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gerrit.nordix.org / fdio / vpp / 59f71132edffcfa1b94c400736575bd55bdbd7d7 / . / src / vnet / ip / ip6_forward.c
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/*
* Copyright (c) 2016 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.
*/
/*
* ip/ip6_forward.c: IP v6 forwarding
*
* Copyright (c) 2008 Eliot Dresselhaus
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <vnet/vnet.h>
#include <vnet/ip/ip.h>
#include <vnet/ip/ip_frag.h>
#include <vnet/ip/ip6_link.h>
#include <vnet/ethernet/ethernet.h> /* for ethernet_header_t */
#include <vnet/srp/srp.h> /* for srp_hw_interface_class */
#include <vppinfra/cache.h>
#include <vnet/fib/fib_urpf_list.h> /* for FIB uRPF check */
#include <vnet/fib/ip6_fib.h>
#include <vnet/mfib/ip6_mfib.h>
#include <vnet/dpo/load_balance_map.h>
#include <vnet/dpo/classify_dpo.h>
#include <vnet/classify/vnet_classify.h>
#ifndef CLIB_MARCH_VARIANT
#include <vppinfra/bihash_template.c>
#endif
#include <vnet/ip/ip6_forward.h>
#include <vnet/interface_output.h>
/* Flag used by IOAM code. Classifier sets it pop-hop-by-hop checks it */
#define OI_DECAP 0x80000000
static void
ip6_add_interface_prefix_routes (ip6_main_t * im,
u32 sw_if_index,
u32 fib_index,
ip6_address_t * address, u32 address_length)
{
ip_lookup_main_t *lm = &im->lookup_main;
ip_interface_prefix_t *if_prefix;
/* *INDENT-OFF* */
ip_interface_prefix_key_t key = {
.prefix = {
.fp_len = address_length,
.fp_proto = FIB_PROTOCOL_IP6,
.fp_addr.ip6 = {
.as_u64 = {
address->as_u64[0] & im->fib_masks[address_length].as_u64[0],
address->as_u64[1] & im->fib_masks[address_length].as_u64[1],
},
},
},
.sw_if_index = sw_if_index,
};
/* *INDENT-ON* */
/* If prefix already set on interface, just increment ref count & return */
if_prefix = ip_get_interface_prefix (lm, &key);
if (if_prefix)
{
if_prefix->ref_count += 1;
return;
}
/* New prefix - allocate a pool entry, initialize it, add to the hash */
pool_get (lm->if_prefix_pool, if_prefix);
if_prefix->ref_count = 1;
clib_memcpy (&if_prefix->key, &key, sizeof (key));
mhash_set (&lm->prefix_to_if_prefix_index, &key,
if_prefix - lm->if_prefix_pool, 0 /* old value */ );
/* length < 128 - add glean */
if (address_length < 128)
{
/* set the glean route for the prefix */
fib_table_entry_update_one_path (fib_index, &key.prefix,
FIB_SOURCE_INTERFACE,
(FIB_ENTRY_FLAG_CONNECTED |
FIB_ENTRY_FLAG_ATTACHED),
DPO_PROTO_IP6,
/* No next-hop address */
NULL, sw_if_index,
/* invalid FIB index */
~0, 1,
/* no out-label stack */
NULL, FIB_ROUTE_PATH_FLAG_NONE);
}
}
static void
ip6_add_interface_routes (vnet_main_t * vnm, u32 sw_if_index,
ip6_main_t * im, u32 fib_index,
ip_interface_address_t * a)
{
ip_lookup_main_t *lm = &im->lookup_main;
ip6_address_t *address = ip_interface_address_get_address (lm, a);
fib_prefix_t pfx = {
.fp_len = a->address_length,
.fp_proto = FIB_PROTOCOL_IP6,
.fp_addr.ip6 = *address,
};
/* set special routes for the prefix if needed */
ip6_add_interface_prefix_routes (im, sw_if_index, fib_index,
address, a->address_length);
pfx.fp_len = 128;
if (sw_if_index < vec_len (lm->classify_table_index_by_sw_if_index))
{
u32 classify_table_index =
lm->classify_table_index_by_sw_if_index[sw_if_index];
if (classify_table_index != (u32) ~ 0)
{
dpo_id_t dpo = DPO_INVALID;
dpo_set (&dpo,
DPO_CLASSIFY,
DPO_PROTO_IP6,
classify_dpo_create (DPO_PROTO_IP6, classify_table_index));
fib_table_entry_special_dpo_add (fib_index,
&pfx,
FIB_SOURCE_CLASSIFY,
FIB_ENTRY_FLAG_NONE, &dpo);
dpo_reset (&dpo);
}
}
fib_table_entry_update_one_path (fib_index, &pfx,
FIB_SOURCE_INTERFACE,
(FIB_ENTRY_FLAG_CONNECTED |
FIB_ENTRY_FLAG_LOCAL),
DPO_PROTO_IP6,
&pfx.fp_addr,
sw_if_index, ~0,
1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
}
static void
ip6_del_interface_prefix_routes (ip6_main_t * im,
u32 sw_if_index,
u32 fib_index,
ip6_address_t * address, u32 address_length)
{
ip_lookup_main_t *lm = &im->lookup_main;
ip_interface_prefix_t *if_prefix;
/* *INDENT-OFF* */
ip_interface_prefix_key_t key = {
.prefix = {
.fp_len = address_length,
.fp_proto = FIB_PROTOCOL_IP6,
.fp_addr.ip6 = {
.as_u64 = {
address->as_u64[0] & im->fib_masks[address_length].as_u64[0],
address->as_u64[1] & im->fib_masks[address_length].as_u64[1],
},
},
},
.sw_if_index = sw_if_index,
};
/* *INDENT-ON* */
if_prefix = ip_get_interface_prefix (lm, &key);
if (!if_prefix)
{
clib_warning ("Prefix not found while deleting %U",
format_ip4_address_and_length, address, address_length);
return;
}
/* If not deleting last intf addr in prefix, decrement ref count & return */
if_prefix->ref_count -= 1;
if (if_prefix->ref_count > 0)
return;
/* length <= 128, delete glean route */
if (address_length <= 128)
{
/* remove glean route for prefix */
fib_table_entry_delete (fib_index, &key.prefix, FIB_SOURCE_INTERFACE);
}
mhash_unset (&lm->prefix_to_if_prefix_index, &key, 0 /* old_value */ );
pool_put (lm->if_prefix_pool, if_prefix);
}
static void
ip6_del_interface_routes (u32 sw_if_index, ip6_main_t * im,
u32 fib_index,
ip6_address_t * address, u32 address_length)
{
fib_prefix_t pfx = {
.fp_len = 128,
.fp_proto = FIB_PROTOCOL_IP6,
.fp_addr.ip6 = *address,
};
/* delete special routes for the prefix if needed */
ip6_del_interface_prefix_routes (im, sw_if_index, fib_index,
address, address_length);
fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_INTERFACE);
}
#ifndef CLIB_MARCH_VARIANT
void
ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable)
{
ip6_main_t *im = &ip6_main;
vec_validate_init_empty (im->ip_enabled_by_sw_if_index, sw_if_index, 0);
/*
* enable/disable only on the 1<->0 transition
*/
if (is_enable)
{
if (1 != ++im->ip_enabled_by_sw_if_index[sw_if_index])
return;
}
else
{
/* The ref count is 0 when an address is removed from an interface that has
* no address - this is not a ciritical error */
if (0 == im->ip_enabled_by_sw_if_index[sw_if_index] ||
0 != --im->ip_enabled_by_sw_if_index[sw_if_index])
return;
}
vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
!is_enable, 0, 0);
vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
sw_if_index, !is_enable, 0, 0);
}
/* get first interface address */
ip6_address_t *
ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index)
{
ip_lookup_main_t *lm = &im->lookup_main;
ip_interface_address_t *ia = 0;
ip6_address_t *result = 0;
/* *INDENT-OFF* */
foreach_ip_interface_address (lm, ia, sw_if_index,
1 /* honor unnumbered */,
({
ip6_address_t * a = ip_interface_address_get_address (lm, ia);
result = a;
break;
}));
/* *INDENT-ON* */
return result;
}
clib_error_t *
ip6_add_del_interface_address (vlib_main_t * vm,
u32 sw_if_index,
ip6_address_t * address,
u32 address_length, u32 is_del)
{
vnet_main_t *vnm = vnet_get_main ();
ip6_main_t *im = &ip6_main;
ip_lookup_main_t *lm = &im->lookup_main;
clib_error_t *error = NULL;
u32 if_address_index;
ip6_address_fib_t ip6_af, *addr_fib = 0;
const ip6_address_t *ll_addr;
/* local0 interface doesn't support IP addressing */
if (sw_if_index == 0)
{
return
clib_error_create ("local0 interface doesn't support IP addressing");
}
if (ip6_address_is_link_local_unicast (address))
{
if (address_length != 128)
{
vnm->api_errno = VNET_API_ERROR_ADDRESS_LENGTH_MISMATCH;
return
clib_error_create
("prefix length of link-local address must be 128");
}
if (!is_del)
{
int rv;
rv = ip6_set_link_local_address (sw_if_index, address);
if (rv)
{
vnm->api_errno = rv;
return clib_error_create ("address not assignable");
}
}
else
{
ll_addr = ip6_get_link_local_address (sw_if_index);
if (ip6_address_is_equal (ll_addr, address))
{
vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_DELETABLE;
return clib_error_create ("address not deletable");
}
else
{
vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
return clib_error_create ("address not found");
}
}
}
vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
ip6_addr_fib_init (&ip6_af, address,
vec_elt (im->fib_index_by_sw_if_index, sw_if_index));
vec_add1 (addr_fib, ip6_af);
/* *INDENT-OFF* */
if (!is_del)
{
/* When adding an address check that it does not conflict
with an existing address on any interface in this table. */
ip_interface_address_t *ia;
vnet_sw_interface_t *sif;
pool_foreach(sif, vnm->interface_main.sw_interfaces,
({
if (im->fib_index_by_sw_if_index[sw_if_index] ==
im->fib_index_by_sw_if_index[sif->sw_if_index])
{
foreach_ip_interface_address
(&im->lookup_main, ia, sif->sw_if_index,
0 /* honor unnumbered */ ,
({
ip6_address_t * x =
ip_interface_address_get_address
(&im->lookup_main, ia);
if (ip6_destination_matches_route
(im, address, x, ia->address_length) ||
ip6_destination_matches_route (im,
x,
address,
address_length))
{
/* an intf may have >1 addr from the same prefix */
if ((sw_if_index == sif->sw_if_index) &&
(ia->address_length == address_length) &&
!ip6_address_is_equal (x, address))
continue;
if (ia->flags & IP_INTERFACE_ADDRESS_FLAG_STALE)
/* if the address we're comparing against is stale
* then the CP has not added this one back yet, maybe
* it never will, so we have to assume it won't and
* ignore it. if it does add it back, then it will fail
* because this one is now present */
continue;
/* error if the length or intf was different */
vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
error = clib_error_create
("failed to add %U which conflicts with %U for interface %U",
format_ip6_address_and_length, address,
address_length,
format_ip6_address_and_length, x,
ia->address_length,
format_vnet_sw_if_index_name, vnm,
sif->sw_if_index);
goto done;
}
}));
}
}));
}
/* *INDENT-ON* */
if_address_index = ip_interface_address_find (lm, addr_fib, address_length);
if (is_del)
{
if (~0 == if_address_index)
{
vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_FOUND_FOR_INTERFACE;
error = clib_error_create ("%U not found for interface %U",
lm->format_address_and_length,
addr_fib, address_length,
format_vnet_sw_if_index_name, vnm,
sw_if_index);
goto done;
}
ip_interface_address_del (lm, if_address_index, addr_fib);
}
else
{
if (~0 != if_address_index)
{
ip_interface_address_t *ia;
ia = pool_elt_at_index (lm->if_address_pool, if_address_index);
if (ia->flags & IP_INTERFACE_ADDRESS_FLAG_STALE)
{
if (ia->sw_if_index == sw_if_index)
{
/* re-adding an address during the replace action.
