1/* $Id$ */ 2 3/*** 4 This file is part of avahi. 5 6 avahi is free software; you can redistribute it and/or modify it 7 under the terms of the GNU Lesser General Public License as 8 published by the Free Software Foundation; either version 2.1 of the 9 License, or (at your option) any later version. 10 11 avahi is distributed in the hope that it will be useful, but WITHOUT 12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General 14 Public License for more details. 15 16 You should have received a copy of the GNU Lesser General Public 17 License along with avahi; 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 <assert.h> 27#include <stdio.h> 28 29#include "malloc.h" 30#include "timeval.h" 31#include "dbus-watch-glue.h" 32 33static AvahiWatchEvent translate_dbus_to_avahi(unsigned int f) { 34 AvahiWatchEvent e = 0; 35 36 if (f & DBUS_WATCH_READABLE) 37 e |= AVAHI_WATCH_IN; 38 if (f & DBUS_WATCH_WRITABLE) 39 e |= AVAHI_WATCH_OUT; 40 if (f & DBUS_WATCH_ERROR) 41 e |= AVAHI_WATCH_ERR; 42 if (f & DBUS_WATCH_HANGUP) 43 e |= AVAHI_WATCH_HUP; 44 45 return e; 46} 47 48static unsigned int translate_avahi_to_dbus(AvahiWatchEvent e) { 49 unsigned int f = 0; 50 51 if (e & AVAHI_WATCH_IN) 52 f |= DBUS_WATCH_READABLE; 53 if (e & AVAHI_WATCH_OUT) 54 f |= DBUS_WATCH_WRITABLE; 55 if (e & AVAHI_WATCH_ERR) 56 f |= DBUS_WATCH_ERROR; 57 if (e & AVAHI_WATCH_HUP) 58 f |= DBUS_WATCH_HANGUP; 59 60 return f; 61} 62 63typedef struct { 64 DBusConnection *connection; 65 const AvahiPoll *poll_api; 66 AvahiTimeout *dispatch_timeout; 67 int ref; 68} ConnectionData; 69 70static ConnectionData *connection_data_ref(ConnectionData *d) { 71 assert(d); 72 assert(d->ref >= 1); 73 74 d->ref++; 75 return d; 76} 77 78static void connection_data_unref(ConnectionData *d) { 79 assert(d); 80 assert(d->ref >= 1); 81 82 if (--d->ref <= 0) { 83 d->poll_api->timeout_free(d->dispatch_timeout); 84 avahi_free(d); 85 } 86} 87 88static void request_dispatch(ConnectionData *d, int enable) { 89 static const struct timeval tv = { 0, 0 }; 90 assert(d); 91 92 if (enable) { 93 assert(dbus_connection_get_dispatch_status(d->connection) == DBUS_DISPATCH_DATA_REMAINS); 94 d->poll_api->timeout_update(d->dispatch_timeout, &tv); 95 } else 96 d->poll_api->timeout_update(d->dispatch_timeout, NULL); 97} 98 99static void dispatch_timeout_callback(AvahiTimeout *t, void *userdata) { 100 ConnectionData *d = userdata; 101 assert(t); 102 assert(d); 103 104 connection_data_ref(d); 105 dbus_connection_ref(d->connection); 106 107 if (dbus_connection_dispatch(d->connection) == DBUS_DISPATCH_DATA_REMAINS) 108 /* If there's still data, request that this handler is called again */ 109 request_dispatch(d, 1); 110 else 111 request_dispatch(d, 0); 112 113 dbus_connection_unref(d->connection); 114 connection_data_unref(d); 115} 116 117static void watch_callback(AvahiWatch *avahi_watch, AVAHI_GCC_UNUSED int fd, AvahiWatchEvent events, void *userdata) { 118 DBusWatch *dbus_watch = userdata; 119 120 assert(avahi_watch); 121 assert(dbus_watch); 122 123 dbus_watch_handle(dbus_watch, translate_avahi_to_dbus(events)); 124 /* Ignore the return value */ 125} 126 127static dbus_bool_t update_watch(const AvahiPoll *poll_api, DBusWatch *dbus_watch) { 128 AvahiWatch *avahi_watch; 129 dbus_bool_t b; 130 131 assert(dbus_watch); 132 133 avahi_watch = dbus_watch_get_data(dbus_watch); 134 135 b = dbus_watch_get_enabled(dbus_watch); 136 137 if (b && !avahi_watch) { 138 139 if (!(avahi_watch = poll_api->watch_new( 140 poll_api, 141#if (DBUS_VERSION_MAJOR == 1 && DBUS_VERSION_MINOR == 1 && DBUS_VERSION_MICRO >= 1) || (DBUS_VERSION_MAJOR == 1 && DBUS_VERSION_MINOR > 1) || (DBUS_VERSION_MAJOR > 1) 142 dbus_watch_get_unix_fd(dbus_watch), 143#else 144 dbus_watch_get_fd(dbus_watch), 145#endif 146 translate_dbus_to_avahi(dbus_watch_get_flags(dbus_watch)), 147 watch_callback, 148 dbus_watch))) 149 return FALSE; 150 151 dbus_watch_set_data(dbus_watch, avahi_watch, NULL); 152 153 } else if (!b && avahi_watch) { 154 155 poll_api->watch_free(avahi_watch); 156 dbus_watch_set_data(dbus_watch, NULL, NULL); 157 158 } else if (avahi_watch) { 159 160 /* Update flags */ 161 poll_api->watch_update(avahi_watch, dbus_watch_get_flags(dbus_watch)); 162 } 163 164 return TRUE; 165} 166 167static dbus_bool_t add_watch(DBusWatch *dbus_watch, void *userdata) { 168 ConnectionData *d = userdata; 169 170 assert(dbus_watch); 171 assert(d); 172 173 return update_watch(d->poll_api, dbus_watch); 174} 175 176static void remove_watch(DBusWatch *dbus_watch, void *userdata) { 177 ConnectionData *d = userdata; 178 AvahiWatch *avahi_watch; 179 180 assert(dbus_watch); 181 assert(d); 182 183 if ((avahi_watch = dbus_watch_get_data(dbus_watch))) { 184 d->poll_api->watch_free(avahi_watch); 185 dbus_watch_set_data(dbus_watch, NULL, NULL); 186 } 187} 188 189static void watch_toggled(DBusWatch *dbus_watch, void *userdata) { 190 ConnectionData *d = userdata; 191 192 assert(dbus_watch); 193 assert(d); 194 195 update_watch(d->poll_api, dbus_watch); 196} 197 198typedef struct TimeoutData { 199 const AvahiPoll *poll_api; 200 AvahiTimeout *avahi_timeout; 201 DBusTimeout *dbus_timeout; 202 int ref; 203} TimeoutData; 204 205static TimeoutData* timeout_data_ref(TimeoutData *t) { 206 assert(t); 207 assert(t->ref >= 1); 208 209 t->ref++; 210 return t; 211} 212 213static void timeout_data_unref(TimeoutData *t) { 214 assert(t); 215 assert(t->ref >= 1); 216 217 if (--t->ref <= 0) { 218 if (t->avahi_timeout) 219 t->poll_api->timeout_free(t->avahi_timeout); 220 221 avahi_free(t); 222 } 223} 224 225static void update_timeout(TimeoutData *timeout) { 226 assert(timeout); 227 assert(timeout->ref >= 1); 228 229 if (dbus_timeout_get_enabled(timeout->dbus_timeout)) { 230 struct timeval tv; 231 avahi_elapse_time(&tv, dbus_timeout_get_interval(timeout->dbus_timeout), 0); 232 timeout->poll_api->timeout_update(timeout-> 233 avahi_timeout, &tv); 234 } else 235 timeout->poll_api->timeout_update(timeout->avahi_timeout, NULL); 236 237} 238 239static void timeout_callback(AvahiTimeout *avahi_timeout, void *userdata) { 240 TimeoutData *timeout = userdata; 241 242 assert(avahi_timeout); 243 assert(timeout); 244 245 timeout_data_ref(timeout); 246 247 dbus_timeout_handle(timeout->dbus_timeout); 248 /* Ignore the return value */ 249 250 if (timeout->avahi_timeout) 251 update_timeout(timeout); 252 253 timeout_data_unref(timeout); 254} 255 256static dbus_bool_t add_timeout(DBusTimeout *dbus_timeout, void *userdata) { 257 TimeoutData *timeout; 258 ConnectionData *d = userdata; 259 struct timeval tv; 260 dbus_bool_t b; 261 262 assert(dbus_timeout); 263 assert(d); 264 265 if (!(timeout = avahi_new(TimeoutData, 1))) 266 return FALSE; 267 268 timeout->dbus_timeout = dbus_timeout; 269 timeout->poll_api = d->poll_api; 270 timeout->ref = 1; 271 272 if ((b = dbus_timeout_get_enabled(dbus_timeout))) 273 avahi_elapse_time(&tv, dbus_timeout_get_interval(dbus_timeout), 0); 274 275 if (!(timeout->avahi_timeout = d->poll_api->timeout_new( 276 d->poll_api, 277 b ? &tv : NULL, 278 timeout_callback, 279 timeout))) { 280 avahi_free(timeout); 281 return FALSE; 282 } 283 284 dbus_timeout_set_data(dbus_timeout, timeout, (DBusFreeFunction) timeout_data_unref); 285 return TRUE; 286} 287 288static void remove_timeout(DBusTimeout *dbus_timeout, void *userdata) { 289 ConnectionData *d = userdata; 290 TimeoutData *timeout; 291 292 assert(dbus_timeout); 293 assert(d); 294 295 timeout = dbus_timeout_get_data(dbus_timeout); 296 assert(timeout); 297 298 d->poll_api->timeout_free(timeout->avahi_timeout); 299 timeout->avahi_timeout = NULL; 300} 301 302static void timeout_toggled(DBusTimeout *dbus_timeout, AVAHI_GCC_UNUSED void *userdata) { 303 TimeoutData *timeout; 304 305 assert(dbus_timeout); 306 timeout = dbus_timeout_get_data(dbus_timeout); 307 assert(timeout); 308 309 update_timeout(timeout); 310} 311 312static void dispatch_status(AVAHI_GCC_UNUSED DBusConnection *connection, DBusDispatchStatus new_status, void *userdata) { 313 ConnectionData *d = userdata; 314 315 if (new_status == DBUS_DISPATCH_DATA_REMAINS) 316 request_dispatch(d, 1); 317 } 318 319int avahi_dbus_connection_glue(DBusConnection *c, const AvahiPoll *poll_api) { 320 ConnectionData *d = NULL; 321 322 assert(c); 323 assert(poll_api); 324 325 if (!(d = avahi_new(ConnectionData, 1))) 326 goto fail;; 327 328 d->poll_api = poll_api; 329 d->connection = c; 330 d->ref = 1; 331 332 if (!(d->dispatch_timeout = poll_api->timeout_new(poll_api, NULL, dispatch_timeout_callback, d))) 333 goto fail; 334 335 if (!(dbus_connection_set_watch_functions(c, add_watch, remove_watch, watch_toggled, connection_data_ref(d), (DBusFreeFunction)connection_data_unref))) 336 goto fail; 337 338 if (!(dbus_connection_set_timeout_functions(c, add_timeout, remove_timeout, timeout_toggled, connection_data_ref(d), (DBusFreeFunction)connection_data_unref))) 339 goto fail; 340 341 dbus_connection_set_dispatch_status_function(c, dispatch_status, connection_data_ref(d), (DBusFreeFunction)connection_data_unref); 342 343 if (dbus_connection_get_dispatch_status(c) == DBUS_DISPATCH_DATA_REMAINS) 344 request_dispatch(d, 1); 345 346 connection_data_unref(d); 347 348 return 0; 349 350fail: 351 352 if (d) { 353 d->poll_api->timeout_free(d->dispatch_timeout); 354 355 avahi_free(d); 356 } 357 358 return -1; 359} 360