From 2c6639c695aebf0cd5ac74ad31fd331547fa0126 Mon Sep 17 00:00:00 2001 From: Ole Troan Date: Thu, 19 Dec 2019 11:55:54 +0100 Subject: nat: move dslite to separate sub-plugin Type: refactor Change-Id: If3d9f16f3a06c10b354f1eef674e8db5f3c44de7 Signed-off-by: Ole Troan --- src/plugins/nat/dslite_out2in.c | 294 ---------------------------------------- 1 file changed, 294 deletions(-) delete mode 100644 src/plugins/nat/dslite_out2in.c (limited to 'src/plugins/nat/dslite_out2in.c') diff --git a/src/plugins/nat/dslite_out2in.c b/src/plugins/nat/dslite_out2in.c deleted file mode 100644 index 265d79fc53e..00000000000 --- a/src/plugins/nat/dslite_out2in.c +++ /dev/null @@ -1,294 +0,0 @@ -/* - * Copyright (c) 2017 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 -#include - -typedef enum -{ - DSLITE_OUT2IN_NEXT_IP4_LOOKUP, - DSLITE_OUT2IN_NEXT_IP6_LOOKUP, - DSLITE_OUT2IN_NEXT_DROP, - DSLITE_OUT2IN_N_NEXT, -} dslite_out2in_next_t; - -static char *dslite_out2in_error_strings[] = { -#define _(sym,string) string, - foreach_dslite_error -#undef _ -}; - -static inline u32 -dslite_icmp_out2in (dslite_main_t * dm, ip4_header_t * ip4, - dslite_session_t ** sp, u32 next, u8 * error, - u32 thread_index) -{ - dslite_session_t *s = 0; - icmp46_header_t *icmp = ip4_next_header (ip4); - clib_bihash_kv_8_8_t kv, value; - snat_session_key_t key; - u32 n = next; - icmp_echo_header_t *echo; - u32 new_addr, old_addr; - u16 old_id, new_id; - ip_csum_t sum; - - echo = (icmp_echo_header_t *) (icmp + 1); - - if (icmp_type_is_error_message (icmp->type) - || (icmp->type != ICMP4_echo_reply)) - { - n = DSLITE_OUT2IN_NEXT_DROP; - *error = DSLITE_ERROR_BAD_ICMP_TYPE; - goto done; - } - - key.addr = ip4->dst_address; - key.port = echo->identifier; - key.protocol = SNAT_PROTOCOL_ICMP; - key.fib_index = 0; - kv.key = key.as_u64; - - if (clib_bihash_search_8_8 - (&dm->per_thread_data[thread_index].out2in, &kv, &value)) - { - next = DSLITE_OUT2IN_NEXT_DROP; - *error = DSLITE_ERROR_NO_TRANSLATION; - goto done; - } - else - { - s = - pool_elt_at_index (dm->per_thread_data[thread_index].sessions, - value.value); - } - - old_id = echo->identifier; - echo->identifier = new_id = s->in2out.port; - sum = icmp->checksum; - sum = ip_csum_update (sum, old_id, new_id, icmp_echo_header_t, identifier); - icmp->checksum = ip_csum_fold (sum); - - old_addr = ip4->dst_address.as_u32; - ip4->dst_address = s->in2out.addr; - new_addr = ip4->dst_address.as_u32; - - sum = ip4->checksum; - sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address); - ip4->checksum = ip_csum_fold (sum); - -done: - *sp = s; - return n; -} - -VLIB_NODE_FN (dslite_out2in_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - u32 n_left_from, *from, *to_next; - dslite_out2in_next_t next_index; - vlib_node_runtime_t *error_node; - u32 thread_index = vm->thread_index; - f64 now = vlib_time_now (vm); - dslite_main_t *dm = &dslite_main; - - error_node = vlib_node_get_runtime (vm, dm->dslite_out2in_node_index); - - from = vlib_frame_vector_args (frame); - n_left_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 > 0 && n_left_to_next > 0) - { - u32 bi0; - vlib_buffer_t *b0; - u32 next0 = DSLITE_OUT2IN_NEXT_IP6_LOOKUP; - u8 error0 = DSLITE_ERROR_OUT2IN; - ip4_header_t *ip40; - ip6_header_t *ip60; - u32 proto0; - udp_header_t *udp0; - tcp_header_t *tcp0; - clib_bihash_kv_8_8_t kv0, value0; - snat_session_key_t key0; - dslite_session_t *s0 = 0; - ip_csum_t sum0; - u32 new_addr0, old_addr0; - u16 new_port0, old_port0; - - /* speculatively enqueue b0 to the current next frame */ - 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); - ip40 = vlib_buffer_get_current (b0); - proto0 = ip_proto_to_snat_proto (ip40->protocol); - - if (PREDICT_FALSE (proto0 == ~0)) - { - error0 = DSLITE_ERROR_UNSUPPORTED_PROTOCOL; - next0 = DSLITE_OUT2IN_NEXT_DROP; - goto trace0; - } - - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = - dslite_icmp_out2in (dm, ip40, &s0, next0, &error0, - thread_index); - if (PREDICT_FALSE (next0 == DSLITE_OUT2IN_NEXT_DROP)) - goto trace0; - - goto encap0; - } - - udp0 = ip4_next_header (ip40); - tcp0 = (tcp_header_t *) udp0; - - key0.addr = ip40->dst_address; - key0.port = udp0->dst_port; - key0.protocol = proto0; - key0.fib_index = 0; - kv0.key = key0.as_u64; - - if (clib_bihash_search_8_8 - (&dm->per_thread_data[thread_index].out2in, &kv0, &value0)) - { - next0 = DSLITE_OUT2IN_NEXT_DROP; - error0 = DSLITE_ERROR_NO_TRANSLATION; - goto trace0; - } - else - { - s0 = - pool_elt_at_index (dm->per_thread_data[thread_index].sessions, - value0.value); - } - - old_addr0 = ip40->dst_address.as_u32; - ip40->dst_address = s0->in2out.addr; - new_addr0 = ip40->dst_address.as_u32; - - sum0 = ip40->checksum; - sum0 = - ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - ip40->checksum = ip_csum_fold (sum0); - - if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) - { - old_port0 = tcp0->dst_port; - tcp0->dst_port = s0->in2out.port; - new_port0 = tcp0->dst_port; - - sum0 = tcp0->checksum; - sum0 = - ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - sum0 = - ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, - length); - tcp0->checksum = ip_csum_fold (sum0); - } - else - { - old_port0 = udp0->dst_port; - udp0->dst_port = s0->in2out.port; - udp0->checksum = 0; - } - - encap0: - /* Construct IPv6 header */ - vlib_buffer_advance (b0, -(sizeof (ip6_header_t))); - ip60 = vlib_buffer_get_current (b0); - ip60->ip_version_traffic_class_and_flow_label = - clib_host_to_net_u32 ((6 << 28) + (ip40->tos << 20)); - ip60->payload_length = ip40->length; - ip60->protocol = IP_PROTOCOL_IP_IN_IP; - ip60->hop_limit = ip40->ttl; - ip60->src_address.as_u64[0] = dm->aftr_ip6_addr.as_u64[0]; - ip60->src_address.as_u64[1] = dm->aftr_ip6_addr.as_u64[1]; - ip60->dst_address.as_u64[0] = s0->in2out.softwire_id.as_u64[0]; - ip60->dst_address.as_u64[1] = s0->in2out.softwire_id.as_u64[1]; - - /* Accounting */ - s0->last_heard = now; - s0->total_pkts++; - s0->total_bytes += vlib_buffer_length_in_chain (vm, b0); - /* Per-B4 LRU list maintenance */ - clib_dlist_remove (dm->per_thread_data[thread_index].list_pool, - s0->per_b4_index); - clib_dlist_addtail (dm->per_thread_data[thread_index].list_pool, - s0->per_b4_list_head_index, s0->per_b4_index); - trace0: - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - dslite_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); - t->next_index = next0; - t->session_index = ~0; - if (s0) - t->session_index = - s0 - dm->per_thread_data[thread_index].sessions; - } - - b0->error = error_node->errors[error0]; - - /* verify speculative enqueue, maybe switch current next frame */ - 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); - } - - return frame->n_vectors; -} - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (dslite_out2in_node) = { - .name = "dslite-out2in", - .vector_size = sizeof (u32), - .format_trace = format_dslite_trace, - .type = VLIB_NODE_TYPE_INTERNAL, - .n_errors = ARRAY_LEN (dslite_out2in_error_strings), - .error_strings = dslite_out2in_error_strings, - .n_next_nodes = DSLITE_OUT2IN_N_NEXT, - /* edit / add dispositions here */ - .next_nodes = { - [DSLITE_OUT2IN_NEXT_DROP] = "error-drop", - [DSLITE_OUT2IN_NEXT_IP4_LOOKUP] = "ip4-lookup", - [DSLITE_OUT2IN_NEXT_IP6_LOOKUP] = "ip6-lookup", - }, -}; -/* *INDENT-ON* */ - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ -- cgit 1.2.3-korg