BgpUpdateMessage¶

//
// Represents a BGPv4 UPDATE message.
//
// see RFC 4271 Section 4.3
//
class BgpUpdateMessage extends BgpHeader
{
    type = BGP_UPDATE;
    chunkLength = BGP_HEADER_OCTETS + BGP_EMPTY_UPDATE_OCTETS;
    totalLength = (BGP_HEADER_OCTETS + BGP_EMPTY_UPDATE_OCTETS).get<B>();

    uint16_t withDrawnRoutesLength = 0;    // This 2-octets unsigned integer indicates the total length of
                                           // the Withdrawn Routes field in octets.  Its value allows the
                                           // length of the Network Layer Reachability Information field to
                                           // be determined, as specified below.
                                           //
                                           // A value of 0 indicates that no routes are being withdrawn from
                                           // service, and that the WITHDRAWN ROUTES field is not present in
                                           // this UPDATE message.

    BgpUpdateWithdrawnRoutes withdrawnRoutes[];
    uint16_t totalPathAttributeLength = 0;    // This 2-octets unsigned integer indicates the total length of
                                              // Path Attributes field in octets.  Its value allows the length
                                              // of the Network Layer Reachability field to be determined as
                                              // specified below.
                                              //
                                              // A value of 0 indicates that neither the Network Layer
                                              // Reachability Information field nor the Path Attribute field is
                                              // present in this UPDATE message.
    BgpUpdatePathAttributes* pathAttributes[] @owned @allowReplace;
    BgpUpdateNlri nlri[];
}