diff options
Diffstat (limited to 'src/vnet/ipsec-gre/node.c')
| -rw-r--r-- | src/vnet/ipsec-gre/node.c | 426 |
1 files changed, 0 insertions, 426 deletions
diff --git a/src/vnet/ipsec-gre/node.c b/src/vnet/ipsec-gre/node.c deleted file mode 100644 index 6a3aaa12e8c..00000000000 --- a/src/vnet/ipsec-gre/node.c +++ /dev/null @@ -1,426 +0,0 @@ -/* - * 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. - * - * Removes GRE header from the packet and sends it to the l2-input node. -*/ - -#include <vlib/vlib.h> -#include <vnet/pg/pg.h> -#include <vnet/ipsec-gre/ipsec_gre.h> -#include <vppinfra/sparse_vec.h> - -#define foreach_ipsec_gre_input_next \ -_(PUNT, "error-punt") \ -_(DROP, "error-drop") \ -_(L2_INPUT, "l2-input") - -typedef enum { -#define _(s,n) IPSEC_GRE_INPUT_NEXT_##s, - foreach_ipsec_gre_input_next -#undef _ - IPSEC_GRE_INPUT_N_NEXT, -} ipsec_gre_input_next_t; - -typedef struct { - u32 tunnel_id; - u32 length; - ip4_address_t src; - ip4_address_t dst; -} ipsec_gre_rx_trace_t; - -static u8 * format_ipsec_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 *); - ipsec_gre_rx_trace_t * t = va_arg (*args, ipsec_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_ip4_address, &t->src.as_u8, - format_ip4_address, &t->dst.as_u8); - return s; -} - -/** - * @brief L2-GRE over IPSec input node. - * @node ipsec-gre-input - * - * This node remove GRE header. - * - * @param vm vlib_main_t corresponding to the current thread. - * @param node vlib_node_runtime_t data for this node. - * @param from_frame vlib_frame_t whose contents should be dispatched. - * - * @par Graph mechanics: buffer metadata, next index usage - * - * <em>Uses:</em> - * - <code>ip->src_address</code> and <code>ip->dst_address</code> - * - Match tunnel by source and destination addresses in GRE IP header. - * - * <em>Sets:</em> - * - <code>vnet_buffer(b)->gre.src</code> - * - Save tunnel source IPv4 address. - * - <code>vnet_buffer(b)->gre.dst</code> - * - Save tunnel destination IPv4 address. - * - <code>vnet_buffer(b)->sw_if_index[VLIB_RX]</code> - * - Set input sw_if_index to IPSec-GRE tunnel for learning. - * - * <em>Next Index:</em> - * - Dispatches the packet to the l2-input node. -*/ -VLIB_NODE_FN (ipsec_gre_input_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame) -{ - ipsec_gre_main_t * igm = &ipsec_gre_main; - u32 n_left_from, next_index, * from, * to_next; - u64 cached_tunnel_key = (u64) ~0; - u32 cached_tunnel_sw_if_index = 0, tunnel_sw_if_index; - u32 tun_src0, tun_dst0; - u32 tun_src1, tun_dst1; - - 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; - gre_header_t * h0, * h1; - u16 version0, version1, protocol0, protocol1; - int verr0, verr1; - u32 next0, next1; - ip4_header_t *ip0, *ip1; - - /* 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, sizeof (h0[0]), LOAD); - CLIB_PREFETCH (p3->data, sizeof (h1[0]), 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); - - /* ip4_local hands us the ip header, not the gre header */ - ip0 = vlib_buffer_get_current (b0); - ip1 = vlib_buffer_get_current (b1); - - /* Save src + dst ip4 address */ - tun_src0 = ip0->src_address.as_u32; - tun_dst0 = ip0->dst_address.as_u32; - tun_src1 = ip1->src_address.as_u32; - tun_dst1 = ip1->dst_address.as_u32; - - vlib_buffer_advance (b0, sizeof (*ip0)); - vlib_buffer_advance (b1, sizeof (*ip1)); - - h0 = vlib_buffer_get_current (b0); - h1 = vlib_buffer_get_current (b1); - - protocol0 = clib_net_to_host_u16 (h0->protocol); - protocol1 = clib_net_to_host_u16 (h1->protocol); - if (PREDICT_TRUE(protocol0 == GRE_PROTOCOL_teb)) - { - next0 = IPSEC_GRE_INPUT_NEXT_L2_INPUT; - b0->error = node->errors[IPSEC_GRE_ERROR_NONE]; - } - else - { - b0->error = node->errors[IPSEC_GRE_ERROR_UNKNOWN_PROTOCOL]; - next0 = IPSEC_GRE_INPUT_NEXT_DROP; - } - if (PREDICT_TRUE(protocol1 == GRE_PROTOCOL_teb)) - { - next1 = IPSEC_GRE_INPUT_NEXT_L2_INPUT; - b1->error = node->errors[IPSEC_GRE_ERROR_NONE]; - } - else - { - b1->error = node->errors[IPSEC_GRE_ERROR_UNKNOWN_PROTOCOL]; - next1 = IPSEC_GRE_INPUT_NEXT_DROP; - } - - version0 = clib_net_to_host_u16 (h0->flags_and_version); - verr0 = version0 & GRE_VERSION_MASK; - version1 = clib_net_to_host_u16 (h1->flags_and_version); - verr1 = version1 & GRE_VERSION_MASK; - - b0->error = verr0 ? node->errors[IPSEC_GRE_ERROR_UNSUPPORTED_VERSION] - : b0->error; - next0 = verr0 ? IPSEC_GRE_INPUT_NEXT_DROP : next0; - b1->error = verr1 ? node->errors[IPSEC_GRE_ERROR_UNSUPPORTED_VERSION] - : b1->error; - next1 = verr1 ? IPSEC_GRE_INPUT_NEXT_DROP : next1; - - /* For L2 payload set input sw_if_index to GRE tunnel for learning */ - if (PREDICT_TRUE(next0 == IPSEC_GRE_INPUT_NEXT_L2_INPUT)) - { - u64 key = ((u64)(tun_dst0) << 32) | (u64)(tun_src0); - - if (cached_tunnel_key != key) - { - vnet_hw_interface_t * hi; - ipsec_gre_tunnel_t * t; - uword * p; - - p = hash_get (igm->tunnel_by_key, key); - if (!p) - { - next0 = IPSEC_GRE_INPUT_NEXT_DROP; - b0->error = node->errors[IPSEC_GRE_ERROR_NO_SUCH_TUNNEL]; - goto drop0; - } - t = pool_elt_at_index (igm->tunnels, p[0]); - hi = vnet_get_hw_interface (igm->vnet_main, - t->hw_if_index); - tunnel_sw_if_index = hi->sw_if_index; - cached_tunnel_sw_if_index = tunnel_sw_if_index; - } - else - { - tunnel_sw_if_index = cached_tunnel_sw_if_index; - } - vnet_buffer(b0)->sw_if_index[VLIB_RX] = tunnel_sw_if_index; - } - -drop0: - /* For L2 payload set input sw_if_index to GRE tunnel for learning */ - if (PREDICT_TRUE(next1 == IPSEC_GRE_INPUT_NEXT_L2_INPUT)) - { - u64 key = ((u64)(tun_dst1) << 32) | (u64)(tun_src1); - - if (cached_tunnel_key != key) - { - vnet_hw_interface_t * hi; - ipsec_gre_tunnel_t * t; - uword * p; - - p = hash_get (igm->tunnel_by_key, key); - if (!p) - { - next1 = IPSEC_GRE_INPUT_NEXT_DROP; - b1->error = node->errors[IPSEC_GRE_ERROR_NO_SUCH_TUNNEL]; - goto drop1; - } - t = pool_elt_at_index (igm->tunnels, p[0]); - hi = vnet_get_hw_interface (igm->vnet_main, - t->hw_if_index); - tunnel_sw_if_index = hi->sw_if_index; - cached_tunnel_sw_if_index = tunnel_sw_if_index; - } - else - { - tunnel_sw_if_index = cached_tunnel_sw_if_index; - } - vnet_buffer(b1)->sw_if_index[VLIB_RX] = tunnel_sw_if_index; - } - -drop1: - if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) - { - ipsec_gre_rx_trace_t *tr = vlib_add_trace (vm, node, - b0, sizeof (*tr)); - tr->tunnel_id = ~0; - tr->length = ip0->length; - tr->src.as_u32 = ip0->src_address.as_u32; - tr->dst.as_u32 = ip0->dst_address.as_u32; - } - - if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED)) - { - ipsec_gre_rx_trace_t *tr = vlib_add_trace (vm, node, - b1, sizeof (*tr)); - tr->tunnel_id = ~0; - tr->length = ip1->length; - tr->src.as_u32 = ip1->src_address.as_u32; - tr->dst.as_u32 = ip1->dst_address.as_u32; - } - - vlib_buffer_advance (b0, sizeof (*h0)); - vlib_buffer_advance (b1, sizeof (*h1)); - - 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; - gre_header_t * h0; - ip4_header_t * ip0; - u16 version0, protocol0; - int verr0; - u32 next0; - u32 tun_src0, tun_dst0; - - 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); - ip0 = vlib_buffer_get_current (b0); - - tun_src0 = ip0->src_address.as_u32; - tun_dst0 = ip0->dst_address.as_u32; - - vlib_buffer_advance (b0, sizeof (*ip0)); - - h0 = vlib_buffer_get_current (b0); - - protocol0 = clib_net_to_host_u16 (h0->protocol); - if (PREDICT_TRUE(protocol0 == GRE_PROTOCOL_teb)) - { - next0 = IPSEC_GRE_INPUT_NEXT_L2_INPUT; - b0->error = node->errors[IPSEC_GRE_ERROR_NONE]; - } - else - { - b0->error = node->errors[IPSEC_GRE_ERROR_UNKNOWN_PROTOCOL]; - next0 = IPSEC_GRE_INPUT_NEXT_DROP; - } - - version0 = clib_net_to_host_u16 (h0->flags_and_version); - verr0 = version0 & GRE_VERSION_MASK; - b0->error = verr0 ? node->errors[IPSEC_GRE_ERROR_UNSUPPORTED_VERSION] - : b0->error; - next0 = verr0 ? IPSEC_GRE_INPUT_NEXT_DROP : next0; - - /* For L2 payload set input sw_if_index to GRE tunnel for learning */ - if (PREDICT_TRUE(next0 == IPSEC_GRE_INPUT_NEXT_L2_INPUT)) - { - u64 key = ((u64)(tun_dst0) << 32) | (u64)(tun_src0); - - if (cached_tunnel_key != key) - { - vnet_hw_interface_t * hi; - ipsec_gre_tunnel_t * t; - uword * p; - - p = hash_get (igm->tunnel_by_key, key); - if (!p) - { - next0 = IPSEC_GRE_INPUT_NEXT_DROP; - b0->error = node->errors[IPSEC_GRE_ERROR_NO_SUCH_TUNNEL]; - goto drop; - } - t = pool_elt_at_index (igm->tunnels, p[0]); - hi = vnet_get_hw_interface (igm->vnet_main, - t->hw_if_index); - tunnel_sw_if_index = hi->sw_if_index; - cached_tunnel_sw_if_index = tunnel_sw_if_index; - } - else - { - tunnel_sw_if_index = cached_tunnel_sw_if_index; - } - vnet_buffer(b0)->sw_if_index[VLIB_RX] = tunnel_sw_if_index; - } - -drop: - if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) - { - ipsec_gre_rx_trace_t *tr = vlib_add_trace (vm, node, - b0, sizeof (*tr)); - tr->tunnel_id = ~0; - tr->length = ip0->length; - tr->src.as_u32 = ip0->src_address.as_u32; - tr->dst.as_u32 = ip0->dst_address.as_u32; - } - - vlib_buffer_advance (b0, sizeof (*h0)); - - 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_DECAP, from_frame->n_vectors); - return from_frame->n_vectors; -} - -static char * ipsec_gre_error_strings[] = { -#define ipsec_gre_error(n,s) s, -#include "error.def" -#undef ipsec_gre_error -}; - -VLIB_REGISTER_NODE (ipsec_gre_input_node) = { - .name = "ipsec-gre-input", - /* Takes a vector of packets. */ - .vector_size = sizeof (u32), - - .n_errors = IPSEC_GRE_N_ERROR, - .error_strings = ipsec_gre_error_strings, - - .n_next_nodes = IPSEC_GRE_INPUT_N_NEXT, - .next_nodes = { -#define _(s,n) [IPSEC_GRE_INPUT_NEXT_##s] = n, - foreach_ipsec_gre_input_next -#undef _ - }, - - .format_trace = format_ipsec_gre_rx_trace, -}; - -static clib_error_t * ipsec_gre_input_init (vlib_main_t * vm) -{ - { - clib_error_t * error; - error = vlib_call_init_function (vm, ipsec_gre_init); - if (error) - clib_error_report (error); - } - - return 0; -} - -VLIB_INIT_FUNCTION (ipsec_gre_input_init); |