+++ /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-GRE over IPSec packet processing.
- *
- * Add GRE header to thr packet and send it to the esp-encrypt node.
-*/
-
-#include <vnet/vnet.h>
-#include <vnet/ipsec-gre/ipsec_gre.h>
-
-ipsec_gre_main_t ipsec_gre_main;
-
-/**
- * @brief IPv4 and GRE header union.
- *
-*/
-typedef struct
-{
- union
- {
- ip4_and_gre_header_t ip4_and_gre;
- u64 as_u64[3];
- };
-} ip4_and_gre_union_t;
-
-/**
- * @brief Packet trace.
- *
-*/
-typedef struct
-{
- u32 tunnel_id; /**< Tunnel-id / index in tunnel vector */
-
- u32 length; /**< pkt length */
-
- ip4_address_t src; /**< tunnel src IPv4 address */
- ip4_address_t dst; /**< tunnel dst IPv4 address */
-
- u32 sa_id; /**< tunnel IPSec SA id */
-} ipsec_gre_tx_trace_t;
-
-u8 *
-format_ipsec_gre_tx_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 *);
- ipsec_gre_tx_trace_t *t = va_arg (*args, ipsec_gre_tx_trace_t *);
-
- s = format (s, "GRE: tunnel %d len %d src %U dst %U sa-id %d",
- t->tunnel_id, clib_net_to_host_u16 (t->length),
- format_ip4_address, &t->src.as_u8,
- format_ip4_address, &t->dst.as_u8, t->sa_id);
- return s;
-}
-
-/**
- * @brief IPSec-GRE tunnel interface tx function.
- *
- * Add GRE header to the packet.
- *
- * @param vm vlib_main_t corresponding to the current thread.
- * @param node vlib_node_runtime_t data for this node.
- * @param frame vlib_frame_t whose contents should be dispatched.
- *
- * @par Graph mechanics: buffer metadata, next index usage
- *
- * <em>Uses:</em>
- * - <code>node->runtime_data</code>
- * - Match tunnel by <code>rd->dev_instance</code> in IPSec-GRE tunnels
- * pool.
- *
- * <em>Sets:</em>
- * - <code>vnet_buffer(b)->output_features.ipsec_sad_index</code>
- * - Set IPSec Security Association for packet encryption.
- * - <code>vnet_buffer(b)->sw_if_index[VLIB_TX]</code>
- * - Reset output sw_if_index.
- *
- * <em>Nexd Index:</em>
- * - Dispatches the packet to the esp-encrypt node.
-*/
-static uword
-ipsec_gre_interface_tx (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
- ipsec_gre_main_t *igm = &ipsec_gre_main;
- u32 next_index;
- u32 *from, *to_next, n_left_from, n_left_to_next;
- vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
- ipsec_gre_tunnel_t *t = pool_elt_at_index (igm->tunnels, rd->dev_instance);
-
- /* Vector of buffer / pkt indices we're supposed to process */
- from = vlib_frame_vector_args (frame);
-
- /* Number of buffers / pkts */
- n_left_from = frame->n_vectors;
-
- /* Speculatively send the first buffer to the last disposition we used */
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- /* set up to enqueue to our disposition with index = next_index */
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- /*
- * As long as we have enough pkts left to process two pkts
- * and prefetch two pkts...
- */
- while (n_left_from >= 4 && n_left_to_next >= 2)
- {
- vlib_buffer_t *b0, *b1;
- ip4_header_t *ip0, *ip1;
- ip4_and_gre_union_t *h0, *h1;
- u32 bi0, next0, bi1, next1;
- __attribute__ ((unused)) u8 error0, error1;
- u16 gre_protocol0, gre_protocol1;
-
- /* Prefetch the 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);
-
- /*
- * Prefetch packet data. We expect to overwrite
- * the inbound L2 header with an ip header and a
- * gre header. Might want to prefetch the last line
- * of rewrite space as well; need profile data
- */
- CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
- CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
- }
-
- /* Pick up the next two buffer indices */
- bi0 = from[0];
- bi1 = from[1];
-
- /* Speculatively enqueue them where we sent the last buffer */
- 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);
-
- ip0 = vlib_buffer_get_current (b0);
- gre_protocol0 = clib_net_to_host_u16 (0x01);
-
- ip1 = vlib_buffer_get_current (b1);
- gre_protocol1 = clib_net_to_host_u16 (0x01);
-
- vlib_buffer_advance (b0, -sizeof (*h0));
- vlib_buffer_advance (b1, -sizeof (*h1));
-
- h0 = vlib_buffer_get_current (b0);
- h1 = vlib_buffer_get_current (b1);
- h0->as_u64[0] = 0;
- h0->as_u64[1] = 0;
- h0->as_u64[2] = 0;
-
- h1->as_u64[0] = 0;
- h1->as_u64[1] = 0;
- h1->as_u64[2] = 0;
-
- ip0 = &h0->ip4_and_gre.ip4;
- h0->ip4_and_gre.gre.protocol = gre_protocol0;
- ip0->ip_version_and_header_length = 0x45;
- ip0->ttl = 254;
- ip0->protocol = IP_PROTOCOL_GRE;
-
- ip1 = &h1->ip4_and_gre.ip4;
- h1->ip4_and_gre.gre.protocol = gre_protocol1;
- ip1->ip_version_and_header_length = 0x45;
- ip1->ttl = 254;
- ip1->protocol = IP_PROTOCOL_GRE;
-
- ip0->length =
- clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
- ip1->length =
- clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b1));
- ip0->src_address.as_u32 = t->tunnel_src.as_u32;
- ip1->src_address.as_u32 = t->tunnel_src.as_u32;
- ip0->dst_address.as_u32 = t->tunnel_dst.as_u32;
- ip1->dst_address.as_u32 = t->tunnel_dst.as_u32;
- ip0->checksum = ip4_header_checksum (ip0);
- ip1->checksum = ip4_header_checksum (ip1);
-
- vnet_buffer (b0)->sw_if_index[VLIB_RX] =
- vnet_buffer (b0)->sw_if_index[VLIB_TX];
- vnet_buffer (b1)->sw_if_index[VLIB_RX] =
- vnet_buffer (b1)->sw_if_index[VLIB_TX];
-
- vnet_buffer (b0)->ipsec.sad_index = t->local_sa;
- vnet_buffer (b1)->ipsec.sad_index = t->local_sa;
-
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
-
- next0 = IPSEC_GRE_OUTPUT_NEXT_ESP_ENCRYPT;
- next1 = IPSEC_GRE_OUTPUT_NEXT_ESP_ENCRYPT;
- error0 = IPSEC_GRE_ERROR_NONE;
- error1 = IPSEC_GRE_ERROR_NONE;
-
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- ipsec_gre_tx_trace_t *tr = vlib_add_trace (vm, node,
- b0, sizeof (*tr));
- tr->tunnel_id = t - igm->tunnels;
- tr->length = ip0->length;
- tr->src.as_u32 = ip0->src_address.as_u32;
- tr->dst.as_u32 = ip0->dst_address.as_u32;
- tr->sa_id = t->local_sa_id;
- }
-
- if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
- {
- ipsec_gre_tx_trace_t *tr = vlib_add_trace (vm, node,
- b1, sizeof (*tr));
- tr->tunnel_id = t - igm->tunnels;
- tr->length = ip1->length;
- tr->src.as_u32 = ip1->src_address.as_u32;
- tr->dst.as_u32 = ip1->dst_address.as_u32;
- tr->sa_id = t->local_sa_id;
- }
-
- 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)
- {
- vlib_buffer_t *b0;
- ip4_header_t *ip0;
- ip4_and_gre_union_t *h0;
- u32 bi0, next0;
- __attribute__ ((unused)) u8 error0;
- u16 gre_protocol0;
-
- bi0 = to_next[0] = from[0];
- from += 1;
- n_left_from -= 1;
- to_next += 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
-
- gre_protocol0 = clib_net_to_host_u16 (0x01);
-
- vlib_buffer_advance (b0, -sizeof (*h0));
-
- h0 = vlib_buffer_get_current (b0);
- h0->as_u64[0] = 0;
- h0->as_u64[1] = 0;
- h0->as_u64[2] = 0;
-
- ip0 = &h0->ip4_and_gre.ip4;
- h0->ip4_and_gre.gre.protocol = gre_protocol0;
- ip0->ip_version_and_header_length = 0x45;
- ip0->ttl = 254;
- ip0->protocol = IP_PROTOCOL_GRE;
- ip0->length =
- clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
- ip0->src_address.as_u32 = t->tunnel_src.as_u32;
- ip0->dst_address.as_u32 = t->tunnel_dst.as_u32;
- ip0->checksum = ip4_header_checksum (ip0);
-
- vnet_buffer (b0)->sw_if_index[VLIB_RX] =
- vnet_buffer (b0)->sw_if_index[VLIB_TX];
- vnet_buffer (b0)->ipsec.sad_index = t->local_sa;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
-
- next0 = IPSEC_GRE_OUTPUT_NEXT_ESP_ENCRYPT;
- error0 = IPSEC_GRE_ERROR_NONE;
-
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- ipsec_gre_tx_trace_t *tr = vlib_add_trace (vm, node,
- b0, sizeof (*tr));
- tr->tunnel_id = t - igm->tunnels;
- tr->length = ip0->length;
- tr->src.as_u32 = ip0->src_address.as_u32;
- tr->dst.as_u32 = ip0->dst_address.as_u32;
- tr->sa_id = t->local_sa_id;
- }
-
- 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);
- }
-
- vlib_node_increment_counter (vm, ipsec_gre_input_node.index,
- IPSEC_GRE_ERROR_PKTS_ENCAP, frame->n_vectors);
-
- return frame->n_vectors;
-}
-
-static clib_error_t *
-ipsec_gre_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index,
- u32 flags)
-{
- if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
- vnet_hw_interface_set_flags (vnm, hw_if_index,
- VNET_HW_INTERFACE_FLAG_LINK_UP);
- else
- vnet_hw_interface_set_flags (vnm, hw_if_index, 0 /* down */ );
-
- return /* no error */ 0;
-}
-
-static u8 *
-format_ipsec_gre_tunnel_name (u8 * s, va_list * args)
-{
- u32 dev_instance = va_arg (*args, u32);
- return format (s, "ipsec-gre%d", dev_instance);
-}
-
-static u8 *
-format_ipsec_gre_device (u8 * s, va_list * args)
-{
- u32 dev_instance = va_arg (*args, u32);
- CLIB_UNUSED (int verbose) = va_arg (*args, int);
-
- s = format (s, "IPSEC-GRE tunnel: id %d\n", dev_instance);
- return s;
-}
-
-/* *INDENT-OFF* */
-VNET_DEVICE_CLASS (ipsec_gre_device_class) = {
- .name = "IPSec GRE tunnel device",
- .format_device_name = format_ipsec_gre_tunnel_name,
- .format_device = format_ipsec_gre_device,
- .format_tx_trace = format_ipsec_gre_tx_trace,
- .tx_function = ipsec_gre_interface_tx,
- .admin_up_down_function = ipsec_gre_interface_admin_up_down,
-};
-
-VLIB_DEVICE_TX_FUNCTION_MULTIARCH (ipsec_gre_device_class,
- ipsec_gre_interface_tx)
-
-
-VNET_HW_INTERFACE_CLASS (ipsec_gre_hw_interface_class) = {
- .name = "IPSEC-GRE",
-};
-/* *INDENT-ON* */
-
-static clib_error_t *
-ipsec_gre_init (vlib_main_t * vm)
-{
- ipsec_gre_main_t *igm = &ipsec_gre_main;
- clib_error_t *error;
-
- memset (igm, 0, sizeof (igm[0]));
- igm->vlib_main = vm;
- igm->vnet_main = vnet_get_main ();
-
- if ((error = vlib_call_init_function (vm, ip_main_init)))
- return error;
-
- if ((error = vlib_call_init_function (vm, ip4_lookup_init)))
- return error;
-
- igm->tunnel_by_key = hash_create (0, sizeof (uword));
-
- return vlib_call_init_function (vm, ipsec_gre_input_init);
-}
-
-VLIB_INIT_FUNCTION (ipsec_gre_init);
-
-ipsec_gre_main_t *
-ipsec_gre_get_main (vlib_main_t * vm)
-{
- vlib_call_init_function (vm, ipsec_gre_init);
- return &ipsec_gre_main;
-}
-
-/*
-* fd.io coding-style-patch-verification: ON
-*
-* Local Variables:
-* eval: (c-set-style "gnu")
-* End:
-*/
Code Review / vpp.git / blobdiff