X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fnat%2Fout2in_ed.c;h=d6beadc61bc0f6b639de176f151788d2ebbb3d82;hb=4881cb4c6f0d9c6276eb7a45ed355f9fc3d729b3;hp=64f40cf19170cabaa3f2fa89b5c79c2b34e33693;hpb=26c9d4b0cd9c53054d1174bc15aaf8c07e9a8f93;p=vpp.git diff --git a/src/plugins/nat/out2in_ed.c b/src/plugins/nat/out2in_ed.c index 64f40cf1917..d6beadc61bc 100644 --- a/src/plugins/nat/out2in_ed.c +++ b/src/plugins/nat/out2in_ed.c @@ -19,18 +19,17 @@ #include #include -#include #include #include #include -#include +#include #include #include -#include +#include #include #include -#include -#include +#include +#include static char *nat_out2in_ed_error_strings[] = { #define _(sym,string) string, @@ -43,7 +42,13 @@ 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; } nat44_ed_out2in_trace_t; static u8 * @@ -60,169 +65,327 @@ format_nat44_ed_out2in_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); + if (~0 != t->session_index) + { + 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) + { + s = format (s, "\n lookup skipped - cached session index used"); + } + else + { + s = format (s, "\n search key %U", format_ed_session_kvp, + &t->search_key); + } + } return s; } +static int +next_src_nat (snat_main_t *sm, ip4_header_t *ip, u16 src_port, u16 dst_port, + u32 thread_index, u32 rx_fib_index) +{ + clib_bihash_kv_16_8_t kv, value; + + init_ed_k (&kv, ip->src_address, src_port, ip->dst_address, dst_port, + rx_fib_index, ip->protocol); + if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value)) + return 1; + + return 0; +} + +static void create_bypass_for_fwd (snat_main_t *sm, vlib_buffer_t *b, + snat_session_t *s, ip4_header_t *ip, + u32 rx_fib_index, u32 thread_index); + +static snat_session_t *create_session_for_static_mapping_ed ( + snat_main_t *sm, vlib_buffer_t *b, ip4_address_t i2o_addr, u16 i2o_port, + u32 i2o_fib_index, ip4_address_t o2i_addr, u16 o2i_port, u32 o2i_fib_index, + nat_protocol_t nat_proto, vlib_node_runtime_t *node, u32 rx_fib_index, + u32 thread_index, twice_nat_type_t twice_nat, lb_nat_type_t lb_nat, f64 now, + snat_static_mapping_t *mapping); + static inline u32 -icmp_out2in_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) +icmp_out2in_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, + snat_session_t **s_p) { - next0 = icmp_out2in (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)) + vlib_main_t *vm = vlib_get_main (); + + ip_csum_t sum; + u16 checksum; + + snat_session_t *s = 0; + u8 is_addr_only, identity_nat; + ip4_address_t sm_addr; + u16 sm_port; + u32 sm_fib_index; + snat_static_mapping_t *m; + u8 lookup_protocol; + ip4_address_t lookup_saddr, lookup_daddr; + u16 lookup_sport, lookup_dport; + + 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); + + if (nat_get_icmp_session_lookup_values (b, ip, &lookup_saddr, &lookup_sport, + &lookup_daddr, &lookup_dport, + &lookup_protocol)) { - /* Accounting */ - nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain - (sm->vlib_main, b0), thread_index); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s0, thread_index); + b->error = node->errors[NAT_OUT2IN_ED_ERROR_UNSUPPORTED_PROTOCOL]; + next = NAT_NEXT_DROP; + goto out; } - return next0; -} -#ifndef CLIB_MARCH_VARIANT -int -nat44_o2i_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; - nat_ed_ses_key_t ed_key; - clib_bihash_kv_16_8_t ed_kv; - int i; - snat_address_t *a; - snat_session_key_t key; - snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data, - ctx->thread_index); - - s = pool_elt_at_index (tsm->sessions, kv->value); - sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s); - if (ctx->now >= sess_timeout_time) + if (snat_static_mapping_match ( + sm, ip->dst_address, lookup_sport, rx_fib_index, + ip_proto_to_nat_proto (ip->protocol), &sm_addr, &sm_port, + &sm_fib_index, 1, &is_addr_only, 0, 0, 0, &identity_nat, &m)) { - ed_key.l_addr = s->in2out.addr; - ed_key.r_addr = s->ext_host_addr; - ed_key.fib_index = s->in2out.fib_index; - if (snat_is_unk_proto_session (s)) + // static mapping not matched + if (!sm->forwarding_enabled) { - ed_key.proto = s->in2out.port; - ed_key.r_port = 0; - ed_key.l_port = 0; + /* Don't NAT packet aimed at the intfc address */ + if (!is_interface_addr (sm, node, sw_if_index, + ip->dst_address.as_u32)) + { + b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; + next = NAT_NEXT_DROP; + } } else { - ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol); - ed_key.l_port = s->in2out.port; - ed_key.r_port = s->ext_host_port; - } - if (is_twice_nat_session (s)) - { - ed_key.r_addr = s->ext_host_nat_addr; - ed_key.r_port = s->ext_host_nat_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->in2out_ed, &ed_kv, 0)) - nat_elog_warn ("in2out_ed key del failed"); - - if (snat_is_unk_proto_session (s)) - goto delete; - - snat_ipfix_logging_nat44_ses_delete (ctx->thread_index, - s->in2out.addr.as_u32, - s->out2in.addr.as_u32, - s->in2out.protocol, - s->in2out.port, - s->out2in.port, - s->in2out.fib_index); - - nat_syslog_nat44_sdel (s->user_index, s->in2out.fib_index, - &s->in2out.addr, s->in2out.port, - &s->ext_host_nat_addr, s->ext_host_nat_port, - &s->out2in.addr, s->out2in.port, - &s->ext_host_addr, s->ext_host_port, - s->in2out.protocol, is_twice_nat_session (s)); - - nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr, - s->ext_host_port, s->out2in.protocol, s->out2in.fib_index, - ctx->thread_index); - - if (is_twice_nat_session (s)) - { - for (i = 0; i < vec_len (sm->twice_nat_addresses); i++) + if (next_src_nat (sm, ip, lookup_sport, lookup_dport, thread_index, + rx_fib_index)) { - key.protocol = s->in2out.protocol; - key.port = s->ext_host_nat_port; - a = sm->twice_nat_addresses + i; - if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32) - { - snat_free_outside_address_and_port (sm->twice_nat_addresses, - ctx->thread_index, - &key); - break; - } + next = NAT_NEXT_IN2OUT_ED_FAST_PATH; + } + else + { + create_bypass_for_fwd (sm, b, s, ip, rx_fib_index, thread_index); } } + goto out; + } - if (snat_is_session_static (s)) - goto delete; + if (PREDICT_FALSE (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags != + ICMP4_echo_reply && + (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags != + ICMP4_echo_request || + !is_addr_only))) + { + b->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE]; + next = NAT_NEXT_DROP; + goto out; + } - snat_free_outside_address_and_port (sm->addresses, ctx->thread_index, - &s->out2in); - delete: - nat44_delete_session (sm, s, ctx->thread_index); + if (PREDICT_FALSE (identity_nat)) + { + goto out; + } + + /* Create session initiated by host from external network */ + s = create_session_for_static_mapping_ed ( + sm, b, sm_addr, sm_port, sm_fib_index, ip->dst_address, lookup_sport, + rx_fib_index, ip_proto_to_nat_proto (lookup_protocol), node, rx_fib_index, + thread_index, 0, 0, vlib_time_now (vm), m); + if (!s) + next = NAT_NEXT_DROP; + + if (PREDICT_TRUE (!ip4_is_fragment (ip))) + { + 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 (checksum != 0 && checksum != 0xffff) + { + next = NAT_NEXT_DROP; + goto out; + } + } + + if (PREDICT_TRUE (next != NAT_NEXT_DROP && s)) + { + /* Accounting */ + nat44_session_update_counters ( + s, now, vlib_buffer_length_in_chain (vm, b), thread_index); + /* Per-user LRU list maintenance */ + nat44_session_update_lru (sm, s, thread_index); + } +out: + if (NAT_NEXT_DROP == next && s) + { + nat_ed_session_delete (sm, s, thread_index, 1); + s = 0; + } + *s_p = s; + return next; +} + +// allocate exact address based on preference +static_always_inline int +nat_alloc_addr_and_port_exact (snat_address_t * a, + u32 thread_index, + nat_protocol_t proto, + ip4_address_t * addr, + u16 * port, + u16 port_per_thread, u32 snat_thread_index) +{ + u32 portnum; + + switch (proto) + { +#define _(N, j, n, s) \ + case NAT_PROTOCOL_##N: \ + if (a->busy_##n##_ports_per_thread[thread_index] < port_per_thread) \ + { \ + while (1) \ + { \ + portnum = (port_per_thread * \ + snat_thread_index) + \ + snat_random_port(0, port_per_thread - 1) + 1024; \ + if (a->busy_##n##_port_refcounts[portnum]) \ + continue; \ + --a->busy_##n##_port_refcounts[portnum]; \ + a->busy_##n##_ports_per_thread[thread_index]++; \ + a->busy_##n##_ports++; \ + *addr = a->addr; \ + *port = clib_host_to_net_u16(portnum); \ + return 0; \ + } \ + } \ + break; + foreach_nat_protocol +#undef _ + default: + nat_elog_info ("unknown protocol"); return 1; } - return 0; + /* Totally out of translations to use... */ + nat_ipfix_logging_addresses_exhausted (thread_index, 0); + return 1; +} + +static_always_inline int +nat44_ed_alloc_outside_addr_and_port (snat_address_t *addresses, u32 fib_index, + u32 thread_index, nat_protocol_t proto, + ip4_address_t *addr, u16 *port, + u16 port_per_thread, + u32 snat_thread_index) +{ + int i; + snat_address_t *a, *ga = 0; + u32 portnum; + + for (i = 0; i < vec_len (addresses); i++) + { + a = addresses + i; + switch (proto) + { +#define _(N, j, n, s) \ + case NAT_PROTOCOL_##N: \ + if (a->busy_##n##_ports_per_thread[thread_index] < port_per_thread) \ + { \ + if (a->fib_index == fib_index) \ + { \ + while (1) \ + { \ + portnum = (port_per_thread * snat_thread_index) + \ + snat_random_port (0, port_per_thread - 1) + 1024; \ + if (a->busy_##n##_port_refcounts[portnum]) \ + continue; \ + --a->busy_##n##_port_refcounts[portnum]; \ + a->busy_##n##_ports_per_thread[thread_index]++; \ + a->busy_##n##_ports++; \ + *addr = a->addr; \ + *port = clib_host_to_net_u16 (portnum); \ + return 0; \ + } \ + } \ + else if (a->fib_index == ~0) \ + { \ + ga = a; \ + } \ + } \ + break; + foreach_nat_protocol +#undef _ + default : nat_elog_info ("unknown protocol"); + return 1; + } + } + + if (ga) + { + a = ga; + switch (proto) + { +#define _(N, j, n, s) \ + case NAT_PROTOCOL_##N: \ + while (1) \ + { \ + portnum = (port_per_thread * snat_thread_index) + \ + snat_random_port (0, port_per_thread - 1) + 1024; \ + if (a->busy_##n##_port_refcounts[portnum]) \ + continue; \ + ++a->busy_##n##_port_refcounts[portnum]; \ + a->busy_##n##_ports_per_thread[thread_index]++; \ + a->busy_##n##_ports++; \ + *addr = a->addr; \ + *port = clib_host_to_net_u16 (portnum); \ + return 0; \ + } + break; + foreach_nat_protocol +#undef _ + default : nat_elog_info ("unknown protocol"); + return 1; + } + } + + /* Totally out of translations to use... */ + nat_ipfix_logging_addresses_exhausted (thread_index, 0); + return 1; } -#endif static snat_session_t * -create_session_for_static_mapping_ed (snat_main_t * sm, - vlib_buffer_t * b, - snat_session_key_t l_key, - snat_session_key_t e_key, - vlib_node_runtime_t * node, - u32 thread_index, - twice_nat_type_t twice_nat, - lb_nat_type_t lb_nat, f64 now) +create_session_for_static_mapping_ed ( + snat_main_t *sm, vlib_buffer_t *b, ip4_address_t i2o_addr, u16 i2o_port, + u32 i2o_fib_index, ip4_address_t o2i_addr, u16 o2i_port, u32 o2i_fib_index, + nat_protocol_t nat_proto, vlib_node_runtime_t *node, u32 rx_fib_index, + u32 thread_index, twice_nat_type_t twice_nat, lb_nat_type_t lb_nat, f64 now, + snat_static_mapping_t *mapping) { snat_session_t *s; - snat_user_t *u; ip4_header_t *ip; udp_header_t *udp; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - clib_bihash_kv_16_8_t kv; - snat_session_key_t eh_key; - nat44_is_idle_session_ctx_t ctx; - 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_OUT2IN_ED_ERROR_MAX_SESSIONS_EXCEEDED]; nat_elog_notice ("maximum sessions exceeded"); return 0; } - u = nat_user_get_or_create (sm, &l_key.addr, l_key.fib_index, thread_index); - if (!u) - { - b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_SESSIONS_EXCEEDED]; - nat_elog_warn ("create NAT user failed"); - return 0; - } - - s = nat_ed_session_alloc (sm, u, thread_index, now); + s = nat_ed_session_alloc (sm, thread_index, now, nat_proto); if (!s) { b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_USER_SESS_EXCEEDED]; - nat44_delete_user_with_no_session (sm, u, thread_index); nat_elog_warn ("create NAT session failed"); return 0; } @@ -231,192 +394,289 @@ create_session_for_static_mapping_ed (snat_main_t * sm, udp = ip4_next_header (ip); s->ext_host_addr.as_u32 = ip->src_address.as_u32; - s->ext_host_port = e_key.protocol == SNAT_PROTOCOL_ICMP ? 0 : udp->src_port; + s->ext_host_port = nat_proto == NAT_PROTOCOL_ICMP ? 0 : udp->src_port; s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; if (lb_nat) s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING; if (lb_nat == AFFINITY_LB_NAT) s->flags |= SNAT_SESSION_FLAG_AFFINITY; s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT; - s->out2in = e_key; - s->in2out = l_key; - s->in2out.protocol = s->out2in.protocol; - user_session_increment (sm, u, 1); - - /* Add to lookup tables */ - make_ed_kv (&kv, &e_key.addr, &s->ext_host_addr, ip->protocol, - e_key.fib_index, e_key.port, s->ext_host_port); - kv.value = s - tsm->sessions; - ctx.now = now; - ctx.thread_index = thread_index; - 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"); + s->out2in.addr = o2i_addr; + s->out2in.port = o2i_port; + s->out2in.fib_index = o2i_fib_index; + s->in2out.addr = i2o_addr; + s->in2out.port = i2o_port; + s->in2out.fib_index = i2o_fib_index; + s->nat_proto = nat_proto; + + if (NAT_PROTOCOL_ICMP == nat_proto) + { + nat_6t_o2i_flow_init (sm, thread_index, s, s->ext_host_addr, o2i_port, + o2i_addr, o2i_port, o2i_fib_index, ip->protocol); + nat_6t_flow_icmp_id_rewrite_set (&s->o2i, i2o_port); + } + else + { + nat_6t_o2i_flow_init (sm, thread_index, s, s->ext_host_addr, + s->ext_host_port, o2i_addr, o2i_port, + o2i_fib_index, ip->protocol); + nat_6t_flow_dport_rewrite_set (&s->o2i, i2o_port); + } + nat_6t_flow_daddr_rewrite_set (&s->o2i, i2o_addr.as_u32); + nat_6t_flow_txfib_rewrite_set (&s->o2i, i2o_fib_index); + + if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 1)) + { + b->error = node->errors[NAT_OUT2IN_ED_ERROR_HASH_ADD_FAILED]; + nat_ed_session_delete (sm, s, thread_index, 1); + nat_elog_warn ("out2in flow hash add failed"); + return 0; + } if (twice_nat == TWICE_NAT || (twice_nat == TWICE_NAT_SELF && - ip->src_address.as_u32 == l_key.addr.as_u32)) + ip->src_address.as_u32 == i2o_addr.as_u32)) { - eh_key.protocol = e_key.protocol; - if (snat_alloc_outside_address_and_port (sm->twice_nat_addresses, 0, - thread_index, &eh_key, - sm->port_per_thread, - tsm->snat_thread_index)) + int rc = 0; + snat_address_t *filter = 0; + + // if exact address is specified use this address + if (is_exact_address (mapping)) + { + snat_address_t *ap; + vec_foreach (ap, sm->twice_nat_addresses) + { + if (mapping->pool_addr.as_u32 == ap->addr.as_u32) + { + filter = ap; + break; + } + } + } + + if (filter) + { + rc = nat_alloc_addr_and_port_exact (filter, + thread_index, + nat_proto, + &s->ext_host_nat_addr, + &s->ext_host_nat_port, + sm->port_per_thread, + tsm->snat_thread_index); + s->flags |= SNAT_SESSION_FLAG_EXACT_ADDRESS; + } + else + { + rc = nat44_ed_alloc_outside_addr_and_port ( + sm->twice_nat_addresses, 0, thread_index, nat_proto, + &s->ext_host_nat_addr, &s->ext_host_nat_port, sm->port_per_thread, + tsm->snat_thread_index); + } + + if (rc) { b->error = node->errors[NAT_OUT2IN_ED_ERROR_OUT_OF_PORTS]; - nat44_delete_session (sm, s, thread_index); - if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &kv, 0)) - nat_elog_notice ("out2in-ed key del failed"); + if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 0)) + { + nat_elog_warn ("out2in flow hash del failed"); + } + snat_free_outside_address_and_port ( + sm->twice_nat_addresses, thread_index, &s->ext_host_nat_addr, + s->ext_host_nat_port, s->nat_proto); + nat_ed_session_delete (sm, s, thread_index, 1); return 0; } - s->ext_host_nat_addr.as_u32 = eh_key.addr.as_u32; - s->ext_host_nat_port = eh_key.port; + s->flags |= SNAT_SESSION_FLAG_TWICE_NAT; - make_ed_kv (&kv, &l_key.addr, &s->ext_host_nat_addr, ip->protocol, - l_key.fib_index, l_key.port, s->ext_host_nat_port); + + nat_6t_flow_saddr_rewrite_set (&s->o2i, s->ext_host_nat_addr.as_u32); + if (NAT_PROTOCOL_ICMP == nat_proto) + { + nat_6t_flow_icmp_id_rewrite_set (&s->o2i, s->ext_host_nat_port); + } + else + { + nat_6t_flow_sport_rewrite_set (&s->o2i, s->ext_host_nat_port); + } + + nat_6t_l3_l4_csum_calc (&s->o2i); + + nat_6t_i2o_flow_init (sm, thread_index, s, i2o_addr, i2o_port, + s->ext_host_nat_addr, s->ext_host_nat_port, + i2o_fib_index, ip->protocol); + nat_6t_flow_daddr_rewrite_set (&s->i2o, s->ext_host_addr.as_u32); + if (NAT_PROTOCOL_ICMP == nat_proto) + { + nat_6t_flow_icmp_id_rewrite_set (&s->i2o, s->ext_host_port); + } + else + { + nat_6t_flow_dport_rewrite_set (&s->i2o, s->ext_host_port); + } + } + else + { + if (NAT_PROTOCOL_ICMP == nat_proto) + { + nat_6t_i2o_flow_init (sm, thread_index, s, i2o_addr, i2o_port, + s->ext_host_addr, i2o_port, i2o_fib_index, + ip->protocol); + } + else + { + nat_6t_i2o_flow_init (sm, thread_index, s, i2o_addr, i2o_port, + s->ext_host_addr, s->ext_host_port, + i2o_fib_index, ip->protocol); + } + } + + nat_6t_flow_saddr_rewrite_set (&s->i2o, o2i_addr.as_u32); + if (NAT_PROTOCOL_ICMP == nat_proto) + { + nat_6t_flow_icmp_id_rewrite_set (&s->i2o, o2i_port); } else { - make_ed_kv (&kv, &l_key.addr, &s->ext_host_addr, ip->protocol, - l_key.fib_index, l_key.port, s->ext_host_port); + nat_6t_flow_sport_rewrite_set (&s->i2o, o2i_port); } - kv.value = s - tsm->sessions; - if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, &kv, - nat44_i2o_ed_is_idle_session_cb, - &ctx)) - nat_elog_notice ("in2out-ed key add failed"); - - 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); + + if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 1)) + { + nat_elog_notice ("in2out flow hash add failed"); + if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 0)) + { + nat_elog_warn ("out2in flow hash del failed"); + } + nat_ed_session_delete (sm, s, thread_index, 1); + return 0; + } + + 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, is_twice_nat_session (s)); + s->nat_proto, is_twice_nat_session (s)); - nat_ha_sadd (&s->in2out.addr, s->in2out.port, &s->out2in.addr, - s->out2in.port, &s->ext_host_addr, s->ext_host_port, - &s->ext_host_nat_addr, s->ext_host_nat_port, - s->in2out.protocol, s->in2out.fib_index, s->flags, - thread_index, 0); + per_vrf_sessions_register_session (s, thread_index); return s; } -static int -next_src_nat (snat_main_t * sm, ip4_header_t * ip, u8 proto, u16 src_port, - u16 dst_port, u32 thread_index, u32 rx_fib_index) -{ - clib_bihash_kv_16_8_t kv, value; - snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - - make_ed_kv (&kv, &ip->src_address, &ip->dst_address, proto, - rx_fib_index, src_port, dst_port); - if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value)) - return 1; - - return 0; -} - static void -create_bypass_for_fwd (snat_main_t * sm, vlib_buffer_t * b, ip4_header_t * ip, - u32 rx_fib_index, u32 thread_index) +create_bypass_for_fwd (snat_main_t *sm, vlib_buffer_t *b, snat_session_t *s, + ip4_header_t *ip, u32 rx_fib_index, u32 thread_index) { - nat_ed_ses_key_t key; clib_bihash_kv_16_8_t kv, value; udp_header_t *udp; - snat_user_t *u; - snat_session_t *s = 0; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - f64 now = vlib_time_now (sm->vlib_main); + vlib_main_t *vm = vlib_get_main (); + f64 now = vlib_time_now (vm); + u16 lookup_sport, lookup_dport; + u8 lookup_protocol; + ip4_address_t lookup_saddr, lookup_daddr; if (ip->protocol == IP_PROTOCOL_ICMP) { - if (get_icmp_o2i_ed_key (b, ip, &key)) + if (nat_get_icmp_session_lookup_values (b, ip, &lookup_saddr, + &lookup_sport, &lookup_daddr, + &lookup_dport, &lookup_protocol)) return; } - else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP) - { - udp = ip4_next_header (ip); - key.r_addr = ip->src_address; - key.l_addr = ip->dst_address; - key.proto = ip->protocol; - key.l_port = udp->dst_port; - key.r_port = udp->src_port; - } else { - key.r_addr = ip->src_address; - key.l_addr = ip->dst_address; - key.proto = ip->protocol; - key.l_port = key.r_port = 0; + if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP) + { + udp = ip4_next_header (ip); + lookup_sport = udp->dst_port; + lookup_dport = udp->src_port; + } + else + { + lookup_sport = 0; + lookup_dport = 0; + } + lookup_saddr.as_u32 = ip->dst_address.as_u32; + lookup_daddr.as_u32 = ip->src_address.as_u32; + lookup_protocol = ip->protocol; } - key.fib_index = 0; - 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)) + init_ed_k (&kv, lookup_saddr, lookup_sport, lookup_daddr, lookup_dport, + rx_fib_index, lookup_protocol); + + 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)); + } + else if (ip->protocol == IP_PROTOCOL_ICMP && + icmp_type_is_error_message + (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)) { - s = pool_elt_at_index (tsm->sessions, value.value); + return; } else { u32 proto; - if (PREDICT_FALSE (nat44_maximum_sessions_exceeded (sm, thread_index))) + if (PREDICT_FALSE + (nat44_ed_maximum_sessions_exceeded + (sm, rx_fib_index, thread_index))) return; - u = nat_user_get_or_create (sm, &ip->dst_address, sm->inside_fib_index, - thread_index); - if (!u) - { - nat_elog_warn ("create NAT user failed"); - return; - } - - s = nat_ed_session_alloc (sm, u, thread_index, now); + s = nat_ed_session_alloc (sm, thread_index, now, ip->protocol); if (!s) { - nat44_delete_user_with_no_session (sm, u, thread_index); nat_elog_warn ("create NAT session failed"); return; } - proto = ip_proto_to_snat_proto (key.proto); + proto = ip_proto_to_nat_proto (ip->protocol); - s->ext_host_addr = key.r_addr; - s->ext_host_port = key.r_port; + s->ext_host_addr = ip->src_address; + s->ext_host_port = lookup_dport; s->flags |= SNAT_SESSION_FLAG_FWD_BYPASS; - s->out2in.addr = key.l_addr; - s->out2in.port = key.l_port; - s->out2in.protocol = proto; - if (proto == ~0) + s->out2in.addr = ip->dst_address; + s->out2in.port = lookup_sport; + s->nat_proto = proto; + if (proto == NAT_PROTOCOL_OTHER) { s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO; s->out2in.port = ip->protocol; } - s->out2in.fib_index = 0; - s->in2out = s->out2in; - user_session_increment (sm, u, 0); + s->out2in.fib_index = rx_fib_index; + s->in2out.addr = s->out2in.addr; + s->in2out.port = s->out2in.port; + s->in2out.fib_index = s->out2in.fib_index; + + nat_6t_i2o_flow_init (sm, thread_index, s, ip->dst_address, lookup_sport, + ip->src_address, lookup_dport, rx_fib_index, + ip->protocol); + nat_6t_flow_txfib_rewrite_set (&s->i2o, rx_fib_index); + if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 1)) + { + nat_elog_notice ("in2out flow add failed"); + nat_ed_session_delete (sm, s, thread_index, 1); + return; + } - kv.value = s - tsm->sessions; - if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &kv, 1)) - nat_elog_notice ("in2out_ed key add failed"); + per_vrf_sessions_register_session (s, thread_index); } if (ip->protocol == IP_PROTOCOL_TCP) { tcp_header_t *tcp = ip4_next_header (ip); - if (nat44_set_tcp_session_state_o2i - (sm, now, s, tcp->flags, tcp->ack_number, tcp->seq_number, - thread_index)) - return; + nat44_set_tcp_session_state_o2i (sm, now, s, tcp->flags, + tcp->ack_number, tcp->seq_number, + thread_index); } /* Accounting */ @@ -425,241 +685,75 @@ create_bypass_for_fwd (snat_main_t * sm, vlib_buffer_t * b, ip4_header_t * ip, nat44_session_update_lru (sm, s, thread_index); } -static inline void -create_bypass_for_fwd_worker (snat_main_t * sm, vlib_buffer_t * b, - ip4_header_t * ip, u32 rx_fib_index) -{ - ip4_header_t ip_wkr = { - .src_address = ip->dst_address, - }; - u32 thread_index = sm->worker_in2out_cb (&ip_wkr, rx_fib_index, 0); - - create_bypass_for_fwd (sm, b, ip, rx_fib_index, thread_index); -} - -#ifndef CLIB_MARCH_VARIANT -u32 -icmp_match_out2in_ed (snat_main_t * sm, vlib_node_runtime_t * node, - u32 thread_index, vlib_buffer_t * b, ip4_header_t * ip, - u8 * p_proto, snat_session_key_t * p_value, - u8 * p_dont_translate, void *d, void *e) +static snat_session_t * +nat44_ed_out2in_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) { - u32 next = ~0, sw_if_index, rx_fib_index; - nat_ed_ses_key_t key; - clib_bihash_kv_16_8_t kv, value; - snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - snat_session_t *s = 0; - u8 dont_translate = 0, is_addr_only, identity_nat; - snat_session_key_t e_key, l_key; - - 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); + clib_bihash_kv_8_8_t kv, value; + snat_static_mapping_t *m; + snat_session_t *s; - if (get_icmp_o2i_ed_key (b, ip, &key)) + if (PREDICT_FALSE ( + nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, thread_index))) { - b->error = node->errors[NAT_OUT2IN_ED_ERROR_UNSUPPORTED_PROTOCOL]; - next = NAT_NEXT_DROP; - goto out; + b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_SESSIONS_EXCEEDED]; + nat_elog_notice ("maximum sessions exceeded"); + return 0; } - 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->out2in_ed, &kv, &value)) + init_nat_k (&kv, ip->dst_address, 0, 0, 0); + if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) { - /* Try to match static mapping */ - e_key.addr = ip->dst_address; - e_key.port = key.l_port; - e_key.protocol = ip_proto_to_snat_proto (key.proto); - e_key.fib_index = rx_fib_index; - if (snat_static_mapping_match - (sm, e_key, &l_key, 1, &is_addr_only, 0, 0, 0, &identity_nat)) - { - if (!sm->forwarding_enabled) - { - /* Don't NAT packet aimed at the intfc address */ - if (PREDICT_FALSE (is_interface_addr (sm, node, sw_if_index, - ip->dst_address.as_u32))) - { - dont_translate = 1; - goto out; - } - b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; - next = NAT_NEXT_DROP; - goto out; - } - else - { - dont_translate = 1; - if (next_src_nat (sm, ip, key.proto, key.l_port, key.r_port, - thread_index, rx_fib_index)) - { - next = NAT_NEXT_IN2OUT_ED_FAST_PATH; - goto out; - } - if (sm->num_workers > 1) - create_bypass_for_fwd_worker (sm, b, ip, rx_fib_index); - else - create_bypass_for_fwd (sm, b, ip, rx_fib_index, thread_index); - goto out; - } - } - - if (PREDICT_FALSE - (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags != - ICMP4_echo_reply - && (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags != - ICMP4_echo_request || !is_addr_only))) - { - b->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE]; - next = NAT_NEXT_DROP; - goto out; - } - - if (PREDICT_FALSE (identity_nat)) - { - dont_translate = 1; - goto out; - } + b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; + return 0; + } - /* Create session initiated by host from external network */ - s = create_session_for_static_mapping_ed (sm, b, l_key, e_key, node, - thread_index, 0, 0, - vlib_time_now - (sm->vlib_main)); + m = pool_elt_at_index (sm->static_mappings, value.value); - if (!s) - { - next = NAT_NEXT_DROP; - goto out; - } - } - else + /* Create a new session */ + s = nat_ed_session_alloc (sm, thread_index, now, ip->protocol); + if (!s) { - if (PREDICT_FALSE - (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags != - ICMP4_echo_reply - && vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags != - ICMP4_echo_request - && !icmp_type_is_error_message (vnet_buffer (b)->ip. - reass.icmp_type_or_tcp_flags))) - { - b->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE]; - next = NAT_NEXT_DROP; - goto out; - } - - s = pool_elt_at_index (tsm->sessions, value.value); + b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_USER_SESS_EXCEEDED]; + nat_elog_warn ("create NAT session failed"); + return 0; } - *p_proto = ip_proto_to_snat_proto (key.proto); -out: - if (s) - *p_value = s->in2out; - *p_dont_translate = dont_translate; - if (d) - *(snat_session_t **) d = s; - return next; -} -#endif - -static snat_session_t * -nat44_ed_out2in_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; - ip_csum_t sum; - snat_session_t *s; - snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - snat_user_t *u; - - old_addr = ip->dst_address.as_u32; - - make_ed_kv (&s_kv, &ip->dst_address, &ip->src_address, ip->protocol, - rx_fib_index, 0, 0); - - if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value)) + s->ext_host_addr.as_u32 = ip->src_address.as_u32; + s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO; + s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; + s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT; + s->out2in.addr.as_u32 = ip->dst_address.as_u32; + s->out2in.fib_index = rx_fib_index; + s->in2out.addr.as_u32 = m->local_addr.as_u32; + s->in2out.fib_index = m->fib_index; + s->in2out.port = s->out2in.port = ip->protocol; + + nat_6t_o2i_flow_init (sm, thread_index, s, ip->dst_address, 0, + ip->src_address, 0, m->fib_index, ip->protocol); + nat_6t_flow_saddr_rewrite_set (&s->i2o, ip->dst_address.as_u32); + if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 1)) { - s = pool_elt_at_index (tsm->sessions, s_value.value); - new_addr = ip->dst_address.as_u32 = s->in2out.addr.as_u32; + nat_elog_notice ("in2out key add failed"); + nat_ed_session_delete (sm, s, thread_index, 1); + return NULL; } - else - { - if (PREDICT_FALSE (nat44_maximum_sessions_exceeded (sm, thread_index))) - { - b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_SESSIONS_EXCEEDED]; - nat_elog_notice ("maximum sessions exceeded"); - return 0; - } - - make_sm_kv (&kv, &ip->dst_address, 0, 0, 0); - if (clib_bihash_search_8_8 - (&sm->static_mapping_by_external, &kv, &value)) - { - b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; - return 0; - } - m = pool_elt_at_index (sm->static_mappings, value.value); - - new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32; - - u = nat_user_get_or_create (sm, &m->local_addr, m->fib_index, - thread_index); - if (!u) - { - b->error = node->errors[NAT_OUT2IN_ED_ERROR_CANNOT_CREATE_USER]; - nat_elog_warn ("create NAT user failed"); - return 0; - } - - /* Create a new session */ - s = nat_ed_session_alloc (sm, u, thread_index, now); - if (!s) - { - b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_USER_SESS_EXCEEDED]; - nat44_delete_user_with_no_session (sm, u, thread_index); - nat_elog_warn ("create NAT session failed"); - return 0; - } - - s->ext_host_addr.as_u32 = ip->src_address.as_u32; - s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO; - s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; - s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT; - s->out2in.addr.as_u32 = old_addr; - s->out2in.fib_index = rx_fib_index; - s->in2out.addr.as_u32 = new_addr; - s->in2out.fib_index = m->fib_index; - s->in2out.port = s->out2in.port = ip->protocol; - user_session_increment (sm, u, 1); - - /* Add to lookup tables */ - s_kv.value = s - tsm->sessions; - if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &s_kv, 1)) - nat_elog_notice ("out2in key add failed"); - - make_ed_kv (&s_kv, &ip->dst_address, &ip->src_address, ip->protocol, - m->fib_index, 0, 0); - s_kv.value = s - tsm->sessions; - if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1)) - nat_elog_notice ("in2out key add failed"); + nat_6t_o2i_flow_init (sm, thread_index, s, ip->src_address, 0, + ip->dst_address, 0, rx_fib_index, ip->protocol); + nat_6t_flow_daddr_rewrite_set (&s->o2i, m->local_addr.as_u32); + nat_6t_flow_txfib_rewrite_set (&s->o2i, m->fib_index); + 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; } - /* Update IP checksum */ - sum = ip->checksum; - sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address); - ip->checksum = ip_csum_fold (sum); - - vnet_buffer (b)->sw_if_index[VLIB_TX] = s->in2out.fib_index; + per_vrf_sessions_register_session (s, thread_index); /* Accounting */ nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b), @@ -673,272 +767,321 @@ nat44_ed_out2in_unknown_proto (snat_main_t * sm, static inline uword nat44_ed_out2in_fast_path_node_fn_inline (vlib_main_t * vm, vlib_node_runtime_t * node, - vlib_frame_t * frame) + vlib_frame_t * frame, + int is_multi_worker) { - 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, fragments = 0; - u32 tcp_closed_drops = 0; - - stats_node_index = sm->ed_out2in_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; + nat_protocol_t proto0; + ip4_header_t *ip0; + snat_session_t *s0 = 0; + clib_bihash_kv_16_8_t kv0, value0; + nat_translation_error_e translation_error = NAT_ED_TRNSL_ERR_SUCCESS; + nat_6t_flow_t *f = 0; + ip4_address_t lookup_saddr, lookup_daddr; + u16 lookup_sport, lookup_dport; + u8 lookup_protocol; + int lookup_skipped = 0; + + b0 = *b; + b++; + + lookup_sport = vnet_buffer (b0)->ip.reass.l4_src_port; + lookup_dport = vnet_buffer (b0)->ip.reass.l4_dst_port; + + /* Prefetch next iteration. */ + if (PREDICT_TRUE (n_left_from >= 2)) + { + vlib_buffer_t *p2; + + p2 = *b; + + vlib_prefetch_buffer_header (p2, LOAD); + + CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD); + } - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + next[0] = vnet_buffer2 (b0)->nat.arc_next; - while (n_left_from > 0 && n_left_to_next > 0) + vnet_buffer (b0)->snat.flags = 0; + ip0 = vlib_buffer_get_current (b0); + + 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)) { - u32 bi0; - vlib_buffer_t *b0; - u32 next0, sw_if_index0, rx_fib_index0, proto0, old_addr0, - new_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); - next0 = nat_buffer_opaque (b0)->arc_next; - - vnet_buffer (b0)->snat.flags = 0; - ip0 = vlib_buffer_get_current (b0); - - 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; + } + + proto0 = ip_proto_to_nat_proto (ip0->protocol); + + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) + { + if (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags != + ICMP4_echo_request && + vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags != + ICMP4_echo_reply && + !icmp_type_is_error_message ( + vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags)) { - 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; + b0->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE]; + next[0] = NAT_NEXT_DROP; goto trace0; } - - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - proto0 = ip_proto_to_snat_proto (ip0->protocol); - - if (PREDICT_FALSE (proto0 == ~0)) + int err = nat_get_icmp_session_lookup_values ( + b0, ip0, &lookup_saddr, &lookup_sport, &lookup_daddr, + &lookup_dport, &lookup_protocol); + if (err != 0) { - next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; + b0->error = node->errors[err]; + next[0] = NAT_NEXT_DROP; goto trace0; } + } + else + { + lookup_saddr.as_u32 = ip0->src_address.as_u32; + lookup_daddr.as_u32 = ip0->dst_address.as_u32; + lookup_protocol = ip0->protocol; + } - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) + /* 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->o2i, b0, lookup_saddr, lookup_sport, + lookup_daddr, lookup_dport, lookup_protocol, + rx_fib_index0) || + (s0->flags & SNAT_SESSION_FLAG_TWICE_NAT && + nat_6t_flow_match (&s0->i2o, b0, lookup_saddr, lookup_sport, + lookup_daddr, lookup_dport, + lookup_protocol, rx_fib_index0)))) { - next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; - goto trace0; + /* yes, this is the droid we're looking for */ + lookup_skipped = 1; + goto skip_lookup; } + s0 = NULL; + } + + init_ed_k (&kv0, lookup_saddr, lookup_sport, lookup_daddr, lookup_dport, + rx_fib_index0, lookup_protocol); - make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address, - ip0->protocol, rx_fib_index0, - vnet_buffer (b0)->ip.reass.l4_dst_port, - vnet_buffer (b0)->ip.reass.l4_src_port); + // lookup flow + if (clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0)) + { + // flow does not exist go slow path + next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; + 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 + 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 (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0)) + if (s0->tcp_closed_timestamp) + { + if (now >= s0->tcp_closed_timestamp) { - next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; - goto trace0; + // session is closed, go slow path, freed in slow path + next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; } - s0 = pool_elt_at_index (tsm->sessions, value0.value); - - if (s0->tcp_close_timestamp) + else { - if (now >= s0->tcp_close_timestamp) - { - // session is closed, go slow path - next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; - } - else - { - // session in transitory timeout, drop - b0->error = node->errors[NAT_OUT2IN_ED_ERROR_TCP_CLOSED]; - ++tcp_closed_drops; - next0 = NAT_NEXT_DROP; - } - goto trace0; + // session in transitory timeout, drop + b0->error = node->errors[NAT_OUT2IN_ED_ERROR_TCP_CLOSED]; + next[0] = NAT_NEXT_DROP; } + goto trace0; + } - // 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) - { - // delete session - nat_free_session_data (sm, s0, thread_index, 0); - nat44_delete_session (sm, s0, thread_index); + // drop if session expired + u64 sess_timeout_time; + sess_timeout_time = + s0->last_heard + (f64) nat44_session_get_timeout (sm, s0); + if (now >= sess_timeout_time) + { + // 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; + } - // session no longer exists, go slow path - next0 = NAT_NEXT_OUT2IN_ED_SLOW_PATH; + if (nat_6t_flow_match (&s0->o2i, b0, lookup_saddr, lookup_sport, + lookup_daddr, lookup_dport, lookup_protocol, + rx_fib_index0)) + { + f = &s0->o2i; + } + else if (s0->flags & SNAT_SESSION_FLAG_TWICE_NAT && + nat_6t_flow_match (&s0->i2o, b0, lookup_saddr, lookup_sport, + lookup_daddr, lookup_dport, lookup_protocol, + rx_fib_index0)) + { + f = &s0->i2o; + } + else + { + /* + * 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_client)))) + { goto trace0; } - // - - old_addr0 = ip0->dst_address.as_u32; - new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32; - vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - if (PREDICT_FALSE (is_twice_nat_session (s0))) - sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, - s0->ext_host_nat_addr.as_u32, ip4_header_t, - src_address); - ip0->checksum = ip_csum_fold (sum0); - - old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port; - - if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) + if (!sm->forwarding_enabled) { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) - { - new_port0 = udp0->dst_port = s0->in2out.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 (is_twice_nat_session (s0)) - { - sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, - s0->ext_host_nat_addr.as_u32, - ip4_header_t, dst_address); - sum0 = - ip_csum_update (sum0, - vnet_buffer (b0)->ip. - reass.l4_src_port, - s0->ext_host_nat_port, ip4_header_t, - length); - tcp0->src_port = s0->ext_host_nat_port; - ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; - } - tcp0->checksum = ip_csum_fold (sum0); - } - tcp_packets++; - if (nat44_set_tcp_session_state_o2i - (sm, now, s0, - vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags, - vnet_buffer (b0)->ip.reass.tcp_ack_number, - vnet_buffer (b0)->ip.reass.tcp_seq_number, thread_index)) - goto trace0; + b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; + next[0] = NAT_NEXT_DROP; + goto trace0; } - else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment - && udp0->checksum) + else { - new_port0 = udp0->dst_port = s0->in2out.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))) + if (nat_6t_flow_match (&s0->i2o, b0, lookup_saddr, lookup_sport, + lookup_daddr, lookup_dport, + lookup_protocol, rx_fib_index0)) { - sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, - s0->ext_host_nat_addr.as_u32, - ip4_header_t, dst_address); - sum0 = - ip_csum_update (sum0, - vnet_buffer (b0)->ip.reass.l4_src_port, - s0->ext_host_nat_port, ip4_header_t, - length); - udp0->src_port = s0->ext_host_nat_port; - ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; + f = &s0->i2o; } - udp0->checksum = ip_csum_fold (sum0); - udp_packets++; - } - else - { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) + else { - new_port0 = udp0->dst_port = s0->in2out.port; - if (PREDICT_FALSE (is_twice_nat_session (s0))) - { - udp0->src_port = s0->ext_host_nat_port; - ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; - } + // FIXME TODO bypass ??? + // create_bypass_for_fwd (sm, b0, s0, ip0, rx_fib_index0, + // thread_index); + 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; } - udp_packets++; } + } + + if (NAT_ED_TRNSL_ERR_SUCCESS != + (translation_error = nat_6t_flow_buf_translate ( + sm, b0, ip0, f, proto0, 0 /* is_output_feature */))) + { + next[0] = NAT_NEXT_DROP; + goto trace0; + } + + switch (proto0) + { + case NAT_PROTOCOL_TCP: + vlib_increment_simple_counter (&sm->counters.fastpath.out2in_ed.tcp, + thread_index, sw_if_index0, 1); + nat44_set_tcp_session_state_o2i (sm, now, s0, + vnet_buffer (b0)->ip. + reass.icmp_type_or_tcp_flags, + vnet_buffer (b0)->ip. + reass.tcp_ack_number, + vnet_buffer (b0)->ip. + reass.tcp_seq_number, + thread_index); + break; + case NAT_PROTOCOL_UDP: + vlib_increment_simple_counter (&sm->counters.fastpath.out2in_ed.udp, + thread_index, sw_if_index0, 1); + break; + case NAT_PROTOCOL_ICMP: + vlib_increment_simple_counter (&sm->counters.fastpath.out2in_ed.icmp, + thread_index, sw_if_index0, 1); + break; + case NAT_PROTOCOL_OTHER: + vlib_increment_simple_counter ( + &sm->counters.fastpath.out2in_ed.other, thread_index, sw_if_index0, + 1); + break; + } - /* 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))) + trace0: + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + nat44_ed_out2in_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next[0]; + t->is_slow_path = 0; + t->translation_error = translation_error; + clib_memcpy (&t->search_key, &kv0, sizeof (t->search_key)); + t->lookup_skipped = lookup_skipped; + + if (s0) { - nat44_ed_out2in_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - t->next_index = next0; - t->is_slow_path = 0; - - if (s0) - t->session_index = s0 - tsm->sessions; - else - t->session_index = ~0; + t->session_index = s0 - tsm->sessions; + clib_memcpy (&t->i2of, &s0->i2o, sizeof (t->i2of)); + clib_memcpy (&t->o2if, &s0->o2i, sizeof (t->o2if)); + t->translation_via_i2of = (&s0->i2o == f); } + else + { + t->session_index = ~0; + } + } - pkts_processed += next0 == 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. + out2in_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_OUT2IN_ED_ERROR_OUT2IN_PACKETS, - pkts_processed); - vlib_node_increment_counter (vm, stats_node_index, - NAT_OUT2IN_ED_ERROR_TCP_PACKETS, tcp_packets); - vlib_node_increment_counter (vm, stats_node_index, - NAT_OUT2IN_ED_ERROR_UDP_PACKETS, udp_packets); - vlib_node_increment_counter (vm, stats_node_index, - NAT_OUT2IN_ED_ERROR_ICMP_PACKETS, - icmp_packets); - vlib_node_increment_counter (vm, stats_node_index, - NAT_OUT2IN_ED_ERROR_OTHER_PACKETS, - other_packets); - vlib_node_increment_counter (vm, stats_node_index, - NAT_OUT2IN_ED_ERROR_FRAGMENTS, fragments); + vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts, + frame->n_vectors); return frame->n_vectors; } @@ -947,339 +1090,276 @@ nat44_ed_out2in_slow_path_node_fn_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { - 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, fragments = 0; - - stats_node_index = sm->ed_out2in_slowpath_node_index; + snat_static_mapping_t *m; 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; + nat_protocol_t proto0; + ip4_header_t *ip0; + udp_header_t *udp0; + icmp46_header_t *icmp0; + snat_session_t *s0 = 0; + clib_bihash_kv_16_8_t kv0, value0; + lb_nat_type_t lb_nat0; + twice_nat_type_t twice_nat0; + u8 identity_nat0; + ip4_address_t sm_addr; + u16 sm_port; + u32 sm_fib_index; + nat_translation_error_e translation_error = NAT_ED_TRNSL_ERR_SUCCESS; + + b0 = *b; + next[0] = vnet_buffer2 (b0)->nat.arc_next; + + vnet_buffer (b0)->snat.flags = 0; + ip0 = vlib_buffer_get_current (b0); + + 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; + } - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + udp0 = ip4_next_header (ip0); + icmp0 = (icmp46_header_t *) udp0; + proto0 = ip_proto_to_nat_proto (ip0->protocol); - while (n_left_from > 0 && n_left_to_next > 0) + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) { - u32 bi0; - vlib_buffer_t *b0; - u32 next0, sw_if_index0, rx_fib_index0, proto0, old_addr0, - new_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; - snat_session_key_t e_key0, l_key0; - lb_nat_type_t lb_nat0; - twice_nat_type_t twice_nat0; - u8 identity_nat0; - - /* speculatively enqueue b0 to the current next frame */ - bi0 = from[0]; - to_next[0] = bi0; - from += 1; - to_next += 1; - n_left_from -= 1; - n_left_to_next -= 1; - - b0 = vlib_get_buffer (vm, bi0); - next0 = nat_buffer_opaque (b0)->arc_next; - - vnet_buffer (b0)->snat.flags = 0; - ip0 = vlib_buffer_get_current (b0); - - 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)) + s0 = nat44_ed_out2in_slowpath_unknown_proto ( + sm, b0, ip0, rx_fib_index0, thread_index, now, vm, node); + if (!sm->forwarding_enabled) { - 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; + if (!s0) + next[0] = NAT_NEXT_DROP; } - - 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 == ~0)) + if (NAT_NEXT_DROP != next[0] && + NAT_ED_TRNSL_ERR_SUCCESS != + (translation_error = nat_6t_flow_buf_translate ( + sm, b0, ip0, &s0->o2i, proto0, 0 /* is_output_feature */))) { - s0 = - nat44_ed_out2in_unknown_proto (sm, b0, ip0, rx_fib_index0, - thread_index, now, vm, node); - if (!sm->forwarding_enabled) - { - if (!s0) - next0 = NAT_NEXT_DROP; - } - other_packets++; goto trace0; } - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) + vlib_increment_simple_counter (&sm->counters.slowpath. + out2in_ed.other, thread_index, + sw_if_index0, 1); + goto trace0; + } + + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) + { + next[0] = icmp_out2in_ed_slow_path + (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, + next[0], now, thread_index, &s0); + + if (NAT_NEXT_DROP != next[0] && s0 && + NAT_ED_TRNSL_ERR_SUCCESS != + (translation_error = nat_6t_flow_buf_translate ( + sm, b0, ip0, &s0->o2i, proto0, 0 /* is_output_feature */))) { - next0 = icmp_out2in_ed_slow_path - (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, - next0, now, thread_index, &s0); - icmp_packets++; goto trace0; } - make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address, - ip0->protocol, rx_fib_index0, - vnet_buffer (b0)->ip.reass.l4_dst_port, - vnet_buffer (b0)->ip.reass.l4_src_port); + vlib_increment_simple_counter (&sm->counters.slowpath. + out2in_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); - s0 = NULL; - if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0)) - { - s0 = pool_elt_at_index (tsm->sessions, value0.value); + s0 = NULL; + if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0)) + { + ASSERT (thread_index == ed_value_get_thread_index (&value0)); + s0 = + pool_elt_at_index (tsm->sessions, + ed_value_get_session_index (&value0)); - if (s0->tcp_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; - } + if (s0->tcp_closed_timestamp && now >= s0->tcp_closed_timestamp) + { + nat_free_session_data (sm, s0, thread_index, 0); + nat_ed_session_delete (sm, s0, thread_index, 1); + s0 = NULL; } + } - if (!s0) + if (!s0) + { + /* Try to match static mapping by external address and port, + destination address and port in packet */ + + if (snat_static_mapping_match + (sm, ip0->dst_address, + vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, + proto0, &sm_addr, &sm_port, &sm_fib_index, 1, 0, + &twice_nat0, &lb_nat0, &ip0->src_address, &identity_nat0, &m)) { - /* Try to match static mapping by external address and port, - destination address and port in packet */ - e_key0.addr = ip0->dst_address; - e_key0.port = vnet_buffer (b0)->ip.reass.l4_dst_port; - e_key0.protocol = proto0; - e_key0.fib_index = rx_fib_index0; - - if (snat_static_mapping_match (sm, e_key0, &l_key0, 1, 0, - &twice_nat0, &lb_nat0, - &ip0->src_address, - &identity_nat0)) + /* + * 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_client)))) { - /* - * 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_client)))) - { - goto trace0; - } + goto trace0; + } - if (!sm->forwarding_enabled) + if (!sm->forwarding_enabled) + { + b0->error = + node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; + next[0] = NAT_NEXT_DROP; + } + else + { + if (next_src_nat + (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port, + vnet_buffer (b0)->ip.reass.l4_dst_port, + thread_index, rx_fib_index0)) { - b0->error = - node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; - next0 = NAT_NEXT_DROP; + next[0] = NAT_NEXT_IN2OUT_ED_FAST_PATH; } else { - if (next_src_nat (sm, ip0, ip0->protocol, - vnet_buffer (b0)->ip. - reass.l4_src_port, - vnet_buffer (b0)->ip. - reass.l4_dst_port, thread_index, - rx_fib_index0)) - { - next0 = NAT_NEXT_IN2OUT_ED_FAST_PATH; - goto trace0; - } - if (sm->num_workers > 1) - create_bypass_for_fwd_worker (sm, b0, ip0, - rx_fib_index0); - else - create_bypass_for_fwd (sm, b0, ip0, rx_fib_index0, - thread_index); + create_bypass_for_fwd (sm, b0, s0, ip0, rx_fib_index0, + thread_index); } - goto trace0; } + goto trace0; + } - if (PREDICT_FALSE (identity_nat0)) - goto trace0; + if (PREDICT_FALSE (identity_nat0)) + goto trace0; - if ((proto0 == SNAT_PROTOCOL_TCP) - && !tcp_flags_is_init (vnet_buffer (b0)->ip. - reass.icmp_type_or_tcp_flags)) - { - b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN]; - next0 = NAT_NEXT_DROP; - goto trace0; - } + if ((proto0 == NAT_PROTOCOL_TCP) + && !tcp_flags_is_init (vnet_buffer (b0)->ip. + reass.icmp_type_or_tcp_flags)) + { + b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN]; + next[0] = NAT_NEXT_DROP; + goto trace0; + } - /* Create session initiated by host from external network */ - s0 = create_session_for_static_mapping_ed (sm, b0, l_key0, - e_key0, node, - thread_index, - twice_nat0, - lb_nat0, now); - if (!s0) - { - next0 = NAT_NEXT_DROP; - goto trace0; - } + /* Create session initiated by host from external network */ + s0 = create_session_for_static_mapping_ed (sm, b0, + sm_addr, sm_port, + sm_fib_index, + ip0->dst_address, + vnet_buffer (b0)-> + ip.reass.l4_dst_port, + rx_fib_index0, proto0, + node, rx_fib_index0, + thread_index, twice_nat0, + lb_nat0, now, m); + if (!s0) + { + next[0] = NAT_NEXT_DROP; + goto trace0; } + } - old_addr0 = ip0->dst_address.as_u32; - new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32; - vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; + if (NAT_ED_TRNSL_ERR_SUCCESS != + (translation_error = nat_6t_flow_buf_translate ( + sm, b0, ip0, &s0->o2i, proto0, 0 /* is_output_feature */))) + { + next[0] = NAT_NEXT_DROP; + goto trace0; + } - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - if (PREDICT_FALSE (is_twice_nat_session (s0))) - sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, - s0->ext_host_nat_addr.as_u32, ip4_header_t, - src_address); - ip0->checksum = ip_csum_fold (sum0); + if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) + { + vlib_increment_simple_counter (&sm->counters.slowpath.out2in_ed.tcp, + thread_index, sw_if_index0, 1); + nat44_set_tcp_session_state_o2i (sm, now, s0, + vnet_buffer (b0)->ip. + reass.icmp_type_or_tcp_flags, + vnet_buffer (b0)->ip. + reass.tcp_ack_number, + vnet_buffer (b0)->ip. + reass.tcp_seq_number, + thread_index); + } + else + { + vlib_increment_simple_counter (&sm->counters.slowpath.out2in_ed.udp, + thread_index, sw_if_index0, 1); + } - old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port; + /* Accounting */ + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (vm, b0), + thread_index); + /* Per-user LRU list maintenance */ + nat44_session_update_lru (sm, s0, thread_index); - if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) - { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) - { - new_port0 = udp0->dst_port = s0->in2out.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 (is_twice_nat_session (s0)) - { - sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, - s0->ext_host_nat_addr.as_u32, - ip4_header_t, dst_address); - sum0 = - ip_csum_update (sum0, - vnet_buffer (b0)->ip. - reass.l4_src_port, - s0->ext_host_nat_port, ip4_header_t, - length); - tcp0->src_port = s0->ext_host_nat_port; - ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; - } - tcp0->checksum = ip_csum_fold (sum0); - } - tcp_packets++; - if (nat44_set_tcp_session_state_o2i - (sm, now, s0, - vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags, - vnet_buffer (b0)->ip.reass.tcp_ack_number, - vnet_buffer (b0)->ip.reass.tcp_seq_number, thread_index)) - goto trace0; - } - else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment - && udp0->checksum) + trace0: + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + nat44_ed_out2in_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next[0]; + t->is_slow_path = 1; + t->translation_error = translation_error; + clib_memcpy (&t->search_key, &kv0, sizeof (t->search_key)); + + if (s0) { - new_port0 = udp0->dst_port = s0->in2out.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->src_address.as_u32, - s0->ext_host_nat_addr.as_u32, - ip4_header_t, dst_address); - sum0 = - ip_csum_update (sum0, - vnet_buffer (b0)->ip.reass.l4_src_port, - s0->ext_host_nat_port, ip4_header_t, - length); - udp0->src_port = s0->ext_host_nat_port; - ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; - } - udp0->checksum = ip_csum_fold (sum0); - udp_packets++; + t->session_index = s0 - tsm->sessions; + clib_memcpy (&t->i2of, &s0->i2o, sizeof (t->i2of)); + clib_memcpy (&t->o2if, &s0->o2i, sizeof (t->o2if)); } else { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) - { - new_port0 = udp0->dst_port = s0->in2out.port; - if (PREDICT_FALSE (is_twice_nat_session (s0))) - { - udp0->src_port = s0->ext_host_nat_port; - ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; - } - } - udp_packets++; - } - - /* Accounting */ - nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain (vm, b0), - thread_index); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s0, thread_index); - - trace0: - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - nat44_ed_out2in_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - t->next_index = next0; - t->is_slow_path = 1; - - if (s0) - t->session_index = s0 - tsm->sessions; - else - t->session_index = ~0; + t->session_index = ~0; } + } - pkts_processed += next0 == 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.slowpath. + out2in_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_OUT2IN_ED_ERROR_OUT2IN_PACKETS, - pkts_processed); - vlib_node_increment_counter (vm, stats_node_index, - NAT_OUT2IN_ED_ERROR_TCP_PACKETS, tcp_packets); - vlib_node_increment_counter (vm, stats_node_index, - NAT_OUT2IN_ED_ERROR_UDP_PACKETS, udp_packets); - vlib_node_increment_counter (vm, stats_node_index, - NAT_OUT2IN_ED_ERROR_ICMP_PACKETS, - icmp_packets); - vlib_node_increment_counter (vm, stats_node_index, - NAT_OUT2IN_ED_ERROR_OTHER_PACKETS, - other_packets); - vlib_node_increment_counter (vm, stats_node_index, - NAT_OUT2IN_ED_ERROR_FRAGMENTS, fragments); + vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts, + frame->n_vectors); + return frame->n_vectors; } @@ -1287,7 +1367,14 @@ VLIB_NODE_FN (nat44_ed_out2in_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { - return nat44_ed_out2in_fast_path_node_fn_inline (vm, node, frame); + if (snat_main.num_workers > 1) + { + return nat44_ed_out2in_fast_path_node_fn_inline (vm, node, frame, 1); + } + else + { + return nat44_ed_out2in_fast_path_node_fn_inline (vm, node, frame, 0); + } } /* *INDENT-OFF* */ @@ -1329,7 +1416,8 @@ 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, "out2in next_index %d", t->next_index); + return format (s, "out2in next_index %d arc_next_index %d", t->next_index, + t->arc_next_index); } VLIB_NODE_FN (nat_pre_out2in_node) (vlib_main_t * vm,