* consdier this the update. clear the flag and
* we're done */
ia->flags &= ~IP_INTERFACE_ADDRESS_FLAG_STALE;
goto done;
}
else
{
/* The prefix is moving from one interface to another.
* delete the stale and add the new */
ip6_add_del_interface_address (vm,
ia->sw_if_index,
address, address_length, 1);
ia = NULL;
error = ip_interface_address_add (lm, sw_if_index,
addr_fib, address_length,
&if_address_index);
}
}
else
{
vnm->api_errno = VNET_API_ERROR_DUPLICATE_IF_ADDRESS;
error = clib_error_create
("Prefix %U already found on interface %U",
lm->format_address_and_length, addr_fib, address_length,
format_vnet_sw_if_index_name, vnm, ia->sw_if_index);
}
}
else
error = ip_interface_address_add (lm, sw_if_index,
addr_fib, address_length,
&if_address_index);
}
if (error)
goto done;
ip6_sw_interface_enable_disable (sw_if_index, !is_del);
if (!is_del)
ip6_link_enable (sw_if_index);
/* intf addr routes are added/deleted on admin up/down */
if (vnet_sw_interface_is_admin_up (vnm, sw_if_index))
{
if (is_del)
ip6_del_interface_routes (sw_if_index,
im, ip6_af.fib_index, address,
address_length);
else
ip6_add_interface_routes (vnm, sw_if_index,
im, ip6_af.fib_index,
pool_elt_at_index (lm->if_address_pool,
if_address_index));
}
ip6_add_del_interface_address_callback_t *cb;
vec_foreach (cb, im->add_del_interface_address_callbacks)
cb->function (im, cb->function_opaque, sw_if_index,
address, address_length, if_address_index, is_del);
if (is_del)
ip6_link_disable (sw_if_index);
done:
vec_free (addr_fib);
return error;
}
#endif
static clib_error_t *
ip6_sw_interface_admin_up_down (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
{
ip6_main_t *im = &ip6_main;
ip_interface_address_t *ia;
ip6_address_t *a;
u32 is_admin_up, fib_index;
/* Fill in lookup tables with default table (0). */
vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
vec_validate_init_empty (im->
lookup_main.if_address_pool_index_by_sw_if_index,
sw_if_index, ~0);
is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
fib_index = vec_elt (im->fib_index_by_sw_if_index, sw_if_index);
/* *INDENT-OFF* */
foreach_ip_interface_address (&im->lookup_main, ia, sw_if_index,
0 /* honor unnumbered */,
({
a = ip_interface_address_get_address (&im->lookup_main, ia);
if (is_admin_up)
ip6_add_interface_routes (vnm, sw_if_index,
im, fib_index,
ia);
else
ip6_del_interface_routes (sw_if_index, im, fib_index,
a, ia->address_length);
}));
/* *INDENT-ON* */
return 0;
}
VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_sw_interface_admin_up_down);
/* Built-in ip6 unicast rx feature path definition */
/* *INDENT-OFF* */
VNET_FEATURE_ARC_INIT (ip6_unicast, static) =
{
.arc_name = "ip6-unicast",
.start_nodes = VNET_FEATURES ("ip6-input"),
.last_in_arc = "ip6-lookup",
.arc_index_ptr = &ip6_main.lookup_main.ucast_feature_arc_index,
};
VNET_FEATURE_INIT (ip6_flow_classify, static) =
{
.arc_name = "ip6-unicast",
.node_name = "ip6-flow-classify",
.runs_before = VNET_FEATURES ("ip6-inacl"),
};
VNET_FEATURE_INIT (ip6_inacl, static) =
{
.arc_name = "ip6-unicast",
.node_name = "ip6-inacl",
.runs_before = VNET_FEATURES ("ip6-policer-classify"),
};
VNET_FEATURE_INIT (ip6_policer_classify, static) =
{
.arc_name = "ip6-unicast",
.node_name = "ip6-policer-classify",
.runs_before = VNET_FEATURES ("ipsec6-input-feature"),
};
VNET_FEATURE_INIT (ip6_ipsec, static) =
{
.arc_name = "ip6-unicast",
.node_name = "ipsec6-input-feature",
.runs_before = VNET_FEATURES ("l2tp-decap"),
};
VNET_FEATURE_INIT (ip6_l2tp, static) =
{
.arc_name = "ip6-unicast",
.node_name = "l2tp-decap",
.runs_before = VNET_FEATURES ("vpath-input-ip6"),
};
VNET_FEATURE_INIT (ip6_vpath, static) =
{
.arc_name = "ip6-unicast",
.node_name = "vpath-input-ip6",
.runs_before = VNET_FEATURES ("ip6-vxlan-bypass"),
};
VNET_FEATURE_INIT (ip6_vxlan_bypass, static) =
{
.arc_name = "ip6-unicast",
.node_name = "ip6-vxlan-bypass",
.runs_before = VNET_FEATURES ("ip6-lookup"),
};
VNET_FEATURE_INIT (ip6_not_enabled, static) =
{
.arc_name = "ip6-unicast",
.node_name = "ip6-not-enabled",
.runs_before = VNET_FEATURES ("ip6-lookup"),
};
VNET_FEATURE_INIT (ip6_lookup, static) =
{
.arc_name = "ip6-unicast",
.node_name = "ip6-lookup",
.runs_before = 0, /*last feature*/
};
/* Built-in ip6 multicast rx feature path definition (none now) */
VNET_FEATURE_ARC_INIT (ip6_multicast, static) =
{
.arc_name = "ip6-multicast",
.start_nodes = VNET_FEATURES ("ip6-input"),
.last_in_arc = "ip6-mfib-forward-lookup",
.arc_index_ptr = &ip6_main.lookup_main.mcast_feature_arc_index,
};
VNET_FEATURE_INIT (ip6_vpath_mc, static) = {
.arc_name = "ip6-multicast",
.node_name = "vpath-input-ip6",
.runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
};
VNET_FEATURE_INIT (ip6_not_enabled_mc, static) = {
.arc_name = "ip6-multicast",
.node_name = "ip6-not-enabled",
.runs_before = VNET_FEATURES ("ip6-mfib-forward-lookup"),
};
VNET_FEATURE_INIT (ip6_mc_lookup, static) = {
.arc_name = "ip6-multicast",
.node_name = "ip6-mfib-forward-lookup",
.runs_before = 0, /* last feature */
};
/* Built-in ip4 tx feature path definition */
VNET_FEATURE_ARC_INIT (ip6_output, static) =
{
.arc_name = "ip6-output",
.start_nodes = VNET_FEATURES ("ip6-rewrite", "ip6-midchain", "ip6-dvr-dpo"),
.last_in_arc = "interface-output",
.arc_index_ptr = &ip6_main.lookup_main.output_feature_arc_index,
};
VNET_FEATURE_INIT (ip6_outacl, static) = {
.arc_name = "ip6-output",
.node_name = "ip6-outacl",
.runs_before = VNET_FEATURES ("ipsec6-output-feature"),
};
VNET_FEATURE_INIT (ip6_ipsec_output, static) = {
.arc_name = "ip6-output",
.node_name = "ipsec6-output-feature",
.runs_before = VNET_FEATURES ("interface-output"),
};
VNET_FEATURE_INIT (ip6_interface_output, static) = {
.arc_name = "ip6-output",
.node_name = "interface-output",
.runs_before = 0, /* not before any other features */
};
/* *INDENT-ON* */
static clib_error_t *
ip6_sw_interface_add_del (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
{
ip6_main_t *im = &ip6_main;
vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
vec_validate (im->mfib_index_by_sw_if_index, sw_if_index);
if (!is_add)
{
/* Ensure that IPv6 is disabled */
ip6_main_t *im6 = &ip6_main;
ip_lookup_main_t *lm6 = &im6->lookup_main;
ip_interface_address_t *ia = 0;
ip6_address_t *address;
vlib_main_t *vm = vlib_get_main ();
vnet_sw_interface_update_unnumbered (sw_if_index, ~0, 0);
/* *INDENT-OFF* */
foreach_ip_interface_address (lm6, ia, sw_if_index, 0,
({
address = ip_interface_address_get_address (lm6, ia);
ip6_add_del_interface_address(vm, sw_if_index, address, ia->address_length, 1);
}));
/* *INDENT-ON* */
ip6_mfib_interface_enable_disable (sw_if_index, 0);
}
vnet_feature_enable_disable ("ip6-unicast", "ip6-not-enabled", sw_if_index,
is_add, 0, 0);
vnet_feature_enable_disable ("ip6-multicast", "ip6-not-enabled",
sw_if_index, is_add, 0, 0);
return /* no error */ 0;
}
VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip6_sw_interface_add_del);
VLIB_NODE_FN (ip6_lookup_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
return ip6_lookup_inline (vm, node, frame);
}
static u8 *format_ip6_lookup_trace (u8 * s, va_list * args);
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_lookup_node) =
{
.name = "ip6-lookup",
.vector_size = sizeof (u32),
.format_trace = format_ip6_lookup_trace,
.n_next_nodes = IP6_LOOKUP_N_NEXT,
.next_nodes = IP6_LOOKUP_NEXT_NODES,
};
/* *INDENT-ON* */
VLIB_NODE_FN (ip6_load_balance_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
vlib_combined_counter_main_t *cm = &load_balance_main.lbm_via_counters;
u32 n_left, *from;
u32 thread_index = vm->thread_index;
ip6_main_t *im = &ip6_main;
vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
u16 nexts[VLIB_FRAME_SIZE], *next;
from = vlib_frame_vector_args (frame);
n_left = frame->n_vectors;
next = nexts;
vlib_get_buffers (vm, from, bufs, n_left);
while (n_left >= 4)
{
const load_balance_t *lb0, *lb1;
const ip6_header_t *ip0, *ip1;
u32 lbi0, hc0, lbi1, hc1;
const dpo_id_t *dpo0, *dpo1;
/* Prefetch next iteration. */
{
vlib_prefetch_buffer_header (b[2], STORE);
vlib_prefetch_buffer_header (b[3], STORE);
CLIB_PREFETCH (b[2]->data, sizeof (ip0[0]), STORE);
CLIB_PREFETCH (b[3]->data, sizeof (ip0[0]), STORE);
}
ip0 = vlib_buffer_get_current (b[0]);
ip1 = vlib_buffer_get_current (b[1]);
lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
lbi1 = vnet_buffer (b[1])->ip.adj_index[VLIB_TX];
lb0 = load_balance_get (lbi0);
lb1 = load_balance_get (lbi1);
/*
* this node is for via FIBs we can re-use the hash value from the
* to node if present.
* We don't want to use the same hash value at each level in the recursion
* graph as that would lead to polarisation
*/
hc0 = hc1 = 0;
if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
{
if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
{
hc0 = vnet_buffer (b[0])->ip.flow_hash =
vnet_buffer (b[0])->ip.flow_hash >> 1;
}
else
{
hc0 = vnet_buffer (b[0])->ip.flow_hash =
ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
}
dpo0 = load_balance_get_fwd_bucket
(lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
}
else
{
dpo0 = load_balance_get_bucket_i (lb0, 0);
}
if (PREDICT_FALSE (lb1->lb_n_buckets > 1))
{
if (PREDICT_TRUE (vnet_buffer (b[1])->ip.flow_hash))
{
hc1 = vnet_buffer (b[1])->ip.flow_hash =
vnet_buffer (b[1])->ip.flow_hash >> 1;
}
else
{
hc1 = vnet_buffer (b[1])->ip.flow_hash =
ip6_compute_flow_hash (ip1, lb1->lb_hash_config);
}
dpo1 = load_balance_get_fwd_bucket
(lb1, (hc1 & (lb1->lb_n_buckets_minus_1)));
}
else
{
dpo1 = load_balance_get_bucket_i (lb1, 0);
}
next[0] = dpo0->dpoi_next_node;
next[1] = dpo1->dpoi_next_node;
/* Only process the HBH Option Header if explicitly configured to do so */
if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
{
next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
(ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
}
/* Only process the HBH Option Header if explicitly configured to do so */
if (PREDICT_FALSE (ip1->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
{
next[1] = (dpo_is_adj (dpo1) && im->hbh_enabled) ?
(ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[1];
}
vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = dpo1->dpoi_index;
vlib_increment_combined_counter
(cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
vlib_increment_combined_counter
(cm, thread_index, lbi1, 1, vlib_buffer_length_in_chain (vm, b[1]));
b += 2;
next += 2;
n_left -= 2;
}
while (n_left > 0)
{
const load_balance_t *lb0;
const ip6_header_t *ip0;
const dpo_id_t *dpo0;
u32 lbi0, hc0;
ip0 = vlib_buffer_get_current (b[0]);
lbi0 = vnet_buffer (b[0])->ip.adj_index[VLIB_TX];
lb0 = load_balance_get (lbi0);
hc0 = 0;
if (PREDICT_FALSE (lb0->lb_n_buckets > 1))
{
if (PREDICT_TRUE (vnet_buffer (b[0])->ip.flow_hash))
{
hc0 = vnet_buffer (b[0])->ip.flow_hash =
vnet_buffer (b[0])->ip.flow_hash >> 1;
}
else
{
hc0 = vnet_buffer (b[0])->ip.flow_hash =
ip6_compute_flow_hash (ip0, lb0->lb_hash_config);
}
dpo0 = load_balance_get_fwd_bucket
(lb0, (hc0 & (lb0->lb_n_buckets_minus_1)));
}
else
{
dpo0 = load_balance_get_bucket_i (lb0, 0);
}
next[0] = dpo0->dpoi_next_node;
vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
/* Only process the HBH Option Header if explicitly configured to do so */
if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
{
next[0] = (dpo_is_adj (dpo0) && im->hbh_enabled) ?
(ip_lookup_next_t) IP6_LOOKUP_NEXT_HOP_BY_HOP : next[0];
}
vlib_increment_combined_counter
(cm, thread_index, lbi0, 1, vlib_buffer_length_in_chain (vm, b[0]));
b += 1;
next += 1;
n_left -= 1;
}
vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
if (node->flags & VLIB_NODE_FLAG_TRACE)
ip6_forward_next_trace (vm, node, frame, VLIB_TX);
return frame->n_vectors;
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_load_balance_node) =
{
.name = "ip6-load-balance",
.vector_size = sizeof (u32),
.sibling_of = "ip6-lookup",
.format_trace = format_ip6_lookup_trace,
};
/* *INDENT-ON* */
typedef struct
{
/* Adjacency taken. */
u32 adj_index;
u32 flow_hash;
u32 fib_index;
/* Packet data, possibly *after* rewrite. */
u8 packet_data[128 - 1 * sizeof (u32)];
}
ip6_forward_next_trace_t;
#ifndef CLIB_MARCH_VARIANT
u8 *
format_ip6_forward_next_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 *);
ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
u32 indent = format_get_indent (s);
s = format (s, "%U%U",
format_white_space, indent,
format_ip6_header, t->packet_data, sizeof (t->packet_data));
return s;
}
#endif
static u8 *
format_ip6_lookup_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 *);
ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
u32 indent = format_get_indent (s);
s = format (s, "fib %d dpo-idx %d flow hash: 0x%08x",
t->fib_index, t->adj_index, t->flow_hash);
s = format (s, "\n%U%U",
format_white_space, indent,
format_ip6_header, t->packet_data, sizeof (t->packet_data));
return s;
}
static u8 *
format_ip6_rewrite_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 *);
ip6_forward_next_trace_t *t = va_arg (*args, ip6_forward_next_trace_t *);
u32 indent = format_get_indent (s);
s = format (s, "tx_sw_if_index %d adj-idx %d : %U flow hash: 0x%08x",
t->fib_index, t->adj_index, format_ip_adjacency,
t->adj_index, FORMAT_IP_ADJACENCY_NONE, t->flow_hash);
s = format (s, "\n%U%U",
format_white_space, indent,
format_ip_adjacency_packet_data,
t->packet_data, sizeof (t->packet_data));
return s;
}
/* Common trace function for all ip6-forward next nodes. */
#ifndef CLIB_MARCH_VARIANT
void
ip6_forward_next_trace (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame, vlib_rx_or_tx_t which_adj_index)
{
u32 *from, n_left;
ip6_main_t *im = &ip6_main;
n_left = frame->n_vectors;
from = vlib_frame_vector_args (frame);
while (n_left >= 4)
{
u32 bi0, bi1;
vlib_buffer_t *b0, *b1;
ip6_forward_next_trace_t *t0, *t1;
/* Prefetch next iteration. */
vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
bi0 = from[0];
bi1 = from[1];
b0 = vlib_get_buffer (vm, bi0);
b1 = vlib_get_buffer (vm, bi1);
if (b0->flags & VLIB_BUFFER_IS_TRACED)
{
t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
t0->fib_index =
(vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
(u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
vec_elt (im->fib_index_by_sw_if_index,
vnet_buffer (b0)->sw_if_index[VLIB_RX]);
clib_memcpy_fast (t0->packet_data,
vlib_buffer_get_current (b0),
sizeof (t0->packet_data));
}
if (b1->flags & VLIB_BUFFER_IS_TRACED)
{
t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
t1->adj_index = vnet_buffer (b1)->ip.adj_index[which_adj_index];
t1->flow_hash = vnet_buffer (b1)->ip.flow_hash;
t1->fib_index =
(vnet_buffer (b1)->sw_if_index[VLIB_TX] !=
(u32) ~ 0) ? vnet_buffer (b1)->sw_if_index[VLIB_TX] :
vec_elt (im->fib_index_by_sw_if_index,
vnet_buffer (b1)->sw_if_index[VLIB_RX]);
clib_memcpy_fast (t1->packet_data,
vlib_buffer_get_current (b1),
sizeof (t1->packet_data));
}
from += 2;
n_left -= 2;
}
while (n_left >= 1)
{
u32 bi0;
vlib_buffer_t *b0;
ip6_forward_next_trace_t *t0;
bi0 = from[0];
b0 = vlib_get_buffer (vm, bi0);
if (b0->flags & VLIB_BUFFER_IS_TRACED)
{
t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
t0->adj_index = vnet_buffer (b0)->ip.adj_index[which_adj_index];
t0->flow_hash = vnet_buffer (b0)->ip.flow_hash;
t0->fib_index =
(vnet_buffer (b0)->sw_if_index[VLIB_TX] !=
(u32) ~ 0) ? vnet_buffer (b0)->sw_if_index[VLIB_TX] :
vec_elt (im->fib_index_by_sw_if_index,
vnet_buffer (b0)->sw_if_index[VLIB_RX]);
clib_memcpy_fast (t0->packet_data,
vlib_buffer_get_current (b0),
sizeof (t0->packet_data));
}
from += 1;
n_left -= 1;
}
}
/* Compute TCP/UDP/ICMP6 checksum in software. */
u16
ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
ip6_header_t * ip0, int *bogus_lengthp)
{
ip_csum_t sum0 = 0;
u16 payload_length, payload_length_host_byte_order;
u32 i;
u32 headers_size = sizeof (ip0[0]);
u8 *data_this_buffer;
u8 next_hdr = ip0->protocol;
ASSERT (bogus_lengthp);
*bogus_lengthp = 0;
payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
data_this_buffer = (u8 *) (ip0 + 1);
payload_length = ip0->payload_length;
/* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets)
* or UDP-Ping packets */
if (PREDICT_FALSE (next_hdr == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS))
{
u32 skip_bytes;
ip6_hop_by_hop_ext_t *ext_hdr =
(ip6_hop_by_hop_ext_t *) data_this_buffer;
/* validate really icmp6 next */
ASSERT ((ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
|| (ext_hdr->next_hdr == IP_PROTOCOL_UDP));
skip_bytes = 8 * (1 + ext_hdr->n_data_u64s);
data_this_buffer = (void *) ((u8 *) data_this_buffer + skip_bytes);
payload_length_host_byte_order -= skip_bytes;
headers_size += skip_bytes;
/* pseudo-header adjustments:
* exclude ext header bytes from payload length
* use payload IP proto rather than ext header IP proto
*/
payload_length = clib_host_to_net_u16 (payload_length_host_byte_order);
next_hdr = ext_hdr->next_hdr;
}
/* Initialize checksum with ip pseudo-header. */
sum0 = payload_length + clib_host_to_net_u16 (next_hdr);
for (i = 0; i < ARRAY_LEN (ip0->src_address.as_uword); i++)
{
sum0 = ip_csum_with_carry
(sum0, clib_mem_unaligned (&ip0->src_address.as_uword[i], uword));
sum0 = ip_csum_with_carry
(sum0, clib_mem_unaligned (&ip0->dst_address.as_uword[i], uword));
}
if (p0)
return ip_calculate_l4_checksum (vm, p0, sum0,
payload_length_host_byte_order,
(u8 *) ip0, headers_size, NULL);
else
return ip_calculate_l4_checksum (vm, 0, sum0,
payload_length_host_byte_order, NULL, 0,
data_this_buffer);
}
u32
ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0)
{
ip6_header_t *ip0 = vlib_buffer_get_current (p0);
udp_header_t *udp0;
u16 sum16;
int bogus_length;
/* some icmp packets may come with a "router alert" hop-by-hop extension header (e.g., mldv2 packets) */
ASSERT (ip0->protocol == IP_PROTOCOL_TCP
|| ip0->protocol == IP_PROTOCOL_ICMP6
|| ip0->protocol == IP_PROTOCOL_UDP
|| ip0->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS);
udp0 = (void *) (ip0 + 1);
if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0)
{
p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
| VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
return p0->flags;
}
sum16 = ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, &bogus_length);
p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED
| ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));
return p0->flags;
}
#endif
/**
* @brief returns number of links on which src is reachable.
*/
always_inline int
ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
{
const load_balance_t *lb0;
index_t lbi;
u32 fib_index;
fib_index = vec_elt (im->fib_index_by_sw_if_index,
vnet_buffer (b)->sw_if_index[VLIB_RX]);
fib_index =
(vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX];
lbi = ip6_fib_table_fwding_lookup (fib_index, &i->src_address);
lb0 = load_balance_get (lbi);
return (fib_urpf_check_size (lb0->lb_urpf));
}
always_inline u8
ip6_next_proto_is_tcp_udp (vlib_buffer_t * p0, ip6_header_t * ip0,
u32 * udp_offset0)
{
u32 proto0;
proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_UDP, udp_offset0);
if (proto0 != IP_PROTOCOL_UDP)
{
proto0 = ip6_locate_header (p0, ip0, IP_PROTOCOL_TCP, udp_offset0);
proto0 = (proto0 == IP_PROTOCOL_TCP) ? proto0 : 0;
}
return proto0;
}
/* *INDENT-OFF* */
VNET_FEATURE_ARC_INIT (ip6_local) =
{
.arc_name = "ip6-local",
.start_nodes = VNET_FEATURES ("ip6-local"),
};
/* *INDENT-ON* */
static_always_inline u8
ip6_tcp_udp_icmp_bad_length (vlib_main_t * vm, vlib_buffer_t * p0)
{
u16 payload_length_host_byte_order;
u32 n_this_buffer, n_bytes_left;
ip6_header_t *ip0 = vlib_buffer_get_current (p0);
u32 headers_size = sizeof (ip0[0]);
u8 *data_this_buffer;
data_this_buffer = (u8 *) (ip0 + 1);
ip6_hop_by_hop_ext_t *ext_hdr = (ip6_hop_by_hop_ext_t *) data_this_buffer;
/* validate really icmp6 next */
if (!(ext_hdr->next_hdr == IP_PROTOCOL_ICMP6)
|| (ext_hdr->next_hdr == IP_PROTOCOL_UDP))
return 0;
payload_length_host_byte_order = clib_net_to_host_u16 (ip0->payload_length);
n_bytes_left = n_this_buffer = payload_length_host_byte_order;
u32 n_ip_bytes_this_buffer =
p0->current_length - (((u8 *) ip0 - p0->data) - p0->current_data);
if (n_this_buffer + headers_size > n_ip_bytes_this_buffer)
{
n_this_buffer = p0->current_length > headers_size ?
n_ip_bytes_this_buffer - headers_size : 0;
}
n_bytes_left -= n_this_buffer;
n_bytes_left -= p0->total_length_not_including_first_buffer;
if (n_bytes_left == 0)
return 0;
else
return 1;
}
always_inline uword
ip6_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * frame, int head_of_feature_arc)
{
ip6_main_t *im = &ip6_main;
ip_lookup_main_t *lm = &im->lookup_main;
u32 *from, n_left_from;
vlib_node_runtime_t *error_node =
vlib_node_get_runtime (vm, ip6_input_node.index);
u8 arc_index = vnet_feat_arc_ip6_local.feature_arc_index;
vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
u16 nexts[VLIB_FRAME_SIZE], *next;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
if (node->flags & VLIB_NODE_FLAG_TRACE)
ip6_forward_next_trace (vm, node, frame, VLIB_TX);
vlib_get_buffers (vm, from, bufs, n_left_from);
b = bufs;
next = nexts;
while (n_left_from > 2)
{
/* Prefetch next iteration. */
if (n_left_from >= 6)
{
vlib_prefetch_buffer_header (b[4], STORE);
vlib_prefetch_buffer_header (b[5], STORE);
vlib_prefetch_buffer_data (b[2], LOAD);
vlib_prefetch_buffer_data (b[3], LOAD);
}
u8 error[2];
error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
ip6_header_t *ip[2];
ip[0] = vlib_buffer_get_current (b[0]);
ip[1] = vlib_buffer_get_current (b[1]);
if (head_of_feature_arc)
{
vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
vnet_buffer (b[1])->l3_hdr_offset = b[1]->current_data;
u8 type[2];
type[0] = lm->builtin_protocol_by_ip_protocol[ip[0]->protocol];
type[1] = lm->builtin_protocol_by_ip_protocol[ip[1]->protocol];
u32 flags[2];
flags[0] = b[0]->flags;
flags[1] = b[1]->flags;
u32 good_l4_csum[2];
good_l4_csum[0] =
flags[0] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
good_l4_csum[1] =
flags[1] & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
u32 udp_offset[2] = { };
u8 is_tcp_udp[2];
is_tcp_udp[0] =
ip6_next_proto_is_tcp_udp (b[0], ip[0], &udp_offset[0]);
is_tcp_udp[1] =
ip6_next_proto_is_tcp_udp (b[1], ip[1], &udp_offset[1]);
i16 len_diff[2] = { 0 };
if (PREDICT_TRUE (is_tcp_udp[0]))
{
udp_header_t *udp =
(udp_header_t *) ((u8 *) ip[0] + udp_offset[0]);
good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UDP
&& udp->checksum == 0;
/* optimistically verify UDP length. */
u16 ip_len, udp_len;
ip_len = clib_net_to_host_u16 (ip[0]->payload_length);
udp_len = clib_net_to_host_u16 (udp->length);
len_diff[0] = ip_len - udp_len;
}
if (PREDICT_TRUE (is_tcp_udp[1]))
{
udp_header_t *udp =
(udp_header_t *) ((u8 *) ip[1] + udp_offset[1]);
good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UDP
&& udp->checksum == 0;
/* optimistically verify UDP length. */
u16 ip_len, udp_len;
ip_len = clib_net_to_host_u16 (ip[1]->payload_length);
udp_len = clib_net_to_host_u16 (udp->length);
len_diff[1] = ip_len - udp_len;
}
good_l4_csum[0] |= type[0] == IP_BUILTIN_PROTOCOL_UNKNOWN;
good_l4_csum[1] |= type[1] == IP_BUILTIN_PROTOCOL_UNKNOWN;
len_diff[0] = type[0] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[0] : 0;
len_diff[1] = type[1] == IP_BUILTIN_PROTOCOL_UDP ? len_diff[1] : 0;
u8 need_csum[2];
need_csum[0] = type[0] != IP_BUILTIN_PROTOCOL_UNKNOWN
&& !good_l4_csum[0]
&& !(flags[0] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
need_csum[1] = type[1] != IP_BUILTIN_PROTOCOL_UNKNOWN
&& !good_l4_csum[1]
&& !(flags[1] & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
if (PREDICT_FALSE (need_csum[0]))
{
flags[0] = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
good_l4_csum[0] = flags[0] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
error[0] = IP6_ERROR_UNKNOWN_PROTOCOL;
}
else
{
if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
error[0] = IP6_ERROR_BAD_LENGTH;
}
if (PREDICT_FALSE (need_csum[1]))
{
flags[1] = ip6_tcp_udp_icmp_validate_checksum (vm, b[1]);
good_l4_csum[1] = flags[1] & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
error[1] = IP6_ERROR_UNKNOWN_PROTOCOL;
}
else
{
if (ip6_tcp_udp_icmp_bad_length (vm, b[1]))
error[1] = IP6_ERROR_BAD_LENGTH;
}
error[0] = len_diff[0] < 0 ? IP6_ERROR_UDP_LENGTH : error[0];
error[1] = len_diff[1] < 0 ? IP6_ERROR_UDP_LENGTH : error[1];
STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
IP6_ERROR_UDP_CHECKSUM,
"Wrong IP6 errors constants");
STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
IP6_ERROR_ICMP_CHECKSUM,
"Wrong IP6 errors constants");
error[0] =
!good_l4_csum[0] ? IP6_ERROR_UDP_CHECKSUM + type[0] : error[0];
error[1] =
!good_l4_csum[1] ? IP6_ERROR_UDP_CHECKSUM + type[1] : error[1];
/* Drop packets from unroutable hosts. */
/* If this is a neighbor solicitation (ICMP), skip source RPF check */
u8 unroutable[2];
unroutable[0] = error[0] == IP6_ERROR_UNKNOWN_PROTOCOL
&& type[0] != IP_BUILTIN_PROTOCOL_ICMP
&& !ip6_address_is_link_local_unicast (&ip[0]->src_address);
unroutable[1] = error[1] == IP6_ERROR_UNKNOWN_PROTOCOL
&& type[1] != IP_BUILTIN_PROTOCOL_ICMP
&& !ip6_address_is_link_local_unicast (&ip[1]->src_address);
if (PREDICT_FALSE (unroutable[0]))
{
error[0] =
!ip6_urpf_loose_check (im, b[0],
ip[0]) ? IP6_ERROR_SRC_LOOKUP_MISS
: error[0];
}
if (PREDICT_FALSE (unroutable[1]))
{
error[1] =
!ip6_urpf_loose_check (im, b[1],
ip[1]) ? IP6_ERROR_SRC_LOOKUP_MISS
: error[1];
}
vnet_buffer (b[0])->ip.fib_index =
vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
vnet_buffer (b[0])->ip.fib_index;
vnet_buffer (b[1])->ip.fib_index =
vnet_buffer (b[1])->sw_if_index[VLIB_TX] != ~0 ?
vnet_buffer (b[1])->sw_if_index[VLIB_TX] :
vnet_buffer (b[1])->ip.fib_index;
} /* head_of_feature_arc */
next[0] = lm->local_next_by_ip_protocol[ip[0]->protocol];
next[0] =
error[0] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
next[1] = lm->local_next_by_ip_protocol[ip[1]->protocol];
next[1] =
error[1] != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[1];
b[0]->error = error_node->errors[0];
b[1]->error = error_node->errors[1];
if (head_of_feature_arc)
{
u8 ip6_unknown[2];
ip6_unknown[0] = error[0] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
ip6_unknown[1] = error[1] == (u8) IP6_ERROR_UNKNOWN_PROTOCOL;
if (PREDICT_TRUE (ip6_unknown[0]))
{
u32 next32 = next[0];
vnet_feature_arc_start (arc_index,
vnet_buffer (b[0])->sw_if_index
[VLIB_RX], &next32, b[0]);
next[0] = next32;
}
if (PREDICT_TRUE (ip6_unknown[1]))
{
u32 next32 = next[1];
vnet_feature_arc_start (arc_index,
vnet_buffer (b[1])->sw_if_index
[VLIB_RX], &next32, b[1]);
next[1] = next32;
}
}
/* next */
b += 2;
next += 2;
n_left_from -= 2;
}
while (n_left_from)
{
u8 error;
error = IP6_ERROR_UNKNOWN_PROTOCOL;
ip6_header_t *ip;
ip = vlib_buffer_get_current (b[0]);
if (head_of_feature_arc)
{
vnet_buffer (b[0])->l3_hdr_offset = b[0]->current_data;
u8 type = lm->builtin_protocol_by_ip_protocol[ip->protocol];
u32 flags = b[0]->flags;
u32 good_l4_csum =
flags & (VNET_BUFFER_F_L4_CHECKSUM_CORRECT |
VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
VNET_BUFFER_F_OFFLOAD_UDP_CKSUM);
u32 udp_offset;
i16 len_diff = 0;
u8 is_tcp_udp = ip6_next_proto_is_tcp_udp (b[0], ip, &udp_offset);
if (PREDICT_TRUE (is_tcp_udp))
{
udp_header_t *udp = (udp_header_t *) ((u8 *) ip + udp_offset);
/* Don't verify UDP checksum for packets with explicit zero checksum. */
good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UDP
&& udp->checksum == 0;
/* optimistically verify UDP length. */
u16 ip_len, udp_len;
ip_len = clib_net_to_host_u16 (ip->payload_length);
udp_len = clib_net_to_host_u16 (udp->length);
len_diff = ip_len - udp_len;
}
good_l4_csum |= type == IP_BUILTIN_PROTOCOL_UNKNOWN;
len_diff = type == IP_BUILTIN_PROTOCOL_UDP ? len_diff : 0;
u8 need_csum = type != IP_BUILTIN_PROTOCOL_UNKNOWN && !good_l4_csum
&& !(flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED);
if (PREDICT_FALSE (need_csum))
{
flags = ip6_tcp_udp_icmp_validate_checksum (vm, b[0]);
good_l4_csum = flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT;
error = IP6_ERROR_UNKNOWN_PROTOCOL;
}
else
{
if (ip6_tcp_udp_icmp_bad_length (vm, b[0]))
error = IP6_ERROR_BAD_LENGTH;
}
error = len_diff < 0 ? IP6_ERROR_UDP_LENGTH : error;
STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_UDP ==
IP6_ERROR_UDP_CHECKSUM,
"Wrong IP6 errors constants");
STATIC_ASSERT (IP6_ERROR_UDP_CHECKSUM + IP_BUILTIN_PROTOCOL_ICMP ==
IP6_ERROR_ICMP_CHECKSUM,
"Wrong IP6 errors constants");
error = !good_l4_csum ? IP6_ERROR_UDP_CHECKSUM + type : error;
/* Drop packets from unroutable hosts. */
/* If this is a neighbor solicitation (ICMP), skip source RPF check */
u8 unroutable = error == IP6_ERROR_UNKNOWN_PROTOCOL
&& type != IP_BUILTIN_PROTOCOL_ICMP
&& !ip6_address_is_link_local_unicast (&ip->src_address);
if (PREDICT_FALSE (unroutable))
{
error =
!ip6_urpf_loose_check (im, b[0],
ip) ? IP6_ERROR_SRC_LOOKUP_MISS :
error;
}
vnet_buffer (b[0])->ip.fib_index =
vnet_buffer (b[0])->sw_if_index[VLIB_TX] != ~0 ?
