diff options
Diffstat (limited to 'zebra')
| -rw-r--r-- | zebra/zebra_srv6.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/zebra/zebra_srv6.c b/zebra/zebra_srv6.c index 6d228c5e24..51efcceb75 100644 --- a/zebra/zebra_srv6.c +++ b/zebra/zebra_srv6.c @@ -18,6 +18,7 @@ #include "zebra/zebra_srv6.h" #include "zebra/zebra_errors.h" #include "zebra/ge_netlink.h" +#include "zebra/interface.h" #include <stdio.h> #include <string.h> @@ -1745,6 +1746,13 @@ int get_srv6_sid(struct zebra_srv6_sid **sid, struct srv6_sid_ctx *ctx, int ret = -1; struct srv6_locator *locator; char buf[256]; + struct nhg_connected *rb_node_dep = NULL; + struct listnode *node; + struct nexthop *nexthop; + struct nbr_connected *nc; + bool found = false; + struct interface *ifp; + struct zebra_if *zebra_if; enum srv6_sid_alloc_mode alloc_mode = (sid_value) ? SRV6_SID_ALLOC_MODE_EXPLICIT @@ -1755,6 +1763,44 @@ int get_srv6_sid(struct zebra_srv6_sid **sid, struct srv6_sid_ctx *ctx, __func__, srv6_sid_ctx2str(buf, sizeof(buf), ctx), sid_value, srv6_sid_alloc_mode2str(alloc_mode)); + if (ctx->ifindex != 0 && IPV6_ADDR_SAME(&ctx->nh6, &in6addr_any)) { + ifp = if_lookup_by_index(ctx->ifindex, VRF_DEFAULT); + if (!ifp) { + zlog_err("%s: interface %u does not exist", __func__, ctx->ifindex); + return -1; + } + + for (ALL_LIST_ELEMENTS_RO(ifp->nbr_connected, node, nc)) + if (nc->address && nc->address->family == AF_INET6 && + IN6_IS_ADDR_LINKLOCAL(&nc->address->u.prefix6)) { + ctx->nh6 = nc->address->u.prefix6; + found = true; + break; + } + + if (!found) { + zebra_if = ifp->info; + + frr_each (nhg_connected_tree, &zebra_if->nhg_dependents, rb_node_dep) { + for (ALL_NEXTHOPS(rb_node_dep->nhe->nhg, nexthop)) { + /* skip non link-local addresses */ + if (!IPV6_ADDR_SAME(&nexthop->gate.ipv6, &in6addr_any)) { + ctx->nh6 = nexthop->gate.ipv6; + found = true; + break; + } + } + if (found) + break; + } + if (!found) { + zlog_err("%s: cannot get SID, interface (ifindex %u) not found", + __func__, ctx->ifindex); + return -1; + } + } + } + if (alloc_mode == SRV6_SID_ALLOC_MODE_EXPLICIT) { /* * Explicit SID allocation: allocate a specific SID value |