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networkd: sit-tunnel add support for pmtudisc

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This patch adds path of mtu discovery for sit tunnel.
To enable/disable DiscoverPathMTU is introduced.

Example configuration

file: sit.netdev
[NetDev]
Name=sit-tun
Kind=sit
MTUBytes=1480

[Tunnel]
DiscoverPathMTU=1
Local=X.X.X.X
Remote=X.X.X.X

By default pmtudisc is turned on , if DiscoverPathMTU
is missing from the config. To turn it off
DiscoverPathMTU=0 needs to be set.
This commit is contained in:
Susant Sahani 2014-05-22 11:59:19 +05:30 committed by Tom Gundersen
parent 8bb088c5d4
commit a9f434cf00
4 changed files with 11 additions and 0 deletions
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1
src/network/networkd-netdev-gperf.gperf
View file

@ -29,4 +29,5 @@ Tunnel.Local, config_parse_tunnel_address, 0,
Tunnel.Remote, config_parse_tunnel_address, 0, offsetof(NetDev, tunnel_remote)
Tunnel.TOS, config_parse_unsigned, 0, offsetof(NetDev, tunnel_tos)
Tunnel.TTL, config_parse_unsigned, 0, offsetof(NetDev, tunnel_ttl)
Tunnel.DiscoverPathMTU, config_parse_bool, 0, offsetof(NetDev, tunnel_pmtudisc)
Peer.Name, config_parse_ifname, 0, offsetof(NetDev, ifname_peer)

1
src/network/networkd-netdev.c
View file

@ -545,6 +545,7 @@ static int netdev_load_one(Manager *manager, const char *filename) {
netdev->kind = _NETDEV_KIND_INVALID;
netdev->macvlan_mode = _NETDEV_MACVLAN_MODE_INVALID;
netdev->vlanid = VLANID_MAX + 1;
netdev->tunnel_pmtudisc = true;
r = config_parse(NULL, filename, file, "Match\0NetDev\0VLAN\0MACVLAN\0Tunnel\0Peer\0",
config_item_perf_lookup, (void*) network_netdev_gperf_lookup,

8
src/network/networkd-tunnel.c
View file

@ -207,6 +207,14 @@ static int netdev_fill_sit_rtnl_message(Link *link, sd_rtnl_message *m) {
return r;
}
r = sd_rtnl_message_append_u8(m, IFLA_IPTUN_PMTUDISC, netdev->tunnel_pmtudisc);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_IPTUN_PMTUDISC attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_close_container(m);
if (r < 0) {
log_error_netdev(netdev,

1
src/network/networkd.h
View file

@ -109,6 +109,7 @@ struct NetDev {
int ifindex;
NetDevState state;
bool tunnel_pmtudisc;
unsigned tunnel_ttl;
unsigned tunnel_tos;
struct in_addr tunnel_local;