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OSPF: Support of authentication trailer for OSPFv3

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Implement RFC 7166, crypthographic authentication for OSPFv3
analogous to authentication used for OSPFv2.
This commit is contained in:
Ondrej Zajicek (work)
2018-04-25 15:50:57 +02:00
parent f3a8cf050e
commit 4727d1db9d
7 changed files with 265 additions and 46 deletions
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13
proto/ospf/iface.c
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@@ -61,7 +61,10 @@ ifa_tx_hdrlen(struct ospf_iface *ifa)
/* Relevant just for OSPFv2 */
if (ifa->autype == OSPF_AUTH_CRYPT)
{
hlen += ospf_is_v2(p) ? 0 : sizeof(struct ospf_auth3);
hlen += max_mac_length(ifa->passwords);
}
return hlen;
}
@@ -137,7 +140,7 @@ ospf_sk_open(struct ospf_iface *ifa)
goto err;
/* 12 is an offset of the checksum in an OSPFv3 packet */
if (ospf_is_v3(p))
if (ospf_is_v3(p) && !ifa->autype)
if (sk_set_ipv6_checksum(sk, 12) < 0)
goto err;
@@ -828,6 +831,14 @@ ospf_iface_reconfigure(struct ospf_iface *ifa, struct ospf_iface_patt *new)
{
OSPF_TRACE(D_EVENTS, "Changing authentication type of %s", ifname);
ifa->autype = new->autype;
/* For OSPFv3, we need to update checksum calculation by OS */
if (ospf_is_v3(p) && ifa->sk)
if (sk_set_ipv6_checksum(ifa->sk, ifa->autype ? -1 : 12) < 0)
{
sk_log_error(ifa->sk, p->p.name);
return 0;
}
}
/* Update passwords */