Method parseBMPv3

Server/src/bmp/parseBMP.cpp:288–344

* Parse v3 BMP header * * \details * v3 has a different header structure and changes the peer * header format. * * \param [in] sock Socket to read the message from */

 * \param [in]  sock        Socket to read the message from
 */
void parseBMP::parseBMPv3(int sock) {
    struct common_hdr_v3 c_hdr = { 0 };

    SELF_DEBUG("Parsing BMP version 3 (rfc7854)");
    if ((Recv(sock, &c_hdr, BMP_HDRv3_LEN, MSG_WAITALL)) != BMP_HDRv3_LEN) {
        throw "ERROR: Cannot read v3 BMP common header.";
    }

    // Change to host order
    bgp::SWAP_BYTES(&c_hdr.len);

    SELF_DEBUG("BMP v3: type = %x len=%d", c_hdr.type, c_hdr.len);

    // Adjust length to remove common header size
    c_hdr.len -= 1 + BMP_HDRv3_LEN;

    if (c_hdr.len > BGP_MAX_MSG_SIZE)
        throw "ERROR: BMP length is larger than max possible BGP size";

    // Parse additional headers based on type
    bmp_type = c_hdr.type;
    bmp_len = c_hdr.len;

    switch (c_hdr.type) {
        case TYPE_ROUTE_MON: // Route monitoring
            SELF_DEBUG("BMP MSG : route monitor");
            parsePeerHdr(sock);
            break;

        case TYPE_STATS_REPORT: // Statistics Report
            SELF_DEBUG("BMP MSG : stats report");
            parsePeerHdr(sock);
            break;

        case TYPE_PEER_UP: // Peer Up notification
        {
            SELF_DEBUG("BMP MSG : peer up");
            parsePeerHdr(sock);

            break;
        }
        case TYPE_PEER_DOWN: // Peer down notification
            SELF_DEBUG("BMP MSG : peer down");
            parsePeerHdr(sock);
            break;

        case TYPE_INIT_MSG:
        case TYPE_TERM_MSG:
            // Allowed
            break;

        default:
            LOG_ERR("ERROR: Unknown BMP message type of %d", c_hdr.type);
            throw "ERROR: BMP message type is not supported";
            break;
    }
}