From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: passt.top; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: passt.top; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=INq5jlC7; dkim-atps=neutral Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by passt.top (Postfix) with ESMTPS id 24A455A0271 for ; Wed, 10 Sep 2025 03:59:26 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1757469564; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=c/yTCt/fBlfpazwta6urzbl8xgLQ8HCuKMCKUDa0e0Q=; b=INq5jlC7FxDUixtz71QRXEj2L9ZJwuQBMhXsBktxTCyxB+TQo8i3wwPDl1U2zFY+ZUltjB 7BmFbAVoE9M1BNMzoAXbcTb9JMZyvkA4pdrWtkpP+AC6z3SN1zxHBwJK1AEOKOnALbjOKG O+AKQ3fL+9b1llYHF88Ku2oI4X6TLVE= Received: from mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-571-tg58p4EhMUSwORg5tUMx_A-1; Tue, 09 Sep 2025 21:59:23 -0400 X-MC-Unique: tg58p4EhMUSwORg5tUMx_A-1 X-Mimecast-MFC-AGG-ID: tg58p4EhMUSwORg5tUMx_A_1757469562 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id B4F0F19560B6; Wed, 10 Sep 2025 01:59:22 +0000 (UTC) Received: from jmaloy-thinkpadp16vgen1.rmtcaqc.csb (unknown [10.22.88.21]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id C805E1955F24; Wed, 10 Sep 2025 01:59:20 +0000 (UTC) From: Jon Maloy To: sbrivio@redhat.com, dgibson@redhat.com, david@gibson.dropbear.id.au, jmaloy@redhat.com, passt-dev@passt.top Subject: [PATCH v6 0/8] Use true MAC address of LAN local remote hosts Date: Tue, 9 Sep 2025 21:59:11 -0400 Message-ID: <20250910015919.173414-1-jmaloy@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: kNWx4dKN61ynTw5bG8QKYbpYdp9XA578_m7xrKIwQB0_1757469562 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Message-ID-Hash: QU2T4RJAFV4LDKTSWNBHJOTQOHCVALRT X-Message-ID-Hash: QU2T4RJAFV4LDKTSWNBHJOTQOHCVALRT X-MailFrom: jmaloy@redhat.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.8 Precedence: list List-Id: Development discussion and patches for passt Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: Bug #120 asks us to use the true MAC addresses of LAN local remote hosts, since some programs need this information. These commits introduces this for ARP, NDP, UDP, TCP and ICMP. --- v3: Updated according to feedback from Stefano and David: - Made the ARP/NDP lookup call filter out the requested address by itself, qualified by the index if the template interface - Moved the flow specific MAC address from struct flowside to struct flow_common. v4: - Updated according to feedback from David and Stefan - Added a cache table for ARP/NDP table contents v5: - Updated according to feedback from David and Stefan - Added cache table entries to FIFO/LRU queue - New criteria for when to consult ARP/NDP v6: - Simplified and merged mac cache table commits - Other changes after feedback from David. Jon Maloy (8): netlink: add function to extract MAC addresses from NDP/ARP table fwd: Added cache table for ARP/NDP contents arp/ndp: respond with true MAC address of LAN local remote hosts flow: add MAC address of LAN local remote hosts to flow udp: forward external source MAC address through tap interface tcp: forward external source MAC address through tap interface tap: change signature of function tap_push_l2h() icmp: let icmp use mac address from flowside structure arp.c | 9 ++- conf.c | 1 + flow.c | 2 + flow.h | 2 + fwd.c | 184 +++++++++++++++++++++++++++++++++++++++++++++++-- fwd.h | 6 ++ icmp.c | 8 ++- inany.c | 1 + ndp.c | 10 ++- netlink.c | 82 ++++++++++++++++++++++ netlink.h | 2 + passt.c | 9 ++- passt.h | 3 +- pasta.c | 2 +- tap.c | 24 ++++--- tap.h | 7 +- tcp.c | 18 +++-- tcp.h | 2 +- tcp_buf.c | 37 +++++----- tcp_internal.h | 4 +- tcp_vu.c | 5 +- udp.c | 57 +++++++++------ udp.h | 2 +- util.c | 12 ++++ util.h | 1 + 25 files changed, 407 insertions(+), 83 deletions(-) -- 2.50.1