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zebra: Add check for mtu on netlink RTM_NEWLINK

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Zebra needed a check for mtu from the message it
received from the kernel before adding the new link.

Signed-off-by: Stephen Worley <sworley@cumulusnetworks.com>
This commit is contained in:
Stephen Worley 2018-07-20 16:10:43 -04:00
parent c4aee4fe31
commit d23b983bd4
1 changed files with 12 additions and 0 deletions
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12
zebra/if_netlink.c
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@ -1218,6 +1218,12 @@ int netlink_link_change(struct nlmsghdr *h, ns_id_t ns_id, int startup)
/* Update interface information. */
set_ifindex(ifp, ifi->ifi_index, zns);
ifp->flags = ifi->ifi_flags & 0x0000fffff;
if (!tb[IFLA_MTU]) {
zlog_warn(
"RTM_NEWLINK for interface %s(%u) without MTU set",
name, ifi->ifi_index);
return 0;
}
ifp->mtu6 = ifp->mtu = *(int *)RTA_DATA(tb[IFLA_MTU]);
ifp->metric = 0;
ifp->ptm_status = ZEBRA_PTM_STATUS_UNKNOWN;
@ -1267,6 +1273,12 @@ int netlink_link_change(struct nlmsghdr *h, ns_id_t ns_id, int startup)
bridge_ifindex, ifi->ifi_flags);
set_ifindex(ifp, ifi->ifi_index, zns);
if (!tb[IFLA_MTU]) {
zlog_warn(
"RTM_NEWLINK for interface %s(%u) without MTU set",
name, ifi->ifi_index);
return 0;
}
ifp->mtu6 = ifp->mtu = *(int *)RTA_DATA(tb[IFLA_MTU]);
ifp->metric = 0;