1/***
2  This file is part of PulseAudio.
3
4  Copyright 2004-2006 Lennart Poettering
5
6  PulseAudio is free software; you can redistribute it and/or modify
7  it under the terms of the GNU Lesser General Public License as published
8  by the Free Software Foundation; either version 2.1 of the License,
9  or (at your option) any later version.
10
11  PulseAudio is distributed in the hope that it will be useful, but
12  WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  General Public License for more details.
15
16  You should have received a copy of the GNU Lesser General Public License
17  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
18***/
19
20#ifdef HAVE_CONFIG_H
21#include <config.h>
22#endif
23
24#include <stdlib.h>
25
26#include <pulse/xmalloc.h>
27
28#include <pulsecore/cli.h>
29#include <pulsecore/log.h>
30#include <pulsecore/macro.h>
31#include <pulsecore/shared.h>
32
33#include "protocol-cli.h"
34
35/* Don't allow more than this many concurrent connections */
36#define MAX_CONNECTIONS 25
37
38struct pa_cli_protocol {
39    PA_REFCNT_DECLARE;
40
41    pa_core *core;
42    pa_idxset *connections;
43};
44
45static void cli_unlink(pa_cli_protocol *p, pa_cli *c) {
46    pa_assert(p);
47    pa_assert(c);
48
49    pa_idxset_remove_by_data(p->connections, c, NULL);
50    pa_cli_free(c);
51}
52
53static void cli_eof_cb(pa_cli*c, void*userdata) {
54    pa_cli_protocol *p = userdata;
55    pa_assert(p);
56
57    cli_unlink(p, c);
58}
59
60void pa_cli_protocol_connect(pa_cli_protocol *p, pa_iochannel *io, pa_module *m) {
61    pa_cli *c;
62
63    pa_assert(p);
64    pa_assert(io);
65    pa_assert(m);
66
67    if (pa_idxset_size(p->connections)+1 > MAX_CONNECTIONS) {
68        pa_log("Warning! Too many connections (%u), dropping incoming connection.", MAX_CONNECTIONS);
69        pa_iochannel_free(io);
70        return;
71    }
72
73    c = pa_cli_new(p->core, io, m);
74    pa_cli_set_eof_callback(c, cli_eof_cb, p);
75
76    pa_idxset_put(p->connections, c, NULL);
77}
78
79void pa_cli_protocol_disconnect(pa_cli_protocol *p, pa_module *m) {
80    pa_cli *c;
81    void *state = NULL;
82
83    pa_assert(p);
84    pa_assert(m);
85
86    while ((c = pa_idxset_iterate(p->connections, &state, NULL)))
87        if (pa_cli_get_module(c) == m)
88            cli_unlink(p, c);
89}
90
91static pa_cli_protocol* cli_protocol_new(pa_core *c) {
92    pa_cli_protocol *p;
93
94    pa_assert(c);
95
96    p = pa_xnew(pa_cli_protocol, 1);
97    PA_REFCNT_INIT(p);
98    p->core = c;
99    p->connections = pa_idxset_new(NULL, NULL);
100
101    pa_assert_se(pa_shared_set(c, "cli-protocol", p) >= 0);
102
103    return p;
104}
105
106pa_cli_protocol* pa_cli_protocol_get(pa_core *c) {
107    pa_cli_protocol *p;
108
109    if ((p = pa_shared_get(c, "cli-protocol")))
110        return pa_cli_protocol_ref(p);
111
112    return cli_protocol_new(c);
113}
114
115pa_cli_protocol* pa_cli_protocol_ref(pa_cli_protocol *p) {
116    pa_assert(p);
117    pa_assert(PA_REFCNT_VALUE(p) >= 1);
118
119    PA_REFCNT_INC(p);
120
121    return p;
122}
123
124void pa_cli_protocol_unref(pa_cli_protocol *p) {
125    pa_cli *c;
126    pa_assert(p);
127    pa_assert(PA_REFCNT_VALUE(p) >= 1);
128
129    if (PA_REFCNT_DEC(p) > 0)
130        return;
131
132    while ((c = pa_idxset_first(p->connections, NULL)))
133        cli_unlink(p, c);
134
135    pa_idxset_free(p->connections, NULL);
136
137    pa_assert_se(pa_shared_remove(p->core, "cli-protocol") >= 0);
138
139    pa_xfree(p);
140}
141