+++ /dev/null
-/*
- * Copyright (c) 2016 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.
- */
-/**
- * @file
- * @brief L2 LISP-GPE decap code.
- *
- */
-#include <vlib/vlib.h>
-#include <vnet/pg/pg.h>
-#include <vnet/lisp-gpe/lisp_gpe.h>
-
-typedef struct
-{
- u32 next_index;
- u32 tunnel_index;
- u32 error;
- lisp_gpe_header_t h;
-} lisp_gpe_rx_trace_t;
-
-static u8 *
-format_lisp_gpe_rx_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 *);
- lisp_gpe_rx_trace_t *t = va_arg (*args, lisp_gpe_rx_trace_t *);
-
- if (t->tunnel_index != ~0)
- {
- s = format (s, "LISP-GPE: tunnel %d next %d error %d", t->tunnel_index,
- t->next_index, t->error);
- }
- else
- {
- s = format (s, "LISP-GPE: no tunnel next %d error %d\n", t->next_index,
- t->error);
- }
- s = format (s, "\n %U", format_lisp_gpe_header_with_length, &t->h,
- (u32) sizeof (t->h) /* max size */ );
- return s;
-}
-
-static u32 next_proto_to_next_index[LISP_GPE_NEXT_PROTOS] = {
- LISP_GPE_INPUT_NEXT_DROP,
- LISP_GPE_INPUT_NEXT_IP4_INPUT,
- LISP_GPE_INPUT_NEXT_IP6_INPUT,
- LISP_GPE_INPUT_NEXT_L2_INPUT,
- LISP_GPE_INPUT_NEXT_DROP
-};
-
-always_inline u32
-next_protocol_to_next_index (lisp_gpe_header_t * lgh, u8 * next_header)
-{
- lisp_gpe_main_t *lgm = vnet_lisp_gpe_get_main ();
-
- /* lisp-gpe router */
- if (PREDICT_TRUE ((lgh->flags & LISP_GPE_FLAGS_P)
- || GPE_ENCAP_VXLAN == lgm->encap_mode))
- {
- if (PREDICT_FALSE (lgh->next_protocol >= LISP_GPE_NEXT_PROTOS))
- return LISP_GPE_INPUT_NEXT_DROP;
-
- return next_proto_to_next_index[lgh->next_protocol];
- }
- /* legacy lisp router */
- else if ((lgh->flags & LISP_GPE_FLAGS_P) == 0)
- {
- ip4_header_t *iph = (ip4_header_t *) next_header;
- if ((iph->ip_version_and_header_length & 0xF0) == 0x40)
- return LISP_GPE_INPUT_NEXT_IP4_INPUT;
- else if ((iph->ip_version_and_header_length & 0xF0) == 0x60)
- return LISP_GPE_INPUT_NEXT_IP6_INPUT;
- else
- return LISP_GPE_INPUT_NEXT_DROP;
- }
- else
- return LISP_GPE_INPUT_NEXT_DROP;
-}
-
-always_inline tunnel_lookup_t *
-next_index_to_iface (lisp_gpe_main_t * lgm, u32 next_index)
-{
- if (LISP_GPE_INPUT_NEXT_IP4_INPUT == next_index
- || LISP_GPE_INPUT_NEXT_IP6_INPUT == next_index)
- return &lgm->l3_ifaces;
- else if (LISP_GPE_INPUT_NEXT_L2_INPUT == next_index)
- return &lgm->l2_ifaces;
- else if (LISP_GPE_INPUT_NEXT_NSH_INPUT == next_index)
- return &lgm->nsh_ifaces;
- clib_warning ("next_index not associated to an interface!");
- return 0;
-}
-
-static_always_inline void
-incr_decap_stats (vnet_main_t * vnm, u32 thread_index, u32 length,
- u32 sw_if_index, u32 * last_sw_if_index, u32 * n_packets,
- u32 * n_bytes)
-{
- vnet_interface_main_t *im;
-
- if (PREDICT_TRUE (sw_if_index == *last_sw_if_index))
- {
- *n_packets += 1;
- *n_bytes += length;
- }
- else
- {
- if (PREDICT_TRUE (*last_sw_if_index != ~0))
- {
- im = &vnm->interface_main;
-
- vlib_increment_combined_counter (im->combined_sw_if_counters +
- VNET_INTERFACE_COUNTER_RX,
- thread_index, *last_sw_if_index,
- *n_packets, *n_bytes);
- }
- *last_sw_if_index = sw_if_index;
- *n_packets = 1;
- *n_bytes = length;
- }
-}
-
-/**
- * @brief LISP-GPE decap dispatcher.
