resip发送含有自定义字段的Notify消息

char* txt =
  "Messages-Waiting: no\r\n"
  "Message-Account: sip:7012@192.168.101.101\r\n"
  "Voice-Message: 2/8 (0/2)";

SharedPtr notify = dum->makeOutOfDialogRequest
  (uasAor, NOTIFY, new testAppDialogSet(*dum, "UAC(NOTIFY)"));
notify->header(resip::h_Event).value() = "message-summary";
Mime type("application", "simple-message-summary");

HeaderFieldValue hfv(txt, strlen(txt));
GenericContents contents(&hfv, type);
notify->setContents(&contents);
dum->send(notify);