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100 lines
2.2 KiB
100 lines
2.2 KiB
19 years ago
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/* A simple example of an RFB client */
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <errno.h>
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#include <rfb/rfbclient.h>
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static void HandleRect(rfbClient* client, int x, int y, int w, int h) {
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}
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/*
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* The client part of the back channel extension example.
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*
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*/
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#define rfbBackChannel 155
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typedef struct backChannelMsg {
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uint8_t type;
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uint8_t pad1;
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uint16_t pad2;
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uint32_t size;
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} backChannelMsg;
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static void sendMessage(rfbClient* client, char* text)
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{
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backChannelMsg msg;
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uint32_t length = strlen(text)+1;
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msg.type = rfbBackChannel;
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msg.size = rfbClientSwap32IfLE(length);
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if(!WriteToRFBServer(client, (char*)&msg, sizeof(msg)) ||
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!WriteToRFBServer(client, text, length)) {
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rfbClientLog("enableBackChannel: write error (%d: %s)", errno, strerror(errno));
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}
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}
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static rfbBool handleBackChannelMessage(rfbClient* client,
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rfbServerToClientMsg* message)
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{
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backChannelMsg msg;
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char* text;
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if(message->type != rfbBackChannel)
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return FALSE;
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rfbClientSetClientData(client, sendMessage, sendMessage);
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if(!ReadFromRFBServer(client, ((char*)&msg)+1, sizeof(msg)-1))
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return TRUE;
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msg.size = rfbClientSwap32IfLE(msg.size);
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text = malloc(msg.size);
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if(!ReadFromRFBServer(client, text, msg.size)) {
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free(text);
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return TRUE;
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}
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rfbClientLog("got back channel message: %s\n", text);
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free(text);
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return TRUE;
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}
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static int backChannelEncodings[] = { rfbBackChannel, 0 };
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static rfbClientProtocolExtension backChannel = {
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backChannelEncodings, /* encodings */
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NULL, /* handleEncoding */
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handleBackChannelMessage, /* handleMessage */
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NULL /* next extension */
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};
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int
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main(int argc, char **argv)
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{
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rfbClient* client = rfbGetClient(8,3,4);
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client->GotFrameBufferUpdate = HandleRect;
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rfbClientRegisterExtension(&backChannel);
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if (!rfbInitClient(client,&argc,argv))
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return 1;
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while (1) {
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/* After each idle second, send a message */
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if(WaitForMessage(client,1000000)>0)
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HandleRFBServerMessage(client);
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else if(rfbClientGetClientData(client, sendMessage))
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sendMessage(client, "Dear Server,\n"
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"thank you for understanding "
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"back channel messages!");
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}
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rfbClientCleanup(client);
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return 0;
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}
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