static void handle_sdp_from_response(SalOp* op,belle_sip_response_t* response) {
belle_sdp_session_description_t* sdp;
if ((sdp=belle_sdp_session_description_create(BELLE_SIP_MESSAGE(response)))) {
op->base.remote_media=sal_media_description_new();
sdp_to_media_description(sdp,op->base.remote_media);
if (op->base.local_media) sdp_process(op);
}
}
static void process_sdp_for_invite(SalOp* op,belle_sip_request_t* invite) {
belle_sdp_session_description_t* sdp;
if ((sdp=belle_sdp_session_description_create(BELLE_SIP_MESSAGE(invite)))) {
op->sdp_offering=FALSE;
op->base.remote_media=sal_media_description_new();
sdp_to_media_description(sdp,op->base.remote_media);
belle_sip_object_unref(sdp);
}else
op->sdp_offering=TRUE;
}
static void handle_sdp_from_response(SalOp* op,belle_sip_response_t* response) {
belle_sdp_session_description_t* sdp;
SalReason reason;
if (op->base.remote_media){
sal_media_description_unref(op->base.remote_media);
op->base.remote_media=NULL;
}
if (extract_sdp(op,BELLE_SIP_MESSAGE(response),&sdp,&reason)==0) {
if (sdp){
op->base.remote_media=sal_media_description_new();
sdp_to_media_description(sdp,op->base.remote_media);
}/*if no sdp in response, what can we do ?*/
}
/* process sdp in any case to reset result media description*/
if (op->base.local_media) sdp_process(op);
}
static int process_sdp_for_invite(SalOp* op,belle_sip_request_t* invite) {
belle_sdp_session_description_t* sdp;
int err=0;
SalReason reason;
if (extract_sdp(op,BELLE_SIP_MESSAGE(invite),&sdp,&reason)==0) {
if (sdp){
op->sdp_offering=FALSE;
op->base.remote_media=sal_media_description_new();
sdp_to_media_description(sdp,op->base.remote_media);
/*make some sanity check about the SDP received*/
if (!is_media_description_acceptable(op->base.remote_media)){
err=-1;
reason=SalReasonNotAcceptable;
}
belle_sip_object_unref(sdp);
}else op->sdp_offering=TRUE; /*INVITE without SDP*/
}else err=-1;
if (err==-1){
sal_call_decline(op,reason,NULL);
}
return err;
}
static void process_request_event(void *op_base, const belle_sip_request_event_t *event) {
SalOp* op = (SalOp*)op_base;
belle_sip_server_transaction_t* server_transaction=NULL;
belle_sdp_session_description_t* sdp;
belle_sip_request_t* req = belle_sip_request_event_get_request(event);
belle_sip_dialog_state_t dialog_state;
belle_sip_response_t* resp;
belle_sip_header_t* call_info;
const char *method=belle_sip_request_get_method(req);
bool_t is_update=FALSE;
if (strcmp("ACK",method)!=0){ /*ACK does'nt create srv transaction*/
server_transaction = belle_sip_provider_create_server_transaction(op->base.root->prov,belle_sip_request_event_get_request(event));
belle_sip_object_ref(server_transaction);
belle_sip_transaction_set_application_data(BELLE_SIP_TRANSACTION(server_transaction),sal_op_ref(op));
}
if (strcmp("INVITE",method)==0) {
if (op->pending_server_trans) belle_sip_object_unref(op->pending_server_trans);
/*updating pending invite transaction*/
op->pending_server_trans=server_transaction;
belle_sip_object_ref(op->pending_server_trans);
}
if (strcmp("UPDATE",method)==0) {
if (op->pending_update_server_trans) belle_sip_object_unref(op->pending_update_server_trans);
/*updating pending update transaction*/
op->pending_update_server_trans=server_transaction;
belle_sip_object_ref(op->pending_update_server_trans);
}
if (!op->dialog) {
set_or_update_dialog(op,belle_sip_provider_create_dialog(op->base.root->prov,BELLE_SIP_TRANSACTION(op->pending_server_trans)));
ms_message("new incoming call from [%s] to [%s]",sal_op_get_from(op),sal_op_get_to(op));
}
dialog_state=belle_sip_dialog_get_state(op->dialog);
switch(dialog_state) {
case BELLE_SIP_DIALOG_NULL: {
if (strcmp("INVITE",method)==0) {
if (!op->replaces && (op->replaces=belle_sip_message_get_header_by_type(BELLE_SIP_MESSAGE(req),belle_sip_header_replaces_t))) {
