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00025 #include "asterisk.h"
00026
00027 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 284610 $")
00028
00029 #include "asterisk/file.h"
00030 #include "asterisk/logger.h"
00031 #include "asterisk/channel.h"
00032 #include "asterisk/config.h"
00033 #include "asterisk/pbx.h"
00034 #include "asterisk/module.h"
00035 #include "asterisk/frame.h"
00036 #include "asterisk/cli.h"
00037 #include "asterisk/lock.h"
00038 #include "asterisk/md5.h"
00039 #include "asterisk/linkedlists.h"
00040 #include "asterisk/chanvars.h"
00041 #include "asterisk/sched.h"
00042 #include "asterisk/io.h"
00043 #include "asterisk/utils.h"
00044 #include "asterisk/astdb.h"
00045
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00071 #define LOOPBACK_COMMON \
00072 char buf[1024]; \
00073 int res; \
00074 char *newexten=(char *)exten, *newcontext=(char *)context; \
00075 int newpriority=priority; \
00076 char *newpattern=NULL; \
00077 loopback_subst(buf, sizeof(buf), exten, context, priority, data); \
00078 loopback_parse(&newexten, &newcontext, &newpriority, &newpattern, buf); \
00079 ast_log(LOG_DEBUG, "Parsed into %s @ %s priority %d\n", newexten, newcontext, newpriority); \
00080 if (!strcasecmp(newcontext, context)) return -1
00081
00082 static char *loopback_subst(char *buf, int buflen, const char *exten, const char *context, int priority, const char *data)
00083 {
00084 struct ast_var_t *newvariable;
00085 struct varshead headp;
00086 char tmp[80];
00087
00088 snprintf(tmp, sizeof(tmp), "%d", priority);
00089 AST_LIST_HEAD_INIT_NOLOCK(&headp);
00090 newvariable = ast_var_assign("EXTEN", exten);
00091 AST_LIST_INSERT_HEAD(&headp, newvariable, entries);
00092 newvariable = ast_var_assign("CONTEXT", context);
00093 AST_LIST_INSERT_HEAD(&headp, newvariable, entries);
00094 newvariable = ast_var_assign("PRIORITY", tmp);
00095 AST_LIST_INSERT_HEAD(&headp, newvariable, entries);
00096
00097 pbx_substitute_variables_varshead(&headp, data, buf, buflen);
00098
00099 while ((newvariable = AST_LIST_REMOVE_HEAD(&headp, entries)))
00100 ast_var_delete(newvariable);
00101 return buf;
00102 }
00103
00104 static void loopback_parse(char **newexten, char **newcontext, int *priority, char **newpattern, char *buf)
00105 {
00106 char *con;
00107 char *pri;
00108 *newpattern = strchr(buf, '/');
00109 if (*newpattern)
00110 *(*newpattern)++ = '\0';
00111 con = strchr(buf, '@');
00112 if (con) {
00113 *con++ = '\0';
00114 pri = strchr(con, ':');
00115 } else
00116 pri = strchr(buf, ':');
00117 if (!ast_strlen_zero(buf))
00118 *newexten = buf;
00119 if (!ast_strlen_zero(con))
00120 *newcontext = con;
00121 if (!ast_strlen_zero(pri))
00122 sscanf(pri, "%30d", priority);
00123 }
00124
00125 static int loopback_exists(struct ast_channel *chan, const char *context, const char *exten, int priority, const char *callerid, const char *data)
00126 {
00127 LOOPBACK_COMMON;
00128 res = ast_exists_extension(chan, newcontext, newexten, newpriority, callerid);
00129 if (newpattern && !ast_extension_match(newpattern, exten))
00130 res = 0;
00131 return res;
00132 }
00133
00134 static int loopback_canmatch(struct ast_channel *chan, const char *context, const char *exten, int priority, const char *callerid, const char *data)
00135 {
00136 LOOPBACK_COMMON;
00137 res = ast_canmatch_extension(chan, newcontext, newexten, newpriority, callerid);
00138 if (newpattern && !ast_extension_match(newpattern, exten))
00139 res = 0;
00140 return res;
00141 }
00142
00143 static int loopback_exec(struct ast_channel *chan, const char *context, const char *exten, int priority, const char *callerid, const char *data)
00144 {
00145 int found;
00146 LOOPBACK_COMMON;
00147 res = ast_spawn_extension(chan, newcontext, newexten, newpriority, callerid, &found, 0);
00148 return res;
00149 }
00150
00151 static int loopback_matchmore(struct ast_channel *chan, const char *context, const char *exten, int priority, const char *callerid, const char *data)
00152 {
00153 LOOPBACK_COMMON;
00154 res = ast_matchmore_extension(chan, newcontext, newexten, newpriority, callerid);
00155 if (newpattern && !ast_extension_match(newpattern, exten))
00156 res = 0;
00157 return res;
00158 }
00159
00160 static struct ast_switch loopback_switch =
00161 {
00162 name: "Loopback",
00163 description: "Loopback Dialplan Switch",
00164 exists: loopback_exists,
00165 canmatch: loopback_canmatch,
00166 exec: loopback_exec,
00167 matchmore: loopback_matchmore,
00168 };
00169
00170 static int unload_module(void)
00171 {
00172 ast_unregister_switch(&loopback_switch);
00173 return 0;
00174 }
00175
00176 static int load_module(void)
00177 {
00178 if (ast_register_switch(&loopback_switch))
00179 return AST_MODULE_LOAD_FAILURE;
00180 return AST_MODULE_LOAD_SUCCESS;
00181 }
00182
00183 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Loopback Switch");