vnet_buffer (b[0])->sw_if_index[VLIB_TX] :
vnet_buffer (b[0])->ip.fib_index;
} /* head_of_feature_arc */
next[0] = lm->local_next_by_ip_protocol[ip->protocol];
next[0] =
error != IP6_ERROR_UNKNOWN_PROTOCOL ? IP_LOCAL_NEXT_DROP : next[0];
b[0]->error = error_node->errors[0];
if (head_of_feature_arc)
{
if (PREDICT_TRUE (error == (u8) IP6_ERROR_UNKNOWN_PROTOCOL))
{
u32 next32 = next[0];
vnet_feature_arc_start (arc_index,
vnet_buffer (b[0])->sw_if_index
[VLIB_RX], &next32, b[0]);
next[0] = next32;
}
}
/* next */
b += 1;
next += 1;
n_left_from -= 1;
}
vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
return frame->n_vectors;
}
VLIB_NODE_FN (ip6_local_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
return ip6_local_inline (vm, node, frame, 1 /* head of feature arc */ );
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_local_node) =
{
.name = "ip6-local",
.vector_size = sizeof (u32),
.format_trace = format_ip6_forward_next_trace,
.n_next_nodes = IP_LOCAL_N_NEXT,
.next_nodes =
{
[IP_LOCAL_NEXT_DROP] = "ip6-drop",
[IP_LOCAL_NEXT_PUNT] = "ip6-punt",
[IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup",
[IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input",
[IP_LOCAL_NEXT_REASSEMBLY] = "ip6-full-reassembly",
},
};
/* *INDENT-ON* */
VLIB_NODE_FN (ip6_local_end_of_arc_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
return ip6_local_inline (vm, node, frame, 0 /* head of feature arc */ );
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_local_end_of_arc_node) = {
.name = "ip6-local-end-of-arc",
.vector_size = sizeof (u32),
.format_trace = format_ip6_forward_next_trace,
.sibling_of = "ip6-local",
};
VNET_FEATURE_INIT (ip6_local_end_of_arc, static) = {
.arc_name = "ip6-local",
.node_name = "ip6-local-end-of-arc",
.runs_before = 0, /* not before any other features */
};
/* *INDENT-ON* */
#ifdef CLIB_MARCH_VARIANT
extern vlib_node_registration_t ip6_local_node;
#else
void
ip6_register_protocol (u32 protocol, u32 node_index)
{
vlib_main_t *vm = vlib_get_main ();
ip6_main_t *im = &ip6_main;
ip_lookup_main_t *lm = &im->lookup_main;
ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
lm->local_next_by_ip_protocol[protocol] =
vlib_node_add_next (vm, ip6_local_node.index, node_index);
}
void
ip6_unregister_protocol (u32 protocol)
{
ip6_main_t *im = &ip6_main;
ip_lookup_main_t *lm = &im->lookup_main;
ASSERT (protocol < ARRAY_LEN (lm->local_next_by_ip_protocol));
lm->local_next_by_ip_protocol[protocol] = IP_LOCAL_NEXT_PUNT;
}
#endif
typedef enum
{
IP6_REWRITE_NEXT_DROP,
IP6_REWRITE_NEXT_ICMP_ERROR,
IP6_REWRITE_NEXT_FRAGMENT,
IP6_REWRITE_N_NEXT /* Last */
} ip6_rewrite_next_t;
/**
* This bits of an IPv6 address to mask to construct a multicast
* MAC address
*/
#define IP6_MCAST_ADDR_MASK 0xffffffff
always_inline void
ip6_mtu_check (vlib_buffer_t * b, u16 packet_bytes,
u16 adj_packet_bytes, bool is_locally_generated,
u32 * next, u8 is_midchain, u32 * error)
{
if (adj_packet_bytes >= 1280 && packet_bytes > adj_packet_bytes)
{
if (is_locally_generated)
{
/* IP fragmentation */
ip_frag_set_vnet_buffer (b, adj_packet_bytes,
(is_midchain ?
IP_FRAG_NEXT_IP_REWRITE_MIDCHAIN :
IP_FRAG_NEXT_IP_REWRITE), 0);
*next = IP6_REWRITE_NEXT_FRAGMENT;
*error = IP6_ERROR_MTU_EXCEEDED;
}
else
{
*error = IP6_ERROR_MTU_EXCEEDED;
icmp6_error_set_vnet_buffer (b, ICMP6_packet_too_big, 0,
adj_packet_bytes);
*next = IP6_REWRITE_NEXT_ICMP_ERROR;
}
}
}
always_inline uword
ip6_rewrite_inline_with_gso (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame,
int do_counters, int is_midchain, int is_mcast)
{
ip_lookup_main_t *lm = &ip6_main.lookup_main;
u32 *from = vlib_frame_vector_args (frame);
u32 n_left_from, n_left_to_next, *to_next, next_index;
vlib_node_runtime_t *error_node =
vlib_node_get_runtime (vm, ip6_input_node.index);
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
u32 thread_index = vm->thread_index;
while (n_left_from > 0)
{
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from >= 4 && n_left_to_next >= 2)
{
const ip_adjacency_t *adj0, *adj1;
vlib_buffer_t *p0, *p1;
ip6_header_t *ip0, *ip1;
u32 pi0, rw_len0, next0, error0, adj_index0;
u32 pi1, rw_len1, next1, error1, adj_index1;
u32 tx_sw_if_index0, tx_sw_if_index1;
bool is_locally_originated0, is_locally_originated1;
/* Prefetch next iteration. */
{
vlib_buffer_t *p2, *p3;
p2 = vlib_get_buffer (vm, from[2]);
p3 = vlib_get_buffer (vm, from[3]);
vlib_prefetch_buffer_header (p2, LOAD);
vlib_prefetch_buffer_header (p3, LOAD);
CLIB_PREFETCH (p2->pre_data, 32, STORE);
CLIB_PREFETCH (p3->pre_data, 32, STORE);
CLIB_PREFETCH (p2->data, sizeof (ip0[0]), STORE);
CLIB_PREFETCH (p3->data, sizeof (ip0[0]), STORE);
}
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;
p0 = vlib_get_buffer (vm, pi0);
p1 = vlib_get_buffer (vm, pi1);
adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
adj_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
ip0 = vlib_buffer_get_current (p0);
ip1 = vlib_buffer_get_current (p1);
error0 = error1 = IP6_ERROR_NONE;
next0 = next1 = IP6_REWRITE_NEXT_DROP;
is_locally_originated0 =
p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
if (PREDICT_TRUE (!is_locally_originated0))
{
i32 hop_limit0 = ip0->hop_limit;
/* Input node should have reject packets with hop limit 0. */
ASSERT (ip0->hop_limit > 0);
hop_limit0 -= 1;
ip0->hop_limit = hop_limit0;
/*
* If the hop count drops below 1 when forwarding, generate
* an ICMP response.
*/
if (PREDICT_FALSE (hop_limit0 <= 0))
{
error0 = IP6_ERROR_TIME_EXPIRED;
next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
ICMP6_time_exceeded_ttl_exceeded_in_transit,
0);
}
}
is_locally_originated1 =
p1->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
if (PREDICT_TRUE (!is_locally_originated1))
{
i32 hop_limit1 = ip1->hop_limit;
/* Input node should have reject packets with hop limit 0. */
ASSERT (ip1->hop_limit > 0);
hop_limit1 -= 1;
ip1->hop_limit = hop_limit1;
/*
* If the hop count drops below 1 when forwarding, generate
* an ICMP response.
*/
if (PREDICT_FALSE (hop_limit1 <= 0))
{
error1 = IP6_ERROR_TIME_EXPIRED;
next1 = IP6_REWRITE_NEXT_ICMP_ERROR;
vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
icmp6_error_set_vnet_buffer (p1, ICMP6_time_exceeded,
ICMP6_time_exceeded_ttl_exceeded_in_transit,
0);
}
}
adj0 = adj_get (adj_index0);
adj1 = adj_get (adj_index1);
rw_len0 = adj0[0].rewrite_header.data_bytes;
rw_len1 = adj1[0].rewrite_header.data_bytes;
vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
if (do_counters)
{
vlib_increment_combined_counter
(&adjacency_counters,
thread_index, adj_index0, 1,
vlib_buffer_length_in_chain (vm, p0) + rw_len0);
vlib_increment_combined_counter
(&adjacency_counters,
thread_index, adj_index1, 1,
vlib_buffer_length_in_chain (vm, p1) + rw_len1);
}
/* Check MTU of outgoing interface. */
u16 ip0_len =
clib_net_to_host_u16 (ip0->payload_length) +
sizeof (ip6_header_t);
u16 ip1_len =
clib_net_to_host_u16 (ip1->payload_length) +
sizeof (ip6_header_t);
if (p0->flags & VNET_BUFFER_F_GSO)
ip0_len = gso_mtu_sz (p0);
if (p1->flags & VNET_BUFFER_F_GSO)
ip1_len = gso_mtu_sz (p1);
ip6_mtu_check (p0, ip0_len,
adj0[0].rewrite_header.max_l3_packet_bytes,
is_locally_originated0, &next0, is_midchain,
&error0);
ip6_mtu_check (p1, ip1_len,
adj1[0].rewrite_header.max_l3_packet_bytes,
is_locally_originated1, &next1, is_midchain,
&error1);
/* Don't adjust the buffer for hop count issue; icmp-error node
* wants to see the IP header */
if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
{
p0->current_data -= rw_len0;
p0->current_length += rw_len0;
tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
next0 = adj0[0].rewrite_header.next_index;
if (PREDICT_FALSE
(adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
vnet_feature_arc_start (lm->output_feature_arc_index,
tx_sw_if_index0, &next0, p0);
}
else
{
p0->error = error_node->errors[error0];
}
if (PREDICT_TRUE (error1 == IP6_ERROR_NONE))
{
p1->current_data -= rw_len1;
p1->current_length += rw_len1;
tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
next1 = adj1[0].rewrite_header.next_index;
if (PREDICT_FALSE
(adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
vnet_feature_arc_start (lm->output_feature_arc_index,
tx_sw_if_index1, &next1, p1);
}
else
{
p1->error = error_node->errors[error1];
}
if (is_midchain)
{
/* before we paint on the next header, update the L4
* checksums if required, since there's no offload on a tunnel */
vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
1 /* is_ip6 */ ,
0 /* with gso */ );
vnet_calc_checksums_inline (vm, p1, 0 /* is_ip4 */ ,
1 /* is_ip6 */ ,
0 /* with gso */ );
}
/* Guess we are only writing on simple Ethernet header. */
vnet_rewrite_two_headers (adj0[0], adj1[0],
ip0, ip1, sizeof (ethernet_header_t));
if (is_midchain)
{
if (adj0->sub_type.midchain.fixup_func)
adj0->sub_type.midchain.fixup_func
(vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
if (adj1->sub_type.midchain.fixup_func)
adj1->sub_type.midchain.fixup_func
(vm, adj1, p1, adj1->sub_type.midchain.fixup_data);
}
if (is_mcast)
{
/*
* copy bytes from the IP address into the MAC rewrite
*/
vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
adj0->
rewrite_header.dst_mcast_offset,
&ip0->dst_address.as_u32[3],
(u8 *) ip0);
vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
adj1->
rewrite_header.dst_mcast_offset,
&ip1->dst_address.as_u32[3],
(u8 *) ip1);
}
vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
to_next, n_left_to_next,
pi0, pi1, next0, next1);
}
while (n_left_from > 0 && n_left_to_next > 0)
{
ip_adjacency_t *adj0;
vlib_buffer_t *p0;
ip6_header_t *ip0;
u32 pi0, rw_len0;
u32 adj_index0, next0, error0;
u32 tx_sw_if_index0;
bool is_locally_originated0;
pi0 = to_next[0] = from[0];
p0 = vlib_get_buffer (vm, pi0);
adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
adj0 = adj_get (adj_index0);
ip0 = vlib_buffer_get_current (p0);
error0 = IP6_ERROR_NONE;
next0 = IP6_REWRITE_NEXT_DROP;
/* Check hop limit */
is_locally_originated0 =
p0->flags & VNET_BUFFER_F_LOCALLY_ORIGINATED;
if (PREDICT_TRUE (!is_locally_originated0))
{
i32 hop_limit0 = ip0->hop_limit;
ASSERT (ip0->hop_limit > 0);
hop_limit0 -= 1;
ip0->hop_limit = hop_limit0;
if (PREDICT_FALSE (hop_limit0 <= 0))
{
/*
* If the hop count drops below 1 when forwarding, generate
* an ICMP response.
