-- File: GateFTPServer.mesa - last edit:
-- WIrish 5-Feb-88 12:10:52
-- HGM 25-Jun-85 4:32:14
-- Copyright (C) 1983, 1984, 1985, 1988 by Xerox Corporation. All rights reserved.
DIRECTORY
Ascii USING [CR],
CmFile USING [Handle, TableError],
Event USING [aboutToSwap],
EventTypes USING [aboutToBoot, aboutToBootPhysicalVolume],
Format USING [StringProc],
Heap USING [systemZone],
Process USING [SecondsToTicks],
Profile USING [GetDefaultRegistry],
Put USING [Text],
Runtime USING [GetBcdTime],
STP USING [GetProperty],
STPExtra USING [Action, Denied, ApprovalProc, Server],
Stream USING [Delete, Handle],
String USING [AppendChar, AppendString, AppendNumber, CopyToNewString, Equivalent],
StringLookUp USING [noMatch, TableDesc],
Supervisor USING [
AddDependency, AgentProcedure, CreateSubsystem, RemoveDependency,
SubsystemHandle],
Time USING [Append, AppendCurrent, Unpack],
Token USING [Item, Octal],
Tool USING [Create, MakeSWsProc, MakeMsgSW],
ToolWindow USING [TransitionProcType],
Window USING [Handle],
Indirect USING [Close, GetParmFileName, NextValue, OpenSection],
Password USING [Check, Encrypted, Status, ValidMemberOfGroup],
PupDefs USING [AppendHostName],
PupStream USING [
CreatePupByteStreamListener, DestroyPupListener, PupAddress,
PupPackageDestroy, PupPackageMake, PupListener, RejectThisRequest,
SecondsToTocks];
GateFTPServer: MONITOR
IMPORTS
CmFile, Event, Heap, Process, Profile, Put, Runtime,
STP, STPExtra, Stream, String, Supervisor, Time,
Token, Tool, Indirect, Password, PupDefs, PupStream =
BEGIN
herald: LONG STRING = [100];
myGroup: LONG STRING ← NIL;
pupListener: PupStream.PupListener ← NIL;
parmFileName: LONG STRING ← Indirect.GetParmFileName[];
firstPassword: LONG POINTER TO PasswordBlock ← NIL;
PasswordBlock: TYPE = RECORD [
next: LONG POINTER TO PasswordBlock,
user: LONG STRING,
encrypted: Password.Encrypted];
maxServers: CARDINAL = 2;
servers: CARDINAL ← 0;
scratchFileNumber: CARDINAL ← 0;
tool, msg: Window.Handle ← NIL;
broom: Supervisor.SubsystemHandle = Supervisor.CreateSubsystem[Broom];
useCount: CARDINAL ← 0;
pleaseStop, running: BOOLEAN ← FALSE;
z: UNCOUNTED ZONE = Heap.systemZone;
FTPServerOn: PUBLIC ENTRY PROCEDURE =
BEGIN
IF (useCount ← useCount + 1) = 1 THEN
BEGIN
Supervisor.AddDependency[client: broom, implementor: Event.aboutToSwap];
running ← TRUE;
Starter[];
END;
UpdatePicture[];
END;
CreateHerald: PROCEDURE =
BEGIN
herald: LONG STRING = [100];
String.AppendString[herald, "FTP Server of "L];
Time.Append[herald, Time.Unpack[Runtime.GetBcdTime[]]];
END;
Starter: PROCEDURE =
BEGIN
pleaseStop ← FALSE;
Announce["Starting "L, herald];
FindParameters[];
CreateListener[];
END;
FindParameters: PROCEDURE =
BEGIN
cmFile: CmFile.Handle;
Option: TYPE = MACHINE DEPENDENT{
myGroup(0), password, noMatch(StringLookUp.noMatch)};
DefinedOption: TYPE = Option [myGroup..password];
CheckType: PROCEDURE [h: CmFile.Handle, table: StringLookUp.TableDesc]
RETURNS [index: CARDINAL] = Indirect.NextValue;
MyNextValue: PROCEDURE [
h: CmFile.Handle,
table: LONG DESCRIPTOR FOR ARRAY DefinedOption OF LONG STRING]
RETURNS [index: Option] = LOOPHOLE[CheckType];
optionTable: ARRAY DefinedOption OF LONG STRING ← [
myGroup: "My Group"L,
password: "Password"L];
myGroup ← String.CopyToNewString[parmFileName, z];
FOR i: CARDINAL DECREASING IN [0..myGroup.length) DO
IF myGroup[i] = '. THEN myGroup.length ← i; ENDLOOP;
BEGIN
builtin: ARRAY [0..8) OF WORD = [
172427B, 11553B, 61543B, 113154B, 161500B, 47164B, 173546B, 120250B];
firstPassword ← z.NEW[PasswordBlock];
firstPassword↑ ← [NIL, String.CopyToNewString["Magic"L, z], LOOPHOLE[builtin]];
END;
cmFile ← Indirect.OpenSection["FTPServer"L];
IF cmFile = NIL THEN RETURN; -- Nothing needed, so don't complain.
