You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
103 lines
2.2 KiB
103 lines
2.2 KiB
/**
|
|
* @example backchannel-client.c
|
|
* A simple example of an RFB client
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <time.h>
|
|
#include <errno.h>
|
|
#include <rfb/rfbclient.h>
|
|
|
|
static void HandleRect(rfbClient* client, int x, int y, int w, int h) {
|
|
}
|
|
|
|
/*
|
|
* The client part of the back channel extension example.
|
|
*
|
|
*/
|
|
|
|
#define rfbBackChannel 155
|
|
|
|
typedef struct backChannelMsg {
|
|
uint8_t type;
|
|
uint8_t pad1;
|
|
uint16_t pad2;
|
|
uint32_t size;
|
|
} backChannelMsg;
|
|
|
|
static void sendMessage(rfbClient* client, char* text)
|
|
{
|
|
backChannelMsg msg;
|
|
uint32_t length = strlen(text)+1;
|
|
|
|
msg.type = rfbBackChannel;
|
|
msg.size = rfbClientSwap32IfLE(length);
|
|
if(!WriteToRFBServer(client, (char*)&msg, sizeof(msg)) ||
|
|
!WriteToRFBServer(client, text, length)) {
|
|
rfbClientLog("enableBackChannel: write error (%d: %s)", errno, strerror(errno));
|
|
}
|
|
}
|
|
|
|
static rfbBool handleBackChannelMessage(rfbClient* client,
|
|
rfbServerToClientMsg* message)
|
|
{
|
|
backChannelMsg msg;
|
|
char* text;
|
|
|
|
if(message->type != rfbBackChannel)
|
|
return FALSE;
|
|
|
|
rfbClientSetClientData(client, sendMessage, sendMessage);
|
|
|
|
if(!ReadFromRFBServer(client, ((char*)&msg)+1, sizeof(msg)-1))
|
|
return TRUE;
|
|
msg.size = rfbClientSwap32IfLE(msg.size);
|
|
text = malloc(msg.size);
|
|
if(!ReadFromRFBServer(client, text, msg.size)) {
|
|
free(text);
|
|
return TRUE;
|
|
}
|
|
|
|
rfbClientLog("got back channel message: %s\n", text);
|
|
free(text);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static int backChannelEncodings[] = { rfbBackChannel, 0 };
|
|
|
|
static rfbClientProtocolExtension backChannel = {
|
|
backChannelEncodings, /* encodings */
|
|
NULL, /* handleEncoding */
|
|
handleBackChannelMessage, /* handleMessage */
|
|
NULL /* next extension */
|
|
};
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
rfbClient* client = rfbGetClient(8,3,4);
|
|
|
|
client->GotFrameBufferUpdate = HandleRect;
|
|
rfbClientRegisterExtension(&backChannel);
|
|
|
|
if (!rfbInitClient(client,&argc,argv))
|
|
return 1;
|
|
|
|
while (1) {
|
|
/* After each idle second, send a message */
|
|
if(WaitForMessage(client,1000000)>0)
|
|
HandleRFBServerMessage(client);
|
|
else if(rfbClientGetClientData(client, sendMessage))
|
|
sendMessage(client, "Dear Server,\n"
|
|
"thank you for understanding "
|
|
"back channel messages!");
|
|
}
|
|
|
|
rfbClientCleanup(client);
|
|
|
|
return 0;
|
|
}
|
|
|