ofp_header

gistfile1.c

struct ofp_header {
    uint8_t version;	/* OFP_VERSION. */
    uint8_t type;       /* One of the OFPT_ constants. */
    uint16_t length;    /* Length including this ofp_header. */
    uint32_t xid;       /* Transaction id associated with this packet. 
                           Replies use the same id as was in the request
                           to facilitate pairing. */
}
OFP_ASSERT(sizeof(struct ofp_header) == 8);