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-rw-r--r--src/plugins/nat/in2out_ed.c1202
1 files changed, 563 insertions, 639 deletions
diff --git a/src/plugins/nat/in2out_ed.c b/src/plugins/nat/in2out_ed.c
index ed9ad04bdb2..9dc68576fd4 100644
--- a/src/plugins/nat/in2out_ed.c
+++ b/src/plugins/nat/in2out_ed.c
@@ -48,7 +48,13 @@ typedef struct
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 *
@@ -65,144 +71,39 @@ format_nat_in2out_ed_trace (u8 * s, va_list * args)
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_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data,
- ctx->thread_index);
-
- ASSERT (ctx->thread_index == ed_value_get_thread_index (kv));
- s = pool_elt_at_index (tsm->sessions, ed_value_get_session_index (kv));
- 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 = nat_proto_to_ip_proto (s->nat_proto);
- l_port = s->out2in.port;
- r_port = s->ext_host_port;
- }
- init_ed_k (&ed_kv, *l_addr, l_port, *r_addr, r_port, fib_index, proto);
- if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &ed_kv, 0))
- nat_elog_warn ("out2in_ed key del failed");
-
- if (snat_is_unk_proto_session (s))
- goto delete;
-
- nat_ipfix_logging_nat44_ses_delete (ctx->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_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->nat_proto, is_twice_nat_session (s));
-
- if (is_twice_nat_session (s))
- {
- for (i = 0; i < vec_len (sm->twice_nat_addresses); i++)
- {
- // TODO FIXME this is obviously broken - which address should be
- // freed here?!
- 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,
- &s->ext_host_nat_addr,
- s->ext_host_nat_port,
- s->nat_proto);
- break;
- }
- }
+ s = format (s, "\n search key %U", format_ed_session_kvp,
+ &t->search_key);
}
-
- if (snat_is_session_static (s))
- goto delete;
-
- snat_free_outside_address_and_port (sm->addresses, ctx->thread_index,
- &s->out2in.addr, s->out2in.port,
- s->nat_proto);
- delete:
- nat_ed_session_delete (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;
+ return s;
}
static int
-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,
- 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;
- 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;
@@ -211,48 +112,50 @@ nat_ed_alloc_addr_and_port (snat_main_t * sm, u32 rx_fib_index,
a = sm->addresses + i;
switch (nat_proto)
{
-#define _(N, j, n, unused) \
- case NAT_PROTOCOL_##N: \
- if (a->fib_index == rx_fib_index) \
- { \
- /* 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 \
- { \
- init_ed_kv (out2in_ed_kv, a->addr, clib_host_to_net_u16 (port), \
- r_addr, r_port, s->out2in.fib_index, proto, \
- thread_index, s - tsm->sessions); \
- int rv = clib_bihash_add_del_16_8 (&sm->out2in_ed, out2in_ed_kv, \
- 2 /* is_add */); \
- if (0 == rv) \
- { \
- ++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; \
- } \
+#define _(N, j, n, unused) \
+ case NAT_PROTOCOL_##N: \
+ if (a->fib_index == rx_fib_index) \
+ { \
+ 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; \
+ } \
break;
foreach_nat_protocol;
@@ -311,28 +214,51 @@ nat_outside_fib_index_lookup (snat_main_t * sm, ip4_address_t addr)
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;
+}
+
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)
+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];
- clib_bihash_kv_16_8_t out2in_ed_kv;
- nat44_is_idle_session_ctx_t ctx;
ip4_address_t outside_addr;
u16 outside_port;
- u8 identity_nat;
+ 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))
{
@@ -358,43 +284,81 @@ slow_path_ed (snat_main_t * sm,
}
}
+ 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, l_addr, l_port, rx_fib_index, nat_proto, &sm_addr, &sm_port,
- &sm_fib_index, 0, 0, 0, &lb, 0, &identity_nat, 0))
+ 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))
+ {
+ *sessionp = NULL;
+ return next;
+ }
+
+ s = nat_ed_session_alloc (sm, thread_index, now, proto);
+ ASSERT (s);
+
+ if (!is_sm)
{
- s = nat_ed_session_alloc (sm, thread_index, now, proto);
- ASSERT (s);
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 = sm->outside_fib_index;
+ s->out2in.fib_index = outside_fib_index;
+
+ // suggest using local port to allocation function
+ outside_port = l_port;
- switch (vec_len (sm->outside_fibs))
+ // 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)
{
- 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:
- s->out2in.fib_index = nat_outside_fib_index_lookup (sm, r_addr);
- break;
+ nat_6t_flow_icmp_id_rewrite_set (&s->o2i, l_port);
}
+ else
+ {
+ 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 */
