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_socket.ahk
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; Socket class
; Big thanks to GeekDude for remaking this.
; Original script by GeekDude: https://github.com/G33kDude/Socket.ahk/blob/master/Socket.ahk
; AHK Forum Post by GeekDude: https://www.autohotkey.com/boards/viewtopic.php?f=6&t=35120
;
; And thanks to Bentschi's work which GeekDude expanded on.
; https://autohotkey.com/board/topic/94376-socket-class-%C3%BCberarbeitet/
;
; Helpful info:
; Event Objects vs ComplitionIO ports
; https://stackoverflow.com/questions/44664511/windows-event-based-overlapped-io-vs-io-completion-ports-real-world-performanc
;
; Thanks to winsockdotnetworkprogramming.com
; https://www.winsocketdotnetworkprogramming.com/winsock2programming/winsock2advancediomethod5g.html
; - this gave a workaround for using overlapped I/O
;
; MS Help Docs:
;
; =====================================================================================================
;
;
class winsock {
Static sockets := Map(), wm_msg := 0x9987
Static __New() { ; init WS2 lib on script start
invert("family","family_2") ; for looking up family name by number
this.hModule := DllCall("LoadLibrary", "Str", "Ws2_32", "UPtr")
this.WSAData := Buffer(394+A_PtrSize)
if (Err := DllCall("Ws2_32\WSAStartup", "UShort", 0x0202, "UPtr", this.WSAData.ptr))
throw Error("Error starting Winsock",, Err)
if (NumGet(this.WSAData, 2, "UShort") != 0x0202)
throw Error("Winsock version 2.2 not available")
this.socketMonitor := ObjBindMethod(this,"WM_SOCKET")
OnMessage(this.wm_msg,this.socketMonitor) ; 0x9987
this.sockaddr.Prototype.DefineProp("insert" ,{Call:(o,buf,dest)=>insert(buf,dest)})
this.sockaddr.Prototype.DefineProp("extract",{Call:(o,src,len)=>extract(src,len)})
insert(buf,dest) => DllCall("RtlCopyMemory","UPtr",dest,"UPtr",buf.ptr,"UPtr",buf.size)
extract(src,len) {
buf := Buffer(len,0)
DllCall("RtlCopyMemory","UPtr",buf.ptr,"UPtr",src,"UPtr",len)
return buf
}
invert(name,name_2) {
this.%name_2% := {}
For name, value in this.%name%.OwnProps()
this.%name_2%.%value% := name
}
}
Static flags := { Passive:0x1 , NumericHost:0x4 , Secure:0x8000 , NonAuthoritative:0x4000
, CanonName:0x2 , AddrConfig:0x400 , FQDN:0x20000, ReturnPreferredNames:0x10000
, V4Mapped:0x800, FileServer:0x40000, All:0x100}
, family := {Unspec:0, IPV4:2, NetBIOS:17, IPv6:23, IRDA:26, BTH:32}
, fam_size := {Unspec:-1, IPv4:16,NetBIOS:-1, IPv6:28,IRDA:-1, BTH:-1}
, fam_len := {Unspec:-1, IPv4:4, NetBIOS:-1, IPv6:8, IRDA:-1, BTH:-1}
, fam_addr_off := {Unspec:-1, IPv4:4, NetBIOS:-1, IPv6:8, IRDA:-1, BTH:-1}
, socktype := {Stream:1, DGram:2, RAW:3, RDM:4, SeqPacket:5}
, protocol := {TCP:6, UDP:17, RM:113}
, events := {1:"Read",2:"Write",4:"OOB",8:"Accept",16:"Connect",32:"Close",64:"QOS"
,128:"GroupQOS",256:"RoutingInterfaceChange",512:"AddressListChange"}
, errors := {6:"WSA_INVALID_HANDLE", 8:"WSA_NOT_ENOUGH_MEMORY", 87:"WSA_INVALID_PARAMETER", 995:"WSA_OPERATION_ABORTED"
, 996:"WSA_IO_INCOMPLETE", 997:"WSA_IO_PENDING", 10004:"WSAEINTR", 10009:"WSAEBADF", 10013:"WSAEACCES"
, 10014:"WSAEFAULT", 10022:"WSAEINVAL", 10024:"WSAEMFILE", 10035:"WSAEWOULDBLOCK", 10036:"WSAEINPROGRESS"