belle_sip_object_ref(op->replaces);
} else if(op->replaces) {
ms_warning("replace header already set");
}
if (process_sdp_for_invite(op,req) == 0) {
if ((call_info=belle_sip_message_get_header(BELLE_SIP_MESSAGE(req),"Call-Info"))) {
if( strstr(belle_sip_header_get_unparsed_value(call_info),"answer-after=") != NULL) {
op->auto_answer_asked=TRUE;
ms_message("The caller asked to automatically answer the call(Emergency?)\n");
}
}
op->base.root->callbacks.call_received(op);
}
break;
} /* else same behavior as for EARLY state*/
}
case BELLE_SIP_DIALOG_EARLY: {
//hmm probably a cancel
if (strcmp("CANCEL",method)==0) {
if(belle_sip_request_event_get_server_transaction(event)) {
/*first answer 200 ok to cancel*/
belle_sip_server_transaction_send_response(server_transaction
,sal_op_create_response_from_request(op,req,200));
/*terminate invite transaction*/
call_terminated(op
,op->pending_server_trans
,belle_sip_transaction_get_request(BELLE_SIP_TRANSACTION(op->pending_server_trans)),487);
} else {
/*call leg does not exist*/
belle_sip_server_transaction_send_response(server_transaction
,sal_op_create_response_from_request(op,req,481));
}
} else if (strcmp("PRACK",method)==0) {
resp=sal_op_create_response_from_request(op,req,200);
belle_sip_server_transaction_send_response(server_transaction,resp);
} else if (strcmp("UPDATE",method)==0) {
sal_op_reset_descriptions(op);
if (process_sdp_for_invite(op,req)==0)
op->base.root->callbacks.call_updating(op,TRUE);
} else {
belle_sip_error("Unexpected method [%s] for dialog state BELLE_SIP_DIALOG_EARLY",belle_sip_request_get_method(req));
unsupported_method(server_transaction,req);
}
break;
}
case BELLE_SIP_DIALOG_CONFIRMED:
/*great ACK received*/
if (strcmp("ACK",method)==0) {
if (op->sdp_offering){
SalReason reason;
if (extract_sdp(op,BELLE_SIP_MESSAGE(req),&sdp,&reason)==0){
if (sdp){
if (op->base.remote_media)
sal_media_description_unref(op->base.remote_media);
op->base.remote_media=sal_media_description_new();
sdp_to_media_description(sdp,op->base.remote_media);
sdp_process(op);
belle_sip_object_unref(sdp);
}else{
ms_warning("SDP expected in ACK but not found.");
}
}
}
op->base.root->callbacks.call_ack(op);
} else if(strcmp("BYE",method)==0) {
resp=sal_op_create_response_from_request(op,req,200);
belle_sip_server_transaction_send_response(server_transaction,resp);
op->base.root->callbacks.call_terminated(op,op->dir==SalOpDirIncoming?sal_op_get_from(op):sal_op_get_to(op));
op->state=SalOpStateTerminating;
/*call end not notified by dialog deletion because transaction can end before dialog*/
} else if(strcmp("INVITE",method)==0 || (is_update=(strcmp("UPDATE",method)==0)) ) {
if (is_update && !belle_sip_message_get_body(BELLE_SIP_MESSAGE(req))) {
/*session timer case*/
/*session expire should be handled. to be done when real session timer (rfc4028) will be implemented*/
resp=sal_op_create_response_from_request(op,req,200);
belle_sip_server_transaction_send_response(server_transaction,resp);
belle_sip_object_unref(op->pending_update_server_trans);
op->pending_update_server_trans=NULL;
} else {
/*re-invite*/
sal_op_reset_descriptions(op);
if (process_sdp_for_invite(op,req)==0)
op->base.root->callbacks.call_updating(op,is_update);
}
} else if (strcmp("INFO",method)==0){
if (belle_sip_message_get_body(BELLE_SIP_MESSAGE(req))
&& strstr(belle_sip_message_get_body(BELLE_SIP_MESSAGE(req)),"picture_fast_update")) {
/*vfu request*/
ms_message("Receiving VFU request on op [%p]",op);
if (op->base.root->callbacks.vfu_request){
op->base.root->callbacks.vfu_request(op);
}
}else{
SalBody salbody;
if (sal_op_get_body(op,(belle_sip_message_t*)req,&salbody)) {
if (sal_body_has_type(&salbody,"application","dtmf-relay")){
char tmp[10];
if (sal_lines_get_value(salbody.data, "Signal",tmp, sizeof(tmp))){
op->base.root->callbacks.dtmf_received(op,tmp[0]);
}
}else
op->base.root->callbacks.info_received(op,&salbody);
} else {
op->base.root->callbacks.info_received(op,NULL);
}
}
resp=sal_op_create_response_from_request(op,req,200);
belle_sip_server_transaction_send_response(server_transaction,resp);
}else if (strcmp("REFER",method)==0) {
sal_op_process_refer(op,event,server_transaction);
} else if (strcmp("NOTIFY",method)==0) {
sal_op_call_process_notify(op,event,server_transaction);
} else if (strcmp("OPTIONS",method)==0) {
resp=sal_op_create_response_from_request(op,req,200);
belle_sip_server_transaction_send_response(server_transaction,resp);
} else if (strcmp("CANCEL",method)==0) {
/*call leg does not exist because 200ok already sent*/
belle_sip_server_transaction_send_response(server_transaction,sal_op_create_response_from_request(op,req,481));
} else if (strcmp("MESSAGE",method)==0){
sal_process_incoming_message(op,event);
}else{
ms_error("unexpected method [%s] for dialog [%p]",belle_sip_request_get_method(req),op->dialog);
unsupported_method(server_transaction,req);
}
break;
default:
ms_error("unexpected dialog state [%s]",belle_sip_dialog_state_to_string(dialog_state));
break;
}
if (server_transaction) belle_sip_object_unref(server_transaction);
}
static void process_request_event(void *op_base, const belle_sip_request_event_t *event) {
SalOp* op = (SalOp*)op_base;
belle_sip_server_transaction_t* server_transaction=NULL;
belle_sdp_session_description_t* sdp;
belle_sip_request_t* req = belle_sip_request_event_get_request(event);
belle_sip_dialog_state_t dialog_state;
belle_sip_response_t* resp;
belle_sip_header_t* call_info;
if (strcmp("ACK",belle_sip_request_get_method(req))!=0){ /*ACK does'nt create srv transaction*/
server_transaction = belle_sip_provider_create_server_transaction(op->base.root->prov,belle_sip_request_event_get_request(event));
belle_sip_object_ref(server_transaction);
belle_sip_transaction_set_application_data(BELLE_SIP_TRANSACTION(server_transaction),op);
sal_op_ref(op);
}
if (strcmp("INVITE",belle_sip_request_get_method(req))==0) {
if (op->pending_server_trans) belle_sip_object_unref(op->pending_server_trans);
/*updating pending invite transaction*/
op->pending_server_trans=server_transaction;
belle_sip_object_ref(op->pending_server_trans);
}
if (!op->dialog) {
set_or_update_dialog(op,belle_sip_provider_create_dialog(op->base.root->prov,BELLE_SIP_TRANSACTION(op->pending_server_trans)));
ms_message("new incoming call from [%s] to [%s]",sal_op_get_from(op),sal_op_get_to(op));
}
dialog_state=belle_sip_dialog_get_state(op->dialog);
switch(dialog_state) {
case BELLE_SIP_DIALOG_NULL: {
if (strcmp("INVITE",belle_sip_request_get_method(req))==0) {
if (!op->replaces && (op->replaces=belle_sip_message_get_header_by_type(BELLE_SIP_MESSAGE(req),belle_sip_header_replaces_t))) {
belle_sip_object_ref(op->replaces);
} else if(op->replaces) {
ms_warning("replace header already set");
}
process_sdp_for_invite(op,req);
if ((call_info=belle_sip_message_get_header(BELLE_SIP_MESSAGE(req),"Call-Info"))) {
if( strstr(belle_sip_header_extension_get_value(BELLE_SIP_HEADER_EXTENSION(call_info)),"answer-after=") != NULL) {
op->auto_answer_asked=TRUE;
ms_message("The caller asked to automatically answer the call(Emergency?)\n");
}
}
op->base.root->callbacks.call_received(op);
break;
} /* else same behavior as for EARLY state*/
}
case BELLE_SIP_DIALOG_EARLY: {
//hmm probably a cancel
if (strcmp("CANCEL",belle_sip_request_get_method(req))==0) {
if(belle_sip_request_event_get_server_transaction(event)) {
/*first answer 200 ok to cancel*/
belle_sip_server_transaction_send_response(server_transaction
,sal_op_create_response_from_request(op,req,200));
/*terminate invite transaction*/
call_terminated(op
,op->pending_server_trans
,belle_sip_transaction_get_request(BELLE_SIP_TRANSACTION(op->pending_server_trans)),487);
} else {
/*call leg does not exist*/
belle_sip_server_transaction_send_response(server_transaction
,sal_op_create_response_from_request(op,req,481));
}
} else if (strcmp("PRACK",belle_sip_request_get_method(req))==0) {
resp=sal_op_create_response_from_request(op,req,200);
belle_sip_server_transaction_send_response(server_transaction,resp);
} else {
belle_sip_error("Unexpected method [%s] for dialog state BELLE_SIP_DIALOG_EARLY",belle_sip_request_get_method(req));
unsupported_method(server_transaction,req);
}
break;
}
case BELLE_SIP_DIALOG_CONFIRMED:
/*great ACK received*/
if (strcmp("ACK",belle_sip_request_get_method(req))==0) {
if (op->sdp_offering){
if ((sdp=belle_sdp_session_description_create(BELLE_SIP_MESSAGE(req)))){
if (op->base.remote_media)
sal_media_description_unref(op->base.remote_media);
op->base.remote_media=sal_media_description_new();
sdp_to_media_description(sdp,op->base.remote_media);
sdp_process(op);
belle_sip_object_unref(sdp);
}
}
/*FIXME
if (op->reinvite){
op->reinvite=FALSE;
}*/
op->base.root->callbacks.call_ack(op);
} else if(strcmp("BYE",belle_sip_request_get_method(req))==0) {
resp=sal_op_create_response_from_request(op,req,200);
belle_sip_server_transaction_send_response(server_transaction,resp);
op->base.root->callbacks.call_terminated(op,op->dir==SalOpDirIncoming?sal_op_get_from(op):sal_op_get_to(op));
op->state=SalOpStateTerminating;
/*call end not notified by dialog deletion because transaction can end before dialog*/
} else if(strcmp("INVITE",belle_sip_request_get_method(req))==0) {
/*re-invite*/
if (op->base.remote_media){
sal_media_description_unref(op->base.remote_media);
op->base.remote_media=NULL;
}
if (op->result){
sal_media_description_unref(op->result);
op->result=NULL;
}
process_sdp_for_invite(op,req);
op->base.root->callbacks.call_updating(op);
} else if (strcmp("INFO",belle_sip_request_get_method(req))==0){
if (belle_sip_message_get_body(BELLE_SIP_MESSAGE(req))
&& strstr(belle_sip_message_get_body(BELLE_SIP_MESSAGE(req)),"picture_fast_update")) {
/*vfu request*/
ms_message("Receiving VFU request on op [%p]",op);
if (op->base.root->callbacks.vfu_request){
op->base.root->callbacks.vfu_request(op);
}
}else{
SalBody salbody;
if (sal_op_get_body(op,(belle_sip_message_t*)req,&salbody)) {
op->base.root->callbacks.info_received(op,&salbody);
} else {
op->base.root->callbacks.info_received(op,NULL);
}
}
resp=sal_op_create_response_from_request(op,req,200);
belle_sip_server_transaction_send_response(server_transaction,resp);
}else if (strcmp("REFER",belle_sip_request_get_method(req))==0) {
sal_op_process_refer(op,event,server_transaction);
} else if (strcmp("NOTIFY",belle_sip_request_get_method(req))==0) {
sal_op_call_process_notify(op,event,server_transaction);
} else if (strcmp("OPTIONS",belle_sip_request_get_method(req))==0) {
resp=sal_op_create_response_from_request(op,req,200);
belle_sip_server_transaction_send_response(server_transaction,resp);
} else if (strcmp("CANCEL",belle_sip_request_get_method(req))==0) {
/*call leg does not exist because 200ok already sent*/
belle_sip_server_transaction_send_response( server_transaction
,sal_op_create_response_from_request(op,req,481));
} else{
ms_error("unexpected method [%s] for dialog [%p]",belle_sip_request_get_method(req),op->dialog);
unsupported_method(server_transaction,req);
}
break;
default: {
ms_error("unexpected dialog state [%s]",belle_sip_dialog_state_to_string(dialog_state));
}
/* no break */
}
if (server_transaction) belle_sip_object_unref(server_transaction);
}
