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|
/*
* Copyright (c) 2017 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file
* @brief NAT plugin virtual fragmentation reassembly
*/
#include <vnet/vnet.h>
#include <nat/nat_reass.h>
#include <nat/nat_ipfix_logging.h>
nat_reass_main_t nat_reass_main;
static u32
nat_reass_get_nbuckets (u8 is_ip6)
{
nat_reass_main_t *srm = &nat_reass_main;
u32 nbuckets;
u8 i;
if (is_ip6)
nbuckets = (u32) (srm->ip6_max_reass / NAT_REASS_HT_LOAD_FACTOR);
else
nbuckets = (u32) (srm->ip4_max_reass / NAT_REASS_HT_LOAD_FACTOR);
for (i = 0; i < 31; i++)
if ((1 << i) >= nbuckets)
break;
nbuckets = 1 << i;
return nbuckets;
}
static_always_inline void
nat_ip4_reass_get_frags_inline (nat_reass_ip4_t * reass, u32 ** bi)
{
nat_reass_main_t *srm = &nat_reass_main;
u32 elt_index;
dlist_elt_t *elt;
while ((elt_index =
clib_dlist_remove_head (srm->ip4_frags_list_pool,
reass->frags_per_reass_list_head_index)) !=
~0)
{
elt = pool_elt_at_index (srm->ip4_frags_list_pool, elt_index);
vec_add1 (*bi, elt->value);
reass->frag_n--;
pool_put_index (srm->ip4_frags_list_pool, elt_index);
}
}
static_always_inline void
nat_ip6_reass_get_frags_inline (nat_reass_ip6_t * reass, u32 ** bi)
{
nat_reass_main_t *srm = &nat_reass_main;
u32 elt_index;
dlist_elt_t *elt;
while ((elt_index =
clib_dlist_remove_head (srm->ip6_frags_list_pool,
reass->frags_per_reass_list_head_index)) !=
~0)
{
elt = pool_elt_at_index (srm->ip6_frags_list_pool, elt_index);
vec_add1 (*bi, elt->value);
reass->frag_n--;
pool_put_index (srm->ip6_frags_list_pool, elt_index);
}
}
int
nat_reass_set (u32 timeout, u16 max_reass, u8 max_frag, u8 drop_frag,
u8 is_ip6)
{
nat_reass_main_t *srm = &nat_reass_main;
u32 nbuckets;
if (is_ip6)
{
if (srm->ip6_max_reass != max_reass)
{
clib_spinlock_lock_if_init (&srm->ip6_reass_lock);
srm->ip6_max_reass = max_reass;
pool_free (srm->ip6_reass_pool);
pool_alloc (srm->ip6_reass_pool, srm->ip4_max_reass);
nbuckets = nat_reass_get_nbuckets (0);
clib_bihash_free_48_8 (&srm->ip6_reass_hash);
clib_bihash_init_48_8 (&srm->ip6_reass_hash, "nat-ip6-reass",
nbuckets, nbuckets * 1024);
clib_spinlock_unlock_if_init (&srm->ip6_reass_lock);
}
srm->ip6_timeout = timeout;
srm->ip6_max_frag = max_frag;
srm->ip6_drop_frag = drop_frag;
}
else
{
if (srm->ip4_max_reass != max_reass)
{
clib_spinlock_lock_if_init (&srm->ip4_reass_lock);
srm->ip4_max_reass = max_reass;
pool_free (srm->ip4_reass_pool);
pool_alloc (srm->ip4_reass_pool, srm->ip4_max_reass);
nbuckets = nat_reass_get_nbuckets (0);
clib_bihash_free_16_8 (&srm->ip4_reass_hash);
clib_bihash_init_16_8 (&srm->ip4_reass_hash, "nat-ip4-reass",
nbuckets, nbuckets * 1024);
clib_spinlock_unlock_if_init (&srm->ip4_reass_lock);
}
srm->ip4_timeout = timeout;
srm->ip4_max_frag = max_frag;
srm->ip4_drop_frag = drop_frag;
}
return 0;
}
u32
nat_reass_get_timeout (u8 is_ip6)
{
nat_reass_main_t *srm = &nat_reass_main;
if (is_ip6)
return srm->ip6_timeout;
return srm->ip4_timeout;
}
u16
nat_reass_get_max_reass (u8 is_ip6)
{
nat_reass_main_t *srm = &nat_reass_main;
if (is_ip6)
return srm->ip6_max_reass;
return srm->ip4_max_reass;
}
u8
nat_reass_get_max_frag (u8 is_ip6)
{
nat_reass_main_t *srm = &nat_reass_main;
if (is_ip6)
return srm->ip6_max_frag;
return srm->ip4_max_frag;
}
u8
nat_reass_is_drop_frag (u8 is_ip6)
{
nat_reass_main_t *srm = &nat_reass_main;
if (is_ip6)
return srm->ip6_drop_frag;
return srm->ip4_drop_frag;
}
static_always_inline nat_reass_ip4_t *
nat_ip4_reass_lookup (nat_reass_ip4_key_t * k, f64 now)
{
nat_reass_main_t *srm = &nat_reass_main;
clib_bihash_kv_16_8_t kv, value;
nat_reass_ip4_t *reass;
kv.key[0] = k->as_u64[0];
kv.key[1] = k->as_u64[1];
if (clib_bihash_search_16_8 (&srm->ip4_reass_hash, &kv, &value))
return 0;
reass = pool_elt_at_index (srm->ip4_reass_pool, value.value);
if (now < reass->last_heard + (f64) srm->ip4_timeout)
return reass;
return 0;
}
nat_reass_ip4_t *
nat_ip4_reass_find (ip4_address_t src, ip4_address_t dst, u16 frag_id,
u8 proto)
{
nat_reass_main_t *srm = &nat_reass_main;
nat_reass_ip4_t *reass = 0;
nat_reass_ip4_key_t k;
f64 now = vlib_time_now (srm->vlib_main);
k.src.as_u32 = src.as_u32;
k.dst.as_u32 = dst.as_u32;
k.frag_id = frag_id;
k.proto = proto;
clib_spinlock_lock_if_init (&srm->ip4_reass_lock);
reass = nat_ip4_reass_lookup (&k, now);
clib_spinlock_unlock_if_init (&srm->ip4_reass_lock);
return reass;
}
nat_reass_ip4_t *
nat_ip4_reass_find_or_create (ip4_address_t src, ip4_address_t dst,
u16 frag_id, u8 proto, u8 reset_timeout,
u32 ** bi_to_drop)
{
nat_reass_main_t *srm = &nat_reass_main;
nat_reass_ip4_t *reass = 0;
nat_reass_ip4_key_t k;
f64 now = vlib_time_now (srm->vlib_main);
dlist_elt_t *oldest_elt, *elt;
dlist_elt_t *per_reass_list_head_elt;
u32 oldest_index, elt_index;
clib_bihash_kv_16_8_t kv, value;
k.src.as_u32 = src.as_u32;
k.dst.as_u32 = dst.as_u32;
k.frag_id = frag_id;
k.proto = proto;
clib_spinlock_lock_if_init (&srm->ip4_reass_lock);
reass = nat_ip4_reass_lookup (&k, now);
if (reass)
{
if (reset_timeout)
{
reass->last_heard = now;
clib_dlist_remove (srm->ip4_reass_lru_list_pool,
reass->lru_list_index);
clib_dlist_addtail (srm->ip4_reass_lru_list_pool,
srm->ip4_reass_head_index,
reass->lru_list_index);
}
if (reass->flags & NAT_REASS_FLAG_MAX_FRAG_DROP)
{
reass = 0;
goto unlock;
}
goto unlock;
}
if (srm->ip4_reass_n >= srm->ip4_max_reass)
{
oldest_index =
clib_dlist_remove_head (srm->ip4_reass_lru_list_pool,
srm->ip4_reass_head_index);
ASSERT (oldest_index != ~0);
oldest_elt =
pool_elt_at_index (srm->ip4_reass_lru_list_pool, oldest_index);
reass = pool_elt_at_index (srm->ip4_reass_pool, oldest_elt->value);
if (now < reass->last_heard + (f64) srm->ip4_timeout)
{
clib_dlist_addhead (srm->ip4_reass_lru_list_pool,
srm->ip4_reass_head_index, oldest_index);
clib_warning ("no free resassembly slot");
reass = 0;
goto unlock;
}
clib_dlist_addtail (srm->ip4_reass_lru_list_pool,
srm->ip4_reass_head_index, oldest_index);
kv.key[0] = reass->key.as_u64[0];
kv.key[1] = reass->key.as_u64[1];
if (!clib_bihash_search_16_8 (&srm->ip4_reass_hash, &kv, &value))
{
if (value.value == (reass - srm->ip4_reass_pool))
{
if (clib_bihash_add_del_16_8 (&srm->ip4_reass_hash, &kv, 0))
{
reass = 0;
goto unlock;
}
}
}
nat_ip4_reass_get_frags_inline (reass, bi_to_drop);
}
else
{
pool_get (srm->ip4_reass_pool, reass);
pool_get (srm->ip4_reass_lru_list_pool, elt);
reass->lru_list_index = elt_index = elt - srm->ip4_reass_lru_list_pool;
clib_dlist_init (srm->ip4_reass_lru_list_pool, elt_index);
elt->value = reass - srm->ip4_reass_pool;
clib_dlist_addtail (srm->ip4_reass_lru_list_pool,
srm->ip4_reass_head_index, elt_index);
pool_get (srm->ip4_frags_list_pool, per_reass_list_head_elt);
reass->frags_per_reass_list_head_index =
per_reass_list_head_elt - srm->ip4_frags_list_pool;
clib_dlist_init (srm->ip4_frags_list_pool,
reass->frags_per_reass_list_head_index);
srm->ip4_reass_n++;
}
reass->key.as_u64[0] = kv.key[0] = k.as_u64[0];
reass->key.as_u64[1] = kv.key[1] = k.as_u64[1];
kv.value = reass - srm->ip4_reass_pool;
reass->sess_index = (u32) ~ 0;
reass->thread_index = (u32) ~ 0;
reass->last_heard = now;
reass->frag_n = 0;
reass->flags = 0;
reass->classify_next = NAT_REASS_IP4_CLASSIFY_NONE;
if (clib_bihash_add_del_16_8 (&srm->ip4_reass_hash, &kv, 1))
{
reass = 0;
goto unlock;
}
unlock:
clib_spinlock_unlock_if_init (&srm->ip4_reass_lock);
return reass;
}
int
nat_ip4_reass_add_fragment (nat_reass_ip4_t * reass, u32 bi,
u32 ** bi_to_drop)
{
nat_reass_main_t *srm = &nat_reass_main;
dlist_elt_t *elt;
u32 elt_index;
if (reass->frag_n >= srm->ip4_max_frag)
{
nat_ipfix_logging_max_fragments_ip4 (srm->ip4_max_frag,
&reass->key.src);
reass->flags |= NAT_REASS_FLAG_MAX_FRAG_DROP;
nat_ip4_reass_get_frags_inline (reass, bi_to_drop);
return -1;
}
clib_spinlock_lock_if_init (&srm->ip4_reass_lock);
pool_get (srm->ip4_frags_list_pool, elt);
elt_index = elt - srm->ip4_frags_list_pool;
clib_dlist_init (srm->ip4_frags_list_pool, elt_index);
elt->value = bi;
clib_dlist_addtail (srm->ip4_frags_list_pool,
reass->frags_per_reass_list_head_index, elt_index);
reass->frag_n++;
clib_spinlock_unlock_if_init (&srm->ip4_reass_lock);
return 0;
}
void
nat_ip4_reass_get_frags (nat_reass_ip4_t * reass, u32 ** bi)
{
nat_reass_main_t *srm = &nat_reass_main;
clib_spinlock_lock_if_init (&srm->ip4_reass_lock);
nat_ip4_reass_get_frags_inline (reass, bi);
clib_spinlock_unlock_if_init (&srm->ip4_reass_lock);
}
void
nat_ip4_reass_walk (nat_ip4_reass_walk_fn_t fn, void *ctx)
{
nat_reass_ip4_t *reass;
nat_reass_main_t *srm = &nat_reass_main;
f64 now = vlib_time_now (srm->vlib_main);
/* *INDENT-OFF* */
pool_foreach (reass, srm->ip4_reass_pool,
({
if (now < reass->last_heard + (f64) srm->ip4_timeout)
{
if (fn (reass, ctx))
return;
}
}));
/* *INDENT-ON* */
}
static_always_inline nat_reass_ip6_t *
nat_ip6_reass_lookup (nat_reass_ip6_key_t * k, f64 now)
{
nat_reass_main_t *srm = &nat_reass_main;
clib_bihash_kv_48_8_t kv, value;
nat_reass_ip6_t *reass;
k->unused = 0;
kv.key[0] = k->as_u64[0];
kv.key[1] = k->as_u64[1];
kv.key[2] = k->as_u64[2];
kv.key[3] = k->as_u64[3];
kv.key[4] = k->as_u64[4];
kv.key[5] = k->as_u64[5];
if (clib_bihash_search_48_8 (&srm->ip6_reass_hash, &kv, &value))
return 0;
reass = pool_elt_at_index (srm->ip6_reass_pool, value.value);
if (now < reass->last_heard + (f64) srm->ip6_timeout)
return reass;
return 0;
}
nat_reass_ip6_t *
nat_ip6_reass_find_or_create (ip6_address_t src, ip6_address_t dst,
u32 frag_id, u8 proto, u8 reset_timeout,
u32 ** bi_to_drop)
{
nat_reass_main_t *srm = &nat_reass_main;
nat_reass_ip6_t *reass = 0;
nat_reass_ip6_key_t k;
f64 now = vlib_time_now (srm->vlib_main);
dlist_elt_t *oldest_elt, *elt;
dlist_elt_t *per_reass_list_head_elt;
u32 oldest_index, elt_index;
clib_bihash_kv_48_8_t kv;
k.src.as_u64[0] = src.as_u64[0];
k.src.as_u64[1] = src.as_u64[1];
k.dst.as_u64[0] = dst.as_u64[0];
k.dst.as_u64[1] = dst.as_u64[1];
k.frag_id = frag_id;
k.proto = proto;
k.unused = 0;
clib_spinlock_lock_if_init (&srm->ip6_reass_lock);
reass = nat_ip6_reass_lookup (&k, now);
if (reass)
{
if (reset_timeout)
{
reass->last_heard = now;
clib_dlist_remove (srm->ip6_reass_lru_list_pool,
reass->lru_list_index);
clib_dlist_addtail (srm->ip6_reass_lru_list_pool,
srm->ip6_reass_head_index,
reass->lru_list_index);
}
if (reass->flags & NAT_REASS_FLAG_MAX_FRAG_DROP)
{
reass = 0;
goto unlock;
}
goto unlock;
}
if (srm->ip6_reass_n >= srm->ip6_max_reass)
{
oldest_index =
clib_dlist_remove_head (srm->ip6_reass_lru_list_pool,
srm->ip6_reass_head_index);
ASSERT (oldest_index != ~0);
oldest_elt =
pool_elt_at_index (srm->ip4_reass_lru_list_pool, oldest_index);
reass = pool_elt_at_index (srm->ip6_reass_pool, oldest_elt->value);
if (now < reass->last_heard + (f64) srm->ip6_timeout)
{
clib_dlist_addhead (srm->ip6_reass_lru_list_pool,
srm->ip6_reass_head_index, oldest_index);
clib_warning ("no free resassembly slot");
reass = 0;
goto unlock;
}
clib_dlist_addtail (srm->ip6_reass_lru_list_pool,
srm->ip6_reass_head_index, oldest_index);
kv.key[0] = k.as_u64[0];
kv.key[1] = k.as_u64[1];
kv.key[2] = k.as_u64[2];
kv.key[3] = k.as_u64[4];
kv.key[4] = k.as_u64[5];
if (clib_bihash_add_del_48_8 (&srm->ip6_reass_hash, &kv, 0))
{
reass = 0;
goto unlock;
}
nat_ip6_reass_get_frags_inline (reass, bi_to_drop);
}
else
{
pool_get (srm->ip6_reass_pool, reass);
pool_get (srm->ip6_reass_lru_list_pool, elt);
reass->lru_list_index = elt_index = elt - srm->ip6_reass_lru_list_pool;
