static int _sal_op_send_request_with_contact(SalOp* op, belle_sip_request_t* request,bool_t add_contact) {
belle_sip_client_transaction_t* client_transaction;
belle_sip_provider_t* prov=op->base.root->prov;
belle_sip_uri_t* outbound_proxy=NULL;
belle_sip_header_contact_t* contact;
int result =-1;
belle_sip_uri_t *next_hop_uri=NULL;
if (add_contact) {
contact = sal_op_create_contact(op);
belle_sip_message_set_header(BELLE_SIP_MESSAGE(request),BELLE_SIP_HEADER(contact));
}
_sal_op_add_custom_headers(op, (belle_sip_message_t*)request);
if (!op->dialog || belle_sip_dialog_get_state(op->dialog) == BELLE_SIP_DIALOG_NULL) {
/*don't put route header if dialog is in confirmed state*/
const MSList *elem=sal_op_get_route_addresses(op);
const char *transport;
const char *method=belle_sip_request_get_method(request);
if (elem) {
outbound_proxy=belle_sip_header_address_get_uri((belle_sip_header_address_t*)elem->data);
next_hop_uri=outbound_proxy;
}else{
next_hop_uri=(belle_sip_uri_t*)belle_sip_object_clone((belle_sip_object_t*)belle_sip_request_get_uri(request));
}
transport=belle_sip_uri_get_transport_param(next_hop_uri);
if (transport==NULL){
/*compatibility mode: by default it should be udp as not explicitely set and if no udp listening point is available, then use
* the first available transport*/
if (!belle_sip_uri_is_secure(next_hop_uri)){
if (belle_sip_provider_get_listening_point(prov,"UDP")==0){
if (belle_sip_provider_get_listening_point(prov,"TCP")!=NULL){
transport="tcp";
}else if (belle_sip_provider_get_listening_point(prov,"TLS")!=NULL ){
transport="tls";
}
}
if (transport){
belle_sip_message("Transport is not specified, using %s because UDP is not available.",transport);
belle_sip_uri_set_transport_param(next_hop_uri,transport);
}
}
}
if ((strcmp(method,"REGISTER")==0 || strcmp(method,"SUBSCRIBE")==0) && transport &&
(strcasecmp(transport,"TCP")==0 || strcasecmp(transport,"TLS")==0)){
/*RFC 5923: add 'alias' parameter to tell the server that we want it to keep the connection for future requests*/
belle_sip_header_via_t *via=belle_sip_message_get_header_by_type(BELLE_SIP_MESSAGE(request),belle_sip_header_via_t);
belle_sip_parameters_set_parameter(BELLE_SIP_PARAMETERS(via),"alias",NULL);
}
}
client_transaction = belle_sip_provider_create_client_transaction(prov,request);
belle_sip_transaction_set_application_data(BELLE_SIP_TRANSACTION(client_transaction),sal_op_ref(op));
if (op->pending_client_trans) belle_sip_object_unref(op->pending_client_trans);
op->pending_client_trans=client_transaction; /*update pending inv for being able to cancel*/
belle_sip_object_ref(op->pending_client_trans);
if (belle_sip_message_get_header_by_type(BELLE_SIP_MESSAGE(request),belle_sip_header_user_agent_t)==NULL)
belle_sip_message_add_header(BELLE_SIP_MESSAGE(request),BELLE_SIP_HEADER(op->base.root->user_agent));
if (!belle_sip_message_get_header(BELLE_SIP_MESSAGE(request),BELLE_SIP_AUTHORIZATION)
&& !belle_sip_message_get_header(BELLE_SIP_MESSAGE(request),BELLE_SIP_PROXY_AUTHORIZATION)) {
/*hmm just in case we already have authentication param in cache*/
belle_sip_provider_add_authorization(op->base.root->prov,request,NULL,NULL);
}
result = belle_sip_client_transaction_send_request_to(client_transaction,next_hop_uri/*might be null*/);
/*update call id if not set yet for this OP*/
if (result == 0 && !op->base.call_id) {
op->base.call_id=ms_strdup(belle_sip_header_call_id_get_call_id(BELLE_SIP_HEADER_CALL_ID(belle_sip_message_get_header_by_type(BELLE_SIP_MESSAGE(request), belle_sip_header_call_id_t))));
}
return result;
}
int sal_message_send(SalOp *op, const char *from, const char *to, const char* content_type, const char *msg, const char *peer_uri){
belle_sip_request_t* req;
char content_type_raw[256];
size_t content_length = msg?strlen(msg):0;
time_t curtime = time(NULL);
uint8_t *multipartEncryptedMessage = NULL;
int retval;
if (op->dialog){
/*for SIP MESSAGE that are sent in call's dialog*/
req = belle_sip_dialog_create_queued_request(op->dialog,"MESSAGE");
}else{
sal_op_message_fill_cbs(op);
if (from)
sal_op_set_from(op, from);
if (to)
sal_op_set_to(op, to);
op->dir = SalOpDirOutgoing;
req = sal_op_build_request(op,"MESSAGE");
if (req == NULL ){
return -1;
}
if (sal_op_get_contact_address(op)){
belle_sip_message_add_header(BELLE_SIP_MESSAGE(req), BELLE_SIP_HEADER(sal_op_create_contact(op)));
}
}
/* shall we try to encrypt the message?*/
if ((strcmp(content_type, "xml/cipher") == 0) || ((strcmp(content_type, "application/cipher.vnd.gsma.rcs-ft-http+xml") == 0))) {
/* access the zrtp cache to get keys needed to cipher the message */
LinphoneCore *lc=(LinphoneCore *)sal_get_user_pointer(sal_op_get_sal(op));
FILE *CACHEFD = fopen(lc->zrtp_secrets_cache, "rb+");
if (CACHEFD == NULL) {
ms_warning("Unable to access ZRTP ZID cache to encrypt message");
/*probably not a good idea to do this:*/
sal_error_info_set(&op->error_info, SalReasonNotAcceptable, 488, "Unable to encrypt IM", NULL);
op->base.root->callbacks.text_delivery_update(op,SalTextDeliveryFailed);
return -1;
} else {
size_t cacheSize;
char *cacheString;
xmlDocPtr cacheXml;
int retval;
cacheString=ms_load_file_content(CACHEFD, &cacheSize);
if (!cacheString){
ms_warning("Unable to load content of ZRTP ZID cache to encrypt message");
return -1;
}
cacheString[cacheSize] = '\0';
cacheSize += 1;
fclose(CACHEFD);
cacheXml = xmlParseDoc((xmlChar*)cacheString);
ms_free(cacheString);
retval = lime_createMultipartMessage(cacheXml, (uint8_t *)msg, (uint8_t *)peer_uri, &multipartEncryptedMessage);
if (retval != 0) {
ms_warning("Unable to encrypt message for %s : %s - op [%p]", peer_uri, lime_error_code_to_string(retval), op);
xmlFreeDoc(cacheXml);
free(multipartEncryptedMessage);
/*probably not a good idea to do this:*/
sal_error_info_set(&op->error_info, SalReasonNotAcceptable, 488, "Unable to encrypt IM", NULL);
op->base.root->callbacks.text_delivery_update(op,SalTextDeliveryFailed);
return -1;
} else {
/* dump updated cache to a string */
xmlChar *xmlStringOutput;
int xmlStringLength;
xmlDocDumpFormatMemoryEnc(cacheXml, &xmlStringOutput, &xmlStringLength, "UTF-8", 0);
/* write it to the cache file */
CACHEFD = fopen(lc->zrtp_secrets_cache, "wb+");
if (fwrite(xmlStringOutput, 1, xmlStringLength, CACHEFD)<=0){
ms_warning("Unable to write zid cache");
}
xmlFree(xmlStringOutput);
fclose(CACHEFD);
content_length = strlen((const char *)multipartEncryptedMessage);
}
xmlFreeDoc(cacheXml);
}
}
snprintf(content_type_raw,sizeof(content_type_raw),BELLE_SIP_CONTENT_TYPE ": %s",content_type);
belle_sip_message_add_header(BELLE_SIP_MESSAGE(req),BELLE_SIP_HEADER(belle_sip_header_content_type_parse(content_type_raw)));
belle_sip_message_add_header(BELLE_SIP_MESSAGE(req),BELLE_SIP_HEADER(belle_sip_header_content_length_create(content_length)));
belle_sip_message_add_header(BELLE_SIP_MESSAGE(req),BELLE_SIP_HEADER(belle_sip_header_date_create_from_time(&curtime)));
belle_sip_message_set_body(BELLE_SIP_MESSAGE(req),(multipartEncryptedMessage==NULL)?msg:(const char *)multipartEncryptedMessage,content_length);
retval = sal_op_send_request(op,req);
free(multipartEncryptedMessage);
return retval;
}