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authorOle Troan <ot@cisco.com>2020-07-01 13:16:16 +0200
committerAndrew Yourtchenko <ayourtch@gmail.com>2020-07-02 13:13:27 +0000
commit96068d6b94207435f9c9619e2ce7921ebc812ade (patch)
treef7f36f8cc2dfc70730102d72b0ea254d10f84457 /src/plugins/nat/nat66_in2out.c
parentc6eae9c079defa4812270945d614c4598db262d8 (diff)
nat: nat66 to plugin
Type: refactor Change-Id: I8c1f0c02a4522c1f9e461ddadd59938579ec00c6 Signed-off-by: Ole Troan <ot@cisco.com>
Diffstat (limited to 'src/plugins/nat/nat66_in2out.c')
-rw-r--r--src/plugins/nat/nat66_in2out.c262
1 files changed, 0 insertions, 262 deletions
diff --git a/src/plugins/nat/nat66_in2out.c b/src/plugins/nat/nat66_in2out.c
deleted file mode 100644
index 437d66550f6..00000000000
--- a/src/plugins/nat/nat66_in2out.c
+++ /dev/null
@@ -1,262 +0,0 @@
-/*
- * 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 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 NAT66 inside to outside network translation
- */
-
-#include <nat/nat66.h>
-#include <vnet/ip/ip6_to_ip4.h>
-#include <vnet/fib/fib_table.h>
-
-typedef struct
-{
- u32 sw_if_index;
- u32 next_index;
-} nat66_in2out_trace_t;
-
-static u8 *
-format_nat66_in2out_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 *);
- nat66_in2out_trace_t *t = va_arg (*args, nat66_in2out_trace_t *);
-
- s =
- format (s, "NAT66-in2out: sw_if_index %d, next index %d", t->sw_if_index,
- t->next_index);
-
- return s;
-}
-
-#define foreach_nat66_in2out_error \
-_(IN2OUT_PACKETS, "good in2out packets processed") \
-_(NO_TRANSLATION, "no translation") \
-_(UNKNOWN, "unknown")
-
-typedef enum
-{
-#define _(sym,str) NAT66_IN2OUT_ERROR_##sym,
- foreach_nat66_in2out_error
-#undef _
- NAT66_IN2OUT_N_ERROR,
-} nat66_in2out_error_t;
-
-static char *nat66_in2out_error_strings[] = {
-#define _(sym,string) string,
- foreach_nat66_in2out_error
-#undef _
-};
-
-typedef enum
-{
- NAT66_IN2OUT_NEXT_IP6_LOOKUP,
- NAT66_IN2OUT_NEXT_DROP,
- NAT66_IN2OUT_N_NEXT,
-} nat66_in2out_next_t;
-
-static inline u8
-nat66_not_translate (u32 rx_fib_index, ip6_address_t ip6_addr)
-{
- nat66_main_t *nm = &nat66_main;
- u32 sw_if_index;
- snat_interface_t *i;
- fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
- fib_prefix_t pfx = {
- .fp_proto = FIB_PROTOCOL_IP6,
- .fp_len = 128,
- .fp_addr = {
- .ip6 = ip6_addr,
- },
- };
-
- fei = fib_table_lookup (rx_fib_index, &pfx);
- if (FIB_NODE_INDEX_INVALID == fei)
- return 1;
- sw_if_index = fib_entry_get_resolving_interface (fei);
-
- if (sw_if_index == ~0)
- {
- fei = fib_table_lookup (nm->outside_fib_index, &pfx);
- if (FIB_NODE_INDEX_INVALID == fei)
- return 1;
- sw_if_index = fib_entry_get_resolving_interface (fei);
- }
-
- /* *INDENT-OFF* */
- pool_foreach (i, nm->interfaces,
- ({
- /* NAT packet aimed at outside interface */
- if (nat_interface_is_outside (i) && sw_if_index == i->sw_if_index)
- return 0;
- }));
- /* *INDENT-ON* */
-
- return 1;
-}
-
-VLIB_NODE_FN (nat66_in2out_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- u32 n_left_from, *from, *to_next;
- nat66_in2out_next_t next_index;
