#include <vnet/ip/ip.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/fib/ip4_fib.h>
+#include <vnet/udp/udp.h>
#include <vppinfra/error.h>
#include <nat/nat.h>
#include <nat/nat_ipfix_logging.h>
-#include <nat/nat_reass.h>
#include <nat/nat_inlines.h>
+#include <nat/nat44/inlines.h>
#include <nat/nat_syslog.h>
#include <nat/nat_ha.h>
#undef _
};
-typedef enum
-{
- NAT_IN2OUT_ED_NEXT_LOOKUP,
- NAT_IN2OUT_ED_NEXT_DROP,
- NAT_IN2OUT_ED_NEXT_ICMP_ERROR,
- NAT_IN2OUT_ED_NEXT_SLOW_PATH,
- NAT_IN2OUT_ED_NEXT_REASS,
- NAT_IN2OUT_ED_N_NEXT,
-} nat_in2out_ed_next_t;
-
typedef struct
{
u32 sw_if_index;
nat44_is_idle_session_ctx_t *ctx = arg;
snat_session_t *s;
u64 sess_timeout_time;
- nat_ed_ses_key_t ed_key;
+ u8 proto;
+ u16 r_port, l_port;
+ ip4_address_t *l_addr, *r_addr;
+ u32 fib_index;
clib_bihash_kv_16_8_t ed_kv;
int i;
snat_address_t *a;
if (is_fwd_bypass_session (s))
goto delete;
- ed_key.l_addr = s->out2in.addr;
- ed_key.r_addr = s->ext_host_addr;
- ed_key.fib_index = s->out2in.fib_index;
+ l_addr = &s->out2in.addr;
+ r_addr = &s->ext_host_addr;
+ fib_index = s->out2in.fib_index;
if (snat_is_unk_proto_session (s))
{
- ed_key.proto = s->in2out.port;
- ed_key.r_port = 0;
- ed_key.l_port = 0;
+ proto = s->in2out.port;
+ r_port = 0;
+ l_port = 0;
}
else
{
- ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol);
- ed_key.l_port = s->out2in.port;
- ed_key.r_port = s->ext_host_port;
+ proto = snat_proto_to_ip_proto (s->in2out.protocol);
+ l_port = s->out2in.port;
+ r_port = s->ext_host_port;
}
- ed_kv.key[0] = ed_key.as_u64[0];
- ed_kv.key[1] = ed_key.as_u64[1];
+ make_ed_kv (l_addr, r_addr, proto, fib_index, l_port, r_port, ~0ULL,
+ &ed_kv);
if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &ed_kv, 0))
nat_elog_warn ("out2in_ed key del failed");
snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
&s->out2in);
delete:
- nat44_delete_session (sm, s, ctx->thread_index);
+ nat44_ed_delete_session (sm, s, ctx->thread_index, 1);
return 1;
}
next0 = icmp_in2out (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
next0, thread_index, p_s0, 0);
snat_session_t *s0 = *p_s0;
- if (PREDICT_TRUE (next0 != NAT_IN2OUT_ED_NEXT_DROP && s0))
+ if (PREDICT_TRUE (next0 != NAT_NEXT_DROP && s0))
{
/* Accounting */
nat44_session_update_counters (s0, now,
return next0;
}
+static_always_inline u16
+snat_random_port (u16 min, u16 max)
+{
+ snat_main_t *sm = &snat_main;
+ return min + random_u32 (&sm->random_seed) /
+ (random_u32_max () / (max - min + 1) + 1);
+}
+
+static int
+nat_ed_alloc_addr_and_port (snat_main_t * sm, u32 rx_fib_index,
+ u32 snat_proto, u32 thread_index,
+ ip4_address_t r_addr, u16 r_port, u8 proto,
+ u16 port_per_thread, u32 snat_thread_index,
+ snat_session_t * s,
+ ip4_address_t * allocated_addr,
+ u16 * allocated_port,
+ 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;
+
+ for (i = 0; i < vec_len (sm->addresses); i++)
+ {
+ a = sm->addresses + i;
+ switch (snat_proto)
+ {
+#define _(N, j, n, unused) \
+ case SNAT_PROTOCOL_##N: \
+ if (a->fib_index == rx_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 (&a->addr, &r_addr, proto, s->out2in.fib_index, \
+ clib_host_to_net_u16 (portnum), r_port, \
+ s - tsm->sessions, out2in_ed_kv); \
+ 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++; \
+ *allocated_addr = a->addr; \
+ *allocated_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;
+ default:
+ nat_elog_info ("unknown protocol");
+ return 1;
+ }
+ }
+
+ if (ga)
+ {
+ /* fake fib_index to reuse macro */
+ rx_fib_index = ~0;
+ a = ga;
+ switch (snat_proto)
+ {
+ foreach_snat_protocol;
+ default:
+ nat_elog_info ("unknown protocol");
+ return 1;
+ }
+ }
+
+#undef _
+
+ /* Totally out of translations to use... */
+ snat_ipfix_logging_addresses_exhausted (thread_index, 0);
+ return 1;
+}
+
static u32
slow_path_ed (snat_main_t * sm,
vlib_buffer_t * b,
+ ip4_address_t l_addr,
+ ip4_address_t r_addr,
+ u16 l_port,
+ u16 r_port,
+ u8 proto,
u32 rx_fib_index,
- clib_bihash_kv_16_8_t * kv,
snat_session_t ** sessionp,
- vlib_node_runtime_t * node, u32 next, u32 thread_index, f64 now,
- tcp_header_t * tcp)
+ 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_session_key_t key0, key1;
- lb_nat_type_t lb = 0, is_sm = 0;
+ lb_nat_type_t lb = 0;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- nat_ed_ses_key_t *key = (nat_ed_ses_key_t *) kv->key;
- u32 proto = ip_proto_to_snat_proto (key->proto);
+ u32 snat_proto = ip_proto_to_snat_proto (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;
+ ip4_address_t allocated_addr;
+ u16 allocated_port;
u8 identity_nat;
fib_prefix_t pfx = {
.fp_proto = FIB_PROTOCOL_IP4,
.fp_len = 32,
- .fp_addr = {
- .ip4.as_u32 = key->r_addr.as_u32,
- },
+ .fp_addr = {.ip4.as_u32 = r_addr.as_u32,},
};
nat44_is_idle_session_ctx_t ctx;
- if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index)))
+ if (PREDICT_TRUE (snat_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;
+ }
+ }
+
+ // TODO: based on fib index do a lookup
+ if (PREDICT_FALSE
+ (nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, 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_IN2OUT_ED_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;
- key0.port = key->l_port;
- key1.protocol = key0.protocol = proto;
+ key0.addr = l_addr;
+ key0.port = l_port;
+ key1.protocol = key0.protocol = snat_proto;
key0.fib_index = rx_fib_index;
key1.fib_index = sm->outside_fib_index;
+
/* First try to match static mapping by local address and port */
if (snat_static_mapping_match
(sm, key0, &key1, 0, 0, 0, &lb, 0, &identity_nat))
{
+ s = nat_ed_session_alloc (sm, 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 (snat_alloc_outside_address_and_port (sm->addresses, rx_fib_index,
- thread_index, &key1,
- sm->port_per_thread,
- tsm->snat_thread_index))
+ if (nat_ed_alloc_addr_and_port (sm, rx_fib_index, snat_proto,
+ thread_index, r_addr, r_port, proto,
+ sm->port_per_thread,
+ tsm->snat_thread_index, s,
+ &allocated_addr,
+ &allocated_port, &out2in_ed_kv))
{
nat_elog_notice ("addresses exhausted");
b->error = node->errors[NAT_IN2OUT_ED_ERROR_OUT_OF_PORTS];
- return NAT_IN2OUT_ED_NEXT_DROP;
+ goto drop;
}
+
+ out2in_ed_inserted = true;
+ key1.addr = allocated_addr;
+ key1.port = allocated_port;
}
else
{
*sessionp = s;
return next;
}
-
- is_sm = 1;
- }
-
- if (proto == SNAT_PROTOCOL_TCP)
- {
- if (!tcp_is_init (tcp))
+ s = nat_ed_session_alloc (sm, thread_index, now);
+ if (!s)
{
- b->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN];
- return NAT_IN2OUT_ED_NEXT_DROP;
+ 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);
- return NAT_IN2OUT_ED_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);
- return NAT_IN2OUT_ED_NEXT_DROP;
+
+ make_ed_kv (&key1.addr, &r_addr, proto,
+ s->out2in.fib_index, key1.port, r_port, s - tsm->sessions,
+ &out2in_ed_kv);
+ 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;
- s->ext_host_addr = key->r_addr;
- s->ext_host_port = key->r_port;
+ s->ext_host_addr = r_addr;
+ s->ext_host_port = r_port;
s->in2out = key0;
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;
+ clib_bihash_kv_16_8_t in2out_ed_kv;
+ make_ed_kv (&l_addr, &r_addr, proto, rx_fib_index, l_port, r_port,
+ s - tsm->sessions, &in2out_ed_kv);
ctx.now = now;
ctx.thread_index = thread_index;
- if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, kv,
+ if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, &in2out_ed_kv,
nat44_i2o_ed_is_idle_session_cb,
&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 */
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);
+ }
+ return NAT_NEXT_DROP;
}
static_always_inline int
clib_bihash_kv_16_8_t kv, value;
snat_session_key_t key0, key1;
- make_ed_kv (&kv, &ip->dst_address, &ip->src_address, ip->protocol,
- sm->outside_fib_index, udp->dst_port, udp->src_port);
+ make_ed_kv (&ip->dst_address, &ip->src_address, ip->protocol,
+ sm->outside_fib_index, udp->dst_port, udp->src_port, ~0ULL,
+ &kv);
- /* NAT packet aimed at external address if */
- /* has active sessions */
+ /* NAT packet aimed at external address if has active sessions */
if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
{
key0.addr = ip->dst_address;
u32 thread_index, f64 now,
vlib_main_t * vm, vlib_buffer_t * b)
{
- nat_ed_ses_key_t key;
clib_bihash_kv_16_8_t kv, value;
- udp_header_t *udp;
snat_session_t *s = 0;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
if (ip->protocol == IP_PROTOCOL_ICMP)
{
- key.as_u64[0] = key.as_u64[1] = 0;
- if (get_icmp_i2o_ed_key (ip, &key))
+ if (get_icmp_i2o_ed_key (b, ip, 0, ~0ULL, 0, 0, 0, &kv))
return 0;
- key.fib_index = 0;
- kv.key[0] = key.as_u64[0];
- kv.key[1] = key.as_u64[1];
}
else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
{
- udp = ip4_next_header (ip);
- make_ed_kv (&kv, &ip->src_address, &ip->dst_address, ip->protocol, 0,
- udp->src_port, udp->dst_port);
+ make_ed_kv (&ip->src_address, &ip->dst_address, ip->protocol, 0,
+ vnet_buffer (b)->ip.reass.l4_src_port,
+ vnet_buffer (b)->ip.reass.l4_dst_port, ~0ULL, &kv);
}
else
{
- make_ed_kv (&kv, &ip->src_address, &ip->dst_address, ip->protocol, 0, 0,
- 0);
+ make_ed_kv (&ip->src_address, &ip->dst_address, ip->protocol, 0, 0,
+ 0, ~0ULL, &kv);
}
if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
{
if (ip->protocol == IP_PROTOCOL_TCP)
{
- tcp_header_t *tcp = ip4_next_header (ip);
- if (nat44_set_tcp_session_state_i2o (sm, s, tcp, thread_index))
+ if (nat44_set_tcp_session_state_i2o
+ (sm, now, s, b, thread_index))
return 1;
}
/* Accounting */
static_always_inline int
nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip,
- u8 proto, u16 src_port, u16 dst_port,
+ u16 src_port, u16 dst_port,
u32 thread_index, u32 rx_sw_if_index,
u32 tx_sw_if_index)
{
u32 tx_fib_index = ip4_fib_table_get_index_for_sw_if_index (tx_sw_if_index);
/* src NAT check */
- make_ed_kv (&kv, &ip->src_address, &ip->dst_address, proto, tx_fib_index,
- src_port, dst_port);
+ make_ed_kv (&ip->src_address, &ip->dst_address, ip->protocol,
+ tx_fib_index, src_port, dst_port, ~0ULL, &kv);
if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
{
s = pool_elt_at_index (tsm->sessions, value.value);
if (nat44_is_ses_closed (s))
{
nat_free_session_data (sm, s, thread_index, 0);
- nat44_delete_session (sm, s, thread_index);
+ nat44_ed_delete_session (sm, s, thread_index, 1);
}
else
s->flags |= SNAT_SESSION_FLAG_OUTPUT_FEATURE;
}
/* dst NAT check */
- make_ed_kv (&kv, &ip->dst_address, &ip->src_address, proto, rx_fib_index,
- dst_port, src_port);
+ make_ed_kv (&ip->dst_address, &ip->src_address, ip->protocol,
+ rx_fib_index, dst_port, src_port, ~0ULL, &kv);
if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
{
s = pool_elt_at_index (tsm->sessions, value.value);
u8 * p_proto, snat_session_key_t * p_value,
u8 * p_dont_translate, void *d, void *e)
{
- icmp46_header_t *icmp;
u32 sw_if_index;
u32 rx_fib_index;
- nat_ed_ses_key_t key;
snat_session_t *s = 0;
u8 dont_translate = 0;
clib_bihash_kv_16_8_t kv, value;
u32 next = ~0;
int err;
+ u16 l_port = 0, r_port = 0; // initialize to workaround gcc warning
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- icmp = (icmp46_header_t *) ip4_next_header (ip);
sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index);
- key.as_u64[0] = key.as_u64[1] = 0;
- err = get_icmp_i2o_ed_key (ip, &key);
+ err =
+ get_icmp_i2o_ed_key (b, ip, rx_fib_index, ~0ULL, p_proto, &l_port,
+ &r_port, &kv);
if (err != 0)
{
b->error = node->errors[err];
- next = NAT_IN2OUT_ED_NEXT_DROP;
+ next = NAT_NEXT_DROP;
goto out;
}
- key.fib_index = rx_fib_index;
-
- kv.key[0] = key.as_u64[0];
- kv.key[1] = key.as_u64[1];
if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
{
if (vnet_buffer (b)->sw_if_index[VLIB_TX] != ~0)
{
- if (PREDICT_FALSE (nat44_ed_not_translate_output_feature (sm, ip,
- key.proto,
- key.
- l_port,
- key.
- r_port,
- thread_index,
- sw_if_index,
- vnet_buffer
- (b)->
- sw_if_index
- [VLIB_TX])))
+ if (PREDICT_FALSE
+ (nat44_ed_not_translate_output_feature
+ (sm, ip, l_port, r_port, thread_index,
+ sw_if_index, vnet_buffer (b)->sw_if_index[VLIB_TX])))
{
dont_translate = 1;
goto out;
}
}
- if (PREDICT_FALSE (icmp_is_error_message (icmp)))
+ if (PREDICT_FALSE
+ (icmp_type_is_error_message
+ (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)))
{
b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
- next = NAT_IN2OUT_ED_NEXT_DROP;
+ next = NAT_NEXT_DROP;
goto out;
}
- next = slow_path_ed (sm, b, rx_fib_index, &kv, &s, node, next,
- thread_index, vlib_time_now (sm->vlib_main), 0);
+ next =
+ slow_path_ed (sm, b, ip->src_address, ip->dst_address, l_port, r_port,
+ ip->protocol, rx_fib_index, &s, node, next,
+ thread_index, vlib_time_now (sm->vlib_main));
- if (PREDICT_FALSE (next == NAT_IN2OUT_ED_NEXT_DROP))
+ if (PREDICT_FALSE (next == NAT_NEXT_DROP))
goto out;
if (!s)
}
else
{
- if (PREDICT_FALSE (icmp->type != ICMP4_echo_request &&
- icmp->type != ICMP4_echo_reply &&
- !icmp_is_error_message (icmp)))
+ if (PREDICT_FALSE
+ (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_request
+ && vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_reply
+ && !icmp_type_is_error_message (vnet_buffer (b)->ip.
+ reass.icmp_type_or_tcp_flags)))
{
b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
- next = NAT_IN2OUT_ED_NEXT_DROP;
+ next = NAT_NEXT_DROP;
goto out;
}
s = pool_elt_at_index (tsm->sessions, value.value);
}
-
- *p_proto = ip_proto_to_snat_proto (key.proto);
out:
if (s)
*p_value = s->out2in;
snat_static_mapping_t *m;
u32 old_addr, new_addr = 0;
ip_csum_t sum;
- snat_user_t *u;
- dlist_elt_t *head, *elt;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- u32 elt_index, head_index, ses_index;
snat_session_t *s;
u32 outside_fib_index = sm->outside_fib_index;
int i;
}
old_addr = ip->src_address.as_u32;
- make_ed_kv (&s_kv, &ip->src_address, &ip->dst_address, ip->protocol,
- rx_fib_index, 0, 0);
+ make_ed_kv (&ip->src_address, &ip->dst_address, ip->protocol,
+ rx_fib_index, 0, 0, ~0ULL, &s_kv);
if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &s_kv, &s_value))
{
}
else
{
- if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index)))
+ if (PREDICT_FALSE
+ (nat44_ed_maximum_sessions_exceeded
+ (sm, rx_fib_index, thread_index)))
{
b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
nat_ipfix_logging_max_sessions (thread_index, sm->max_translations);
return 0;
}
- u = nat_user_get_or_create (sm, &ip->src_address, rx_fib_index,
- thread_index);
- if (!u)
- {
- nat_elog_warn ("create NAT user failed");
- return 0;
- }
-
make_sm_kv (&kv, &ip->src_address, 0, rx_fib_index, 0);
/* Try to find static mapping first */
is_sm = 1;
goto create_ses;
}
- /* Fallback to 3-tuple key */
else
{
- /* Choose same out address as for TCP/UDP session to same destination */
- head_index = u->sessions_per_user_list_head_index;
- head = pool_elt_at_index (tsm->list_pool, head_index);
- elt_index = head->next;
- if (PREDICT_FALSE (elt_index == ~0))
- ses_index = ~0;
- else
- {
- elt = pool_elt_at_index (tsm->list_pool, elt_index);
- ses_index = elt->value;
- }
-
- while (ses_index != ~0)
- {
- s = pool_elt_at_index (tsm->sessions, ses_index);
- elt_index = elt->next;
- elt = pool_elt_at_index (tsm->list_pool, elt_index);
- ses_index = elt->value;
-
- if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32)
- {
- new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
-
- make_ed_kv (&s_kv, &s->out2in.addr, &ip->dst_address,
- ip->protocol, outside_fib_index, 0, 0);
- if (clib_bihash_search_16_8
- (&tsm->out2in_ed, &s_kv, &s_value))
- goto create_ses;
-
- break;
- }
- }
+ /* *INDENT-OFF* */
+ pool_foreach (s, tsm->sessions, {
+ if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32)
+ {
+ new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
+
+ make_ed_kv (&s->out2in.addr, &ip->dst_address, ip->protocol,
+ outside_fib_index, 0, 0, ~0ULL, &s_kv);
+ if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
+ goto create_ses;
+
+ break;
+ }
+ });
+ /* *INDENT-ON* */
for (i = 0; i < vec_len (sm->addresses); i++)
{
- make_ed_kv (&s_kv, &sm->addresses[i].addr, &ip->dst_address,
- ip->protocol, outside_fib_index, 0, 0);
+ make_ed_kv (&sm->addresses[i].addr, &ip->dst_address,
+ ip->protocol, outside_fib_index, 0, 0, ~0ULL,
+ &s_kv);
if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value))
{
new_addr = ip->src_address.as_u32 =
}
create_ses:
- s = nat_ed_session_alloc (sm, u, thread_index, now);
+ s = nat_ed_session_alloc (sm, thread_index, now);
if (!s)
{
- nat44_delete_user_with_no_session (sm, u, thread_index);
+ b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED];
nat_elog_warn ("create NAT session failed");
return 0;
}
s->in2out.port = s->out2in.port = ip->protocol;
if (is_sm)
s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
- user_session_increment (sm, u, is_sm);
/* Add to lookup tables */
- make_ed_kv (&s_kv, &s->in2out.addr, &ip->dst_address, ip->protocol,
- rx_fib_index, 0, 0);
- s_kv.value = s - tsm->sessions;
+ make_ed_kv (&s->in2out.addr, &ip->dst_address, ip->protocol,
+ rx_fib_index, 0, 0, s - tsm->sessions, &s_kv);
if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1))
nat_elog_notice ("in2out key add failed");
- make_ed_kv (&s_kv, &s->out2in.addr, &ip->dst_address, ip->protocol,
- outside_fib_index, 0, 0);
- s_kv.value = s - tsm->sessions;
+ make_ed_kv (&s->out2in.addr, &ip->dst_address, ip->protocol,
+ outside_fib_index, 0, 0, s - tsm->sessions, &s_kv);
if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &s_kv, 1))
nat_elog_notice ("out2in key add failed");
}
}
static inline uword
-nat44_ed_in2out_node_fn_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame, int is_slow_path,
- int is_output_feature)
+nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame,
+ int is_output_feature)
{
u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
- nat_in2out_ed_next_t next_index;
+ nat_next_t next_index;
snat_main_t *sm = &snat_main;
f64 now = vlib_time_now (vm);
u32 thread_index = vm->thread_index;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets =
- 0, fragments = 0;
+ 0, def_slow;
- stats_node_index = is_slow_path ? sm->ed_in2out_slowpath_node_index :
- sm->ed_in2out_node_index;
+ def_slow = is_output_feature ? NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH :
+ NAT_NEXT_IN2OUT_ED_SLOW_PATH;
+
+ stats_node_index = sm->ed_in2out_node_index;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
- while (n_left_from >= 4 && n_left_to_next >= 2)
+ while (n_left_from > 0 && n_left_to_next > 0)
{
- u32 bi0, bi1;
- vlib_buffer_t *b0, *b1;
+ u32 bi0;
+ vlib_buffer_t *b0;
u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0,
new_addr0, old_addr0;
- u32 next1, sw_if_index1, rx_fib_index1, iph_offset1 = 0, proto1,
- new_addr1, old_addr1;
- u16 old_port0, new_port0, old_port1, new_port1;
- ip4_header_t *ip0, *ip1;
- udp_header_t *udp0, *udp1;
- tcp_header_t *tcp0, *tcp1;
- icmp46_header_t *icmp0, *icmp1;
- snat_session_t *s0 = 0, *s1 = 0;
- clib_bihash_kv_16_8_t kv0, value0, kv1, value1;
- ip_csum_t sum0, sum1;
-
- /* 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, CLIB_CACHE_LINE_BYTES, STORE);
- CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
- }
-
- /* speculatively enqueue b0 and 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;
+ u16 old_port0, new_port0;
+ ip4_header_t *ip0;
+ udp_header_t *udp0;
+ tcp_header_t *tcp0;
+ snat_session_t *s0 = 0;
+ clib_bihash_kv_16_8_t kv0, value0;
+ ip_csum_t sum0;
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
+ /* 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;
- next0 = NAT_IN2OUT_ED_NEXT_LOOKUP;
+ b0 = vlib_get_buffer (vm, bi0);
if (is_output_feature)
- iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
+ {
+ vnet_feature_next (&vnet_buffer2 (b0)->nat.arc_next, b0);
+ iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
+ }
+
+ next0 = vnet_buffer2 (b0)->nat.arc_next;
ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
iph_offset0);
icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
ICMP4_time_exceeded_ttl_exceeded_in_transit,
0);
- next0 = NAT_IN2OUT_ED_NEXT_ICMP_ERROR;
- goto trace00;
+ next0 = NAT_NEXT_ICMP_ERROR;
+ goto trace0;
}
udp0 = ip4_next_header (ip0);
tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
proto0 = ip_proto_to_snat_proto (ip0->protocol);
- if (is_slow_path)
+ if (PREDICT_FALSE (proto0 == ~0))
{
- if (PREDICT_FALSE (proto0 == ~0))
- {
- s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0,
- rx_fib_index0,
- thread_index, now, vm,
- node);
- if (!s0)
- next0 = NAT_IN2OUT_ED_NEXT_DROP;
- other_packets++;
- goto trace00;
- }
-
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_in2out_ed_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
- icmp_packets++;
- goto trace00;
- }
+ next0 = def_slow;
+ goto trace0;
}
- else
- {
- if (PREDICT_FALSE (proto0 == ~0))
- {
- next0 = NAT_IN2OUT_ED_NEXT_SLOW_PATH;
- goto trace00;
- }
-
- if (ip4_is_fragment (ip0))
- {
- next0 = NAT_IN2OUT_ED_NEXT_REASS;
- fragments++;
- goto trace00;
- }
- if (is_output_feature)
- {
- if (PREDICT_FALSE
- (nat_not_translate_output_feature_fwd
- (sm, ip0, thread_index, now, vm, b0)))
- goto trace00;
- }
+ if (is_output_feature)
+ {
+ if (PREDICT_FALSE (nat_not_translate_output_feature_fwd
+ (sm, ip0, thread_index, now, vm, b0)))
+ goto trace0;
+ }
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = NAT_IN2OUT_ED_NEXT_SLOW_PATH;
- goto trace00;
- }
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ {
+ next0 = def_slow;
+ goto trace0;
}
- make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address,
- ip0->protocol, rx_fib_index0, udp0->src_port,
- udp0->dst_port);
+ make_ed_kv (&ip0->src_address, &ip0->dst_address,
+ ip0->protocol, rx_fib_index0,
+ vnet_buffer (b0)->ip.reass.l4_src_port,
+ vnet_buffer (b0)->ip.reass.l4_dst_port, ~0ULL, &kv0);
+ // lookup for session
if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
{
- if (is_slow_path)
- {
- if (is_output_feature)
- {
- if (PREDICT_FALSE
- (nat44_ed_not_translate_output_feature
- (sm, ip0, ip0->protocol, udp0->src_port,
- udp0->dst_port, thread_index, sw_if_index0,
- vnet_buffer (b0)->sw_if_index[VLIB_TX])))
- goto trace00;
- }
- else
- {
- if (PREDICT_FALSE (nat44_ed_not_translate (sm, node,
- sw_if_index0,
- ip0, proto0,
- rx_fib_index0,
- thread_index)))
- goto trace00;
- }
-
- next0 =
- slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node,
- next0, thread_index, now, tcp0);
-
- if (PREDICT_FALSE (next0 == NAT_IN2OUT_ED_NEXT_DROP))
- goto trace00;
+ // session does not exist go slow path
+ next0 = def_slow;
+ goto trace0;
+ }
+ s0 = pool_elt_at_index (tsm->sessions, value0.value);
- if (PREDICT_FALSE (!s0))
- goto trace00;
+ if (s0->tcp_close_timestamp)
+ {
+ if (now >= s0->tcp_close_timestamp)
+ {
+ // session is closed, go slow path
+ next0 = def_slow;
}
else
{
- next0 = NAT_IN2OUT_ED_NEXT_SLOW_PATH;
- goto trace00;
+ // session in transitory timeout, drop
+ b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TCP_CLOSED];
+ next0 = NAT_NEXT_DROP;
}
+ goto trace0;
}
- else
+
+ // drop if session expired
+ u64 sess_timeout_time;
+ sess_timeout_time = s0->last_heard +
+ (f64) nat44_session_get_timeout (sm, s0);
+ if (now >= sess_timeout_time)
{
- s0 = pool_elt_at_index (tsm->sessions, value0.value);
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat44_ed_delete_session (sm, s0, thread_index, 1);
+ // session is closed, go slow path
+ next0 = def_slow;
+ goto trace0;
}
b0->flags |= VNET_BUFFER_F_IS_NATED;
dst_address);
ip0->checksum = ip_csum_fold (sum0);
- old_port0 = udp0->src_port;
- new_port0 = udp0->src_port = s0->out2in.port;
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
{
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
- length);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
- s0->ext_host_addr.as_u32,
- ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, tcp0->dst_port,
- s0->ext_host_port, ip4_header_t,
- length);
- tcp0->dst_port = s0->ext_host_port;
- ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
+ new_port0 = udp0->src_port = s0->out2in.port;
+ sum0 = tcp0->checksum;
+ sum0 =
+ ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t, dst_address);
+ sum0 =
+ ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t, length);
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ {
+ sum0 =
+ ip_csum_update (sum0, ip0->dst_address.as_u32,
+ s0->ext_host_addr.as_u32,
+ ip4_header_t, dst_address);
+ sum0 =
+ ip_csum_update (sum0,
+ vnet_buffer (b0)->ip.
+ reass.l4_dst_port, s0->ext_host_port,
+ ip4_header_t, length);
+ tcp0->dst_port = s0->ext_host_port;
+ ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
+ }
+ mss_clamping (sm, tcp0, &sum0);
+ tcp0->checksum = ip_csum_fold (sum0);
}
- mss_clamping (sm, tcp0, &sum0);
- tcp0->checksum = ip_csum_fold (sum0);
tcp_packets++;
if (nat44_set_tcp_session_state_i2o
- (sm, s0, tcp0, thread_index))
- goto trace00;
+ (sm, now, s0, b0, thread_index))
+ goto trace0;
}
- else if (udp0->checksum)
+ else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
+ && udp0->checksum)
{
+ new_port0 = udp0->src_port = s0->out2in.port;
sum0 = udp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
- length);
+ sum0 =
+ ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address);
+ sum0 =
+ ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
+ length);
if (PREDICT_FALSE (is_twice_nat_session (s0)))
{
sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
s0->ext_host_addr.as_u32,
ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, tcp0->dst_port,
- s0->ext_host_port, ip4_header_t,
- length);
+ sum0 =
+ ip_csum_update (sum0,
+ vnet_buffer (b0)->ip.reass.l4_dst_port,
+ s0->ext_host_port, ip4_header_t, length);
udp0->dst_port = s0->ext_host_port;
ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
}
}
else
{
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- udp0->dst_port = s0->ext_host_port;
- ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
+ new_port0 = udp0->src_port = s0->out2in.port;
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ {
+ udp0->dst_port = s0->ext_host_port;
+ ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
+ }
+ udp_packets++;
}
- udp_packets++;
}
/* Accounting */
nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm,
- b0),
- thread_index);
+ vlib_buffer_length_in_chain
+ (vm, b0), thread_index);
/* Per-user LRU list maintenance */
nat44_session_update_lru (sm, s0, thread_index);
- trace00:
+ trace0:
if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
&& (b0->flags & VLIB_BUFFER_IS_TRACED)))
{
nat_in2out_ed_trace_t *t =
vlib_add_trace (vm, node, b0, sizeof (*t));
- t->is_slow_path = is_slow_path;
t->sw_if_index = sw_if_index0;
t->next_index = next0;
- t->session_index = ~0;
+ t->is_slow_path = 0;
+
if (s0)
t->session_index = s0 - tsm->sessions;
+ else
+ t->session_index = ~0;
}
- pkts_processed += next0 == NAT_IN2OUT_ED_NEXT_LOOKUP;
-
-
- next1 = NAT_IN2OUT_ED_NEXT_LOOKUP;
-
- if (is_output_feature)
- iph_offset1 = vnet_buffer (b1)->ip.save_rewrite_length;
+ pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next;
+ /* 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);
+ }
- ip1 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b1) +
- iph_offset1);
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
- sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
- rx_fib_index1 =
- fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index1);
+ vlib_node_increment_counter (vm, stats_node_index,
+ NAT_IN2OUT_ED_ERROR_IN2OUT_PACKETS,
+ pkts_processed);
+ vlib_node_increment_counter (vm, stats_node_index,
+ NAT_IN2OUT_ED_ERROR_TCP_PACKETS, tcp_packets);
+ vlib_node_increment_counter (vm, stats_node_index,
+ NAT_IN2OUT_ED_ERROR_UDP_PACKETS, udp_packets);
+ vlib_node_increment_counter (vm, stats_node_index,
+ NAT_IN2OUT_ED_ERROR_ICMP_PACKETS,
+ icmp_packets);
+ vlib_node_increment_counter (vm, stats_node_index,
+ NAT_IN2OUT_ED_ERROR_OTHER_PACKETS,
+ other_packets);
+ return frame->n_vectors;
+}
- if (PREDICT_FALSE (ip1->ttl == 1))
- {
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next1 = NAT_IN2OUT_ED_NEXT_ICMP_ERROR;
- goto trace01;
- }
+static inline uword
+nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame,
+ int is_output_feature)
+{
+ u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index;
+ nat_next_t next_index;
+ snat_main_t *sm = &snat_main;
+ f64 now = vlib_time_now (vm);
+ u32 thread_index = vm->thread_index;
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+ u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets = 0;
- udp1 = ip4_next_header (ip1);
- tcp1 = (tcp_header_t *) udp1;
- icmp1 = (icmp46_header_t *) udp1;
- proto1 = ip_proto_to_snat_proto (ip1->protocol);
+ stats_node_index = sm->ed_in2out_slowpath_node_index;
- if (is_slow_path)
- {
- if (PREDICT_FALSE (proto1 == ~0))
- {
- s1 = nat44_ed_in2out_unknown_proto (sm, b1, ip1,
- rx_fib_index1,
- thread_index, now, vm,
- node);
- if (!s1)
- next1 = NAT_IN2OUT_ED_NEXT_DROP;
- other_packets++;
- goto trace01;
- }
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
- if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
- {
- next1 = icmp_in2out_ed_slow_path
- (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node,
- next1, now, thread_index, &s1);
- icmp_packets++;
- goto trace01;
- }
- }
- else
- {
- if (PREDICT_FALSE (proto1 == ~0))
- {
- next1 = NAT_IN2OUT_ED_NEXT_SLOW_PATH;
- goto trace01;
- }
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
- if (ip4_is_fragment (ip1))
- {
- next1 = NAT_IN2OUT_ED_NEXT_REASS;
- fragments++;
- goto trace01;
- }
-
- if (is_output_feature)
- {
- if (PREDICT_FALSE
- (nat_not_translate_output_feature_fwd
- (sm, ip1, thread_index, now, vm, b1)))
- goto trace01;
- }
-
- if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP))
- {
- next1 = NAT_IN2OUT_ED_NEXT_SLOW_PATH;
- goto trace01;
- }
- }
-
- make_ed_kv (&kv1, &ip1->src_address, &ip1->dst_address,
- ip1->protocol, rx_fib_index1, udp1->src_port,
- udp1->dst_port);
-
- if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv1, &value1))
- {
- if (is_slow_path)
- {
- if (is_output_feature)
- {
- if (PREDICT_FALSE
- (nat44_ed_not_translate_output_feature
- (sm, ip1, ip1->protocol, udp1->src_port,
- udp1->dst_port, thread_index, sw_if_index1,
- vnet_buffer (b1)->sw_if_index[VLIB_TX])))
- goto trace01;
- }
- else
- {
- if (PREDICT_FALSE (nat44_ed_not_translate (sm, node,
- sw_if_index1,
- ip1, proto1,
- rx_fib_index1,
- thread_index)))
- goto trace01;
- }
-
- next1 =
- slow_path_ed (sm, b1, rx_fib_index1, &kv1, &s1, node,
- next1, thread_index, now, tcp1);
-
- if (PREDICT_FALSE (next1 == NAT_IN2OUT_ED_NEXT_DROP))
- goto trace01;
-
- if (PREDICT_FALSE (!s1))
- goto trace01;
- }
- else
- {
- next1 = NAT_IN2OUT_ED_NEXT_SLOW_PATH;
- goto trace01;
- }
- }
- else
- {
- s1 = pool_elt_at_index (tsm->sessions, value1.value);
- }
-
- b1->flags |= VNET_BUFFER_F_IS_NATED;
-
- if (!is_output_feature)
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = s1->out2in.fib_index;
-
- old_addr1 = ip1->src_address.as_u32;
- new_addr1 = ip1->src_address.as_u32 = s1->out2in.addr.as_u32;
- sum1 = ip1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t,
- src_address);
- if (PREDICT_FALSE (is_twice_nat_session (s1)))
- sum1 = ip_csum_update (sum1, ip1->dst_address.as_u32,
- s1->ext_host_addr.as_u32, ip4_header_t,
- dst_address);
- ip1->checksum = ip_csum_fold (sum1);
-
- old_port1 = udp1->src_port;
- new_port1 = udp1->src_port = s1->out2in.port;
-
- if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP))
- {
- sum1 = tcp1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t,
- dst_address);
- sum1 = ip_csum_update (sum1, old_port1, new_port1, ip4_header_t,
- length);
- if (PREDICT_FALSE (is_twice_nat_session (s1)))
- {
- sum1 = ip_csum_update (sum1, ip1->dst_address.as_u32,
- s1->ext_host_addr.as_u32,
- ip4_header_t, dst_address);
- sum1 = ip_csum_update (sum1, tcp1->dst_port,
- s1->ext_host_port, ip4_header_t,
- length);
- tcp1->dst_port = s1->ext_host_port;
- ip1->dst_address.as_u32 = s1->ext_host_addr.as_u32;
- }
- tcp1->checksum = ip_csum_fold (sum1);
- mss_clamping (sm, tcp1, &sum1);
- tcp_packets++;
- if (nat44_set_tcp_session_state_i2o
- (sm, s1, tcp1, thread_index))
- goto trace01;
- }
- else if (udp1->checksum)
- {
- sum1 = udp1->checksum;
- sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t,
- dst_address);
- sum1 = ip_csum_update (sum1, old_port1, new_port1, ip4_header_t,
- length);
-
- if (PREDICT_FALSE (is_twice_nat_session (s1)))
- {
- sum1 = ip_csum_update (sum1, ip1->dst_address.as_u32,
- s1->ext_host_addr.as_u32,
- ip4_header_t, dst_address);
- sum1 = ip_csum_update (sum1, tcp1->dst_port,
- s1->ext_host_port, ip4_header_t,
- length);
- udp1->dst_port = s1->ext_host_port;
- ip1->dst_address.as_u32 = s1->ext_host_addr.as_u32;
- }
- udp1->checksum = ip_csum_fold (sum1);
- udp_packets++;
- }
- else
- {
- if (PREDICT_FALSE (is_twice_nat_session (s1)))
- {
- udp1->dst_port = s1->ext_host_port;
- ip1->dst_address.as_u32 = s1->ext_host_addr.as_u32;
- }
- udp_packets++;
- }
-
- /* Accounting */
- nat44_session_update_counters (s1, now,
- vlib_buffer_length_in_chain (vm, b1),
- thread_index);
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s1, thread_index);
-
- trace01:
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b1->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat_in2out_ed_trace_t *t =
- vlib_add_trace (vm, node, b1, sizeof (*t));
- t->is_slow_path = is_slow_path;
- t->sw_if_index = sw_if_index1;
- t->next_index = next1;
- t->session_index = ~0;
- if (s1)
- t->session_index = s1 - tsm->sessions;
- }
-
- pkts_processed += next1 == NAT_IN2OUT_ED_NEXT_LOOKUP;
-
- /* verify speculative enqueues, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, next0, next1);
- }
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
- next0 = NAT_IN2OUT_ED_NEXT_LOOKUP;
if (is_output_feature)
- iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
+ iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
+
+ next0 = vnet_buffer2 (b0)->nat.arc_next;
ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
iph_offset0);
icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
ICMP4_time_exceeded_ttl_exceeded_in_transit,
0);
- next0 = NAT_IN2OUT_ED_NEXT_ICMP_ERROR;
+ next0 = NAT_NEXT_ICMP_ERROR;
goto trace0;
}
icmp0 = (icmp46_header_t *) udp0;
proto0 = ip_proto_to_snat_proto (ip0->protocol);
- if (is_slow_path)
+ if (PREDICT_FALSE (proto0 == ~0))
{
- if (PREDICT_FALSE (proto0 == ~0))
- {
- s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0,
- rx_fib_index0,
- thread_index, now, vm,
- node);
- if (!s0)
- next0 = NAT_IN2OUT_ED_NEXT_DROP;
- other_packets++;
- goto trace0;
- }
-
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = icmp_in2out_ed_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
- icmp_packets++;
- goto trace0;
- }
+ s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0,
+ rx_fib_index0,
+ thread_index, now,
+ vm, node);
+ if (!s0)
+ next0 = NAT_NEXT_DROP;
+
+ other_packets++;
+ goto trace0;
}
- else
+
+ if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
{
- if (PREDICT_FALSE (proto0 == ~0))
- {
- next0 = NAT_IN2OUT_ED_NEXT_SLOW_PATH;
- goto trace0;
- }
+ next0 = icmp_in2out_ed_slow_path
+ (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0,
+ node, next0, now, thread_index, &s0);
+ icmp_packets++;
+ goto trace0;
+ }
- if (ip4_is_fragment (ip0))
- {
- next0 = NAT_IN2OUT_ED_NEXT_REASS;
- fragments++;
- goto trace0;
- }
+ // move down
+ make_ed_kv (&ip0->src_address, &ip0->dst_address,
+ ip0->protocol, rx_fib_index0,
+ vnet_buffer (b0)->ip.reass.l4_src_port,
+ vnet_buffer (b0)->ip.reass.l4_dst_port, ~0ULL, &kv0);
- if (is_output_feature)
- {
- if (PREDICT_FALSE
- (nat_not_translate_output_feature_fwd
- (sm, ip0, thread_index, now, vm, b0)))
- goto trace0;
- }
+ if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
+ {
+ s0 = pool_elt_at_index (tsm->sessions, value0.value);
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ if (s0->tcp_close_timestamp && now >= s0->tcp_close_timestamp)
{
- next0 = NAT_IN2OUT_ED_NEXT_SLOW_PATH;
- goto trace0;
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat44_ed_delete_session (sm, s0, thread_index, 1);
+ s0 = NULL;
}
}
- make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address,
- ip0->protocol, rx_fib_index0, udp0->src_port,
- udp0->dst_port);
-
- if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
+ if (!s0)
{
- if (is_slow_path)
+ if (is_output_feature)
{
- if (is_output_feature)
- {
- if (PREDICT_FALSE
- (nat44_ed_not_translate_output_feature
- (sm, ip0, ip0->protocol, udp0->src_port,
- udp0->dst_port, thread_index, sw_if_index0,
- vnet_buffer (b0)->sw_if_index[VLIB_TX])))
- goto trace0;
- }
- else
- {
- if (PREDICT_FALSE (nat44_ed_not_translate (sm, node,
- sw_if_index0,
- ip0, proto0,
- rx_fib_index0,
- thread_index)))
- goto trace0;
- }
-
- next0 =
- slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node,
- next0, thread_index, now, tcp0);
-
- if (PREDICT_FALSE (next0 == NAT_IN2OUT_ED_NEXT_DROP))
+ if (PREDICT_FALSE
+ (nat44_ed_not_translate_output_feature
+ (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port,
+ vnet_buffer (b0)->ip.reass.l4_dst_port, thread_index,
+ sw_if_index0,
+ vnet_buffer (b0)->sw_if_index[VLIB_TX])))
goto trace0;
- if (PREDICT_FALSE (!s0))
+ /*
+ * Send DHCP packets to the ipv4 stack, or we won't
+ * be able to use dhcp client on the outside interface
+ */
+ if (PREDICT_FALSE
+ (proto0 == SNAT_PROTOCOL_UDP
+ && (vnet_buffer (b0)->ip.reass.l4_dst_port ==
+ clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_server))
+ && ip0->dst_address.as_u32 == 0xffffffff))
goto trace0;
}
else
{
- next0 = NAT_IN2OUT_ED_NEXT_SLOW_PATH;
- goto trace0;
+ if (PREDICT_FALSE
+ (nat44_ed_not_translate
+ (sm, node, sw_if_index0, ip0, proto0, rx_fib_index0,
+ thread_index)))
+ goto trace0;
}
- }
- else
- {
- s0 = pool_elt_at_index (tsm->sessions, value0.value);
+
+ next0 =
+ slow_path_ed (sm, b0, ip0->src_address, ip0->dst_address,
+ vnet_buffer (b0)->ip.reass.l4_src_port,
+ vnet_buffer (b0)->ip.reass.l4_dst_port,
+ ip0->protocol, rx_fib_index0, &s0, node, next0,
+ thread_index, now);
+
+ if (PREDICT_FALSE (next0 == NAT_NEXT_DROP))
+ goto trace0;
+
+ if (PREDICT_FALSE (!s0))
+ goto trace0;
+
}
b0->flags |= VNET_BUFFER_F_IS_NATED;
dst_address);
ip0->checksum = ip_csum_fold (sum0);
- old_port0 = udp0->src_port;
- new_port0 = udp0->src_port = s0->out2in.port;
+ old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
{
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
- length);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
- s0->ext_host_addr.as_u32,
- ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, tcp0->dst_port,
- s0->ext_host_port, ip4_header_t,
- length);
- tcp0->dst_port = s0->ext_host_port;
- ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
+ new_port0 = udp0->src_port = s0->out2in.port;
+ sum0 = tcp0->checksum;
+ sum0 =
+ ip_csum_update (sum0, old_addr0, new_addr0,
+ ip4_header_t, dst_address);
+ sum0 =
+ ip_csum_update (sum0, old_port0, new_port0,
+ ip4_header_t, length);
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ {
+ sum0 =
+ ip_csum_update (sum0, ip0->dst_address.as_u32,
+ s0->ext_host_addr.as_u32,
+ ip4_header_t, dst_address);
+ sum0 =
+ ip_csum_update (sum0,
+ vnet_buffer (b0)->ip.
+ reass.l4_dst_port, s0->ext_host_port,
+ ip4_header_t, length);
+ tcp0->dst_port = s0->ext_host_port;
+ ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
+ }
+ mss_clamping (sm, tcp0, &sum0);
+ tcp0->checksum = ip_csum_fold (sum0);
}
- mss_clamping (sm, tcp0, &sum0);
- tcp0->checksum = ip_csum_fold (sum0);
tcp_packets++;
if (nat44_set_tcp_session_state_i2o
- (sm, s0, tcp0, thread_index))
+ (sm, now, s0, b0, thread_index))
goto trace0;
}
- else if (udp0->checksum)
+ else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
+ && udp0->checksum)
{
+ new_port0 = udp0->src_port = s0->out2in.port;
sum0 = udp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
- length);
+ sum0 =
+ ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
+ dst_address);
+ sum0 =
+ ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
+ length);
if (PREDICT_FALSE (is_twice_nat_session (s0)))
{
sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
s0->ext_host_addr.as_u32,
ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, tcp0->dst_port,
- s0->ext_host_port, ip4_header_t,
- length);
+ sum0 =
+ ip_csum_update (sum0,
+ vnet_buffer (b0)->ip.reass.l4_dst_port,
+ s0->ext_host_port, ip4_header_t, length);
udp0->dst_port = s0->ext_host_port;
ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
}
}
else
{
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
{
- udp0->dst_port = s0->ext_host_port;
- ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
+ new_port0 = udp0->src_port = s0->out2in.port;
+ if (PREDICT_FALSE (is_twice_nat_session (s0)))
+ {
+ udp0->dst_port = s0->ext_host_port;
+ ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
+ }
+ udp_packets++;
}
- udp_packets++;
}
/* Accounting */
nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm, b0),
- thread_index);
+ vlib_buffer_length_in_chain
+ (vm, b0), thread_index);
/* Per-user LRU list maintenance */
nat44_session_update_lru (sm, s0, thread_index);
{
nat_in2out_ed_trace_t *t =
vlib_add_trace (vm, node, b0, sizeof (*t));
- t->is_slow_path = is_slow_path;
t->sw_if_index = sw_if_index0;
t->next_index = next0;
- t->session_index = ~0;
+ t->is_slow_path = 1;
+
if (s0)
t->session_index = s0 - tsm->sessions;
+ else
+ t->session_index = ~0;
}
- pkts_processed += next0 == NAT_IN2OUT_ED_NEXT_LOOKUP;
+ pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next;
/* verify speculative enqueue, maybe switch current next frame */
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
vlib_node_increment_counter (vm, stats_node_index,
NAT_IN2OUT_ED_ERROR_TCP_PACKETS, tcp_packets);
vlib_node_increment_counter (vm, stats_node_index,
- NAT_IN2OUT_ED_ERROR_UDP_PACKETS, tcp_packets);
+ NAT_IN2OUT_ED_ERROR_UDP_PACKETS, udp_packets);
vlib_node_increment_counter (vm, stats_node_index,
NAT_IN2OUT_ED_ERROR_ICMP_PACKETS,
icmp_packets);
vlib_node_increment_counter (vm, stats_node_index,
NAT_IN2OUT_ED_ERROR_OTHER_PACKETS,
other_packets);
- vlib_node_increment_counter (vm, stats_node_index,
- NAT_IN2OUT_ED_ERROR_FRAGMENTS, fragments);
-
return frame->n_vectors;
}
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- return nat44_ed_in2out_node_fn_inline (vm, node, frame, 0, 0);
+ return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 0);
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (nat44_ed_in2out_node) = {
.name = "nat44-ed-in2out",
.vector_size = sizeof (u32),
+ .sibling_of = "nat-default",
.format_trace = format_nat_in2out_ed_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
.error_strings = nat_in2out_ed_error_strings,
.runtime_data_bytes = sizeof (snat_runtime_t),
- .n_next_nodes = NAT_IN2OUT_ED_N_NEXT,
- .next_nodes = {
- [NAT_IN2OUT_ED_NEXT_DROP] = "error-drop",
- [NAT_IN2OUT_ED_NEXT_LOOKUP] = "ip4-lookup",
- [NAT_IN2OUT_ED_NEXT_SLOW_PATH] = "nat44-ed-in2out-slowpath",
- [NAT_IN2OUT_ED_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [NAT_IN2OUT_ED_NEXT_REASS] = "nat44-ed-in2out-reass",
- },
};
/* *INDENT-ON* */
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- return nat44_ed_in2out_node_fn_inline (vm, node, frame, 0, 1);
+ return nat44_ed_in2out_fast_path_node_fn_inline (vm, node, frame, 1);
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (nat44_ed_in2out_output_node) = {
.name = "nat44-ed-in2out-output",
.vector_size = sizeof (u32),
+ .sibling_of = "nat-default",
.format_trace = format_nat_in2out_ed_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
.error_strings = nat_in2out_ed_error_strings,
.runtime_data_bytes = sizeof (snat_runtime_t),
- .n_next_nodes = NAT_IN2OUT_ED_N_NEXT,
- .next_nodes = {
- [NAT_IN2OUT_ED_NEXT_DROP] = "error-drop",
- [NAT_IN2OUT_ED_NEXT_LOOKUP] = "interface-output",
- [NAT_IN2OUT_ED_NEXT_SLOW_PATH] = "nat44-ed-in2out-output-slowpath",
- [NAT_IN2OUT_ED_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [NAT_IN2OUT_ED_NEXT_REASS] = "nat44-ed-in2out-reass-output",
- },
};
/* *INDENT-ON* */
VLIB_NODE_FN (nat44_ed_in2out_slowpath_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+ vlib_node_runtime_t *
+ node, vlib_frame_t * frame)
{
- return nat44_ed_in2out_node_fn_inline (vm, node, frame, 1, 0);
+ return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 0);
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (nat44_ed_in2out_slowpath_node) = {
.name = "nat44-ed-in2out-slowpath",
.vector_size = sizeof (u32),
+ .sibling_of = "nat-default",
.format_trace = format_nat_in2out_ed_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
.error_strings = nat_in2out_ed_error_strings,
.runtime_data_bytes = sizeof (snat_runtime_t),
- .n_next_nodes = NAT_IN2OUT_ED_N_NEXT,
- .next_nodes = {
- [NAT_IN2OUT_ED_NEXT_DROP] = "error-drop",
- [NAT_IN2OUT_ED_NEXT_LOOKUP] = "ip4-lookup",
- [NAT_IN2OUT_ED_NEXT_SLOW_PATH] = "nat44-ed-in2out-slowpath",
- [NAT_IN2OUT_ED_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [NAT_IN2OUT_ED_NEXT_REASS] = "nat44-ed-in2out-reass",
- },
};
/* *INDENT-ON* */
VLIB_NODE_FN (nat44_ed_in2out_output_slowpath_node) (vlib_main_t * vm,
- vlib_node_runtime_t *
- node,
+ vlib_node_runtime_t
+ * node,
vlib_frame_t * frame)
{
- return nat44_ed_in2out_node_fn_inline (vm, node, frame, 1, 1);
+ return nat44_ed_in2out_slow_path_node_fn_inline (vm, node, frame, 1);
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (nat44_ed_in2out_output_slowpath_node) = {
.name = "nat44-ed-in2out-output-slowpath",
.vector_size = sizeof (u32),
+ .sibling_of = "nat-default",
.format_trace = format_nat_in2out_ed_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
.error_strings = nat_in2out_ed_error_strings,
.runtime_data_bytes = sizeof (snat_runtime_t),
- .n_next_nodes = NAT_IN2OUT_ED_N_NEXT,
- .next_nodes = {
- [NAT_IN2OUT_ED_NEXT_DROP] = "error-drop",
- [NAT_IN2OUT_ED_NEXT_LOOKUP] = "interface-output",
- [NAT_IN2OUT_ED_NEXT_SLOW_PATH] = "nat44-ed-in2out-output-slowpath",
- [NAT_IN2OUT_ED_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [NAT_IN2OUT_ED_NEXT_REASS] = "nat44-ed-in2out-reass",
- },
};
/* *INDENT-ON* */
-static inline uword
-nat44_ed_in2out_reass_node_fn_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame,
- int is_output_feature)
-{
- u32 n_left_from, *from, *to_next;
- nat_in2out_ed_next_t next_index;
- u32 pkts_processed = 0, cached_fragments = 0;
- snat_main_t *sm = &snat_main;
- f64 now = vlib_time_now (vm);
- u32 thread_index = vm->thread_index;
- snat_main_per_thread_data_t *per_thread_data =
- &sm->per_thread_data[thread_index];
- u32 *fragments_to_drop = 0;
- u32 *fragments_to_loopback = 0;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0;
- u32 iph_offset0 = 0;
- vlib_buffer_t *b0;
- u32 next0;
- u8 cached0 = 0;
- ip4_header_t *ip0 = 0;
- nat_reass_ip4_t *reass0;
- udp_header_t *udp0;
- tcp_header_t *tcp0;
- icmp46_header_t *icmp0;
- clib_bihash_kv_16_8_t kv0, value0;
- snat_session_t *s0 = 0;
- u16 old_port0, new_port0;
- ip_csum_t sum0;
-
- /* 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);
-
- next0 = NAT_IN2OUT_ED_NEXT_LOOKUP;
-
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- rx_fib_index0 =
- fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4,
- sw_if_index0);
-
- if (PREDICT_FALSE (nat_reass_is_drop_frag (0)))
- {
- next0 = NAT_IN2OUT_ED_NEXT_DROP;
- b0->error = node->errors[NAT_IN2OUT_ED_ERROR_DROP_FRAGMENT];
- goto trace0;
- }
-
- if (is_output_feature)
- iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length;
-
- ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
- iph_offset0);
-
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- icmp0 = (icmp46_header_t *) udp0;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
-
- reass0 = nat_ip4_reass_find_or_create (ip0->src_address,
- ip0->dst_address,
- ip0->fragment_id,
- ip0->protocol,
- 1, &fragments_to_drop);
-
- if (PREDICT_FALSE (!reass0))
- {
- next0 = NAT_IN2OUT_ED_NEXT_DROP;
- b0->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_REASS];
- nat_elog_notice ("maximum reassemblies exceeded");
- goto trace0;
- }
-
- if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
- {
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- if (is_output_feature)
- {
- if (PREDICT_FALSE
- (nat_not_translate_output_feature_fwd
- (sm, ip0, thread_index, now, vm, b0)))
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- goto trace0;
- }
-
- next0 = icmp_in2out_ed_slow_path
- (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node,
- next0, now, thread_index, &s0);
-
- if (PREDICT_TRUE (next0 != NAT_IN2OUT_ED_NEXT_DROP))
- {
- if (s0)
- reass0->sess_index = s0 - per_thread_data->sessions;
- else
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- nat_ip4_reass_get_frags (reass0,
- &fragments_to_loopback);
- }
-
- goto trace0;
- }
-
- make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address,
- ip0->protocol, rx_fib_index0, udp0->src_port,
- udp0->dst_port);
-
- if (clib_bihash_search_16_8
- (&per_thread_data->in2out_ed, &kv0, &value0))
- {
- if (is_output_feature)
- {
- if (PREDICT_FALSE
- (nat44_ed_not_translate_output_feature
- (sm, ip0, ip0->protocol, udp0->src_port,
- udp0->dst_port, thread_index, sw_if_index0,
- vnet_buffer (b0)->sw_if_index[VLIB_TX])))
- {
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- nat_ip4_reass_get_frags (reass0,
- &fragments_to_loopback);
- goto trace0;
- }
- }
- else
- {
- if (PREDICT_FALSE (nat44_ed_not_translate (sm, node,
- sw_if_index0,
- ip0, proto0,
- rx_fib_index0,
- thread_index)))
- {
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- nat_ip4_reass_get_frags (reass0,
- &fragments_to_loopback);
- goto trace0;
- }
- }
-
- next0 = slow_path_ed (sm, b0, rx_fib_index0, &kv0,
- &s0, node, next0, thread_index, now,
- tcp0);
-
- if (PREDICT_FALSE (next0 == NAT_IN2OUT_ED_NEXT_DROP))
- goto trace0;
-
- if (PREDICT_FALSE (!s0))
- {
- reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE;
- goto trace0;
- }
-
- reass0->sess_index = s0 - per_thread_data->sessions;
- }
- else
- {
- s0 = pool_elt_at_index (per_thread_data->sessions,
- value0.value);
- reass0->sess_index = value0.value;
- }
- nat_ip4_reass_get_frags (reass0, &fragments_to_loopback);
- }
- else
- {
- if (reass0->flags & NAT_REASS_FLAG_ED_DONT_TRANSLATE)
- goto trace0;
- if (PREDICT_FALSE (reass0->sess_index == (u32) ~ 0))
- {
- if (nat_ip4_reass_add_fragment
- (thread_index, reass0, bi0, &fragments_to_drop))
- {
- b0->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_FRAG];
- nat_elog_notice
- ("maximum fragments per reassembly exceeded");
- next0 = NAT_IN2OUT_ED_NEXT_DROP;
- goto trace0;
- }
- cached0 = 1;
- goto trace0;
- }
- s0 = pool_elt_at_index (per_thread_data->sessions,
- reass0->sess_index);
- }
-
- old_addr0 = ip0->src_address.as_u32;
- ip0->src_address = s0->out2in.addr;
- new_addr0 = ip0->src_address.as_u32;
- if (!is_output_feature)
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- src_address /* changed member */ );
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
- s0->ext_host_addr.as_u32, ip4_header_t,
- dst_address);
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_FALSE (ip4_is_first_fragment (ip0)))
- {
- old_port0 = udp0->src_port;
- new_port0 = udp0->src_port = s0->out2in.port;
-
- if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
- {
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */ );
- sum0 = ip_csum_update (sum0, old_port0, new_port0,
- ip4_header_t /* cheat */ ,
- length /* changed member */ );
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- {
- sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
- s0->ext_host_addr.as_u32,
- ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, tcp0->dst_port,
- s0->ext_host_port, ip4_header_t,
- length);
- tcp0->dst_port = s0->ext_host_port;
- ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
- }
- tcp0->checksum = ip_csum_fold (sum0);
- }
- else if (udp0->checksum)
- {
- sum0 = udp0->checksum;
- sum0 =
- ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- dst_address);
- sum0 =
- ip_csum_update (sum0, old_port0, new_port0, ip4_header_t,
- length);
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- {
- sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32,
- s0->ext_host_addr.as_u32,
- ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, tcp0->dst_port,
- s0->ext_host_port, ip4_header_t,
- length);
- udp0->dst_port = s0->ext_host_port;
- ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
- }
- udp0->checksum = ip_csum_fold (sum0);
- }
- else
- {
- if (PREDICT_FALSE (is_twice_nat_session (s0)))
- {
- udp0->dst_port = s0->ext_host_port;
- ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
- }
- }
- }
-
- /* Hairpinning */
- nat44_reass_hairpinning (sm, b0, ip0, s0->out2in.port,
- s0->ext_host_port, proto0, 1);
-
- /* Accounting */
- nat44_session_update_counters (s0, now,
- vlib_buffer_length_in_chain (vm, b0),
- thread_index);
- /* Per-user LRU list maintenance */
- nat44_session_update_lru (sm, s0, thread_index);
-
- trace0:
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat44_reass_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->cached = cached0;
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- }
-
- if (cached0)
- {
- n_left_to_next++;
- to_next--;
- cached_fragments++;
- }
- else
- {
- pkts_processed += next0 != NAT_IN2OUT_ED_NEXT_DROP;
-
- /* 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);
- }
-
- if (n_left_from == 0 && vec_len (fragments_to_loopback))
- {
- from = vlib_frame_vector_args (frame);
- u32 len = vec_len (fragments_to_loopback);
- if (len <= VLIB_FRAME_SIZE)
- {
- clib_memcpy_fast (from, fragments_to_loopback,
- sizeof (u32) * len);
- n_left_from = len;
- vec_reset_length (fragments_to_loopback);
- }
- else
- {
- clib_memcpy_fast (from, fragments_to_loopback +
- (len - VLIB_FRAME_SIZE),
- sizeof (u32) * VLIB_FRAME_SIZE);
- n_left_from = VLIB_FRAME_SIZE;
- _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
- }
- }
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- vlib_node_increment_counter (vm, sm->ed_in2out_reass_node_index,
- NAT_IN2OUT_ED_ERROR_PROCESSED_FRAGMENTS,
- pkts_processed);
- vlib_node_increment_counter (vm, sm->ed_in2out_reass_node_index,
- NAT_IN2OUT_ED_ERROR_CACHED_FRAGMENTS,
- cached_fragments);
-
- nat_send_all_to_node (vm, fragments_to_drop, node,
- &node->errors[NAT_IN2OUT_ED_ERROR_DROP_FRAGMENT],
- NAT_IN2OUT_ED_NEXT_DROP);
-
- vec_free (fragments_to_drop);
- vec_free (fragments_to_loopback);
- return frame->n_vectors;
-}
-
-VLIB_NODE_FN (nat44_ed_in2out_reass_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+static u8 *
+format_nat_pre_trace (u8 * s, va_list * args)
{
- return nat44_ed_in2out_reass_node_fn_inline (vm, node, frame, 0);
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ nat_pre_trace_t *t = va_arg (*args, nat_pre_trace_t *);
+ return format (s, "in2out next_index %d", t->next_index);
}
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (nat44_ed_in2out_reass_node) = {
- .name = "nat44-ed-in2out-reass",
- .vector_size = sizeof (u32),
- .format_trace = format_nat44_reass_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
- .error_strings = nat_in2out_ed_error_strings,
- .n_next_nodes = NAT_IN2OUT_ED_N_NEXT,
- .next_nodes = {
- [NAT_IN2OUT_ED_NEXT_DROP] = "error-drop",
- [NAT_IN2OUT_ED_NEXT_LOOKUP] = "ip4-lookup",
- [NAT_IN2OUT_ED_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
- [NAT_IN2OUT_ED_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [NAT_IN2OUT_ED_NEXT_REASS] = "nat44-ed-in2out-reass",
- },
-};
-/* *INDENT-ON* */
-
-VLIB_NODE_FN (nat44_ed_in2out_reass_output_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+VLIB_NODE_FN (nat_pre_in2out_node)
+ (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
{
- return nat44_ed_in2out_reass_node_fn_inline (vm, node, frame, 1);
+ return nat_pre_node_fn_inline (vm, node, frame,
+ NAT_NEXT_IN2OUT_ED_FAST_PATH);
}
/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (nat44_ed_in2out_reass_output_node) = {
- .name = "nat44-ed-in2out-reass-output",
+VLIB_REGISTER_NODE (nat_pre_in2out_node) = {
+ .name = "nat-pre-in2out",
.vector_size = sizeof (u32),
- .format_trace = format_nat44_reass_trace,
+ .sibling_of = "nat-default",
+ .format_trace = format_nat_pre_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN (nat_in2out_ed_error_strings),
- .error_strings = nat_in2out_ed_error_strings,
- .n_next_nodes = NAT_IN2OUT_ED_N_NEXT,
- .next_nodes = {
- [NAT_IN2OUT_ED_NEXT_DROP] = "error-drop",
- [NAT_IN2OUT_ED_NEXT_LOOKUP] = "interface-output",
- [NAT_IN2OUT_ED_NEXT_SLOW_PATH] = "nat44-in2out-slowpath",
- [NAT_IN2OUT_ED_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [NAT_IN2OUT_ED_NEXT_REASS] = "nat44-ed-in2out-reass",
- },
+ .n_errors = 0,
};
/* *INDENT-ON* */
Code Review / vpp.git / blobdiff