This section talks about generic OpenFlow structures that are used by the controller and switch while processing OpenFlow messages.
This section describes the port structures defined in the OpenFlow specification:
/* Description of a port */
struct ofp_port {
uint32_t port_no; /* Unique identity of port */
uint16_t length;
uint8_t pad[2];
uint8_t hw_addr[OFP_ETH_ALEN]; /* mac addr field */
uint8_t pad2[2]; /* Align to 64 bits. */
char name[OFP_MAX_PORT_NAME_LEN]; /* Null-terminated name field*/
uint32_t config; /* Bitmap of OFPPC_* flags. */
uint32_t state; /* Bitmap of OFPPS_* flags. */
/* Port description property list - 0 or more properties */
struct ofp_port_desc_prop_header properties[0];
};The port_no field uses the following convention:
/* Port numbering. Ports are numbered starting from 1. */
enum ofp_port_no {
/* Maximum number of physical and logical switch...