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| author | Thomas Haller <thaller@redhat.com> | 2017-01-16 14:58:11 +0100 |
|---|---|---|
| committer | Thomas Haller <thaller@redhat.com> | 2017-01-16 15:06:40 +0100 |
| commit | 0559242521f32d8a40a0dcedeaa312714f6b8f6f (patch) | |
| tree | 4325013a542032d381057135e2532aeaf5235c94 | |
| parent | 58d4216257edfd5dd195ee7e8318a63548c33629 (diff) | |
| download | NetworkManager-th/device-mtu-bgo777251.tar.gz | |
device: enforce a link MTU of at least 1280 for connections with IPv6th/device-mtu-bgo777251
| -rw-r--r-- | src/devices/nm-device.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/devices/nm-device.c b/src/devices/nm-device.c index 295b29583d..dd34bda63e 100644 --- a/src/devices/nm-device.c +++ b/src/devices/nm-device.c @@ -6659,6 +6659,22 @@ _commit_mtu (NMDevice *self, const NMIP4Config *config) } } + if (mtu_desired && mtu_desired < 1280) { + NMSettingIPConfig *s_ip6; + + s_ip6 = (NMSettingIPConfig *) nm_device_get_applied_setting (self, NM_TYPE_SETTING_IP6_CONFIG); + if (s_ip6 && nm_streq0 (nm_setting_ip_config_get_method (s_ip6), + NM_SETTING_IP6_CONFIG_METHOD_IGNORE)) { + /* the interface has IPv6 enabled. The MTU with IPv6 cannot be smaller + * then 1280. + * + * For slave-devices (that don't have @s_ip6 we) don't do this fixup because + * it's anyway an unsolved problem when the slave configures a conflicting + * MTU. */ + mtu_desired = 1280; + } + } + ip6_mtu = priv->ip6_mtu; if (!ip6_mtu && !priv->mtu_initialized) { /* initially, if the IPv6 MTU is not specified, grow it as large as the |