diff options
Diffstat (limited to 'src/vnet/dpo/ip6_ll_dpo.c')
| -rw-r--r-- | src/vnet/dpo/ip6_ll_dpo.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/src/vnet/dpo/ip6_ll_dpo.c b/src/vnet/dpo/ip6_ll_dpo.c new file mode 100644 index 00000000000..f86472c16c5 --- /dev/null +++ b/src/vnet/dpo/ip6_ll_dpo.c @@ -0,0 +1,203 @@ +/* + * Copyright (c) 2018 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +/** + * @brief + * The data-path object representing performing a lookup in the IPv6 + * link local table + */ + +#include <vnet/dpo/ip6_ll_dpo.h> +#include <vnet/ip/ip6_ll_table.h> + +/** + * @brief the IP6 link-local DPO is global + */ +static dpo_id_t ip6_ll_dpo = { + .dpoi_type = DPO_IP6_LL, + .dpoi_proto = DPO_PROTO_IP6, + .dpoi_index = 0, +}; + +const dpo_id_t * +ip6_ll_dpo_get (void) +{ + return (&ip6_ll_dpo); +} + +static void +ip6_ll_dpo_lock (dpo_id_t * dpo) +{ + /* + * not maintaining a lock count on the ip6_ll, they are const global and + * never die. + */ +} + +static void +ip6_ll_dpo_unlock (dpo_id_t * dpo) +{ +} + +static u8 * +format_ip6_ll_dpo (u8 * s, va_list * ap) +{ + CLIB_UNUSED (index_t index) = va_arg (*ap, index_t); + CLIB_UNUSED (u32 indent) = va_arg (*ap, u32); + + return (format (s, "ip6-link-local")); +} + +const static dpo_vft_t ip6_ll_vft = { + .dv_lock = ip6_ll_dpo_lock, + .dv_unlock = ip6_ll_dpo_unlock, + .dv_format = format_ip6_ll_dpo, +}; + +/** + * @brief The per-protocol VLIB graph nodes that are assigned to a ip6_ll + * object. + * + * this means that these graph nodes are ones from which a ip6_ll is the + * parent object in the DPO-graph. + */ +const static char *const ip6_null_nodes[] = { + "ip6-link-local", + NULL, +}; + +const static char *const *const ip6_ll_nodes[DPO_PROTO_NUM] = { + [DPO_PROTO_IP6] = ip6_null_nodes, +}; + +typedef struct ip6_ll_dpo_trace_t_ +{ + u32 fib_index; + u32 sw_if_index; +} ip6_ll_dpo_trace_t; + +/** + * @brief Exit nodes from a IP6_LL + */ +typedef enum ip6_ll_next_t_ +{ + IP6_LL_NEXT_DROP, + IP6_LL_NEXT_LOOKUP, + IP6_LL_NEXT_NUM, +} ip6_ll_next_t; + +always_inline uword +ip6_ll_dpo_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + u32 n_left_from, next_index, *from, *to_next; + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + next_index = node->cached_next_index; + + while (n_left_from > 0) + { + u32 n_left_to_next; + + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0, fib_index0, next0; + vlib_buffer_t *p0; + + bi0 = from[0]; + to_next[0] = bi0; + from += 1; + to_next += 1; + n_left_from -= 1; + n_left_to_next -= 1; + next0 = IP6_LL_NEXT_LOOKUP; + + p0 = vlib_get_buffer (vm, bi0); + + /* use the packet's RX interface to pick the link-local FIB */ + fib_index0 = + ip6_ll_fib_get (vnet_buffer (p0)->sw_if_index[VLIB_RX]); + /* write that fib index into the packet so it's used in the + * lookup node next */ + vnet_buffer (p0)->sw_if_index[VLIB_TX] = fib_index0; + + if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED)) + { + ip6_ll_dpo_trace_t *tr = vlib_add_trace (vm, node, p0, + sizeof (*tr)); + tr->sw_if_index = vnet_buffer (p0)->sw_if_index[VLIB_RX]; + tr->fib_index = fib_index0; + } + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, + n_left_to_next, bi0, next0); + } + + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + + return frame->n_vectors; +} + +static u8 * +format_ip6_ll_dpo_trace (u8 * s, va_list * args) +{ + CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); + CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); + ip6_ll_dpo_trace_t *t = va_arg (*args, ip6_ll_dpo_trace_t *); + + s = format (s, "sw_if_index:%d fib_index:%d", t->sw_if_index, t->fib_index); + return s; +} + +static uword +ip6_ll_dpo_switch (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + return (ip6_ll_dpo_inline (vm, node, frame)); +} + +/** + * @brief + */ +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (ip6_ll_dpo_node) = +{ + .function = ip6_ll_dpo_switch, + .name = "ip6-link-local", + .vector_size = sizeof (u32), + .format_trace = format_ip6_ll_dpo_trace, + .n_next_nodes = IP6_LL_NEXT_NUM, + .next_nodes = { + [IP6_LL_NEXT_DROP] = "ip6-drop", + [IP6_LL_NEXT_LOOKUP] = "ip6-lookup", + }, +}; +/* *INDENT-ON* */ + +void +ip6_ll_dpo_module_init (void) +{ + dpo_register (DPO_IP6_LL, &ip6_ll_vft, ip6_ll_nodes); +} + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |