Commit c6ce1d08 authored Jan 27, 2017 by Andreas Schultz Committed by David S. Miller Jan 27, 2017

gtp: clear DF bit on GTP packet tx



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>
Acked-by: Harald Welte <laforge@netfilter.org>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent ab729823

drivers/net/gtp.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;