X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fnat%2Fin2out_ed.c;h=9dc68576fd48df8a59b808750fdd1a221bc65fa2;hb=aea54eb912e628fc58b74f9b8259ebcc4986a9c3;hp=49e3812441eb47ed1057dc6e375d2033cde81ab0;hpb=a1018c166a468f7692ab621c743503914266f508;p=vpp.git diff --git a/src/plugins/nat/in2out_ed.c b/src/plugins/nat/in2out_ed.c index 49e3812441e..9dc68576fd4 100644 --- a/src/plugins/nat/in2out_ed.c +++ b/src/plugins/nat/in2out_ed.c @@ -19,21 +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, foreach_nat_in2out_ed_error @@ -45,7 +48,13 @@ typedef struct u32 sw_if_index; u32 next_index; u32 session_index; - u32 is_slow_path; + nat_translation_error_e translation_error; + nat_6t_flow_t i2of; + nat_6t_flow_t o2if; + clib_bihash_kv_16_8_t search_key; + u8 is_slow_path; + u8 translation_via_i2of; + u8 lookup_skipped; } nat_in2out_ed_trace_t; static u8 * @@ -62,157 +71,39 @@ format_nat_in2out_ed_trace (u8 * s, va_list * args) s = format (s, "%s: sw_if_index %d, next index %d, session %d", tag, t->sw_if_index, t->next_index, t->session_index); - - return s; -} - -#ifndef CLIB_MARCH_VARIANT -int -nat44_i2o_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg) -{ - snat_main_t *sm = &snat_main; - nat44_is_idle_session_ctx_t *ctx = arg; - snat_session_t *s; - u64 sess_timeout_time; - u8 proto; - u16 r_port, l_port; - ip4_address_t *l_addr, *r_addr; - u32 fib_index; - clib_bihash_kv_16_8_t ed_kv; - int i; - snat_address_t *a; - snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data, - ctx->thread_index); - - ASSERT (ctx->thread_index == ed_value_get_thread_index (kv)); - s = pool_elt_at_index (tsm->sessions, ed_value_get_session_index (kv)); - sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s); - if (ctx->now >= sess_timeout_time) + if (~0 != t->session_index) { - if (is_fwd_bypass_session (s)) - goto delete; - - l_addr = &s->out2in.addr; - r_addr = &s->ext_host_addr; - fib_index = s->out2in.fib_index; - if (snat_is_unk_proto_session (s)) + s = format (s, ", translation result '%U' via %s", + format_nat_ed_translation_error, t->translation_error, + t->translation_via_i2of ? "i2of" : "o2if"); + s = format (s, "\n i2of %U", format_nat_6t_flow, &t->i2of); + s = format (s, "\n o2if %U", format_nat_6t_flow, &t->o2if); + } + if (!t->is_slow_path) + { + if (t->lookup_skipped) { - proto = s->in2out.port; - r_port = 0; - l_port = 0; + s = format (s, "\n lookup skipped - cached session index used"); } else { - proto = nat_proto_to_ip_proto (s->nat_proto); - l_port = s->out2in.port; - r_port = s->ext_host_port; + s = format (s, "\n search key %U", format_ed_session_kvp, + &t->search_key); } - init_ed_k (&ed_kv, *l_addr, l_port, *r_addr, r_port, fib_index, proto); - if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &ed_kv, 0)) - nat_elog_warn ("out2in_ed key del failed"); - - if (snat_is_unk_proto_session (s)) - goto delete; - - snat_ipfix_logging_nat44_ses_delete (ctx->thread_index, - s->in2out.addr.as_u32, - s->out2in.addr.as_u32, - s->nat_proto, - s->in2out.port, - s->out2in.port, - s->in2out.fib_index); - - nat_syslog_nat44_sdel (s->user_index, s->in2out.fib_index, - &s->in2out.addr, s->in2out.port, - &s->ext_host_nat_addr, s->ext_host_nat_port, - &s->out2in.addr, s->out2in.port, - &s->ext_host_addr, s->ext_host_port, - s->nat_proto, is_twice_nat_session (s)); - - nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr, - 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++) - { - // TODO FIXME this is obviously broken - which address should be - // freed here?! - a = sm->twice_nat_addresses + i; - if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32) - { - snat_free_outside_address_and_port (sm->twice_nat_addresses, - ctx->thread_index, - &s->ext_host_nat_addr, - s->ext_host_nat_port, - s->nat_proto); - break; - } - } - } - - if (snat_is_session_static (s)) - goto delete; - - snat_free_outside_address_and_port (sm->addresses, ctx->thread_index, - &s->out2in.addr, s->out2in.port, - s->nat_proto); - delete: - nat_ed_session_delete (sm, s, ctx->thread_index, 1); - return 1; } - return 0; -} -#endif - -static inline u32 -icmp_in2out_ed_slow_path (snat_main_t * sm, vlib_buffer_t * b0, - ip4_header_t * ip0, icmp46_header_t * icmp0, - u32 sw_if_index0, u32 rx_fib_index0, - vlib_node_runtime_t * node, u32 next0, f64 now, - u32 thread_index, snat_session_t ** p_s0) -{ - vlib_main_t *vm = vlib_get_main (); - - next0 = icmp_in2out (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, - next0, thread_index, p_s0, 0); - snat_session_t *s0 = *p_s0; - if (PREDICT_TRUE (next0 != NAT_NEXT_DROP && s0)) - { - /* Accounting */ - nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain - (vm, b0), thread_index); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s0, thread_index); - } - return next0; -} - -static_always_inline u16 -snat_random_port (u16 min, u16 max) -{ - snat_main_t *sm = &snat_main; - return min + random_u32 (&sm->random_seed) / - (random_u32_max () / (max - min + 1) + 1); + return s; } static int -nat_ed_alloc_addr_and_port (snat_main_t * sm, u32 rx_fib_index, - u32 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 * allocated_addr, - u16 * allocated_port, - clib_bihash_kv_16_8_t * out2in_ed_kv) +nat_ed_alloc_addr_and_port (snat_main_t *sm, u32 rx_fib_index, u32 nat_proto, + u32 thread_index, ip4_address_t r_addr, u16 r_port, + u8 proto, u16 port_per_thread, + u32 snat_thread_index, snat_session_t *s, + ip4_address_t *outside_addr, u16 *outside_port) { int i; snat_address_t *a, *ga = 0; - u32 portnum; - snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; const u16 port_thread_offset = (port_per_thread * snat_thread_index) + 1024; @@ -221,38 +112,50 @@ nat_ed_alloc_addr_and_port (snat_main_t * sm, u32 rx_fib_index, a = sm->addresses + i; switch (nat_proto) { -#define _(N, j, n, unused) \ - case NAT_PROTOCOL_##N: \ - if (a->fib_index == rx_fib_index) \ - { \ - u16 port = snat_random_port (1, port_per_thread); \ - u16 attempts = port_per_thread; \ - while (attempts > 0) \ - { \ - --attempts; \ - portnum = port_thread_offset + port; \ - init_ed_kv (out2in_ed_kv, a->addr, \ - clib_host_to_net_u16 (portnum), 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[portnum]; \ - a->busy_##n##_ports_per_thread[thread_index]++; \ - a->busy_##n##_ports++; \ - *allocated_addr = a->addr; \ - *allocated_port = clib_host_to_net_u16 (portnum); \ - return 0; \ - } \ - port = (port + 1) % port_per_thread; \ - } \ - } \ - else if (a->fib_index == ~0) \ - { \ - ga = a; \ - } \ +#define _(N, j, n, unused) \ + case NAT_PROTOCOL_##N: \ + if (a->fib_index == rx_fib_index) \ + { \ + s->o2i.match.daddr = a->addr; \ + /* first try port suggested by caller */ \ + u16 port = clib_net_to_host_u16 (*outside_port); \ + u16 port_offset = port - port_thread_offset; \ + if (port <= port_thread_offset || \ + port > port_thread_offset + port_per_thread) \ + { \ + /* need to pick a different port, suggested port doesn't fit in \ + * this thread's port range */ \ + port_offset = snat_random_port (0, port_per_thread - 1); \ + port = port_thread_offset + port_offset; \ + } \ + u16 attempts = ED_PORT_ALLOC_ATTEMPTS; \ + do \ + { \ + if (NAT_PROTOCOL_ICMP == nat_proto) \ + { \ + s->o2i.match.sport = clib_host_to_net_u16 (port); \ + } \ + s->o2i.match.dport = clib_host_to_net_u16 (port); \ + if (0 == \ + nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 2)) \ + { \ + ++a->busy_##n##_port_refcounts[port]; \ + a->busy_##n##_ports_per_thread[thread_index]++; \ + a->busy_##n##_ports++; \ + *outside_addr = a->addr; \ + *outside_port = clib_host_to_net_u16 (port); \ + return 0; \ + } \ + port_offset = snat_random_port (0, port_per_thread - 1); \ + port = port_thread_offset + port_offset; \ + --attempts; \ + } \ + while (attempts > 0); \ + } \ + else if (a->fib_index == ~0) \ + { \ + ga = a; \ + } \ break; foreach_nat_protocol; @@ -279,7 +182,7 @@ nat_ed_alloc_addr_and_port (snat_main_t * sm, u32 rx_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; } @@ -311,28 +214,51 @@ nat_outside_fib_index_lookup (snat_main_t * sm, ip4_address_t addr) return ~0; } +static_always_inline int +nat44_ed_external_sm_lookup (snat_main_t *sm, ip4_address_t match_addr, + u16 match_port, nat_protocol_t match_protocol, + u32 match_fib_index, ip4_address_t *daddr, + u16 *dport) +{ + clib_bihash_kv_8_8_t kv, value; + init_nat_k (&kv, match_addr, match_port, match_fib_index, match_protocol); + if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) + { + /* Try address only mapping */ + init_nat_k (&kv, match_addr, 0, 0, 0); + if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, + &value)) + return 0; + } + + snat_static_mapping_t *m = + pool_elt_at_index (sm->static_mappings, value.value); + *daddr = m->local_addr; + if (dport) + { + /* Address only mapping doesn't change port */ + *dport = is_addr_only_static_mapping (m) ? match_port : m->local_port; + } + return 1; +} + static u32 -slow_path_ed (snat_main_t * sm, - vlib_buffer_t * b, - ip4_address_t l_addr, - ip4_address_t r_addr, - u16 l_port, - u16 r_port, - u8 proto, - u32 rx_fib_index, - snat_session_t ** sessionp, - vlib_node_runtime_t * node, u32 next, u32 thread_index, f64 now) +slow_path_ed (snat_main_t *sm, vlib_buffer_t *b, ip4_address_t l_addr, + ip4_address_t r_addr, u16 l_port, u16 r_port, u8 proto, + u32 rx_fib_index, snat_session_t **sessionp, + vlib_node_runtime_t *node, u32 next, u32 thread_index, f64 now) { snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - clib_bihash_kv_16_8_t out2in_ed_kv; - nat44_is_idle_session_ctx_t ctx; - ip4_address_t allocated_addr; - u16 allocated_port; - u8 identity_nat; + ip4_address_t outside_addr; + u16 outside_port; + u32 outside_fib_index; + u8 is_identity_nat; u32 nat_proto = ip_proto_to_nat_proto (proto); snat_session_t *s = NULL; lb_nat_type_t lb = 0; + ip4_address_t daddr = r_addr; + u16 dport = r_port; if (PREDICT_TRUE (nat_proto == NAT_PROTOCOL_TCP)) { @@ -358,99 +284,126 @@ slow_path_ed (snat_main_t * sm, } } + outside_fib_index = sm->outside_fib_index; + + switch (vec_len (sm->outside_fibs)) + { + case 0: + outside_fib_index = sm->outside_fib_index; + break; + case 1: + outside_fib_index = sm->outside_fibs[0].fib_index; + break; + default: + outside_fib_index = nat_outside_fib_index_lookup (sm, r_addr); + break; + } + ip4_address_t sm_addr; u16 sm_port; u32 sm_fib_index; /* First try to match static mapping by local address and port */ - if (snat_static_mapping_match - (sm, l_addr, l_port, rx_fib_index, nat_proto, &sm_addr, &sm_port, - &sm_fib_index, 0, 0, 0, &lb, 0, &identity_nat)) + int is_sm; + if (snat_static_mapping_match (sm, l_addr, l_port, rx_fib_index, nat_proto, + &sm_addr, &sm_port, &sm_fib_index, 0, 0, 0, + &lb, 0, &is_identity_nat, 0)) + { + is_sm = 0; + } + else + { + is_sm = 1; + } + + if (PREDICT_FALSE (is_sm && is_identity_nat)) + { + *sessionp = NULL; + return next; + } + + s = nat_ed_session_alloc (sm, thread_index, now, proto); + ASSERT (s); + + if (!is_sm) { - s = nat_ed_session_alloc (sm, thread_index, now, proto); - if (!s) - { - nat_elog_warn ("create NAT session failed"); - b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED]; - return NAT_NEXT_DROP; - } s->in2out.addr = l_addr; s->in2out.port = l_port; s->nat_proto = nat_proto; s->in2out.fib_index = rx_fib_index; - s->out2in.fib_index = sm->outside_fib_index; + s->out2in.fib_index = outside_fib_index; + + // suggest using local port to allocation function + outside_port = l_port; + + // hairpinning? + int is_hairpinning = nat44_ed_external_sm_lookup ( + sm, r_addr, r_port, nat_proto, outside_fib_index, &daddr, &dport); + s->flags |= is_hairpinning * SNAT_SESSION_FLAG_HAIRPINNING; - switch (vec_len (sm->outside_fibs)) + // destination addr/port updated with real values in + // nat_ed_alloc_addr_and_port + nat_6t_o2i_flow_init (sm, thread_index, s, daddr, dport, daddr, 0, + s->out2in.fib_index, proto); + nat_6t_flow_daddr_rewrite_set (&s->o2i, l_addr.as_u32); + if (NAT_PROTOCOL_ICMP == nat_proto) { - case 0: - s->out2in.fib_index = sm->outside_fib_index; - break; - case 1: - s->out2in.fib_index = sm->outside_fibs[0].fib_index; - break; - default: - s->out2in.fib_index = nat_outside_fib_index_lookup (sm, r_addr); - break; + nat_6t_flow_icmp_id_rewrite_set (&s->o2i, l_port); } + else + { + nat_6t_flow_dport_rewrite_set (&s->o2i, l_port); + } + nat_6t_flow_txfib_rewrite_set (&s->o2i, rx_fib_index); - /* Try to create dynamic translation */ - if (nat_ed_alloc_addr_and_port (sm, rx_fib_index, nat_proto, - thread_index, r_addr, r_port, proto, - sm->port_per_thread, - tsm->snat_thread_index, s, - &allocated_addr, - &allocated_port, &out2in_ed_kv)) + if (nat_ed_alloc_addr_and_port ( + sm, rx_fib_index, nat_proto, thread_index, daddr, dport, proto, + sm->port_per_thread, tsm->snat_thread_index, s, &outside_addr, + &outside_port)) { nat_elog_notice ("addresses exhausted"); b->error = node->errors[NAT_IN2OUT_ED_ERROR_OUT_OF_PORTS]; nat_ed_session_delete (sm, s, thread_index, 1); return NAT_NEXT_DROP; } - s->out2in.addr = allocated_addr; - s->out2in.port = allocated_port; + s->out2in.addr = outside_addr; + s->out2in.port = outside_port; } else { - if (PREDICT_FALSE (identity_nat)) - { - *sessionp = NULL; - return next; - } - s = nat_ed_session_alloc (sm, thread_index, now, proto); - if (!s) - { - nat_elog_warn ("create NAT session failed"); - b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED]; - return NAT_NEXT_DROP; - } - s->out2in.addr = sm_addr; - s->out2in.port = sm_port; + // static mapping + s->out2in.addr = outside_addr = sm_addr; + s->out2in.port = outside_port = sm_port; s->in2out.addr = l_addr; s->in2out.port = l_port; s->nat_proto = nat_proto; s->in2out.fib_index = rx_fib_index; - s->out2in.fib_index = sm->outside_fib_index; - switch (vec_len (sm->outside_fibs)) - { - case 0: - s->out2in.fib_index = sm->outside_fib_index; - break; - case 1: - s->out2in.fib_index = sm->outside_fibs[0].fib_index; - break; - default: - s->out2in.fib_index = nat_outside_fib_index_lookup (sm, r_addr); - break; - } - + s->out2in.fib_index = outside_fib_index; s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; - init_ed_kv (&out2in_ed_kv, sm_addr, sm_port, r_addr, r_port, - s->out2in.fib_index, proto, thread_index, - s - tsm->sessions); - if (clib_bihash_add_or_overwrite_stale_16_8 - (&sm->out2in_ed, &out2in_ed_kv, nat44_o2i_ed_is_idle_session_cb, - &ctx)) - nat_elog_notice ("out2in-ed key add failed"); + // hairpinning? + int is_hairpinning = nat44_ed_external_sm_lookup ( + sm, r_addr, r_port, nat_proto, outside_fib_index, &daddr, &dport); + s->flags |= is_hairpinning * SNAT_SESSION_FLAG_HAIRPINNING; + + if (NAT_PROTOCOL_ICMP == nat_proto) + { + nat_6t_o2i_flow_init (sm, thread_index, s, daddr, sm_port, sm_addr, + sm_port, s->out2in.fib_index, proto); + nat_6t_flow_icmp_id_rewrite_set (&s->o2i, l_port); + } + else + { + nat_6t_o2i_flow_init (sm, thread_index, s, daddr, dport, sm_addr, + sm_port, s->out2in.fib_index, proto); + nat_6t_flow_dport_rewrite_set (&s->o2i, l_port); + } + nat_6t_flow_daddr_rewrite_set (&s->o2i, l_addr.as_u32); + nat_6t_flow_txfib_rewrite_set (&s->o2i, rx_fib_index); + if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 2)) + { + nat_elog_notice ("out2in key add failed"); + goto error; + } } if (lb) @@ -459,25 +412,34 @@ slow_path_ed (snat_main_t * sm, s->ext_host_addr = r_addr; s->ext_host_port = r_port; - clib_bihash_kv_16_8_t in2out_ed_kv; - init_ed_kv (&in2out_ed_kv, l_addr, l_port, r_addr, r_port, rx_fib_index, - proto, thread_index, s - tsm->sessions); - ctx.now = now; - ctx.thread_index = thread_index; - if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, &in2out_ed_kv, - nat44_i2o_ed_is_idle_session_cb, - &ctx)) - nat_elog_notice ("in2out-ed key add failed"); + nat_6t_i2o_flow_init (sm, thread_index, s, l_addr, l_port, r_addr, r_port, + rx_fib_index, proto); + nat_6t_flow_saddr_rewrite_set (&s->i2o, outside_addr.as_u32); + nat_6t_flow_daddr_rewrite_set (&s->i2o, daddr.as_u32); + if (NAT_PROTOCOL_ICMP == nat_proto) + { + nat_6t_flow_icmp_id_rewrite_set (&s->i2o, outside_port); + } + else + { + nat_6t_flow_sport_rewrite_set (&s->i2o, outside_port); + nat_6t_flow_dport_rewrite_set (&s->i2o, dport); + } + nat_6t_flow_txfib_rewrite_set (&s->i2o, outside_fib_index); - *sessionp = s; + if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 1)) + { + nat_elog_notice ("in2out key add failed"); + goto error; + } /* log NAT event */ - snat_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_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, @@ -486,12 +448,23 @@ slow_path_ed (snat_main_t * sm, &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->nat_proto, s->in2out.fib_index, s->flags, thread_index, 0); + per_vrf_sessions_register_session (s, thread_index); + *sessionp = s; return next; +error: + if (s) + { + if (!is_sm) + { + snat_free_outside_address_and_port (sm->addresses, thread_index, + &outside_addr, outside_port, + nat_proto); + } + nat_ed_session_delete (sm, s, thread_index, 1); + } + *sessionp = s = NULL; + return NAT_NEXT_DROP; } static_always_inline int @@ -506,15 +479,16 @@ nat44_ed_not_translate (snat_main_t * sm, vlib_node_runtime_t * node, udp->src_port, sm->outside_fib_index, ip->protocol); /* NAT packet aimed at external address if has active sessions */ - if (clib_bihash_search_16_8 (&sm->out2in_ed, &kv, &value)) + if (clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value)) { /* or is static mappings */ - ip4_address_t dummy_addr; - u16 dummy_port; - u32 dummy_fib_index; + 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, - &dummy_addr, &dummy_port, &dummy_fib_index, 1, 0, 0, 0, 0, 0)) + &placeholder_addr, &placeholder_port, &placeholder_fib_index, 1, 0, + 0, 0, 0, 0, 0)) return 0; } else @@ -541,8 +515,15 @@ nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip, if (ip->protocol == IP_PROTOCOL_ICMP) { - if (get_icmp_i2o_ed_key (b, ip, 0, ~0, ~0, 0, 0, 0, &kv)) + ip4_address_t lookup_saddr, lookup_daddr; + u16 lookup_sport, lookup_dport; + u8 lookup_protocol; + if (nat_get_icmp_session_lookup_values (b, ip, &lookup_saddr, + &lookup_sport, &lookup_daddr, + &lookup_dport, &lookup_protocol)) return 0; + init_ed_k (&kv, lookup_saddr, lookup_sport, lookup_daddr, lookup_dport, + 0, lookup_protocol); } else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP) { @@ -556,19 +537,18 @@ nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip, ip->protocol); } - if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value)) + if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value)) { ASSERT (thread_index == ed_value_get_thread_index (&value)); s = pool_elt_at_index (tsm->sessions, ed_value_get_session_index (&value)); + if (is_fwd_bypass_session (s)) { if (ip->protocol == IP_PROTOCOL_TCP) { - 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, @@ -589,7 +569,7 @@ static_always_inline int nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip, u16 src_port, u16 dst_port, u32 thread_index, u32 rx_sw_if_index, - u32 tx_sw_if_index) + u32 tx_sw_if_index, f64 now) { clib_bihash_kv_16_8_t kv, value; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; @@ -601,41 +581,41 @@ nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip, /* src NAT check */ init_ed_k (&kv, ip->src_address, src_port, ip->dst_address, dst_port, tx_fib_index, ip->protocol); - if (!clib_bihash_search_16_8 (&sm->out2in_ed, &kv, &value)) + if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value)) { ASSERT (thread_index == ed_value_get_thread_index (&value)); s = pool_elt_at_index (tsm->sessions, ed_value_get_session_index (&value)); - if (nat44_is_ses_closed (s)) + if (nat44_is_ses_closed (s) + && (!s->tcp_closed_timestamp || now >= s->tcp_closed_timestamp)) { nat_free_session_data (sm, s, thread_index, 0); nat_ed_session_delete (sm, s, thread_index, 1); } - else - s->flags |= SNAT_SESSION_FLAG_OUTPUT_FEATURE; return 1; } /* dst NAT check */ init_ed_k (&kv, ip->dst_address, dst_port, ip->src_address, src_port, rx_fib_index, ip->protocol); - if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value)) + if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value)) { ASSERT (thread_index == ed_value_get_thread_index (&value)); s = pool_elt_at_index (tsm->sessions, ed_value_get_session_index (&value)); + if (is_fwd_bypass_session (s)) return 0; /* hairpinning */ /* *INDENT-OFF* */ - pool_foreach (i, sm->output_feature_interfaces, - ({ + pool_foreach (i, sm->output_feature_interfaces) + { if ((nat_interface_is_inside (i)) && (rx_sw_if_index == i->sw_if_index)) return 0; - })); + } /* *INDENT-ON* */ return 1; } @@ -643,140 +623,115 @@ nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip, return 0; } -#ifndef CLIB_MARCH_VARIANT -u32 -icmp_match_in2out_ed (snat_main_t * sm, vlib_node_runtime_t * node, - u32 thread_index, vlib_buffer_t * b, - ip4_header_t * ip, ip4_address_t * addr, - u16 * port, u32 * fib_index, nat_protocol_t * proto, - void *d, void *e, u8 * dont_translate) +static inline u32 +icmp_in2out_ed_slow_path (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip, + icmp46_header_t *icmp, u32 sw_if_index, + u32 rx_fib_index, vlib_node_runtime_t *node, + u32 next, f64 now, u32 thread_index, + nat_protocol_t nat_proto, snat_session_t **s_p) { - u32 sw_if_index; - u32 rx_fib_index; - clib_bihash_kv_16_8_t kv, value; - u32 next = ~0; + vlib_main_t *vm = vlib_get_main (); + u16 checksum; int err; snat_session_t *s = NULL; - u16 l_port = 0, r_port = 0; // initialize to workaround gcc warning - vlib_main_t *vm = vlib_get_main (); - snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - *dont_translate = 0; - - sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX]; - rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index); + u8 lookup_protocol = ip->protocol; + u16 lookup_sport, lookup_dport; + ip4_address_t lookup_saddr, lookup_daddr; - err = - get_icmp_i2o_ed_key (b, ip, rx_fib_index, ~0, ~0, proto, &l_port, - &r_port, &kv); + err = nat_get_icmp_session_lookup_values (b, ip, &lookup_saddr, + &lookup_sport, &lookup_daddr, + &lookup_dport, &lookup_protocol); if (err != 0) { b->error = node->errors[err]; - next = NAT_NEXT_DROP; - goto out; + return NAT_NEXT_DROP; } - if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value)) + if (vnet_buffer (b)->sw_if_index[VLIB_TX] != ~0) { - if (vnet_buffer (b)->sw_if_index[VLIB_TX] != ~0) + if (PREDICT_FALSE (nat44_ed_not_translate_output_feature ( + sm, ip, lookup_sport, lookup_dport, thread_index, sw_if_index, + vnet_buffer (b)->sw_if_index[VLIB_TX], now))) { - if (PREDICT_FALSE - (nat44_ed_not_translate_output_feature - (sm, ip, l_port, r_port, thread_index, - sw_if_index, vnet_buffer (b)->sw_if_index[VLIB_TX]))) - { - *dont_translate = 1; - goto out; - } + return next; } - else + } + else + { + if (PREDICT_FALSE (nat44_ed_not_translate (sm, node, sw_if_index, ip, + NAT_PROTOCOL_ICMP, + rx_fib_index, thread_index))) { - if (PREDICT_FALSE (nat44_ed_not_translate (sm, node, sw_if_index, - ip, NAT_PROTOCOL_ICMP, - rx_fib_index, - thread_index))) - { - *dont_translate = 1; - goto out; - } + return next; } + } - if (PREDICT_FALSE - (icmp_type_is_error_message - (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags))) - { - b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE]; - next = NAT_NEXT_DROP; - goto out; - } + if (PREDICT_FALSE (icmp_type_is_error_message ( + vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags))) + { + b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE]; + return NAT_NEXT_DROP; + } - next = - slow_path_ed (sm, b, ip->src_address, ip->dst_address, l_port, r_port, - ip->protocol, rx_fib_index, &s, node, next, - thread_index, vlib_time_now (vm)); + next = slow_path_ed (sm, b, ip->src_address, ip->dst_address, lookup_sport, + lookup_dport, ip->protocol, rx_fib_index, &s, node, + next, thread_index, vlib_time_now (vm)); - if (PREDICT_FALSE (next == NAT_NEXT_DROP)) - goto out; + if (NAT_NEXT_DROP == next) + goto out; - if (!s) - { - *dont_translate = 1; - goto out; - } - } - else + if (PREDICT_TRUE (!ip4_is_fragment (ip))) { - if (PREDICT_FALSE - (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags != - ICMP4_echo_request - && vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags != - ICMP4_echo_reply - && !icmp_type_is_error_message (vnet_buffer (b)->ip. - reass.icmp_type_or_tcp_flags))) + ip_csum_t sum = ip_incremental_checksum_buffer ( + vm, b, (u8 *) icmp - (u8 *) vlib_buffer_get_current (b), + ntohs (ip->length) - ip4_header_bytes (ip), 0); + checksum = ~ip_csum_fold (sum); + if (PREDICT_FALSE (checksum != 0 && checksum != 0xffff)) { - b->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE]; next = NAT_NEXT_DROP; goto out; } - - ASSERT (thread_index == ed_value_get_thread_index (&value)); - s = - pool_elt_at_index (tsm->sessions, - ed_value_get_session_index (&value)); } + out: - if (s) + if (PREDICT_TRUE (next != NAT_NEXT_DROP && s)) { - *addr = s->out2in.addr; - *port = s->out2in.port; - *fib_index = s->out2in.fib_index; - } - if (d) - { - *(snat_session_t **) d = s; + /* Accounting */ + nat44_session_update_counters ( + s, now, vlib_buffer_length_in_chain (vm, b), thread_index); + /* Per-user LRU list maintenance */ + nat44_session_update_lru (sm, s, thread_index); } + *s_p = s; return next; } -#endif static snat_session_t * -nat44_ed_in2out_unknown_proto (snat_main_t * sm, - vlib_buffer_t * b, - ip4_header_t * ip, - u32 rx_fib_index, - u32 thread_index, - f64 now, - vlib_main_t * vm, vlib_node_runtime_t * node) +nat44_ed_in2out_slowpath_unknown_proto (snat_main_t *sm, vlib_buffer_t *b, + ip4_header_t *ip, u32 rx_fib_index, + u32 thread_index, f64 now, + vlib_main_t *vm, + vlib_node_runtime_t *node) { clib_bihash_kv_8_8_t kv, value; clib_bihash_kv_16_8_t s_kv, s_value; - snat_static_mapping_t *m; - u32 old_addr, new_addr = 0; - ip_csum_t sum; + snat_static_mapping_t *m = NULL; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - snat_session_t *s; + snat_session_t *s = NULL; u32 outside_fib_index = sm->outside_fib_index; int i; - u8 is_sm = 0; + ip4_address_t new_src_addr = { 0 }; + ip4_address_t new_dst_addr = ip->dst_address; + + if (PREDICT_FALSE ( + nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, thread_index))) + { + b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED]; + nat_ipfix_logging_max_sessions (thread_index, + sm->max_translations_per_thread); + nat_elog_notice ("maximum sessions exceeded"); + return 0; + } switch (vec_len (sm->outside_fibs)) { @@ -790,110 +745,105 @@ nat44_ed_in2out_unknown_proto (snat_main_t * sm, outside_fib_index = nat_outside_fib_index_lookup (sm, ip->dst_address); break; } - old_addr = ip->src_address.as_u32; - init_ed_k (&s_kv, ip->src_address, 0, ip->dst_address, 0, rx_fib_index, - ip->protocol); + init_nat_k (&kv, ip->src_address, 0, rx_fib_index, 0); - if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &s_kv, &s_value)) + /* Try to find static mapping first */ + if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value)) { - ASSERT (thread_index == ed_value_get_thread_index (&s_value)); - s = - pool_elt_at_index (tsm->sessions, - ed_value_get_session_index (&s_value)); - new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32; + m = pool_elt_at_index (sm->static_mappings, value.value); + new_src_addr = m->external_addr; } else { - if (PREDICT_FALSE - (nat44_ed_maximum_sessions_exceeded - (sm, rx_fib_index, thread_index))) + pool_foreach (s, tsm->sessions) { - b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED]; - nat_ipfix_logging_max_sessions (thread_index, - sm->max_translations_per_thread); - nat_elog_notice ("maximum sessions exceeded"); - return 0; + if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32) + { + init_ed_k (&s_kv, s->out2in.addr, 0, ip->dst_address, 0, + outside_fib_index, ip->protocol); + if (clib_bihash_search_16_8 (&sm->flow_hash, &s_kv, &s_value)) + { + new_src_addr = s->out2in.addr; + } + break; + } } - init_nat_k (&kv, ip->src_address, 0, rx_fib_index, 0); - - /* Try to find static mapping first */ - if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value)) + if (!new_src_addr.as_u32) { - m = pool_elt_at_index (sm->static_mappings, value.value); - new_addr = ip->src_address.as_u32 = m->external_addr.as_u32; - is_sm = 1; - goto create_ses; - } - else - { - /* *INDENT-OFF* */ - pool_foreach (s, tsm->sessions, { - if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32) - { - new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32; - - init_ed_k(&s_kv, s->out2in.addr, 0, ip->dst_address, 0, outside_fib_index, ip->protocol); - if (clib_bihash_search_16_8 (&sm->out2in_ed, &s_kv, &s_value)) - goto create_ses; - - break; - } - }); - /* *INDENT-ON* */ - for (i = 0; i < vec_len (sm->addresses); i++) { init_ed_k (&s_kv, sm->addresses[i].addr, 