/**
* Given a call-id, locate if its terminating,orginating or both
* release the dialog involved and drop the dialog
* @param callid - the Call-ID to release
* @param reason - the Reason header to include in messages
* @returns 0 on error, 1 on success
*/
int release_call(str callid,str reason)
{
s_dialog *d=0;
unsigned int hash;
int res = 0;
d = get_s_dialog_dir(callid,DLG_MOBILE_ORIGINATING);
if (d) {
hash = d->hash;
if (release_call_s(d,reason)>0) res = 1;
goto done;
}
d = get_s_dialog_dir(callid,DLG_MOBILE_TERMINATING);
if (d) {
hash = d->hash;
if (release_call_s(d,reason)>0) res = 1;
goto done;
}
/*Neither ORGINATING nor TERMINATING is UNKNOWN!*/
/*or doesn't exist*/
/*drop it silently?*/
/*treat it as ORIGINATING or TERMINATING?*/
done:
if (d) d_unlock(hash);
return res;
}
/**
* Drops and deletes a dialog.
* @param msg - the request/response
* @param str1 - direction - "orig" or "term"
* @param str2 - not used
* @returns #CSCF_RETURN_TRUE if ok, #CSCF_RETURN_FALSE if not or #CSCF_RETURN_BREAK on error
*/
int S_drop_dialog(struct sip_msg* msg, char* str1, char* str2)
{
str call_id;
s_dialog *d;
int hash;
// struct sip_msg *req;
enum s_dialog_direction dir = get_dialog_direction(str1);
// if (!find_dialog_aor(msg,str1,&aor)){
// LOG(L_ERR,"ERR:"M_NAME":S_is_in_dialog(): Error retrieving %s contact\n",str1);
// return CSCF_RETURN_BREAK;
// }
call_id = cscf_get_call_id(msg,0);
if (!call_id.len)
return CSCF_RETURN_FALSE;
LOG(L_DBG,"DBG:"M_NAME":S_drop_dialog(%s): Call-ID <%.*s> DIR[%d]\n",
str1,call_id.len,call_id.s,
dir);
d = get_s_dialog_dir(call_id,dir);
// if (!d && msg->first_line.type==SIP_REPLY){
// /* Try to get the dialog from the request */
// req = cscf_get_request_from_reply(msg);
// if (!find_dialog_aor(req,str1,&aor)){
// LOG(L_ERR,"ERR:"M_NAME":S_update_dialog(%s): Error retrieving %s contact\n",str1,str1);
// return CSCF_RETURN_BREAK;
// }
// d = get_s_dialog(call_id,aor);
// }
if (!d){
LOG(L_ERR,"ERR:"M_NAME":S_drop_dialog: dialog does not exists!\n");
return CSCF_RETURN_FALSE;
}
hash = d->hash;
del_s_dialog(d);
d_unlock(hash);
print_s_dialogs(L_INFO);
return CSCF_RETURN_TRUE;
}
/**
* Callback function for BYE requests!
* Identify the s_dialog, then see if one BYE has already been recieved
* if yes drop it , if no, wait for the second
*/
void bye_response(struct cell *t,int type,struct tmcb_params *ps)
{
s_dialog *d;
unsigned int hash;
str call_id;
enum s_dialog_direction dir;
if (!ps->param) return;
dir = *((enum s_dialog_direction *) *(ps->param));
shm_free(*ps->param);
*ps->param = 0;
call_id = t->callid;
call_id.s+=9;
call_id.len-=11;
LOG(L_INFO,"DBG:"M_NAME":bye_response(): Received a %d response to BYE for a call release for <%.*s> DIR[%d].\n",
ps->code, call_id.len,call_id.s,dir);
d = get_s_dialog_dir(call_id,dir);
if (!d) {
LOG(L_ERR,"ERR:"M_NAME":bye_response(): Received a BYE response for a call release but there is no dialog for <%.*s> DIR[%d].\n",
call_id.len,call_id.s,dir);
return;
}
if (ps->code>=200){
if (d->state==DLG_STATE_TERMINATED_ONE_SIDE){
hash=d->hash;
LOG(L_INFO,"INFO:"M_NAME":bye_response(): Received a response to second BYE. Dialog is dropped.\n");
del_s_dialog(d);
d_unlock(hash);
} else {
hash=d->hash;
d->state=DLG_STATE_TERMINATED_ONE_SIDE;
d_unlock(hash);
}
}
}
/**
* Updates a dialog.
