From: Andreas Schultz <aschultz@tpip.net>
To: Pablo Neira <pablo@netfilter.org>
Cc: netdev@vger.kernel.org,
Lionel Gauthier <Lionel.Gauthier@eurecom.fr>,
openbsc@lists.osmocom.org, Harald Welte <laforge@gnumonks.org>
Subject: [PATCH 2/5] gtp: clear DF bit on GTP packet tx
Date: Tue, 24 Jan 2017 18:23:59 +0100 [thread overview]
Message-ID: <20170124172402.12096-3-aschultz@tpip.net> (raw)
In-Reply-To: <20170124172402.12096-1-aschultz@tpip.net>
3GPP TS 29.281 and 3GPP TS 29.060 imply that GTP-U packets should be
sent with the DF bit cleared. For example 3GPP TS 29.060, Release 8,
Section 13.2.2:
> Backbone router: Any router in the backbone may fragment the GTP
> packet if needed, according to IPv4.
Signed-off-by: Andreas Schultz <aschultz@tpip.net>
---
drivers/net/gtp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c
index 7580ccc..1df54d6 100644
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -612,7 +612,7 @@ static netdev_tx_t gtp_dev_xmit(struct sk_buff *skb, struct net_device *dev)
pktinfo.fl4.saddr, pktinfo.fl4.daddr,
pktinfo.iph->tos,
ip4_dst_hoplimit(&pktinfo.rt->dst),
- htons(IP_DF),
+ 0,
pktinfo.gtph_port, pktinfo.gtph_port,
true, false);
break;
--
2.10.2
next prev parent reply other threads:[~2017-01-24 17:24 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-24 17:23 [PATCH 0/5] simple gtp improvements Andreas Schultz
2017-01-24 17:23 ` [PATCH 1/5] gtp: add genl family modules alias Andreas Schultz
2017-01-24 19:16 ` Pablo Neira Ayuso
2017-01-24 17:23 ` Andreas Schultz [this message]
2017-01-24 19:17 ` [PATCH 2/5] gtp: clear DF bit on GTP packet tx Pablo Neira Ayuso
2017-01-24 17:24 ` [PATCH 3/5] gtp: fix cross netns recv on gtp socket Andreas Schultz
2017-01-24 19:15 ` Pablo Neira Ayuso
2017-01-24 23:48 ` kbuild test robot
2017-01-24 17:24 ` [PATCH 4/5] gtp: remove unnecessary rcu_read_lock Andreas Schultz
2017-01-24 19:17 ` Pablo Neira Ayuso
2017-01-24 17:24 ` [PATCH 5/5] gtp: let userspace handle packets for invalid tunnels Andreas Schultz
2017-01-24 19:03 ` Pablo Neira Ayuso
2017-01-24 20:02 ` Andreas Schultz
2017-01-24 20:19 ` Pablo Neira Ayuso
2017-01-24 18:26 ` [PATCH 0/5] simple gtp improvements Harald Welte
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