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sys/netlink/route/interface.h

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/*
* Interface-related (RTM_<NEW|DEL|GET|SET>LINK) message header and attributes.
*/
#ifndef _NETLINK_ROUTE_INTERFACE_H_
#define _NETLINK_ROUTE_INTERFACE_H_
/* Base header for all of the relevant messages */
struct ifinfomsg {
unsigned char ifi_family; /* not used */
unsigned char __ifi_pad;
unsigned short ifi_type; /* ARPHRD_* */
int ifi_index; /* Inteface index */
unsigned ifi_flags; /* IFF_* flags */
unsigned ifi_change; /* IFF_* change mask */
};
#ifndef _KERNEL
/* Compatilbility helpers */
#define _IFINFO_HDRLEN ((int)sizeof(struct ifinfomsg))
#define IFLA_RTA(_ifi) ((struct rtattr *)NL_ITEM_DATA(_ifi, _IFINFO_HDRLEN))
#define IFLA_PAYLOAD(_ifi) NLMSG_PAYLOAD(_ifi, _IFINFO_HDRLEN)
#endif
enum {
IFLA_UNSPEC = 0,
IFLA_ADDRESS = 1, /* binary: Link-level address (MAC) */
#define IFLA_ADDRESS IFLA_ADDRESS
IFLA_BROADCAST = 2, /* binary: link-level broadcast address */
#define IFLA_BROADCAST IFLA_BROADCAST
IFLA_IFNAME = 3, /* string: Interface name */
#define IFLA_IFNAME IFLA_IFNAME
IFLA_MTU = 4, /* u32: Current interface L3 mtu */
#define IFLA_MTU IFLA_MTU
IFLA_LINK = 5, /* not supported */
#define IFLA_LINK IFLA_LINK
IFLA_QDISC = 6, /* string: Queing policy (not supported) */
#define IFLA_QDISC IFLA_QDISC
IFLA_STATS = 7, /* Interface counters */
#define IFLA_STATS IFLA_STATS
IFLA_COST = 8, /* not supported */
#define IFLA_COST IFLA_COST
IFLA_PRIORITY = 9, /* not supported */
#define IFLA_PRIORITY IFLA_PRIORITY
IFLA_MASTER = 10, /* u32: parent interface ifindex */
#define IFLA_MASTER IFLA_MASTER
IFLA_WIRELESS = 11, /* not supported */
#define IFLA_WIRELESS IFLA_WIRELESS
IFLA_PROTINFO = 12, /* protocol-specific data */
#define IFLA_PROTINFO IFLA_PROTINFO
IFLA_TXQLEN = 13, /* u32: transmit queue length */
#define IFLA_TXQLEN IFLA_TXQLEN
IFLA_MAP = 14, /* not supported */
#define IFLA_MAP IFLA_MAP
IFLA_WEIGHT = 15, /* not supported */
#define IFLA_WEIGHT IFLA_WEIGHT
impUnsubmitted
Not Done
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why the #defines here?
It is an odd construct.

imp: why the #defines here? It is an odd construct.
emasteUnsubmitted
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I assume it is so that these can be an enum as they ought to be, but also allowing #ifdef IFLA_ADDRESS

emaste: I assume it is so that these can be an enum as they ought to be, but also allowing `#ifdef…
melifaroAuthorUnsubmitted
Done
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In Linux world there are many variations of kernel/userland version and "old kernel, new userland" is not uncommon. Some software like iproute2 explicitly check for the definitions of certain message/attributest to ensure that the behaviour/functionality is supported.
I agree, it indeed looks weird and I'd rather prefer this (and a bunch of there enum) functionality to embedded in the C standard, but we have what we have ATM.

melifaro: In Linux world there are many variations of kernel/userland version and "old kernel, new…
IFLA_OPERSTATE = 16, /* u8: ifOperStatus per RFC 2863 */
#define IFLA_OPERSTATE IFLA_OPERSTATE
IFLA_LINKMODE = 17, /* u8: ifmedia (not supported) */
#define IFLA_LINKMODE IFLA_LINKMODE
IFLA_LINKINFO = 18, /* not supported */
#define IFLA_LINKINFO IFLA_LINKINFO
IFLA_NET_NS_PID = 19, /* u32: vnet id (not supported) */
#define IFLA_NET_NS_PID IFLA_NET_NS_PID
IFLA_IFALIAS = 20, /* not supported */
#define IFLA_IFALIAS IFLA_IFALIAS
IFLA_NUM_VF = 21, /* not supported */
#define IFLA_NUM_VF IFLA_NUM_VF
IFLA_VFINFO_LIST= 22, /* not supported */
#define IFLA_VFINFO_LIST IFLA_VFINFO_LIST
IFLA_STATS64 = 23, /* rtnl_link_stats64: iface stats */
#define IFLA_STATS64 IFLA_STATS64
IFLA_VF_PORTS,
IFLA_PORT_SELF,
IFLA_AF_SPEC,
IFLA_GROUP, /* Group the device belongs to */
IFLA_NET_NS_FD,
IFLA_EXT_MASK, /* Extended info mask, VFs, etc */
IFLA_PROMISCUITY, /* Promiscuity count: > 0 means acts PROMISC */
#define IFLA_PROMISCUITY IFLA_PROMISCUITY
IFLA_NUM_TX_QUEUES,
IFLA_NUM_RX_QUEUES,
IFLA_CARRIER,
IFLA_PHYS_PORT_ID,
IFLA_CARRIER_CHANGES,
IFLA_PHYS_SWITCH_ID,
IFLA_LINK_NETNSID,
IFLA_PHYS_PORT_NAME,
IFLA_PROTO_DOWN,
IFLA_GSO_MAX_SEGS,
IFLA_GSO_MAX_SIZE,
IFLA_PAD,
IFLA_XDP,
IFLA_EVENT,
IFLA_NEW_NETNSID,
IFLA_IF_NETNSID,
IFLA_TARGET_NETNSID = IFLA_IF_NETNSID, /* new alias */
IFLA_CARRIER_UP_COUNT,
IFLA_CARRIER_DOWN_COUNT,
IFLA_NEW_IFINDEX,
IFLA_MIN_MTU,
IFLA_MAX_MTU,
IFLA_PROP_LIST,
IFLA_ALT_IFNAME, /* Alternative ifname */
IFLA_PERM_ADDRESS,
IFLA_PROTO_DOWN_REASON,
__IFLA_MAX
};
#define IFLA_MAX (__IFLA_MAX - 1)
/*
* Attributes that can be used as filters:
* IFLA_IFNAME, IFLA_GROUP, IFLA_ALT_IFNAME
* Headers that can be used as filters:
* ifi_index, ifi_type
*/
/*
* IFLA_OPERSTATE.
* The values below represent the possible
* states of ifOperStatus defined by RFC 2863
*/
enum {
IF_OPER_UNKNOWN = 0, /* status can not be determined */
IF_OPER_NOTPRESENT = 1, /* some (hardware) component not present */
IF_OPER_DOWN = 2, /* down */
IF_OPER_LOWERLAYERDOWN = 3, /* some lower-level interface is down */
IF_OPER_TESTING = 4, /* in some test mode */
IF_OPER_DORMANT = 5, /* "up" but waiting for some condition (802.1X) */
IF_OPER_UP = 6, /* ready to pass packets */
};
/* IFLA_STATS */
struct rtnl_link_stats {
uint32_t rx_packets; /* total RX packets (IFCOUNTER_IPACKETS) */
uint32_t tx_packets; /* total TX packets (IFCOUNTER_OPACKETS) */
uint32_t rx_bytes; /* total RX bytes (IFCOUNTER_IBYTES) */
uint32_t tx_bytes; /* total TX bytes (IFCOUNTER_OBYTES) */
uint32_t rx_errors; /* RX errors (IFCOUNTER_IERRORS) */
uint32_t tx_errors; /* RX errors (IFCOUNTER_OERRORS) */
uint32_t rx_dropped; /* RX drop (no space in ring/no bufs) (IFCOUNTER_IQDROPS) */
uint32_t tx_dropped; /* TX drop (IFCOUNTER_OQDROPS) */
uint32_t multicast; /* RX multicast packets (IFCOUNTER_IMCASTS) */
uint32_t collisions; /* not supported */
uint32_t rx_length_errors; /* not supported */
uint32_t rx_over_errors; /* not supported */
uint32_t rx_crc_errors; /* not supported */
uint32_t rx_frame_errors; /* not supported */
uint32_t rx_fifo_errors; /* not supported */
uint32_t rx_missed_errors; /* not supported */
uint32_t tx_aborted_errors; /* not supported */
uint32_t tx_carrier_errors; /* not supported */
uint32_t tx_fifo_errors; /* not supported */
uint32_t tx_heartbeat_errors; /* not supported */
uint32_t tx_window_errors; /* not supported */
uint32_t rx_compressed; /* not supported */
uint32_t tx_compressed; /* not supported */
uint32_t rx_nohandler; /* dropped due to no proto handler (IFCOUNTER_NOPROTO) */
};
/* IFLA_STATS64 */
struct rtnl_link_stats64 {
uint64_t rx_packets; /* total RX packets (IFCOUNTER_IPACKETS) */
uint64_t tx_packets; /* total TX packets (IFCOUNTER_OPACKETS) */
uint64_t rx_bytes; /* total RX bytes (IFCOUNTER_IBYTES) */
uint64_t tx_bytes; /* total TX bytes (IFCOUNTER_OBYTES) */
uint64_t rx_errors; /* RX errors (IFCOUNTER_IERRORS) */
uint64_t tx_errors; /* RX errors (IFCOUNTER_OERRORS) */
uint64_t rx_dropped; /* RX drop (no space in ring/no bufs) (IFCOUNTER_IQDROPS) */
uint64_t tx_dropped; /* TX drop (IFCOUNTER_OQDROPS) */
uint64_t multicast; /* RX multicast packets (IFCOUNTER_IMCASTS) */
uint64_t collisions; /* not supported */
uint64_t rx_length_errors; /* not supported */
uint64_t rx_over_errors; /* not supported */
uint64_t rx_crc_errors; /* not supported */
uint64_t rx_frame_errors; /* not supported */
uint64_t rx_fifo_errors; /* not supported */
uint64_t rx_missed_errors; /* not supported */
uint64_t tx_aborted_errors; /* not supported */
uint64_t tx_carrier_errors; /* not supported */
uint64_t tx_fifo_errors; /* not supported */
uint64_t tx_heartbeat_errors; /* not supported */
uint64_t tx_window_errors; /* not supported */
uint64_t rx_compressed; /* not supported */
uint64_t tx_compressed; /* not supported */
uint64_t rx_nohandler; /* dropped due to no proto handler (IFCOUNTER_NOPROTO) */
};
#endif