From f1e250672fe274cef9102e8ef1e5a4e939bac506 Mon Sep 17 00:00:00 2001
From: Matt Joiner <anacrolix@gmail.com>
Date: Thu, 27 Jan 2022 15:11:01 +1100
Subject: [PATCH] Fix v4 in v6 IPs from being banned as IPv4

---
 client.go | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/client.go b/client.go
index 29080c57..fae9cf27 100644
--- a/client.go
+++ b/client.go
@@ -1494,7 +1494,13 @@ func (cl *Client) AddDhtNodes(nodes []string) {
 }
 
 func (cl *Client) banPeerIP(ip net.IP) {
-	generics.MakeMapIfNilAndSet(&cl.badPeerIPs, netip.MustParseAddr(ip.String()), struct{}{})
+	// We can't take this from string, because it will lose netip's v4on6. net.ParseIP parses v4
+	// addresses directly to v4on6, which doesn't compare equal with v4.
+	ipAddr, ok := netip.AddrFromSlice(ip)
+	if !ok {
+		panic(ip)
+	}
+	generics.MakeMapIfNilAndSet(&cl.badPeerIPs, ipAddr, struct{}{})
 }
 
 func (cl *Client) newConnection(nc net.Conn, outgoing bool, remoteAddr PeerRemoteAddr, network, connString string) (c *PeerConn) {
-- 
2.48.1