+++ /dev/null
-/*
- * node.c: gre packet processing
- *
- * Copyright (c) 2012 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.
- */
-
-#include <vlib/vlib.h>
-#include <vnet/pg/pg.h>
-#include <vnet/gre/gre.h>
-#include <vnet/mpls/mpls.h>
-#include <vppinfra/sparse_vec.h>
-
-#define foreach_gre_input_next \
-_(PUNT, "error-punt") \
-_(DROP, "error-drop") \
-_(ETHERNET_INPUT, "ethernet-input") \
-_(IP4_INPUT, "ip4-input") \
-_(IP6_INPUT, "ip6-input") \
-_(MPLS_INPUT, "mpls-input")
-
-typedef enum
-{
-#define _(s,n) GRE_INPUT_NEXT_##s,
- foreach_gre_input_next
-#undef _
- GRE_INPUT_N_NEXT,
-} gre_input_next_t;
-
-typedef struct
-{
- u32 tunnel_id;
- u32 length;
- ip46_address_t src;
- ip46_address_t dst;
-} gre_rx_trace_t;
-
-extern u8 *format_gre_rx_trace (u8 * s, va_list * args);
-
-#ifndef CLIB_MARCH_VARIANT
-u8 *
-format_gre_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 *);
- gre_rx_trace_t *t = va_arg (*args, gre_rx_trace_t *);
-
- s = format (s, "GRE: tunnel %d len %d src %U dst %U",
- t->tunnel_id, clib_net_to_host_u16 (t->length),
- format_ip46_address, &t->src, IP46_TYPE_ANY,
- format_ip46_address, &t->dst, IP46_TYPE_ANY);
- return s;
-}
-#endif /* CLIB_MARCH_VARIANT */
-
-typedef struct
-{
- /* Sparse vector mapping gre protocol in network byte order
- to next index. */
- u16 *next_by_protocol;
-} gre_input_runtime_t;
-
-always_inline void
-gre_trace (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_buffer_t * b,
- u32 tun_sw_if_index, const ip6_header_t * ip6,
- const ip4_header_t * ip4, int is_ipv6)
-{
- gre_rx_trace_t *tr = vlib_add_trace (vm, node,
- b, sizeof (*tr));
- tr->tunnel_id = tun_sw_if_index;
- if (is_ipv6)
- {
- tr->length = ip6->payload_length;
- tr->src.ip6.as_u64[0] = ip6->src_address.as_u64[0];
- tr->src.ip6.as_u64[1] = ip6->src_address.as_u64[1];
- tr->dst.ip6.as_u64[0] = ip6->dst_address.as_u64[0];
- tr->dst.ip6.as_u64[1] = ip6->dst_address.as_u64[1];
- }
- else
- {
- tr->length = ip4->length;
- tr->src.as_u64[0] = tr->src.as_u64[1] = 0;
- tr->dst.as_u64[0] = tr->dst.as_u64[1] = 0;
- tr->src.ip4.as_u32 = ip4->src_address.as_u32;
- tr->dst.ip4.as_u32 = ip4->dst_address.as_u32;
- }
-}
-
-always_inline void
-gre_tunnel_get (const gre_main_t * gm, vlib_node_runtime_t * node,
- vlib_buffer_t * b, u16 * next, const gre_tunnel_key_t * key,
- gre_tunnel_key_t * cached_key, u32 * tun_sw_if_index,
- u32 * cached_tun_sw_if_index, int is_ipv6)
-{
- const uword *p;
- p = is_ipv6 ? hash_get_mem (gm->tunnel_by_key6, &key->gtk_v6)
- : hash_get_mem (gm->tunnel_by_key4, &key->gtk_v4);
- if (PREDICT_FALSE (!p))
- {
- *next = GRE_INPUT_NEXT_DROP;
- b->error = node->errors[GRE_ERROR_NO_SUCH_TUNNEL];
- *tun_sw_if_index = ~0;
- }
- else
- {