* If the initial request was:
* - INVITE - refreshes the expiration or looks for the BYE and destroys the dialog
* if found
* - SUBSCRIBE - looks for the Subscription-state in NOTIFY, refreshes the expiration
* and if terminated destroys the dialog
* - When adding more dialogs, add the refreshal methods here or they will expire and will
* be destroyed. Also add the termination to reduce the memory consumption and improve the
* performance.
* @param msg - the request/response
* @param str1 - direction - "orig" or "term"
* @param str2 - not used
* @returns #CSCF_RETURN_TRUE if ok, #CSCF_RETURN_FALSE if not or #CSCF_RETURN_BREAK on error
*/
int S_update_dialog(struct sip_msg* msg, char* str1, char* str2)
{
str call_id;
s_dialog *d;
int response;
int cseq;
struct hdr_field *h=0;
struct sip_msg *req=0;
int expires=0;
str totag;
time_t t_time;
str ses_exp = {0,0};
str refresher = {0,0};
enum s_dialog_direction dir = get_dialog_direction(str1);
// if (!find_dialog_aor(msg,str1,&aor)){
// req = cscf_get_request_from_reply(msg);
// if (!find_dialog_aor(req,str1,&aor)){
// LOG(L_ERR,"ERR:"M_NAME":S_update_dialog(%s): Error retrieving %s contact\n",str1,str1);
// return CSCF_RETURN_BREAK;
// }
// }
call_id = cscf_get_call_id(msg,0);
if (!call_id.len)
return CSCF_RETURN_FALSE;
LOG(L_DBG,"DBG:"M_NAME":S_update_dialog(%s): Call-ID <%.*s>\n",str1,call_id.len,call_id.s);
d = get_s_dialog_dir(call_id,dir);
// if (!d && msg->first_line.type==SIP_REPLY){
// /* Try to get the dialog from the request */
// if (!req) req = cscf_get_request_from_reply(msg);
// if (!find_dialog_aor(req,str1,&aor)){
// LOG(L_ERR,"ERR:"M_NAME":S_update_dialog(%s): Error retrieving %s contact\n",str1,str1);
// return CSCF_RETURN_BREAK;
// }
// d = get_s_dialog_dir(call_id,aor);
// }
if (!d){
LOG(L_INFO,"INFO:"M_NAME":S_update_dialog: dialog does not exists!\n");
return CSCF_RETURN_FALSE;
}
if (msg->first_line.type==SIP_REQUEST){
/* Request */
LOG(L_DBG,"DBG:"M_NAME":S_update_dialog(%s): Method <%.*s> \n",str1,
msg->first_line.u.request.method.len,msg->first_line.u.request.method.s);
cseq = cscf_get_cseq(msg,&h);
if (cseq>d->last_cseq) d->last_cseq = cseq;
if (get_dialog_method(msg->first_line.u.request.method) == DLG_METHOD_INVITE)
{
d->uac_supp_timer = supports_extension(msg, &str_ext_timer);
ses_exp = cscf_get_session_expires_body(msg, &h);
t_time = cscf_get_session_expires(ses_exp, &refresher);
if (!t_time)
{
d->expires = d_act_time()+scscf_dialogs_expiration_time;
d->lr_session_expires = 0;
}
else
{
d->expires = d_act_time() + t_time;
d->lr_session_expires = t_time;
if (refresher.len)
STR_SHM_DUP(d->refresher, refresher, "DIALOG_REFRESHER");
}
}
else if (d->method == DLG_METHOD_SUBSCRIBE &&
msg->first_line.u.request.method.len == 6 &&
strncasecmp(msg->first_line.u.request.method.s,"NOTIFY",6)==0)
{
// Subscription-State header is mandatory for NOTIFY. See RFC 3265, Section 7.2
expires = cscf_get_subscription_state(msg);
if (expires >= 0)
d->expires = d_act_time()+expires;
else
d->expires = d_act_time()+scscf_dialogs_expiration_time;
}
else
{
expires = cscf_get_expires_hdr(msg,0);
if (expires >= 0)
d->expires = d_act_time()+expires;
else
d->expires = d_act_time()+scscf_dialogs_expiration_time;
d->lr_session_expires = 0;
}
}else{
/* Reply */
response = msg->first_line.u.reply.statuscode;
LOG(L_DBG,"DBG:"M_NAME":S_update_dialog(%s): <%d> \n",str1,response);
cseq = cscf_get_cseq(msg,&h);
if (cseq==0 || h==0) return CSCF_RETURN_FALSE;
if (d->first_cseq==cseq && d->method_str.len == ((struct cseq_body *)h->parsed)->method.len &&
strncasecmp(d->method_str.s,((struct cseq_body *)h->parsed)->method.s,d->method_str.len)==0 &&
d->state < DLG_STATE_CONFIRMED){
/* reply to initial request */
if (response<200){
d->state = DLG_STATE_EARLY;
d->expires = d_act_time()+300;
}else
if (response>=200 && response<300){
d->state = DLG_STATE_CONFIRMED;
update_dialog_on_reply(msg, d);
/*I save the dialogs only here because
* i only want to release confirmed dialogs*/
cscf_get_to_tag(msg,&totag);
if (d->dialog_s){
tmb.update_dlg_uas(d->dialog_s,response,&totag);
tmb.dlg_response_uac(d->dialog_c,msg,IS_NOT_TARGET_REFRESH);
}else{
LOG(L_ERR,"ERR:S_update_dialog(): dialog_s for dialog was NULL!\n");
}
}else
if (response>300){
d->state = DLG_STATE_TERMINATED;
d_unlock(d->hash);
struct cell * t = tmb.t_gett();
if(t->nr_of_outgoings < 2)
return S_drop_dialog(msg,str1,str2);
}
}else{
/* reply to subsequent request */
if (!req) req = cscf_get_request_from_reply(msg);
/* destroy dialogs on specific methods */
switch (d->method){
case DLG_METHOD_OTHER:
d->expires = d_act_time()+scscf_dialogs_expiration_time;
d->lr_session_expires = 0;
break;
case DLG_METHOD_INVITE:
if (req && req->first_line.u.request.method.len==3 &&
strncasecmp(req->first_line.u.request.method.s,"BYE",3)==0){
d->state = DLG_STATE_TERMINATED;
d_unlock(d->hash);
return S_drop_dialog(msg,str1,str2);
}
update_dialog_on_reply(msg, d);
break;
case DLG_METHOD_SUBSCRIBE:
// if (req && req->first_line.u.request.method.len==9 &&
// strncasecmp(req->first_line.u.request.method.s,"SUBSCRIBE",9)==0 &&
// cscf_get_expires_hdr(msg)==0){
// d->state = DLG_STATE_TERMINATED;
// d_unlock(d->hash);
// return P_dros_dialog(msg,str1,str2);
// }
if (req && req->first_line.u.request.method.len==6 &&
strncasecmp(req->first_line.u.request.method.s,"NOTIFY",6)==0){
expires = cscf_get_subscription_state(req);
if (expires==0){
d->state = DLG_STATE_TERMINATED;
d_unlock(d->hash);
return S_drop_dialog(msg,str1,str2);
}else if (expires>0){
d->expires = d_act_time() + expires;
}
}
else if (req && req->first_line.u.request.method.len==9 &&
strncasecmp(req->first_line.u.request.method.s,"SUBSCRIBE",9)==0){
expires = cscf_get_expires_hdr(msg,0);
if (expires >= 0)
d->expires = d_act_time()+expires;
else
d->expires = d_act_time()+scscf_dialogs_expiration_time;
}
break;
}
if (cseq>d->last_cseq) d->last_cseq = cseq;
}
}
d_unlock(d->hash);
print_s_dialogs(L_INFO);
return CSCF_RETURN_TRUE;
out_of_memory:
if (d) d_unlock(d->hash);
return CSCF_RETURN_ERROR;
}
/**
* Updates a dialog.
* If the initial request was:
* - INVITE - refreshes the expiration or looks for the BYE and destroys the dialog
* if found
* - SUBSCRIBE - looks for the Subscription-state in NOTIFY, refreshes the expiration
* and if terminated destroys the dialog
* - When adding more dialogs, add the refreshal methods here or they will expire and will
* be destroyed. Also add the termination to reduce the memory consumption and improve the
* performance.
