X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fnat%2Fin2out_ed.c;h=5973d36ba19f68d59c7bd7c37b031d65ef32621c;hb=25fd8ad03;hp=807a716e9426b810bfd484807f5e8d974c41a760;hpb=ba5f9bc7534bcf58225b0658993728b1f4d47a67;p=vpp.git diff --git a/src/plugins/nat/in2out_ed.c b/src/plugins/nat/in2out_ed.c index 807a716e942..5973d36ba19 100644 --- a/src/plugins/nat/in2out_ed.c +++ b/src/plugins/nat/in2out_ed.c @@ -19,18 +19,24 @@ #include #include -#include #include #include #include -#include +#include #include #include -#include +#include #include #include -#include +#include #include +#include +#include + +/* 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, @@ -72,85 +78,79 @@ nat44_i2o_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg) nat44_is_idle_session_ctx_t *ctx = arg; snat_session_t *s; u64 sess_timeout_time; - nat_ed_ses_key_t ed_key; + u8 proto; + u16 r_port, l_port; + ip4_address_t *l_addr, *r_addr; + u32 fib_index; clib_bihash_kv_16_8_t ed_kv; int i; snat_address_t *a; - 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); + 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 (is_fwd_bypass_session (s)) goto delete; - ed_key.l_addr = s->out2in.addr; - ed_key.r_addr = s->ext_host_addr; - ed_key.fib_index = s->out2in.fib_index; + l_addr = &s->out2in.addr; + r_addr = &s->ext_host_addr; + fib_index = s->out2in.fib_index; if (snat_is_unk_proto_session (s)) { - ed_key.proto = s->in2out.port; - ed_key.r_port = 0; - ed_key.l_port = 0; + proto = s->in2out.port; + r_port = 0; + l_port = 0; } else { - ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol); - ed_key.l_port = s->out2in.port; - ed_key.r_port = s->ext_host_port; + proto = nat_proto_to_ip_proto (s->nat_proto); + l_port = s->out2in.port; + r_port = s->ext_host_port; } - ed_kv.key[0] = ed_key.as_u64[0]; - ed_kv.key[1] = ed_key.as_u64[1]; - if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &ed_kv, 0)) + 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"); - ed_bihash_kv_t bihash_key; - clib_memset (&bihash_key, 0, sizeof (bihash_key)); - bihash_key.k.dst_address = s->ext_host_addr.as_u32; - bihash_key.k.dst_port = s->ext_host_port; - bihash_key.k.src_address = s->out2in.addr.as_u32; - bihash_key.k.src_port = s->out2in.port; - bihash_key.k.protocol = s->out2in.protocol; - clib_bihash_add_del_16_8 (&sm->ed_ext_ports, &bihash_key.kv, - 0 /* is_add */ ); - if (snat_is_unk_proto_session (s)) goto delete; - 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_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->in2out.protocol, is_twice_nat_session (s)); + s->nat_proto, 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, + s->ext_host_port, s->nat_proto, 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; + // 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, - &key); + &s->ext_host_nat_addr, + s->ext_host_nat_port, + s->nat_proto); break; } } @@ -160,9 +160,10 @@ nat44_i2o_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg) goto delete; snat_free_outside_address_and_port (sm->addresses, ctx->thread_index, - &s->out2in); + &s->out2in.addr, s->out2in.port, + s->nat_proto); delete: - nat44_delete_session (sm, s, ctx->thread_index); + nat_ed_session_delete (sm, s, ctx->thread_index, 1); return 1; } @@ -177,6 +178,8 @@ icmp_in2out_ed_slow_path (snat_main_t * sm, vlib_buffer_t * b0, 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; @@ -185,76 +188,79 @@ icmp_in2out_ed_slow_path (snat_main_t * sm, vlib_buffer_t * b0, /* Accounting */ nat44_session_update_counters (s0, now, vlib_buffer_length_in_chain - (sm->vlib_main, b0), thread_index); + (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); -} - static int -nat_alloc_addr_and_port_ed (snat_address_t * addresses, u32 fib_index, - u32 thread_index, nat_ed_ses_key_t * key, - snat_session_key_t * key1, u16 port_per_thread, - u32 snat_thread_index) +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) { int i; snat_address_t *a, *ga = 0; - u32 portnum; + snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; const u16 port_thread_offset = (port_per_thread * snat_thread_index) + 1024; - ed_bihash_kv_t bihash_key; - clib_memset (&bihash_key, 0, sizeof (bihash_key)); - bihash_key.k.dst_address = key->r_addr.as_u32; - bihash_key.k.dst_port = key->r_port; - bihash_key.k.protocol = key1->protocol; - for (i = 0; i < vec_len (addresses); i++) + for (i = 0; i < vec_len (sm->addresses); i++) { - a = addresses + i; - switch (key1->protocol) + a = sm->addresses + i; + switch (nat_proto) { -#define _(N, j, n, s) \ - case SNAT_PROTOCOL_##N: \ - if (a->fib_index == fib_index) \ - { \ - bihash_key.k.src_address = a->addr.as_u32; \ - u16 port = snat_random_port (1, port_per_thread); \ - u16 attempts = port_per_thread; \ - while (attempts > 0) \ - { \ - --attempts; \ - portnum = port_thread_offset + port; \ - bihash_key.k.src_port = clib_host_to_net_u16 (portnum); \ - int rv = clib_bihash_add_del_16_8 ( \ - &snat_main.ed_ext_ports, &bihash_key.kv, 2 /* is_add */); \ - if (0 == rv) \ - { \ - ++a->busy_##n##_port_refcounts[portnum]; \ - a->busy_##n##_ports_per_thread[thread_index]++; \ - a->busy_##n##_ports++; \ - key1->addr = a->addr; \ - key1->port = clib_host_to_net_u16 (portnum); \ - return 0; \ - } \ - port = (port + 1) % port_per_thread; \ - } \ - } \ - else if (a->fib_index == ~0) \ - { \ - ga = a; \ - } \ +#define _(N, j, n, unused) \ + case 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; \ + } \ break; - foreach_snat_protocol; + foreach_nat_protocol; default: nat_elog_info ("unknown protocol"); return 1; @@ -264,11 +270,11 @@ nat_alloc_addr_and_port_ed (snat_address_t * addresses, u32 fib_index, if (ga) { /* fake fib_index to reuse macro */ - fib_index = ~0; + rx_fib_index = ~0; a = ga; - switch (key1->protocol) + switch (nat_proto) { - foreach_snat_protocol; + foreach_nat_protocol; default: nat_elog_info ("unknown protocol"); return 1; @@ -278,203 +284,210 @@ nat_alloc_addr_and_port_ed (snat_address_t * addresses, u32 fib_index, #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_always_inline u32 +nat_outside_fib_index_lookup (snat_main_t * sm, ip4_address_t addr) +{ + fib_node_index_t fei = FIB_NODE_INDEX_INVALID; + nat_outside_fib_t *outside_fib; + fib_prefix_t pfx = { + .fp_proto = FIB_PROTOCOL_IP4, + .fp_len = 32, + .fp_addr = {.ip4.as_u32 = addr.as_u32,} + , + }; + // 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 u32 slow_path_ed (snat_main_t * sm, vlib_buffer_t * b, + ip4_address_t l_addr, + ip4_address_t r_addr, + u16 l_port, + u16 r_port, + u8 proto, u32 rx_fib_index, - clib_bihash_kv_16_8_t * kv, snat_session_t ** sessionp, vlib_node_runtime_t * node, u32 next, u32 thread_index, f64 now) { - snat_session_t *s = 0; - snat_user_t *u; - snat_session_key_t key0, key1; - lb_nat_type_t lb = 0, is_sm = 0; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - nat_ed_ses_key_t *key = (nat_ed_ses_key_t *) kv->key; - u32 proto = ip_proto_to_snat_proto (key->proto); - nat_outside_fib_t *outside_fib; - fib_node_index_t fei = FIB_NODE_INDEX_INVALID; - u8 identity_nat; - fib_prefix_t pfx = { - .fp_proto = FIB_PROTOCOL_IP4, - .fp_len = 32, - .fp_addr = { - .ip4.as_u32 = key->r_addr.as_u32, - }, - }; + 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 cleared = 0; + u32 nat_proto = ip_proto_to_nat_proto (proto); + snat_session_t *s = NULL; + lb_nat_type_t lb = 0; - if (PREDICT_FALSE (nat44_maximum_sessions_exceeded (sm, thread_index))) + if (PREDICT_TRUE (nat_proto == NAT_PROTOCOL_TCP)) { if (PREDICT_FALSE - (!(cleared = nat44_users_cleanup (thread_index, now)))) + (!tcp_flags_is_init + (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags))) + { + b->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN]; + return NAT_NEXT_DROP; + } + } + + if (PREDICT_FALSE + (nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, thread_index))) + { + 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 = key->l_addr; - key0.port = key->l_port; - key1.protocol = key0.protocol = proto; - key0.fib_index = rx_fib_index; - key1.fib_index = sm->outside_fib_index; - + 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)) + (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)) { + 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; + + 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; + } + /* Try to create dynamic translation */ - if (nat_alloc_addr_and_port_ed (sm->addresses, rx_fib_index, - thread_index, key, &key1, + 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)) + tsm->snat_thread_index, s, + &outside_addr, + &outside_port, &out2in_ed_kv)) { - if (cleared || !nat44_out_of_ports_cleanup (thread_index, now) || - nat_alloc_addr_and_port_ed (sm->addresses, rx_fib_index, - thread_index, key, &key1, - sm->port_per_thread, - tsm->snat_thread_index)) - { - nat_elog_notice ("addresses exhausted"); - b->error = node->errors[NAT_IN2OUT_ED_ERROR_OUT_OF_PORTS]; - return NAT_NEXT_DROP; - } + nat_elog_notice ("addresses exhausted"); + b->error = node->errors[NAT_IN2OUT_ED_ERROR_OUT_OF_PORTS]; + nat_ed_session_delete (sm, s, thread_index, 1); + return NAT_NEXT_DROP; } + s->out2in.addr = outside_addr; + s->out2in.port = outside_port; } else { if (PREDICT_FALSE (identity_nat)) { - *sessionp = s; + *sessionp = NULL; return next; } - is_sm = 1; - } - - if (PREDICT_TRUE (proto == SNAT_PROTOCOL_TCP)) - { - if (PREDICT_FALSE - (!tcp_flags_is_init - (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags))) + s = nat_ed_session_alloc (sm, thread_index, now, proto); + ASSERT (s); + s->out2in.addr = sm_addr; + s->out2in.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)) { - b->error = node->errors[NAT_IN2OUT_ED_ERROR_NON_SYN]; - if (!is_sm) - snat_free_outside_address_and_port (sm->addresses, - thread_index, &key1); - return NAT_NEXT_DROP; + 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; } - } - u = nat_user_get_or_create (sm, &key->l_addr, rx_fib_index, thread_index); - if (!u) - { - nat_elog_warn ("create NAT user failed"); - if (!is_sm) - snat_free_outside_address_and_port (sm->addresses, - thread_index, &key1); - b->error = node->errors[NAT_IN2OUT_ED_ERROR_CANNOT_CREATE_USER]; - return NAT_NEXT_DROP; - } + s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; - s = nat_ed_session_alloc (sm, u, thread_index, now); - if (!s) - { - nat44_delete_user_with_no_session (sm, u, thread_index); - nat_elog_warn ("create NAT session failed"); - if (!is_sm) - snat_free_outside_address_and_port (sm->addresses, - thread_index, &key1); - b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED]; - return NAT_NEXT_DROP; + 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"); } - user_session_increment (sm, u, is_sm); - if (is_sm) - s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; if (lb) s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING; s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT; - s->ext_host_addr = key->r_addr; - s->ext_host_port = key->r_port; - s->in2out = key0; - s->out2in = key1; - s->out2in.protocol = key0.protocol; + s->ext_host_addr = r_addr; + s->ext_host_port = r_port; - switch (vec_len (sm->outside_fibs)) - { - case 0: - s->out2in.fib_index = sm->outside_fib_index; - break; - case 1: - s->out2in.fib_index = sm->outside_fibs[0].fib_index; - break; - default: - /* *INDENT-OFF* */ - vec_foreach (outside_fib, sm->outside_fibs) - { - fei = fib_table_lookup (outside_fib->fib_index, &pfx); - if (FIB_NODE_INDEX_INVALID != fei) - { - if (fib_entry_get_resolving_interface (fei) != ~0) - { - s->out2in.fib_index = outside_fib->fib_index; - break; - } - } - } - /* *INDENT-ON* */ - break; - } - - /* Add to lookup tables */ - kv->value = s - tsm->sessions; + clib_bihash_kv_16_8_t in2out_ed_kv; + 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, kv, + if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, &in2out_ed_kv, nat44_i2o_ed_is_idle_session_cb, &ctx)) nat_elog_notice ("in2out-ed key add failed"); - make_ed_kv (kv, &key1.addr, &key->r_addr, key->proto, s->out2in.fib_index, - key1.port, key->r_port); - kv->value = s - tsm->sessions; - if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->out2in_ed, kv, - nat44_o2i_ed_is_idle_session_cb, - &ctx)) - nat_elog_notice ("out2in-ed key add failed"); - *sessionp = s; /* log NAT event */ - 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); + s->nat_proto, s->in2out.fib_index, s->flags, thread_index, 0); + + per_vrf_sessions_register_session (s, thread_index); return next; } @@ -485,23 +498,22 @@ nat44_ed_not_translate (snat_main_t * sm, vlib_node_runtime_t * node, 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 (&kv, &ip->dst_address, &ip->src_address, ip->protocol, - sm->outside_fib_index, udp->dst_port, udp->src_port); + 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)) + /* NAT packet aimed at external address if has active sessions */ + if (clib_bihash_search_16_8 (&sm->out2in_ed, &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 @@ -519,7 +531,6 @@ nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip, u32 thread_index, f64 now, vlib_main_t * vm, vlib_buffer_t * b) { - nat_ed_ses_key_t key; clib_bihash_kv_16_8_t kv, value; snat_session_t *s = 0; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; @@ -529,35 +540,32 @@ nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip, if (ip->protocol == IP_PROTOCOL_ICMP) { - key.as_u64[0] = key.as_u64[1] = 0; - if (get_icmp_i2o_ed_key (b, ip, &key)) + if (get_icmp_i2o_ed_key (b, ip, 0, ~0, ~0, 0, 0, 0, &kv)) return 0; - key.fib_index = 0; - kv.key[0] = key.as_u64[0]; - kv.key[1] = key.as_u64[1]; } else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP) { - make_ed_kv (&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); + 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 (&kv, &ip->src_address, &ip->dst_address, ip->protocol, 0, 0, - 0); + 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)) { - 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, @@ -576,7 +584,7 @@ nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip, static_always_inline int nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip, - u8 proto, u16 src_port, u16 dst_port, + u16 src_port, u16 dst_port, u32 thread_index, u32 rx_sw_if_index, u32 tx_sw_if_index) { @@ -588,15 +596,18 @@ nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip, u32 tx_fib_index = ip4_fib_table_get_index_for_sw_if_index (tx_sw_if_index); /* src NAT check */ - make_ed_kv (&kv, &ip->src_address, &ip->dst_address, proto, tx_fib_index, - src_port, dst_port); - 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->out2in_ed, &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 (nat44_is_ses_closed (s)) { nat_free_session_data (sm, s, thread_index, 0); - nat44_delete_session (sm, s, thread_index); + nat_ed_session_delete (sm, s, thread_index, 1); } else s->flags |= SNAT_SESSION_FLAG_OUTPUT_FEATURE; @@ -604,11 +615,14 @@ nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip, } /* dst NAT check */ - make_ed_kv (&kv, &ip->dst_address, &ip->src_address, proto, rx_fib_index, - dst_port, src_port); + 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)) { - 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; @@ -629,35 +643,34 @@ nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip, #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) + 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) { u32 sw_if_index; u32 rx_fib_index; - nat_ed_ses_key_t key; - snat_session_t *s = 0; - u8 dont_translate = 0; clib_bihash_kv_16_8_t kv, value; u32 next = ~0; int err; + 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; sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX]; rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index); - key.as_u64[0] = key.as_u64[1] = 0; - err = get_icmp_i2o_ed_key (b, ip, &key); + err = + get_icmp_i2o_ed_key (b, ip, rx_fib_index, ~0, ~0, proto, &l_port, + &r_port, &kv); if (err != 0) { b->error = node->errors[err]; next = NAT_NEXT_DROP; goto out; } - key.fib_index = rx_fib_index; - - kv.key[0] = key.as_u64[0]; - kv.key[1] = key.as_u64[1]; if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value)) { @@ -665,21 +678,21 @@ icmp_match_in2out_ed (snat_main_t * sm, vlib_node_runtime_t * node, { if (PREDICT_FALSE (nat44_ed_not_translate_output_feature - (sm, ip, key.proto, key.l_port, key.r_port, thread_index, + (sm, ip, l_port, r_port, thread_index, sw_if_index, vnet_buffer (b)->sw_if_index[VLIB_TX]))) { - dont_translate = 1; + *dont_translate = 1; goto out; } } else { if (PREDICT_FALSE (nat44_ed_not_translate (sm, node, sw_if_index, - ip, SNAT_PROTOCOL_ICMP, + ip, NAT_PROTOCOL_ICMP, rx_fib_index, thread_index))) { - dont_translate = 1; + *dont_translate = 1; goto out; } } @@ -693,15 +706,17 @@ icmp_match_in2out_ed (snat_main_t * sm, vlib_node_runtime_t * node, goto out; } - next = slow_path_ed (sm, b, rx_fib_index, &kv, &s, node, next, - thread_index, vlib_time_now (sm->vlib_main)); + 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)); if (PREDICT_FALSE (next == NAT_NEXT_DROP)) goto out; if (!s) { - dont_translate = 1; + *dont_translate = 1; goto out; } } @@ -720,16 +735,22 @@ icmp_match_in2out_ed (snat_main_t * sm, vlib_node_runtime_t * node, goto out; } - 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)); } - - *p_proto = ip_proto_to_snat_proto (key.proto); out: if (s) - *p_value = s->out2in; - *p_dont_translate = dont_translate; + { + *addr = s->out2in.addr; + *port = s->out2in.port; + *fib_index = s->out2in.fib_index; + } if (d) - *(snat_session_t **) d = s; + { + *(snat_session_t **) d = s; + } return next; } #endif @@ -748,23 +769,11 @@ nat44_ed_in2out_unknown_proto (snat_main_t * sm, snat_static_mapping_t *m; u32 old_addr, new_addr = 0; ip_csum_t sum; - snat_user_t *u; - dlist_elt_t *head, *elt; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - u32 elt_index, head_index, ses_index; snat_session_t *s; u32 outside_fib_index = sm->outside_fib_index; int i; 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, - }, - }; switch (vec_len (sm->outside_fibs)) { @@ -775,52 +784,36 @@ nat44_ed_in2out_unknown_proto (snat_main_t * sm, 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 (&s_kv, &ip->src_address, &ip->dst_address, ip->protocol, - rx_fib_index, 0, 0); + init_ed_k (&s_kv, ip->src_address, 0, ip->dst_address, 0, rx_fib_index, + ip->protocol); if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &s_kv, &s_value)) { - s = pool_elt_at_index (tsm->sessions, s_value.