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00028 #include "asterisk.h"
00029
00030 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 223489 $")
00031
00032 #include <sys/time.h>
00033 #include <signal.h>
00034
00035 #include "asterisk/_private.h"
00036
00037 #include "asterisk/pbx.h"
00038 #include "asterisk/frame.h"
00039 #include "asterisk/sched.h"
00040 #include "asterisk/channel.h"
00041 #include "asterisk/file.h"
00042 #include "asterisk/translate.h"
00043 #include "asterisk/manager.h"
00044 #include "asterisk/chanvars.h"
00045 #include "asterisk/linkedlists.h"
00046 #include "asterisk/indications.h"
00047 #include "asterisk/lock.h"
00048 #include "asterisk/utils.h"
00049
00050 #define MAX_AUTOMONS 1500
00051
00052 struct asent {
00053 struct ast_channel *chan;
00054
00055
00056
00057 unsigned int use_count;
00058 unsigned int orig_end_dtmf_flag:1;
00059
00060
00061
00062 AST_LIST_HEAD_NOLOCK(, ast_frame) deferred_frames;
00063 AST_LIST_ENTRY(asent) list;
00064 };
00065
00066 static AST_LIST_HEAD_STATIC(aslist, asent);
00067 static ast_cond_t as_cond;
00068
00069 static pthread_t asthread = AST_PTHREADT_NULL;
00070
00071 static int as_chan_list_state;
00072
00073 static void *autoservice_run(void *ign)
00074 {
00075 struct ast_frame hangup_frame = {
00076 .frametype = AST_FRAME_CONTROL,
00077 .subclass = AST_CONTROL_HANGUP,
00078 };
00079
00080 for (;;) {
00081 struct ast_channel *mons[MAX_AUTOMONS];
00082 struct asent *ents[MAX_AUTOMONS];
00083 struct ast_channel *chan;
00084 struct asent *as;
00085 int i, x = 0, ms = 50;
00086 struct ast_frame *f = NULL;
00087 struct ast_frame *defer_frame = NULL;
00088
00089 AST_LIST_LOCK(&aslist);
00090
00091
00092
00093 as_chan_list_state++;
00094
00095 if (AST_LIST_EMPTY(&aslist)) {
00096 ast_cond_wait(&as_cond, &aslist.lock);
00097 }
00098
00099 AST_LIST_TRAVERSE(&aslist, as, list) {
00100 if (!ast_check_hangup(as->chan)) {
00101 if (x < MAX_AUTOMONS) {
00102 ents[x] = as;
00103 mons[x++] = as->chan;
00104 } else {
00105 ast_log(LOG_WARNING, "Exceeded maximum number of automatic monitoring events. Fix autoservice.c\n");
00106 }
00107 }
00108 }
00109
00110 AST_LIST_UNLOCK(&aslist);
00111
00112 if (!x) {
00113 continue;
00114 }
00115
00116 chan = ast_waitfor_n(mons, x, &ms);
00117 if (!chan) {
00118 continue;
00119 }
00120
00121 f = ast_read(chan);
00122
00123 if (!f) {
00124
00125
00126
00127
00128
00129
00130 defer_frame = &hangup_frame;
00131 } else {
00132
00133
00134
00135
00136
00137 switch (f->frametype) {
00138
00139 case AST_FRAME_DTMF_END:
00140 case AST_FRAME_CONTROL:
00141 case AST_FRAME_TEXT:
00142 case AST_FRAME_IMAGE:
00143 case AST_FRAME_HTML:
00144 defer_frame = f;
00145 break;
00146
00147
00148 case AST_FRAME_DTMF_BEGIN:
00149 case AST_FRAME_VOICE:
00150 case AST_FRAME_VIDEO:
00151 case AST_FRAME_NULL:
00152 case AST_FRAME_IAX:
00153 case AST_FRAME_CNG:
00154 case AST_FRAME_MODEM:
00155 break;
00156 }
00157 }
00158
00159 if (defer_frame) {
00160 for (i = 0; i < x; i++) {
00161 struct ast_frame *dup_f;
00162
00163 if (mons[i] != chan) {
00164 continue;
00165 }
00166
00167 if (defer_frame != f) {
00168 if ((dup_f = ast_frdup(defer_frame))) {
00169 AST_LIST_INSERT_HEAD(&ents[i]->deferred_frames, dup_f, frame_list);
00170 }
00171 } else {
00172 if ((dup_f = ast_frisolate(defer_frame))) {
00173 if (dup_f != defer_frame) {
00174 ast_frfree(defer_frame);
00175 }
00176 AST_LIST_INSERT_HEAD(&ents[i]->deferred_frames, dup_f, frame_list);
00177 }
00178 }
00179
00180 break;
00181 }
00182 } else if (f) {
00183 ast_frfree(f);
00184 }
00185 }
00186
00187 asthread = AST_PTHREADT_NULL;
00188
00189 return NULL;
00190 }
00191
00192 int ast_autoservice_start(struct ast_channel *chan)
00193 {
00194 int res = 0;
00195 struct asent *as;
00196
00197 AST_LIST_LOCK(&aslist);
00198 AST_LIST_TRAVERSE(&aslist, as, list) {
00199 if (as->chan == chan) {
00200 as->use_count++;
00201 break;
00202 }
00203 }
00204 AST_LIST_UNLOCK(&aslist);
00205
00206 if (as) {
00207
00208 return 0;
00209 }
00210
00211 if (!(as = ast_calloc(1, sizeof(*as))))
00212 return -1;
00213
00214
00215 as->chan = chan;
00216 as->use_count = 1;
00217
00218 ast_channel_lock(chan);
00219 as->orig_end_dtmf_flag = ast_test_flag(chan, AST_FLAG_END_DTMF_ONLY) ? 1 : 0;
00220 if (!as->orig_end_dtmf_flag)
00221 ast_set_flag(chan, AST_FLAG_END_DTMF_ONLY);
00222 ast_channel_unlock(chan);
00223
00224 AST_LIST_LOCK(&aslist);
00225
00226 if (AST_LIST_EMPTY(&aslist) && asthread != AST_PTHREADT_NULL) {
00227 ast_cond_signal(&as_cond);
00228 }
00229
00230 AST_LIST_INSERT_HEAD(&aslist, as, list);
00231
00232 if (asthread == AST_PTHREADT_NULL) {
00233 if (ast_pthread_create_background(&asthread, NULL, autoservice_run, NULL)) {
00234 ast_log(LOG_WARNING, "Unable to create autoservice thread :(\n");
00235
00236
00237 AST_LIST_REMOVE(&aslist, as, list);
00238 free(as);
00239 asthread = AST_PTHREADT_NULL;
00240 res = -1;
00241 } else {
00242 pthread_kill(asthread, SIGURG);
00243 }
00244 }
00245
00246 AST_LIST_UNLOCK(&aslist);
00247
00248 return res;
00249 }
00250
00251 int ast_autoservice_stop(struct ast_channel *chan)
00252 {
00253 int res = -1;
00254 struct asent *as, *removed = NULL;
00255 struct ast_frame *f;
00256 int chan_list_state;
00257
00258 AST_LIST_LOCK(&aslist);
00259
00260
00261
00262
00263
00264 chan_list_state = as_chan_list_state;
00265
00266
00267
00268 AST_LIST_TRAVERSE_SAFE_BEGIN(&aslist, as, list) {
00269 if (as->chan == chan) {
00270 as->use_count--;
00271 if (as->use_count < 1) {
00272 AST_LIST_REMOVE_CURRENT(list);
00273 removed = as;
00274 }
00275 break;
00276 }
00277 }
00278 AST_LIST_TRAVERSE_SAFE_END;
00279
00280 if (removed && asthread != AST_PTHREADT_NULL) {
00281 pthread_kill(asthread, SIGURG);
00282 }
00283
00284 AST_LIST_UNLOCK(&aslist);
00285
00286 if (!removed) {
00287 return 0;
00288 }
00289
00290
00291 while (chan_list_state == as_chan_list_state) {
00292 usleep(1000);
00293 }
00294
00295
00296
00297
00298 if (!chan->_softhangup) {
00299 res = 0;
00300 }
00301
00302 if (!as->orig_end_dtmf_flag) {
00303 ast_clear_flag(chan, AST_FLAG_END_DTMF_ONLY);
00304 }
00305
00306 ast_channel_lock(chan);
00307 while ((f = AST_LIST_REMOVE_HEAD(&as->deferred_frames, frame_list))) {
00308 ast_queue_frame_head(chan, f);
00309 ast_frfree(f);
00310 }
00311 ast_channel_unlock(chan);
00312
00313 free(as);
00314
00315 return res;
00316 }
00317
00318 void ast_autoservice_init(void)
00319 {
00320 ast_cond_init(&as_cond, NULL);
00321 }