Moved ResolveConf specific logic to it's own file.
This commit is contained in:
parent
3ad50e79cf
commit
9897a4dc2d
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@ -1,23 +1,17 @@
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package dorkbox.netUtil
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package dorkbox.netUtil
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import com.sun.jna.Memory
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import com.sun.jna.Pointer.*
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import com.sun.jna.platform.win32.WinError
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import dorkbox.executor.Executor
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import dorkbox.executor.Executor
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import dorkbox.netUtil.hosts.DefaultHostsFileResolver
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import dorkbox.netUtil.dnsUtils.DefaultHostsFileResolver
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import dorkbox.netUtil.hosts.ResolvedAddressTypes
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import dorkbox.netUtil.dnsUtils.ResolveConf
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import dorkbox.netUtil.jna.windows.IPHlpAPI
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import dorkbox.netUtil.dnsUtils.ResolvedAddressTypes
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import dorkbox.netUtil.jna.windows.structs.IP_ADAPTER_ADDRESSES_LH
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import java.io.BufferedWriter
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import dorkbox.netUtil.jna.windows.structs.IP_ADAPTER_DNS_SERVER_ADDRESS_XP
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import java.io.File
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import java.io.*
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import java.io.FileWriter
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import java.net.*
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import java.io.IOException
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import java.nio.file.Files
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import java.net.Inet4Address
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import java.nio.file.Paths
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import java.net.Inet6Address
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import java.util.*
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import java.net.InetAddress
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import javax.naming.Context
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import java.net.InetSocketAddress
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import javax.naming.NamingException
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import javax.naming.directory.DirContext
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import javax.naming.directory.InitialDirContext
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object Dns {
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object Dns {
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@ -28,10 +22,6 @@ object Dns {
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const val DEFAULT_SEARCH_DOMAIN = ""
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const val DEFAULT_SEARCH_DOMAIN = ""
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private const val NAMESERVER_ROW_LABEL = "nameserver"
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private const val DOMAIN_ROW_LABEL = "domain"
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private const val PORT_ROW_LABEL = "port"
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/**
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/**
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* @throws IOException if the DNS resolve.conf file cannot be read
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* @throws IOException if the DNS resolve.conf file cannot be read
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*/
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*/
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@ -61,7 +51,6 @@ object Dns {
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}
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}
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}
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}
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/**
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/**
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* Resolve the address of a hostname against the entries in a hosts file, depending on some address types.
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* Resolve the address of a hostname against the entries in a hosts file, depending on some address types.
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*
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*
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@ -76,7 +65,7 @@ object Dns {
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/** Returns all name servers, including the default ones. */
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/** Returns all name servers, including the default ones. */
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val nameServers: Map<String, List<InetSocketAddress>> by lazy {
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val nameServers: Map<String, List<InetSocketAddress>> by lazy {
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getUnsortedNameServers()
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ResolveConf.getUnsortedNameServers()
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}
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}
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/** Returns all default name servers. */
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/** Returns all default name servers. */
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@ -94,212 +83,6 @@ object Dns {
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}
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}
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}
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}
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// largely from:
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// https://github.com/dnsjava/dnsjava/blob/fb4889ee7a73f391f43bf6dc78b019d87ae15f15/src/main/java/org/xbill/DNS/config/BaseResolverConfigProvider.java#L22
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private fun getUnsortedNameServers(): Map<String, List<InetSocketAddress>> {
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val nameServerDomains = mutableMapOf<String, List<InetSocketAddress>>()
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// Using jndi-dns to obtain the default name servers.
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//
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// See:
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// - http://docs.oracle.com/javase/8/docs/technotes/guides/jndi/jndi-dns.html
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// - http://mail.openjdk.java.net/pipermail/net-dev/2017-March/010695.html
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// Using jndi-dns to obtain the default name servers.
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//
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// See:
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// - http://docs.oracle.com/javase/8/docs/technotes/guides/jndi/jndi-dns.html
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// - http://mail.openjdk.java.net/pipermail/net-dev/2017-March/010695.html
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val env = Hashtable<String, String>()
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env[Context.INITIAL_CONTEXT_FACTORY] = "com.sun.jndi.dns.DnsContextFactory"
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env["java.naming.provider.url"] = "dns://"
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try {
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val ctx: DirContext = InitialDirContext(env)
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val dnsUrls = ctx.environment["java.naming.provider.url"] as String?
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if (dnsUrls != null) {
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val servers = dnsUrls.split(" ".toRegex()).toTypedArray()
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for (server in servers) {
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try {
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putIfAbsent(nameServerDomains, DEFAULT_SEARCH_DOMAIN, Common.socketAddress(URI(server).host, 53))
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} catch (e: URISyntaxException) {
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Common.logger.debug("Skipping a malformed nameserver URI: {}", server, e)
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}
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}
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}
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} catch (ignore: NamingException) {
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// Will also try JNA/etc if this fails.
