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WebSocket SS.cpn
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WebSocket SS.cpn
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<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE workspaceElements PUBLIC "-//CPN//DTD CPNXML 1.0//EN" "http://cpntools.org/DTD/6/cpn.dtd">
<workspaceElements>
<generator tool="CPN Tools"
version="3.2.2"
format="6"/>
<cpnet>
<globbox>
<block id="ID1412310166">
<id>Standard priorities</id>
<ml id="ID1412310255">val P_HIGH = 100;
<layout>val P_HIGH = 100;</layout>
</ml>
<ml id="ID1412310292">val P_NORMAL = 1000;
<layout>val P_NORMAL = 1000;</layout>
</ml>
<ml id="ID1412310322">val P_LOW = 10000;
<layout>val P_LOW = 10000;</layout>
</ml>
</block>
<block id="ID1">
<id>Standard declarations</id>
<color id="ID85042">
<id>UNIT</id>
<unit/>
<layout>colset UNIT = unit;</layout>
</color>
<color id="ID3">
<id>INT</id>
<int/>
</color>
<color id="ID4">
<id>BOOL</id>
<bool/>
</color>
<color id="ID5">
<id>STRING</id>
<string/>
</color>
<color id="ID1412604261">
<id>STRINGLIST</id>
<list>
<id>STRING</id>
</list>
<layout>colset STRINGLIST = list STRING;</layout>
</color>
<var id="ID1412347868">
<type>
<id>UNIT</id>
</type>
<id>u</id>
<id>u1</id>
<id>u2</id>
<id>u3</id>
<layout>var u, u1, u2, u3: UNIT;</layout>
</var>
<var id="ID1412346888">
<type>
<id>BOOL</id>
</type>
<id>b</id>
<id>b1</id>
<id>b2</id>
<id>b3</id>
<layout>var b, b1, b2, b3: BOOL;</layout>
</var>
<var id="ID1412347465">
<type>
<id>INT</id>
</type>
<id>i</id>
<id>j</id>
<id>k</id>
<layout>var i, j, k: INT;</layout>
</var>
<var id="ID1412346333">
<type>
<id>STRING</id>
</type>
<id>s</id>
<id>s1</id>
<id>s2</id>
<id>s3</id>
<layout>var s, s1, s2, s3: STRING;</layout>
</var>
<var id="ID1412612087">
<type>
<id>STRINGLIST</id>
</type>
<id>ss</id>
<id>ss1</id>
<id>ss2</id>
<layout>var ss, ss1, ss2: STRINGLIST;</layout>
</var>
</block>
<color id="ID1417736058">
<id>BIT</id>
<bool>
<with>
<id>clear</id>
<id>set</id>
</with>
</bool>
<layout>colset BIT= bool with (clear, set);</layout>
</color>
<color id="ID1417689610">
<id>BYTE</id>
<int>
<with>
<ml>0x00</ml>
<ml>0xFF</ml>
</with>
</int>
<layout>colset BYTE = int with 0x00..0xFF;</layout>
</color>
<block id="ID1421456676">
<id>Parameters</id>
<ml id="ID1421470602">val fragSize = 20;
<layout>val fragSize = 20;</layout>
</ml>
</block>
<block id="ID1415544646">
<id>Constants</id>
<ml id="ID1431240147">val origin = "http://www.example.com";
<layout>val origin = "http://www.example.com";</layout>
</ml>
<ml id="ID1413249567">val httpVersion = "HTTP/1.1";
<layout>val httpVersion = "HTTP/1.1";</layout>
</ml>
<ml id="ID1415560287">val nonce = "nonce";
<layout>val nonce = "nonce";</layout>
</ml>
<ml id="ID1416539554">val uuid = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
<layout>val uuid = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";</layout>
</ml>
</block>
<block id="ID1415525155">
<id>Functions</id>
<ml id="ID1415536841">fun B64 str =
"B64("^str^")";
<layout>fun B64 str =
"B64("^str^")";</layout>
</ml>
<ml id="ID1416508324">fun SHA1 str =
"SHA1("^str^")";
<layout>fun SHA1 str =
"SHA1("^str^")";</layout>
</ml>
</block>
<block id="ID1412651705">
<id>URL declarations</id>
