Fix21: прод-фиксы swap/firewall/wg без легаси

- Swap: допуск небольшой дельты usable size при verify/compare

- Firewall: поддержка Debian 13 dynamic set/add @set вместо только literal meter

- WG: приоритет docker exec для peer/runtime discovery с безопасным fallback

traffic_core/src/firewall.rs

@@ -234,7 +234,7 @@ fn inspect_firewall(transport: &dyn NsTransport, cfg: &Config) -> anyhow::Result
     let hook_forward_present = nt.contains("hook forward");
     let policy_accept_present = nt.contains("policy accept");
     let ct_state_new_present = nt.contains("ct state new");
-    let meter_present = nt.contains("meter awg2_peer_connlimit_v4");
+    let meter_present = connlimit_state_present(&nt);
     let counter_name_used = nt.contains("counter name antitorrent_dropped_v4");
     let drop_present = nt.contains(" drop");
 
@@ -470,7 +470,7 @@ fn firewall_drift_reason(actual: &FirewallActual) -> String {
         return "missing ct state new".to_string();
     }
     if !actual.meter_present {
-        return "missing nft meter".to_string();
+        return "missing nft meter/dynamic set".to_string();
     }
     if !actual.counter_name_used {
         return "missing nft counter name usage".to_string();
@@ -496,12 +496,19 @@ fn firewall_rule_contract_matches(table: &str, cidr: &str, max_conn: u32) -> boo
         && table.contains("policy accept")
         && table.contains(&needle_cidr)
         && table.contains("ct state new")
-        && table.contains("meter awg2_peer_connlimit_v4")
+        && connlimit_state_present(&table)
         && table.contains(&needle_max)
         && table.contains("counter name antitorrent_dropped_v4")
         && table.contains("drop")
 }
 
+fn connlimit_state_present(table: &str) -> bool {
+    table.contains("meter awg2_peer_connlimit_v4")
+        || (table.contains("set awg2_peer_connlimit_v4")
+            && table.contains("flags dynamic")
+            && table.contains("add @awg2_peer_connlimit_v4"))
+}
+
 fn normalize_nft_text(input: &str) -> String {
     input
         .replace(['\n', '\t', '{', '}', ';', ',', '"'], " ")
@@ -633,6 +640,27 @@ table inet awg2_harness {
         assert!(firewall_rule_contract_matches(table, "10.8.1.0/24", 100));
     }
 
+    #[test]
+    fn nft_rule_contract_accepts_debian13_dynamic_set_rendering() {
+        let table = r#"
+table inet awg2_harness {
+  counter antitorrent_dropped_v4 {
+    packets 0 bytes 0
+  }
+  set awg2_peer_connlimit_v4 {
+    type ipv4_addr
+    size 65535
+    flags dynamic
+  }
+  chain forward_antitorrent {
+    type filter hook forward priority filter; policy accept;
+    ip saddr 10.8.1.0/24 ct state new add @awg2_peer_connlimit_v4 { ip saddr ct count over 100 } counter name "antitorrent_dropped_v4" drop
+  }
+}
+"#;
+        assert!(firewall_rule_contract_matches(table, "10.8.1.0/24", 100));
+    }
+
     #[test]
     fn host_firewall_parser_tolerates_quoted_lo_and_ipv6_icmp_alias() {
         let table = r#"

