Difference between revisions of "LSL Protocol/Restrained Living Relay/Other Implementations/Maike Short's Relay"

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(fixed two faked avatar chat problems)
(This wiki account was created on request by Soft Linden. I hope it is okay to do some cleanup. I won't login to the grid as I am a persona non grata there. Bye, bye Maike Short.)
 
(18 intermediate revisions by 6 users not shown)
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{{Restrained Life Relay Specs TOC}}
{{Restrained Life Relay Specs TOC}}


You can get a free relay object at the MSM Restraints shop in "Stonehaven".
__NOTOC__


== Changes ==


=== 1.030.a ===
* [https://wiki.secondlife.com/w/index.php?title=LSL_Protocol%2FRestrained_Life_Relay%2FOther_Implementations%2FMaike_Short%27s_Relay&diff=190172&oldid=181383 Diff]
* Fixed the compatibility code for world objects that send @clear instead of !release broken by the security fix in 1.020.b


=== 1.030 ===
== Introduction ==
* [https://wiki.secondlife.com/w/index.php?title=LSL_Protocol%2FRestrained_Life_Relay%2FOther_Implementations%2FMaike_Short%27s_Relay&diff=181353&oldid=95277 Diff]
* added "Temp Mute" in the ask dialog which will mute the object until the next time you login (in the extended controller script)
* tell world objects if an active session is canceled by the relay.


Note: It is likely this relay implementation and this present page won't be updated anymore, as Maike Short's accounts have been banned (for some reasons you can easily find out and are not the topic here anyway). The code has been evolved by other people, and many in-world relays have been using it for months now: the relay developing community is more alive than ever. And there are new relays out there developed by smart people from scratch. Thank you Maike, for having made all of this possible!


=== 1.020.c ===
* [https://wiki.secondlife.com/w/index.php?title=LSL_Protocol%2FRestrained_Life_Relay%2FOther_Implementations%2FMaike_Short%27s_Relay&diff=95274&oldid=91741 Diff]
* Display position and distance in permission dialog
=== 1.020.b ===
* [https://wiki.secondlife.com/w/index.php?title=LSL_Protocol%2FRestrained_Life_Relay%2FOther_Implementations%2FMaike_Short%27s_Relay&diff=91723&oldid=89853 Diff]
* This is based on 1.015 and has all the fixed made there missing in Marine's 1.020 which is based on a very early version of 1.014
* Filter automatic RLV replies on public chat channel 0 so that people cannot be tricked to say some foreign text out loud
* Added "this-is-a-script-generated-message-beyond-the-control-of-the-agent/" at the beginning of @getstatus-replies on all channel
* '''Note''': Relays which do not add any restriction on their own (like @detach=n) may be abused using @gestatus to trigger dialog responses, gag talk or other scripts like "to buy as gift, say the name of the receiver on channel /''x''". Any version of the reference implementation smaller than (not including) 1.015 (but including 1.020 which is based on 1.014) are affected by this.
=== 1.015 ===
* see [[LSL Protocol/Restrained Life Relay/Change_History#1.014_to_1.015.a|Changes to the reference implemenation 1.014 to 1.015.a]]


== Code ==
== Code ==


<lsl>
<div style="border: 3px solid red; padding: 1em; background-color:#FFA">
//~ RestrainedLife Viewer Relay Script example code
'''Note: The code on this page was highly outdated and incompatible with the current version of the second life server.'''
//~ By Marine Kelley, Maike Short, Felis Darwin
//~ Thanks to Chorazin Allen, Azoth Amat, Gregor Mougin, Nano Siemens,
//~ Cerdita Piek, Satomi Ahn, Marissa Mistwallow


//~ This code is provided AS-IS, OPEN-SOURCE and holds NO WARRANTY of accuracy,
The assumptions that linked messages are a lot faster than said messages is not true anymore. It is not worth to fix the code because there are other free and open source implementations are out there that are way better by now. --Maike Short
//~ completeness or performance. It may only be distributed in its full source code,
</div>
//~ this header and disclaimer and is not to be sold.


integer DEBUG = FALSE;


// make cheating (adding exceptions) a bit more difficult by not allowing
// attachment to control the viewer as they are not subjected to land building
// restrictions
integer ALLOW_CONTROL_BY_ATTACHMENTS = FALSE;


== Changes ==


// list of refused commands. Use [] to allow everything or
=== 1.040.e ===
// ["@detach", "@remoutfit"] to prevent striping for example
list refusedForceCommands = ["@tpto"];


// ---------------------------------------------------
* workaround for a security issue causing the permission request dialog to be skipped or displayed twice because of a multi threading vulnerability. This issue did not occur in old versions of the Second Life Server software because processing of listen events used to be very slow compared to linked messages.
//                     Constants
* [http://wiki.secondlife.com/w/index.php?title=LSL_Protocol%2FRestrained_Life_Relay%2FOther_Implementations%2FMaike_Short's_Relay%2FRelay_Manager&diff=422682&oldid=341282 my change]
// ---------------------------------------------------


integer RLVRS_PROTOCOL_VERSION = 1030; // version of the protocol, stated on the specification page
=== 1.040.d ===
string RLVRS_IMPL_VERSION = "Based on Maike's Implemenation 1.030.b"; // version of the implementation for debugging
* added a filter option to ignore auto granting of permission. If you are sitting while under @acceptpermission a griefer who is not involved at all can get your animation permission while being several hundred meters away


string PREFIX_RL_COMMAND = "@";
=== 1.040.c ===
string PREFIX_METACOMMAND = "!";
* fixed a !handover permission bug


integer RLVRS_CHANNEL = -1812221819;  // RLVRS in numbers
=== 1.040.b ===
integer DIALOG_CHANNEL = -1812220409; // RLVDI in numbers
* added additional options to the filter (im, vision, windlight, avatar sex)
integer STATUS_LINK_CHANNEL = -1373421300;
* included permissionless tp in tp filter
integer RLV_LINK_CHANNEL = -1373421301;
* included new rlv-commands in strip filter
integer CMD_LINK_CHANNEL = -1373421302;
* clean up windlight settings on release if they have been messed with (does not reset daytime on every released, just when it is required)
integer DIALOG_LINK_CHANNEL = -1373421303;
* some code cleanup
integer ASK_LINK_CHANNEL = -1373421304;


integer MAX_OBJECT_DISTANCE = 100;    // 100m is llShout distance
=== 1.040.a ===
integer MAX_TIME_AUTOACCEPT_AFTER_FORCESIT = 60; // seconds
* added support for multiple world objects
* show world map with tp destination if force-tp is disabled


integer PERMISSION_DIALOG_TIMEOUT = 30;
=== 1.040 ===
integer LOGIN_DELAY_WAIT_FOR_PONG = 10;
* added support for !who which allows world objects to tell who controls them
integer LOGIN_DELAY_WAIT_FOR_FORCE_SIT = 60;
* added support for !handover to support inter-sim kidnappers leading directly into a trap and processing facilities that hand over the victim from one step to the next
* added support for [[LSL_Protocol/Restrained_Life_Relay/Other_Implementations/The_Think_Kink_PBA#The_GPU|!vision script]] from the Think Kink PBA by Ilana Debevec and Chloe1982 Constantine)


integer MODE_OFF = 0;
integer MODE_ASK = 1;
integer MODE_AUTO = 2;


list MODE_DESCRIPTIONS = ["RLV Relay is OFF", "RLV Relay is ON (permission needed)", "RLV Relay is ON (auto-accept)"];


string RVL_COMMAND_START = "@this-is-a-script-generated-message-beyond-the-control-of-the-agent=n,detach=n";
=== 1.030.c ===
string RVL_COMMAND_END = "@detach=y";
* [https://wiki.secondlife.com/w/index.php?title=LSL_Protocol%2FRestrained_Life_Relay%2FOther_Implementations%2FMaike_Short%27s_Relay&diff=262273&oldid=255372 Diff]
* fixed group check on parcels not set to a group (which matched objects set to (none), too (reported by Kitty Barnett)
* fixed <0, 0, 0> pseudo object position in distance check (reported by Kitty Barnett).


// ---------------------------------------------------
=== 1.030.b ===
//                     Variables
* [https://wiki.secondlife.com/w/index.php?title=LSL_Protocol%2FRestrained_Life_Relay%2FOther_Implementations%2FMaike_Short%27s_Relay&diff=255362&oldid=253182 Diff]
// ---------------------------------------------------
* fixed two faked avatar chat problems


integer mode;
=== 1.030.a ===
* [https://wiki.secondlife.com/w/index.php?title=LSL_Protocol%2FRestrained_Life_Relay%2FOther_Implementations%2FMaike_Short%27s_Relay&diff=190172&oldid=181383 Diff]
* Fixed the compatibility code for world objects that send @clear instead of !release broken by the security fix in 1.020.b


list restrictions; // restrictions currently applied (without the "=n" part)
=== 1.030 ===
key source;        // UUID of the object I'm commanded by, always equal to NULL_KEY if restrictions is empty, always set if not
* [https://wiki.secondlife.com/w/index.php?title=LSL_Protocol%2FRestrained_Life_Relay%2FOther_Implementations%2FMaike_Short%27s_Relay&diff=181353&oldid=95277 Diff]
* added "Temp Mute" in the ask dialog which will mute the object until the next time you login (in the extended controller script)
* tell world objects if an active session is canceled by the relay.


string pendingName; // name of initiator of pending request (first request of a session in mode 1)
key pendingId;      // UUID of initiator of pending request (first request of a session in mode 1)
string pendingMessage; // message of pending request
integer pendingTime;


// used on login
integer timerTickCounter; // count the number of time events on login (forceSit has to be delayed a bit)
integer loginWaitingForPong;
integer loginPendingForceSit;


key    lastForceSitDestination;
=== 1.020.c ===
integer lastForceSitTime;
* [https://wiki.secondlife.com/w/index.php?title=LSL_Protocol%2FRestrained_Life_Relay%2FOther_Implementations%2FMaike_Short%27s_Relay&diff=95274&oldid=91741 Diff]
* Display position and distance in permission dialog


integer isNotEmbedded = TRUE;
=== 1.020.b ===
* [https://wiki.secondlife.com/w/index.php?title=LSL_Protocol%2FRestrained_Life_Relay%2FOther_Implementations%2FMaike_Short%27s_Relay&diff=91723&oldid=89853 Diff]
* This is based on 1.015 and has all the fixed made there missing in Marine's 1.020 which is based on a very early version of 1.014
* Filter automatic RLV replies on public chat channel 0 so that people cannot be tricked to say some foreign text out loud
* Added "this-is-a-script-generated-message-beyond-the-control-of-the-agent/" at the beginning of @getstatus-replies on all channel
* '''Note''': Relays which do not add any restriction on their own (like @detach=n) may be abused using @gestatus to trigger dialog responses, gag talk or other scripts like "to buy as gift, say the name of the receiver on channel /''x''". Any version of the reference implementation smaller than (not including) 1.015 (but including 1.020 which is based on 1.014) are affected by this.


