface.mtu
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if let interfaceConfiguration = interfaceConfiguration {
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@ -139,8 +139,10 @@ class TunnelViewModel {
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if let mtu = config.mtu {
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scratchpad[.mtu] = String(mtu)
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}
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if !config.dns.isEmpty {
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scratchpad[.dns] = config.dns.map { $0.stringRepresentation }.joined(separator: ", ")
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if !config.dns.isEmpty || !config.dnsSearch.isEmpty {
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var dns = config.dns.map { $0.stringRepresentation }
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dns.append(contentsOf: config.dnsSearch)
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scratchpad[.dns] = dns.joined(separator: ", ")
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}
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return scratchpad
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}
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@ -194,15 +196,16 @@ class TunnelViewModel {
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}
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if let dnsString = scratchpad[.dns] {
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var dnsServers = [DNSServer]()
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var dnsSearch = [String]()
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for dnsServerString in dnsString.splitToArray(trimmingCharacters: .whitespacesAndNewlines) {
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if let dnsServer = DNSServer(from: dnsServerString) {
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dnsServers.append(dnsServer)
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} else {
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fieldsWithError.insert(.dns)
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errorMessages.append(tr("alertInvalidInterfaceMessageDNSInvalid"))
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dnsSearch.append(dnsServerString)
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}
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}
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config.dns = dnsServers
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config.dnsSearch = dnsSearch
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}
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guard errorMessages.isEmpty else { return .error(errorMessages.first!) }
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@ -337,11 +337,6 @@ static bool is_valid_network(string_span_t s)
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return is_valid_ipv4(s) || is_valid_ipv6(s);
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}
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static bool is_valid_dns(string_span_t s)
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{
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return is_valid_ipv4(s) || is_valid_ipv6(s);
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}
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enum field {
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InterfaceSection,
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PrivateKey,
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@ -451,7 +446,12 @@ static void highlight_multivalue_value(struct highlight_span_array *ret, const s
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{
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switch (section) {
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case DNS:
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append_highlight_span(ret, parent.s, s, is_valid_dns(s) ? HighlightIP : HighlightError);
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if (is_valid_ipv4(s) || is_valid_ipv6(s))
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append_highlight_span(ret, parent.s, s, HighlightIP);
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else if (is_valid_hostname(s))
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append_highlight_span(ret, parent.s, s, HighlightHost);
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else
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append_highlight_span(ret, parent.s, s, HighlightError);
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break;
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case Address:
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case AllowedIPs: {
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@ -10,6 +10,7 @@ public struct InterfaceConfiguration {
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public var listenPort: UInt16?
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public var mtu: UInt16?
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public var dns = [DNSServer]()
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public var dnsSearch = [String]()
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public init(privateKey: PrivateKey) {
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self.privateKey = privateKey
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@ -25,6 +26,7 @@ extension InterfaceConfiguration: Equatable {
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lhsAddresses == rhsAddresses &&
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lhs.listenPort == rhs.listenPort &&
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lhs.mtu == rhs.mtu &&
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lhs.dns == rhs.dns
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lhs.dns == rhs.dns &&
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lhs.dnsSearch == rhs.dnsSearch
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}
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}
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@ -85,6 +85,7 @@ class PacketTunnelSettingsGenerator {
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let dnsServerStrings = tunnelConfiguration.interface.dns.map { $0.stringRepresentation }
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let dnsSettings = NEDNSSettings(servers: dnsServerStrings)
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dnsSettings.searchDomains = tunnelConfiguration.interface.dnsSearch
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dnsSettings.matchDomains = [""] // All DNS queries must first go through the tunnel's DNS
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networkSettings.dnsSettings = dnsSettings
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