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; } else { - if (PREDICT_FALSE (nat44_maximum_sessions_exceeded (sm, thread_index))) + if (PREDICT_FALSE + (nat44_ed_maximum_sessions_exceeded + (sm, rx_fib_index, thread_index))) { b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED]; - nat_ipfix_logging_max_sessions (thread_index, sm->max_translations); + nat_ipfix_logging_max_sessions (thread_index, + sm->max_translations_per_thread); nat_elog_notice ("maximum sessions exceeded"); return 0; } - u = nat_user_get_or_create (sm, &ip->src_address, rx_fib_index, - thread_index); - if (!u) - { - b->error = node->errors[NAT_IN2OUT_ED_ERROR_CANNOT_CREATE_USER]; - nat_elog_warn ("create NAT user failed"); - return 0; - } - - make_sm_kv (&kv, &ip->src_address, 0, rx_fib_index, 0); + 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)) @@ -830,47 +823,28 @@ nat44_ed_in2out_unknown_proto (snat_main_t * sm, is_sm = 1; goto create_ses; } - /* Fallback to 3-tuple key */ else { - /* Choose same out address as for TCP/UDP session to same destination */ - head_index = u->sessions_per_user_list_head_index; - head = pool_elt_at_index (tsm->list_pool, head_index); - elt_index = head->next; - if (PREDICT_FALSE (elt_index == ~0)) - ses_index = ~0; - else - { - elt = pool_elt_at_index (tsm->list_pool, elt_index); - ses_index = elt->value; - } - - while (ses_index != ~0) - { - s = pool_elt_at_index (tsm->sessions, ses_index); - elt_index = elt->next; - elt = pool_elt_at_index (tsm->list_pool, elt_index); - ses_index = elt->value; - - if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32) - { - new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32; + /* *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_kv, &s->out2in.addr, &ip->dst_address, - ip->protocol, outside_fib_index, 0, 0); - if (clib_bihash_search_16_8 - (&tsm->out2in_ed, &s_kv, &s_value)) - goto create_ses; + 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; - } - } + break; + } + }); + /* *INDENT-ON* */ for (i = 0; i < vec_len (sm->addresses); i++) { - make_ed_kv (&s_kv, &sm->addresses[i].addr, &ip->dst_address, - ip->protocol, outside_fib_index, 0, 0); - 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->out2in_ed, &s_kv, &s_value)) { new_addr = ip->src_address.as_u32 = sm->addresses[i].addr.as_u32; @@ -881,11 +855,10 @@ nat44_ed_in2out_unknown_proto (snat_main_t * sm, } create_ses: - s = nat_ed_session_alloc (sm, u, thread_index, now); + s = nat_ed_session_alloc (sm, thread_index, now, ip->protocol); if (!s) { - b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED]; - nat44_delete_user_with_no_session (sm, u, thread_index); + b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED]; nat_elog_warn ("create NAT session failed"); return 0; } @@ -900,20 +873,20 @@ nat44_ed_in2out_unknown_proto (snat_main_t * sm, s->in2out.port = s->out2in.port = ip->protocol; if (is_sm) s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; - user_session_increment (sm, u, is_sm); /* Add to lookup tables */ - make_ed_kv (&s_kv, &s->in2out.addr, &ip->dst_address, ip->protocol, - rx_fib_index, 0, 0); - s_kv.value = s - tsm->sessions; + 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"); - make_ed_kv (&s_kv, &s->out2in.addr, &ip->dst_address, ip->protocol, - outside_fib_index, 0, 0); - s_kv.value = s - tsm->sessions; - if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &s_kv, 1)) + 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); } /* Update IP checksum */ @@ -943,203 +916,178 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm, 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_buffer_t *b0; + u32 sw_if_index0, rx_fib_index0, proto0, new_addr0, old_addr0, + iph_offset0 = 0; + u16 old_port0, new_port0; + ip4_header_t *ip0; + udp_header_t *udp0; + tcp_header_t *tcp0; + snat_session_t *s0 = 0; + clib_bihash_kv_16_8_t kv0, value0; + ip_csum_t sum0; + + b0 = *b; + b++; + + /* Prefetch next iteration. */ + if (PREDICT_TRUE (n_left_from >= 2)) + { + vlib_buffer_t *p2; - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + p2 = *b; - while (n_left_from > 0 && n_left_to_next > 0) + vlib_prefetch_buffer_header (p2, LOAD); + + CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD); + } + + if (is_output_feature) { - 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); + iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length; + } - if (is_output_feature) - { - vnet_feature_next (&nat_buffer_opaque (b0)->arc_next, b0); - iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length; - } + next[0] = vnet_buffer2 (b0)->nat.arc_next; - next0 = nat_buffer_opaque (b0)->arc_next; + ip0 = + (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + iph_offset0); - ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + - iph_offset0); + 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); - 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; + } - 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; - } + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + proto0 = ip_proto_to_nat_proto (ip0->protocol); - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - proto0 = ip_proto_to_snat_proto (ip0->protocol); + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) + { + next[0] = def_slow; + goto trace0; + } - if (PREDICT_FALSE (proto0 == ~0)) - { - next0 = def_slow; - goto trace0; - } + if (is_output_feature) + { + if (PREDICT_FALSE + (nat_not_translate_output_feature_fwd + (sm, ip0, thread_index, now, vm, b0))) + goto trace0; + } - if (is_output_feature) - { - if (PREDICT_FALSE (nat_not_translate_output_feature_fwd - (sm, ip0, thread_index, now, vm, b0))) - goto trace0; - } + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) + { + next[0] = def_slow; + goto trace0; + } - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = def_slow; - 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); - make_ed_kv (&kv0, &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); + // lookup for session + if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0)) + { + // session 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)); - // lookup for session - if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0)) - { - // session does not exist go slow path - next0 = def_slow; - goto trace0; - } - s0 = pool_elt_at_index (tsm->sessions, value0.value); + 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_close_timestamp) + if (s0->tcp_closed_timestamp) + { + if (now >= s0->tcp_closed_timestamp) { - 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; - } - goto trace0; + // session is closed, go slow path, freed in slow path + next[0] = def_slow; } - - // 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) + else { - nat_free_session_data (sm, s0, thread_index, 0); - nat44_delete_session (sm, s0, thread_index); - // session is closed, go slow path - next0 = def_slow; - goto trace0; + // session in transitory timeout, drop + b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TCP_CLOSED]; + next[0] = NAT_NEXT_DROP; } + goto trace0; + } - b0->flags |= VNET_BUFFER_F_IS_NATED; + // 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; + } - if (!is_output_feature) - vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index; + b0->flags |= VNET_BUFFER_F_IS_NATED; - 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 (!is_output_feature) + vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index; - old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port; + 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 == 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) + old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port; + + 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 = udp0->checksum; + sum0 = tcp0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, dst_address); @@ -1148,79 +1096,103 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm, 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, 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; + tcp0->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++; + mss_clamping (sm->mss_clamping, tcp0, &sum0); + tcp0->checksum = ip_csum_fold (sum0); } - else + 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); + 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) { - 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))) { - 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++; + 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); } + } - /* 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); + /* 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 = next0; - t->is_slow_path = 0; - - if (s0) - t->session_index = s0 - tsm->sessions; - else - t->session_index = ~0; - } + 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; + + if (s0) + t->session_index = s0 - tsm->sessions; + else + t->session_index = ~0; + } - pkts_processed += next0 == nat_buffer_opaque (b0)->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; } @@ -1230,302 +1202,283 @@ nat44_ed_in2out_slow_path_node_fn_inline (vlib_main_t * vm, 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, proto0, new_addr0, old_addr0, + iph_offset0 = 0; + 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; - 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; - next0 = nat_buffer_opaque (b0)->arc_next; + ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + + iph_offset0); - ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + - iph_offset0); + 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); - 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; + } - 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; - } + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + icmp0 = (icmp46_header_t *) udp0; + proto0 = ip_proto_to_nat_proto (ip0->protocol); - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; - proto0 = ip_proto_to_snat_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); + if (!s0) + next[0] = NAT_NEXT_DROP; - if (PREDICT_FALSE (proto0 == ~0)) - { - s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0, - rx_fib_index0, - thread_index, now, - vm, node); - if (!s0) - next0 = NAT_NEXT_DROP; - - other_packets++; - goto trace0; - } + vlib_increment_simple_counter (&sm->counters.slowpath. + in2out_ed.other, thread_index, + sw_if_index0, 1); + goto trace0; + } - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) + 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); + 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 (&tsm->in2out_ed, &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 (&kv0, &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); - - 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]))) + goto trace0; - if (s0->tcp_close_timestamp && now >= s0->tcp_close_timestamp) - { - nat_free_session_data (sm, s0, thread_index, 0); - nat44_delete_session (sm, s0, thread_index); - 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, ip0->protocol, - 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, rx_fib_index0, &kv0, &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 (!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_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; + old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port; - 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_TRUE (proto0 == NAT_PROTOCOL_TCP)) + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) { new_port0 = udp0->src_port = s0->out2in.port; - sum0 = udp0->checksum; + sum0 = tcp0->checksum; sum0 = - ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); + 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); + 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, 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; + tcp0->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++; + mss_clamping (sm->mss_clamping, tcp0, &sum0); + tcp0->checksum = ip_csum_fold (sum0); } - else + 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) + { + 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) { - 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))) { - 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++; + 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, - 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 = next0; - t->is_slow_path = 1; - - if (s0) - t->session_index = s0 - tsm->sessions; - else - t->session_index = ~0; - } + /* 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); - pkts_processed += next0 == nat_buffer_opaque (b0)->arc_next; + 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; + + if (s0) + t->session_index = s0 - tsm->sessions; + else + t->session_index = ~0; + } - /* 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; } @@ -1616,7 +1569,8 @@ format_nat_pre_trace (u8 * s, va_list * args) 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) @@ -1626,6 +1580,13 @@ 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", @@ -1635,6 +1596,15 @@ VLIB_REGISTER_NODE (nat_pre_in2out_node) = { .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* */ /*