00001
00002
00003
00004
00005
00006
00007
00008
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018
00019
00020
00021
00022
00023
00024
00025
00026 #include "asterisk.h"
00027
00028 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 211528 $")
00029
00030 #include <stdlib.h>
00031 #include <string.h>
00032 #include <stdio.h>
00033 #include <sys/types.h>
00034
00035 #include "asterisk/module.h"
00036 #include "asterisk/channel.h"
00037 #include "asterisk/pbx.h"
00038 #include "asterisk/logger.h"
00039 #include "asterisk/utils.h"
00040 #include "asterisk/app.h"
00041
00042 static int acf_rand_exec(struct ast_channel *chan, char *cmd,
00043 char *parse, char *buffer, size_t buflen)
00044 {
00045 struct ast_module_user *u;
00046 int min_int, response_int, max_int;
00047 AST_DECLARE_APP_ARGS(args,
00048 AST_APP_ARG(min);
00049 AST_APP_ARG(max);
00050 );
00051
00052 u = ast_module_user_add(chan);
00053
00054 AST_STANDARD_APP_ARGS(args, parse);
00055
00056 if (ast_strlen_zero(args.min) || sscanf(args.min, "%30d", &min_int) != 1)
00057 min_int = 0;
00058
00059 if (ast_strlen_zero(args.max) || sscanf(args.max, "%30d", &max_int) != 1)
00060 max_int = RAND_MAX;
00061
00062 if (max_int < min_int) {
00063 int tmp = max_int;
00064
00065 max_int = min_int;
00066 min_int = tmp;
00067 ast_log(LOG_DEBUG, "max<min\n");
00068 }
00069
00070 response_int = min_int + (ast_random() % (max_int - min_int + 1));
00071 ast_log(LOG_DEBUG, "%d was the lucky number in range [%d,%d]\n",
00072 response_int, min_int, max_int);
00073 snprintf(buffer, buflen, "%d", response_int);
00074
00075 ast_module_user_remove(u);
00076
00077 return 0;
00078 }
00079
00080 static struct ast_custom_function acf_rand = {
00081 .name = "RAND",
00082 .synopsis = "Choose a random number in a range",
00083 .syntax = "RAND([min][|max])",
00084 .desc =
00085 "Choose a random number between min and max. Min defaults to 0, if not\n"
00086 "specified, while max defaults to RAND_MAX (2147483647 on many systems).\n"
00087 " Example: Set(junky=${RAND(1|8)}); \n"
00088 " Sets junky to a random number between 1 and 8, inclusive.\n",
00089 .read = acf_rand_exec,
00090 };
00091
00092 static int unload_module(void)
00093 {
00094 ast_custom_function_unregister(&acf_rand);
00095
00096 return 0;
00097 }
00098
00099 static int load_module(void)
00100 {
00101 return ast_custom_function_register(&acf_rand);
00102 }
00103
00104 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Random number dialplan function");