/* send keep-alive
* dlg - pointer to a struct dlg_cell
* dir - direction: the request will be sent to:
* DLG_CALLER_LEG (0): caller
* DLG_CALLEE_LEG (1): callee
*/
int dlg_send_ka(dlg_cell_t *dlg, int dir, str *hdrs)
{
uac_req_t uac_r;
dlg_t* di;
str met = {"OPTIONS", 7};
int result;
dlg_iuid_t *iuid = NULL;
/* do not send KA request for non-confirmed dialogs (not supported) */
if (dlg->state != DLG_STATE_CONFIRMED) {
LM_DBG("skipping non-confirmed dialogs\n");
return 0;
}
/* build tm dlg by direction */
if ((di = build_dlg_t(dlg, dir)) == 0){
LM_ERR("failed to create dlg_t\n");
goto err;
}
/* tm increases cseq value, decrease it no to make it invalid
* - dialog is ended on timeout (408) or C/L does not exist (481) */
if(di->loc_seq.value>1)
di->loc_seq.value -= 2;
else
di->loc_seq.value -= 1;
LM_DBG("sending BYE to %s\n", (dir==DLG_CALLER_LEG)?"caller":"callee");
iuid = dlg_get_iuid_shm_clone(dlg);
if(iuid==NULL)
{
LM_ERR("failed to create dialog unique id clone\n");
goto err;
}
memset(&uac_r,'\0', sizeof(uac_req_t));
set_uac_req(&uac_r, &met, hdrs, NULL, di, TMCB_LOCAL_COMPLETED,
dlg_ka_cb, (void*)iuid);
result = d_tmb.t_request_within(&uac_r);
if(result < 0){
LM_ERR("failed to send the BYE request\n");
goto err;
}
free_tm_dlg(di);
LM_DBG("keep-alive sent to %s\n", (dir==0)?"caller":"callee");
return 0;
err:
if(di)
free_tm_dlg(di);
return -1;
}
/* cell- pointer to a struct dlg_cell
* leg - a dialog leg to be BYE'ed :
* = 0: caller leg
* > 0: callee legs
*/
static inline int send_leg_bye(struct dlg_cell *cell, int dst_leg, int src_leg,
str *extra_hdrs)
{
context_p old_ctx;
context_p *new_ctx;
dlg_t* dialog_info;
str met = {"BYE", 3};
int result;
if ((dialog_info = build_dlg_t(cell, dst_leg, src_leg)) == 0){
LM_ERR("failed to create dlg_t\n");
goto err;
}
LM_DBG("sending BYE to %s (%d)\n",
(dst_leg==DLG_CALLER_LEG)?"caller":"callee", dst_leg);
/* set new processing context */
if (push_new_processing_context( cell, &old_ctx, &new_ctx, NULL)!=0)
goto err;
ctx_lastdstleg_set(dst_leg);
ref_dlg(cell, 1);
result = d_tmb.t_request_within
(&met, /* method*/
extra_hdrs, /* extra headers*/
NULL, /* body*/
dialog_info, /* dialog structure*/
bye_reply_cb, /* callback function*/
(void*)cell, /* callback parameter*/
NULL); /* release function*/
/* reset the processing contect */
if (current_processing_ctx == NULL)
*new_ctx = NULL;
else
context_destroy(CONTEXT_GLOBAL, *new_ctx);
current_processing_ctx = old_ctx;
if(result < 0){
LM_ERR("failed to send the BYE request\n");
goto err1;
}
free_tm_dlg(dialog_info);
LM_DBG("BYE sent to %s\n", (dst_leg==DLG_CALLER_LEG)?"caller":"callee");
return 0;
err1:
unref_dlg(cell, 1);
err:
return -1;
}
static int dlg_refer_callee(dlg_transfer_ctx_t *dtc)
{
/*verify direction*/
dlg_t* dialog_info = NULL;
str met = {"REFER", 5};
int result;
str hdrs;
struct dlg_cell *dlg;
uac_req_t uac_r;
dlg = dtc->dlg;
if ((dialog_info = build_dlg_t(dlg, DLG_CALLEE_LEG)) == 0){
LM_ERR("failed to create dlg_t\n");
goto error;
}
hdrs.len = 23 + 2*CRLF_LEN + dlg_bridge_controller.len
+ dtc->to.len + dlg_bridge_ref_hdrs.len;
LM_DBG("sending REFER [%d] <%.*s>\n", hdrs.len, dtc->to.len, dtc->to.s);
hdrs.s = (char*)pkg_malloc(hdrs.len*sizeof(char));
if(hdrs.s == NULL)
goto error;
memcpy(hdrs.s, "Referred-By: ", 13);
memcpy(hdrs.s+13, dlg_bridge_controller.s, dlg_bridge_controller.len);
memcpy(hdrs.s+13+dlg_bridge_controller.len, CRLF, CRLF_LEN);
memcpy(hdrs.s+13+dlg_bridge_controller.len+CRLF_LEN, "Refer-To: ", 10);
memcpy(hdrs.s+23+dlg_bridge_controller.len+CRLF_LEN, dtc->to.s,
dtc->to.len);
memcpy(hdrs.s+23+dlg_bridge_controller.len+CRLF_LEN+dtc->to.len,
CRLF, CRLF_LEN);
memcpy(hdrs.s+23+dlg_bridge_controller.len+CRLF_LEN+dtc->to.len+CRLF_LEN,
dlg_bridge_ref_hdrs.s, dlg_bridge_ref_hdrs.len);
set_uac_req(&uac_r, &met, &hdrs, NULL, dialog_info, TMCB_LOCAL_COMPLETED,
dlg_refer_tm_callback, (void*)dtc);
result = d_tmb.t_request_within(&uac_r);
pkg_free(hdrs.s);
if(result < 0) {
LM_ERR("failed to send the REFER request\n");
/* todo: clean-up dtc */
goto error;
}
free_tm_dlg(dialog_info);
LM_DBG("REFER sent\n");
return 0;
error:
if(dialog_info)
free_tm_dlg(dialog_info);
return -1;
}
void dlg_refer_tm_callback(struct cell *t, int type, struct tmcb_params *ps)
{
dlg_transfer_ctx_t *dtc = NULL;
dlg_t* dialog_info = NULL;
str met = {"BYE", 3};
int result;
struct dlg_cell *dlg;
uac_req_t uac_r;
if(ps->param==NULL || *ps->param==0)
{
LM_DBG("message id not received\n");
return;
}
dtc = *((dlg_transfer_ctx_t**)ps->param);
if(dtc==NULL)
return;
LM_DBG("REFER completed with status %d\n", ps->code);
/* we send the BYE anyhow */
dlg = dtc->dlg;
if ((dialog_info = build_dlg_t(dlg, DLG_CALLEE_LEG)) == 0){
LM_ERR("failed to create dlg_t\n");
goto error;
}
/* after REFER, the CSeq must be increased */
dialog_info->loc_seq.value++;
set_uac_req(&uac_r, &met, NULL, NULL, dialog_info, 0, NULL, NULL);
result = d_tmb.t_request_within(&uac_r);
if(result < 0) {
LM_ERR("failed to send the REFER request\n");
/* todo: clean-up dtc */
goto error;
}
free_tm_dlg(dialog_info);
dlg_transfer_ctx_free(dtc);
LM_DBG("BYE sent\n");
return;
error:
dlg_transfer_ctx_free(dtc);
if(dialog_info)
free_tm_dlg(dialog_info);
return;
}
/* cell- pointer to a struct dlg_cell
* dir- direction: the request will be sent to:
* DLG_CALLER_LEG (0): caller
* DLG_CALLEE_LEG (1): callee
*/
static inline int send_bye(struct dlg_cell * cell, int dir, str *hdrs)
{
uac_req_t uac_r;
dlg_t* dialog_info;
str met = {"BYE", 3};
int result;
dlg_iuid_t *iuid = NULL;
/* do not send BYE request for non-confirmed dialogs (not supported) */
if (cell->state != DLG_STATE_CONFIRMED_NA && cell->state != DLG_STATE_CONFIRMED) {
LM_ERR("terminating non-confirmed dialogs not supported\n");
return -1;
}
/*verify direction*/
if ((dialog_info = build_dlg_t(cell, dir)) == 0){
LM_ERR("failed to create dlg_t\n");
goto err;
}
LM_DBG("sending BYE to %s\n", (dir==DLG_CALLER_LEG)?"caller":"callee");
iuid = dlg_get_iuid_shm_clone(cell);
if(iuid==NULL)
{
LM_ERR("failed to create dialog unique id clone\n");
goto err;
}
memset(&uac_r,'\0', sizeof(uac_req_t));
set_uac_req(&uac_r, &met, hdrs, NULL, dialog_info, TMCB_LOCAL_COMPLETED,
bye_reply_cb, (void*)iuid);
result = d_tmb.t_request_within(&uac_r);
if(result < 0){
LM_ERR("failed to send the BYE request\n");
goto err;
}
free_tm_dlg(dialog_info);
LM_DBG("BYE sent to %s\n", (dir==0)?"caller":"callee");
return 0;
err:
if(dialog_info)
free_tm_dlg(dialog_info);
return -1;
}
/* cell- pointer to a struct dlg_cell
* leg - a dialog leg to be BYE'ed :
* = 0: caller leg
* > 0: callee legs
*/
static inline int send_leg_bye(struct dlg_cell *cell, int dst_leg, int src_leg,
str *extra_hdrs)
{
dlg_t* dialog_info;
struct dlg_cell *old_cell;
str met = {"BYE", 3};
int result;
if ((dialog_info = build_dlg_t(cell, dst_leg, src_leg)) == 0){
LM_ERR("failed to create dlg_t\n");
goto err;
}
LM_DBG("sending BYE to %s (%d)\n",
(dst_leg==DLG_CALLER_LEG)?"caller":"callee", dst_leg);
ref_dlg(cell, 1);
old_cell = current_dlg_pointer;
current_dlg_pointer = cell;
result = d_tmb.t_request_within
(&met, /* method*/
extra_hdrs, /* extra headers*/
NULL, /* body*/
dialog_info, /* dialog structure*/
bye_reply_cb, /* callback function*/
(void*)cell, /* callback parameter*/
NULL); /* release function*/
current_dlg_pointer = old_cell;
if(result < 0){
LM_ERR("failed to send the BYE request\n");
goto err1;
}
free_tm_dlg(dialog_info);
LM_DBG("BYE sent to %s\n", (dst_leg==DLG_CALLER_LEG)?"caller":"callee");
return 0;
err1:
unref_dlg(cell, 1);
err:
return -1;
}
