C++ (Cpp) channel_request_remote_forwarding Examples

Example #1

File: clientloop.c Project: OpenDarwin-CVS/SEDarwin

static void
process_cmdline(void)
{
	void (*handler)(int);
	char *s, *cmd;
	u_short fwd_port, fwd_host_port;
	char buf[1024], sfwd_port[6], sfwd_host_port[6];
	int local = 0;

	leave_raw_mode();
	handler = signal(SIGINT, SIG_IGN);
	cmd = s = read_passphrase("\r\nssh> ", RP_ECHO);
	if (s == NULL)
		goto out;
	while (*s && isspace(*s))
		s++;
	if (*s == 0)
		goto out;
	if (strlen(s) < 2 || s[0] != '-' || !(s[1] == 'L' || s[1] == 'R')) {
		logit("Invalid command.");
		goto out;
	}
	if (s[1] == 'L')
		local = 1;
	if (!local && !compat20) {
		logit("Not supported for SSH protocol version 1.");
		goto out;
	}
	s += 2;
	while (*s && isspace(*s))
		s++;

	if (sscanf(s, "%5[0-9]:%255[^:]:%5[0-9]",
	    sfwd_port, buf, sfwd_host_port) != 3 &&
	    sscanf(s, "%5[0-9]/%255[^/]/%5[0-9]",
	    sfwd_port, buf, sfwd_host_port) != 3) {
		logit("Bad forwarding specification.");
		goto out;
	}
	if ((fwd_port = a2port(sfwd_port)) == 0 ||
	    (fwd_host_port = a2port(sfwd_host_port)) == 0) {
		logit("Bad forwarding port(s).");
		goto out;
	}
	if (local) {
		if (channel_setup_local_fwd_listener(fwd_port, buf,
		    fwd_host_port, options.gateway_ports) < 0) {
			logit("Port forwarding failed.");
			goto out;
		}
	} else
		channel_request_remote_forwarding(fwd_port, buf,
		    fwd_host_port);
	logit("Forwarding port.");
out:
	signal(SIGINT, handler);
	enter_raw_mode();
	if (cmd)
		xfree(cmd);
}

Example #2

File: ssh.c Project: msoulard/openssh-server-passlog

static void
ssh_init_forwarding(void)
{
	int success = 0;
	int i;

	/* Initiate local TCP/IP port forwardings. */
	for (i = 0; i < options.num_local_forwards; i++) {
		debug("Local connections to %.200s:%d forwarded to remote "
		    "address %.200s:%d",
		    (options.local_forwards[i].listen_host == NULL) ?
		    (options.gateway_ports ? "*" : "LOCALHOST") :
		    options.local_forwards[i].listen_host,
		    options.local_forwards[i].listen_port,
		    options.local_forwards[i].connect_host,
		    options.local_forwards[i].connect_port);
		success += channel_setup_local_fwd_listener(
		    options.local_forwards[i].listen_host,
		    options.local_forwards[i].listen_port,
		    options.local_forwards[i].connect_host,
		    options.local_forwards[i].connect_port,
		    options.gateway_ports);
	}
	if (i > 0 && success != i && options.exit_on_forward_failure)
		fatal("Could not request local forwarding.");
	if (i > 0 && success == 0)
		error("Could not request local forwarding.");

	/* Initiate remote TCP/IP port forwardings. */
	for (i = 0; i < options.num_remote_forwards; i++) {
		debug("Remote connections from %.200s:%d forwarded to "
		    "local address %.200s:%d",
		    (options.remote_forwards[i].listen_host == NULL) ?
		    "LOCALHOST" : options.remote_forwards[i].listen_host,
		    options.remote_forwards[i].listen_port,
		    options.remote_forwards[i].connect_host,
		    options.remote_forwards[i].connect_port);
		options.remote_forwards[i].handle =
		    channel_request_remote_forwarding(
		    options.remote_forwards[i].listen_host,
		    options.remote_forwards[i].listen_port,
		    options.remote_forwards[i].connect_host,
		    options.remote_forwards[i].connect_port);
		if (options.remote_forwards[i].handle < 0) {
			if (options.exit_on_forward_failure)
				fatal("Could not request remote forwarding.");
			else
				logit("Warning: Could not request remote "
				    "forwarding.");
		} else {
			client_register_global_confirm(ssh_confirm_remote_forward,
			    &options.remote_forwards[i]);
		}
	}

	/* Initiate tunnel forwarding. */
	if (options.tun_open != SSH_TUNMODE_NO) {
		if (client_request_tun_fwd(options.tun_open,
		    options.tun_local, options.tun_remote) == -1) {
			if (options.exit_on_forward_failure)
				fatal("Could not request tunnel forwarding.");
			else
				error("Could not request tunnel forwarding.");
		}
	}			
}