X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fnat%2Fin2out.c;h=8bdb792442a2c5a635bdd554fc1aa86d234873c8;hb=34931eb47;hp=bb1863937a17548d617ebebf09c2716f3cb39e3f;hpb=a894434e30149338f2aa36773cf80ec1cf15a34f;p=vpp.git diff --git a/src/plugins/nat/in2out.c b/src/plugins/nat/in2out.c old mode 100644 new mode 100755 index bb1863937a1..8bdb792442a --- a/src/plugins/nat/in2out.c +++ b/src/plugins/nat/in2out.c @@ -12,188 +12,116 @@ * See the License for the specific language governing permissions and * limitations under the License. */ +/** + * @file + * @brief NAT44 inside to outside network translation + */ #include #include #include -#include #include #include #include #include #include -#include +#include +#include +#include +#include #include #include #include -typedef struct { +typedef struct +{ u32 sw_if_index; u32 next_index; u32 session_index; u32 is_slow_path; } snat_in2out_trace_t; -typedef struct { - u32 next_worker_index; - u8 do_handoff; -} snat_in2out_worker_handoff_trace_t; - /* packet trace format function */ -static u8 * format_snat_in2out_trace (u8 * s, va_list * args) +static u8 * +format_snat_in2out_trace (u8 * s, va_list * args) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); - snat_in2out_trace_t * t = va_arg (*args, snat_in2out_trace_t *); - char * tag; + snat_in2out_trace_t *t = va_arg (*args, snat_in2out_trace_t *); + char *tag; tag = t->is_slow_path ? "NAT44_IN2OUT_SLOW_PATH" : "NAT44_IN2OUT_FAST_PATH"; s = format (s, "%s: sw_if_index %d, next index %d, session %d", tag, - t->sw_if_index, t->next_index, t->session_index); + t->sw_if_index, t->next_index, t->session_index); return s; } -static u8 * format_snat_in2out_fast_trace (u8 * s, va_list * args) +static u8 * +format_snat_in2out_fast_trace (u8 * s, va_list * args) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); - snat_in2out_trace_t * t = va_arg (*args, snat_in2out_trace_t *); + snat_in2out_trace_t *t = va_arg (*args, snat_in2out_trace_t *); s = format (s, "NAT44_IN2OUT_FAST: sw_if_index %d, next index %d", - t->sw_if_index, t->next_index); - - return s; -} - -static u8 * format_snat_in2out_worker_handoff_trace (u8 * s, va_list * args) -{ - CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); - CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); - snat_in2out_worker_handoff_trace_t * t = - va_arg (*args, snat_in2out_worker_handoff_trace_t *); - char * m; - - m = t->do_handoff ? "next worker" : "same worker"; - s = format (s, "NAT44_IN2OUT_WORKER_HANDOFF: %s %d", m, t->next_worker_index); + t->sw_if_index, t->next_index); return s; } -vlib_node_registration_t snat_in2out_node; -vlib_node_registration_t snat_in2out_slowpath_node; -vlib_node_registration_t snat_in2out_fast_node; -vlib_node_registration_t snat_in2out_worker_handoff_node; -vlib_node_registration_t snat_det_in2out_node; -vlib_node_registration_t snat_in2out_output_node; -vlib_node_registration_t snat_in2out_output_slowpath_node; -vlib_node_registration_t snat_in2out_output_worker_handoff_node; -vlib_node_registration_t snat_hairpin_dst_node; -vlib_node_registration_t snat_hairpin_src_node; - - #define foreach_snat_in2out_error \ -_(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \ -_(IN2OUT_PACKETS, "Good in2out packets processed") \ -_(OUT_OF_PORTS, "Out of ports") \ -_(BAD_OUTSIDE_FIB, "Outside VRF ID not found") \ +_(UNSUPPORTED_PROTOCOL, "unsupported protocol") \ +_(IN2OUT_PACKETS, "good in2out packets processed") \ +_(OUT_OF_PORTS, "out of ports") \ +_(BAD_OUTSIDE_FIB, "outside VRF ID not found") \ _(BAD_ICMP_TYPE, "unsupported ICMP type") \ -_(NO_TRANSLATION, "No translation") - -typedef enum { +_(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")\ +_(TCP_PACKETS, "TCP packets") \ +_(UDP_PACKETS, "UDP packets") \ +_(ICMP_PACKETS, "ICMP packets") \ +_(OTHER_PACKETS, "other protocol packets") \ +_(FRAGMENTS, "fragments") \ +_(CACHED_FRAGMENTS, "cached fragments") \ +_(PROCESSED_FRAGMENTS, "processed fragments") + +typedef enum +{ #define _(sym,str) SNAT_IN2OUT_ERROR_##sym, foreach_snat_in2out_error #undef _ - SNAT_IN2OUT_N_ERROR, + SNAT_IN2OUT_N_ERROR, } snat_in2out_error_t; -static char * snat_in2out_error_strings[] = { +static char *snat_in2out_error_strings[] = { #define _(sym,string) string, foreach_snat_in2out_error #undef _ }; -typedef enum { +typedef enum +{ SNAT_IN2OUT_NEXT_LOOKUP, SNAT_IN2OUT_NEXT_DROP, SNAT_IN2OUT_NEXT_ICMP_ERROR, SNAT_IN2OUT_NEXT_SLOW_PATH, + SNAT_IN2OUT_NEXT_REASS, SNAT_IN2OUT_N_NEXT, } snat_in2out_next_t; -typedef enum { - SNAT_HAIRPIN_SRC_NEXT_DROP, - SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT, - SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT_WH, - SNAT_HAIRPIN_SRC_NEXT_INTERFACE_OUTPUT, - SNAT_HAIRPIN_SRC_N_NEXT, -} snat_hairpin_next_t; - -/** - * @brief Check if packet should be translated - * - * Packets aimed at outside interface and external addresss with active session - * should be translated. - * - * @param sm NAT main - * @param rt NAT runtime data - * @param sw_if_index0 index of the inside interface - * @param ip0 IPv4 header - * @param proto0 NAT protocol - * @param rx_fib_index0 RX FIB index - * - * @returns 0 if packet should be translated otherwise 1 - */ -static inline int -snat_not_translate_fast (snat_main_t * sm, vlib_node_runtime_t *node, - u32 sw_if_index0, ip4_header_t * ip0, u32 proto0, - u32 rx_fib_index0) -{ - 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, - }, - }; - - /* Don't NAT packet aimed at the intfc address */ - if (PREDICT_FALSE(is_interface_addr(sm, node, sw_if_index0, - ip0->dst_address.as_u32))) - return 1; - - fei = fib_table_lookup (rx_fib_index0, &pfx); - if (FIB_NODE_INDEX_INVALID != fei) - { - 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); - } - snat_interface_t *i; - pool_foreach (i, sm->interfaces, - ({ - /* NAT packet aimed at outside interface */ - if ((i->is_inside == 0) && (sw_if_index == i->sw_if_index)) - return 0; - })); - } - - return 1; -} - static inline int -snat_not_translate (snat_main_t * sm, vlib_node_runtime_t *node, - u32 sw_if_index0, ip4_header_t * ip0, u32 proto0, - u32 rx_fib_index0) +snat_not_translate (snat_main_t * sm, vlib_node_runtime_t * node, + u32 sw_if_index0, ip4_header_t * ip0, u32 proto0, + u32 rx_fib_index0, u32 thread_index) { - udp_header_t * udp0 = ip4_next_header (ip0); + udp_header_t *udp0 = ip4_next_header (ip0); snat_session_key_t key0, sm0; clib_bihash_kv_8_8_t kv0, value0; @@ -205,260 +133,271 @@ snat_not_translate (snat_main_t * sm, vlib_node_runtime_t *node, /* NAT packet aimed at external address if */ /* has active sessions */ - if (clib_bihash_search_8_8 (&sm->out2in, &kv0, &value0)) + if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].out2in, &kv0, + &value0)) { /* or is static mappings */ - if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0)) - return 0; + if (!snat_static_mapping_match (sm, key0, &sm0, 1, 0, 0, 0, 0, 0)) + return 0; } else return 0; - return snat_not_translate_fast(sm, node, sw_if_index0, ip0, proto0, - rx_fib_index0); + if (sm->forwarding_enabled) + return 1; + + return snat_not_translate_fast (sm, node, sw_if_index0, ip0, proto0, + rx_fib_index0); } -static u32 slow_path (snat_main_t *sm, vlib_buffer_t *b0, - ip4_header_t * ip0, - u32 rx_fib_index0, - snat_session_key_t * key0, - snat_session_t ** sessionp, - vlib_node_runtime_t * node, - u32 next0, - u32 thread_index) +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_user_t *u; - snat_user_key_t user_key; - snat_session_t *s; + snat_session_key_t key0; clib_bihash_kv_8_8_t kv0, value0; - u32 oldest_per_user_translation_list_index; - dlist_elt_t * oldest_per_user_translation_list_elt; - dlist_elt_t * per_user_translation_list_elt; - dlist_elt_t * per_user_list_head_elt; - u32 session_index; - snat_session_key_t key1; - u32 address_index = ~0; - u32 outside_fib_index; - uword * p; - snat_worker_key_t worker_by_out_key; + 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; - p = hash_get (sm->ip4_main->fib_index_by_table_id, sm->outside_vrf_id); - if (! p) + /* 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)) { - b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_OUTSIDE_FIB]; - return SNAT_IN2OUT_NEXT_DROP; + /* hairpinning */ + /* *INDENT-OFF* */ + pool_foreach (i, sm->output_feature_interfaces, + ({ + if ((nat_interface_is_inside(i)) && (sw_if_index == i->sw_if_index)) + return 0; + })); + /* *INDENT-ON* */ + return 1; } - outside_fib_index = p[0]; - key1.protocol = key0->protocol; - user_key.addr = ip0->src_address; - user_key.fib_index = rx_fib_index0; - kv0.key = user_key.as_u64; + return 0; +} - /* Ever heard of the "user" = src ip4 address before? */ - if (clib_bihash_search_8_8 (&sm->user_hash, &kv0, &value0)) +#ifndef CLIB_MARCH_VARIANT +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) { - /* no, make a new one */ - pool_get (sm->per_thread_data[thread_index].users, u); - memset (u, 0, sizeof (*u)); - u->addr = ip0->src_address; - u->fib_index = rx_fib_index0; - - pool_get (sm->per_thread_data[thread_index].list_pool, per_user_list_head_elt); + 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 (ctx->thread_index, + s->in2out.addr.as_u32, + s->out2in.addr.as_u32, + s->in2out.protocol, + s->in2out.port, + s->out2in.port, + s->in2out.fib_index); + + nat_syslog_nat44_apmdel (s->user_index, s->in2out.fib_index, + &s->in2out.addr, s->in2out.port, + &s->out2in.addr, s->out2in.port, + s->in2out.protocol); + + nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr, + s->ext_host_port, s->out2in.protocol, s->out2in.fib_index, + ctx->thread_index); + + if (!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; + } - u->sessions_per_user_list_head_index = per_user_list_head_elt - - sm->per_thread_data[thread_index].list_pool; + return 0; +} +#endif + +static u32 +slow_path (snat_main_t * sm, vlib_buffer_t * b0, + ip4_header_t * ip0, + u32 rx_fib_index0, + snat_session_key_t * key0, + snat_session_t ** sessionp, + vlib_node_runtime_t * node, u32 next0, u32 thread_index, f64 now) +{ + snat_user_t *u; + snat_session_t *s = 0; + clib_bihash_kv_8_8_t kv0; + snat_session_key_t key1; + 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; + u8 identity_nat; + 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; - clib_dlist_init (sm->per_thread_data[thread_index].list_pool, - u->sessions_per_user_list_head_index); + if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index))) + { + b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_SESSIONS_EXCEEDED]; + nat_ipfix_logging_max_sessions (thread_index, sm->max_translations); + nat_log_notice ("maximum sessions exceeded"); + return SNAT_IN2OUT_NEXT_DROP; + } - kv0.value = u - sm->per_thread_data[thread_index].users; + key1.protocol = key0->protocol; - /* add user */ - clib_bihash_add_del_8_8 (&sm->user_hash, &kv0, 1 /* is_add */); + /* First try to match static mapping by local address and port */ + if (snat_static_mapping_match + (sm, *key0, &key1, 0, 0, 0, 0, 0, &identity_nat)) + { + /* Try to create dynamic translation */ + if (snat_alloc_outside_address_and_port (sm->addresses, rx_fib_index0, + thread_index, &key1, + sm->port_per_thread, + sm->per_thread_data + [thread_index].snat_thread_index)) + { + b0->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS]; + return SNAT_IN2OUT_NEXT_DROP; + } } else { - u = pool_elt_at_index (sm->per_thread_data[thread_index].users, - value0.value); + if (PREDICT_FALSE (identity_nat)) + { + *sessionp = s; + return next0; + } + + is_sm = 1; } - /* Over quota? Recycle the least recently used dynamic translation */ - if (u->nsessions >= sm->max_translations_per_user) + u = nat_user_get_or_create (sm, &ip0->src_address, rx_fib_index0, + thread_index); + if (!u) { - /* Remove the oldest dynamic translation */ - do { - oldest_per_user_translation_list_index = - clib_dlist_remove_head (sm->per_thread_data[thread_index].list_pool, - u->sessions_per_user_list_head_index); - - ASSERT (oldest_per_user_translation_list_index != ~0); - - /* add it back to the end of the LRU list */ - clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool, - u->sessions_per_user_list_head_index, - oldest_per_user_translation_list_index); - /* Get the list element */ - oldest_per_user_translation_list_elt = - pool_elt_at_index (sm->per_thread_data[thread_index].list_pool, - oldest_per_user_translation_list_index); - - /* Get the session index from the list element */ - session_index = oldest_per_user_translation_list_elt->value; - - /* Get the session */ - s = pool_elt_at_index (sm->per_thread_data[thread_index].sessions, - session_index); - } while (snat_is_session_static (s)); - - if (snat_is_unk_proto_session (s)) - { - clib_bihash_kv_16_8_t up_kv; - snat_unk_proto_ses_key_t key; - - /* Remove from lookup tables */ - key.l_addr = s->in2out.addr; - key.r_addr = s->ext_host_addr; - key.fib_index = s->in2out.fib_index; - key.proto = s->in2out.port; - up_kv.key[0] = key.as_u64[0]; - up_kv.key[1] = key.as_u64[1]; - if (clib_bihash_add_del_16_8 (&sm->in2out_unk_proto, &up_kv, 0)) - clib_warning ("in2out key del failed"); - - key.l_addr = s->out2in.addr; - key.fib_index = s->out2in.fib_index; - up_kv.key[0] = key.as_u64[0]; - up_kv.key[1] = key.as_u64[1]; - if (clib_bihash_add_del_16_8 (&sm->out2in_unk_proto, &up_kv, 0)) - clib_warning ("out2in key del failed"); - } - else - { - /* Remove in2out, out2in keys */ - kv0.key = s->in2out.as_u64; - if (clib_bihash_add_del_8_8 (&sm->in2out, &kv0, 0 /* is_add */)) - clib_warning ("in2out key delete failed"); - kv0.key = s->out2in.as_u64; - if (clib_bihash_add_del_8_8 (&sm->out2in, &kv0, 0 /* is_add */)) - clib_warning ("out2in key delete failed"); - - /* log NAT event */ - 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); - - snat_free_outside_address_and_port - (sm, &s->out2in, s->outside_address_index); - } - s->outside_address_index = ~0; - - if (snat_alloc_outside_address_and_port (sm, rx_fib_index0, thread_index, - &key1, &address_index)) - { - ASSERT(0); - - b0->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS]; - return SNAT_IN2OUT_NEXT_DROP; - } - s->outside_address_index = address_index; + nat_log_warn ("create NAT user failed"); + return SNAT_IN2OUT_NEXT_DROP; } - else + + s = nat_session_alloc_or_recycle (sm, u, thread_index, now); + if (!s) { - u8 static_mapping = 1; + nat44_delete_user_with_no_session (sm, u, thread_index); + nat_log_warn ("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)) + if (is_sm) + s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; + user_session_increment (sm, u, is_sm); + s->in2out = *key0; + s->out2in = key1; + s->out2in.protocol = key0->protocol; + 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: + /* *INDENT-OFF* */ + vec_foreach (outside_fib, sm->outside_fibs) { - static_mapping = 0; - /* Try to create dynamic translation */ - if (snat_alloc_outside_address_and_port (sm, rx_fib_index0, - thread_index, &key1, - &address_index)) + fei = fib_table_lookup (outside_fib->fib_index, &pfx); + if (FIB_NODE_INDEX_INVALID != fei) { - b0->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS]; - return SNAT_IN2OUT_NEXT_DROP; + if (fib_entry_get_resolving_interface (fei) != ~0) + { + s->out2in.fib_index = outside_fib->fib_index; + break; + } } } - - /* Create a new session */ - pool_get (sm->per_thread_data[thread_index].sessions, s); - memset (s, 0, sizeof (*s)); - - s->outside_address_index = address_index; - - if (static_mapping) - { - u->nstaticsessions++; - s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; - } - else - { - u->nsessions++; - } - - /* Create list elts */ - pool_get (sm->per_thread_data[thread_index].list_pool, - per_user_translation_list_elt); - clib_dlist_init (sm->per_thread_data[thread_index].list_pool, - per_user_translation_list_elt - - sm->per_thread_data[thread_index].list_pool); - - per_user_translation_list_elt->value = - s - sm->per_thread_data[thread_index].sessions; - s->per_user_index = per_user_translation_list_elt - - sm->per_thread_data[thread_index].list_pool; - s->per_user_list_head_index = u->sessions_per_user_list_head_index; - - clib_dlist_addtail (sm->per_thread_data[thread_index].list_pool, - s->per_user_list_head_index, - per_user_translation_list_elt - - sm->per_thread_data[thread_index].list_pool); - } - - s->in2out = *key0; - s->out2in = key1; - s->out2in.protocol = key0->protocol; - s->out2in.fib_index = outside_fib_index; + /* *INDENT-ON* */ + 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->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->out2in, &kv0, 1 /* is_add */)) - clib_warning ("out2in key add failed"); - - /* Add to translated packets worker lookup */ - worker_by_out_key.addr = s->out2in.addr; - worker_by_out_key.port = s->out2in.port; - worker_by_out_key.fib_index = s->out2in.fib_index; - kv0.key = worker_by_out_key.as_u64; - kv0.value = thread_index; - clib_bihash_add_del_8_8 (&sm->worker_by_out, &kv0, 1); + 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, - s->out2in.addr.as_u32, - s->in2out.protocol, - s->in2out.port, - s->out2in.port, - s->in2out.fib_index); + snat_ipfix_logging_nat44_ses_create (thread_index, + s->in2out.addr.as_u32, + s->out2in.addr.as_u32, + s->in2out.protocol, + s->in2out.port, + s->out2in.port, s->in2out.fib_index); + + nat_syslog_nat44_apmadd (s->user_index, s->in2out.fib_index, + &s->in2out.addr, s->in2out.port, &s->out2in.addr, + s->out2in.port, s->in2out.protocol); + + nat_ha_sadd (&s->in2out.addr, s->in2out.port, &s->out2in.addr, + s->out2in.port, &s->ext_host_addr, s->ext_host_port, + &s->ext_host_nat_addr, s->ext_host_nat_port, + s->in2out.protocol, s->in2out.fib_index, s->flags, + thread_index, 0); + return next0; } +#ifndef CLIB_MARCH_VARIANT static_always_inline -snat_in2out_error_t icmp_get_key(ip4_header_t *ip0, - snat_session_key_t *p_key0) + snat_in2out_error_t icmp_get_key (ip4_header_t * ip0, + snat_session_key_t * p_key0) { icmp46_header_t *icmp0; snat_session_key_t key0; @@ -468,7 +407,7 @@ snat_in2out_error_t icmp_get_key(ip4_header_t *ip0, icmp46_header_t *inner_icmp0; icmp0 = (icmp46_header_t *) ip4_next_header (ip0); - echo0 = (icmp_echo_header_t *)(icmp0+1); + echo0 = (icmp_echo_header_t *) (icmp0 + 1); if (!icmp_is_error_message (icmp0)) { @@ -478,27 +417,27 @@ snat_in2out_error_t icmp_get_key(ip4_header_t *ip0, } else { - inner_ip0 = (ip4_header_t *)(echo0+1); + inner_ip0 = (ip4_header_t *) (echo0 + 1); l4_header = ip4_next_header (inner_ip0); key0.protocol = ip_proto_to_snat_proto (inner_ip0->protocol); key0.addr = inner_ip0->dst_address; switch (key0.protocol) - { - case SNAT_PROTOCOL_ICMP: - inner_icmp0 = (icmp46_header_t*)l4_header; - inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1); - key0.port = inner_echo0->identifier; - break; - case SNAT_PROTOCOL_UDP: - case SNAT_PROTOCOL_TCP: - key0.port = ((tcp_udp_header_t*)l4_header)->dst_port; - break; - default: - return SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL; - } + { + case SNAT_PROTOCOL_ICMP: + inner_icmp0 = (icmp46_header_t *) l4_header; + inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1); + key0.port = inner_echo0->identifier; + break; + case SNAT_PROTOCOL_UDP: + case SNAT_PROTOCOL_TCP: + key0.port = ((tcp_udp_header_t *) l4_header)->dst_port; + break; + default: + return SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL; + } } *p_key0 = key0; - return -1; /* success */ + return -1; /* success */ } /** @@ -515,12 +454,13 @@ snat_in2out_error_t icmp_get_key(ip4_header_t *ip0, * @param d optional parameter * @param e optional parameter */ -u32 icmp_match_in2out_slow(snat_main_t *sm, vlib_node_runtime_t *node, - u32 thread_index, vlib_buffer_t *b0, u8 *p_proto, - snat_session_key_t *p_value, - u8 *p_dont_translate, void *d, void *e) +u32 +icmp_match_in2out_slow (snat_main_t * sm, vlib_node_runtime_t * node, + u32 thread_index, vlib_buffer_t * b0, + ip4_header_t * ip0, u8 * p_proto, + snat_session_key_t * p_value, + u8 * p_dont_translate, void *d, void *e) { - ip4_header_t *ip0; icmp46_header_t *icmp0; u32 sw_if_index0; u32 rx_fib_index0; @@ -530,15 +470,9 @@ u32 icmp_match_in2out_slow(snat_main_t *sm, vlib_node_runtime_t *node, clib_bihash_kv_8_8_t kv0, value0; u32 next0 = ~0; int err; - u32 iph_offset0 = 0; - if (PREDICT_FALSE(vnet_buffer(b0)->sw_if_index[VLIB_TX] != ~0)) - { - iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length; - } - ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + iph_offset0); icmp0 = (icmp46_header_t *) ip4_next_header (ip0); - sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0); err = icmp_get_key (ip0, &key0); @@ -552,42 +486,66 @@ u32 icmp_match_in2out_slow(snat_main_t *sm, vlib_node_runtime_t *node, kv0.key = key0.as_u64; - if (clib_bihash_search_8_8 (&sm->in2out, &kv0, &value0)) + 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) && - vnet_buffer(b0)->sw_if_index[VLIB_TX] == ~0)) - { - dont_translate = 1; - goto out; - } + if (vnet_buffer (b0)->sw_if_index[VLIB_TX] != ~0) + { + 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))) - { - b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE]; - next0 = SNAT_IN2OUT_NEXT_DROP; - goto out; - } + if (PREDICT_FALSE (icmp_is_error_message (icmp0))) + { + b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE]; + next0 = SNAT_IN2OUT_NEXT_DROP; + 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; + goto out; + + if (!s0) + { + dont_translate = 1; + goto out; + } } else { - if (PREDICT_FALSE(icmp0->type != ICMP4_echo_request && - icmp0->type != ICMP4_echo_reply && - !icmp_is_error_message (icmp0))) - { - b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE]; - next0 = SNAT_IN2OUT_NEXT_DROP; - goto out; - } + if (PREDICT_FALSE (icmp0->type != ICMP4_echo_request && + icmp0->type != ICMP4_echo_reply && + !icmp_is_error_message (icmp0))) + { + b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE]; + next0 = SNAT_IN2OUT_NEXT_DROP; + goto out; + } s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions, - value0.value); + value0.value); } out: @@ -596,10 +554,12 @@ out: *p_value = s0->out2in; *p_dont_translate = dont_translate; if (d) - *(snat_session_t**)d = s0; + *(snat_session_t **) d = s0; return next0; } +#endif +#ifndef CLIB_MARCH_VARIANT /** * Get address and port values to be used for ICMP packet translation * @@ -613,12 +573,13 @@ out: * @param d optional parameter * @param e optional parameter */ -u32 icmp_match_in2out_fast(snat_main_t *sm, vlib_node_runtime_t *node, - u32 thread_index, vlib_buffer_t *b0, u8 *p_proto, - snat_session_key_t *p_value, - u8 *p_dont_translate, void *d, void *e) +u32 +icmp_match_in2out_fast (snat_main_t * sm, vlib_node_runtime_t * node, + u32 thread_index, vlib_buffer_t * b0, + ip4_header_t * ip0, u8 * p_proto, + snat_session_key_t * p_value, + u8 * p_dont_translate, void *d, void *e) { - ip4_header_t *ip0; icmp46_header_t *icmp0; u32 sw_if_index0; u32 rx_fib_index0; @@ -629,9 +590,8 @@ u32 icmp_match_in2out_fast(snat_main_t *sm, vlib_node_runtime_t *node, u32 next0 = ~0; int err; - ip0 = vlib_buffer_get_current (b0); icmp0 = (icmp46_header_t *) ip4_next_header (ip0); - sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0); err = icmp_get_key (ip0, &key0); @@ -643,29 +603,31 @@ 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)) + if (snat_static_mapping_match + (sm, key0, &sm0, 0, &is_addr_only, 0, 0, 0, 0)) { - if (PREDICT_FALSE(snat_not_translate_fast(sm, node, sw_if_index0, ip0, - IP_PROTOCOL_ICMP, rx_fib_index0))) - { - dont_translate = 1; - goto out; - } + if (PREDICT_FALSE (snat_not_translate_fast (sm, node, sw_if_index0, ip0, + IP_PROTOCOL_ICMP, + rx_fib_index0))) + { + dont_translate = 1; + goto out; + } if (icmp_is_error_message (icmp0)) - { - next0 = SNAT_IN2OUT_NEXT_DROP; - goto out; - } + { + next0 = SNAT_IN2OUT_NEXT_DROP; + goto out; + } b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION]; next0 = SNAT_IN2OUT_NEXT_DROP; goto out; } - if (PREDICT_FALSE(icmp0->type != ICMP4_echo_request && - (icmp0->type != ICMP4_echo_reply || !is_addr_only) && - !icmp_is_error_message (icmp0))) + if (PREDICT_FALSE (icmp0->type != ICMP4_echo_request && + (icmp0->type != ICMP4_echo_reply || !is_addr_only) && + !icmp_is_error_message (icmp0))) { b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE]; next0 = SNAT_IN2OUT_NEXT_DROP; @@ -679,18 +641,18 @@ out2: *p_dont_translate = dont_translate; return next0; } - -static inline u32 icmp_in2out (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, - u32 thread_index, - void *d, - void *e) +#endif + +#ifndef CLIB_MARCH_VARIANT +u32 +icmp_in2out (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, u32 thread_index, void *d, void *e) { snat_session_key_t sm0; u8 protocol; @@ -701,687 +663,220 @@ static inline u32 icmp_in2out (snat_main_t *sm, u8 dont_translate; u32 new_addr0, old_addr0; u16 old_id0, new_id0; + u16 old_checksum0, new_checksum0; ip_csum_t sum0; u16 checksum0; u32 next0_tmp; - echo0 = (icmp_echo_header_t *)(icmp0+1); + echo0 = (icmp_echo_header_t *) (icmp0 + 1); - next0_tmp = sm->icmp_match_in2out_cb(sm, node, thread_index, b0, - &protocol, &sm0, &dont_translate, d, e); + next0_tmp = sm->icmp_match_in2out_cb (sm, node, thread_index, b0, ip0, + &protocol, &sm0, &dont_translate, d, + e); if (next0_tmp != ~0) next0 = next0_tmp; if (next0 == SNAT_IN2OUT_NEXT_DROP || dont_translate) goto out; - sum0 = ip_incremental_checksum (0, icmp0, - ntohs(ip0->length) - ip4_header_bytes (ip0)); - checksum0 = ~ip_csum_fold (sum0); - if (PREDICT_FALSE(checksum0 != 0 && checksum0 != 0xffff)) + if (PREDICT_TRUE (!ip4_is_fragment (ip0))) { - next0 = SNAT_IN2OUT_NEXT_DROP; - goto out; + sum0 = ip_incremental_checksum_buffer (sm->vlib_main, b0, (u8 *) icmp0 - + (u8 *) + vlib_buffer_get_current (b0), + ntohs (ip0->length) - + ip4_header_bytes (ip0), 0); + checksum0 = ~ip_csum_fold (sum0); + if (PREDICT_FALSE (checksum0 != 0 && checksum0 != 0xffff)) + { + next0 = SNAT_IN2OUT_NEXT_DROP; + goto out; + } } old_addr0 = ip0->src_address.as_u32; new_addr0 = ip0->src_address.as_u32 = sm0.addr.as_u32; - if (vnet_buffer(b0)->sw_if_index[VLIB_TX] == ~0) - vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index; sum0 = ip0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - src_address /* changed member */); + 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; - if (PREDICT_FALSE(new_id0 != echo0->identifier)) - { - old_id0 = echo0->identifier; - new_id0 = sm0.port; - echo0->identifier = new_id0; - - sum0 = icmp0->checksum; - sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t, - identifier); - icmp0->checksum = ip_csum_fold (sum0); - } + if (PREDICT_FALSE (new_id0 != echo0->identifier)) + { + old_id0 = echo0->identifier; + new_id0 = sm0.port; + echo0->identifier = new_id0; + + sum0 = icmp0->checksum; + sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t, + identifier); + icmp0->checksum = ip_csum_fold (sum0); + } } else { - inner_ip0 = (ip4_header_t *)(echo0+1); + inner_ip0 = (ip4_header_t *) (echo0 + 1); l4_header = ip4_next_header (inner_ip0); if (!ip4_header_checksum_is_valid (inner_ip0)) - { - next0 = SNAT_IN2OUT_NEXT_DROP; - goto out; - } + { + next0 = SNAT_IN2OUT_NEXT_DROP; + goto out; + } + /* update inner destination IP address */ old_addr0 = inner_ip0->dst_address.as_u32; inner_ip0->dst_address = sm0.addr; new_addr0 = inner_ip0->dst_address.as_u32; - sum0 = icmp0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address /* changed member */); + dst_address /* changed member */ ); + icmp0->checksum = ip_csum_fold (sum0); + + /* update inner IP header checksum */ + old_checksum0 = inner_ip0->checksum; + sum0 = inner_ip0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, + dst_address /* changed member */ ); + inner_ip0->checksum = ip_csum_fold (sum0); + new_checksum0 = inner_ip0->checksum; + sum0 = icmp0->checksum; + sum0 = ip_csum_update (sum0, old_checksum0, new_checksum0, ip4_header_t, + checksum); icmp0->checksum = ip_csum_fold (sum0); switch (protocol) - { - case SNAT_PROTOCOL_ICMP: - inner_icmp0 = (icmp46_header_t*)l4_header; - inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1); - - old_id0 = inner_echo0->identifier; - new_id0 = sm0.port; - inner_echo0->identifier = new_id0; - - sum0 = icmp0->checksum; - sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t, - identifier); - icmp0->checksum = ip_csum_fold (sum0); - break; - case SNAT_PROTOCOL_UDP: - case SNAT_PROTOCOL_TCP: - old_id0 = ((tcp_udp_header_t*)l4_header)->dst_port; - new_id0 = sm0.port; - ((tcp_udp_header_t*)l4_header)->dst_port = new_id0; - - sum0 = icmp0->checksum; - sum0 = ip_csum_update (sum0, old_id0, new_id0, tcp_udp_header_t, - dst_port); - icmp0->checksum = ip_csum_fold (sum0); - break; - default: - ASSERT(0); - } + { + case SNAT_PROTOCOL_ICMP: + inner_icmp0 = (icmp46_header_t *) l4_header; + inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1); + + old_id0 = inner_echo0->identifier; + new_id0 = sm0.port; + inner_echo0->identifier = new_id0; + + sum0 = icmp0->checksum; + sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t, + identifier); + icmp0->checksum = ip_csum_fold (sum0); + break; + case SNAT_PROTOCOL_UDP: + case SNAT_PROTOCOL_TCP: + old_id0 = ((tcp_udp_header_t *) l4_header)->dst_port; + new_id0 = sm0.port; + ((tcp_udp_header_t *) l4_header)->dst_port = new_id0; + + sum0 = icmp0->checksum; + sum0 = ip_csum_update (sum0, old_id0, new_id0, tcp_udp_header_t, + dst_port); + icmp0->checksum = ip_csum_fold (sum0); + break; + default: + ASSERT (0); + } + } + + if (vnet_buffer (b0)->sw_if_index[VLIB_TX] == ~0) + { + if (sm->deterministic || + 0 != snat_icmp_hairpinning (sm, b0, ip0, icmp0, + sm->endpoint_dependent)) + vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm0.fib_index; } out: return next0; } +#endif + +static inline u32 +icmp_in2out_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)) + { + /* Accounting */ + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain + (sm->vlib_main, b0), thread_index); + /* Per-user LRU list maintenance */ + nat44_session_update_lru (sm, s0, thread_index); + } + return next0; +} -/** - * @brief Hairpinning - * - * Hairpinning allows two endpoints on the internal side of the NAT to - * communicate even if they only use each other's external IP addresses - * and ports. - * - * @param sm NAT main. - * @param b0 Vlib buffer. - * @param ip0 IP header. - * @param udp0 UDP header. - * @param tcp0 TCP header. - * @param proto0 NAT protocol. - */ -static inline void -snat_hairpinning (snat_main_t *sm, - vlib_buffer_t * b0, - ip4_header_t * ip0, - udp_header_t * udp0, - tcp_header_t * tcp0, - u32 proto0) +static int +nat_in2out_sm_unknown_proto (snat_main_t * sm, + vlib_buffer_t * b, + ip4_header_t * ip, u32 rx_fib_index) { - snat_session_key_t key0, sm0; - snat_worker_key_t k0; - snat_session_t * s0; - clib_bihash_kv_8_8_t kv0, value0; - ip_csum_t sum0; - u32 new_dst_addr0 = 0, old_dst_addr0, ti = 0, si; - u16 new_dst_port0, old_dst_port0; + clib_bihash_kv_8_8_t kv, value; + snat_static_mapping_t *m; + snat_session_key_t m_key; + u32 old_addr, new_addr; + ip_csum_t sum; - key0.addr = ip0->dst_address; - key0.port = udp0->dst_port; - key0.protocol = proto0; - key0.fib_index = sm->outside_fib_index; - kv0.key = key0.as_u64; + 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; - /* Check if destination is in active sessions */ - if (clib_bihash_search_8_8 (&sm->out2in, &kv0, &value0)) - { - /* or static mappings */ - if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0)) - { - new_dst_addr0 = sm0.addr.as_u32; - new_dst_port0 = sm0.port; - vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index; - } - } - else - { - si = value0.value; - if (sm->num_workers > 1) - { - k0.addr = ip0->dst_address; - k0.port = udp0->dst_port; - k0.fib_index = sm->outside_fib_index; - kv0.key = k0.as_u64; - if (clib_bihash_search_8_8 (&sm->worker_by_out, &kv0, &value0)) - ASSERT(0); - else - ti = value0.value; - } - else - ti = sm->num_workers; + m = pool_elt_at_index (sm->static_mappings, value.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; - } + 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); - /* Destination is behind the same NAT, use internal address and port */ - if (new_dst_addr0) + + /* Hairpinning */ + if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0) { - old_dst_addr0 = ip0->dst_address.as_u32; - ip0->dst_address.as_u32 = new_dst_addr0; - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0, - ip4_header_t, dst_address); - ip0->checksum = ip_csum_fold (sum0); - - old_dst_port0 = tcp0->dst; - if (PREDICT_TRUE(new_dst_port0 != old_dst_port0)) - { - if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP)) - { - tcp0->dst = new_dst_port0; - sum0 = tcp0->checksum; - sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0, - ip4_header_t, dst_address); - sum0 = ip_csum_update (sum0, old_dst_port0, new_dst_port0, - ip4_header_t /* cheat */, length); - tcp0->checksum = ip_csum_fold(sum0); - } - else - { - udp0->dst_port = new_dst_port0; - udp0->checksum = 0; - } - } - else - { - if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP)) - { - sum0 = tcp0->checksum; - sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0, - ip4_header_t, dst_address); - tcp0->checksum = ip_csum_fold(sum0); - } - } + vnet_buffer (b)->sw_if_index[VLIB_TX] = m->fib_index; + nat_hairpinning_sm_unknown_proto (sm, b, ip); } + + return 0; } -static inline void -snat_icmp_hairpinning (snat_main_t *sm, - vlib_buffer_t * b0, - ip4_header_t * ip0, - icmp46_header_t * icmp0) +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) { - snat_session_key_t key0, sm0; - clib_bihash_kv_8_8_t kv0, value0; - snat_worker_key_t k0; - u32 new_dst_addr0 = 0, old_dst_addr0, si, ti = 0; - ip_csum_t sum0; - snat_session_t *s0; - - if (!icmp_is_error_message (icmp0)) - { - icmp_echo_header_t *echo0 = (icmp_echo_header_t *)(icmp0+1); - u16 icmp_id0 = echo0->identifier; - key0.addr = ip0->dst_address; - key0.port = icmp_id0; - key0.protocol = SNAT_PROTOCOL_ICMP; - key0.fib_index = sm->outside_fib_index; - kv0.key = key0.as_u64; - - /* Check if destination is in active sessions */ - if (clib_bihash_search_8_8 (&sm->out2in, &kv0, &value0)) - { - /* or static mappings */ - if (!snat_static_mapping_match(sm, key0, &sm0, 1, 0)) - { - new_dst_addr0 = sm0.addr.as_u32; - vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index; - } - } - else - { - si = value0.value; - if (sm->num_workers > 1) - { - k0.addr = ip0->dst_address; - k0.port = icmp_id0; - k0.fib_index = sm->outside_fib_index; - kv0.key = k0.as_u64; - if (clib_bihash_search_8_8 (&sm->worker_by_out, &kv0, &value0)) - ASSERT(0); - else - ti = value0.value; - } - else - ti = sm->num_workers; - - 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; - echo0->identifier = s0->in2out.port; - sum0 = icmp0->checksum; - sum0 = ip_csum_update (sum0, icmp_id0, s0->in2out.port, - icmp_echo_header_t, identifier); - icmp0->checksum = ip_csum_fold (sum0); - } - - /* Destination is behind the same NAT, use internal address and port */ - if (new_dst_addr0) - { - old_dst_addr0 = ip0->dst_address.as_u32; - ip0->dst_address.as_u32 = new_dst_addr0; - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0, - ip4_header_t, dst_address); - ip0->checksum = ip_csum_fold (sum0); - } - } - -} - -static inline u32 icmp_in2out_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); - /* Accounting */ - s0->last_heard = now; - s0->total_pkts++; - s0->total_bytes += vlib_buffer_length_in_chain (sm->vlib_main, b0); - /* Per-user LRU list maintenance for dynamic translations */ - if (!snat_is_session_static (s0)) - { - 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); - } - } - return next0; -} -static inline void -snat_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_unk_proto_ses_key_t key; - snat_session_key_t m_key; - snat_worker_key_t w_key; - snat_static_mapping_t *m; - 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.rsvd[0] = key.rsvd[1] = key.rsvd[2] = 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_unk_proto, &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; - - 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) - { - w_key.addr = ip->dst_address; - w_key.port = 0; - w_key.fib_index = sm->outside_fib_index; - kv.key = w_key.as_u64; - if (clib_bihash_search_8_8 (&sm->worker_by_out, &kv, &value)) - return; - else - ti = value.value; - } - else - ti = sm->num_workers; - - 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 void -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) -{ - 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; - ip_csum_t sum; - snat_user_key_t u_key; - snat_user_t *u; - dlist_elt_t *head, *elt, *oldest; - snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - u32 elt_index, head_index, ses_index, oldest_index; - snat_session_t * s; - snat_unk_proto_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.rsvd[0] = key.rsvd[1] = key.rsvd[2] = 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_unk_proto, &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 - { - u_key.addr = ip->src_address; - u_key.fib_index = rx_fib_index; - kv.key = u_key.as_u64; - - /* Ever heard of the "user" = src ip4 address before? */ - if (clib_bihash_search_8_8 (&sm->user_hash, &kv, &value)) - { - /* no, make a new one */ - pool_get (tsm->users, u); - memset (u, 0, sizeof (*u)); - u->addr = ip->src_address; - u->fib_index = rx_fib_index; - - pool_get (tsm->list_pool, head); - u->sessions_per_user_list_head_index = head - tsm->list_pool; - - clib_dlist_init (tsm->list_pool, - u->sessions_per_user_list_head_index); - - kv.value = u - tsm->users; - - /* add user */ - clib_bihash_add_del_8_8 (&sm->user_hash, &kv, 1); - } - else - { - u = pool_elt_at_index (tsm->users, value.value); - } - - 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 (&sm->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_unk_proto, &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_unk_proto, &s_kv, &s_value)) - { - new_addr = ip->src_address.as_u32 = key.l_addr.as_u32; - address_index = i; - goto create_ses; - } - } - return; - } - -create_ses: - /* Over quota? Recycle the least recently used dynamic translation */ - if (u->nsessions >= sm->max_translations_per_user && !is_sm) - { - /* Remove the oldest dynamic translation */ - do { - oldest_index = clib_dlist_remove_head ( - tsm->list_pool, u->sessions_per_user_list_head_index); - - ASSERT (oldest_index != ~0); - - /* add it back to the end of the LRU list */ - clib_dlist_addtail (tsm->list_pool, - u->sessions_per_user_list_head_index, - oldest_index); - /* Get the list element */ - oldest = pool_elt_at_index (tsm->list_pool, oldest_index); - - /* Get the session index from the list element */ - ses_index = oldest->value; - - /* Get the session */ - s = pool_elt_at_index (tsm->sessions, ses_index); - } while (snat_is_session_static (s)); - - if (snat_is_unk_proto_session (s)) - { - /* Remove from lookup tables */ - key.l_addr = s->in2out.addr; - key.r_addr = s->ext_host_addr; - key.fib_index = s->in2out.fib_index; - key.proto = s->in2out.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->in2out_unk_proto, &s_kv, 0)) - clib_warning ("in2out key del failed"); - - key.l_addr = s->out2in.addr; - key.fib_index = s->out2in.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_unk_proto, &s_kv, 0)) - clib_warning ("out2in key del failed"); - } - else - { - /* log NAT event */ - 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); - - snat_free_outside_address_and_port (sm, &s->out2in, - s->outside_address_index); - - /* Remove in2out, out2in keys */ - kv.key = s->in2out.as_u64; - if (clib_bihash_add_del_8_8 (&sm->in2out, &kv, 0)) - clib_warning ("in2out key del failed"); - kv.key = s->out2in.as_u64; - if (clib_bihash_add_del_8_8 (&sm->out2in, &kv, 0)) - clib_warning ("out2in key del failed"); - } - } - else - { - /* Create a new session */ - pool_get (tsm->sessions, s); - memset (s, 0, sizeof (*s)); - - /* Create list elts */ - pool_get (tsm->list_pool, elt); - clib_dlist_init (tsm->list_pool, elt - tsm->list_pool); - elt->value = s - tsm->sessions; - s->per_user_index = elt - tsm->list_pool; - s->per_user_list_head_index = u->sessions_per_user_list_head_index; - clib_dlist_addtail (tsm->list_pool, s->per_user_list_head_index, - s->per_user_index); - } - - 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++; - } - - /* 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_unk_proto, &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_unk_proto, &s_kv, 1)) - clib_warning ("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 */ - 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; -} - -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; + u32 n_left_from, *from, *to_next; snat_in2out_next_t next_index; u32 pkts_processed = 0; - snat_main_t * sm = &snat_main; + 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; + u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets = + 0, fragments = 0; - stats_node_index = is_slow_path ? snat_in2out_slowpath_node.index : - snat_in2out_node.index; + stats_node_index = is_slow_path ? sm->in2out_slowpath_node_index : + sm->in2out_node_index; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; @@ -1391,32 +886,31 @@ snat_in2out_node_fn_inline (vlib_main_t * vm, { u32 n_left_to_next; - vlib_get_next_frame (vm, node, next_index, - to_next, 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, next1; - u32 sw_if_index0, sw_if_index1; - ip4_header_t * ip0, * ip1; - ip_csum_t sum0, sum1; - u32 new_addr0, old_addr0, new_addr1, old_addr1; - u16 old_port0, new_port0, old_port1, new_port1; - udp_header_t * udp0, * udp1; - tcp_header_t * tcp0, * tcp1; - icmp46_header_t * icmp0, * icmp1; - snat_session_key_t key0, key1; - u32 rx_fib_index0, rx_fib_index1; - u32 proto0, proto1; - snat_session_t * s0 = 0, * s1 = 0; - clib_bihash_kv_8_8_t kv0, value0, kv1, value1; - u32 iph_offset0 = 0, iph_offset1 = 0; + u32 bi0, bi1; + vlib_buffer_t *b0, *b1; + u32 next0, next1; + u32 sw_if_index0, sw_if_index1; + ip4_header_t *ip0, *ip1; + ip_csum_t sum0, sum1; + u32 new_addr0, old_addr0, new_addr1, old_addr1; + u16 old_port0, new_port0, old_port1, new_port1; + udp_header_t *udp0, *udp1; + tcp_header_t *tcp0, *tcp1; + icmp46_header_t *icmp0, *icmp1; + snat_session_key_t key0, key1; + u32 rx_fib_index0, rx_fib_index1; + u32 proto0, proto1; + snat_session_t *s0 = 0, *s1 = 0; + clib_bihash_kv_8_8_t kv0, value0, kv1, value1; + u32 iph_offset0 = 0, iph_offset1 = 0; /* Prefetch next iteration. */ { - vlib_buffer_t * p2, * p3; + vlib_buffer_t *p2, *p3; p2 = vlib_get_buffer (vm, from[2]); p3 = vlib_get_buffer (vm, from[3]); @@ -1428,7 +922,7 @@ snat_in2out_node_fn_inline (vlib_main_t * vm, CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE); } - /* speculatively enqueue b0 and b1 to the current next frame */ + /* speculatively enqueue b0 and b1 to the current next frame */ to_next[0] = bi0 = from[0]; to_next[1] = bi1 = from[1]; from += 2; @@ -1439,1751 +933,783 @@ snat_in2out_node_fn_inline (vlib_main_t * vm, b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); - if (is_output_feature) - iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length; + 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); + ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0) + + iph_offset0); - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + icmp0 = (icmp46_header_t *) udp0; - sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index, - sw_if_index0); + sw_if_index0); - next0 = next1 = SNAT_IN2OUT_NEXT_LOOKUP; + next0 = next1 = SNAT_IN2OUT_NEXT_LOOKUP; - 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; - } + 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; + } - proto0 = ip_proto_to_snat_proto (ip0->protocol); + proto0 = ip_proto_to_snat_proto (ip0->protocol); - /* Next configured feature, probably ip4-lookup */ - if (is_slow_path) - { - if (PREDICT_FALSE (proto0 == ~0)) - { - snat_in2out_unknown_proto (sm, b0, ip0, rx_fib_index0, - thread_index, now, vm); - goto trace00; - } + /* Next configured feature, probably ip4-lookup */ + if (is_slow_path) + { + if (PREDICT_FALSE (proto0 == ~0)) + { + 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]; + } + other_packets++; + goto trace00; + } + + if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) + { + next0 = icmp_in2out_slow_path + (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, + node, next0, now, thread_index, &s0); + icmp_packets++; + goto trace00; + } + } + else + { + if (PREDICT_FALSE (proto0 == ~0)) + { + next0 = SNAT_IN2OUT_NEXT_SLOW_PATH; + goto trace00; + } + + if (ip4_is_fragment (ip0)) + { + next0 = SNAT_IN2OUT_NEXT_REASS; + fragments++; + goto trace00; + } + + if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) + { + next0 = SNAT_IN2OUT_NEXT_SLOW_PATH; + goto trace00; + } + } - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = icmp_in2out_slow_path - (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, - node, next0, now, thread_index, &s0); - goto trace00; - } - } - else - { - if (PREDICT_FALSE (proto0 == ~0 || proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = SNAT_IN2OUT_NEXT_SLOW_PATH; - goto trace00; - } - } + key0.addr = ip0->src_address; + key0.port = udp0->src_port; + key0.protocol = proto0; + key0.fib_index = rx_fib_index0; - key0.addr = ip0->src_address; - key0.port = udp0->src_port; - key0.protocol = proto0; - key0.fib_index = rx_fib_index0; + kv0.key = key0.as_u64; - kv0.key = key0.as_u64; + if (PREDICT_FALSE + (clib_bihash_search_8_8 + (&sm->per_thread_data[thread_index].in2out, &kv0, + &value0) != 0)) + { + if (is_slow_path) + { + 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, now); + if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP)) + goto trace00; + + if (PREDICT_FALSE (!s0)) + 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); - if (PREDICT_FALSE (clib_bihash_search_8_8 (&sm->in2out, &kv0, &value0) != 0)) - { - if (is_slow_path) - { - if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0, - ip0, proto0, rx_fib_index0)) && !is_output_feature) - goto trace00; - - next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0, - &s0, node, next0, thread_index); - 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 (sm->per_thread_data[thread_index].sessions, - value0.value); - - old_addr0 = ip0->src_address.as_u32; - ip0->src_address = s0->out2in.addr; - new_addr0 = ip0->src_address.as_u32; - if (!is_output_feature) - vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index; - - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - src_address /* changed member */); - ip0->checksum = ip_csum_fold (sum0); - - if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP)) - { - old_port0 = tcp0->src_port; - 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); - } - else - { - old_port0 = udp0->src_port; - udp0->src_port = s0->out2in.port; - udp0->checksum = 0; - } + b0->flags |= VNET_BUFFER_F_IS_NATED; - /* Hairpinning */ - if (!is_output_feature) - snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0); + old_addr0 = ip0->src_address.as_u32; + ip0->src_address = s0->out2in.addr; + new_addr0 = ip0->src_address.as_u32; + if (!is_output_feature) + vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index; - /* Accounting */ - s0->last_heard = now; - s0->total_pkts++; - s0->total_bytes += vlib_buffer_length_in_chain (vm, b0); - /* Per-user LRU list maintenance for dynamic translation */ - if (!snat_is_session_static (s0)) - { - 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); - } - trace00: + sum0 = ip0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, + src_address /* changed member */ ); + ip0->checksum = ip_csum_fold (sum0); - 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 - sm->per_thread_data[thread_index].sessions; - } + if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) + { + old_port0 = tcp0->src_port; + 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 */ ); + mss_clamping (sm, tcp0, &sum0); + tcp0->checksum = ip_csum_fold (sum0); + tcp_packets++; + } + else + { + old_port0 = udp0->src_port; + udp0->src_port = s0->out2in.port; + udp0->checksum = 0; + udp_packets++; + } + + /* Accounting */ + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (vm, b0), + thread_index); + /* Per-user LRU list maintenance */ + nat44_session_update_lru (sm, s0, thread_index); + 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 - sm->per_thread_data[thread_index].sessions; + } - pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP; + pkts_processed += next0 == SNAT_IN2OUT_NEXT_LOOKUP; - if (is_output_feature) - iph_offset1 = vnet_buffer (b1)->ip.save_rewrite_length; + 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); + ip1 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b1) + + iph_offset1); - udp1 = ip4_next_header (ip1); - tcp1 = (tcp_header_t *) udp1; - icmp1 = (icmp46_header_t *) udp1; + udp1 = ip4_next_header (ip1); + tcp1 = (tcp_header_t *) udp1; + icmp1 = (icmp46_header_t *) udp1; - sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX]; + sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX]; rx_fib_index1 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index, - sw_if_index1); + 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; - } + 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; + } - proto1 = ip_proto_to_snat_proto (ip1->protocol); + proto1 = ip_proto_to_snat_proto (ip1->protocol); - /* Next configured feature, probably ip4-lookup */ - if (is_slow_path) - { - if (PREDICT_FALSE (proto1 == ~0)) - { - snat_in2out_unknown_proto (sm, b1, ip1, rx_fib_index1, - thread_index, now, vm); - goto trace01; - } + /* Next configured feature, probably ip4-lookup */ + if (is_slow_path) + { + if (PREDICT_FALSE (proto1 == ~0)) + { + 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]; + } + other_packets++; + goto trace01; + } + + if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP)) + { + next1 = icmp_in2out_slow_path + (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node, + next1, now, thread_index, &s1); + icmp_packets++; + goto trace01; + } + } + else + { + if (PREDICT_FALSE (proto1 == ~0)) + { + next1 = SNAT_IN2OUT_NEXT_SLOW_PATH; + goto trace01; + } + + if (ip4_is_fragment (ip1)) + { + next1 = SNAT_IN2OUT_NEXT_REASS; + fragments++; + goto trace01; + } + + if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP)) + { + next1 = SNAT_IN2OUT_NEXT_SLOW_PATH; + goto trace01; + } + } - if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP)) - { - next1 = icmp_in2out_slow_path - (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node, - next1, now, thread_index, &s1); - goto trace01; - } - } - else - { - if (PREDICT_FALSE (proto1 == ~0 || proto1 == SNAT_PROTOCOL_ICMP)) - { - next1 = SNAT_IN2OUT_NEXT_SLOW_PATH; - goto trace01; - } - } + key1.addr = ip1->src_address; + key1.port = udp1->src_port; + key1.protocol = proto1; + key1.fib_index = rx_fib_index1; - key1.addr = ip1->src_address; - key1.port = udp1->src_port; - key1.protocol = proto1; - key1.fib_index = rx_fib_index1; + kv1.key = key1.as_u64; - kv1.key = key1.as_u64; + if (PREDICT_FALSE + (clib_bihash_search_8_8 + (&sm->per_thread_data[thread_index].in2out, &kv1, + &value1) != 0)) + { + if (is_slow_path) + { + 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, now); + if (PREDICT_FALSE (next1 == SNAT_IN2OUT_NEXT_DROP)) + goto trace01; + + if (PREDICT_FALSE (!s1)) + 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); - if (PREDICT_FALSE(clib_bihash_search_8_8 (&sm->in2out, &kv1, &value1) != 0)) - { - if (is_slow_path) - { - if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index1, - ip1, proto1, rx_fib_index1)) && !is_output_feature) - goto trace01; - - next1 = slow_path (sm, b1, ip1, rx_fib_index1, &key1, - &s1, node, next1, thread_index); - 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 (sm->per_thread_data[thread_index].sessions, - value1.value); - - old_addr1 = ip1->src_address.as_u32; - ip1->src_address = s1->out2in.addr; - new_addr1 = ip1->src_address.as_u32; - if (!is_output_feature) - vnet_buffer(b1)->sw_if_index[VLIB_TX] = s1->out2in.fib_index; - - sum1 = ip1->checksum; - sum1 = ip_csum_update (sum1, old_addr1, new_addr1, - ip4_header_t, - src_address /* changed member */); - ip1->checksum = ip_csum_fold (sum1); - - if (PREDICT_TRUE(proto1 == SNAT_PROTOCOL_TCP)) - { - old_port1 = tcp1->src_port; - tcp1->src_port = s1->out2in.port; - new_port1 = tcp1->src_port; - - sum1 = tcp1->checksum; - sum1 = ip_csum_update (sum1, old_addr1, new_addr1, - ip4_header_t, - dst_address /* changed member */); - sum1 = ip_csum_update (sum1, old_port1, new_port1, - ip4_header_t /* cheat */, - length /* changed member */); - tcp1->checksum = ip_csum_fold(sum1); - } - else - { - old_port1 = udp1->src_port; - udp1->src_port = s1->out2in.port; - udp1->checksum = 0; - } + b1->flags |= VNET_BUFFER_F_IS_NATED; - /* Hairpinning */ - if (!is_output_feature) - snat_hairpinning (sm, b1, ip1, udp1, tcp1, proto1); + old_addr1 = ip1->src_address.as_u32; + ip1->src_address = s1->out2in.addr; + new_addr1 = ip1->src_address.as_u32; + if (!is_output_feature) + vnet_buffer (b1)->sw_if_index[VLIB_TX] = s1->out2in.fib_index; - /* Accounting */ - s1->last_heard = now; - s1->total_pkts++; - s1->total_bytes += vlib_buffer_length_in_chain (vm, b1); - /* Per-user LRU list maintenance for dynamic translation */ - if (!snat_is_session_static (s1)) - { - 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); - } - trace01: + sum1 = ip1->checksum; + sum1 = ip_csum_update (sum1, old_addr1, new_addr1, + ip4_header_t, + src_address /* changed member */ ); + ip1->checksum = ip_csum_fold (sum1); - 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->sw_if_index = sw_if_index1; - t->next_index = next1; - t->session_index = ~0; - if (s1) - t->session_index = s1 - sm->per_thread_data[thread_index].sessions; - } + if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP)) + { + old_port1 = tcp1->src_port; + tcp1->src_port = s1->out2in.port; + new_port1 = tcp1->src_port; + + sum1 = tcp1->checksum; + sum1 = ip_csum_update (sum1, old_addr1, new_addr1, + ip4_header_t, + dst_address /* changed member */ ); + sum1 = ip_csum_update (sum1, old_port1, new_port1, + ip4_header_t /* cheat */ , + length /* changed member */ ); + mss_clamping (sm, tcp1, &sum1); + tcp1->checksum = ip_csum_fold (sum1); + tcp_packets++; + } + else + { + old_port1 = udp1->src_port; + udp1->src_port = s1->out2in.port; + udp1->checksum = 0; + udp_packets++; + } - pkts_processed += next1 != SNAT_IN2OUT_NEXT_DROP; + /* Accounting */ + nat44_session_update_counters (s1, now, + vlib_buffer_length_in_chain (vm, b1), + thread_index); + /* Per-user LRU list maintenance */ + nat44_session_update_lru (sm, s1, thread_index); + trace01: - /* 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); - } + 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->sw_if_index = sw_if_index1; + t->next_index = next1; + t->session_index = ~0; + if (s1) + t->session_index = + s1 - sm->per_thread_data[thread_index].sessions; + } + + pkts_processed += next1 == SNAT_IN2OUT_NEXT_LOOKUP; + + /* 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; - u32 sw_if_index0; - ip4_header_t * ip0; - ip_csum_t sum0; - u32 new_addr0, old_addr0; - u16 old_port0, new_port0; - udp_header_t * udp0; - tcp_header_t * tcp0; - icmp46_header_t * icmp0; - snat_session_key_t key0; - u32 rx_fib_index0; - u32 proto0; - snat_session_t * s0 = 0; - clib_bihash_kv_8_8_t kv0, value0; - u32 iph_offset0 = 0; - - /* speculatively enqueue b0 to the current next frame */ + u32 bi0; + vlib_buffer_t *b0; + u32 next0; + u32 sw_if_index0; + ip4_header_t *ip0; + ip_csum_t sum0; + u32 new_addr0, old_addr0; + u16 old_port0, new_port0; + udp_header_t *udp0; + tcp_header_t *tcp0; + icmp46_header_t *icmp0; + snat_session_key_t key0; + u32 rx_fib_index0; + u32 proto0; + snat_session_t *s0 = 0; + clib_bihash_kv_8_8_t kv0, value0; + u32 iph_offset0 = 0; + + /* 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); - - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; - - sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; - rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index, - 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; - } - - proto0 = ip_proto_to_snat_proto (ip0->protocol); - - /* Next configured feature, probably ip4-lookup */ - if (is_slow_path) - { - if (PREDICT_FALSE (proto0 == ~0)) - { - snat_in2out_unknown_proto (sm, b0, ip0, rx_fib_index0, - thread_index, now, vm); - goto trace0; - } - - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = icmp_in2out_slow_path - (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, - next0, now, thread_index, &s0); - goto trace0; - } - } - else - { - if (PREDICT_FALSE (proto0 == ~0 || proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = SNAT_IN2OUT_NEXT_SLOW_PATH; - goto trace0; - } - } - - key0.addr = ip0->src_address; - key0.port = udp0->src_port; - key0.protocol = proto0; - key0.fib_index = rx_fib_index0; - - kv0.key = key0.as_u64; - - if (clib_bihash_search_8_8 (&sm->in2out, &kv0, &value0)) - { - if (is_slow_path) - { - if (PREDICT_FALSE(snat_not_translate(sm, node, sw_if_index0, - ip0, proto0, rx_fib_index0)) && !is_output_feature) - goto trace0; - - next0 = slow_path (sm, b0, ip0, rx_fib_index0, &key0, - &s0, node, next0, thread_index); - - 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 (sm->per_thread_data[thread_index].sessions, - value0.value); - - old_addr0 = ip0->src_address.as_u32; - ip0->src_address = s0->out2in.addr; - new_addr0 = ip0->src_address.as_u32; - if (!is_output_feature) - vnet_buffer(b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index; - - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - src_address /* changed member */); - ip0->checksum = ip_csum_fold (sum0); - - if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP)) - { - old_port0 = tcp0->src_port; - 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); - } - else - { - old_port0 = udp0->src_port; - udp0->src_port = s0->out2in.port; - udp0->checksum = 0; - } - - /* Hairpinning */ - if (!is_output_feature) - snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0); - - /* Accounting */ - s0->last_heard = now; - s0->total_pkts++; - s0->total_bytes += vlib_buffer_length_in_chain (vm, b0); - /* Per-user LRU list maintenance for dynamic translation */ - if (!snat_is_session_static (s0)) - { - 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); - } - - trace0: - 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 - sm->per_thread_data[thread_index].sessions; - } - - 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); - } - - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - } - - vlib_node_increment_counter (vm, stats_node_index, - SNAT_IN2OUT_ERROR_IN2OUT_PACKETS, - pkts_processed); - return frame->n_vectors; -} - -static uword -snat_in2out_fast_path_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - return snat_in2out_node_fn_inline (vm, node, frame, 0 /* is_slow_path */, 0); -} - -VLIB_REGISTER_NODE (snat_in2out_node) = { - .function = snat_in2out_fast_path_fn, - .name = "nat44-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-in2out-slowpath", - [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error", - }, -}; - -VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_node, snat_in2out_fast_path_fn); - -static uword -snat_in2out_output_fast_path_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - return snat_in2out_node_fn_inline (vm, node, frame, 0 /* is_slow_path */, 1); -} - -VLIB_REGISTER_NODE (snat_in2out_output_node) = { - .function = snat_in2out_output_fast_path_fn, - .name = "nat44-in2out-output", - .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-in2out-output-slowpath", - [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error", - }, -}; - -VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_output_node, - snat_in2out_output_fast_path_fn); - -static uword -snat_in2out_slow_path_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - return snat_in2out_node_fn_inline (vm, node, frame, 1 /* is_slow_path */, 0); -} - -VLIB_REGISTER_NODE (snat_in2out_slowpath_node) = { - .function = snat_in2out_slow_path_fn, - .name = "nat44-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_ICMP_ERROR] = "ip4-icmp-error", - }, -}; - -VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_slowpath_node, - snat_in2out_slow_path_fn); - -static uword -snat_in2out_output_slow_path_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - return snat_in2out_node_fn_inline (vm, node, frame, 1 /* is_slow_path */, 1); -} - -VLIB_REGISTER_NODE (snat_in2out_output_slowpath_node) = { - .function = snat_in2out_output_slow_path_fn, - .name = "nat44-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-in2out-output-slowpath", - [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error", - }, -}; - -VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_output_slowpath_node, - snat_in2out_output_slow_path_fn); - -/**************************/ -/*** deterministic mode ***/ -/**************************/ -static uword -snat_det_in2out_node_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - u32 n_left_from, * from, * to_next; - snat_in2out_next_t next_index; - u32 pkts_processed = 0; - snat_main_t * sm = &snat_main; - u32 now = (u32) vlib_time_now (vm); - u32 thread_index = vlib_get_thread_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, next1; - u32 sw_if_index0, sw_if_index1; - ip4_header_t * ip0, * ip1; - ip_csum_t sum0, sum1; - ip4_address_t new_addr0, old_addr0, new_addr1, old_addr1; - u16 old_port0, new_port0, lo_port0, i0; - u16 old_port1, new_port1, lo_port1, i1; - udp_header_t * udp0, * udp1; - tcp_header_t * tcp0, * tcp1; - u32 proto0, proto1; - snat_det_out_key_t key0, key1; - snat_det_map_t * dm0, * dm1; - snat_det_session_t * ses0 = 0, * ses1 = 0; - u32 rx_fib_index0, rx_fib_index1; - icmp46_header_t * icmp0, * icmp1; - - /* 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; - next1 = SNAT_IN2OUT_NEXT_LOOKUP; - - ip0 = vlib_buffer_get_current (b0); - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - - sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; - - 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; - } - - proto0 = ip_proto_to_snat_proto (ip0->protocol); - - if (PREDICT_FALSE(proto0 == SNAT_PROTOCOL_ICMP)) - { - rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0); - icmp0 = (icmp46_header_t *) udp0; - - next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0, - rx_fib_index0, node, next0, thread_index, - &ses0, &dm0); - goto trace0; - } - - 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); - next0 = SNAT_IN2OUT_NEXT_DROP; - b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION]; - goto trace0; - } - - snat_det_forward(dm0, &ip0->src_address, &new_addr0, &lo_port0); - - key0.ext_host_addr = ip0->dst_address; - key0.ext_host_port = tcp0->dst; - - ses0 = snat_det_find_ses_by_in(dm0, &ip0->src_address, tcp0->src, key0); - if (PREDICT_FALSE(!ses0)) - { - for (i0 = 0; i0 < dm0->ports_per_host; i0++) - { - key0.out_port = clib_host_to_net_u16 (lo_port0 + - ((i0 + clib_net_to_host_u16 (tcp0->src)) % dm0->ports_per_host)); - - if (snat_det_get_ses_by_out (dm0, &ip0->src_address, key0.as_u64)) - continue; - - ses0 = snat_det_ses_create(dm0, &ip0->src_address, tcp0->src, &key0); - break; - } - if (PREDICT_FALSE(!ses0)) - { - /* too many sessions for user, send ICMP error packet */ - - vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (b0, ICMP4_destination_unreachable, - ICMP4_destination_unreachable_destination_unreachable_host, - 0); - next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR; - goto trace0; - } - } - - new_port0 = ses0->out.out_port; - - old_addr0.as_u32 = ip0->src_address.as_u32; - ip0->src_address.as_u32 = new_addr0.as_u32; - vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm->outside_fib_index; - - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32, - ip4_header_t, - src_address /* changed member */); - ip0->checksum = ip_csum_fold (sum0); - - if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP)) - { - if (tcp0->flags & TCP_FLAG_SYN) - ses0->state = SNAT_SESSION_TCP_SYN_SENT; - else if (tcp0->flags & TCP_FLAG_ACK && ses0->state == SNAT_SESSION_TCP_SYN_SENT) - ses0->state = SNAT_SESSION_TCP_ESTABLISHED; - else if (tcp0->flags & TCP_FLAG_FIN && ses0->state == SNAT_SESSION_TCP_ESTABLISHED) - ses0->state = SNAT_SESSION_TCP_FIN_WAIT; - else if (tcp0->flags & TCP_FLAG_ACK && ses0->state == SNAT_SESSION_TCP_FIN_WAIT) - snat_det_ses_close(dm0, ses0); - else if (tcp0->flags & TCP_FLAG_FIN && ses0->state == SNAT_SESSION_TCP_CLOSE_WAIT) - ses0->state = SNAT_SESSION_TCP_LAST_ACK; - else if (tcp0->flags == 0 && ses0->state == SNAT_SESSION_UNKNOWN) - ses0->state = SNAT_SESSION_TCP_ESTABLISHED; - - old_port0 = tcp0->src; - tcp0->src = new_port0; - - sum0 = tcp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32, - 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 - { - ses0->state = SNAT_SESSION_UDP_ACTIVE; - old_port0 = udp0->src_port; - udp0->src_port = new_port0; - udp0->checksum = 0; - } - - switch(ses0->state) - { - case SNAT_SESSION_UDP_ACTIVE: - ses0->expire = now + sm->udp_timeout; - break; - case SNAT_SESSION_TCP_SYN_SENT: - case SNAT_SESSION_TCP_FIN_WAIT: - case SNAT_SESSION_TCP_CLOSE_WAIT: - case SNAT_SESSION_TCP_LAST_ACK: - ses0->expire = now + sm->tcp_transitory_timeout; - break; - case SNAT_SESSION_TCP_ESTABLISHED: - ses0->expire = now + sm->tcp_established_timeout; - break; - } - - trace0: - 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 = 0; - t->sw_if_index = sw_if_index0; - t->next_index = next0; - t->session_index = ~0; - if (ses0) - t->session_index = ses0 - dm0->sessions; - } - - pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP; - - ip1 = vlib_buffer_get_current (b1); - udp1 = ip4_next_header (ip1); - tcp1 = (tcp_header_t *) udp1; - - sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX]; - - 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 trace1; - } - - proto1 = ip_proto_to_snat_proto (ip1->protocol); - - if (PREDICT_FALSE(proto1 == SNAT_PROTOCOL_ICMP)) - { - rx_fib_index1 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index1); - icmp1 = (icmp46_header_t *) udp1; - - next1 = icmp_in2out(sm, b1, ip1, icmp1, sw_if_index1, - rx_fib_index1, node, next1, thread_index, - &ses1, &dm1); - goto trace1; - } - - 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); - next1 = SNAT_IN2OUT_NEXT_DROP; - b1->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION]; - goto trace1; - } - - snat_det_forward(dm1, &ip1->src_address, &new_addr1, &lo_port1); - - key1.ext_host_addr = ip1->dst_address; - key1.ext_host_port = tcp1->dst; - - ses1 = snat_det_find_ses_by_in(dm1, &ip1->src_address, tcp1->src, key1); - if (PREDICT_FALSE(!ses1)) - { - for (i1 = 0; i1 < dm1->ports_per_host; i1++) - { - key1.out_port = clib_host_to_net_u16 (lo_port1 + - ((i1 + clib_net_to_host_u16 (tcp1->src)) % dm1->ports_per_host)); - - if (snat_det_get_ses_by_out (dm1, &ip1->src_address, key1.as_u64)) - continue; - - ses1 = snat_det_ses_create(dm1, &ip1->src_address, tcp1->src, &key1); - break; - } - if (PREDICT_FALSE(!ses1)) - { - /* too many sessions for user, send ICMP error packet */ - - vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (b1, ICMP4_destination_unreachable, - ICMP4_destination_unreachable_destination_unreachable_host, - 0); - next1 = SNAT_IN2OUT_NEXT_ICMP_ERROR; - goto trace1; - } - } - - new_port1 = ses1->out.out_port; - - old_addr1.as_u32 = ip1->src_address.as_u32; - ip1->src_address.as_u32 = new_addr1.as_u32; - vnet_buffer(b1)->sw_if_index[VLIB_TX] = sm->outside_fib_index; - - sum1 = ip1->checksum; - sum1 = ip_csum_update (sum1, old_addr1.as_u32, new_addr1.as_u32, - ip4_header_t, - src_address /* changed member */); - ip1->checksum = ip_csum_fold (sum1); - - if (PREDICT_TRUE(proto1 == SNAT_PROTOCOL_TCP)) - { - if (tcp1->flags & TCP_FLAG_SYN) - ses1->state = SNAT_SESSION_TCP_SYN_SENT; - else if (tcp1->flags & TCP_FLAG_ACK && ses1->state == SNAT_SESSION_TCP_SYN_SENT) - ses1->state = SNAT_SESSION_TCP_ESTABLISHED; - else if (tcp1->flags & TCP_FLAG_FIN && ses1->state == SNAT_SESSION_TCP_ESTABLISHED) - ses1->state = SNAT_SESSION_TCP_FIN_WAIT; - else if (tcp1->flags & TCP_FLAG_ACK && ses1->state == SNAT_SESSION_TCP_FIN_WAIT) - snat_det_ses_close(dm1, ses1); - else if (tcp1->flags & TCP_FLAG_FIN && ses1->state == SNAT_SESSION_TCP_CLOSE_WAIT) - ses1->state = SNAT_SESSION_TCP_LAST_ACK; - else if (tcp1->flags == 0 && ses1->state == SNAT_SESSION_UNKNOWN) - ses1->state = SNAT_SESSION_TCP_ESTABLISHED; - - old_port1 = tcp1->src; - tcp1->src = new_port1; - - sum1 = tcp1->checksum; - sum1 = ip_csum_update (sum1, old_addr1.as_u32, new_addr1.as_u32, - ip4_header_t, - dst_address /* changed member */); - sum1 = ip_csum_update (sum1, old_port1, new_port1, - ip4_header_t /* cheat */, - length /* changed member */); - tcp1->checksum = ip_csum_fold(sum1); - } - else - { - ses1->state = SNAT_SESSION_UDP_ACTIVE; - old_port1 = udp1->src_port; - udp1->src_port = new_port1; - udp1->checksum = 0; - } - - switch(ses1->state) - { - case SNAT_SESSION_UDP_ACTIVE: - ses1->expire = now + sm->udp_timeout; - break; - case SNAT_SESSION_TCP_SYN_SENT: - case SNAT_SESSION_TCP_FIN_WAIT: - case SNAT_SESSION_TCP_CLOSE_WAIT: - case SNAT_SESSION_TCP_LAST_ACK: - ses1->expire = now + sm->tcp_transitory_timeout; - break; - case SNAT_SESSION_TCP_ESTABLISHED: - ses1->expire = now + sm->tcp_established_timeout; - break; - } - - trace1: - 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 = 0; - t->sw_if_index = sw_if_index1; - t->next_index = next1; - t->session_index = ~0; - if (ses1) - t->session_index = ses1 - dm1->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; - u32 sw_if_index0; - ip4_header_t * ip0; - ip_csum_t sum0; - ip4_address_t new_addr0, old_addr0; - u16 old_port0, new_port0, lo_port0, i0; - udp_header_t * udp0; - tcp_header_t * tcp0; - u32 proto0; - snat_det_out_key_t key0; - snat_det_map_t * dm0; - snat_det_session_t * ses0 = 0; - u32 rx_fib_index0; - icmp46_header_t * icmp0; - - /* 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; - - ip0 = vlib_buffer_get_current (b0); - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - - sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; - - 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; - } - - proto0 = ip_proto_to_snat_proto (ip0->protocol); - - if (PREDICT_FALSE(proto0 == SNAT_PROTOCOL_ICMP)) - { - rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0); - icmp0 = (icmp46_header_t *) udp0; - - next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0, - rx_fib_index0, node, next0, thread_index, - &ses0, &dm0); - goto trace00; - } - - 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); - next0 = SNAT_IN2OUT_NEXT_DROP; - b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION]; - goto trace00; - } - - snat_det_forward(dm0, &ip0->src_address, &new_addr0, &lo_port0); - - key0.ext_host_addr = ip0->dst_address; - key0.ext_host_port = tcp0->dst; - - ses0 = snat_det_find_ses_by_in(dm0, &ip0->src_address, tcp0->src, key0); - if (PREDICT_FALSE(!ses0)) - { - for (i0 = 0; i0 < dm0->ports_per_host; i0++) - { - key0.out_port = clib_host_to_net_u16 (lo_port0 + - ((i0 + clib_net_to_host_u16 (tcp0->src)) % dm0->ports_per_host)); - - if (snat_det_get_ses_by_out (dm0, &ip0->src_address, key0.as_u64)) - continue; - - ses0 = snat_det_ses_create(dm0, &ip0->src_address, tcp0->src, &key0); - break; - } - if (PREDICT_FALSE(!ses0)) - { - /* too many sessions for user, send ICMP error packet */ - - vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (b0, ICMP4_destination_unreachable, - ICMP4_destination_unreachable_destination_unreachable_host, - 0); - next0 = SNAT_IN2OUT_NEXT_ICMP_ERROR; - goto trace00; - } - } - - new_port0 = ses0->out.out_port; - - old_addr0.as_u32 = ip0->src_address.as_u32; - ip0->src_address.as_u32 = new_addr0.as_u32; - vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm->outside_fib_index; - - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32, - ip4_header_t, - src_address /* changed member */); - ip0->checksum = ip_csum_fold (sum0); - - if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP)) - { - if (tcp0->flags & TCP_FLAG_SYN) - ses0->state = SNAT_SESSION_TCP_SYN_SENT; - else if (tcp0->flags & TCP_FLAG_ACK && ses0->state == SNAT_SESSION_TCP_SYN_SENT) - ses0->state = SNAT_SESSION_TCP_ESTABLISHED; - else if (tcp0->flags & TCP_FLAG_FIN && ses0->state == SNAT_SESSION_TCP_ESTABLISHED) - ses0->state = SNAT_SESSION_TCP_FIN_WAIT; - else if (tcp0->flags & TCP_FLAG_ACK && ses0->state == SNAT_SESSION_TCP_FIN_WAIT) - snat_det_ses_close(dm0, ses0); - else if (tcp0->flags & TCP_FLAG_FIN && ses0->state == SNAT_SESSION_TCP_CLOSE_WAIT) - ses0->state = SNAT_SESSION_TCP_LAST_ACK; - else if (tcp0->flags == 0 && ses0->state == SNAT_SESSION_UNKNOWN) - ses0->state = SNAT_SESSION_TCP_ESTABLISHED; - - old_port0 = tcp0->src; - tcp0->src = new_port0; - - sum0 = tcp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0.as_u32, new_addr0.as_u32, - 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 - { - ses0->state = SNAT_SESSION_UDP_ACTIVE; - old_port0 = udp0->src_port; - udp0->src_port = new_port0; - udp0->checksum = 0; - } - - switch(ses0->state) - { - case SNAT_SESSION_UDP_ACTIVE: - ses0->expire = now + sm->udp_timeout; - break; - case SNAT_SESSION_TCP_SYN_SENT: - case SNAT_SESSION_TCP_FIN_WAIT: - case SNAT_SESSION_TCP_CLOSE_WAIT: - case SNAT_SESSION_TCP_LAST_ACK: - ses0->expire = now + sm->tcp_transitory_timeout; - break; - case SNAT_SESSION_TCP_ESTABLISHED: - ses0->expire = now + sm->tcp_established_timeout; - break; - } - - 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 = 0; - t->sw_if_index = sw_if_index0; - t->next_index = next0; - t->session_index = ~0; - if (ses0) - t->session_index = ses0 - dm0->sessions; - } - - 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); - } - - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - } - - vlib_node_increment_counter (vm, snat_det_in2out_node.index, - SNAT_IN2OUT_ERROR_IN2OUT_PACKETS, - pkts_processed); - return frame->n_vectors; -} - -VLIB_REGISTER_NODE (snat_det_in2out_node) = { - .function = snat_det_in2out_node_fn, - .name = "nat44-det-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 = 3, - - /* edit / add dispositions here */ - .next_nodes = { - [SNAT_IN2OUT_NEXT_DROP] = "error-drop", - [SNAT_IN2OUT_NEXT_LOOKUP] = "ip4-lookup", - [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error", - }, -}; - -VLIB_NODE_FUNCTION_MULTIARCH (snat_det_in2out_node, snat_det_in2out_node_fn); - -/** - * Get address and port values to be used for ICMP packet translation - * and create session if needed - * - * @param[in,out] sm NAT main - * @param[in,out] node NAT node runtime - * @param[in] thread_index thread index - * @param[in,out] b0 buffer containing packet to be translated - * @param[out] p_proto protocol used for matching - * @param[out] p_value address and port after NAT translation - * @param[out] p_dont_translate if packet should not be translated - * @param d optional parameter - * @param e optional parameter - */ -u32 icmp_match_in2out_det(snat_main_t *sm, vlib_node_runtime_t *node, - u32 thread_index, vlib_buffer_t *b0, u8 *p_proto, - snat_session_key_t *p_value, - u8 *p_dont_translate, void *d, void *e) -{ - ip4_header_t *ip0; - icmp46_header_t *icmp0; - u32 sw_if_index0; - u32 rx_fib_index0; - u8 protocol; - snat_det_out_key_t key0; - u8 dont_translate = 0; - u32 next0 = ~0; - icmp_echo_header_t *echo0, *inner_echo0 = 0; - ip4_header_t *inner_ip0; - void *l4_header = 0; - icmp46_header_t *inner_icmp0; - snat_det_map_t * dm0 = 0; - ip4_address_t new_addr0; - u16 lo_port0, i0; - snat_det_session_t * ses0 = 0; - ip4_address_t in_addr; - u16 in_port; - - ip0 = vlib_buffer_get_current (b0); - icmp0 = (icmp46_header_t *) ip4_next_header (ip0); - echo0 = (icmp_echo_header_t *)(icmp0+1); - sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; - rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0); - - if (!icmp_is_error_message (icmp0)) - { - protocol = SNAT_PROTOCOL_ICMP; - in_addr = ip0->src_address; - in_port = echo0->identifier; - } - else - { - inner_ip0 = (ip4_header_t *)(echo0+1); - l4_header = ip4_next_header (inner_ip0); - protocol = ip_proto_to_snat_proto (inner_ip0->protocol); - in_addr = inner_ip0->dst_address; - switch (protocol) - { - case SNAT_PROTOCOL_ICMP: - inner_icmp0 = (icmp46_header_t*)l4_header; - inner_echo0 = (icmp_echo_header_t *)(inner_icmp0+1); - in_port = inner_echo0->identifier; - break; - case SNAT_PROTOCOL_UDP: - case SNAT_PROTOCOL_TCP: - in_port = ((tcp_udp_header_t*)l4_header)->dst_port; - break; - default: - b0->error = node->errors[SNAT_IN2OUT_ERROR_UNSUPPORTED_PROTOCOL]; - next0 = SNAT_IN2OUT_NEXT_DROP; - goto out; - } - } - - 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); - if (PREDICT_FALSE(snat_not_translate_fast(sm, node, sw_if_index0, ip0, - IP_PROTOCOL_ICMP, rx_fib_index0))) - { - dont_translate = 1; - goto out; - } - next0 = SNAT_IN2OUT_NEXT_DROP; - b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION]; - goto out; - } - - snat_det_forward(dm0, &in_addr, &new_addr0, &lo_port0); - - key0.ext_host_addr = ip0->dst_address; - key0.ext_host_port = 0; - - ses0 = snat_det_find_ses_by_in(dm0, &in_addr, in_port, key0); - if (PREDICT_FALSE(!ses0)) - { - if (PREDICT_FALSE(snat_not_translate_fast(sm, node, sw_if_index0, ip0, - IP_PROTOCOL_ICMP, rx_fib_index0))) - { - dont_translate = 1; - goto out; - } - if (icmp0->type != ICMP4_echo_request) - { - b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE]; - next0 = SNAT_IN2OUT_NEXT_DROP; - goto out; - } - for (i0 = 0; i0 < dm0->ports_per_host; i0++) - { - key0.out_port = clib_host_to_net_u16 (lo_port0 + - ((i0 + clib_net_to_host_u16 (echo0->identifier)) % dm0->ports_per_host)); - - if (snat_det_get_ses_by_out (dm0, &in_addr, key0.as_u64)) - continue; - - ses0 = snat_det_ses_create(dm0, &in_addr, echo0->identifier, &key0); - break; - } - if (PREDICT_FALSE(!ses0)) - { - next0 = SNAT_IN2OUT_NEXT_DROP; - b0->error = node->errors[SNAT_IN2OUT_ERROR_OUT_OF_PORTS]; - goto out; - } - } - - if (PREDICT_FALSE(icmp0->type != ICMP4_echo_request && - !icmp_is_error_message (icmp0))) - { - b0->error = node->errors[SNAT_IN2OUT_ERROR_BAD_ICMP_TYPE]; - next0 = SNAT_IN2OUT_NEXT_DROP; - goto out; - } - - u32 now = (u32) vlib_time_now (sm->vlib_main); - - ses0->state = SNAT_SESSION_ICMP_ACTIVE; - ses0->expire = now + sm->icmp_timeout; - -out: - *p_proto = protocol; - if (ses0) - { - p_value->addr = new_addr0; - p_value->fib_index = sm->outside_fib_index; - p_value->port = ses0->out.out_port; - } - *p_dont_translate = dont_translate; - if (d) - *(snat_det_session_t**)d = ses0; - if (e) - *(snat_det_map_t**)e = dm0; - return next0; -} - -/**********************/ -/*** worker handoff ***/ -/**********************/ -static inline uword -snat_in2out_worker_handoff_fn_inline (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame, - u8 is_output) -{ - snat_main_t *sm = &snat_main; - vlib_thread_main_t *tm = vlib_get_thread_main (); - u32 n_left_from, *from, *to_next = 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_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 fq_index; - u32 to_node_index; - - ASSERT (vec_len (sm->workers)); - - if (is_output) - { - fq_index = sm->fq_in2out_output_index; - to_node_index = sm->in2out_output_node_index; - } - else - { - fq_index = sm->fq_in2out_index; - to_node_index = sm->in2out_node_index; - } - - if (PREDICT_FALSE (handoff_queue_elt_by_worker_index == 0)) - { - 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, - (vlib_frame_queue_t *) (~0)); - } - - from = vlib_frame_vector_args (frame); - n_left_from = frame->n_vectors; + n_left_from -= 1; + n_left_to_next -= 1; - while (n_left_from > 0) - { - u32 bi0; - vlib_buffer_t *b0; - u32 sw_if_index0; - u32 rx_fib_index0; - ip4_header_t * ip0; - u8 do_handoff; + b0 = vlib_get_buffer (vm, bi0); + next0 = SNAT_IN2OUT_NEXT_LOOKUP; - bi0 = from[0]; - from += 1; - n_left_from -= 1; + if (is_output_feature) + iph_offset0 = vnet_buffer (b0)->ip.save_rewrite_length; - b0 = vlib_get_buffer (vm, bi0); + 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 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0); + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + icmp0 = (icmp46_header_t *) udp0; - ip0 = vlib_buffer_get_current (b0); + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index, + sw_if_index0); - next_worker_index = sm->worker_in2out_cb(ip0, rx_fib_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; + } - if (PREDICT_FALSE (next_worker_index != thread_index)) - { - do_handoff = 1; + proto0 = ip_proto_to_snat_proto (ip0->protocol); - if (next_worker_index != current_worker_index) - { - if (hf) - hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker; + /* Next configured feature, probably ip4-lookup */ + if (is_slow_path) + { + if (PREDICT_FALSE (proto0 == ~0)) + { + 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]; + } + other_packets++; + goto trace0; + } + + if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) + { + next0 = icmp_in2out_slow_path + (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, + next0, now, thread_index, &s0); + icmp_packets++; + goto trace0; + } + } + else + { + if (PREDICT_FALSE (proto0 == ~0)) + { + next0 = SNAT_IN2OUT_NEXT_SLOW_PATH; + goto trace0; + } + + if (ip4_is_fragment (ip0)) + { + next0 = SNAT_IN2OUT_NEXT_REASS; + fragments++; + goto trace0; + } + + if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) + { + next0 = SNAT_IN2OUT_NEXT_SLOW_PATH; + goto trace0; + } + } - hf = vlib_get_worker_handoff_queue_elt (fq_index, - next_worker_index, - handoff_queue_elt_by_worker_index); + key0.addr = ip0->src_address; + key0.port = udp0->src_port; + key0.protocol = proto0; + key0.fib_index = rx_fib_index0; - n_left_to_next_worker = VLIB_FRAME_SIZE - hf->n_vectors; - to_next_worker = &hf->buffer_index[hf->n_vectors]; - current_worker_index = next_worker_index; - } + kv0.key = key0.as_u64; - /* enqueue to correct worker thread */ - to_next_worker[0] = bi0; - to_next_worker++; - n_left_to_next_worker--; + if (clib_bihash_search_8_8 + (&sm->per_thread_data[thread_index].in2out, &kv0, &value0)) + { + if (is_slow_path) + { + 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, now); + + if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP)) + goto trace0; + + if (PREDICT_FALSE (!s0)) + 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); - if (n_left_to_next_worker == 0) - { - hf->n_vectors = VLIB_FRAME_SIZE; - vlib_put_frame_queue_elt (hf); - current_worker_index = ~0; - handoff_queue_elt_by_worker_index[next_worker_index] = 0; - hf = 0; - } - } - else - { - do_handoff = 0; - /* if this is 1st frame */ - if (!f) - { - f = vlib_get_frame_to_node (vm, to_node_index); - to_next = vlib_frame_vector_args (f); - } + b0->flags |= VNET_BUFFER_F_IS_NATED; - to_next[0] = bi0; - to_next += 1; - f->n_vectors++; - } + old_addr0 = ip0->src_address.as_u32; + ip0->src_address = s0->out2in.addr; + new_addr0 = ip0->src_address.as_u32; + if (!is_output_feature) + vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index; - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - snat_in2out_worker_handoff_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->next_worker_index = next_worker_index; - t->do_handoff = do_handoff; - } - } + sum0 = ip0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, + src_address /* changed member */ ); + ip0->checksum = ip_csum_fold (sum0); - if (f) - vlib_put_frame_to_node (vm, to_node_index, f); + if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) + { + old_port0 = tcp0->src_port; + 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 */ ); + mss_clamping (sm, tcp0, &sum0); + tcp0->checksum = ip_csum_fold (sum0); + tcp_packets++; + } + else + { + old_port0 = udp0->src_port; + udp0->src_port = s0->out2in.port; + udp0->checksum = 0; + udp_packets++; + } - if (hf) - hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker; + /* Accounting */ + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (vm, b0), + thread_index); + /* Per-user LRU list maintenance */ + nat44_session_update_lru (sm, s0, thread_index); - /* Ship frames to the worker nodes */ - for (i = 0; i < vec_len (handoff_queue_elt_by_worker_index); i++) - { - if (handoff_queue_elt_by_worker_index[i]) - { - hf = handoff_queue_elt_by_worker_index[i]; - /* - * It works better to let the handoff node - * rate-adapt, always ship the handoff queue element. - */ - if (1 || hf->n_vectors == hf->last_n_vectors) + trace0: + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) { - vlib_put_frame_queue_elt (hf); - handoff_queue_elt_by_worker_index[i] = 0; + 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 - sm->per_thread_data[thread_index].sessions; } - else - hf->last_n_vectors = hf->n_vectors; + + pkts_processed += next0 == SNAT_IN2OUT_NEXT_LOOKUP; + + /* 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); } - congested_handoff_queue_by_worker_index[i] = - (vlib_frame_queue_t *) (~0); + + vlib_put_next_frame (vm, node, next_index, n_left_to_next); } - hf = 0; - current_worker_index = ~0; + + vlib_node_increment_counter (vm, stats_node_index, + SNAT_IN2OUT_ERROR_IN2OUT_PACKETS, + pkts_processed); + vlib_node_increment_counter (vm, stats_node_index, + SNAT_IN2OUT_ERROR_TCP_PACKETS, tcp_packets); + vlib_node_increment_counter (vm, stats_node_index, + SNAT_IN2OUT_ERROR_UDP_PACKETS, tcp_packets); + vlib_node_increment_counter (vm, stats_node_index, + SNAT_IN2OUT_ERROR_ICMP_PACKETS, icmp_packets); + vlib_node_increment_counter (vm, stats_node_index, + SNAT_IN2OUT_ERROR_OTHER_PACKETS, + other_packets); + vlib_node_increment_counter (vm, stats_node_index, + SNAT_IN2OUT_ERROR_FRAGMENTS, fragments); + return frame->n_vectors; } -static uword -snat_in2out_worker_handoff_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) +VLIB_NODE_FN (snat_in2out_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) { - return snat_in2out_worker_handoff_fn_inline (vm, node, frame, 0); + return snat_in2out_node_fn_inline (vm, node, frame, 0 /* is_slow_path */ , + 0); } -VLIB_REGISTER_NODE (snat_in2out_worker_handoff_node) = { - .function = snat_in2out_worker_handoff_fn, - .name = "nat44-in2out-worker-handoff", +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (snat_in2out_node) = { + .name = "nat44-in2out", .vector_size = sizeof (u32), - .format_trace = format_snat_in2out_worker_handoff_trace, + .format_trace = format_snat_in2out_trace, .type = VLIB_NODE_TYPE_INTERNAL, - .n_next_nodes = 1, + .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 = { - [0] = "error-drop", + [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", }, }; +/* *INDENT-ON* */ -VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_worker_handoff_node, - snat_in2out_worker_handoff_fn); - -static uword -snat_in2out_output_worker_handoff_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) +VLIB_NODE_FN (snat_in2out_output_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) { - return snat_in2out_worker_handoff_fn_inline (vm, node, frame, 1); + return snat_in2out_node_fn_inline (vm, node, frame, 0 /* is_slow_path */ , + 1); } -VLIB_REGISTER_NODE (snat_in2out_output_worker_handoff_node) = { - .function = snat_in2out_output_worker_handoff_fn, - .name = "nat44-in2out-output-worker-handoff", +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (snat_in2out_output_node) = { + .name = "nat44-in2out-output", .vector_size = sizeof (u32), - .format_trace = format_snat_in2out_worker_handoff_trace, + .format_trace = format_snat_in2out_trace, .type = VLIB_NODE_TYPE_INTERNAL, - .n_next_nodes = 1, + .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 = { - [0] = "error-drop", + [SNAT_IN2OUT_NEXT_DROP] = "error-drop", + [SNAT_IN2OUT_NEXT_LOOKUP] = "interface-output", + [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-output-slowpath", + [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error", + [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass", }, }; +/* *INDENT-ON* */ -VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_output_worker_handoff_node, - snat_in2out_output_worker_handoff_fn); - -static_always_inline int -is_hairpinning (snat_main_t *sm, ip4_address_t * dst_addr) +VLIB_NODE_FN (snat_in2out_slowpath_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) { - snat_address_t * ap; - clib_bihash_kv_8_8_t kv, value; - snat_session_key_t m_key; - - vec_foreach (ap, sm->addresses) - { - if (ap->addr.as_u32 == dst_addr->as_u32) - return 1; - } - - m_key.addr.as_u32 = dst_addr->as_u32; - 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 1; - - return 0; + return snat_in2out_node_fn_inline (vm, node, frame, 1 /* is_slow_path */ , + 0); } -static uword -snat_hairpin_dst_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - u32 n_left_from, * from, * to_next; - snat_in2out_next_t next_index; - u32 pkts_processed = 0; - snat_main_t * sm = &snat_main; - - 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 > 0 && n_left_to_next > 0) - { - u32 bi0; - vlib_buffer_t * b0; - u32 next0; - ip4_header_t * ip0; - u32 proto0; - - /* 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; - ip0 = vlib_buffer_get_current (b0); - - proto0 = ip_proto_to_snat_proto (ip0->protocol); - - vnet_buffer (b0)->snat.flags = 0; - if (PREDICT_FALSE (is_hairpinning (sm, &ip0->dst_address))) - { - if (proto0 == SNAT_PROTOCOL_TCP || proto0 == SNAT_PROTOCOL_UDP) - { - udp_header_t * udp0 = ip4_next_header (ip0); - tcp_header_t * tcp0 = (tcp_header_t *) udp0; - - snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0); - } - else if (proto0 == SNAT_PROTOCOL_ICMP) - { - icmp46_header_t * icmp0 = ip4_next_header (ip0); - - snat_icmp_hairpinning (sm, b0, ip0, icmp0); - } - else - { - snat_hairpinning_unknown_proto (sm, b0, ip0); - } +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (snat_in2out_slowpath_node) = { + .name = "nat44-in2out-slowpath", + .vector_size = sizeof (u32), + .format_trace = format_snat_in2out_trace, + .type = VLIB_NODE_TYPE_INTERNAL, - vnet_buffer (b0)->snat.flags = SNAT_FLAG_HAIRPINNING; - clib_warning("is hairpinning"); - } + .n_errors = ARRAY_LEN(snat_in2out_error_strings), + .error_strings = snat_in2out_error_strings, - pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP; + .runtime_data_bytes = sizeof (snat_runtime_t), - /* 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); - } + .n_next_nodes = SNAT_IN2OUT_N_NEXT, - vlib_put_next_frame (vm, node, next_index, n_left_to_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_ICMP_ERROR] = "ip4-icmp-error", + [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass", + }, +}; +/* *INDENT-ON* */ - vlib_node_increment_counter (vm, snat_hairpin_dst_node.index, - SNAT_IN2OUT_ERROR_IN2OUT_PACKETS, - pkts_processed); - return frame->n_vectors; +VLIB_NODE_FN (snat_in2out_output_slowpath_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return snat_in2out_node_fn_inline (vm, node, frame, 1 /* is_slow_path */ , + 1); } -VLIB_REGISTER_NODE (snat_hairpin_dst_node) = { - .function = snat_hairpin_dst_fn, - .name = "nat44-hairpin-dst", +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (snat_in2out_output_slowpath_node) = { + .name = "nat44-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, - .n_next_nodes = 2, + + .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_LOOKUP] = "interface-output", + [SNAT_IN2OUT_NEXT_SLOW_PATH] = "nat44-in2out-output-slowpath", + [SNAT_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error", + [SNAT_IN2OUT_NEXT_REASS] = "nat44-in2out-reass", }, }; +/* *INDENT-ON* */ -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) +VLIB_NODE_FN (nat44_in2out_reass_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) { - u32 n_left_from, * from, * to_next; + u32 n_left_from, *from, *to_next; snat_in2out_next_t next_index; - u32 pkts_processed = 0; + u32 pkts_processed = 0, cached_fragments = 0; snat_main_t *sm = &snat_main; + f64 now = vlib_time_now (vm); + 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; + u32 *fragments_to_loopback = 0; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; @@ -3193,16 +1719,26 @@ snat_hairpin_src_fn (vlib_main_t * vm, { u32 n_left_to_next; - vlib_get_next_frame (vm, node, next_index, - to_next, n_left_to_next); + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); while (n_left_from > 0 && n_left_to_next > 0) { - u32 bi0; - vlib_buffer_t * b0; - u32 next0; - - /* speculatively enqueue b0 to the current next frame */ + u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0; + vlib_buffer_t *b0; + u32 next0; + u8 cached0 = 0; + ip4_header_t *ip0; + nat_reass_ip4_t *reass0; + udp_header_t *udp0; + tcp_header_t *tcp0; + icmp46_header_t *icmp0; + snat_session_key_t key0; + clib_bihash_kv_8_8_t kv0, value0; + snat_session_t *s0 = 0; + u16 old_port0, new_port0; + ip_csum_t sum0; + + /* speculatively enqueue b0 to the current next frame */ bi0 = from[0]; to_next[0] = bi0; from += 1; @@ -3211,64 +1747,262 @@ snat_hairpin_src_fn (vlib_main_t * vm, n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); - next0 = SNAT_HAIRPIN_SRC_NEXT_INTERFACE_OUTPUT; + next0 = SNAT_IN2OUT_NEXT_LOOKUP; - if (PREDICT_FALSE ((vnet_buffer (b0)->snat.flags) & SNAT_FLAG_HAIRPINNING)) - { - if (PREDICT_TRUE (sm->num_workers > 1)) - next0 = SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT_WH; - else - next0 = SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT; - } + 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 (nat_reass_is_drop_frag (0))) + { + next0 = SNAT_IN2OUT_NEXT_DROP; + b0->error = node->errors[SNAT_IN2OUT_ERROR_DROP_FRAGMENT]; + goto trace0; + } - pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP; + ip0 = (ip4_header_t *) vlib_buffer_get_current (b0); + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + icmp0 = (icmp46_header_t *) udp0; + proto0 = ip_proto_to_snat_proto (ip0->protocol); - /* 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); - } + reass0 = nat_ip4_reass_find_or_create (ip0->src_address, + ip0->dst_address, + ip0->fragment_id, + ip0->protocol, + 1, &fragments_to_drop); + + if (PREDICT_FALSE (!reass0)) + { + next0 = SNAT_IN2OUT_NEXT_DROP; + b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_REASS]; + nat_log_notice ("maximum reassemblies exceeded"); + goto trace0; + } + + if (PREDICT_FALSE (ip4_is_first_fragment (ip0))) + { + if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) + { + next0 = icmp_in2out_slow_path + (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, + next0, now, thread_index, &s0); + + if (PREDICT_TRUE (next0 != SNAT_IN2OUT_NEXT_DROP)) + { + if (s0) + reass0->sess_index = s0 - per_thread_data->sessions; + else + reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE; + nat_ip4_reass_get_frags (reass0, + &fragments_to_loopback); + } + + goto trace0; + } + + key0.addr = ip0->src_address; + key0.port = udp0->src_port; + key0.protocol = proto0; + key0.fib_index = rx_fib_index0; + kv0.key = key0.as_u64; + + if (clib_bihash_search_8_8 + (&per_thread_data->in2out, &kv0, &value0)) + { + 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, now); + + if (PREDICT_FALSE (next0 == SNAT_IN2OUT_NEXT_DROP)) + goto trace0; + + if (PREDICT_FALSE (!s0)) + goto trace0; + + reass0->sess_index = s0 - per_thread_data->sessions; + } + else + { + s0 = pool_elt_at_index (per_thread_data->sessions, + value0.value); + reass0->sess_index = value0.value; + } + nat_ip4_reass_get_frags (reass0, &fragments_to_loopback); + } + else + { + if (PREDICT_FALSE (reass0->sess_index == (u32) ~ 0)) + { + if (nat_ip4_reass_add_fragment + (thread_index, reass0, bi0, &fragments_to_drop)) + { + b0->error = node->errors[SNAT_IN2OUT_ERROR_MAX_FRAG]; + nat_log_notice + ("maximum fragments per reassembly exceeded"); + next0 = SNAT_IN2OUT_NEXT_DROP; + goto trace0; + } + cached0 = 1; + goto trace0; + } + s0 = pool_elt_at_index (per_thread_data->sessions, + reass0->sess_index); + } + + old_addr0 = ip0->src_address.as_u32; + ip0->src_address = s0->out2in.addr; + new_addr0 = ip0->src_address.as_u32; + vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->out2in.fib_index; + + sum0 = ip0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, + src_address /* changed member */ ); + ip0->checksum = ip_csum_fold (sum0); + + if (PREDICT_FALSE (ip4_is_first_fragment (ip0))) + { + if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) + { + old_port0 = tcp0->src_port; + 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); + } + 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, 0); + + /* Accounting */ + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (vm, b0), + thread_index); + /* Per-user LRU list maintenance */ + nat44_session_update_lru (sm, s0, thread_index); + + trace0: + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + nat44_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--; + cached_fragments++; + } + 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_fast (from, fragments_to_loopback, + sizeof (u32) * len); + n_left_from = len; + vec_reset_length (fragments_to_loopback); + } + else + { + clib_memcpy_fast (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, snat_hairpin_src_node.index, - SNAT_IN2OUT_ERROR_IN2OUT_PACKETS, - pkts_processed); + vlib_node_increment_counter (vm, sm->in2out_reass_node_index, + SNAT_IN2OUT_ERROR_PROCESSED_FRAGMENTS, + pkts_processed); + vlib_node_increment_counter (vm, sm->in2out_reass_node_index, + SNAT_IN2OUT_ERROR_CACHED_FRAGMENTS, + cached_fragments); + + 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 (snat_hairpin_src_node) = { - .function = snat_hairpin_src_fn, - .name = "nat44-hairpin-src", +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (nat44_in2out_reass_node) = { + .name = "nat44-in2out-reass", .vector_size = sizeof (u32), + .format_trace = format_nat44_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_HAIRPIN_SRC_N_NEXT, + + .n_next_nodes = SNAT_IN2OUT_N_NEXT, .next_nodes = { - [SNAT_HAIRPIN_SRC_NEXT_DROP] = "error-drop", - [SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT] = "nat44-in2out-output", - [SNAT_HAIRPIN_SRC_NEXT_INTERFACE_OUTPUT] = "interface-output", - [SNAT_HAIRPIN_SRC_NEXT_SNAT_IN2OUT_WH] = "nat44-in2out-output-worker-handoff", + [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", }, }; +/* *INDENT-ON* */ -VLIB_NODE_FUNCTION_MULTIARCH (snat_hairpin_src_node, - snat_hairpin_src_fn); - -static uword -snat_in2out_fast_static_map_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) +VLIB_NODE_FN (snat_in2out_fast_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) { - u32 n_left_from, * from, * to_next; + u32 n_left_from, *from, *to_next; snat_in2out_next_t next_index; u32 pkts_processed = 0; - snat_main_t * sm = &snat_main; + snat_main_t *sm = &snat_main; u32 stats_node_index; - stats_node_index = snat_in2out_fast_node.index; + stats_node_index = sm->in2out_fast_node_index; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; @@ -3278,27 +2012,26 @@ snat_in2out_fast_static_map_fn (vlib_main_t * vm, { u32 n_left_to_next; - vlib_get_next_frame (vm, node, next_index, - to_next, n_left_to_next); + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); while (n_left_from > 0 && n_left_to_next > 0) { - u32 bi0; - vlib_buffer_t * b0; - u32 next0; - u32 sw_if_index0; - ip4_header_t * ip0; - ip_csum_t sum0; - u32 new_addr0, old_addr0; - u16 old_port0, new_port0; - udp_header_t * udp0; - tcp_header_t * tcp0; - icmp46_header_t * icmp0; - snat_session_key_t key0, sm0; - u32 proto0; - u32 rx_fib_index0; - - /* speculatively enqueue b0 to the current next frame */ + u32 bi0; + vlib_buffer_t *b0; + u32 next0; + u32 sw_if_index0; + ip4_header_t *ip0; + ip_csum_t sum0; + u32 new_addr0, old_addr0; + u16 old_port0, new_port0; + udp_header_t *udp0; + tcp_header_t *tcp0; + icmp46_header_t *icmp0; + snat_session_key_t key0, sm0; + u32 proto0; + u32 rx_fib_index0; + + /* speculatively enqueue b0 to the current next frame */ bi0 = from[0]; to_next[0] = bi0; from += 1; @@ -3307,113 +2040,116 @@ snat_in2out_fast_static_map_fn (vlib_main_t * vm, n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); - next0 = SNAT_IN2OUT_NEXT_LOOKUP; + next0 = SNAT_IN2OUT_NEXT_LOOKUP; - ip0 = vlib_buffer_get_current (b0); - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; + ip0 = vlib_buffer_get_current (b0); + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + icmp0 = (icmp46_header_t *) udp0; - sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; - rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index(sw_if_index0); + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + rx_fib_index0 = + ip4_fib_table_get_index_for_sw_if_index (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; - } + 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; + } - proto0 = ip_proto_to_snat_proto (ip0->protocol); + proto0 = ip_proto_to_snat_proto (ip0->protocol); - if (PREDICT_FALSE (proto0 == ~0)) - goto trace0; + if (PREDICT_FALSE (proto0 == ~0)) + goto trace0; - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = icmp_in2out(sm, b0, ip0, icmp0, sw_if_index0, - rx_fib_index0, node, next0, ~0, 0, 0); - goto trace0; - } + if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) + { + next0 = icmp_in2out (sm, b0, ip0, icmp0, sw_if_index0, + rx_fib_index0, node, next0, ~0, 0, 0); + goto trace0; + } - key0.addr = ip0->src_address; - key0.protocol = proto0; - key0.port = udp0->src_port; - key0.fib_index = rx_fib_index0; + key0.addr = ip0->src_address; + key0.protocol = proto0; + key0.port = udp0->src_port; + key0.fib_index = rx_fib_index0; - if (snat_static_mapping_match(sm, key0, &sm0, 0, 0)) - { - b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION]; - next0= SNAT_IN2OUT_NEXT_DROP; - goto trace0; - } + if (snat_static_mapping_match (sm, key0, &sm0, 0, 0, 0, 0, 0, 0)) + { + b0->error = node->errors[SNAT_IN2OUT_ERROR_NO_TRANSLATION]; + next0 = SNAT_IN2OUT_NEXT_DROP; + goto trace0; + } - new_addr0 = sm0.addr.as_u32; - new_port0 = sm0.port; - vnet_buffer(b0)->sw_if_index[VLIB_TX] = sm0.fib_index; - old_addr0 = ip0->src_address.as_u32; - ip0->src_address.as_u32 = new_addr0; + new_addr0 = sm0.addr.as_u32; + new_port0 = sm0.port; + vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm0.fib_index; + old_addr0 = ip0->src_address.as_u32; + ip0->src_address.as_u32 = new_addr0; - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - src_address /* changed member */); - ip0->checksum = ip_csum_fold (sum0); + sum0 = ip0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, + src_address /* changed member */ ); + ip0->checksum = ip_csum_fold (sum0); - if (PREDICT_FALSE(new_port0 != udp0->dst_port)) - { - if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP)) - { - old_port0 = tcp0->src_port; - tcp0->src_port = new_port0; - - 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 = new_port0; - udp0->checksum = 0; - } - } - else - { - if (PREDICT_TRUE(proto0 == SNAT_PROTOCOL_TCP)) - { - sum0 = tcp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */); - tcp0->checksum = ip_csum_fold(sum0); - } - } + if (PREDICT_FALSE (new_port0 != udp0->dst_port)) + { + if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) + { + old_port0 = tcp0->src_port; + tcp0->src_port = new_port0; + + 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 */ ); + mss_clamping (sm, tcp0, &sum0); + tcp0->checksum = ip_csum_fold (sum0); + } + else + { + old_port0 = udp0->src_port; + udp0->src_port = new_port0; + udp0->checksum = 0; + } + } + else + { + if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) + { + sum0 = tcp0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, + dst_address /* changed member */ ); + mss_clamping (sm, tcp0, &sum0); + tcp0->checksum = ip_csum_fold (sum0); + } + } - /* Hairpinning */ - snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0); + /* Hairpinning */ + snat_hairpinning (sm, b0, ip0, udp0, tcp0, proto0, 0); - trace0: - 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->sw_if_index = sw_if_index0; - t->next_index = next0; - } + trace0: + 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->sw_if_index = sw_if_index0; + t->next_index = next0; + } - pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP; + pkts_processed += next0 != SNAT_IN2OUT_NEXT_DROP; - /* verify speculative enqueue, maybe switch current next frame */ + /* 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); @@ -3423,14 +2159,14 @@ snat_in2out_fast_static_map_fn (vlib_main_t * vm, } vlib_node_increment_counter (vm, stats_node_index, - SNAT_IN2OUT_ERROR_IN2OUT_PACKETS, - pkts_processed); + SNAT_IN2OUT_ERROR_IN2OUT_PACKETS, + pkts_processed); return frame->n_vectors; } +/* *INDENT-OFF* */ VLIB_REGISTER_NODE (snat_in2out_fast_node) = { - .function = snat_in2out_fast_static_map_fn, .name = "nat44-in2out-fast", .vector_size = sizeof (u32), .format_trace = format_snat_in2out_fast_trace, @@ -3449,7 +2185,15 @@ VLIB_REGISTER_NODE (snat_in2out_fast_node) = { [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", }, }; +/* *INDENT-ON* */ -VLIB_NODE_FUNCTION_MULTIARCH (snat_in2out_fast_node, snat_in2out_fast_static_map_fn); +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */