Commit build files of tailscale_tun

tun/index.js

@@ -0,0 +1,29 @@
+import { init } from "./tailscale_tun.js";
+import { showPeers, showLoginURL } from "./ui.js";
+
+const { loginURL, ipStack } = await init({ netMapCallback: showPeers });
+showLoginURL(loginURL);
+const { connect, parseIP } = await ipStack;
+
+async function testTcp()
+{
+  let p = await connect(parseIP("100.84.181.36"), 6666);
+  if (!p)
+  throw "cannot connect";
+  p.onmessage = (ev) => {
+  let str = "";
+  if (ev.data == null)
+    str = "CLOSED";
+  else
+  {
+    let decoder = new TextDecoder();
+    str = decoder.decode(ev.data)
+  }
+  console.log("received", str);
+  };
+  let encoder = new TextEncoder();
+  let data = encoder.encode("hi from browser");
+  p.postMessage(data, [data.buffer]);
+}
+
+testTcp();

tun/ipstack.js

@@ -0,0 +1,865 @@
+"use strict";
+/*Compiled using Cheerp (R) by Leaning Technologies Ltd*/
+var __imul=Math.imul;
+var __fround=Math.fround;
+var oSlot=0;var nullArray=[null];var nullObj={d:nullArray,o:0};
+function fetchBuffer(p){
+	return (typeof fetch==='function')?
+	fetch(p).then(r=>r.arrayBuffer()):
+	new Promise((y,n)=>{
+		import('fs').then(r=>r.readFile(p,(e,d)=>{
+			if(e)n(e);
+			else y(d);
+		}));
+	});
+}
+function ___cxx_global_var_init$p3(){
+	__ZN7IpStackL7chanMapE=_cheerpCreate_ZN6client4TMapIiPNS_14MessageChannelEEC2Ev();
+}
+function ___cxx_global_var_init$p4(){
+	__ZN7IpStackL11listenerMapE=_cheerpCreate_ZN6client4TMapIiPNS_13EventListenerEEC2Ev();
+}
+function _cheerpCreate_ZN6client4TMapIiPNS_13EventListenerEEC2Ev(){
+	return new Map();
+}
+function _cheerpCreate_ZN6client4TMapIiPNS_14MessageChannelEEC2Ev(){
+	return new Map();
+}
+function __Z13createPromisev(Lagg$presult){
+	var LretConstructor=null,LretConstructor7=null;
+	LretConstructor=_cheerpCreate_ZN6client9CheerpRefINS_13EventListenerEEC2Ev();
+	LretConstructor7=_cheerpCreate_ZN6client9CheerpRefINS_13EventListenerEEC2Ev();
+	Lagg$presult.a0=new Promise(function(__f,__r){LretConstructor.inner=__f;LretConstructor7.inner=__r;});;
+	Lagg$presult.a1=LretConstructor.inner;
+	Lagg$presult.a2=LretConstructor7.inner;
+}
+function _cheerpCreate_ZN6client9CheerpRefINS_13EventListenerEEC2Ev(){
+	return new Object();
+}
+function _sys_now(){
+	return ~~ +performance.now()|0;
+}
+function __Z9output_jsPhi(Lbuf,Mbuf,Llen){
+	var LretConstructor=null;
+	LretConstructor=new Uint8Array((+(Llen|0)));
+	LretConstructor.set(__ZN6cheerp14MakeTypedArrayIhN6client10Uint8ArrayEEEPT0_PKT_j(Lbuf,Mbuf,Llen));
+	__ZL9output_cb(LretConstructor);
+}
+function __ZN6cheerp14MakeTypedArrayIhN6client10Uint8ArrayEEEPT0_PKT_j(Lptr,Mptr,Lsize){
+	var tmp0=0,tmp1=null;
+	tmp0=Mptr;
+	tmp1=Lptr;
+	tmp1=tmp1;
+	if((Lsize|0)!==0){
+		if((tmp0|0)===0)if( +tmp1.length===(+(Lsize>>>0)))return tmp1;
+		return tmp1.subarray((+(tmp0>>>0)),(+(tmp0+Lsize>>>0)));
+	}
+	if((tmp0|0)===0)return tmp1;
+	return tmp1.subarray((+(tmp0>>>0)));
+}
+function __Z14start_timeoutsv(){
+	+setInterval(__ZN6cheerp8CallbackIZ14start_timeoutsvE3$_0EEPN6client13EventListenerEOT_(),100);
+}
+function __ZN6cheerp8CallbackIZ14start_timeoutsvE3$_0EEPN6client13EventListenerEOT_(){
+	var Lref$ptmp=null,Lcall1=null;
+	Lref$ptmp={a0:null,a1:null,a2:null};
+	__ZN6cheerp12make_closureIZ14start_timeoutsvE3$_0EEDTclsr13ClosureHelperIT_DTadsr3std16remove_referenceIS2_E4typeEonclEEE12make_closureclgssr6cheerpE7forwardIS2_Efp_EEEOS2_(Lref$ptmp);
+	Lcall1=__ZN6cheerp7ClosureIFvvEEcvPN6client13EventListenerEEv(Lref$ptmp);
+	__ZN6cheerp7ClosureIFvvEED2Ev(Lref$ptmp);
+	return Lcall1;
+}
+function __ZN6cheerp12make_closureIZ14start_timeoutsvE3$_0EEDTclsr13ClosureHelperIT_DTadsr3std16remove_referenceIS2_E4typeEonclEEE12make_closureclgssr6cheerpE7forwardIS2_Efp_EEEOS2_(Lagg$presult){
+	__ZN6cheerp13ClosureHelperIZ14start_timeoutsvE3$_0MS1_KFvvEE12make_closureEOS1_(Lagg$presult);
+}
+function __ZN6cheerp7ClosureIFvvEEcvPN6client13EventListenerEEv(Lthis){
+	var tmp0=null;
+	if(Lthis.a1!==null){
+		tmp0=[{a0:null,a1:null}];
+		tmp0[0].a0=Lthis.a1;
+		tmp0[0].a1=Lthis.a2;
+		tmp0=cheerpCreateClosure(__ZN6cheerp7ClosureIFvvEE14deleter_helperEPNS2_13DeleterHelperE,tmp0[0]);
+		__ZN6cheerp20EscapedResourcesListIN6client13EventListenerEE3addEPS2_PNS1_6ObjectE(Lthis.a0,tmp0);
+		Lthis.a1=null;
+	}
+	return Lthis.a0;
+}
+function __ZN6cheerp7ClosureIFvvEED2Ev(Lthis){
+	var tmp0=null;
+	tmp0=Lthis.a1;
+	if(tmp0!==null)tmp0(Lthis.a2);
+}
+function __ZN6cheerp7ClosureIFvvEE14deleter_helperEPNS2_13DeleterHelperE(Lh){
+	Lh.a0(Lh.a1);
+}
+function __ZN6cheerp20EscapedResourcesListIN6client13EventListenerEE3addEPS2_PNS1_6ObjectE(Lr,Ld){
+	if(__ZN6cheerp20EscapedResourcesListIN6client13EventListenerEE9resourcesE===null)__ZN6cheerp20EscapedResourcesListIN6client13EventListenerEE9resourcesE=new Map();
+	__ZN6cheerp20EscapedResourcesListIN6client13EventListenerEE9resourcesE.set(Lr,Ld);
+}
+function __ZN6cheerp13ClosureHelperIZ14start_timeoutsvE3$_0MS1_KFvvEE12make_closureEOS1_(Lagg$presult){
+	__ZN6cheerp7ClosureIFvvEEC2IZ14start_timeoutsvE3$_0EET_PNSt9enable_ifIXsr3std14is_convertibleIS5_PS1_EE5valueEvE4typeE(Lagg$presult);
+}
+function __ZN6cheerp7ClosureIFvvEEC2IZ14start_timeoutsvE3$_0EET_PNSt9enable_ifIXsr3std14is_convertibleIS5_PS1_EE5valueEvE4typeE(Lthis){
+	var tmp0=null;
+	tmp0=__ZZ14start_timeoutsvEN3$_08__invokeEv;
+	Lthis.a0=tmp0;
+	Lthis.a1=null;
+	Lthis.a2=null;
+}
+function __ZZ14start_timeoutsvEN3$_08__invokeEv(){
+	__ZZ14start_timeoutsvENK3$_0clEv();
+}
+function __ZZ14start_timeoutsvENK3$_0clEv(){
+	_sys_check_timeouts();
+}
+function __ZN7IpStack4initEPN6client9UpOptionsE(Lopts){
+	__Z4initv();
+	__Z16udpecho_raw_initv();
+	__Z16tcpecho_raw_initv();
+}
+function __ZN7IpStack2upEPN6client9UpOptionsE(Lopts){
+	var LsavedStack=null,tmp1=null,Lip=0,LipMapStr=0,Lcall1=null,Lcall2=null,Lref$ptmp7=0,Lref$ptmp8=0,Lcall6=null,Li$p03=0,Lcall5=null,Lcall5o=0;
+	LsavedStack=___getStackPtr();
+	tmp1=-80+LsavedStack|0;
+	___setStackPtr(tmp1);
+	Lip=64+tmp1|0;
+	__ZNK6client6StringcvSsEv(Lip,Lopts.localIp);
+	LipMapStr=40+tmp1|0;
+	__ZNSt13unordered_mapISsSsSt4hashISsESt8equal_toISsESaISt4pairIKSsSsEEEC2Ev(LipMapStr);
+	Lcall1=Lopts.ipMap;
+	if(Lcall1!==undefined){
+		Lcall2=Object.keys(Lcall1);
+		if(((Lcall2.length)|0)>0){
+			Lref$ptmp7=24+tmp1|0;
+			Lref$ptmp8=8+tmp1|0;
+			Li$p03=0;
+			while(1){
+				Lcall5=__ZN6client5ArrayixEi(Lcall2,Li$p03);
+				Lcall5o=oSlot;
+				Lcall5=Lcall5[Lcall5o];
+				Lcall6=Lcall1[Lcall5];
+				__ZNK6client6StringcvSsEv(Lref$ptmp7,Lcall5);
+				__ZNK6client6StringcvSsEv(Lref$ptmp8,Lcall6);
+				__ZNSt13unordered_mapISsSsSt4hashISsESt8equal_toISsESaISt4pairIKSsSsEEE7emplaceIJSsSsEEES4_ISt19__hash_map_iteratorISt15__hash_iteratorIPSt11__hash_nodeISt17__hash_value_typeISsSsEPvEEEbEDpOT_(tmp1|0,LipMapStr,Lref$ptmp7,Lref$ptmp8);
+				__ZNSsD2Ev(Lref$ptmp8);
+				__ZNSsD2Ev(Lref$ptmp7);
+				Li$p03=Li$p03+1|0;
+				if((Li$p03|0)<((Lcall2.length)|0))continue;
+				break;
+			}
+		}
+	}
+	__Z2upRKSsRKSt13unordered_mapISsSsSt4hashISsESt8equal_toISsESaISt4pairIS_SsEEE(Lip,LipMapStr);
+	__ZNSt13unordered_mapISsSsSt4hashISsESt8equal_toISsESaISt4pairIKSsSsEEED2Ev(LipMapStr);
+	__ZNSsD2Ev(Lip);
+	___setStackPtr(LsavedStack);
+}
+function __ZNK6client6StringcvSsEv(Lagg$presult,Lthis){
+	var Lcall2=null,Lcall2o=0,Li$p03=0;
+	__ZNSsC2Ev(Lagg$presult|0);
+	__ZNSs6resizeEj(Lagg$presult|0,Lthis.length);
+	Lcall2=HEAP8;
+	Lcall2o=__ZNSsixEj_icf(Lagg$presult|0)|0;
+	if(((Lthis.length)|0)>0){
+		Li$p03=0;
+		while(1){
+			Lcall2[Lcall2o+Li$p03|0]=Lthis.charCodeAt(Li$p03);
+			Li$p03=Li$p03+1|0;
+			if((Li$p03|0)<((Lthis.length)|0))continue;
+			break;
+		}
+	}
+}
+function __ZN6client5ArrayixEi(Lthis,Lindex){
+	oSlot=0+Lindex|0;
+	return Lthis;
+}
+function __ZN7IpStack4downEv(){
+	__Z4downv();
+}
+function __ZN7IpStack5inputEPN6client10Uint8ArrayE(Lpkt){
+	var LsavedStack=null,Ldata=0,Lcall1=null,Lcall1o=0,Lconv=0;
+	LsavedStack=___getStackPtr();
+	Lcall1=-16+LsavedStack|0;
+	___setStackPtr(Lcall1);
+	Lconv=~~ +Lpkt.length;
+	Ldata=Lcall1|0;
+	__ZNSt6vectorIhSaIhEEC2Ej(Ldata,Lconv);
+	Lcall1=HEAP8;
+	Lcall1o=__ZNSt6vectorIhSaIhEEixEj(Ldata,0)|0;
+	__ZN6cheerp14MakeTypedArrayIhN6client10Uint8ArrayEEEPT0_PKT_j(Lcall1,Lcall1o,Lconv).set(Lpkt);
+	Lconv=_pbuf_alloc(0,Lconv,386)|0;
+	if((Lconv|0)!=(0|0))__Z22copy_to_pbuf_and_inputP4pbufRKSt6vectorIhSaIhEE(Lconv,Ldata);
+	__ZNSt6vectorIhSaIhEED2Ev(Ldata);
+	___setStackPtr(LsavedStack);
+}
+function __ZN7IpStack6outputEPFvPN6client10Uint8ArrayEE(Lcallback){
+	__ZL9output_cb=Lcallback;
+}
+function __ZN7IpStack11recvAdapterEPN3tcp6SocketEPhj(Ls,Ldata,Mdata,Llen){
+	var Lcall1=null;
+	Lcall1=__ZN6client4TMapIiPNS_14MessageChannelEE3getEi(__ZN7IpStackL7chanMapE,((Ls|0)|0)).port2;
+	if(__ZN7IpStack10isWasmNullIhEEbPT_(Ldata,Mdata)|0){
+		console.warn(_cheerpCreate_ZN6client6StringC2EPKc(HEAP8,1052568>>0));
+		__ZN3tcp6Socket5closeEv(Ls|0);
+		__ZN3tcp6SocketD2Ev(Ls|0);
+		_free(Ls|0);
+		Lcall1.postMessage(null);
+		return;
+	}
+	Lcall1.postMessage(__ZN6cheerp14MakeTypedArrayIhN6client10Uint8ArrayEEEPT0_PKT_j(Ldata,Mdata,Llen));
+}
+function __ZN6client4TMapIiPNS_14MessageChannelEE3getEi(Lthis,Lk){
+	return Lthis.get(Lk);
+}
+function __ZN7IpStack10isWasmNullIhEEbPT_(Lp,Mp){
+	var tmp0=0;
+	tmp0=(Lp.buffer===__heap);
+	if(tmp0){
+		tmp0=Mp;
+		return ((tmp0|0)===0?1:0)|0;
+	}
+	return 0|0;
+}
+function _cheerpCreate_ZN6client6StringC2EPKc(Larg0,Marg0){
+	return String(__ZN6client6String11fromCharPtrIcEEPS0_PKT_(Larg0,Marg0));
+}
+function __ZN6client6String11fromCharPtrIcEEPS0_PKT_(Ls,Ms){
+	var LretConstructor=null,tmp1=0,Lgeptoindexphi=0;
+	LretConstructor=String();
+	tmp1=Ls[Ms]|0;
+	if((tmp1&255)===0)return LretConstructor;
+	Lgeptoindexphi=0;
+	while(1){
+		LretConstructor=LretConstructor.concat(String.fromCharCode(tmp1<<24>>24));
+		Lgeptoindexphi=Lgeptoindexphi+1|0;
+		tmp1=Ls[Ms+Lgeptoindexphi|0]|0;
+		if((tmp1&255)!==0)continue;
+		break;
+	}
+	return LretConstructor;
+}
+function __ZN7IpStack11connAdapterEPN3tcp6SocketEi(Ls,Lerr){
+	var tmp0=0,Lcall=null,Lcall2=null;
+	tmp0=((Ls|0)|0);
+	Lcall=__ZN6client4TMapIiPNS_13EventListenerEE3getEi(__ZN7IpStackL11listenerMapE,tmp0);
+	Lcall2=__ZN6client4TMapIiPNS_14MessageChannelEE3getEi(__ZN7IpStackL7chanMapE,tmp0).port1;
+	if((Lerr|0)!==0)Lcall(null);
+	Lcall(Lcall2);
+}
+function __ZN6client4TMapIiPNS_13EventListenerEE3getEi(Lthis,Lk){
+	return Lthis.get(Lk);
+}
+function __ZN7IpStack7parseIPEPN6client6StringE(LjsStr){
+	var LsavedStack=null,tmp1=null,Lstr=0,Lcall=0;
+	LsavedStack=___getStackPtr();
+	tmp1=-16+LsavedStack|0;
+	___setStackPtr(tmp1);
+	Lstr=tmp1|0;
+	__ZNK6client6StringcvSsEv(Lstr,LjsStr);
+	Lcall=__ZN2ip4stonERKSs(Lstr)|0;
+	__ZNSsD2Ev(Lstr);
+	___setStackPtr(LsavedStack);
+	return Lcall|0;
+}
+function __ZN7IpStack7connectEiii(LlocalPort,Lip,Lport){
+	var Lcall=0,tmp1=0,Lp=null;
+	Lcall=__ZL6map_ipj(Lip)|0;
+	tmp1=_malloc(88)|0;
+	__ZN3tcp6SocketC2Ev(tmp1);
+	__ZN7IpStackL12setupChannelEPN3tcp6SocketE(tmp1);
+	if(((__ZN3tcp6Socket4bindEii(tmp1,LlocalPort)|0)&255)===0){
+		Lp={a0:null,a1:null,a2:null};
+		__Z13createPromisev(Lp);
+		__ZN6client4TMapIiPNS_13EventListenerEE3setEiS2_(__ZN7IpStackL11listenerMapE,(tmp1|0),Lp.a1);
+		if(((__ZN7IpStack11connectWasmEPN3tcp6SocketEii(tmp1,Lcall,Lport)|0)|0)===0)return Lp.a0;
+	}
+	__ZN3tcp6SocketD2Ev(tmp1);
+	_free(tmp1|0);
+	return null;
+}
+function __ZN7IpStackL12setupChannelEPN3tcp6SocketE(Ls){
+	var Lcall1=null,LretConstructor=null;
+	LretConstructor=new MessageChannel();
+	LretConstructor.port1;
+	Lcall1=LretConstructor.port2;
+	__ZN6client4TMapIiPNS_14MessageChannelEE3setEiS2_(__ZN7IpStackL7chanMapE,((Ls|0)|0),LretConstructor);
+	__ZN7IpStack8recvWasmEPN3tcp6SocketE(Ls|0);
+	LretConstructor={a0:0};
+	LretConstructor.a0=(Ls|0);
+	Lcall1.onmessage=__ZN6cheerp8CallbackIZN7IpStackL12setupChannelEPN3tcp6SocketEE3$_7EEPN6client13EventListenerEOT_(LretConstructor);
+}
+function __ZN6client4TMapIiPNS_13EventListenerEE3setEiS2_(Lthis,Lk,Lv){
+	Lthis.set(Lk,Lv);
+}
+function __ZN6client4TMapIiPNS_14MessageChannelEE3setEiS2_(Lthis,Lk,Lv){
+	Lthis.set(Lk,Lv);
+}
+function __ZN6cheerp8CallbackIZN7IpStackL12setupChannelEPN3tcp6SocketEE3$_7EEPN6client13EventListenerEOT_(Lfunc){
+	var Lref$ptmp=null,Lcall1=null;
+	Lref$ptmp={a0:null,a1:null,a2:null};
+	__ZN6cheerp12make_closureIZN7IpStackL12setupChannelEPN3tcp6SocketEE3$_7EEDTclsr13ClosureHelperIT_DTadsr3std16remove_referenceIS6_E4typeEonclEEE12make_closureclgssr6cheerpE7forwardIS6_Efp_EEEOS6_(Lref$ptmp,Lfunc);
+	Lcall1=__ZN6cheerp7ClosureIFvPN6client12MessageEventEEEcvPNS1_13EventListenerEEv(Lref$ptmp);
+	__ZN6cheerp7ClosureIFvPN6client12MessageEventEEED2Ev(Lref$ptmp);
+	return Lcall1;
+}
+function __ZN6cheerp12make_closureIZN7IpStackL12setupChannelEPN3tcp6SocketEE3$_7EEDTclsr13ClosureHelperIT_DTadsr3std16remove_referenceIS6_E4typeEonclEEE12make_closureclgssr6cheerpE7forwardIS6_Efp_EEEOS6_(Lagg$presult,Lfunc){
+	__ZN6cheerp13ClosureHelperIZN7IpStackL12setupChannelEPN3tcp6SocketEE3$_7MS5_KFvPN6client12MessageEventEEE12make_closureEOS5_(Lagg$presult,Lfunc);
+}
+function __ZN6cheerp7ClosureIFvPN6client12MessageEventEEEcvPNS1_13EventListenerEEv(Lthis){
+	var tmp0=null;
+	if(Lthis.a1!==null){
+		tmp0=[{a0:null,a1:null}];
+		tmp0[0].a0=Lthis.a1;
+		tmp0[0].a1=Lthis.a2;
+		tmp0=cheerpCreateClosure(__ZN6cheerp7ClosureIFvPN6client12MessageEventEEE14deleter_helperEPNS5_13DeleterHelperE,tmp0[0]);
+		__ZN6cheerp20EscapedResourcesListIN6client13EventListenerEE3addEPS2_PNS1_6ObjectE(Lthis.a0,tmp0);
+		Lthis.a1=null;
+	}
+	return Lthis.a0;
+}
+function __ZN6cheerp7ClosureIFvPN6client12MessageEventEEED2Ev(Lthis){
+	var tmp0=null;
+	tmp0=Lthis.a1;
+	if(tmp0!==null)tmp0(Lthis.a2);
+}
+function __ZN6cheerp7ClosureIFvPN6client12MessageEventEEE14deleter_helperEPNS5_13DeleterHelperE(Lh){
+	Lh.a0(Lh.a1);
+}
+function __ZN6cheerp13ClosureHelperIZN7IpStackL12setupChannelEPN3tcp6SocketEE3$_7MS5_KFvPN6client12MessageEventEEE12make_closureEOS5_(Lagg$presult,Lfunc){
+	__ZN6cheerp7ClosureIFvPN6client12MessageEventEEEC2IZN7IpStackL12setupChannelEPN3tcp6SocketEE3$_7EEOT_PNSt9enable_ifIXntsr3std14is_convertibleISC_PS4_EE5valueEvE4typeEPNSE_IXntsrNS5_13_must_destroyISC_EE5valueEvE4typeE(Lagg$presult,Lfunc);
+}
+function __ZN6cheerp7ClosureIFvPN6client12MessageEventEEEC2IZN7IpStackL12setupChannelEPN3tcp6SocketEE3$_7EEOT_PNSt9enable_ifIXntsr3std14is_convertibleISC_PS4_EE5valueEvE4typeEPNSE_IXntsrNS5_13_must_destroyISC_EE5valueEvE4typeE(Lthis,Lf){
+	var tmp0=null,tmp1=null;
+	tmp0=[{a0:0}];
+	tmp0[0].a0=(Lf.a0|0);
+	tmp1=cheerpCreateClosure(__ZN6cheerp12InvokeHelperIvE6invokeIZN7IpStackL12setupChannelEPN3tcp6SocketEE3$_7JPN6client12MessageEventEEEEvPT_DpT0_,tmp0[0]);
+	Lthis.a0=tmp1;
+	Lthis.a1=null;
+	Lthis.a2=tmp0[0];
+}
+function __ZN6cheerp12InvokeHelperIvE6invokeIZN7IpStackL12setupChannelEPN3tcp6SocketEE3$_7JPN6client12MessageEventEEEEvPT_DpT0_(Lfunc,Largs){
+	__ZZN7IpStackL12setupChannelEPN3tcp6SocketEENK3$_7clEPN6client12MessageEventE(Lfunc,Largs);
+}
+function __ZZN7IpStackL12setupChannelEPN3tcp6SocketEENK3$_7clEPN6client12MessageEventE(Lthis,Lev){
+	var LsavedStack=null,Lcall=null,Lcall8=null,Lcall8o=0,Lcall7=null,Lcall7o=0,Lbuf=0,Li$p04=0;
+	LsavedStack=___getStackPtr();
+	Lcall7=-16+LsavedStack|0;
+	___setStackPtr(Lcall7);
+	Lcall=Lev.data;
+	if(Lcall!==null){
+		Lbuf=Lcall7|0;
+		__ZNSt6vectorIhSaIhEEC2Ej(Lbuf,~~ +Lcall.length);
+		if( +Lcall.length>0){
+			Li$p04=0;
+			while(1){
+				Lcall7=__ZN6client10Uint8ArrayixEi(Lcall,Li$p04);
+				Lcall7o=oSlot;
+				Lcall8=HEAP8;
+				Lcall8o=__ZNSt6vectorIhSaIhEEixEj(Lbuf,Li$p04)|0;
+				Lcall8[Lcall8o]=Lcall7[Lcall7o]|0;
+				Li$p04=Li$p04+1|0;
+				if( +Lcall.length>(+(Li$p04|0)))continue;
+				break;
+			}
+		}
+		__ZN7IpStack8sendWasmEPN3tcp6SocketERKSt6vectorIhSaIhEE(Lthis.a0|0,Lbuf);
+		__ZNSt6vectorIhSaIhEED2Ev(Lbuf);
+	}else{
+		__ZN3tcp6Socket5closeEv(Lthis.a0|0);
+		Lbuf=Lthis.a0|0;
+		if((Lbuf|0)!=(0|0)){
+			__ZN3tcp6SocketD2Ev(Lbuf);
+			_free(Lbuf|0);
+		}
+	}
+	___setStackPtr(LsavedStack);
+}
+function __ZN6client10Uint8ArrayixEi(Lthis,Lindex){
+	oSlot=0+Lindex|0;
+	return Lthis;
+}
+function __ZN7IpStack13acceptAdapterEPN3tcp6SocketES2_iii(LlistenSock,LnewSock,Laddr,Lport){
+	var Lcall=0,Lcall2=null,Lcall4=null,tmp3=null;
+	Lcall=__ZL6map_ipj(Laddr)|0;
+	__ZN7IpStackL12setupChannelEPN3tcp6SocketE(LnewSock|0);
+	Lcall2=__ZN6client4TMapIiPNS_14MessageChannelEE3getEi(__ZN7IpStackL7chanMapE,((LlistenSock|0)|0)).port2;
+	Lcall4=__ZN6client4TMapIiPNS_14MessageChannelEE3getEi(__ZN7IpStackL7chanMapE,((LnewSock|0)|0)).port1;
+	tmp3={addr: Lcall, port: Lport, arg1: Lcall4};
+	Lcall2.postMessage(tmp3,new Array(Lcall4));
+}
+function __ZN7IpStack6listenEi(LlocalPort){
+	var tmp0=0,Lcall9=null,Lcall10=null,LretConstructor=null;
+	tmp0=_malloc(88)|0;
+	__ZN3tcp6SocketC2Ev(tmp0);
+	if(((__ZN3tcp6Socket4bindEii(tmp0,LlocalPort)|0)&255)===0)if(((__ZN3tcp6Socket6listenEv(tmp0)|0)&255)===0){
+		LretConstructor=new MessageChannel();
+		Lcall9=LretConstructor.port1;
+		Lcall10=LretConstructor.port2;
+		__ZN6client4TMapIiPNS_14MessageChannelEE3setEiS2_(__ZN7IpStackL7chanMapE,(tmp0|0),LretConstructor);
+		__ZN7IpStack10acceptWasmEPN3tcp6SocketE(tmp0);
+		LretConstructor={a0:0};
+		LretConstructor.a0=tmp0;
+		Lcall10.onmessage=__ZN6cheerp8CallbackIZN7IpStack6listenEiE3$_4EEPN6client13EventListenerEOT_(LretConstructor);
+		return Lcall9;
+	}
+	__ZN3tcp6SocketD2Ev(tmp0);
+	_free(tmp0|0);
+	return null;
+}
+function __ZN6cheerp8CallbackIZN7IpStack6listenEiE3$_4EEPN6client13EventListenerEOT_(Lfunc){
+	var Lref$ptmp=null,Lcall1=null;
+	Lref$ptmp={a0:null,a1:null,a2:null};
+	__ZN6cheerp12make_closureIZN7IpStack6listenEiE3$_4EEDTclsr13ClosureHelperIT_DTadsr3std16remove_referenceIS3_E4typeEonclEEE12make_closureclgssr6cheerpE7forwardIS3_Efp_EEEOS3_(Lref$ptmp,Lfunc);
+	Lcall1=__ZN6cheerp7ClosureIFvPN6client12MessageEventEEEcvPNS1_13EventListenerEEv(Lref$ptmp);
+	__ZN6cheerp7ClosureIFvPN6client12MessageEventEEED2Ev(Lref$ptmp);
+	return Lcall1;
+}
+function __ZN6cheerp12make_closureIZN7IpStack6listenEiE3$_4EEDTclsr13ClosureHelperIT_DTadsr3std16remove_referenceIS3_E4typeEonclEEE12make_closureclgssr6cheerpE7forwardIS3_Efp_EEEOS3_(Lagg$presult,Lfunc){
+	__ZN6cheerp13ClosureHelperIZN7IpStack6listenEiE3$_4MS2_KFvPN6client12MessageEventEEE12make_closureEOS2_(Lagg$presult,Lfunc);
+}
+function __ZN6cheerp13ClosureHelperIZN7IpStack6listenEiE3$_4MS2_KFvPN6client12MessageEventEEE12make_closureEOS2_(Lagg$presult,Lfunc){
+	__ZN6cheerp7ClosureIFvPN6client12MessageEventEEEC2IZN7IpStack6listenEiE3$_4EEOT_PNSt9enable_ifIXntsr3std14is_convertibleIS9_PS4_EE5valueEvE4typeEPNSB_IXntsrNS5_13_must_destroyIS9_EE5valueEvE4typeE(Lagg$presult,Lfunc);
+}
+function __ZN6cheerp7ClosureIFvPN6client12MessageEventEEEC2IZN7IpStack6listenEiE3$_4EEOT_PNSt9enable_ifIXntsr3std14is_convertibleIS9_PS4_EE5valueEvE4typeEPNSB_IXntsrNS5_13_must_destroyIS9_EE5valueEvE4typeE(Lthis,Lf){
+	var tmp0=null,tmp1=null;
+	tmp0=[{a0:0}];
+	tmp0[0].a0=(Lf.a0|0);
+	tmp1=cheerpCreateClosure(__ZN6cheerp12InvokeHelperIvE6invokeIZN7IpStack6listenEiE3$_4JPN6client12MessageEventEEEEvPT_DpT0_,tmp0[0]);
+	Lthis.a0=tmp1;
+	Lthis.a1=null;
+	Lthis.a2=tmp0[0];
+}
+function __ZN6cheerp12InvokeHelperIvE6invokeIZN7IpStack6listenEiE3$_4JPN6client12MessageEventEEEEvPT_DpT0_(Lfunc,Largs){
+}
+function __ZN7IpStack14recvAdapterUdpEPN3udp6SocketEPhjii(Ls,Ldata,Mdata,Llen,Laddr,Lport){
+	var Lcall=0,Lcall2=null;
+	Lcall=__ZL6map_ipj(Laddr)|0;
+	Lcall2=__ZN6client4TMapIiPNS_14MessageChannelEE3getEi(__ZN7IpStackL7chanMapE,((Ls|0)|0)).port2;
+	Lcall2.postMessage({addr: Lcall, port: Lport, data: __ZN6cheerp14MakeTypedArrayIhN6client10Uint8ArrayEEEPT0_PKT_j(Ldata,Mdata,Llen)});
+}
+function __ZN7IpStack4bindEi(LlocalPort){
+	var tmp0=0,Lcall1=null,Lcall2=null,LretConstructor=null;
+	tmp0=_malloc(32)|0;
+	__ZN3udp6SocketC2Ev(tmp0);
+	if(((__ZN3udp6Socket4bindEii(tmp0,LlocalPort)|0)&255)!==0){
+		__ZN3udp6SocketD2Ev(tmp0);
+		_free(tmp0|0);
+		return null;
+	}
+	LretConstructor=new MessageChannel();
+	Lcall1=LretConstructor.port1;
+	Lcall2=LretConstructor.port2;
+	__ZN6client4TMapIiPNS_14MessageChannelEE3setEiS2_(__ZN7IpStackL7chanMapE,(tmp0|0),LretConstructor);
+	__ZN7IpStack11recvWasmUdpEPN3udp6SocketE(tmp0);
+	LretConstructor={a0:0};
+	LretConstructor.a0=tmp0;
+	Lcall2.onmessage=__ZN6cheerp8CallbackIZN7IpStack4bindEiE3$_6EEPN6client13EventListenerEOT_(LretConstructor);
+	return Lcall1;
+}
+function __ZN6cheerp8CallbackIZN7IpStack4bindEiE3$_6EEPN6client13EventListenerEOT_(Lfunc){
+	var Lref$ptmp=null,Lcall1=null;
+	Lref$ptmp={a0:null,a1:null,a2:null};
+	__ZN6cheerp12make_closureIZN7IpStack4bindEiE3$_6EEDTclsr13ClosureHelperIT_DTadsr3std16remove_referenceIS3_E4typeEonclEEE12make_closureclgssr6cheerpE7forwardIS3_Efp_EEEOS3_(Lref$ptmp,Lfunc);
+	Lcall1=__ZN6cheerp7ClosureIFvPN6client12MessageEventEEEcvPNS1_13EventListenerEEv(Lref$ptmp);
+	__ZN6cheerp7ClosureIFvPN6client12MessageEventEEED2Ev(Lref$ptmp);
+	return Lcall1;
+}
+function __ZN6cheerp12make_closureIZN7IpStack4bindEiE3$_6EEDTclsr13ClosureHelperIT_DTadsr3std16remove_referenceIS3_E4typeEonclEEE12make_closureclgssr6cheerpE7forwardIS3_Efp_EEEOS3_(Lagg$presult,Lfunc){
+	__ZN6cheerp13ClosureHelperIZN7IpStack4bindEiE3$_6MS2_KFvPN6client12MessageEventEEE12make_closureEOS2_(Lagg$presult,Lfunc);
+}
+function __ZN6cheerp13ClosureHelperIZN7IpStack4bindEiE3$_6MS2_KFvPN6client12MessageEventEEE12make_closureEOS2_(Lagg$presult,Lfunc){
+	__ZN6cheerp7ClosureIFvPN6client12MessageEventEEEC2IZN7IpStack4bindEiE3$_6EEOT_PNSt9enable_ifIXntsr3std14is_convertibleIS9_PS4_EE5valueEvE4typeEPNSB_IXntsrNS5_13_must_destroyIS9_EE5valueEvE4typeE(Lagg$presult,Lfunc);
+}
+function __ZN6cheerp7ClosureIFvPN6client12MessageEventEEEC2IZN7IpStack4bindEiE3$_6EEOT_PNSt9enable_ifIXntsr3std14is_convertibleIS9_PS4_EE5valueEvE4typeEPNSB_IXntsrNS5_13_must_destroyIS9_EE5valueEvE4typeE(Lthis,Lf){
+	var tmp0=null,tmp1=null;
+	tmp0=[{a0:0}];
+	tmp0[0].a0=(Lf.a0|0);
+	tmp1=cheerpCreateClosure(__ZN6cheerp12InvokeHelperIvE6invokeIZN7IpStack4bindEiE3$_6JPN6client12MessageEventEEEEvPT_DpT0_,tmp0[0]);
+	Lthis.a0=tmp1;
+	Lthis.a1=null;
+	Lthis.a2=tmp0[0];
+}
+function __ZN6cheerp12InvokeHelperIvE6invokeIZN7IpStack4bindEiE3$_6JPN6client12MessageEventEEEEvPT_DpT0_(Lfunc,Largs){
+	__ZZN7IpStack4bindEiENK3$_6clEPN6client12MessageEventE(Lfunc,Largs);
+}
+function __ZZN7IpStack4bindEiENK3$_6clEPN6client12MessageEventE(Lthis,Lev){
+	var LsavedStack=null,Lcall=null,Lcall3=null,Lcall9=null,Lcall9o=0,Lcall11=0,Lcall8=null,Lcall8o=0,Lbuf=0,Li$p04=0;
+	LsavedStack=___getStackPtr();
+	Lcall8=-16+LsavedStack|0;
+	___setStackPtr(Lcall8);
+	Lcall=Lev.data;
+	if(Lcall!==null){
+		Lcall3=Lcall.data;
+		Lbuf=Lcall8|0;
+		__ZNSt6vectorIhSaIhEEC2Ej(Lbuf,~~ +Lcall3.length);
+		if( +Lcall3.length>0){
+			Li$p04=0;
+			while(1){
+				Lcall8=__ZN6client10Uint8ArrayixEi(Lcall3,Li$p04);
+				Lcall8o=oSlot;
+				Lcall9=HEAP8;
+				Lcall9o=__ZNSt6vectorIhSaIhEEixEj(Lbuf,Li$p04)|0;
+				Lcall9[Lcall9o]=Lcall8[Lcall8o]|0;
+				Li$p04=Li$p04+1|0;
+				if( +Lcall3.length>(+(Li$p04|0)))continue;
+				break;
+			}
+		}
+		Li$p04=Lcall.addr;
+		Lcall11=Lcall.port;
+		__ZN7IpStack11sendWasmUdpEPN3udp6SocketERKSt6vectorIhSaIhEEjj(Lthis.a0|0,Lbuf,Li$p04,Lcall11);
+		__ZNSt6vectorIhSaIhEED2Ev(Lbuf);
+	}else{
+		__ZN3udp6Socket5closeEv(Lthis.a0|0);
+		Lbuf=Lthis.a0|0;
+		if((Lbuf|0)!=(0|0)){
+			__ZN3udp6SocketD2Ev(Lbuf);
+			_free(Lbuf|0);
+		}
+	}
+	___setStackPtr(LsavedStack);
+}
+function __ZN10__cxxabiv1L24__cxa_throw_wasm_adapterEjPSt9type_infoj(Lthrown_object){
+	var Ldest$paddr=null,Lref$ptmp=null,Ltinfo$paddr=null;
+	Ltinfo$paddr=[0];
+	Ltinfo$paddr[0]=(1048752|0);
+	Ldest$paddr=[0];
+	Ldest$paddr[0]=((58|0)|0);
+	Lref$ptmp=[nullObj];
+	Lref$ptmp[0]={d:null,o:Lthrown_object};
+	Ltinfo$paddr=__ZN10__cxxabiv19Exception8allocateIJPvRPSt9type_infoRjEEEPS0_DpOT_(Lref$ptmp,0,Ltinfo$paddr,0,Ldest$paddr,0);
+	__ZN10__cxxabiv1L8do_throwEPNS_9ExceptionE(Ltinfo$paddr);
+	;
+}
+function __ZN10__cxxabiv19Exception8allocateIJPvRPSt9type_infoRjEEEPS0_DpOT_(Largs,Margs,Largs1,Margs1,Largs3,Margs3){
+	var tmp0=0,Lid$p0$plcssa28$pi$pi=0,tmp2=null,Lid$p022$pi$pi=0,tmp4=null;
+	Lid$p0$plcssa28$pi$pi=__ZN10__cxxabiv19Exception9allocatorE$p2|0;
+	a:{
+		b:{
+			if((Lid$p0$plcssa28$pi$pi|0)>1){
+				tmp2=__ZN10__cxxabiv19Exception9allocatorE$p1;
+				Lid$p022$pi$pi=1;
+				while(1){
+					if((tmp2[Lid$p022$pi$pi]&255)!==0){
+						Lid$p022$pi$pi=Lid$p022$pi$pi+1|0;
+						if((Lid$p022$pi$pi|0)===(Lid$p0$plcssa28$pi$pi|0))break b;
+						continue;
+					}
+					break;
+				}
+			}else{
+				Lid$p022$pi$pi=1;
+			}
+			if((Lid$p022$pi$pi|0)!==(Lid$p0$plcssa28$pi$pi|0)){
+				Lid$p0$plcssa28$pi$pi=Lid$p022$pi$pi;
+				break a;
+			}
+		}
+		__ZN10__cxxabiv19Exception9allocatorE$p2=Lid$p0$plcssa28$pi$pi<<1;
+		tmp2=__ZN10__cxxabiv19Exception9allocatorE$p0;
+		Lid$p022$pi$pi=__imul(Lid$p0$plcssa28$pi$pi,88)|0;
+		if(tmp2!==nullArray||0!==0)tmp2=resizeArray_struct$p_ZN10__cxxabiv19ExceptionE(tmp2,tmp2.length,Lid$p022$pi$pi/44|0);
+		else tmp2=createArray_struct$p_ZN10__cxxabiv19ExceptionE(Lid$p022$pi$pi/44|0);
+		__ZN10__cxxabiv19Exception9allocatorE$p0=tmp2;
+		Lid$p022$pi$pi=__ZN10__cxxabiv19Exception9allocatorE$p2|0;
+		tmp2=__ZN10__cxxabiv19Exception9allocatorE$p1;
+		if(tmp2!==nullArray||0!==0)tmp2=(function(){var __old__=tmp2;
+			var __ret__=new Uint8Array(Lid$p022$pi$pi/1|0);
+			__ret__.set(__old__.subarray(0, Math.min(__ret__.length,__old__.length)));
+			return __ret__;})();
+		else tmp2=new Uint8Array(Lid$p022$pi$pi/1|0);
+		__ZN10__cxxabiv19Exception9allocatorE$p1=tmp2;
+	}
+	tmp2=__ZN10__cxxabiv19Exception9allocatorE$p0;
+	tmp4=Largs[Margs];
+	Lid$p022$pi$pi=Largs1[Margs1]|0;
+	tmp0=Largs3[Margs3]|0;
+	tmp2[Lid$p0$plcssa28$pi$pi].a1=tmp4.d[tmp4.o];
+	tmp2[Lid$p0$plcssa28$pi$pi].a2=null;
+	tmp2[Lid$p0$plcssa28$pi$pi].a3=Lid$p022$pi$pi;
+	tmp2[Lid$p0$plcssa28$pi$pi].a4=null;
+	tmp2[Lid$p0$plcssa28$pi$pi].i5=tmp0;
+	tmp2[Lid$p0$plcssa28$pi$pi].i6=1;
+	tmp2[Lid$p0$plcssa28$pi$pi].i7=0;
+	tmp2[Lid$p0$plcssa28$pi$pi].a9=null;
+	tmp2[Lid$p0$plcssa28$pi$pi].a10=null;
+	tmp4=__ZN10__cxxabiv19Exception9allocatorE$p1;
+	tmp4[Lid$p0$plcssa28$pi$pi]=1;
+	return tmp2[Lid$p0$plcssa28$pi$pi];
+}
+function __ZN10__cxxabiv1L8do_throwEPNS_9ExceptionE(Lex){
+	var tmp0=0,LretConstructor8=null,LretConstructor=null,LretConstructoro=0;
+	tmp0=Lex.a3|0;
+	LretConstructoro=HEAP32[4+tmp0>>2];
+	LretConstructor=HEAP8;
+	LretConstructor=_cheerpCreate_ZN6client6StringC2EPKc(LretConstructor,LretConstructoro);
+	LretConstructor8=new CheerpException(LretConstructor);
+	Lex.a0=LretConstructor8;
+	throw LretConstructor8;
+	;
+}
+function _print(Lbuf,Mbuf,Llen){
+	var Lcall=null,Lsub=0;
+	Lcall=__ZN6client6String8fromUtf8EPKcj(Lbuf,Mbuf,Llen);
+	Lsub=(Lcall.length)-1|0;
+	if(((Lcall.charCodeAt(Lsub))|0)===10){
+		console.log(Lcall.substr(0,Lsub));
+		return;
+	}
+	console.log(Lcall);
+}
+function __ZN6client6String8fromUtf8EPKcj(Lin,Min,Llen){
+	var tmp0=0,LretConstructor=null,Lgeptoindexphi=0,Llen$paddr$p06=0,Lcodepoint$p03=0,Lconv2=0;
+	LretConstructor=String();
+	if((Llen|0)===0)return LretConstructor;
+	Llen$paddr$p06=Llen;
+	Lgeptoindexphi=0;
+	while(1){
+		tmp0=Lin[Min+Lgeptoindexphi|0]|0;
+		if((tmp0&255)!==0){
+			Lconv2=tmp0&255;
+			if(tmp0<<24<=-16777216)if((tmp0&255)<192){
+				Lconv2=(Lconv2&63)+(Lcodepoint$p03<<6)|0;
+			}else if((tmp0&255)<224){
+				Lconv2&=31;
+			}else if((tmp0&255)<240){
+				Lconv2&=15;
+			}else{
+				Lconv2&=7;
+			}
+			Llen$paddr$p06=Llen$paddr$p06-1|0;
+			Lgeptoindexphi=Lgeptoindexphi+1|0;
+			a:{
+				if((Llen$paddr$p06|0)!==0)if((Lin[Min+Lgeptoindexphi|0]&192)===128){
+					Lcodepoint$p03=Lconv2;
+					break a;
+				}
+				if(Lconv2>>>0<65536){
+					Lcodepoint$p03=Lconv2;
+				}else{
+					Lcodepoint$p03=Lconv2-65536|0;
+					LretConstructor=LretConstructor.concat(String.fromCharCode((Lcodepoint$p03>>>10)+55296|0));
+					Lconv2=(Lconv2&1023)+56320|0;
+				}
+				LretConstructor=LretConstructor.concat(String.fromCharCode(Lconv2));
+			}
+			if((Llen$paddr$p06|0)!==0)continue;
+			return LretConstructor;
+		}
+		break;
+	}
+	return LretConstructor;
+}
+function __start(){
+	___cxx_global_var_init();
+	___cxx_global_var_init$p3();
+	___cxx_global_var_init$p4();
+}
+function ___wrapper__print(Larg0,Larg1){
+	_print(HEAP8,Larg0>>0,Larg1);
+}
+function ___wrapper___ZN7IpStack14recvAdapterUdpEPN3udp6SocketEPhjii(Larg0,Larg1,Larg2,Larg3,Larg4){
+	__ZN7IpStack14recvAdapterUdpEPN3udp6SocketEPhjii(Larg0|0,HEAP8,Larg1>>0,Larg2,Larg3,Larg4);
+}
+function ___wrapper___ZN7IpStack11recvAdapterEPN3tcp6SocketEPhj(Larg0,Larg1,Larg2){
+	__ZN7IpStack11recvAdapterEPN3tcp6SocketEPhj(Larg0|0,HEAP8,Larg1>>0,Larg2);
+}
+function ___wrapper___Z9output_jsPhi(Larg0,Larg1){
+	__Z9output_jsPhi(HEAP8,Larg0>>0,Larg1);
+}
+var __ZN7IpStackL11listenerMapE=null;
+var __ZN7IpStackL7chanMapE=null;
+var __ZN6cheerp20EscapedResourcesListIN6client13EventListenerEE9resourcesE=null;
+var __ZL9output_cb=null;
+var __ZN10__cxxabiv19Exception9allocatorE$p2=16;
+var _promotedMalloc$p6=new Uint8Array(16);
+var __ZN10__cxxabiv19Exception9allocatorE$p1=_promotedMalloc$p6;
+var _promotedMalloc$p5=createArray_struct$p_ZN10__cxxabiv19ExceptionE(16);
+var __ZN10__cxxabiv19Exception9allocatorE$p0=_promotedMalloc$p5;
+function constructor_struct$p_ZN10__cxxabiv19ExceptionE(){
+	this.a0=null;
+	this.a1=null;
+	this.a2=null;
+	this.a3=0;
+	this.a4=null;
+	this.i5=0;
+	this.i6=0;
+	this.i7=0;
+	this.a8=null;
+	this.a9=null;
+	this.a10=null;
+}
+function createArray_struct$p_ZN10__cxxabiv19ExceptionE(e){
+	var r=[];
+	for(var i=0;i<e;i++)
+	r[i]=new constructor_struct$p_ZN10__cxxabiv19ExceptionE();
+	return r;
+}
+function resizeArray_struct$p_ZN10__cxxabiv19ExceptionE(r,s,e){
+	for(var i=s;i<e;i++)
+	r[i]=new constructor_struct$p_ZN10__cxxabiv19ExceptionE();
+	return r;
+}
+function cheerpCreateClosure(func, obj){return function(){var a=Array.prototype.slice.call(arguments);a.unshift(obj);return func.apply(null,a);};}
+function cheerpCreateClosureSplit(func, obj, objo){return function(){var a=Array.prototype.slice.call(arguments);a.unshift(obj,objo);return func.apply(null,a);};}
+function CheerpException(m){
+	var instance=new Error('Uncaught C++ exception: '+m);
+	instance.name='CheerpException';
+	Object.setPrototypeOf(instance,Object.getPrototypeOf(this));
+	if(Error.captureStackTrace){
+		Error.captureStackTrace(instance, CheerpException);
+	}
+	return instance;
+}
+CheerpException.prototype=Object.create(Error.prototype);
+function growLinearMemory(bytes){
+	var pages=(bytes+65535)>>16;
+	try{
+		__asm.memory.grow(pages);
+		__heap=__asm.memory.buffer;
+		assignHeaps(__heap);
+		return pages<<16;
+	}catch(e){
+		return -1;
+	}
+}
+var IpStack={
+	bind:null,
+	connect:null,
+	down:null,
+	init:null,
+	input:null,
+	listen:null,
+	output:null,
+	parseIP:null,
+	up:null,
+};
+var HEAP8=null,HEAP32=null,__asm=null,__heap=null;function __dummy(){throw new Error('this should be unreachable');};
+var ___cxx_global_var_init=null;
+var _malloc=null;
+var __ZN3udp6SocketC2Ev=null;
+var __ZN3udp6Socket4bindEii=null;
+var __ZN3udp6SocketD2Ev=null;
+var __ZN7IpStack11recvWasmUdpEPN3udp6SocketE=null;
+var __ZN3udp6Socket5closeEv=null;
+var __ZNSt6vectorIhSaIhEEC2Ej=null;
+var __ZNSt6vectorIhSaIhEEixEj=null;
+var __ZN7IpStack11sendWasmUdpEPN3udp6SocketERKSt6vectorIhSaIhEEjj=null;
+var __ZNSt6vectorIhSaIhEED2Ev=null;
+var __ZL6map_ipj=null;
+var __ZN3tcp6SocketC2Ev=null;
+var __ZN3tcp6Socket4bindEii=null;
+var __ZN3tcp6Socket6listenEv=null;
+var __ZN7IpStack10acceptWasmEPN3tcp6SocketE=null;
+var __ZN3tcp6SocketD2Ev=null;
+var __ZN7IpStack8recvWasmEPN3tcp6SocketE=null;
+var __ZN3tcp6Socket5closeEv=null;
+var __ZN7IpStack8sendWasmEPN3tcp6SocketERKSt6vectorIhSaIhEE=null;
+var __ZN7IpStack11connectWasmEPN3tcp6SocketEii=null;
+var __ZN2ip4stonERKSs=null;
+var __ZNSsD2Ev=null;
+var __ZNSsC2Ev=null;
+var __ZNSs6resizeEj=null;
+var __ZNSsixEj_icf=null;
+var _pbuf_alloc=null;
+var __Z22copy_to_pbuf_and_inputP4pbufRKSt6vectorIhSaIhEE=null;
+var __Z4downv=null;
+var __ZNSt13unordered_mapISsSsSt4hashISsESt8equal_toISsESaISt4pairIKSsSsEEEC2Ev=null;
+var __ZNSt13unordered_mapISsSsSt4hashISsESt8equal_toISsESaISt4pairIKSsSsEEE7emplaceIJSsSsEEES4_ISt19__hash_map_iteratorISt15__hash_iteratorIPSt11__hash_nodeISt17__hash_value_typeISsSsEPvEEEbEDpOT_=null;
+var __Z2upRKSsRKSt13unordered_mapISsSsSt4hashISsESt8equal_toISsESaISt4pairIS_SsEEE=null;
+var __ZNSt13unordered_mapISsSsSt4hashISsESt8equal_toISsESaISt4pairIKSsSsEEED2Ev=null;
+var __Z4initv=null;
+var __Z16udpecho_raw_initv=null;
+var __Z16tcpecho_raw_initv=null;
+var _sys_check_timeouts=null;
+var _free=null;
+var ___getStackPtr=null;
+var ___setStackPtr=null;
+export default function(Lh){
+	return (Lh&&Lh.buffer)?
+	Promise.resolve(Lh.buffer):
+	fetchBuffer((Lh&&Lh.absPath)?Lh.absPath:new URL('ipstack.wasm', import.meta.url)).then(Lh=>
+	WebAssembly.instantiate(Lh,
+	{i:{
+			___syscall_rt_sigprocmask:__dummy,
+			___syscall_rt_sigaction:__dummy,
+			___syscall_tkill:__dummy,
+			___syscall_exit_group:__dummy,
+			___syscall_exit:__dummy,
+			___syscall_futex:__dummy,
+			___syscall__llseek:__dummy,
+			___wrapper___Z9output_jsPhi:___wrapper___Z9output_jsPhi,
+			___syscall_close:__dummy,
+			___wrapper___ZN7IpStack11recvAdapterEPN3tcp6SocketEPhj:___wrapper___ZN7IpStack11recvAdapterEPN3tcp6SocketEPhj,
+			__ZN7IpStack13acceptAdapterEPN3tcp6SocketES2_iii:__ZN7IpStack13acceptAdapterEPN3tcp6SocketES2_iii,
+			___wrapper___ZN7IpStack14recvAdapterUdpEPN3udp6SocketEPhjii:___wrapper___ZN7IpStack14recvAdapterUdpEPN3udp6SocketEPhjii,
+			__ZN7IpStack11connAdapterEPN3tcp6SocketEi:__ZN7IpStack11connAdapterEPN3tcp6SocketEi,
+			_sys_now:_sys_now,
+			__ZN10__cxxabiv1L24__cxa_throw_wasm_adapterEjPSt9type_infoj:__ZN10__cxxabiv1L24__cxa_throw_wasm_adapterEjPSt9type_infoj,
+			__Z14start_timeoutsv:__Z14start_timeoutsv,
+			___wrapper__print:___wrapper__print,
+			growLinearMemory:growLinearMemory,
+		}})
+	).then(Lh=>{
+		__asm=Lh.instance.exports;
+		__heap=__asm.memory.buffer;
+		assignHeaps(__heap);
+		___cxx_global_var_init=__asm.___cxx_global_var_init;
+		_malloc=__asm._malloc;
+		__ZN3udp6SocketC2Ev=__asm.__ZN3udp6SocketC2Ev;
+		__ZN3udp6Socket4bindEii=__asm.__ZN3udp6Socket4bindEii;
+		__ZN3udp6SocketD2Ev=__asm.__ZN3udp6SocketD2Ev;
+		__ZN7IpStack11recvWasmUdpEPN3udp6SocketE=__asm.__ZN7IpStack11recvWasmUdpEPN3udp6SocketE;
+		__ZN3udp6Socket5closeEv=__asm.__ZN3udp6Socket5closeEv;
+		__ZNSt6vectorIhSaIhEEC2Ej=__asm.__ZNSt6vectorIhSaIhEEC2Ej;
+		__ZNSt6vectorIhSaIhEEixEj=__asm.__ZNSt6vectorIhSaIhEEixEj;
+		__ZN7IpStack11sendWasmUdpEPN3udp6SocketERKSt6vectorIhSaIhEEjj=__asm.__ZN7IpStack11sendWasmUdpEPN3udp6SocketERKSt6vectorIhSaIhEEjj;
+		__ZNSt6vectorIhSaIhEED2Ev=__asm.__ZNSt6vectorIhSaIhEED2Ev;
+		__ZL6map_ipj=__asm.__ZL6map_ipj;
+		__ZN3tcp6SocketC2Ev=__asm.__ZN3tcp6SocketC2Ev;
+		__ZN3tcp6Socket4bindEii=__asm.__ZN3tcp6Socket4bindEii;
+		__ZN3tcp6Socket6listenEv=__asm.__ZN3tcp6Socket6listenEv;
+		__ZN7IpStack10acceptWasmEPN3tcp6SocketE=__asm.__ZN7IpStack10acceptWasmEPN3tcp6SocketE;
+		__ZN3tcp6SocketD2Ev=__asm.__ZN3tcp6SocketD2Ev;
+		__ZN7IpStack8recvWasmEPN3tcp6SocketE=__asm.__ZN7IpStack8recvWasmEPN3tcp6SocketE;
+		__ZN3tcp6Socket5closeEv=__asm.__ZN3tcp6Socket5closeEv;
+		__ZN7IpStack8sendWasmEPN3tcp6SocketERKSt6vectorIhSaIhEE=__asm.__ZN7IpStack8sendWasmEPN3tcp6SocketERKSt6vectorIhSaIhEE;
+		__ZN7IpStack11connectWasmEPN3tcp6SocketEii=__asm.__ZN7IpStack11connectWasmEPN3tcp6SocketEii;
+		__ZN2ip4stonERKSs=__asm.__ZN2ip4stonERKSs;
+		__ZNSsD2Ev=__asm.__ZNSsD2Ev;
+		__ZNSsC2Ev=__asm.__ZNSsC2Ev;
+		__ZNSs6resizeEj=__asm.__ZNSs6resizeEj;
+		__ZNSsixEj_icf=__asm.__ZNSsixEj_icf;
+		_pbuf_alloc=__asm._pbuf_alloc;
+		__Z22copy_to_pbuf_and_inputP4pbufRKSt6vectorIhSaIhEE=__asm.__Z22copy_to_pbuf_and_inputP4pbufRKSt6vectorIhSaIhEE;
+		__Z4downv=__asm.__Z4downv;
+		__ZNSt13unordered_mapISsSsSt4hashISsESt8equal_toISsESaISt4pairIKSsSsEEEC2Ev=__asm.__ZNSt13unordered_mapISsSsSt4hashISsESt8equal_toISsESaISt4pairIKSsSsEEEC2Ev;
+		__ZNSt13unordered_mapISsSsSt4hashISsESt8equal_toISsESaISt4pairIKSsSsEEE7emplaceIJSsSsEEES4_ISt19__hash_map_iteratorISt15__hash_iteratorIPSt11__hash_nodeISt17__hash_value_typeISsSsEPvEEEbEDpOT_=__asm.__ZNSt13unordered_mapISsSsSt4hashISsESt8equal_toISsESaISt4pairIKSsSsEEE7emplaceIJSsSsEEES4_ISt19__hash_map_iteratorISt15__hash_iteratorIPSt11__hash_nodeISt17__hash_value_typeISsSsEPvEEEbEDpOT_;
+		__Z2upRKSsRKSt13unordered_mapISsSsSt4hashISsESt8equal_toISsESaISt4pairIS_SsEEE=__asm.__Z2upRKSsRKSt13unordered_mapISsSsSt4hashISsESt8equal_toISsESaISt4pairIS_SsEEE;
+		__ZNSt13unordered_mapISsSsSt4hashISsESt8equal_toISsESaISt4pairIKSsSsEEED2Ev=__asm.__ZNSt13unordered_mapISsSsSt4hashISsESt8equal_toISsESaISt4pairIKSsSsEEED2Ev;
+		__Z4initv=__asm.__Z4initv;
+		__Z16udpecho_raw_initv=__asm.__Z16udpecho_raw_initv;
+		__Z16tcpecho_raw_initv=__asm.__Z16tcpecho_raw_initv;
+		_sys_check_timeouts=__asm._sys_check_timeouts;
+		_free=__asm._free;
+		___getStackPtr=__asm.___getStackPtr;
+		___setStackPtr=__asm.___setStackPtr;
+		IpStack.bind=__ZN7IpStack4bindEi;
+		IpStack.connect=__ZN7IpStack7connectEiii;
+		IpStack.down=__ZN7IpStack4downEv;
+		IpStack.init=__ZN7IpStack4initEPN6client9UpOptionsE;
+		IpStack.input=__ZN7IpStack5inputEPN6client10Uint8ArrayE;
+		IpStack.listen=__ZN7IpStack6listenEi;
+		IpStack.output=__ZN7IpStack6outputEPFvPN6client10Uint8ArrayEE;
+		IpStack.parseIP=__ZN7IpStack7parseIPEPN6client6StringE;
+		IpStack.up=__ZN7IpStack2upEPN6client9UpOptionsE;
+		__start();
+		return{
+			IpStack:IpStack,
+		};
+	});
+}
+function assignHeaps(Lh){
+	HEAP8=new Uint8Array(Lh);
+	HEAP32=new Int32Array(Lh);
+}

tun/tailscale_tun.js

@@ -0,0 +1,93 @@
+import "./wasm_exec.js";
+
+import ipStackAwait from "./ipstack.js";
+
+export async function init({ stateUpdateCb, netMapCb, loginUrlCb })
+{
+	const {IpStack} = await ipStackAwait();
+
+	const wasmUrl = new URL("tailscale.wasm", import.meta.url);
+	const go = new window.Go();
+	let {instance} = await WebAssembly.instantiateStreaming(fetch(wasmUrl),go.importObject);
+	go.run(instance);
+
+	const State = {
+		NoState: 0,
+		InUseOtherUser: 1,
+		NeedsLogin: 2,
+		NeedsMachineAuth: 3,
+		Stopped: 4,
+		Starting: 5,
+		Running: 6,
+	};
+
+
+	const sessionStateStorage = {
+		setState(id, value) {
+		window.sessionStorage[`ipn-state-${id}`] = value
+		},
+		getState(id) {
+		return window.sessionStorage[`ipn-state-${id}`] || ""
+		},
+	}
+
+	const ipn = newIPN({
+		// Persist IPN state in sessionStorage in development, so that we don't need
+		// to re-authorize every time we reload the page.
+		stateStorage: sessionStateStorage,
+	});
+
+	const setupIpStack = () => {
+		ipn.tun.onmessage = function(ev) {
+		console.log("received on tun:", ev.data)
+		IpStack.input(ev.data)
+		};
+		IpStack.output(function(p){
+		console.log("sending from tun:", p)
+		ipn.tun.postMessage(p);
+		});
+		IpStack.init();
+	};
+	setupIpStack();
+
+	let localIp = null;
+	let dnsIp = null;
+
+	ipn.run({
+		notifyState: stateUpdateCb,
+		notifyNetMap: (s) => {
+			const netMap = JSON.parse(s);
+			if (netMapCb)
+				netMapCb(netMap);
+			const newLocalIp = netMap.self.addresses[0];
+			if (localIp != newLocalIp)
+			{
+				localIp = newLocalIp;
+				IpStack.up({localIp, ipMap: {
+					["127.0.0.53"]: dnsIp,
+					[dnsIp]: "127.0.0.53",
+				}});
+			}
+		},
+		notifyBrowseToURL: loginUrlCb,
+	});
+
+	return {
+		connect: IpStack.connect,
+		listen: IpStack.listen,
+		bind: IpStack.bind,
+		parseIP: IpStack.parseIP,
+		up: (conf) => {
+			ipn.up(conf);
+			localIp = null;
+			dnsIp = conf.dnsIp || "127.0.0.53";
+		},
+		down: () => {
+			ipn.down();
+			IpStack.down();
+		},
+		login: () => ipn.login(),
+		logout: () => ipn.logout(),
+	};
+}
+

tun/tailscale_tun_ui.js

@@ -0,0 +1,210 @@
+const State = {
+	NoState: 0,
+	InUseOtherUser: 1,
+	NeedsLogin: 2,
+	NeedsMachineAuth: 3,
+	Stopped: 4,
+	Starting: 5,
+	Running: 6,
+};
+export const createUi = (parent, {upCb,downCb,loginCb,logoutCb}) => {
+	const html = `
+<div id="networkModalOverlay" style="width:100%;height:100vh;position:absolute;display:none ;align-items:center;justify-content:center;background:rgba(0,0,0,0.7);color:black;z-index:100">
+	<div id="networkModal" style="max-width:650px;width:100%;background:white;height:400px;display:flex;flex-direction:row;padding:10px;justify-content:space-around">
+
+        <div class="networkModalLeft">
+			<h2>Network Configuration</h2>
+			<form id="networkModalForm">
+				<label for="controlUrl">Control URL: </label>
+				<input type="text" id="controlUrl" name="controlUrl"><br><br>
+				<label for="exitNode">Exit Node: </label>
+				<input type="text" id="exitNode" name="exitNode"><br><br>
+				<label for="dns">DNS Server: </label>
+				<input type="text" id="dns" name="dns"><br><br>
+				<button type="submit">Save</button>
+			</form>
+			<h2>Network Status</h2>
+			<div id="networkModalState">Disconnected</div>
+			<div id="networkModalAction"></div>
+		</div>
+
+		<div class="networkModalRight">
+			<h2>Peers</h2>
+			<div id="networkModalPeers"></div>
+		</div>
+	</div>
+</div>
+`;
+	const templ = document.createElement("template");
+	templ.innerHTML = html;
+	parent.prepend(templ.content);
+
+	const overlay = parent.querySelector("#networkModalOverlay");
+	const form = parent.querySelector("#networkModalForm");
+	const stateDiv = parent.querySelector("#networkModalState");
+	const actionDiv = parent.querySelector("#networkModalAction");
+	const peersDiv = parent.querySelector("#networkModalPeers");
+
+	const getSettings = () => {
+		const str = window.localStorage["networkSettings"] || "{}";
+		const v = JSON.parse(str);
+		return v;
+	};
+	const setSetting = (settings) => {
+		for (const k of Object.keys(settings))
+		{
+			if (settings[k] === "")
+				settings[k] = undefined;
+		}
+		window.localStorage["networkSettings"] = JSON.stringify(settings);
+	}
+	const populate = () => {
+		const settings = getSettings();
+		form.querySelector("#controlUrl").value = settings.controlUrl || "";
+		form.querySelector("#exitNode").value = settings.exitNodeIp || "";
+		form.querySelector("#dns").value = settings.dnsIp || "";
+	};
+	populate();
+
+	const showModal = () => {
+		overlay.style.display = "flex";
+	};
+	const hideModal = () => {
+		overlay.style.display = "none";
+	};
+	overlay.onclick = (e) => {
+		if (e.target === e.currentTarget)
+			hideModal();
+	};
+
+	form.onsubmit = (e) => {
+		e.preventDefault();
+		const settings = {
+			controlUrl: form.elements["controlUrl"].value,
+			exitNodeIp: form.elements["exitNode"].value,
+			dnsIp: form.elements["dns"].value,
+		};
+		setSetting(settings);
+	};
+
+	const updateState = (state) => {
+		switch(state)
+		{
+			case State.NeedsLogin:
+			{
+				loginCb();
+				break;
+			}
+			case State.Running:
+			{
+				const settings = getSettings();
+				settings.wantsRunning = true;
+				setSetting(settings);
+
+				stateDiv.innerHTML = "Running";
+				const action = document.createElement("button");
+				action.textContent = "Stop";
+				action.onclick = () => {
+					downCb();
+					action.disabled = true;
+				}
+				actionDiv.innerHTML = "";
+				actionDiv.appendChild(action);
+				break;
+			}
+			case State.Starting:
+			{
+				stateDiv.innerHTML = "Starting";
+				actionDiv.innerHTML = "";
+				break;
+			}
+			case State.Stopped:
+			{
+				const settings = getSettings();
+				settings.wantsRunning = false;
+				setSetting(settings);
+
+				stateDiv.innerHTML = "Stopped";
+				const actionLogout = document.createElement("button");
+				const actionStart = document.createElement("button");
+				actionStart.textContent = "Start";
+				actionStart.onclick = () => {
+					const settings = getSettings();
+					upCb(settings);
+					actionStart.disabled = true;
+					actionLogout.disabled = true;
+				}
+				actionLogout.textContent = "Logout";
+				actionLogout.onclick = () => {
+					logoutCb();
+					actionStart.disabled = true;
+					actionLogout.disabled = true;
+				}
+				actionDiv.innerHTML = "";
+				actionDiv.appendChild(actionStart);
+				actionDiv.appendChild(actionLogout);
+				break;
+			}
+			case State.NoState:
+			{
+				stateDiv.innerHTML = "Not Started";
+				const action = document.createElement("button");
+				action.textContent = "Start";
+				action.onclick = () => {
+					const settings = getSettings();
+					upCb(settings);
+					action.disabled = true;
+				}
+				actionDiv.innerHTML = "";
+				actionDiv.appendChild(action);
+				setTimeout(()=> {
+					const settings = getSettings();
+					if (settings.wantsRunning)
+					{
+						upCb(settings);
+						action.disabled = true;
+						return;
+					}
+				},0);
+				break;
+			}
+			default:
+			{
+				console.log(state);
+				stateDiv.innerHTML = "Loading";
+				actionDiv.innerHTML = "";
+				break;
+			}
+		}
+	};
+
+	const setLoginUrl = (login) => {
+		console.log("login url:",login);
+		stateDiv.innerHTML = "Need Login";
+		const action = document.createElement("button");
+		action.textContent = "Login";
+		action.onclick = () => {
+			window.open(login, "_blank");
+		}
+		actionDiv.innerHTML = "";
+		actionDiv.appendChild(action);
+	};
+
+	const updatePeers = (map) => {
+		const myIP = map.self.addresses[0];
+		let peers = `self -> ${myIP}<br/>`;
+		for (let p of map.peers) {
+			peers = `${peers}${p.name.split(".")[0]} -> ${p.addresses[0]}<br/>`;
+		}
+		peersDiv.innerHTML = peers;
+	};
+
+	return {
+		showModal,
+		updateState,
+		updatePeers,
+		setLoginUrl,
+		getSettings,
+	}
+}
+

tun/wasm_exec.js

@@ -0,0 +1,554 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+"use strict";
+
+(() => {
+	const enosys = () => {
+		const err = new Error("not implemented");
+		err.code = "ENOSYS";
+		return err;
+	};
+
+	if (!globalThis.fs) {
+		let outputBuf = "";
+		globalThis.fs = {
+			constants: { O_WRONLY: -1, O_RDWR: -1, O_CREAT: -1, O_TRUNC: -1, O_APPEND: -1, O_EXCL: -1 }, // unused
+			writeSync(fd, buf) {
+				outputBuf += decoder.decode(buf);
+				const nl = outputBuf.lastIndexOf("\n");
+				if (nl != -1) {
+					console.log(outputBuf.substr(0, nl));
+					outputBuf = outputBuf.substr(nl + 1);
+				}
+				return buf.length;
+			},
+			write(fd, buf, offset, length, position, callback) {
+				if (offset !== 0 || length !== buf.length || position !== null) {
+					callback(enosys());
+					return;
+				}
+				const n = this.writeSync(fd, buf);
+				callback(null, n);
+			},
+			chmod(path, mode, callback) { callback(enosys()); },
+			chown(path, uid, gid, callback) { callback(enosys()); },
+			close(fd, callback) { callback(enosys()); },
+			fchmod(fd, mode, callback) { callback(enosys()); },
+			fchown(fd, uid, gid, callback) { callback(enosys()); },
+			fstat(fd, callback) { callback(enosys()); },
+			fsync(fd, callback) { callback(null); },
+			ftruncate(fd, length, callback) { callback(enosys()); },
+			lchown(path, uid, gid, callback) { callback(enosys()); },
+			link(path, link, callback) { callback(enosys()); },
+			lstat(path, callback) { callback(enosys()); },
+			mkdir(path, perm, callback) { callback(enosys()); },
+			open(path, flags, mode, callback) { callback(enosys()); },
+			read(fd, buffer, offset, length, position, callback) { callback(enosys()); },
+			readdir(path, callback) { callback(enosys()); },
+			readlink(path, callback) { callback(enosys()); },
+			rename(from, to, callback) { callback(enosys()); },
+			rmdir(path, callback) { callback(enosys()); },
+			stat(path, callback) { callback(enosys()); },
+			symlink(path, link, callback) { callback(enosys()); },
+			truncate(path, length, callback) { callback(enosys()); },
+			unlink(path, callback) { callback(enosys()); },
+			utimes(path, atime, mtime, callback) { callback(enosys()); },
+		};
+	}
+
+	if (!globalThis.process) {
+		globalThis.process = {
+			getuid() { return -1; },
+			getgid() { return -1; },
+			geteuid() { return -1; },
+			getegid() { return -1; },
+			getgroups() { throw enosys(); },
+			pid: -1,
+			ppid: -1,
+			umask() { throw enosys(); },
+			cwd() { throw enosys(); },
+			chdir() { throw enosys(); },
+		}
+	}
+
+	if (!globalThis.crypto) {
+		throw new Error("globalThis.crypto is not available, polyfill required (crypto.getRandomValues only)");
+	}
+
+	if (!globalThis.performance) {
+		throw new Error("globalThis.performance is not available, polyfill required (performance.now only)");
+	}
+
+	if (!globalThis.TextEncoder) {
+		throw new Error("globalThis.TextEncoder is not available, polyfill required");
+	}
+
+	if (!globalThis.TextDecoder) {
+		throw new Error("globalThis.TextDecoder is not available, polyfill required");
+	}
+
+	const encoder = new TextEncoder("utf-8");
+	const decoder = new TextDecoder("utf-8");
+
+	globalThis.Go = class {
+		constructor() {
+			this.argv = ["js"];
+			this.env = {};
+			this.exit = (code) => {
+				if (code !== 0) {
+					console.warn("exit code:", code);
+				}
+			};
+			this._exitPromise = new Promise((resolve) => {
+				this._resolveExitPromise = resolve;
+			});
+			this._pendingEvent = null;
+			this._scheduledTimeouts = new Map();
+			this._nextCallbackTimeoutID = 1;
+
+			const setInt64 = (addr, v) => {
+				this.mem.setUint32(addr + 0, v, true);
+				this.mem.setUint32(addr + 4, Math.floor(v / 4294967296), true);
+			}
+
+			const getInt64 = (addr) => {
+				const low = this.mem.getUint32(addr + 0, true);
+				const high = this.mem.getInt32(addr + 4, true);
+				return low + high * 4294967296;
+			}
+
+			const loadValue = (addr) => {
+				const f = this.mem.getFloat64(addr, true);
+				if (f === 0) {
+					return undefined;
+				}
+				if (!isNaN(f)) {
+					return f;
+				}
+
+				const id = this.mem.getUint32(addr, true);
+				return this._values[id];
+			}
+
+			const storeValue = (addr, v) => {
+				const nanHead = 0x7FF80000;
+
+				if (typeof v === "number" && v !== 0) {
+					if (isNaN(v)) {
+						this.mem.setUint32(addr + 4, nanHead, true);
+						this.mem.setUint32(addr, 0, true);
+						return;
+					}
+					this.mem.setFloat64(addr, v, true);
+					return;
+				}
+
+				if (v === undefined) {
+					this.mem.setFloat64(addr, 0, true);
+					return;
+				}
+
+				let id = this._ids.get(v);
+				if (id === undefined) {
+					id = this._idPool.pop();
+					if (id === undefined) {
+						id = this._values.length;
+					}
+					this._values[id] = v;
+					this._goRefCounts[id] = 0;
+					this._ids.set(v, id);
+				}
+				this._goRefCounts[id]++;
+				let typeFlag = 0;
+				switch (typeof v) {
+					case "object":
+						if (v !== null) {
+							typeFlag = 1;
+						}
+						break;
+					case "string":
+						typeFlag = 2;
+						break;
+					case "symbol":
+						typeFlag = 3;
+						break;
+					case "function":
+						typeFlag = 4;
+						break;
+				}
+				this.mem.setUint32(addr + 4, nanHead | typeFlag, true);
+				this.mem.setUint32(addr, id, true);
+			}
+
+			const loadSlice = (addr) => {
+				const array = getInt64(addr + 0);
+				const len = getInt64(addr + 8);
+				return new Uint8Array(this._inst.exports.mem.buffer, array, len);
+			}
+
+			const loadSliceOfValues = (addr) => {
+				const array = getInt64(addr + 0);
+				const len = getInt64(addr + 8);
+				const a = new Array(len);
+				for (let i = 0; i < len; i++) {
+					a[i] = loadValue(array + i * 8);
+				}
+				return a;
+			}
+
+			const loadString = (addr) => {
+				const saddr = getInt64(addr + 0);
+				const len = getInt64(addr + 8);
+				return decoder.decode(new DataView(this._inst.exports.mem.buffer, saddr, len));
+			}
+
+			const timeOrigin = Date.now() - performance.now();
+			this.importObject = {
+				go: {
+					// Go's SP does not change as long as no Go code is running. Some operations (e.g. calls, getters and setters)
+					// may synchronously trigger a Go event handler. This makes Go code get executed in the middle of the imported
+					// function. A goroutine can switch to a new stack if the current stack is too small (see morestack function).
+					// This changes the SP, thus we have to update the SP used by the imported function.