traffic_core/src/swap.rs

@@ -195,7 +195,9 @@ fn disable_foreign_swaps(desired: &DesiredSwap, active: &[ActiveSwap]) -> anyhow
         if entry.name != desired.path {
             run("swapoff", &[entry.name.to_string_lossy().as_ref()])?;
             maybe_delete_foreign_swapfile(entry, &desired.path)?;
-        } else if entry.size_bytes != desired.size_bytes || entry.priority != desired.priority {
+        } else if !active_swap_size_matches(entry.size_bytes, desired.size_bytes)
+            || entry.priority != desired.priority
+        {
             run("swapoff", &[desired.path.to_string_lossy().as_ref()])?;
         }
     }
@@ -428,7 +430,7 @@ fn verify_exclusive_swap_state(desired: &DesiredSwap) -> anyhow::Result<()> {
             desired.path.display()
         );
     }
-    if only.size_bytes != desired.size_bytes {
+    if !active_swap_size_matches(only.size_bytes, desired.size_bytes) {
         anyhow::bail!(
             "swap verify failed: size mismatch {} != {}",
             only.size_bytes,
@@ -490,6 +492,13 @@ fn normalize_ws(s: &str) -> String {
     s.split_whitespace().collect::<Vec<_>>().join(" ")
 }
 
+fn active_swap_size_matches(active_bytes: u64, desired_file_bytes: u64) -> bool {
+    if active_bytes == desired_file_bytes {
+        return true;
+    }
+    active_bytes < desired_file_bytes && desired_file_bytes - active_bytes <= 1024 * 1024
+}
+
 fn run(program: &str, args: &[&str]) -> anyhow::Result<()> {
     let out = Command::new(program).args(args).output()?;
     if !out.status.success() {
@@ -542,6 +551,12 @@ mod tests {
         assert_eq!(got[0].priority, 1);
     }
 
+    #[test]
+    fn active_swap_size_accepts_mkswap_usable_size_delta() {
+        assert!(active_swap_size_matches(2147479552, 2147483648));
+        assert!(!active_swap_size_matches(2146435072, 2147483648));
+    }
+
     #[test]
     fn parse_swapon_rejects_malformed_size() {
         let err = parse_swapon_output("/swapfile file abc 1\n");

traffic_core/src/wg.rs

@@ -21,15 +21,25 @@ pub struct PeerRuntime {
 }
 
 pub fn discover_peers(pid: u32, container: &str, peer_cidr: &str) -> anyhow::Result<Vec<Peer>> {
-    let boxed: Box<dyn NsTransport> = if nsenter_available() {
-        Box::new(NsenterTransport { pid })
-    } else {
-        Box::new(DockerExecTransport {
+    let docker = DockerExecTransport {
         container: container.to_string(),
-        })
     };
+    let docker_result = discover_peers_with_transport(&docker, peer_cidr);
+    if let Ok(peers) = &docker_result
+        && (!peers.is_empty() || !nsenter_available())
+    {
+        return docker_result;
+    }
 
-    discover_peers_with_transport(boxed.as_ref(), peer_cidr)
+    if nsenter_available() {
+        let nsenter = NsenterTransport { pid };
+        match discover_peers_with_transport(&nsenter, peer_cidr) {
+            Ok(peers) if !peers.is_empty() => Ok(peers),
+            _ => docker_result,
+        }
+    } else {
+        docker_result
+    }
 }
 
 pub fn discover_peers_with_transport(
@@ -57,14 +67,25 @@ pub fn discover_peer_runtime(
     container: &str,
     peer_cidr: &str,
 ) -> anyhow::Result<Vec<PeerRuntime>> {
-    let boxed: Box<dyn NsTransport> = if nsenter_available() {
-        Box::new(NsenterTransport { pid })
-    } else {
-        Box::new(DockerExecTransport {
+    let docker = DockerExecTransport {
         container: container.to_string(),
-        })
     };
-    discover_peer_runtime_with_transport(boxed.as_ref(), peer_cidr)
+    let docker_result = discover_peer_runtime_with_transport(&docker, peer_cidr);
+    if let Ok(peers) = &docker_result
+        && (!peers.is_empty() || !nsenter_available())
+    {
+        return docker_result;
+    }
+
+    if nsenter_available() {
+        let nsenter = NsenterTransport { pid };
+        match discover_peer_runtime_with_transport(&nsenter, peer_cidr) {
+            Ok(peers) if !peers.is_empty() => Ok(peers),
+            _ => docker_result,
+        }
+    } else {
+        docker_result
+    }
 }
 
 pub fn discover_peer_runtime_with_transport(