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 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 #include <pulse/util.h>
  30
  31 #include <pulsecore/refcnt.h>
  32 #include <pulsecore/macro.h>
  33 #include <pulsecore/core-util.h>
  34 #include <pulsecore/shared.h>
  35 #include <pulsecore/authkey.h>
  36
  37 #include "auth-cookie.h"
  38
  39 struct pa_auth_cookie {
  40     PA_REFCNT_DECLARE;
  41     pa_core *core;
  42     char *name;
  43     size_t size;
  44 };
  45
  46 pa_auth_cookie* pa_auth_cookie_get(pa_core *core, const char *cn, size_t size) {
  47     pa_auth_cookie *c;
  48     char *t;
  49
  50     pa_assert(core);
  51     pa_assert(size > 0);
  52
  53     t = pa_sprintf_malloc("auth-cookie%s%s", cn ? "@" : "", cn ? cn : "");
  54
  55     if ((c = pa_shared_get(core, t))) {
  56
  57         pa_xfree(t);
  58
  59         if (c->size != size)
  60             return NULL;
  61
  62         return pa_auth_cookie_ref(c);
  63     }
  64
  65     c = pa_xmalloc(PA_ALIGN(sizeof(pa_auth_cookie)) + size);
  66     PA_REFCNT_INIT(c);
  67     c->core = core;
  68     c->name = t;
  69     c->size = size;
  70
  71     pa_assert_se(pa_shared_set(core, t, c) >= 0);
  72
  73     if (pa_authkey_load_auto(cn, (uint8_t*) c + PA_ALIGN(sizeof(pa_auth_cookie)), size) < 0) {
  74         pa_auth_cookie_unref(c);
  75         return NULL;
  76     }
  77
  78     return c;
  79 }
  80
  81 pa_auth_cookie* pa_auth_cookie_ref(pa_auth_cookie *c) {
  82     pa_assert(c);
  83     pa_assert(PA_REFCNT_VALUE(c) >= 1);
  84
  85     PA_REFCNT_INC(c);
  86
  87     return c;
  88 }
  89
  90 void pa_auth_cookie_unref(pa_auth_cookie *c) {
  91     pa_assert(c);
  92     pa_assert(PA_REFCNT_VALUE(c) >= 1);
  93
  94     if (PA_REFCNT_DEC(c) > 0)
  95         return;
  96
  97     pa_assert_se(pa_shared_remove(c->core, c->name) >= 0);
  98
  99     pa_xfree(c->name);
 100     pa_xfree(c);
 101 }
 102
 103 const uint8_t* pa_auth_cookie_read(pa_auth_cookie *c, size_t size) {
 104     pa_assert(c);
 105     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 106     pa_assert(c->size == size);
 107
 108     return (const uint8_t*) c + PA_ALIGN(sizeof(pa_auth_cookie));
 109 }