*/
error0 = IP6_ERROR_TIME_EXPIRED;
next0 = IP6_REWRITE_NEXT_ICMP_ERROR;
vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded,
ICMP6_time_exceeded_ttl_exceeded_in_transit,
0);
}
}
if (is_midchain)
{
vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
1 /* is_ip6 */ ,
0 /* with gso */ );
}
/* Guess we are only writing on simple Ethernet header. */
vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
/* Update packet buffer attributes/set output interface. */
rw_len0 = adj0[0].rewrite_header.data_bytes;
vnet_buffer (p0)->ip.save_rewrite_length = rw_len0;
if (do_counters)
{
vlib_increment_combined_counter
(&adjacency_counters,
thread_index, adj_index0, 1,
vlib_buffer_length_in_chain (vm, p0) + rw_len0);
}
/* Check MTU of outgoing interface. */
u16 ip0_len =
clib_net_to_host_u16 (ip0->payload_length) +
sizeof (ip6_header_t);
if (p0->flags & VNET_BUFFER_F_GSO)
ip0_len = gso_mtu_sz (p0);
ip6_mtu_check (p0, ip0_len,
adj0[0].rewrite_header.max_l3_packet_bytes,
is_locally_originated0, &next0, is_midchain,
&error0);
/* Don't adjust the buffer for hop count issue; icmp-error node
* wants to see the IP header */
if (PREDICT_TRUE (error0 == IP6_ERROR_NONE))
{
p0->current_data -= rw_len0;
p0->current_length += rw_len0;
tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
next0 = adj0[0].rewrite_header.next_index;
if (PREDICT_FALSE
(adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
vnet_feature_arc_start (lm->output_feature_arc_index,
tx_sw_if_index0, &next0, p0);
}
else
{
p0->error = error_node->errors[error0];
}
if (is_midchain)
{
if (adj0->sub_type.midchain.fixup_func)
adj0->sub_type.midchain.fixup_func
(vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
}
if (is_mcast)
{
vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK,
adj0->
rewrite_header.dst_mcast_offset,
&ip0->dst_address.as_u32[3],
(u8 *) ip0);
}
from += 1;
n_left_from -= 1;
to_next += 1;
n_left_to_next -= 1;
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);
}
/* Need to do trace after rewrites to pick up new packet data. */
if (node->flags & VLIB_NODE_FLAG_TRACE)
ip6_forward_next_trace (vm, node, frame, VLIB_TX);
return frame->n_vectors;
}
always_inline uword
ip6_rewrite_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame,
int do_counters, int is_midchain, int is_mcast)
{
return ip6_rewrite_inline_with_gso (vm, node, frame, do_counters,
is_midchain, is_mcast);
}
VLIB_NODE_FN (ip6_rewrite_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
if (adj_are_counters_enabled ())
return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
else
return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
}
VLIB_NODE_FN (ip6_rewrite_bcast_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
if (adj_are_counters_enabled ())
return ip6_rewrite_inline (vm, node, frame, 1, 0, 0);
else
return ip6_rewrite_inline (vm, node, frame, 0, 0, 0);
}
VLIB_NODE_FN (ip6_rewrite_mcast_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
if (adj_are_counters_enabled ())
return ip6_rewrite_inline (vm, node, frame, 1, 0, 1);
else
return ip6_rewrite_inline (vm, node, frame, 0, 0, 1);
}
VLIB_NODE_FN (ip6_midchain_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
if (adj_are_counters_enabled ())
return ip6_rewrite_inline (vm, node, frame, 1, 1, 0);
else
return ip6_rewrite_inline (vm, node, frame, 0, 1, 0);
}
VLIB_NODE_FN (ip6_mcast_midchain_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
if (adj_are_counters_enabled ())
return ip6_rewrite_inline (vm, node, frame, 1, 1, 1);
else
return ip6_rewrite_inline (vm, node, frame, 0, 1, 1);
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_midchain_node) =
{
.name = "ip6-midchain",
.vector_size = sizeof (u32),
.format_trace = format_ip6_forward_next_trace,
.sibling_of = "ip6-rewrite",
};
VLIB_REGISTER_NODE (ip6_rewrite_node) =
{
.name = "ip6-rewrite",
.vector_size = sizeof (u32),
.format_trace = format_ip6_rewrite_trace,
.n_next_nodes = IP6_REWRITE_N_NEXT,
.next_nodes =
{
[IP6_REWRITE_NEXT_DROP] = "ip6-drop",
[IP6_REWRITE_NEXT_ICMP_ERROR] = "ip6-icmp-error",
[IP6_REWRITE_NEXT_FRAGMENT] = "ip6-frag",
},
};
VLIB_REGISTER_NODE (ip6_rewrite_bcast_node) = {
.name = "ip6-rewrite-bcast",
.vector_size = sizeof (u32),
.format_trace = format_ip6_rewrite_trace,
.sibling_of = "ip6-rewrite",
};
VLIB_REGISTER_NODE (ip6_rewrite_mcast_node) =
{
.name = "ip6-rewrite-mcast",
.vector_size = sizeof (u32),
.format_trace = format_ip6_rewrite_trace,
.sibling_of = "ip6-rewrite",
};
VLIB_REGISTER_NODE (ip6_mcast_midchain_node) =
{
.name = "ip6-mcast-midchain",
.vector_size = sizeof (u32),
.format_trace = format_ip6_rewrite_trace,
.sibling_of = "ip6-rewrite",
};
/* *INDENT-ON* */
/*
* Hop-by-Hop handling
*/
#ifndef CLIB_MARCH_VARIANT
ip6_hop_by_hop_main_t ip6_hop_by_hop_main;
#endif /* CLIB_MARCH_VARIANT */
#define foreach_ip6_hop_by_hop_error \
_(PROCESSED, "pkts with ip6 hop-by-hop options") \
_(FORMAT, "incorrectly formatted hop-by-hop options") \
_(UNKNOWN_OPTION, "unknown ip6 hop-by-hop options")
/* *INDENT-OFF* */
typedef enum
{
#define _(sym,str) IP6_HOP_BY_HOP_ERROR_##sym,
foreach_ip6_hop_by_hop_error
#undef _
IP6_HOP_BY_HOP_N_ERROR,
} ip6_hop_by_hop_error_t;
/* *INDENT-ON* */
/*
* Primary h-b-h handler trace support
* We work pretty hard on the problem for obvious reasons
*/
typedef struct
{
u32 next_index;
u32 trace_len;
u8 option_data[256];
} ip6_hop_by_hop_trace_t;
extern vlib_node_registration_t ip6_hop_by_hop_node;
static char *ip6_hop_by_hop_error_strings[] = {
#define _(sym,string) string,
foreach_ip6_hop_by_hop_error
#undef _
};
#ifndef CLIB_MARCH_VARIANT
u8 *
format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args)
{
ip6_hop_by_hop_header_t *hbh0 = va_arg (*args, ip6_hop_by_hop_header_t *);
int total_len = va_arg (*args, int);
ip6_hop_by_hop_option_t *opt0, *limit0;
ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
u8 type0;
s = format (s, "IP6_HOP_BY_HOP: next protocol %d len %d total %d",
hbh0->protocol, (hbh0->length + 1) << 3, total_len);
opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0 + total_len);
while (opt0 < limit0)
{
type0 = opt0->type;
switch (type0)
{
case 0: /* Pad, just stop */
opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0 + 1);
break;
default:
if (hm->trace[type0])
{
s = (*hm->trace[type0]) (s, opt0);
}
else
{
s =
format (s, "\n unrecognized option %d length %d", type0,
opt0->length);
}
opt0 =
(ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
sizeof (ip6_hop_by_hop_option_t));
break;
}
}
return s;
}
#endif
static u8 *
format_ip6_hop_by_hop_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 *);
ip6_hop_by_hop_trace_t *t = va_arg (*args, ip6_hop_by_hop_trace_t *);
ip6_hop_by_hop_header_t *hbh0;
ip6_hop_by_hop_option_t *opt0, *limit0;
ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
u8 type0;
hbh0 = (ip6_hop_by_hop_header_t *) t->option_data;
s = format (s, "IP6_HOP_BY_HOP: next index %d len %d traced %d",
t->next_index, (hbh0->length + 1) << 3, t->trace_len);
opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
limit0 = (ip6_hop_by_hop_option_t *) ((u8 *) hbh0) + t->trace_len;
while (opt0 < limit0)
{
type0 = opt0->type;
switch (type0)
{
case 0: /* Pad, just stop */
opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
break;
default:
if (hm->trace[type0])
{
s = (*hm->trace[type0]) (s, opt0);
}
else
{
s =
format (s, "\n unrecognized option %d length %d", type0,
opt0->length);
}
opt0 =
(ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
sizeof (ip6_hop_by_hop_option_t));
break;
}
}
return s;
}
always_inline u8
ip6_scan_hbh_options (vlib_buffer_t * b0,
ip6_header_t * ip0,
ip6_hop_by_hop_header_t * hbh0,
ip6_hop_by_hop_option_t * opt0,
ip6_hop_by_hop_option_t * limit0, u32 * next0)
{
ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
u8 type0;
u8 error0 = 0;
while (opt0 < limit0)
{
type0 = opt0->type;
switch (type0)
{
case 0: /* Pad1 */
opt0 = (ip6_hop_by_hop_option_t *) ((u8 *) opt0) + 1;
continue;
case 1: /* PadN */
break;
default:
if (hm->options[type0])
{
if ((*hm->options[type0]) (b0, ip0, opt0) < 0)
{
error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
return (error0);
}
}
else
{
/* Unrecognized mandatory option, check the two high order bits */
switch (opt0->type & HBH_OPTION_TYPE_HIGH_ORDER_BITS)
{
case HBH_OPTION_TYPE_SKIP_UNKNOWN:
break;
case HBH_OPTION_TYPE_DISCARD_UNKNOWN:
error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
*next0 = IP_LOOKUP_NEXT_DROP;
break;
case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP:
error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
*next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
icmp6_error_set_vnet_buffer (b0, ICMP6_parameter_problem,
ICMP6_parameter_problem_unrecognized_option,
(u8 *) opt0 - (u8 *) ip0);
break;
case HBH_OPTION_TYPE_DISCARD_UNKNOWN_ICMP_NOT_MCAST:
error0 = IP6_HOP_BY_HOP_ERROR_UNKNOWN_OPTION;
if (!ip6_address_is_multicast (&ip0->dst_address))
{
*next0 = IP_LOOKUP_NEXT_ICMP_ERROR;
icmp6_error_set_vnet_buffer (b0,
ICMP6_parameter_problem,
ICMP6_parameter_problem_unrecognized_option,
(u8 *) opt0 - (u8 *) ip0);
}
else
{
*next0 = IP_LOOKUP_NEXT_DROP;
}
break;
}
return (error0);
}
}
opt0 =
(ip6_hop_by_hop_option_t *) (((u8 *) opt0) + opt0->length +
sizeof (ip6_hop_by_hop_option_t));
}
return (error0);
}
/*
* Process the Hop-by-Hop Options header
*/
VLIB_NODE_FN (ip6_hop_by_hop_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
vlib_node_runtime_t *error_node =
vlib_node_get_runtime (vm, ip6_hop_by_hop_node.index);
ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
u32 n_left_from, *from, *to_next;
ip_lookup_next_t next_index;
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 >= 4 && n_left_to_next >= 2)
{
u32 bi0, bi1;
vlib_buffer_t *b0, *b1;
u32 next0, next1;
ip6_header_t *ip0, *ip1;
ip6_hop_by_hop_header_t *hbh0, *hbh1;
