#include <vnet/fib/fib_path_list.h>
#include <vnet/fib/fib_internal.h>
+const char *fib_path_ext_adj_flags_names[] = FIB_PATH_EXT_ADJ_ATTR_NAMES;
+const char *fib_path_ext_mpls_flags_names[] = FIB_PATH_EXT_MPLS_ATTR_NAMES;
+
u8 *
format_fib_path_ext (u8 * s, va_list * args)
{
path_ext = va_arg (*args, fib_path_ext_t *);
- s = format(s, "path:%d labels:",
- path_ext->fpe_path_index);
- for (ii = 0; ii < vec_len(path_ext->fpe_path.frp_label_stack); ii++)
+ s = format(s, "path:%d ", path_ext->fpe_path_index);
+
+ switch (path_ext->fpe_type)
{
- s = format(s, "%U ",
- format_mpls_unicast_label,
- path_ext->fpe_path.frp_label_stack[ii]);
+ case FIB_PATH_EXT_MPLS: {
+ fib_path_ext_mpls_attr_t attr;
+
+ if (path_ext->fpe_mpls_flags)
+ {
+ s = format(s, "mpls-flags:[");
+
+ FOR_EACH_PATH_EXT_MPLS_ATTR(attr)
+ {
+ if ((1<<attr) & path_ext->fpe_mpls_flags) {
+ s = format(s, "%s", fib_path_ext_mpls_flags_names[attr]);
+ }
+ }
+ s = format(s, "]");
+ }
+ s = format(s, " labels:[");
+ for (ii = 0; ii < vec_len(path_ext->fpe_path.frp_label_stack); ii++)
+ {
+ s = format(s, "[%U]",
+ format_fib_mpls_label,
+ &path_ext->fpe_path.frp_label_stack[ii]);
+ }
+ s = format(s, "]");
+ break;
+ }
+ case FIB_PATH_EXT_ADJ: {
+ fib_path_ext_adj_attr_t attr;
+
+ if (path_ext->fpe_adj_flags)
+ {
+ s = format(s, "adj-flags:[");
+ FOR_EACH_PATH_EXT_ADJ_ATTR(attr)
+ {
+ if ((1<<attr) & path_ext->fpe_adj_flags)
+ {
+ s = format(s, "%s", fib_path_ext_adj_flags_names[attr]);
+ }
+ }
+ s = format(s, "]");
+ }
+ break;
+ }
}
return (s);
}
return (fib_route_path_cmp(&path_ext->fpe_path, rpath));
}
-static int
+static fib_path_list_walk_rc_t
fib_path_ext_match (fib_node_index_t pl_index,
fib_node_index_t path_index,
void *ctx)
&path_ext->fpe_path))
{
path_ext->fpe_path_index = path_index;
- return (0);
+ return (FIB_PATH_LIST_WALK_STOP);
}
- // keep going
- return (1);
+ return (FIB_PATH_LIST_WALK_CONTINUE);
}
void
path_ext);
}
-void
+static void
fib_path_ext_init (fib_path_ext_t *path_ext,
fib_node_index_t path_list_index,
+ fib_path_ext_type_t ext_type,
const fib_route_path_t *rpath)
{
path_ext->fpe_path = *rpath;
path_ext->fpe_path_index = FIB_NODE_INDEX_INVALID;
+ path_ext->fpe_adj_flags = FIB_PATH_EXT_ADJ_FLAG_NONE;
+ path_ext->fpe_type = ext_type;
fib_path_ext_resolve(path_ext, path_list_index);
}
/**
* @brief Return true if the label stack is implicit null
+ * imp-null and pop equate to the same this as this level -
+ * the label is coming off.
*/
static int
fib_path_ext_is_imp_null (fib_path_ext_t *path_ext)
{
return ((1 == vec_len(path_ext->fpe_label_stack)) &&
- (MPLS_IETF_IMPLICIT_NULL_LABEL == path_ext->fpe_label_stack[0]));
+ ((MPLS_IETF_IMPLICIT_NULL_LABEL == path_ext->fpe_label_stack[0].fml_value) ||
+ (MPLS_LABEL_POP == path_ext->fpe_label_stack[0].fml_value)));
+}
+
+mpls_label_dpo_flags_t
+fib_path_ext_mpls_flags_to_mpls_label (fib_path_ext_mpls_flags_t fpe_flags)
+{
+ mpls_label_dpo_flags_t ml_flags = MPLS_LABEL_DPO_FLAG_NONE;
+
+ if (fpe_flags &FIB_PATH_EXT_MPLS_FLAG_NO_IP_TTL_DECR)
+ {
+ ml_flags |= MPLS_LABEL_DPO_FLAG_NO_IP_TTL_DECR;
+ }
+
+ return (ml_flags);
}
load_balance_path_t *
case FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS:
parent_fct = child_fct;
break;
+ case FIB_FORW_CHAIN_TYPE_ETHERNET:
+ parent_fct = FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS;
+ break;
default:
return (nhs);
break;
* we pickup the correct MPLS imposition nodes to do
* ip[46] processing.
*/
+ dpo_id_t parent = DPO_INVALID;
dpo_proto_t chain_proto;
mpls_eos_bit_t eos;
- index_t mldi;
eos = (child_fct == FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS ?
MPLS_NON_EOS :
MPLS_EOS);
chain_proto = fib_forw_chain_type_to_dpo_proto(child_fct);
- mldi = mpls_label_dpo_create(path_ext->fpe_label_stack,
- eos, 255, 0,
- chain_proto,
- &nh->path_dpo);
+ dpo_copy(&parent, &nh->path_dpo);
+ mpls_label_dpo_create(path_ext->fpe_label_stack,
+ eos,
+ chain_proto,
+ fib_path_ext_mpls_flags_to_mpls_label(
+ path_ext->fpe_mpls_flags),
+ &parent,
+ &nh->path_dpo);
- dpo_set(&nh->path_dpo,
- DPO_MPLS_LABEL,
- chain_proto,
- mldi);
+ dpo_reset(&parent);
}
+ else if (child_fct == FIB_FORW_CHAIN_TYPE_MPLS_EOS)
+ {
+ /*
+ * MPLS EOS packets using an imp-null. Insert the disposition.
+ */
+ fib_path_stack_mpls_disp(nh->path_index,
+ fib_forw_chain_type_to_dpo_proto(parent_fct),
+ path_ext->fpe_label_stack[0].fml_mode,
+ &nh->path_dpo);
+ }
}
dpo_reset(&via_dpo);
return (nhs);
}
+
+fib_path_ext_t *
+fib_path_ext_list_find (const fib_path_ext_list_t *list,
+ fib_path_ext_type_t ext_type,
+ const fib_route_path_t *rpath)
+{
+ fib_path_ext_t *path_ext;
+
+ vec_foreach(path_ext, list->fpel_exts)
+ {
+ if ((path_ext->fpe_type == ext_type) &&
+ !fib_path_ext_cmp(path_ext, rpath) )
+ {
+ return (path_ext);
+ }
+ }
+ return (NULL);
+}
+
+fib_path_ext_t *
+fib_path_ext_list_find_by_path_index (const fib_path_ext_list_t *list,
+ fib_node_index_t path_index)
+{
+ fib_path_ext_t *path_ext;
+
+ if (NULL != list)
+ {
+ vec_foreach(path_ext, list->fpel_exts)
+ {
+ if (path_ext->fpe_path_index == path_index)
+ {
+ return (path_ext);
+ }
+ }
+ }
+ return (NULL);
+}
+
+
+fib_path_ext_t *
+fib_path_ext_list_push_back (fib_path_ext_list_t *list,
+ fib_node_index_t path_list_index,
+ fib_path_ext_type_t ext_type,
+ const fib_route_path_t *rpath)
+{
+ fib_path_ext_t *path_ext;
+
+ path_ext = fib_path_ext_list_find(list, ext_type, rpath);
+
+ if (NULL == path_ext)
+ {
+ vec_add2(list->fpel_exts, path_ext, 1);
+ fib_path_ext_init(path_ext, path_list_index, ext_type, rpath);
+ }
+
+ return (path_ext);
+}
+
+/*
+ * insert, sorted, a path extension to the entry's list.
+ * It's not strictly necessary to sort the path extensions, since each
+ * extension has the path index to which it resolves. However, by being
+ * sorted the load-balance produced has a deterministic order, not an order
+ * based on the sequence of extension additions. this is a considerable benefit.
+ */
+fib_path_ext_t *
+fib_path_ext_list_insert (fib_path_ext_list_t *list,
+ fib_node_index_t path_list_index,
+ fib_path_ext_type_t ext_type,
+ const fib_route_path_t *rpath)
+{
+ fib_path_ext_t new_path_ext, *path_ext;
+ int i = 0;
+
+ if (0 == fib_path_ext_list_length(list))
+ {
+ return (fib_path_ext_list_push_back(list, path_list_index,
+ ext_type, rpath));
+ }
+
+ fib_path_ext_init(&new_path_ext, path_list_index, ext_type, rpath);
+
+ vec_foreach(path_ext, list->fpel_exts)
+ {
+ int res = fib_path_ext_cmp(path_ext, rpath);
+
+ if (0 == res)
+ {
+ /*
+ * don't add duplicate extensions. modify instead
+ */
+ vec_free(path_ext->fpe_label_stack);
+ *path_ext = new_path_ext;
+ goto done;
+ }
+ else if (res < 0)
+ {
+ i++;
+ }
+ else
+ {
+ break;
+ }
+ }
+ vec_insert_elts(list->fpel_exts, &new_path_ext, 1, i);
+done:
+ return (&(list->fpel_exts[i]));
+}
+
+void
+fib_path_ext_list_resolve (fib_path_ext_list_t *list,
+ fib_node_index_t path_list_index)
+{
+ fib_path_ext_t *path_ext;
+
+ vec_foreach(path_ext, list->fpel_exts)
+ {
+ fib_path_ext_resolve(path_ext, path_list_index);
+ };
+}
+
+void
+fib_path_ext_list_remove (fib_path_ext_list_t *list,
+ fib_path_ext_type_t ext_type,
+ const fib_route_path_t *rpath)
+{
+ fib_path_ext_t *path_ext;
+
+ path_ext = fib_path_ext_list_find(list, ext_type, rpath);
+
+ if (NULL != path_ext)
+ {
+ /*
+ * delete the element moving the remaining elements down 1 position.
+ * this preserves the sorted order.
+ */
+ vec_free(path_ext->fpe_label_stack);
+ vec_delete(list->fpel_exts, 1, (path_ext - list->fpel_exts));
+ }
+}
+
+void
+fib_path_ext_list_flush (fib_path_ext_list_t *list)
+{
+ fib_path_ext_t *path_ext;
+
+ vec_foreach(path_ext, list->fpel_exts)
+ {
+ vec_free(path_ext->fpe_label_stack);
+ };
+ vec_free(list->fpel_exts);
+ list->fpel_exts = NULL;
+}
+
+u8*
+format_fib_path_ext_list (u8 * s, va_list * args)
+{
+ fib_path_ext_list_t *list;
+ fib_path_ext_t *path_ext;
+
+ list = va_arg (*args, fib_path_ext_list_t *);
+
+ if (fib_path_ext_list_length(list))
+ {
+ s = format(s, " Extensions:");
+ vec_foreach(path_ext, list->fpel_exts)
+ {
+ s = format(s, "\n %U", format_fib_path_ext, path_ext);
+ };
+ }
+
+ return (s);
+}
+
+int
+fib_path_ext_list_length (const fib_path_ext_list_t *list)
+{
+ return (vec_len(list->fpel_exts));
+}
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