- u32 pkts_processed = 0;
- u32 thread_index = vm->thread_index;
- nat66_main_t *nm = &nat66_main;
-
- 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 = NAT66_IN2OUT_NEXT_IP6_LOOKUP;
- ip6_header_t *ip60;
- u16 l4_offset0, frag_offset0;
- u8 l4_protocol0;
- nat66_static_mapping_t *sm0;
- u32 sw_if_index0, fib_index0;
- udp_header_t *udp0;
- tcp_header_t *tcp0;
- icmp46_header_t *icmp0;
- u16 *checksum0 = 0;
- ip_csum_t csum0;
-
- /* 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);
- ip60 = vlib_buffer_get_current (b0);
-
- if (PREDICT_FALSE
- (ip6_parse
- (vm, b0, ip60, b0->current_length, &l4_protocol0, &l4_offset0,
- &frag_offset0)))
- {
- next0 = NAT66_IN2OUT_NEXT_DROP;
- b0->error = node->errors[NAT66_IN2OUT_ERROR_UNKNOWN];
- goto trace0;
- }
-
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- fib_index0 =
- fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP6,
- sw_if_index0);
-
- if (nat66_not_translate (fib_index0, ip60->dst_address))
- goto trace0;
-
- sm0 = nat66_static_mapping_get (&ip60->src_address, fib_index0, 1);
- if (PREDICT_FALSE (!sm0))
- {
- goto trace0;
- }
-
- if (l4_protocol0 == IP_PROTOCOL_UDP)
- {
- udp0 = (udp_header_t *) u8_ptr_add (ip60, l4_offset0);
- checksum0 = &udp0->checksum;
- }
- else if (l4_protocol0 == IP_PROTOCOL_TCP)
- {
- tcp0 = (tcp_header_t *) u8_ptr_add (ip60, l4_offset0);
- checksum0 = &tcp0->checksum;
- }
- else if (l4_protocol0 == IP_PROTOCOL_ICMP6)
- {
- icmp0 = (icmp46_header_t *) u8_ptr_add (ip60, l4_offset0);
- checksum0 = &icmp0->checksum;
- }
- else
- goto skip_csum0;
-
- csum0 = ip_csum_sub_even (*checksum0, ip60->src_address.as_u64[0]);
- csum0 = ip_csum_sub_even (csum0, ip60->src_address.as_u64[1]);
- csum0 = ip_csum_add_even (csum0, sm0->e_addr.as_u64[0]);
- csum0 = ip_csum_add_even (csum0, sm0->e_addr.as_u64[1]);
- *checksum0 = ip_csum_fold (csum0);
-
- skip_csum0:
- ip60->src_address.as_u64[0] = sm0->e_addr.as_u64[0];
- ip60->src_address.as_u64[1] = sm0->e_addr.as_u64[1];
-
- vlib_increment_combined_counter (&nm->session_counters,
- thread_index, sm0 - nm->sm, 1,
- vlib_buffer_length_in_chain (vm,
- b0));
-
- trace0:
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat66_in2out_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- t->next_index = next0;
- }
-
- pkts_processed += next0 != NAT66_IN2OUT_NEXT_DROP;
-
- /* 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);
- }
-
- vlib_node_increment_counter (vm, nm->in2out_node_index,
- NAT66_IN2OUT_ERROR_IN2OUT_PACKETS,
- pkts_processed);
- return frame->n_vectors;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (nat66_in2out_node) = {
- .name = "nat66-in2out",
- .vector_size = sizeof (u32),
- .format_trace = format_nat66_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN (nat66_in2out_error_strings),
- .error_strings = nat66_in2out_error_strings,
- .n_next_nodes = NAT66_IN2OUT_N_NEXT,
- /* edit / add dispositions here */
- .next_nodes = {
- [NAT66_IN2OUT_NEXT_DROP] = "error-drop",
- [NAT66_IN2OUT_NEXT_IP6_LOOKUP] = "ip6-lookup",
- },
-};
-/* *INDENT-ON* */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */