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b1239c48871a3ff3ab6bd6df71d922898a935c4d
vpp/src/plugins/nat/nat64/nat64_in2out.c
Damjan Marion 9e7a0b48fe vlib: pass node runtime to vlib_buffer_enqueue_to_thread() 
Mechanical change for patch following this one...

Type: improvement
Change-Id: Iee12f3a8851f35569e6c039494a94fc36e83d20f
Signed-off-by: Damjan Marion <damarion@cisco.com>
2021-05-14 15:56:44 +00:00

1411 lines
38 KiB
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/*
* Copyright (c) 2020 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 <nat/nat64/nat64.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->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, node, 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:
*/
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