// dnsResolve(host) javascript implementation
static
bool PACDnsResolve(JSContext *cx, unsigned int argc, JS::Value *vp)
{
JS::CallArgs args = CallArgsFromVp(argc, vp);
if (NS_IsMainThread()) {
NS_WARNING("DNS Resolution From PAC on Main Thread. How did that happen?");
return false;
}
JS::Rooted<JSString*> arg1(cx);
if (!JS_ConvertArguments(cx, args, "S", arg1.address()))
return false;
nsDependentJSString hostName;
nsAutoCString dottedDecimal;
if (!hostName.init(cx, arg1))
return false;
if (PACResolveToString(NS_ConvertUTF16toUTF8(hostName), dottedDecimal, 0)) {
JSString *dottedDecimalString = JS_NewStringCopyZ(cx, dottedDecimal.get());
args.rval().setString(dottedDecimalString);
}
else {
args.rval().setNull();
}
return true;
}
// dnsResolve(host) javascript implementation
static
JSBool PACDnsResolve(JSContext *cx, unsigned int argc, jsval *vp)
{
if (NS_IsMainThread()) {
NS_WARNING("DNS Resolution From PAC on Main Thread. How did that happen?");
return false;
}
JSString *arg1 = nullptr;
if (!JS_ConvertArguments(cx, argc, JS_ARGV(cx, vp), "S", &arg1))
return false;
nsDependentJSString hostName;
nsAutoCString dottedDecimal;
if (!hostName.init(cx, arg1))
return false;
if (PACResolveToString(NS_ConvertUTF16toUTF8(hostName), dottedDecimal, 0)) {
JSString *dottedDecimalString = JS_NewStringCopyZ(cx, dottedDecimal.get());
JS_SET_RVAL(cx, vp, STRING_TO_JSVAL(dottedDecimalString));
}
else {
JS_SET_RVAL(cx, vp, JSVAL_NULL);
}
return true;
}
bool
ProxyAutoConfig::MyIPAddress(JS::Value *vp)
{
nsAutoCString remoteDottedDecimal;
nsAutoCString localDottedDecimal;
JSContext *cx = mJSRuntime->Context();
// first, lookup the local address of a socket connected
// to the host of uri being resolved by the pac file. This is
// v6 safe.. but is the last step like that
if (MyIPAddressTryHost(mRunningHost, kTimeout, vp))
return true;
// next, look for a route to a public internet address that doesn't need DNS.
// This is the google anycast dns address, but it doesn't matter if it
// remains operable (as we don't contact it) as long as the address stays
// in commonly routed IP address space.
remoteDottedDecimal.AssignLiteral("8.8.8.8");
if (MyIPAddressTryHost(remoteDottedDecimal, 0, vp))
return true;
// next, use the old algorithm based on the local hostname
nsAutoCString hostName;
nsCOMPtr<nsIDNSService> dns = do_GetService(NS_DNSSERVICE_CONTRACTID);
if (dns && NS_SUCCEEDED(dns->GetMyHostName(hostName)) &&
PACResolveToString(hostName, localDottedDecimal, kTimeout)) {
JSString *dottedDecimalString =
JS_NewStringCopyZ(cx, localDottedDecimal.get());
JS_SET_RVAL(cx, vp, STRING_TO_JSVAL(dottedDecimalString));
return true;
}
// next try a couple RFC 1918 variants.. maybe there is a
// local route
remoteDottedDecimal.AssignLiteral("192.168.0.1");
if (MyIPAddressTryHost(remoteDottedDecimal, 0, vp))
return true;
// more RFC 1918
remoteDottedDecimal.AssignLiteral("10.0.0.1");
if (MyIPAddressTryHost(remoteDottedDecimal, 0, vp))
return true;
// who knows? let's fallback to localhost
localDottedDecimal.AssignLiteral("127.0.0.1");
JSString *dottedDecimalString =
JS_NewStringCopyZ(cx, localDottedDecimal.get());
JS_SET_RVAL(cx, vp, STRING_TO_JSVAL(dottedDecimalString));
return true;
}