clib_dlist_init (srm->ip6_reass_lru_list_pool, elt_index);
elt->value = reass - srm->ip6_reass_pool;
clib_dlist_addtail (srm->ip6_reass_lru_list_pool,
srm->ip6_reass_head_index, elt_index);
pool_get (srm->ip6_frags_list_pool, per_reass_list_head_elt);
reass->frags_per_reass_list_head_index =
per_reass_list_head_elt - srm->ip6_frags_list_pool;
clib_dlist_init (srm->ip6_frags_list_pool,
reass->frags_per_reass_list_head_index);
srm->ip6_reass_n++;
}
reass->key.as_u64[0] = kv.key[0] = k.as_u64[0];
reass->key.as_u64[1] = kv.key[1] = k.as_u64[1];
reass->key.as_u64[2] = kv.key[2] = k.as_u64[2];
reass->key.as_u64[3] = kv.key[3] = k.as_u64[3];
reass->key.as_u64[4] = kv.key[4] = k.as_u64[4];
reass->key.as_u64[5] = kv.key[5] = k.as_u64[5];
kv.value = reass - srm->ip6_reass_pool;
reass->sess_index = (u32) ~ 0;
reass->last_heard = now;
if (clib_bihash_add_del_48_8 (&srm->ip6_reass_hash, &kv, 1))
{
reass = 0;
goto unlock;
}
unlock:
clib_spinlock_unlock_if_init (&srm->ip6_reass_lock);
return reass;
}
int
nat_ip6_reass_add_fragment (nat_reass_ip6_t * reass, u32 bi,
u32 ** bi_to_drop)
{
nat_reass_main_t *srm = &nat_reass_main;
dlist_elt_t *elt;
u32 elt_index;
if (reass->frag_n >= srm->ip6_max_frag)
{
nat_ipfix_logging_max_fragments_ip6 (srm->ip6_max_frag,
&reass->key.src);
reass->flags |= NAT_REASS_FLAG_MAX_FRAG_DROP;
nat_ip6_reass_get_frags_inline (reass, bi_to_drop);
return -1;
}
clib_spinlock_lock_if_init (&srm->ip6_reass_lock);
pool_get (srm->ip6_frags_list_pool, elt);
elt_index = elt - srm->ip6_frags_list_pool;
clib_dlist_init (srm->ip6_frags_list_pool, elt_index);
elt->value = bi;
clib_dlist_addtail (srm->ip6_frags_list_pool,
reass->frags_per_reass_list_head_index, elt_index);
reass->frag_n++;
clib_spinlock_unlock_if_init (&srm->ip6_reass_lock);
return 0;
}
void
nat_ip6_reass_get_frags (nat_reass_ip6_t * reass, u32 ** bi)
{
nat_reass_main_t *srm = &nat_reass_main;
clib_spinlock_lock_if_init (&srm->ip6_reass_lock);
nat_ip6_reass_get_frags_inline (reass, bi);
clib_spinlock_unlock_if_init (&srm->ip6_reass_lock);
}
void
nat_ip6_reass_walk (nat_ip6_reass_walk_fn_t fn, void *ctx)
{
nat_reass_ip6_t *reass;
nat_reass_main_t *srm = &nat_reass_main;
f64 now = vlib_time_now (srm->vlib_main);
/* *INDENT-OFF* */
pool_foreach (reass, srm->ip6_reass_pool,
({
if (now < reass->last_heard + (f64) srm->ip4_timeout)
{
if (fn (reass, ctx))
return;
}
}));
/* *INDENT-ON* */
}
clib_error_t *
nat_reass_init (vlib_main_t * vm)
{
nat_reass_main_t *srm = &nat_reass_main;
vlib_thread_main_t *tm = vlib_get_thread_main ();
clib_error_t *error = 0;
dlist_elt_t *head;
u32 nbuckets, head_index;
srm->vlib_main = vm;
srm->vnet_main = vnet_get_main ();
/* IPv4 */
srm->ip4_timeout = NAT_REASS_TIMEOUT_DEFAULT;
srm->ip4_max_reass = NAT_MAX_REASS_DEAFULT;
srm->ip4_max_frag = NAT_MAX_FRAG_DEFAULT;
srm->ip4_drop_frag = 0;
srm->ip4_reass_n = 0;
if (tm->n_vlib_mains > 1)
clib_spinlock_init (&srm->ip4_reass_lock);
pool_alloc (srm->ip4_reass_pool, srm->ip4_max_reass);
nbuckets = nat_reass_get_nbuckets (0);
clib_bihash_init_16_8 (&srm->ip4_reass_hash, "nat-ip4-reass", nbuckets,
nbuckets * 1024);
pool_get (srm->ip4_reass_lru_list_pool, head);
srm->ip4_reass_head_index = head_index =
head - srm->ip4_reass_lru_list_pool;
clib_dlist_init (srm->ip4_reass_lru_list_pool, head_index);
/* IPv6 */
srm->ip6_timeout = NAT_REASS_TIMEOUT_DEFAULT;
srm->ip6_max_reass = NAT_MAX_REASS_DEAFULT;
srm->ip6_max_frag = NAT_MAX_FRAG_DEFAULT;
srm->ip6_drop_frag = 0;
srm->ip6_reass_n = 0;
if (tm->n_vlib_mains > 1)
clib_spinlock_init (&srm->ip6_reass_lock);
pool_alloc (srm->ip6_reass_pool, srm->ip6_max_reass);
nbuckets = nat_reass_get_nbuckets (1);
clib_bihash_init_48_8 (&srm->ip6_reass_hash, "nat-ip6-reass", nbuckets,
nbuckets * 1024);
pool_get (srm->ip6_reass_lru_list_pool, head);
srm->ip6_reass_head_index = head_index =
head - srm->ip6_reass_lru_list_pool;
clib_dlist_init (srm->ip6_reass_lru_list_pool, head_index);
return error;
}
static clib_error_t *
nat_reass_command_fn (vlib_main_t * vm, unformat_input_t * input,
vlib_cli_command_t * cmd)
{
clib_error_t *error = 0;
unformat_input_t _line_input, *line_input = &_line_input;
u32 timeout = 0, max_reass = 0, max_frag = 0;
u8 drop_frag = (u8) ~ 0, is_ip6 = 0;
int rv;
/* Get a line of input. */
if (!unformat_user (input, unformat_line_input, line_input))
return 0;
while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (line_input, "max-reassemblies %u", &max_reass))
;
else if (unformat (line_input, "max-fragments %u", &max_frag))
;
else if (unformat (line_input, "timeout %u", &timeout))
;
else if (unformat (line_input, "enable"))
drop_frag = 0;
else if (unformat (line_input, "disable"))
drop_frag = 1;
else if (unformat (line_input, "ip4"))
is_ip6 = 0;
else if (unformat (line_input, "ip6"))
is_ip6 = 1;
else
{
error = clib_error_return (0, "unknown input '%U'",
format_unformat_error, line_input);
goto done;
}
}
if (!timeout)
timeout = nat_reass_get_timeout (is_ip6);
if (!max_reass)
max_reass = nat_reass_get_max_reass (is_ip6);
if (!max_frag)
max_frag = nat_reass_get_max_frag (is_ip6);
if (drop_frag == (u8) ~ 0)
drop_frag = nat_reass_is_drop_frag (is_ip6);
rv =
nat_reass_set (timeout, (u16) max_reass, (u8) max_frag, drop_frag,
is_ip6);
if (rv)
{
error = clib_error_return (0, "nat_set_reass return %d", rv);
goto done;
}
done:
unformat_free (line_input);
return error;
}
static int
nat_ip4_reass_walk_cli (nat_reass_ip4_t * reass, void *ctx)
{
vlib_main_t *vm = ctx;
u8 *flags_str = 0;
const char *classify_next_str;
if (reass->flags & NAT_REASS_FLAG_MAX_FRAG_DROP)
flags_str = format (flags_str, "MAX_FRAG_DROP");
if (reass->flags & NAT_REASS_FLAG_CLASSIFY_ED_CONTINUE)
{
if (flags_str)
flags_str = format (flags_str, " | ");
flags_str = format (flags_str, "CLASSIFY_ED_CONTINUE");
}
if (reass->flags & NAT_REASS_FLAG_ED_DONT_TRANSLATE)
{
if (flags_str)
flags_str = format (flags_str, " | ");
flags_str = format (flags_str, "CLASSIFY_ED_DONT_TRANSLATE");
}
if (!flags_str)
flags_str = format (flags_str, "0");
flags_str = format (flags_str, "%c", 0);
switch (reass->classify_next)
{
case NAT_REASS_IP4_CLASSIFY_NONE:
classify_next_str = "NONE";
break;
case NAT_REASS_IP4_CLASSIFY_NEXT_IN2OUT:
classify_next_str = "IN2OUT";
break;
case NAT_REASS_IP4_CLASSIFY_NEXT_OUT2IN:
classify_next_str = "OUT2IN";
break;
default:
classify_next_str = "invalid value";
}
vlib_cli_output (vm, " src %U dst %U proto %u id 0x%04x cached %u "
"flags %s classify_next %s",
format_ip4_address, &reass->key.src,
format_ip4_address, &reass->key.dst,
reass->key.proto,
clib_net_to_host_u16 (reass->key.frag_id), reass->frag_n,
flags_str, classify_next_str);
vec_free (flags_str);
return 0;
}
static int
nat_ip6_reass_walk_cli (nat_reass_ip6_t * reass, void *ctx)
{
vlib_main_t *vm = ctx;
vlib_cli_output (vm, " src %U dst %U proto %u id 0x%08x cached %u",
format_ip6_address, &reass->key.src,
format_ip6_address, &reass->key.dst,
reass->key.proto,
clib_net_to_host_u32 (reass->key.frag_id), reass->frag_n);
return 0;
}
static clib_error_t *
show_nat_reass_command_fn (vlib_main_t * vm, unformat_input_t * input,
vlib_cli_command_t * cmd)
{
vlib_cli_output (vm, "NAT IPv4 virtual fragmentation reassembly is %s",
nat_reass_is_drop_frag (0) ? "DISABLED" : "ENABLED");
vlib_cli_output (vm, " max-reassemblies %u", nat_reass_get_max_reass (0));
vlib_cli_output (vm, " max-fragments %u", nat_reass_get_max_frag (0));
vlib_cli_output (vm, " timeout %usec", nat_reass_get_timeout (0));
vlib_cli_output (vm, " reassemblies:");
nat_ip4_reass_walk (nat_ip4_reass_walk_cli, vm);
vlib_cli_output (vm, "NAT IPv6 virtual fragmentation reassembly is %s",
nat_reass_is_drop_frag (1) ? "DISABLED" : "ENABLED");
vlib_cli_output (vm, " max-reassemblies %u", nat_reass_get_max_reass (1));
vlib_cli_output (vm, " max-fragments %u", nat_reass_get_max_frag (1));
vlib_cli_output (vm, " timeout %usec", nat_reass_get_timeout (1));
vlib_cli_output (vm, " reassemblies:");
nat_ip6_reass_walk (nat_ip6_reass_walk_cli, vm);
return 0;
}
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (nat_reass_command, static) =
{
.path = "nat virtual-reassembly",
.short_help = "nat virtual-reassembly ip4|ip6 [max-reassemblies <n>] "
"[max-fragments <n>] [timeout <sec>] [enable|disable]",
.function = nat_reass_command_fn,
};
VLIB_CLI_COMMAND (show_nat_reass_command, static) =
{
.path = "show nat virtual-reassembly",
.short_help = "show nat virtual-reassembly",
.function = show_nat_reass_command_fn,
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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