openflow_input/bsn_port_generation_id

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// This generation ID is changed whenever a port goes link-down.

#version 5
#version 6

struct of_port_desc_prop_bsn_generation_id : of_port_desc_prop_bsn {
    uint16_t type == 0xffff;
    uint16_t length;
    uint32_t experimenter == 0x5c16c7;
    uint32_t exp_type == 1;
    uint64_t generation_id;
};