From: David Gibson <david@gibson.dropbear.id.au>
To: Stefano Brivio <sbrivio@redhat.com>, passt-dev@passt.top
Cc: David Gibson <david@gibson.dropbear.id.au>
Subject: [PATCH v4 1/9] tap: Don't clobber source address in tap6_handler()
Date: Tue, 22 Aug 2023 15:29:52 +1000 [thread overview]
Message-ID: <20230822053000.1118063-2-david@gibson.dropbear.id.au> (raw)
In-Reply-To: <20230822053000.1118063-1-david@gibson.dropbear.id.au>
In tap6_handler() saddr is initialized to the IPv6 source address from the
incoming packet. However part way through, but before organizing the
packet into a "sequence" we set it unconditionally to the guest's assigned
address. We don't do anything equivalent for IPv4.
This doesn't make a lot of sense: if the guest is using a different source
address it makes sense to consider these different sequences of packets and
we shouldn't try to combine them together.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
tap.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/tap.c b/tap.c
index 760deb7..6a14692 100644
--- a/tap.c
+++ b/tap.c
@@ -818,8 +818,6 @@ resume:
continue;
}
- *saddr = c->ip6.addr;
-
if (proto != IPPROTO_TCP && proto != IPPROTO_UDP) {
tap_packet_debug(NULL, ip6h, NULL, proto, NULL, 1);
continue;
--
@@ -818,8 +818,6 @@ resume:
continue;
}
- *saddr = c->ip6.addr;
-
if (proto != IPPROTO_TCP && proto != IPPROTO_UDP) {
tap_packet_debug(NULL, ip6h, NULL, proto, NULL, 1);
continue;
--
2.41.0
next prev parent reply other threads:[~2023-08-22 5:30 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-22 5:29 [PATCH v4 0/9] Flow Table Preliminaries David Gibson
2023-08-22 5:29 ` David Gibson [this message]
2023-08-22 8:46 ` [PATCH v4 1/9] tap: Don't clobber source address in tap6_handler() Stefano Brivio
2023-08-22 5:29 ` [PATCH v4 2/9] tap: Pass source address to protocol handler functions David Gibson
2023-08-22 5:29 ` [PATCH v4 3/9] tcp: More precise terms for addresses and ports David Gibson
2023-08-22 5:29 ` [PATCH v4 4/9] tcp: Consistent usage of ports in tcp_seq_init() David Gibson
2023-08-22 8:46 ` Stefano Brivio
2023-08-22 5:29 ` [PATCH v4 5/9] tcp, udp: Don't include destination address in partially precomputed csums David Gibson
2023-08-22 8:46 ` Stefano Brivio
2023-08-22 5:29 ` [PATCH v4 6/9] tcp, udp: Don't pre-fill IPv4 destination address in headers David Gibson
2023-08-22 5:29 ` [PATCH v4 7/9] tcp: Move in_epoll flag out of common connection structure David Gibson
2023-08-22 5:29 ` [PATCH v4 8/9] inany: Add missing double include guard to inany.h David Gibson
2023-08-22 5:30 ` [PATCH v4 9/9] tcp: Remove broken pressure calculations for tcp_defer_handler() David Gibson
2023-08-22 12:05 ` [PATCH v4 0/9] Flow Table Preliminaries Stefano Brivio
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