// ---------------------------------------------------
=== 1.015 ===
//              Helper functions
// ---------------------------------------------------


 
* see [[LSL Protocol/Restrained Life Relay/Change_History#1.014_to_1.015.a|Changes to the reference implemenation 1.014 to 1.015.a]]
debug(string x)
{
    if (DEBUG)
    {
        llOwnerSay("DEBUG: " + x);
    }
}
 
// checks whether this object is an attachment of an avatar
integer isAttachment(key id)
{
    vector objpos1 = llList2Vector(llGetObjectDetails(id, [OBJECT_POS]), 0);
    vector ownerpos = llList2Vector(llGetObjectDetails(llGetOwnerKey(id), [OBJECT_POS]), 0);
    vector objpos2 = llList2Vector(llGetObjectDetails(id, [OBJECT_POS]), 0);
    return (llVecMag(objpos1 - ownerpos) <= llVecMag(objpos1 - objpos2));
}
 
 
// ---------------------------------------------------
//              Low Level Communication
// ---------------------------------------------------
 
 
// acknowledge or reject
ack(string cmd_id, key id, string cmd, string ack)
{
    llShout(RLVRS_CHANNEL, cmd_id + "," + (string)id + "," + cmd + "," + ack);
}
 
// cmd begins with a '@'
sendRLCmd(string cmd)
{
    if (cmd != "")
    {
        if (isNotEmbedded)
        {
            llOwnerSay(cmd);
        }
        llMessageLinked(LINK_SET, RLV_LINK_CHANNEL, cmd, source);
    }
}
 
 
// check that this command is for us and not someone else
integer verifyWeAreTarget(string message)
{
    list tokens = llParseString2List(message, [","], []);
    if (llGetListLength(tokens) != 3) // this is not a normal command
    {
        return FALSE;
    }
 
    return (llList2String(tokens, 1) == llGetOwner()); // talking to me ?
}
 
// checks that the type of object (world object, attachment) is allowed
integer verifySourceType(key id)
{
    if (ALLOW_CONTROL_BY_ATTACHMENTS)
    {
        return TRUE;
    }
 
    return !isAttachment(id);
}
 
// ---------------------------------------------------
//              Permission Handling
// ---------------------------------------------------
 
 
// are we already under command by this object?
integer isObjectKnow(key id)
{
    // are we already under command by this object?
    if (source == id)
    {
        return TRUE;
    }
 
    // are we not under command by any object but were we forced to sit on this object recently?
    if ((source == NULL_KEY) && (id == lastForceSitDestination))
    {
        debug("on last force sit target");
        if (lastForceSitTime + MAX_TIME_AUTOACCEPT_AFTER_FORCESIT > llGetUnixTime())
        {
            debug("and recent enough to auto accept");
            return TRUE;
        }
    }
 
    return FALSE;
}
 
 
// check whether the object is in llSay distance.
// The specification requires llSay instead of llShout or llRegionSay
// to be used to limit the range. But this has to be checked here again
// because the objects are not trustworthy.
integer isObjectNear(key id)
{
    vector myPosition = llGetRootPosition();
    list temp = llGetObjectDetails(id, ([OBJECT_POS]));
    vector objPostition = llList2Vector(temp,0);
    float distance = llVecDist(objPostition, myPosition);
    return distance <= MAX_OBJECT_DISTANCE;
}
 
// do a basic check on the identity of the object trying to issue a command
integer isObjectIdentityTrustworthy(key id)
{
    key parcel_owner=llList2Key (llGetParcelDetails (llGetPos (), [PARCEL_DETAILS_OWNER]), 0);
    key parcel_group=llList2Key (llGetParcelDetails (llGetPos (), [PARCEL_DETAILS_GROUP]), 0);
    key object_owner=llGetOwnerKey(id);
    key object_group=llList2Key (llGetObjectDetails (id, [OBJECT_GROUP]), 0);
 
    debug("owner= " + (string) parcel_owner + " / " + (string) object_owner);
    debug("group= " + (string) parcel_group + " / " + (string) object_group);
 
    if (object_owner==llGetOwner ()        // IF I am the owner of the object
      || object_owner==parcel_owner        // OR its owner is the same as the parcel I'm on
      || object_group==parcel_group        // OR its group is the same as the parcel I'm on
    )
    {
        return TRUE;
    }
    return FALSE;
}
 
 
// Is this a simple request for information or a meta command like !release?
integer isSimpleRequest(list list_of_commands)
{
    integer len = llGetListLength(list_of_commands);
    integer i;
 