, 10037:"WSAEALREADY", 10038:"WSAENOTSOCK", 10039:"WSAEDESTADDRREQ", 10040:"WSAEMSGSIZE", 10041:"WSAEPROTOTYPE"
, 10042:"WSAENOPROTOOPT", 10043:"WSAEPROTONOSUPPORT", 10044:"WSAESOCKTNOSUPPORT", 10045:"WSAEOPNOTSUPP"
, 10046:"WSAEPFNOSUPPORT", 10047:"WSAEAFNOSUPPORT", 10048:"WSAEADDRINUSE", 10049:"WSAEADDRNOTAVAIL", 10050:"WSAENETDOWN"
, 10051:"WSAENETUNREACH", 10052:"WSAENETRESET", 10053:"WSAECONNABORTED", 10054:"WSAECONNRESET", 10055:"WSAENOBUFS"
, 10056:"WSAEISCONN", 10057:"WSAENOTCONN", 10058:"WSAESHUTDOWN", 10059:"WSAETOOMANYREFS", 10060:"WSAETIMEDOUT"
, 10061:"WSAECONNREFUSED", 10062:"WSAELOOP", 10063:"WSAENAMETOOLONG", 10064:"WSAEHOSTDOWN", 10065:"WSAEHOSTUNREACH"
, 10066:"WSAENOTEMPTY", 10067:"WSAEPROCLIM", 10068:"WSAEUSERS", 10069:"WSAEDQUOT", 10070:"WSAESTALE", 10071:"WSAEREMOTE"
, 10091:"WSASYSNOTREADY", 10092:"WSAVERNOTSUPPORTED", 10093:"WSANOTINITIALISED", 10101:"WSAEDISCON", 10102:"WSAENOMORE"
, 10103:"WSAECANCELLED", 10104:"WSAEINVALIDPROCTABLE", 10105:"WSAEINVALIDPROVIDER", 10106:"WSAEPROVIDERFAILEDINIT"
, 10107:"WSASYSCALLFAILURE", 10108:"WSASERVICE_NOT_FOUND", 10109:"WSATYPE_NOT_FOUND", 10110:"WSA_E_NO_MORE"
, 10111:"WSA_E_CANCELLED", 10112:"WSAEREFUSED", 11001:"WSAHOST_NOT_FOUND", 11002:"WSATRY_AGAIN", 11003:"WSANO_RECOVERY"
, 11004:"WSANO_DATA", 11005:"WSA_QOS_RECEIVERS", 11006:"WSA_QOS_SENDERS", 11007:"WSA_QOS_NO_SENDERS", 11008:"WSA_QOS_NO_RECEIVERS"
, 11009:"WSA_QOS_REQUEST_CONFIRMED", 11010:"WSA_QOS_ADMISSION_FAILURE", 11011:"WSA_QOS_POLICY_FAILURE", 11012:"WSA_QOS_BAD_STYLE"
, 11013:"WSA_QOS_BAD_OBJECT", 11014:"WSA_QOS_TRAFFIC_CTRL_ERROR", 11015:"WSA_QOS_GENERIC_ERROR", 11016:"WSA_QOS_ESERVICETYPE"
, 11017:"WSA_QOS_EFLOWSPEC", 11018:"WSA_QOS_EPROVSPECBUF", 11019:"WSA_QOS_EFILTERSTYLE", 11020:"WSA_QOS_EFILTERTYPE"
, 11021:"WSA_QOS_EFILTERCOUNT", 11022:"WSA_QOS_EOBJLENGTH", 11023:"WSA_QOS_EFLOWCOUNT", 11024:"WSA_QOS_EUNKOWNPSOBJ"
, 11025:"WSA_QOS_EPOLICYOBJ", 11026:"WSA_QOS_EFLOWDESC", 11027:"WSA_QOS_EPSFLOWSPEC", 11028:"WSA_QOS_EPSFILTERSPEC"
, 11029:"WSA_QOS_ESDMODEOBJ", 11030:"WSA_QOS_ESHAPERATEOBJ", 11031:"WSA_QOS_RESERVED_PETYPE"}
Static WM_SOCKET(sockDesc, lParam, msg, hwnd) { ; socket monitor
event_cd := lParam & 0xFFFF
errCode := (lParam >> 16) & 0xFFFF
event := (winsock.events.HasProp(event_cd) ? winsock.events.%event_cd% : event_cd)
socket := winsock.sockets[String(sockDesc)]
cb := socket.cb
If (event="Connect") {
socket.statusCode := errCode
If !(errCode)
socket.ConnectFinish(), socket.status := "Connected"
Else If socket.ConAddrStruct.next
socket.ConnectNext() ; try next addr from GetAddrInfo
Else If !socket.ConAddrStruct.next {
socket.status := "Failed", socket.ConnectFinish() ; all addresses tried, and failed
socket.addr := 0, socket.port := 0, socket.ConAddrIndex := 0
}
}
if (cb)
cb(socket,event,errCode)
}
family := 0, protocol := 0, socktype := 0
callback := 0, desc := -1, name := ""
err := "", errnum := 0, LastOp := ""
host := "", port := 0, addr := "", status := "", statusCode := 0
ConAddrStruct := 0, ConAddrIndex := 0, ConAddrRoot := 0
block := false ; internal, don't use directly, use this.blocking
; sock := {name:"client", family:"Unspec", protocol:"TCP", type:"Stream", block:false, callback:fnc} ; init obj??
__New(name, callback:=0, family:="Unspec", protocol:="TCP", socktype:="Stream", desc:=-1) {
this.name := name, this.desc := desc, this.cb := callback
If !winsock.family.HasProp(family) ; IPV4:2, NetBIOS:17, IPV6:23, IRDA:26, BTH:32
throw Error("Invalid socket family specified.",-1,"Valid values are:`n`nIPV4,IPV6,NetBIOS,IRDA,BTH")
this.family := winsock.family.%family% , this.familyName := family
this.socktype := winsock.socktype.%socktype%, this.socktypeName := socktype
this.protocol := winsock.protocol.%protocol%, this.protocolName := protocol
if !this.CreateSocket(this.desc)
throw Error("Error creating socket.",-1,"Error Code: " this.errnum " / " this.err "`nLast Op: " this.LastOp)
else
winsock.sockets[String(this.desc)] := this
}
Accept(&addr:=0,&newsock:=0,block:=false) { ; optional VarRef to capture the sockaddr struct of new connection
retCode := 1
sockaddr := winsock.sockaddr(,this.familyName) ; new approach ...
If ((newdesc := DllCall("Ws2_32\accept","UInt",this.desc,"UPtr",sockaddr.ptr,"Int*",sockaddr.size)) = -1) {
this.WsaLastErr("accept"), retCode := 0, this.Close()
return 0
}
newsock := winsock("serving-" newdesc, this.cb, this.familyName, this.protocolName, this.socktypeName, newdesc)
(!block) ? newsock.RegisterEvents() : "" ; enable non-blocking mode (default)
strAddr := newsock.AddrToStr(sockaddr), cSep := InStr(strAddr,":",,,-1)
newsock.addr := RegExReplace(SubStr(strAddr,1,cSep-1),"[\[\]]","") ; record connecting address
newsock.port := SubStr(strAddr,cSep+1) ; record connecting port
winsock.sockets[String(newsock.desc)] := newsock ; catalog new socket
return retcode
}
AddrToStr(sock_addr, protocol_info:=0) {
DllCall("Ws2_32\WSAAddressToString","UPtr",sock_addr.ptr ,"UInt",sock_addr.size
,"UPtr",protocol_info ,"UPtr",0 ,"UInt*",&strSize:=0)
strbuf := Buffer(strSize * (StrLen(0xFFFF)?2:1),0)
If (DllCall("Ws2_32\WSAAddressToString","UPtr",sock_addr.ptr ,"UInt",sock_addr.size
,"UPtr",protocol_info ,"UPtr",strbuf.ptr ,"Int*",strSize) = -1) {
this.WsaLastErr()
return ""
}
return StrGet(strbuf)
}
RegisterEvents(lEvent:=0x3FF) { ; FD_ALL_EVENTS = 0x3FF
this.block := !lEvent ? false : true
If (result:=this._WSAAsyncSelect(this.desc, A_ScriptHwnd, winsock.wm_msg, lEvent) = -1)
throw Error("WSAASyncSelect failed.", -1)
; If !lEvent
; result := this._ioctlsocket(this.desc, 0x8004667E, &r:=0) ; FIONBIO := 0x8004667E (non-blocking mode)
return !result
}
_WSAAsyncSelect(sock_desc, hwnd, msg, lEvent) =>
DllCall("Ws2_32\WSAAsyncSelect", "UInt", sock_desc, "UPtr", hwnd, "UInt", msg, "UInt", lEvent)
Bind(host:=0,port:=0) {
Static AI_PASSIVE:=0x1 ; required flag for calling Bind()
result := this.GetAddrInfo(host,port,AI_PASSIVE) ; addrinfo struct
retCode := 1
If (DllCall("Ws2_32\bind", "UInt", this.desc, "UPtr", result.addr, "UInt", result.addrlen) = -1)
this.WsaLastErr("bind"), retCode := 0, this.Close() ; close socket
DllCall("Ws2_32\FreeAddrInfo", "UPtr", result.ptr) ; free memory of addrinfo chain
return retCode
}
Close() {
