From: SuperQ <superq@gmail.com>
Date: Sat, 22 Jan 2022 15:37:30 +0000 (+0100)
Subject: Fix IP hash
X-Git-Url: https://vcs.fsf.org/?a=commitdiff_plain;h=338309104e6c00fa6be6f27dcc05ee34c2e16b01;p=blackbox_exporter.git

Fix IP hash

Select the correct slice of bytes to hash based on IPv4 or IPv6 address
family.

Signed-off-by: SuperQ <superq@gmail.com>
---

diff --git a/prober/utils.go b/prober/utils.go
index 74fb41d..52f9f34 100644
--- a/prober/utils.go
+++ b/prober/utils.go
@@ -135,6 +135,10 @@ func chooseProtocol(ctx context.Context, IPProtocol string, fallbackIPProtocol b
 
 func ipHash(ip net.IP) float64 {
 	h := fnv.New32a()
-	h.Write(ip)
+	if ip.To4() != nil {
+		h.Write(ip.To4())
+	} else {
+		h.Write(ip.To16())
+	}
 	return float64(h.Sum32())
 }