WIP Netlink support for FreeBSD 13.2 and later

NOTE: This is an early subset of the Netlink interface.

Signed-off-by: Yann Dirson <[email protected]>

Author: ydirson

libc-test/build.rs

@@ -1998,6 +1998,7 @@ fn test_freebsd(target: &str) {
                 "netinet/sctp.h",
                 "netinet/tcp.h",
                 "netinet/udp.h",
+                [freebsd13]:"netlink/netlink.h",
                 "poll.h",
                 "pthread.h",
                 "pthread_np.h",
@@ -2222,9 +2223,47 @@ fn test_freebsd(target: &str) {
                 true
             }
 
-            // Added in in FreeBSD 13.0 (r367776 and r367287)
+            // Added in FreeBSD 13.0 (r367776 and r367287)
             "SCM_CREDS2" | "LOCAL_CREDS_PERSISTENT" if Some(13) > freebsd_ver => true,
 
+            // Added in FreeBSD 13.2
+            "SOL_NETLINK"
+            | "NETLINK_ADD_MEMBERSHIP"
+            | "NETLINK_DROP_MEMBERSHIP"
+            | "NETLINK_PKTINFO"
+            | "NETLINK_BROADCAST_ERROR"
+            | "NETLINK_NO_ENOBUFS"
+            | "NETLINK_RX_RING"
+            | "NETLINK_TX_RING"
+            | "NETLINK_LISTEN_ALL_NSID"
+            | "NETLINK_LIST_MEMBERSHIPS"
+            | "NETLINK_CAP_ACK"
+            | "NETLINK_EXT_ACK"
+            | "NETLINK_GET_STRICT_CHK"
+            | "AF_NETLINK"
+            | "PF_NETLINK"
+            | "NETLINK_ROUTE"
+            | "NETLINK_UNUSED"
+            | "NETLINK_USERSOCK"
+            | "NETLINK_FIREWALL"
+            | "NETLINK_SOCK_DIAG"
+            | "NETLINK_NFLOG"
+            | "NETLINK_XFRM"
+            | "NETLINK_SELINUX"
+            | "NETLINK_ISCSI"
+            | "NETLINK_AUDIT"
+            | "NETLINK_FIB_LOOKUP"
+            | "NETLINK_CONNECTOR"
+            | "NETLINK_NETFILTER"
+            | "NETLINK_IP6_FW"
+            | "NETLINK_DNRTMSG"
+            | "NETLINK_KOBJECT_UEVENT"
+            | "NETLINK_GENERIC"
+                if Some(13) > freebsd_ver =>
+            {
+                true
+            }
+
             // Added in FreeBSD 14
             "SPACECTL_DEALLOC" if Some(14) > freebsd_ver => true,
 
@@ -2378,6 +2417,9 @@ fn test_freebsd(target: &str) {
             // `shm_largepage_conf` was introduced in FreeBSD 13.
             "shm_largepage_conf" if Some(13) > freebsd_ver => true,
 
+            // `sockaddr_nl` introduced in FreeBSD 13.2
+            "sockaddr_nl" if Some(13) > freebsd_ver => true,
+
             // Those are private types
             "memory_type" => true,
             "memory_type_list" => true,

src/unix/bsd/freebsdlike/freebsd/mod.rs

@@ -1361,6 +1361,14 @@ s_no_extra_traits! {
         pub sdl_data: [::c_char; 46],
     }
 
+    pub struct sockaddr_nl {
+        pub nl_len: ::c_uchar,
+        pub nl_family: ::sa_family_t,
+        nl_pad: ::c_ushort,
+        pub nl_pid: u32,
+        pub nl_groups: u32
+    }
+
     pub struct mq_attr {
         pub mq_flags: ::c_long,
         pub mq_maxmsg: ::c_long,
@@ -1774,6 +1782,34 @@ cfg_if! {
             }
         }
 
+        impl PartialEq for sockaddr_nl {
+            fn eq(&self, other: &sockaddr_nl) -> bool {
+                self.nl_len == other.nl_len &&
+                    self.nl_family == other.nl_family &&
+                    self.nl_pid == other.nl_pid &&
+                    self.nl_groups == other.nl_groups
+            }
+        }
+        impl Eq for sockaddr_nl {}
+        impl ::fmt::Debug for sockaddr_nl {
+            fn fmt(&self, f: &mut ::fmt::Formatter) -> ::fmt::Result {
+                f.debug_struct("sockaddr_nl")
+                    .field("nl_len", &self.nl_len)
+                    .field("nl_family", &self.nl_family)
+                    .field("nl_pid", &self.nl_pid)
+                    .field("nl_groups", &self.nl_groups)
+                    .finish()
+            }
+        }
+        impl ::hash::Hash for sockaddr_nl {
+            fn hash<H: ::hash::Hasher>(&self, state: &mut H) {
+                self.nl_len.hash(state);
+                self.nl_family.hash(state);
+                self.nl_pid.hash(state);
+                self.nl_groups.hash(state);
+            }
+        }
+
         impl PartialEq for mq_attr {
             fn eq(&self, other: &mq_attr) -> bool {
                 self.mq_flags == other.mq_flags &&
@@ -3027,6 +3063,42 @@ pub const SO_TS_MONOTONIC: ::c_int = 3;
 pub const SO_TS_DEFAULT: ::c_int = SO_TS_REALTIME_MICRO;
 pub const SO_TS_CLOCK_MAX: ::c_int = SO_TS_MONOTONIC;
 
+/// netlink constants
+pub const SOL_NETLINK: ::c_int = 270;
+pub const NETLINK_ADD_MEMBERSHIP: ::c_int = 1;
+pub const NETLINK_DROP_MEMBERSHIP: ::c_int = 2;
+pub const NETLINK_PKTINFO: ::c_int = 3;
+pub const NETLINK_BROADCAST_ERROR: ::c_int = 4;
+pub const NETLINK_NO_ENOBUFS: ::c_int = 5;
+pub const NETLINK_RX_RING: ::c_int = 6;
+pub const NETLINK_TX_RING: ::c_int = 7;
+pub const NETLINK_LISTEN_ALL_NSID: ::c_int = 8;
+pub const NETLINK_LIST_MEMBERSHIPS: ::c_int = 9;
+pub const NETLINK_CAP_ACK: ::c_int = 10;
+pub const NETLINK_EXT_ACK: ::c_int = 11;
+pub const NETLINK_GET_STRICT_CHK: ::c_int = 12;
+
+pub const AF_NETLINK: ::c_int = 38;
+pub const PF_NETLINK: ::c_int = AF_NETLINK;
+
+pub const NETLINK_ROUTE: ::c_int = 0;
+pub const NETLINK_UNUSED: ::c_int = 1;
+pub const NETLINK_USERSOCK: ::c_int = 2;
+pub const NETLINK_FIREWALL: ::c_int = 3;
+pub const NETLINK_SOCK_DIAG: ::c_int = 4;
+pub const NETLINK_NFLOG: ::c_int = 5;
+pub const NETLINK_XFRM: ::c_int = 6;
+pub const NETLINK_SELINUX: ::c_int = 7;
+pub const NETLINK_ISCSI: ::c_int = 8;
+pub const NETLINK_AUDIT: ::c_int = 9;
+pub const NETLINK_FIB_LOOKUP: ::c_int = 10;
+pub const NETLINK_CONNECTOR: ::c_int = 11;
+pub const NETLINK_NETFILTER: ::c_int = 12;
+pub const NETLINK_IP6_FW: ::c_int = 13;
+pub const NETLINK_DNRTMSG: ::c_int = 14;
+pub const NETLINK_KOBJECT_UEVENT: ::c_int = 15;
+pub const NETLINK_GENERIC: ::c_int = 16;
+
 pub const LOCAL_CREDS: ::c_int = 2;
 pub const LOCAL_CREDS_PERSISTENT: ::c_int = 3;
 pub const LOCAL_CONNWAIT: ::c_int = 4;