DO
option: Option;
option ← MyNextValue[cmFile, DESCRIPTOR[optionTable] !
CmFile.TableError =>
BEGIN
IF name[0] # '; THEN Message["Unrecognized parameter: ", name];
RETRY;
END];
SELECT option FROM
noMatch => EXIT;
myGroup =>
BEGIN
z.FREE[@myGroup];
myGroup ← Token.Item[cmFile, FALSE];
Message["My Group for FTP passwords is "L, myGroup];
END;
password =>
BEGIN
user: LONG STRING;
pwd: STRING = [8*8];
e: Password.Encrypted;
p: POINTER ← @e;
temp: LONG POINTER TO PasswordBlock;
user ← Token.Item[cmFile];
FOR i: CARDINAL IN [0..SIZE[Password.Encrypted]) DO
(p + i)↑ ← Token.Octal[cmFile]; ENDLOOP;
FOR i: CARDINAL IN [0..SIZE[Password.Encrypted]) DO
IF i # 0 THEN String.AppendChar[pwd, ' ];
String.AppendNumber[pwd, (p + i)↑, 8];
ENDLOOP;
temp ← z.NEW[PasswordBlock ← [firstPassword, user, e]];
firstPassword ← temp;
Message["FTP's Password for "L, user, " is "L, pwd];
END;
ENDCASE => ERROR;
ENDLOOP;
Indirect.Close[cmFile];
END;
ForgetParameters: PROCEDURE =
BEGIN
UNTIL firstPassword = NIL DO
temp: LONG POINTER TO PasswordBlock ← firstPassword;
firstPassword ← firstPassword.next;
z.FREE[@temp.user];
z.FREE[@temp];
ENDLOOP;
z.FREE[@myGroup];
END;
FTPServerOff: PUBLIC ENTRY PROCEDURE =
BEGIN
IF useCount # 0 AND (useCount ← useCount - 1) = 0 THEN
BEGIN
running ← FALSE;
Stopper[];
Supervisor.RemoveDependency[client: broom, implementor: Event.aboutToSwap];
END;
END;
StopperLocked: ENTRY PROCEDURE = INLINE {Stopper[]};
Stopper: INTERNAL PROCEDURE =
BEGIN
pause: CONDITION ← [timeout: Process.SecondsToTicks[1]];
pleaseStop ← TRUE;
UNTIL servers = 0 DO WAIT pause; ENDLOOP;
DestroyListener[];
ForgetParameters[];
Announce["Killed "L, herald];
END;
UpdatePicture: PROCEDURE = BEGIN END;
CreateListener: PROCEDURE =
BEGIN
IF pupListener # NIL THEN RETURN;
[] ← PupStream.PupPackageMake[];
pupListener ← PupStream.CreatePupByteStreamListener[
local: [0, 3], proc: CreateSTPServer, ticks: PupStream.SecondsToTocks[3*60],
filter: CheckConnectionRequest];
END;
DestroyListener: PROCEDURE =
BEGIN
IF pupListener # NIL THEN
BEGIN
PupStream.DestroyPupListener[pupListener];
PupStream.PupPackageDestroy[];
pupListener ← NIL;
END;
END;
CheckConnectionRequest: ENTRY PROCEDURE [address: PupStream.PupAddress] =
BEGIN ENABLE UNWIND => NULL;
IF pleaseStop THEN
ERROR PupStream.RejectThisRequest["Sorry, we are trying to go away"];
IF servers = maxServers THEN
ERROR PupStream.RejectThisRequest["Sorry, we are full now"];
servers ← servers + 1;
END;
DecrementConnections: ENTRY PROCEDURE =
BEGIN
servers ← servers - 1;
END;
CreateSTPServer: PROCEDURE [byteStream: Stream.Handle, address: PupStream.PupAddress] =
BEGIN -- this guy gets FORKed for every accepted RFC
hostName: STRING = [50];
buffer: STRING = [200];
Write: Format.StringProc =
BEGIN
FOR i: CARDINAL IN [0..s.length) DO
char: CHARACTER ← s[i];
SELECT TRUE FROM
buffer.length = buffer.maxlength =>
BEGIN
Announce[buffer, NIL];
buffer.length ← 0;
String.AppendChar[buffer, char];
END;
char = Ascii.CR =>
BEGIN
Announce[buffer, NIL];
buffer.length ← 0;
END;
ENDCASE => String.AppendChar[buffer, char];
ENDLOOP;
END;
Approval: STPExtra.ApprovalProc =
BEGIN
user: LONG STRING = STP.GetProperty[stp, userName];
password: LONG STRING = STP.GetProperty[stp, userPassword];
IF FALSE THEN -- Barf. Property list has been flused for retrieve and delete
IF user = NIL THEN ERROR STPExtra.Denied["Name missing"L];
SELECT action FROM
retrieve => AnnounceFor["Retrieving "L, name, user, hostName];
store =>
BEGIN
AnnounceFor["Storing "L, name, user, hostName];
InspectCredentials[user, password];
END;
delete =>
BEGIN
AnnounceFor["Deleting "L, name, user, hostName];
InspectCredentials[user, password];
END;
rename =>
BEGIN
AnnounceFor["Renaming "L, name, user, hostName];
InspectCredentials[user, password];
END;
list => AnnounceFor["Listing "L, name, user, hostName];
ENDCASE => ERROR;
END;
PupDefs.AppendHostName[hostName, address];
STPExtra.Server[byteStream, hostName, Write, Approval ! ABORTED => CONTINUE];
Stream.Delete[byteStream];
DecrementConnections[];
END;
InspectCredentials: PROCEDURE [user, password: LONG STRING] =
BEGIN
registry: STRING = [100];
CopyRegistry: PROCEDURE [s: LONG STRING] = BEGIN String.AppendString[registry, s]; END;
Profile.GetDefaultRegistry[CopyRegistry];
IF user = NIL OR password = NIL THEN
ERROR STPExtra.Denied["Name or Password missing"L];
-- check passwords from parameter file
FOR finger: LONG POINTER TO PasswordBlock ← firstPassword, finger.next UNTIL
finger = NIL DO
IF String.Equivalent[finger.user, user] THEN
BEGIN
matched: BOOLEAN ← Password.Check[password, finger.encrypted];
IF matched THEN RETURN
ELSE ERROR STPExtra.Denied["Password rejected by info from parameter file"L];
END;
ENDLOOP;
-- try Grapevine if that fails
IF myGroup = NIL THEN
ERROR STPExtra.Denied["Don't know our Grapevine group"L]
ELSE
BEGIN
luser: LONG STRING ← MaybeAppend[user, registry];
machine: LONG STRING ← MaybeAppend[myGroup, "internet"L];
status: Password.Status;
status ← Password.ValidMemberOfGroup[luser, password, machine];
z.FREE[@machine];
z.FREE[@luser];
SELECT status FROM
yes => NULL;
nil => ERROR STPExtra.Denied["Confusion about NIL"L];
allDown =>
ERROR STPExtra.Denied["All Grapevine servers appear to be down"L];
notFound =>
ERROR STPExtra.Denied["Grapevine doesn't like your name"L];
badPwd =>
ERROR STPExtra.Denied["Grapevine doesn't like your password"L];
group =>
ERROR STPExtra.Denied["Grapevine thinks you are a group"L];
no =>
ERROR STPExtra.Denied["You are not in the appropriate group"L];
notGroup =>
ERROR STPExtra.Denied["Grapevine doesn't recognize this machine's group"L];
error =>
ERROR STPExtra.Denied["Error from GrapevineUser package"L];
ENDCASE => ERROR;
END;
END;
MaybeAppend: PROCEDURE [string, tail: LONG STRING] RETURNS [new: LONG STRING] =
BEGIN
IF tail = NIL THEN RETURN[String.CopyToNewString[string, z]];
FOR i: CARDINAL IN [0..string.length) DO
IF string[i] = '. THEN RETURN[String.CopyToNewString[string, z]]; ENDLOOP;
new ← String.CopyToNewString[string, z, 1 + tail.length];
String.AppendChar[new, '.];
String.AppendString[new, tail];
END;
Announce: PROCEDURE [one, two: LONG STRING] =
BEGIN OPEN String;
text: STRING = [200];
Time.AppendCurrent[text];
AppendString[text, " "L];
AppendString[text, one];
AppendString[text, two];
LogString[text];
END;
AnnounceFor: PROCEDURE [one, two: LONG STRING, who, where: LONG STRING] =
BEGIN OPEN String;
text: STRING = [200];
Time.AppendCurrent[text];
AppendString[text, " "L];
AppendString[text, one];
AppendString[text, two];
AppendString[text, " for "L];
AppendString[text, who];
AppendString[text, " on "L];
AppendString[text, where];
LogString[text];
END;
Message: PROCEDURE [one, two, three, four: LONG STRING ← NIL] =
BEGIN
text: STRING = [100];
String.AppendString[text, one];
IF two # NIL THEN String.AppendString[text, two];
IF three # NIL THEN String.AppendString[text, three];
IF four # NIL THEN String.AppendString[text, four];
LogString[text];
END;
LogString: PROCEDURE [text: LONG STRING] =
BEGIN
String.AppendChar[text, '.];
String.AppendChar[text, Ascii.CR];
Put.Text[NIL, text];
IF msg # NIL THEN Put.Text[msg, text];
END;
MakeSWs: Tool.MakeSWsProc =
BEGIN msg ← Tool.MakeMsgSW[window: window, lines: 5]; END;
ClientTransition: ToolWindow.TransitionProcType =
BEGIN IF new = inactive THEN msg ← NIL; END;
restarting: BOOLEAN ← FALSE;
Restart: ENTRY PROCEDURE = BEGIN Stopper[]; restarting ← FALSE; Starter[]; END;
Broom: Supervisor.AgentProcedure =
BEGIN
SELECT event FROM
EventTypes.aboutToBoot, EventTypes.aboutToBootPhysicalVolume =>
IF running THEN StopperLocked[];
ENDCASE => NULL;
END;
-- Initialization
CreateHerald[];
tool ← Tool.Create[
name: herald, makeSWsProc: MakeSWs, clientTransition: ClientTransition];
FTPServerOn[];
END.