result := 1
if (DllCall("Ws2_32\closesocket","Int",this.desc) = -1)
this.WsaLastErr("closesocket"), result := 0
Else
winsock.sockets.Delete(String(this.desc)), this.status := "Closed"
return result
}
Connect(host:=0,port:=0,block:=false) { ; init connect process
(!block) ? (this.RegisterEvents()) : ""
If (this.ConAddrStruct := this.GetAddrInfo(this.host:=host,port)) {
this.ConAddrRoot := this.ConAddrStruct.ptr
; dbg("root: " this.ConAddrRoot " / next: " this.ConAddrStruct.next)
If !block {
result := this.ConnectNext()
} Else {
While (result := this.ConnectNext()) { ; initiate connect process
; dbg("still looping?")
Sleep(10)
}
this.ConnectFinish() ; cleanup
}
}
If (result=-1) && this.WsaLastErr("connect") && (this.err = "WSAEWOULDBLOCK")
result := !result
return !result
}
ConnectFinish() { ; free memory of addrinfo chain
DllCall("Ws2_32\FreeAddrInfo", "UPtr", this.ConAddrRoot)
this.ConAddrRoot := 0, this.ConAddrStruct := ""
}
ConnectNext() { ; ConAddrIndex is initiated at 0. The first call of ConnectNext() sets ConAddrIndex to 1.
this.status := "Connecting"
this.ConAddrIndex++ ; When ConAddrIndex is > 1, the next line prepares the next address to try, if any.
(this.ConAddrIndex>1) ? (this.ConAddrStruct := winsock.addrinfo(this.ConAddrStruct.next)) : "" ; this.ConAddrStruct.next checked in WM_SOCKET
; dbg("ConAddrIndex: " this.ConAddrIndex)
sockaddr := winsock.sockaddr(this.ConAddrStruct.addr,this.ConAddrStruct.addrlen) ; get sockaddr struct
strAddr := this.AddrToStr(sockaddr), cSep := InStr(strAddr,":",,,-1)
this.addr := RegExReplace(SubStr(strAddr,1,cSep-1), "[\[\]]", "") ; record connecting address
this.port := SubStr(strAddr,cSep+1) ; record connecting port
If (r := DllCall("Ws2_32\connect","UInt",this.desc,"UPtr",this.ConAddrStruct.addr,"UInt",this.ConAddrStruct.addrlen) = -1)
this.WsaLastErr("connect")
; dbg("connect result: " r " / err: " this.err)
return r
}
CreateSocket(desc:=-1) { ; make new socket, or take given socket, then call WSAAsyncSelect
result := 1
If ((desc = -1) ; try to open the socket
&& (this.desc := DllCall("Ws2_32\socket","Int",this.family,"Int",this.socktype,"Int",this.protocol)) = -1)
this.WsaLastErr("socket"), result := 0
return result
}
GetAddrInfo(host,port:=0,flags:=0) {
hints := winsock.addrinfo()
hints.family := this.family , hints.protocol := this.protocol
hints.socktype := this.socktype, hints.flags := flags
if (err := DllCall("Ws2_32\GetAddrInfo",(host?"Str":"UPtr"),host
,(port?"Str":"UPtr"),(port?String(port):0)
,"UPtr",hints.ptr
,"UPtr*",&result:=0)) {
this.WsaLastErr("GetAddrInfo")
return winsock.addrinfo(0) ; return NULL ptr
}
return winsock.addrinfo(result)
}
Listen(backlog:=5,block:=false) { ; SOMAXCONN = 5
(!block) ? this.RegisterEvents() : "" ; enable non-blocking mode (default)
retCode := 1
If (DllCall("Ws2_32\listen","UInt",this.desc,"Int",backlog) = -1)
this.WsaLastErr("bind"), retCode := 0, this.Close() ; close socket
return retCode
}
; QueueData(buf) => this.OutQueue.Push(buf) ; ???
