linux: add missing netfilter definitions

Fill in missing constants available as of Linux v5.18. The
relevant UAPI headers are

- nfnetlink.h
- nfnetlink_log.h
- nfnetlink_queue.h

Author: phi-gamma

libc-test/build.rs

@@ -3190,6 +3190,15 @@ fn test_linux(target: &str) {
             // Added in Linux 5.14
             "FUTEX_LOCK_PI2" => true,
 
+            // Parts of netfilter/nfnetlink*.h require more recent kernel headers:
+            | "NFNL_SUBSYS_HOOK" // v5.14+
+            | "NFQA_VLAN" // v4.7+
+            | "NFQA_L2HDR" // v4.7+
+            | "NFQA_PRIORITY" // v5.18+
+            | "NFQA_VLAN_UNSPEC" // v4.7+
+            | "NFQA_VLAN_PROTO" // v4.7+
+            | "NFQA_VLAN_TCI" => true, // v4.7+
+
             _ => false,
         }
     });

src/unix/linux_like/linux/mod.rs

@@ -2086,6 +2086,7 @@ pub const NFNLGRP_CONNTRACK_EXP_UPDATE: ::c_int = 5;
 pub const NFNLGRP_CONNTRACK_EXP_DESTROY: ::c_int = 6;
 pub const NFNLGRP_NFTABLES: ::c_int = 7;
 pub const NFNLGRP_ACCT_QUOTA: ::c_int = 8;
+pub const NFNLGRP_NFTRACE: ::c_int = 9;
 
 pub const NFNETLINK_V0: ::c_int = 0;
 
@@ -2101,15 +2102,31 @@ pub const NFNL_SUBSYS_CTNETLINK_TIMEOUT: ::c_int = 8;
 pub const NFNL_SUBSYS_CTHELPER: ::c_int = 9;
 pub const NFNL_SUBSYS_NFTABLES: ::c_int = 10;
 pub const NFNL_SUBSYS_NFT_COMPAT: ::c_int = 11;
-pub const NFNL_SUBSYS_COUNT: ::c_int = 12;
+cfg_if! {
+    if #[cfg(target_env = "musl")] {
+        // FIXME: musl "sanitized" kernel headers lag bit behind;
+        // NFNL_SUBSYS_COUNT was added with v5.14.
+        pub const NFNL_SUBSYS_COUNT: ::c_int = 12;
+    } else {
+        pub const NFNL_SUBSYS_HOOK: ::c_int = 12;
+        pub const NFNL_SUBSYS_COUNT: ::c_int = 13;
+    }
+}
 
 pub const NFNL_MSG_BATCH_BEGIN: ::c_int = NLMSG_MIN_TYPE;
 pub const NFNL_MSG_BATCH_END: ::c_int = NLMSG_MIN_TYPE + 1;
 
+pub const NFNL_BATCH_UNSPEC: ::c_int = 0;
+pub const NFNL_BATCH_GENID: ::c_int = 1;
+
 // linux/netfilter/nfnetlink_log.h
 pub const NFULNL_MSG_PACKET: ::c_int = 0;
 pub const NFULNL_MSG_CONFIG: ::c_int = 1;
 
+pub const NFULA_VLAN_UNSPEC: ::c_int = 0;
+pub const NFULA_VLAN_PROTO: ::c_int = 1;
+pub const NFULA_VLAN_TCI: ::c_int = 2;
+
 pub const NFULA_UNSPEC: ::c_int = 0;
 pub const NFULA_PACKET_HDR: ::c_int = 1;
 pub const NFULA_MARK: ::c_int = 2;
@@ -2130,6 +2147,8 @@ pub const NFULA_HWHEADER: ::c_int = 16;
 pub const NFULA_HWLEN: ::c_int = 17;
 pub const NFULA_CT: ::c_int = 18;
 pub const NFULA_CT_INFO: ::c_int = 19;
+pub const NFULA_VLAN: ::c_int = 20;
+pub const NFULA_L2HDR: ::c_int = 21;
 
 pub const NFULNL_CFG_CMD_NONE: ::c_int = 0;
 pub const NFULNL_CFG_CMD_BIND: ::c_int = 1;
@@ -2153,7 +2172,7 @@ pub const NFULNL_CFG_F_SEQ: ::c_int = 0x0001;
 pub const NFULNL_CFG_F_SEQ_GLOBAL: ::c_int = 0x0002;
 pub const NFULNL_CFG_F_CONNTRACK: ::c_int = 0x0004;
 
-// linux/netfilter/nfnetlink_log.h
+// linux/netfilter/nfnetlink_queue.h
 pub const NFQNL_MSG_PACKET: ::c_int = 0;
 pub const NFQNL_MSG_VERDICT: ::c_int = 1;
 pub const NFQNL_MSG_CONFIG: ::c_int = 2;
@@ -2178,18 +2197,13 @@ pub const NFQA_EXP: ::c_int = 15;
 pub const NFQA_UID: ::c_int = 16;
 pub const NFQA_GID: ::c_int = 17;
 pub const NFQA_SECCTX: ::c_int = 18;
-/*
- FIXME: These are not yet available in musl sanitized kernel headers and
- make the tests fail. Enable them once musl has them.
-
- See https://github.com/rust-lang/libc/pull/1628 for more details.
 pub const NFQA_VLAN: ::c_int = 19;
 pub const NFQA_L2HDR: ::c_int = 20;
+pub const NFQA_PRIORITY: ::c_int = 21;
 
 pub const NFQA_VLAN_UNSPEC: ::c_int = 0;
 pub const NFQA_VLAN_PROTO: ::c_int = 1;
 pub const NFQA_VLAN_TCI: ::c_int = 2;
-*/
 
 pub const NFQNL_CFG_CMD_NONE: ::c_int = 0;
 pub const NFQNL_CFG_CMD_BIND: ::c_int = 1;
@@ -2219,6 +2233,8 @@ pub const NFQA_SKB_CSUMNOTREADY: ::c_int = 0x0001;
 pub const NFQA_SKB_GSO: ::c_int = 0x0002;
 pub const NFQA_SKB_CSUM_NOTVERIFIED: ::c_int = 0x0004;
 
+// linux/genetlink.h
+
 pub const GENL_NAMSIZ: ::c_int = 16;
 
 pub const GENL_MIN_ID: ::c_int = NLMSG_MIN_TYPE;