diff --git a/libc-test/build.rs b/libc-test/build.rs
index c6925c8dd5ea6..726c3b4735917 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -1953,6 +1953,11 @@ fn test_freebsd(target: &str) {
     // Required for making freebsd11_stat available in the headers
     cfg.define("_WANT_FREEBSD11_STAT", None);
 
+    let freebsd12 = match freebsd_ver {
+        Some(n) if n >= 12 => true,
+        _ => false,
+    };
+
     let freebsd13 = match freebsd_ver {
         Some(n) if n >= 13 => true,
         _ => false,
@@ -1999,6 +2004,8 @@ fn test_freebsd(target: &str) {
                 "netinet/tcp.h",
                 "netinet/udp.h",
                 [freebsd13]:"netlink/netlink.h",
+                [freebsd13]:"netlink/netlink_generic.h",
+                [freebsd12]:"pcap/nflog.h",
                 "poll.h",
                 "pthread.h",
                 "pthread_np.h",
@@ -2227,7 +2234,9 @@ fn test_freebsd(target: &str) {
             "SCM_CREDS2" | "LOCAL_CREDS_PERSISTENT" if Some(13) > freebsd_ver => true,
 
             // Added in FreeBSD 13.2
-            "SOL_NETLINK"
+            "AF_NETLINK"
+            | "PF_NETLINK"
+            | "SOL_NETLINK"
             | "NETLINK_ADD_MEMBERSHIP"
             | "NETLINK_DROP_MEMBERSHIP"
             | "NETLINK_PKTINFO"
@@ -2240,8 +2249,27 @@ fn test_freebsd(target: &str) {
             | "NETLINK_CAP_ACK"
             | "NETLINK_EXT_ACK"
             | "NETLINK_GET_STRICT_CHK"
-            | "AF_NETLINK"
-            | "PF_NETLINK"
+            | "NLM_F_REQUEST"
+            | "NLM_F_MULTI"
+            | "NLM_F_ACK"
+            | "NLM_F_ECHO"
+            | "NLM_F_DUMP_INTR"
+            | "NLM_F_DUMP_FILTERED"
+            | "NLM_F_ROOT"
+            | "NLM_F_MATCH"
+            | "NLM_F_ATOMIC"
+            | "NLM_F_DUMP"
+            | "NLM_F_REPLACE"
+            | "NLM_F_EXCL"
+            | "NLM_F_CREATE"
+            | "NLM_F_APPEND"
+            | "NLM_F_NONREC"
+            | "NLM_F_CAPPED"
+            | "NLM_F_ACK_TLVS"
+            | "NLMSG_NOOP"
+            | "NLMSG_ERROR"
+            | "NLMSG_DONE"
+            | "NLMSG_OVERRUN"
             | "NETLINK_ROUTE"
             | "NETLINK_UNUSED"
             | "NETLINK_USERSOCK"
@@ -2259,11 +2287,59 @@ fn test_freebsd(target: &str) {
             | "NETLINK_DNRTMSG"
             | "NETLINK_KOBJECT_UEVENT"
             | "NETLINK_GENERIC"
+            | "NLMSG_ALIGNTO"
+            | "CTRL_CMD_UNSPEC"
+            | "CTRL_CMD_NEWFAMILY"
+            | "CTRL_CMD_DELFAMILY"
+            | "CTRL_CMD_GETFAMILY"
+            | "CTRL_CMD_NEWOPS"
+            | "CTRL_CMD_DELOPS"
+            | "CTRL_CMD_GETOPS"
+            | "CTRL_CMD_NEWMCAST_GRP"
+            | "CTRL_CMD_DELMCAST_GRP"
+            | "CTRL_CMD_GETMCAST_GRP"
+            | "CTRL_CMD_GETPOLICY"
+            | "CTRL_ATTR_UNSPEC"
+            | "CTRL_ATTR_FAMILY_ID"
+            | "CTRL_ATTR_FAMILY_NAME"
+            | "CTRL_ATTR_VERSION"
+            | "CTRL_ATTR_HDRSIZE"
+            | "CTRL_ATTR_MAXATTR"
+            | "CTRL_ATTR_OPS"
+            | "CTRL_ATTR_MCAST_GROUPS"
+            | "CTRL_ATTR_POLICY"
+            | "CTRL_ATTR_OP_POLICY"
+            | "CTRL_ATTR_OP"
+            | "CTRL_ATTR_MCAST_GRP_UNSPEC"
+            | "CTRL_ATTR_MCAST_GRP_NAME"
+            | "CTRL_ATTR_MCAST_GRP_ID"
                 if Some(13) > freebsd_ver =>
             {
                 true
             }
 
+            "NFULA_PACKET_HDR"
+            | "NFULA_MARK"
+            | "NFULA_TIMESTAMP"
+            | "NFULA_IFINDEX_INDEV"
+            | "NFULA_IFINDEX_OUTDEV"
+            | "NFULA_IFINDEX_PHYSINDEV"
+            | "NFULA_IFINDEX_PHYSOUTDEV"
+            | "NFULA_HWADDR"
+            | "NFULA_PAYLOAD"
+            | "NFULA_PREFIX"
+            | "NFULA_UID"
+            | "NFULA_SEQ"
+            | "NFULA_SEQ_GLOBAL"
+            | "NFULA_GID"
+            | "NFULA_HWTYPE"
+            | "NFULA_HWHEADER"
+            | "NFULA_HWLEN"
+                if Some(12) > freebsd_ver =>
+            {
+                true
+            }
+
             // Added in FreeBSD 14
             "SPACECTL_DEALLOC" if Some(14) > freebsd_ver => true,
 
diff --git a/src/unix/bsd/freebsdlike/freebsd/mod.rs b/src/unix/bsd/freebsdlike/freebsd/mod.rs
index e0c7f54dd8dc1..1a18ebcc5e711 100644
--- a/src/unix/bsd/freebsdlike/freebsd/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/mod.rs
@@ -3064,6 +3064,12 @@ pub const SO_TS_DEFAULT: ::c_int = SO_TS_REALTIME_MICRO;
 pub const SO_TS_CLOCK_MAX: ::c_int = SO_TS_MONOTONIC;
 