- const gre_tunnel_t *tun;
- tun = pool_elt_at_index (gm->tunnels, *p);
- *cached_tun_sw_if_index = *tun_sw_if_index = tun->sw_if_index;
- if (is_ipv6)
- cached_key->gtk_v6 = key->gtk_v6;
- else
- cached_key->gtk_v4 = key->gtk_v4;
- }
-}
-
-always_inline uword
-gre_input (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * frame,
- const int is_ipv6)
-{
- gre_main_t *gm = &gre_main;
- u32 *from, n_left_from;
- vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
- u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
- u16 cached_protocol = ~0;
- u32 cached_next_index = SPARSE_VEC_INVALID_INDEX;
- u32 cached_tun_sw_if_index = ~0;
- gre_tunnel_key_t cached_key;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- vlib_get_buffers (vm, from, bufs, n_left_from);
-
- if (is_ipv6)
- clib_memset (&cached_key.gtk_v6, 0xff, sizeof (cached_key.gtk_v6));
- else
- clib_memset (&cached_key.gtk_v4, 0xff, sizeof (cached_key.gtk_v4));
-
- while (n_left_from >= 2)
- {
- const ip6_header_t *ip6[2];
- const ip4_header_t *ip4[2];
- const gre_header_t *gre[2];
- u32 nidx[2];
- next_info_t ni[2];
- u8 type[2];
- u16 version[2];
- u32 len[2];
- gre_tunnel_key_t key[2];
- u8 matched[2];
- u32 tun_sw_if_index[2];
-
- if (PREDICT_TRUE (n_left_from >= 6))
- {
- vlib_prefetch_buffer_data (b[2], LOAD);
- vlib_prefetch_buffer_data (b[3], LOAD);
- vlib_prefetch_buffer_header (b[4], STORE);
- vlib_prefetch_buffer_header (b[5], STORE);
- }
-
- if (is_ipv6)
- {
- /* ip6_local hands us the ip header, not the gre header */
- ip6[0] = vlib_buffer_get_current (b[0]);
- ip6[1] = vlib_buffer_get_current (b[1]);
- gre[0] = (void *) (ip6[0] + 1);
- gre[1] = (void *) (ip6[1] + 1);
- vlib_buffer_advance (b[0], sizeof (*ip6[0]) + sizeof (*gre[0]));
- vlib_buffer_advance (b[1], sizeof (*ip6[0]) + sizeof (*gre[0]));
- }
- else
- {
- /* ip4_local hands us the ip header, not the gre header */
- ip4[0] = vlib_buffer_get_current (b[0]);
- ip4[1] = vlib_buffer_get_current (b[1]);
- gre[0] = (void *) (ip4[0] + 1);
- gre[1] = (void *) (ip4[1] + 1);
- vlib_buffer_advance (b[0], sizeof (*ip4[0]) + sizeof (*gre[0]));
- vlib_buffer_advance (b[1], sizeof (*ip4[0]) + sizeof (*gre[0]));
- }
-
- if (PREDICT_TRUE (cached_protocol == gre[0]->protocol))
- {
- nidx[0] = cached_next_index;
- }
- else
- {
- cached_next_index = nidx[0] =
- sparse_vec_index (gm->next_by_protocol, gre[0]->protocol);
- cached_protocol = gre[0]->protocol;
- }
- if (PREDICT_TRUE (cached_protocol == gre[1]->protocol))
- {
- nidx[1] = cached_next_index;
- }
- else
- {
- cached_next_index = nidx[1] =
- sparse_vec_index (gm->next_by_protocol, gre[1]->protocol);
- cached_protocol = gre[1]->protocol;
- }
-
- ni[0] = vec_elt (gm->next_by_protocol, nidx[0]);
- ni[1] = vec_elt (gm->next_by_protocol, nidx[1]);
- next[0] = ni[0].next_index;
- next[1] = ni[1].next_index;
- type[0] = ni[0].tunnel_type;
- type[1] = ni[1].tunnel_type;
-
- b[0]->error = nidx[0] == SPARSE_VEC_INVALID_INDEX
- ? node->errors[GRE_ERROR_UNKNOWN_PROTOCOL]
- : node->errors[GRE_ERROR_NONE];
- b[1]->error = nidx[1] == SPARSE_VEC_INVALID_INDEX
- ? node->errors[GRE_ERROR_UNKNOWN_PROTOCOL]
- : node->errors[GRE_ERROR_NONE];
-
- version[0] = clib_net_to_host_u16 (gre[0]->flags_and_version);
- version[1] = clib_net_to_host_u16 (gre[1]->flags_and_version);
- version[0] &= GRE_VERSION_MASK;
- version[1] &= GRE_VERSION_MASK;
-
- b[0]->error = version[0]
- ? node->errors[GRE_ERROR_UNSUPPORTED_VERSION] : b[0]->error;
- next[0] = version[0] ? GRE_INPUT_NEXT_DROP : next[0];
- b[1]->error = version[1]
- ? node->errors[GRE_ERROR_UNSUPPORTED_VERSION] : b[1]->error;
- next[1] = version[1] ? GRE_INPUT_NEXT_DROP : next[1];
-
- len[0] = vlib_buffer_length_in_chain (vm, b[0]);
- len[1] = vlib_buffer_length_in_chain (vm, b[1]);
-
- /* always search for P2P types in the DP */
- if (is_ipv6)
- {
- gre_mk_key6 (&ip6[0]->dst_address,
- &ip6[0]->src_address,
- vnet_buffer (b[0])->ip.fib_index,
- type[0], TUNNEL_MODE_P2P, 0, &key[0].gtk_v6);
- gre_mk_key6 (&ip6[1]->dst_address,
- &ip6[1]->src_address,
- vnet_buffer (b[1])->ip.fib_index,
- type[1], TUNNEL_MODE_P2P, 0, &key[1].gtk_v6);
- matched[0] = gre_match_key6 (&cached_key.gtk_v6, &key[0].gtk_v6);
- matched[1] = gre_match_key6 (&cached_key.gtk_v6, &key[1].gtk_v6);
- }
- else
- {
- gre_mk_key4 (ip4[0]->dst_address,
- ip4[0]->src_address,
- vnet_buffer (b[0])->ip.fib_index,
- type[0], TUNNEL_MODE_P2P, 0, &key[0].gtk_v4);
- gre_mk_key4 (ip4[1]->dst_address,
- ip4[1]->src_address,
- vnet_buffer (b[1])->ip.fib_index,
- type[1], TUNNEL_MODE_P2P, 0, &key[1].gtk_v4);
- matched[0] = gre_match_key4 (&cached_key.gtk_v4, &key[0].gtk_v4);
- matched[1] = gre_match_key4 (&cached_key.gtk_v4, &key[1].gtk_v4);
- }
-
- tun_sw_if_index[0] = cached_tun_sw_if_index;
- tun_sw_if_index[1] = cached_tun_sw_if_index;
- if (PREDICT_FALSE (!matched[0]))
- gre_tunnel_get (gm, node, b[0], &next[0], &key[0], &cached_key,
- &tun_sw_if_index[0], &cached_tun_sw_if_index,
- is_ipv6);
- if (PREDICT_FALSE (!matched[1]))
- gre_tunnel_get (gm, node, b[1], &next[1], &key[1], &cached_key,
- &tun_sw_if_index[1], &cached_tun_sw_if_index,
- is_ipv6);
-
- if (PREDICT_TRUE (next[0] > GRE_INPUT_NEXT_DROP))
- {
- vlib_increment_combined_counter (&gm->vnet_main->
- interface_main.combined_sw_if_counters
- [VNET_INTERFACE_COUNTER_RX],
- vm->thread_index,
- tun_sw_if_index[0],
- 1 /* packets */ ,
- len[0] /* bytes */ );
- vnet_buffer (b[0])->sw_if_index[VLIB_RX] = tun_sw_if_index[0];
- }
- if (PREDICT_TRUE (next[1] > GRE_INPUT_NEXT_DROP))
- {
- vlib_increment_combined_counter (&gm->vnet_main->
- interface_main.combined_sw_if_counters
- [VNET_INTERFACE_COUNTER_RX],
- vm->thread_index,
- tun_sw_if_index[1],
- 1 /* packets */ ,
- len[1] /* bytes */ );
- vnet_buffer (b[1])->sw_if_index[VLIB_RX] = tun_sw_if_index[1];
- }
-
- vnet_buffer (b[0])->sw_if_index[VLIB_TX] = (u32) ~0;
- vnet_buffer (b[1])->sw_if_index[VLIB_TX] = (u32) ~0;
-
- if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
- gre_trace (vm, node, b[0], tun_sw_if_index[0], ip6[0], ip4[0],
- is_ipv6);
- if (PREDICT_FALSE (b[1]->flags & VLIB_BUFFER_IS_TRACED))
- gre_trace (vm, node, b[1], tun_sw_if_index[1], ip6[1], ip4[1],
- is_ipv6);
-
- b += 2;
- next += 2;
- n_left_from -= 2;
- }
-
- while (n_left_from >= 1)
- {
- const ip6_header_t *ip6[1];
- const ip4_header_t *ip4[1];
- const gre_header_t *gre[1];
- u32 nidx[1];
- next_info_t ni[1];
- u8 type[1];
- u16 version[1];
- u32 len[1];
- gre_tunnel_key_t key[1];
- u8 matched[1];
- u32 tun_sw_if_index[1];
-
- if (PREDICT_TRUE (n_left_from >= 3))
- {
- vlib_prefetch_buffer_data (b[1], LOAD);
- vlib_prefetch_buffer_header (b[2], STORE);
- }
-
- if (is_ipv6)
- {
- /* ip6_local hands us the ip header, not the gre header */
- ip6[0] = vlib_buffer_get_current (b[0]);
- gre[0] = (void *) (ip6[0] + 1);
- vlib_buffer_advance (b[0], sizeof (*ip6[0]) + sizeof (*gre[0]));
- }
- else
- {
- /* ip4_local hands us the ip header, not the gre header */
- ip4[0] = vlib_buffer_get_current (b[0]);
- gre[0] = (void *) (ip4[0] + 1);
- vlib_buffer_advance (b[0], sizeof (*ip4[0]) + sizeof (*gre[0]));
- }
-
- if (PREDICT_TRUE (cached_protocol == gre[0]->protocol))
- {
- nidx[0] = cached_next_index;
- }
- else
- {
- cached_next_index = nidx[0] =
- sparse_vec_index (gm->next_by_protocol, gre[0]->protocol);
- cached_protocol = gre[0]->protocol;
- }
-
- ni[0] = vec_elt (gm->next_by_protocol, nidx[0]);
- next[0] = ni[0].next_index;
- type[0] = ni[0].tunnel_type;
-
- b[0]->error = nidx[0] == SPARSE_VEC_INVALID_INDEX
- ? node->errors[GRE_ERROR_UNKNOWN_PROTOCOL]
- : node->errors[GRE_ERROR_NONE];
-
- version[0] = clib_net_to_host_u16 (gre[0]->flags_and_version);
- version[0] &= GRE_VERSION_MASK;
-
- b[0]->error = version[0]
- ? node->errors[GRE_ERROR_UNSUPPORTED_VERSION] : b[0]->error;
- next[0] = version[0] ? GRE_INPUT_NEXT_DROP : next[0];
-
- len[0] = vlib_buffer_length_in_chain (vm, b[0]);
-
- if (is_ipv6)
- {
- gre_mk_key6 (&ip6[0]->dst_address,
- &ip6[0]->src_address,
- vnet_buffer (b[0])->ip.fib_index,
- type[0], TUNNEL_MODE_P2P, 0, &key[0].gtk_v6);
- matched[0] = gre_match_key6 (&cached_key.gtk_v6, &key[0].gtk_v6);
- }
- else
- {
- gre_mk_key4 (ip4[0]->dst_address,
- ip4[0]->src_address,
- vnet_buffer (b[0])->ip.fib_index,
- type[0], TUNNEL_MODE_P2P, 0, &key[0].gtk_v4);
- matched[0] = gre_match_key4 (&cached_key.gtk_v4, &key[0].gtk_v4);
- }
-
- tun_sw_if_index[0] = cached_tun_sw_if_index;
- if (PREDICT_FALSE (!matched[0]))
- gre_tunnel_get (gm, node, b[0], &next[0], &key[0], &cached_key,
- &tun_sw_if_index[0], &cached_tun_sw_if_index,
- is_ipv6);
-
- if (PREDICT_TRUE (next[0] > GRE_INPUT_NEXT_DROP))
- {
- vlib_increment_combined_counter (&gm->vnet_main->
- interface_main.combined_sw_if_counters
- [VNET_INTERFACE_COUNTER_RX],
- vm->thread_index,
- tun_sw_if_index[0],
- 1 /* packets */ ,
- len[0] /* bytes */ );
- vnet_buffer (b[0])->sw_if_index[VLIB_RX] = tun_sw_if_index[0];
- }
-
- vnet_buffer (b[0])->sw_if_index[VLIB_TX] = (u32) ~0;
-
- if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
- gre_trace (vm, node, b[0], tun_sw_if_index[0], ip6[0], ip4[0],
- is_ipv6);
-
- b += 1;
- next += 1;
- n_left_from -= 1;
- }
-
- vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
-
- vlib_node_increment_counter (vm,
- is_ipv6 ? gre6_input_node.index :
- gre4_input_node.index, GRE_ERROR_PKTS_DECAP,
- n_left_from);
-
- return frame->n_vectors;
-}
-
-VLIB_NODE_FN (gre4_input_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * from_frame)
-{
- return gre_input (vm, node, from_frame, /* is_ip6 */ 0);
-}
-
-VLIB_NODE_FN (gre6_input_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * from_frame)
-{
- return gre_input (vm, node, from_frame, /* is_ip6 */ 1);
-}
-
-static char *gre_error_strings[] = {
-#define gre_error(n,s) s,
-#include "error.def"
-#undef gre_error
-};
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (gre4_input_node) = {
- .name = "gre4-input",
- /* Takes a vector of packets. */
- .vector_size = sizeof (u32),
-
- .n_errors = GRE_N_ERROR,
- .error_strings = gre_error_strings,
-
- .n_next_nodes = GRE_INPUT_N_NEXT,
- .next_nodes = {
-#define _(s,n) [GRE_INPUT_NEXT_##s] = n,
- foreach_gre_input_next
-#undef _
- },
-
- .format_buffer = format_gre_header_with_length,
- .format_trace = format_gre_rx_trace,
- .unformat_buffer = unformat_gre_header,
-};
-
-VLIB_REGISTER_NODE (gre6_input_node) = {
- .name = "gre6-input",
- /* Takes a vector of packets. */
- .vector_size = sizeof (u32),
-
- .runtime_data_bytes = sizeof (gre_input_runtime_t),
-
- .n_errors = GRE_N_ERROR,
- .error_strings = gre_error_strings,
-
- .n_next_nodes = GRE_INPUT_N_NEXT,
- .next_nodes = {
-#define _(s,n) [GRE_INPUT_NEXT_##s] = n,
- foreach_gre_input_next
-#undef _
- },
-
- .format_buffer = format_gre_header_with_length,
- .format_trace = format_gre_rx_trace,
- .unformat_buffer = unformat_gre_header,
-};
-/* *INDENT-ON* */
-
-#ifndef CLIB_MARCH_VARIANT
-void
-gre_register_input_protocol (vlib_main_t * vm,
- gre_protocol_t protocol, u32 node_index,
- gre_tunnel_type_t tunnel_type)
-{
- gre_main_t *em = &gre_main;
- gre_protocol_info_t *pi;
- next_info_t *n;
- u32 i;
-
- {
- clib_error_t *error = vlib_call_init_function (vm, gre_input_init);
- if (error)
- clib_error_report (error);
- }
-
- pi = gre_get_protocol_info (em, protocol);
- pi->node_index = node_index;
- pi->tunnel_type = tunnel_type;
- pi->next_index = vlib_node_add_next (vm, gre4_input_node.index, node_index);
- i = vlib_node_add_next (vm, gre6_input_node.index, node_index);
- ASSERT (i == pi->next_index);
-
- /* Setup gre protocol -> next index sparse vector mapping. */
- n = sparse_vec_validate (em->next_by_protocol,
- clib_host_to_net_u16 (protocol));
- n->next_index = pi->next_index;
- n->tunnel_type = tunnel_type;
-}
-
-static void
-gre_setup_node (vlib_main_t * vm, u32 node_index)
-{
- vlib_node_t *n = vlib_get_node (vm, node_index);
- pg_node_t *pn = pg_get_node (node_index);
-
- n->format_buffer = format_gre_header_with_length;
- n->unformat_buffer = unformat_gre_header;
- pn->unformat_edit = unformat_pg_gre_header;
-}
-
-static clib_error_t *
-gre_input_init (vlib_main_t * vm)
-{
- gre_main_t *gm = &gre_main;
- vlib_node_t *ethernet_input, *ip4_input, *ip6_input, *mpls_unicast_input;
-
- {
- clib_error_t *error;
- error = vlib_call_init_function (vm, gre_init);
- if (error)
- clib_error_report (error);
- }
-
- gre_setup_node (vm, gre4_input_node.index);
- gre_setup_node (vm, gre6_input_node.index);
-
- gm->next_by_protocol = sparse_vec_new
- ( /* elt bytes */ sizeof (gm->next_by_protocol[0]),
- /* bits in index */ BITS (((gre_header_t *) 0)->protocol));
-
- /* These could be moved to the supported protocol input node defn's */
- ethernet_input = vlib_get_node_by_name (vm, (u8 *) "ethernet-input");
- ASSERT (ethernet_input);
- ip4_input = vlib_get_node_by_name (vm, (u8 *) "ip4-input");
- ASSERT (ip4_input);
- ip6_input = vlib_get_node_by_name (vm, (u8 *) "ip6-input");
- ASSERT (ip6_input);
- mpls_unicast_input = vlib_get_node_by_name (vm, (u8 *) "mpls-input");
- ASSERT (mpls_unicast_input);
-
- gre_register_input_protocol (vm, GRE_PROTOCOL_teb,
- ethernet_input->index, GRE_TUNNEL_TYPE_TEB);
-
- gre_register_input_protocol (vm, GRE_PROTOCOL_ip4,
- ip4_input->index, GRE_TUNNEL_TYPE_L3);
-
- gre_register_input_protocol (vm, GRE_PROTOCOL_ip6,
- ip6_input->index, GRE_TUNNEL_TYPE_L3);
-
- gre_register_input_protocol (vm, GRE_PROTOCOL_mpls_unicast,
- mpls_unicast_input->index, GRE_TUNNEL_TYPE_L3);
-
- return 0;
-}
-
-VLIB_INIT_FUNCTION (gre_input_init);
-
-#endif /* CLIB_MARCH_VARIANT */
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff