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Code Issues Releases Wiki Activity

added communication security layer to refetch unclompleted pakages

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This commit is contained in:
Stephan Müller 2017-11-16 12:22:37 +01:00
parent 9a74c8d1e4
commit 6e7234b544
2 changed files with 36 additions and 21 deletions
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11
app-android/app/src/main/java/at/bitfire/gfxtablet/NetworkServer.java
View file

@ -32,14 +32,15 @@ public class NetworkServer implements Runnable {
CanvasActivity.get().sendMotionStopSignal();
CanvasActivity.get().refreshBackground();
while (true) {
byte[] buf = new byte[60030];
byte[] buf = new byte[60031];
DatagramPacket packet = new DatagramPacket(buf, buf.length);
socket.receive(packet);
int n = buf[60029];
Log.i("receive:", String.valueOf(n));
if (n != 0){
packets = buf[60030];
buffer.put(n, buf);
} else if (buffer.size() > 0 ) {
} else if (buffer.size() == packets) {
try {
String path = CanvasActivity.SCREEN_PATH;
boolean parts = buffer.size() == (int) buf[0];
@ -71,8 +72,12 @@ public class NetworkServer implements Runnable {
} catch (IOException e) {
e.printStackTrace();
}
//compile image and set it
buffer.clear();
} else {
buffer.clear();
//compile image and set it
CanvasActivity.get().refreshBackground();
Log.i("PacketProblem", "Did not receive all packages - refreshing - " + String.valueOf(buffer.size()) + " and " + String.valueOf(packets));
}
}
} catch (Exception e) {

34
driver-uinput/networktablet.c
View file

@ -1,8 +1,7 @@
/* Compile with
* gcc networktablet.c -lX11 `pkg-config --cflags --libs gtk+-3.0`
* */
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/X.h>
#include <cairo.h>
#include <cairo-xlib.h>
#include <pthread.h>
#include <stdio.h>
@ -126,17 +125,19 @@ void msleep(int ms){
}
void *send_current_screen(void *arg){
while (sending) {
msleep(500);
}
printf("\nsend_thread\n");
sending_t *args = (sending_t*) arg;
sockaddr_in from = args->from;
int slen = args->slen;
Display *disp = XOpenDisplay(":0");
if (sending || !disp) {
if (!disp) {
return NULL;
}
printf("\nsend_thread\n");
msleep(300);
sending=1;
Window root;
cairo_surface_t *surface;
@ -158,14 +159,21 @@ void *send_current_screen(void *arg){
}
from.sin_port = htons(GFXTABLET_PORT);
int max=60000;
char buff[max+30];
char buff[max+31];
int n=1;
fseek(istream, 0, SEEK_END); // seek to end of file
long size = ftell(istream); // get current file pointer
int packets = size / max + 1;
fseek(istream, 0, SEEK_SET); // seek back to beginning of file
while (fread(buff, sizeof(char), max, istream) != 0) {
printf("Send packet to %s:%d\n", inet_ntoa(from.sin_addr), ntohs(from.sin_port));
printf("Send packet to %s:%d - %d of %d\n", inet_ntoa(from.sin_addr), ntohs(from.sin_port), n, packets);
buff[max +29] = n;
buff[max +30] = packets;
if (sendto(udp_socket, buff, sizeof(buff), 0, (struct sockaddr*) &from, slen) == -1){
die("sendto()");
}
msleep(10);
n++;
for (int r = 0; r <= max ; r++){
buff[r] = 0;
@ -218,9 +226,11 @@ int main(void){
ev_pkt.pressure = ntohs(ev_pkt.pressure);
printf("x: %hu, y: %hu, pressure: %hu\n", ev_pkt.x, ev_pkt.y, ev_pkt.pressure);
if (ev_pkt.x != 0 && ev_pkt.y != 0) {
send_event(device, EV_ABS, ABS_X, ev_pkt.x);
send_event(device, EV_ABS, ABS_Y, ev_pkt.y);
send_event(device, EV_ABS, ABS_PRESSURE, ev_pkt.pressure);
}
switch (ev_pkt.type) {
case EVENT_TYPE_MOTION:
@ -244,13 +254,13 @@ int main(void){
break;
}
if (ev_pkt.pressure == 0 && memcmp(inet_ntoa(sock_t.from.sin_addr), "0.0.0.0", 7) != 0) {
if(pthread_create(&screen_send_t, NULL, send_current_screen, &sock_t)) {
if (ev_pkt.down == 0 && ev_pkt.pressure == 0 &&
memcmp(inet_ntoa(sock_t.from.sin_addr), "0.0.0.0", 7) != 0 &&
pthread_create(&screen_send_t, NULL, send_current_screen, &sock_t)) {
fprintf(stderr, "Error creating thread\n");
return 1;
}
}
}
close(udp_socket);
printf("Removing network tablet from device list\n");