Gitiles
Code Review Sign In
gerrit.nordix.org / fdio / vpp / 615fc61d0937cda001c0ce1682e036e2bb112a74 / . / src / vnet / map / ip4_map_t.c
blob: b63d76bf4f493785f513a2cd5c1fe10105025233 [file] [log] [blame]
/*
* Copyright (c) 2015 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 "map.h"
#include "../ip/ip_frag.h"
#define IP4_MAP_T_DUAL_LOOP 1
typedef enum
{
IP4_MAPT_NEXT_MAPT_TCP_UDP,
IP4_MAPT_NEXT_MAPT_ICMP,
IP4_MAPT_NEXT_MAPT_FRAGMENTED,
IP4_MAPT_NEXT_DROP,
IP4_MAPT_N_NEXT
} ip4_mapt_next_t;
typedef enum
{
IP4_MAPT_ICMP_NEXT_IP6_LOOKUP,
IP4_MAPT_ICMP_NEXT_IP6_FRAG,
IP4_MAPT_ICMP_NEXT_DROP,
IP4_MAPT_ICMP_N_NEXT
} ip4_mapt_icmp_next_t;
typedef enum
{
IP4_MAPT_TCP_UDP_NEXT_IP6_LOOKUP,
IP4_MAPT_TCP_UDP_NEXT_IP6_FRAG,
IP4_MAPT_TCP_UDP_NEXT_DROP,
IP4_MAPT_TCP_UDP_N_NEXT
} ip4_mapt_tcp_udp_next_t;
typedef enum
{
IP4_MAPT_FRAGMENTED_NEXT_IP6_LOOKUP,
IP4_MAPT_FRAGMENTED_NEXT_IP6_FRAG,
IP4_MAPT_FRAGMENTED_NEXT_DROP,
IP4_MAPT_FRAGMENTED_N_NEXT
} ip4_mapt_fragmented_next_t;
//This is used to pass information within the buffer data.
//Buffer structure being too small to contain big structures like this.
/* *INDENT-OFF* */
typedef CLIB_PACKED (struct {
ip6_address_t daddr;
ip6_address_t saddr;
//IPv6 header + Fragmentation header will be here
//sizeof(ip6) + sizeof(ip_frag) - sizeof(ip4)
u8 unused[28];
}) ip4_mapt_pseudo_header_t;
/* *INDENT-ON* */
#define frag_id_4to6(id) (id)
//TODO: Find the right place in memory for this.
/* *INDENT-OFF* */
static u8 icmp_to_icmp6_updater_pointer_table[] =
{ 0, 1, 4, 4, ~0,
~0, ~0, ~0, 7, 6,
~0, ~0, 8, 8, 8,
8, 24, 24, 24, 24
};
/* *INDENT-ON* */
static_always_inline int
ip4_map_fragment_cache (ip4_header_t * ip4, u16 port)
{
u32 *ignore = NULL;
map_ip4_reass_lock ();
map_ip4_reass_t *r =
map_ip4_reass_get (ip4->src_address.as_u32, ip4->dst_address.as_u32,
ip4->fragment_id,
(ip4->protocol ==
IP_PROTOCOL_ICMP) ? IP_PROTOCOL_ICMP6 : ip4->protocol,
&ignore);
if (r)
r->port = port;
map_ip4_reass_unlock ();
return !r;
}
static_always_inline i32
ip4_map_fragment_get_port (ip4_header_t * ip4)
{
u32 *ignore = NULL;
map_ip4_reass_lock ();
map_ip4_reass_t *r =
map_ip4_reass_get (ip4->src_address.as_u32, ip4->dst_address.as_u32,
ip4->fragment_id,
(ip4->protocol ==
IP_PROTOCOL_ICMP) ? IP_PROTOCOL_ICMP6 : ip4->protocol,
&ignore);
i32 ret = r ? r->port : -1;
map_ip4_reass_unlock ();
return ret;
}
/* Statelessly translates an ICMP packet into ICMPv6.
*
* Warning: The checksum will need to be recomputed.
*
*/
static_always_inline int
ip4_icmp_to_icmp6_in_place (icmp46_header_t * icmp, u32 icmp_len,
i32 * receiver_port, ip4_header_t ** inner_ip4)
{
*inner_ip4 = NULL;
switch (icmp->type)
{
case ICMP4_echo_reply:
*receiver_port = ((u16 *) icmp)[2];
icmp->type = ICMP6_echo_reply;
break;
case ICMP4_echo_request:
*receiver_port = ((u16 *) icmp)[2];
icmp->type = ICMP6_echo_request;
break;
case ICMP4_destination_unreachable:
*inner_ip4 = (ip4_header_t *) (((u8 *) icmp) + 8);
*receiver_port = ip4_get_port (*inner_ip4, MAP_SENDER, icmp_len - 8);
switch (icmp->code)
{
case ICMP4_destination_unreachable_destination_unreachable_net: //0
case ICMP4_destination_unreachable_destination_unreachable_host: //1
icmp->type = ICMP6_destination_unreachable;
icmp->code = ICMP6_destination_unreachable_no_route_to_destination;
break;
case ICMP4_destination_unreachable_protocol_unreachable: //2
icmp->type = ICMP6_parameter_problem;
icmp->code = ICMP6_parameter_problem_unrecognized_next_header;
break;
case ICMP4_destination_unreachable_port_unreachable: //3
icmp->type = ICMP6_destination_unreachable;
icmp->code = ICMP6_destination_unreachable_port_unreachable;
break;
case ICMP4_destination_unreachable_fragmentation_needed_and_dont_fragment_set: //4
icmp->type =
ICMP6_packet_too_big;
icmp->code = 0;
{
u32 advertised_mtu = clib_net_to_host_u32 (*((u32 *) (icmp + 1)));
if (advertised_mtu)
advertised_mtu += 20;
else
advertised_mtu = 1000; //FIXME ! (RFC 1191 - plateau value)
//FIXME: = minimum(advertised MTU+20, MTU_of_IPv6_nexthop, (MTU_of_IPv4_nexthop)+20)
*((u32 *) (icmp + 1)) = clib_host_to_net_u32 (advertised_mtu);
}
break;
case ICMP4_destination_unreachable_source_route_failed: //5
case ICMP4_destination_unreachable_destination_network_unknown: //6
case ICMP4_destination_unreachable_destination_host_unknown: //7
case ICMP4_destination_unreachable_source_host_isolated: //8
case ICMP4_destination_unreachable_network_unreachable_for_type_of_service: //11
case ICMP4_destination_unreachable_host_unreachable_for_type_of_service: //12
icmp->type =
ICMP6_destination_unreachable;
icmp->code = ICMP6_destination_unreachable_no_route_to_destination;
break;
case ICMP4_destination_unreachable_network_administratively_prohibited: //9
case ICMP4_destination_unreachable_host_administratively_prohibited: //10
case ICMP4_destination_unreachable_communication_administratively_prohibited: //13
case ICMP4_destination_unreachable_precedence_cutoff_in_effect: //15
icmp->type = ICMP6_destination_unreachable;
icmp->code =
ICMP6_destination_unreachable_destination_administratively_prohibited;
break;
case ICMP4_destination_unreachable_host_precedence_violation: //14
default:
return -1;
}
break;
case ICMP4_time_exceeded: //11
*inner_ip4 = (ip4_header_t *) (((u8 *) icmp) + 8);
*receiver_port = ip4_get_port (*inner_ip4, MAP_SENDER, icmp_len - 8);
icmp->type = ICMP6_time_exceeded;
//icmp->code = icmp->code //unchanged
break;
case ICMP4_parameter_problem:
*inner_ip4 = (ip4_header_t *) (((u8 *) icmp) + 8);
*receiver_port = ip4_get_port (*inner_ip4, MAP_SENDER, icmp_len - 8);
switch (icmp->code)
{
case ICMP4_parameter_problem_pointer_indicates_error:
case ICMP4_parameter_problem_bad_length:
icmp->type = ICMP6_parameter_problem;
icmp->code = ICMP6_parameter_problem_erroneous_header_field;
{
u8 ptr =
icmp_to_icmp6_updater_pointer_table[*((u8 *) (icmp + 1))];
if (ptr == 0xff)
return -1;
*((u32 *) (icmp + 1)) = clib_host_to_net_u32 (ptr);
}
break;
default:
//All other codes cause dropping the packet
return -1;
}
break;
default:
//All other types cause dropping the packet
return -1;
break;
}
return 0;
}
static_always_inline void
_ip4_map_t_icmp (map_domain_t * d, vlib_buffer_t * p, u8 * error)
{
ip4_header_t *ip4, *inner_ip4;
ip6_header_t *ip6, *inner_ip6;
u32 ip_len;
icmp46_header_t *icmp;
i32 recv_port;
ip_csum_t csum;
u16 *inner_L4_checksum = 0;
ip6_frag_hdr_t *inner_frag;
u32 inner_frag_id;
u32 inner_frag_offset;
u8 inner_frag_more;
ip4 = vlib_buffer_get_current (p);
ip_len = clib_net_to_host_u16 (ip4->length);
ASSERT (ip_len <= p->current_length);
icmp = (icmp46_header_t *) (ip4 + 1);
if (ip4_icmp_to_icmp6_in_place (icmp, ip_len - sizeof (*ip4),
&recv_port, &inner_ip4))
{
*error = MAP_ERROR_ICMP;
return;
}
if (recv_port < 0)
{
// In case of 1:1 mapping, we don't care about the port
if (d->ea_bits_len == 0 && d->rules)
{
recv_port = 0;
}
else
{
*error = MAP_ERROR_ICMP;
return;
}
}
if (inner_ip4)
{
//We have 2 headers to translate.
//We need to make some room in the middle of the packet
if (PREDICT_FALSE (ip4_is_fragment (inner_ip4)))
{
//Here it starts getting really tricky
//We will add a fragmentation header in the inner packet
if (!ip4_is_first_fragment (inner_ip4))
{
//For now we do not handle unless it is the first fragment
//Ideally we should handle the case as we are in slow path already
*error = MAP_ERROR_FRAGMENTED;
return;
}
vlib_buffer_advance (p,
-2 * (sizeof (*ip6) - sizeof (*ip4)) -
sizeof (*inner_frag));
ip6 = vlib_buffer_get_current (p);
clib_memcpy (u8_ptr_add (ip6, sizeof (*ip6) - sizeof (*ip4)), ip4,
20 + 8);
ip4 =
(ip4_header_t *) u8_ptr_add (ip6, sizeof (*ip6) - sizeof (*ip4));
icmp = (icmp46_header_t *) (ip4 + 1);
inner_ip6 =
(ip6_header_t *) u8_ptr_add (inner_ip4,
sizeof (*ip4) - sizeof (*ip6) -
sizeof (*inner_frag));
inner_frag =
(ip6_frag_hdr_t *) u8_ptr_add (inner_ip6, sizeof (*inner_ip6));
ip6->payload_length =
u16_net_add (ip4->length,
sizeof (*ip6) - 2 * sizeof (*ip4) +
sizeof (*inner_frag));
inner_frag_id = frag_id_4to6 (inner_ip4->fragment_id);
inner_frag_offset = ip4_get_fragment_offset (inner_ip4);
inner_frag_more =
! !(inner_ip4->flags_and_fragment_offset &
clib_net_to_host_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS));
}
else
{
vlib_buffer_advance (p, -2 * (sizeof (*ip6) - sizeof (*ip4)));
ip6 = vlib_buffer_get_current (p);
clib_memcpy (u8_ptr_add (ip6, sizeof (*ip6) - sizeof (*ip4)), ip4,
20 + 8);
ip4 =
(ip4_header_t *) u8_ptr_add (ip6, sizeof (*ip6) - sizeof (*ip4));
icmp = (icmp46_header_t *) u8_ptr_add (ip4, sizeof (*ip4));
inner_ip6 =
(ip6_header_t *) u8_ptr_add (inner_ip4,
sizeof (*ip4) - sizeof (*ip6));
ip6->payload_length =
u16_net_add (ip4->length, sizeof (*ip6) - 2 * sizeof (*ip4));
inner_frag = NULL;
}
if (PREDICT_TRUE (inner_ip4->protocol == IP_PROTOCOL_TCP))
{
inner_L4_checksum = &((tcp_header_t *) (inner_ip4 + 1))->checksum;
*inner_L4_checksum =
ip_csum_fold (ip_csum_sub_even
(*inner_L4_checksum,
*((u64 *) (&inner_ip4->src_address))));
}
else if (PREDICT_TRUE (inner_ip4->protocol == IP_PROTOCOL_UDP))
{
inner_L4_checksum = &((udp_header_t *) (inner_ip4 + 1))->checksum;
if (!*inner_L4_checksum)
{
//The inner packet was first translated, and therefore came from IPv6.
//As the packet was an IPv6 packet, the UDP checksum can't be NULL
*error = MAP_ERROR_ICMP;
return;
}
*inner_L4_checksum =
ip_csum_fold (ip_csum_sub_even
(*inner_L4_checksum,
*((u64 *) (&inner_ip4->src_address))));
}
else if (inner_ip4->protocol == IP_PROTOCOL_ICMP)
{
//We have an ICMP inside an ICMP
//It needs to be translated, but not for error ICMP messages
icmp46_header_t *inner_icmp = (icmp46_header_t *) (inner_ip4 + 1);
csum = inner_icmp->checksum;
//Only types ICMP4_echo_request and ICMP4_echo_reply are handled by ip4_icmp_to_icmp6_in_place
csum = ip_csum_sub_even (csum, *((u16 *) inner_icmp));
inner_icmp->type = (inner_icmp->type == ICMP4_echo_request) ?
ICMP6_echo_request : ICMP6_echo_reply;
csum = ip_csum_add_even (csum, *((u16 *) inner_icmp));
csum =
ip_csum_add_even (csum, clib_host_to_net_u16 (IP_PROTOCOL_ICMP6));
csum =
ip_csum_add_even (csum, inner_ip4->length - sizeof (*inner_ip4));
inner_icmp->checksum = ip_csum_fold (csum);
inner_L4_checksum = &inner_icmp->checksum;
inner_ip4->protocol = IP_PROTOCOL_ICMP6;
}
else
{
/* To shut up Coverity */
os_panic ();
}
//FIXME: Security check with the port found in the inner packet
csum = *inner_L4_checksum; //Initial checksum of the inner L4 header
//FIXME: Shouldn't we remove ip addresses from there ?
inner_ip6->ip_version_traffic_class_and_flow_label =
clib_host_to_net_u32 ((6 << 28) + (inner_ip4->tos << 20));
inner_ip6->payload_length =
u16_net_add (inner_ip4->length, -sizeof (*inner_ip4));
inner_ip6->hop_limit = inner_ip4->ttl;
inner_ip6->protocol = inner_ip4->protocol;
//Note that the source address is within the domain
//while the destination address is the one outside the domain
ip4_map_t_embedded_address (d, &inner_ip6->dst_address,
&inner_ip4->dst_address);
inner_ip6->src_address.as_u64[0] =
map_get_pfx_net (d, inner_ip4->src_address.as_u32, recv_port);
inner_ip6->src_address.as_u64[1] =
map_get_sfx_net (d, inner_ip4->src_address.as_u32, recv_port);
if (PREDICT_FALSE (inner_frag != NULL))
{
inner_frag->next_hdr = inner_ip6->protocol;
inner_frag->identification = inner_frag_id;
inner_frag->rsv = 0;
inner_frag->fragment_offset_and_more =
ip6_frag_hdr_offset_and_more (inner_frag_offset, inner_frag_more);
inner_ip6->protocol = IP_PROTOCOL_IPV6_FRAGMENTATION;
inner_ip6->payload_length =
clib_host_to_net_u16 (clib_net_to_host_u16
(inner_ip6->payload_length) +
sizeof (*inner_frag));
}
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]);
*inner_L4_checksum = ip_csum_fold (csum);
}
else
{
vlib_buffer_advance (p, sizeof (*ip4) - sizeof (*ip6));
ip6 = vlib_buffer_get_current (p);
ip6->payload_length =
clib_host_to_net_u16 (clib_net_to_host_u16 (ip4->length) -
sizeof (*ip4));
}
//Translate outer IPv6
ip6->ip_version_traffic_class_and_flow_label =
clib_host_to_net_u32 ((6 << 28) + (ip4->tos << 20));
ip6->hop_limit = ip4->ttl;
ip6->protocol = IP_PROTOCOL_ICMP6;
ip4_map_t_embedded_address (d, &ip6->src_address, &ip4->src_address);
ip6->dst_address.as_u64[0] =
map_get_pfx_net (d, ip4->dst_address.as_u32, recv_port);
ip6->dst_address.as_u64[1] =
map_get_sfx_net (d, ip4->dst_address.as_u32, recv_port);
//Truncate when the packet exceeds the minimal IPv6 MTU
if (p->current_length > 1280)
{
ip6->payload_length = clib_host_to_net_u16 (1280 - sizeof (*ip6));
p->current_length = 1280; //Looks too simple to be correct...
}
//TODO: We could do an easy diff-checksum for echo requests/replies
//Recompute ICMP checksum
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);
}
static uword
ip4_map_t_icmp (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
vlib_node_runtime_t *error_node =
vlib_node_get_runtime (vm, ip4_map_t_icmp_node.index);
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
vlib_combined_counter_main_t *cm = map_main.domain_counters;
u32 cpu_index = os_get_cpu_number ();
while (n_left_from > 0)
{
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 pi0;
vlib_buffer_t *p0;
ip4_mapt_icmp_next_t next0;
u8 error0;
map_domain_t *d0;
u16 len0;
next0 = IP4_MAPT_ICMP_NEXT_IP6_LOOKUP;
pi0 = to_next[0] = from[0];
from += 1;
n_left_from -= 1;
to_next += 1;
n_left_to_next -= 1;
error0 = MAP_ERROR_NONE;
p0 = vlib_get_buffer (vm, pi0);
vlib_buffer_advance (p0, sizeof (ip4_mapt_pseudo_header_t)); //The pseudo-header is not used
len0 =
clib_net_to_host_u16 (((ip4_header_t *)
vlib_buffer_get_current (p0))->length);
d0 =
pool_elt_at_index (map_main.domains,
vnet_buffer (p0)->map_t.map_domain_index);
_ip4_map_t_icmp (d0, p0, &error0);
if (vnet_buffer (p0)->map_t.mtu < p0->current_length)
{
vnet_buffer (p0)->ip_frag.header_offset = 0;
vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu;
vnet_buffer (p0)->ip_frag.next_index = IP6_FRAG_NEXT_IP6_LOOKUP;
next0 = IP4_MAPT_ICMP_NEXT_IP6_FRAG;
}
if (PREDICT_TRUE (error0 == MAP_ERROR_NONE))
{
vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_TX,
cpu_index,
vnet_buffer (p0)->map_t.
map_domain_index, 1, len0);
}
else
{
next0 = IP4_MAPT_ICMP_NEXT_DROP;
}
p0->error = error_node->errors[error0];
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next, pi0,
next0);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
return frame->n_vectors;
}
static uword
ip4_map_t_fragmented (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
while (n_left_from > 0)
{
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 pi0;
vlib_buffer_t *p0;
ip4_header_t *ip40;
ip6_header_t *ip60;
ip6_frag_hdr_t *frag0;
ip4_mapt_pseudo_header_t *pheader0;
ip4_mapt_fragmented_next_t next0;
next0 = IP4_MAPT_FRAGMENTED_NEXT_IP6_LOOKUP;
pi0 = to_next[0] = from[0];
from += 1;
n_left_from -= 1;
to_next += 1;
n_left_to_next -= 1;
p0 = vlib_get_buffer (vm, pi0);
//Accessing pseudo header
pheader0 = vlib_buffer_get_current (p0);
vlib_buffer_advance (p0, sizeof (*pheader0));
//Accessing ip4 header
ip40 = vlib_buffer_get_current (p0);
frag0 =
(ip6_frag_hdr_t *) u8_ptr_add (ip40,
sizeof (*ip40) - sizeof (*frag0));
ip60 =
(ip6_header_t *) u8_ptr_add (ip40,
sizeof (*ip40) - sizeof (*frag0) -
sizeof (*ip60));
vlib_buffer_advance (p0,
sizeof (*ip40) - sizeof (*ip60) -
sizeof (*frag0));
//We know that the protocol was one of ICMP, TCP or UDP
//because the first fragment was found and cached
frag0->next_hdr =
(ip40->protocol ==
IP_PROTOCOL_ICMP) ? IP_PROTOCOL_ICMP6 : ip40->protocol;
frag0->identification = frag_id_4to6 (ip40->fragment_id);
frag0->rsv = 0;
frag0->fragment_offset_and_more =
ip6_frag_hdr_offset_and_more (ip4_get_fragment_offset (ip40),
clib_net_to_host_u16
(ip40->flags_and_fragment_offset) &
IP4_HEADER_FLAG_MORE_FRAGMENTS);
ip60->ip_version_traffic_class_and_flow_label =
clib_host_to_net_u32 ((6 << 28) + (ip40->tos << 20));
ip60->payload_length =
clib_host_to_net_u16 (clib_net_to_host_u16 (ip40->length) -
sizeof (*ip40) + sizeof (*frag0));
ip60->hop_limit = ip40->ttl;
ip60->protocol = IP_PROTOCOL_IPV6_FRAGMENTATION;
ip60->dst_address.as_u64[0] = pheader0->daddr.as_u64[0];
ip60->dst_address.as_u64[1] = pheader0->daddr.as_u64[1];
ip60->src_address.as_u64[0] = pheader0->saddr.as_u64[0];
ip60->src_address.as_u64[1] = pheader0->saddr.as_u64[1];
if (vnet_buffer (p0)->map_t.mtu < p0->current_length)
{
vnet_buffer (p0)->ip_frag.header_offset = 0;
vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu;
vnet_buffer (p0)->ip_frag.next_index = IP6_FRAG_NEXT_IP6_LOOKUP;
next0 = IP4_MAPT_FRAGMENTED_NEXT_IP6_FRAG;
}
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next, pi0,
next0);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
return frame->n_vectors;
}
static uword
ip4_map_t_tcp_udp (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
while (n_left_from > 0)
{
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
#ifdef IP4_MAP_T_DUAL_LOOP
while (n_left_from >= 4 && n_left_to_next >= 2)
{
u32 pi0, pi1;
vlib_buffer_t *p0, *p1;
ip4_header_t *ip40, *ip41;
ip6_header_t *ip60, *ip61;
ip_csum_t csum0, csum1;
u16 *checksum0, *checksum1;
ip6_frag_hdr_t *frag0, *frag1;
u32 frag_id0, frag_id1;
ip4_mapt_pseudo_header_t *pheader0, *pheader1;
ip4_mapt_tcp_udp_next_t next0, next1;
pi0 = to_next[0] = from[0];
pi1 = to_next[1] = from[1];
from += 2;
n_left_from -= 2;
to_next += 2;
n_left_to_next -= 2;
next0 = IP4_MAPT_TCP_UDP_NEXT_IP6_LOOKUP;
next1 = IP4_MAPT_TCP_UDP_NEXT_IP6_LOOKUP;
p0 = vlib_get_buffer (vm, pi0);
p1 = vlib_get_buffer (vm, pi1);
//Accessing pseudo header
pheader0 = vlib_buffer_get_current (p0);
pheader1 = vlib_buffer_get_current (p1);
vlib_buffer_advance (p0, sizeof (*pheader0));
vlib_buffer_advance (p1, sizeof (*pheader1));
//Accessing ip4 header
ip40 = vlib_buffer_get_current (p0);
ip41 = vlib_buffer_get_current (p1);
checksum0 =
(u16 *) u8_ptr_add (ip40,
vnet_buffer (p0)->map_t.checksum_offset);
checksum1 =
(u16 *) u8_ptr_add (ip41,
vnet_buffer (p1)->map_t.checksum_offset);
//UDP checksum is optional over IPv4 but mandatory for IPv6
//We do not check udp->length sanity but use our safe computed value instead
if (PREDICT_FALSE
(!*checksum0 && ip40->protocol == IP_PROTOCOL_UDP))
{
u16 udp_len =
clib_host_to_net_u16 (ip40->length) - sizeof (*ip40);
udp_header_t *udp =
(udp_header_t *) u8_ptr_add (ip40, sizeof (*ip40));
ip_csum_t csum;
csum = ip_incremental_checksum (0, udp, udp_len);
csum =
ip_csum_with_carry (csum, clib_host_to_net_u16 (udp_len));
csum =
ip_csum_with_carry (csum,
clib_host_to_net_u16 (IP_PROTOCOL_UDP));
csum =
ip_csum_with_carry (csum, *((u64 *) (&ip40->src_address)));
*checksum0 = ~ip_csum_fold (csum);