Recv(flags:=0) {
If (this._ioctlsocket(this.desc, 0x4004667F, &bytes) = -1) { ; FIONREAD := 0x4004667F
this.WsaLastErr("ioctlsocket")
If (this.err != "WSAEWOULDBLOCK")
return Buffer(0)
}
buf := Buffer(bytes,0)
If (DllCall("Ws2_32\recv","UInt",this.desc,"UPtr",buf.ptr,"Int",buf.size,"Int",flags) = -1) {
this.WsaLastErr("recv")
if (this.err != "WSAEWOULDBLOCK")
return Buffer(0)
}
return buf
}
_ioctlsocket(socket, cmd, &agrp:=0) => DllCall("Ws2_32\ioctlsocket", "UInt", socket, "UInt", cmd, "UInt*", &agrp:=0)
Send(buf,flags:=0) {
If (DllCall("Ws2_32\send","UInt",this.desc,"UPtr",buf.ptr,"UInt",buf.size,"UInt",flags) = -1) {
this.WsaLastErr("send")
return 0
} Else return 1
}
WsaLastErr(LastOp:="") {
If (result := DllCall("Ws2_32\WSAGetLastError"))
this.errnum := result, this.LastOp := LastOp, this.err := winsock.errors.%result%
Else
this.errnum := 0 , this.LastOp := "" , this.err := ""
return result
}
__Delete() => this.Close() ; close socket if open
class addrinfo {
Static __New() {
off := {flags: {off:0, type:"Int"} ,addrlen: {off:16, type:"UPtr"}
,family: {off:4, type:"Int"} ,cannonname:{off:16+(p:=A_PtrSize),type:"UPtr"}
,socktype: {off:8, type:"Int"} ,addr: {off:16+(p*2),type:"UPtr"}
,protocol: {off:12, type:"Int"} ,next: {off:16+(p*3),type:"UPtr"}}
this.Prototype.DefineProp("s",{Value:off})
}
__New(buf := 0) {
this.DefineProp("_struct",{Value:(!buf) ? Buffer(16 + (A_PtrSize*4),0) : {ptr:buf}})
this.DefineProp("Ptr",{Get:(o)=>this._struct.ptr})
}
__Get(name,p) => NumGet(this.ptr, this.s.%name%.off, this.s.%name%.type)
__Set(name,p,value) => NumPut(this.s.%name%.type, value, this.ptr, this.s.%name%.off)
}
class sockaddr { ; family := {Unspec:0, IPV4:2, NetBIOS:17, IPV6:23, IRDA:26, BTH:32}
__New(buf := 0, fam := "IPv4") { ; buf=0 && fam=family_text OR buf=ptr && fam=size
Static _fs := winsock.fam_size, _fo := winsock.fam_addr_off, _fL := winsock.fam_len
, _f := winsock.family, _f2 := winsock.family_2
If !buf && !winsock.family.HasOwnProp(fam)
throw Error("Invalid family for sockaddr creation: " fam, -1)
this.DefineProp("size",{Value:size := (Type(fam)="String")?(_fs.%fam%):fam})
this.DefineProp("_struct",{Value:(!buf) ? Buffer(size,0) : {ptr:buf}})
this.DefineProp("Ptr",{Get:(o)=>this._struct.ptr})
(buf) ? (fam := _f2.%NumGet(buf,0,"UShort")%) : NumPut("UShort",_f.%fam%,this.Ptr) ; init family, or get fam name
; off := {family: {off:0,type:"UShort"},address: {off:_fo.%family% , len:_fL.%family%}
; ,port: {off:2,type:"UShort"},flowinfo:{off:4,type:"UInt"}
; ,scopeid: {off:24,type:"UInt"}}
off := {family: {off:0,type:"UShort"},flowinfo:{off:4 ,type:"UInt"}, address:{off:_fo.%fam% , len:_fL.%fam%}
, port: {off:2,type:"UShort"}, scopeid:{off:24,type:"UInt"}}
this.DefineProp("s",{Value:off})
}
__Get(name,p) => (this.s.%name%.HasOwnProp("len")) ? this.extract(this.ptr + this.s.%name%.off,this.s.%name%.len)
: NumGet(this.ptr,this.s.%name%.off,this.s.%name%.type)
__Set(name,p,value) => (this.s.%name%.HasOwnProp("len")) ? this.insert(value,this.ptr + this.s.%name%.off)
: NumPut(this.s.%name%.type,value,this.ptr,this.s.%name%.off)
