From 7cd468a3d7dee7d6c92f69a0bb7061ae208ec727 Mon Sep 17 00:00:00 2001 From: Damjan Marion Date: Mon, 19 Dec 2016 23:05:39 +0100 Subject: Reorganize source tree to use single autotools instance Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23 Signed-off-by: Damjan Marion --- src/vnet/ipsec-gre/ipsec_gre.c | 407 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 407 insertions(+) create mode 100644 src/vnet/ipsec-gre/ipsec_gre.c (limited to 'src/vnet/ipsec-gre/ipsec_gre.c') diff --git a/src/vnet/ipsec-gre/ipsec_gre.c b/src/vnet/ipsec-gre/ipsec_gre.c new file mode 100644 index 00000000000..a0b065ac283 --- /dev/null +++ b/src/vnet/ipsec-gre/ipsec_gre.c @@ -0,0 +1,407 @@ +/* + * 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 +#include + +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 + * + * Uses: + * - node->runtime_data + * - Match tunnel by rd->dev_instance in IPSec-GRE tunnels + * pool. + * + * Sets: + * - vnet_buffer(b)->output_features.ipsec_sad_index + * - Set IPSec Security Association for packet encryption. + * - vnet_buffer(b)->sw_if_index[VLIB_TX] + * - Reset output sw_if_index. + * + * Nexd Index: + * - 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: +*/ -- cgit 1.2.3-korg