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00035 #include "asterisk.h"
00036 #include "asterisk/datastore.h"
00037 #include "asterisk/channel.h"
00038 #include "asterisk/logger.h"
00039 #include "asterisk/audiohook.h"
00040 #include "asterisk/pbx.h"
00041 #include "asterisk/module.h"
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00095 struct inheritable_audiohook {
00096 AST_LIST_ENTRY(inheritable_audiohook) list;
00097 char source[1];
00098 };
00099
00100 struct audiohook_inheritance_datastore {
00101 AST_LIST_HEAD (, inheritable_audiohook) allowed_list;
00102 };
00103
00104 static void audiohook_inheritance_fixup(void *data, struct ast_channel *old_chan, struct ast_channel *new_chan);
00105 static void audiohook_inheritance_destroy (void *data);
00106 static const struct ast_datastore_info audiohook_inheritance_info = {
00107 .type = "audiohook inheritance",
00108 .destroy = audiohook_inheritance_destroy,
00109 .chan_fixup = audiohook_inheritance_fixup,
00110 };
00111
00112
00113
00114
00115
00116
00117
00118
00119
00120
00121 static void audiohook_inheritance_fixup(void *data, struct ast_channel *old_chan, struct ast_channel *new_chan)
00122 {
00123 struct inheritable_audiohook *audiohook = NULL;
00124 struct audiohook_inheritance_datastore *datastore = data;
00125
00126 ast_debug(2, "inheritance fixup occurring for channels %s(%p) and %s(%p)", old_chan->name, old_chan, new_chan->name, new_chan);
00127
00128 AST_LIST_TRAVERSE(&datastore->allowed_list, audiohook, list) {
00129 ast_audiohook_move_by_source(old_chan, new_chan, audiohook->source);
00130 ast_debug(3, "Moved audiohook %s from %s(%p) to %s(%p)\n",
00131 audiohook->source, old_chan->name, old_chan, new_chan->name, new_chan);
00132 }
00133 return;
00134 }
00135
00136
00137
00138
00139
00140
00141 static void audiohook_inheritance_destroy(void *data)
00142 {
00143 struct audiohook_inheritance_datastore *audiohook_inheritance_datastore = data;
00144 struct inheritable_audiohook *inheritable_audiohook = NULL;
00145
00146 while ((inheritable_audiohook = AST_LIST_REMOVE_HEAD(&audiohook_inheritance_datastore->allowed_list, list))) {
00147 ast_free(inheritable_audiohook);
00148 }
00149
00150 ast_free(audiohook_inheritance_datastore);
00151 }
00152
00153
00154
00155
00156
00157
00158 static struct audiohook_inheritance_datastore *setup_inheritance_datastore(struct ast_channel *chan)
00159 {
00160 struct ast_datastore *datastore = NULL;
00161 struct audiohook_inheritance_datastore *audiohook_inheritance_datastore = NULL;
00162
00163 if (!(datastore = ast_datastore_alloc(&audiohook_inheritance_info, NULL))) {
00164 return NULL;
00165 }
00166
00167 if (!(audiohook_inheritance_datastore = ast_calloc(1, sizeof(*audiohook_inheritance_datastore)))) {
00168 ast_datastore_free(datastore);
00169 return NULL;
00170 }
00171
00172 datastore->data = audiohook_inheritance_datastore;
00173 ast_channel_lock(chan);
00174 ast_channel_datastore_add(chan, datastore);
00175 ast_channel_unlock(chan);
00176 return audiohook_inheritance_datastore;
00177 }
00178
00179
00180
00181
00182
00183
00184
00185
00186 static int setup_inheritable_audiohook(struct audiohook_inheritance_datastore *audiohook_inheritance_datastore, const char *source)
00187 {
00188 struct inheritable_audiohook *inheritable_audiohook = NULL;
00189
00190 inheritable_audiohook = ast_calloc(1, sizeof(*inheritable_audiohook) + strlen(source));
00191
00192 if (!inheritable_audiohook) {
00193 return -1;
00194 }
00195
00196 strcpy(inheritable_audiohook->source, source);
00197 AST_LIST_INSERT_TAIL(&audiohook_inheritance_datastore->allowed_list, inheritable_audiohook, list);
00198 ast_debug(3, "Set audiohook %s to be inheritable\n", source);
00199 return 0;
00200 }
00201
00202
00203
00204
00205
00206
00207
00208
00209
00210
00211 static int func_inheritance_write(struct ast_channel *chan, const char *function, char *data, const char *value)
00212 {
00213 int allow;
00214 struct ast_datastore *datastore = NULL;
00215 struct audiohook_inheritance_datastore *inheritance_datastore = NULL;
00216 struct inheritable_audiohook *inheritable_audiohook;
00217
00218
00219 if (ast_strlen_zero(data)) {
00220 ast_log(LOG_WARNING, "No argument provided to INHERITANCE function.\n");
00221 return -1;
00222 }
00223
00224 if (ast_strlen_zero(value)) {
00225 ast_log(LOG_WARNING, "No value provided to INHERITANCE function.\n");
00226 return -1;
00227 }
00228
00229 allow = ast_true(value);
00230
00231
00232 ast_channel_lock(chan);
00233 if (!(datastore = ast_channel_datastore_find(chan, &audiohook_inheritance_info, NULL))) {
00234 ast_channel_unlock(chan);
00235
00236 if (!allow) {
00237 ast_debug(1, "Audiohook %s is already set to not be inheritable on channel %s\n", data, chan->name);
00238 return 0;
00239 } else if (!(inheritance_datastore = setup_inheritance_datastore(chan))) {
00240 ast_log(LOG_WARNING, "Unable to set up audiohook inheritance datastore on channel %s\n", chan->name);
00241 return -1;
00242 } else {
00243 return setup_inheritable_audiohook(inheritance_datastore, data);
00244 }
00245 } else {
00246 inheritance_datastore = datastore->data;
00247 }
00248 ast_channel_unlock(chan);
00249
00250
00251
00252 AST_LIST_TRAVERSE_SAFE_BEGIN(&inheritance_datastore->allowed_list, inheritable_audiohook, list) {
00253 if (!strcasecmp(inheritable_audiohook->source, data)) {
00254 if (allow) {
00255 ast_debug(2, "Audiohook source %s is already set up to be inherited from channel %s\n", data, chan->name);
00256 return 0;
00257 } else {
00258 ast_debug(2, "Removing inheritability of audiohook %s from channel %s\n", data, chan->name);
00259 AST_LIST_REMOVE_CURRENT(list);
00260 ast_free(inheritable_audiohook);
00261 return 0;
00262 }
00263 }
00264 }
00265 AST_LIST_TRAVERSE_SAFE_END;
00266
00267
00268
00269
00270
00271
00272
00273 if (allow) {
00274 return setup_inheritable_audiohook(inheritance_datastore, data);
00275 } else {
00276 ast_debug(1, "Audiohook %s is already set to not be inheritable on channel %s\n", data, chan->name);
00277 return 0;
00278 }
00279 }
00280
00281 static struct ast_custom_function inheritance_function = {
00282 .name = "AUDIOHOOK_INHERIT",
00283 .write = func_inheritance_write,
00284 };
00285
00286 static int unload_module(void)
00287 {
00288 return ast_custom_function_unregister(&inheritance_function);
00289 }
00290
00291 static int load_module(void)
00292 {
00293 if (ast_custom_function_register(&inheritance_function)) {
00294 return AST_MODULE_LOAD_DECLINE;
00295 } else {
00296 return AST_MODULE_LOAD_SUCCESS;
00297 }
00298 }
00299 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Audiohook inheritance function");