* @param msg - the request/response
* @param str1 - direction - "orig" or "term"
* @param str2 - not used
* @returns #CSCF_RETURN_TRUE if ok, #CSCF_RETURN_FALSE if not or #CSCF_RETURN_BREAK on error
*/
int S_update_dialog(struct sip_msg* msg, char* str1, char* str2)
{
str call_id;
s_dialog *d;
int response;
int cseq;
struct hdr_field *h=0;
struct sip_msg *req=0;
int expires=0;
str totag;
enum s_dialog_direction dir = get_dialog_direction(str1);
// if (!find_dialog_aor(msg,str1,&aor)){
// req = cscf_get_request_from_reply(msg);
// if (!find_dialog_aor(req,str1,&aor)){
// LOG(L_ERR,"ERR:"M_NAME":S_update_dialog(%s): Error retrieving %s contact\n",str1,str1);
// return CSCF_RETURN_BREAK;
// }
// }
call_id = cscf_get_call_id(msg,0);
if (!call_id.len)
return CSCF_RETURN_FALSE;
LOG(L_INFO,"DBG:"M_NAME":S_update_dialog(%s): Call-ID <%.*s>\n",str1,call_id.len,call_id.s);
d = get_s_dialog_dir(call_id,dir);
// if (!d && msg->first_line.type==SIP_REPLY){
// /* Try to get the dialog from the request */
// if (!req) req = cscf_get_request_from_reply(msg);
// if (!find_dialog_aor(req,str1,&aor)){
// LOG(L_ERR,"ERR:"M_NAME":S_update_dialog(%s): Error retrieving %s contact\n",str1,str1);
// return CSCF_RETURN_BREAK;
// }
// d = get_s_dialog_dir(call_id,aor);
// }
if (!d){
LOG(L_INFO,"INFO:"M_NAME":S_update_dialog: dialog does not exists!\n");
return CSCF_RETURN_FALSE;
}
if (msg->first_line.type==SIP_REQUEST){
/* Request */
LOG(L_DBG,"DBG:"M_NAME":S_update_dialog(%s): Method <%.*s> \n",str1,
msg->first_line.u.request.method.len,msg->first_line.u.request.method.s);
cseq = cscf_get_cseq(msg,&h);
if (cseq>d->last_cseq) d->last_cseq = cseq;
d->expires = d_act_time()+scscf_dialogs_expiration_time;
}else{
/* Reply */
response = msg->first_line.u.reply.statuscode;
LOG(L_DBG,"DBG:"M_NAME":S_update_dialog(%s): <%d> \n",str1,response);
cseq = cscf_get_cseq(msg,&h);
if (cseq==0 || h==0) return CSCF_RETURN_FALSE;
if (d->first_cseq==cseq && d->method_str.len == ((struct cseq_body *)h->parsed)->method.len &&
strncasecmp(d->method_str.s,((struct cseq_body *)h->parsed)->method.s,d->method_str.len)==0 &&
d->state < DLG_STATE_CONFIRMED){
/* reply to initial request */
if (response<200){
d->state = DLG_STATE_EARLY;
d->expires = d_act_time()+300;
}else
if (response>=200 && response<300){
d->state = DLG_STATE_CONFIRMED;
d->expires = d_act_time()+scscf_dialogs_expiration_time;
/*I save the dialogs only here because
* i only want to release confirmed dialogs*/
cscf_get_to_tag(msg,&totag);
tmb.update_dlg_uas(d->dialog_s,response,&totag);
tmb.dlg_response_uac(d->dialog_c,msg,IS_NOT_TARGET_REFRESH);
}else
if (response>300){
d->state = DLG_STATE_TERMINATED;
d_unlock(d->hash);
return S_drop_dialog(msg,str1,str2);
}
}else{
/* reply to subsequent request */
if (!req) req = cscf_get_request_from_reply(msg);
/* destroy dialogs on specific methods */
switch (d->method){
case DLG_METHOD_OTHER:
d->expires = d_act_time()+scscf_dialogs_expiration_time;
break;
case DLG_METHOD_INVITE:
if (req && req->first_line.u.request.method.len==3 &&
strncasecmp(req->first_line.u.request.method.s,"BYE",3)==0){
d->state = DLG_STATE_TERMINATED;
d_unlock(d->hash);
return S_drop_dialog(msg,str1,str2);
}
d->expires = d_act_time()+scscf_dialogs_expiration_time;
break;
case DLG_METHOD_SUBSCRIBE:
// if (req && req->first_line.u.request.method.len==9 &&
// strncasecmp(req->first_line.u.request.method.s,"SUBSCRIBE",9)==0 &&
// cscf_get_expires_hdr(msg)==0){
// d->state = DLG_STATE_TERMINATED;
// d_unlock(d->hash);
// return P_dros_dialog(msg,str1,str2);
// }
if (req && req->first_line.u.request.method.len==6 &&
strncasecmp(req->first_line.u.request.method.s,"NOTIFY",6)==0){
expires = cscf_get_subscription_state(req);
if (expires==0){
d->state = DLG_STATE_TERMINATED;
d_unlock(d->hash);
return S_drop_dialog(msg,str1,str2);
}else if (expires>0){
d->expires = expires;
}
}
break;
}
if (cseq>d->last_cseq) d->last_cseq = cseq;
}
}
d_unlock(d->hash);
// print_s_dialogs(L_INFO);
return CSCF_RETURN_TRUE;
}