 /// netlink constants
+
+// sys/socket.h
+pub const AF_NETLINK: ::c_int = 38;
+pub const PF_NETLINK: ::c_int = AF_NETLINK;
+
+// netlink/netlink.h
 pub const SOL_NETLINK: ::c_int = 270;
 pub const NETLINK_ADD_MEMBERSHIP: ::c_int = 1;
 pub const NETLINK_DROP_MEMBERSHIP: ::c_int = 2;
@@ -3077,10 +3083,34 @@ 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 NLM_F_REQUEST: ::c_int = 0x01;
+pub const NLM_F_MULTI: ::c_int = 0x02;
+pub const NLM_F_ACK: ::c_int = 0x04;
+pub const NLM_F_ECHO: ::c_int = 0x08;
+pub const NLM_F_DUMP_INTR: ::c_int = 0x10;
+pub const NLM_F_DUMP_FILTERED: ::c_int = 0x20;
+//
+pub const NLM_F_ROOT: ::c_int = 0x100;
+pub const NLM_F_MATCH: ::c_int = 0x200;
+pub const NLM_F_ATOMIC: ::c_int = 0x400;
+pub const NLM_F_DUMP: ::c_int = NLM_F_ROOT | NLM_F_MATCH;
+//
+pub const NLM_F_REPLACE: ::c_int = 0x100;
+pub const NLM_F_EXCL: ::c_int = 0x200;
+pub const NLM_F_CREATE: ::c_int = 0x400;
+pub const NLM_F_APPEND: ::c_int = 0x800;
+//
+pub const NLM_F_NONREC: ::c_int = 0x100;
+//
+pub const NLM_F_CAPPED: ::c_int = 0x100;
+pub const NLM_F_ACK_TLVS: ::c_int = 0x200;
+//
+pub const NLMSG_NOOP: ::c_int = 0x1;
+pub const NLMSG_ERROR: ::c_int = 0x2;
+pub const NLMSG_DONE: ::c_int = 0x3;
+pub const NLMSG_OVERRUN: ::c_int = 0x4;
+//
 pub const NETLINK_ROUTE: ::c_int = 0;
 pub const NETLINK_UNUSED: ::c_int = 1;
 pub const NETLINK_USERSOCK: ::c_int = 2;
@@ -3098,6 +3128,57 @@ 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;
+//
+const NL_ITEM_ALIGN_SIZE: ::c_int = 4;  // mem::size_of::<u32>(); FIXME accept new dep?
+pub const NLMSG_ALIGNTO: ::c_int = NL_ITEM_ALIGN_SIZE;
+
+// netlink/netlink_generic.h
+pub const CTRL_CMD_UNSPEC: ::c_int = 0;
+pub const CTRL_CMD_NEWFAMILY: ::c_int = 1;
+pub const CTRL_CMD_DELFAMILY: ::c_int = 2;
+pub const CTRL_CMD_GETFAMILY: ::c_int = 3;
+pub const CTRL_CMD_NEWOPS: ::c_int = 4;
+pub const CTRL_CMD_DELOPS: ::c_int = 5;
+pub const CTRL_CMD_GETOPS: ::c_int = 6;
+pub const CTRL_CMD_NEWMCAST_GRP: ::c_int = 7;
+pub const CTRL_CMD_DELMCAST_GRP: ::c_int = 8;
+pub const CTRL_CMD_GETMCAST_GRP: ::c_int = 9;
+pub const CTRL_CMD_GETPOLICY: ::c_int = 10;
+//
+pub const CTRL_ATTR_UNSPEC: ::c_int = 0;
+pub const CTRL_ATTR_FAMILY_ID: ::c_int = 1;
+pub const CTRL_ATTR_FAMILY_NAME: ::c_int = 2;
+pub const CTRL_ATTR_VERSION: ::c_int = 3;
+pub const CTRL_ATTR_HDRSIZE: ::c_int = 4;
+pub const CTRL_ATTR_MAXATTR: ::c_int = 5;
+pub const CTRL_ATTR_OPS: ::c_int = 6;
+pub const CTRL_ATTR_MCAST_GROUPS: ::c_int = 7;
+pub const CTRL_ATTR_POLICY: ::c_int = 8;
+pub const CTRL_ATTR_OP_POLICY: ::c_int = 9;
+pub const CTRL_ATTR_OP: ::c_int = 10;
+//
+pub const CTRL_ATTR_MCAST_GRP_UNSPEC: ::c_int = 0;
+pub const CTRL_ATTR_MCAST_GRP_NAME: ::c_int = 1;
+pub const CTRL_ATTR_MCAST_GRP_ID: ::c_int = 2;
+
+// pcap/nflog.h
+pub const NFULA_PACKET_HDR: ::c_int = 1;
+pub const NFULA_MARK: ::c_int = 2;
+pub const NFULA_TIMESTAMP: ::c_int = 3;
+pub const NFULA_IFINDEX_INDEV: ::c_int = 4;
+pub const NFULA_IFINDEX_OUTDEV: ::c_int = 5;
+pub const NFULA_IFINDEX_PHYSINDEV: ::c_int = 6;
+pub const NFULA_IFINDEX_PHYSOUTDEV: ::c_int = 7;
+pub const NFULA_HWADDR: ::c_int = 8;
+pub const NFULA_PAYLOAD: ::c_int = 9;
+pub const NFULA_PREFIX: ::c_int = 10;
+pub const NFULA_UID: ::c_int = 11;
+pub const NFULA_SEQ: ::c_int = 12;
+pub const NFULA_SEQ_GLOBAL: ::c_int = 13;
+pub const NFULA_GID: ::c_int = 14;
+pub const NFULA_HWTYPE: ::c_int = 15;
+pub const NFULA_HWHEADER: ::c_int = 16;
+pub const NFULA_HWLEN: ::c_int = 17;
 
 pub const LOCAL_CREDS: ::c_int = 2;
 pub const LOCAL_CREDS_PERSISTENT: ::c_int = 3;