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authorFilip Varga <fivarga@cisco.com>2020-09-14 11:20:16 +0200
committerOle Tr�an <otroan@employees.org>2020-10-07 09:05:50 +0000
commit1f36023d29137825b8a09578d09b955046c2415b (patch)
treec00726718d9d8b4f5ecc74c45d9a2d790deb0250 /src/plugins/nat/nat64_in2out.c
parentd1762e614d1e05cbeda4d91e921fa663b2b46c03 (diff)
nat: move nat64 to a subfeature
Type: refactor Change-Id: I3b9e17164647d2019b1f40cffeed63393345219e Signed-off-by: Filip Varga <fivarga@cisco.com>
Diffstat (limited to 'src/plugins/nat/nat64_in2out.c')
-rw-r--r--src/plugins/nat/nat64_in2out.c1416
1 files changed, 0 insertions, 1416 deletions
diff --git a/src/plugins/nat/nat64_in2out.c b/src/plugins/nat/nat64_in2out.c
deleted file mode 100644
index 1928bf899a6..00000000000
--- a/src/plugins/nat/nat64_in2out.c
+++ /dev/null
@@ -1,1416 +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.
- */
-/**
- * @file
- * @brief NAT64 IPv6 to IPv4 translation (inside to outside network)
- */
-
-#include <nat/nat64.h>
-#include <nat/nat_inlines.h>
-#include <vnet/ip/ip6_to_ip4.h>
-#include <vnet/fib/fib_table.h>
-#include <nat/lib/nat_inlines.h>
-
-typedef struct
-{
- u32 sw_if_index;
- u32 next_index;
- u8 is_slow_path;
-} nat64_in2out_trace_t;
-
-static u8 *
-format_nat64_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 *);
- nat64_in2out_trace_t *t = va_arg (*args, nat64_in2out_trace_t *);
- char *tag;
-
- tag = t->is_slow_path ? "NAT64-in2out-slowpath" : "NAT64-in2out";
-
- s =
- format (s, "%s: sw_if_index %d, next index %d", tag, t->sw_if_index,
- t->next_index);
-
- return s;
-}
-
-#define foreach_nat64_in2out_error \
-_(UNSUPPORTED_PROTOCOL, "unsupported protocol") \
-_(NO_TRANSLATION, "no translation") \
-_(UNKNOWN, "unknown")
-
-
-typedef enum
-{
-#define _(sym,str) NAT64_IN2OUT_ERROR_##sym,
- foreach_nat64_in2out_error
-#undef _
- NAT64_IN2OUT_N_ERROR,
-} nat64_in2out_error_t;
-
-static char *nat64_in2out_error_strings[] = {
-#define _(sym,string) string,
- foreach_nat64_in2out_error
-#undef _
-};
-
-typedef enum
-{
- NAT64_IN2OUT_NEXT_IP4_LOOKUP,
- NAT64_IN2OUT_NEXT_IP6_LOOKUP,
- NAT64_IN2OUT_NEXT_DROP,
- NAT64_IN2OUT_NEXT_SLOWPATH,
- NAT64_IN2OUT_N_NEXT,
-} nat64_in2out_next_t;
-
-typedef struct nat64_in2out_set_ctx_t_
-{
- vlib_buffer_t *b;
- vlib_main_t *vm;
- u32 thread_index;
-} nat64_in2out_set_ctx_t;
-
-static inline u8
-nat64_not_translate (u32 sw_if_index, ip6_address_t ip6_addr)
-{
- ip6_address_t *addr;
- ip6_main_t *im6 = &ip6_main;
- ip_lookup_main_t *lm6 = &im6->lookup_main;
- ip_interface_address_t *ia = 0;
-
- /* *INDENT-OFF* */
- foreach_ip_interface_address (lm6, ia, sw_if_index, 0,
- ({
- addr = ip_interface_address_get_address (lm6, ia);
- if (0 == ip6_address_compare (addr, &ip6_addr))
- return 1;
- }));
- /* *INDENT-ON* */
-
- return 0;
-}
-
-/**
- * @brief Check whether is a hairpinning.
- *
- * If the destination IP address of the packet is an IPv4 address assigned to
- * the NAT64 itself, then the packet is a hairpin packet.
- *
- * param dst_addr Destination address of the packet.
- *
- * @returns 1 if hairpinning, otherwise 0.
- */
-static_always_inline int
-is_hairpinning (ip6_address_t * dst_addr)
-{
- nat64_main_t *nm = &nat64_main;
- int i;
-
- for (i = 0; i < vec_len (nm->addr_pool); i++)
- {
- if (nm->addr_pool[i].addr.as_u32 == dst_addr->as_u32[3])
- return 1;
- }
-
- return 0;
-}
-
-static int
-nat64_in2out_tcp_udp (vlib_main_t * vm, vlib_buffer_t * p, u16 l4_offset,
- u16 frag_hdr_offset, nat64_in2out_set_ctx_t * ctx)
-{
- ip6_header_t *ip6;
- ip_csum_t csum = 0;
- ip4_header_t *ip4;
- u16 fragment_id;
- u8 frag_more;
- u16 frag_offset;
- nat64_main_t *nm = &nat64_main;
- nat64_db_bib_entry_t *bibe;
- nat64_db_st_entry_t *ste;
- ip46_address_t old_saddr, old_daddr;
- ip4_address_t new_daddr;
- u32 sw_if_index, fib_index;
- u8 proto = vnet_buffer (p)->ip.reass.ip_proto;
- u16 sport = vnet_buffer (p)->ip.reass.l4_src_port;
- u16 dport = vnet_buffer (p)->ip.reass.l4_dst_port;
- nat64_db_t *db = &nm->db[ctx->thread_index];
-
- ip6 = vlib_buffer_get_current (p);
-
- vlib_buffer_advance (p, l4_offset - sizeof (*ip4));
- ip4 = vlib_buffer_get_current (p);
-
- u32 ip_version_traffic_class_and_flow_label =
- ip6->ip_version_traffic_class_and_flow_label;
- u16 payload_length = ip6->payload_length;
- u8 hop_limit = ip6->hop_limit;
-
- old_saddr.as_u64[0] = ip6->src_address.as_u64[0];
- old_saddr.as_u64[1] = ip6->src_address.as_u64[1];
- old_daddr.as_u64[0] = ip6->dst_address.as_u64[0];
- old_daddr.as_u64[1] = ip6->dst_address.as_u64[1];
-
- if (PREDICT_FALSE (frag_hdr_offset))
- {
- //Only the first fragment
- ip6_frag_hdr_t *hdr =
- (ip6_frag_hdr_t *) u8_ptr_add (ip6, frag_hdr_offset);
- fragment_id = frag_id_6to4 (hdr->identification);
- frag_more = ip6_frag_hdr_more (hdr);
- frag_offset = ip6_frag_hdr_offset (hdr);
- }
- else
- {
- fragment_id = 0;
- frag_offset = 0;
- frag_more = 0;
- }
-
- ip4->ip_version_and_header_length =
- IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
- ip4->tos = ip6_translate_tos (ip_version_traffic_class_and_flow_label);
- ip4->length =
- u16_net_add (payload_length, sizeof (*ip4) + sizeof (*ip6) - l4_offset);
- ip4->fragment_id = fragment_id;
- ip4->flags_and_fragment_offset =
- clib_host_to_net_u16 (frag_offset |
- (frag_more ? IP4_HEADER_FLAG_MORE_FRAGMENTS : 0));
- ip4->ttl = hop_limit;
- ip4->protocol = (proto == IP_PROTOCOL_ICMP6) ? IP_PROTOCOL_ICMP : proto;
-
- sw_if_index = vnet_buffer (ctx->b)->sw_if_index[VLIB_RX];
- fib_index =
- fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP6, sw_if_index);
-
- ste =
- nat64_db_st_entry_find (db, &old_saddr, &old_daddr, sport, dport, proto,
- fib_index, 1);
-
- if (ste)
- {
- bibe = nat64_db_bib_entry_by_index (db, proto, ste->bibe_index);
- if (!bibe)
- return -1;
- }
- else
- {
- bibe =
- nat64_db_bib_entry_find (db, &old_saddr, sport, proto, fib_index, 1);
-
- if (!bibe)
- {
- u16 out_port;
- ip4_address_t out_addr;
- if (nat64_alloc_out_addr_and_port
- (fib_index, ip_proto_to_nat_proto (proto), &out_addr,
- &out_port, ctx->thread_index))
- return -1;
-
- bibe =
- nat64_db_bib_entry_create (ctx->thread_index, db,
- &old_saddr.ip6, &out_addr, sport,
- out_port, fib_index, proto, 0);
- if (!bibe)
- return -1;
-
- vlib_set_simple_counter (&nm->total_bibs, ctx->thread_index, 0,
- db->bib.bib_entries_num);
- }
-
- nat64_extract_ip4 (&old_daddr.ip6, &new_daddr, fib_index);
- ste =
- nat64_db_st_entry_create (ctx->thread_index, db, bibe,
- &old_daddr.ip6, &new_daddr, dport);
- if (!ste)
- return -1;
-
- vlib_set_simple_counter (&nm->total_sessions, ctx->thread_index, 0,
- db->st.st_entries_num);
- }
-
- ip4->src_address.as_u32 = bibe->out_addr.as_u32;
- ip4->dst_address.as_u32 = ste->out_r_addr.as_u32;
-
- ip4->checksum = ip4_header_checksum (ip4);
-
- if (!vnet_buffer (p)->ip.reass.is_non_first_fragment)
- {
- udp_header_t *udp = (udp_header_t *) (ip4 + 1);
- udp->src_port = bibe->out_port;
-
- //UDP checksum is optional over IPv4
- if (proto == IP_PROTOCOL_UDP)
- {
- udp->checksum = 0;
- }
- else
- {
- tcp_header_t *tcp = (tcp_header_t *) (ip4 + 1);
- csum = ip_csum_sub_even (tcp->checksum, old_saddr.as_u64[0]);
- csum = ip_csum_sub_even (csum, old_saddr.as_u64[1]);
- csum = ip_csum_sub_even (csum, old_daddr.as_u64[0]);
- csum = ip_csum_sub_even (csum, old_daddr.as_u64[1]);
- csum = ip_csum_add_even (csum, ip4->dst_address.as_u32);
- csum = ip_csum_add_even (csum, ip4->src_address.as_u32);
- csum = ip_csum_sub_even (csum, sport);
- csum = ip_csum_add_even (csum, udp->src_port);
- mss_clamping (nm->sm->mss_clamping, tcp, &csum);
- tcp->checksum = ip_csum_fold (csum);
-
- nat64_tcp_session_set_state (ste, tcp, 1);
- }
- }
-
- nat64_session_reset_timeout (ste, ctx->vm);
-
- return 0;
-}
-
-static int
-nat64_in2out_icmp_set_cb (ip6_header_t * ip6, ip4_header_t * ip4, void *arg)
-{
- nat64_main_t *nm = &nat64_main;
- nat64_in2out_set_ctx_t *ctx = arg;
- nat64_db_bib_entry_t *bibe;
- nat64_db_st_entry_t *ste;
- ip46_address_t saddr, daddr;
- u32 sw_if_index, fib_index;
- icmp46_header_t *icmp = ip6_next_header (ip6);
- nat64_db_t *db = &nm->db[ctx->thread_index];
-
- sw_if_index = vnet_buffer (ctx->b)->sw_if_index[VLIB_RX];
- fib_index =
- fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP6, sw_if_index);
-
- saddr.as_u64[0] = ip6->src_address.as_u64[0];
- saddr.as_u64[1] = ip6->src_address.as_u64[1];
- daddr.as_u64[0] = ip6->dst_address.as_u64[0];
- daddr.as_u64[1] = ip6->dst_address.as_u64[1];
-
- if (icmp->type == ICMP4_echo_request || icmp->type == ICMP4_echo_reply)
- {
- u16 in_id = ((u16 *) (icmp))[2];
- ste =
- nat64_db_st_entry_find (db, &saddr, &daddr, in_id, 0,
- IP_PROTOCOL_ICMP, fib_index, 1);
-
- if (ste)
- {
- bibe =
- nat64_db_bib_entry_by_index (db, IP_PROTOCOL_ICMP,
- ste->bibe_index);
- if (!bibe)
- return -1;
- }
- else
- {
- bibe =
- nat64_db_bib_entry_find (db, &saddr, in_id,
- IP_PROTOCOL_ICMP, fib_index, 1);
-
- if (!bibe)
- {
- u16 out_id;
- ip4_address_t out_addr;
- if (nat64_alloc_out_addr_and_port
- (fib_index, NAT_PROTOCOL_ICMP, &out_addr, &out_id,
- ctx->thread_index))
- return -1;
-
- bibe =
- nat64_db_bib_entry_create (ctx->thread_index, db,
- &ip6->src_address, &out_addr,
- in_id, out_id, fib_index,
- IP_PROTOCOL_ICMP, 0);
- if (!bibe)
- return -1;
-
- vlib_set_simple_counter (&nm->total_bibs, ctx->thread_index, 0,
- db->bib.bib_entries_num);
- }
-
- nat64_extract_ip4 (&ip6->dst_address, &daddr.ip4, fib_index);
- ste =
- nat64_db_st_entry_create (ctx->thread_index, db, bibe,
- &ip6->dst_address, &daddr.ip4, 0);
- if (!ste)
- return -1;
-
- vlib_set_simple_counter (&nm->total_sessions, ctx->thread_index, 0,
- db->st.st_entries_num);
- }
-
- nat64_session_reset_timeout (ste, ctx->vm);
-
- ip4->src_address.as_u32 = bibe->out_addr.as_u32;
- ((u16 *) (icmp))[2] = bibe->out_port;
-
- ip4->dst_address.as_u32 = ste->out_r_addr.as_u32;
- }
- else
- {
- if (!vec_len (nm->addr_pool))
- return -1;
-
- ip4->src_address.as_u32 = nm->addr_pool[0].addr.as_u32;
- nat64_extract_ip4 (&ip6->dst_address, &ip4->dst_address, fib_index);
- }
-
- return 0;
-}
-
-static int
-nat64_in2out_inner_icmp_set_cb (ip6_header_t * ip6, ip4_header_t * ip4,
- void *arg)
-{
- nat64_main_t *nm = &nat64_main;
- nat64_in2out_set_ctx_t *ctx = arg;
- nat64_db_st_entry_t *ste;
- nat64_db_bib_entry_t *bibe;
- ip46_address_t saddr, daddr;
- u32 sw_if_index, fib_index;
- u8 proto = ip6->protocol;
- nat64_db_t *db = &nm->db[ctx->thread_index];
-
- sw_if_index = vnet_buffer (ctx->b)->sw_if_index[VLIB_RX];
- fib_index =
- fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP6, sw_if_index);
-
- saddr.as_u64[0] = ip6->src_address.as_u64[0];
- saddr.as_u64[1] = ip6->src_address.as_u64[1];
- daddr.as_u64[0] = ip6->dst_address.as_u64[0];
- daddr.as_u64[1] = ip6->dst_address.as_u64[1];
-
- if (proto == IP_PROTOCOL_ICMP6)
- {
- icmp46_header_t *icmp = ip6_next_header (ip6);
- u16 in_id = ((u16 *) (icmp))[2];
- proto = IP_PROTOCOL_ICMP;
-
- if (!
- (icmp->type == ICMP4_echo_request
- || icmp->type == ICMP4_echo_reply))
- return -1;
-
- ste =
- nat64_db_st_entry_find (db, &daddr, &saddr, in_id, 0, proto,
- fib_index, 1);
- if (!ste)
- return -1;
-
- bibe = nat64_db_bib_entry_by_index (db, proto, ste->bibe_index);
- if (!bibe)
- return -1;
-
- ip4->dst_address.as_u32 = bibe->out_addr.as_u32;
- ((u16 *) (icmp))[2] = bibe->out_port;
- ip4->src_address.as_u32 = ste->out_r_addr.as_u32;
- }
- else
- {
- udp_header_t *udp = ip6_next_header (ip6);
- tcp_header_t *tcp = ip6_next_header (ip6);
- u16 *checksum;
- ip_csum_t csum;
-
- u16 sport = udp->src_port;
- u16 dport = udp->dst_port;
-
- ste =
- nat64_db_st_entry_find (db, &daddr, &saddr, dport, sport, proto,
- fib_index, 1);
- if (!ste)
- return -1;
-
- bibe = nat64_db_bib_entry_by_index (db, proto, ste->bibe_index);
- if (!bibe)
- return -1;
-
- ip4->dst_address.as_u32 = bibe->out_addr.as_u32;
- udp->dst_port = bibe->out_port;
- ip4->src_address.as_u32 = ste->out_r_addr.as_u32;
-
- if (proto == IP_PROTOCOL_TCP)
- checksum = &tcp->checksum;
- else
- checksum = &udp->checksum;
- csum = ip_csum_sub_even (*checksum, dport);
- csum = ip_csum_add_even (csum, udp->dst_port);
- *checksum = ip_csum_fold (csum);
- }
-
- return 0;
-}
-
-typedef struct unk_proto_st_walk_ctx_t_
-{
- ip6_address_t src_addr;
- ip6_address_t dst_addr;
- ip4_address_t out_addr;
- u32 fib_index;
- u32 thread_index;
- u8 proto;
-} unk_proto_st_walk_ctx_t;
-
-static int
-unk_proto_st_walk (nat64_db_st_entry_t * ste, void *arg)
-{
- nat64_main_t *nm = &nat64_main;
- unk_proto_st_walk_ctx_t *ctx = arg;
- nat64_db_bib_entry_t *bibe;
- ip46_address_t saddr, daddr;
- nat64_db_t *db = &nm->db[ctx->thread_index];
-
- if (ip6_address_is_equal (&ste->in_r_addr, &ctx->dst_addr))
- {
- bibe = nat64_db_bib_entry_by_index (db, ste->proto, ste->bibe_index);
- if (!bibe)
- return -1;
-
- if (ip6_address_is_equal (&bibe->in_addr, &ctx->src_addr)
- && bibe->fib_index == ctx->fib_index)
- {
- clib_memset (&saddr, 0, sizeof (saddr));
- saddr.ip4.as_u32 = bibe->out_addr.as_u32;
- clib_memset (&daddr, 0, sizeof (daddr));
- nat64_extract_ip4 (&ctx->dst_addr, &daddr.ip4, ctx->fib_index);
-
- if (nat64_db_st_entry_find
- (db, &daddr, &saddr, 0, 0, ctx->proto, ctx->fib_index, 0))
- return -1;
-
- ctx->out_addr.as_u32 = bibe->out_addr.as_u32;
- return 1;
- }
- }
-
- return 0;
-}
-
-static int
-nat64_in2out_unk_proto (vlib_main_t * vm, vlib_buffer_t * p, u8 l4_protocol,
- u16 l4_offset, u16 frag_hdr_offset,
- nat64_in2out_set_ctx_t * s_ctx)
-{
- ip6_header_t *ip6;
- ip4_header_t *ip4;
- u16 fragment_id;
- u16 frag_offset;
- u8 frag_more;
-
- ip6 = vlib_buffer_get_current (p);
-
- ip4 = (ip4_header_t *) u8_ptr_add (ip6, l4_offset - sizeof (*ip4));
