stream: Add basic stream service for systemd sockets
[strongswan.git] / src / libstrongswan / networking / streams / stream_service_systemd.c
1 /*
2 * Copyright (C) 2017 aszlig
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to
6 * deal in the Software without restriction, including without limitation the
7 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
8 * sell copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
20 * IN THE SOFTWARE.
21 */
22
23 #include <systemd/sd-daemon.h>
24
25 #include <library.h>
26
27 /**
28 * See header
29 */
30 stream_service_t *stream_service_create_systemd(char *uri, int backlog)
31 {
32 int i, num_fds, fd;
33 char **fdmap;
34
35 if (!strpfx(uri, "systemd://"))
36 {
37 DBG1(DBG_NET, "invalid stream URI: '%s'", uri);
38 return NULL;
39 }
40 uri += strlen("systemd://");
41
42 num_fds = sd_listen_fds_with_names(0, &fdmap);
43 if (num_fds <= 0)
44 {
45 DBG1(DBG_NET, "no systemd sockets for '%s'", uri);
46 return NULL;
47 }
48
49 for (i = 0, fd = -1; i < num_fds; i++)
50 {
51 if (fd == -1 && streq(fdmap[i], uri))
52 {
53 fd = SD_LISTEN_FDS_START + i;
54 }
55 free(fdmap[i]);
56 }
57 free(fdmap);
58
59 if (fd == -1)
60 {
61 DBG1(DBG_NET, "unable to find systemd FD for '%s'", uri);
62 return NULL;
63 }
64 return stream_service_create_from_fd(fd);
65 }