+
+					// func wasmExit(code int32)
+					"runtime.wasmExit": (sp) => {
+						sp >>>= 0;
+						const code = this.mem.getInt32(sp + 8, true);
+						this.exited = true;
+						delete this._inst;
+						delete this._values;
+						delete this._goRefCounts;
+						delete this._ids;
+						delete this._idPool;
+						this.exit(code);
+					},
+
+					// func wasmWrite(fd uintptr, p unsafe.Pointer, n int32)
+					"runtime.wasmWrite": (sp) => {
+						sp >>>= 0;
+						const fd = getInt64(sp + 8);
+						const p = getInt64(sp + 16);
+						const n = this.mem.getInt32(sp + 24, true);
+						fs.writeSync(fd, new Uint8Array(this._inst.exports.mem.buffer, p, n));
+					},
+
+					// func resetMemoryDataView()
+					"runtime.resetMemoryDataView": (sp) => {
+						sp >>>= 0;
+						this.mem = new DataView(this._inst.exports.mem.buffer);
+					},
+
+					// func nanotime1() int64
+					"runtime.nanotime1": (sp) => {
+						sp >>>= 0;
+						setInt64(sp + 8, (timeOrigin + performance.now()) * 1000000);
+					},
+
+					// func walltime() (sec int64, nsec int32)
+					"runtime.walltime": (sp) => {
+						sp >>>= 0;
+						const msec = (new Date).getTime();
+						setInt64(sp + 8, msec / 1000);
+						this.mem.setInt32(sp + 16, (msec % 1000) * 1000000, true);
+					},
+
+					// func scheduleTimeoutEvent(delay int64) int32
+					"runtime.scheduleTimeoutEvent": (sp) => {
+						sp >>>= 0;
+						const id = this._nextCallbackTimeoutID;
+						this._nextCallbackTimeoutID++;
+						this._scheduledTimeouts.set(id, setTimeout(
+							() => {
+								this._resume();
+								while (this._scheduledTimeouts.has(id)) {
+									// for some reason Go failed to register the timeout event, log and try again
+									// (temporary workaround for https://github.com/golang/go/issues/28975)
+									console.warn("scheduleTimeoutEvent: missed timeout event");
+									this._resume();
+								}
+							},
+							getInt64(sp + 8) + 1, // setTimeout has been seen to fire up to 1 millisecond early
+						));
+						this.mem.setInt32(sp + 16, id, true);
+					},
+
+					// func clearTimeoutEvent(id int32)
+					"runtime.clearTimeoutEvent": (sp) => {
+						sp >>>= 0;
+						const id = this.mem.getInt32(sp + 8, true);
+						clearTimeout(this._scheduledTimeouts.get(id));
+						this._scheduledTimeouts.delete(id);
+					},
+
+					// func getRandomData(r []byte)
+					"runtime.getRandomData": (sp) => {
+						sp >>>= 0;
+						crypto.getRandomValues(loadSlice(sp + 8));
+					},
+
+					// func finalizeRef(v ref)
+					"syscall/js.finalizeRef": (sp) => {
+						sp >>>= 0;
+						const id = this.mem.getUint32(sp + 8, true);
+						this._goRefCounts[id]--;
+						if (this._goRefCounts[id] === 0) {
+							const v = this._values[id];
+							this._values[id] = null;
+							this._ids.delete(v);
+							this._idPool.push(id);
+						}
+					},
+
+					// func stringVal(value string) ref
+					"syscall/js.stringVal": (sp) => {
+						sp >>>= 0;
+						storeValue(sp + 24, loadString(sp + 8));
+					},
+
+					// func valueGet(v ref, p string) ref
+					"syscall/js.valueGet": (sp) => {
+						sp >>>= 0;
+						const result = Reflect.get(loadValue(sp + 8), loadString(sp + 16));
+						sp = this._inst.exports.getsp() >>> 0; // see comment above
+						storeValue(sp + 32, result);
+					},
+
+					// func valueSet(v ref, p string, x ref)
+					"syscall/js.valueSet": (sp) => {
+						sp >>>= 0;
+						Reflect.set(loadValue(sp + 8), loadString(sp + 16), loadValue(sp + 32));
+					},
+
+					// func valueDelete(v ref, p string)
+					"syscall/js.valueDelete": (sp) => {
+						sp >>>= 0;
+						Reflect.deleteProperty(loadValue(sp + 8), loadString(sp + 16));
+					},
+
+					// func valueIndex(v ref, i int) ref
+					"syscall/js.valueIndex": (sp) => {
+						sp >>>= 0;
+						storeValue(sp + 24, Reflect.get(loadValue(sp + 8), getInt64(sp + 16)));
+					},
+
+					// valueSetIndex(v ref, i int, x ref)
+					"syscall/js.valueSetIndex": (sp) => {
+						sp >>>= 0;
+						Reflect.set(loadValue(sp + 8), getInt64(sp + 16), loadValue(sp + 24));
+					},
+
+					// func valueCall(v ref, m string, args []ref) (ref, bool)
+					"syscall/js.valueCall": (sp) => {
+						sp >>>= 0;
+						try {
+							const v = loadValue(sp + 8);
+							const m = Reflect.get(v, loadString(sp + 16));
+							const args = loadSliceOfValues(sp + 32);
+							const result = Reflect.apply(m, v, args);
+							sp = this._inst.exports.getsp() >>> 0; // see comment above
+							storeValue(sp + 56, result);
+							this.mem.setUint8(sp + 64, 1);
+						} catch (err) {
+							sp = this._inst.exports.getsp() >>> 0; // see comment above
+							storeValue(sp + 56, err);
+							this.mem.setUint8(sp + 64, 0);
+						}
+					},
+
+					// func valueInvoke(v ref, args []ref) (ref, bool)
+					"syscall/js.valueInvoke": (sp) => {
+						sp >>>= 0;
+						try {
+							const v = loadValue(sp + 8);
+							const args = loadSliceOfValues(sp + 16);
+							const result = Reflect.apply(v, undefined, args);
+							sp = this._inst.exports.getsp() >>> 0; // see comment above
+							storeValue(sp + 40, result);
+							this.mem.setUint8(sp + 48, 1);
+						} catch (err) {
+							sp = this._inst.exports.getsp() >>> 0; // see comment above
+							storeValue(sp + 40, err);
+							this.mem.setUint8(sp + 48, 0);
+						}
+					},
+
+					// func valueNew(v ref, args []ref) (ref, bool)
+					"syscall/js.valueNew": (sp) => {
+						sp >>>= 0;
+						try {
+							const v = loadValue(sp + 8);
+							const args = loadSliceOfValues(sp + 16);
+							const result = Reflect.construct(v, args);
+							sp = this._inst.exports.getsp() >>> 0; // see comment above
+							storeValue(sp + 40, result);
+							this.mem.setUint8(sp + 48, 1);
+						} catch (err) {
+							sp = this._inst.exports.getsp() >>> 0; // see comment above
+							storeValue(sp + 40, err);
+							this.mem.setUint8(sp + 48, 0);
+						}
+					},
+
+					// func valueLength(v ref) int
+					"syscall/js.valueLength": (sp) => {
+						sp >>>= 0;
+						setInt64(sp + 16, parseInt(loadValue(sp + 8).length));
+					},
+
+					// valuePrepareString(v ref) (ref, int)
+					"syscall/js.valuePrepareString": (sp) => {
+						sp >>>= 0;
+						const str = encoder.encode(String(loadValue(sp + 8)));
+						storeValue(sp + 16, str);
+						setInt64(sp + 24, str.length);
+					},
+
+					// valueLoadString(v ref, b []byte)
+					"syscall/js.valueLoadString": (sp) => {
+						sp >>>= 0;
+						const str = loadValue(sp + 8);
+						loadSlice(sp + 16).set(str);
+					},
+
+					// func valueInstanceOf(v ref, t ref) bool
+					"syscall/js.valueInstanceOf": (sp) => {
+						sp >>>= 0;
+						this.mem.setUint8(sp + 24, (loadValue(sp + 8) instanceof loadValue(sp + 16)) ? 1 : 0);
+					},
+
+					// func copyBytesToGo(dst []byte, src ref) (int, bool)
+					"syscall/js.copyBytesToGo": (sp) => {
+						sp >>>= 0;
+						const dst = loadSlice(sp + 8);
+						const src = loadValue(sp + 32);
+						if (!(src instanceof Uint8Array || src instanceof Uint8ClampedArray)) {
+							this.mem.setUint8(sp + 48, 0);
+							return;
+						}
+						const toCopy = src.subarray(0, dst.length);
+						dst.set(toCopy);
+						setInt64(sp + 40, toCopy.length);
+						this.mem.setUint8(sp + 48, 1);
+					},
+
+					// func copyBytesToJS(dst ref, src []byte) (int, bool)
+					"syscall/js.copyBytesToJS": (sp) => {
+						sp >>>= 0;
+						const dst = loadValue(sp + 8);
+						const src = loadSlice(sp + 16);
+						if (!(dst instanceof Uint8Array || dst instanceof Uint8ClampedArray)) {
+							this.mem.setUint8(sp + 48, 0);
+							return;
+						}
+						const toCopy = src.subarray(0, dst.length);
+						dst.set(toCopy);
+						setInt64(sp + 40, toCopy.length);
+						this.mem.setUint8(sp + 48, 1);
+					},
+
+					"debug": (value) => {
+						console.log(value);
+					},
+				}
+			};
+		}
+
+		async run(instance) {
+			if (!(instance instanceof WebAssembly.Instance)) {
+				throw new Error("Go.run: WebAssembly.Instance expected");
+			}
+			this._inst = instance;
+			this.mem = new DataView(this._inst.exports.mem.buffer);
+			this._values = [ // JS values that Go currently has references to, indexed by reference id
+				NaN,
+				0,
+				null,
+				true,
+				false,
+				globalThis,
+				this,
+			];
+			this._goRefCounts = new Array(this._values.length).fill(Infinity); // number of references that Go has to a JS value, indexed by reference id
+			this._ids = new Map([ // mapping from JS values to reference ids
+				[0, 1],
+				[null, 2],
+				[true, 3],
+				[false, 4],
+				[globalThis, 5],
+				[this, 6],
+			]);
+			this._idPool = [];   // unused ids that have been garbage collected
+			this.exited = false; // whether the Go program has exited
+
+			// Pass command line arguments and environment variables to WebAssembly by writing them to the linear memory.
+			let offset = 4096;
+
+			const strPtr = (str) => {
+				const ptr = offset;
+				const bytes = encoder.encode(str + "\0");
+				new Uint8Array(this.mem.buffer, offset, bytes.length).set(bytes);
+				offset += bytes.length;
+				if (offset % 8 !== 0) {
+					offset += 8 - (offset % 8);
+				}
+				return ptr;
+			};
+
+			const argc = this.argv.length;
+
+			const argvPtrs = [];
+			this.argv.forEach((arg) => {
+				argvPtrs.push(strPtr(arg));
+			});
+			argvPtrs.push(0);
+
+			const keys = Object.keys(this.env).sort();
+			keys.forEach((key) => {
+				argvPtrs.push(strPtr(`${key}=${this.env[key]}`));
+			});
+			argvPtrs.push(0);
+
+			const argv = offset;
+			argvPtrs.forEach((ptr) => {
+				this.mem.setUint32(offset, ptr, true);
+				this.mem.setUint32(offset + 4, 0, true);
+				offset += 8;
+			});
+
+			// The linker guarantees global data starts from at least wasmMinDataAddr.
+			// Keep in sync with cmd/link/internal/ld/data.go:wasmMinDataAddr.
+			const wasmMinDataAddr = 4096 + 8192;
+			if (offset >= wasmMinDataAddr) {
+				throw new Error("total length of command line and environment variables exceeds limit");
+			}
+
+			this._inst.exports.run(argc, argv);
+			if (this.exited) {
+				this._resolveExitPromise();
+			}
+			await this._exitPromise;
+		}
+
+		_resume() {
+			if (this.exited) {
+				throw new Error("Go program has already exited");
+			}
+			this._inst.exports.resume();
+			if (this.exited) {
+				this._resolveExitPromise();
+			}
+		}
+
+		_makeFuncWrapper(id) {
+			const go = this;
+			return function () {
+				const event = { id: id, this: this, args: arguments };
+				go._pendingEvent = event;
+				go._resume();
+				return event.result;
+			};
+		}
+	}
+})();