}
; class ProtoInfo {
; Static __New() {
; off :=
; }
; __New(buf:=0) {
; Static u := StrLen(Chr(0xFFFF))
; this._struct := (!buf) ? Buffer(u?:,0) : {ptr:buf}
; this.DefineProp("Ptr",{Get:(o)=>this._struct.ptr})
; }
; }
}
; typedef struct _WSAPROTOCOL_INFOA {
; DWORD dwServiceFlags1;
; DWORD dwServiceFlags2;
; DWORD dwServiceFlags3;
; DWORD dwServiceFlags4;
; DWORD dwProviderFlags;
; GUID ProviderId;
; DWORD dwCatalogEntryId;
; WSAPROTOCOLCHAIN ProtocolChain;
; int iVersion;
; int iAddressFamily;
; int iMaxSockAddr;
; int iMinSockAddr;
; int iSocketType;
; int iProtocol;
; int iProtocolMaxOffset;
; int iNetworkByteOrder;
; int iSecurityScheme;
; DWORD dwMessageSize;
; DWORD dwProviderReserved;
; CHAR szProtocol[WSAPROTOCOL_LEN + 1];
; } WSAPROTOCOL_INFOA, *LPWSAPROTOCOL_INFOA;
; ========================================================================
; Old methods
; ========================================================================
; MsgSize() {
; static FIONREAD := 0x4004667F
; if (DllCall("Ws2_32\ioctlsocket", "UInt", this.Socket, "UInt", FIONREAD, "UInt*", &argp:=0) == -1)
; throw Error("Error calling ioctlsocket",, this.GetLastError())
; return argp
; }
; MsgMonitor(wParam, lParam, Msg, hWnd) {
; dbg("msg: " Format("0x{:X}",msg) " / hwnd: " hWnd " / wParam: " wParam " / lParam: " lParam)
; if (Msg != Socket.WM_SOCKET || wParam != this.Socket)
; return
; dbg("it worked? / " Type(this.recvCB) " / ID: " this.SockID)
; If (RecvCB := this.recvCB) { ; data, date, EventType, socket
; if (lParam & Socket.FD_READ) {
; dbg("reading... / ID: " this.SockID)
; RecvCB("", "read", this) ; this.Recv()
; } else if (lParam & Socket.FD_ACCEPT) {
; dbg("accepting... / ID: " this.SockID)
; RecvCB("", "accept", this) ; this.Accept()
; } else if (lParam & Socket.FD_CLOSE) {
; dbg("closing... / ID: " this.SockID)
; this.EventProcUnregister(), this.Disconnect(), RecvCB("", "close", this)
; }
; }
; }
; EventProcRegister(lEvent) {
; this.AsyncSelect(lEvent)
; if !this.Bound {
; this.Bound := ObjBindMethod(this,"MsgMonitor")
; OnMessage Socket.WM_SOCKET, this.Bound ; register event function
; }
; }
; EventProcUnregister() {
; this.AsyncSelect(0)
; if this.Bound {
; OnMessage Socket.WM_SOCKET, this.Bound, 0 ; unregister event function
; this.Bound := False
; }
; }
; AsyncSelect(lEvent) {
; if (r := DllCall("Ws2_32\WSAAsyncSelect"
; , "UInt", this.Socket ; s
; , "Ptr", A_ScriptHwnd ; hWnd
; , "UInt", Socket.WM_SOCKET ; wMsg
; , "UInt", lEvent) == -1) ; lEvent
; throw Error("Error calling WSAAsyncSelect ---> SockID: " this.SockID " / " this.Socket,, this.GetLastError())
; }
; GetLastError() {
; return DllCall("Ws2_32\WSAGetLastError")
; }
; SetBroadcast(Enable) { ; for UDP sockets only -- don't know what this does yet
; static SOL_SOCKET := 0xFFFF, SO_BROADCAST := 0x20
; if (DllCall("Ws2_32\setsockopt"
; , "UInt", this.Socket ; SOCKET s
; , "Int", SOL_SOCKET ; int level
; , "Int", SO_BROADCAST ; int optname
; , "UInt", !!Enable ; *char optval
; , "Int", 4) == -1) ; int optlen
; throw Error("Error calling setsockopt",, this.GetLastError())
; }