// errorCEA sends an error answer indicating that the CER failed due to
// an unsupported (acct/auth) application, and includes the AVP that
// caused the failure in the message.
func errorCEA(sm *StateMachine, c diam.Conn, m *diam.Message, cer *smparser.CER, failedAVP *diam.AVP) error {
hostIP, _, err := net.SplitHostPort(c.LocalAddr().String())
if err != nil {
return fmt.Errorf("failed to parse own ip %q: %s", c.LocalAddr(), err)
}
var a *diam.Message
if failedAVP == cer.InbandSecurityID {
a = m.Answer(diam.NoCommonSecurity)
} else {
a = m.Answer(diam.NoCommonApplication)
}
a.Header.CommandFlags |= diam.ErrorFlag
a.NewAVP(avp.OriginHost, avp.Mbit, 0, sm.cfg.OriginHost)
a.NewAVP(avp.OriginRealm, avp.Mbit, 0, sm.cfg.OriginRealm)
a.NewAVP(avp.HostIPAddress, avp.Mbit, 0, datatype.Address(net.ParseIP(hostIP)))
a.NewAVP(avp.VendorID, avp.Mbit, 0, sm.cfg.VendorID)
a.NewAVP(avp.ProductName, 0, 0, sm.cfg.ProductName)
if cer.OriginStateID != nil {
a.AddAVP(cer.OriginStateID)
}
a.NewAVP(avp.FailedAVP, avp.Mbit, 0, &diam.GroupedAVP{
AVP: []*diam.AVP{failedAVP},
})
if sm.cfg.FirmwareRevision != 0 {
a.NewAVP(avp.FirmwareRevision, avp.Mbit, 0, sm.cfg.FirmwareRevision)
}
_, err = a.WriteTo(c)
return err
}
func sendCEA(w io.Writer, m *diam.Message, OriginStateID, AcctApplicationID *diam.AVP) (n int64, err error) {
m.NewAVP(avp.OriginHost, avp.Mbit, 0, datatype.OctetString("srv"))
m.NewAVP(avp.OriginRealm, avp.Mbit, 0, datatype.OctetString("localhost"))
m.NewAVP(avp.HostIPAddress, avp.Mbit, 0, datatype.Address(net.ParseIP("127.0.0.1")))
m.NewAVP(avp.VendorID, avp.Mbit, 0, datatype.Unsigned32(99))
m.NewAVP(avp.ProductName, avp.Mbit, 0, datatype.UTF8String("go-diameter"))
m.AddAVP(OriginStateID)
m.AddAVP(AcctApplicationID)
return m.WriteTo(w)
}