diff options
Diffstat (limited to 'src/vnet/l2tp/encap.c')
| -rw-r--r-- | src/vnet/l2tp/encap.c | 235 |
1 files changed, 0 insertions, 235 deletions
diff --git a/src/vnet/l2tp/encap.c b/src/vnet/l2tp/encap.c deleted file mode 100644 index 8863ddfa20d..00000000000 --- a/src/vnet/l2tp/encap.c +++ /dev/null @@ -1,235 +0,0 @@ -/* - * encap.c : L2TPv3 tunnel encapsulation - * - * Copyright (c) 2013 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 <vppinfra/error.h> -#include <vppinfra/hash.h> -#include <vnet/vnet.h> -#include <vnet/ip/ip.h> -#include <vnet/ethernet/ethernet.h> -#include <vnet/l2tp/l2tp.h> - -/* Statistics (not really errors) */ -#define foreach_l2t_encap_error \ -_(NETWORK_TO_USER, "L2TP L2 network to user (ip6) pkts") \ -_(LOOKUP_FAIL_TO_L3, "L2TP L2 session lookup failed pkts") \ -_(ADMIN_DOWN, "L2TP tunnel is down") - -static char *l2t_encap_error_strings[] = { -#define _(sym,string) string, - foreach_l2t_encap_error -#undef _ -}; - -typedef enum -{ -#define _(sym,str) L2T_ENCAP_ERROR_##sym, - foreach_l2t_encap_error -#undef _ - L2T_ENCAP_N_ERROR, -} l2t_encap_error_t; - - -typedef enum -{ - L2T_ENCAP_NEXT_DROP, - L2T_ENCAP_NEXT_IP6_LOOKUP, - L2T_ENCAP_N_NEXT, -} l2t_encap_next_t; - -typedef struct -{ - u32 cached_session_index; - u32 cached_sw_if_index; - vnet_main_t *vnet_main; -} l2tp_encap_runtime_t; - -extern vlib_node_registration_t l2t_encap_node; - -#define NSTAGES 3 - -static inline void -stage0 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_buffer_t * b) -{ - vlib_prefetch_buffer_header (b, STORE); - CLIB_PREFETCH (b->data, 2 * CLIB_CACHE_LINE_BYTES, STORE); -} - -static inline void -stage1 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_buffer_t * b) -{ - l2tp_encap_runtime_t *rt = (void *) node->runtime_data; - vnet_hw_interface_t *hi; - - u32 sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_TX]; - u32 session_index = rt->cached_session_index; - - if (PREDICT_FALSE (rt->cached_sw_if_index != sw_if_index)) - { - hi = vnet_get_sup_hw_interface (rt->vnet_main, sw_if_index); - session_index = rt->cached_session_index = hi->dev_instance; - rt->cached_sw_if_index = sw_if_index; - } - - /* Remember mapping index, prefetch the mini counter */ - vnet_buffer (b)->l2t.next_index = L2T_ENCAP_NEXT_IP6_LOOKUP; - vnet_buffer (b)->l2t.session_index = session_index; - - /* $$$$ prefetch counter... */ -} - -static inline u32 -last_stage (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_buffer_t * b) -{ - l2t_main_t *lm = &l2t_main; - vlib_node_t *n = vlib_get_node (vm, l2t_encap_node.index); - u32 node_counter_base_index = n->error_heap_index; - vlib_error_main_t *em = &vm->error_main; - l2tpv3_header_t *l2tp; - u32 session_index; - u32 counter_index; - l2t_session_t *s; - ip6_header_t *ip6; - u16 payload_length; - u32 next_index = L2T_ENCAP_NEXT_IP6_LOOKUP; - - /* Other-than-output pkt? We're done... */ - if (vnet_buffer (b)->l2t.next_index != L2T_ENCAP_NEXT_IP6_LOOKUP) - return vnet_buffer (b)->l2t.next_index; - - em->counters[node_counter_base_index + L2T_ENCAP_ERROR_NETWORK_TO_USER] += - 1; - - session_index = vnet_buffer (b)->l2t.session_index; - - counter_index = - session_index_to_counter_index (session_index, - SESSION_COUNTER_NETWORK_TO_USER); - - /* per-mapping byte stats include the ethernet header */ - vlib_increment_combined_counter (&lm->counter_main, - vlib_get_thread_index (), - counter_index, 1 /* packet_increment */ , - vlib_buffer_length_in_chain (vm, b)); - - s = pool_elt_at_index (lm->sessions, session_index); - - vnet_buffer (b)->sw_if_index[VLIB_TX] = s->encap_fib_index; - - /* Paint on an l2tpv3 hdr */ - vlib_buffer_advance (b, -(s->l2tp_hdr_size)); - l2tp = vlib_buffer_get_current (b); - - l2tp->session_id = s->remote_session_id; - l2tp->cookie = s->remote_cookie; - if (PREDICT_FALSE (s->l2_sublayer_present)) - { - l2tp->l2_specific_sublayer = 0; - } - - /* Paint on an ip6 header */ - vlib_buffer_advance (b, -(sizeof (*ip6))); - ip6 = vlib_buffer_get_current (b); - - if (PREDICT_FALSE (!(s->admin_up))) - { - b->error = node->errors[L2T_ENCAP_ERROR_ADMIN_DOWN]; - next_index = L2T_ENCAP_NEXT_DROP; - goto done; - } - - ip6->ip_version_traffic_class_and_flow_label = - clib_host_to_net_u32 (0x6 << 28); - - /* calculate ip6 payload length */ - payload_length = vlib_buffer_length_in_chain (vm, b); - payload_length -= sizeof (*ip6); - - ip6->payload_length = clib_host_to_net_u16 (payload_length); - ip6->protocol = IP_PROTOCOL_L2TP; - ip6->hop_limit = 0xff; - ip6->src_address.as_u64[0] = s->our_address.as_u64[0]; - ip6->src_address.as_u64[1] = s->our_address.as_u64[1]; - ip6->dst_address.as_u64[0] = s->client_address.as_u64[0]; - ip6->dst_address.as_u64[1] = s->client_address.as_u64[1]; - - -done: - if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED)) - { - l2t_trace_t *t = vlib_add_trace (vm, node, b, sizeof (*t)); - t->is_user_to_network = 0; - t->our_address.as_u64[0] = ip6->src_address.as_u64[0]; - t->our_address.as_u64[1] = ip6->src_address.as_u64[1]; - t->client_address.as_u64[0] = ip6->dst_address.as_u64[0]; - t->client_address.as_u64[1] = ip6->dst_address.as_u64[1]; - t->session_index = session_index; - } - - return next_index; -} - -#include <vnet/pipeline.h> - -VLIB_NODE_FN (l2t_encap_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - return dispatch_pipeline (vm, node, frame); -} - - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (l2t_encap_node) = { - .name = "l2tp-encap", - .vector_size = sizeof (u32), - .format_trace = format_l2t_trace, - .type = VLIB_NODE_TYPE_INTERNAL, - .runtime_data_bytes = sizeof (l2tp_encap_runtime_t), - - .n_errors = ARRAY_LEN(l2t_encap_error_strings), - .error_strings = l2t_encap_error_strings, - - .n_next_nodes = L2T_ENCAP_N_NEXT, - - /* add dispositions here */ - .next_nodes = { - [L2T_ENCAP_NEXT_IP6_LOOKUP] = "ip6-lookup", - [L2T_ENCAP_NEXT_DROP] = "error-drop", - }, -}; -/* *INDENT-ON* */ - -#ifndef CLIB_MARCH_VARIANT -void -l2tp_encap_init (vlib_main_t * vm) -{ - l2tp_encap_runtime_t *rt; - - rt = vlib_node_get_runtime_data (vm, l2t_encap_node.index); - rt->vnet_main = vnet_get_main (); - rt->cached_sw_if_index = (u32) ~ 0; - rt->cached_session_index = (u32) ~ 0; -} -#endif /* CLIB_MARCH_VARIANT */ - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |