diff options
Diffstat (limited to 'src/vnet/ipip/node.c')
| -rw-r--r-- | src/vnet/ipip/node.c | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/src/vnet/ipip/node.c b/src/vnet/ipip/node.c new file mode 100644 index 00000000000..f24ea97b2cd --- /dev/null +++ b/src/vnet/ipip/node.c @@ -0,0 +1,268 @@ +/* + * node.c: ipip packet processing + * + * Copyright (c) 2018 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 aipiped 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/ipip/ipip.h> +#include <vnet/ip/ip6_packet.h> +#include <vnet/mpls/mpls.h> +#include <vnet/pg/pg.h> +#include <vppinfra/sparse_vec.h> + +#define foreach_ipip_input_next \ + _(PUNT, "error-punt") \ + _(DROP, "error-drop") \ + _(IP4_INPUT, "ip4-input") \ + _(IP6_INPUT, "ip6-input") + +typedef enum +{ +#define _(s, n) IPIP_INPUT_NEXT_##s, + foreach_ipip_input_next +#undef _ + IPIP_INPUT_N_NEXT, +} ipip_input_next_t; + +typedef struct +{ + u32 tunnel_id; + u32 length; + ip46_address_t src; + ip46_address_t dst; + u8 is_ipv6; +} ipip_rx_trace_t; + +u8 * +format_ipip_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 *); + ipip_rx_trace_t *t = va_arg (*args, ipip_rx_trace_t *); + + s = format (s, "IPIP: 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; +} + +always_inline uword +ipip_input (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * from_frame, bool is_ipv6) +{ + ipip_main_t *gm = &ipip_main; + u32 n_left_from, next_index, *from, *to_next, n_left_to_next; + u32 tunnel_sw_if_index = ~0; + u32 thread_index = vlib_get_thread_index (); + u32 len; + vnet_interface_main_t *im = &gm->vnet_main->interface_main; + + 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) + { + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t *b0; + ip4_header_t *ip40; + ip6_header_t *ip60; + u32 next0 = IPIP_INPUT_NEXT_DROP; + ip46_address_t src0 = ip46_address_initializer, dst0 = + ip46_address_initializer; + ipip_transport_t transport0; + u8 inner_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); + + if (is_ipv6) + { + ip60 = vlib_buffer_get_current (b0); + vlib_buffer_advance (b0, sizeof (*ip60)); + ip_set (&src0, &ip60->src_address, false); + ip_set (&dst0, &ip60->dst_address, false); + inner_protocol0 = ip60->protocol; + transport0 = IPIP_TRANSPORT_IP6; + } + else + { + ip40 = vlib_buffer_get_current (b0); + vlib_buffer_advance (b0, sizeof (*ip40)); + ip_set (&src0, &ip40->src_address, true); + ip_set (&dst0, &ip40->dst_address, true); + inner_protocol0 = ip40->protocol; + transport0 = IPIP_TRANSPORT_IP4; + } + + /* + * Find tunnel. First a lookup for P2P tunnels, then a lookup + * for multipoint tunnels + */ + ipip_tunnel_key_t key0 = {.transport = transport0, + .fib_index = vnet_buffer (b0)->ip.fib_index, + .src = dst0, + .dst = src0 + }; + ipip_tunnel_t *t0 = ipip_tunnel_db_find (&key0); + if (!t0) + { + ip46_address_reset (&key0.dst); + t0 = ipip_tunnel_db_find (&key0); + if (!t0) + { + next0 = IPIP_INPUT_NEXT_DROP; + b0->error = node->errors[IPIP_ERROR_NO_TUNNEL]; + goto drop; + } + } + tunnel_sw_if_index = t0->sw_if_index; + + len = vlib_buffer_length_in_chain (vm, b0); + vnet_buffer (b0)->sw_if_index[VLIB_RX] = tunnel_sw_if_index; + + if (inner_protocol0 == IP_PROTOCOL_IPV6) + next0 = IPIP_INPUT_NEXT_IP6_INPUT; + else if (inner_protocol0 == IP_PROTOCOL_IP_IN_IP) + next0 = IPIP_INPUT_NEXT_IP4_INPUT; + + if (!is_ipv6 && t0->mode == IPIP_MODE_6RD + && t0->sixrd.security_check) + { + ip6_header_t *inner_ip60 = vlib_buffer_get_current (b0); + if (sixrd_get_addr_net (t0, inner_ip60->src_address.as_u64[0]) + != ip40->src_address.as_u32) + { + next0 = IPIP_INPUT_NEXT_DROP; + b0->error = node->errors[IPIP_ERROR_NO_TUNNEL]; + goto drop; + } + } + + vlib_increment_combined_counter (im->combined_sw_if_counters + + VNET_INTERFACE_COUNTER_RX, + thread_index, tunnel_sw_if_index, + 1 /* packets */ , + len /* bytes */ ); + + drop: + if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) + { + ipip_rx_trace_t *tr = + vlib_add_trace (vm, node, b0, sizeof (*tr)); + tr->tunnel_id = tunnel_sw_if_index; + if (is_ipv6) + { + tr->length = ip60->payload_length; + tr->src.ip6.as_u64[0] = ip60->src_address.as_u64[0]; + tr->src.ip6.as_u64[1] = ip60->src_address.as_u64[1]; + tr->dst.ip6.as_u64[0] = ip60->dst_address.as_u64[0]; + tr->dst.ip6.as_u64[1] = ip60->dst_address.as_u64[1]; + } + else + { + tr->length = ip40->length; + tr->src.ip4.as_u32 = ip40->src_address.as_u32; + tr->dst.ip4.as_u32 = ip40->dst_address.as_u32; + } + } + + 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, + !is_ipv6 ? ipip4_input_node.index : + ipip6_input_node.index, IPIP_ERROR_DECAP_PKTS, + from_frame->n_vectors); + return from_frame->n_vectors; +} + +static uword +ipip4_input (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + return ipip_input (vm, node, from_frame, /* is_ip6 */ false); +} + +static uword +ipip6_input (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + return ipip_input (vm, node, from_frame, /* is_ip6 */ true); +} + +static char *ipip_error_strings[] = { +#define _(sym,string) string, + foreach_ipip_error +#undef _ +}; + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE(ipip4_input_node) = { + .function = ipip4_input, + .name = "ipip4-input", + /* Takes a vector of packets. */ + .vector_size = sizeof(u32), + .n_errors = IPIP_N_ERROR, + .error_strings = ipip_error_strings, + .n_next_nodes = IPIP_INPUT_N_NEXT, + .next_nodes = + { +#define _(s, n) [IPIP_INPUT_NEXT_##s] = n, + foreach_ipip_input_next +#undef _ + }, + .format_trace = format_ipip_rx_trace, +}; + +VLIB_REGISTER_NODE(ipip6_input_node) = { + .function = ipip6_input, + .name = "ipip6-input", + /* Takes a vector of packets. */ + .vector_size = sizeof(u32), + .n_errors = IPIP_N_ERROR, + .error_strings = ipip_error_strings, + .n_next_nodes = IPIP_INPUT_N_NEXT, + .next_nodes = + { +#define _(s, n) [IPIP_INPUT_NEXT_##s] = n, + foreach_ipip_input_next +#undef _ + }, + .format_trace = format_ipip_rx_trace, +}; + +VLIB_NODE_FUNCTION_MULTIARCH(ipip4_input_node, ipip4_input) +VLIB_NODE_FUNCTION_MULTIARCH(ipip6_input_node, ipip6_input) +/* *INDENT-ON* */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |