pei/scrcpy
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Replace SDL_net by custom implementation

Browse Source 
SDL_net is not very suitable for scrcpy.

For example, SDLNet_TCP_Accept() is non-blocking, so we have to wrap it
by calling many SDL_Net-specific functions to make it blocking.

But above all, SDLNet_TCP_Open() is a server socket only when no IP is
provided; otherwise, it's a client socket. Therefore, it is not possible
to create a server socket bound to localhost, so it accepts connections
from anywhere.

This is a problem for scrcpy, because on start, the application listens
for nearly 1 second until it accepts the first connection, supposedly
from the device. If someone on the local network manages to connect to
the server socket first, then they can stream arbitrary H.264 video.
This may be troublesome, for example during a public presentation ;-)

Provide our own simplified API (net.h) instead, implemented for the
different platforms.
This commit is contained in:
Romain Vimont
2018-02-15 22:59:21 +01:00
parent bf41e5479b
commit 9b056f5091
18 changed files with 178 additions and 95 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
app/src/decoder.h
View File

@@ -2,18 +2,20 @@
#define DECODER_H
#include <SDL2/SDL_stdinc.h>
#include <SDL2/SDL_net.h>
#include <SDL2/SDL_thread.h>
#include "net.h"
struct frames;
struct decoder {
struct frames *frames;
TCPsocket video_socket;
socket_t video_socket;
SDL_Thread *thread;
SDL_mutex *mutex;
};
void decoder_init(struct decoder *decoder, struct frames *frames, TCPsocket video_socket);
void decoder_init(struct decoder *decoder, struct frames *frames, socket_t video_socket);
SDL_bool decoder_start(struct decoder *decoder);
void decoder_stop(struct decoder *decoder);
void decoder_join(struct decoder *decoder);