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network: do not try to update IP sysctl settings for CAN devices

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CAN devices do not support IP layer.

Most of the functions below are never called for CAN devices, but
link_set_ipv6_mtu() may be called after setting interface MTU, and warn
about the failure.

For safety, let's unconditionally check if the interface is not a CAN
device.
This commit is contained in:
Yu Watanabe
2023-12-08 10:47:42 +09:00
parent 01a88375e3
commit f43ce810c4
1 changed files with 6 additions and 0 deletions
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src/network/networkd-sysctl.c
+6
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@@ -22,6 +22,12 @@ static bool link_is_configured_for_family(Link *link, int family) {
if (link->flags & IFF_LOOPBACK)
return false;
/* CAN devices do not support IP layer. Most of the functions below are never called for CAN devices,
* but link_set_ipv6_mtu() may be called after setting interface MTU, and warn about the failure. For
* safety, let's unconditionally check if the interface is not a CAN device. */
if (IN_SET(family, AF_INET, AF_INET6) && link->iftype == ARPHRD_CAN)
return false;
if (family == AF_INET6 && !socket_ipv6_is_supported())
return false;