1/* swc: launch/protocol.h
 2 *
 3 * Copyright (c) 2013, 2014 Michael Forney
 4 *
 5 * Permission is hereby granted, free of charge, to any person obtaining a copy
 6 * of this software and associated documentation files (the "Software"), to deal
 7 * in the Software without restriction, including without limitation the rights
 8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 * copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 */
23
24#ifndef SWC_LAUNCH_PROTOCOL_H
25#define SWC_LAUNCH_PROTOCOL_H
26
27#include <stdbool.h>
28#include <stdint.h>
29#include <sys/types.h>
30
31#define SWC_LAUNCH_SOCKET_ENV "SWC_LAUNCH_SOCKET"
32#define SWC_LAUNCH_TTY_ENV "SWC_LAUNCH_TTY"
33
34struct iovec;
35
36struct swc_launch_request {
37	enum {
38		SWC_LAUNCH_REQUEST_OPEN_DEVICE,
39		SWC_LAUNCH_REQUEST_ACTIVATE_VT,
40	} type;
41
42	uint32_t serial;
43
44	union {
45		struct /* OPEN_DEVICE */ {
46			int flags;
47		};
48		struct /* ACTIVATE_VT */ {
49			unsigned vt;
50		};
51	};
52};
53
54struct swc_launch_event {
55	enum {
56		SWC_LAUNCH_EVENT_RESPONSE,
57		SWC_LAUNCH_EVENT_ACTIVATE,
58		SWC_LAUNCH_EVENT_DEACTIVATE,
59	} type;
60
61	union {
62		struct /* RESPONSE */ {
63			uint32_t serial;
64			bool success;
65		};
66	};
67};
68
69ssize_t
70send_fd(int socket, int fd, struct iovec *iov, int iovlen);
71ssize_t
72receive_fd(int socket, int *fd, struct iovec *iov, int iovlen);
73
74#endif