app_waitforring.c
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00028 #include "asterisk.h"
00029
00030 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 40722 $")
00031
00032 #include <stdlib.h>
00033 #include <stdio.h>
00034 #include <string.h>
00035 #include <unistd.h>
00036 #include <sys/types.h>
00037
00038 #include "asterisk/file.h"
00039 #include "asterisk/logger.h"
00040 #include "asterisk/channel.h"
00041 #include "asterisk/pbx.h"
00042 #include "asterisk/module.h"
00043 #include "asterisk/options.h"
00044 #include "asterisk/lock.h"
00045
00046 static char *synopsis = "Wait for Ring Application";
00047
00048 static char *desc = " WaitForRing(timeout)\n"
00049 "Returns 0 after waiting at least timeout seconds. and\n"
00050 "only after the next ring has completed. Returns 0 on\n"
00051 "success or -1 on hangup\n";
00052
00053 static char *app = "WaitForRing";
00054
00055
00056 static int waitforring_exec(struct ast_channel *chan, void *data)
00057 {
00058 struct ast_module_user *u;
00059 struct ast_frame *f;
00060 int res = 0;
00061 int ms;
00062
00063 if (!data || (sscanf(data, "%d", &ms) != 1)) {
00064 ast_log(LOG_WARNING, "WaitForRing requires an argument (minimum seconds)\n");
00065 return 0;
00066 }
00067
00068 u = ast_module_user_add(chan);
00069
00070 ms *= 1000;
00071 while(ms > 0) {
00072 ms = ast_waitfor(chan, ms);
00073 if (ms < 0) {
00074 res = ms;
00075 break;
00076 }
00077 if (ms > 0) {
00078 f = ast_read(chan);
00079 if (!f) {
00080 res = -1;
00081 break;
00082 }
00083 if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_RING)) {
00084 if (option_verbose > 2)
00085 ast_verbose(VERBOSE_PREFIX_3 "Got a ring but still waiting for timeout\n");
00086 }
00087 ast_frfree(f);
00088 }
00089 }
00090
00091 if (!res) {
00092 ms = 99999999;
00093 while(ms > 0) {
00094 ms = ast_waitfor(chan, ms);
00095 if (ms < 0) {
00096 res = ms;
00097 break;
00098 }
00099 if (ms > 0) {
00100 f = ast_read(chan);
00101 if (!f) {
00102 res = -1;
00103 break;
00104 }
00105 if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_RING)) {
00106 if (option_verbose > 2)
00107 ast_verbose(VERBOSE_PREFIX_3 "Got a ring after the timeout\n");
00108 ast_frfree(f);
00109 break;
00110 }
00111 ast_frfree(f);
00112 }
00113 }
00114 }
00115 ast_module_user_remove(u);
00116
00117 return res;
00118 }
00119
00120 static int unload_module(void)
00121 {
00122 int res;
00123
00124 res = ast_unregister_application(app);
00125
00126 ast_module_user_hangup_all();
00127
00128 return res;
00129 }
00130
00131 static int load_module(void)
00132 {
00133 return ast_register_application(app, waitforring_exec, synopsis, desc);
00134 }
00135
00136 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Waits until first ring after time");