X-Git-Url: https://gerrit.fd.io/r/gitweb?p=vpp.git;a=blobdiff_plain;f=src%2Fplugins%2Fnat%2Fin2out.c;h=9c8b2c6c5e5232646a5ddb866c2494da012b5966;hp=b0dbbc8fa11d0bfdf27541e63d01459145ae4470;hb=878c646a;hpb=cba6936c45bc3265ae695e8266bdefc65e7a5116 diff --git a/src/plugins/nat/in2out.c b/src/plugins/nat/in2out.c index b0dbbc8fa11..9c8b2c6c5e5 100755 --- a/src/plugins/nat/in2out.c +++ b/src/plugins/nat/in2out.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #include @@ -115,7 +116,13 @@ vlib_node_registration_t snat_hairpin_dst_node; vlib_node_registration_t snat_hairpin_src_node; vlib_node_registration_t nat44_hairpinning_node; vlib_node_registration_t nat44_in2out_reass_node; - +vlib_node_registration_t nat44_ed_in2out_node; +vlib_node_registration_t nat44_ed_in2out_slowpath_node; +vlib_node_registration_t nat44_ed_in2out_output_node; +vlib_node_registration_t nat44_ed_in2out_output_slowpath_node; +vlib_node_registration_t nat44_ed_hairpin_dst_node; +vlib_node_registration_t nat44_ed_hairpin_src_node; +vlib_node_registration_t nat44_ed_hairpinning_node; #define foreach_snat_in2out_error \ _(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \ @@ -127,7 +134,8 @@ _(NO_TRANSLATION, "No translation") \ _(MAX_SESSIONS_EXCEEDED, "Maximum sessions exceeded") \ _(DROP_FRAGMENT, "Drop fragment") \ _(MAX_REASS, "Maximum reassemblies exceeded") \ -_(MAX_FRAG, "Maximum fragments per reassembly exceeded") +_(MAX_FRAG, "Maximum fragments per reassembly exceeded")\ +_(FQ_CONGESTED, "Handoff frame queue congested") typedef enum { #define _(sym,str) SNAT_IN2OUT_ERROR_##sym, @@ -162,7 +170,7 @@ typedef enum { /** * @brief Check if packet should be translated * - * Packets aimed at outside interface and external addresss with active session + * Packets aimed at outside interface and external address with active session * should be translated. * * @param sm NAT main @@ -183,6 +191,7 @@ snat_not_translate_fast (snat_main_t * sm, vlib_node_runtime_t *node, return 0; fib_node_index_t fei = FIB_NODE_INDEX_INVALID; + nat_outside_fib_t *outside_fib; fib_prefix_t pfx = { .fp_proto = FIB_PROTOCOL_IP4, .fp_len = 32, @@ -202,10 +211,20 @@ snat_not_translate_fast (snat_main_t * sm, vlib_node_runtime_t *node, u32 sw_if_index = fib_entry_get_resolving_interface (fei); if (sw_if_index == ~0) { - fei = fib_table_lookup (sm->outside_fib_index, &pfx); - if (FIB_NODE_INDEX_INVALID != fei) - sw_if_index = fib_entry_get_resolving_interface (fei); + vec_foreach (outside_fib, sm->outside_fibs) + { + fei = fib_table_lookup (outside_fib->fib_index, &pfx); + if (FIB_NODE_INDEX_INVALID != fei) + { + sw_if_index = fib_entry_get_resolving_interface (fei); + if (sw_if_index != ~0) + break; + } + } } + if (sw_if_index == ~0) + return 1; + snat_interface_t *i; pool_foreach (i, sm->interfaces, ({ @@ -239,7 +258,7 @@ snat_not_translate (snat_main_t * sm, vlib_node_runtime_t *node, &value0)) { /* or is static mappings */ - if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0)) + if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0)) return 0; } else @@ -252,6 +271,83 @@ snat_not_translate (snat_main_t * sm, vlib_node_runtime_t *node, rx_fib_index0); } +static inline int +nat_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip0, + u32 proto0, u16 src_port, u16 dst_port, + u32 thread_index, u32 sw_if_index) +{ + snat_session_key_t key0; + clib_bihash_kv_8_8_t kv0, value0; + snat_interface_t *i; + + /* src NAT check */ + key0.addr = ip0->src_address; + key0.port = src_port; + key0.protocol = proto0; + key0.fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index); + kv0.key = key0.as_u64; + + if (!clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].out2in, &kv0, + &value0)) + return 1; + + /* dst NAT check */ + key0.addr = ip0->dst_address; + key0.port = dst_port; + key0.protocol = proto0; + kv0.key = key0.as_u64; + if (!clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].in2out, &kv0, + &value0)) + { + /* hairpinning */ + pool_foreach (i, sm->output_feature_interfaces, + ({ + if ((nat_interface_is_inside(i)) && (sw_if_index == i->sw_if_index)) + return 0; + })); + return 1; + } + + return 0; +} + +int +nat44_i2o_is_idle_session_cb (clib_bihash_kv_8_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; + snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data, + ctx->thread_index); + clib_bihash_kv_8_8_t s_kv; + + 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) + { + s_kv.key = s->out2in.as_u64; + if (clib_bihash_add_del_8_8 (&tsm->out2in, &s_kv, 0)) + nat_log_warn ("out2in key del failed"); + + snat_ipfix_logging_nat44_ses_delete(s->in2out.addr.as_u32, + s->out2in.addr.as_u32, + s->in2out.protocol, + s->in2out.port, + s->out2in.port, + s->in2out.fib_index); + + if (!snat_is_session_static (s)) + snat_free_outside_address_and_port (sm->addresses, ctx->thread_index, + &s->out2in); + + nat44_delete_session (sm, s, ctx->thread_index); + return 1; + } + + return 0; +} + static u32 slow_path (snat_main_t *sm, vlib_buffer_t *b0, ip4_header_t * ip0, u32 rx_fib_index0, @@ -259,50 +355,39 @@ static u32 slow_path (snat_main_t *sm, vlib_buffer_t *b0, snat_session_t ** sessionp, vlib_node_runtime_t * node, u32 next0, - u32 thread_index) + u32 thread_index, + f64 now) { snat_user_t *u; snat_session_t *s; clib_bihash_kv_8_8_t kv0; snat_session_key_t key1; u32 address_index = ~0; - u32 outside_fib_index; - uword * p; udp_header_t * udp0 = ip4_next_header (ip0); + u8 is_sm = 0; + nat_outside_fib_t *outside_fib; + fib_node_index_t fei = FIB_NODE_INDEX_INVALID; + fib_prefix_t pfx = { + .fp_proto = FIB_PROTOCOL_IP4, + .fp_len = 32, + .fp_addr = { + .ip4.as_u32 = ip0->dst_address.as_u32, + }, + }; + nat44_is_idle_session_ctx_t ctx0; if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index))) { b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_SESSIONS_EXCEEDED]; + nat_ipfix_logging_max_sessions(sm->max_translations); + nat_log_notice ("maximum sessions exceeded"); return SNAT_IN2OUT_NEXT_DROP; } - p = hash_get (sm->ip4_main->fib_index_by_table_id, sm->outside_vrf_id); - if (! p) - { - b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_OUTSIDE_FIB]; - return SNAT_IN2OUT_NEXT_DROP; - } - outside_fib_index = p[0]; - key1.protocol = key0->protocol; - u = nat_user_get_or_create (sm, &ip0->src_address, rx_fib_index0, - thread_index); - if (!u) - { - clib_warning ("create NAT user failed"); - return SNAT_IN2OUT_NEXT_DROP; - } - - s = nat_session_alloc_or_recycle (sm, u, thread_index); - if (!s) - { - clib_warning ("create NAT session failed"); - return SNAT_IN2OUT_NEXT_DROP; - } - /* First try to match static mapping by local address and port */ - if (snat_static_mapping_match (sm, *key0, &key1, 0, 0, 0)) + if (snat_static_mapping_match (sm, *key0, &key1, 0, 0, 0, 0)) { /* Try to create dynamic translation */ if (snat_alloc_outside_address_and_port (sm->addresses, rx_fib_index0, @@ -314,36 +399,78 @@ static u32 slow_path (snat_main_t *sm, vlib_buffer_t *b0, b0->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS]; return SNAT_IN2OUT_NEXT_DROP; } - u->nsessions++; } else + is_sm = 1; + + u = nat_user_get_or_create (sm, &ip0->src_address, rx_fib_index0, + thread_index); + if (!u) + { + nat_log_warn ("create NAT user failed"); + return SNAT_IN2OUT_NEXT_DROP; + } + + s = nat_session_alloc_or_recycle (sm, u, thread_index); + if (!s) { - u->nstaticsessions++; - s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; + nat44_delete_user_with_no_session (sm, u, thread_index); + nat_log_warn ("create NAT session failed"); + return SNAT_IN2OUT_NEXT_DROP; } + if (is_sm) + s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; + user_session_increment (sm, u, is_sm); s->outside_address_index = address_index; s->in2out = *key0; s->out2in = key1; s->out2in.protocol = key0->protocol; - s->out2in.fib_index = outside_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: + vec_foreach (outside_fib, sm->outside_fibs) + { + fei = fib_table_lookup (outside_fib->fib_index, &pfx); + if (FIB_NODE_INDEX_INVALID != fei) + { + if (fib_entry_get_resolving_interface (fei) != ~0) + { + s->out2in.fib_index = outside_fib->fib_index; + break; + } + } + } + break; + } s->ext_host_addr.as_u32 = ip0->dst_address.as_u32; s->ext_host_port = udp0->dst_port; *sessionp = s; /* Add to translation hashes */ + ctx0.now = now; + ctx0.thread_index = thread_index; kv0.key = s->in2out.as_u64; kv0.value = s - sm->per_thread_data[thread_index].sessions; - if (clib_bihash_add_del_8_8 (&sm->per_thread_data[thread_index].in2out, &kv0, - 1 /* is_add */)) - clib_warning ("in2out key add failed"); + if (clib_bihash_add_or_overwrite_stale_8_8 ( + &sm->per_thread_data[thread_index].in2out, &kv0, + nat44_i2o_is_idle_session_cb, &ctx0)) + nat_log_notice ("in2out key add failed"); kv0.key = s->out2in.as_u64; kv0.value = s - sm->per_thread_data[thread_index].sessions; - if (clib_bihash_add_del_8_8 (&sm->per_thread_data[thread_index].out2in, &kv0, - 1 /* is_add */)) - clib_warning ("out2in key add failed"); + if (clib_bihash_add_or_overwrite_stale_8_8 ( + &sm->per_thread_data[thread_index].out2in, &kv0, + nat44_o2i_is_idle_session_cb, &ctx0)) + nat_log_notice ("out2in key add failed"); /* log NAT event */ snat_ipfix_logging_nat44_ses_create(s->in2out.addr.as_u32, @@ -448,12 +575,23 @@ u32 icmp_match_in2out_slow(snat_main_t *sm, vlib_node_runtime_t *node, if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].in2out, &kv0, &value0)) { - if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0, ip0, - IP_PROTOCOL_ICMP, rx_fib_index0, thread_index) && - vnet_buffer(b0)->sw_if_index[VLIB_TX] == ~0)) + if (vnet_buffer(b0)->sw_if_index[VLIB_TX] != ~0) { - dont_translate = 1; - goto out; + if (PREDICT_FALSE(nat_not_translate_output_feature(sm, ip0, + key0.protocol, key0.port, key0.port, thread_index, sw_if_index0))) + { + dont_translate = 1; + goto out; + } + } + else + { + if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0, + ip0, SNAT_PROTOCOL_ICMP, rx_fib_index0, thread_index))) + { + dont_translate = 1; + goto out; + } } if (PREDICT_FALSE(icmp_is_error_message (icmp0))) @@ -463,8 +601,8 @@ u32 icmp_match_in2out_slow(snat_main_t *sm, vlib_node_runtime_t *node, goto out; } - next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0, - &s0, node, next0, thread_index); + next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0, &s0, node, next0, + thread_index, vlib_time_now (sm->vlib_main)); if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP)) goto out; @@ -536,7 +674,7 @@ u32 icmp_match_in2out_fast(snat_main_t *sm, vlib_node_runtime_t *node, } key0.fib_index = rx_fib_index0; - if (snat_static_mapping_match(sm, key0, &sm0, 0, &is_addr_only, 0)) + if (snat_static_mapping_match(sm, key0, &sm0, 0, &is_addr_only, 0, 0)) { if (PREDICT_FALSE(snat_not_translate_fast(sm, node, sw_if_index0, ip0, IP_PROTOCOL_ICMP, rx_fib_index0))) @@ -626,6 +764,9 @@ static inline u32 icmp_in2out (snat_main_t *sm, src_address /* changed member */); ip0->checksum = ip_csum_fold (sum0); + if (icmp0->checksum == 0) + icmp0->checksum = 0xffff; + if (!icmp_is_error_message (icmp0)) { new_id0 = sm0.port; @@ -716,7 +857,8 @@ snat_hairpinning (snat_main_t *sm, ip4_header_t * ip0, udp_header_t * udp0, tcp_header_t * tcp0, - u32 proto0) + u32 proto0, + int is_ed) { snat_session_key_t key0, sm0; snat_session_t * s0; @@ -724,6 +866,7 @@ snat_hairpinning (snat_main_t *sm, ip_csum_t sum0; u32 new_dst_addr0 = 0, old_dst_addr0, ti = 0, si; u16 new_dst_port0, old_dst_port0; + int rv; key0.addr = ip0->dst_address; key0.port = udp0->dst_port; @@ -732,7 +875,7 @@ snat_hairpinning (snat_main_t *sm, kv0.key = key0.as_u64; /* Check if destination is static mappings */ - if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0)) + if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0)) { new_dst_addr0 = sm0.addr.as_u32; new_dst_port0 = sm0.port; @@ -746,15 +889,29 @@ snat_hairpinning (snat_main_t *sm, else ti = sm->num_workers; - if (!clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0, &value0)) + if (is_ed) + { + clib_bihash_kv_16_8_t ed_kv, ed_value; + make_ed_kv (&ed_kv, &ip0->dst_address, &ip0->src_address, + ip0->protocol, sm->outside_fib_index, udp0->dst_port, + udp0->src_port); + rv = clib_bihash_search_16_8 (&sm->per_thread_data[ti].out2in_ed, + &ed_kv, &ed_value); + si = ed_value.value; + } + else { + rv = clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0, + &value0); si = value0.value; - - s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si); - new_dst_addr0 = s0->in2out.addr.as_u32; - new_dst_port0 = s0->in2out.port; - vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; } + if (rv) + return 0; + + s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si); + new_dst_addr0 = s0->in2out.addr.as_u32; + new_dst_port0 = s0->in2out.port; + vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; } /* Destination is behind the same NAT, use internal address and port */ @@ -805,13 +962,15 @@ static inline void snat_icmp_hairpinning (snat_main_t *sm, vlib_buffer_t * b0, ip4_header_t * ip0, - icmp46_header_t * icmp0) + icmp46_header_t * icmp0, + int is_ed) { snat_session_key_t key0, sm0; clib_bihash_kv_8_8_t kv0, value0; u32 new_dst_addr0 = 0, old_dst_addr0, si, ti = 0; ip_csum_t sum0; snat_session_t *s0; + int rv; if (!icmp_is_error_message (icmp0)) { @@ -829,11 +988,25 @@ snat_icmp_hairpinning (snat_main_t *sm, ti = sm->num_workers; /* Check if destination is in active sessions */ - if (clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0, - &value0)) + if (is_ed) + { + clib_bihash_kv_16_8_t ed_kv, ed_value; + make_ed_kv (&ed_kv, &ip0->dst_address, &ip0->src_address, + IP_PROTOCOL_ICMP, sm->outside_fib_index, icmp_id0, 0); + rv = clib_bihash_search_16_8 (&sm->per_thread_data[ti].out2in_ed, + &ed_kv, &ed_value); + si = ed_value.value; + } + else + { + rv = clib_bihash_search_8_8 (&sm->per_thread_data[ti].out2in, &kv0, + &value0); + si = value0.value; + } + if (rv) { /* or static mappings */ - if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0)) + if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0)) { new_dst_addr0 = sm0.addr.as_u32; vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index; @@ -841,8 +1014,6 @@ snat_icmp_hairpinning (snat_main_t *sm, } else { - si = value0.value; - s0 = pool_elt_at_index (sm->per_thread_data[ti].sessions, si); new_dst_addr0 = s0->in2out.addr.as_u32; vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; @@ -886,417 +1057,86 @@ static inline u32 icmp_in2out_slow_path (snat_main_t *sm, { /* Hairpinning */ if (vnet_buffer(b0)->sw_if_index[VLIB_TX] == 0) - snat_icmp_hairpinning(sm, b0, ip0, icmp0); + snat_icmp_hairpinning(sm, b0, ip0, icmp0, sm->endpoint_dependent); /* Accounting */ - s0->last_heard = now; - s0->total_pkts++; - s0->total_bytes += vlib_buffer_length_in_chain (sm->vlib_main, b0); + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (sm->vlib_main, b0)); /* Per-user LRU list maintenance */ - clib_dlist_remove (sm->per_thread_data[thread_index].list_pool, - s0->per_user_index); - clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool, - s0->per_user_list_head_index, - s0->per_user_index); + nat44_session_update_lru (sm, s0, thread_index); } return next0; } + static inline void -snat_hairpinning_unknown_proto (snat_main_t *sm, - vlib_buffer_t * b, - ip4_header_t * ip) +nat_hairpinning_sm_unknown_proto (snat_main_t * sm, + vlib_buffer_t * b, + ip4_header_t * ip) { - u32 old_addr, new_addr = 0, ti = 0; clib_bihash_kv_8_8_t kv, value; - clib_bihash_kv_16_8_t s_kv, s_value; - nat_ed_ses_key_t key; - snat_session_key_t m_key; snat_static_mapping_t *m; + u32 old_addr, new_addr; ip_csum_t sum; - snat_session_t *s; - old_addr = ip->dst_address.as_u32; - key.l_addr.as_u32 = ip->dst_address.as_u32; - key.r_addr.as_u32 = ip->src_address.as_u32; - key.fib_index = sm->outside_fib_index; - key.proto = ip->protocol; - key.r_port = 0; - key.l_port = 0; - s_kv.key[0] = key.as_u64[0]; - s_kv.key[1] = key.as_u64[1]; - if (clib_bihash_search_16_8 (&sm->out2in_ed, &s_kv, &s_value)) - { - m_key.addr = ip->dst_address; - m_key.fib_index = sm->outside_fib_index; - m_key.port = 0; - m_key.protocol = 0; - kv.key = m_key.as_u64; - if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) - return; + make_sm_kv (&kv, &ip->dst_address, 0, 0, 0); + if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) + return; - m = pool_elt_at_index (sm->static_mappings, value.value); - if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0) - vnet_buffer(b)->sw_if_index[VLIB_TX] = m->fib_index; - new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32; - } - else - { - if (sm->num_workers > 1) - ti = sm->worker_out2in_cb (ip, sm->outside_fib_index); - else - ti = sm->num_workers; + m = pool_elt_at_index (sm->static_mappings, value.value); - s = pool_elt_at_index (sm->per_thread_data[ti].sessions, s_value.value); - if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0) - vnet_buffer(b)->sw_if_index[VLIB_TX] = s->in2out.fib_index; - new_addr = ip->dst_address.as_u32 = s->in2out.addr.as_u32; - } + old_addr = ip->dst_address.as_u32; + new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32; sum = ip->checksum; sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address); ip->checksum = ip_csum_fold (sum); + + if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0) + vnet_buffer(b)->sw_if_index[VLIB_TX] = m->fib_index; } -static snat_session_t * -snat_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) +static int +nat_in2out_sm_unknown_proto (snat_main_t *sm, + vlib_buffer_t * b, + ip4_header_t * ip, + u32 rx_fib_index) { clib_bihash_kv_8_8_t kv, value; - clib_bihash_kv_16_8_t s_kv, s_value; snat_static_mapping_t *m; snat_session_key_t m_key; - u32 old_addr, new_addr = 0; + u32 old_addr, new_addr; ip_csum_t sum; - snat_user_t *u; - dlist_elt_t *head, *elt; - snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - u32 elt_index, head_index, ses_index; - snat_session_t * s; - nat_ed_ses_key_t key; - u32 address_index = ~0; - int i; - u8 is_sm = 0; - - old_addr = ip->src_address.as_u32; - - key.l_addr = ip->src_address; - key.r_addr = ip->dst_address; - key.fib_index = rx_fib_index; - key.proto = ip->protocol; - key.l_port = 0; - key.l_port = 0; - s_kv.key[0] = key.as_u64[0]; - s_kv.key[1] = key.as_u64[1]; - - if (!clib_bihash_search_16_8 (&sm->in2out_ed, &s_kv, &s_value)) - { - s = pool_elt_at_index (tsm->sessions, s_value.value); - new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32; - } - else - { - if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index))) - { - b->error = node->errors[SNAT_IN2OUT_ERROR_MAX_SESSIONS_EXCEEDED]; - return 0; - } - - u = nat_user_get_or_create (sm, &ip->src_address, rx_fib_index, - thread_index); - if (!u) - { - clib_warning ("create NAT user failed"); - return 0; - } - - m_key.addr = ip->src_address; - m_key.port = 0; - m_key.protocol = 0; - m_key.fib_index = rx_fib_index; - kv.key = m_key.as_u64; - - /* Try to find static mapping first */ - if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value)) - { - m = pool_elt_at_index (sm->static_mappings, value.value); - new_addr = ip->src_address.as_u32 = m->external_addr.as_u32; - is_sm = 1; - goto create_ses; - } - /* Fallback to 3-tuple key */ - else - { - /* Choose same out address as for TCP/UDP session to same destination */ - if (!clib_bihash_search_8_8 (&tsm->user_hash, &kv, &value)) - { - head_index = u->sessions_per_user_list_head_index; - head = pool_elt_at_index (tsm->list_pool, head_index); - elt_index = head->next; - elt = pool_elt_at_index (tsm->list_pool, elt_index); - ses_index = elt->value; - while (ses_index != ~0) - { - s = pool_elt_at_index (tsm->sessions, ses_index); - elt_index = elt->next; - elt = pool_elt_at_index (tsm->list_pool, elt_index); - ses_index = elt->value; - - if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32) - { - new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32; - address_index = s->outside_address_index; - - key.fib_index = sm->outside_fib_index; - key.l_addr.as_u32 = new_addr; - s_kv.key[0] = key.as_u64[0]; - s_kv.key[1] = key.as_u64[1]; - if (clib_bihash_search_16_8 (&sm->out2in_ed, &s_kv, &s_value)) - break; - - goto create_ses; - } - } - } - key.fib_index = sm->outside_fib_index; - for (i = 0; i < vec_len (sm->addresses); i++) - { - key.l_addr.as_u32 = sm->addresses[i].addr.as_u32; - s_kv.key[0] = key.as_u64[0]; - s_kv.key[1] = key.as_u64[1]; - if (clib_bihash_search_16_8 (&sm->out2in_ed, &s_kv, &s_value)) - { - new_addr = ip->src_address.as_u32 = key.l_addr.as_u32; - address_index = i; - goto create_ses; - } - } - return 0; - } - -create_ses: - s = nat_session_alloc_or_recycle (sm, u, thread_index); - if (!s) - { - clib_warning ("create NAT session failed"); - return 0; - } - s->ext_host_addr.as_u32 = ip->dst_address.as_u32; - s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO; - s->outside_address_index = address_index; - s->out2in.addr.as_u32 = new_addr; - s->out2in.fib_index = sm->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) - { - u->nstaticsessions++; - s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; - } - else - { - u->nsessions++; - } + m_key.addr = ip->src_address; + m_key.port = 0; + m_key.protocol = 0; + m_key.fib_index = rx_fib_index; + kv.key = m_key.as_u64; + if (clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value)) + return 1; - /* Add to lookup tables */ - key.l_addr.as_u32 = old_addr; - key.r_addr = ip->dst_address; - key.proto = ip->protocol; - key.fib_index = rx_fib_index; - s_kv.key[0] = key.as_u64[0]; - s_kv.key[1] = key.as_u64[1]; - s_kv.value = s - tsm->sessions; - if (clib_bihash_add_del_16_8 (&sm->in2out_ed, &s_kv, 1)) - clib_warning ("in2out key add failed"); - - key.l_addr.as_u32 = new_addr; - key.fib_index = sm->outside_fib_index; - s_kv.key[0] = key.as_u64[0]; - s_kv.key[1] = key.as_u64[1]; - if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &s_kv, 1)) - clib_warning ("out2in key add failed"); - } + m = pool_elt_at_index (sm->static_mappings, value.value); - /* Update IP checksum */ + old_addr = ip->src_address.as_u32; + new_addr = ip->src_address.as_u32 = m->external_addr.as_u32; sum = ip->checksum; sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, src_address); ip->checksum = ip_csum_fold (sum); - /* Accounting */ - s->last_heard = now; - s->total_pkts++; - s->total_bytes += vlib_buffer_length_in_chain (vm, b); - /* Per-user LRU list maintenance */ - clib_dlist_remove (tsm->list_pool, s->per_user_index); - clib_dlist_addtail (tsm->list_pool, s->per_user_list_head_index, - s->per_user_index); /* Hairpinning */ if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0) - snat_hairpinning_unknown_proto(sm, b, ip); - - if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0) - vnet_buffer(b)->sw_if_index[VLIB_TX] = sm->outside_fib_index; + { + vnet_buffer(b)->sw_if_index[VLIB_TX] = m->fib_index; + nat_hairpinning_sm_unknown_proto (sm, b, ip); + } - return s; + return 0; } -static snat_session_t * -snat_in2out_lb (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) -{ - nat_ed_ses_key_t key; - clib_bihash_kv_16_8_t s_kv, s_value; - udp_header_t *udp = ip4_next_header (ip); - tcp_header_t *tcp = (tcp_header_t *) udp; - snat_session_t *s = 0; - snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - u32 old_addr, new_addr; - u16 new_port, old_port; - ip_csum_t sum; - u32 proto = ip_proto_to_snat_proto (ip->protocol); - snat_session_key_t e_key, l_key; - snat_user_t *u; - - old_addr = ip->src_address.as_u32; - - key.l_addr = ip->src_address; - key.r_addr = ip->dst_address; - key.fib_index = rx_fib_index; - key.proto = ip->protocol; - key.r_port = udp->dst_port; - key.l_port = udp->src_port; - s_kv.key[0] = key.as_u64[0]; - s_kv.key[1] = key.as_u64[1]; - - if (!clib_bihash_search_16_8 (&sm->in2out_ed, &s_kv, &s_value)) - { - s = pool_elt_at_index (tsm->sessions, s_value.value); - } - else - { - if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index))) - { - b->error = node->errors[SNAT_IN2OUT_ERROR_MAX_SESSIONS_EXCEEDED]; - return 0; - } - - l_key.addr = ip->src_address; - l_key.port = udp->src_port; - l_key.protocol = proto; - l_key.fib_index = rx_fib_index; - if (snat_static_mapping_match(sm, l_key, &e_key, 0, 0, 0)) - return 0; - - u = nat_user_get_or_create (sm, &ip->src_address, rx_fib_index, - thread_index); - if (!u) - { - clib_warning ("create NAT user failed"); - return 0; - } - - s = nat_session_alloc_or_recycle (sm, u, thread_index); - if (!s) - { - clib_warning ("create NAT session failed"); - return 0; - } - - s->ext_host_addr.as_u32 = ip->dst_address.as_u32; - s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; - s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING; - s->outside_address_index = ~0; - s->in2out = l_key; - s->out2in = e_key; - u->nstaticsessions++; - - /* Add to lookup tables */ - s_kv.value = s - tsm->sessions; - if (clib_bihash_add_del_16_8 (&sm->in2out_ed, &s_kv, 1)) - clib_warning ("in2out-ed key add failed"); - - key.l_addr = e_key.addr; - key.fib_index = e_key.fib_index; - key.l_port = e_key.port; - s_kv.key[0] = key.as_u64[0]; - s_kv.key[1] = key.as_u64[1]; - if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &s_kv, 1)) - clib_warning ("out2in-ed key add failed"); - } - - new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32; - - /* Update IP checksum */ - sum = ip->checksum; - sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, src_address); - if (is_twice_nat_session (s)) - sum = ip_csum_update (sum, ip->dst_address.as_u32, - s->ext_host_addr.as_u32, ip4_header_t, dst_address); - ip->checksum = ip_csum_fold (sum); - - if (PREDICT_TRUE(proto == SNAT_PROTOCOL_TCP)) - { - old_port = tcp->src_port; - tcp->src_port = s->out2in.port; - new_port = tcp->src_port; - - sum = tcp->checksum; - sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, src_address); - sum = ip_csum_update (sum, old_port, new_port, ip4_header_t, length); - if (is_twice_nat_session (s)) - { - sum = ip_csum_update (sum, ip->dst_address.as_u32, - s->ext_host_addr.as_u32, ip4_header_t, - dst_address); - sum = ip_csum_update (sum, tcp->dst_port, s->ext_host_port, - ip4_header_t, length); - tcp->dst_port = s->ext_host_port; - ip->dst_address.as_u32 = s->ext_host_addr.as_u32; - } - tcp->checksum = ip_csum_fold(sum); - } - else - { - udp->src_port = s->out2in.port; - if (is_twice_nat_session (s)) - { - udp->dst_port = s->ext_host_port; - ip->dst_address.as_u32 = s->ext_host_addr.as_u32; - } - udp->checksum = 0; - } - - if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0) - vnet_buffer(b)->sw_if_index[VLIB_TX] = sm->outside_fib_index; - - /* Accounting */ - s->last_heard = now; - s->total_pkts++; - s->total_bytes += vlib_buffer_length_in_chain (vm, b); - /* Per-user LRU list maintenance */ - clib_dlist_remove (tsm->list_pool, s->per_user_index); - clib_dlist_addtail (tsm->list_pool, s->per_user_list_head_index, - s->per_user_index); - return s; -} - -static inline uword -snat_in2out_node_fn_inline (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame, int is_slow_path, - int is_output_feature) +static inline uword +snat_in2out_node_fn_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, int is_slow_path, + int is_output_feature) { u32 n_left_from, * from, * to_next; snat_in2out_next_t next_index; @@ -1304,7 +1144,7 @@ snat_in2out_node_fn_inline (vlib_main_t * vm, snat_main_t * sm = &snat_main; f64 now = vlib_time_now (vm); u32 stats_node_index; - u32 thread_index = vlib_get_thread_index (); + u32 thread_index = vm->thread_index; stats_node_index = is_slow_path ? snat_in2out_slowpath_node.index : snat_in2out_node.index; @@ -1398,10 +1238,11 @@ snat_in2out_node_fn_inline (vlib_main_t * vm, { if (PREDICT_FALSE (proto0 == ~0)) { - s0 = snat_in2out_unknown_proto (sm, b0, ip0, rx_fib_index0, - thread_index, now, vm, node); - if (!s0) - next0 = SNAT_IN2OUT_NEXT_DROP; + if (nat_in2out_sm_unknown_proto (sm, b0, ip0, rx_fib_index0)) + { + next0 = SNAT_IN2OUT_NEXT_DROP; + b0->error = node->errors[SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL]; + } goto trace00; } @@ -1440,12 +1281,21 @@ snat_in2out_node_fn_inline (vlib_main_t * vm, { if (is_slow_path) { - if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0, - ip0, proto0, rx_fib_index0, thread_index)) && !is_output_feature) - goto trace00; + if (is_output_feature) + { + if (PREDICT_FALSE(nat_not_translate_output_feature(sm, + ip0, proto0, udp0->src_port, udp0->dst_port, thread_index, sw_if_index0))) + goto trace00; + } + else + { + if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0, + ip0, proto0, rx_fib_index0, thread_index))) + goto trace00; + } next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0, - &s0, node, next0, thread_index); + &s0, node, next0, thread_index, now); if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP)) goto trace00; } @@ -1456,30 +1306,8 @@ snat_in2out_node_fn_inline (vlib_main_t * vm, } } else - { - if (PREDICT_FALSE (value0.value == ~0ULL)) - { - if (is_slow_path) - { - s0 = snat_in2out_lb(sm, b0, ip0, rx_fib_index0, - thread_index, now, vm, node); - if (!s0) - next0 = SNAT_IN2OUT_NEXT_DROP; - goto trace00; - } - else - { - next0 = SNAT_IN2OUT_NEXT_SLOW_PATH; - goto trace00; - } - } - else - { - s0 = pool_elt_at_index ( - sm->per_thread_data[thread_index].sessions, - value0.value); - } - } + s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions, + value0.value); b0->flags |= VNET_BUFFER_F_IS_NATED; @@ -1518,15 +1346,10 @@ snat_in2out_node_fn_inline (vlib_main_t * vm, } /* Accounting */ - s0->last_heard = now; - s0->total_pkts++; - s0->total_bytes += vlib_buffer_length_in_chain (vm, b0); + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (vm, b0)); /* Per-user LRU list maintenance */ - clib_dlist_remove (sm->per_thread_data[thread_index].list_pool, - s0->per_user_index); - clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool, - s0->per_user_list_head_index, - s0->per_user_index); + nat44_session_update_lru (sm, s0, thread_index); trace00: if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) @@ -1575,10 +1398,11 @@ snat_in2out_node_fn_inline (vlib_main_t * vm, { if (PREDICT_FALSE (proto1 == ~0)) { - s1 = snat_in2out_unknown_proto (sm, b1, ip1, rx_fib_index1, - thread_index, now, vm, node); - if (!s1) - next1 = SNAT_IN2OUT_NEXT_DROP; + if (nat_in2out_sm_unknown_proto (sm, b1, ip1, rx_fib_index1)) + { + next1 = SNAT_IN2OUT_NEXT_DROP; + b1->error = node->errors[SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL]; + } goto trace01; } @@ -1605,8 +1429,6 @@ snat_in2out_node_fn_inline (vlib_main_t * vm, } } - b1->flags |= VNET_BUFFER_F_IS_NATED; - key1.addr = ip1->src_address; key1.port = udp1->src_port; key1.protocol = proto1; @@ -1619,12 +1441,21 @@ snat_in2out_node_fn_inline (vlib_main_t * vm, { if (is_slow_path) { - if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index1, - ip1, proto1, rx_fib_index1, thread_index)) && !is_output_feature) - goto trace01; + if (is_output_feature) + { + if (PREDICT_FALSE(nat_not_translate_output_feature(sm, + ip1, proto1, udp1->src_port, udp1->dst_port, thread_index, sw_if_index1))) + goto trace01; + } + else + { + if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index1, + ip1, proto1, rx_fib_index1, thread_index))) + goto trace01; + } next1 = slow_path (sm, b1, ip1, rx_fib_index1, &key1, - &s1, node, next1, thread_index); + &s1, node, next1, thread_index, now); if (PREDICT_FALSE (next1 == SNAT_IN2OUT_NEXT_DROP)) goto trace01; } @@ -1635,30 +1466,10 @@ snat_in2out_node_fn_inline (vlib_main_t * vm, } } else - { - if (PREDICT_FALSE (value1.value == ~0ULL)) - { - if (is_slow_path) - { - s1 = snat_in2out_lb(sm, b1, ip1, rx_fib_index1, - thread_index, now, vm, node); - if (!s1) - next1 = SNAT_IN2OUT_NEXT_DROP; - goto trace01; - } - else - { - next1 = SNAT_IN2OUT_NEXT_SLOW_PATH; - goto trace01; - } - } - else - { - s1 = pool_elt_at_index ( - sm->per_thread_data[thread_index].sessions, - value1.value); - } - } + s1 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions, + value1.value); + + b1->flags |= VNET_BUFFER_F_IS_NATED; old_addr1 = ip1->src_address.as_u32; ip1->src_address = s1->out2in.addr; @@ -1695,15 +1506,10 @@ snat_in2out_node_fn_inline (vlib_main_t * vm, } /* Accounting */ - s1->last_heard = now; - s1->total_pkts++; - s1->total_bytes += vlib_buffer_length_in_chain (vm, b1); + nat44_session_update_counters (s1, now, + vlib_buffer_length_in_chain (vm, b1)); /* Per-user LRU list maintenance */ - clib_dlist_remove (sm->per_thread_data[thread_index].list_pool, - s1->per_user_index); - clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool, - s1->per_user_list_head_index, - s1->per_user_index); + nat44_session_update_lru (sm, s1, thread_index); trace01: if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) @@ -1788,10 +1594,11 @@ snat_in2out_node_fn_inline (vlib_main_t * vm, { if (PREDICT_FALSE (proto0 == ~0)) { - s0 = snat_in2out_unknown_proto (sm, b0, ip0, rx_fib_index0, - thread_index, now, vm, node); - if (!s0) - next0 = SNAT_IN2OUT_NEXT_DROP; + if (nat_in2out_sm_unknown_proto (sm, b0, ip0, rx_fib_index0)) + { + next0 = SNAT_IN2OUT_NEXT_DROP; + b0->error = node->errors[SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL]; + } goto trace0; } @@ -1830,12 +1637,21 @@ snat_in2out_node_fn_inline (vlib_main_t * vm, { if (is_slow_path) { - if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0, - ip0, proto0, rx_fib_index0, thread_index)) && !is_output_feature) - goto trace0; + if (is_output_feature) + { + if (PREDICT_FALSE(nat_not_translate_output_feature(sm, + ip0, proto0, udp0->src_port, udp0->dst_port, thread_index, sw_if_index0))) + goto trace0; + } + else + { + if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0, + ip0, proto0, rx_fib_index0, thread_index))) + goto trace0; + } next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0, - &s0, node, next0, thread_index); + &s0, node, next0, thread_index, now); if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP)) goto trace0; @@ -1847,30 +1663,8 @@ snat_in2out_node_fn_inline (vlib_main_t * vm, } } else - { - if (PREDICT_FALSE (value0.value == ~0ULL)) - { - if (is_slow_path) - { - s0 = snat_in2out_lb(sm, b0, ip0, rx_fib_index0, - thread_index, now, vm, node); - if (!s0) - next0 = SNAT_IN2OUT_NEXT_DROP; - goto trace0; - } - else - { - next0 = SNAT_IN2OUT_NEXT_SLOW_PATH; - goto trace0; - } - } - else - { - s0 = pool_elt_at_index ( - sm->per_thread_data[thread_index].sessions, - value0.value); - } - } + s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions, + value0.value); b0->flags |= VNET_BUFFER_F_IS_NATED; @@ -1909,15 +1703,10 @@ snat_in2out_node_fn_inline (vlib_main_t * vm, } /* Accounting */ - s0->last_heard = now; - s0->total_pkts++; - s0->total_bytes += vlib_buffer_length_in_chain (vm, b0); + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (vm, b0)); /* Per-user LRU list maintenance */ - clib_dlist_remove (sm->per_thread_data[thread_index].list_pool, - s0->per_user_index); - clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool, - s0->per_user_list_head_index, - s0->per_user_index); + nat44_session_update_lru (sm, s0, thread_index); trace0: if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) @@ -2091,12 +1880,13 @@ VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_output_slowpath_node, extern vnet_feature_arc_registration_t vnet_feat_arc_ip4_local; -static uword -nat44_hairpinning_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) +static inline uword +nat44_hairpinning_fn_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, + int is_ed) { - u32 n_left_from, * from, * to_next; + u32 n_left_from, * from, * to_next, stats_node_index; snat_in2out_next_t next_index; u32 pkts_processed = 0; snat_main_t * sm = &snat_main; @@ -2104,6 +1894,8 @@ nat44_hairpinning_fn (vlib_main_t * vm, u8 arc_index = vnet_feat_arc_ip4_local.feature_arc_index; vnet_feature_config_main_t *cm = &fm->feature_config_mains[arc_index]; + stats_node_index = is_ed ? nat44_ed_hairpinning_node.index : + nat44_hairpinning_node.index; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; next_index = node->cached_next_index; @@ -2143,7 +1935,7 @@ nat44_hairpinning_fn (vlib_main_t * vm, vnet_get_config_data (&cm->config_main, &b0->current_config_index, &next0, 0); - if (snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0)) + if (snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0, is_ed)) next0 = SNAT_IN2OUT_NEXT_LOOKUP; pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP; @@ -2157,12 +1949,20 @@ nat44_hairpinning_fn (vlib_main_t * vm, vlib_put_next_frame (vm, node, next_index, n_left_to_next); } - vlib_node_increment_counter (vm, nat44_hairpinning_node.index, + vlib_node_increment_counter (vm, stats_node_index, SNAT_IN2OUT_ERROR_IN2OUT_PACKETS, pkts_processed); return frame->n_vectors; } +static uword +nat44_hairpinning_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return nat44_hairpinning_fn_inline (vm, node, frame, 0); +} + VLIB_REGISTER_NODE (nat44_hairpinning_node) = { .function = nat44_hairpinning_fn, .name = "nat44-hairpinning", @@ -2180,6 +1980,31 @@ VLIB_REGISTER_NODE (nat44_hairpinning_node) = { VLIB_NODE_FUNCTION_MULTIARCH (nat44_hairpinning_node, nat44_hairpinning_fn); +static uword +nat44_ed_hairpinning_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return nat44_hairpinning_fn_inline (vm, node, frame, 1); +} + +VLIB_REGISTER_NODE (nat44_ed_hairpinning_node) = { + .function = nat44_ed_hairpinning_fn, + .name = "nat44-ed-hairpinning", + .vector_size = sizeof (u32), + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = ARRAY_LEN(snat_in2out_error_strings), + .error_strings = snat_in2out_error_strings, + .n_next_nodes = 2, + .next_nodes = { + [SNAT_IN2OUT_NEXT_DROP] = "error-drop", + [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup", + }, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_hairpinning_node, + nat44_ed_hairpinning_fn); + static inline void nat44_reass_hairpinning (snat_main_t *sm, vlib_buffer_t * b0, @@ -2206,7 +2031,7 @@ nat44_reass_hairpinning (snat_main_t *sm, udp0 = ip4_next_header (ip0); /* Check if destination is static mappings */ - if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0)) + if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0, 0, 0)) { new_dst_addr0 = sm0.addr.as_u32; new_dst_port0 = sm0.port; @@ -2285,7 +2110,7 @@ nat44_in2out_reass_node_fn (vlib_main_t * vm, u32 pkts_processed = 0; snat_main_t *sm = &snat_main; f64 now = vlib_time_now (vm); - u32 thread_index = vlib_get_thread_index (); + u32 thread_index = vm->thread_index; snat_main_per_thread_data_t *per_thread_data = &sm->per_thread_data[thread_index]; u32 *fragments_to_drop = 0; @@ -2355,6 +2180,7 @@ nat44_in2out_reass_node_fn (vlib_main_t * vm, { next0 = SNAT_IN2OUT_NEXT_DROP; b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_REASS]; + nat_log_notice ("maximum reassemblies exceeded"); goto trace0; } @@ -2373,7 +2199,7 @@ nat44_in2out_reass_node_fn (vlib_main_t * vm, goto trace0; next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0, - &s0, node, next0, thread_index); + &s0, node, next0, thread_index, now); if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP)) goto trace0; @@ -2395,6 +2221,7 @@ nat44_in2out_reass_node_fn (vlib_main_t * vm, if (nat_ip4_reass_add_fragment (reass0, bi0)) { b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_FRAG]; + nat_log_notice ("maximum fragments per reassembly exceeded"); next0 = SNAT_IN2OUT_NEXT_DROP; goto trace0; } @@ -2424,123 +2251,1688 @@ nat44_in2out_reass_node_fn (vlib_main_t * vm, tcp0->src_port = s0->out2in.port; new_port0 = tcp0->src_port; - sum0 = tcp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */); - sum0 = ip_csum_update (sum0, old_port0, new_port0, - ip4_header_t /* cheat */, - length /* changed member */); - tcp0->checksum = ip_csum_fold(sum0); + sum0 = tcp0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, + dst_address /* changed member */); + sum0 = ip_csum_update (sum0, old_port0, new_port0, + ip4_header_t /* cheat */, + length /* changed member */); + tcp0->checksum = ip_csum_fold(sum0); + } + else + { + old_port0 = udp0->src_port; + udp0->src_port = s0->out2in.port; + udp0->checksum = 0; + } + } + + /* Hairpinning */ + nat44_reass_hairpinning (sm, b0, ip0, s0->out2in.port, + s0->ext_host_port, proto0); + + /* Accounting */ + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (vm, b0)); + /* 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_in2out_reass_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->cached = cached0; + t->sw_if_index = sw_if_index0; + t->next_index = next0; + } + + if (cached0) + { + n_left_to_next++; + to_next--; + } + else + { + pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP; + + /* 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 (n_left_from == 0 && vec_len (fragments_to_loopback)) + { + from = vlib_frame_vector_args (frame); + u32 len = vec_len (fragments_to_loopback); + if (len <= VLIB_FRAME_SIZE) + { + clib_memcpy (from, fragments_to_loopback, sizeof (u32) * len); + n_left_from = len; + vec_reset_length (fragments_to_loopback); + } + else + { + clib_memcpy (from, + fragments_to_loopback + (len - VLIB_FRAME_SIZE), + sizeof (u32) * VLIB_FRAME_SIZE); + n_left_from = VLIB_FRAME_SIZE; + _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE; + } + } + } + + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + + vlib_node_increment_counter (vm, nat44_in2out_reass_node.index, + SNAT_IN2OUT_ERROR_IN2OUT_PACKETS, + pkts_processed); + + nat_send_all_to_node (vm, fragments_to_drop, node, + &node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT], + SNAT_IN2OUT_NEXT_DROP); + + vec_free (fragments_to_drop); + vec_free (fragments_to_loopback); + return frame->n_vectors; +} + +VLIB_REGISTER_NODE (nat44_in2out_reass_node) = { + .function = nat44_in2out_reass_node_fn, + .name = "nat44-in2out-reass", + .vector_size = sizeof (u32), + .format_trace = format_nat44_in2out_reass_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(snat_in2out_error_strings), + .error_strings = snat_in2out_error_strings, + + .n_next_nodes = SNAT_IN2OUT_N_NEXT, + .next_nodes = { + [SNAT_IN2OUT_NEXT_DROP] = "error-drop", + [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup", + [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath", + [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error", + [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass", + }, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (nat44_in2out_reass_node, + nat44_in2out_reass_node_fn); + +/*******************************/ +/*** endpoint-dependent mode ***/ +/*******************************/ + +static_always_inline int +icmp_get_ed_key(ip4_header_t *ip0, nat_ed_ses_key_t *p_key0) +{ + icmp46_header_t *icmp0; + nat_ed_ses_key_t key0; + icmp_echo_header_t *echo0, *inner_echo0 = 0; + ip4_header_t *inner_ip0 = 0; + void *l4_header = 0; + icmp46_header_t *inner_icmp0; + + icmp0 = (icmp46_header_t *) ip4_next_header (ip0); + echo0 = (icmp_echo_header_t *)(icmp0+1); + + if (!icmp_is_error_message (icmp0)) + { + key0.proto = IP_PROTOCOL_ICMP; + key0.l_addr = ip0->src_address; + key0.r_addr = ip0->dst_address; + key0.l_port = echo0->identifier; + key0.r_port = 0; + } + else + { + inner_ip0 = (ip4_header_t *)(echo0+1); + l4_header = ip4_next_header (inner_ip0); + key0.proto = inner_ip0->protocol; + key0.r_addr = inner_ip0->src_address; + key0.l_addr = inner_ip0->dst_address; + switch (ip_proto_to_snat_proto (inner_ip0->protocol)) + { + case SNAT_PROTOCOL_ICMP: + inner_icmp0 = (icmp46_header_t*)l4_header; + inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1); + key0.r_port = 0; + key0.l_port = inner_echo0->identifier; + break; + case SNAT_PROTOCOL_UDP: + case SNAT_PROTOCOL_TCP: + key0.l_port = ((tcp_udp_header_t*)l4_header)->dst_port; + key0.r_port = ((tcp_udp_header_t*)l4_header)->src_port; + break; + default: + return SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL; + } + } + *p_key0 = key0; + return 0; +} + +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; + 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 (is_fwd_bypass_session (s)) + goto delete; + + ed_key.l_addr = s->out2in.addr; + ed_key.r_addr = s->ext_host_addr; + ed_key.fib_index = s->out2in.fib_index; + if (snat_is_unk_proto_session (s)) + { + ed_key.proto = s->in2out.port; + ed_key.r_port = 0; + ed_key.l_port = 0; + } + else + { + ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol); + ed_key.l_port = s->out2in.port; + ed_key.r_port = s->ext_host_port; + } + ed_kv.key[0] = ed_key.as_u64[0]; + ed_kv.key[1] = ed_key.as_u64[1]; + if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &ed_kv, 0)) + nat_log_warn ("out2in_ed key del failed"); + + if (snat_is_unk_proto_session (s)) + goto delete; + + snat_ipfix_logging_nat44_ses_delete(s->in2out.addr.as_u32, + s->out2in.addr.as_u32, + s->in2out.protocol, + s->in2out.port, + s->out2in.port, + s->in2out.fib_index); + + if (is_twice_nat_session (s)) + { + for (i = 0; i < vec_len (sm->twice_nat_addresses); i++) + { + key.protocol = s->in2out.protocol; + key.port = s->ext_host_nat_port; + a = sm->twice_nat_addresses + i; + if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32) + { + snat_free_outside_address_and_port (sm->twice_nat_addresses, + ctx->thread_index, &key); + break; + } + } + } + + if (snat_is_session_static (s)) + goto delete; + + if (s->outside_address_index != ~0) + snat_free_outside_address_and_port (sm->addresses, ctx->thread_index, + &s->out2in); + delete: + nat44_delete_session (sm, s, ctx->thread_index); + return 1; + } + + return 0; +} + +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) +{ + 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 != SNAT_IN2OUT_NEXT_DROP && s0)) + { + /* Hairpinning */ + if (vnet_buffer(b0)->sw_if_index[VLIB_TX] == ~0) + snat_icmp_hairpinning(sm, b0, ip0, icmp0, sm->endpoint_dependent); + /* Accounting */ + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (sm->vlib_main, b0)); + } + return next0; +} + +static u32 +slow_path_ed (snat_main_t *sm, + vlib_buffer_t *b, + u32 rx_fib_index, + clib_bihash_kv_16_8_t *kv, + snat_session_t ** sessionp, + vlib_node_runtime_t * node, + u32 next, + u32 thread_index, + f64 now) +{ + snat_session_t *s; + snat_user_t *u; + snat_session_key_t key0, key1; + u8 lb = 0, is_sm = 0; + u32 address_index = ~0; + snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; + nat_ed_ses_key_t *key = (nat_ed_ses_key_t *) kv->key; + u32 proto = ip_proto_to_snat_proto (key->proto); + nat_outside_fib_t *outside_fib; + fib_node_index_t fei = FIB_NODE_INDEX_INVALID; + fib_prefix_t pfx = { + .fp_proto = FIB_PROTOCOL_IP4, + .fp_len = 32, + .fp_addr = { + .ip4.as_u32 = key->r_addr.as_u32, + }, + }; + nat44_is_idle_session_ctx_t ctx; + + if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index))) + { + b->error = node->errors[SNAT_IN2OUT_ERROR_MAX_SESSIONS_EXCEEDED]; + nat_ipfix_logging_max_sessions(sm->max_translations); + nat_log_notice ("maximum sessions exceeded"); + return SNAT_IN2OUT_NEXT_DROP; + } + + key0.addr = key->l_addr; + key0.port = key->l_port; + key1.protocol = key0.protocol = proto; + key0.fib_index = rx_fib_index; + key1.fib_index = sm->outside_fib_index; + /* First try to match static mapping by local address and port */ + if (snat_static_mapping_match (sm, key0, &key1, 0, 0, 0, &lb)) + { + /* Try to create dynamic translation */ + if (snat_alloc_outside_address_and_port (sm->addresses, rx_fib_index, + thread_index, &key1, + &address_index, + sm->port_per_thread, + tsm->snat_thread_index)) + { + nat_log_notice ("addresses exhausted"); + b->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS]; + return SNAT_IN2OUT_NEXT_DROP; + } + } + else + is_sm = 1; + + u = nat_user_get_or_create (sm, &key->l_addr, rx_fib_index, thread_index); + if (!u) + { + nat_log_warn ("create NAT user failed"); + if (!is_sm) + snat_free_outside_address_and_port (sm->addresses, + thread_index, &key1); + return SNAT_IN2OUT_NEXT_DROP; + } + + s = nat_ed_session_alloc (sm, u, thread_index); + if (!s) + { + nat44_delete_user_with_no_session (sm, u, thread_index); + nat_log_warn ("create NAT session failed"); + if (!is_sm) + snat_free_outside_address_and_port (sm->addresses, + thread_index, &key1); + return SNAT_IN2OUT_NEXT_DROP; + } + + user_session_increment (sm, u, is_sm); + if (is_sm) + s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; + if (lb) + s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING; + s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT; + s->outside_address_index = address_index; + s->ext_host_addr = key->r_addr; + s->ext_host_port = key->r_port; + s->in2out = key0; + s->out2in = key1; + s->out2in.protocol = key0.protocol; + + 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: + vec_foreach (outside_fib, sm->outside_fibs) + { + fei = fib_table_lookup (outside_fib->fib_index, &pfx); + if (FIB_NODE_INDEX_INVALID != fei) + { + if (fib_entry_get_resolving_interface (fei) != ~0) + { + s->out2in.fib_index = outside_fib->fib_index; + break; + } + } + } + break; + } + + /* Add to lookup tables */ + kv->value = s - tsm->sessions; + ctx.now = now; + ctx.thread_index = thread_index; + if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, kv, + nat44_i2o_ed_is_idle_session_cb, + &ctx)) + nat_log_notice ("in2out-ed key add failed"); + + make_ed_kv (kv, &key1.addr, &key->r_addr, key->proto, s->out2in.fib_index, + key1.port, key->r_port); + kv->value = s - tsm->sessions; + if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->out2in_ed, kv, + nat44_o2i_ed_is_idle_session_cb, + &ctx)) + nat_log_notice ("out2in-ed key add failed"); + + *sessionp = s; + + /* log NAT event */ + snat_ipfix_logging_nat44_ses_create(s->in2out.addr.as_u32, + s->out2in.addr.as_u32, + s->in2out.protocol, + s->in2out.port, + s->out2in.port, + s->in2out.fib_index); + return next; +} + +static_always_inline int +nat44_ed_not_translate (snat_main_t * sm, vlib_node_runtime_t *node, + u32 sw_if_index, ip4_header_t * ip, u32 proto, + u32 rx_fib_index, u32 thread_index) +{ + udp_header_t *udp = ip4_next_header (ip); + snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; + clib_bihash_kv_16_8_t kv, value; + snat_session_key_t key0, key1; + + make_ed_kv (&kv, &ip->dst_address, &ip->src_address, ip->protocol, + sm->outside_fib_index, udp->dst_port, udp->src_port); + + /* NAT packet aimed at external address if */ + /* has active sessions */ + if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value)) + { + key0.addr = ip->dst_address; + key0.port = udp->dst_port; + key0.protocol = proto; + key0.fib_index = sm->outside_fib_index; + /* or is static mappings */ + if (!snat_static_mapping_match(sm, key0, &key1, 1, 0, 0, 0)) + return 0; + } + else + return 0; + + if (sm->forwarding_enabled) + return 1; + + return snat_not_translate_fast(sm, node, sw_if_index, ip, proto, rx_fib_index); +} + +static_always_inline int +nat_not_translate_output_feature_fwd (snat_main_t * sm, ip4_header_t * ip, + u32 thread_index, f64 now, + vlib_main_t * vm, vlib_buffer_t * b) +{ + nat_ed_ses_key_t key; + clib_bihash_kv_16_8_t kv, value; + udp_header_t *udp; + snat_session_t *s = 0; + snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; + + if (!sm->forwarding_enabled) + return 0; + + if (ip->protocol == IP_PROTOCOL_ICMP) + { + key.as_u64[0] = key.as_u64[1] = 0; + if (icmp_get_ed_key (ip, &key)) + return 0; + key.fib_index = 0; + kv.key[0] = key.as_u64[0]; + kv.key[1] = key.as_u64[1]; + } + else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP) + { + udp = ip4_next_header(ip); + make_ed_kv (&kv, &ip->src_address, &ip->dst_address, ip->protocol, 0, + udp->src_port, udp->dst_port); + } + else + { + make_ed_kv (&kv, &ip->src_address, &ip->dst_address, ip->protocol, 0, 0, + 0); + } + + if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value)) + { + s = pool_elt_at_index (tsm->sessions, value.value); + if (is_fwd_bypass_session (s)) + { + if (ip->protocol == IP_PROTOCOL_TCP) + { + tcp_header_t *tcp = ip4_next_header(ip); + if (nat44_set_tcp_session_state_i2o (sm, s, tcp, thread_index)) + return 1; + } + /* Accounting */ + nat44_session_update_counters (s, now, + vlib_buffer_length_in_chain (vm, b)); + return 1; + } + else + return 0; + } + + return 0; +} + +static_always_inline int +nat44_ed_not_translate_output_feature (snat_main_t * sm, ip4_header_t * ip, + u8 proto, u16 src_port, u16 dst_port, + u32 thread_index, u32 sw_if_index) +{ + clib_bihash_kv_16_8_t kv, value; + snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; + snat_interface_t *i; + snat_session_t *s; + u32 fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index); + + /* src NAT check */ + make_ed_kv (&kv, &ip->src_address, &ip->dst_address, proto, fib_index, + src_port, dst_port); + if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value)) + return 1; + + /* dst NAT check */ + make_ed_kv (&kv, &ip->dst_address, &ip->src_address, proto, fib_index, + dst_port, src_port); + if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value)) + { + s = pool_elt_at_index (tsm->sessions, value.value); + if (is_fwd_bypass_session (s)) + return 0; + + /* hairpinning */ + pool_foreach (i, sm->output_feature_interfaces, + ({ + if ((nat_interface_is_inside(i)) && (sw_if_index == i->sw_if_index)) + return 0; + })); + return 1; + } + + return 0; +} + +u32 +icmp_match_in2out_ed(snat_main_t *sm, vlib_node_runtime_t *node, + u32 thread_index, vlib_buffer_t *b, ip4_header_t *ip, + u8 *p_proto, snat_session_key_t *p_value, + u8 *p_dont_translate, void *d, void *e) +{ + icmp46_header_t *icmp; + u32 sw_if_index; + u32 rx_fib_index; + nat_ed_ses_key_t key; + snat_session_t *s = 0; + u8 dont_translate = 0; + clib_bihash_kv_16_8_t kv, value; + u32 next = ~0; + int err; + snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; + + icmp = (icmp46_header_t *) ip4_next_header (ip); + sw_if_index = vnet_buffer(b)->sw_if_index[VLIB_RX]; + rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index); + + key.as_u64[0] = key.as_u64[1] = 0; + err = icmp_get_ed_key (ip, &key); + if (err != 0) + { + b->error = node->errors[err]; + next = SNAT_IN2OUT_NEXT_DROP; + goto out; + } + key.fib_index = rx_fib_index; + + kv.key[0] = key.as_u64[0]; + kv.key[1] = key.as_u64[1]; + + if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value)) + { + if (vnet_buffer(b)->sw_if_index[VLIB_TX] != ~0) + { + if (PREDICT_FALSE(nat44_ed_not_translate_output_feature(sm, ip, + key.proto, key.l_port, key.r_port, thread_index, sw_if_index))) + { + dont_translate = 1; + goto out; + } + } + else + { + if (PREDICT_FALSE(nat44_ed_not_translate(sm, node, sw_if_index, + ip, SNAT_PROTOCOL_ICMP, rx_fib_index, thread_index))) + { + dont_translate = 1; + goto out; + } + } + + if (PREDICT_FALSE(icmp_is_error_message (icmp))) + { + b->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE]; + next = SNAT_IN2OUT_NEXT_DROP; + goto out; + } + + next = slow_path_ed (sm, b, rx_fib_index, &kv, &s, node, next, + thread_index, vlib_time_now (sm->vlib_main)); + + if (PREDICT_FALSE (next == SNAT_IN2OUT_NEXT_DROP)) + goto out; + } + else + { + if (PREDICT_FALSE(icmp->type != ICMP4_echo_request && + icmp->type != ICMP4_echo_reply && + !icmp_is_error_message (icmp))) + { + b->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE]; + next = SNAT_IN2OUT_NEXT_DROP; + goto out; + } + + s = pool_elt_at_index (tsm->sessions, value.value); + } + + *p_proto = ip_proto_to_snat_proto (key.proto); +out: + if (s) + *p_value = s->out2in; + *p_dont_translate = dont_translate; + if (d) + *(snat_session_t**)d = s; + return next; +} + +static inline void +nat44_ed_hairpinning_unknown_proto (snat_main_t *sm, + vlib_buffer_t * b, + ip4_header_t * ip) +{ + u32 old_addr, new_addr = 0, ti = 0; + clib_bihash_kv_8_8_t kv, value; + clib_bihash_kv_16_8_t s_kv, s_value; + snat_static_mapping_t *m; + ip_csum_t sum; + snat_session_t *s; + snat_main_per_thread_data_t *tsm; + + if (sm->num_workers > 1) + ti = sm->worker_out2in_cb (ip, sm->outside_fib_index); + else + ti = sm->num_workers; + tsm = &sm->per_thread_data[ti]; + + old_addr = ip->dst_address.as_u32; + make_ed_kv (&s_kv, &ip->dst_address, &ip->src_address, ip->protocol, + sm->outside_fib_index, 0, 0); + if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value)) + { + make_sm_kv (&kv, &ip->dst_address, 0, 0, 0); + if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) + return; + + m = pool_elt_at_index (sm->static_mappings, value.value); + if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0) + vnet_buffer(b)->sw_if_index[VLIB_TX] = m->fib_index; + new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32; + } + else + { + s = pool_elt_at_index (sm->per_thread_data[ti].sessions, s_value.value); + if (vnet_buffer(b)->sw_if_index[VLIB_TX] == ~0) + vnet_buffer(b)->sw_if_index[VLIB_TX] = s->in2out.fib_index; + new_addr = ip->dst_address.as_u32 = s->in2out.addr.as_u32; + } + sum = ip->checksum; + sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address); + ip->checksum = ip_csum_fold (sum); +} + +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) +{ + 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_user_t *u; + dlist_elt_t *head, *elt; + snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; + u32 elt_index, head_index, ses_index; + snat_session_t * s; + u32 address_index = ~0, outside_fib_index = sm->outside_fib_index; + int i; + u8 is_sm = 0; + nat_outside_fib_t *outside_fib; + fib_node_index_t fei = FIB_NODE_INDEX_INVALID; + fib_prefix_t pfx = { + .fp_proto = FIB_PROTOCOL_IP4, + .fp_len = 32, + .fp_addr = { + .ip4.as_u32 = ip->dst_address.as_u32, + }, + }; + + switch (vec_len (sm->outside_fibs)) + { + case 0: + outside_fib_index = sm->outside_fib_index; + break; + case 1: + outside_fib_index = sm->outside_fibs[0].fib_index; + break; + default: + vec_foreach (outside_fib, sm->outside_fibs) + { + fei = fib_table_lookup (outside_fib->fib_index, &pfx); + if (FIB_NODE_INDEX_INVALID != fei) + { + if (fib_entry_get_resolving_interface (fei) != ~0) + { + outside_fib_index = outside_fib->fib_index; + break; + } + } + } + break; + } + old_addr = ip->src_address.as_u32; + + make_ed_kv (&s_kv, &ip->src_address, &ip->dst_address, ip->protocol, + rx_fib_index, 0, 0); + + if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &s_kv, &s_value)) + { + s = pool_elt_at_index (tsm->sessions, s_value.value); + new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32; + } + else + { + if (PREDICT_FALSE (maximum_sessions_exceeded(sm, thread_index))) + { + b->error = node->errors[SNAT_IN2OUT_ERROR_MAX_SESSIONS_EXCEEDED]; + nat_ipfix_logging_max_sessions(sm->max_translations); + nat_log_notice ("maximum sessions exceeded"); + return 0; + } + + u = nat_user_get_or_create (sm, &ip->src_address, rx_fib_index, + thread_index); + if (!u) + { + nat_log_warn ("create NAT user failed"); + return 0; + } + + make_sm_kv (&kv, &ip->src_address, 0, rx_fib_index, 0); + + /* Try to find static mapping first */ + if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value)) + { + 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; + } + /* Fallback to 3-tuple key */ + else + { + /* Choose same out address as for TCP/UDP session to same destination */ + head_index = u->sessions_per_user_list_head_index; + head = pool_elt_at_index (tsm->list_pool, head_index); + elt_index = head->next; + if (PREDICT_FALSE (elt_index == ~0)) + ses_index = ~0; + else + { + elt = pool_elt_at_index (tsm->list_pool, elt_index); + ses_index = elt->value; + } + + while (ses_index != ~0) + { + s = pool_elt_at_index (tsm->sessions, ses_index); + elt_index = elt->next; + elt = pool_elt_at_index (tsm->list_pool, elt_index); + ses_index = elt->value; + + if (s->ext_host_addr.as_u32 == ip->dst_address.as_u32) + { + new_addr = ip->src_address.as_u32 = s->out2in.addr.as_u32; + address_index = s->outside_address_index; + + make_ed_kv (&s_kv, &s->out2in.addr, &ip->dst_address, + ip->protocol, outside_fib_index, 0, 0); + if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value)) + goto create_ses; + + break; + } + } + + for (i = 0; i < vec_len (sm->addresses); i++) + { + make_ed_kv (&s_kv, &sm->addresses[i].addr, &ip->dst_address, + ip->protocol, outside_fib_index, 0, 0); + if (clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value)) + { + new_addr = ip->src_address.as_u32 = + sm->addresses[i].addr.as_u32; + address_index = i; + goto create_ses; + } + } + return 0; + } + +create_ses: + s = nat_ed_session_alloc (sm, u, thread_index); + if (!s) + { + nat44_delete_user_with_no_session (sm, u, thread_index); + nat_log_warn ("create NAT session failed"); + 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->outside_address_index = address_index; + 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; + user_session_increment (sm, u, is_sm); + + /* Add to lookup tables */ + make_ed_kv (&s_kv, &s->in2out.addr, &ip->dst_address, ip->protocol, + rx_fib_index, 0, 0); + s_kv.value = s - tsm->sessions; + if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1)) + nat_log_notice ("in2out key add failed"); + + make_ed_kv (&s_kv, &s->out2in.addr, &ip->dst_address, ip->protocol, + outside_fib_index, 0, 0); + s_kv.value = s - tsm->sessions; + if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &s_kv, 1)) + nat_log_notice ("out2in key add failed"); + } + + /* 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); + + /* Accounting */ + nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b)); + + /* 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; +} + +static inline uword +nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, int is_slow_path, + int is_output_feature) +{ + u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index; + snat_in2out_next_t next_index; + 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]; + + stats_node_index = is_slow_path ? nat44_ed_in2out_slowpath_node.index : + nat44_ed_in2out_node.index; + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + next_index = node->cached_next_index; + + 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 >= 4 && n_left_to_next >= 2) + { + u32 bi0, bi1; + vlib_buffer_t *b0, *b1; + u32 next0, sw_if_index0, rx_fib_index0, iph_offset0 = 0, proto0, + new_addr0, old_addr0; + u32 next1, sw_if_index1, rx_fib_index1, iph_offset1 = 0, proto1, + new_addr1, old_addr1; + u16 old_port0, new_port0, old_port1, new_port1; + ip4_header_t *ip0, *ip1; + udp_header_t *udp0, *udp1; + tcp_header_t *tcp0, *tcp1; + icmp46_header_t *icmp0, *icmp1; + snat_session_t *s0 = 0, *s1 = 0; + clib_bihash_kv_16_8_t kv0, value0, kv1, value1; + ip_csum_t sum0, sum1; + + /* Prefetch next iteration. */ + { + vlib_buffer_t * p2, * p3; + + p2 = vlib_get_buffer (vm, from[2]); + p3 = vlib_get_buffer (vm, from[3]); + + vlib_prefetch_buffer_header (p2, LOAD); + vlib_prefetch_buffer_header (p3, LOAD); + + CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE); + CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE); + } + + /* speculatively enqueue b0 and b1 to the current next frame */ + to_next[0] = bi0 = from[0]; + to_next[1] = bi1 = from[1]; + from += 2; + to_next += 2; + n_left_from -= 2; + n_left_to_next -= 2; + + b0 = vlib_get_buffer (vm, bi0); + b1 = vlib_get_buffer (vm, bi1); + + next0 = SNAT_IN2OUT_NEXT_LOOKUP; + + if (is_output_feature) + iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length; + + 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); + next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR; + goto trace00; + } + + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + icmp0 = (icmp46_header_t *) udp0; + proto0 = ip_proto_to_snat_proto (ip0->protocol); + + if (is_slow_path) + { + if (PREDICT_FALSE (proto0 == ~0)) + { + s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0, + rx_fib_index0, + thread_index, now, vm, + node); + if (!s0) + next0 = SNAT_IN2OUT_NEXT_DROP; + goto trace00; + } + + if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) + { + next0 = icmp_in2out_ed_slow_path + (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, + next0, now, thread_index, &s0); + goto trace00; + } + } + else + { + if (is_output_feature) + { + if (PREDICT_FALSE(nat_not_translate_output_feature_fwd( + sm, ip0, thread_index, now, vm, b0))) + goto trace00; + } + + if (PREDICT_FALSE (proto0 == ~0 || proto0 == SNAT_PROTOCOL_ICMP)) + { + next0 = SNAT_IN2OUT_NEXT_SLOW_PATH; + goto trace00; + } + + if (ip4_is_fragment (ip0)) + { + b0->error = node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT]; + next0 = SNAT_IN2OUT_NEXT_DROP; + goto trace00; + } + } + + make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address, ip0->protocol, + rx_fib_index0, udp0->src_port, udp0->dst_port); + + if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0)) + { + if (is_slow_path) + { + if (is_output_feature) + { + if (PREDICT_FALSE(nat44_ed_not_translate_output_feature( + sm, ip0, ip0->protocol, udp0->src_port, + udp0->dst_port, thread_index, sw_if_index0))) + goto trace00; + } + else + { + if (PREDICT_FALSE(nat44_ed_not_translate(sm, node, + sw_if_index0, ip0, proto0, rx_fib_index0, + thread_index))) + goto trace00; + } + + next0 = slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node, + next0, thread_index, now); + + if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP)) + goto trace00; + } + else + { + next0 = SNAT_IN2OUT_NEXT_SLOW_PATH; + goto trace00; + } + } + else + { + s0 = pool_elt_at_index (tsm->sessions, value0.value); + } + + b0->flags |= VNET_BUFFER_F_IS_NATED; + + if (!is_output_feature) + vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index; + + old_addr0 = ip0->src_address.as_u32; + new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32; + sum0 = ip0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, + src_address); + if (PREDICT_FALSE (is_twice_nat_session (s0))) + sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32, + s0->ext_host_addr.as_u32, ip4_header_t, + dst_address); + ip0->checksum = ip_csum_fold (sum0); + + if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) + { + old_port0 = tcp0->src_port; + new_port0 = tcp0->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, tcp0->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; + } + tcp0->checksum = ip_csum_fold(sum0); + if (nat44_set_tcp_session_state_i2o (sm, s0, tcp0, thread_index)) + goto trace00; + } + else + { + udp0->src_port = s0->out2in.port; + udp0->checksum = 0; + 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; + } + } + + /* Accounting */ + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (vm, b0)); + + trace00: + if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + snat_in2out_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->is_slow_path = is_slow_path; + t->sw_if_index = sw_if_index0; + t->next_index = next0; + t->session_index = ~0; + if (s0) + t->session_index = s0 - tsm->sessions; + } + + pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP; + + + next1 = SNAT_IN2OUT_NEXT_LOOKUP; + + if (is_output_feature) + iph_offset1 = vnet_buffer (b1)->ip.save_rewrite_length; + + ip1 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b1) + + iph_offset1); + + sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX]; + rx_fib_index1 = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, + sw_if_index1); + + if (PREDICT_FALSE(ip1->ttl == 1)) + { + vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next1 = SNAT_IN2OUT_NEXT_ICMP_ERROR; + goto trace01; + } + + udp1 = ip4_next_header (ip1); + tcp1 = (tcp_header_t *) udp1; + icmp1 = (icmp46_header_t *) udp1; + proto1 = ip_proto_to_snat_proto (ip1->protocol); + + if (is_slow_path) + { + if (PREDICT_FALSE (proto1 == ~0)) + { + s1 = nat44_ed_in2out_unknown_proto (sm, b1, ip1, + rx_fib_index1, + thread_index, now, vm, + node); + if (!s1) + next1 = SNAT_IN2OUT_NEXT_DROP; + goto trace01; + } + + if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP)) + { + next1 = icmp_in2out_ed_slow_path + (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node, + next1, now, thread_index, &s1); + goto trace01; + } + } + else + { + if (is_output_feature) + { + if (PREDICT_FALSE(nat_not_translate_output_feature_fwd( + sm, ip1, thread_index, now, vm, b1))) + goto trace01; + } + + if (PREDICT_FALSE (proto1 == ~0 || proto1 == SNAT_PROTOCOL_ICMP)) + { + next1 = SNAT_IN2OUT_NEXT_SLOW_PATH; + goto trace01; + } + + if (ip4_is_fragment (ip1)) + { + b1->error = node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT]; + next1 = SNAT_IN2OUT_NEXT_DROP; + goto trace01; + } + } + + make_ed_kv (&kv1, &ip1->src_address, &ip1->dst_address, ip1->protocol, + rx_fib_index1, udp1->src_port, udp1->dst_port); + + if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv1, &value1)) + { + if (is_slow_path) + { + if (is_output_feature) + { + if (PREDICT_FALSE(nat44_ed_not_translate_output_feature( + sm, ip1, ip1->protocol, udp1->src_port, + udp1->dst_port, thread_index, sw_if_index1))) + goto trace01; + } + else + { + if (PREDICT_FALSE(nat44_ed_not_translate(sm, node, + sw_if_index1, ip1, proto1, rx_fib_index1, + thread_index))) + goto trace01; + } + + next1 = slow_path_ed (sm, b1, rx_fib_index1, &kv1, &s1, node, + next1, thread_index, now); + + if (PREDICT_FALSE (next1 == SNAT_IN2OUT_NEXT_DROP)) + goto trace01; + } + else + { + next1 = SNAT_IN2OUT_NEXT_SLOW_PATH; + goto trace01; + } + } + else + { + s1 = pool_elt_at_index (tsm->sessions, value1.value); + } + + b1->flags |= VNET_BUFFER_F_IS_NATED; + + if (!is_output_feature) + vnet_buffer(b1)->sw_if_index[VLIB_TX] = s1->out2in.fib_index; + + old_addr1 = ip1->src_address.as_u32; + new_addr1 = ip1->src_address.as_u32 = s1->out2in.addr.as_u32; + sum1 = ip1->checksum; + sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t, + src_address); + if (PREDICT_FALSE (is_twice_nat_session (s1))) + sum1 = ip_csum_update (sum1, ip1->dst_address.as_u32, + s1->ext_host_addr.as_u32, ip4_header_t, + dst_address); + ip1->checksum = ip_csum_fold (sum1); + + if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP)) + { + old_port1 = tcp1->src_port; + new_port1 = tcp1->src_port = s1->out2in.port; + + sum1 = tcp1->checksum; + sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t, + dst_address); + sum1 = ip_csum_update (sum1, old_port1, new_port1, ip4_header_t, + length); + if (PREDICT_FALSE (is_twice_nat_session (s1))) + { + sum1 = ip_csum_update (sum1, ip1->dst_address.as_u32, + s1->ext_host_addr.as_u32, + ip4_header_t, dst_address); + sum1 = ip_csum_update (sum1, tcp1->dst_port, + s1->ext_host_port, ip4_header_t, + length); + tcp1->dst_port = s1->ext_host_port; + ip1->dst_address.as_u32 = s1->ext_host_addr.as_u32; + } + tcp1->checksum = ip_csum_fold(sum1); + if (nat44_set_tcp_session_state_i2o (sm, s1, tcp1, thread_index)) + goto trace01; + } + else + { + udp1->src_port = s1->out2in.port; + udp1->checksum = 0; + if (PREDICT_FALSE (is_twice_nat_session (s1))) + { + udp1->dst_port = s1->ext_host_port; + ip1->dst_address.as_u32 = s1->ext_host_addr.as_u32; + } + } + + /* Accounting */ + nat44_session_update_counters (s1, now, + vlib_buffer_length_in_chain (vm, b1)); + + trace01: + if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) + && (b1->flags & VLIB_BUFFER_IS_TRACED))) + { + snat_in2out_trace_t *t = + vlib_add_trace (vm, node, b1, sizeof (*t)); + t->is_slow_path = is_slow_path; + t->sw_if_index = sw_if_index1; + t->next_index = next1; + t->session_index = ~0; + if (s1) + t->session_index = s1 - tsm->sessions; + } + + pkts_processed += next1 != SNAT_IN2OUT_NEXT_DROP; + + /* verify speculative enqueues, maybe switch current next frame */ + vlib_validate_buffer_enqueue_x2 (vm, node, next_index, + to_next, n_left_to_next, + bi0, bi1, next0, next1); + } + + 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); + next0 = SNAT_IN2OUT_NEXT_LOOKUP; + + if (is_output_feature) + iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length; + + 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); + next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR; + goto trace0; + } + + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + icmp0 = (icmp46_header_t *) udp0; + proto0 = ip_proto_to_snat_proto (ip0->protocol); + + if (is_slow_path) + { + if (PREDICT_FALSE (proto0 == ~0)) + { + s0 = nat44_ed_in2out_unknown_proto (sm, b0, ip0, + rx_fib_index0, + thread_index, now, vm, + node); + if (!s0) + next0 = SNAT_IN2OUT_NEXT_DROP; + goto trace0; + } + + if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) + { + next0 = icmp_in2out_ed_slow_path + (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, + next0, now, thread_index, &s0); + goto trace0; + } + } + else + { + if (is_output_feature) + { + if (PREDICT_FALSE(nat_not_translate_output_feature_fwd( + sm, ip0, thread_index, now, vm, b0))) + goto trace0; + } + + if (PREDICT_FALSE (proto0 == ~0 || proto0 == SNAT_PROTOCOL_ICMP)) + { + next0 = SNAT_IN2OUT_NEXT_SLOW_PATH; + goto trace0; + } + + if (ip4_is_fragment (ip0)) + { + b0->error = node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT]; + next0 = SNAT_IN2OUT_NEXT_DROP; + goto trace0; + } + } + + make_ed_kv (&kv0, &ip0->src_address, &ip0->dst_address, ip0->protocol, + rx_fib_index0, udp0->src_port, udp0->dst_port); + + if (clib_bihash_search_16_8 (&tsm->in2out_ed, &kv0, &value0)) + { + if (is_slow_path) + { + if (is_output_feature) + { + if (PREDICT_FALSE(nat44_ed_not_translate_output_feature( + sm, ip0, ip0->protocol, udp0->src_port, + udp0->dst_port, thread_index, sw_if_index0))) + goto trace0; + } + else + { + if (PREDICT_FALSE(nat44_ed_not_translate(sm, node, + sw_if_index0, ip0, proto0, rx_fib_index0, + thread_index))) + goto trace0; + } + + next0 = slow_path_ed (sm, b0, rx_fib_index0, &kv0, &s0, node, + next0, thread_index, now); + + if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP)) + goto trace0; + } + else + { + next0 = SNAT_IN2OUT_NEXT_SLOW_PATH; + goto trace0; + } + } + else + { + s0 = pool_elt_at_index (tsm->sessions, value0.value); + } + + b0->flags |= VNET_BUFFER_F_IS_NATED; + + if (!is_output_feature) + vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index; + + old_addr0 = ip0->src_address.as_u32; + new_addr0 = ip0->src_address.as_u32 = s0->out2in.addr.as_u32; + sum0 = ip0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, + src_address); + if (PREDICT_FALSE (is_twice_nat_session (s0))) + sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32, + s0->ext_host_addr.as_u32, ip4_header_t, + dst_address); + ip0->checksum = ip_csum_fold (sum0); + + if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) + { + old_port0 = tcp0->src_port; + new_port0 = tcp0->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, tcp0->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; } - else + tcp0->checksum = ip_csum_fold(sum0); + if (nat44_set_tcp_session_state_i2o (sm, s0, tcp0, thread_index)) + goto trace0; + } + else + { + udp0->src_port = s0->out2in.port; + udp0->checksum = 0; + if (PREDICT_FALSE (is_twice_nat_session (s0))) { - old_port0 = udp0->src_port; - udp0->src_port = s0->out2in.port; - udp0->checksum = 0; + udp0->dst_port = s0->ext_host_port; + ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; } } - /* Hairpinning */ - nat44_reass_hairpinning (sm, b0, ip0, s0->out2in.port, - s0->ext_host_port, proto0); - /* Accounting */ - s0->last_heard = now; - s0->total_pkts++; - s0->total_bytes += vlib_buffer_length_in_chain (vm, b0); - /* Per-user LRU list maintenance */ - clib_dlist_remove (sm->per_thread_data[thread_index].list_pool, - s0->per_user_index); - clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool, - s0->per_user_list_head_index, - s0->per_user_index); + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (vm, b0)); trace0: if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) && (b0->flags & VLIB_BUFFER_IS_TRACED))) { - nat44_in2out_reass_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->cached = cached0; + snat_in2out_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->is_slow_path = is_slow_path; t->sw_if_index = sw_if_index0; t->next_index = next0; + t->session_index = ~0; + if (s0) + t->session_index = s0 - tsm->sessions; } - if (cached0) - { - n_left_to_next++; - to_next--; - } - else - { - pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP; - - /* 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); - } + pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP; - if (n_left_from == 0 && vec_len (fragments_to_loopback)) - { - from = vlib_frame_vector_args (frame); - u32 len = vec_len (fragments_to_loopback); - if (len <= VLIB_FRAME_SIZE) - { - clib_memcpy (from, fragments_to_loopback, sizeof (u32) * len); - n_left_from = len; - vec_reset_length (fragments_to_loopback); - } - else - { - clib_memcpy (from, - fragments_to_loopback + (len - VLIB_FRAME_SIZE), - sizeof (u32) * VLIB_FRAME_SIZE); - n_left_from = VLIB_FRAME_SIZE; - _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE; - } - } - } + /* 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); + } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } - vlib_node_increment_counter (vm, nat44_in2out_reass_node.index, + vlib_node_increment_counter (vm, stats_node_index, SNAT_IN2OUT_ERROR_IN2OUT_PACKETS, pkts_processed); + return frame->n_vectors; +} - nat_send_all_to_node (vm, fragments_to_drop, node, - &node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT], - SNAT_IN2OUT_NEXT_DROP); +static uword +nat44_ed_in2out_fast_path_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return nat44_ed_in2out_node_fn_inline (vm, node, frame, 0, 0); +} - vec_free (fragments_to_drop); - vec_free (fragments_to_loopback); - return frame->n_vectors; +VLIB_REGISTER_NODE (nat44_ed_in2out_node) = { + .function = nat44_ed_in2out_fast_path_fn, + .name = "nat44-ed-in2out", + .vector_size = sizeof (u32), + .format_trace = format_snat_in2out_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(snat_in2out_error_strings), + .error_strings = snat_in2out_error_strings, + + .runtime_data_bytes = sizeof (snat_runtime_t), + + .n_next_nodes = SNAT_IN2OUT_N_NEXT, + + /* edit / add dispositions here */ + .next_nodes = { + [SNAT_IN2OUT_NEXT_DROP] = "error-drop", + [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup", + [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-ed-in2out-slowpath", + [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error", + [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass", + }, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_node, nat44_ed_in2out_fast_path_fn); + +static uword +nat44_ed_in2out_output_fast_path_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return nat44_ed_in2out_node_fn_inline (vm, node, frame, 0, 1); } -VLIB_REGISTER_NODE (nat44_in2out_reass_node) = { - .function = nat44_in2out_reass_node_fn, - .name = "nat44-in2out-reass", +VLIB_REGISTER_NODE (nat44_ed_in2out_output_node) = { + .function = nat44_ed_in2out_output_fast_path_fn, + .name = "nat44-ed-in2out-output", .vector_size = sizeof (u32), - .format_trace = format_nat44_in2out_reass_trace, + .format_trace = format_snat_in2out_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(snat_in2out_error_strings), + .error_strings = snat_in2out_error_strings, + + .runtime_data_bytes = sizeof (snat_runtime_t), + + .n_next_nodes = SNAT_IN2OUT_N_NEXT, + + /* edit / add dispositions here */ + .next_nodes = { + [SNAT_IN2OUT_NEXT_DROP] = "error-drop", + [SNAT_IN2OUT_NEXT_LOOKUP] = "interface-output", + [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-ed-in2out-output-slowpath", + [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error", + [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass", + }, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_output_node, + nat44_ed_in2out_output_fast_path_fn); + +static uword +nat44_ed_in2out_slow_path_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return nat44_ed_in2out_node_fn_inline (vm, node, frame, 1, 0); +} + +VLIB_REGISTER_NODE (nat44_ed_in2out_slowpath_node) = { + .function = nat44_ed_in2out_slow_path_fn, + .name = "nat44-ed-in2out-slowpath", + .vector_size = sizeof (u32), + .format_trace = format_snat_in2out_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN(snat_in2out_error_strings), .error_strings = snat_in2out_error_strings, + .runtime_data_bytes = sizeof (snat_runtime_t), + .n_next_nodes = SNAT_IN2OUT_N_NEXT, + + /* edit / add dispositions here */ .next_nodes = { [SNAT_IN2OUT_NEXT_DROP] = "error-drop", [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup", - [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-slowpath", + [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-ed-in2out-slowpath", [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error", [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass", }, }; -VLIB_NODE_FUNCTION_MULTIARCH (nat44_in2out_reass_node, - nat44_in2out_reass_node_fn); +VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_slowpath_node, + nat44_ed_in2out_slow_path_fn); + +static uword +nat44_ed_in2out_output_slow_path_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return nat44_ed_in2out_node_fn_inline (vm, node, frame, 1, 1); +} + +VLIB_REGISTER_NODE (nat44_ed_in2out_output_slowpath_node) = { + .function = nat44_ed_in2out_output_slow_path_fn, + .name = "nat44-ed-in2out-output-slowpath", + .vector_size = sizeof (u32), + .format_trace = format_snat_in2out_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(snat_in2out_error_strings), + .error_strings = snat_in2out_error_strings, + + .runtime_data_bytes = sizeof (snat_runtime_t), + + .n_next_nodes = SNAT_IN2OUT_N_NEXT, + + /* edit / add dispositions here */ + .next_nodes = { + [SNAT_IN2OUT_NEXT_DROP] = "error-drop", + [SNAT_IN2OUT_NEXT_LOOKUP] = "interface-output", + [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-ed-in2out-output-slowpath", + [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error", + [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass", + }, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_in2out_output_slowpath_node, + nat44_ed_in2out_output_slow_path_fn); /**************************/ /*** deterministic mode ***/ @@ -2555,7 +3947,7 @@ snat_det_in2out_node_fn (vlib_main_t * vm, u32 pkts_processed = 0; snat_main_t * sm = &snat_main; u32 now = (u32) vlib_time_now (vm); - u32 thread_index = vlib_get_thread_index (); + u32 thread_index = vm->thread_index; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; @@ -2648,8 +4040,8 @@ snat_det_in2out_node_fn (vlib_main_t * vm, dm0 = snat_det_map_by_user(sm, &ip0->src_address); if (PREDICT_FALSE(!dm0)) { - clib_warning("no match for internal host %U", - format_ip4_address, &ip0->src_address); + nat_log_info ("no match for internal host %U", + format_ip4_address, &ip0->src_address); next0 = SNAT_IN2OUT_NEXT_DROP; b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION]; goto trace0; @@ -2798,8 +4190,8 @@ snat_det_in2out_node_fn (vlib_main_t * vm, dm1 = snat_det_map_by_user(sm, &ip1->src_address); if (PREDICT_FALSE(!dm1)) { - clib_warning("no match for internal host %U", - format_ip4_address, &ip0->src_address); + nat_log_info ("no match for internal host %U", + format_ip4_address, &ip0->src_address); next1 = SNAT_IN2OUT_NEXT_DROP; b1->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION]; goto trace1; @@ -2984,8 +4376,8 @@ snat_det_in2out_node_fn (vlib_main_t * vm, dm0 = snat_det_map_by_user(sm, &ip0->src_address); if (PREDICT_FALSE(!dm0)) { - clib_warning("no match for internal host %U", - format_ip4_address, &ip0->src_address); + nat_log_info ("no match for internal host %U", + format_ip4_address, &ip0->src_address); next0 = SNAT_IN2OUT_NEXT_DROP; b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION]; goto trace00; @@ -3217,8 +4609,8 @@ u32 icmp_match_in2out_det(snat_main_t *sm, vlib_node_runtime_t *node, dm0 = snat_det_map_by_user(sm, &in_addr); if (PREDICT_FALSE(!dm0)) { - clib_warning("no match for internal host %U", - format_ip4_address, &in_addr); + nat_log_info ("no match for internal host %U", + format_ip4_address, &in_addr); if (PREDICT_FALSE(snat_not_translate_fast(sm, node, sw_if_index0, ip0, IP_PROTOCOL_ICMP, rx_fib_index0))) { @@ -3309,19 +4701,21 @@ snat_in2out_worker_handoff_fn_inline (vlib_main_t * vm, { snat_main_t *sm = &snat_main; vlib_thread_main_t *tm = vlib_get_thread_main (); - u32 n_left_from, *from, *to_next = 0; + u32 n_left_from, *from, *to_next = 0, *to_next_drop = 0; static __thread vlib_frame_queue_elt_t **handoff_queue_elt_by_worker_index; static __thread vlib_frame_queue_t **congested_handoff_queue_by_worker_index = 0; vlib_frame_queue_elt_t *hf = 0; + vlib_frame_queue_t *fq; vlib_frame_t *f = 0; int i; u32 n_left_to_next_worker = 0, *to_next_worker = 0; u32 next_worker_index = 0; u32 current_worker_index = ~0; - u32 thread_index = vlib_get_thread_index (); + u32 thread_index = vm->thread_index; u32 fq_index; u32 to_node_index; + vlib_frame_t *d = 0; ASSERT (vec_len (sm->workers)); @@ -3341,7 +4735,7 @@ snat_in2out_worker_handoff_fn_inline (vlib_main_t * vm, vec_validate (handoff_queue_elt_by_worker_index, tm->n_vlib_mains - 1); vec_validate_init_empty (congested_handoff_queue_by_worker_index, - sm->first_worker_index + sm->num_workers - 1, + tm->n_vlib_mains - 1, (vlib_frame_queue_t *) (~0)); } @@ -3376,6 +4770,26 @@ snat_in2out_worker_handoff_fn_inline (vlib_main_t * vm, if (next_worker_index != current_worker_index) { + fq = is_vlib_frame_queue_congested ( + fq_index, next_worker_index, NAT_FQ_NELTS - 2, + congested_handoff_queue_by_worker_index); + + if (fq) + { + /* if this is 1st frame */ + if (!d) + { + d = vlib_get_frame_to_node (vm, sm->error_node_index); + to_next_drop = vlib_frame_vector_args (d); + } + + to_next_drop[0] = bi0; + to_next_drop += 1; + d->n_vectors++; + b0->error = node->errors[SNAT_IN2OUT_ERROR_FQ_CONGESTED]; + goto trace0; + } + if (hf) hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker; @@ -3417,6 +4831,7 @@ snat_in2out_worker_handoff_fn_inline (vlib_main_t * vm, f->n_vectors++; } +trace0: if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && (b0->flags & VLIB_BUFFER_IS_TRACED))) { @@ -3430,6 +4845,9 @@ snat_in2out_worker_handoff_fn_inline (vlib_main_t * vm, if (f) vlib_put_frame_to_node (vm, to_node_index, f); + if (d) + vlib_put_frame_to_node (vm, sm->error_node_index, d); + if (hf) hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker; @@ -3474,6 +4892,9 @@ VLIB_REGISTER_NODE (snat_in2out_worker_handoff_node) = { .format_trace = format_snat_in2out_worker_handoff_trace, .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = ARRAY_LEN(snat_in2out_error_strings), + .error_strings = snat_in2out_error_strings, + .n_next_nodes = 1, .next_nodes = { @@ -3523,7 +4944,7 @@ is_hairpinning (snat_main_t *sm, ip4_address_t * dst_addr) } m_key.addr.as_u32 = dst_addr->as_u32; - m_key.fib_index = sm->outside_fib_index; + m_key.fib_index = 0; m_key.port = 0; m_key.protocol = 0; kv.key = m_key.as_u64; @@ -3533,16 +4954,20 @@ is_hairpinning (snat_main_t *sm, ip4_address_t * dst_addr) return 0; } -static uword -snat_hairpin_dst_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) +static inline uword +snat_hairpin_dst_fn_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, + int is_ed) { - u32 n_left_from, * from, * to_next; + u32 n_left_from, * from, * to_next, stats_node_index; snat_in2out_next_t next_index; u32 pkts_processed = 0; snat_main_t * sm = &snat_main; + stats_node_index = is_ed ? nat44_ed_hairpin_dst_node.index : + snat_hairpin_dst_node.index; + from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; next_index = node->cached_next_index; @@ -3584,17 +5009,20 @@ snat_hairpin_dst_fn (vlib_main_t * vm, udp_header_t * udp0 = ip4_next_header (ip0); tcp_header_t * tcp0 = (tcp_header_t *) udp0; - snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0); + snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0, is_ed); } else if (proto0 == SNAT_PROTOCOL_ICMP) { icmp46_header_t * icmp0 = ip4_next_header (ip0); - snat_icmp_hairpinning (sm, b0, ip0, icmp0); + snat_icmp_hairpinning (sm, b0, ip0, icmp0, is_ed); } else { - snat_hairpinning_unknown_proto (sm, b0, ip0); + if (is_ed) + nat44_ed_hairpinning_unknown_proto (sm, b0, ip0); + else + nat_hairpinning_sm_unknown_proto (sm, b0, ip0); } vnet_buffer (b0)->snat.flags = SNAT_FLAG_HAIRPINNING; @@ -3611,12 +5039,20 @@ snat_hairpin_dst_fn (vlib_main_t * vm, vlib_put_next_frame (vm, node, next_index, n_left_to_next); } - vlib_node_increment_counter (vm, snat_hairpin_dst_node.index, + vlib_node_increment_counter (vm, stats_node_index, SNAT_IN2OUT_ERROR_IN2OUT_PACKETS, pkts_processed); return frame->n_vectors; } +static uword +snat_hairpin_dst_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return snat_hairpin_dst_fn_inline (vm, node, frame, 0); +} + VLIB_REGISTER_NODE (snat_hairpin_dst_node) = { .function = snat_hairpin_dst_fn, .name = "nat44-hairpin-dst", @@ -3635,15 +5071,44 @@ VLIB_NODE_FUNCTION_MULTIARCH (snat_hairpin_dst_node, snat_hairpin_dst_fn); static uword -snat_hairpin_src_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) +nat44_ed_hairpin_dst_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) { - u32 n_left_from, * from, * to_next; + return snat_hairpin_dst_fn_inline (vm, node, frame, 1); +} + +VLIB_REGISTER_NODE (nat44_ed_hairpin_dst_node) = { + .function = nat44_ed_hairpin_dst_fn, + .name = "nat44-ed-hairpin-dst", + .vector_size = sizeof (u32), + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = ARRAY_LEN(snat_in2out_error_strings), + .error_strings = snat_in2out_error_strings, + .n_next_nodes = 2, + .next_nodes = { + [SNAT_IN2OUT_NEXT_DROP] = "error-drop", + [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup", + }, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_hairpin_dst_node, + nat44_ed_hairpin_dst_fn); + +static inline uword +snat_hairpin_src_fn_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, + int is_ed) +{ + u32 n_left_from, * from, * to_next, stats_node_index; snat_in2out_next_t next_index; u32 pkts_processed = 0; snat_main_t *sm = &snat_main; + stats_node_index = is_ed ? nat44_ed_hairpin_src_node.index : + snat_hairpin_src_node.index; + from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; next_index = node->cached_next_index; @@ -3703,12 +5168,20 @@ snat_hairpin_src_fn (vlib_main_t * vm, vlib_put_next_frame (vm, node, next_index, n_left_to_next); } - vlib_node_increment_counter (vm, snat_hairpin_src_node.index, + vlib_node_increment_counter (vm, stats_node_index, SNAT_IN2OUT_ERROR_IN2OUT_PACKETS, pkts_processed); return frame->n_vectors; } +static uword +snat_hairpin_src_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return snat_hairpin_src_fn_inline (vm, node, frame, 0); +} + VLIB_REGISTER_NODE (snat_hairpin_src_node) = { .function = snat_hairpin_src_fn, .name = "nat44-hairpin-src", @@ -3728,6 +5201,33 @@ VLIB_REGISTER_NODE (snat_hairpin_src_node) = { VLIB_NODE_FUNCTION_MULTIARCH (snat_hairpin_src_node, snat_hairpin_src_fn); +static uword +nat44_ed_hairpin_src_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return snat_hairpin_src_fn_inline (vm, node, frame, 1); +} + +VLIB_REGISTER_NODE (nat44_ed_hairpin_src_node) = { + .function = nat44_ed_hairpin_src_fn, + .name = "nat44-ed-hairpin-src", + .vector_size = sizeof (u32), + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = ARRAY_LEN(snat_in2out_error_strings), + .error_strings = snat_in2out_error_strings, + .n_next_nodes = SNAT_HAIRPIN_SRC_N_NEXT, + .next_nodes = { + [SNAT_HAIRPIN_SRC_NEXT_DROP] = "error-drop", + [SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT] = "nat44-ed-in2out-output", + [SNAT_HAIRPIN_SRC_NEXT_INTERFACE_OUTPUT] = "interface-output", + [SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT_WH] = "nat44-in2out-output-worker-handoff", + }, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_hairpin_src_node, + nat44_ed_hairpin_src_fn); + static uword snat_in2out_fast_static_map_fn (vlib_main_t * vm, vlib_node_runtime_t * node, @@ -3815,7 +5315,7 @@ snat_in2out_fast_static_map_fn (vlib_main_t * vm, key0.port = udp0->src_port; key0.fib_index = rx_fib_index0; - if (snat_static_mapping_match(sm, key0, &sm0, 0, 0, 0)) + if (snat_static_mapping_match(sm, key0, &sm0, 0, 0, 0, 0)) { b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION]; next0= SNAT_IN2OUT_NEXT_DROP; @@ -3870,7 +5370,7 @@ snat_in2out_fast_static_map_fn (vlib_main_t * vm, } /* Hairpinning */ - snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0); + snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0, 0); trace0: if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)