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00025 #include "asterisk.h"
00026
00027 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 120227 $")
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/crypto.h"
00045 #include "asterisk/astdb.h"
00046
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00072 #define LOOPBACK_COMMON \
00073 char buf[1024]; \
00074 int res; \
00075 char *newexten=(char *)exten, *newcontext=(char *)context; \
00076 int newpriority=priority; \
00077 char *newpattern=NULL; \
00078 loopback_subst(buf, sizeof(buf), exten, context, priority, data); \
00079 loopback_parse(&newexten, &newcontext, &newpriority, &newpattern, buf); \
00080 ast_log(LOG_DEBUG, "Parsed into %s @ %s priority %d\n", newexten, newcontext, newpriority); \
00081 if (!strcasecmp(newcontext, context)) return -1
00082
00083 static char *loopback_subst(char *buf, int buflen, const char *exten, const char *context, int priority, const char *data)
00084 {
00085 struct ast_var_t *newvariable;
00086 struct varshead headp;
00087 char tmp[80];
00088
00089 snprintf(tmp, sizeof(tmp), "%d", priority);
00090 AST_LIST_HEAD_INIT_NOLOCK(&headp);
00091 newvariable = ast_var_assign("EXTEN", exten);
00092 AST_LIST_INSERT_HEAD(&headp, newvariable, entries);
00093 newvariable = ast_var_assign("CONTEXT", context);
00094 AST_LIST_INSERT_HEAD(&headp, newvariable, entries);
00095 newvariable = ast_var_assign("PRIORITY", tmp);
00096 AST_LIST_INSERT_HEAD(&headp, newvariable, entries);
00097
00098 pbx_substitute_variables_varshead(&headp, data, buf, buflen);
00099
00100 while ((newvariable = AST_LIST_REMOVE_HEAD(&headp, entries)))
00101 ast_var_delete(newvariable);
00102 return buf;
00103 }
00104
00105 static void loopback_parse(char **newexten, char **newcontext, int *priority, char **newpattern, char *buf)
00106 {
00107 char *con;
00108 char *pri;
00109 *newpattern = strchr(buf, '/');
00110 if (*newpattern)
00111 *(*newpattern)++ = '\0';
00112 con = strchr(buf, '@');
00113 if (con) {
00114 *con++ = '\0';
00115 pri = strchr(con, ':');
00116 } else
00117 pri = strchr(buf, ':');
00118 if (!ast_strlen_zero(buf))
00119 *newexten = buf;
00120 if (!ast_strlen_zero(con))
00121 *newcontext = con;
00122 if (!ast_strlen_zero(pri))
00123 sscanf(pri, "%d", priority);
00124 }
00125
00126 static int loopback_exists(struct ast_channel *chan, const char *context, const char *exten, int priority, const char *callerid, const char *data)
00127 {
00128 LOOPBACK_COMMON;
00129 res = ast_exists_extension(chan, newcontext, newexten, newpriority, callerid);
00130 if (newpattern && !ast_extension_match(newpattern, exten))
00131 res = 0;
00132 return res;
00133 }
00134
00135 static int loopback_canmatch(struct ast_channel *chan, const char *context, const char *exten, int priority, const char *callerid, const char *data)
00136 {
00137 LOOPBACK_COMMON;
00138 res = ast_canmatch_extension(chan, newcontext, newexten, newpriority, callerid);
00139 if (newpattern && !ast_extension_match(newpattern, exten))
00140 res = 0;
00141 return res;
00142 }
00143
00144 static int loopback_exec(struct ast_channel *chan, const char *context, const char *exten, int priority, const char *callerid, const char *data)
00145 {
00146 int found;
00147 LOOPBACK_COMMON;
00148 res = ast_spawn_extension(chan, newcontext, newexten, newpriority, callerid, &found, 0);
00149 return res;
00150 }
00151
00152 static int loopback_matchmore(struct ast_channel *chan, const char *context, const char *exten, int priority, const char *callerid, const char *data)
00153 {
00154 LOOPBACK_COMMON;
00155 res = ast_matchmore_extension(chan, newcontext, newexten, newpriority, callerid);
00156 if (newpattern && !ast_extension_match(newpattern, exten))
00157 res = 0;
00158 return res;
00159 }
00160
00161 static struct ast_switch loopback_switch =
00162 {
00163 name: "Loopback",
00164 description: "Loopback Dialplan Switch",
00165 exists: loopback_exists,
00166 canmatch: loopback_canmatch,
00167 exec: loopback_exec,
00168 matchmore: loopback_matchmore,
00169 };
00170
00171 static int unload_module(void)
00172 {
00173 ast_unregister_switch(&loopback_switch);
00174 return 0;
00175 }
00176
00177 static int load_module(void)
00178 {
00179 if (ast_register_switch(&loopback_switch))
00180 return AST_MODULE_LOAD_FAILURE;
00181 return AST_MODULE_LOAD_SUCCESS;
00182 }
00183
00184 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Loopback Switch");