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Merge commit '48bc232f08141d26691237c3d79db587ce16932b' into integrated
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commit
bae021db1d
@ -1329,6 +1329,11 @@ for each neighbor using the following configuration parameters:
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circumvent misconfigurations of other routers. Default:
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circumvent misconfigurations of other routers. Default:
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disabled.
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disabled.
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<tag>next hop keep</tag> Forward the received Next Hop
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attribute even in situations where the local address should be
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used instead, like when the route is sent to an interface with
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a different subnet. Default: disabled.
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<tag>missing lladdr self|drop|ignore</tag>Next Hop attribute
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<tag>missing lladdr self|drop|ignore</tag>Next Hop attribute
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in BGP-IPv6 sometimes contains just the global IPv6 address,
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in BGP-IPv6 sometimes contains just the global IPv6 address,
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but sometimes it has to contain both global and link-local
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but sometimes it has to contain both global and link-local
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@ -935,7 +935,8 @@ bgp_create_attrs(struct bgp_proto *p, rte *e, ea_list **attrs, struct linpool *p
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rta->dest != RTD_ROUTER ||
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rta->dest != RTD_ROUTER ||
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ipa_equal(rta->gw, IPA_NONE) ||
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ipa_equal(rta->gw, IPA_NONE) ||
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ipa_has_link_scope(rta->gw) ||
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ipa_has_link_scope(rta->gw) ||
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(!p->is_internal && (!p->neigh || (rta->iface != p->neigh->iface))))
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(!p->is_internal && !p->cf->next_hop_keep &&
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(!p->neigh || (rta->iface != p->neigh->iface))))
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set_next_hop(z, p->source_addr);
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set_next_hop(z, p->source_addr);
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else
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else
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set_next_hop(z, rta->gw);
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set_next_hop(z, rta->gw);
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@ -1003,10 +1004,13 @@ bgp_update_attrs(struct bgp_proto *p, rte *e, ea_list **attrs, struct linpool *p
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/* iBGP -> keep next_hop, eBGP multi-hop -> use source_addr,
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/* iBGP -> keep next_hop, eBGP multi-hop -> use source_addr,
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* eBGP single-hop -> keep next_hop if on the same iface.
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* eBGP single-hop -> keep next_hop if on the same iface.
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* If the next_hop is zero (i.e. link-local), keep only if on the same iface.
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* If the next_hop is zero (i.e. link-local), keep only if on the same iface.
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*
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* Note that same-iface-check uses iface from route, which is based on gw.
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*/
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*/
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a = ea_find(e->attrs->eattrs, EA_CODE(EAP_BGP, BA_NEXT_HOP));
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a = ea_find(e->attrs->eattrs, EA_CODE(EAP_BGP, BA_NEXT_HOP));
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if (a && !p->cf->next_hop_self &&
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if (a && !p->cf->next_hop_self &&
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((p->is_internal && ipa_nonzero(*((ip_addr *) a->u.ptr->data))) ||
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(p->cf->next_hop_keep ||
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(p->is_internal && ipa_nonzero(*((ip_addr *) a->u.ptr->data))) ||
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(p->neigh && (e->attrs->iface == p->neigh->iface))))
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(p->neigh && (e->attrs->iface == p->neigh->iface))))
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{
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{
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/* Leave the original next hop attribute, will check later where does it point */
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/* Leave the original next hop attribute, will check later where does it point */
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@ -24,6 +24,7 @@ struct bgp_config {
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int multihop; /* Number of hops if multihop */
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int multihop; /* Number of hops if multihop */
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int ttl_security; /* Enable TTL security [RFC5082] */
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int ttl_security; /* Enable TTL security [RFC5082] */
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int next_hop_self; /* Always set next hop to local IP address */
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int next_hop_self; /* Always set next hop to local IP address */
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int next_hop_keep; /* Do not touch next hop attribute */
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int missing_lladdr; /* What we will do when we don' know link-local addr, see MLL_* */
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int missing_lladdr; /* What we will do when we don' know link-local addr, see MLL_* */
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int gw_mode; /* How we compute route gateway from next_hop attr, see GW_* */
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int gw_mode; /* How we compute route gateway from next_hop attr, see GW_* */
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int compare_path_lengths; /* Use path lengths when selecting best route */
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int compare_path_lengths; /* Use path lengths when selecting best route */
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@ -76,7 +76,8 @@ bgp_proto:
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| bgp_proto KEEPALIVE TIME expr ';' { BGP_CFG->keepalive_time = $4; }
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| bgp_proto KEEPALIVE TIME expr ';' { BGP_CFG->keepalive_time = $4; }
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| bgp_proto MULTIHOP ';' { BGP_CFG->multihop = 64; }
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| bgp_proto MULTIHOP ';' { BGP_CFG->multihop = 64; }
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| bgp_proto MULTIHOP expr ';' { BGP_CFG->multihop = $3; if (($3<1) || ($3>255)) cf_error("Multihop must be in range 1-255"); }
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| bgp_proto MULTIHOP expr ';' { BGP_CFG->multihop = $3; if (($3<1) || ($3>255)) cf_error("Multihop must be in range 1-255"); }
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| bgp_proto NEXT HOP SELF ';' { BGP_CFG->next_hop_self = 1; }
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| bgp_proto NEXT HOP SELF ';' { BGP_CFG->next_hop_self = 1; BGP_CFG->next_hop_keep = 0; }
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| bgp_proto NEXT HOP KEEP ';' { BGP_CFG->next_hop_keep = 1; BGP_CFG->next_hop_self = 0; }
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| bgp_proto MISSING LLADDR SELF ';' { BGP_CFG->missing_lladdr = MLL_SELF; }
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| bgp_proto MISSING LLADDR SELF ';' { BGP_CFG->missing_lladdr = MLL_SELF; }
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| bgp_proto MISSING LLADDR DROP ';' { BGP_CFG->missing_lladdr = MLL_DROP; }
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| bgp_proto MISSING LLADDR DROP ';' { BGP_CFG->missing_lladdr = MLL_DROP; }
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| bgp_proto MISSING LLADDR IGNORE ';' { BGP_CFG->missing_lladdr = MLL_IGNORE; }
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| bgp_proto MISSING LLADDR IGNORE ';' { BGP_CFG->missing_lladdr = MLL_IGNORE; }
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