#include <vlib/vlib.h>
#include <vnet/vnet.h>
-#include <vnet/pg/pg.h>
#include <vnet/ip/ip.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/fib/ip4_fib.h>
-#include <vnet/udp/udp.h>
+#include <vnet/udp/udp_local.h>
#include <vppinfra/error.h>
#include <nat/nat.h>
-#include <nat/nat_ipfix_logging.h>
+#include <nat/lib/ipfix_logging.h>
#include <nat/nat_inlines.h>
#include <nat/nat44/inlines.h>
-#include <nat/nat_syslog.h>
-#include <nat/nat_ha.h>
+#include <nat/lib/nat_syslog.h>
+#include <nat/nat44/ed_inlines.h>
+#include <nat/lib/nat_inlines.h>
+
+/* number of attempts to get a port for ED overloading algorithm, if rolling
+ * a dice this many times doesn't produce a free port, it's treated
+ * as if there were no free ports available to conserve resources */
+#define ED_PORT_ALLOC_ATTEMPTS (10)
static char *nat_in2out_ed_error_strings[] = {
#define _(sym,string) string,
u32 sw_if_index;
u32 next_index;
u32 session_index;
- u32 is_slow_path;
+ nat_translation_error_e translation_error;
+ nat_6t_flow_t i2of;
+ nat_6t_flow_t o2if;
+ clib_bihash_kv_16_8_t search_key;
+ u8 is_slow_path;
+ u8 translation_via_i2of;
+ u8 lookup_skipped;
} nat_in2out_ed_trace_t;
static u8 *
s = format (s, "%s: sw_if_index %d, next index %d, session %d", tag,
t->sw_if_index, t->next_index, t->session_index);
-
- return s;
-}
-
-#ifndef CLIB_MARCH_VARIANT
-int
-nat44_i2o_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg)
-{
- snat_main_t *sm = &snat_main;
- nat44_is_idle_session_ctx_t *ctx = arg;
- snat_session_t *s;
- u64 sess_timeout_time;
- 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;
- snat_session_key_t key;
- snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
- ctx->thread_index);
-
- s = pool_elt_at_index (tsm->sessions, kv->value);
- sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s);
- if (ctx->now >= sess_timeout_time)
+ if (~0 != t->session_index)
{
- if (is_fwd_bypass_session (s))
- goto delete;
-
- l_addr = &s->out2in.addr;
- r_addr = &s->ext_host_addr;
- fib_index = s->out2in.fib_index;
- if (snat_is_unk_proto_session (s))
+ s = format (s, ", translation result '%U' via %s",
+ format_nat_ed_translation_error, t->translation_error,
+ t->translation_via_i2of ? "i2of" : "o2if");
+ s = format (s, "\n i2of %U", format_nat_6t_flow, &t->i2of);
+ s = format (s, "\n o2if %U", format_nat_6t_flow, &t->o2if);
+ }
+ if (!t->is_slow_path)
+ {
+ if (t->lookup_skipped)
{
- proto = s->in2out.port;
- r_port = 0;
- l_port = 0;
+ s = format (s, "\n lookup skipped - cached session index used");
}
else
{
- proto = snat_proto_to_ip_proto (s->in2out.protocol);
- l_port = s->out2in.port;
- r_port = s->ext_host_port;
+ s = format (s, "\n search key %U", format_ed_session_kvp,
+ &t->search_key);
}
- 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");
-
- if (snat_is_unk_proto_session (s))
- goto delete;
-
- snat_ipfix_logging_nat44_ses_delete (ctx->thread_index,
- s->in2out.addr.as_u32,
- s->out2in.addr.as_u32,
- s->in2out.protocol,
- s->in2out.port,
- s->out2in.port,
- s->in2out.fib_index);
-
- nat_syslog_nat44_sdel (s->user_index, s->in2out.fib_index,
- &s->in2out.addr, s->in2out.port,
- &s->ext_host_nat_addr, s->ext_host_nat_port,
- &s->out2in.addr, s->out2in.port,
- &s->ext_host_addr, s->ext_host_port,
- s->in2out.protocol, is_twice_nat_session (s));
-
- nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr,
- s->ext_host_port, s->out2in.protocol, s->out2in.fib_index,
- ctx->thread_index);
-
- if (is_twice_nat_session (s))
- {
- for (i = 0; i < vec_len (sm->twice_nat_addresses); i++)
- {
- key.protocol = s->in2out.protocol;
- key.port = s->ext_host_nat_port;
- a = sm->twice_nat_addresses + i;
- if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32)
- {
- snat_free_outside_address_and_port (sm->twice_nat_addresses,
- ctx->thread_index,
- &key);
- break;
- }
- }
- }
-
- if (snat_is_session_static (s))
- goto delete;
-
- snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
- &s->out2in);
- delete:
- nat44_ed_delete_session (sm, s, ctx->thread_index, 1);
- return 1;
- }
-
- return 0;
-}
-#endif
-
-static inline u32
-icmp_in2out_ed_slow_path (snat_main_t * sm, vlib_buffer_t * b0,
- ip4_header_t * ip0, icmp46_header_t * icmp0,
- u32 sw_if_index0, u32 rx_fib_index0,
- vlib_node_runtime_t * node, u32 next0, f64 now,
- u32 thread_index, snat_session_t ** p_s0)
-{
- vlib_main_t *vm = vlib_get_main ();
-
- 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_NEXT_DROP && s0))
- {
- /* 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);
}
- 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);
+ return s;
}
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)
+nat_ed_alloc_addr_and_port (snat_main_t *sm, u32 rx_fib_index, u32 nat_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 *outside_addr, u16 *outside_port)
{
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)
+ switch (nat_proto)
{
#define _(N, j, n, unused) \
- case SNAT_PROTOCOL_##N: \
+ case NAT_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; \
- } \
+ s->o2i.match.daddr = a->addr; \
+ /* first try port suggested by caller */ \
+ u16 port = clib_net_to_host_u16 (*outside_port); \
+ u16 port_offset = port - port_thread_offset; \
+ if (port <= port_thread_offset || \
+ port > port_thread_offset + port_per_thread) \
+ { \
+ /* need to pick a different port, suggested port doesn't fit in \
+ * this thread's port range */ \
+ port_offset = snat_random_port (0, port_per_thread - 1); \
+ port = port_thread_offset + port_offset; \
+ } \
+ u16 attempts = ED_PORT_ALLOC_ATTEMPTS; \
+ do \
+ { \
+ if (NAT_PROTOCOL_ICMP == nat_proto) \
+ { \
+ s->o2i.match.sport = clib_host_to_net_u16 (port); \
+ } \
+ s->o2i.match.dport = clib_host_to_net_u16 (port); \
+ if (0 == \
+ nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 2)) \
+ { \
+ ++a->busy_##n##_port_refcounts[port]; \
+ a->busy_##n##_ports_per_thread[thread_index]++; \
+ a->busy_##n##_ports++; \
+ *outside_addr = a->addr; \
+ *outside_port = clib_host_to_net_u16 (port); \
+ return 0; \
+ } \
+ port_offset = snat_random_port (0, port_per_thread - 1); \
+ port = port_thread_offset + port_offset; \
+ --attempts; \
+ } \
+ while (attempts > 0); \
} \
else if (a->fib_index == ~0) \
{ \
- ga = a; \
+ ga = a; \
} \
break;
- foreach_snat_protocol;
+ foreach_nat_protocol;
default:
nat_elog_info ("unknown protocol");
return 1;
/* fake fib_index to reuse macro */
rx_fib_index = ~0;
a = ga;
- switch (snat_proto)
+ switch (nat_proto)
{
- foreach_snat_protocol;
+ foreach_nat_protocol;
default:
nat_elog_info ("unknown protocol");
return 1;
#undef _
/* Totally out of translations to use... */
- snat_ipfix_logging_addresses_exhausted (thread_index, 0);
+ nat_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,
- snat_session_t ** sessionp,
- vlib_node_runtime_t * node, u32 next, u32 thread_index, f64 now)
+static_always_inline u32
+nat_outside_fib_index_lookup (snat_main_t * sm, ip4_address_t addr)
{
- snat_session_t *s = NULL;
- snat_session_key_t key0, key1;
- lb_nat_type_t lb = 0;
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- 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;
- ip4_address_t allocated_addr;
- u16 allocated_port;
- u8 identity_nat;
+ nat_outside_fib_t *outside_fib;
fib_prefix_t pfx = {
.fp_proto = FIB_PROTOCOL_IP4,
.fp_len = 32,
- .fp_addr = {.ip4.as_u32 = r_addr.as_u32,},
+ .fp_addr = {.ip4.as_u32 = addr.as_u32,}
+ ,
};
- nat44_is_idle_session_ctx_t ctx;
+ // TODO: multiple vrfs none can resolve addr
+ /* *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)
+ {
+ return outside_fib->fib_index;
+ }
+ }
+ }
+ /* *INDENT-ON* */
+ return ~0;
+}
+
+static_always_inline int
+nat44_ed_external_sm_lookup (snat_main_t *sm, ip4_address_t match_addr,
+ u16 match_port, nat_protocol_t match_protocol,
+ u32 match_fib_index, ip4_address_t *daddr,
+ u16 *dport)
+{
+ clib_bihash_kv_8_8_t kv, value;
+ init_nat_k (&kv, match_addr, match_port, match_fib_index, match_protocol);
+ if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value))
+ {
+ /* Try address only mapping */
+ init_nat_k (&kv, match_addr, 0, 0, 0);
+ if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv,
+ &value))
+ return 0;
+ }
+
+ snat_static_mapping_t *m =
+ pool_elt_at_index (sm->static_mappings, value.value);
+ *daddr = m->local_addr;
+ if (dport)
+ {
+ /* Address only mapping doesn't change port */
+ *dport = is_addr_only_static_mapping (m) ? match_port : m->local_port;
+ }
+ return 1;
+}
- if (PREDICT_TRUE (snat_proto == SNAT_PROTOCOL_TCP))
+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, snat_session_t **sessionp,
+ vlib_node_runtime_t *node, u32 next, u32 thread_index, f64 now)
+{
+ snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
+ ip4_address_t outside_addr;
+ u16 outside_port;
+ u32 outside_fib_index;
+ u8 is_identity_nat;
+
+ u32 nat_proto = ip_proto_to_nat_proto (proto);
+ snat_session_t *s = NULL;
+ lb_nat_type_t lb = 0;
+ ip4_address_t daddr = r_addr;
+ u16 dport = r_port;
+
+ if (PREDICT_TRUE (nat_proto == NAT_PROTOCOL_TCP))
{
if (PREDICT_FALSE
(!tcp_flags_is_init
}
}
- // TODO: based on fib index do a lookup
if (PREDICT_FALSE
(nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, thread_index)))
{
- if (!nat_global_lru_free_one (sm, thread_index, now))
+ if (!nat_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_ipfix_logging_max_sessions (thread_index,
+ sm->max_translations_per_thread);
nat_elog_notice ("maximum sessions exceeded");
return NAT_NEXT_DROP;
}
}
- 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;
+ outside_fib_index = sm->outside_fib_index;
+
+ switch (vec_len (sm->outside_fibs))
+ {
+ case 0:
+ outside_fib_index = sm->outside_fib_index;
+ break;
+ case 1:
+ outside_fib_index = sm->outside_fibs[0].fib_index;
+ break;
+ default:
+ outside_fib_index = nat_outside_fib_index_lookup (sm, r_addr);
+ break;
+ }
+ ip4_address_t sm_addr;
+ u16 sm_port;
+ u32 sm_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))
+ int is_sm;
+ if (snat_static_mapping_match (sm, l_addr, l_port, rx_fib_index, nat_proto,
+ &sm_addr, &sm_port, &sm_fib_index, 0, 0, 0,
+ &lb, 0, &is_identity_nat, 0))
+ {
+ is_sm = 0;
+ }
+ else
+ {
+ is_sm = 1;
+ }
+
+ if (PREDICT_FALSE (is_sm && is_identity_nat))
{
- s = nat_ed_session_alloc (sm, thread_index, now);
- if (!s)
+ *sessionp = NULL;
+ return next;
+ }
+
+ s = nat_ed_session_alloc (sm, thread_index, now, proto);
+ ASSERT (s);
+
+ if (!is_sm)
+ {
+ s->in2out.addr = l_addr;
+ s->in2out.port = l_port;
+ s->nat_proto = nat_proto;
+ s->in2out.fib_index = rx_fib_index;
+ s->out2in.fib_index = outside_fib_index;
+
+ // suggest using local port to allocation function
+ outside_port = l_port;
+
+ // hairpinning?
+ int is_hairpinning = nat44_ed_external_sm_lookup (
+ sm, r_addr, r_port, nat_proto, outside_fib_index, &daddr, &dport);
+ s->flags |= is_hairpinning * SNAT_SESSION_FLAG_HAIRPINNING;
+
+ // destination addr/port updated with real values in
+ // nat_ed_alloc_addr_and_port
+ nat_6t_o2i_flow_init (sm, thread_index, s, daddr, dport, daddr, 0,
+ s->out2in.fib_index, proto);
+ nat_6t_flow_daddr_rewrite_set (&s->o2i, l_addr.as_u32);
+ if (NAT_PROTOCOL_ICMP == nat_proto)
{
- nat_elog_warn ("create NAT session failed");
- b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED];
- return NAT_NEXT_DROP;
+ nat_6t_flow_icmp_id_rewrite_set (&s->o2i, l_port);
}
- switch (vec_len (sm->outside_fibs))
+ else
{
- 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;
+ nat_6t_flow_dport_rewrite_set (&s->o2i, l_port);
}
+ nat_6t_flow_txfib_rewrite_set (&s->o2i, rx_fib_index);
- /* Try to create dynamic translation */
- 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))
+ if (nat_ed_alloc_addr_and_port (
+ sm, rx_fib_index, nat_proto, thread_index, daddr, dport, proto,
+ sm->port_per_thread, tsm->snat_thread_index, s, &outside_addr,
+ &outside_port))
{
nat_elog_notice ("addresses exhausted");
b->error = node->errors[NAT_IN2OUT_ED_ERROR_OUT_OF_PORTS];
- nat_free_session_data (sm, s, thread_index, 0);
- nat44_ed_delete_session (sm, s, thread_index, 1);
+ nat_ed_session_delete (sm, s, thread_index, 1);
return NAT_NEXT_DROP;
}
- key1.addr = allocated_addr;
- key1.port = allocated_port;
+ s->out2in.addr = outside_addr;
+ s->out2in.port = outside_port;
}
else
{
- if (PREDICT_FALSE (identity_nat))
+ // static mapping
+ s->out2in.addr = outside_addr = sm_addr;
+ s->out2in.port = outside_port = sm_port;
+ s->in2out.addr = l_addr;
+ s->in2out.port = l_port;
+ s->nat_proto = nat_proto;
+ s->in2out.fib_index = rx_fib_index;
+ s->out2in.fib_index = outside_fib_index;
+ s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
+
+ // hairpinning?
+ int is_hairpinning = nat44_ed_external_sm_lookup (
+ sm, r_addr, r_port, nat_proto, outside_fib_index, &daddr, &dport);
+ s->flags |= is_hairpinning * SNAT_SESSION_FLAG_HAIRPINNING;
+
+ if (NAT_PROTOCOL_ICMP == nat_proto)
{
- *sessionp = s;
- return next;
+ nat_6t_o2i_flow_init (sm, thread_index, s, daddr, sm_port, sm_addr,
+ sm_port, s->out2in.fib_index, proto);
+ nat_6t_flow_icmp_id_rewrite_set (&s->o2i, l_port);
}
- s = nat_ed_session_alloc (sm, thread_index, now);
- if (!s)
+ else
{
- nat_elog_warn ("create NAT session failed");
- b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED];
- return NAT_NEXT_DROP;
+ nat_6t_o2i_flow_init (sm, thread_index, s, daddr, dport, sm_addr,
+ sm_port, s->out2in.fib_index, proto);
+ nat_6t_flow_dport_rewrite_set (&s->o2i, l_port);
}
- switch (vec_len (sm->outside_fibs))
+ nat_6t_flow_daddr_rewrite_set (&s->o2i, l_addr.as_u32);
+ nat_6t_flow_txfib_rewrite_set (&s->o2i, rx_fib_index);
+ if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 2))
{
- 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;
+ nat_elog_notice ("out2in key add failed");
+ goto error;
}
-
- s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
-
-
- 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");
}
if (lb)
s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
s->ext_host_addr = r_addr;
s->ext_host_port = r_port;
- s->in2out = key0;
- s->out2in = key1;
- s->out2in.protocol = key0.protocol;
-
- 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, &in2out_ed_kv,
- nat44_i2o_ed_is_idle_session_cb,
- &ctx))
- nat_elog_notice ("in2out-ed key add failed");
- *sessionp = s;
+ nat_6t_i2o_flow_init (sm, thread_index, s, l_addr, l_port, r_addr, r_port,
+ rx_fib_index, proto);
+ nat_6t_flow_saddr_rewrite_set (&s->i2o, outside_addr.as_u32);
+ nat_6t_flow_daddr_rewrite_set (&s->i2o, daddr.as_u32);
+ if (NAT_PROTOCOL_ICMP == nat_proto)
+ {
+ nat_6t_flow_icmp_id_rewrite_set (&s->i2o, outside_port);
+ }
+ else
+ {
+ nat_6t_flow_sport_rewrite_set (&s->i2o, outside_port);
+ nat_6t_flow_dport_rewrite_set (&s->i2o, dport);
+ }
+ nat_6t_flow_txfib_rewrite_set (&s->i2o, outside_fib_index);
+
+ if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 1))
+ {
+ nat_elog_notice ("in2out key add failed");
+ goto error;
+ }
/* log NAT event */
- snat_ipfix_logging_nat44_ses_create (thread_index,
- s->in2out.addr.as_u32,
- s->out2in.addr.as_u32,
- s->in2out.protocol,
- s->in2out.port,
- s->out2in.port, s->in2out.fib_index);
+ nat_ipfix_logging_nat44_ses_create (thread_index,
+ s->in2out.addr.as_u32,
+ s->out2in.addr.as_u32,
+ s->nat_proto,
+ s->in2out.port,
+ s->out2in.port, s->in2out.fib_index);
nat_syslog_nat44_sadd (s->user_index, s->in2out.fib_index,
&s->in2out.addr, s->in2out.port,
&s->ext_host_nat_addr, s->ext_host_nat_port,
&s->out2in.addr, s->out2in.port,
- &s->ext_host_addr, s->ext_host_port,
- s->in2out.protocol, 0);
+ &s->ext_host_addr, s->ext_host_port, s->nat_proto,
+ 0);
- nat_ha_sadd (&s->in2out.addr, s->in2out.port, &s->out2in.addr,
- s->out2in.port, &s->ext_host_addr, s->ext_host_port,
- &s->ext_host_nat_addr, s->ext_host_nat_port,
- s->in2out.protocol, s->in2out.fib_index, s->flags,
- thread_index, 0);
+ per_vrf_sessions_register_session (s, thread_index);
+ *sessionp = s;
return next;
+error:
+ if (s)
+ {
+ if (!is_sm)
+ {
+ snat_free_outside_address_and_port (sm->addresses, thread_index,
+ &outside_addr, outside_port,
+ nat_proto);
+ }
+ nat_ed_session_delete (sm, s, thread_index, 1);
+ }
+ *sessionp = s = NULL;
+ return NAT_NEXT_DROP;
}
static_always_inline int
u32 rx_fib_index, u32 thread_index)
{
udp_header_t *udp = ip4_next_header (ip);
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
clib_bihash_kv_16_8_t kv, value;
- snat_session_key_t key0, key1;
- make_ed_kv (&ip->dst_address, &ip->src_address, ip->protocol,
- sm->outside_fib_index, udp->dst_port, udp->src_port, ~0ULL,
- &kv);
+ init_ed_k (&kv, ip->dst_address, udp->dst_port, ip->src_address,
+ udp->src_port, sm->outside_fib_index, ip->protocol);
/* NAT packet aimed at external address if has active sessions */
- if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value))
+ if (clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value))
{
- key0.addr = ip->dst_address;
- key0.port = udp->dst_port;
- key0.protocol = proto;
- key0.fib_index = sm->outside_fib_index;
/* or is static mappings */
- if (!snat_static_mapping_match (sm, key0, &key1, 1, 0, 0, 0, 0, 0))
+ ip4_address_t placeholder_addr;
+ u16 placeholder_port;
+ u32 placeholder_fib_index;
+ if (!snat_static_mapping_match
+ (sm, ip->dst_address, udp->dst_port, sm->outside_fib_index, proto,
+ &placeholder_addr, &placeholder_port, &placeholder_fib_index, 1, 0,
+ 0, 0, 0, 0, 0))
return 0;
}
else
if (ip->protocol == IP_PROTOCOL_ICMP)
{
- if (get_icmp_i2o_ed_key (b, ip, 0, ~0ULL, 0, 0, 0, &kv))
+ ip4_address_t lookup_saddr, lookup_daddr;
+ u16 lookup_sport, lookup_dport;
+ u8 lookup_protocol;
+ if (nat_get_icmp_session_lookup_values (b, ip, &lookup_saddr,
+ &lookup_sport, &lookup_daddr,
+ &lookup_dport, &lookup_protocol))
return 0;
+ init_ed_k (&kv, lookup_saddr, lookup_sport, lookup_daddr, lookup_dport,
+ 0, lookup_protocol);
}
else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP)
{
- 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);
+ init_ed_k (&kv, ip->src_address, vnet_buffer (b)->ip.reass.l4_src_port,
+ ip->dst_address, vnet_buffer (b)->ip.reass.l4_dst_port, 0,
+ ip->protocol);
}
else
{
- make_ed_kv (&ip->src_address, &ip->dst_address, ip->protocol, 0, 0,
- 0, ~0ULL, &kv);
+ init_ed_k (&kv, ip->src_address, 0, ip->dst_address, 0, 0,
+ ip->protocol);
}
- if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
+ if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value))
{
- s = pool_elt_at_index (tsm->sessions, value.value);
+ ASSERT (thread_index == ed_value_get_thread_index (&value));
+ s =
+ pool_elt_at_index (tsm->sessions,
+ ed_value_get_session_index (&value));
+
if (is_fwd_bypass_session (s))
{
if (ip->protocol == IP_PROTOCOL_TCP)
{
- if (nat44_set_tcp_session_state_i2o
- (sm, now, s, b, thread_index))
- return 1;
+ nat44_set_tcp_session_state_i2o (sm, now, s, b, thread_index);
}
/* Accounting */
nat44_session_update_counters (s, now,
nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip,
u16 src_port, u16 dst_port,
u32 thread_index, u32 rx_sw_if_index,
- u32 tx_sw_if_index)
+ u32 tx_sw_if_index, f64 now)
{
clib_bihash_kv_16_8_t kv, value;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
u32 tx_fib_index = ip4_fib_table_get_index_for_sw_if_index (tx_sw_if_index);
/* src NAT check */
- 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))
+ init_ed_k (&kv, ip->src_address, src_port, ip->dst_address, dst_port,
+ tx_fib_index, ip->protocol);
+ if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value))
{
- s = pool_elt_at_index (tsm->sessions, value.value);
- if (nat44_is_ses_closed (s))
+ ASSERT (thread_index == ed_value_get_thread_index (&value));
+ s =
+ pool_elt_at_index (tsm->sessions,
+ ed_value_get_session_index (&value));
+ if (nat44_is_ses_closed (s)
+ && (!s->tcp_closed_timestamp || now >= s->tcp_closed_timestamp))
{
nat_free_session_data (sm, s, thread_index, 0);
- nat44_ed_delete_session (sm, s, thread_index, 1);
+ nat_ed_session_delete (sm, s, thread_index, 1);
}
- else
- s->flags |= SNAT_SESSION_FLAG_OUTPUT_FEATURE;
return 1;
}
/* dst NAT check */
- 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))
+ init_ed_k (&kv, ip->dst_address, dst_port, ip->src_address, src_port,
+ rx_fib_index, ip->protocol);
+ if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value))
{
- s = pool_elt_at_index (tsm->sessions, value.value);
+ ASSERT (thread_index == ed_value_get_thread_index (&value));
+ s =
+ pool_elt_at_index (tsm->sessions,
+ ed_value_get_session_index (&value));
+
if (is_fwd_bypass_session (s))
return 0;
/* hairpinning */
/* *INDENT-OFF* */
- pool_foreach (i, sm->output_feature_interfaces,
- ({
+ pool_foreach (i, sm->output_feature_interfaces)
+ {
if ((nat_interface_is_inside (i)) && (rx_sw_if_index == i->sw_if_index))
return 0;
- }));
+ }
/* *INDENT-ON* */
return 1;
}
return 0;
}
-#ifndef CLIB_MARCH_VARIANT
-u32
-icmp_match_in2out_ed (snat_main_t * sm, vlib_node_runtime_t * node,
- u32 thread_index, vlib_buffer_t * b, ip4_header_t * ip,
- u8 * p_proto, snat_session_key_t * p_value,
- u8 * p_dont_translate, void *d, void *e)
+static inline u32
+icmp_in2out_ed_slow_path (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip,
+ icmp46_header_t *icmp, u32 sw_if_index,
+ u32 rx_fib_index, vlib_node_runtime_t *node,
+ u32 next, f64 now, u32 thread_index,
+ nat_protocol_t nat_proto, snat_session_t **s_p)
{
- u32 sw_if_index;
- u32 rx_fib_index;
- 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
vlib_main_t *vm = vlib_get_main ();
- snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
-
- 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);
+ u16 checksum;
+ int err;
+ snat_session_t *s = NULL;
+ u8 lookup_protocol = ip->protocol;
+ u16 lookup_sport, lookup_dport;
+ ip4_address_t lookup_saddr, lookup_daddr;
- err =
- get_icmp_i2o_ed_key (b, ip, rx_fib_index, ~0ULL, p_proto, &l_port,
- &r_port, &kv);
+ err = nat_get_icmp_session_lookup_values (b, ip, &lookup_saddr,
+ &lookup_sport, &lookup_daddr,
+ &lookup_dport, &lookup_protocol);
if (err != 0)
{
b->error = node->errors[err];
- next = NAT_NEXT_DROP;
- goto out;
+ return NAT_NEXT_DROP;
}
- if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
+ if (vnet_buffer (b)->sw_if_index[VLIB_TX] != ~0)
{
- if (vnet_buffer (b)->sw_if_index[VLIB_TX] != ~0)
+ if (PREDICT_FALSE (nat44_ed_not_translate_output_feature (
+ sm, ip, lookup_sport, lookup_dport, thread_index, sw_if_index,
+ vnet_buffer (b)->sw_if_index[VLIB_TX], now)))
{
- 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;
- }
+ return next;
}
- else
+ }
+ else
+ {
+ if (PREDICT_FALSE (nat44_ed_not_translate (sm, node, sw_if_index, ip,
+ NAT_PROTOCOL_ICMP,
+ rx_fib_index, thread_index)))
{
- if (PREDICT_FALSE (nat44_ed_not_translate (sm, node, sw_if_index,
- ip, SNAT_PROTOCOL_ICMP,
- rx_fib_index,
- thread_index)))
- {
- dont_translate = 1;
- goto out;
- }
+ return next;
}
+ }
- 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_NEXT_DROP;
- goto out;
- }
+ 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];
+ return NAT_NEXT_DROP;
+ }
- 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 (vm));
+ next = slow_path_ed (sm, b, ip->src_address, ip->dst_address, lookup_sport,
+ lookup_dport, ip->protocol, rx_fib_index, &s, node,
+ next, thread_index, vlib_time_now (vm));
- if (PREDICT_FALSE (next == NAT_NEXT_DROP))
- goto out;
+ if (NAT_NEXT_DROP == next)
+ goto out;
- if (!s)
- {
- dont_translate = 1;
- goto out;
- }
- }
- else
+ if (PREDICT_TRUE (!ip4_is_fragment (ip)))
{
- 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)))
+ ip_csum_t sum = ip_incremental_checksum_buffer (
+ vm, b, (u8 *) icmp - (u8 *) vlib_buffer_get_current (b),
+ ntohs (ip->length) - ip4_header_bytes (ip), 0);
+ checksum = ~ip_csum_fold (sum);
+ if (PREDICT_FALSE (checksum != 0 && checksum != 0xffff))
{
- b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
next = NAT_NEXT_DROP;
goto out;
}
-
- s = pool_elt_at_index (tsm->sessions, value.value);
}
+
out:
- if (s)
- *p_value = s->out2in;
- *p_dont_translate = dont_translate;
- if (d)
- *(snat_session_t **) d = s;
+ if (PREDICT_TRUE (next != NAT_NEXT_DROP && s))
+ {
+ /* Accounting */
+ nat44_session_update_counters (
+ s, now, vlib_buffer_length_in_chain (vm, b), thread_index);
+ /* Per-user LRU list maintenance */
+ nat44_session_update_lru (sm, s, thread_index);
+ }
+ *s_p = s;
return next;
}
-#endif
static snat_session_t *
-nat44_ed_in2out_unknown_proto (snat_main_t * sm,
- vlib_buffer_t * b,
- ip4_header_t * ip,
- u32 rx_fib_index,
- u32 thread_index,
- f64 now,
- vlib_main_t * vm, vlib_node_runtime_t * node)
+nat44_ed_in2out_slowpath_unknown_proto (snat_main_t *sm, vlib_buffer_t *b,
+ ip4_header_t *ip, u32 rx_fib_index,
+ u32 thread_index, f64 now,
+ vlib_main_t *vm,
+ vlib_node_runtime_t *node)
{
clib_bihash_kv_8_8_t kv, value;
clib_bihash_kv_16_8_t s_kv, s_value;
- snat_static_mapping_t *m;
- u32 old_addr, new_addr = 0;
- ip_csum_t sum;
+ snat_static_mapping_t *m = NULL;
snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
- snat_session_t *s;
+ snat_session_t *s = NULL;
u32 outside_fib_index = sm->outside_fib_index;
int i;
- u8 is_sm = 0;
- nat_outside_fib_t *outside_fib;
- fib_node_index_t fei = FIB_NODE_INDEX_INVALID;
- fib_prefix_t pfx = {
- .fp_proto = FIB_PROTOCOL_IP4,
- .fp_len = 32,
- .fp_addr = {
- .ip4.as_u32 = ip->dst_address.as_u32,
- },
- };
+ ip4_address_t new_src_addr = { 0 };
+ ip4_address_t new_dst_addr = ip->dst_address;
+
+ 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_per_thread);
+ nat_elog_notice ("maximum sessions exceeded");
+ return 0;
+ }
switch (vec_len (sm->outside_fibs))
{
outside_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)
- {
- outside_fib_index = outside_fib->fib_index;
- break;
- }
- }
- }
- /* *INDENT-ON* */
+ outside_fib_index = nat_outside_fib_index_lookup (sm, ip->dst_address);
break;
}
- old_addr = ip->src_address.as_u32;
- make_ed_kv (&ip->src_address, &ip->dst_address, ip->protocol,
- rx_fib_index, 0, 0, ~0ULL, &s_kv);
+ init_nat_k (&kv, ip->src_address, 0, rx_fib_index, 0);
- if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &s_kv, &s_value))
+ /* Try to find static mapping first */
+ if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value))
{
- s = pool_elt_at_index (tsm->sessions, s_value.value);
- new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32;
+ m = pool_elt_at_index (sm->static_mappings, value.value);
+ new_src_addr = m->external_addr;
}
else
{
- if (PREDICT_FALSE
- (nat44_ed_maximum_sessions_exceeded
- (sm, rx_fib_index, thread_index)))
+ pool_foreach (s, tsm->sessions)
{
- 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 0;
+ if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32)
+ {
+ init_ed_k (&s_kv, s->out2in.addr, 0, ip->dst_address, 0,
+ outside_fib_index, ip->protocol);
+ if (clib_bihash_search_16_8 (&sm->flow_hash, &s_kv, &s_value))
+ {
+ new_src_addr = s->out2in.addr;
+ }
+ break;
+ }
}
- make_sm_kv (&kv, &ip->src_address, 0, rx_fib_index, 0);
-
- /* Try to find static mapping first */
- if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value))
+ if (!new_src_addr.as_u32)
{
- m = pool_elt_at_index (sm->static_mappings, value.value);
- new_addr = ip->src_address.as_u32 = m->external_addr.as_u32;
- is_sm = 1;
- goto create_ses;
- }
- else
- {
- /* *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 (&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))
+ init_ed_k (&s_kv, sm->addresses[i].addr, 0, ip->dst_address, 0,
+ outside_fib_index, ip->protocol);
+ if (clib_bihash_search_16_8 (&sm->flow_hash, &s_kv, &s_value))
{
- new_addr = ip->src_address.as_u32 =
- sm->addresses[i].addr.as_u32;
- goto create_ses;
+ new_src_addr = sm->addresses[i].addr;
}
}
- return 0;
}
+ }
- create_ses:
- s = nat_ed_session_alloc (sm, thread_index, now);
- if (!s)
- {
- b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED];
- nat_elog_warn ("create NAT session failed");
- return 0;
- }
+ if (!new_src_addr.as_u32)
+ {
+ // could not allocate address for translation ...
+ return 0;
+ }
- s->ext_host_addr.as_u32 = ip->dst_address.as_u32;
- s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO;
- s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
- s->out2in.addr.as_u32 = new_addr;
- s->out2in.fib_index = outside_fib_index;
- s->in2out.addr.as_u32 = old_addr;
- s->in2out.fib_index = rx_fib_index;
- s->in2out.port = s->out2in.port = ip->protocol;
- if (is_sm)
- s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
-
- /* Add to lookup tables */
- 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->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");
+ s = nat_ed_session_alloc (sm, thread_index, now, ip->protocol);
+ if (!s)
+ {
+ b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED];
+ nat_elog_warn ("create NAT session failed");
+ return 0;
}
- /* Update IP checksum */
- sum = ip->checksum;
- sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, src_address);
- ip->checksum = ip_csum_fold (sum);
+ nat_6t_i2o_flow_init (sm, thread_index, s, ip->src_address, 0,
+ ip->dst_address, 0, rx_fib_index, ip->protocol);
+ nat_6t_flow_saddr_rewrite_set (&s->i2o, new_src_addr.as_u32);
+ nat_6t_flow_txfib_rewrite_set (&s->i2o, outside_fib_index);
+
+ // hairpinning?
+ int is_hairpinning =
+ nat44_ed_external_sm_lookup (sm, ip->dst_address, 0, NAT_PROTOCOL_OTHER,
+ outside_fib_index, &new_dst_addr, NULL);
+ s->flags |= is_hairpinning * SNAT_SESSION_FLAG_HAIRPINNING;
+
+ nat_6t_flow_daddr_rewrite_set (&s->i2o, new_dst_addr.as_u32);
+ nat_6t_flow_txfib_rewrite_set (&s->i2o, outside_fib_index);
+
+ nat_6t_o2i_flow_init (sm, thread_index, s, new_dst_addr, 0, new_src_addr, 0,
+ outside_fib_index, ip->protocol);
+ nat_6t_flow_saddr_rewrite_set (&s->o2i, ip->dst_address.as_u32);
+ nat_6t_flow_daddr_rewrite_set (&s->o2i, ip->src_address.as_u32);
+ nat_6t_flow_txfib_rewrite_set (&s->o2i, rx_fib_index);
+
+ s->ext_host_addr.as_u32 = ip->dst_address.as_u32;
+ s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO;
+ s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT;
+ s->out2in.addr.as_u32 = new_src_addr.as_u32;
+ s->out2in.fib_index = outside_fib_index;
+ s->in2out.addr.as_u32 = ip->src_address.as_u32;
+ s->in2out.fib_index = rx_fib_index;
+ s->in2out.port = s->out2in.port = ip->protocol;
+ if (m)
+ s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
+
+ if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 1))
+ {
+ nat_elog_notice ("in2out flow hash add failed");
+ nat_ed_session_delete (sm, s, thread_index, 1);
+ return NULL;
+ }
+
+ if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 1))
+ {
+ nat_elog_notice ("out2in flow hash add failed");
+ nat_ed_session_delete (sm, s, thread_index, 1);
+ return NULL;
+ }
+
+ per_vrf_sessions_register_session (s, thread_index);
/* Accounting */
nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b),
/* Per-user LRU list maintenance */
nat44_session_update_lru (sm, s, thread_index);
- /* Hairpinning */
- if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
- nat44_ed_hairpinning_unknown_proto (sm, b, ip);
-
- if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
- vnet_buffer (b)->sw_if_index[VLIB_TX] = outside_fib_index;
-
return s;
}
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;
+ u32 n_left_from, *from;
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, def_slow;
-
- 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;
+ u32 def_slow = is_output_feature ? NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH
+ : NAT_NEXT_IN2OUT_ED_SLOW_PATH;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
+
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+ u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
+ vlib_get_buffers (vm, from, b, n_left_from);
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)
+ vlib_buffer_t *b0;
+ u32 sw_if_index0, rx_fib_index0, iph_offset0 = 0;
+ nat_protocol_t proto0;
+ ip4_header_t *ip0;
+ snat_session_t *s0 = 0;
+ clib_bihash_kv_16_8_t kv0, value0;
+ nat_translation_error_e translation_error = NAT_ED_TRNSL_ERR_SUCCESS;
+ nat_6t_flow_t *f = 0;
+ ip4_address_t lookup_saddr, lookup_daddr;
+ u16 lookup_sport, lookup_dport;
+ u8 lookup_protocol;
+ int lookup_skipped = 0;
+
+ b0 = *b;
+ b++;
+
+ /* Prefetch next iteration. */
+ if (PREDICT_TRUE (n_left_from >= 2))
{
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0,
- new_addr0, old_addr0;
- 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;
-
- /* 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);
+ vlib_buffer_t *p2;
- if (is_output_feature)
- {
- vnet_feature_next (&vnet_buffer2 (b0)->nat.arc_next, b0);
- iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
- }
+ p2 = *b;
- next0 = vnet_buffer2 (b0)->nat.arc_next;
+ vlib_prefetch_buffer_header (p2, LOAD);
- ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
- iph_offset0);
+ CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD);
+ }
- 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 (is_output_feature)
+ {
+ iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
+ }
- if (PREDICT_FALSE (ip0->ttl == 1))
- {
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- next0 = NAT_NEXT_ICMP_ERROR;
- goto trace0;
- }
+ next[0] = vnet_buffer2 (b0)->nat.arc_next;
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
- proto0 = ip_proto_to_snat_proto (ip0->protocol);
+ ip0 =
+ (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + iph_offset0);
- if (PREDICT_FALSE (proto0 == ~0))
- {
- next0 = def_slow;
- goto trace0;
- }
+ 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 (is_output_feature)
- {
- if (PREDICT_FALSE (nat_not_translate_output_feature_fwd
- (sm, ip0, thread_index, now, vm, b0)))
- goto trace0;
- }
+ if (PREDICT_FALSE (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next[0] = NAT_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
- {
- next0 = def_slow;
- goto trace0;
- }
+ proto0 = ip_proto_to_nat_proto (ip0->protocol);
- 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;
+ }
- // lookup for session
- if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
+ {
+ if (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_request &&
+ vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags !=
+ ICMP4_echo_reply &&
+ !icmp_type_is_error_message (
+ vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags))
{
- // session does not exist go slow path
- next0 = def_slow;
+ b0->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
+ next[0] = NAT_NEXT_DROP;
goto trace0;
}
- s0 = pool_elt_at_index (tsm->sessions, value0.value);
-
- if (s0->tcp_close_timestamp)
+ int err = nat_get_icmp_session_lookup_values (
+ b0, ip0, &lookup_saddr, &lookup_sport, &lookup_daddr,
+ &lookup_dport, &lookup_protocol);
+ if (err != 0)
{
- if (now >= s0->tcp_close_timestamp)
- {
- // session is closed, go slow path
- next0 = def_slow;
- }
- else
- {
- // session in transitory timeout, drop
- b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TCP_CLOSED];
- next0 = NAT_NEXT_DROP;
- }
+ b0->error = node->errors[err];
+ next[0] = NAT_NEXT_DROP;
goto trace0;
}
+ }
+ else
+ {
+ lookup_protocol = ip0->protocol;
+ lookup_saddr = ip0->src_address;
+ lookup_daddr = ip0->dst_address;
+ lookup_sport = vnet_buffer (b0)->ip.reass.l4_src_port;
+ lookup_dport = vnet_buffer (b0)->ip.reass.l4_dst_port;
+ }
- // 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)
+ /* there might be a stashed index in vnet_buffer2 from handoff or
+ * classify node, see if it can be used */
+ if (!pool_is_free_index (tsm->sessions,
+ vnet_buffer2 (b0)->nat.cached_session_index))
+ {
+ s0 = pool_elt_at_index (tsm->sessions,
+ vnet_buffer2 (b0)->nat.cached_session_index);
+ if (PREDICT_TRUE (
+ nat_6t_flow_match (&s0->i2o, b0, lookup_saddr, lookup_sport,
+ lookup_daddr, lookup_dport, lookup_protocol,
+ rx_fib_index0)
+ // for some hairpinning cases there are two "i2i" flows instead
+ // of i2o and o2i as both hosts are on inside
+ || (s0->flags & SNAT_SESSION_FLAG_HAIRPINNING &&
+ nat_6t_flow_match (
+ &s0->o2i, b0, lookup_saddr, lookup_sport, lookup_daddr,
+ lookup_dport, lookup_protocol, rx_fib_index0))))
{
- 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;
+ /* yes, this is the droid we're looking for */
+ lookup_skipped = 1;
+ goto skip_lookup;
}
+ s0 = NULL;
+ }
- b0->flags |= VNET_BUFFER_F_IS_NATED;
+ init_ed_k (&kv0, ip0->src_address, lookup_sport, ip0->dst_address,
+ lookup_dport, rx_fib_index0, lookup_protocol);
- if (!is_output_feature)
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
+ // lookup flow
+ if (clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0))
+ {
+ // flow does not exist go slow path
+ next[0] = def_slow;
+ goto trace0;
+ }
- old_addr0 = ip0->src_address.as_u32;
- new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- src_address);
- 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);
+ ASSERT (thread_index == ed_value_get_thread_index (&value0));
+ s0 =
+ pool_elt_at_index (tsm->sessions,
+ ed_value_get_session_index (&value0));
- old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
+ skip_lookup:
- if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
- {
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
- {
- 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);
- }
- tcp_packets++;
- if (nat44_set_tcp_session_state_i2o
- (sm, now, s0, b0, thread_index))
- goto trace0;
- }
- else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
- && udp0->checksum)
+ if (PREDICT_FALSE (per_vrf_sessions_is_expired (s0, thread_index)))
+ {
+ // session is closed, go slow path
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat_ed_session_delete (sm, s0, thread_index, 1);
+ next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH;
+ goto trace0;
+ }
+
+ if (s0->tcp_closed_timestamp)
+ {
+ if (now >= s0->tcp_closed_timestamp)
{
- 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);
- 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);
- udp0->dst_port = s0->ext_host_port;
- ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
- }
- udp0->checksum = ip_csum_fold (sum0);
- udp_packets++;
+ // session is closed, go slow path, freed in slow path
+ next[0] = def_slow;
}
else
{
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
- {
- 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++;
- }
+ // session in transitory timeout, drop
+ b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TCP_CLOSED];
+ next[0] = NAT_NEXT_DROP;
}
+ goto trace0;
+ }
- /* 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);
+ // 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)
+ {
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat_ed_session_delete (sm, s0, thread_index, 1);
+ // session is closed, go slow path
+ next[0] = def_slow;
+ goto trace0;
+ }
+
+ b0->flags |= VNET_BUFFER_F_IS_NATED;
+
+ if (nat_6t_flow_match (&s0->i2o, b0, lookup_saddr, lookup_sport,
+ lookup_daddr, lookup_dport, lookup_protocol,
+ rx_fib_index0))
+ {
+ f = &s0->i2o;
+ }
+ else if (s0->flags & SNAT_SESSION_FLAG_HAIRPINNING &&
+ nat_6t_flow_match (&s0->o2i, b0, lookup_saddr, lookup_sport,
+ lookup_daddr, lookup_dport, lookup_protocol,
+ rx_fib_index0))
+ {
+ f = &s0->o2i;
+ }
+ else
+ {
+ translation_error = NAT_ED_TRNSL_ERR_FLOW_MISMATCH;
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat_ed_session_delete (sm, s0, thread_index, 1);
+ next[0] = NAT_NEXT_DROP;
+ goto trace0;
+ }
+
+ if (NAT_ED_TRNSL_ERR_SUCCESS !=
+ (translation_error = nat_6t_flow_buf_translate (
+ sm, b0, ip0, f, proto0, is_output_feature)))
+ {
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat_ed_session_delete (sm, s0, thread_index, 1);
+ next[0] = NAT_NEXT_DROP;
+ goto trace0;
+ }
+
+ switch (proto0)
+ {
+ case NAT_PROTOCOL_TCP:
+ vlib_increment_simple_counter (&sm->counters.fastpath.in2out_ed.tcp,
+ thread_index, sw_if_index0, 1);
+ nat44_set_tcp_session_state_i2o (sm, now, s0, b0, thread_index);
+ break;
+ case NAT_PROTOCOL_UDP:
+ vlib_increment_simple_counter (&sm->counters.fastpath.in2out_ed.udp,
+ thread_index, sw_if_index0, 1);
+ break;
+ case NAT_PROTOCOL_ICMP:
+ vlib_increment_simple_counter (&sm->counters.fastpath.in2out_ed.icmp,
+ thread_index, sw_if_index0, 1);
+ break;
+ case NAT_PROTOCOL_OTHER:
+ vlib_increment_simple_counter (
+ &sm->counters.fastpath.in2out_ed.other, thread_index, sw_if_index0,
+ 1);
+ break;
+ }
- trace0:
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ /* 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)))
+ {
+ nat_in2out_ed_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next[0];
+ t->is_slow_path = 0;
+ t->translation_error = translation_error;
+ t->lookup_skipped = lookup_skipped;
+ clib_memcpy (&t->search_key, &kv0, sizeof (t->search_key));
+
+ if (s0)
{
- nat_in2out_ed_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->is_slow_path = 0;
-
- if (s0)
- t->session_index = s0 - tsm->sessions;
- else
- t->session_index = ~0;
+ t->session_index = s0 - tsm->sessions;
+ clib_memcpy (&t->i2of, &s0->i2o, sizeof (t->i2of));
+ clib_memcpy (&t->o2if, &s0->o2i, sizeof (t->o2if));
+ t->translation_via_i2of = (&s0->i2o == f);
}
+ else
+ {
+ t->session_index = ~0;
+ }
+ }
- 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);
+ if (next[0] == NAT_NEXT_DROP)
+ {
+ vlib_increment_simple_counter (&sm->counters.fastpath.
+ in2out_ed.drops, thread_index,
+ sw_if_index0, 1);
}
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ n_left_from--;
+ next++;
}
- 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);
+ vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
+ frame->n_vectors);
return frame->n_vectors;
}
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;
+ u32 n_left_from, *from;
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;
-
- stats_node_index = sm->ed_in2out_slowpath_node_index;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
+
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
+ u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
+ vlib_get_buffers (vm, from, b, n_left_from);
while (n_left_from > 0)
{
- u32 n_left_to_next;
+ vlib_buffer_t *b0;
+ u32 sw_if_index0, rx_fib_index0, iph_offset0 = 0;
+ nat_protocol_t proto0;
+ ip4_header_t *ip0;
+ udp_header_t *udp0;
+ icmp46_header_t *icmp0;
+ snat_session_t *s0 = 0;
+ clib_bihash_kv_16_8_t kv0, value0;
+ int translation_error = NAT_ED_TRNSL_ERR_SUCCESS;
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ b0 = *b;
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0,
- new_addr0, old_addr0;
- u16 old_port0, new_port0;
- ip4_header_t *ip0;
- udp_header_t *udp0;
- tcp_header_t *tcp0;
- icmp46_header_t *icmp0;
- snat_session_t *s0 = 0;
- clib_bihash_kv_16_8_t kv0, value0;
- 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);
+ if (is_output_feature)
+ iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
- if (is_output_feature)
- iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
+ next[0] = vnet_buffer2 (b0)->nat.arc_next;
+
+ ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
+ iph_offset0);
- next0 = vnet_buffer2 (b0)->nat.arc_next;
+ 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 (ip0->ttl == 1))
+ {
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
+ ICMP4_time_exceeded_ttl_exceeded_in_transit,
+ 0);
+ next[0] = NAT_NEXT_ICMP_ERROR;
+ goto trace0;
+ }
- ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) +
- iph_offset0);
+ udp0 = ip4_next_header (ip0);
+ icmp0 = (icmp46_header_t *) udp0;
+ proto0 = ip_proto_to_nat_proto (ip0->protocol);
- 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 (proto0 == NAT_PROTOCOL_OTHER))
+ {
+ s0 = nat44_ed_in2out_slowpath_unknown_proto (
+ sm, b0, ip0, rx_fib_index0, thread_index, now, vm, node);
+ if (!s0)
+ next[0] = NAT_NEXT_DROP;
- if (PREDICT_FALSE (ip0->ttl == 1))
+ if (NAT_ED_TRNSL_ERR_SUCCESS !=
+ (translation_error = nat_6t_flow_buf_translate (
+ sm, b0, ip0, &s0->i2o, proto0, is_output_feature)))
{
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded,
- ICMP4_time_exceeded_ttl_exceeded_in_transit,
- 0);
- 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);
+ vlib_increment_simple_counter (&sm->counters.slowpath.
+ in2out_ed.other, thread_index,
+ sw_if_index0, 1);
+ goto trace0;
+ }
- if (PREDICT_FALSE (proto0 == ~0))
+ if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
+ {
+ next[0] = icmp_in2out_ed_slow_path (sm, b0, ip0, icmp0, sw_if_index0,
+ rx_fib_index0, node, next[0],
+ now, thread_index, proto0, &s0);
+ if (NAT_NEXT_DROP != next[0] && s0 &&
+ NAT_ED_TRNSL_ERR_SUCCESS !=
+ (translation_error = nat_6t_flow_buf_translate (
+ sm, b0, ip0, &s0->i2o, proto0, is_output_feature)))
{
- 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;
}
- if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP))
+ vlib_increment_simple_counter (&sm->counters.slowpath.
+ in2out_ed.icmp, thread_index,
+ sw_if_index0, 1);
+ goto trace0;
+ }
+
+ init_ed_k (&kv0, ip0->src_address,
+ vnet_buffer (b0)->ip.reass.l4_src_port, ip0->dst_address,
+ vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0,
+ ip0->protocol);
+ if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0))
+ {
+ ASSERT (thread_index == ed_value_get_thread_index (&value0));
+ s0 =
+ pool_elt_at_index (tsm->sessions,
+ ed_value_get_session_index (&value0));
+
+ if (s0->tcp_closed_timestamp && now >= s0->tcp_closed_timestamp)
{
- 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;
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat_ed_session_delete (sm, s0, thread_index, 1);
+ s0 = NULL;
}
+ }
- // 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 (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
+ if (!s0)
+ {
+ if (is_output_feature)
{
- s0 = pool_elt_at_index (tsm->sessions, value0.value);
+ 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],
+ now)))
+ goto trace0;
- if (s0->tcp_close_timestamp && now >= s0->tcp_close_timestamp)
- {
- nat_free_session_data (sm, s0, thread_index, 0);
- nat44_ed_delete_session (sm, s0, thread_index, 1);
- s0 = NULL;
- }
+ /*
+ * 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 == NAT_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;
}
-
- if (!s0)
+ else
{
- if (is_output_feature)
- {
- 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;
-
- /*
- * 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
- {
- if (PREDICT_FALSE
- (nat44_ed_not_translate
- (sm, node, sw_if_index0, ip0, proto0, rx_fib_index0,
- thread_index)))
- goto trace0;
- }
+ 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, 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);
+ next[0] =
+ 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, next[0],
+ thread_index, now);
- if (PREDICT_FALSE (next0 == NAT_NEXT_DROP))
- goto trace0;
+ if (PREDICT_FALSE (next[0] == NAT_NEXT_DROP))
+ goto trace0;
- if (PREDICT_FALSE (!s0))
- goto trace0;
+ if (PREDICT_FALSE (!s0))
+ goto trace0;
- }
+ }
- b0->flags |= VNET_BUFFER_F_IS_NATED;
+ b0->flags |= VNET_BUFFER_F_IS_NATED;
- if (!is_output_feature)
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
+ if (NAT_ED_TRNSL_ERR_SUCCESS !=
+ (translation_error = nat_6t_flow_buf_translate (
+ sm, b0, ip0, &s0->i2o, proto0, is_output_feature)))
+ {
+ nat_free_session_data (sm, s0, thread_index, 0);
+ nat_ed_session_delete (sm, s0, thread_index, 1);
+ s0 = NULL;
+ goto trace0;
+ }
- old_addr0 = ip0->src_address.as_u32;
- new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t,
- src_address);
- 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_TRUE (proto0 == NAT_PROTOCOL_TCP))
+ {
+ vlib_increment_simple_counter (&sm->counters.slowpath.in2out_ed.tcp,
+ thread_index, sw_if_index0, 1);
+ nat44_set_tcp_session_state_i2o (sm, now, s0, b0, thread_index);
+ }
+ else
+ {
+ vlib_increment_simple_counter (&sm->counters.slowpath.in2out_ed.udp,
+ thread_index, sw_if_index0, 1);
+ }
- old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
+ /* 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);
- if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP))
- {
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
- {
- 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);
- }
- tcp_packets++;
- if (nat44_set_tcp_session_state_i2o
- (sm, now, s0, b0, thread_index))
- goto trace0;
- }
- 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);
- 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);
- udp0->dst_port = s0->ext_host_port;
- ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
- }
- udp0->checksum = ip_csum_fold (sum0);
- udp_packets++;
- }
- else
+ 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->sw_if_index = sw_if_index0;
+ t->next_index = next[0];
+ t->is_slow_path = 1;
+ t->translation_error = translation_error;
+ clib_memcpy (&t->search_key, &kv0, sizeof (t->search_key));
+
+ if (s0)
{
- if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment)
- {
- 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++;
- }
+ t->session_index = s0 - tsm->sessions;
+ clib_memcpy (&t->i2of, &s0->i2o, sizeof (t->i2of));
+ clib_memcpy (&t->o2if, &s0->o2i, sizeof (t->o2if));
+ t->translation_via_i2of = 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)))
+ else
{
- nat_in2out_ed_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->is_slow_path = 1;
-
- if (s0)
- t->session_index = s0 - tsm->sessions;
- else
- t->session_index = ~0;
+ t->session_index = ~0;
}
+ }
- 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);
+ if (next[0] == NAT_NEXT_DROP)
+ {
+ vlib_increment_simple_counter (&sm->counters.slowpath.
+ in2out_ed.drops, thread_index,
+ sw_if_index0, 1);
}
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ n_left_from--;
+ next++;
+ b++;
}
- 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);
+ vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
+ frame->n_vectors);
+
return frame->n_vectors;
}
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);
+ return format (s, "in2out next_index %d arc_next_index %d", t->next_index,
+ t->arc_next_index);
}
VLIB_NODE_FN (nat_pre_in2out_node)
NAT_NEXT_IN2OUT_ED_FAST_PATH);
}
+VLIB_NODE_FN (nat_pre_in2out_output_node)
+ (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return nat_pre_node_fn_inline (vm, node, frame,
+ NAT_NEXT_IN2OUT_ED_OUTPUT_FAST_PATH);
+}
+
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (nat_pre_in2out_node) = {
.name = "nat-pre-in2out",
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = 0,
};
+
+VLIB_REGISTER_NODE (nat_pre_in2out_output_node) = {
+ .name = "nat-pre-in2out-output",
+ .vector_size = sizeof (u32),
+ .sibling_of = "nat-default",
+ .format_trace = format_nat_pre_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = 0,
+};
/* *INDENT-ON* */
/*
Code Review / vpp.git / blobdiff