    // now check every single atomic command
    for (i=0; i < len; ++i)
    {
        string command = llList2String(list_of_commands, i);
        if (!isSimpleAtomicCommand(command))
        {
          return FALSE;
        }
    }
 
    // all atomic commands passed the test
    return TRUE;
}
 
// is this a simple atomar command
// (a command which only queries some information or releases restrictions)
// (e. g.: cmd ends with "=" and a number (@version, @getoutfit, @getattach) or is a !-meta-command)
integer isSimpleAtomicCommand(string cmd)
{
    // check right hand side of the "=" - sign
    integer index = llSubStringIndex (cmd, "=");
    if (index > -1) // there is a "="
    {
        // check for a number after the "="
        string param = llGetSubString (cmd, index + 1, -1);
        if ((integer)param!=0 || param=="0") // is it an integer (channel number)?
        {
            return TRUE;
        }
 
        // removing restriction
        if ((param == "y") || (param == "rem"))
        {
            return TRUE;
        }
    }
 
    // check for a leading ! (meta command)
    if (llSubStringIndex(cmd, PREFIX_METACOMMAND) == 0)
    {
        return TRUE;
    }
 
    // check for @clear
    // Note: @clear MUST NOT be used because the restrictions will be reapplied on next login
    // (but we need this check here because "!release|@clear" is a BROKEN attempt to work around
    // a bug in the first relay implementation. You should refuse to use relay versions < 1013
    // instead.)
    if (cmd == "@clear")
    {
        return TRUE;
    }
 
    // this one is not "simple".
    return FALSE;
}
 
// If we already have commands from this object pending
// because of a permission request dialog, just add the
// new commands at the end.
// Note: We use a timeout here because the player may
// have "ignored" the dialog.
integer tryToGluePendingCommands(key id, string commands)
{
    if (llStringLength(pendingMessage) > 4000)
    {
        llSay(0, llKey2Name(id) + " is flooding commands. Releasing restrictions.");
        releaseRestrictions();
        return TRUE;
    }
    if ((pendingId == id) && (pendingTime + PERMISSION_DIALOG_TIMEOUT > llGetUnixTime()))
    {
        debug("Gluing " + (string) pendingMessage + " with " + commands);
        pendingMessage = pendingMessage + "|" + commands;
        return TRUE;
    }
    return FALSE;
}
 
 
// accept !release even if out of range
handleCommandsWhichAreAcceptedOutOfRange(key id, string message)
{
    if (id != source)
    {
        return;
    }
 
    list tokens = llParseString2List (message, [","], []);
    if (llGetListLength (tokens) < 3)
    {
        return;
    }
    string commands = llList2String(tokens, 2);
    list list_of_commands = llParseString2List(commands, ["|"], []);
    if (llListFindList(list_of_commands, ["!release"]) > -1)
    {
        debug("accepted !release although it was out of range");
        releaseRestrictions();
    }
}
 
 
// verifies the permission. This includes mode
// (off, permission, auto) of the relay and the
// identity of the object (owned by parcel people).
integer verifyPermission(key id, string name, string message)
{
    // is it switched off?
    if (mode == MODE_OFF)
    {
        return FALSE;
    }
 
    list tokens = llParseString2List (message, [","], []);
    if (llGetListLength (tokens) < 3)
    {
        return FALSE;
    }
    string commands = llList2String(tokens, 2);
    list list_of_commands = llParseString2List(commands, ["|"], []);
 
    // if we are already having a pending permission-dialog request for THIS object,
    // just add the new commands at the end of the pending command list.
    if (tryToGluePendingCommands(id, commands))
    {
        return FALSE;
    }
 
    // accept harmless commands silently
    if (isSimpleRequest(list_of_commands))
    {
        return TRUE;
    }
 
    // check whether this object belongs here
    integer trustworthy = isObjectIdentityTrustworthy(id);
    string warning = "";
    if (!trustworthy)
    {
        warning = "\n\nWARNING: This object is not owned by the people owning this parcel. Unless you know the owner, you should deny this request.";
    }
 
    // ask in permission-request-mode and/OR in case the object identity is suspisous.
    if (mode == MODE_ASK || !trustworthy)
    {
        pendingId=id;
        pendingName=name;
        pendingMessage = message;
        pendingTime = llGetUnixTime();
        if (llKey2Name(llGetOwnerKey(id)) != "")
        {
            name += " (owned by " + llKey2Name(llGetOwnerKey(id)) + ")";
        }
 
        list temp = llGetObjectDetails(id, [OBJECT_POS]);
        vector pos = llList2Vector(temp, 0);
 
        string text = name
            + " at <" + (string) ((integer) pos.x)
            + ", " + (string) ((integer) pos.y)
            + ", " + (string) ((integer) pos.z)
            + "> (" + (string) ((integer) llVecDist(pos, llGetRootPosition())) + "m) "
            + "would like to control your viewer." + warning + ".\n\nDo you accept ?";
        debug("Asking for permission isNotEmbedded=" + (string) isNotEmbedded);
        if (isNotEmbedded)
        {
            llDialog (llGetOwner(), text, ["Yes", "No"], DIALOG_CHANNEL);
        }
        llMessageLinked(LINK_SET, ASK_LINK_CHANNEL, text, id);
        debug("Asking for permission");
        return FALSE;
    }
    return TRUE;
}
 
 
// ---------------------------------------------------
//              Executing of commands
// ---------------------------------------------------
 
// execute a non-parsed message
// this command could be denied here for policy reasons, (if it were implemenetd)
// but this time there will be an acknowledgement
execute(string name, key id, string message)
{
    list tokens = llParseString2List(message, [","], []);
    string cmd_id = llList2String(tokens, 0); // CheckAttach
    list list_of_commands = llParseString2List(llList2String(tokens, 2), ["|"], []);
 
    integer len = llGetListLength (list_of_commands);
    integer i;
    string command;
    string prefix;
    for (i=0; i<len; ++i) // execute every command one by one
    {
        // a command is a RL command if it starts with '@' or a metacommand if it starts with '!'
        command = llList2String(list_of_commands, i);
        prefix = llGetSubString(command, 0, 0);
 
        if (prefix == PREFIX_RL_COMMAND) // this is a RLV command
        {
            executeRLVCommand(cmd_id, id, command);
        }
        else if (prefix == PREFIX_METACOMMAND) // this is a metacommand, aimed at the relay itself
        {
            executeMetaCommand(cmd_id, id, command);
        }
    }
}
 
// executes a command for the restrained life viewer
// with some additinal magic like book keeping
executeRLVCommand(string cmd_id, string id, string command)
{
    command = llToLower(command);
    // we need to know whether whether is a rule or a simple command
    list tokens = llParseString2List(command, ["="], []);
    string behav = llList2String(tokens, 0); // @getattach:skull
    string param = llList2String(tokens, 1); // 2222
    integer ind = llListFindList(restrictions, [behav]);
 
    tokens = llParseString2List(behav, [":"], []); // @sit:<uuid>
    string behavName = llList2String (tokens, 0);  // @sit
    string option = llList2String (tokens, 1);    // <uuid>
 
    debug("executeRLVCommand: behav=!" + behav + "! param=!" + param + "!");
 
    if (isQuery(behavName) && ((integer) param <= 0))
    {
        // if this is a query command, don't accept public chat,
        // negative numbers, or pseudo channels like
        // "n", "add", "y", "rem", "force",  ...
        ack(cmd_id, id, command, "ko");
        return;
    }
 
    if (param=="n" || param=="add") // add to restrictions
    {
        if (ind < 0)
        {
            if (llGetListLength(restrictions) == 0)
            {
                sendRLCmd(RVL_COMMAND_START);
                llMessageLinked(LINK_SET, STATUS_LINK_CHANNEL, "start", id);
            }
            restrictions += [behav];
        }
        source = id; // we know that source is either NULL_KEY or id already
    }
    else if (param == "y" || param == "rem") // remove from restrictions
    {
        if (behavName == "@this-is-a-script-generated-message-beyond-the-control-of-the-agent")
        {
            ack(cmd_id, id, command, "ko");
            return;
        }
 
        if (ind > -1)
        {
            restrictions = llDeleteSubList (restrictions, ind, ind);
        }
        if (llGetListLength(restrictions) == 0)
        {
            source = NULL_KEY;
            sendRLCmd(RVL_COMMAND_END);
        }
        removeFromPendingList(behav);
    }
    else if (param == "force")
    {
        if (llListFindList(refusedForceCommands, [behavName]) >= 0)
        {
            debug("rejected force-command: behav=!" + behav + "! behavName=!" + behavName + "!");
            ack(cmd_id, id, command, "ko");
            return;
        }
    }
    else if (((integer) param <= 0) && (behavName != "@clear"))
    {
        // this is either an unknown param (not "n", "add", "y", "rem", "force")
        // or a query which should be answered on the public chat channel 0.
        // note negative channels are displayed as /-x on public chat.
        ack(cmd_id, id, command, "ko");
        return;
    }
 
    workaroundForAtClear(command);
    rememberForceSit(behavName, option, param);
    sendRLCmd(command); // execute command
    ack(cmd_id, id, command, "ok"); // acknowledge
}
 
// is this a query?
integer isQuery(string behav)
{
    if (llGetSubString(behav, 0, 3) == "@get")
    {
        return TRUE;
    }
    if (llGetSubString(behav, 0, 7) == "@version")
    {
        return TRUE;
    }
    if (llGetSubString(behav, 0, 10) == "@findfolder")
    {
        return TRUE;
    }
    return FALSE;
}
 
// check for @clear
// Note: @clear MUST NOT be used because the restrictions will be reapplied on next login
// (but we need this check here because "!release|@clear" is a BROKEN attempt to work around
// a bug in the first relay implementation. You should refuse to use relay versions < 1013
// instead.)
workaroundForAtClear(string command)
{
    if (command == "@clear")
    {
        releaseRestrictions();
    }
}
 
