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00031 #include "asterisk.h"
00032 #include "asterisk/datastore.h"
00033 #include "asterisk/channel.h"
00034 #include "asterisk/logger.h"
00035 #include "asterisk/audiohook.h"
00036 #include "asterisk/pbx.h"
00037 #include "asterisk/module.h"
00038
00039 struct inheritable_audiohook {
00040 AST_LIST_ENTRY(inheritable_audiohook) list;
00041 char source[1];
00042 };
00043
00044 struct audiohook_inheritance_datastore {
00045 AST_LIST_HEAD (, inheritable_audiohook) allowed_list;
00046 };
00047
00048 static void audiohook_inheritance_fixup(void *data, struct ast_channel *old_chan, struct ast_channel *new_chan);
00049 static void audiohook_inheritance_destroy (void *data);
00050 static const struct ast_datastore_info audiohook_inheritance_info = {
00051 .type = "audiohook inheritance",
00052 .destroy = audiohook_inheritance_destroy,
00053 .chan_fixup = audiohook_inheritance_fixup,
00054 };
00055
00056
00057
00058
00059
00060
00061
00062
00063
00064
00065 static void audiohook_inheritance_fixup(void *data, struct ast_channel *old_chan, struct ast_channel *new_chan)
00066 {
00067 struct inheritable_audiohook *audiohook = NULL;
00068 struct audiohook_inheritance_datastore *datastore = data;
00069
00070 ast_debug(2, "inheritance fixup occurring for channels %s(%p) and %s(%p)", old_chan->name, old_chan, new_chan->name, new_chan);
00071
00072 AST_LIST_TRAVERSE(&datastore->allowed_list, audiohook, list) {
00073 ast_audiohook_move_by_source(old_chan, new_chan, audiohook->source);
00074 ast_debug(3, "Moved audiohook %s from %s(%p) to %s(%p)\n",
00075 audiohook->source, old_chan->name, old_chan, new_chan->name, new_chan);
00076 }
00077 return;
00078 }
00079
00080
00081
00082
00083
00084
00085 static void audiohook_inheritance_destroy(void *data)
00086 {
00087 struct audiohook_inheritance_datastore *audiohook_inheritance_datastore = data;
00088 struct inheritable_audiohook *inheritable_audiohook = NULL;
00089
00090 while ((inheritable_audiohook = AST_LIST_REMOVE_HEAD(&audiohook_inheritance_datastore->allowed_list, list))) {
00091 ast_free(inheritable_audiohook);
00092 }
00093 }
00094
00095
00096
00097
00098
00099
00100 static struct audiohook_inheritance_datastore *setup_inheritance_datastore(struct ast_channel *chan)
00101 {
00102 struct ast_datastore *datastore = NULL;
00103 struct audiohook_inheritance_datastore *audiohook_inheritance_datastore = NULL;
00104
00105 if (!(datastore = ast_datastore_alloc(&audiohook_inheritance_info, NULL))) {
00106 return NULL;
00107 }
00108
00109 if (!(audiohook_inheritance_datastore = ast_calloc(1, sizeof(*audiohook_inheritance_datastore)))) {
00110 ast_datastore_free(datastore);
00111 return NULL;
00112 }
00113
00114 datastore->data = audiohook_inheritance_datastore;
00115 ast_channel_lock(chan);
00116 ast_channel_datastore_add(chan, datastore);
00117 ast_channel_unlock(chan);
00118 return audiohook_inheritance_datastore;
00119 }
00120
00121
00122
00123
00124
00125
00126
00127
00128 static int setup_inheritable_audiohook(struct audiohook_inheritance_datastore *audiohook_inheritance_datastore, const char *source)
00129 {
00130 struct inheritable_audiohook *inheritable_audiohook = NULL;
00131
00132 inheritable_audiohook = ast_calloc(1, sizeof(*inheritable_audiohook) + strlen(source));
00133
00134 if (!inheritable_audiohook) {
00135 return -1;
00136 }
00137
00138 strcpy(inheritable_audiohook->source, source);
00139 AST_LIST_INSERT_TAIL(&audiohook_inheritance_datastore->allowed_list, inheritable_audiohook, list);
00140 ast_debug(3, "Set audiohook %s to be inheritable\n", source);
00141 return 0;
00142 }
00143
00144
00145
00146
00147
00148
00149
00150
00151
00152
00153 static int func_inheritance_write(struct ast_channel *chan, const char *function, char *data, const char *value)
00154 {
00155 int allow;
00156 struct ast_datastore *datastore = NULL;
00157 struct audiohook_inheritance_datastore *inheritance_datastore = NULL;
00158 struct inheritable_audiohook *inheritable_audiohook;
00159
00160
00161 if (ast_strlen_zero(data)) {
00162 ast_log(LOG_WARNING, "No argument provided to INHERITANCE function.\n");
00163 return -1;
00164 }
00165
00166 if (ast_strlen_zero(value)) {
00167 ast_log(LOG_WARNING, "No value provided to INHERITANCE function.\n");
00168 return -1;
00169 }
00170
00171 allow = ast_true(value);
00172
00173
00174 ast_channel_lock(chan);
00175 if (!(datastore = ast_channel_datastore_find(chan, &audiohook_inheritance_info, NULL))) {
00176 ast_channel_unlock(chan);
00177
00178 if (!allow) {
00179 ast_debug(1, "Audiohook %s is already set to not be inheritable on channel %s\n", data, chan->name);
00180 return 0;
00181 } else if (!(inheritance_datastore = setup_inheritance_datastore(chan))) {
00182 ast_log(LOG_WARNING, "Unable to set up audiohook inheritance datastore on channel %s\n", chan->name);
00183 return -1;
00184 } else {
00185 return setup_inheritable_audiohook(inheritance_datastore, data);
00186 }
00187 } else {
00188 inheritance_datastore = datastore->data;
00189 }
00190 ast_channel_unlock(chan);
00191
00192
00193
00194 AST_LIST_TRAVERSE_SAFE_BEGIN(&inheritance_datastore->allowed_list, inheritable_audiohook, list) {
00195 if (!strcasecmp(inheritable_audiohook->source, data)) {
00196 if (allow) {
00197 ast_debug(2, "Audiohook source %s is already set up to be inherited from channel %s\n", data, chan->name);
00198 return 0;
00199 } else {
00200 ast_debug(2, "Removing inheritability of audiohook %s from channel %s\n", data, chan->name);
00201 AST_LIST_REMOVE_CURRENT(list);
00202 ast_free(inheritable_audiohook);
00203 return 0;
00204 }
00205 }
00206 }
00207 AST_LIST_TRAVERSE_SAFE_END;
00208
00209
00210
00211
00212
00213
00214
00215 if (allow) {
00216 return setup_inheritable_audiohook(inheritance_datastore, data);
00217 } else {
00218 ast_debug(1, "Audiohook %s is already set to not be inheritable on channel %s\n", data, chan->name);
00219 return 0;
00220 }
00221 }
00222
00223 static struct ast_custom_function inheritance_function = {
00224 .name = "AUDIOHOOK_INHERIT",
00225 .synopsis = "Set whether an audiohook may be inherited to another channel",
00226 .syntax = "AUDIOHOOK_INHERIT(source)",
00227 .desc =
00228 "By enabling audiohook inheritance on the channel, you are giving\n"
00229 "permission for an audiohook to be inherited by a descendent channel.\n"
00230 "Inheritance may be be disabled at any point as well.\n"
00231 "\n"
00232 " Example scenario:\n"
00233 " exten => 2000,1,MixMonitor(blah.wav)\n"
00234 " exten => 2000,n,Set(AUDIOHOOK_INHERIT(MixMonitor)=yes)\n"
00235 " exten => 2000,n,Dial(SIP/2000)\n"
00236 "\n"
00237 " exten => 4000,1,Dial(SIP/4000)\n"
00238 "\n"
00239 " exten => 5000,1,MixMonitor(blah2.wav)\n"
00240 " exten => 5000,n,Dial(SIP/5000)\n"
00241 "\n"
00242 " In this basic dialplan scenario, let's consider the following sample calls\n"
00243 " Call 1: Caller dials 2000. The person who answers then executes an attended\n"
00244 " transfer to 4000.\n"
00245 " Result: Since extension 2000 set MixMonitor to be inheritable, after the\n"
00246 " transfer to 400 has completed, the call will continue to be recorded\n"
00247 " to blah.wav\n"
00248 "\n"
00249 " Call 2: Caller dials 5000. The person who answers then executes an attended\n"
00250 " transfer to 4000.\n"
00251 " Result: Since extension 5000 did not set MixMonitor to be inheritable, the\n"
00252 " recording will stop once the call has been transferred to 4000.\n",
00253 .write = func_inheritance_write,
00254 };
00255
00256 static int unload_module(void)
00257 {
00258 return ast_custom_function_unregister(&inheritance_function);
00259 }
00260
00261 static int load_module(void)
00262 {
00263 if (ast_custom_function_register(&inheritance_function)) {
00264 return AST_MODULE_LOAD_DECLINE;
00265 } else {
00266 return AST_MODULE_LOAD_SUCCESS;
00267 }
00268 }
00269 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Audiohook inheritance function");