-
- vlib_buffer_advance (p, l4_offset - sizeof (*ip4));
-
- if (PREDICT_FALSE (frag_hdr_offset))
- {
- //Only the first fragment
- ip6_frag_hdr_t *hdr =
- (ip6_frag_hdr_t *) u8_ptr_add (ip6, frag_hdr_offset);
- fragment_id = frag_id_6to4 (hdr->identification);
- frag_offset = ip6_frag_hdr_offset (hdr);
- frag_more = ip6_frag_hdr_more (hdr);
- }
- else
- {
- fragment_id = 0;
- frag_offset = 0;
- frag_more = 0;
- }
-
- nat64_main_t *nm = &nat64_main;
- nat64_db_bib_entry_t *bibe;
- nat64_db_st_entry_t *ste;
- ip46_address_t saddr, daddr, addr;
- u32 sw_if_index, fib_index;
- int i;
- nat64_db_t *db = &nm->db[s_ctx->thread_index];
-
- sw_if_index = vnet_buffer (s_ctx->b)->sw_if_index[VLIB_RX];
- fib_index =
- fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP6, sw_if_index);
-
- saddr.as_u64[0] = ip6->src_address.as_u64[0];
- saddr.as_u64[1] = ip6->src_address.as_u64[1];
- daddr.as_u64[0] = ip6->dst_address.as_u64[0];
- daddr.as_u64[1] = ip6->dst_address.as_u64[1];
-
- ste =
- nat64_db_st_entry_find (db, &saddr, &daddr, 0, 0, l4_protocol, fib_index,
- 1);
-
- if (ste)
- {
- bibe = nat64_db_bib_entry_by_index (db, l4_protocol, ste->bibe_index);
- if (!bibe)
- return -1;
- }
- else
- {
- bibe =
- nat64_db_bib_entry_find (db, &saddr, 0, l4_protocol, fib_index, 1);
-
- if (!bibe)
- {
- /* Choose same out address as for TCP/UDP session to same dst */
- unk_proto_st_walk_ctx_t ctx = {
- .src_addr.as_u64[0] = ip6->src_address.as_u64[0],
- .src_addr.as_u64[1] = ip6->src_address.as_u64[1],
- .dst_addr.as_u64[0] = ip6->dst_address.as_u64[0],
- .dst_addr.as_u64[1] = ip6->dst_address.as_u64[1],
- .out_addr.as_u32 = 0,
- .fib_index = fib_index,
- .proto = l4_protocol,
- .thread_index = s_ctx->thread_index,
- };
-
- nat64_db_st_walk (db, IP_PROTOCOL_TCP, unk_proto_st_walk, &ctx);
-
- if (!ctx.out_addr.as_u32)
- nat64_db_st_walk (db, IP_PROTOCOL_UDP, unk_proto_st_walk, &ctx);
-
- /* Verify if out address is not already in use for protocol */
- clib_memset (&addr, 0, sizeof (addr));
- addr.ip4.as_u32 = ctx.out_addr.as_u32;
- if (nat64_db_bib_entry_find (db, &addr, 0, l4_protocol, 0, 0))
- ctx.out_addr.as_u32 = 0;
-
- if (!ctx.out_addr.as_u32)
- {
- for (i = 0; i < vec_len (nm->addr_pool); i++)
- {
- addr.ip4.as_u32 = nm->addr_pool[i].addr.as_u32;
- if (!nat64_db_bib_entry_find
- (db, &addr, 0, l4_protocol, 0, 0))
- break;
- }
- }
-
- if (!ctx.out_addr.as_u32)
- return -1;
-
- bibe =
- nat64_db_bib_entry_create (s_ctx->thread_index, db,
- &ip6->src_address, &ctx.out_addr,
- 0, 0, fib_index, l4_protocol, 0);
- if (!bibe)
- return -1;
-
- vlib_set_simple_counter (&nm->total_bibs, s_ctx->thread_index, 0,
- db->bib.bib_entries_num);
- }
-
- nat64_extract_ip4 (&ip6->dst_address, &daddr.ip4, fib_index);
- ste =
- nat64_db_st_entry_create (s_ctx->thread_index, db, bibe,
- &ip6->dst_address, &daddr.ip4, 0);
- if (!ste)
- return -1;
-
- vlib_set_simple_counter (&nm->total_sessions, s_ctx->thread_index, 0,
- db->st.st_entries_num);
- }
-
- nat64_session_reset_timeout (ste, s_ctx->vm);
-
- ip4->src_address.as_u32 = bibe->out_addr.as_u32;
- ip4->dst_address.as_u32 = ste->out_r_addr.as_u32;
-
- ip4->ip_version_and_header_length =
- IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS;
- ip4->tos = ip6_translate_tos (ip6->ip_version_traffic_class_and_flow_label);
- ip4->length = u16_net_add (ip6->payload_length,
- sizeof (*ip4) + sizeof (*ip6) - l4_offset);
- ip4->fragment_id = fragment_id;
- ip4->flags_and_fragment_offset =
- clib_host_to_net_u16 (frag_offset |
- (frag_more ? IP4_HEADER_FLAG_MORE_FRAGMENTS : 0));
- ip4->ttl = ip6->hop_limit;
- ip4->protocol = l4_protocol;
- ip4->checksum = ip4_header_checksum (ip4);
-
- return 0;
-}
-
-static int
-nat64_in2out_tcp_udp_hairpinning (vlib_main_t * vm, vlib_buffer_t * b,
- ip6_header_t * ip6, u32 l4_offset,
- u32 thread_index)
-{
- nat64_main_t *nm = &nat64_main;
- nat64_db_bib_entry_t *bibe;
- nat64_db_st_entry_t *ste;
- ip46_address_t saddr, daddr;
- u32 sw_if_index, fib_index;
- udp_header_t *udp = (udp_header_t *) u8_ptr_add (ip6, l4_offset);
- tcp_header_t *tcp = (tcp_header_t *) u8_ptr_add (ip6, l4_offset);
- u8 proto = vnet_buffer (b)->ip.reass.ip_proto;
- u16 sport = vnet_buffer (b)->ip.reass.l4_src_port;
- u16 dport = vnet_buffer (b)->ip.reass.l4_dst_port;
- u16 *checksum = NULL;
- ip_csum_t csum = 0;
- nat64_db_t *db = &nm->db[thread_index];
-
- sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
- fib_index =
- fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP6, sw_if_index);
-
- saddr.as_u64[0] = ip6->src_address.as_u64[0];
- saddr.as_u64[1] = ip6->src_address.as_u64[1];
- daddr.as_u64[0] = ip6->dst_address.as_u64[0];
- daddr.as_u64[1] = ip6->dst_address.as_u64[1];
-
- if (!vnet_buffer (b)->ip.reass.is_non_first_fragment)
- {
- if (proto == IP_PROTOCOL_UDP)
- checksum = &udp->checksum;
- else
- checksum = &tcp->checksum;
- csum = ip_csum_sub_even (*checksum, ip6->src_address.as_u64[0]);
- csum = ip_csum_sub_even (csum, ip6->src_address.as_u64[1]);
- csum = ip_csum_sub_even (csum, ip6->dst_address.as_u64[0]);
- csum = ip_csum_sub_even (csum, ip6->dst_address.as_u64[1]);
- }
-
- ste =
- nat64_db_st_entry_find (db, &saddr, &daddr, sport, dport, proto,
- fib_index, 1);
-
- if (ste)
- {
- bibe = nat64_db_bib_entry_by_index (db, proto, ste->bibe_index);
- if (!bibe)
- return -1;
- }
- else
- {
- bibe = nat64_db_bib_entry_find (db, &saddr, sport, proto, fib_index, 1);
-
- if (!bibe)
- {
- u16 out_port;
- ip4_address_t out_addr;
- if (nat64_alloc_out_addr_and_port
- (fib_index, ip_proto_to_nat_proto (proto), &out_addr,
- &out_port, thread_index))
- return -1;
-
- bibe =
- nat64_db_bib_entry_create (thread_index, db, &ip6->src_address,
- &out_addr, sport, out_port, fib_index,
- proto, 0);
- if (!bibe)
- return -1;
-
- vlib_set_simple_counter (&nm->total_bibs, thread_index, 0,
- db->bib.bib_entries_num);
- }
-
- nat64_extract_ip4 (&ip6->dst_address, &daddr.ip4, fib_index);
- ste =
- nat64_db_st_entry_create (thread_index, db, bibe, &ip6->dst_address,
- &daddr.ip4, dport);
- if (!ste)
- return -1;
-
- vlib_set_simple_counter (&nm->total_sessions, thread_index, 0,
- db->st.st_entries_num);
- }
-
- if (proto == IP_PROTOCOL_TCP)
- nat64_tcp_session_set_state (ste, tcp, 1);
-
- nat64_session_reset_timeout (ste, vm);
-
- if (!vnet_buffer (b)->ip.reass.is_non_first_fragment)
- {
- udp->src_port = bibe->out_port;
- }
-
- nat64_compose_ip6 (&ip6->src_address, &bibe->out_addr, fib_index);
-
- clib_memset (&daddr, 0, sizeof (daddr));
- daddr.ip4.as_u32 = ste->out_r_addr.as_u32;
-
- bibe = 0;
- /* *INDENT-OFF* */
- vec_foreach (db, nm->db)
- {
- bibe = nat64_db_bib_entry_find (db, &daddr, dport, proto, 0, 0);
-
- if (bibe)
- break;
- }
- /* *INDENT-ON* */
-
- if (!bibe)
- return -1;
-
- ip6->dst_address.as_u64[0] = bibe->in_addr.as_u64[0];
- ip6->dst_address.as_u64[1] = bibe->in_addr.as_u64[1];
-
- if (!vnet_buffer (b)->ip.reass.is_non_first_fragment)
- {
- csum = ip_csum_add_even (csum, ip6->src_address.as_u64[0]);
- csum = ip_csum_add_even (csum, ip6->src_address.as_u64[1]);
- csum = ip_csum_add_even (csum, ip6->dst_address.as_u64[0]);
- csum = ip_csum_add_even (csum, ip6->dst_address.as_u64[1]);
- csum = ip_csum_sub_even (csum, sport);
- csum = ip_csum_sub_even (csum, dport);
- udp->dst_port = bibe->in_port;
- csum = ip_csum_add_even (csum, udp->src_port);
- csum = ip_csum_add_even (csum, udp->dst_port);
- *checksum = ip_csum_fold (csum);
- }
-
- return 0;
-}
-
-static int
-nat64_in2out_icmp_hairpinning (vlib_main_t * vm, vlib_buffer_t * b,
- ip6_header_t * ip6, u32 thread_index)
-{
- nat64_main_t *nm = &nat64_main;
- nat64_db_bib_entry_t *bibe;
- nat64_db_st_entry_t *ste;
- icmp46_header_t *icmp = ip6_next_header (ip6);
- ip6_header_t *inner_ip6;
- ip46_address_t saddr, daddr;
- u32 sw_if_index, fib_index;
- u8 proto;
- udp_header_t *udp;
- tcp_header_t *tcp;
- u16 *checksum, sport, dport;
- ip_csum_t csum;
- nat64_db_t *db = &nm->db[thread_index];
-
- if (icmp->type == ICMP6_echo_request || icmp->type == ICMP6_echo_reply)
- return -1;
-
- inner_ip6 = (ip6_header_t *) u8_ptr_add (icmp, 8);
-
- proto = inner_ip6->protocol;
-
- if (proto == IP_PROTOCOL_ICMP6)
- return -1;
-
- sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
- fib_index =
- fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP6, sw_if_index);
-
- saddr.as_u64[0] = inner_ip6->src_address.as_u64[0];
- saddr.as_u64[1] = inner_ip6->src_address.as_u64[1];
- daddr.as_u64[0] = inner_ip6->dst_address.as_u64[0];
- daddr.as_u64[1] = inner_ip6->dst_address.as_u64[1];
-
- udp = ip6_next_header (inner_ip6);
- tcp = ip6_next_header (inner_ip6);
-
- sport = udp->src_port;
- dport = udp->dst_port;
-
- if (proto == IP_PROTOCOL_UDP)
- checksum = &udp->checksum;
- else
- checksum = &tcp->checksum;
-
- csum = ip_csum_sub_even (*checksum, inner_ip6->src_address.as_u64[0]);
- csum = ip_csum_sub_even (csum, inner_ip6->src_address.as_u64[1]);
- csum = ip_csum_sub_even (csum, inner_ip6->dst_address.as_u64[0]);
- csum = ip_csum_sub_even (csum, inner_ip6->dst_address.as_u64[1]);
- csum = ip_csum_sub_even (csum, sport);
- csum = ip_csum_sub_even (csum, dport);
-
- ste =
- nat64_db_st_entry_find (db, &daddr, &saddr, dport, sport, proto,
- fib_index, 1);
- if (!ste)
- return -1;
-
- bibe = nat64_db_bib_entry_by_index (db, proto, ste->bibe_index);
- if (!bibe)
- return -1;
-
- dport = udp->dst_port = bibe->out_port;
- nat64_compose_ip6 (&inner_ip6->dst_address, &bibe->out_addr, fib_index);
-
- clib_memset (&saddr, 0, sizeof (saddr));
- clib_memset (&daddr, 0, sizeof (daddr));
- saddr.ip4.as_u32 = ste->out_r_addr.as_u32;
- daddr.ip4.as_u32 = bibe->out_addr.as_u32;
-
- ste = 0;
- /* *INDENT-OFF* */
- vec_foreach (db, nm->db)
- {
- ste = nat64_db_st_entry_find (db, &saddr, &daddr, sport, dport, proto,
- 0, 0);
-
- if (ste)
- break;
- }
- /* *INDENT-ON* */
-
- if (!ste)
- return -1;
-
- bibe = nat64_db_bib_entry_by_index (db, proto, ste->bibe_index);
- if (!bibe)
- return -1;
-
- inner_ip6->src_address.as_u64[0] = bibe->in_addr.as_u64[0];
- inner_ip6->src_address.as_u64[1] = bibe->in_addr.as_u64[1];
- udp->src_port = bibe->in_port;
-
- csum = ip_csum_add_even (csum, inner_ip6->src_address.as_u64[0]);
- csum = ip_csum_add_even (csum, inner_ip6->src_address.as_u64[1]);
- csum = ip_csum_add_even (csum, inner_ip6->dst_address.as_u64[0]);
- csum = ip_csum_add_even (csum, inner_ip6->dst_address.as_u64[1]);
- csum = ip_csum_add_even (csum, udp->src_port);
- csum = ip_csum_add_even (csum, udp->dst_port);
- *checksum = ip_csum_fold (csum);
-
- if (!vec_len (nm->addr_pool))
- return -1;
-
- nat64_compose_ip6 (&ip6->src_address, &nm->addr_pool[0].addr, fib_index);
- ip6->dst_address.as_u64[0] = inner_ip6->src_address.as_u64[0];
- ip6->dst_address.as_u64[1] = inner_ip6->src_address.as_u64[1];
-
- icmp->checksum = 0;
- csum = ip_csum_with_carry (0, ip6->payload_length);
- csum = ip_csum_with_carry (csum, clib_host_to_net_u16 (ip6->protocol));
- csum = ip_csum_with_carry (csum, ip6->src_address.as_u64[0]);
- csum = ip_csum_with_carry (csum, ip6->src_address.as_u64[1]);
- csum = ip_csum_with_carry (csum, ip6->dst_address.as_u64[0]);
- csum = ip_csum_with_carry (csum, ip6->dst_address.as_u64[1]);
- csum =
- ip_incremental_checksum (csum, icmp,
- clib_net_to_host_u16 (ip6->payload_length));
- icmp->checksum = ~ip_csum_fold (csum);
-
- return 0;
-}
-
-static int
-nat64_in2out_unk_proto_hairpinning (vlib_main_t * vm, vlib_buffer_t * b,
- ip6_header_t * ip6, u32 thread_index)
-{
- nat64_main_t *nm = &nat64_main;
- nat64_db_bib_entry_t *bibe;
- nat64_db_st_entry_t *ste;
- ip46_address_t saddr, daddr, addr;
- u32 sw_if_index, fib_index;
- u8 proto = ip6->protocol;
- int i;
- nat64_db_t *db = &nm->db[thread_index];
-
- sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
- fib_index =
- fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP6, sw_if_index);
-
- saddr.as_u64[0] = ip6->src_address.as_u64[0];
- saddr.as_u64[1] = ip6->src_address.as_u64[1];
- daddr.as_u64[0] = ip6->dst_address.as_u64[0];
- daddr.as_u64[1] = ip6->dst_address.as_u64[1];
-
- ste =
- nat64_db_st_entry_find (db, &saddr, &daddr, 0, 0, proto, fib_index, 1);
-
- if (ste)
- {
- bibe = nat64_db_bib_entry_by_index (db, proto, ste->bibe_index);
- if (!bibe)
- return -1;
- }
- else
- {
- bibe = nat64_db_bib_entry_find (db, &saddr, 0, proto, fib_index, 1);
-
- if (!bibe)
- {
- /* Choose same out address as for TCP/UDP session to same dst */
- unk_proto_st_walk_ctx_t ctx = {
- .src_addr.as_u64[0] = ip6->src_address.as_u64[0],
- .src_addr.as_u64[1] = ip6->src_address.as_u64[1],
- .dst_addr.as_u64[0] = ip6->dst_address.as_u64[0],
- .dst_addr.as_u64[1] = ip6->dst_address.as_u64[1],
- .out_addr.as_u32 = 0,
- .fib_index = fib_index,
- .proto = proto,
- .thread_index = thread_index,
- };
-
- nat64_db_st_walk (db, IP_PROTOCOL_TCP, unk_proto_st_walk, &ctx);
-
- if (!ctx.out_addr.as_u32)
- nat64_db_st_walk (db, IP_PROTOCOL_UDP, unk_proto_st_walk, &ctx);
-
- /* Verify if out address is not already in use for protocol */
- clib_memset (&addr, 0, sizeof (addr));
- addr.ip4.as_u32 = ctx.out_addr.as_u32;
- if (nat64_db_bib_entry_find (db, &addr, 0, proto, 0, 0))
- ctx.out_addr.as_u32 = 0;
-
- if (!ctx.out_addr.as_u32)
- {
- for (i = 0; i < vec_len (nm->addr_pool); i++)
- {
- addr.ip4.as_u32 = nm->addr_pool[i].addr.as_u32;
- if (!nat64_db_bib_entry_find (db, &addr, 0, proto, 0, 0))
- break;
- }
- }
-
- if (!ctx.out_addr.as_u32)
- return -1;
-
- bibe =
- nat64_db_bib_entry_create (thread_index, db, &ip6->src_address,
- &ctx.out_addr, 0, 0, fib_index, proto,
- 0);
- if (!bibe)
- return -1;
-
- vlib_set_simple_counter (&nm->total_bibs, thread_index, 0,
- db->bib.bib_entries_num);
- }
-
- nat64_extract_ip4 (&ip6->dst_address, &daddr.ip4, fib_index);
- ste =
- nat64_db_st_entry_create (thread_index, db, bibe, &ip6->dst_address,
- &daddr.ip4, 0);
- if (!ste)
- return -1;
-
- vlib_set_simple_counter (&nm->total_sessions, thread_index, 0,
- db->st.st_entries_num);
- }
-
- nat64_session_reset_timeout (ste, vm);
-
- nat64_compose_ip6 (&ip6->src_address, &bibe->out_addr, fib_index);
-
- clib_memset (&daddr, 0, sizeof (daddr));
- daddr.ip4.as_u32 = ste->out_r_addr.as_u32;
-
- bibe = 0;
- /* *INDENT-OFF* */
- vec_foreach (db, nm->db)
- {
- bibe = nat64_db_bib_entry_find (db, &daddr, 0, proto, 0, 0);
-
- if (bibe)
- break;
- }
- /* *INDENT-ON* */
-
- if (!bibe)
- return -1;
-
- ip6->dst_address.as_u64[0] = bibe->in_addr.as_u64[0];
- ip6->dst_address.as_u64[1] = bibe->in_addr.as_u64[1];
-
- return 0;
-}
-
-static inline uword
-nat64_in2out_node_fn_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
- vlib_frame_t * frame, u8 is_slow_path)
-{
- u32 n_left_from, *from, *to_next;
- nat64_in2out_next_t next_index;
- u32 thread_index = vm->thread_index;
- nat64_main_t *nm = &nat64_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;
- ip6_header_t *ip60;
- u16 l4_offset0, frag_hdr_offset0;
- u8 l4_protocol0;
- u32 proto0;
- nat64_in2out_set_ctx_t ctx0;
- u32 sw_if_index0;
-
- /* 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);
-
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
-
- ctx0.b = b0;
- ctx0.vm = vm;
- ctx0.thread_index = thread_index;
-
- next0 = NAT64_IN2OUT_NEXT_IP4_LOOKUP;
-
- if (PREDICT_FALSE
- (ip6_parse
- (vm, b0, ip60, b0->current_length, &l4_protocol0, &l4_offset0,
- &frag_hdr_offset0)))
- {
- next0 = NAT64_IN2OUT_NEXT_DROP;
- b0->error = node->errors[NAT64_IN2OUT_ERROR_UNKNOWN];
- goto trace0;
- }
-
- if (nat64_not_translate (sw_if_index0, ip60->dst_address))
- {
- next0 = NAT64_IN2OUT_NEXT_IP6_LOOKUP;
- goto trace0;
- }
-
- proto0 = ip_proto_to_nat_proto (l4_protocol0);
-
- if (is_slow_path)
- {
- if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_OTHER))
- {
- vlib_increment_simple_counter (&nm->counters.in2out.other,
- thread_index, sw_if_index0,
- 1);
- if (is_hairpinning (&ip60->dst_address))
- {
- next0 = NAT64_IN2OUT_NEXT_IP6_LOOKUP;
- if (nat64_in2out_unk_proto_hairpinning
- (vm, b0, ip60, thread_index))
- {
- next0 = NAT64_IN2OUT_NEXT_DROP;
- b0->error =
- node->errors[NAT64_IN2OUT_ERROR_NO_TRANSLATION];
- }
- goto trace0;
- }
-
- if (nat64_in2out_unk_proto
- (vm, b0, l4_protocol0, l4_offset0, frag_hdr_offset0,
- &ctx0))
- {
- next0 = NAT64_IN2OUT_NEXT_DROP;
- b0->error =
- node->errors[NAT64_IN2OUT_ERROR_NO_TRANSLATION];
- goto trace0;
- }
- }
- goto trace0;
- }
- else
- {
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
- {
- next0 = NAT64_IN2OUT_NEXT_SLOWPATH;
- goto trace0;
- }
- }
-
- if (proto0 == NAT_PROTOCOL_ICMP)
- {
- vlib_increment_simple_counter (&nm->counters.in2out.icmp,
- thread_index, sw_if_index0, 1);
- if (is_hairpinning (&ip60->dst_address))
- {
- next0 = NAT64_IN2OUT_NEXT_IP6_LOOKUP;
- if (nat64_in2out_icmp_hairpinning
- (vm, b0, ip60, thread_index))
- {
- next0 = NAT64_IN2OUT_NEXT_DROP;
- b0->error =
- node->errors[NAT64_IN2OUT_ERROR_NO_TRANSLATION];
- }
- goto trace0;
- }
-
- if (icmp6_to_icmp
- (vm, b0, nat64_in2out_icmp_set_cb, &ctx0,
- nat64_in2out_inner_icmp_set_cb, &ctx0))
- {
- next0 = NAT64_IN2OUT_NEXT_DROP;
- b0->error = node->errors[NAT64_IN2OUT_ERROR_NO_TRANSLATION];
- goto trace0;
- }
- }
- else if (proto0 == NAT_PROTOCOL_TCP || proto0 == NAT_PROTOCOL_UDP)
- {
- if (proto0 == NAT_PROTOCOL_TCP)
- vlib_increment_simple_counter (&nm->counters.in2out.tcp,
- thread_index, sw_if_index0, 1);
- else
- vlib_increment_simple_counter (&nm->counters.in2out.udp,
- thread_index, sw_if_index0, 1);
-
- if (is_hairpinning (&ip60->dst_address))
- {
- next0 = NAT64_IN2OUT_NEXT_IP6_LOOKUP;
- if (nat64_in2out_tcp_udp_hairpinning
- (vm, b0, ip60, l4_offset0, thread_index))
- {
- next0 = NAT64_IN2OUT_NEXT_DROP;
- b0->error =
- node->errors[NAT64_IN2OUT_ERROR_NO_TRANSLATION];
- }
- goto trace0;
- }
-
- if (nat64_in2out_tcp_udp
- (vm, b0, l4_offset0, frag_hdr_offset0, &ctx0))
- {
- next0 = NAT64_IN2OUT_NEXT_DROP;
- b0->error = node->errors[NAT64_IN2OUT_ERROR_NO_TRANSLATION];
- goto trace0;
- }
- }
-
- trace0:
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat64_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;
- t->is_slow_path = is_slow_path;
- }
-
- if (next0 == NAT64_IN2OUT_NEXT_DROP)
- {
- vlib_increment_simple_counter (&nm->counters.in2out.drops,
- thread_index, sw_if_index0, 1);
- }
-
-
- /* 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;
-}
-
-VLIB_NODE_FN (nat64_in2out_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return nat64_in2out_node_fn_inline (vm, node, frame, 0);
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (nat64_in2out_node) = {
- .name = "nat64-in2out",
- .vector_size = sizeof (u32),
- .format_trace = format_nat64_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN (nat64_in2out_error_strings),
- .error_strings = nat64_in2out_error_strings,
- .n_next_nodes = NAT64_IN2OUT_N_NEXT,
- /* edit / add dispositions here */
- .next_nodes = {
- [NAT64_IN2OUT_NEXT_DROP] = "error-drop",
- [NAT64_IN2OUT_NEXT_IP4_LOOKUP] = "ip4-lookup",
- [NAT64_IN2OUT_NEXT_IP6_LOOKUP] = "ip6-lookup",
- [NAT64_IN2OUT_NEXT_SLOWPATH] = "nat64-in2out-slowpath",
- },
-};
-/* *INDENT-ON* */
-
-VLIB_NODE_FN (nat64_in2out_slowpath_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- return nat64_in2out_node_fn_inline (vm, node, frame, 1);
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (nat64_in2out_slowpath_node) = {
- .name = "nat64-in2out-slowpath",
- .vector_size = sizeof (u32),
- .format_trace = format_nat64_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN (nat64_in2out_error_strings),
- .error_strings = nat64_in2out_error_strings,
- .n_next_nodes = NAT64_IN2OUT_N_NEXT,
- /* edit / add dispositions here */
- .next_nodes = {
- [NAT64_IN2OUT_NEXT_DROP] = "error-drop",
- [NAT64_IN2OUT_NEXT_IP4_LOOKUP] = "ip4-lookup",
- [NAT64_IN2OUT_NEXT_IP6_LOOKUP] = "ip6-lookup",
- [NAT64_IN2OUT_NEXT_SLOWPATH] = "nat64-in2out-slowpath",
- },
-};
-/* *INDENT-ON* */
-
-typedef struct nat64_in2out_frag_set_ctx_t_
-{
- vlib_main_t *vm;
- u32 sess_index;
- u32 thread_index;
- u16 l4_offset;
- u8 proto;
- u8 first_frag;
-} nat64_in2out_frag_set_ctx_t;
-
-
-#define foreach_nat64_in2out_handoff_error \
-_(CONGESTION_DROP, "congestion drop") \
-_(SAME_WORKER, "same worker") \
-_(DO_HANDOFF, "do handoff")
-
-typedef enum
-{
-#define _(sym,str) NAT64_IN2OUT_HANDOFF_ERROR_##sym,
- foreach_nat64_in2out_handoff_error
-#undef _
- NAT64_IN2OUT_HANDOFF_N_ERROR,
-} nat64_in2out_handoff_error_t;
-
-static char *nat64_in2out_handoff_error_strings[] = {
-#define _(sym,string) string,
- foreach_nat64_in2out_handoff_error
-#undef _
-};
-
-typedef struct
-{
- u32 next_worker_index;
-} nat64_in2out_handoff_trace_t;
-
-static u8 *
-format_nat64_in2out_handoff_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 *);
- nat64_in2out_handoff_trace_t *t =
- va_arg (*args, nat64_in2out_handoff_trace_t *);
-
- s =
- format (s, "NAT64-IN2OUT-HANDOFF: next-worker %d", t->next_worker_index);
-
- return s;
-}
-
-VLIB_NODE_FN (nat64_in2out_handoff_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- nat64_main_t *nm = &nat64_main;
- vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
- u32 n_enq, n_left_from, *from;
- u16 thread_indices[VLIB_FRAME_SIZE], *ti;
- u32 fq_index;
- u32 thread_index = vm->thread_index;
- u32 do_handoff = 0, same_worker = 0;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- vlib_get_buffers (vm, from, bufs, n_left_from);
-
- b = bufs;
- ti = thread_indices;
-
- fq_index = nm->fq_in2out_index;
-
- while (n_left_from > 0)
- {
- ip6_header_t *ip0;
-
- ip0 = vlib_buffer_get_current (b[0]);
- ti[0] = nat64_get_worker_in2out (&ip0->src_address);
-
- if (ti[0] != thread_index)
- do_handoff++;
- else
- same_worker++;
-
- if (PREDICT_FALSE
- ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat64_in2out_handoff_trace_t *t =
- vlib_add_trace (vm, node, b[0], sizeof (*t));
- t->next_worker_index = ti[0];
- }
-
- n_left_from -= 1;
- ti += 1;
- b += 1;
- }
-
- n_enq =
- vlib_buffer_enqueue_to_thread (vm, fq_index, from, thread_indices,
- frame->n_vectors, 1);
-
- if (n_enq < frame->n_vectors)
- vlib_node_increment_counter (vm, node->node_index,
- NAT64_IN2OUT_HANDOFF_ERROR_CONGESTION_DROP,
- frame->n_vectors - n_enq);
- vlib_node_increment_counter (vm, node->node_index,
- NAT64_IN2OUT_HANDOFF_ERROR_SAME_WORKER,
- same_worker);
- vlib_node_increment_counter (vm, node->node_index,
- NAT64_IN2OUT_HANDOFF_ERROR_DO_HANDOFF,
- do_handoff);
-
- return frame->n_vectors;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (nat64_in2out_handoff_node) = {
- .name = "nat64-in2out-handoff",
- .vector_size = sizeof (u32),
- .format_trace = format_nat64_in2out_handoff_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN(nat64_in2out_handoff_error_strings),
- .error_strings = nat64_in2out_handoff_error_strings,
-
- .n_next_nodes = 1,
-
- .next_nodes = {
- [0] = "error-drop",
- },
-};
-/* *INDENT-ON* */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */