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
00027
00028
00029
00030
00031
00032 #include "asterisk.h"
00033
00034 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 361403 $")
00035
00036 #include <stdio.h>
00037 #include <stdlib.h>
00038 #include <string.h>
00039 #include <sys/types.h>
00040 #include <sys/stat.h>
00041
00042 #include "asterisk/module.h"
00043 #include "asterisk/channel.h"
00044 #include "asterisk/bridging.h"
00045 #include "asterisk/bridging_technology.h"
00046 #include "asterisk/frame.h"
00047 #include "asterisk/file.h"
00048 #include "asterisk/app.h"
00049 #include "asterisk/astobj2.h"
00050
00051
00052 static int grab_transfer(struct ast_channel *chan, char *exten, size_t exten_len, const char *context)
00053 {
00054 int res;
00055
00056
00057 res = ast_stream_and_wait(chan, "pbx-transfer", AST_DIGIT_ANY);
00058 ast_stopstream(chan);
00059
00060
00061 if (res) {
00062 exten[0] = (char)res;
00063 }
00064
00065
00066 res = ast_app_dtget(chan, context, exten, exten_len, 100, 1000);
00067
00068 return res;
00069 }
00070
00071
00072 static struct ast_channel *dial_transfer(struct ast_channel *caller, const char *exten, const char *context)
00073 {
00074 char destination[AST_MAX_EXTENSION + AST_MAX_CONTEXT + 1];
00075 struct ast_channel *chan;
00076 int cause;
00077
00078
00079 snprintf(destination, sizeof(destination), "%s@%s", exten, context);
00080
00081
00082 if (!(chan = ast_request("Local", caller->nativeformats, caller, destination, &cause))) {
00083 return NULL;
00084 }
00085
00086
00087 ast_channel_lock_both(caller, chan);
00088 ast_connected_line_copy_from_caller(&chan->connected, &caller->caller);
00089 ast_channel_inherit_variables(caller, chan);
00090 ast_channel_datastore_inherit(caller, chan);
00091 ast_channel_unlock(chan);
00092 ast_channel_unlock(caller);
00093
00094
00095 if (ast_call(chan, destination, 0)) {
00096 ast_hangup(chan);
00097 return NULL;
00098 }
00099
00100 return chan;
00101 }
00102
00103
00104 static int feature_blind_transfer(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, void *hook_pvt)
00105 {
00106 char exten[AST_MAX_EXTENSION] = "";
00107 struct ast_channel *chan = NULL;
00108 struct ast_bridge_features_blind_transfer *blind_transfer = hook_pvt;
00109 const char *context = (blind_transfer && !ast_strlen_zero(blind_transfer->context) ? blind_transfer->context : bridge_channel->chan->context);
00110
00111
00112 if (!grab_transfer(bridge_channel->chan, exten, sizeof(exten), context)) {
00113 ast_stream_and_wait(bridge_channel->chan, "pbx-invalid", AST_DIGIT_ANY);
00114 ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_WAIT);
00115 return 0;
00116 }
00117
00118
00119 if (!(chan = dial_transfer(bridge_channel->chan, exten, context))) {
00120 ast_stream_and_wait(bridge_channel->chan, "beeperr", AST_DIGIT_ANY);
00121 ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_WAIT);
00122 return 0;
00123 }
00124
00125
00126 ast_bridge_impart(bridge, chan, bridge_channel->chan, NULL);
00127
00128 return 0;
00129 }
00130
00131
00132 static int attended_threeway_transfer(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, void *hook_pvt)
00133 {
00134
00135 ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_DEPART);
00136 return 0;
00137 }
00138
00139
00140 static int attended_abort_transfer(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, void *hook_pvt)
00141 {
00142 struct ast_bridge_channel *called_bridge_channel = NULL;
00143
00144
00145 ao2_lock(bridge);
00146
00147 if (AST_LIST_FIRST(&bridge->channels) != bridge_channel) {
00148 called_bridge_channel = AST_LIST_FIRST(&bridge->channels);
00149 } else {
00150 called_bridge_channel = AST_LIST_LAST(&bridge->channels);
00151 }
00152
00153
00154 if (called_bridge_channel) {
00155 ast_bridge_change_state(called_bridge_channel, AST_BRIDGE_CHANNEL_STATE_HANGUP);
00156 }
00157
00158 ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_END);
00159
00160 ao2_unlock(bridge);
00161
00162 return 0;
00163 }