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}
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if (Common.OS_WINDOWS) {
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// have to use JNA to access the WINDOWS resolver info
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// modified from: https://github.com/dnsjava/dnsjava/blob/master/src/main/java/org/xbill/DNS/config/WindowsResolverConfigProvider.java
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// The recommended method of calling the GetAdaptersAddresses function is to pre-allocate a 15KB working buffer
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var buffer: Memory? = Memory(15 * 1024)
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val size: com.sun.jna.ptr.IntByReference = com.sun.jna.ptr.IntByReference(0)
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val flags: Int = IPHlpAPI.GAA_FLAG_SKIP_UNICAST or
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IPHlpAPI.GAA_FLAG_SKIP_ANYCAST or
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IPHlpAPI.GAA_FLAG_SKIP_MULTICAST or
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IPHlpAPI.GAA_FLAG_SKIP_FRIENDLY_NAME
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var error: Int = IPHlpAPI.GetAdaptersAddresses(
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IPHlpAPI.AF_UNSPEC,
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flags,
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NULL,
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buffer,
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size
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)
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if (error == WinError.ERROR_BUFFER_OVERFLOW) {
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buffer = Memory(size.value.toLong())
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error = IPHlpAPI.GetAdaptersAddresses(
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IPHlpAPI.AF_UNSPEC,
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flags,
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NULL,
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buffer,
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size
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)
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}
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if (error == WinError.ERROR_SUCCESS) {
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var result: IP_ADAPTER_ADDRESSES_LH? = IP_ADAPTER_ADDRESSES_LH(buffer)
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while (result != null) {
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// only interfaces with IfOperStatusUp
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if (result.OperStatus == 1) {
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var dns: IP_ADAPTER_DNS_SERVER_ADDRESS_XP? = result.FirstDnsServerAddress
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while (dns != null) {
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var address: InetAddress
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try {
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address = dns.Address.toAddress()
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if (address is Inet4Address || !address.isSiteLocalAddress) {
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putIfAbsent(nameServerDomains, DEFAULT_SEARCH_DOMAIN, Common.socketAddress(address, 53))
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} else {
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Common.logger.debug(
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"Skipped site-local IPv6 server address {} on adapter index {}",
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address,
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result.IfIndex
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)
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}
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} catch (e: UnknownHostException) {
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Common.logger.warn("Invalid nameserver address on adapter index {}", result.IfIndex, e)
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}
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dns = dns.Next
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}
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}
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result = result.Next
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}
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}
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} else {
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// try resolve.conf
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// first try the default unix config path
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var tryParse = tryParseResolvConfNameservers("/etc/resolv.conf")
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if (!tryParse.first) {
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// then fallback to netware
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tryParse = tryParseResolvConfNameservers("sys:/etc/resolv.cfg")
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}
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if (tryParse.first) {
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// we can have DIFFERENT name servers for DIFFERENT domains!
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tryParse.second
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}
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}
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// if we STILL don't have anything, add global nameservers to the default search domain
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if (nameServerDomains[DEFAULT_SEARCH_DOMAIN] == null) {
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putIfAbsent(nameServerDomains, DEFAULT_SEARCH_DOMAIN, Common.socketAddress("1.1.1.1", 53)) // cloudflare
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putIfAbsent(nameServerDomains, DEFAULT_SEARCH_DOMAIN, Common.socketAddress("1.1.1.1", 53)) // google
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}
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return nameServerDomains
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}
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private fun tryParseResolvConfNameservers(path: String): Pair<Boolean, Map<String, List<InetSocketAddress>>> {
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val p = Paths.get(path)
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if (Files.exists(p)) {
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try {
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FileReader(path).use { fr ->
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BufferedReader(fr).use { br ->
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var nameServers = mutableListOf<InetSocketAddress>()
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val nameServerDomains = mutableMapOf<String, List<InetSocketAddress>>()
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var domainName = DEFAULT_SEARCH_DOMAIN
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var port = 53
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var line0: String?
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loop@ while (br.readLine().also { line0 = it?.trim() } != null) {
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val line = line0!!
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if (line.isEmpty()) {
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continue@loop
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}
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val c = line[0]
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if (c == '#' || c == ';') {
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continue
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}
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if (line.startsWith(NAMESERVER_ROW_LABEL)) {
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var i = indexOfNonWhiteSpace(line, NAMESERVER_ROW_LABEL.length)
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require(i < 0) {
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"error parsing label $NAMESERVER_ROW_LABEL in file $path. value: $line"
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}
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var maybeIP = line.substring(i)
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// There may be a port appended onto the IP address so we attempt to extract it.
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// There may be a port appended onto the IP address so we attempt to extract it.
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if (!IPv4.isValid(maybeIP) && !IPv6.isValid(maybeIP)) {
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i = maybeIP.lastIndexOf('.')
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require(i + 1 >= maybeIP.length) {
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"error parsing label $NAMESERVER_ROW_LABEL in file $path. invalid IP value: $line"
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}
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port = maybeIP.substring(i + 1).toInt()
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maybeIP = maybeIP.substring(0, i)
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}
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nameServers.add(Common.socketAddress(maybeIP, port))
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} else if (line.startsWith(DOMAIN_ROW_LABEL)) {
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// nameservers can be SPECIFIC to a search domain
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val i = indexOfNonWhiteSpace(line, DOMAIN_ROW_LABEL.length)
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require(i >= 0) {
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"error parsing label $DOMAIN_ROW_LABEL in file $path value: $line"
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}
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// we have a NEW domain! add the PREVIOUS nameServers and start again.
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putIfAbsent(nameServerDomains, domainName, nameServers)
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nameServers = mutableListOf()
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domainName = line.substring(i)
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} else if (line.startsWith(PORT_ROW_LABEL)) {
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val i = indexOfNonWhiteSpace(line, PORT_ROW_LABEL.length)
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require(i < 0) {
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"error parsing label $PORT_ROW_LABEL in file $path value: $line"
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}
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port = line.substring(i).toInt()
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}
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}
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// when done parsing the file, ALWAYS add the nameServer domains (since they have not been added yet)
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putIfAbsent(nameServerDomains, domainName, nameServers)
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return Pair(true, nameServerDomains)
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}
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}
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} catch (e: IOException) {
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Common.logger.error("Error parsing $path", e)
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}
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}
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return Pair(false, mutableMapOf())
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}
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/**
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/**
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* Gets the threshold for the number of dots which must appear in a name before it is considered
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* Gets the threshold for the number of dots which must appear in a name before it is considered
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* absolute. The default is 1.
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* absolute. The default is 1.
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@ -309,211 +92,12 @@ object Dns {
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1
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1
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} else {
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} else {
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// first try the default unix config path
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// first try the default unix config path
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var tryParse = tryParseResolvConfNDots("/etc/resolv.conf")
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var tryParse = ResolveConf.tryParseResolvConfNDots("/etc/resolv.conf")
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if (!tryParse.first) {
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if (!tryParse.first) {
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// then fallback to netware
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// then fallback to netware
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tryParse = tryParseResolvConfNDots("sys:/etc/resolv.cfg")
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tryParse = ResolveConf.tryParseResolvConfNDots("sys:/etc/resolv.cfg")
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}
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}
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tryParse.second
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tryParse.second
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}
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}
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}
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}
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private fun tryParseResolvConfNDots(path: String): Pair<Boolean, Int> {
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val p = Paths.get(path)
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if (Files.exists(p)) {
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try {
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Files.newInputStream(p).use { `in` ->
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return Pair(true, getNdots(`in`))
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}
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} catch (e: IOException) {
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// ignore
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}
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}
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return Pair(false, 1)
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}
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// @kotlin.jvm.Throws(IOException::class)
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// private fun parseResolvConf(`in`: InputStream) {
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// InputStreamReader(`in`).use { isr ->
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// BufferedReader(isr).use { br ->
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//
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// var line: String?
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// loop@ while (br.readLine().also { line = it } != null) {
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// val st = StringTokenizer(line)
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// if (!st.hasMoreTokens()) {
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// continue
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// }
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// when (st.nextToken()) {
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// "domain" -> {
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// // man resolv.conf:
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// // The domain and search keywords are mutually exclusive. If more than one instance of
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// // these keywords is present, the last instance wins.
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// searchlist.clear()
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// if (!st.hasMoreTokens()) {
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// continue@loop
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// }
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// addSearchPath(st.nextToken())
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// }
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// "search" -> {
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// // man resolv.conf:
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// // The domain and search keywords are mutually exclusive. If more than one instance of
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// // these keywords is present, the last instance wins.
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// searchlist.clear()
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// while (st.hasMoreTokens()) {
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// addSearchPath(st.nextToken())
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// }
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// }
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// }
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// }
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// }
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// }
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//
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// // man resolv.conf:
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// // The search keyword of a system's resolv.conf file can be overridden on a per-process basis by
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// // setting the environment variable LOCALDOMAIN to a space-separated list of search domains.
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// val localdomain = System.getenv("LOCALDOMAIN")
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// if (localdomain != null && !localdomain.isEmpty()) {
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// searchlist.clear()
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// parseSearchPathList(localdomain, " ")
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// }
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// }
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// @kotlin.jvm.Throws(IOException::class)
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private fun getNdots(`in`: InputStream): Int {
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var ndots = 1
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InputStreamReader(`in`).use { isr ->
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BufferedReader(isr).use { br ->
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var line: String?
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loop@ while (br.readLine().also { line = it } != null) {
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val st = StringTokenizer(line)
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if (!st.hasMoreTokens()) {
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continue
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}
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when (st.nextToken()) {
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"domain" -> {
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// man resolv.conf:
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// The domain and search keywords are mutually exclusive. If more than one instance of
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// these keywords is present, the last instance wins.
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|
||||||
if (!st.hasMoreTokens()) {
|
|
||||||
continue@loop
|
|
||||||
}
|
|
||||||
}
|
|
||||||
"search" -> {
|
|
||||||
// man resolv.conf:
|
|
||||||
// The domain and search keywords are mutually exclusive. If more than one instance of
|
|
||||||
// these keywords is present, the last instance wins.
|
|
||||||
while (st.hasMoreTokens()) {
|
|
||||||
val token = st.nextToken()
|
|
||||||
if (token.startsWith("ndots:")) {
|
|
||||||
ndots = parseNdots(token.substring(6))
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
"options" -> while (st.hasMoreTokens()) {
|
|
||||||
val token = st.nextToken()
|
|
||||||
if (token.startsWith("ndots:")) {
|
|
||||||
ndots = parseNdots(token.substring(6))
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
// man resolv.conf:
|
|
||||||
// The options keyword of a system's resolv.conf file can be amended on a per-process basis by
|
|
||||||
// setting the environment variable RES_OPTIONS to a space-separated list of resolver options as
|
|
||||||
// explained above under options.
|
|
||||||
val resOptions = System.getenv("RES_OPTIONS")
|
|
||||||
if (resOptions != null && !resOptions.isEmpty()) {
|
|
||||||
val st = StringTokenizer(resOptions, " ")
|
|
||||||
while (st.hasMoreTokens()) {
|
|
||||||
val token = st.nextToken()
|
|
||||||
if (token.startsWith("ndots:")) {
|
|
||||||
ndots = parseNdots(token.substring(6))
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
return ndots
|
|
||||||
}
|
|
||||||
|
|
||||||
private fun parseNdots(token: String): Int {
|
|
||||||
if (token.isNotEmpty()) {
|
|
||||||
try {
|
|
||||||
var ndots = token.toInt()
|
|
||||||
if (ndots >= 0) {
|
|
||||||
if (ndots > 15) {
|
|
||||||
// man resolv.conf:
|
|
||||||
// The value for this option is silently capped to 15
|
|
||||||
ndots = 15
|
|
||||||
}
|
|
||||||
return ndots
|
|
||||||
}
|
|
||||||
} catch (e: NumberFormatException) {
|
|
||||||
// ignore
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
return 1
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Find the index of the first non-white space character in `s` starting at `offset`.
|
|
||||||
*
|
|
||||||
* @param seq The string to search.
|
|
||||||
* @param offset The offset to start searching at.
|
|
||||||
* @return the index of the first non-white space character or <`-1` if none was found.
|
|
||||||
*/
|
|
||||||
private fun indexOfNonWhiteSpace(seq: CharSequence, offset: Int): Int {
|
|
||||||
var o = offset
|
|
||||||
while (o < seq.length) {
|
|
||||||
if (!Character.isWhitespace(seq[o])) {
|
|
||||||
return o
|
|
||||||
}
|
|
||||||
++o
|
|
||||||
}
|
|
||||||
return -1
|
|
||||||
}
|
|
||||||
|
|
||||||
private fun putIfAbsent(
|
|
||||||
nameServerDomains: MutableMap<String, List<InetSocketAddress>>,
|
|
||||||
domainName: String,
|
|
||||||
nameServer: InetSocketAddress
|
|
||||||
) {
|
|
||||||
var list = nameServerDomains[domainName]
|
|
||||||
if (list == null) {
|
|
||||||
list = mutableListOf()
|
|
||||||
nameServerDomains[domainName] = list
|
|
||||||
}
|
|
||||||
|
|
||||||
(list as MutableList)
|
|
||||||
if (!list.contains(nameServer)) {
|
|
||||||
list.add(nameServer)
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
private fun putIfAbsent(
|
|
||||||
nameServerDomains: MutableMap<String, List<InetSocketAddress>>,
|
|
||||||
domainName: String,
|
|
||||||
nameServers: List<InetSocketAddress>
|
|
||||||
) {
|
|
||||||
var list = nameServerDomains[domainName]
|
|
||||||
if (list == null) {
|
|
||||||
list = mutableListOf()
|
|
||||||
nameServerDomains[domainName] = list
|
|
||||||
}
|
|
||||||
|
|
||||||
(list as MutableList)
|
|
||||||
nameServers.forEach {
|
|
||||||
if (!list.contains(it)) {
|
|
||||||
list.add(it)
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
nameServers
|
|
||||||
}
|
|
||||||
}
|
}
|
||||||
|
|
|
@ -14,10 +14,10 @@
|
||||||
* License for the specific language governing permissions and limitations
|
* License for the specific language governing permissions and limitations
|
||||||
* under the License.
|
* under the License.
|
||||||
*/
|
*/
|
||||||
package dorkbox.netUtil.hosts
|
package dorkbox.netUtil.dnsUtils
|
||||||
|
|
||||||
import dorkbox.netUtil.Common.OS_WINDOWS
|
import dorkbox.netUtil.Common.OS_WINDOWS
|
||||||
import dorkbox.netUtil.hosts.HostsFileParser.parse
|
import dorkbox.netUtil.dnsUtils.HostsFileParser.parse
|
||||||
import java.net.InetAddress
|
import java.net.InetAddress
|
||||||
import java.nio.charset.Charset
|
import java.nio.charset.Charset
|
||||||
import java.nio.charset.StandardCharsets
|
import java.nio.charset.StandardCharsets
|
|
@ -14,7 +14,7 @@
|
||||||
* License for the specific language governing permissions and limitations
|
* License for the specific language governing permissions and limitations
|
||||||
* under the License.
|
* under the License.
|
||||||
*/
|
*/
|
||||||
package dorkbox.netUtil.hosts
|
package dorkbox.netUtil.dnsUtils
|
||||||
|
|
||||||
import java.net.Inet4Address
|
import java.net.Inet4Address
|
||||||
import java.net.Inet6Address
|
import java.net.Inet6Address
|
|
@ -14,7 +14,7 @@
|
||||||
* License for the specific language governing permissions and limitations
|
* License for the specific language governing permissions and limitations
|
||||||
* under the License.
|
* under the License.
|
||||||
*/
|
*/
|
||||||
package dorkbox.netUtil.hosts
|
package dorkbox.netUtil.dnsUtils
|
||||||
|
|
||||||
import dorkbox.netUtil.Common.OS_WINDOWS
|
import dorkbox.netUtil.Common.OS_WINDOWS
|
||||||
import dorkbox.netUtil.Common.logger
|
import dorkbox.netUtil.Common.logger
|
|
@ -0,0 +1,437 @@
|
||||||
|
package dorkbox.netUtil.dnsUtils
|
||||||
|
|
||||||
|
import com.sun.jna.Memory
|
||||||
|
import com.sun.jna.Pointer
|
||||||
|
import com.sun.jna.platform.win32.WinError
|
||||||
|
import dorkbox.netUtil.Common
|
||||||
|
import dorkbox.netUtil.Dns
|
||||||
|
import dorkbox.netUtil.IPv4
|
||||||
|
import dorkbox.netUtil.IPv6
|
||||||
|
import dorkbox.netUtil.jna.windows.IPHlpAPI
|
||||||
|
import dorkbox.netUtil.jna.windows.structs.IP_ADAPTER_ADDRESSES_LH
|
||||||
|
import dorkbox.netUtil.jna.windows.structs.IP_ADAPTER_DNS_SERVER_ADDRESS_XP
|
||||||
|
import java.io.*
|
||||||
|
import java.net.*
|
||||||
|
import java.nio.file.Files
|
||||||
|
import java.nio.file.Paths
|
||||||
|
import java.util.*
|
||||||
|
import javax.naming.Context
|
||||||
|
import javax.naming.NamingException
|
||||||
|
import javax.naming.directory.DirContext
|
||||||
|
import javax.naming.directory.InitialDirContext
|
||||||
|
|
||||||
|
/**
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
object ResolveConf {
|
||||||
|
private const val NAMESERVER_ROW_LABEL = "nameserver"
|
||||||
|
private const val DOMAIN_ROW_LABEL = "domain"
|
||||||
|
private const val PORT_ROW_LABEL = "port"
|
||||||
|
|
||||||
|
|
||||||
|
// largely from:
|
||||||
|
// https://github.com/dnsjava/dnsjava/blob/fb4889ee7a73f391f43bf6dc78b019d87ae15f15/src/main/java/org/xbill/DNS/config/BaseResolverConfigProvider.java#L22
|
||||||
|
internal fun getUnsortedNameServers(): Map<String, List<InetSocketAddress>> {
|
||||||
|
val nameServerDomains = mutableMapOf<String, List<InetSocketAddress>>()
|
||||||
|
|
||||||
|
// Using jndi-dns to obtain the default name servers.
|
||||||
|
//
|
||||||
|
// See:
|
||||||
|
// - http://docs.oracle.com/javase/8/docs/technotes/guides/jndi/jndi-dns.html
|
||||||
|
// - http://mail.openjdk.java.net/pipermail/net-dev/2017-March/010695.html
|
||||||
|
|
||||||
|
// Using jndi-dns to obtain the default name servers.
|
||||||
|
//
|
||||||
|
// See:
|
||||||
|
// - http://docs.oracle.com/javase/8/docs/technotes/guides/jndi/jndi-dns.html
|
||||||
|
// - http://mail.openjdk.java.net/pipermail/net-dev/2017-March/010695.html
|
||||||
|
val env = Hashtable<String, String>()
|
||||||
|
env[Context.INITIAL_CONTEXT_FACTORY] = "com.sun.jndi.dns.DnsContextFactory"
|
||||||
|
env["java.naming.provider.url"] = "dns://"
|
||||||
|
try {
|
||||||
|
val ctx: DirContext = InitialDirContext(env)
|
||||||
|
val dnsUrls = ctx.environment["java.naming.provider.url"] as String?
|
||||||
|
if (dnsUrls != null) {
|
||||||
|
val servers = dnsUrls.split(" ".toRegex()).toTypedArray()
|
||||||
|
|
||||||
|
for (server in servers) {
|
||||||
|
try {
|
||||||
|
putIfAbsent(nameServerDomains, Dns.DEFAULT_SEARCH_DOMAIN, Common.socketAddress(URI(server).host, 53))
|
||||||
|
} catch (e: URISyntaxException) {
|
||||||
|
Common.logger.debug("Skipping a malformed nameserver URI: {}", server, e)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
} catch (ignore: NamingException) {
|
||||||
|
// Will also try JNA/etc if this fails.
|
||||||
|
}
|
||||||
|
|
||||||
|
if (Common.OS_WINDOWS) {
|
||||||
|
// have to use JNA to access the WINDOWS resolver info
|
||||||
|
|
||||||
|
// modified from: https://github.com/dnsjava/dnsjava/blob/master/src/main/java/org/xbill/DNS/config/WindowsResolverConfigProvider.java
|
||||||
|
// The recommended method of calling the GetAdaptersAddresses function is to pre-allocate a 15KB working buffer
|
||||||
|
var buffer: Memory? = Memory(15 * 1024)
|
||||||
|
val size: com.sun.jna.ptr.IntByReference = com.sun.jna.ptr.IntByReference(0)
|
||||||
|
|
||||||
|
val flags: Int = IPHlpAPI.GAA_FLAG_SKIP_UNICAST or
|
||||||
|
IPHlpAPI.GAA_FLAG_SKIP_ANYCAST or
|
||||||
|
IPHlpAPI.GAA_FLAG_SKIP_MULTICAST or
|
||||||
|
IPHlpAPI.GAA_FLAG_SKIP_FRIENDLY_NAME
|
||||||
|
|
||||||
|
var error: Int = IPHlpAPI.GetAdaptersAddresses(
|
||||||
|
IPHlpAPI.AF_UNSPEC,
|
||||||
|
flags,
|
||||||
|
Pointer.NULL,
|
||||||
|
buffer,
|
||||||
|
size
|
||||||
|
)
|
||||||
|
|
||||||
|
if (error == WinError.ERROR_BUFFER_OVERFLOW) {
|
||||||
|
buffer = Memory(size.value.toLong())
|
||||||
|
error = IPHlpAPI.GetAdaptersAddresses(
|
||||||
|
IPHlpAPI.AF_UNSPEC,
|
||||||
|
flags,
|
||||||
|
Pointer.NULL,
|
||||||
|
buffer,
|
||||||
|
size
|
||||||
|
)
|
||||||
|
}
|
||||||
|
|
||||||
|
if (error == WinError.ERROR_SUCCESS) {
|
||||||
|
var result: IP_ADAPTER_ADDRESSES_LH? = IP_ADAPTER_ADDRESSES_LH(buffer)
|
||||||
|
while (result != null) {
|
||||||
|
|
||||||
|
// only interfaces with IfOperStatusUp
|
||||||
|
if (result.OperStatus == 1) {
|
||||||
|
var dns: IP_ADAPTER_DNS_SERVER_ADDRESS_XP? = result.FirstDnsServerAddress
|
||||||
|
while (dns != null) {
|
||||||
|
|
||||||
|
var address: InetAddress
|
||||||
|
try {
|
||||||
|
address = dns.Address.toAddress()
|
||||||
|
if (address is Inet4Address || !address.isSiteLocalAddress) {
|
||||||
|
|
||||||
|
putIfAbsent(nameServerDomains, Dns.DEFAULT_SEARCH_DOMAIN, Common.socketAddress(address, 53))
|
||||||
|
} else {
|
||||||
|
Common.logger.debug(
|
||||||
|
"Skipped site-local IPv6 server address {} on adapter index {}",
|
||||||
|
address,
|
||||||
|
result.IfIndex
|
||||||
|
)
|
||||||
|
}
|
||||||
|
} catch (e: UnknownHostException) {
|
||||||
|
Common.logger.warn("Invalid nameserver address on adapter index {}", result.IfIndex, e)
|
||||||
|
}
|
||||||
|
dns = dns.Next
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
result = result.Next
|
||||||
|
}
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
// try resolve.conf
|
||||||
|
|
||||||
|
// first try the default unix config path
|
||||||
|
var tryParse = tryParseResolvConfNameservers("/etc/resolv.conf")
|
||||||
|
if (!tryParse.first) {
|
||||||
|
// then fallback to netware
|
||||||
|
tryParse = tryParseResolvConfNameservers("sys:/etc/resolv.cfg")
|
||||||
|
}
|
||||||
|
|
||||||
|
if (tryParse.first) {
|
||||||
|
// we can have DIFFERENT name servers for DIFFERENT domains!
|
||||||
|
tryParse.second
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// if we STILL don't have anything, add global nameservers to the default search domain
|
||||||
|
if (nameServerDomains[Dns.DEFAULT_SEARCH_DOMAIN] == null) {
|
||||||
|
putIfAbsent(nameServerDomains, Dns.DEFAULT_SEARCH_DOMAIN, Common.socketAddress("1.1.1.1", 53)) // cloudflare
|
||||||
|
putIfAbsent(nameServerDomains, Dns.DEFAULT_SEARCH_DOMAIN, Common.socketAddress("1.1.1.1", 53)) // google
|
||||||
|
}
|
||||||
|
|
||||||
|
return nameServerDomains
|
||||||
|
}
|
||||||
|
|
||||||
|
private fun tryParseResolvConfNameservers(path: String): Pair<Boolean, Map<String, List<InetSocketAddress>>> {
|
||||||
|
val p = Paths.get(path)
|
||||||
|
if (Files.exists(p)) {
|
||||||
|
try {
|
||||||
|
FileReader(path).use { fr ->
|
||||||
|
BufferedReader(fr).use { br ->
|
||||||
|
var nameServers = mutableListOf<InetSocketAddress>()
|
||||||
|
val nameServerDomains = mutableMapOf<String, List<InetSocketAddress>>()
|
||||||
|
|
||||||
|
var domainName = Dns.DEFAULT_SEARCH_DOMAIN
|
||||||
|
var port = 53
|
||||||
|
var line0: String?
|
||||||
|
loop@ while (br.readLine().also { line0 = it?.trim() } != null) {
|
||||||
|
val line = line0!!
|
||||||
|
|
||||||
|
if (line.isEmpty()) {
|
||||||
|
continue@loop
|
||||||
|
}
|
||||||
|
|
||||||
|
val c = line[0]
|
||||||
|
if (c == '#' || c == ';') {
|
||||||
|
continue
|
||||||
|
}
|
||||||
|
|
||||||
|
if (line.startsWith(NAMESERVER_ROW_LABEL)) {
|
||||||
|
var i = indexOfNonWhiteSpace(line, NAMESERVER_ROW_LABEL.length)
|
||||||
|
require(i < 0) {
|
||||||
|
"error parsing label ${NAMESERVER_ROW_LABEL} in file $path. value: $line"
|
||||||
|
}
|
||||||
|
|
||||||
|
var maybeIP = line.substring(i)
|
||||||
|
// There may be a port appended onto the IP address so we attempt to extract it.
|
||||||
|
|
||||||
|
// There may be a port appended onto the IP address so we attempt to extract it.
|
||||||
|
if (!IPv4.isValid(maybeIP) && !IPv6.isValid(maybeIP)) {
|
||||||
|
i = maybeIP.lastIndexOf('.')
|
||||||
|
require(i + 1 >= maybeIP.length) {
|
||||||
|
"error parsing label ${NAMESERVER_ROW_LABEL} in file $path. invalid IP value: $line"
|
||||||
|
}
|
||||||
|
|
||||||
|
port = maybeIP.substring(i + 1).toInt()
|
||||||
|
maybeIP = maybeIP.substring(0, i)
|
||||||
|
}
|
||||||
|
|
||||||
|
nameServers.add(Common.socketAddress(maybeIP, port))
|
||||||
|
} else if (line.startsWith(DOMAIN_ROW_LABEL)) {
|
||||||
|
// nameservers can be SPECIFIC to a search domain
|
||||||
|
val i = indexOfNonWhiteSpace(line, DOMAIN_ROW_LABEL.length)
|
||||||
|
require(i >= 0) {
|
||||||
|
"error parsing label ${DOMAIN_ROW_LABEL} in file $path value: $line"
|
||||||
|
}
|
||||||
|
|
||||||
|
// we have a NEW domain! add the PREVIOUS nameServers and start again.
|
||||||
|
putIfAbsent(nameServerDomains, domainName, nameServers)
|
||||||
|
|
||||||
|
nameServers = mutableListOf()
|
||||||
|
domainName = line.substring(i)
|
||||||
|
} else if (line.startsWith(PORT_ROW_LABEL)) {
|
||||||
|
val i = indexOfNonWhiteSpace(line, PORT_ROW_LABEL.length)
|
||||||
|
require(i < 0) {
|
||||||
|
"error parsing label ${PORT_ROW_LABEL} in file $path value: $line"
|
||||||
|
}
|
||||||
|
|
||||||
|
port = line.substring(i).toInt()
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// when done parsing the file, ALWAYS add the nameServer domains (since they have not been added yet)
|
||||||
|
putIfAbsent(nameServerDomains, domainName, nameServers)
|
||||||
|
return Pair(true, nameServerDomains)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
} catch (e: IOException) {
|
||||||
|
Common.logger.error("Error parsing $path", e)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return Pair(false, mutableMapOf())
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Find the index of the first non-white space character in `s` starting at `offset`.
|
||||||
|
*
|
||||||
|
* @param seq The string to search.
|
||||||
|
* @param offset The offset to start searching at.
|
||||||
|
* @return the index of the first non-white space character or <`-1` if none was found.
|
||||||
|
*/
|
||||||
|
private fun indexOfNonWhiteSpace(seq: CharSequence, offset: Int): Int {
|
||||||
|
var o = offset
|
||||||
|
while (o < seq.length) {
|
||||||
|
if (!Character.isWhitespace(seq[o])) {
|
||||||
|
return o
|
||||||
|
}
|
||||||
|
++o
|
||||||
|
}
|
||||||
|
return -1
|
||||||
|
}
|
||||||
|
|
||||||
|
private fun putIfAbsent(
|
||||||
|
nameServerDomains: MutableMap<String, List<InetSocketAddress>>,
|
||||||
|
domainName: String,
|
||||||
|
nameServer: InetSocketAddress
|
||||||
|
) {
|
||||||
|
var list = nameServerDomains[domainName]
|
||||||
|
if (list == null) {
|
||||||
|
list = mutableListOf()
|
||||||
|
nameServerDomains[domainName] = list
|
||||||
|
}
|
||||||
|
|
||||||
|
(list as MutableList)
|
||||||
|
if (!list.contains(nameServer)) {
|
||||||
|
list.add(nameServer)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
private fun putIfAbsent(
|
||||||
|
nameServerDomains: MutableMap<String, List<InetSocketAddress>>,
|
||||||
|
domainName: String,
|
||||||
|
nameServers: List<InetSocketAddress>
|
||||||
|
) {
|
||||||
|
var list = nameServerDomains[domainName]
|
||||||
|
if (list == null) {
|
||||||
|
list = mutableListOf()
|
||||||
|
nameServerDomains[domainName] = list
|
||||||
|
}
|
||||||
|
|
||||||
|
(list as MutableList)
|
||||||
|
nameServers.forEach {
|
||||||
|
if (!list.contains(it)) {
|
||||||
|
list.add(it)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
nameServers
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
internal fun tryParseResolvConfNDots(path: String): Pair<Boolean, Int> {
|
||||||
|
val p = Paths.get(path)
|
||||||
|
if (Files.exists(p)) {
|
||||||
|
try {
|
||||||
|
Files.newInputStream(p).use { `in` ->
|
||||||
|
return Pair(true, getNdots(`in`))
|
||||||
|
}
|
||||||
|
} catch (e: IOException) {
|
||||||
|
// ignore
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return Pair(false, 1)
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
// @kotlin.jvm.Throws(IOException::class)
|
||||||
|
// private fun parseResolvConf(`in`: InputStream) {
|
||||||
|
// InputStreamReader(`in`).use { isr ->
|
||||||
|
// BufferedReader(isr).use { br ->
|
||||||
|
//
|
||||||
|
// var line: String?
|
||||||
|
// loop@ while (br.readLine().also { line = it } != null) {
|
||||||
|
// val st = StringTokenizer(line)
|
||||||
|
// if (!st.hasMoreTokens()) {
|
||||||
|
// continue
|
||||||
|
// }
|
||||||
|
// when (st.nextToken()) {
|
||||||
|
// "domain" -> {
|
||||||
|
// // man resolv.conf:
|
||||||
|
// // The domain and search keywords are mutually exclusive. If more than one instance of
|
||||||
|
// // these keywords is present, the last instance wins.
|
||||||
|
// searchlist.clear()
|
||||||
|
// if (!st.hasMoreTokens()) {
|
||||||
|
// continue@loop
|
||||||
|
// }
|
||||||
|
// addSearchPath(st.nextToken())
|
||||||
|
// }
|
||||||
|
// "search" -> {
|
||||||
|
// // man resolv.conf:
|
||||||
|
// // The domain and search keywords are mutually exclusive. If more than one instance of
|
||||||
|
// // these keywords is present, the last instance wins.
|
||||||
|
// searchlist.clear()
|
||||||
|
// while (st.hasMoreTokens()) {
|
||||||
|
// addSearchPath(st.nextToken())
|
||||||
|
// }
|
||||||
|
// }
|
||||||
|
// }
|
||||||
|
// }
|
||||||
|
// }
|
||||||
|
// }
|
||||||
|
//
|
||||||
|
// // man resolv.conf:
|
||||||
|
// // The search keyword of a system's resolv.conf file can be overridden on a per-process basis by
|
||||||
|
// // setting the environment variable LOCALDOMAIN to a space-separated list of search domains.
|
||||||
|
// val localdomain = System.getenv("LOCALDOMAIN")
|
||||||
|
// if (localdomain != null && !localdomain.isEmpty()) {
|
||||||
|
// searchlist.clear()
|
||||||
|
// parseSearchPathList(localdomain, " ")
|
||||||
|
// }
|
||||||
|
// }
|
||||||
|
|
||||||
|
private fun getNdots(`in`: InputStream): Int {
|
||||||
|
var ndots = 1
|
||||||
|
|
||||||
|
InputStreamReader(`in`).use { isr ->
|
||||||
|
BufferedReader(isr).use { br ->
|
||||||
|
var line: String?
|
||||||
|
loop@ while (br.readLine().also { line = it } != null) {
|
||||||
|
val st = StringTokenizer(line)
|
||||||
|
if (!st.hasMoreTokens()) {
|
||||||
|
continue
|
||||||
|
}
|
||||||
|
|
||||||
|
when (st.nextToken()) {
|
||||||
|
"domain" -> {
|
||||||
|
// man resolv.conf:
|
||||||
|
// The domain and search keywords are mutually exclusive. If more than one instance of
|
||||||
|
// these keywords is present, the last instance wins.
|
||||||
|
if (!st.hasMoreTokens()) {
|
||||||
|
continue@loop
|
||||||
|
}
|
||||||
|
}
|
||||||
|
"search" -> {
|
||||||
|
// man resolv.conf:
|
||||||
|
// The domain and search keywords are mutually exclusive. If more than one instance of
|
||||||
|
// these keywords is present, the last instance wins.
|
||||||
|
while (st.hasMoreTokens()) {
|
||||||
|
val token = st.nextToken()
|
||||||
|
if (token.startsWith("ndots:")) {
|
||||||
|
ndots = parseNdots(token.substring(6))
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
"options" -> while (st.hasMoreTokens()) {
|
||||||
|
val token = st.nextToken()
|
||||||
|
if (token.startsWith("ndots:")) {
|
||||||
|
ndots = parseNdots(token.substring(6))
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// man resolv.conf:
|
||||||
|
// The options keyword of a system's resolv.conf file can be amended on a per-process basis by
|
||||||
|
// setting the environment variable RES_OPTIONS to a space-separated list of resolver options as
|
||||||
|
// explained above under options.
|
||||||
|
val resOptions = System.getenv("RES_OPTIONS")
|
||||||
|
if (resOptions != null && !resOptions.isEmpty()) {
|
||||||
|
val st = StringTokenizer(resOptions, " ")
|
||||||
|
while (st.hasMoreTokens()) {
|
||||||
|
val token = st.nextToken()
|
||||||
|
if (token.startsWith("ndots:")) {
|
||||||
|
ndots = parseNdots(token.substring(6))
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return ndots
|
||||||
|
}
|
||||||
|
|
||||||
|
private fun parseNdots(token: String): Int {
|
||||||
|
if (token.isNotEmpty()) {
|
||||||
|
try {
|
||||||
|
var ndots = token.toInt()
|
||||||
|
if (ndots >= 0) {
|
||||||
|
if (ndots > 15) {
|
||||||
|
// man resolv.conf:
|
||||||
|
// The value for this option is silently capped to 15
|
||||||
|
ndots = 15
|
||||||
|
}
|
||||||
|
return ndots
|
||||||
|
}
|
||||||
|
} catch (e: NumberFormatException) {
|
||||||
|
// ignore
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return 1
|
||||||
|
}
|
||||||
|
}
|
|
@ -14,7 +14,7 @@
|
||||||
* License for the specific language governing permissions and limitations
|
* License for the specific language governing permissions and limitations
|
||||||
* under the License.
|
* under the License.
|
||||||
*/
|
*/
|
||||||
package dorkbox.netUtil.hosts
|
package dorkbox.netUtil.dnsUtils
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* Defined resolved address types.
|
* Defined resolved address types.
|
Loading…
Reference in New Issue