- * @node lisp_gpe_input_inline
- *
- * LISP-GPE decap dispatcher.
- *
- * Decaps IP-UDP-LISP-GPE header and based on the next protocol and in the
- * GPE header and the vni decides the next node to forward the packet to.
- *
- * @param[in] vm vlib_main_t corresponding to current thread.
- * @param[in] node vlib_node_runtime_t data for this node.
- * @param[in] frame vlib_frame_t whose contents should be dispatched.
- *
- * @return number of vectors in frame.
- */
-static uword
-lisp_gpe_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
- vlib_frame_t * from_frame, u8 is_v4)
-{
- u32 n_left_from, next_index, *from, *to_next, thread_index;
- u32 n_bytes = 0, n_packets = 0, last_sw_if_index = ~0, drops = 0;
- lisp_gpe_main_t *lgm = vnet_lisp_gpe_get_main ();
-
- thread_index = vm->thread_index;
- from = vlib_frame_vector_args (from_frame);
- n_left_from = 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 >= 4 && n_left_to_next >= 2)
- {
- u32 bi0, bi1;
- vlib_buffer_t *b0, *b1;
- ip4_udp_lisp_gpe_header_t *iul4_0, *iul4_1;
- ip6_udp_lisp_gpe_header_t *iul6_0, *iul6_1;
- lisp_gpe_header_t *lh0, *lh1;
- u32 next0, next1, error0, error1;
- uword *si0, *si1;
- tunnel_lookup_t *tl0, *tl1;
-
- /* Prefetch next iteration. */
- {
- vlib_buffer_t *p2, *p3;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
-
- vlib_prefetch_buffer_header (p2, LOAD);
- vlib_prefetch_buffer_header (p3, LOAD);
-
- CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
- CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
- }
-
- bi0 = from[0];
- bi1 = from[1];
- to_next[0] = bi0;
- to_next[1] = bi1;
- from += 2;
- to_next += 2;
- n_left_to_next -= 2;
- n_left_from -= 2;
-
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
-
- /* udp leaves current_data pointing at the lisp header */
- if (is_v4)
- {
- vlib_buffer_advance (b0,
- -(word) (sizeof (udp_header_t) +
- sizeof (ip4_header_t)));
- vlib_buffer_advance (b1,
- -(word) (sizeof (udp_header_t) +
- sizeof (ip4_header_t)));
-
- iul4_0 = vlib_buffer_get_current (b0);
- iul4_1 = vlib_buffer_get_current (b1);
-
- /* pop (ip, udp, lisp-gpe) */
- vlib_buffer_advance (b0, sizeof (*iul4_0));
- vlib_buffer_advance (b1, sizeof (*iul4_1));
-
- lh0 = &iul4_0->lisp;
- lh1 = &iul4_1->lisp;
- }
- else
- {
- vlib_buffer_advance (b0,
- -(word) (sizeof (udp_header_t) +
- sizeof (ip6_header_t)));
- vlib_buffer_advance (b1,
- -(word) (sizeof (udp_header_t) +
- sizeof (ip6_header_t)));
-
- iul6_0 = vlib_buffer_get_current (b0);
- iul6_1 = vlib_buffer_get_current (b1);
-
- /* pop (ip, udp, lisp-gpe) */
- vlib_buffer_advance (b0, sizeof (*iul6_0));
- vlib_buffer_advance (b1, sizeof (*iul6_1));
-
- lh0 = &iul6_0->lisp;
- lh1 = &iul6_1->lisp;
- }
-
- /* determine next_index from lisp-gpe header */
- next0 = next_protocol_to_next_index (lh0,
- vlib_buffer_get_current (b0));
- next1 = next_protocol_to_next_index (lh1,
- vlib_buffer_get_current (b1));
-
- /* determine if tunnel is l2 or l3 */
- tl0 = next_index_to_iface (lgm, next0);
- tl1 = next_index_to_iface (lgm, next1);
-
- /* map iid/vni to lisp-gpe sw_if_index which is used by ipx_input to
- * decide the rx vrf and the input features to be applied */
- si0 = hash_get (tl0->sw_if_index_by_vni,
- clib_net_to_host_u32 (lh0->iid << 8));
- si1 = hash_get (tl1->sw_if_index_by_vni,
- clib_net_to_host_u32 (lh1->iid << 8));
-
-
- /* Required to make the l2 tag push / pop code work on l2 subifs */
- vnet_update_l2_len (b0);
- vnet_update_l2_len (b1);
-
- if (si0)
- {
- incr_decap_stats (lgm->vnet_main, thread_index,
- vlib_buffer_length_in_chain (vm, b0), si0[0],
- &last_sw_if_index, &n_packets, &n_bytes);
- vnet_buffer (b0)->sw_if_index[VLIB_RX] = si0[0];
- error0 = 0;
- }
- else
- {
- next0 = LISP_GPE_INPUT_NEXT_DROP;
- error0 = LISP_GPE_ERROR_NO_TUNNEL;
- drops++;
- }
-
- if (si1)
- {
- incr_decap_stats (lgm->vnet_main, thread_index,
- vlib_buffer_length_in_chain (vm, b1), si1[0],
- &last_sw_if_index, &n_packets, &n_bytes);
- vnet_buffer (b1)->sw_if_index[VLIB_RX] = si1[0];
- error1 = 0;
- }
- else
- {
- next1 = LISP_GPE_INPUT_NEXT_DROP;
- error1 = LISP_GPE_ERROR_NO_TUNNEL;
- drops++;
- }
-
- b0->error = error0 ? node->errors[error0] : 0;
- b1->error = error1 ? node->errors[error1] : 0;
-
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- lisp_gpe_rx_trace_t *tr = vlib_add_trace (vm, node, b0,
- sizeof (*tr));
- tr->next_index = next0;
- tr->error = error0;
- tr->h = lh0[0];
- }
-
- if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
- {
- lisp_gpe_rx_trace_t *tr = vlib_add_trace (vm, node, b1,
- sizeof (*tr));
- tr->next_index = next1;
- tr->error = error1;
- tr->h = lh1[0];
- }
-
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
- n_left_to_next, bi0, bi1, next0,
- next1);
- }
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0;
- ip4_udp_lisp_gpe_header_t *iul4_0;
- ip6_udp_lisp_gpe_header_t *iul6_0;
- lisp_gpe_header_t *lh0;
- u32 error0;
- uword *si0;
- tunnel_lookup_t *tl0;
-
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
-
- /* udp leaves current_data pointing at the lisp header
- * TODO: there's no difference in processing between v4 and v6
- * encapsulated packets so the code should be simplified if ip header
- * info is not going to be used for dp smrs/dpsec */
- if (is_v4)
- {
- vlib_buffer_advance (b0,
- -(word) (sizeof (udp_header_t) +
- sizeof (ip4_header_t)));
-
- iul4_0 = vlib_buffer_get_current (b0);
-
- /* pop (ip, udp, lisp-gpe) */
- vlib_buffer_advance (b0, sizeof (*iul4_0));
-
- lh0 = &iul4_0->lisp;
- }
- else
- {
- vlib_buffer_advance (b0,
- -(word) (sizeof (udp_header_t) +
- sizeof (ip6_header_t)));
-
- iul6_0 = vlib_buffer_get_current (b0);
-
- /* pop (ip, udp, lisp-gpe) */
- vlib_buffer_advance (b0, sizeof (*iul6_0));
-
- lh0 = &iul6_0->lisp;
- }
-
- /* TODO if security is to be implemented, something similar to RPF,
- * probably we'd like to check that the peer is allowed to send us
- * packets. For this, we should use the tunnel table OR check that
- * we have a mapping for the source eid and that the outer source of
- * the packet is one of its locators */
-
- /* determine next_index from lisp-gpe header */
- next0 = next_protocol_to_next_index (lh0,
- vlib_buffer_get_current (b0));
-
- /* determine if tunnel is l2 or l3 */
- tl0 = next_index_to_iface (lgm, next0);
-
- /* map iid/vni to lisp-gpe sw_if_index which is used by ipx_input to
- * decide the rx vrf and the input features to be applied.
