Add LINK_STATE_* definitions to NetBSD and OpenBSD.

Author: pusateri

src/unix/bsd/netbsdlike/netbsd/mod.rs

@@ -1393,7 +1393,15 @@ pub const LOCAL_CONNWAIT: c_int = 0x0002; // connects block until accepted
 pub const LOCAL_PEEREID: c_int = 0x0003; // get peer identification
 pub const LOCAL_CREDS: c_int = 0x0004; // pass credentials to receiver
 
-// https://github.com/NetBSD/src/blob/trunk/sys/net/if.h#L373
+// https://github.com/NetBSD/src/blob/trunk/sys/net/if.h#L207
+/// link invalid/unknown
+pub const LINK_STATE_UNKNOWN: c_int = 0;
+/// link is down
+pub const LINK_STATE_DOWN: c_int = 1;
+/// link is up
+pub const LINK_STATE_UP: c_int = 2;
+
+// https://github.com/NetBSD/src/blob/trunk/sys/net/if.h#L445
 pub const IFF_UP: c_int = 0x0001; // interface is up
 pub const IFF_BROADCAST: c_int = 0x0002; // broadcast address valid
 pub const IFF_DEBUG: c_int = 0x0004; // turn on debugging

src/unix/bsd/netbsdlike/openbsd/mod.rs

@@ -1629,6 +1629,22 @@ const SI_PAD: size_t = (SI_MAXSZ / size_of::<c_int>()) - 3;
 pub const MAP_STACK: c_int = 0x4000;
 pub const MAP_CONCEAL: c_int = 0x8000;
 
+// https://github.com/openbsd/src/blob/HEAD/sys/net/if.h#L135
+/// link unknown
+pub const LINK_STATE_UNKNOWN: c_int = 0;
+/// link invalid
+pub const LINK_STATE_INVALID: c_int = 1;
+/// link is down
+pub const LINK_STATE_DOWN: c_int = 2;
+/// keepalive reports down
+pub const LINK_STATE_KALIVE_DOWN: c_int = 3;
+/// link is up
+pub const LINK_STATE_UP: c_int = 4;
+/// link is up and half duplex
+pub const LINK_STATE_HALF_DUPLEX: c_int = 5;
+/// link is up and full duplex
+pub const LINK_STATE_FULL_DUPLEX: c_int = 6;
+
 // https://github.com/openbsd/src/blob/HEAD/sys/net/if.h#L187
 pub const IFF_UP: c_int = 0x1; // interface is up
 pub const IFF_BROADCAST: c_int = 0x2; // broadcast address valid