#include <sys/socket.h>
#include <linux/if.h>
+#include <linux/mpls.h>
//#include <vlib/vlib.h>
#include <vlib/unix/plugin.h>
#include <netlink/route/link.h>
#include <netlink/route/route.h>
#include <netlink/route/neighbour.h>
+#include <netlink/route/nexthop.h>
#include <netlink/route/addr.h>
#include <netlink/route/link/vlan.h>
vnet_sw_interface_set_mtu (vnm, sw->sw_if_index, mtu);
}
+static walk_rc_t
+lcp_router_link_addr_adj_upd_cb (vnet_main_t *vnm, u32 sw_if_index, void *arg)
+{
+ lcp_itf_pair_t *lip;
+
+ lip = lcp_itf_pair_get (lcp_itf_pair_find_by_phy (sw_if_index));
+ if (!lip)
+ {
+ return WALK_CONTINUE;
+ }
+
+ vnet_update_adjacency_for_sw_interface (vnm, lip->lip_phy_sw_if_index,
+ lip->lip_phy_adjs.adj_index[AF_IP4]);
+ vnet_update_adjacency_for_sw_interface (vnm, lip->lip_phy_sw_if_index,
+ lip->lip_phy_adjs.adj_index[AF_IP6]);
+
+ return WALK_CONTINUE;
+}
+
static void
lcp_router_link_addr (struct rtnl_link *rl, lcp_itf_pair_t *lip)
{
mac_addr_bytes);
/* mcast adjacencies need to be updated */
- vnet_update_adjacency_for_sw_interface (vnm, lip->lip_phy_sw_if_index,
- lip->lip_phy_adjs.adj_index[AF_IP4]);
- vnet_update_adjacency_for_sw_interface (vnm, lip->lip_phy_sw_if_index,
- lip->lip_phy_adjs.adj_index[AF_IP6]);
+ vnet_hw_interface_walk_sw (vnm, hw->hw_if_index,
+ lcp_router_link_addr_adj_upd_cb, NULL);
}
static void lcp_router_table_flush (lcp_router_table_t *nlt,
lip->lip_phy_sw_if_index);
return;
}
+
+ /* pool could grow during the previous operation */
+ lip = lcp_itf_pair_get (lipi);
+
/* create the vlan interface on the parent host */
if (vnet_create_sub_interface (lip->lip_host_sw_if_index, vlan, 18,
0, vlan, &sub_host_sw_if_index))
static fib_protocol_t
lcp_router_proto_k2f (uint32_t k)
{
- if (AF_INET6 == k)
- return (FIB_PROTOCOL_IP6);
- return (FIB_PROTOCOL_IP4);
+ switch (k)
+ {
+ case AF_INET6:
+ return FIB_PROTOCOL_IP6;
+ case AF_INET:
+ return FIB_PROTOCOL_IP4;
+ case AF_MPLS:
+ return FIB_PROTOCOL_MPLS;
+ default:
+ ASSERT (0);
+ return FIB_PROTOCOL_NONE;
+ }
}
static void
ip_address_reset (ia);
fproto = lcp_router_proto_k2f (nl_addr_get_family (rna));
+ ASSERT (FIB_PROTOCOL_MPLS != fproto);
ip_address_set (ia, nl_addr_get_binary_addr (rna),
FIB_PROTOCOL_IP4 == fproto ? AF_IP4 : AF_IP6);
fib_protocol_t fproto;
fproto = lcp_router_proto_k2f (nl_addr_get_family (rna));
+ ASSERT (FIB_PROTOCOL_MPLS != fproto);
+
ip46_address_reset (ia);
if (FIB_PROTOCOL_IP4 == fproto)
memcpy (&ia->ip4, nl_addr_get_binary_addr (rna), nl_addr_get_len (rna));
lcp_router_link_addr_add_del (la, 0);
}
+static walk_rc_t
+lcp_router_address_mark (index_t index, void *ctx)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+
+ lcp_itf_pair_t *lip = lcp_itf_pair_get (index);
+ if (!lip)
+ return WALK_CONTINUE;
+
+ ip_interface_address_mark_one_interface (
+ vnm, vnet_get_sw_interface (vnm, lip->lip_phy_sw_if_index), 0);
+
+ return WALK_CONTINUE;
+}
+
static void
lcp_router_link_addr_sync_begin (void)
{
- ip_interface_address_mark ();
+ lcp_itf_pair_walk (lcp_router_address_mark, 0);
LCP_ROUTER_INFO ("Begin synchronization of interface addresses");
}
{
ip_address_t nh;
int rv;
+ struct nl_addr *rna;