// remembers the time and object if this command is a force sit
rememberForceSit(string behavName, string option, string param)
{
    // clear lastForceSitDestination in case we are now prevented from standing up and
    // the force sit was long ago. Note: restrictions is checked to prevent the
    // clearance in case @unsit is just send again on login
    if (behavName == "@unsit")
    {
        if (llListFindList(restrictions, ["@unsit"]) < 0)
        {
            if (lastForceSitTime + MAX_TIME_AUTOACCEPT_AFTER_FORCESIT < llGetUnixTime())
            {
                debug("clearing lastForceSitDestination");
                lastForceSitDestination = NULL_KEY;
            }
        }
    }
 
    if (param != "force")
    {
        return;
    }
 
    debug("'force'-command:" + behavName + "/" + option);
    if (behavName != "@sit")
    {
        return;
    }
    lastForceSitDestination = (key) option;
    lastForceSitTime = llGetUnixTime();
    debug("remembered force sit");
}
 
// executes a meta command which is handled by the relay itself
executeMetaCommand(string cmd_id, string id, string command)
{
    if (command == PREFIX_METACOMMAND + "version") // checking relay protocol version
    {
        ack(cmd_id, id, command, (string) RLVRS_PROTOCOL_VERSION);
    }
    else if (command == PREFIX_METACOMMAND + "implversion") // checking relay version
    {
        ack(cmd_id, id, command, RLVRS_IMPL_VERSION);
    }
    else if (command == PREFIX_METACOMMAND + "release") // release all the restrictions (end session)
    {
        releaseRestrictions();
        ack(cmd_id, id, command, "ok");
    }
    else if (command == PREFIX_METACOMMAND + "pong")
    {
        loginWaitingForPong = FALSE;
    }
}
 
// removes a restriction from the list of pending commands
removeFromPendingList(string behav)
{
    string search = behav + "=";
 
    // don't do the expensive parsing (string operations are very slow in pre-
    // mono LSL) in case we can detect fast that this one is not in the list.
    if (llSubStringIndex(pendingMessage, search) < 0)
    {
        return;
    }
 
    list tokens = llParseString2List(pendingMessage, [","], []);
    list commands = llParseString2List(llList2String(tokens, 2), ["|"], []);
    integer modified = FALSE;
 
    integer len = llGetListLength(commands);
    integer i;
    for (i = len - 1; i >= 0; i--)
    {
        string cmd = llList2String(commands, i);
        if (llSubStringIndex(cmd, search) == 0)
        {
            if (llSubStringIndex(cmd, "=n") > -1 || llSubStringIndex(cmd, "=add") > -1)
            {
                commands = llDeleteSubList(commands, i, i);
                modified = TRUE;
            }
        }
    }
 
    if (modified)
    {
        if (llGetListLength(commands) > 0)
        {
            pendingMessage = llList2String(tokens, 0) + "," + llList2String(tokens, 1) + "," + llDumpList2String(commands, "|");
        }
        else
        {
            clearPendingMessages();
        }
    }
 
}
 
 
// lift all the restrictions (called by !release and by turning the relay off)
releaseRestrictions()
{
    integer i;
    integer len = llGetListLength (restrictions);
    for (i = 0; i < len; ++i)
    {
        sendRLCmd(llList2String (restrictions, i) + "=y");
    }
    sendRLCmd(RVL_COMMAND_END);
    lastForceSitDestination = NULL_KEY;
    restrictions = [];
    loginPendingForceSit = FALSE;
    clearPendingMessages();
    llMessageLinked(LINK_SET, STATUS_LINK_CHANNEL, "release", source);
    source = NULL_KEY;
}
 
// sends an !release,ok to the world object if we are in an active session
tellWorldObjectAboutCanceledSession()
{
    if (source != NULL_KEY)
    {
        ack("release", source, "!release", "ok");
    }
}
 
 
 
// deletes the list of pending messsages
clearPendingMessages()
{
    // clear pending request
    pendingName = "";
    pendingId = NULL_KEY;
    pendingMessage = "";
    pendingTime = 0;
}
 
 
// processes a message send on the relay channel
processRelayMessage(string name, key id, string message)
{
    if (mode== MODE_OFF)
    {
        debug("deactivated - ignoring commands");
        return; // mode is 0 (off) => reject
    }
 
    debug("LISTEN: " + message);
 
    if (!verifyWeAreTarget(message))
    {
      return;
    }
 
    if (!verifySourceType(id))
    {
        return;
    }
 
    debug("Got message (active world object " + (string) source + "): name=" + name+ " id=" + (string) id + " message=" + message);
 
    if (source)
    {
        if (source != id)
        {
            if (isObjectNear(source))
            {
                debug("already used by another object => reject");
                return;
            }
            else
            {
                debug("already used by another object, which is out of range");
                releaseRestrictions();
            }
        }
    }
 
    if (!isObjectNear(id))
    {
        handleCommandsWhichAreAcceptedOutOfRange(id, message);
        return;
    }
 
    if (!isObjectKnow(id))
    {
        debug("asking for permission because source is NULL_KEY");
        if (!verifyPermission(id, name, message))
        {
            return;
        }
    }
 
    debug("Executing: " + (string) source);
    execute(name, id, message);
}
 
// ---------------------------------------------------
//            mode and dialog handling
// ---------------------------------------------------
 
 
 
// shows current mode as string
showModeDescription()
{
    if (isNotEmbedded)
    {
        llOwnerSay(llList2String(MODE_DESCRIPTIONS, mode));
    }
    llMessageLinked(LINK_SET, STATUS_LINK_CHANNEL, "show_mode", (key) ((string) mode));
}
 
 
// process the Yes/No buttons of the permission dialog
processDialogResponse(key id, string message)
{
    if (pendingId)
    {
        if (message == "Yes") // pending request authorized => process it
        {
            execute(pendingName, pendingId, pendingMessage);
        }
        clearPendingMessages();
    }
}
 
 
 
// ---------------------------------------------------
//            initialisation and login handling
// ---------------------------------------------------
 
init() {
    sendRLCmd("@clear");
    llOwnerSay("Waiting for plugins to initialize...");
    llSleep(5);
 
    mode = MODE_ASK;
 
    llListen(RLVRS_CHANNEL, "", "", "");
    llListen(DIALOG_CHANNEL, "", llGetOwner(), "");
 
    if (llGetFreeMemory() < 10000)
    {
        llSay(0, llKey2Name(llGetOwner()) + ", your relay is having very little free script memory and is likly to crash during use. Please verify that it was compiled using Mono.");
    }
    llMessageLinked(LINK_SET, STATUS_LINK_CHANNEL, "init", (key) ((string) RLVRS_PROTOCOL_VERSION));
 
    llOwnerSay("Initialized and ready");
    debug("Free Memory: " + (string) llGetFreeMemory());
}
 
 
// sends the known restrictions (again) to the RL-viewer
// (call this functions on login)
reinforceKnownRestrictions()
{
    integer i;
    integer len = llGetListLength(restrictions);
    string restr;
    debug("source=" + (string) source);
    if (len > 0)
    {
        sendRLCmd(RVL_COMMAND_START);
    }
    for (i=0; i < len; ++i)
    {
        restr = llList2String(restrictions, i);
        debug("restr=" + restr);
        sendRLCmd(restr + "=n");
        if (restr == "@unsit")
        {
            loginPendingForceSit = TRUE;
        }
    }
}
 
// send a ping request and start a timer
pingWorldObjectIfUnderRestrictions()
{
    loginWaitingForPong = FALSE;
    if (source)
    {
        ack("ping", source, "ping", "ping");
        timerTickCounter = 0;
        llSetTimerEvent(1.0);
        loginWaitingForPong = TRUE;
    }
}
 
sendForceSitDuringLogin()
{
    key sitTarget = source;
    if (lastForceSitDestination)
    {
        sitTarget = lastForceSitDestination;
    }
    debug("Force sit during login on " + (string) sitTarget + " (source=" + (string) source + ", lastForceSitDestination=" + (string) lastForceSitDestination + ")");
    sendRLCmd ("@sit:" + (string) sitTarget + "=force");
}
 
 
// processes a timer event
processTimer()
{
    timerTickCounter++;
    debug("timer (" + (string) timerTickCounter + "): waiting for pong: " + (string) loginWaitingForPong + " pendingForceSit: " + (string) loginPendingForceSit);
    if (loginWaitingForPong && (timerTickCounter >= LOGIN_DELAY_WAIT_FOR_PONG))
    {
        llWhisper(0, "Lucky Day: " + llKey2Name(llGetOwner()) + " is freed because the device is not available.");
        loginWaitingForPong = FALSE;
        loginPendingForceSit = FALSE;
        releaseRestrictions();
    }
 
    if (loginPendingForceSit)
    {
        integer agentInfo = llGetAgentInfo(llGetOwner());
        if (agentInfo & AGENT_SITTING)
        {
            loginPendingForceSit = FALSE;
            debug("is sitting now");
        }
        else if (timerTickCounter == LOGIN_DELAY_WAIT_FOR_FORCE_SIT)
        {
            llWhisper(0, "Lucky Day: " + llKey2Name(llGetOwner()) + " is freed because sitting down again was not possible.");
            loginPendingForceSit = FALSE;
            releaseRestrictions();
        }
        else
        {
            sendForceSitDuringLogin();
        }
    }
 
    if (!loginPendingForceSit && !loginWaitingForPong)
    {
        llSetTimerEvent(0.0);
    }
}
 
processLinkMessage(key id, string message)
{
    if (message == "safeword")
    {
        llSay(0, llKey2Name(llGetOwner()) + " said the safeword. Freeing and deactivating relay.");
        tellWorldObjectAboutCanceledSession();
        releaseRestrictions();
        mode = MODE_OFF;
        showModeDescription();
        return;
    }
 
    if (message == "unlock")
    {
        if (id)
        {
            llSay(0, llKey2Name(id) + " freed " + llKey2Name(llGetOwner()) + " by unlocking the relay.");
            tellWorldObjectAboutCanceledSession();
        }
        releaseRestrictions();
        return;
    }
 
    if (message == "mode")
    {
        if (source)
        {
            llOwnerSay("Sorry, you cannot change the relay mode while it is active.");
            return;
        }
        mode = ((integer) ((string) id)) % 3;
        showModeDescription();
        return;
    }
 
    if (message == "refusedForceCommands")
    {
        refusedForceCommands = llParseString2List((string) id, [","], []);
        return;
    }
 
    if (message == "embedded")
    {
        isNotEmbedded = FALSE;
        return;
    }
}
 
 
default
{
    state_entry()
    {
        init();
    }
 
    on_rez(integer start_param)
    {
        // relogging, we must refresh the viewer and ping the object if any
        // if mode is not OFF, fire all the stored restrictions
        if (mode)
        {
            reinforceKnownRestrictions();
            pingWorldObjectIfUnderRestrictions();
        }
        // remind the current mode to the user
        showModeDescription();
    }
 
    attach(key id)
    {
        if (id == NULL_KEY)
        {
            tellWorldObjectAboutCanceledSession();
            releaseRestrictions();
        }
    }
 
    timer()
    {
        processTimer();
    }
 
    listen(integer channel, string name, key id, string message)
    {
        if (channel==RLVRS_CHANNEL)
        {
            processRelayMessage(name, id, message);
        }
        else if (channel==DIALOG_CHANNEL)
        {
            processDialogResponse(id, message);
        }
    }
 
    link_message(integer sender, integer channel, string message, key id)
    {
        if (channel == CMD_LINK_CHANNEL)
        {
            processLinkMessage(id, message);
        }
        else if (channel == DIALOG_LINK_CHANNEL)
        {
            processDialogResponse(id, message);
        }
    }
 
    touch_start(integer num_detected)
    {
        if (!isNotEmbedded)
        {
            return;
        }
 
        // touched by user => cycle through OFF/ON_PERMISSION/ON_ALWAYS modes
        key toucher = llDetectedKey(0);
        if (toucher != llGetOwner())
        {
            return;
        }
 
        if (source)
        {
            llOwnerSay("Sorry, you cannot change the relay mode while it is active.");
            return;
        }
        mode = (mode + 1) % 3;
        if (mode == MODE_OFF) {
            releaseRestrictions();
        }
        showModeDescription();
    }
 
    changed(integer change)
    {
        if (change & (CHANGED_OWNER | CHANGED_INVENTORY | CHANGED_ALLOWED_DROP))
        {
            llResetScript();
        }
    }
}
</lsl>

Latest revision as of 14:14, 10 May 2010

Restrained Love Relay



Introduction

Note: It is likely this relay implementation and this present page won't be updated anymore, as Maike Short's accounts have been banned (for some reasons you can easily find out and are not the topic here anyway). The code has been evolved by other people, and many in-world relays have been using it for months now: the relay developing community is more alive than ever. And there are new relays out there developed by smart people from scratch. Thank you Maike, for having made all of this possible!


Code

Note: The code on this page was highly outdated and incompatible with the current version of the second life server.

The assumptions that linked messages are a lot faster than said messages is not true anymore. It is not worth to fix the code because there are other free and open source implementations are out there that are way better by now. --Maike Short


Changes

1.040.e

  • workaround for a security issue causing the permission request dialog to be skipped or displayed twice because of a multi threading vulnerability. This issue did not occur in old versions of the Second Life Server software because processing of listen events used to be very slow compared to linked messages.
  • my change

1.040.d

  • added a filter option to ignore auto granting of permission. If you are sitting while under @acceptpermission a griefer who is not involved at all can get your animation permission while being several hundred meters away

1.040.c

  • fixed a !handover permission bug

1.040.b

  • added additional options to the filter (im, vision, windlight, avatar sex)
  • included permissionless tp in tp filter
  • included new rlv-commands in strip filter
  • clean up windlight settings on release if they have been messed with (does not reset daytime on every released, just when it is required)
  • some code cleanup

1.040.a

  • added support for multiple world objects
  • show world map with tp destination if force-tp is disabled

1.040

  • added support for !who which allows world objects to tell who controls them
  • added support for !handover to support inter-sim kidnappers leading directly into a trap and processing facilities that hand over the victim from one step to the next
  • added support for !vision script from the Think Kink PBA by Ilana Debevec and Chloe1982 Constantine)


1.030.c

  • Diff
  • fixed group check on parcels not set to a group (which matched objects set to (none), too (reported by Kitty Barnett)
  • fixed <0, 0, 0> pseudo object position in distance check (reported by Kitty Barnett).

1.030.b

  • Diff
  • fixed two faked avatar chat problems

1.030.a

  • Diff
  • Fixed the compatibility code for world objects that send @clear instead of !release broken by the security fix in 1.020.b

1.030

  • Diff
  • added "Temp Mute" in the ask dialog which will mute the object until the next time you login (in the extended controller script)
  • tell world objects if an active session is canceled by the relay.


1.020.c

  • Diff
  • Display position and distance in permission dialog

1.020.b

  • Diff
  • This is based on 1.015 and has all the fixed made there missing in Marine's 1.020 which is based on a very early version of 1.014
  • Filter automatic RLV replies on public chat channel 0 so that people cannot be tricked to say some foreign text out loud
  • Added "this-is-a-script-generated-message-beyond-the-control-of-the-agent/" at the beginning of @getstatus-replies on all channel
  • Note: Relays which do not add any restriction on their own (like @detach=n) may be abused using @gestatus to trigger dialog responses, gag talk or other scripts like "to buy as gift, say the name of the receiver on channel /x". Any version of the reference implementation smaller than (not including) 1.015 (but including 1.020 which is based on 1.014) are affected by this.

1.015

Retrieved from "https://wiki.secondlife.com/w/index.php?title=LSL_Protocol/Restrained_Living_Relay/Other_Implementations/Maike_Short%27s_Relay&oldid=909912"