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-rw-r--r--src/plugins/nat/in2out_ed.c301
-rwxr-xr-xsrc/plugins/nat/nat.c85
-rw-r--r--src/plugins/nat/nat.h25
-rw-r--r--src/plugins/nat/nat44_cli.c1
-rw-r--r--src/plugins/nat/out2in_ed.c10
5 files changed, 210 insertions, 212 deletions
diff --git a/src/plugins/nat/in2out_ed.c b/src/plugins/nat/in2out_ed.c
index a70369aae4e..295958927cd 100644
--- a/src/plugins/nat/in2out_ed.c
+++ b/src/plugins/nat/in2out_ed.c
@@ -107,16 +107,6 @@ nat44_i2o_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg)
if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &ed_kv, 0))
nat_elog_warn ("out2in_ed key del failed");
- ed_bihash_kv_t bihash_key;
- clib_memset (&bihash_key, 0, sizeof (bihash_key));
- bihash_key.k.dst_address = s->ext_host_addr.as_u32;
- bihash_key.k.dst_port = s->ext_host_port;
- bihash_key.k.src_address = s->out2in.addr.as_u32;
- bihash_key.k.src_port = s->out2in.port;
- bihash_key.k.protocol = s->out2in.protocol;
- clib_bihash_add_del_16_8 (&sm->ed_ext_ports, &bihash_key.kv,
- 0 /* is_add */ );
-
if (snat_is_unk_proto_session (s))
goto delete;
@@ -201,57 +191,57 @@ snat_random_port (u16 min, u16 max)
}
static int
-nat_alloc_addr_and_port_ed (snat_address_t * addresses, u32 fib_index,
+nat_ed_alloc_addr_and_port (snat_main_t * sm, u32 fib_index,
u32 thread_index, nat_ed_ses_key_t * key,
snat_session_key_t * key1, u16 port_per_thread,
- u32 snat_thread_index)
+ u32 snat_thread_index,
+ snat_session_t * s,
+ clib_bihash_kv_16_8_t * out2in_ed_kv)
{
int i;
snat_address_t *a, *ga = 0;
u32 portnum;
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
const u16 port_thread_offset = (port_per_thread * snat_thread_index) + 1024;
- ed_bihash_kv_t bihash_key;
- clib_memset (&bihash_key, 0, sizeof (bihash_key));
- bihash_key.k.dst_address = key->r_addr.as_u32;
- bihash_key.k.dst_port = key->r_port;
- bihash_key.k.protocol = key1->protocol;
- for (i = 0; i < vec_len (addresses); i++)
+ for (i = 0; i < vec_len (sm->addresses); i++)
{
- a = addresses + i;
+ a = sm->addresses + i;
switch (key1->protocol)
{
-#define _(N, j, n, s) \
- case SNAT_PROTOCOL_##N: \
- if (a->fib_index == fib_index) \
- { \
- bihash_key.k.src_address = a->addr.as_u32; \
- u16 port = snat_random_port (1, port_per_thread); \
- u16 attempts = port_per_thread; \
- while (attempts > 0) \
- { \
- --attempts; \
- portnum = port_thread_offset + port; \
- bihash_key.k.src_port = clib_host_to_net_u16 (portnum); \
- int rv = clib_bihash_add_del_16_8 ( \
- &snat_main.ed_ext_ports, &bihash_key.kv, 2 /* is_add */); \
- if (0 == rv) \
- { \
- ++a->busy_##n##_port_refcounts[portnum]; \
- a->busy_##n##_ports_per_thread[thread_index]++; \
- a->busy_##n##_ports++; \
- key1->addr = a->addr; \
- key1->port = clib_host_to_net_u16 (portnum); \
- return 0; \
- } \
- port = (port + 1) % port_per_thread; \
- } \
- } \
- else if (a->fib_index == ~0) \
- { \
- ga = a; \
- } \
+#define _(N, j, n, unused) \
+ case SNAT_PROTOCOL_##N: \
