blob: e59807385439e3a043be47e92e55eef7147a6114 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/***
This file is part of PulseAudio.
Copyright 2016 Ahmed S. Darwish <darwish.07@gmail.com>
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <pulsecore/core-util.h>
#include <pulsecore/creds.h>
#include <pulsecore/macro.h>
#include <pulsecore/pdispatch.h>
#include <pulsecore/pstream.h>
#include <pulsecore/tagstruct.h>
#include "native-common.h"
/*
* Command handlers shared between client and server
*/
/* Check pa_pstream_register_memfd_mempool() for further details */
int pa_common_command_register_memfd_shmid(pa_pstream *p, pa_pdispatch *pd, uint32_t version,
uint32_t command, pa_tagstruct *t) {
#if defined(HAVE_CREDS) && defined(HAVE_MEMFD)
pa_cmsg_ancil_data *ancil = NULL;
unsigned shm_id;
int ret = -1;
pa_assert(pd);
pa_assert(command == PA_COMMAND_REGISTER_MEMFD_SHMID);
pa_assert(t);
ancil = pa_pdispatch_take_ancil_data(pd);
if (!ancil)
goto finish;
/* Upon fd leaks and reaching our open fd limit, recvmsg(2)
* just strips all passed fds from the ancillary data */
if (ancil->nfd == 0) {
pa_log("Expected 1 memfd fd to be received over pipe; got 0");
pa_log("Did we reach our open file descriptors limit?");
goto finish;
}
if (ancil->nfd != 1 || ancil->fds[0] == -1)
goto finish;
if (version < 31 || pa_tagstruct_getu32(t, &shm_id) < 0 || !pa_tagstruct_eof(t))
goto finish;
if (pa_pstream_attach_memfd_shmid(p, shm_id, ancil->fds[0]))
goto finish;
ret = 0;
finish:
if (ancil)
pa_cmsg_ancil_data_close_fds(ancil);
return ret;
#else
return -1;
#endif
}
|
