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00029 #include "asterisk.h"
00030
00031 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 396279 $")
00032
00033 #include "asterisk/file.h"
00034 #include "asterisk/logger.h"
00035 #include "asterisk/channel.h"
00036 #include "asterisk/config.h"
00037 #include "asterisk/pbx.h"
00038 #include "asterisk/module.h"
00039 #include "asterisk/frame.h"
00040 #include "asterisk/cli.h"
00041 #include "asterisk/lock.h"
00042 #include "asterisk/md5.h"
00043 #include "asterisk/linkedlists.h"
00044 #include "asterisk/chanvars.h"
00045 #include "asterisk/sched.h"
00046 #include "asterisk/io.h"
00047 #include "asterisk/utils.h"
00048 #include "asterisk/astdb.h"
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00075 #define LOOPBACK_COMMON \
00076 char buf[1024]; \
00077 int res; \
00078 char *newexten=(char *)exten, *newcontext=(char *)context; \
00079 int newpriority=priority; \
00080 char *newpattern=NULL; \
00081 loopback_subst(buf, sizeof(buf), exten, context, priority, data); \
00082 loopback_parse(&newexten, &newcontext, &newpriority, &newpattern, buf); \
00083 ast_log(LOG_DEBUG, "Parsed into %s @ %s priority %d\n", newexten, newcontext, newpriority); \
00084 if (!strcasecmp(newcontext, context)) return -1
00085
00086 static char *loopback_subst(char *buf, int buflen, const char *exten, const char *context, int priority, const char *data)
00087 {
00088 struct ast_var_t *newvariable;
00089 struct varshead headp;
00090 char tmp[80];
00091
00092 snprintf(tmp, sizeof(tmp), "%d", priority);
00093 AST_LIST_HEAD_INIT_NOLOCK(&headp);
00094 if ((newvariable = ast_var_assign("EXTEN", exten))) {
00095 AST_LIST_INSERT_HEAD(&headp, newvariable, entries);
00096 }
00097 if ((newvariable = ast_var_assign("CONTEXT", context))) {
00098 AST_LIST_INSERT_HEAD(&headp, newvariable, entries);
00099 }
00100 if ((newvariable = ast_var_assign("PRIORITY", tmp))) {
00101 AST_LIST_INSERT_HEAD(&headp, newvariable, entries);
00102 }
00103
00104 pbx_substitute_variables_varshead(&headp, data, buf, buflen);
00105
00106 while ((newvariable = AST_LIST_REMOVE_HEAD(&headp, entries)))
00107 ast_var_delete(newvariable);
00108 return buf;
00109 }
00110
00111 static void loopback_parse(char **newexten, char **newcontext, int *priority, char **newpattern, char *buf)
00112 {
00113 char *con;
00114 char *pri;
00115 *newpattern = strchr(buf, '/');
00116 if (*newpattern)
00117 *(*newpattern)++ = '\0';
00118 con = strchr(buf, '@');
00119 if (con) {
00120 *con++ = '\0';
00121 pri = strchr(con, ':');
00122 } else
00123 pri = strchr(buf, ':');
00124 if (!ast_strlen_zero(buf))
00125 *newexten = buf;
00126 if (!ast_strlen_zero(con))
00127 *newcontext = con;
00128 if (!ast_strlen_zero(pri))
00129 sscanf(pri, "%30d", priority);
00130 }
00131
00132 static int loopback_exists(struct ast_channel *chan, const char *context, const char *exten, int priority, const char *callerid, const char *data)
00133 {
00134 LOOPBACK_COMMON;
00135 res = ast_exists_extension(chan, newcontext, newexten, newpriority, callerid);
00136 if (newpattern && !ast_extension_match(newpattern, exten))
00137 res = 0;
00138 return res;
00139 }
00140
00141 static int loopback_canmatch(struct ast_channel *chan, const char *context, const char *exten, int priority, const char *callerid, const char *data)
00142 {
00143 LOOPBACK_COMMON;
00144 res = ast_canmatch_extension(chan, newcontext, newexten, newpriority, callerid);
00145 if (newpattern && !ast_extension_match(newpattern, exten))
00146 res = 0;
00147 return res;
00148 }
00149
00150 static int loopback_exec(struct ast_channel *chan, const char *context, const char *exten, int priority, const char *callerid, const char *data)
00151 {
00152 int found;
00153 LOOPBACK_COMMON;
00154 res = ast_spawn_extension(chan, newcontext, newexten, newpriority, callerid, &found, 0);
00155 return res;
00156 }
00157
00158 static int loopback_matchmore(struct ast_channel *chan, const char *context, const char *exten, int priority, const char *callerid, const char *data)
00159 {
00160 LOOPBACK_COMMON;
00161 res = ast_matchmore_extension(chan, newcontext, newexten, newpriority, callerid);
00162 if (newpattern && !ast_extension_match(newpattern, exten))
00163 res = 0;
00164 return res;
00165 }
00166
00167 static struct ast_switch loopback_switch =
00168 {
00169 .name = "Loopback",
00170 .description = "Loopback Dialplan Switch",
00171 .exists = loopback_exists,
00172 .canmatch = loopback_canmatch,
00173 .exec = loopback_exec,
00174 .matchmore = loopback_matchmore,
00175 };
00176
00177 static int unload_module(void)
00178 {
00179 ast_unregister_switch(&loopback_switch);
00180 return 0;
00181 }
00182
00183 static int load_module(void)
00184 {
00185 if (ast_register_switch(&loopback_switch))
00186 return AST_MODULE_LOAD_FAILURE;
00187 return AST_MODULE_LOAD_SUCCESS;
00188 }
00189
00190 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Loopback Switch");