}
if (PREDICT_FALSE
(!*checksum1 && ip41->protocol == IP_PROTOCOL_UDP))
{
u16 udp_len =
clib_host_to_net_u16 (ip41->length) - sizeof (*ip40);
udp_header_t *udp =
(udp_header_t *) u8_ptr_add (ip41, sizeof (*ip40));
ip_csum_t csum;
csum = ip_incremental_checksum (0, udp, udp_len);
csum =
ip_csum_with_carry (csum, clib_host_to_net_u16 (udp_len));
csum =
ip_csum_with_carry (csum,
clib_host_to_net_u16 (IP_PROTOCOL_UDP));
csum =
ip_csum_with_carry (csum, *((u64 *) (&ip41->src_address)));
*checksum1 = ~ip_csum_fold (csum);
}
csum0 = ip_csum_sub_even (*checksum0, ip40->src_address.as_u32);
csum1 = ip_csum_sub_even (*checksum1, ip41->src_address.as_u32);
csum0 = ip_csum_sub_even (csum0, ip40->dst_address.as_u32);
csum1 = ip_csum_sub_even (csum1, ip41->dst_address.as_u32);
// Deal with fragmented packets
if (PREDICT_FALSE (ip40->flags_and_fragment_offset &
clib_host_to_net_u16
(IP4_HEADER_FLAG_MORE_FRAGMENTS)))
{
ip60 =
(ip6_header_t *) u8_ptr_add (ip40,
sizeof (*ip40) - sizeof (*ip60) -
sizeof (*frag0));
frag0 =
(ip6_frag_hdr_t *) u8_ptr_add (ip40,
sizeof (*ip40) -
sizeof (*frag0));
frag_id0 = frag_id_4to6 (ip40->fragment_id);
vlib_buffer_advance (p0,
sizeof (*ip40) - sizeof (*ip60) -
sizeof (*frag0));
}
else
{
ip60 =
(ip6_header_t *) (((u8 *) ip40) + sizeof (*ip40) -
sizeof (*ip60));
vlib_buffer_advance (p0, sizeof (*ip40) - sizeof (*ip60));
frag0 = NULL;
}
if (PREDICT_FALSE (ip41->flags_and_fragment_offset &
clib_host_to_net_u16
(IP4_HEADER_FLAG_MORE_FRAGMENTS)))
{
ip61 =
(ip6_header_t *) u8_ptr_add (ip41,
sizeof (*ip40) - sizeof (*ip60) -
sizeof (*frag0));
frag1 =
(ip6_frag_hdr_t *) u8_ptr_add (ip41,
sizeof (*ip40) -
sizeof (*frag0));
frag_id1 = frag_id_4to6 (ip41->fragment_id);
vlib_buffer_advance (p1,
sizeof (*ip40) - sizeof (*ip60) -
sizeof (*frag0));
}
else
{
ip61 =
(ip6_header_t *) (((u8 *) ip41) + sizeof (*ip40) -
sizeof (*ip60));
vlib_buffer_advance (p1, sizeof (*ip40) - sizeof (*ip60));
frag1 = NULL;
}
ip60->ip_version_traffic_class_and_flow_label =
clib_host_to_net_u32 ((6 << 28) + (ip40->tos << 20));
ip61->ip_version_traffic_class_and_flow_label =
clib_host_to_net_u32 ((6 << 28) + (ip41->tos << 20));
ip60->payload_length = u16_net_add (ip40->length, -sizeof (*ip40));
ip61->payload_length = u16_net_add (ip41->length, -sizeof (*ip40));
ip60->hop_limit = ip40->ttl;
ip61->hop_limit = ip41->ttl;
ip60->protocol = ip40->protocol;
ip61->protocol = ip41->protocol;
if (PREDICT_FALSE (frag0 != NULL))
{
frag0->next_hdr = ip60->protocol;
frag0->identification = frag_id0;
frag0->rsv = 0;
frag0->fragment_offset_and_more =
ip6_frag_hdr_offset_and_more (0, 1);
ip60->protocol = IP_PROTOCOL_IPV6_FRAGMENTATION;
ip60->payload_length =
u16_net_add (ip60->payload_length, sizeof (*frag0));
}
if (PREDICT_FALSE (frag1 != NULL))
{
frag1->next_hdr = ip61->protocol;
frag1->identification = frag_id1;
frag1->rsv = 0;
frag1->fragment_offset_and_more =
ip6_frag_hdr_offset_and_more (0, 1);
ip61->protocol = IP_PROTOCOL_IPV6_FRAGMENTATION;
ip61->payload_length =
u16_net_add (ip61->payload_length, sizeof (*frag0));
}
//Finally copying the address
ip60->dst_address.as_u64[0] = pheader0->daddr.as_u64[0];
ip61->dst_address.as_u64[0] = pheader1->daddr.as_u64[0];
ip60->dst_address.as_u64[1] = pheader0->daddr.as_u64[1];
ip61->dst_address.as_u64[1] = pheader1->daddr.as_u64[1];
ip60->src_address.as_u64[0] = pheader0->saddr.as_u64[0];
ip61->src_address.as_u64[0] = pheader1->saddr.as_u64[0];
ip60->src_address.as_u64[1] = pheader0->saddr.as_u64[1];
ip61->src_address.as_u64[1] = pheader1->saddr.as_u64[1];
csum0 = ip_csum_add_even (csum0, ip60->src_address.as_u64[0]);
csum1 = ip_csum_add_even (csum1, ip61->src_address.as_u64[0]);
csum0 = ip_csum_add_even (csum0, ip60->src_address.as_u64[1]);
csum1 = ip_csum_add_even (csum1, ip61->src_address.as_u64[1]);
csum0 = ip_csum_add_even (csum0, ip60->dst_address.as_u64[0]);
csum1 = ip_csum_add_even (csum1, ip61->dst_address.as_u64[0]);
csum0 = ip_csum_add_even (csum0, ip60->dst_address.as_u64[1]);
csum1 = ip_csum_add_even (csum1, ip61->dst_address.as_u64[1]);
*checksum0 = ip_csum_fold (csum0);
*checksum1 = ip_csum_fold (csum1);
if (vnet_buffer (p0)->map_t.mtu < p0->current_length)
{
vnet_buffer (p0)->ip_frag.header_offset = 0;
vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu;
vnet_buffer (p0)->ip_frag.next_index = IP6_FRAG_NEXT_IP6_LOOKUP;
next0 = IP4_MAPT_TCP_UDP_NEXT_IP6_FRAG;
}
if (vnet_buffer (p1)->map_t.mtu < p1->current_length)
{
vnet_buffer (p1)->ip_frag.header_offset = 0;
vnet_buffer (p1)->ip_frag.mtu = vnet_buffer (p1)->map_t.mtu;
vnet_buffer (p1)->ip_frag.next_index = IP6_FRAG_NEXT_IP6_LOOKUP;
next1 = IP4_MAPT_TCP_UDP_NEXT_IP6_FRAG;
}
vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
to_next, n_left_to_next, pi0, pi1,
next0, next1);
}
#endif
while (n_left_from > 0 && n_left_to_next > 0)
{
u32 pi0;
vlib_buffer_t *p0;
ip4_header_t *ip40;
ip6_header_t *ip60;
ip_csum_t csum0;
u16 *checksum0;
ip6_frag_hdr_t *frag0;
u32 frag_id0;
ip4_mapt_pseudo_header_t *pheader0;
ip4_mapt_tcp_udp_next_t next0;
pi0 = to_next[0] = from[0];
from += 1;
n_left_from -= 1;
to_next += 1;
n_left_to_next -= 1;
next0 = IP4_MAPT_TCP_UDP_NEXT_IP6_LOOKUP;
p0 = vlib_get_buffer (vm, pi0);
//Accessing pseudo header
pheader0 = vlib_buffer_get_current (p0);
vlib_buffer_advance (p0, sizeof (*pheader0));
//Accessing ip4 header
ip40 = vlib_buffer_get_current (p0);
checksum0 =
(u16 *) u8_ptr_add (ip40,
vnet_buffer (p0)->map_t.checksum_offset);
//UDP checksum is optional over IPv4 but mandatory for IPv6
//We do not check udp->length sanity but use our safe computed value instead
if (PREDICT_FALSE
(!*checksum0 && ip40->protocol == IP_PROTOCOL_UDP))
{
u16 udp_len =
clib_host_to_net_u16 (ip40->length) - sizeof (*ip40);
udp_header_t *udp =
(udp_header_t *) u8_ptr_add (ip40, sizeof (*ip40));
ip_csum_t csum;
csum = ip_incremental_checksum (0, udp, udp_len);
csum =
ip_csum_with_carry (csum, clib_host_to_net_u16 (udp_len));
csum =
ip_csum_with_carry (csum,
clib_host_to_net_u16 (IP_PROTOCOL_UDP));
csum =
ip_csum_with_carry (csum, *((u64 *) (&ip40->src_address)));
*checksum0 = ~ip_csum_fold (csum);
}
csum0 = ip_csum_sub_even (*checksum0, ip40->src_address.as_u32);
csum0 = ip_csum_sub_even (csum0, ip40->dst_address.as_u32);
// Deal with fragmented packets
if (PREDICT_FALSE (ip40->flags_and_fragment_offset &
clib_host_to_net_u16
(IP4_HEADER_FLAG_MORE_FRAGMENTS)))
{
ip60 =
(ip6_header_t *) u8_ptr_add (ip40,
sizeof (*ip40) - sizeof (*ip60) -
sizeof (*frag0));
frag0 =
(ip6_frag_hdr_t *) u8_ptr_add (ip40,
sizeof (*ip40) -
sizeof (*frag0));
frag_id0 = frag_id_4to6 (ip40->fragment_id);
vlib_buffer_advance (p0,
sizeof (*ip40) - sizeof (*ip60) -
sizeof (*frag0));
}
else
{
ip60 =
(ip6_header_t *) (((u8 *) ip40) + sizeof (*ip40) -
sizeof (*ip60));
vlib_buffer_advance (p0, sizeof (*ip40) - sizeof (*ip60));
frag0 = NULL;
}
ip60->ip_version_traffic_class_and_flow_label =
clib_host_to_net_u32 ((6 << 28) + (ip40->tos << 20));
ip60->payload_length = u16_net_add (ip40->length, -sizeof (*ip40));
ip60->hop_limit = ip40->ttl;
ip60->protocol = ip40->protocol;
if (PREDICT_FALSE (frag0 != NULL))
{
frag0->next_hdr = ip60->protocol;
frag0->identification = frag_id0;
frag0->rsv = 0;
frag0->fragment_offset_and_more =
ip6_frag_hdr_offset_and_more (0, 1);
ip60->protocol = IP_PROTOCOL_IPV6_FRAGMENTATION;
ip60->payload_length =
u16_net_add (ip60->payload_length, sizeof (*frag0));
}
//Finally copying the address
ip60->dst_address.as_u64[0] = pheader0->daddr.as_u64[0];
ip60->dst_address.as_u64[1] = pheader0->daddr.as_u64[1];
ip60->src_address.as_u64[0] = pheader0->saddr.as_u64[0];
ip60->src_address.as_u64[1] = pheader0->saddr.as_u64[1];
csum0 = ip_csum_add_even (csum0, ip60->src_address.as_u64[0]);
csum0 = ip_csum_add_even (csum0, ip60->src_address.as_u64[1]);
csum0 = ip_csum_add_even (csum0, ip60->dst_address.as_u64[0]);
csum0 = ip_csum_add_even (csum0, ip60->dst_address.as_u64[1]);
*checksum0 = ip_csum_fold (csum0);
if (vnet_buffer (p0)->map_t.mtu < p0->current_length)
{
//Send to fragmentation node if necessary
vnet_buffer (p0)->ip_frag.header_offset = 0;
vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu;
vnet_buffer (p0)->ip_frag.next_index = IP6_FRAG_NEXT_IP6_LOOKUP;
next0 = IP4_MAPT_TCP_UDP_NEXT_IP6_FRAG;
}
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next, pi0,
next0);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
return frame->n_vectors;
}
static_always_inline void
ip4_map_t_classify (vlib_buffer_t * p0, map_domain_t * d0,
ip4_header_t * ip40, u16 ip4_len0, i32 * dst_port0,
u8 * error0, ip4_mapt_next_t * next0)
{
if (PREDICT_FALSE (ip4_get_fragment_offset (ip40)))
{
*next0 = IP4_MAPT_NEXT_MAPT_FRAGMENTED;
if (d0->ea_bits_len == 0 && d0->rules)
{
*dst_port0 = 0;
}
else
{
*dst_port0 = ip4_map_fragment_get_port (ip40);
*error0 = (*dst_port0 == -1) ? MAP_ERROR_FRAGMENT_MEMORY : *error0;
}
}
else if (PREDICT_TRUE (ip40->protocol == IP_PROTOCOL_TCP))
{
vnet_buffer (p0)->map_t.checksum_offset = 36;
*next0 = IP4_MAPT_NEXT_MAPT_TCP_UDP;
*error0 = ip4_len0 < 40 ? MAP_ERROR_MALFORMED : *error0;
*dst_port0 = (i32) * ((u16 *) u8_ptr_add (ip40, sizeof (*ip40) + 2));
}
else if (PREDICT_TRUE (ip40->protocol == IP_PROTOCOL_UDP))
{
vnet_buffer (p0)->map_t.checksum_offset = 26;
*next0 = IP4_MAPT_NEXT_MAPT_TCP_UDP;
*error0 = ip4_len0 < 28 ? MAP_ERROR_MALFORMED : *error0;
*dst_port0 = (i32) * ((u16 *) u8_ptr_add (ip40, sizeof (*ip40) + 2));
}
else if (ip40->protocol == IP_PROTOCOL_ICMP)
{
*next0 = IP4_MAPT_NEXT_MAPT_ICMP;
if (d0->ea_bits_len == 0 && d0->rules)
*dst_port0 = 0;
else if (((icmp46_header_t *) u8_ptr_add (ip40, sizeof (*ip40)))->code
== ICMP4_echo_reply
|| ((icmp46_header_t *)
u8_ptr_add (ip40,
sizeof (*ip40)))->code == ICMP4_echo_request)
*dst_port0 = (i32) * ((u16 *) u8_ptr_add (ip40, sizeof (*ip40) + 6));
}
else
{
*error0 = MAP_ERROR_BAD_PROTOCOL;
}
}
static uword
ip4_map_t (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
{
u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
vlib_node_runtime_t *error_node =
vlib_node_get_runtime (vm, ip4_map_t_node.index);
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
vlib_combined_counter_main_t *cm = map_main.domain_counters;
u32 cpu_index = os_get_cpu_number ();
while (n_left_from > 0)
{
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
#ifdef IP4_MAP_T_DUAL_LOOP
while (n_left_from >= 4 && n_left_to_next >= 2)
{
u32 pi0, pi1;
vlib_buffer_t *p0, *p1;
ip4_header_t *ip40, *ip41;
map_domain_t *d0, *d1;
ip4_mapt_next_t next0 = 0, next1 = 0;
u16 ip4_len0, ip4_len1;
u8 error0, error1;
i32 dst_port0, dst_port1;
ip4_mapt_pseudo_header_t *pheader0, *pheader1;
pi0 = to_next[0] = from[0];
pi1 = to_next[1] = from[1];
from += 2;
n_left_from -= 2;
to_next += 2;
n_left_to_next -= 2;
error0 = MAP_ERROR_NONE;
error1 = MAP_ERROR_NONE;
p0 = vlib_get_buffer (vm, pi0);
p1 = vlib_get_buffer (vm, pi1);
ip40 = vlib_buffer_get_current (p0);
ip41 = vlib_buffer_get_current (p1);
ip4_len0 = clib_host_to_net_u16 (ip40->length);
ip4_len1 = clib_host_to_net_u16 (ip41->length);
if (PREDICT_FALSE (p0->current_length < ip4_len0 ||
ip40->ip_version_and_header_length != 0x45))
{
error0 = MAP_ERROR_UNKNOWN;
next0 = IP4_MAPT_NEXT_DROP;
}
if (PREDICT_FALSE (p1->current_length < ip4_len1 ||
ip41->ip_version_and_header_length != 0x45))
{
error1 = MAP_ERROR_UNKNOWN;
next1 = IP4_MAPT_NEXT_DROP;
}
vnet_buffer (p0)->map_t.map_domain_index =
vnet_buffer (p0)->ip.adj_index[VLIB_TX];
d0 = ip4_map_get_domain (vnet_buffer (p0)->map_t.map_domain_index);
vnet_buffer (p1)->map_t.map_domain_index =
vnet_buffer (p1)->ip.adj_index[VLIB_TX];
d1 = ip4_map_get_domain (vnet_buffer (p1)->map_t.map_domain_index);
vnet_buffer (p0)->map_t.mtu = d0->mtu ? d0->mtu : ~0;
vnet_buffer (p1)->map_t.mtu = d1->mtu ? d1->mtu : ~0;
dst_port0 = -1;
dst_port1 = -1;
ip4_map_t_classify (p0, d0, ip40, ip4_len0, &dst_port0, &error0,
&next0);
ip4_map_t_classify (p1, d1, ip41, ip4_len1, &dst_port1, &error1,
&next1);
//Add MAP-T pseudo header in front of the packet
vlib_buffer_advance (p0, -sizeof (*pheader0));
vlib_buffer_advance (p1, -sizeof (*pheader1));
pheader0 = vlib_buffer_get_current (p0);
pheader1 = vlib_buffer_get_current (p1);
//Save addresses within the packet
ip4_map_t_embedded_address (d0, &pheader0->saddr,
&ip40->src_address);
ip4_map_t_embedded_address (d1, &pheader1->saddr,
&ip41->src_address);
pheader0->daddr.as_u64[0] =
map_get_pfx_net (d0, ip40->dst_address.as_u32, (u16) dst_port0);
pheader0->daddr.as_u64[1] =
map_get_sfx_net (d0, ip40->dst_address.as_u32, (u16) dst_port0);
pheader1->daddr.as_u64[0] =
map_get_pfx_net (d1, ip41->dst_address.as_u32, (u16) dst_port1);
pheader1->daddr.as_u64[1] =
map_get_sfx_net (d1, ip41->dst_address.as_u32, (u16) dst_port1);
if (PREDICT_FALSE
(ip4_is_first_fragment (ip40) && (dst_port0 != -1)
&& (d0->ea_bits_len != 0 || !d0->rules)
&& ip4_map_fragment_cache (ip40, dst_port0)))
{
error0 = MAP_ERROR_FRAGMENT_MEMORY;
}
if (PREDICT_FALSE
(ip4_is_first_fragment (ip41) && (dst_port1 != -1)
&& (d1->ea_bits_len != 0 || !d1->rules)
&& ip4_map_fragment_cache (ip41, dst_port1)))
{
error1 = MAP_ERROR_FRAGMENT_MEMORY;
}
if (PREDICT_TRUE
(error0 == MAP_ERROR_NONE && next0 != IP4_MAPT_NEXT_MAPT_ICMP))
{
vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_TX,
cpu_index,
vnet_buffer (p0)->map_t.
map_domain_index, 1,
clib_net_to_host_u16 (ip40->
length));
}
if (PREDICT_TRUE
(error1 == MAP_ERROR_NONE && next1 != IP4_MAPT_NEXT_MAPT_ICMP))
{
vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_TX,
cpu_index,
vnet_buffer (p1)->map_t.
map_domain_index, 1,
clib_net_to_host_u16 (ip41->
length));
}
next0 = (error0 != MAP_ERROR_NONE) ? IP4_MAPT_NEXT_DROP : next0;
next1 = (error1 != MAP_ERROR_NONE) ? IP4_MAPT_NEXT_DROP : next1;
p0->error = error_node->errors[error0];
p1->error = error_node->errors[error1];
vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
n_left_to_next, pi0, pi1, next0,
next1);
}
#endif
while (n_left_from > 0 && n_left_to_next > 0)
{
u32 pi0;
vlib_buffer_t *p0;
ip4_header_t *ip40;
map_domain_t *d0;
ip4_mapt_next_t next0;
u16 ip4_len0;
u8 error0;
i32 dst_port0;
ip4_mapt_pseudo_header_t *pheader0;
pi0 = to_next[0] = from[0];
from += 1;
n_left_from -= 1;
to_next += 1;
n_left_to_next -= 1;
error0 = MAP_ERROR_NONE;
p0 = vlib_get_buffer (vm, pi0);
ip40 = vlib_buffer_get_current (p0);
ip4_len0 = clib_host_to_net_u16 (ip40->length);
if (PREDICT_FALSE (p0->current_length < ip4_len0 ||
ip40->ip_version_and_header_length != 0x45))
{
error0 = MAP_ERROR_UNKNOWN;
next0 = IP4_MAPT_NEXT_DROP;
}
vnet_buffer (p0)->map_t.map_domain_index =
vnet_buffer (p0)->ip.adj_index[VLIB_TX];
d0 = ip4_map_get_domain (vnet_buffer (p0)->map_t.map_domain_index);
vnet_buffer (p0)->map_t.mtu = d0->mtu ? d0->mtu : ~0;
dst_port0 = -1;
ip4_map_t_classify (p0, d0, ip40, ip4_len0, &dst_port0, &error0,
&next0);
//Add MAP-T pseudo header in front of the packet
vlib_buffer_advance (p0, -sizeof (*pheader0));
pheader0 = vlib_buffer_get_current (p0);
//Save addresses within the packet
ip4_map_t_embedded_address (d0, &pheader0->saddr,
&ip40->src_address);
pheader0->daddr.as_u64[0] =
map_get_pfx_net (d0, ip40->dst_address.as_u32, (u16) dst_port0);
pheader0->daddr.as_u64[1] =
map_get_sfx_net (d0, ip40->dst_address.as_u32, (u16) dst_port0);
//It is important to cache at this stage because the result might be necessary
//for packets within the same vector.
//Actually, this approach even provides some limited out-of-order fragments support
if (PREDICT_FALSE
(ip4_is_first_fragment (ip40) && (dst_port0 != -1)
&& (d0->ea_bits_len != 0 || !d0->rules)
&& ip4_map_fragment_cache (ip40, dst_port0)))
{
error0 = MAP_ERROR_UNKNOWN;
}
if (PREDICT_TRUE
(error0 == MAP_ERROR_NONE && next0 != IP4_MAPT_NEXT_MAPT_ICMP))
{
vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_TX,
cpu_index,
vnet_buffer (p0)->map_t.
map_domain_index, 1,
clib_net_to_host_u16 (ip40->
length));
}
next0 = (error0 != MAP_ERROR_NONE) ? IP4_MAPT_NEXT_DROP : next0;
p0->error = error_node->errors[error0];
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next, pi0,
next0);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
return frame->n_vectors;
}
static char *map_t_error_strings[] = {
#define _(sym,string) string,
foreach_map_error
#undef _
};
/* *INDENT-OFF* */
VLIB_REGISTER_NODE(ip4_map_t_fragmented_node) = {
.function = ip4_map_t_fragmented,
.name = "ip4-map-t-fragmented",
.vector_size = sizeof(u32),
.format_trace = format_map_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = MAP_N_ERROR,
.error_strings = map_t_error_strings,
.n_next_nodes = IP4_MAPT_FRAGMENTED_N_NEXT,
.next_nodes = {
[IP4_MAPT_FRAGMENTED_NEXT_IP6_LOOKUP] = "ip6-lookup",
[IP4_MAPT_FRAGMENTED_NEXT_IP6_FRAG] = IP6_FRAG_NODE_NAME,
[IP4_MAPT_FRAGMENTED_NEXT_DROP] = "error-drop",
},
};
/* *INDENT-ON* */
/* *INDENT-OFF* */
VLIB_REGISTER_NODE(ip4_map_t_icmp_node) = {
.function = ip4_map_t_icmp,
.name = "ip4-map-t-icmp",
.vector_size = sizeof(u32),
.format_trace = format_map_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = MAP_N_ERROR,
.error_strings = map_t_error_strings,
.n_next_nodes = IP4_MAPT_ICMP_N_NEXT,
.next_nodes = {
[IP4_MAPT_ICMP_NEXT_IP6_LOOKUP] = "ip6-lookup",
[IP4_MAPT_ICMP_NEXT_IP6_FRAG] = IP6_FRAG_NODE_NAME,
[IP4_MAPT_ICMP_NEXT_DROP] = "error-drop",
},
};
/* *INDENT-ON* */
/* *INDENT-OFF* */
VLIB_REGISTER_NODE(ip4_map_t_tcp_udp_node) = {
.function = ip4_map_t_tcp_udp,
.name = "ip4-map-t-tcp-udp",
.vector_size = sizeof(u32),
.format_trace = format_map_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = MAP_N_ERROR,
.error_strings = map_t_error_strings,
.n_next_nodes = IP4_MAPT_TCP_UDP_N_NEXT,
.next_nodes = {
[IP4_MAPT_TCP_UDP_NEXT_IP6_LOOKUP] = "ip6-lookup",
[IP4_MAPT_TCP_UDP_NEXT_IP6_FRAG] = IP6_FRAG_NODE_NAME,
[IP4_MAPT_TCP_UDP_NEXT_DROP] = "error-drop",
},
};
/* *INDENT-ON* */
/* *INDENT-OFF* */
VLIB_REGISTER_NODE(ip4_map_t_node) = {
.function = ip4_map_t,
.name = "ip4-map-t",
.vector_size = sizeof(u32),
.format_trace = format_map_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = MAP_N_ERROR,
.error_strings = map_t_error_strings,
.n_next_nodes = IP4_MAPT_N_NEXT,
.next_nodes = {
[IP4_MAPT_NEXT_MAPT_TCP_UDP] = "ip4-map-t-tcp-udp",
[IP4_MAPT_NEXT_MAPT_ICMP] = "ip4-map-t-icmp",
[IP4_MAPT_NEXT_MAPT_FRAGMENTED] = "ip4-map-t-fragmented",
[IP4_MAPT_NEXT_DROP] = "error-drop",
},
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/