code.delx.au - pulseaudio/blob - src/modules/module-x11-publish.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio 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   polypaudio 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 polypaudio; 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 <stdio.h>
  27 #include <assert.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <unistd.h>
  31
  32 #include <X11/Xlib.h>
  33 #include <X11/Xatom.h>
  34
  35 #include <polyp/xmalloc.h>
  36
  37 #include <polypcore/module.h>
  38 #include <polypcore/sink.h>
  39 #include <polypcore/core-scache.h>
  40 #include <polypcore/modargs.h>
  41 #include <polypcore/namereg.h>
  42 #include <polypcore/log.h>
  43 #include <polypcore/x11wrap.h>
  44 #include <polypcore/core-util.h>
  45 #include <polypcore/native-common.h>
  46 #include <polypcore/authkey-prop.h>
  47 #include <polypcore/authkey.h>
  48 #include <polypcore/x11prop.h>
  49 #include <polypcore/strlist.h>
  50 #include <polypcore/props.h>
  51
  52 #include "module-x11-publish-symdef.h"
  53
  54 PA_MODULE_AUTHOR("Lennart Poettering")
  55 PA_MODULE_DESCRIPTION("X11 Credential Publisher")
  56 PA_MODULE_VERSION(PACKAGE_VERSION)
  57 PA_MODULE_USAGE("display=<X11 display>")
  58
  59 static const char* const valid_modargs[] = {
  60     "display",
  61     "sink",
  62     "source",
  63     "cookie",
  64     NULL
  65 };
  66
  67 struct userdata {
  68     pa_core *core;
  69     pa_x11_wrapper *x11_wrapper;
  70     char *id;
  71     uint8_t auth_cookie[PA_NATIVE_COOKIE_LENGTH];
  72     int auth_cookie_in_property;
  73 };
  74
  75 static int load_key(struct userdata *u, const char*fn) {
  76     assert(u);
  77
  78     u->auth_cookie_in_property = 0;
  79
  80     if (!fn && pa_authkey_prop_get(u->core, PA_NATIVE_COOKIE_PROPERTY_NAME, u->auth_cookie, sizeof(u->auth_cookie)) >= 0) {
  81         pa_log_debug(__FILE__": using already loaded auth cookie.");
  82         pa_authkey_prop_ref(u->core, PA_NATIVE_COOKIE_PROPERTY_NAME);
  83         u->auth_cookie_in_property = 1;
  84         return 0;
  85     }
  86
  87     if (!fn)
  88         fn = PA_NATIVE_COOKIE_FILE;
  89
  90     if (pa_authkey_load_auto(fn, u->auth_cookie, sizeof(u->auth_cookie)) < 0)
  91         return -1;
  92
  93     pa_log_debug(__FILE__": loading cookie from disk.");
  94
  95     if (pa_authkey_prop_put(u->core, PA_NATIVE_COOKIE_PROPERTY_NAME, u->auth_cookie, sizeof(u->auth_cookie)) >= 0)
  96         u->auth_cookie_in_property = 1;
  97
  98     return 0;
  99 }
 100
 101 int pa__init(pa_core *c, pa_module*m) {
 102     struct userdata *u;
 103     pa_modargs *ma = NULL;
 104     char hn[256], un[128];
 105     char hx[PA_NATIVE_COOKIE_LENGTH*2+1];
 106     const char *t;
 107     char *s;
 108     pa_strlist *l;
 109
 110     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 111         pa_log(__FILE__": failed to parse module arguments");
 112         goto fail;
 113     }
 114
 115     m->userdata = u = pa_xmalloc(sizeof(struct userdata));
 116     u->core = c;
 117     u->id = NULL;
 118     u->auth_cookie_in_property = 0;
 119
 120     if (load_key(u, pa_modargs_get_value(ma, "cookie", NULL)) < 0)
 121         goto fail;
 122
 123     if (!(u->x11_wrapper = pa_x11_wrapper_get(c, pa_modargs_get_value(ma, "display", NULL))))
 124         goto fail;
 125
 126     if (!(l = pa_property_get(c, PA_NATIVE_SERVER_PROPERTY_NAME)))
 127         goto fail;
 128
 129     s = pa_strlist_tostring(l);
 130     pa_x11_set_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "POLYP_SERVER", s);
 131     pa_xfree(s);
 132
 133     if (!pa_get_fqdn(hn, sizeof(hn)) || !pa_get_user_name(un, sizeof(un)))
 134         goto fail;
 135
 136     u->id = pa_sprintf_malloc("%s@%s/%u", un, hn, (unsigned) getpid());
 137     pa_x11_set_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "POLYP_ID", u->id);
 138
 139     if ((t = pa_modargs_get_value(ma, "source", NULL)))
 140         pa_x11_set_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "POLYP_SOURCE", t);
 141
 142     if ((t = pa_modargs_get_value(ma, "sink", NULL)))
 143         pa_x11_set_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "POLYP_SINK", t);
 144
 145     pa_x11_set_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "POLYP_COOKIE", pa_hexstr(u->auth_cookie, sizeof(u->auth_cookie), hx, sizeof(hx)));
 146
 147     pa_modargs_free(ma);
 148     return 0;
 149
 150 fail:
 151     if (ma)
 152         pa_modargs_free(ma);
 153
 154     pa__done(c, m);
 155     return -1;
 156 }
 157
 158 void pa__done(pa_core *c, pa_module*m) {
 159     struct userdata*u;
 160     assert(c && m);
 161
 162     if (!(u = m->userdata))
 163         return;
 164
 165     if (u->x11_wrapper) {
 166         char t[256];
 167
 168         /* Yes, here is a race condition */
 169         if (!pa_x11_get_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "POLYP_ID", t, sizeof(t)) || strcmp(t, u->id))
 170             pa_log_warn(__FILE__": Polypaudio information vanished from X11!");
 171         else {
 172             pa_x11_del_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "POLYP_ID");
 173             pa_x11_del_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "POLYP_SERVER");
 174             pa_x11_del_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "POLYP_SINK");
 175             pa_x11_del_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "POLYP_SOURCE");
 176             pa_x11_del_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "POLYP_COOKIE");
 177             XSync(pa_x11_wrapper_get_display(u->x11_wrapper), False);
 178         }
 179     }
 180
 181     if (u->x11_wrapper)
 182         pa_x11_wrapper_unref(u->x11_wrapper);
 183
 184     if (u->auth_cookie_in_property)
 185         pa_authkey_prop_unref(c, PA_NATIVE_COOKIE_PROPERTY_NAME);
 186
 187     pa_xfree(u->id);
 188     pa_xfree(u);
 189 }
 190