157 lines
4 KiB
C
157 lines
4 KiB
C
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// CONTROL.H
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// Control by us, control of us
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//
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// Copyright (c) Microsoft 1997-
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//
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#ifndef _H_CA
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#define _H_CA
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//
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//
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// CONSTANTS
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//
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//
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#define CA_SEND_EVENT 0x0001
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#define CA_ALLOW_EVENT 0x0002
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//
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// Cleanup flags
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//
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#define CACLEAR_HOST 0x0001
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#define CACLEAR_VIEW 0x0002
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#define CACLEAR_ALL 0x0003
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//
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// Queued responses to control requests. We try to send them right away,
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// but that can fail.
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// Here's the logic:
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//
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// (1) For TAKING/RELEASING control (viewer)
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// There's only one at most pending. That's because a pending RELEASE
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// cancels out a pending TAKE.
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//
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// (2) For RESPONDING/REVOKING control (host)
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// These never cancel out. Each one will have a successive sequence ID.
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// There should NEVER be a pending BOUNCE in the queue with a
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// pending RESPOND for the same controller/request ID. Of course not,
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// since we don't change our state until the packet goes out,
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// and if the RESPOND CONFIRM packet hasn't gone out, we wouldn't
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// be bouncing anybody.
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//
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// Outgoing requests take precedence over incoming ones. In other words,
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// if the UI/user/SDK code asks us to take control of a remote, we will
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// turn any pending RESPOND CONFIRM packets into RESPOND DENIED ones. If
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// we are in control of another already, take will fail, it's the intermediate
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// phase that's undoable only.
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//
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// Here's the basic logic flow to TAKE CONTROL:
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// Viewer makes new sequence ID
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// Viewer sends private packet to host, requesting control
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// Viewer changes state to "asked for control"
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// Host receives private packet
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// Host sends private response packet to viewer, confirming or denying control
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// If confirming, host broadcasts notification to everybody sometime
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// later.
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// When viewer gets response, viewer moves to incontrol state, or
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// backs off
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//
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// Here's the basic logic flow to RELEASE CONTROL:
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// Viewer initiated:
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// Send INFORM RELEASED private packet to host
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// Change state to not in control
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// Host receives private packet
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// Host ignores if out of date (bounced already or whatever)
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// Host changes state to not controlled otherwise
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// Host initiated:
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// Send INFORM BOUNCED private packet to viewer
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// Change state to not controlled
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// Viewer receives private packet
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// Viewer ignores if out of date (released already or whatever)
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// Viewer changes state to not in control otherwise
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//
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// While pending take control, waiting to here confirmation, or in control
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// pending requests to control us are denied.
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//
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typedef union
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{
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CA_RTC_PACKET rtc;
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CA_REPLY_RTC_PACKET rrtc;
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CA_RGC_PACKET rgc;
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CA_REPLY_RGC_PACKET rrgc;
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CA_PPC_PACKET ppc;
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CA_INFORM_PACKET inform;
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}
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CA30P;
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typedef CA30P * PCA30P;
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class ASPerson;
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typedef struct tagCA30PENDING
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{
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ASPerson * pasReplyTo;
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UINT mcsOrg;
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UINT msg;
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CA30P request;
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}
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CA30PENDING;
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typedef CA30PENDING * PCA30PENDING;
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typedef struct tagCA30XREQ
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{
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CA30P packet;
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}
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CA30REQ;
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//
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// Private send/responses get queued up and our state can NOT change until
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// they go out.
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//
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typedef struct tagCAREQUEST
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{
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STRUCTURE_STAMP
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BASEDLIST chain;
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UINT destID;
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UINT msg;
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CA30REQ req30;
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}
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CAREQUEST;
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typedef CAREQUEST * PCAREQUEST;
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//
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// The location of the keyboard language toggle hotkey setting in the
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// registry.
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//
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#define LANGUAGE_TOGGLE_KEY "keyboard layout\\toggle"
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#define LANGUAGE_TOGGLE_KEY_VAL "Hotkey"
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//
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// A value we use to indicate that the registry entry is not present - it
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// could be any value except for '1', '2', or '3'
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//
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#define LANGUAGE_TOGGLE_NOT_PRESENT 0
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//
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// Query dialog
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//
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#define IDT_CAQUERY 50
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#define PERIOD_CAQUERY 30000 // 30 seconds
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INT_PTR CALLBACK CAQueryDlgProc(HWND, UINT, WPARAM, LPARAM);
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#endif // _H_CA
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