diff options
| author | Radu Carpa <radu.carpa@cern.ch> | 2023-01-17 18:13:37 +0100 |
|---|---|---|
| committer | Ondrej Zajicek <santiago@crfreenet.org> | 2023-01-17 18:13:37 +0100 |
| commit | 7144c9ca46f092da33a4e051bbce8f973a3bd8c4 (patch) | |
| tree | 4b2d6f0b3da49d0236075cae3c05c61bb60a5579 /filter | |
| parent | 928a1cb034e6f9e8edcdd1dc07264cd703e00827 (diff) | |
Filter: Allow setting the 'onlink' route attribute in filters
Add static route attribute to set onlink flag for route next hop. Can be
used to build a dynamically routed IP-in-IP overlay network. Usage:
ifname = "tunl0";
onlink = true;
gw = bgp_next_hop;
Diffstat (limited to 'filter')
| -rw-r--r-- | filter/config.Y | 3 | ||||
| -rw-r--r-- | filter/data.h | 1 | ||||
| -rw-r--r-- | filter/f-inst.c | 14 |
3 files changed, 15 insertions, 3 deletions
diff --git a/filter/config.Y b/filter/config.Y index 1d9d9aa9..a1e5e9f1 100644 --- a/filter/config.Y +++ b/filter/config.Y @@ -305,7 +305,7 @@ CF_KEYWORDS(FUNCTION, PRINT, PRINTN, UNSET, RETURN, IF, THEN, ELSE, CASE, FOR, IN, DO, TRUE, FALSE, RT, RO, UNKNOWN, GENERIC, - FROM, GW, NET, MASK, PROTO, SOURCE, SCOPE, DEST, IFNAME, IFINDEX, WEIGHT, GW_MPLS, + FROM, GW, NET, MASK, PROTO, SOURCE, SCOPE, DEST, IFNAME, IFINDEX, WEIGHT, GW_MPLS, ONLINK, PREFERENCE, ROA_CHECK, ASN, SRC, DST, IS_V4, IS_V6, @@ -795,6 +795,7 @@ static_attr: | WEIGHT { $$ = f_new_static_attr(T_INT, SA_WEIGHT, 0); } | PREFERENCE { $$ = f_new_static_attr(T_INT, SA_PREF, 0); } | GW_MPLS { $$ = f_new_static_attr(T_INT, SA_GW_MPLS, 0); } + | ONLINK { $$ = f_new_static_attr(T_BOOL, SA_ONLINK, 0); } ; term: diff --git a/filter/data.h b/filter/data.h index 700609e9..b3767f7b 100644 --- a/filter/data.h +++ b/filter/data.h @@ -102,6 +102,7 @@ enum f_sa_code { SA_WEIGHT, SA_PREF, SA_GW_MPLS, + SA_ONLINK, } PACKED; /* Static attribute definition (members of struct rta) */ diff --git a/filter/f-inst.c b/filter/f-inst.c index 2d2a30e4..e4b47ff4 100644 --- a/filter/f-inst.c +++ b/filter/f-inst.c @@ -694,6 +694,7 @@ case SA_WEIGHT: RESULT(sa.f_type, i, rta->nh.weight + 1); break; case SA_PREF: RESULT(sa.f_type, i, rta->pref); break; case SA_GW_MPLS: RESULT(sa.f_type, i, rta->nh.labels ? rta->nh.label[0] : MPLS_NULL); break; + case SA_ONLINK: RESULT(sa.f_type, i, rta->nh.flags & RNF_ONLINK ? 1 : 0); break; default: bug("Invalid static attribute access (%u/%u)", sa.f_type, sa.sa_code); @@ -720,8 +721,8 @@ case SA_GW: { ip_addr ip = v1.val.ip; - struct iface *ifa = ipa_is_link_local(ip) ? rta->nh.iface : NULL; - neighbor *n = neigh_find((*fs->rte)->src->proto, ip, ifa, 0); + struct iface *ifa = ipa_is_link_local(ip) || (rta->nh.flags & RNF_ONLINK) ? rta->nh.iface : NULL; + neighbor *n = neigh_find((*fs->rte)->src->proto, ip, ifa, (rta->nh.flags & RNF_ONLINK) ? NEF_ONLINK : 0); if (!n || (n->scope == SCOPE_HOST)) runtime( "Invalid gw address" ); @@ -801,6 +802,15 @@ rta->pref = v1.val.i; break; + case SA_ONLINK: + { + if (v1.val.i) + rta->nh.flags |= RNF_ONLINK; + else + rta->nh.flags &= ~RNF_ONLINK; + } + break; + default: bug("Invalid static attribute access (%u/%u)", sa.f_type, sa.sa_code); } |