- outside_port = l_port; // suggest using local port to allocation function
- if (nat_ed_alloc_addr_and_port (sm, rx_fib_index, nat_proto,
- thread_index, r_addr, r_port, proto,
- sm->port_per_thread,
- tsm->snat_thread_index, s,
- &outside_addr,
- &outside_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];
@@ -406,42 +370,40 @@ slow_path_ed (snat_main_t * sm,
}
else
{
- if (PREDICT_FALSE (identity_nat))
- {
- *sessionp = NULL;
- return next;
- }
- s = nat_ed_session_alloc (sm, thread_index, now, proto);
- ASSERT (s);
- s->out2in.addr = sm_addr;
- s->out2in.port = sm_port;
+ // 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 = sm->outside_fib_index;
- 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:
- s->out2in.fib_index = nat_outside_fib_index_lookup (sm, r_addr);
- break;
- }
-
+ s->out2in.fib_index = outside_fib_index;
s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING;
- init_ed_kv (&out2in_ed_kv, sm_addr, sm_port, r_addr, r_port,
- s->out2in.fib_index, proto, thread_index,
- s - tsm->sessions);
- if (clib_bihash_add_or_overwrite_stale_16_8
- (&sm->out2in_ed, &out2in_ed_kv, nat44_o2i_ed_is_idle_session_cb,
- &ctx))
- nat_elog_notice ("out2in-ed key add failed");
+ // 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)
+ {
+ 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);
+ }
+ else
+ {
+ 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);
+ }
+ 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))
+ {
+ nat_elog_notice ("out2in key add failed");
+ goto error;
+ }
}
if (lb)
@@ -450,17 +412,26 @@ slow_path_ed (snat_main_t * sm,
s->ext_host_addr = r_addr;
s->ext_host_port = r_port;
- clib_bihash_kv_16_8_t in2out_ed_kv;
- init_ed_kv (&in2out_ed_kv, l_addr, l_port, r_addr, r_port, rx_fib_index,
- proto, thread_index, s - tsm->sessions);
- 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");
+ 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);
- *sessionp = s;
+ 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 */
nat_ipfix_logging_nat44_ses_create (thread_index,
@@ -479,7 +450,21 @@ slow_path_ed (snat_main_t * sm,
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
@@ -494,7 +479,7 @@ nat44_ed_not_translate (snat_main_t * sm, vlib_node_runtime_t * node,
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 (&sm->out2in_ed, &kv, &value))
+ if (clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value))
{
/* or is static mappings */
ip4_address_t placeholder_addr;
@@ -530,8 +515,15 @@ nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip,
if (ip->protocol == IP_PROTOCOL_ICMP)
{
- if (get_icmp_i2o_ed_key (b, ip, 0, ~0, ~0, 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)
{
@@ -545,12 +537,13 @@ nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip,
ip->protocol);
}
- if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value))
+ if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &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)
@@ -588,7 +581,7 @@ nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip,
/* src NAT check */
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->out2in_ed, &kv, &value))
+ if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value))
{
ASSERT (thread_index == ed_value_get_thread_index (&value));
s =
@@ -606,12 +599,13 @@ nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip,
/* dst NAT check */
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 (&tsm->in2out_ed, &kv, &value))
+ if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &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;
@@ -629,141 +623,115 @@ nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip,
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, ip4_address_t * addr,
- u16 * port, u32 * fib_index, nat_protocol_t * proto,
- void *d, void *e, u8 * dont_translate)
+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;
- clib_bihash_kv_16_8_t kv, value;
- u32 next = ~0;
+ vlib_main_t *vm = vlib_get_main ();
+ u16 checksum;
int err;
snat_session_t *s = NULL;
- 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];
- *dont_translate = 0;
- f64 now = vlib_time_now (vm);
-
- 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);
+ 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, ~0, ~0, 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], now)))
- {
- *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, NAT_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;
}
-
- ASSERT (thread_index == ed_value_get_thread_index (&value));
- s =
- pool_elt_at_index (tsm->sessions,
- ed_value_get_session_index (&value));
}
+
out:
- if (s)
+ if (PREDICT_TRUE (next != NAT_NEXT_DROP && s))
{
- *addr = s->out2in.addr;
- *port = s->out2in.port;
- *fib_index = s->out2in.fib_index;
- }
- if (d)
- {
- *(snat_session_t **) d = 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;
+ 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))
{
@@ -777,112 +745,105 @@ nat44_ed_in2out_unknown_proto (snat_main_t * sm,
outside_fib_index = nat_outside_fib_index_lookup (sm, ip->dst_address);
break;
}
- old_addr = ip->src_address.as_u32;
- init_ed_k (&s_kv, ip->src_address, 0, ip->dst_address, 0, rx_fib_index,
- ip->protocol);
+ 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))
{
- ASSERT (thread_index == ed_value_get_thread_index (&s_value));
- s =
- pool_elt_at_index (tsm->sessions,
- ed_value_get_session_index (&s_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_per_thread);
- 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;
+ }
}
- init_nat_k (&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))
- {
- 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
+ if (!new_src_addr.as_u32)
{
- /* *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;
-
- 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->out2in_ed, &s_kv, &s_value))
- goto create_ses;
-
- break;
- }
- }
- /* *INDENT-ON* */
-
for (i = 0; i < vec_len (sm->addresses); i++)
{
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->out2in_ed, &s_kv, &s_value))
+ 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, ip->protocol);
- if (!s)
- {
- b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_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 */
- init_ed_kv (&s_kv, s->in2out.addr, 0, ip->dst_address, 0, rx_fib_index,
- ip->protocol, thread_index, s - tsm->sessions);
- if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1))
- nat_elog_notice ("in2out key add failed");
-
- init_ed_kv (&s_kv, s->out2in.addr, 0, ip->dst_address, 0,
- outside_fib_index, ip->protocol, thread_index,
- s - tsm->sessions);
- if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &s_kv, 1))
- nat_elog_notice ("out2in key add failed");
-
- per_vrf_sessions_register_session (s, thread_index);
+ 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),
@@ -890,13 +851,6 @@ nat44_ed_in2out_unknown_proto (snat_main_t * sm,
/* 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;
}
@@ -924,15 +878,17 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm,
while (n_left_from > 0)
{
vlib_buffer_t *b0;
- u32 sw_if_index0, rx_fib_index0, proto0, new_addr0, old_addr0,
- iph_offset0 = 0;
- u16 old_port0, new_port0;
+ u32 sw_if_index0, rx_fib_index0, iph_offset0 = 0;
+ nat_protocol_t proto0;
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;
+ 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++;
@@ -973,16 +929,8 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm,
goto trace0;
}
- udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
proto0 = ip_proto_to_nat_proto (ip0->protocol);
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
- {
- next[0] = def_slow;
- goto trace0;
- }
-
if (is_output_feature)
{
if (PREDICT_FALSE
@@ -993,27 +941,79 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm,
if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
{
- next[0] = def_slow;
- goto trace0;
+ 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))
+ {
+ b0->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE];
+ next[0] = NAT_NEXT_DROP;
+ goto trace0;
+ }
+ int err = nat_get_icmp_session_lookup_values (
+ b0, ip0, &lookup_saddr, &lookup_sport, &lookup_daddr,
+ &lookup_dport, &lookup_protocol);
+ if (err != 0)
+ {
+ 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;
}
- 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);
+ /* 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))))
+ {
+ /* yes, this is the droid we're looking for */
+ lookup_skipped = 1;
+ goto skip_lookup;
+ }
+ s0 = NULL;
+ }
+
+ init_ed_k (&kv0, ip0->src_address, lookup_sport, ip0->dst_address,
+ lookup_dport, rx_fib_index0, lookup_protocol);
- // lookup for session
- if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0))
+ // lookup flow
+ if (clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0))
{
- // session does not exist go slow path
+ // flow does not exist go slow path
next[0] = def_slow;
goto trace0;
}
+
ASSERT (thread_index == ed_value_get_thread_index (&value0));
s0 =
pool_elt_at_index (tsm->sessions,
ed_value_get_session_index (&value0));
+ skip_lookup:
+
if (PREDICT_FALSE (per_vrf_sessions_is_expired (s0, thread_index)))
{
// session is closed, go slow path
@@ -1054,96 +1054,58 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm,
b0->flags |= VNET_BUFFER_F_IS_NATED;
- if (!is_output_feature)
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
-
- 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 (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;
+ }
- old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
+ 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;
+ }
- if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
+ switch (proto0)
{
- 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->mss_clamping, tcp0, &sum0);
- tcp0->checksum = ip_csum_fold (sum0);
- }
+ 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);
- }
- 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);
+ break;
+ case NAT_PROTOCOL_UDP:
vlib_increment_simple_counter (&sm->counters.fastpath.in2out_ed.udp,
thread_index, sw_if_index0, 1);
- }
- 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;
- }
- 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;
}
/* Accounting */
@@ -1163,11 +1125,21 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm,
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)
- t->session_index = s0 - tsm->sessions;
+ {
+ 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;
+ {
+ t->session_index = ~0;
+ }
}
if (next[0] == NAT_NEXT_DROP)
@@ -1208,16 +1180,14 @@ nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t * vm,
while (n_left_from > 0)
{
vlib_buffer_t *b0;
- u32 sw_if_index0, rx_fib_index0, proto0, new_addr0, old_addr0,
- iph_offset0 = 0;
- u16 old_port0, new_port0;
+ u32 sw_if_index0, rx_fib_index0, iph_offset0 = 0;
+ nat_protocol_t proto0;
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;
+ int translation_error = NAT_ED_TRNSL_ERR_SUCCESS;
b0 = *b;
@@ -1244,18 +1214,23 @@ nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t * vm,
}
udp0 = ip4_next_header (ip0);
- tcp0 = (tcp_header_t *) udp0;
icmp0 = (icmp46_header_t *) udp0;
proto0 = ip_proto_to_nat_proto (ip0->protocol);
if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
{
- s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0,
- rx_fib_index0,
- thread_index, now, vm, node);
+ 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 (NAT_ED_TRNSL_ERR_SUCCESS !=
+ (translation_error = nat_6t_flow_buf_translate (
+ sm, b0, ip0, &s0->i2o, proto0, is_output_feature)))
+ {
+ goto trace0;
+ }
+
vlib_increment_simple_counter (&sm->counters.slowpath.
in2out_ed.other, thread_index,
sw_if_index0, 1);
@@ -1264,10 +1239,17 @@ nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t * vm,
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, &s0);
+ 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)))
+ {
+ goto trace0;
+ }
+
vlib_increment_simple_counter (&sm->counters.slowpath.
in2out_ed.icmp, thread_index,
sw_if_index0, 1);
@@ -1278,7 +1260,7 @@ nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t * vm,
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 (&tsm->in2out_ed, &kv0, &value0))
+ if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0))
{
ASSERT (thread_index == ed_value_get_thread_index (&value0));
s0 =
@@ -1342,95 +1324,27 @@ nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t * vm,
b0->flags |= VNET_BUFFER_F_IS_NATED;
- if (!is_output_feature)
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index;
-
- 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);
-
- old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port;
+ 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;
+ }
if (PREDICT_TRUE (proto0 == NAT_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->mss_clamping, tcp0, &sum0);
- tcp0->checksum = ip_csum_fold (sum0);
- }
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 if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment
- && udp0->checksum)
+ else
{
- 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);
vlib_increment_simple_counter (&sm->counters.slowpath.in2out_ed.udp,
thread_index, sw_if_index0, 1);
}
- 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;
- }
- vlib_increment_simple_counter (&sm->counters.slowpath.
- in2out_ed.udp, thread_index,
- sw_if_index0, 1);
- }
- }
/* Accounting */
nat44_session_update_counters (s0, now,
@@ -1448,11 +1362,21 @@ nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t * vm,
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)
- t->session_index = s0 - tsm->sessions;
+ {
+ 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;
+ }
+
else
- t->session_index = ~0;
+ {
+ t->session_index = ~0;
+ }
}
if (next[0] == NAT_NEXT_DROP)