ip6_hop_by_hop_option_t *opt0, *limit0, *opt1, *limit1;
u8 error0 = 0, error1 = 0;
/* Prefetch next iteration. */
{
vlib_buffer_t *p2, *p3;
p2 = vlib_get_buffer (vm, from[2]);
p3 = vlib_get_buffer (vm, from[3]);
vlib_prefetch_buffer_header (p2, LOAD);
vlib_prefetch_buffer_header (p3, LOAD);
CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
}
/* Speculatively enqueue b0, b1 to the current next frame */
to_next[0] = bi0 = from[0];
to_next[1] = bi1 = from[1];
from += 2;
to_next += 2;
n_left_from -= 2;
n_left_to_next -= 2;
b0 = vlib_get_buffer (vm, bi0);
b1 = vlib_get_buffer (vm, bi1);
/* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
ip_adjacency_t *adj0 = adj_get (adj_index0);
u32 adj_index1 = vnet_buffer (b1)->ip.adj_index[VLIB_TX];
ip_adjacency_t *adj1 = adj_get (adj_index1);
/* Default use the next_index from the adjacency. A HBH option rarely redirects to a different node */
next0 = adj0->lookup_next_index;
next1 = adj1->lookup_next_index;
ip0 = vlib_buffer_get_current (b0);
ip1 = vlib_buffer_get_current (b1);
hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
hbh1 = (ip6_hop_by_hop_header_t *) (ip1 + 1);
opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
opt1 = (ip6_hop_by_hop_option_t *) (hbh1 + 1);
limit0 =
(ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
((hbh0->length + 1) << 3));
limit1 =
(ip6_hop_by_hop_option_t *) ((u8 *) hbh1 +
((hbh1->length + 1) << 3));
/*
* Basic validity checks
*/
if ((hbh0->length + 1) << 3 >
clib_net_to_host_u16 (ip0->payload_length))
{
error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
next0 = IP_LOOKUP_NEXT_DROP;
goto outdual;
}
/* Scan the set of h-b-h options, process ones that we understand */
error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
if ((hbh1->length + 1) << 3 >
clib_net_to_host_u16 (ip1->payload_length))
{
error1 = IP6_HOP_BY_HOP_ERROR_FORMAT;
next1 = IP_LOOKUP_NEXT_DROP;
goto outdual;
}
/* Scan the set of h-b-h options, process ones that we understand */
error1 = ip6_scan_hbh_options (b1, ip1, hbh1, opt1, limit1, &next1);
outdual:
/* Has the classifier flagged this buffer for special treatment? */
if (PREDICT_FALSE
((error0 == 0)
&& (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
next0 = hm->next_override;
/* Has the classifier flagged this buffer for special treatment? */
if (PREDICT_FALSE
((error1 == 0)
&& (vnet_buffer (b1)->l2_classify.opaque_index & OI_DECAP)))
next1 = hm->next_override;
if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
{
if (b0->flags & VLIB_BUFFER_IS_TRACED)
{
ip6_hop_by_hop_trace_t *t =
vlib_add_trace (vm, node, b0, sizeof (*t));
u32 trace_len = (hbh0->length + 1) << 3;
t->next_index = next0;
/* Capture the h-b-h option verbatim */
trace_len =
trace_len <
ARRAY_LEN (t->option_data) ? trace_len :
ARRAY_LEN (t->option_data);
t->trace_len = trace_len;
clib_memcpy_fast (t->option_data, hbh0, trace_len);
}
if (b1->flags & VLIB_BUFFER_IS_TRACED)
{
ip6_hop_by_hop_trace_t *t =
vlib_add_trace (vm, node, b1, sizeof (*t));
u32 trace_len = (hbh1->length + 1) << 3;
t->next_index = next1;
/* Capture the h-b-h option verbatim */
trace_len =
trace_len <
ARRAY_LEN (t->option_data) ? trace_len :
ARRAY_LEN (t->option_data);
t->trace_len = trace_len;
clib_memcpy_fast (t->option_data, hbh1, trace_len);
}
}
b0->error = error_node->errors[error0];
b1->error = error_node->errors[error1];
/* verify speculative enqueue, maybe switch current next frame */
vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
n_left_to_next, bi0, bi1, next0,
next1);
}
while (n_left_from > 0 && n_left_to_next > 0)
{
u32 bi0;
vlib_buffer_t *b0;
u32 next0;
ip6_header_t *ip0;
ip6_hop_by_hop_header_t *hbh0;
ip6_hop_by_hop_option_t *opt0, *limit0;
u8 error0 = 0;
/* 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);
/*
* Default use the next_index from the adjacency.
* A HBH option rarely redirects to a different node
*/
u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
ip_adjacency_t *adj0 = adj_get (adj_index0);
next0 = adj0->lookup_next_index;
ip0 = vlib_buffer_get_current (b0);
hbh0 = (ip6_hop_by_hop_header_t *) (ip0 + 1);
opt0 = (ip6_hop_by_hop_option_t *) (hbh0 + 1);
limit0 =
(ip6_hop_by_hop_option_t *) ((u8 *) hbh0 +
((hbh0->length + 1) << 3));
/*
* Basic validity checks
*/
if ((hbh0->length + 1) << 3 >
clib_net_to_host_u16 (ip0->payload_length))
{
error0 = IP6_HOP_BY_HOP_ERROR_FORMAT;
next0 = IP_LOOKUP_NEXT_DROP;
goto out0;
}
/* Scan the set of h-b-h options, process ones that we understand */
error0 = ip6_scan_hbh_options (b0, ip0, hbh0, opt0, limit0, &next0);
out0:
/* Has the classifier flagged this buffer for special treatment? */
if (PREDICT_FALSE
((error0 == 0)
&& (vnet_buffer (b0)->l2_classify.opaque_index & OI_DECAP)))
next0 = hm->next_override;
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
ip6_hop_by_hop_trace_t *t =
vlib_add_trace (vm, node, b0, sizeof (*t));
u32 trace_len = (hbh0->length + 1) << 3;
t->next_index = next0;
/* Capture the h-b-h option verbatim */
trace_len =
trace_len <
ARRAY_LEN (t->option_data) ? trace_len :
ARRAY_LEN (t->option_data);
t->trace_len = trace_len;
clib_memcpy_fast (t->option_data, hbh0, trace_len);
}
b0->error = error_node->errors[error0];
/* 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;
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_hop_by_hop_node) =
{
.name = "ip6-hop-by-hop",
.sibling_of = "ip6-lookup",
.vector_size = sizeof (u32),
.format_trace = format_ip6_hop_by_hop_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN (ip6_hop_by_hop_error_strings),
.error_strings = ip6_hop_by_hop_error_strings,
.n_next_nodes = 0,
};
/* *INDENT-ON* */
static clib_error_t *
ip6_hop_by_hop_init (vlib_main_t * vm)
{
ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
clib_memset (hm->options, 0, sizeof (hm->options));
clib_memset (hm->trace, 0, sizeof (hm->trace));
hm->next_override = IP6_LOOKUP_NEXT_POP_HOP_BY_HOP;
return (0);
}
VLIB_INIT_FUNCTION (ip6_hop_by_hop_init);
#ifndef CLIB_MARCH_VARIANT
void
ip6_hbh_set_next_override (uword next)
{
ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
hm->next_override = next;
}
int
ip6_hbh_register_option (u8 option,
int options (vlib_buffer_t * b, ip6_header_t * ip,
ip6_hop_by_hop_option_t * opt),
u8 * trace (u8 * s, ip6_hop_by_hop_option_t * opt))
{
ip6_main_t *im = &ip6_main;
ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
ASSERT ((u32) option < ARRAY_LEN (hm->options));
/* Already registered */
if (hm->options[option])
return (-1);
hm->options[option] = options;
hm->trace[option] = trace;
/* Set global variable */
im->hbh_enabled = 1;
return (0);
}
int
ip6_hbh_unregister_option (u8 option)
{
ip6_main_t *im = &ip6_main;
ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main;
ASSERT ((u32) option < ARRAY_LEN (hm->options));
/* Not registered */
if (!hm->options[option])
return (-1);
hm->options[option] = NULL;
hm->trace[option] = NULL;
/* Disable global knob if this was the last option configured */
int i;
bool found = false;
for (i = 0; i < 256; i++)
{
if (hm->options[option])
{
found = true;
break;
}
}
if (!found)
im->hbh_enabled = 0;
return (0);
}
/* Global IP6 main. */
ip6_main_t ip6_main;
#endif
static clib_error_t *
ip6_lookup_init (vlib_main_t * vm)
{
ip6_main_t *im = &ip6_main;
clib_error_t *error;
uword i;
if ((error = vlib_call_init_function (vm, vnet_feature_init)))
return error;
for (i = 0; i < ARRAY_LEN (im->fib_masks); i++)
{
u32 j, i0, i1;
i0 = i / 32;
i1 = i % 32;
for (j = 0; j < i0; j++)
im->fib_masks[i].as_u32[j] = ~0;
if (i1)
im->fib_masks[i].as_u32[i0] =
clib_host_to_net_u32 (pow2_mask (i1) << (32 - i1));
}
ip_lookup_init (&im->lookup_main, /* is_ip6 */ 1);
if (im->lookup_table_nbuckets == 0)
im->lookup_table_nbuckets = IP6_FIB_DEFAULT_HASH_NUM_BUCKETS;
im->lookup_table_nbuckets = 1 << max_log2 (im->lookup_table_nbuckets);
if (im->lookup_table_size == 0)
im->lookup_table_size = IP6_FIB_DEFAULT_HASH_MEMORY_SIZE;
clib_bihash_init_24_8 (&(im->ip6_table[IP6_FIB_TABLE_FWDING].ip6_hash),
"ip6 FIB fwding table",
im->lookup_table_nbuckets, im->lookup_table_size);
clib_bihash_init_24_8 (&im->ip6_table[IP6_FIB_TABLE_NON_FWDING].ip6_hash,
"ip6 FIB non-fwding table",
im->lookup_table_nbuckets, im->lookup_table_size);
clib_bihash_init_40_8 (&im->ip6_mtable.ip6_mhash,
"ip6 mFIB table",
im->lookup_table_nbuckets, im->lookup_table_size);
/* Create FIB with index 0 and table id of 0. */
fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
FIB_SOURCE_DEFAULT_ROUTE);
mfib_table_find_or_create_and_lock (FIB_PROTOCOL_IP6, 0,
MFIB_SOURCE_DEFAULT_ROUTE);
{
pg_node_t *pn;
pn = pg_get_node (ip6_lookup_node.index);
pn->unformat_edit = unformat_pg_ip6_header;
}
/* Unless explicitly configured, don't process HBH options */
im->hbh_enabled = 0;
return error;
}
VLIB_INIT_FUNCTION (ip6_lookup_init);
#ifndef CLIB_MARCH_VARIANT
int
vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
{
u32 fib_index;
fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
if (~0 == fib_index)
return VNET_API_ERROR_NO_SUCH_FIB;
fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
flow_hash_config);
return 0;
}
#endif
static clib_error_t *
set_ip6_flow_hash_command_fn (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
int matched = 0;
u32 table_id = 0;
u32 flow_hash_config = 0;
int rv;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "table %d", &table_id))
matched = 1;
#define _(a,v) \
else if (unformat (input, #a)) { flow_hash_config |= v; matched=1;}
foreach_flow_hash_bit
#undef _
else
break;
}
if (matched == 0)
return clib_error_return (0, "unknown input `%U'",
format_unformat_error, input);
rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
switch (rv)
{
case 0:
break;
case -1:
return clib_error_return (0, "no such FIB table %d", table_id);
default:
clib_warning ("BUG: illegal flow hash config 0x%x", flow_hash_config);
break;
}
return 0;
}
/*?
* Configure the set of IPv6 fields used by the flow hash.
*
* @cliexpar
* @parblock
* Example of how to set the flow hash on a given table:
* @cliexcmd{set ip6 flow-hash table 8 dst sport dport proto}
*
* Example of display the configured flow hash:
* @cliexstart{show ip6 fib}
* ipv6-VRF:0, fib_index 0, flow hash: src dst sport dport proto
* @::/0
* unicast-ip6-chain
* [@0]: dpo-load-balance: [index:5 buckets:1 uRPF:5 to:[0:0]]
* [0] [@0]: dpo-drop ip6
* fe80::/10
* unicast-ip6-chain
* [@0]: dpo-load-balance: [index:10 buckets:1 uRPF:10 to:[0:0]]
* [0] [@2]: dpo-receive
* ff02::1/128
* unicast-ip6-chain
* [@0]: dpo-load-balance: [index:8 buckets:1 uRPF:8 to:[0:0]]
* [0] [@2]: dpo-receive
* ff02::2/128
* unicast-ip6-chain
* [@0]: dpo-load-balance: [index:7 buckets:1 uRPF:7 to:[0:0]]
* [0] [@2]: dpo-receive
* ff02::16/128
* unicast-ip6-chain
* [@0]: dpo-load-balance: [index:9 buckets:1 uRPF:9 to:[0:0]]
* [0] [@2]: dpo-receive
* ff02::1:ff00:0/104
* unicast-ip6-chain
* [@0]: dpo-load-balance: [index:6 buckets:1 uRPF:6 to:[0:0]]
* [0] [@2]: dpo-receive
* ipv6-VRF:8, fib_index 1, flow hash: dst sport dport proto
* @::/0
* unicast-ip6-chain
* [@0]: dpo-load-balance: [index:21 buckets:1 uRPF:20 to:[0:0]]
* [0] [@0]: dpo-drop ip6
* @::a:1:1:0:4/126
* unicast-ip6-chain
* [@0]: dpo-load-balance: [index:27 buckets:1 uRPF:26 to:[0:0]]
* [0] [@4]: ipv6-glean: af_packet0
* @::a:1:1:0:7/128
* unicast-ip6-chain
* [@0]: dpo-load-balance: [index:28 buckets:1 uRPF:27 to:[0:0]]
* [0] [@2]: dpo-receive: @::a:1:1:0:7 on af_packet0
* fe80::/10
* unicast-ip6-chain
* [@0]: dpo-load-balance: [index:26 buckets:1 uRPF:25 to:[0:0]]
* [0] [@2]: dpo-receive
* fe80::fe:3eff:fe3e:9222/128
* unicast-ip6-chain
* [@0]: dpo-load-balance: [index:29 buckets:1 uRPF:28 to:[0:0]]
* [0] [@2]: dpo-receive: fe80::fe:3eff:fe3e:9222 on af_packet0
* ff02::1/128
* unicast-ip6-chain
* [@0]: dpo-load-balance: [index:24 buckets:1 uRPF:23 to:[0:0]]
* [0] [@2]: dpo-receive
* ff02::2/128
* unicast-ip6-chain
* [@0]: dpo-load-balance: [index:23 buckets:1 uRPF:22 to:[0:0]]
* [0] [@2]: dpo-receive
* ff02::16/128
* unicast-ip6-chain
* [@0]: dpo-load-balance: [index:25 buckets:1 uRPF:24 to:[0:0]]
* [0] [@2]: dpo-receive
* ff02::1:ff00:0/104
* unicast-ip6-chain
* [@0]: dpo-load-balance: [index:22 buckets:1 uRPF:21 to:[0:0]]
* [0] [@2]: dpo-receive
* @cliexend
* @endparblock
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (set_ip6_flow_hash_command, static) =
{
.path = "set ip6 flow-hash",
.short_help =
"set ip6 flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
.function = set_ip6_flow_hash_command_fn,
};
/* *INDENT-ON* */
static clib_error_t *
show_ip6_local_command_fn (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
ip6_main_t *im = &ip6_main;
ip_lookup_main_t *lm = &im->lookup_main;
int i;
vlib_cli_output (vm, "Protocols handled by ip6_local");
for (i = 0; i < ARRAY_LEN (lm->local_next_by_ip_protocol); i++)
{
if (lm->local_next_by_ip_protocol[i] != IP_LOCAL_NEXT_PUNT)
{
u32 node_index = vlib_get_node (vm,
ip6_local_node.index)->
next_nodes[lm->local_next_by_ip_protocol[i]];
vlib_cli_output (vm, "%d: %U", i, format_vlib_node_name, vm,
node_index);
}
}
return 0;
}
/*?
* Display the set of protocols handled by the local IPv6 stack.
*
* @cliexpar
* Example of how to display local protocol table:
* @cliexstart{show ip6 local}
* Protocols handled by ip6_local
* 17
* 43
* 58
* 115
* @cliexend
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (show_ip6_local, static) =
{
.path = "show ip6 local",
.function = show_ip6_local_command_fn,
.short_help = "show ip6 local",
};
/* *INDENT-ON* */
#ifndef CLIB_MARCH_VARIANT
int
vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
u32 table_index)
{
vnet_main_t *vnm = vnet_get_main ();
vnet_interface_main_t *im = &vnm->interface_main;
ip6_main_t *ipm = &ip6_main;
ip_lookup_main_t *lm = &ipm->lookup_main;
vnet_classify_main_t *cm = &vnet_classify_main;
ip6_address_t *if_addr;
if (pool_is_free_index (im->sw_interfaces, sw_if_index))
return VNET_API_ERROR_NO_MATCHING_INTERFACE;
if (table_index != ~0 && pool_is_free_index (cm->tables, table_index))
return VNET_API_ERROR_NO_SUCH_ENTRY;
vec_validate (lm->classify_table_index_by_sw_if_index, sw_if_index);
lm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
if_addr = ip6_interface_first_address (ipm, sw_if_index);
if (NULL != if_addr)
{
fib_prefix_t pfx = {
.fp_len = 128,
.fp_proto = FIB_PROTOCOL_IP6,
.fp_addr.ip6 = *if_addr,
};
u32 fib_index;
fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
sw_if_index);
if (table_index != (u32) ~ 0)
{
dpo_id_t dpo = DPO_INVALID;
dpo_set (&dpo,
DPO_CLASSIFY,
DPO_PROTO_IP6,
classify_dpo_create (DPO_PROTO_IP6, table_index));
fib_table_entry_special_dpo_add (fib_index,
&pfx,
FIB_SOURCE_CLASSIFY,
FIB_ENTRY_FLAG_NONE, &dpo);
dpo_reset (&dpo);
}
else
{
fib_table_entry_special_remove (fib_index,
&pfx, FIB_SOURCE_CLASSIFY);
}
}
return 0;
}
#endif
static clib_error_t *
set_ip6_classify_command_fn (vlib_main_t * vm,
unformat_input_t * input,
vlib_cli_command_t * cmd)
{
u32 table_index = ~0;
int table_index_set = 0;
u32 sw_if_index = ~0;
int rv;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "table-index %d", &table_index))
table_index_set = 1;
else if (unformat (input, "intfc %U", unformat_vnet_sw_interface,
vnet_get_main (), &sw_if_index))
;
else
break;
}
if (table_index_set == 0)
return clib_error_return (0, "classify table-index must be specified");
if (sw_if_index == ~0)
return clib_error_return (0, "interface / subif must be specified");
rv = vnet_set_ip6_classify_intfc (vm, sw_if_index, table_index);
switch (rv)
{
case 0:
break;
case VNET_API_ERROR_NO_MATCHING_INTERFACE:
return clib_error_return (0, "No such interface");
case VNET_API_ERROR_NO_SUCH_ENTRY:
return clib_error_return (0, "No such classifier table");
}
return 0;
}
/*?
* Assign a classification table to an interface. The classification
* table is created using the '<em>classify table</em>' and '<em>classify session</em>'
* commands. Once the table is create, use this command to filter packets
* on an interface.
*
* @cliexpar
* Example of how to assign a classification table to an interface:
* @cliexcmd{set ip6 classify intfc GigabitEthernet2/0/0 table-index 1}
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (set_ip6_classify_command, static) =
{
.path = "set ip6 classify",
.short_help =
"set ip6 classify intfc <interface> table-index <classify-idx>",
.function = set_ip6_classify_command_fn,
};
/* *INDENT-ON* */
static clib_error_t *
ip6_config (vlib_main_t * vm, unformat_input_t * input)
{
ip6_main_t *im = &ip6_main;
uword heapsize = 0;
u32 tmp;
u32 nbuckets = 0;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "hash-buckets %d", &tmp))
nbuckets = tmp;
else if (unformat (input, "heap-size %U",
unformat_memory_size, &heapsize))
;
else
return clib_error_return (0, "unknown input '%U'",
format_unformat_error, input);
}
im->lookup_table_nbuckets = nbuckets;
im->lookup_table_size = heapsize;
return 0;
}
VLIB_EARLY_CONFIG_FUNCTION (ip6_config, "ip6");
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/