src/pulsecore/auth-cookie.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2008 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, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <sys/types.h>
  27
  28 #include <pulse/xmalloc.h>
  29
  30 #include <pulsecore/refcnt.h>
  31 #include <pulsecore/macro.h>
  32 #include <pulsecore/core-util.h>
  33 #include <pulsecore/shared.h>
  34 #include <pulsecore/authkey.h>
  35
  36 #include "auth-cookie.h"
  37
  38 struct pa_auth_cookie {
  39     PA_REFCNT_DECLARE;
  40     pa_core *core;
  41     char *name;
  42     size_t size;
  43 };
  44
  45 pa_auth_cookie* pa_auth_cookie_get(pa_core *core, const char *cn, size_t size) {
  46     pa_auth_cookie *c;
  47     char *t;
  48
  49     pa_assert(core);
  50     pa_assert(size > 0);
  51
  52     t = pa_sprintf_malloc("auth-cookie%s%s", cn ? "@" : "", cn ? cn : "");
  53
  54     if ((c = pa_shared_get(core, t))) {
  55
  56         pa_xfree(t);
  57
  58         if (c->size != size)
  59             return NULL;
  60
  61         return pa_auth_cookie_ref(c);
  62     }
  63
  64     c = pa_xmalloc(PA_ALIGN(sizeof(pa_auth_cookie)) + size);
  65     PA_REFCNT_INIT(c);
  66     c->core = core;
  67     c->name = t;
  68     c->size = size;
  69
  70     pa_assert_se(pa_shared_set(core, t, c) >= 0);
  71
  72     if (pa_authkey_load_auto(cn, (uint8_t*) c + PA_ALIGN(sizeof(pa_auth_cookie)), size) < 0) {
  73         pa_auth_cookie_unref(c);
  74         return NULL;
  75     }
  76
  77     return c;
  78 }
  79
  80 pa_auth_cookie* pa_auth_cookie_ref(pa_auth_cookie *c) {
  81     pa_assert(c);
  82     pa_assert(PA_REFCNT_VALUE(c) >= 1);
  83
  84     PA_REFCNT_INC(c);
  85
  86     return c;
  87 }
  88
  89 void pa_auth_cookie_unref(pa_auth_cookie *c) {
  90     pa_assert(c);
  91     pa_assert(PA_REFCNT_VALUE(c) >= 1);
  92
  93     if (PA_REFCNT_DEC(c) > 0)
  94         return;
  95
  96     pa_assert_se(pa_shared_remove(c->core, c->name) >= 0);
  97
  98     pa_xfree(c->name);
  99     pa_xfree(c);
 100 }
 101
 102 const uint8_t* pa_auth_cookie_read(pa_auth_cookie *c, size_t size) {
 103     pa_assert(c);
 104     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 105     pa_assert(c->size == size);
 106
 107     return (const uint8_t*) c + PA_ALIGN(sizeof(pa_auth_cookie));
 108 }