- lcp_router_mk_addr (rtnl_neigh_get_dst (rn), &nh);
+ if ((rna = rtnl_neigh_get_dst (rn)) == NULL)
+ return;
+ lcp_router_mk_addr (rna, &nh);
if (ip46_address_is_multicast (&ip_addr_46 (&nh)))
{
struct nl_addr *ll;
ip_address_t nh;
int state;
+ struct nl_addr *rna;
- lcp_router_mk_addr (rtnl_neigh_get_dst (rn), &nh);
+ if ((rna = rtnl_neigh_get_dst (rn)) == NULL)
+ return;
+ lcp_router_mk_addr (rna, &nh);
if (ip46_address_is_multicast (&ip_addr_46 (&nh)))
{
rtnl_neigh_get_ifindex (rn));
}
+static walk_rc_t
+lcp_router_neighbor_mark (index_t index, void *ctx)
+{
+ lcp_itf_pair_t *lip = lcp_itf_pair_get (index);
+ if (!lip)
+ return WALK_CONTINUE;
+
+ ip_neighbor_walk (AF_IP4, lip->lip_phy_sw_if_index, ip_neighbor_mark_one, 0);
+ ip_neighbor_walk (AF_IP6, lip->lip_phy_sw_if_index, ip_neighbor_mark_one, 0);
+
+ return WALK_CONTINUE;
+}
+
static void
lcp_router_neigh_sync_begin (void)
{
- ip_neighbor_mark (AF_IP4);
- ip_neighbor_mark (AF_IP6);
+ lcp_itf_pair_walk (lcp_router_neighbor_mark, 0);
LCP_ROUTER_INFO ("Begin synchronization of neighbors");
}
lcp_router_route_mk_prefix (struct rtnl_route *r, fib_prefix_t *p)
{
const struct nl_addr *addr = rtnl_route_get_dst (r);
+ u32 *baddr = nl_addr_get_binary_addr (addr);
+ u32 blen = nl_addr_get_len (addr);
+ ip46_address_t *paddr = &p->fp_addr;
+ u32 entry;
+
+ p->fp_proto = lcp_router_proto_k2f (nl_addr_get_family (addr));
+
+ switch (p->fp_proto)
+ {
+ case FIB_PROTOCOL_MPLS:
+ entry = ntohl (*baddr);
+ p->fp_label = (entry & MPLS_LS_LABEL_MASK) >> MPLS_LS_LABEL_SHIFT;
+ p->fp_len = 21;
+ p->fp_eos = MPLS_NON_EOS;
+ return;
+ case FIB_PROTOCOL_IP4:
+ ip46_address_reset (paddr);
+ memcpy (&paddr->ip4, baddr, blen);
+ break;
+ case FIB_PROTOCOL_IP6:
+ memcpy (&paddr->ip6, baddr, blen);
+ break;
+ }
p->fp_len = nl_addr_get_prefixlen (addr);
- p->fp_proto = lcp_router_mk_addr46 (addr, &p->fp_addr);
}
static void
p->fp_proto = lcp_router_mk_addr46 (addr, &p->fp_src_addr);
}
+static int
+lcp_router_mpls_nladdr_to_path (fib_route_path_t *path, struct nl_addr *addr)
+{
+ if (!addr)
+ return 0;
+
+ struct mpls_label *stack = nl_addr_get_binary_addr (addr);
+ u32 entry, label;
+ u8 exp, ttl;
+ int label_count = 0;
+
+ while (1)
+ {
+ entry = ntohl (stack[label_count++].entry);
+ label = (entry & MPLS_LS_LABEL_MASK) >> MPLS_LS_LABEL_SHIFT;
+ exp = (entry & MPLS_LS_TC_MASK) >> MPLS_LS_TC_SHIFT;
+ ttl = (entry & MPLS_LS_TTL_MASK) >> MPLS_LS_TTL_SHIFT;
+
+ fib_mpls_label_t fml = {
+ .fml_value = label,
+ .fml_exp = exp,
+ .fml_ttl = ttl,
+ };
+ vec_add1 (path->frp_label_stack, fml);
+
+ if (entry & MPLS_LS_S_MASK)
+ break;
+ }
+ return label_count;
+}
+
typedef struct lcp_router_route_path_parse_t_
{
fib_route_path_t *paths;
lcp_router_route_path_parse_t *ctx = arg;
fib_route_path_t *path;
u32 sw_if_index;
+ int label_count = 0;
sw_if_index = lcp_router_intf_h2p (rtnl_route_nh_get_ifindex (rnh));
path->frp_flags = FIB_ROUTE_PATH_FLAG_NONE | ctx->type_flags;
path->frp_sw_if_index = sw_if_index;
- path->frp_weight = rtnl_route_nh_get_weight (rnh);
path->frp_preference = ctx->preference;
+ /*
+ * FIB Path Weight of 0 is meaningless and replaced with 1 further along.
+ * See fib_path_create. fib_path_cmp_w_route_path would fail to match
+ * such a fib_route_path_t with any fib_path_t, because a fib_path_t's
+ * fp_weight can never be 0.
+ */
+ path->frp_weight = clib_max (1, rtnl_route_nh_get_weight (rnh));
+
addr = rtnl_route_nh_get_gateway (rnh);
+ if (!addr)
+ addr = rtnl_route_nh_get_via (rnh);
if (addr)
- fproto = lcp_router_mk_addr46 (rtnl_route_nh_get_gateway (rnh),
- &path->frp_addr);
+ fproto = lcp_router_mk_addr46 (addr, &path->frp_addr);
else
fproto = ctx->route_proto;
path->frp_proto = fib_proto_to_dpo (fproto);
+ if (ctx->route_proto == FIB_PROTOCOL_MPLS)
+ {
+ addr = rtnl_route_nh_get_newdst (rnh);
+ label_count = lcp_router_mpls_nladdr_to_path (path, addr);
+ if (label_count)
+ {
+ LCP_ROUTER_DBG (" is label swap to %u",
+ path->frp_label_stack[0].fml_value);
+ }
+ else
+ {
+ fib_mpls_label_t fml = {
+ .fml_value = MPLS_LABEL_POP,
+ };
+ vec_add1 (path->frp_label_stack, fml);
+ LCP_ROUTER_DBG (" is label pop");
+ }
+ }
+
+#ifdef NL_CAPABILITY_VERSION_3_6_0
+ addr = rtnl_route_nh_get_encap_mpls_dst (rnh);
+ label_count = lcp_router_mpls_nladdr_to_path (path, addr);
+ if (label_count)
+ LCP_ROUTER_DBG (" has encap mpls, %d labels", label_count);
+#endif
+
if (ctx->is_mcast)
path->frp_mitf_flags = MFIB_ITF_FLAG_FORWARD;
fib_src = lcp_router_proto_fib_source (rproto);
- if (pfx.fp_proto == FIB_PROTOCOL_IP6)
- fib_table_entry_delete (nlt->nlt_fib_index, &pfx, fib_src);
- else
- fib_table_entry_path_remove2 (nlt->nlt_fib_index, &pfx, fib_src,
- np.paths);
+ switch (pfx.fp_proto)
+ {
+ case FIB_PROTOCOL_IP6:
+ fib_table_entry_delete (nlt->nlt_fib_index, &pfx, fib_src);
+ break;
+ case FIB_PROTOCOL_MPLS:
+ fib_table_entry_path_remove2 (nlt->nlt_fib_index, &pfx, fib_src,
+ np.paths);
+ /* delete the EOS route in addition to NEOS - fallthrough */
+ pfx.fp_eos = MPLS_EOS;
+ default:
+ fib_table_entry_path_remove2 (nlt->nlt_fib_index, &pfx, fib_src,
+ np.paths);
+ }
}
vec_free (np.paths);
lcp_router_table_unlock (nlt);
}
+static fib_route_path_t *
+lcp_router_fib_route_path_dup (fib_route_path_t *old)
+{
+ int idx;
+ fib_route_path_t *p;
+
+ fib_route_path_t *new = vec_dup (old);
+ if (!new)
+ return NULL;
+
+ for (idx = 0; idx < vec_len (new); idx++)
+ {
+ p = &new[idx];
+ if (p->frp_label_stack)
+ p->frp_label_stack = vec_dup (p->frp_label_stack);
+ }
+
+ return new;
+}
+
static void
-lcp_router_route_add (struct rtnl_route *rr)
+lcp_router_route_add (struct rtnl_route *rr, int is_replace)
{
fib_entry_flag_t entry_flags;
uint32_t table_id;
LCP_ROUTER_DBG ("route skip: %d:%U %U", rtnl_route_get_table (rr),
format_fib_prefix, &pfx, format_fib_entry_flags,
entry_flags);
+ return;
}
- else
- {
- LCP_ROUTER_DBG ("route add: %d:%U %U", rtnl_route_get_table (rr),
- format_fib_prefix, &pfx, format_fib_entry_flags,
- entry_flags);
+ LCP_ROUTER_DBG ("route %s: %d:%U %U", is_replace ? "replace" : "add",
+ rtnl_route_get_table (rr), format_fib_prefix, &pfx,
+ format_fib_entry_flags, entry_flags);
- lcp_router_route_path_parse_t np = {
- .route_proto = pfx.fp_proto,
- .is_mcast = (rtype == RTN_MULTICAST),
- .type_flags = lcp_router_route_type_frpflags[rtype],
- .preference = (u8) rtnl_route_get_priority (rr),
- };
+ lcp_router_route_path_parse_t np = {
+ .route_proto = pfx.fp_proto,
+ .is_mcast = (rtype == RTN_MULTICAST),
+ .type_flags = lcp_router_route_type_frpflags[rtype],
+ .preference = (u8) rtnl_route_get_priority (rr),
+ };
- rtnl_route_foreach_nexthop (rr, lcp_router_route_path_parse, &np);
- lcp_router_route_path_add_special (rr, &np);
+ rtnl_route_foreach_nexthop (rr, lcp_router_route_path_parse, &np);
+ lcp_router_route_path_add_special (rr, &np);
- if (0 != vec_len (np.paths))
+ if (0 != vec_len (np.paths))
+ {
+ if (rtype == RTN_MULTICAST)
{
- if (rtype == RTN_MULTICAST)
- {
- /* it's not clear to me how linux expresses the RPF paramters
- * so we'll allow from all interfaces and hope for the best */
- mfib_prefix_t mpfx = {};
+ /* it's not clear to me how linux expresses the RPF paramters
+ * so we'll allow from all interfaces and hope for the best */
+ mfib_prefix_t mpfx = {};
- lcp_router_route_mk_mprefix (rr, &mpfx);
+ lcp_router_route_mk_mprefix (rr, &mpfx);
- mfib_table_entry_update (
- nlt->nlt_mfib_index, &mpfx, MFIB_SOURCE_PLUGIN_LOW,
- MFIB_RPF_ID_NONE, MFIB_ENTRY_FLAG_ACCEPT_ALL_ITF);
+ mfib_table_entry_update (nlt->nlt_mfib_index, &mpfx,
+ MFIB_SOURCE_PLUGIN_LOW, MFIB_RPF_ID_NONE,
+ MFIB_ENTRY_FLAG_ACCEPT_ALL_ITF);
- mfib_table_entry_paths_update (nlt->nlt_mfib_index, &mpfx,
- MFIB_SOURCE_PLUGIN_LOW,
- MFIB_ENTRY_FLAG_NONE, np.paths);
- }
- else
+ mfib_table_entry_paths_update (nlt->nlt_mfib_index, &mpfx,
+ MFIB_SOURCE_PLUGIN_LOW,
+ MFIB_ENTRY_FLAG_NONE, np.paths);
+ }
+ else
+ {
+ fib_source_t fib_src;
+ const fib_route_path_t *rpath;
+
+ vec_foreach (rpath, np.paths)
{
- fib_source_t fib_src;
+ if (fib_route_path_is_attached (rpath))
+ {
+ entry_flags |= FIB_ENTRY_FLAG_ATTACHED;
+ break;
+ }
+ }
- fib_src = lcp_router_proto_fib_source (rproto);
+ fib_src = lcp_router_proto_fib_source (rproto);
- if (pfx.fp_proto == FIB_PROTOCOL_IP6)
- fib_table_entry_path_add2 (nlt->nlt_fib_index, &pfx, fib_src,
- entry_flags, np.paths);
- else
+ if (pfx.fp_proto == FIB_PROTOCOL_MPLS)
+ {
+ /* in order to avoid double-frees, we duplicate the paths. */
+ fib_route_path_t *pathdup =
+ lcp_router_fib_route_path_dup (np.paths);
+ if (is_replace)
fib_table_entry_update (nlt->nlt_fib_index, &pfx, fib_src,
- entry_flags, np.paths);
+ entry_flags, pathdup);
+ else
+ fib_table_entry_path_add2 (nlt->nlt_fib_index, &pfx, fib_src,
+ entry_flags, pathdup);
+ vec_free (pathdup);
+
+ /* install EOS route in addition to NEOS */
+ pfx.fp_eos = MPLS_EOS;
+ pfx.fp_payload_proto = np.paths[0].frp_proto;
}
+
+ if (is_replace)
+ fib_table_entry_update (nlt->nlt_fib_index, &pfx, fib_src,
+ entry_flags, np.paths);
+ else
+ fib_table_entry_path_add2 (nlt->nlt_fib_index, &pfx, fib_src,
+ entry_flags, np.paths);
}
- else
- LCP_ROUTER_DBG ("no paths for route add: %d:%U %U",
- rtnl_route_get_table (rr), format_fib_prefix, &pfx,
- format_fib_entry_flags, entry_flags);
- vec_free (np.paths);
}
+ else
+ {
+ LCP_ROUTER_DBG ("no paths for route: %d:%U %U",
+ rtnl_route_get_table (rr), format_fib_prefix, &pfx,
+ format_fib_entry_flags, entry_flags);
+ }
+ vec_free (np.paths);
}
static void
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