From 189cd36d9e015968b751117688fa4f0fd64bde36 Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Sat, 31 Oct 2026 21:58:21 +0100
Subject: libp2p: warn/refuse bad prefer/ignore combos

---
 src/transport/libp2p/ignore.rs | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/transport/libp2p/ignore.rs')

diff --git a/src/transport/libp2p/ignore.rs b/src/transport/libp2p/ignore.rs
index 659ec91..51e1f45 100644
--- a/src/transport/libp2p/ignore.rs
+++ b/src/transport/libp2p/ignore.rs
@@ -37,6 +37,13 @@ impl FromStr for IpRange {
 }
 
 impl IpRange {
+    /// Whether every address of `other` is in this range too.
+    pub(super) fn covers(&self, other: &IpRange) -> bool {
+        self.network.is_ipv4() == other.network.is_ipv4()
+            && self.prefix <= other.prefix
+            && self.contains(other.network)
+    }
+
     pub(super) fn contains(&self, ip: std::net::IpAddr) -> bool {
         use std::net::IpAddr;
         match (self.network, ip) {
-- 
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