317 lines
11 KiB
C
317 lines
11 KiB
C
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/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_RFB_SERVER_H
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#define ANDROID_RFB_SERVER_H
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#include <stdint.h>
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <unistd.h>
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#include <arpa/inet.h>
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#include <utils/Errors.h>
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#include <utils/threads.h>
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#include <ui/Region.h>
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#include <ui/PixelFormat.h>
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#include <pixelflinger/pixelflinger.h>
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#include "Barrier.h"
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namespace android {
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class SurfaceFlinger;
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class RFBServer : public Thread
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{
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public:
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RFBServer(uint32_t w, uint32_t h, android::PixelFormat format);
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virtual ~RFBServer();
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void frameBufferUpdated(const GGLSurface& front, const Region& reg);
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bool isConnected() const;
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private:
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typedef uint8_t card8;
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typedef uint16_t card16;
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typedef uint32_t card32;
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struct Message {
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Message(size_t size);
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virtual ~Message();
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void* payload(int offset=0) {
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return static_cast<char*>(mPayload)+offset;
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}
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void const * payload(int offset=0) const {
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return static_cast<char const *>(mPayload)+offset;
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}
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size_t size() const { return mSize; }
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protected:
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Message(void* payload, size_t size);
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status_t resize(size_t size);
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private:
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void* mPayload;
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size_t mSize;
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size_t mAllocatedSize;
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};
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struct ProtocolVersion : public Message {
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ProtocolVersion(uint8_t major, uint8_t minor)
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: Message(&messageData, 12) {
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char* p = static_cast<char*>(payload());
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snprintf(p, 13, "RFB %03u.%03u%c", major, minor, 0xA);
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}
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status_t decode(int& maj, int& min) {
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char* p = static_cast<char*>(payload());
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int n = sscanf(p, "RFB %03u.%03u", &maj, &min);
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return (n == 2) ? NO_ERROR : NOT_ENOUGH_DATA;
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}
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private:
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char messageData[12+1];
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};
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struct Authentication : public Message {
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enum { Failed=0, None=1, Vnc=2 };
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Authentication(int auth) : Message(&messageData, 4) {
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*static_cast<card32*>(payload()) = htonl(auth);
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}
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private:
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card32 messageData;
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};
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struct ClientInitialization : public Message {
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ClientInitialization() : Message(&messageData, 1) { }
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int sharedFlags() {
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return messageData;
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}
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private:
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card8 messageData;
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};
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struct PixelFormat {
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card8 bitsPerPixel;
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card8 depth;
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card8 bigEndianFlag;
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card8 trueColorFlag;
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card16 redMax;
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card16 greenMax;
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card16 blueMax;
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card8 redShift;
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card8 greenShift;
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card8 blueShift;
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uint8_t padding[3];
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} __attribute__((packed));
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struct ServerInitialization : public Message {
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ServerInitialization(char const * name)
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: Message(sizeof(Payload) + strlen(name))
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{
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const size_t nameLength = size() - sizeof(Payload);
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message().nameLength = htonl(nameLength);
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memcpy((char*)message().nameString, name,nameLength);
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}
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struct Payload {
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card16 framebufferWidth;
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card16 framebufferHeight;
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PixelFormat serverPixelFormat;
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card32 nameLength;
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card8 nameString[0];
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} __attribute__((packed));
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Payload& message() {
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return *static_cast<Payload*>(payload());
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}
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};
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// client messages...
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struct SetPixelFormat {
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card8 type;
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uint8_t padding[3];
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PixelFormat pixelFormat;
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} __attribute__((packed));
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struct SetEncodings {
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enum { Raw=0, CoR=1, RRE=2, CoRRE=4, Hextile=5 };
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card8 type;
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uint8_t padding;
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card16 numberOfEncodings;
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card32 encodings[0];
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} __attribute__((packed));
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struct FrameBufferUpdateRequest {
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card8 type;
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card8 incremental;
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card16 x;
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card16 y;
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card16 width;
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card16 height;
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} __attribute__((packed));
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struct KeyEvent {
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card8 type;
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card8 downFlag;
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uint8_t padding[2];
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card32 key;
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} __attribute__((packed));
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struct PointerEvent {
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card8 type;
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card8 buttonMask;
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card16 x;
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card16 y;
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} __attribute__((packed));
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struct ClientCutText {
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card8 type;
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uint8_t padding[3];
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card32 length;
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card8 text[0];
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} __attribute__((packed));
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union ClientMessages {
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card8 type;
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SetPixelFormat setPixelFormat;
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SetEncodings setEncodings;
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FrameBufferUpdateRequest frameBufferUpdateRequest;
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KeyEvent keyEvent;
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PointerEvent pointerEvent;
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ClientCutText clientCutText;
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};
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struct Rectangle {
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card16 x;
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card16 y;
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card16 w;
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card16 h;
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card32 encoding;
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} __attribute__((packed));
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struct FrameBufferUpdate {
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card8 type;
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uint8_t padding;
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card16 numberOfRectangles;
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Rectangle rectangles[0];
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} __attribute__((packed));
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enum {
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SET_PIXEL_FORMAT = 0,
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FIX_COLOUR_MAP_ENTRIES = 1,
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SET_ENCODINGS = 2,
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FRAME_BUFFER_UPDATE_REQ = 3,
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KEY_EVENT = 4,
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POINTER_EVENT = 5,
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CLIENT_CUT_TEXT = 6,
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};
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struct ClientMessage : public Message {
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ClientMessage()
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: Message(&messageData, sizeof(messageData)) {
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}
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const ClientMessages& messages() const {
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return *static_cast<ClientMessages const *>(payload());
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}
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const int type() const {
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return messages().type;
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}
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status_t resize(size_t size) {
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return Message::resize(size);
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}
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ClientMessages messageData;
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};
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class ServerThread : public Thread
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{
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friend class RFBServer;
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public:
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ServerThread(const sp<RFBServer>& receiver);
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virtual ~ServerThread();
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void wake();
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void exitAndWait();
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private:
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virtual bool threadLoop();
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virtual status_t readyToRun();
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virtual void onFirstRef();
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wp<RFBServer> mReceiver;
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bool (RFBServer::*mAction)();
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Barrier mUpdateBarrier;
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};
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class EventInjector {
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public:
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enum { UP=0, DOWN=1 };
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EventInjector();
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~EventInjector();
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void injectKey(uint16_t code, uint16_t value);
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private:
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struct input_event {
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struct timeval time;
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uint16_t type;
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uint16_t code;
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uint32_t value;
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};
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int mFD;
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};
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void handshake(uint8_t major, uint8_t minor, uint32_t auth);
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void waitForClientMessage(ClientMessage& msg);
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void handleClientMessage(const ClientMessage& msg);
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void handleSetPixelFormat(const SetPixelFormat& msg);
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void handleSetEncodings(const SetEncodings& msg);
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void handleFrameBufferUpdateReq(const FrameBufferUpdateRequest& msg);
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void handleKeyEvent(const KeyEvent& msg);
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void sendFrameBufferUpdates();
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bool validatePixelFormat(const PixelFormat& pf);
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bool alive() const;
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bool write(const Message& msg);
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bool read(Message& msg);
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bool write(const void* buffer, int size);
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bool read(void* buffer, int size);
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virtual bool threadLoop();
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virtual status_t readyToRun();
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virtual void onFirstRef();
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sp<ServerThread> mRobinThread;
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int mFD;
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int mStatus;
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iovec* mIoVec;
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EventInjector mEventInjector;
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Mutex mRegionLock;
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// This is the region requested by the client since the last
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// time we updated it
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Region mClientRegionRequest;
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// This is the region of the screen that needs to be sent to the
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// client since the last time we updated it.
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// Typically this is the dirty region, but not necessarily, for
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// instance if the client asked for a non incremental update.
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Region mDirtyRegion;
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GGLSurface mFrameBuffer;
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GGLSurface mFrontBuffer;
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};
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}; // namespace android
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#endif // ANDROID_RFB_SERVER_H
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