<color id="ID1412345812">
<id>URL</id>
<record>
<recordfield>
<id>Protocol</id>
<id>STRING</id>
</recordfield>
<recordfield>
<id>Host</id>
<id>STRING</id>
</recordfield>
<recordfield>
<id>Port</id>
<id>INT</id>
</recordfield>
<recordfield>
<id>Path</id>
<id>STRING</id>
</recordfield>
</record>
<layout>colset URL = record
Protocol: STRING *
Host: STRING *
Port: INT *
Path: STRING;</layout>
</color>
<var id="ID1412827859">
<type>
<id>URL</id>
</type>
<id>url</id>
<layout>var url: URL;</layout>
</var>
<ml id="ID1412366299">fun split2 (s, t, i) =
(* Recursively scan for substring t in string s
starting as position i, split if match *)
let
val ss = String.extract(s, i, NONE)
in
if String.isPrefix t ss then
[substring(s, 0, i),
String.extract(s, i + String.size t, NONE)]
else split2(s, t, i+1)
end
<layout>fun split2 (s, t, i) =
(* Recursively scan for substring t in string s
starting as position i, split if match *)
let
val ss = String.extract(s, i, NONE)
in
if String.isPrefix t ss then
[substring(s, 0, i),
String.extract(s, i + String.size t, NONE)]
else split2(s, t, i+1)
end</layout>
</ml>
<ml id="ID1412365221">fun split (s, t) =
(* Split string s around substring t*)
if String.isPrefix t s then
[String.extract(s, String.size t, NONE)]
else if String.isSubstring t s then
split2 (s, t, 1)
else [s]
<layout>fun split (s, t) =
(* Split string s around substring t*)
if String.isPrefix t s then
[String.extract(s, String.size t, NONE)]
else if String.isSubstring t s then
split2 (s, t, 1)
else [s]</layout>
</ml>
<ml id="ID1412351951">fun parseUrl (s) =
let
val proto'rest = split (s, "://")
val proto'rest =
if length proto'rest = 1
then "ws" :: proto'rest
else proto'rest
val pro = List.hd(proto'rest)
val host'path = split (List.nth(proto'rest, 1), "/")
val pat = if length host'path = 2
then "/" ^ List.nth(host'path, 1)
else "/"
val host'port = split (List.hd(host'path), ":")
val hos = List.hd(host'port)
val port'default = case pro of
"wss" => 443
| _ => 80
val por = if length host'port = 1
then port'default
else let
val port'str = List.nth(host'port, 1)
val port'int'opt = Int.fromString port'str
in
Option.getOpt(port'int'opt, port'default)
end
in
{Protocol=pro,
Host=hos,
Port=por,
Path=pat}
end;
<layout>fun parseUrl (s) =
let
val proto'rest = split (s, "://")
val proto'rest =
if length proto'rest = 1
then "ws" :: proto'rest
else proto'rest
val pro = List.hd(proto'rest)
val host'path = split (List.nth(proto'rest, 1), "/")
val pat = if length host'path = 2
then "/" ^ List.nth(host'path, 1)
else "/"
val host'port = split (List.hd(host'path), ":")
val hos = List.hd(host'port)
val port'default = case pro of
"wss" => 443
| _ => 80
val por = if length host'port = 1
then port'default
else let
val port'str = List.nth(host'port, 1)
val port'int'opt = Int.fromString port'str
in
Option.getOpt(port'int'opt, port'default)
end
in
{Protocol=pro,
Host=hos,
Port=por,
Path=pat}
end;</layout>
</ml>
</block>
<block id="ID1418275477">
<id>Interface declarations</id>
<color id="ID1414429371">
<id>OPERATION</id>
<enum>
<id>TEXT</id>
<id>BINARY</id>
<id>PING</id>
<id>PONG</id>
<id>CLOSE</id>
</enum>
<layout>colset OPERATION = with
TEXT | BINARY |
PING | PONG | CLOSE;</layout>
</color>
<color id="ID1412718173">
<id>MESSAGE</id>
<record>
<recordfield>
<id>Op</id>
<id>OPERATION</id>
</recordfield>
<recordfield>
<id>Message</id>
<id>STRING</id>
</recordfield>
</record>
<layout>colset MESSAGE = record
Op: OPERATION *
Message: STRING;</layout>
</color>
<color id="ID1416942917">
<id>MESSAGES</id>
<list>
<id>MESSAGE</id>
</list>
<layout>colset MESSAGES = list MESSAGE;</layout>
</color>
<var id="ID1414597729">
<type>
<id>MESSAGE</id>
</type>
<id>msg</id>
<layout>var msg: MESSAGE;</layout>
</var>
<var id="ID1416952324">
<type>
<id>MESSAGES</id>
</type>
<id>msgs</id>
<id>msgs2</id>
<layout>var msgs, msgs2: MESSAGES;</layout>
</var>
<ml id="ID1423281020">fun isData (msg:MESSAGE) =
(#Op msg = TEXT) orelse
(#Op msg = BINARY);
<layout>fun isData (msg:MESSAGE) =
(#Op msg = TEXT) orelse
(#Op msg = BINARY);</layout>
</ml>
<color id="ID1420664468">
<id>CONN_STATUS</id>
<union>
<unionfield>
<id>CONN_OPEN</id>
</unionfield>
<unionfield>
<id>CONN_CLOSING</id>
</unionfield>
<unionfield>
<id>CONN_CLOSED</id>
</unionfield>
</union>
<layout>colset CONN_STATUS = union
CONN_OPEN +
CONN_CLOSING +
CONN_CLOSED;</layout>
</color>
<block id="ID1430235555">
<id>Client-side</id>
<color id="ID1415723367">
<id>CONN_RESULT</id>
<bool>
<with>
<id>fail</id>
<id>success</id>
</with>
</bool>
<layout>colset CONN_RESULT= bool with
(fail, success);</layout>
</color>
<color id="ID1418966764">
<id>CLIENT_EVENT</id>
<union>
<unionfield>
<id>CliGetMsg</id>
<type>
<id>MESSAGE</id>
</type>
</unionfield>
<unionfield>
<id>ConnResult</id>
<type>
<id>CONN_RESULT</id>
</type>
</unionfield>
</union>
<layout>colset CLIENT_EVENT = union
CliGetMsg:MESSAGE +
ConnResult:CONN_RESULT;</layout>
</color>
<color id="ID1428308302">
<id>CLIENT_EVENTS</id>
<list>
<id>CLIENT_EVENT</id>
</list>
<layout>colset CLIENT_EVENTS = list CLIENT_EVENT;</layout>
</color>
<var id="ID1428326462">
<type>
<id>CLIENT_EVENTS</id>
</type>
<id>cEvents</id>
<layout>var cEvents: CLIENT_EVENTS;</layout>
</var>
<color id="ID1428877257">
<id>CLIENT_CALL</id>
<union>
<unionfield>
<id>Connect</id>
<type>
<id>URL</id>
</type>
</unionfield>
<unionfield>
<id>CliSendMsg</id>
<type>
<id>MESSAGE</id>
</type>
</unionfield>
</union>
<layout>colset CLIENT_CALL = union
Connect:URL +
CliSendMsg:MESSAGE;</layout>
</color>
<color id="ID1428886244">
<id>CLIENT_CALLS</id>
<list>
<id>CLIENT_CALL</id>
</list>
<layout>colset CLIENT_CALLS
= list CLIENT_CALL;</layout>
</color>
<var id="ID1428888084">
<type>
<id>CLIENT_CALLS</id>
</type>
<id>cCalls</id>
<layout>var cCalls: CLIENT_CALLS;</layout>
</var>
</block>
<block id="ID1430242857">
<id>Server-side</id>
<color id="ID1430256771">
<id>SERVER_EVENT</id>
<union>
<unionfield>
<id>SerGetMsg</id>
<type>
<id>MESSAGE</id>
</type>
</unionfield>
<unionfield>
<id>ConnRequest</id>
<type>
<id>UNIT</id>
</type>
</unionfield>
</union>
<layout>colset SERVER_EVENT = union
SerGetMsg:MESSAGE +
ConnRequest:UNIT;</layout>
</color>
<color id="ID1430263391">
<id>SERVER_EVENTS</id>
<list>
<id>SERVER_EVENT</id>
</list>
<layout>colset SERVER_EVENTS =
list SERVER_EVENT;</layout>
</color>
<var id="ID1430281549">
<type>
<id>SERVER_EVENTS</id>
</type>
<id>sEvents</id>
<layout>var sEvents: SERVER_EVENTS;</layout>
</var>
<color id="ID1428028302">
<id>CONN_REPLY</id>
<bool>
<with>
<id>reject</id>
<id>accept</id>
</with>
</bool>
<layout>colset CONN_REPLY = bool with
(reject, accept);</layout>
</color>
<var id="ID1428038536">
<type>
<id>CONN_REPLY</id>
</type>
<id>conn_reply</id>
<layout>var conn_reply: CONN_REPLY;</layout>
</var>
<color id="ID1428017863">
<id>SERVER_CALL</id>
<union>
<unionfield>
<id>SerSendMsg</id>
<type>
<id>MESSAGE</id>
</type>
</unionfield>
<unionfield>
<id>ConnReply</id>
<type>
<id>CONN_REPLY</id>
</type>
</unionfield>
</union>
<layout>colset SERVER_CALL = union
SerSendMsg:MESSAGE +
ConnReply:CONN_REPLY;</layout>
</color>
<color id="ID1428310405">
<id>SERVER_CALLS</id>
<list>
<id>SERVER_CALL</id>
</list>
<layout>colset SERVER_CALLS
= list SERVER_CALL;</layout>
</color>
<var id="ID1428431863">
<type>
<id>SERVER_CALLS</id>
</type>
<id>sCalls</id>
<layout>var sCalls: SERVER_CALLS;</layout>
</var>
</block>
</block>
<block id="ID1413015241">
<id>WebSocket frame declarations</id>
<color id="ID1417705065">
<id>MASK</id>
<list>
<with>
<ml>4</ml>
<ml>4</ml>
</with>
<id>BYTE</id>
</list>
<layout>colset MASK = list BYTE with 4..4;</layout>
</color>
<color id="ID1417975474">
<id>MASKING</id>
<union>
<unionfield>
<id>Nomask</id>
</unionfield>
<unionfield>
<id>Mask</id>
<type>
<id>MASK</id>
</type>
</unionfield>
</union>
<layout>colset MASKING = union
Nomask +
Mask:MASK;</layout>
</color>
<ml id="ID1420933783">fun randMask() = Mask([
0,0,0,0
(*
BYTE.ran(),
BYTE.ran(),
BYTE.ran(),
BYTE.ran()
*)
]);
<layout>fun randMask() = Mask([
0,0,0,0
(*
BYTE.ran(),
BYTE.ran(),
BYTE.ran(),
BYTE.ran()
*)
]);</layout>
</ml>
<ml id="ID1418650267">val opContinuation = 0x0;
val opText = 0x1;
val opBinary = 0x2
val opConnectionClose = 0x8;
val opPing = 0x9;
val opPong = 0xA;
<layout>val opContinuation = 0x0;
val opText = 0x1;
val opBinary = 0x2
val opConnectionClose = 0x8;
val opPing = 0x9;
val opPong = 0xA;</layout>
</ml>
<color id="ID1413023483">
<id>WSFRAME</id>
<record>
<recordfield>
<id>Fin</id>
<id>BIT</id>
</recordfield>
<recordfield>
<id>Rsv1</id>
<id>BIT</id>
</recordfield>
<recordfield>
<id>Rsv2</id>
<id>BIT</id>
</recordfield>
<recordfield>
<id>Rsv3</id>
<id>BIT</id>
</recordfield>
<recordfield>
<id>Opcode</id>
<id>INT</id>
</recordfield>
<recordfield>
<id>Masked</id>
<id>BIT</id>
</recordfield>
<recordfield>
<id>Payload_length</id>
<id>INT</id>
</recordfield>
<recordfield>
<id>Masking_key</id>
<id>MASKING</id>
</recordfield>
<recordfield>
<id>Payload</id>
<id>STRING</id>
</recordfield>
</record>
<layout>colset WSFRAME = record
Fin: BIT *
Rsv1: BIT *
Rsv2: BIT *
Rsv3: BIT *
Opcode: INT *
Masked: BIT *
Payload_length: INT *
Masking_key: MASKING *
Payload: STRING;</layout>
</color>
<color id="ID1424508837">
<id>WSFRAMES</id>
<list>
<id>WSFRAME</id>
</list>
<layout>colset WSFRAMES = list WSFRAME;</layout>
</color>
<var id="ID1417863155">
<type>
<id>WSFRAME</id>
</type>
<id>wsframe</id>
<layout>var wsframe: WSFRAME;</layout>
</var>
<var id="ID1424497188">
<type>
<id>WSFRAMES</id>
</type>
<id>wsframes</id>
<id>wsframes2</id>
<layout>var wsframes, wsframes2: WSFRAMES;</layout>
</var>
</block>
<block id="ID1415671438">
<id>HTTP</id>
<color id="ID1413309696">
<id>HEADER</id>
<record>
<recordfield>
<id>Key</id>
<id>STRING</id>
</recordfield>
<recordfield>
<id>Value</id>
<id>STRING</id>
</recordfield>
</record>
<layout>colset HEADER = record
Key: STRING *
Value: STRING;</layout>
</color>
<color id="ID1413313357">
<id>HEADERS</id>
<list>
<id>HEADER</id>
</list>
<layout>colset HEADERS = list HEADER;</layout>
</color>
<ml id="ID1416597873">fun getHeader (_, []) = ""
| getHeader (key, (h:HEADER)::hs) =
if key = #Key h
then #Value h
else getHeader (key, hs);
<layout>fun getHeader (_, []) = ""
| getHeader (key, (h:HEADER)::hs) =
if key = #Key h
then #Value h
else getHeader (key, hs);</layout>
</ml>
<block id="ID1412941143">
<id>HTTP request declarations</id>
<color id="ID1413229090">
<id>HTTP_VERB</id>
<enum>
<id>GET</id>
<id>POST</id>
<id>PUT</id>
<id>DELETE</id>
<id>HEAD</id>
</enum>
<layout>colset HTTP_VERB = with
GET | POST | PUT | DELETE |
HEAD;</layout>
</color>
<color id="ID1413225712">
<id>REQUEST_LINE</id>
<record>
<recordfield>
<id>Verb</id>
<id>HTTP_VERB</id>
</recordfield>
<recordfield>
<id>Path</id>
<id>STRING</id>
</recordfield>
<recordfield>
<id>Version</id>
<id>STRING</id>
</recordfield>
</record>
<layout>colset REQUEST_LINE = record
Verb: HTTP_VERB *
Path: STRING *
Version: STRING;</layout>
</color>
<color id="ID1412944834">
<id>HTTPREQ</id>
<record>
<recordfield>
<id>RequestLine</id>
<id>REQUEST_LINE</id>
</recordfield>
<recordfield>
<id>Headers</id>
<id>HEADERS</id>
</recordfield>
</record>
<layout>colset HTTPREQ = record
RequestLine: REQUEST_LINE *
Headers: HEADERS;</layout>
</color>
<var id="ID1417752500">
<type>
<id>HTTPREQ</id>
</type>
<id>httpreq</id>
<layout>var httpreq: HTTPREQ;</layout>
</var>
<ml id="ID1413296999">fun httpReqFromUrl (url:URL) =
{
RequestLine={
Verb=GET,
Path=(#Path url),
Version=httpVersion
},
Headers=[
{Key="Host", Value=(#Host url)},
{Key="Upgrade", Value="websocket"},
{Key="Connection", Value="Upgrade"},
{Key="Sec-WebSocket-Key", Value=(B64 nonce)},
{Key="Sec-WebSocket-Version", Value="13"},
{Key="Origin", Value=origin}
]
};
<layout>fun httpReqFromUrl (url:URL) =
{
RequestLine={
Verb=GET,
Path=(#Path url),
Version=httpVersion
},
Headers=[
{Key="Host", Value=(#Host url)},
{Key="Upgrade", Value="websocket"},
{Key="Connection", Value="Upgrade"},
{Key="Sec-WebSocket-Key", Value=(B64 nonce)},
{Key="Sec-WebSocket-Version", Value="13"},
{Key="Origin", Value=origin}
]
};</layout>
</ml>
<ml id="ID1431203207">fun isRequestValid(req:HTTPREQ) = let
val rline = #RequestLine req
val headers = #Headers req
in
#Verb rline = GET andalso
getHeader("Upgrade", headers)
= "websocket" andalso
getHeader("Connection", headers)
= "Upgrade" andalso
getHeader("Origin", headers)
= origin
end
<layout>fun isRequestValid(req:HTTPREQ) = let
val rline = #RequestLine req
val headers = #Headers req
in
#Verb rline = GET andalso
getHeader("Upgrade", headers)
= "websocket" andalso
getHeader("Connection", headers)
= "Upgrade" andalso
getHeader("Origin", headers)
= origin
end</layout>
</ml>
</block>
<block id="ID1415639717">
<id>HTTP response declarations</id>
<color id="ID1415663493">
<id>RESPONSE_LINE</id>
<record>
<recordfield>
<id>Version</id>
<id>STRING</id>
</recordfield>
<recordfield>
<id>Status</id>
<id>INT</id>
</recordfield>
<recordfield>
<id>Message</id>
<id>STRING</id>
</recordfield>
</record>
<layout>colset RESPONSE_LINE = record
Version: STRING *
Status: INT *
Message: STRING;</layout>
</color>
<color id="ID1415655550">
<id>HTTPRES</id>
<record>
<recordfield>
<id>ResponseLine</id>
<id>RESPONSE_LINE</id>
</recordfield>
<recordfield>
<id>Headers</id>
<id>HEADERS</id>
</recordfield>
</record>
<layout>colset HTTPRES = record
ResponseLine: RESPONSE_LINE *
Headers: HEADERS;</layout>
</color>
<var id="ID1417782108">
<type>
<id>HTTPRES</id>
</type>
<id>httpres</id>
<layout>var httpres: HTTPRES;</layout>
</var>
<ml id="ID1416526151">fun generateAccept str =
B64(SHA1(str^uuid));
<layout>fun generateAccept str =
B64(SHA1(str^uuid));</layout>
</ml>
<ml id="ID1416013432">fun isResponseValid (res:HTTPRES, req:HTTPREQ) = let
val rline = #ResponseLine res
val headers = #Headers res
val accepttoken = generateAccept(
getHeader("Sec-WebSocket-Key",
(#Headers req)))
in
#Status rline = 101 andalso
getHeader("Upgrade", headers)
= "websocket" andalso
getHeader("Connection", headers)
= "Upgrade" andalso
getHeader("Sec-WebSocket-Accept",headers)
= accepttoken
end
<layout>fun isResponseValid (res:HTTPRES, req:HTTPREQ) = let
val rline = #ResponseLine res
val headers = #Headers res
val accepttoken = generateAccept(
getHeader("Sec-WebSocket-Key",
(#Headers req)))
in
#Status rline = 101 andalso
getHeader("Upgrade", headers)
= "websocket" andalso
getHeader("Connection", headers)
= "Upgrade" andalso
getHeader("Sec-WebSocket-Accept",headers)
= accepttoken
end</layout>
</ml>
</block>
</block>
<ml id="ID1419619584">fun opHex2Sym(hex) = case hex of
0x1 => TEXT
| 0x2 => BINARY
| 0x8 => CLOSE
| 0x9 => PING
| 0xA => PONG;
<layout>fun opHex2Sym(hex) = case hex of
0x1 => TEXT
| 0x2 => BINARY
| 0x8 => CLOSE
| 0x9 => PING
| 0xA => PONG;</layout>
</ml>
<ml id="ID1421364557">fun opSym2Hex(sym) = case sym of
TEXT => opText
| BINARY => opBinary
| CLOSE=> opConnectionClose
| PING => opPing
| PONG => opPong;
<layout>fun opSym2Hex(sym) = case sym of
TEXT => opText
| BINARY => opBinary
| CLOSE=> opConnectionClose
| PING => opPing
| PONG => opPong;</layout>
</ml>
<block id="ID1428073498">
<id>More functions</id>
<ml id="ID1427803702">fun mask (ws:WSFRAME) = let
val ws1 = WSFRAME.set_Masked ws set
val ws2 = WSFRAME.set_Masking_key ws1 (randMask())
in
ws2
end;
<layout>fun mask (ws:WSFRAME) = let
val ws1 = WSFRAME.set_Masked ws set
val ws2 = WSFRAME.set_Masking_key ws1 (randMask())
in
ws2
end;</layout>
</ml>
<ml id="ID1428015533">fun unmask (ws:WSFRAME) = let
val ws1 = WSFRAME.set_Masked ws clear
val ws2 = WSFRAME.set_Masking_key ws1 Nomask
in
ws2
end;
<layout>fun unmask (ws:WSFRAME) = let
val ws1 = WSFRAME.set_Masked ws clear
val ws2 = WSFRAME.set_Masking_key ws1 Nomask
in
ws2
end;</layout>
</ml>
<ml id="ID1424522774">fun wrap (opc,payload,fin) = {
Fin=fin,
Rsv1=clear,
Rsv2=clear,
Rsv3=clear,
Opcode=opc,
Masked=clear,
Payload_length=(String.size payload),
Masking_key= Nomask,
Payload=payload
}
<layout>fun wrap (opc,payload,fin) = {
Fin=fin,
Rsv1=clear,
Rsv2=clear,
Rsv3=clear,
Opcode=opc,
Masked=clear,
Payload_length=(String.size payload),
Masking_key= Nomask,
Payload=payload
}</layout>
</ml>
<ml id="ID1424606596">fun wrapmsg (msg:MESSAGE,fin) =
wrap(opSym2Hex(#Op msg),
(#Message msg), fin);