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package com.vauth.foxyvpn.data
import okhttp3.Cookie
import okhttp3.CookieJar
import okhttp3.HttpUrl
import okhttp3.OkHttpClient
import okhttp3.Request
import java.net.InetAddress
import java.net.InetSocketAddress
import java.net.Socket
import java.util.concurrent.ConcurrentHashMap
import java.util.concurrent.TimeUnit
import javax.net.SocketFactory
private const val TAG = "ControlPlaneHttp"
const val MOZILLA_VPN_USER_AGENT = "MozillaVPN/2.35.0 (sys:linux; iap:true)"
fun Request.Builder.applyMozillaVpnHeaders(): Request.Builder {
header("User-Agent", MOZILLA_VPN_USER_AGENT)
header("Accept", "application/json")
return this
}
class SimpleCookieJar : CookieJar {
private val byDomain = ConcurrentHashMap<String, MutableList<Cookie>>()
override fun saveFromResponse(url: HttpUrl, cookies: List<Cookie>) {
for (cookie in cookies) {
val bucket = byDomain.getOrPut(cookie.domain) { mutableListOf() }
synchronized(bucket) {
bucket.removeAll { it.name == cookie.name }
bucket.add(cookie)
}
}
}
override fun loadForRequest(url: HttpUrl): List<Cookie> {
val now = System.currentTimeMillis()
val result = mutableListOf<Cookie>()
for ((domain, cookies) in byDomain) {
if (url.host == domain || url.host.endsWith(".$domain")) {
synchronized(cookies) {
result.addAll(cookies.filter { it.expiresAt > now })
}
}
}
return result
}
fun set(name: String, value: String, domain: String) {
val bucket = byDomain.getOrPut(domain) { mutableListOf() }
synchronized(bucket) {
bucket.removeAll { it.name == name }
bucket.add(
Cookie.Builder()
.name(name)
.value(value)
.domain(domain)
.path("/")
.expiresAt(Long.MAX_VALUE)
.build(),
)
}
}
fun snapshotAll(): List<Cookie> = byDomain.values.flatten()
}
private class ProtectingSocketFactory : SocketFactory() {
private fun protect(socket: Socket, localAddress: InetSocketAddress?): Socket {
runCatching {
if (!socket.isBound) socket.bind(localAddress ?: InetSocketAddress(0))
}.onFailure {
AppLogger.w(TAG, "could not bind a control-plane socket before protecting it", it)
}
val protector = ControlPlaneHttp.socketProtector
if (protector != null) {
val protectedOk = runCatching { protector.invoke(socket) }.getOrDefault(false)
if (!protectedOk) {
AppLogger.w(
TAG,
"VpnService.protect() refused a control-plane socket; this request would be routed " +
"back into the tunnel instead of out to the network",
)
}
}
return socket
}
override fun createSocket(): Socket = protect(Socket(), null)
override fun createSocket(host: String, port: Int): Socket =
protect(Socket(), null).apply { connect(InetSocketAddress(host, port)) }
override fun createSocket(host: String, port: Int, localAddr: InetAddress, localPort: Int): Socket =
protect(Socket(), InetSocketAddress(localAddr, localPort))
.apply { connect(InetSocketAddress(host, port)) }
override fun createSocket(host: InetAddress, port: Int): Socket =
protect(Socket(), null).apply { connect(InetSocketAddress(host, port)) }
override fun createSocket(host: InetAddress, port: Int, localAddr: InetAddress, localPort: Int): Socket =
protect(Socket(), InetSocketAddress(localAddr, localPort))
.apply { connect(InetSocketAddress(host, port)) }
}
object ControlPlaneHttp {
val cookieJar = SimpleCookieJar()
@Volatile
var socketProtector: ((Socket) -> Boolean)? = null
val client: OkHttpClient by lazy {
OkHttpClient.Builder()
.cookieJar(cookieJar)
.socketFactory(ProtectingSocketFactory())
.connectTimeout(30, TimeUnit.SECONDS)
.readTimeout(30, TimeUnit.SECONDS)
.callTimeout(30, TimeUnit.SECONDS)
.build()
}
}
arblant