- * NOTE: vni uses only the first 24 bits */
- si0 = hash_get (tl0->sw_if_index_by_vni,
- clib_net_to_host_u32 (lh0->iid << 8));
-
- /* Required to make the l2 tag push / pop code work on l2 subifs */
- vnet_update_l2_len (b0);
-
- if (si0)
- {
- incr_decap_stats (lgm->vnet_main, thread_index,
- vlib_buffer_length_in_chain (vm, b0), si0[0],
- &last_sw_if_index, &n_packets, &n_bytes);
- vnet_buffer (b0)->sw_if_index[VLIB_RX] = si0[0];
- error0 = 0;
- }
- else
- {
- next0 = LISP_GPE_INPUT_NEXT_DROP;
- error0 = LISP_GPE_ERROR_NO_TUNNEL;
- drops++;
- }
-
- /* TODO error handling if security is implemented */
- b0->error = error0 ? node->errors[error0] : 0;
-
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- lisp_gpe_rx_trace_t *tr = vlib_add_trace (vm, node, b0,
- sizeof (*tr));
- tr->next_index = next0;
- tr->error = error0;
- tr->h = lh0[0];
- }
-
- 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);
- }
-
- /* flush iface stats */
- incr_decap_stats (lgm->vnet_main, thread_index, 0, ~0, &last_sw_if_index,
- &n_packets, &n_bytes);
- vlib_node_increment_counter (vm, lisp_gpe_ip4_input_node.index,
- LISP_GPE_ERROR_NO_TUNNEL, drops);
- return from_frame->n_vectors;
-}
-
-static uword
-lisp_gpe_ip4_input (vlib_main_t * vm, vlib_node_runtime_t * node,
- vlib_frame_t * from_frame)
-{
- return lisp_gpe_input_inline (vm, node, from_frame, 1);
-}
-
-static uword
-lisp_gpe_ip6_input (vlib_main_t * vm, vlib_node_runtime_t * node,
- vlib_frame_t * from_frame)
-{
- return lisp_gpe_input_inline (vm, node, from_frame, 0);
-}
-
-static char *lisp_gpe_ip4_input_error_strings[] = {
-#define lisp_gpe_error(n,s) s,
-#include <vnet/lisp-gpe/lisp_gpe_error.def>
-#undef lisp_gpe_error
-};
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (lisp_gpe_ip4_input_node) = {
- .function = lisp_gpe_ip4_input,
- .name = "lisp-gpe-ip4-input",
- /* Takes a vector of packets. */
- .vector_size = sizeof (u32),
- .n_next_nodes = LISP_GPE_INPUT_N_NEXT,
- .next_nodes = {
-#define _(s,n) [LISP_GPE_INPUT_NEXT_##s] = n,
- foreach_lisp_gpe_ip_input_next
-#undef _
- },
-
- .n_errors = ARRAY_LEN (lisp_gpe_ip4_input_error_strings),
- .error_strings = lisp_gpe_ip4_input_error_strings,
-
- .format_buffer = format_lisp_gpe_header_with_length,
- .format_trace = format_lisp_gpe_rx_trace,
- // $$$$ .unformat_buffer = unformat_lisp_gpe_header,
-};
-/* *INDENT-ON* */
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (lisp_gpe_ip6_input_node) = {
- .function = lisp_gpe_ip6_input,
- .name = "lisp-gpe-ip6-input",
- /* Takes a vector of packets. */
- .vector_size = sizeof (u32),
- .n_next_nodes = LISP_GPE_INPUT_N_NEXT,
- .next_nodes = {
-#define _(s,n) [LISP_GPE_INPUT_NEXT_##s] = n,
- foreach_lisp_gpe_ip_input_next
-#undef _
- },
-
- .n_errors = ARRAY_LEN (lisp_gpe_ip4_input_error_strings),
- .error_strings = lisp_gpe_ip4_input_error_strings,