00164
00165
00166 static int feature_attended_transfer(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, void *hook_pvt)
00167 {
00168 char exten[AST_MAX_EXTENSION] = "";
00169 struct ast_channel *chan = NULL;
00170 struct ast_bridge *attended_bridge = NULL;
00171 struct ast_bridge_features caller_features, called_features;
00172 enum ast_bridge_channel_state attended_bridge_result;
00173 struct ast_bridge_features_attended_transfer *attended_transfer = hook_pvt;
00174 const char *context = (attended_transfer && !ast_strlen_zero(attended_transfer->context) ? attended_transfer->context : bridge_channel->chan->context);
00175
00176
00177 if (!grab_transfer(bridge_channel->chan, exten, sizeof(exten), context)) {
00178 ast_stream_and_wait(bridge_channel->chan, "pbx-invalid", AST_DIGIT_ANY);
00179 ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_WAIT);
00180 return 0;
00181 }
00182
00183
00184 if (!(chan = dial_transfer(bridge_channel->chan, exten, context))) {
00185 ast_stream_and_wait(bridge_channel->chan, "beeperr", AST_DIGIT_ANY);
00186 ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_WAIT);
00187 return 0;
00188 }
00189
00190
00191 if (!(attended_bridge = ast_bridge_new(AST_BRIDGE_CAPABILITY_1TO1MIX, 0))) {
00192 ast_hangup(chan);
00193 ast_stream_and_wait(bridge_channel->chan, "beeperr", AST_DIGIT_ANY);
00194 ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_WAIT);
00195 return 0;
00196 }
00197
00198
00199 ast_bridge_features_init(&called_features);
00200 ast_bridge_features_set_flag(&called_features, AST_BRIDGE_FLAG_DISSOLVE);
00201
00202
00203 ast_bridge_impart(attended_bridge, chan, NULL, &called_features);
00204
00205
00206 ast_bridge_features_init(&caller_features);
00207 ast_bridge_features_enable(&caller_features, AST_BRIDGE_BUILTIN_HANGUP,
00208 (attended_transfer && !ast_strlen_zero(attended_transfer->complete) ? attended_transfer->complete : "*1"), NULL);
00209 ast_bridge_features_hook(&caller_features, (attended_transfer && !ast_strlen_zero(attended_transfer->threeway) ? attended_transfer->threeway : "*2"),
00210 attended_threeway_transfer, NULL);
00211 ast_bridge_features_hook(&caller_features, (attended_transfer && !ast_strlen_zero(attended_transfer->abort) ? attended_transfer->abort : "*3"),
00212 attended_abort_transfer, NULL);
00213
00214
00215 attended_bridge_result = ast_bridge_join(attended_bridge, bridge_channel->chan, NULL, &caller_features);
00216
00217
00218 ast_bridge_features_cleanup(&caller_features);
00219
00220
00221 if ((attended_bridge_result != AST_BRIDGE_CHANNEL_STATE_HANGUP) && !ast_bridge_depart(attended_bridge, chan)) {
00222
00223 if (attended_bridge_result == AST_BRIDGE_CHANNEL_STATE_DEPART) {
00224
00225 ast_bridge_impart(bridge, chan, NULL, NULL);
00226 } else {
00227 ast_bridge_impart(bridge, chan, bridge_channel->chan, NULL);
00228 }
00229 } else {
00230 ast_stream_and_wait(bridge_channel->chan, "beeperr", AST_DIGIT_ANY);
00231 ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_WAIT);
00232 }
00233
00234
00235 ast_bridge_features_cleanup(&called_features);
00236 ast_bridge_destroy(attended_bridge);
00237
00238 return 0;
00239 }
00240
00241
00242 static int feature_hangup(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, void *hook_pvt)
00243 {
00244
00245 ast_bridge_change_state(bridge_channel, AST_BRIDGE_CHANNEL_STATE_END);
00246 return 0;
00247 }
00248
00249 static int unload_module(void)
00250 {
00251 return 0;
00252 }
00253
00254 static int load_module(void)
00255 {
00256 ast_bridge_features_register(AST_BRIDGE_BUILTIN_BLINDTRANSFER, feature_blind_transfer, NULL);
00257 ast_bridge_features_register(AST_BRIDGE_BUILTIN_ATTENDEDTRANSFER, feature_attended_transfer, NULL);
00258 ast_bridge_features_register(AST_BRIDGE_BUILTIN_HANGUP, feature_hangup, NULL);
00259
00260
00261 ast_module_ref(ast_module_info->self);
00262
00263 return AST_MODULE_LOAD_SUCCESS;
00264 }
00265
00266 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Built in bridging features");