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00028 #include "asterisk.h"
00029
00030 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 114667 $")
00031
00032 #include "asterisk/file.h"
00033 #include "asterisk/channel.h"
00034 #include "asterisk/pbx.h"
00035 #include "asterisk/module.h"
00036 #include "asterisk/lock.h"
00037
00038 static char *synopsis = "Wait for Ring Application";
00039
00040 static char *desc = " WaitForRing(timeout):\n"
00041 "Returns 0 after waiting at least timeout seconds. and\n"
00042 "only after the next ring has completed. Returns 0 on\n"
00043 "success or -1 on hangup\n";
00044
00045 static char *app = "WaitForRing";
00046
00047
00048 static int waitforring_exec(struct ast_channel *chan, void *data)
00049 {
00050 struct ast_frame *f;
00051 int res = 0;
00052 double s;
00053 int ms;
00054
00055 if (!data || (sscanf(data, "%lg", &s) != 1)) {
00056 ast_log(LOG_WARNING, "WaitForRing requires an argument (minimum seconds)\n");
00057 return 0;
00058 }
00059
00060 ms = s * 1000.0;
00061 while (ms > 0) {
00062 ms = ast_waitfor(chan, ms);
00063 if (ms < 0) {
00064 res = ms;
00065 break;
00066 }
00067 if (ms > 0) {
00068 f = ast_read(chan);
00069 if (!f) {
00070 res = -1;
00071 break;
00072 }
00073 if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_RING)) {
00074 ast_verb(3, "Got a ring but still waiting for timeout\n");
00075 }
00076 ast_frfree(f);
00077 }
00078 }
00079
00080 if (!res) {
00081 ms = 99999999;
00082 while(ms > 0) {
00083 ms = ast_waitfor(chan, ms);
00084 if (ms < 0) {
00085 res = ms;
00086 break;
00087 }
00088 if (ms > 0) {
00089 f = ast_read(chan);
00090 if (!f) {
00091 res = -1;
00092 break;
00093 }
00094 if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_RING)) {
00095 ast_verb(3, "Got a ring after the timeout\n");
00096 ast_frfree(f);
00097 break;
00098 }
00099 ast_frfree(f);
00100 }
00101 }
00102 }
00103
00104 return res;
00105 }
00106
00107 static int unload_module(void)
00108 {
00109 return ast_unregister_application(app);
00110 }
00111
00112 static int load_module(void)
00113 {
00114 return ast_register_application(app, waitforring_exec, synopsis, desc);
00115 }
00116
00117 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Waits until first ring after time");