patrick/zephyr
1
0
Fork 0
Code Issues Pull requests Actions 7 Packages Projects Releases Wiki Activity

net/ipv6: Take iface's MTU into account to decide fragmenting or not

Browse source 
In case of Ethernet for instance, the MTU is larger than the minimal
IPv6 MTU, so it is not required to fragment a packet that fits in
Ethernet MTU.

Fixes #14659

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
This commit is contained in:
Tomasz Bursztyka 2019-03-21 14:29:11 +01:00 committed by Anas Nashif
parent 3bc0f88653
commit c0de64fc59
1 changed files with 3 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
subsys/net/ip/ipv6_nbr.c
View file

@ -663,9 +663,11 @@ enum net_verdict net_ipv6_prepare_for_send(struct net_pkt *pkt)
* contain a proper value and we can skip other checks.
*/
if (net_pkt_ipv6_fragment_id(pkt) == 0) {
u16_t mtu = net_if_get_mtu(net_pkt_iface(pkt));
size_t pkt_len = net_pkt_get_len(pkt);
if (pkt_len > NET_IPV6_MTU) {
mtu = MAX(NET_IPV6_MTU, mtu);
if (mtu < pkt_len) {
ret = net_ipv6_send_fragmented_pkt(net_pkt_iface(pkt),
pkt, pkt_len);
if (ret < 0) {