- 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 (PREDICT_FALSE (nat_reass_is_drop_frag (1)))
- {
- next0 = NAT64_IN2OUT_NEXT_DROP;
- b0->error = node->errors[NAT64_IN2OUT_ERROR_DROP_FRAGMENT];
- goto trace0;
- }
-
- ip60 = (ip6_header_t *) vlib_buffer_get_current (b0);
-
- if (PREDICT_FALSE
- (ip6_parse
- (ip60, b0->current_length, &l4_protocol0, &l4_offset0,
- &frag_offset0)))
- {
- next0 = NAT64_IN2OUT_NEXT_DROP;
- b0->error = node->errors[NAT64_IN2OUT_ERROR_UNKNOWN];
- goto trace0;
- }
-
- if (PREDICT_FALSE
- (!(l4_protocol0 == IP_PROTOCOL_TCP
- || l4_protocol0 == IP_PROTOCOL_UDP)))
- {
- next0 = NAT64_IN2OUT_NEXT_DROP;
- b0->error = node->errors[NAT64_IN2OUT_ERROR_DROP_FRAGMENT];
- goto trace0;
- }
-
- udp0 = (udp_header_t *) u8_ptr_add (ip60, l4_offset0);
- frag0 = (ip6_frag_hdr_t *) u8_ptr_add (ip60, frag_offset0);
- proto0 = ip_proto_to_snat_proto (l4_protocol0);
-
- reass0 = nat_ip6_reass_find_or_create (ip60->src_address,
- ip60->dst_address,
- frag0->identification,
- l4_protocol0,
- 1, &fragments_to_drop);
-
- if (PREDICT_FALSE (!reass0))
- {
- next0 = NAT64_IN2OUT_NEXT_DROP;
- b0->error = node->errors[NAT64_IN2OUT_ERROR_MAX_REASS];
- goto trace0;
- }
-
- if (PREDICT_TRUE (ip6_frag_hdr_offset (frag0)))
- {
- ctx0.first_frag = 0;
- if (PREDICT_FALSE (reass0->sess_index == (u32) ~ 0))
- {
- if (nat_ip6_reass_add_fragment (reass0, bi0))
- {
- b0->error = node->errors[NAT64_IN2OUT_ERROR_MAX_FRAG];
- next0 = NAT64_IN2OUT_NEXT_DROP;
- goto trace0;
- }
- cached0 = 1;
- goto trace0;
- }
- }
- else
- {
- ctx0.first_frag = 1;
-
- saddr0.as_u64[0] = ip60->src_address.as_u64[0];
- saddr0.as_u64[1] = ip60->src_address.as_u64[1];
- daddr0.as_u64[0] = ip60->dst_address.as_u64[0];
- daddr0.as_u64[1] = ip60->dst_address.as_u64[1];
-
- ste0 =
- nat64_db_st_entry_find (&nm->db, &saddr0, &daddr0,
- udp0->src_port, udp0->dst_port,
- l4_protocol0, fib_index0, 1);
- if (!ste0)
- {
- bibe0 =
- nat64_db_bib_entry_find (&nm->db, &saddr0, udp0->src_port,
- l4_protocol0, fib_index0, 1);
- if (!bibe0)
- {
- u16 out_port0;
- ip4_address_t out_addr0;
- if (nat64_alloc_out_addr_and_port
- (fib_index0, proto0, &out_addr0, &out_port0))
- {
- next0 = NAT64_IN2OUT_NEXT_DROP;
- b0->error =
- node->errors[NAT64_IN2OUT_ERROR_NO_TRANSLATION];
- goto trace0;
- }
-
- bibe0 =
- nat64_db_bib_entry_create (&nm->db,
- &ip60->src_address,
- &out_addr0, udp0->src_port,
- clib_host_to_net_u16
- (out_port0), fib_index0,
- l4_protocol0, 0);
- if (!bibe0)
- {
- next0 = NAT64_IN2OUT_NEXT_DROP;
- b0->error =
- node->errors[NAT64_IN2OUT_ERROR_NO_TRANSLATION];
- goto trace0;
- }
- }
- nat64_extract_ip4 (&ip60->dst_address, &daddr0.ip4,
- fib_index0);
- ste0 =
- nat64_db_st_entry_create (&nm->db, bibe0,
- &ip60->dst_address, &daddr0.ip4,
- udp0->dst_port);
- if (!ste0)
- {
- next0 = NAT64_IN2OUT_NEXT_DROP;
- b0->error =
- node->errors[NAT64_IN2OUT_ERROR_NO_TRANSLATION];
- goto trace0;
- }
- }
- reass0->sess_index =
- nat64_db_st_entry_get_index (&nm->db, ste0);
-
- nat_ip6_reass_get_frags (reass0, &fragments_to_loopback);
- }
-
- ctx0.sess_index = reass0->sess_index;
- ctx0.proto = l4_protocol0;
- ctx0.vm = vm;
- ctx0.l4_offset = l4_offset0;
-
- if (PREDICT_FALSE (is_hairpinning (&ip60->dst_address)))
- {
- next0 = NAT64_IN2OUT_NEXT_IP6_LOOKUP;
- if (nat64_in2out_frag_hairpinning (b0, ip60, &ctx0))
- {
- next0 = NAT64_IN2OUT_NEXT_DROP;
- b0->error = node->errors[NAT64_IN2OUT_ERROR_NO_TRANSLATION];
- }
- goto trace0;
- }
- else
- {
- if (ip6_to_ip4_fragmented (b0, nat64_in2out_frag_set_cb, &ctx0))
- {
- next0 = NAT64_IN2OUT_NEXT_DROP;
- b0->error = node->errors[NAT64_IN2OUT_ERROR_UNKNOWN];
- goto trace0;
- }
- }
-
- trace0:
- if (PREDICT_FALSE
- ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat64_in2out_reass_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->cached = cached0;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- }