+ if (a->fib_index == fib_index) \
+ { \
+ u16 port = snat_random_port (1, port_per_thread); \
+ u16 attempts = port_per_thread; \
+ while (attempts > 0) \
+ { \
+ --attempts; \
+ portnum = port_thread_offset + port; \
+ make_ed_kv (out2in_ed_kv, &a->addr, &key->r_addr, key->proto, \
+ s->out2in.fib_index, clib_host_to_net_u16 (portnum), \
+ key->r_port); \
+ out2in_ed_kv->value = s - tsm->sessions; \
+ int rv = clib_bihash_add_del_16_8 (&tsm->out2in_ed, out2in_ed_kv, \
+ 2 /* is_add */); \
+ if (0 == rv) \
+ { \
+ ++a->busy_##n##_port_refcounts[portnum]; \
+ a->busy_##n##_ports_per_thread[thread_index]++; \
+ a->busy_##n##_ports++; \
+ key1->addr = a->addr; \
+ key1->port = clib_host_to_net_u16 (portnum); \
+ return 0; \
+ } \
+ port = (port + 1) % port_per_thread; \
+ } \
+ } \
+ else if (a->fib_index == ~0) \
+ { \
+ ga = a; \
+ } \
break;
foreach_snat_protocol;
@@ -290,8 +280,8 @@ slow_path_ed (snat_main_t * sm,
snat_session_t ** sessionp,
vlib_node_runtime_t * node, u32 next, u32 thread_index, f64 now)
{
- snat_session_t *s = 0;
- snat_user_t *u;
+ snat_session_t *s = NULL;
+ snat_user_t *u = NULL;
snat_session_key_t key0, key1;
lb_nat_type_t lb = 0, is_sm = 0;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
@@ -299,6 +289,8 @@ slow_path_ed (snat_main_t * sm,
u32 proto = ip_proto_to_snat_proto (key->proto);
nat_outside_fib_t *outside_fib;
fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
+ clib_bihash_kv_16_8_t out2in_ed_kv;
+ bool out2in_ed_inserted = false;
u8 identity_nat;
fib_prefix_t pfx = {
.fp_proto = FIB_PROTOCOL_IP4,
@@ -309,12 +301,26 @@ slow_path_ed (snat_main_t * sm,
};
nat44_is_idle_session_ctx_t ctx;
+ if (PREDICT_TRUE (proto == SNAT_PROTOCOL_TCP))
+ {
+ if (PREDICT_FALSE
+ (!tcp_flags_is_init
+ (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)))
+ {
+ b->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN];
+ return NAT_NEXT_DROP;
+ }
+ }
+
if (PREDICT_FALSE (nat44_maximum_sessions_exceeded (sm, thread_index)))
{
- b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
- nat_ipfix_logging_max_sessions (thread_index, sm->max_translations);
- nat_elog_notice ("maximum sessions exceeded");
- return NAT_NEXT_DROP;
+ if (!nat_global_lru_free_one (sm, thread_index, now))
+ {
+ b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
+ nat_ipfix_logging_max_sessions (thread_index, sm->max_translations);
+ nat_elog_notice ("maximum sessions exceeded");
+ return NAT_NEXT_DROP;
+ }
}
key0.addr = key->l_addr;
@@ -327,16 +333,61 @@ slow_path_ed (snat_main_t * sm,
if (snat_static_mapping_match
(sm, key0, &key1, 0, 0, 0, &lb, 0, &identity_nat))
{
+ u =
+ nat_user_get_or_create (sm, &key->l_addr, rx_fib_index, thread_index);
+ if (!u)
+ {
+ nat_elog_warn ("create NAT user failed");
+ b->error = node->errors[NAT_IN2OUT_ED_ERROR_CANNOT_CREATE_USER];
+ goto drop;
+ }
+
+ s = nat_ed_session_alloc (sm, u, thread_index, now);
+ if (!s)
+ {
+ nat_elog_warn ("create NAT session failed");
+ b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED];
+ goto drop;
+ }
+ switch (vec_len (sm->outside_fibs))
+ {
+ case 0:
+ s->out2in.fib_index = sm->outside_fib_index;
+ break;
+ case 1:
+ s->out2in.fib_index = sm->outside_fibs[0].fib_index;
+ break;
+ default:
+ /* *INDENT-OFF* */
+ vec_foreach (outside_fib, sm->outside_fibs)
+ {
+ fei = fib_table_lookup (outside_fib->fib_index, &pfx);
+ if (FIB_NODE_INDEX_INVALID != fei)
+ {
+ if (fib_entry_get_resolving_interface (fei) != ~0)
+ {
+ s->out2in.fib_index = outside_fib->fib_index;
+ break;
+ }
+ }
+ }
+ /* *INDENT-ON* */
+ break;
+ }
+
/* Try to create dynamic translation */
- if (nat_alloc_addr_and_port_ed (sm->addresses, rx_fib_index,
+ if (nat_ed_alloc_addr_and_port (sm, rx_fib_index,
thread_index, key, &key1,
sm->port_per_thread,
- tsm->snat_thread_index))
+ tsm->snat_thread_index, s,
+ &out2in_ed_kv))
{
nat_elog_notice ("addresses exhausted");
b->error = node->errors[NAT_IN2OUT_ED_ERROR_OUT_OF_PORTS];
- return NAT_NEXT_DROP;
+ goto drop;
}
+
+ out2in_ed_inserted = true;
}
else
{
@@ -346,48 +397,63 @@ slow_path_ed (snat_main_t * sm,
return next;
}
is_sm = 1;
- }
+ u =
+ nat_user_get_or_create (sm, &key->l_addr, rx_fib_index, thread_index);
+ if (!u)
+ {
+ nat_elog_warn ("create NAT user failed");
+ b->error = node->errors[NAT_IN2OUT_ED_ERROR_CANNOT_CREATE_USER];
+ goto drop;
+ }
- if (PREDICT_TRUE (proto == SNAT_PROTOCOL_TCP))
- {
- if (PREDICT_FALSE
- (!tcp_flags_is_init
- (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)))
+ s = nat_ed_session_alloc (sm, u, thread_index, now);
+ if (!s)
{
- b->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN];
- if (!is_sm)
- snat_free_outside_address_and_port (sm->addresses,
- thread_index, &key1);
- return NAT_NEXT_DROP;
+ nat44_delete_user_with_no_session (sm, u, thread_index);
+ nat_elog_warn ("create NAT session failed");
+ b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED];
+ goto drop;
+ }
+ switch (vec_len (sm->outside_fibs))
+ {
+ case 0:
+ s->out2in.fib_index = sm->outside_fib_index;
+ break;
+ case 1:
+ s->out2in.fib_index = sm->outside_fibs[0].fib_index;
+ break;
+ default:
+ /* *INDENT-OFF* */
+ vec_foreach (outside_fib, sm->outside_fibs)
+ {
+ fei = fib_table_lookup (outside_fib->fib_index, &pfx);
+ if (FIB_NODE_INDEX_INVALID != fei)
+ {
+ if (fib_entry_get_resolving_interface (fei) != ~0)
+ {
+ s->out2in.fib_index = outside_fib->fib_index;
+ break;
+ }
+ }
+ }
+ /* *INDENT-ON* */
+ break;
}
- }
- u = nat_user_get_or_create (sm, &key->l_addr, rx_fib_index, thread_index);
- if (!u)
- {
- nat_elog_warn ("create NAT user failed");
- if (!is_sm)
- snat_free_outside_address_and_port (sm->addresses,
- thread_index, &key1);
- b->error = node->errors[NAT_IN2OUT_ED_ERROR_CANNOT_CREATE_USER];
- return NAT_NEXT_DROP;
- }
+ s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
- s = nat_ed_session_alloc (sm, u, thread_index, now);
- if (!s)
- {
- nat44_delete_user_with_no_session (sm, u, thread_index);
- nat_elog_warn ("create NAT session failed");
- if (!is_sm)
- snat_free_outside_address_and_port (sm->addresses,
- thread_index, &key1);
- b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED];
- return NAT_NEXT_DROP;
+
+ make_ed_kv (&out2in_ed_kv, &key1.addr, &key->r_addr, key->proto,
+ s->out2in.fib_index, key1.port, key->r_port);
+ out2in_ed_kv.value = s - tsm->sessions;
+ if (clib_bihash_add_or_overwrite_stale_16_8
+ (&tsm->out2in_ed, &out2in_ed_kv, nat44_o2i_ed_is_idle_session_cb,
+ &ctx))
+ nat_elog_notice ("out2in-ed key add failed");
+ out2in_ed_inserted = true;
}
user_session_increment (sm, u, is_sm);
- if (is_sm)
- s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
if (lb)
s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING;
s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
@@ -397,33 +463,6 @@ slow_path_ed (snat_main_t * sm,
s->out2in = key1;
s->out2in.protocol = key0.protocol;
- switch (vec_len (sm->outside_fibs))
- {
- case 0:
- s->out2in.fib_index = sm->outside_fib_index;
- break;
- case 1:
- s->out2in.fib_index = sm->outside_fibs[0].fib_index;
- break;
- default:
- /* *INDENT-OFF* */
- vec_foreach (outside_fib, sm->outside_fibs)
- {
- fei = fib_table_lookup (outside_fib->fib_index, &pfx);
- if (FIB_NODE_INDEX_INVALID != fei)
- {
- if (fib_entry_get_resolving_interface (fei) != ~0)
- {
- s->out2in.fib_index = outside_fib->fib_index;
- break;
- }
- }
- }
- /* *INDENT-ON* */
- break;
- }
-
- /* Add to lookup tables */
kv->value = s - tsm->sessions;
ctx.now = now;
ctx.thread_index = thread_index;
@@ -432,14 +471,6 @@ slow_path_ed (snat_main_t * sm,
&ctx))
nat_elog_notice ("in2out-ed key add failed");
- make_ed_kv (kv, &key1.addr, &key->r_addr, key->proto, s->out2in.fib_index,
- key1.port, key->r_port);
- kv->value = s - tsm->sessions;
- if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->out2in_ed, kv,
- nat44_o2i_ed_is_idle_session_cb,
- &ctx))
- nat_elog_notice ("out2in-ed key add failed");
-
*sessionp = s;
/* log NAT event */
@@ -464,6 +495,22 @@ slow_path_ed (snat_main_t * sm,
thread_index, 0);
return next;
+drop:
+ if (out2in_ed_inserted)
+ {
+ if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &out2in_ed_kv, 0))
+ nat_elog_notice ("out2in-ed key del failed");
+ }
+ if (s)
+ {
+ nat_free_session_data (sm, s, thread_index, 0);
+ nat44_ed_delete_session (sm, s, thread_index, 1);
+ }
+ if (u)
+ {
+ nat44_delete_user_with_no_session (sm, u, thread_index);
+ }
+ return NAT_NEXT_DROP;
}
static_always_inline int
diff --git a/src/plugins/nat/nat.c b/src/plugins/nat/nat.c
index 30238f9d62f..d27887e80e6 100755
--- a/src/plugins/nat/nat.c
+++ b/src/plugins/nat/nat.c
@@ -323,17 +323,6 @@ nat_free_session_data (snat_main_t * sm, snat_session_t * s, u32 thread_index,
if (snat_is_session_static (s))
return;
- ed_bihash_kv_t bihash_key;
- clib_memset (&bihash_key, 0, sizeof (bihash_key));
- bihash_key.k.dst_address = s->ext_host_addr.as_u32;
- bihash_key.k.dst_port = s->ext_host_port;
- bihash_key.k.src_address = s->out2in.addr.as_u32;
- bihash_key.k.src_port = s->out2in.port;
- bihash_key.k.protocol = s->out2in.protocol;
- if (sm->ed_ext_ports.instantiated)
- clib_bihash_add_del_16_8 (&sm->ed_ext_ports, &bihash_key.kv,
- 0 /* is_add */ );
-
snat_free_outside_address_and_port (sm->addresses, thread_index,
&s->out2in);
}
@@ -459,17 +448,6 @@ nat44_free_session_data (snat_main_t * sm, snat_session_t * s,
if (snat_is_session_static (s))
return;
- ed_bihash_kv_t bihash_key;
- clib_memset (&bihash_key, 0, sizeof (bihash_key));
- bihash_key.k.dst_address = s->ext_host_addr.as_u32;
- bihash_key.k.dst_port = s->ext_host_port;
- bihash_key.k.src_address = s->out2in.addr.as_u32;
- bihash_key.k.src_port = s->out2in.port;
- bihash_key.k.protocol = s->out2in.protocol;
- if (sm->ed_ext_ports.instantiated)
- clib_bihash_add_del_16_8 (&sm->ed_ext_ports, &bihash_key.kv,
- 0 /* is_add */ );
-
// should be called for every dynamic session
snat_free_outside_address_and_port (sm->addresses, thread_index,
&s->out2in);
@@ -611,6 +589,39 @@ nat_session_alloc_or_recycle (snat_main_t * sm, snat_user_t * u,
return s;
}
+int
+nat_global_lru_free_one (snat_main_t * sm, int thread_index, f64 now)
+{
+ snat_session_t *s = NULL;
+ dlist_elt_t *oldest_elt;
+ u64 sess_timeout_time;
+ u32 oldest_index;
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+ oldest_index = clib_dlist_remove_head (tsm->global_lru_pool,
+ tsm->global_lru_head_index);
+ if (~0 != oldest_index)
+ {
+ oldest_elt = pool_elt_at_index (tsm->global_lru_pool, oldest_index);
+ s = pool_elt_at_index (tsm->sessions, oldest_elt->value);
+
+ sess_timeout_time =
+ s->last_heard + (f64) nat44_session_get_timeout (sm, s);
+ if (now >= sess_timeout_time
+ || (s->tcp_close_timestamp && now >= s->tcp_close_timestamp))
+ {
+ nat_free_session_data (sm, s, thread_index, 0);
+ nat44_ed_delete_session (sm, s, thread_index, 0);
+ return 1;
+ }
+ else
+ {
+ clib_dlist_addhead (tsm->global_lru_pool,
+ tsm->global_lru_head_index, oldest_index);
+ }
+ }
+ return 0;
+}
+
snat_session_t *
nat_ed_session_alloc (snat_main_t * sm, snat_user_t * u, u32 thread_index,
f64 now)
@@ -663,34 +674,9 @@ nat_ed_session_alloc (snat_main_t * sm, snat_user_t * u, u32 thread_index,
}
alloc_new:
- /* try to free an expired session from global LRU list */
- if (!s)
- {
- oldest_index = clib_dlist_remove_head (tsm->global_lru_pool,
- tsm->global_lru_head_index);
- if (~0 != oldest_index)
- {
- oldest_elt = pool_elt_at_index (tsm->global_lru_pool, oldest_index);
- s = pool_elt_at_index (tsm->sessions, oldest_elt->value);
-
- sess_timeout_time =
- s->last_heard + (f64) nat44_session_get_timeout (sm, s);
- if (now >= sess_timeout_time
- || (s->tcp_close_timestamp && now >= s->tcp_close_timestamp))
- {
- nat_free_session_data (sm, s, thread_index, 0);
- nat44_ed_delete_session (sm, s, thread_index, 0);
- }
- else
- {
- clib_dlist_addhead (tsm->global_lru_pool,
- tsm->global_lru_head_index, oldest_index);
- }
- s = NULL;
- }
- }
if (!s)
{
+ nat_global_lru_free_one (sm, thread_index, now);
s = nat44_session_alloc_new (tsm, u, now);
vlib_set_simple_counter (&sm->total_sessions, thread_index, 0,
pool_elts (tsm->sessions));
@@ -4125,9 +4111,6 @@ snat_config (vlib_main_t * vm, unformat_input_t * input)
translation_memory_size);
clib_bihash_set_kvp_format_fn_16_8 (&tsm->out2in_ed,
format_ed_session_kvp);
- clib_bihash_init_16_8
- (&sm->ed_ext_ports, "ed-nat-5-tuple-port-overload-hash",
- translation_buckets, translation_memory_size);
}
else
{
diff --git a/src/plugins/nat/nat.h b/src/plugins/nat/nat.h
index be82ced4318..4b9f24308f5 100644
--- a/src/plugins/nat/nat.h
+++ b/src/plugins/nat/nat.h
@@ -555,27 +555,6 @@ typedef int (nat_alloc_out_addr_and_port_function_t) (snat_address_t *
u16 port_per_thread,
u32 snat_thread_index);
-typedef struct ed_bihash_key_s
-{
- u32 src_address;
- u32 dst_address;
- u16 src_port;
- u16 dst_port;
- u8 protocol;
-} ed_bihash_key_t;
-
-typedef struct ed_bihash_kv_s
-{
- union
- {
- ed_bihash_key_t k;
- clib_bihash_kv_16_8_t kv;
- };
-} ed_bihash_kv_t;
-
-STATIC_ASSERT (STRUCT_SIZE_OF (ed_bihash_kv_t, k) <=
- STRUCT_SIZE_OF (ed_bihash_kv_t, kv.key),
- "ed key needs to fit in bihash key");
typedef struct snat_main_s
{
@@ -729,8 +708,6 @@ typedef struct snat_main_s
ip4_main_t *ip4_main;
ip_lookup_main_t *ip4_lookup_main;
api_main_t *api_main;
-
- clib_bihash_16_8_t ed_ext_ports;
} snat_main_t;
typedef struct
@@ -1465,6 +1442,8 @@ typedef struct
u16 src_port, dst_port;
} tcp_udp_header_t;
+int nat_global_lru_free_one (snat_main_t * sm, int thread_index, f64 now);
+
#endif /* __included_nat_h__ */
/*
* fd.io coding-style-patch-verification: ON
diff --git a/src/plugins/nat/nat44_cli.c b/src/plugins/nat/nat44_cli.c
index 82c0433501c..333b3854845 100644
--- a/src/plugins/nat/nat44_cli.c
+++ b/src/plugins/nat/nat44_cli.c
@@ -245,7 +245,6 @@ nat44_show_hash_commnad_fn (vlib_main_t * vm, unformat_input_t * input,
{
vlib_cli_output (vm, "%U", format_bihash_16_8, &nam->affinity_hash,
verbose);
- vlib_cli_output (vm, "%U", format_bihash_16_8, &sm->ed_ext_ports, 0);
}
return 0;
}
diff --git a/src/plugins/nat/out2in_ed.c b/src/plugins/nat/out2in_ed.c
index 5b70b0c672a..e4f01303b4d 100644
--- a/src/plugins/nat/out2in_ed.c
+++ b/src/plugins/nat/out2in_ed.c
@@ -131,16 +131,6 @@ nat44_o2i_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg)
if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &ed_kv, 0))
nat_elog_warn ("in2out_ed key del failed");
- ed_bihash_kv_t bihash_key;
- clib_memset (&bihash_key, 0, sizeof (bihash_key));
- bihash_key.k.dst_address = s->ext_host_addr.as_u32;
- bihash_key.k.dst_port = s->ext_host_port;
- bihash_key.k.src_address = s->out2in.addr.as_u32;
- bihash_key.k.src_port = s->out2in.port;
- bihash_key.k.protocol = s->out2in.protocol;
- clib_bihash_add_del_16_8 (&sm->ed_ext_ports, &bihash_key.kv,
- 0 /* is_add */ );
-
if (snat_is_unk_proto_session (s))
goto delete;