From ed2685ace7c76d6a29b585dd88266831c38e957b Mon Sep 17 00:00:00 2001
From: Fredi Raspall <fredi@githedgehog.com>
Date: Fri, 31 Jul 2026 13:23:03 +0200
Subject: [PATCH] feat(net): augment hash_ip() to consider icmp id

Augment the hash method for ip packets to consider the ICMP id
field (if present). This adds entropy and allows spraying ICMP
traffic over ECMP legs.

Signed-off-by: Fredi Raspall <fredi@githedgehog.com>
---
 net/src/packet/hash.rs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/net/src/packet/hash.rs b/net/src/packet/hash.rs
index cbf1aa32cf..b843fe2fdd 100644
--- a/net/src/packet/hash.rs
+++ b/net/src/packet/hash.rs
@@ -38,7 +38,16 @@ impl<Buf: PacketBufferMut> Packet<Buf> {
                         udp.source().hash(state);
                         udp.destination().hash(state);
                     }
-                    &Transport::Icmp4(_) | &Transport::Icmp6(_) => {}
+                    Transport::Icmp4(icmp4) => {
+                        if let Some(id) = icmp4.identifier() {
+                            id.hash(state);
+                        }
+                    }
+                    Transport::Icmp6(icmp6) => {
+                        if let Some(id) = icmp6.identifier() {
+                            id.hash(state);
+                        }
+                    }
                 }
             }
         }