0, ip->dst_address, 0, outside_fib_index, ip->protocol); - if (clib_bihash_search_16_8 (&sm->out2in_ed, &s_kv, &s_value)) + if (clib_bihash_search_16_8 (&sm->flow_hash, &s_kv, &s_value)) { - new_addr = ip->src_address.as_u32 = - sm->addresses[i].addr.as_u32; - goto create_ses; + new_src_addr = sm->addresses[i].addr; } } - return 0; } + } - create_ses: - s = nat_ed_session_alloc (sm, thread_index, now, ip->protocol); - if (!s) - { - b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_USER_SESS_EXCEEDED]; - nat_elog_warn ("create NAT session failed"); - return 0; - } + if (!new_src_addr.as_u32) + { + // could not allocate address for translation ... + return 0; + } - s->ext_host_addr.as_u32 = ip->dst_address.as_u32; - s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO; - s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT; - s->out2in.addr.as_u32 = new_addr; - s->out2in.fib_index = outside_fib_index; - s->in2out.addr.as_u32 = old_addr; - s->in2out.fib_index = rx_fib_index; - s->in2out.port = s->out2in.port = ip->protocol; - if (is_sm) - s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; - - /* Add to lookup tables */ - init_ed_kv (&s_kv, s->in2out.addr, 0, ip->dst_address, 0, rx_fib_index, - ip->protocol, thread_index, s - tsm->sessions); - if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1)) - nat_elog_notice ("in2out key add failed"); - - init_ed_kv (&s_kv, s->out2in.addr, 0, ip->dst_address, 0, - outside_fib_index, ip->protocol, thread_index, - s - tsm->sessions); - if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &s_kv, 1)) - nat_elog_notice ("out2in key add failed"); + s = nat_ed_session_alloc (sm, thread_index, now, ip->protocol); + if (!s) + { + b->error = node->errors[NAT_IN2OUT_ED_ERROR_MAX_SESSIONS_EXCEEDED]; + nat_elog_warn ("create NAT session failed"); + return 0; + } + + nat_6t_i2o_flow_init (sm, thread_index, s, ip->src_address, 0, + ip->dst_address, 0, rx_fib_index, ip->protocol); + nat_6t_flow_saddr_rewrite_set (&s->i2o, new_src_addr.as_u32); + nat_6t_flow_txfib_rewrite_set (&s->i2o, outside_fib_index); + + // hairpinning? + int is_hairpinning = + nat44_ed_external_sm_lookup (sm, ip->dst_address, 0, NAT_PROTOCOL_OTHER, + outside_fib_index, &new_dst_addr, NULL); + s->flags |= is_hairpinning * SNAT_SESSION_FLAG_HAIRPINNING; + + nat_6t_flow_daddr_rewrite_set (&s->i2o, new_dst_addr.as_u32); + nat_6t_flow_txfib_rewrite_set (&s->i2o, outside_fib_index); + + nat_6t_o2i_flow_init (sm, thread_index, s, new_dst_addr, 0, new_src_addr, 0, + outside_fib_index, ip->protocol); + nat_6t_flow_saddr_rewrite_set (&s->o2i, ip->dst_address.as_u32); + nat_6t_flow_daddr_rewrite_set (&s->o2i, ip->src_address.as_u32); + nat_6t_flow_txfib_rewrite_set (&s->o2i, rx_fib_index); + + s->ext_host_addr.as_u32 = ip->dst_address.as_u32; + s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO; + s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT; + s->out2in.addr.as_u32 = new_src_addr.as_u32; + s->out2in.fib_index = outside_fib_index; + s->in2out.addr.as_u32 = ip->src_address.as_u32; + s->in2out.fib_index = rx_fib_index; + s->in2out.port = s->out2in.port = ip->protocol; + if (m) + s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; + + if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 1)) + { + nat_elog_notice ("in2out flow hash add failed"); + nat_ed_session_delete (sm, s, thread_index, 1); + return NULL; + } + + if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 1)) + { + nat_elog_notice ("out2in flow hash add failed"); + nat_ed_session_delete (sm, s, thread_index, 1); + return NULL; } - /* Update IP checksum */ - sum = ip->checksum; - sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, src_address); - ip->checksum = ip_csum_fold (sum); + per_vrf_sessions_register_session (s, thread_index); /* Accounting */ nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b), @@ -901,13 +851,6 @@ nat44_ed_in2out_unknown_proto (snat_main_t * sm, /* Per-user LRU list maintenance */ nat44_session_update_lru (sm, s, thread_index); - /* Hairpinning */ - if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0) - nat44_ed_hairpinning_unknown_proto (sm, b, ip); - - if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0) - vnet_buffer (b)->sw_if_index[VLIB_TX] = outside_fib_index; - return s; } @@ -917,287 +860,301 @@ 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_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - - while (n_left_from > 0 && n_left_to_next > 0) + vlib_buffer_t *b0; + u32 sw_if_index0, rx_fib_index0, iph_offset0 = 0; + nat_protocol_t proto0; + ip4_header_t *ip0; + snat_session_t *s0 = 0; + clib_bihash_kv_16_8_t kv0, value0; + nat_translation_error_e translation_error = NAT_ED_TRNSL_ERR_SUCCESS; + nat_6t_flow_t *f = 0; + ip4_address_t lookup_saddr, lookup_daddr; + u16 lookup_sport, lookup_dport; + u8 lookup_protocol; + int lookup_skipped = 0; + + b0 = *b; + b++; + + /* Prefetch next iteration. */ + if (PREDICT_TRUE (n_left_from >= 2)) { - u32 bi0; - vlib_buffer_t *b0; - u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0, - new_addr0, old_addr0; - u16 old_port0, new_port0; - ip4_header_t *ip0; - udp_header_t *udp0; - tcp_header_t *tcp0; - snat_session_t *s0 = 0; - clib_bihash_kv_16_8_t kv0, value0; - ip_csum_t sum0; - - /* speculatively enqueue b0 to the current next frame */ - bi0 = from[0]; - to_next[0] = bi0; - from += 1; - to_next += 1; - n_left_from -= 1; - n_left_to_next -= 1; - - b0 = vlib_get_buffer (vm, bi0); + vlib_buffer_t *p2; - if (is_output_feature) - { - vnet_feature_next (&vnet_buffer2 (b0)->nat.arc_next, b0); - iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length; - } + p2 = *b; - next0 = vnet_buffer2 (b0)->nat.arc_next; + vlib_prefetch_buffer_header (p2, LOAD); - ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + - iph_offset0); + CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD); + } - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - rx_fib_index0 = - fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, - sw_if_index0); + if (is_output_feature) + { + iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length; + } - if (PREDICT_FALSE (ip0->ttl == 1)) - { - vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, - ICMP4_time_exceeded_ttl_exceeded_in_transit, - 0); - next0 = NAT_NEXT_ICMP_ERROR; - goto trace0; - } + next[0] = vnet_buffer2 (b0)->nat.arc_next; - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - proto0 = ip_proto_to_nat_proto (ip0->protocol); + ip0 = + (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + iph_offset0); - if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) - { - next0 = def_slow; - goto trace0; - } + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + rx_fib_index0 = + fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index0); - if (is_output_feature) - { - if (PREDICT_FALSE (nat_not_translate_output_feature_fwd - (sm, ip0, thread_index, now, vm, b0))) - goto trace0; - } + if (PREDICT_FALSE (ip0->ttl == 1)) + { + vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next[0] = NAT_NEXT_ICMP_ERROR; + goto trace0; + } - if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) - { - next0 = def_slow; - goto trace0; - } + proto0 = ip_proto_to_nat_proto (ip0->protocol); - 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 (is_output_feature) + { + if (PREDICT_FALSE + (nat_not_translate_output_feature_fwd + (sm, ip0, thread_index, now, vm, b0))) + goto trace0; + } - // lookup for session - if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0)) + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) + { + if (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags != + ICMP4_echo_request && + vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags != + ICMP4_echo_reply && + !icmp_type_is_error_message ( + vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags)) { - // session does not exist go slow path - next0 = def_slow; + b0->error = node->errors[NAT_IN2OUT_ED_ERROR_BAD_ICMP_TYPE]; + next[0] = NAT_NEXT_DROP; goto trace0; } - 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) + int err = nat_get_icmp_session_lookup_values ( + b0, ip0, &lookup_saddr, &lookup_sport, &lookup_daddr, + &lookup_dport, &lookup_protocol); + if (err != 0) { - if (now >= s0->tcp_closed_timestamp) - { - // session is closed, go slow path - next0 = def_slow; - } - else - { - // session in transitory timeout, drop - b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TCP_CLOSED]; - next0 = NAT_NEXT_DROP; - } + b0->error = node->errors[err]; + next[0] = NAT_NEXT_DROP; goto trace0; } + } + else + { + lookup_protocol = ip0->protocol; + lookup_saddr = ip0->src_address; + lookup_daddr = ip0->dst_address; + lookup_sport = vnet_buffer (b0)->ip.reass.l4_src_port; + lookup_dport = vnet_buffer (b0)->ip.reass.l4_dst_port; + } - // drop if session expired - u64 sess_timeout_time; - sess_timeout_time = s0->last_heard + - (f64) nat44_session_get_timeout (sm, s0); - if (now >= sess_timeout_time) + /* there might be a stashed index in vnet_buffer2 from handoff or + * classify node, see if it can be used */ + if (!pool_is_free_index (tsm->sessions, + vnet_buffer2 (b0)->nat.cached_session_index)) + { + s0 = pool_elt_at_index (tsm->sessions, + vnet_buffer2 (b0)->nat.cached_session_index); + if (PREDICT_TRUE ( + nat_6t_flow_match (&s0->i2o, b0, lookup_saddr, lookup_sport, + lookup_daddr, lookup_dport, lookup_protocol, + rx_fib_index0) + // for some hairpinning cases there are two "i2i" flows instead + // of i2o and o2i as both hosts are on inside + || (s0->flags & SNAT_SESSION_FLAG_HAIRPINNING && + nat_6t_flow_match ( + &s0->o2i, b0, lookup_saddr, lookup_sport, lookup_daddr, + lookup_dport, lookup_protocol, rx_fib_index0)))) { - nat_free_session_data (sm, s0, thread_index, 0); - nat_ed_session_delete (sm, s0, thread_index, 1); - // session is closed, go slow path - next0 = def_slow; - goto trace0; + /* yes, this is the droid we're looking for */ + lookup_skipped = 1; + goto skip_lookup; } + s0 = NULL; + } + + init_ed_k (&kv0, ip0->src_address, lookup_sport, ip0->dst_address, + lookup_dport, rx_fib_index0, lookup_protocol); - b0->flags |= VNET_BUFFER_F_IS_NATED; + // lookup flow + if (clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0)) + { + // flow does not exist go slow path + next[0] = def_slow; + goto trace0; + } - if (!is_output_feature) - vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index; + ASSERT (thread_index == ed_value_get_thread_index (&value0)); + s0 = + pool_elt_at_index (tsm->sessions, + ed_value_get_session_index (&value0)); - 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); + skip_lookup: - old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port; + 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 (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) - { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) - { - new_port0 = udp0->src_port = s0->out2in.port; - sum0 = tcp0->checksum; - sum0 = - ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, dst_address); - sum0 = - ip_csum_update (sum0, old_port0, new_port0, - ip4_header_t, length); - if (PREDICT_FALSE (is_twice_nat_session (s0))) - { - sum0 = - ip_csum_update (sum0, ip0->dst_address.as_u32, - s0->ext_host_addr.as_u32, - ip4_header_t, dst_address); - sum0 = - ip_csum_update (sum0, - vnet_buffer (b0)->ip. - reass.l4_dst_port, s0->ext_host_port, - ip4_header_t, length); - tcp0->dst_port = s0->ext_host_port; - ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; - } - mss_clamping (sm->mss_clamping, tcp0, &sum0); - tcp0->checksum = ip_csum_fold (sum0); - } - 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 (s0->tcp_closed_timestamp) + { + if (now >= s0->tcp_closed_timestamp) { - new_port0 = udp0->src_port = s0->out2in.port; - sum0 = udp0->checksum; - sum0 = - ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - sum0 = - ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, - length); - if (PREDICT_FALSE (is_twice_nat_session (s0))) - { - sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32, - s0->ext_host_addr.as_u32, - ip4_header_t, dst_address); - sum0 = - ip_csum_update (sum0, - vnet_buffer (b0)->ip.reass.l4_dst_port, - s0->ext_host_port, ip4_header_t, length); - udp0->dst_port = s0->ext_host_port; - ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; - } - udp0->checksum = ip_csum_fold (sum0); - udp_packets++; + // session is closed, go slow path, freed in slow path + next[0] = def_slow; } else { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) - { - new_port0 = udp0->src_port = s0->out2in.port; - if (PREDICT_FALSE (is_twice_nat_session (s0))) - { - udp0->dst_port = s0->ext_host_port; - ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; - } - udp_packets++; - } + // session in transitory timeout, drop + b0->error = node->errors[NAT_IN2OUT_ED_ERROR_TCP_CLOSED]; + next[0] = NAT_NEXT_DROP; } + goto trace0; + } - /* Accounting */ - nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain - (vm, b0), thread_index); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s0, thread_index); + // drop if session expired + u64 sess_timeout_time; + sess_timeout_time = + s0->last_heard + (f64) nat44_session_get_timeout (sm, s0); + if (now >= sess_timeout_time) + { + nat_free_session_data (sm, s0, thread_index, 0); + nat_ed_session_delete (sm, s0, thread_index, 1); + // session is closed, go slow path + next[0] = def_slow; + goto trace0; + } + + b0->flags |= VNET_BUFFER_F_IS_NATED; + + if (nat_6t_flow_match (&s0->i2o, b0, lookup_saddr, lookup_sport, + lookup_daddr, lookup_dport, lookup_protocol, + rx_fib_index0)) + { + f = &s0->i2o; + } + else if (s0->flags & SNAT_SESSION_FLAG_HAIRPINNING && + nat_6t_flow_match (&s0->o2i, b0, lookup_saddr, lookup_sport, + lookup_daddr, lookup_dport, lookup_protocol, + rx_fib_index0)) + { + f = &s0->o2i; + } + else + { + translation_error = NAT_ED_TRNSL_ERR_FLOW_MISMATCH; + nat_free_session_data (sm, s0, thread_index, 0); + nat_ed_session_delete (sm, s0, thread_index, 1); + next[0] = NAT_NEXT_DROP; + goto trace0; + } + + if (NAT_ED_TRNSL_ERR_SUCCESS != + (translation_error = nat_6t_flow_buf_translate ( + sm, b0, ip0, f, proto0, is_output_feature))) + { + nat_free_session_data (sm, s0, thread_index, 0); + nat_ed_session_delete (sm, s0, thread_index, 1); + next[0] = NAT_NEXT_DROP; + goto trace0; + } + + switch (proto0) + { + case NAT_PROTOCOL_TCP: + vlib_increment_simple_counter (&sm->counters.fastpath.in2out_ed.tcp, + thread_index, sw_if_index0, 1); + nat44_set_tcp_session_state_i2o (sm, now, s0, b0, thread_index); + break; + case NAT_PROTOCOL_UDP: + vlib_increment_simple_counter (&sm->counters.fastpath.in2out_ed.udp, + thread_index, sw_if_index0, 1); + break; + case NAT_PROTOCOL_ICMP: + vlib_increment_simple_counter (&sm->counters.fastpath.in2out_ed.icmp, + thread_index, sw_if_index0, 1); + break; + case NAT_PROTOCOL_OTHER: + vlib_increment_simple_counter ( + &sm->counters.fastpath.in2out_ed.other, thread_index, sw_if_index0, + 1); + break; + } - trace0: - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) + /* Accounting */ + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (vm, b0), + thread_index); + /* Per-user LRU list maintenance */ + nat44_session_update_lru (sm, s0, thread_index); + + trace0: + if (PREDICT_FALSE + ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + nat_in2out_ed_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next[0]; + t->is_slow_path = 0; + t->translation_error = translation_error; + t->lookup_skipped = lookup_skipped; + clib_memcpy (&t->search_key, &kv0, sizeof (t->search_key)); + + if (s0) + { + 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 { - nat_in2out_ed_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - t->next_index = next0; - t->is_slow_path = 0; - - if (s0) - t->session_index = s0 - tsm->sessions; - else - t->session_index = ~0; + t->session_index = ~0; } + } - pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next; - /* verify speculative enqueue, maybe switch current next frame */ - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, - to_next, n_left_to_next, - bi0, next0); + if (next[0] == NAT_NEXT_DROP) + { + vlib_increment_simple_counter (&sm->counters.fastpath. + in2out_ed.drops, thread_index, + sw_if_index0, 1); } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); + n_left_from--; + next++; } - vlib_node_increment_counter (vm, stats_node_index, - NAT_IN2OUT_ED_ERROR_IN2OUT_PACKETS, - pkts_processed); - vlib_node_increment_counter (vm, stats_node_index, - NAT_IN2OUT_ED_ERROR_TCP_PACKETS, tcp_packets); - vlib_node_increment_counter (vm, stats_node_index, - NAT_IN2OUT_ED_ERROR_UDP_PACKETS, udp_packets); - vlib_node_increment_counter (vm, stats_node_index, - NAT_IN2OUT_ED_ERROR_ICMP_PACKETS, - icmp_packets); - vlib_node_increment_counter (vm, stats_node_index, - NAT_IN2OUT_ED_ERROR_OTHER_PACKETS, - other_packets); + vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts, + frame->n_vectors); return frame->n_vectors; } @@ -1207,306 +1164,236 @@ 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, iph_offset0 = 0; + nat_protocol_t proto0; + ip4_header_t *ip0; + udp_header_t *udp0; + icmp46_header_t *icmp0; + snat_session_t *s0 = 0; + clib_bihash_kv_16_8_t kv0, value0; + int translation_error = NAT_ED_TRNSL_ERR_SUCCESS; - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + b0 = *b; - while (n_left_from > 0 && n_left_to_next > 0) - { - u32 bi0; - vlib_buffer_t *b0; - u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0, - new_addr0, old_addr0; - u16 old_port0, new_port0; - ip4_header_t *ip0; - udp_header_t *udp0; - tcp_header_t *tcp0; - icmp46_header_t *icmp0; - snat_session_t *s0 = 0; - clib_bihash_kv_16_8_t kv0, value0; - ip_csum_t sum0; - - /* speculatively enqueue b0 to the current next frame */ - bi0 = from[0]; - to_next[0] = bi0; - from += 1; - to_next += 1; - n_left_from -= 1; - n_left_to_next -= 1; - - b0 = vlib_get_buffer (vm, bi0); + if (is_output_feature) + iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length; - if (is_output_feature) - iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length; + next[0] = vnet_buffer2 (b0)->nat.arc_next; - next0 = vnet_buffer2 (b0)->nat.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); + + 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; + } - 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); + udp0 = ip4_next_header (ip0); + icmp0 = (icmp46_header_t *) udp0; + proto0 = ip_proto_to_nat_proto (ip0->protocol); - if (PREDICT_FALSE (ip0->ttl == 1)) + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) + { + s0 = nat44_ed_in2out_slowpath_unknown_proto ( + sm, b0, ip0, rx_fib_index0, thread_index, now, vm, node); + if (!s0) + next[0] = NAT_NEXT_DROP; + + if (NAT_ED_TRNSL_ERR_SUCCESS != + (translation_error = nat_6t_flow_buf_translate ( + sm, b0, ip0, &s0->i2o, proto0, is_output_feature))) { - vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, - ICMP4_time_exceeded_ttl_exceeded_in_transit, - 0); - next0 = NAT_NEXT_ICMP_ERROR; goto trace0; } - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; - proto0 = ip_proto_to_nat_proto (ip0->protocol); + vlib_increment_simple_counter (&sm->counters.slowpath. + in2out_ed.other, thread_index, + sw_if_index0, 1); + goto trace0; + } - if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) + { + next[0] = icmp_in2out_ed_slow_path (sm, b0, ip0, icmp0, sw_if_index0, + rx_fib_index0, node, next[0], + now, thread_index, proto0, &s0); + if (NAT_NEXT_DROP != next[0] && s0 && + NAT_ED_TRNSL_ERR_SUCCESS != + (translation_error = nat_6t_flow_buf_translate ( + sm, b0, ip0, &s0->i2o, proto0, is_output_feature))) { - s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0, - rx_fib_index0, - thread_index, now, - vm, node); - if (!s0) - next0 = NAT_NEXT_DROP; - - other_packets++; goto trace0; } - if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) + vlib_increment_simple_counter (&sm->counters.slowpath. + in2out_ed.icmp, thread_index, + sw_if_index0, 1); + goto trace0; + } + + init_ed_k (&kv0, ip0->src_address, + vnet_buffer (b0)->ip.reass.l4_src_port, ip0->dst_address, + vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, + ip0->protocol); + if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0)) + { + ASSERT (thread_index == ed_value_get_thread_index (&value0)); + s0 = + pool_elt_at_index (tsm->sessions, + ed_value_get_session_index (&value0)); + + if (s0->tcp_closed_timestamp && now >= s0->tcp_closed_timestamp) { - next0 = icmp_in2out_ed_slow_path - (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, - node, next0, now, thread_index, &s0); - icmp_packets++; - goto trace0; + nat_free_session_data (sm, s0, thread_index, 0); + nat_ed_session_delete (sm, s0, thread_index, 1); + s0 = NULL; } + } - 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)) + if (!s0) + { + if (is_output_feature) { - ASSERT (thread_index == ed_value_get_thread_index (&value0)); - s0 = - pool_elt_at_index (tsm->sessions, - ed_value_get_session_index (&value0)); + if (PREDICT_FALSE + (nat44_ed_not_translate_output_feature + (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port, + vnet_buffer (b0)->ip.reass.l4_dst_port, thread_index, + sw_if_index0, vnet_buffer (b0)->sw_if_index[VLIB_TX], + now))) + goto trace0; - if (s0->tcp_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; - } + /* + * Send DHCP packets to the ipv4 stack, or we won't + * be able to use dhcp client on the outside interface + */ + if (PREDICT_FALSE + (proto0 == NAT_PROTOCOL_UDP + && (vnet_buffer (b0)->ip.reass.l4_dst_port == + clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_server)) + && ip0->dst_address.as_u32 == 0xffffffff)) + goto trace0; } - - if (!s0) + else { - if (is_output_feature) - { - if (PREDICT_FALSE - (nat44_ed_not_translate_output_feature - (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port, - vnet_buffer (b0)->ip.reass.l4_dst_port, thread_index, - sw_if_index0, - vnet_buffer (b0)->sw_if_index[VLIB_TX]))) - goto trace0; - - /* - * Send DHCP packets to the ipv4 stack, or we won't - * be able to use dhcp client on the outside interface - */ - if (PREDICT_FALSE - (proto0 == 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; - } - else - { - if (PREDICT_FALSE - (nat44_ed_not_translate - (sm, node, sw_if_index0, ip0, proto0, rx_fib_index0, - thread_index))) - goto trace0; - } + if (PREDICT_FALSE + (nat44_ed_not_translate + (sm, node, sw_if_index0, ip0, proto0, rx_fib_index0, + thread_index))) + goto trace0; + } - next0 = - slow_path_ed (sm, b0, ip0->src_address, ip0->dst_address, - vnet_buffer (b0)->ip.reass.l4_src_port, - vnet_buffer (b0)->ip.reass.l4_dst_port, - ip0->protocol, rx_fib_index0, &s0, node, next0, - thread_index, now); + next[0] = + slow_path_ed (sm, b0, ip0->src_address, ip0->dst_address, + vnet_buffer (b0)->ip.reass.l4_src_port, + vnet_buffer (b0)->ip.reass.l4_dst_port, + ip0->protocol, rx_fib_index0, &s0, node, next[0], + thread_index, now); - if (PREDICT_FALSE (next0 == NAT_NEXT_DROP)) - goto trace0; + if (PREDICT_FALSE (next[0] == NAT_NEXT_DROP)) + goto trace0; - if (PREDICT_FALSE (!s0)) - goto trace0; + if (PREDICT_FALSE (!s0)) + goto trace0; - } + } - b0->flags |= VNET_BUFFER_F_IS_NATED; + b0->flags |= VNET_BUFFER_F_IS_NATED; - if (!is_output_feature) - vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index; + if (NAT_ED_TRNSL_ERR_SUCCESS != + (translation_error = nat_6t_flow_buf_translate ( + sm, b0, ip0, &s0->i2o, proto0, is_output_feature))) + { + nat_free_session_data (sm, s0, thread_index, 0); + nat_ed_session_delete (sm, s0, thread_index, 1); + s0 = NULL; + goto trace0; + } - old_addr0 = ip0->src_address.as_u32; - new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32; - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - src_address); - if (PREDICT_FALSE (is_twice_nat_session (s0))) - sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32, - s0->ext_host_addr.as_u32, ip4_header_t, - dst_address); - ip0->checksum = ip_csum_fold (sum0); + if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) + { + vlib_increment_simple_counter (&sm->counters.slowpath.in2out_ed.tcp, + thread_index, sw_if_index0, 1); + nat44_set_tcp_session_state_i2o (sm, now, s0, b0, thread_index); + } + else + { + vlib_increment_simple_counter (&sm->counters.slowpath.in2out_ed.udp, + thread_index, sw_if_index0, 1); + } - old_port0 = vnet_buffer (b0)->ip.reass.l4_src_port; + /* Accounting */ + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain + (vm, b0), thread_index); + /* Per-user LRU list maintenance */ + nat44_session_update_lru (sm, s0, thread_index); - if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) - { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) - { - new_port0 = udp0->src_port = s0->out2in.port; - sum0 = tcp0->checksum; - sum0 = - ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, dst_address); - sum0 = - ip_csum_update (sum0, old_port0, new_port0, - ip4_header_t, length); - if (PREDICT_FALSE (is_twice_nat_session (s0))) - { - sum0 = - ip_csum_update (sum0, ip0->dst_address.as_u32, - s0->ext_host_addr.as_u32, - ip4_header_t, dst_address); - sum0 = - ip_csum_update (sum0, - vnet_buffer (b0)->ip. - reass.l4_dst_port, s0->ext_host_port, - ip4_header_t, length); - tcp0->dst_port = s0->ext_host_port; - ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; - } - mss_clamping (sm->mss_clamping, tcp0, &sum0); - tcp0->checksum = ip_csum_fold (sum0); - } - tcp_packets++; - if (nat44_set_tcp_session_state_i2o - (sm, now, s0, b0, thread_index)) - goto trace0; - } - else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment - && udp0->checksum) - { - new_port0 = udp0->src_port = s0->out2in.port; - sum0 = udp0->checksum; - sum0 = - ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - sum0 = - ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, - length); - if (PREDICT_FALSE (is_twice_nat_session (s0))) - { - sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32, - s0->ext_host_addr.as_u32, - ip4_header_t, dst_address); - sum0 = - ip_csum_update (sum0, - vnet_buffer (b0)->ip.reass.l4_dst_port, - s0->ext_host_port, ip4_header_t, length); - udp0->dst_port = s0->ext_host_port; - ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; - } - udp0->checksum = ip_csum_fold (sum0); - udp_packets++; - } - else + trace0: + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + nat_in2out_ed_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next[0]; + t->is_slow_path = 1; + t->translation_error = translation_error; + clib_memcpy (&t->search_key, &kv0, sizeof (t->search_key)); + + if (s0) { - if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) - { - new_port0 = udp0->src_port = s0->out2in.port; - if (PREDICT_FALSE (is_twice_nat_session (s0))) - { - udp0->dst_port = s0->ext_host_port; - ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; - } - udp_packets++; - } + t->session_index = s0 - tsm->sessions; + clib_memcpy (&t->i2of, &s0->i2o, sizeof (t->i2of)); + clib_memcpy (&t->o2if, &s0->o2i, sizeof (t->o2if)); + t->translation_via_i2of = 1; } - /* Accounting */ - nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain - (vm, b0), thread_index); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s0, thread_index); - - trace0: - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) + else { - nat_in2out_ed_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - t->next_index = next0; - t->is_slow_path = 1; - - if (s0) - t->session_index = s0 - tsm->sessions; - else - t->session_index = ~0; + t->session_index = ~0; } + } - pkts_processed += next0 == vnet_buffer2 (b0)->nat.arc_next; - - /* verify speculative enqueue, maybe switch current next frame */ - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, - to_next, n_left_to_next, - bi0, next0); + if (next[0] == NAT_NEXT_DROP) + { + vlib_increment_simple_counter (&sm->counters.slowpath. + in2out_ed.drops, thread_index, + sw_if_index0, 1); } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); + n_left_from--; + next++; + b++; } - vlib_node_increment_counter (vm, stats_node_index, - NAT_IN2OUT_ED_ERROR_IN2OUT_PACKETS, - pkts_processed); - vlib_node_increment_counter (vm, stats_node_index, - NAT_IN2OUT_ED_ERROR_TCP_PACKETS, tcp_packets); - vlib_node_increment_counter (vm, stats_node_index, - NAT_IN2OUT_ED_ERROR_UDP_PACKETS, udp_packets); - vlib_node_increment_counter (vm, stats_node_index, - NAT_IN2OUT_ED_ERROR_ICMP_PACKETS, - icmp_packets); - vlib_node_increment_counter (vm, stats_node_index, - NAT_IN2OUT_ED_ERROR_OTHER_PACKETS, - other_packets); + vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts, + frame->n_vectors); + return frame->n_vectors; } @@ -1608,6 +1495,13 @@ 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", @@ -1617,6 +1511,15 @@ 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* */ /*