-
- .format_buffer = format_lisp_gpe_header_with_length,
- .format_trace = format_lisp_gpe_rx_trace,
- // $$$$ .unformat_buffer = unformat_lisp_gpe_header,
-};
-/* *INDENT-ON* */
-
-/**
- * Adds arc from lisp-gpe-input to nsh-input if nsh-input is available
- */
-static void
-gpe_add_arc_from_input_to_nsh ()
-{
- lisp_gpe_main_t *lgm = vnet_lisp_gpe_get_main ();
- vlib_main_t *vm = lgm->vlib_main;
- vlib_node_t *nsh_input;
-
- /* Arc already exists */
- if (next_proto_to_next_index[LISP_GPE_NEXT_PROTO_NSH]
- != LISP_GPE_INPUT_NEXT_DROP)
- return;
-
- /* Check if nsh-input is available */
- if ((nsh_input = vlib_get_node_by_name (vm, (u8 *) "nsh-input")))
- {
- u32 slot4, slot6;
- slot4 = vlib_node_add_next_with_slot (vm, lisp_gpe_ip4_input_node.index,
- nsh_input->index,
- LISP_GPE_NEXT_PROTO_NSH);
- slot6 = vlib_node_add_next_with_slot (vm, lisp_gpe_ip6_input_node.index,
- nsh_input->index,
- LISP_GPE_NEXT_PROTO_NSH);
- ASSERT (slot4 == slot6 && slot4 == LISP_GPE_INPUT_NEXT_NSH_INPUT);
-
- next_proto_to_next_index[LISP_GPE_NEXT_PROTO_NSH] = slot4;
- }
-}
-
-/** GPE decap init function. */
-clib_error_t *
-gpe_decap_init (vlib_main_t * vm)
-{
- clib_error_t *error = 0;
-
- if ((error = vlib_call_init_function (vm, lisp_gpe_init)))
- return error;
-
- gpe_add_arc_from_input_to_nsh ();
- return 0;
-}
-
-static uword
-lisp_gpe_nsh_placeholder_input (vlib_main_t * vm, vlib_node_runtime_t * node,
- vlib_frame_t * from_frame)
-{
- vlib_node_increment_counter (vm, node->node_index, 0, 1);
- return from_frame->n_vectors;
-}
-
-static char *lisp_gpe_nsh_placeholder_error_strings[] = {
- "lisp gpe placeholder nsh decap",
-};
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (lisp_gpe_nsh_placeholder_input_node) = {
- .function = lisp_gpe_nsh_placeholder_input,
- .name = "lisp-gpe-nsh-placeholder-input",
- .vector_size = sizeof (u32),
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_next_nodes = 1,
-
- .n_errors = 1,
- .error_strings = lisp_gpe_nsh_placeholder_error_strings,
-
- .next_nodes = {
- [0] = "error-drop",
- },
-};
-/* *INDENT-ON* */
-
-static clib_error_t *
-lisp_add_placeholder_nsh_node_command_fn (vlib_main_t * vm,
- unformat_input_t * input,
- vlib_cli_command_t * cmd)
-{
- lisp_gpe_main_t *lgm = vnet_lisp_gpe_get_main ();
- vlib_node_add_next (lgm->vlib_main, lisp_gpe_ip4_input_node.index,
- lisp_gpe_nsh_placeholder_input_node.index);
- next_proto_to_next_index[LISP_GPE_NEXT_PROTO_NSH] =
- LISP_GPE_INPUT_NEXT_NSH_INPUT;
- return 0;
-}
-
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (lisp_add_placeholder_nsh_node_command, static) = {
- .path = "test one nsh add-placeholder-decap-node",
- .function = lisp_add_placeholder_nsh_node_command_fn,
-};
-/* *INDENT-ON* */
-
-VLIB_INIT_FUNCTION (gpe_decap_init);
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff