X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fnat%2Fnat44-ed%2Fnat44_ed.c;h=8f356430e208bdbe05ab461f53cfdb30935589db;hb=c2feb65f4288cb4f3aa1e61d44826dbb5675063b;hp=0d62e788ec11d637ed1dbd2b95e7d840d538efa2;hpb=76401c5767ecdf701f4c77beee0b721c485321d5;p=vpp.git diff --git a/src/plugins/nat/nat44-ed/nat44_ed.c b/src/plugins/nat/nat44-ed/nat44_ed.c index 0d62e788ec1..8f356430e20 100644 --- a/src/plugins/nat/nat44-ed/nat44_ed.c +++ b/src/plugins/nat/nat44-ed/nat44_ed.c @@ -28,14 +28,18 @@ #include #include -#include #include #include +#include +#include +#include #include #include #include +#include + snat_main_t snat_main; static_always_inline void nat_validate_interface_counters (snat_main_t *sm, @@ -74,7 +78,6 @@ static_always_inline void nat_validate_interface_counters (snat_main_t *sm, } \ while (0) -/* *INDENT-OFF* */ /* Hook up input features */ VNET_FEATURE_INIT (nat_pre_in2out, static) = { .arc_name = "ip4-unicast", @@ -148,12 +151,14 @@ VNET_FEATURE_INIT (ip4_snat_out2in_fast, static) = { VNET_FEATURE_INIT (ip4_snat_in2out_output, static) = { .arc_name = "ip4-output", .node_name = "nat44-in2out-output", - .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa","ip4-sv-reassembly-output-feature"), + .runs_after = VNET_FEATURES ("ip4-sv-reassembly-output-feature"), + .runs_before = VNET_FEATURES ("acl-plugin-out-ip4-fa"), }; VNET_FEATURE_INIT (ip4_snat_in2out_output_worker_handoff, static) = { .arc_name = "ip4-output", .node_name = "nat44-in2out-output-worker-handoff", - .runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa","ip4-sv-reassembly-output-feature"), + .runs_after = VNET_FEATURES ("ip4-sv-reassembly-output-feature"), + .runs_before = VNET_FEATURES ("acl-plugin-out-ip4-fa"), }; VNET_FEATURE_INIT (nat_pre_in2out_output, static) = { .arc_name = "ip4-output", @@ -172,44 +177,22 @@ VLIB_PLUGIN_REGISTER () = { .version = VPP_BUILD_VER, .description = "Network Address Translation (NAT)", }; -/* *INDENT-ON* */ static void nat44_ed_db_init (u32 translations, u32 translation_buckets); - -static void nat44_ed_db_free (); - -static u32 -nat44_ed_get_worker_out2in_cb (vlib_buffer_t * b, ip4_header_t * ip, - u32 rx_fib_index, u8 is_output); - -static u32 nat44_ed_get_worker_in2out_cb (vlib_buffer_t *b, ip4_header_t *ip, - u32 rx_fib_index, u8 is_output); +static void nat44_ed_worker_db_free (snat_main_per_thread_data_t *tsm); + +static int nat44_ed_add_static_mapping_internal ( + ip4_address_t l_addr, ip4_address_t e_addr, u16 l_port, u16 e_port, + ip_protocol_t proto, u32 vrf_id, u32 sw_if_index, u32 flags, + ip4_address_t pool_addr, u8 *tag); +static int nat44_ed_del_static_mapping_internal (ip4_address_t l_addr, + ip4_address_t e_addr, + u16 l_port, u16 e_port, + ip_protocol_t proto, + u32 vrf_id, u32 flags); u32 nat_calc_bihash_buckets (u32 n_elts); -u8 * -format_session_kvp (u8 * s, va_list * args) -{ - clib_bihash_kv_8_8_t *v = va_arg (*args, clib_bihash_kv_8_8_t *); - - s = format (s, "%U thread-index %llu session-index %llu", format_snat_key, - v->key, nat_value_get_thread_index (v), - nat_value_get_session_index (v)); - - return s; -} - -u8 * -format_static_mapping_kvp (u8 * s, va_list * args) -{ - clib_bihash_kv_8_8_t *v = va_arg (*args, clib_bihash_kv_8_8_t *); - - s = format (s, "%U static-mapping-index %llu", - format_snat_key, v->key, v->value); - - return s; -} - u8 * format_ed_session_kvp (u8 * s, va_list * args) { @@ -232,887 +215,1199 @@ format_ed_session_kvp (u8 * s, va_list * args) return s; } +static_always_inline int +nat44_ed_sm_i2o_add (snat_main_t *sm, snat_static_mapping_t *m, + ip4_address_t addr, u16 port, u32 fib_index, u8 proto) +{ + ASSERT (!pool_is_free (sm->static_mappings, m)); + clib_bihash_kv_16_8_t kv; + nat44_ed_sm_init_i2o_kv (&kv, addr.as_u32, port, fib_index, proto, + m - sm->static_mappings); + return clib_bihash_add_del_16_8 (&sm->flow_hash, &kv, 1 /*is_add*/); +} + +static_always_inline int +nat44_ed_sm_i2o_del (snat_main_t *sm, ip4_address_t addr, u16 port, + u32 fib_index, u8 proto) +{ + clib_bihash_kv_16_8_t kv; + nat44_ed_sm_init_i2o_k (&kv, addr.as_u32, port, fib_index, proto); + return clib_bihash_add_del_16_8 (&sm->flow_hash, &kv, 0 /*is_add*/); +} + +static_always_inline int +nat44_ed_sm_o2i_add (snat_main_t *sm, snat_static_mapping_t *m, + ip4_address_t addr, u16 port, u32 fib_index, u8 proto) +{ + ASSERT (!pool_is_free (sm->static_mappings, m)); + clib_bihash_kv_16_8_t kv; + nat44_ed_sm_init_o2i_kv (&kv, addr.as_u32, port, fib_index, proto, + m - sm->static_mappings); + return clib_bihash_add_del_16_8 (&sm->flow_hash, &kv, 1 /*is_add*/); +} + +static_always_inline int +nat44_ed_sm_o2i_del (snat_main_t *sm, ip4_address_t addr, u16 port, + u32 fib_index, u8 proto) +{ + clib_bihash_kv_16_8_t kv; + nat44_ed_sm_init_o2i_k (&kv, addr.as_u32, port, fib_index, proto); + return clib_bihash_add_del_16_8 (&sm->flow_hash, &kv, 0 /*is_add*/); +} + void -nat_free_session_data (snat_main_t * sm, snat_session_t * s, u32 thread_index, - u8 is_ha) +nat44_ed_free_session_data (snat_main_t *sm, snat_session_t *s, + u32 thread_index, u8 is_ha) { - per_vrf_sessions_unregister_session (s, thread_index); + per_vrf_sessions_unregister_session (s, thread_index); - if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 0)) - nat_elog_warn (sm, "flow hash del failed"); + if (nat_ed_ses_i2o_flow_hash_add_del (sm, thread_index, s, 0)) + nat_elog_warn (sm, "flow hash del failed"); - if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 0)) - nat_elog_warn (sm, "flow hash del failed"); + if (nat_ed_ses_o2i_flow_hash_add_del (sm, thread_index, s, 0)) + nat_elog_warn (sm, "flow hash del failed"); - if (is_fwd_bypass_session (s)) + if (na44_ed_is_fwd_bypass_session (s)) { return; } - if (is_affinity_sessions (s)) - nat_affinity_unlock (s->ext_host_addr, s->out2in.addr, - s->nat_proto, s->out2in.port); + if (nat44_ed_is_affinity_session (s)) + nat_affinity_unlock (s->ext_host_addr, s->out2in.addr, s->proto, + s->out2in.port); - if (!is_ha) - nat_syslog_nat44_sdel ( - 0, s->in2out.fib_index, &s->in2out.addr, s->in2out.port, - &s->ext_host_nat_addr, s->ext_host_nat_port, &s->out2in.addr, - s->out2in.port, &s->ext_host_addr, s->ext_host_port, s->nat_proto, - is_twice_nat_session (s)); - - if (snat_is_unk_proto_session (s)) - return; + if (!is_ha) + nat_syslog_nat44_sdel (0, s->in2out.fib_index, &s->in2out.addr, + s->in2out.port, &s->ext_host_nat_addr, + s->ext_host_nat_port, &s->out2in.addr, + s->out2in.port, &s->ext_host_addr, s->ext_host_port, + s->proto, nat44_ed_is_twice_nat_session (s)); if (!is_ha) { /* log NAT event */ - nat_ipfix_logging_nat44_ses_delete (thread_index, - s->in2out.addr.as_u32, - s->out2in.addr.as_u32, - s->nat_proto, - s->in2out.port, - s->out2in.port, - s->in2out.fib_index); - } - - /* Twice NAT address and port for external host */ - if (is_twice_nat_session (s)) - { - snat_free_outside_address_and_port (sm->twice_nat_addresses, - thread_index, - &s->ext_host_nat_addr, - s->ext_host_nat_port, s->nat_proto); + nat_ipfix_logging_nat44_ses_delete ( + thread_index, s->in2out.addr.as_u32, s->out2in.addr.as_u32, s->proto, + s->in2out.port, s->out2in.port, s->in2out.fib_index); } - - if (snat_is_session_static (s)) - return; - - snat_free_outside_address_and_port (sm->addresses, thread_index, - &s->out2in.addr, s->out2in.port, - s->nat_proto); } -void -snat_add_del_addr_to_fib (ip4_address_t * addr, u8 p_len, u32 sw_if_index, - int is_add) +static ip_interface_address_t * +nat44_ed_get_ip_interface_address (u32 sw_if_index, ip4_address_t addr) { snat_main_t *sm = &snat_main; - fib_prefix_t prefix = { - .fp_len = p_len, - .fp_proto = FIB_PROTOCOL_IP4, - .fp_addr = { - .ip4.as_u32 = addr->as_u32, - }, - }; - u32 fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index); - if (is_add) - fib_table_entry_update_one_path (fib_index, - &prefix, - sm->fib_src_low, - (FIB_ENTRY_FLAG_CONNECTED | - FIB_ENTRY_FLAG_LOCAL | - FIB_ENTRY_FLAG_EXCLUSIVE), - DPO_PROTO_IP4, - NULL, - sw_if_index, - ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE); - else - fib_table_entry_delete (fib_index, &prefix, sm->fib_src_low); + ip_lookup_main_t *lm = &sm->ip4_main->lookup_main; + ip_interface_address_t *ia; + ip4_address_t *ip4a; + + foreach_ip_interface_address ( + lm, ia, sw_if_index, 1, ({ + ip4a = ip_interface_address_get_address (lm, ia); + nat_log_debug ("sw_if_idx: %u addr: %U ? %U", sw_if_index, + format_ip4_address, ip4a, format_ip4_address, &addr); + if (ip4a->as_u32 == addr.as_u32) + { + return ia; + } + })); + return NULL; } -int -snat_add_address (snat_main_t * sm, ip4_address_t * addr, u32 vrf_id, - u8 twice_nat) +static int +nat44_ed_resolve_nat_addr_len (snat_address_t *ap, + snat_interface_t *interfaces) { - snat_address_t *ap; + ip_interface_address_t *ia; snat_interface_t *i; - vlib_thread_main_t *tm = vlib_get_thread_main (); + u32 fib_index; - /* Check if address already exists */ - /* *INDENT-OFF* */ - vec_foreach (ap, twice_nat ? sm->twice_nat_addresses : sm->addresses) + pool_foreach (i, interfaces) { - if (ap->addr.as_u32 == addr->as_u32) - { - nat_log_err ("address exist"); - return VNET_API_ERROR_VALUE_EXIST; - } - } - /* *INDENT-ON* */ - - if (twice_nat) - vec_add2 (sm->twice_nat_addresses, ap, 1); - else - vec_add2 (sm->addresses, ap, 1); - - ap->addr = *addr; - if (vrf_id != ~0) - ap->fib_index = - fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id, - sm->fib_src_low); - else - ap->fib_index = ~0; - - /* *INDENT-OFF* */ - #define _(N, i, n, s) \ - clib_memset(ap->busy_##n##_port_refcounts, 0, sizeof(ap->busy_##n##_port_refcounts));\ - ap->busy_##n##_ports = 0; \ - ap->busy_##n##_ports_per_thread = 0;\ - vec_validate_init_empty (ap->busy_##n##_ports_per_thread, tm->n_vlib_mains - 1, 0); - foreach_nat_protocol - #undef _ - /* *INDENT-ON* */ + if (!nat44_ed_is_interface_outside (i)) + { + continue; + } - if (twice_nat) - return 0; + fib_index = ip4_fib_table_get_index_for_sw_if_index (i->sw_if_index); + if (fib_index != ap->fib_index) + { + continue; + } - /* Add external address to FIB */ - /* *INDENT-OFF* */ - pool_foreach (i, sm->interfaces) - { - if (nat_interface_is_inside (i)) - continue; + if ((ia = nat44_ed_get_ip_interface_address (i->sw_if_index, ap->addr))) + { + ap->addr_len = ia->address_length; + ap->sw_if_index = i->sw_if_index; + ap->net.as_u32 = (ap->addr.as_u32 >> (32 - ap->addr_len)) + << (32 - ap->addr_len); + + nat_log_debug ("pool addr %U binds to -> sw_if_idx: %u net: %U/%u", + format_ip4_address, &ap->addr, ap->sw_if_index, + format_ip4_address, &ap->net, ap->addr_len); + return 0; + } + } + return 1; +} - snat_add_del_addr_to_fib (addr, 32, i->sw_if_index, 1); - break; - } - pool_foreach (i, sm->output_feature_interfaces) - { - if (nat_interface_is_inside (i)) - continue; +static void +nat44_ed_update_outside_if_addresses (snat_address_t *ap) +{ + snat_main_t *sm = &snat_main; - snat_add_del_addr_to_fib (addr, 32, i->sw_if_index, 1); - break; - } - /* *INDENT-ON* */ + if (!nat44_ed_resolve_nat_addr_len (ap, sm->interfaces)) + { + return; + } - return 0; + if (!nat44_ed_resolve_nat_addr_len (ap, sm->output_feature_interfaces)) + { + return; + } } -static int -is_snat_address_used_in_static_mapping (snat_main_t * sm, ip4_address_t addr) +static void +nat44_ed_bind_if_addr_to_nat_addr (u32 sw_if_index) { - snat_static_mapping_t *m; - /* *INDENT-OFF* */ - pool_foreach (m, sm->static_mappings) - { - if (is_addr_only_static_mapping (m) || - is_out2in_only_static_mapping (m) || - is_identity_static_mapping (m)) - continue; - if (m->external_addr.as_u32 == addr.as_u32) - return 1; - } - /* *INDENT-ON* */ + snat_main_t *sm = &snat_main; + ip_interface_address_t *ia; + snat_address_t *ap; - return 0; -} + u32 fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index); -static void -snat_add_static_mapping_when_resolved (snat_main_t *sm, ip4_address_t l_addr, - u16 l_port, u32 sw_if_index, u16 e_port, - u32 vrf_id, nat_protocol_t proto, - int addr_only, u8 *tag, int twice_nat, - int out2in_only, int identity_nat, - ip4_address_t pool_addr, int exact) -{ - snat_static_map_resolve_t *rp; - - vec_add2 (sm->to_resolve, rp, 1); - rp->l_addr.as_u32 = l_addr.as_u32; - rp->l_port = l_port; - rp->sw_if_index = sw_if_index; - rp->e_port = e_port; - rp->vrf_id = vrf_id; - rp->proto = proto; - rp->addr_only = addr_only; - rp->twice_nat = twice_nat; - rp->out2in_only = out2in_only; - rp->identity_nat = identity_nat; - rp->tag = vec_dup (tag); - rp->pool_addr = pool_addr; - rp->exact = exact; + vec_foreach (ap, sm->addresses) + { + if (fib_index != ap->fib_index) + { + continue; + } + + if ((ia = nat44_ed_get_ip_interface_address (sw_if_index, ap->addr))) + { + ap->addr_len = ia->address_length; + ap->sw_if_index = sw_if_index; + ap->net.as_u32 = (ap->addr.as_u32 >> (32 - ap->addr_len)) + << (32 - ap->addr_len); + + nat_log_debug ("pool addr %U binds to -> sw_if_idx: %u net: %U/%u", + format_ip4_address, &ap->addr, ap->sw_if_index, + format_ip4_address, &ap->net, ap->addr_len); + return; + } + } } -u32 -get_thread_idx_by_port (u16 e_port) +static_always_inline snat_fib_entry_reg_t * +nat44_ed_get_fib_entry_reg (ip4_address_t addr, u32 sw_if_index, int *out_idx) { snat_main_t *sm = &snat_main; - u32 thread_idx = sm->num_workers; - if (sm->num_workers > 1) + snat_fib_entry_reg_t *fe; + int i; + + for (i = 0; i < vec_len (sm->fib_entry_reg); i++) { - thread_idx = - sm->first_worker_index + - sm->workers[(e_port - 1024) / sm->port_per_thread]; + fe = sm->fib_entry_reg + i; + if ((addr.as_u32 == fe->addr.as_u32) && (sw_if_index == fe->sw_if_index)) + { + if (out_idx) + { + *out_idx = i; + } + return fe; + } } - return thread_idx; + return NULL; } -void -nat_ed_static_mapping_del_sessions (snat_main_t * sm, - snat_main_per_thread_data_t * tsm, - ip4_address_t l_addr, - u16 l_port, - u8 protocol, - u32 fib_index, int addr_only, - ip4_address_t e_addr, u16 e_port) +static void +nat44_ed_add_fib_entry_reg (ip4_address_t addr, u32 sw_if_index) { - snat_session_t *s; - u32 *indexes_to_free = NULL; - /* *INDENT-OFF* */ - pool_foreach (s, tsm->sessions) { - if (s->in2out.fib_index != fib_index || - s->in2out.addr.as_u32 != l_addr.as_u32) - { - continue; - } - if (!addr_only) - { - if ((s->out2in.addr.as_u32 != e_addr.as_u32) || - s->out2in.port != e_port || - s->in2out.port != l_port || - s->nat_proto != protocol) - continue; - } + // Add the external NAT address to the FIB as receive entries. This ensures + // that VPP will reply to ARP for this address and we don't need to enable + // proxy ARP on the outside interface. + snat_main_t *sm = &snat_main; + snat_fib_entry_reg_t *fe; - if (is_lb_session (s)) - continue; - if (!snat_is_session_static (s)) - continue; - nat_free_session_data (sm, s, tsm - sm->per_thread_data, 0); - vec_add1 (indexes_to_free, s - tsm->sessions); - if (!addr_only) - break; - } - /* *INDENT-ON* */ - u32 *ses_index; - vec_foreach (ses_index, indexes_to_free) - { - s = pool_elt_at_index (tsm->sessions, *ses_index); - nat_ed_session_delete (sm, s, tsm - sm->per_thread_data, 1); - } - vec_free (indexes_to_free); + if (!(fe = nat44_ed_get_fib_entry_reg (addr, sw_if_index, 0))) + { + fib_prefix_t prefix = { + .fp_len = 32, + .fp_proto = FIB_PROTOCOL_IP4, + .fp_addr = { + .ip4.as_u32 = addr.as_u32, + }, + }; + u32 fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index); + fib_table_entry_update_one_path (fib_index, &prefix, sm->fib_src_low, + (FIB_ENTRY_FLAG_CONNECTED | + FIB_ENTRY_FLAG_LOCAL | + FIB_ENTRY_FLAG_EXCLUSIVE), + DPO_PROTO_IP4, NULL, sw_if_index, ~0, 1, + NULL, FIB_ROUTE_PATH_FLAG_NONE); + + vec_add2 (sm->fib_entry_reg, fe, 1); + clib_memset (fe, 0, sizeof (*fe)); + fe->addr.as_u32 = addr.as_u32; + fe->sw_if_index = sw_if_index; + } + fe->count++; } -int -snat_add_static_mapping (ip4_address_t l_addr, ip4_address_t e_addr, - u16 l_port, u16 e_port, u32 vrf_id, int addr_only, - u32 sw_if_index, nat_protocol_t proto, int is_add, - twice_nat_type_t twice_nat, u8 out2in_only, u8 *tag, - u8 identity_nat, ip4_address_t pool_addr, int exact) +static void +nat44_ed_del_fib_entry_reg (ip4_address_t addr, u32 sw_if_index) { snat_main_t *sm = &snat_main; - snat_static_mapping_t *m; - clib_bihash_kv_8_8_t kv, value; - snat_address_t *a = 0; - u32 fib_index = ~0; - snat_interface_t *interface; - snat_main_per_thread_data_t *tsm; - snat_static_map_resolve_t *rp, *rp_match = 0; - nat44_lb_addr_port_t *local; - u32 find = ~0; + snat_fib_entry_reg_t *fe; int i; - /* If the external address is a specific interface address */ - if (sw_if_index != ~0) + if ((fe = nat44_ed_get_fib_entry_reg (addr, sw_if_index, &i))) { - ip4_address_t *first_int_addr; - - for (i = 0; i < vec_len (sm->to_resolve); i++) + fe->count--; + if (0 == fe->count) { - rp = sm->to_resolve + i; - if (rp->sw_if_index != sw_if_index || - rp->l_addr.as_u32 != l_addr.as_u32 || - rp->vrf_id != vrf_id || rp->addr_only != addr_only) - continue; - - if (!addr_only) - { - if ((rp->l_port != l_port && rp->e_port != e_port) - || rp->proto != proto) - continue; - } - - rp_match = rp; - break; + fib_prefix_t prefix = { + .fp_len = 32, + .fp_proto = FIB_PROTOCOL_IP4, + .fp_addr = { + .ip4.as_u32 = addr.as_u32, + }, + }; + u32 fib_index = + ip4_fib_table_get_index_for_sw_if_index (sw_if_index); + fib_table_entry_delete (fib_index, &prefix, sm->fib_src_low); + vec_del1 (sm->fib_entry_reg, i); } + } +} - /* Might be already set... */ - first_int_addr = ip4_interface_first_address - (sm->ip4_main, sw_if_index, 0 /* just want the address */ ); +static void +nat44_ed_add_del_interface_fib_reg_entries (ip4_address_t addr, u8 is_add) +{ + snat_main_t *sm = &snat_main; + snat_interface_t *i; - if (is_add) + pool_foreach (i, sm->interfaces) + { + if (nat44_ed_is_interface_outside (i)) { - if (rp_match) - return VNET_API_ERROR_VALUE_EXIST; - - snat_add_static_mapping_when_resolved ( - sm, l_addr, l_port, sw_if_index, e_port, vrf_id, proto, addr_only, - tag, twice_nat, out2in_only, identity_nat, pool_addr, exact); - - /* DHCP resolution required? */ - if (first_int_addr == 0) + if (is_add) { - return 0; + nat44_ed_add_fib_entry_reg (addr, i->sw_if_index); } else { - e_addr.as_u32 = first_int_addr->as_u32; - /* Identity mapping? */ - if (l_addr.as_u32 == 0) - l_addr.as_u32 = e_addr.as_u32; + nat44_ed_del_fib_entry_reg (addr, i->sw_if_index); } } - else + } + pool_foreach (i, sm->output_feature_interfaces) + { + if (nat44_ed_is_interface_outside (i)) { - if (!rp_match) - return VNET_API_ERROR_NO_SUCH_ENTRY; - - vec_del1 (sm->to_resolve, i); - - if (first_int_addr) + if (is_add) { - e_addr.as_u32 = first_int_addr->as_u32; - /* Identity mapping? */ - if (l_addr.as_u32 == 0) - l_addr.as_u32 = e_addr.as_u32; + nat44_ed_add_fib_entry_reg (addr, i->sw_if_index); } else - return 0; + { + nat44_ed_del_fib_entry_reg (addr, i->sw_if_index); + } } } +} - init_nat_k (&kv, e_addr, addr_only ? 0 : e_port, 0, addr_only ? 0 : proto); - if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) - m = 0; - else - m = pool_elt_at_index (sm->static_mappings, value.value); +static_always_inline void +nat44_ed_add_del_nat_addr_fib_reg_entries (u32 sw_if_index, u8 is_add) +{ + snat_main_t *sm = &snat_main; + snat_address_t *ap; - if (is_add) + vec_foreach (ap, sm->addresses) { - if (m) + if (is_add) { - if (is_identity_static_mapping (m)) - { - /* *INDENT-OFF* */ - pool_foreach (local, m->locals) - { - if (local->vrf_id == vrf_id) - return VNET_API_ERROR_VALUE_EXIST; - } - /* *INDENT-ON* */ - pool_get (m->locals, local); - local->vrf_id = vrf_id; - local->fib_index = - fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id, - sm->fib_src_low); - init_nat_kv (&kv, m->local_addr, m->local_port, local->fib_index, - m->proto, 0, m - sm->static_mappings); - clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 1); - return 0; - } - else - return VNET_API_ERROR_VALUE_EXIST; + nat44_ed_add_fib_entry_reg (ap->addr, sw_if_index); } - - if (twice_nat && addr_only) - return VNET_API_ERROR_UNSUPPORTED; - - /* Convert VRF id to FIB index */ - if (vrf_id != ~0) - fib_index = - fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id, - sm->fib_src_low); - /* If not specified use inside VRF id from SNAT plugin startup config */ else { - fib_index = sm->inside_fib_index; - vrf_id = sm->inside_vrf_id; - fib_table_lock (fib_index, FIB_PROTOCOL_IP4, sm->fib_src_low); + nat44_ed_del_fib_entry_reg (ap->addr, sw_if_index); } + } +} + +static_always_inline void +nat44_ed_add_del_sm_fib_reg_entries (u32 sw_if_index, u8 is_add) +{ + snat_main_t *sm = &snat_main; + snat_static_mapping_t *m; - if (!(out2in_only || identity_nat)) + pool_foreach (m, sm->static_mappings) + { + if (is_add) { - init_nat_k (&kv, l_addr, addr_only ? 0 : l_port, fib_index, - addr_only ? 0 : proto); - if (!clib_bihash_search_8_8 - (&sm->static_mapping_by_local, &kv, &value)) - return VNET_API_ERROR_VALUE_EXIST; + nat44_ed_add_fib_entry_reg (m->external_addr, sw_if_index); } - - /* Find external address in allocated addresses and reserve port for - address and port pair mapping when dynamic translations enabled */ - if (!(addr_only || sm->static_mapping_only || out2in_only)) + else { - for (i = 0; i < vec_len (sm->addresses); i++) - { - if (sm->addresses[i].addr.as_u32 == e_addr.as_u32) - { - a = sm->addresses + i; - /* External port must be unused */ - switch (proto) - { -#define _(N, j, n, s) \ - case NAT_PROTOCOL_##N: \ - if (a->busy_##n##_port_refcounts[e_port]) \ - return VNET_API_ERROR_INVALID_VALUE; \ - ++a->busy_##n##_port_refcounts[e_port]; \ - if (e_port > 1024) \ - { \ - a->busy_##n##_ports++; \ - a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]++; \ - } \ - break; - foreach_nat_protocol -#undef _ - default : nat_elog_info (sm, "unknown protocol"); - return VNET_API_ERROR_INVALID_VALUE_2; - } - break; - } - } - /* External address must be allocated */ - if (!a && (l_addr.as_u32 != e_addr.as_u32)) - { - if (sw_if_index != ~0) - { - for (i = 0; i < vec_len (sm->to_resolve); i++) - { - rp = sm->to_resolve + i; - if (rp->addr_only) - continue; - if (rp->sw_if_index != sw_if_index && - rp->l_addr.as_u32 != l_addr.as_u32 && - rp->vrf_id != vrf_id && rp->l_port != l_port && - rp->e_port != e_port && rp->proto != proto) - continue; - - vec_del1 (sm->to_resolve, i); - break; + nat44_ed_del_fib_entry_reg (m->external_addr, sw_if_index); + } + } +} + +int +nat44_ed_add_address (ip4_address_t *addr, u32 vrf_id, u8 twice_nat) +{ + snat_main_t *sm = &snat_main; + snat_address_t *ap, *addresses; + + addresses = twice_nat ? sm->twice_nat_addresses : sm->addresses; + + if (!sm->enabled) + { + return VNET_API_ERROR_UNSUPPORTED; + } + + // check if address already exists + vec_foreach (ap, addresses) + { + if (ap->addr.as_u32 == addr->as_u32) + { + nat_log_err ("address exist"); + return VNET_API_ERROR_VALUE_EXIST; + } + } + + if (twice_nat) + { + vec_add2 (sm->twice_nat_addresses, ap, 1); + } + else + { + vec_add2 (sm->addresses, ap, 1); + } + + ap->addr_len = ~0; + ap->fib_index = ~0; + ap->addr = *addr; + + if (vrf_id != ~0) + { + ap->fib_index = fib_table_find_or_create_and_lock ( + FIB_PROTOCOL_IP4, vrf_id, sm->fib_src_low); + } + + if (!twice_nat) + { + // if we don't have enabled interface we don't add address + // to fib + nat44_ed_add_del_interface_fib_reg_entries (*addr, 1); + nat44_ed_update_outside_if_addresses (ap); + } + return 0; +} + +int +nat44_ed_del_address (ip4_address_t addr, u8 twice_nat) +{ + snat_main_t *sm = &snat_main; + snat_address_t *a = 0, *addresses; + snat_session_t *ses; + u32 *ses_to_be_removed = 0, *ses_index; + snat_main_per_thread_data_t *tsm; + int j; + + addresses = twice_nat ? sm->twice_nat_addresses : sm->addresses; + + for (j = 0; j < vec_len (addresses); j++) + { + if (addresses[j].addr.as_u32 == addr.as_u32) + { + a = addresses + j; + break; + } + } + if (!a) + { + nat_log_err ("no such address"); + return VNET_API_ERROR_NO_SUCH_ENTRY; + } + + // delete dynamic sessions only + vec_foreach (tsm, sm->per_thread_data) + { + pool_foreach (ses, tsm->sessions) + { + if (ses->flags & SNAT_SESSION_FLAG_STATIC_MAPPING) + { + continue; + } + if (ses->out2in.addr.as_u32 == addr.as_u32) + { + nat44_ed_free_session_data (sm, ses, tsm - sm->per_thread_data, + 0); + vec_add1 (ses_to_be_removed, ses - tsm->sessions); + } + } + vec_foreach (ses_index, ses_to_be_removed) + { + ses = pool_elt_at_index (tsm->sessions, ses_index[0]); + nat_ed_session_delete (sm, ses, tsm - sm->per_thread_data, 1); + } + vec_free (ses_to_be_removed); + } + + if (!twice_nat) + { + nat44_ed_add_del_interface_fib_reg_entries (addr, 0); + } + + if (a->fib_index != ~0) + { + fib_table_unlock (a->fib_index, FIB_PROTOCOL_IP4, sm->fib_src_low); + } + + if (!twice_nat) + { + vec_del1 (sm->addresses, j); + } + else + { + vec_del1 (sm->twice_nat_addresses, j); + } + + return 0; +} + +u32 +get_thread_idx_by_port (u16 e_port) +{ + snat_main_t *sm = &snat_main; + u32 thread_idx = sm->num_workers; + if (sm->num_workers > 1) + { + thread_idx = + sm->first_worker_index + + sm->workers[(e_port - 1024) / sm->port_per_thread]; + } + return thread_idx; +} + +void +nat_ed_static_mapping_del_sessions (snat_main_t * sm, + snat_main_per_thread_data_t * tsm, + ip4_address_t l_addr, + u16 l_port, + u8 protocol, + u32 fib_index, int addr_only, + ip4_address_t e_addr, u16 e_port) +{ + snat_session_t *s; + u32 *indexes_to_free = NULL; + pool_foreach (s, tsm->sessions) { + if (s->in2out.fib_index != fib_index || + s->in2out.addr.as_u32 != l_addr.as_u32) + { + continue; + } + if (!addr_only) + { + if ((s->out2in.addr.as_u32 != e_addr.as_u32) || + s->out2in.port != e_port || s->in2out.port != l_port || + s->proto != protocol) + continue; + } + + if (nat44_ed_is_lb_session (s)) + continue; + if (!nat44_ed_is_session_static (s)) + continue; + nat44_ed_free_session_data (sm, s, tsm - sm->per_thread_data, 0); + vec_add1 (indexes_to_free, s - tsm->sessions); + if (!addr_only) + break; + } + u32 *ses_index; + vec_foreach (ses_index, indexes_to_free) + { + s = pool_elt_at_index (tsm->sessions, *ses_index); + nat_ed_session_delete (sm, s, tsm - sm->per_thread_data, 1); + } + vec_free (indexes_to_free); +} + +static_always_inline snat_static_mapping_t * +nat44_ed_sm_lookup (snat_main_t *sm, clib_bihash_kv_16_8_t *kv) +{ + clib_bihash_kv_16_8_t v; + int rc = clib_bihash_search_16_8 (&sm->flow_hash, kv, &v); + if (!rc) + { + ASSERT (0 == ed_value_get_thread_index (&v)); + return pool_elt_at_index (sm->static_mappings, + ed_value_get_session_index (&v)); + } + return NULL; +} + +snat_static_mapping_t * +nat44_ed_sm_o2i_lookup (snat_main_t *sm, ip4_address_t addr, u16 port, + u32 fib_index, u8 proto) +{ + clib_bihash_kv_16_8_t kv; + nat44_ed_sm_init_o2i_k (&kv, addr.as_u32, port, fib_index, proto); + return nat44_ed_sm_lookup (sm, &kv); +} + +snat_static_mapping_t * +nat44_ed_sm_i2o_lookup (snat_main_t *sm, ip4_address_t addr, u16 port, + u32 fib_index, u8 proto) +{ + clib_bihash_kv_16_8_t kv; + nat44_ed_sm_init_i2o_k (&kv, addr.as_u32, port, fib_index, proto); + return nat44_ed_sm_lookup (sm, &kv); +} + +static snat_static_mapping_resolve_t * +nat44_ed_get_resolve_record (ip4_address_t l_addr, u16 l_port, u16 e_port, + ip_protocol_t proto, u32 vrf_id, u32 sw_if_index, + u32 flags, int *out_idx) +{ + snat_static_mapping_resolve_t *rp; + snat_main_t *sm = &snat_main; + int i; + + for (i = 0; i < vec_len (sm->sm_to_resolve); i++) + { + rp = sm->sm_to_resolve + i; + + if (rp->sw_if_index == sw_if_index && rp->vrf_id == vrf_id) + { + if (is_sm_identity_nat (rp->flags) && is_sm_identity_nat (flags)) + { + if (!(is_sm_addr_only (rp->flags) && is_sm_addr_only (flags))) + { + if (rp->e_port != e_port || rp->proto != proto) + { + continue; } } - return VNET_API_ERROR_NO_SUCH_ENTRY; } + else if (rp->l_addr.as_u32 == l_addr.as_u32) + { + if (!(is_sm_addr_only (rp->flags) && is_sm_addr_only (flags))) + { + if (rp->l_port != l_port || rp->e_port != e_port || + rp->proto != proto) + { + continue; + } + } + } + else + { + continue; + } + if (out_idx) + { + *out_idx = i; + } + return rp; } + } + return NULL; +} - pool_get (sm->static_mappings, m); - clib_memset (m, 0, sizeof (*m)); - m->tag = vec_dup (tag); - m->local_addr = l_addr; - m->external_addr = e_addr; - m->twice_nat = twice_nat; +static int +nat44_ed_del_resolve_record (ip4_address_t l_addr, u16 l_port, u16 e_port, + ip_protocol_t proto, u32 vrf_id, u32 sw_if_index, + u32 flags) +{ + snat_main_t *sm = &snat_main; + int i; + if (nat44_ed_get_resolve_record (l_addr, l_port, e_port, proto, vrf_id, + sw_if_index, flags, &i)) + { + vec_del1 (sm->sm_to_resolve, i); + return 0; + } + return 1; +} - if (twice_nat == TWICE_NAT && exact) +static_always_inline int +nat44_ed_validate_sm_input (u32 flags) +{ + // identity nat can be initiated only from inside interface + if (is_sm_identity_nat (flags) && is_sm_out2in_only (flags)) + { + return VNET_API_ERROR_UNSUPPORTED; + } + + if (is_sm_twice_nat (flags) || is_sm_self_twice_nat (flags)) + { + if (is_sm_addr_only (flags) || is_sm_identity_nat (flags)) { - m->flags |= NAT_STATIC_MAPPING_FLAG_EXACT_ADDRESS; - m->pool_addr = pool_addr; + return VNET_API_ERROR_UNSUPPORTED; } + } + return 0; +} + +int +nat44_ed_add_static_mapping (ip4_address_t l_addr, ip4_address_t e_addr, + u16 l_port, u16 e_port, ip_protocol_t proto, + u32 vrf_id, u32 sw_if_index, u32 flags, + ip4_address_t pool_addr, u8 *tag) +{ + snat_static_mapping_resolve_t *rp; + snat_main_t *sm = &snat_main; + int rv; + + if (!sm->enabled) + { + return VNET_API_ERROR_UNSUPPORTED; + } - if (out2in_only) - m->flags |= NAT_STATIC_MAPPING_FLAG_OUT2IN_ONLY; - if (addr_only) - m->flags |= NAT_STATIC_MAPPING_FLAG_ADDR_ONLY; - if (identity_nat) + rv = nat44_ed_validate_sm_input (flags); + if (rv != 0) + { + return rv; + } + + // interface bound mapping + if (is_sm_switch_address (flags)) + { + if (nat44_ed_get_resolve_record (l_addr, l_port, e_port, proto, vrf_id, + sw_if_index, flags, 0)) { - m->flags |= NAT_STATIC_MAPPING_FLAG_IDENTITY_NAT; - pool_get (m->locals, local); - local->vrf_id = vrf_id; - local->fib_index = fib_index; + return VNET_API_ERROR_VALUE_EXIST; } - else + + vec_add2 (sm->sm_to_resolve, rp, 1); + rp->l_addr.as_u32 = l_addr.as_u32; + rp->l_port = l_port; + rp->e_port = e_port; + rp->sw_if_index = sw_if_index; + rp->vrf_id = vrf_id; + rp->proto = proto; + rp->flags = flags; + rp->pool_addr = pool_addr; + rp->tag = vec_dup (tag); + rp->is_resolved = 0; + + ip4_address_t *first_int_addr = + ip4_interface_first_address (sm->ip4_main, sw_if_index, 0); + if (!first_int_addr) { - m->vrf_id = vrf_id; - m->fib_index = fib_index; + return 0; } - if (!addr_only) + + e_addr.as_u32 = first_int_addr->as_u32; + rp->is_resolved = 1; + } + + rv = nat44_ed_add_static_mapping_internal (l_addr, e_addr, l_port, e_port, + proto, vrf_id, sw_if_index, flags, + pool_addr, tag); + if ((0 != rv) && is_sm_switch_address (flags)) + { + nat44_ed_del_resolve_record (l_addr, l_port, e_port, proto, vrf_id, + sw_if_index, flags); + } + + return rv; +} + +int +nat44_ed_del_static_mapping (ip4_address_t l_addr, ip4_address_t e_addr, + u16 l_port, u16 e_port, ip_protocol_t proto, + u32 vrf_id, u32 sw_if_index, u32 flags) +{ + snat_main_t *sm = &snat_main; + int rv; + + if (!sm->enabled) + { + return VNET_API_ERROR_UNSUPPORTED; + } + + rv = nat44_ed_validate_sm_input (flags); + if (rv != 0) + { + return rv; + } + + // interface bound mapping + if (is_sm_switch_address (flags)) + { + if (nat44_ed_del_resolve_record (l_addr, l_port, e_port, proto, vrf_id, + sw_if_index, flags)) { - m->local_port = l_port; - m->external_port = e_port; - m->proto = proto; + return VNET_API_ERROR_NO_SUCH_ENTRY; } - if (sm->num_workers > 1) + ip4_address_t *first_int_addr = + ip4_interface_first_address (sm->ip4_main, sw_if_index, 0); + if (!first_int_addr) { - ip4_header_t ip = { - .src_address = m->local_addr, - }; - vec_add1 (m->workers, - sm->worker_in2out_cb (0, &ip, m->fib_index, 0)); - tsm = vec_elt_at_index (sm->per_thread_data, m->workers[0]); + // dhcp resolution required + return 0; } - else - tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers); - if (!out2in_only) + e_addr.as_u32 = first_int_addr->as_u32; + } + + return nat44_ed_del_static_mapping_internal (l_addr, e_addr, l_port, e_port, + proto, vrf_id, flags); +} + +static int +nat44_ed_add_static_mapping_internal (ip4_address_t l_addr, + ip4_address_t e_addr, u16 l_port, + u16 e_port, ip_protocol_t proto, + u32 vrf_id, u32 sw_if_index, u32 flags, + ip4_address_t pool_addr, u8 *tag) +{ + snat_main_t *sm = &snat_main; + nat44_lb_addr_port_t *local; + snat_static_mapping_t *m; + u32 fib_index = ~0; + + if (is_sm_addr_only (flags)) + { + e_port = l_port = proto = 0; + } + + if (is_sm_identity_nat (flags)) + { + l_port = e_port; + l_addr.as_u32 = e_addr.as_u32; + } + + m = nat44_ed_sm_o2i_lookup (sm, e_addr, e_port, 0, proto); + if (m) + { + // case: + // adding local identity nat record for different vrf table + + if (!is_sm_identity_nat (m->flags)) + { + return VNET_API_ERROR_VALUE_EXIST; + } + + pool_foreach (local, m->locals) + { + if (local->vrf_id == vrf_id) + { + return VNET_API_ERROR_VALUE_EXIST; + } + } + + pool_get (m->locals, local); + + local->vrf_id = vrf_id; + local->fib_index = fib_table_find_or_create_and_lock ( + FIB_PROTOCOL_IP4, vrf_id, sm->fib_src_low); + + nat44_ed_sm_i2o_add (sm, m, m->local_addr, m->local_port, + local->fib_index, m->proto); + + return 0; + } + + if (vrf_id != ~0) + { + fib_index = fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id, + sm->fib_src_low); + } + else + { + // fallback to default vrf + vrf_id = sm->inside_vrf_id; + fib_index = sm->inside_fib_index; + fib_table_lock (fib_index, FIB_PROTOCOL_IP4, sm->fib_src_low); + } + + // test if local mapping record doesn't exist + // identity nat supports multiple records in local mapping + if (!(is_sm_out2in_only (flags) || is_sm_identity_nat (flags))) + { + if (nat44_ed_sm_i2o_lookup (sm, l_addr, l_port, fib_index, proto)) { - init_nat_kv (&kv, m->local_addr, m->local_port, fib_index, m->proto, - 0, m - sm->static_mappings); - clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 1); + return VNET_API_ERROR_VALUE_EXIST; } + } - init_nat_kv (&kv, m->external_addr, m->external_port, 0, m->proto, 0, - m - sm->static_mappings); - clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 1); + pool_get (sm->static_mappings, m); + clib_memset (m, 0, sizeof (*m)); + + m->flags = flags; + m->local_addr = l_addr; + m->external_addr = e_addr; + + m->pool_addr = pool_addr; + m->tag = vec_dup (tag); + + if (!is_sm_addr_only (flags)) + { + m->local_port = l_port; + m->external_port = e_port; + m->proto = proto; + } + + if (is_sm_identity_nat (flags)) + { + pool_get (m->locals, local); + + local->vrf_id = vrf_id; + local->fib_index = fib_index; + } + else + { + m->vrf_id = vrf_id; + m->fib_index = fib_index; + } + + if (!is_sm_out2in_only (flags)) + { + nat44_ed_sm_i2o_add (sm, m, m->local_addr, m->local_port, fib_index, + m->proto); + } + + nat44_ed_sm_o2i_add (sm, m, m->external_addr, m->external_port, 0, m->proto); + + if (sm->num_workers > 1) + { + // store worker index for this record + ip4_header_t ip = { + .src_address = m->local_addr, + }; + u32 worker_index; + worker_index = + nat44_ed_get_in2out_worker_index (0, &ip, m->fib_index, 0); + vec_add1 (m->workers, worker_index); + } + + nat44_ed_add_del_interface_fib_reg_entries (e_addr, 1); + + return 0; +} + +static int +nat44_ed_del_static_mapping_internal (ip4_address_t l_addr, + ip4_address_t e_addr, u16 l_port, + u16 e_port, ip_protocol_t proto, + u32 vrf_id, u32 flags) +{ + snat_main_per_thread_data_t *tsm; + snat_main_t *sm = &snat_main; + + nat44_lb_addr_port_t *local; + snat_static_mapping_t *m; + u32 fib_index = ~0; + + if (is_sm_addr_only (flags)) + { + e_port = l_port = proto = 0; } - else + + if (is_sm_identity_nat (flags)) { - if (!m) - { - if (sw_if_index != ~0) - return 0; - else - return VNET_API_ERROR_NO_SUCH_ENTRY; - } + l_port = e_port; + l_addr.as_u32 = e_addr.as_u32; + } - if (identity_nat) - { - if (vrf_id == ~0) - vrf_id = sm->inside_vrf_id; + // fib index 0 + m = nat44_ed_sm_o2i_lookup (sm, e_addr, e_port, 0, proto); + if (!m) + { + return VNET_API_ERROR_NO_SUCH_ENTRY; + } - /* *INDENT-OFF* */ - pool_foreach (local, m->locals) - { - if (local->vrf_id == vrf_id) - find = local - m->locals; - } - /* *INDENT-ON* */ - if (find == ~0) - return VNET_API_ERROR_NO_SUCH_ENTRY; + if (is_sm_identity_nat (flags)) + { + u8 found = 0; - local = pool_elt_at_index (m->locals, find); - fib_index = local->fib_index; - pool_put (m->locals, local); + if (vrf_id == ~0) + { + vrf_id = sm->inside_vrf_id; } - else - fib_index = m->fib_index; - /* Free external address port */ - if (!(addr_only || sm->static_mapping_only || out2in_only)) + pool_foreach (local, m->locals) { - for (i = 0; i < vec_len (sm->addresses); i++) + if (local->vrf_id == vrf_id) { - if (sm->addresses[i].addr.as_u32 == e_addr.as_u32) - { - a = sm->addresses + i; - switch (proto) - { -#define _(N, j, n, s) \ - case NAT_PROTOCOL_##N: \ - --a->busy_##n##_port_refcounts[e_port]; \ - if (e_port > 1024) \ - { \ - a->busy_##n##_ports--; \ - a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]--; \ - } \ - break; - foreach_nat_protocol -#undef _ - default : nat_elog_info (sm, "unknown protocol"); - return VNET_API_ERROR_INVALID_VALUE_2; - } - break; - } + local = pool_elt_at_index (m->locals, local - m->locals); + fib_index = local->fib_index; + pool_put (m->locals, local); + found = 1; } } - if (sm->num_workers > 1) - tsm = vec_elt_at_index (sm->per_thread_data, m->workers[0]); - else - tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers); - - init_nat_k (&kv, m->local_addr, m->local_port, fib_index, m->proto); - if (!out2in_only) - clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 0); - - /* Delete session(s) for static mapping if exist */ - if (!(sm->static_mapping_only) || - (sm->static_mapping_only && sm->static_mapping_connection_tracking)) + if (!found) { - nat_ed_static_mapping_del_sessions ( - sm, tsm, m->local_addr, m->local_port, m->proto, fib_index, - addr_only, e_addr, e_port); + return VNET_API_ERROR_NO_SUCH_ENTRY; } + } + else + { + fib_index = m->fib_index; + } - fib_table_unlock (fib_index, FIB_PROTOCOL_IP4, sm->fib_src_low); - if (pool_elts (m->locals)) - return 0; - - init_nat_k (&kv, m->external_addr, m->external_port, 0, m->proto); - clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 0); + if (!is_sm_out2in_only (flags)) + { + nat44_ed_sm_i2o_del (sm, l_addr, l_port, fib_index, proto); + } - vec_free (m->tag); - vec_free (m->workers); - /* Delete static mapping from pool */ - pool_put (sm->static_mappings, m); + // delete sessions for static mapping + if (sm->num_workers > 1) + { + tsm = vec_elt_at_index (sm->per_thread_data, m->workers[0]); + } + else + { + tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers); } - if (!addr_only || (l_addr.as_u32 == e_addr.as_u32)) - return 0; + nat_ed_static_mapping_del_sessions (sm, tsm, m->local_addr, m->local_port, + m->proto, fib_index, + is_sm_addr_only (flags), e_addr, e_port); - /* Add/delete external address to FIB */ - /* *INDENT-OFF* */ - pool_foreach (interface, sm->interfaces) - { - if (nat_interface_is_inside (interface)) - continue; + fib_table_unlock (fib_index, FIB_PROTOCOL_IP4, sm->fib_src_low); - snat_add_del_addr_to_fib (&e_addr, 32, interface->sw_if_index, is_add); - break; - } - pool_foreach (interface, sm->output_feature_interfaces) - { - if (nat_interface_is_inside (interface)) - continue; + if (!pool_elts (m->locals)) + { + // this is last record remove all required stuff + // fib_index 0 + nat44_ed_sm_o2i_del (sm, e_addr, e_port, 0, proto); - snat_add_del_addr_to_fib (&e_addr, 32, interface->sw_if_index, is_add); - break; - } - /* *INDENT-ON* */ + vec_free (m->tag); + vec_free (m->workers); + pool_put (sm->static_mappings, m); + + nat44_ed_add_del_interface_fib_reg_entries (e_addr, 0); + } return 0; } int -nat44_add_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port, - nat_protocol_t proto, - nat44_lb_addr_port_t * locals, u8 is_add, - twice_nat_type_t twice_nat, u8 out2in_only, - u8 * tag, u32 affinity) +nat44_ed_add_lb_static_mapping (ip4_address_t e_addr, u16 e_port, + ip_protocol_t proto, + nat44_lb_addr_port_t *locals, u32 flags, + u8 *tag, u32 affinity) { snat_main_t *sm = &snat_main; snat_static_mapping_t *m; - clib_bihash_kv_8_8_t kv, value; snat_address_t *a = 0; - int i; + nat44_lb_addr_port_t *local; - snat_main_per_thread_data_t *tsm; - snat_session_t *s; uword *bitmap = 0; + int rc = 0; - init_nat_k (&kv, e_addr, e_port, 0, proto); - if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) - m = 0; - else - m = pool_elt_at_index (sm->static_mappings, value.value); + int i; - if (is_add) + if (!sm->enabled) { - if (m) - return VNET_API_ERROR_VALUE_EXIST; + return VNET_API_ERROR_UNSUPPORTED; + } - if (vec_len (locals) < 2) - return VNET_API_ERROR_INVALID_VALUE; + m = nat44_ed_sm_o2i_lookup (sm, e_addr, e_port, 0, proto); + if (m) + { + return VNET_API_ERROR_VALUE_EXIST; + } + + if (vec_len (locals) < 2) + { + return VNET_API_ERROR_INVALID_VALUE; + } + + if (!is_sm_out2in_only (flags)) + { /* Find external address in allocated addresses and reserve port for - address and port pair mapping when dynamic translations enabled */ - if (!(sm->static_mapping_only || out2in_only)) + address and port pair mapping when dynamic translations enabled */ + for (i = 0; i < vec_len (sm->addresses); i++) { - for (i = 0; i < vec_len (sm->addresses); i++) + if (sm->addresses[i].addr.as_u32 == e_addr.as_u32) { - if (sm->addresses[i].addr.as_u32 == e_addr.as_u32) + /* External port must be unused */ + a = sm->addresses + i; + if (nat44_ed_sm_o2i_lookup (sm, a->addr, e_port, 0, proto)) { - a = sm->addresses + i; - /* External port must be unused */ - switch (proto) - { -#define _(N, j, n, s) \ - case NAT_PROTOCOL_##N: \ - if (a->busy_##n##_port_refcounts[e_port]) \ - return VNET_API_ERROR_INVALID_VALUE; \ - ++a->busy_##n##_port_refcounts[e_port]; \ - if (e_port > 1024) \ - { \ - a->busy_##n##_ports++; \ - a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]++; \ - } \ - break; - foreach_nat_protocol -#undef _ - default : nat_elog_info (sm, "unknown protocol"); - return VNET_API_ERROR_INVALID_VALUE_2; - } - break; + return VNET_API_ERROR_VALUE_EXIST; } + break; } - /* External address must be allocated */ - if (!a) - return VNET_API_ERROR_NO_SUCH_ENTRY; } - - pool_get (sm->static_mappings, m); - clib_memset (m, 0, sizeof (*m)); - m->tag = vec_dup (tag); - m->external_addr = e_addr; - m->external_port = e_port; - m->proto = proto; - m->twice_nat = twice_nat; - m->flags |= NAT_STATIC_MAPPING_FLAG_LB; - if (out2in_only) - m->flags |= NAT_STATIC_MAPPING_FLAG_OUT2IN_ONLY; - m->affinity = affinity; - - if (affinity) - m->affinity_per_service_list_head_index = - nat_affinity_get_per_service_list_head_index (); - else - m->affinity_per_service_list_head_index = ~0; - - init_nat_kv (&kv, m->external_addr, m->external_port, 0, m->proto, 0, - m - sm->static_mappings); - if (clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 1)) + // external address must be allocated + if (!a) { - nat_elog_err (sm, "static_mapping_by_external key add failed"); - return VNET_API_ERROR_UNSPECIFIED; + return VNET_API_ERROR_NO_SUCH_ENTRY; } + } + + pool_get (sm->static_mappings, m); + clib_memset (m, 0, sizeof (*m)); + m->tag = vec_dup (tag); + m->external_addr = e_addr; + m->external_port = e_port; + m->affinity = affinity; + m->proto = proto; + + m->flags = flags; + m->flags |= NAT_SM_FLAG_LB; + + if (affinity) + m->affinity_per_service_list_head_index = + nat_affinity_get_per_service_list_head_index (); + else + m->affinity_per_service_list_head_index = ~0; + + if (nat44_ed_sm_o2i_add (sm, m, m->external_addr, m->external_port, 0, + m->proto)) + { + nat_log_err ("sm o2i key add failed"); + return VNET_API_ERROR_UNSPECIFIED; + } - for (i = 0; i < vec_len (locals); i++) + for (i = 0; i < vec_len (locals); i++) + { + locals[i].fib_index = fib_table_find_or_create_and_lock ( + FIB_PROTOCOL_IP4, locals[i].vrf_id, sm->fib_src_low); + if (!is_sm_out2in_only (flags)) { - locals[i].fib_index = - fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, - locals[i].vrf_id, - sm->fib_src_low); - if (!out2in_only) - { - init_nat_kv (&kv, locals[i].addr, locals[i].port, - locals[i].fib_index, m->proto, 0, - m - sm->static_mappings); - clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 1); - } - locals[i].prefix = (i == 0) ? locals[i].probability : - (locals[i - 1].prefix + locals[i].probability); - pool_get (m->locals, local); - *local = locals[i]; - if (sm->num_workers > 1) + if (nat44_ed_sm_o2i_add (sm, m, e_addr, e_port, 0, proto)) { - ip4_header_t ip = { - .src_address = locals[i].addr, - }; - bitmap = clib_bitmap_set ( - bitmap, sm->worker_in2out_cb (0, &ip, m->fib_index, 0), 1); + nat_log_err ("sm o2i key add failed"); + rc = VNET_API_ERROR_UNSPECIFIED; + // here we continue with add operation so that it can be safely + // reversed in delete path - otherwise we'd have to track what + // we've done and deal with partial cleanups and since bihash + // adds are (extremely improbable) the only points of failure, + // it's easier to just do it this way } } - - /* Assign workers */ + locals[i].prefix = (i == 0) ? + locals[i].probability : + (locals[i - 1].prefix + locals[i].probability); + pool_get (m->locals, local); + *local = locals[i]; if (sm->num_workers > 1) { - /* *INDENT-OFF* */ - clib_bitmap_foreach (i, bitmap) - { - vec_add1(m->workers, i); - } - /* *INDENT-ON* */ + ip4_header_t ip = { + .src_address = locals[i].addr, + }; + bitmap = clib_bitmap_set ( + bitmap, nat44_ed_get_in2out_worker_index (0, &ip, m->fib_index, 0), + 1); } } - else + + /* Assign workers */ + if (sm->num_workers > 1) { - if (!m) - return VNET_API_ERROR_NO_SUCH_ENTRY; + clib_bitmap_foreach (i, bitmap) + { + vec_add1 (m->workers, i); + } + } + + return rc; +} + +int +nat44_ed_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port, + ip_protocol_t proto, u32 flags) +{ + snat_main_t *sm = &snat_main; + snat_static_mapping_t *m; + + nat44_lb_addr_port_t *local; + snat_main_per_thread_data_t *tsm; + snat_session_t *s; + + if (!sm->enabled) + { + return VNET_API_ERROR_UNSUPPORTED; + } + + m = nat44_ed_sm_o2i_lookup (sm, e_addr, e_port, 0, proto); + if (!m) + return VNET_API_ERROR_NO_SUCH_ENTRY; + + if (!is_sm_lb (m->flags)) + return VNET_API_ERROR_INVALID_VALUE; - if (!is_lb_static_mapping (m)) - return VNET_API_ERROR_INVALID_VALUE; + if (nat44_ed_sm_o2i_del (sm, m->external_addr, m->external_port, 0, + m->proto)) + { + nat_log_err ("sm o2i key del failed"); + return VNET_API_ERROR_UNSPECIFIED; + } - /* Free external address port */ - if (!(sm->static_mapping_only || out2in_only)) + pool_foreach (local, m->locals) + { + fib_table_unlock (local->fib_index, FIB_PROTOCOL_IP4, sm->fib_src_low); + if (!is_sm_out2in_only (flags)) { - for (i = 0; i < vec_len (sm->addresses); i++) + if (nat44_ed_sm_i2o_del (sm, local->addr, local->port, + local->fib_index, m->proto)) { - if (sm->addresses[i].addr.as_u32 == e_addr.as_u32) - { - a = sm->addresses + i; - switch (proto) - { -#define _(N, j, n, s) \ - case NAT_PROTOCOL_##N: \ - --a->busy_##n##_port_refcounts[e_port]; \ - if (e_port > 1024) \ - { \ - a->busy_##n##_ports--; \ - a->busy_##n##_ports_per_thread[get_thread_idx_by_port(e_port)]--; \ - } \ - break; - foreach_nat_protocol -#undef _ - default : nat_elog_info (sm, "unknown protocol"); - return VNET_API_ERROR_INVALID_VALUE_2; - } - break; - } + nat_log_err ("sm i2o key del failed"); + return VNET_API_ERROR_UNSPECIFIED; } } - init_nat_k (&kv, m->external_addr, m->external_port, 0, m->proto); - if (clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 0)) + if (sm->num_workers > 1) { - nat_elog_err (sm, "static_mapping_by_external key del failed"); - return VNET_API_ERROR_UNSPECIFIED; + ip4_header_t ip = { + .src_address = local->addr, + }; + tsm = vec_elt_at_index ( + sm->per_thread_data, + nat44_ed_get_in2out_worker_index (0, &ip, m->fib_index, 0)); } + else + tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers); - /* *INDENT-OFF* */ - pool_foreach (local, m->locals) - { - fib_table_unlock (local->fib_index, FIB_PROTOCOL_IP4, - sm->fib_src_low); - if (!out2in_only) - { - init_nat_k (&kv, local->addr, local->port, local->fib_index, - m->proto); - if (clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, - 0)) - { - nat_elog_err (sm, "static_mapping_by_local key del failed"); - return VNET_API_ERROR_UNSPECIFIED; - } - } - - if (sm->num_workers > 1) - { - ip4_header_t ip = { - .src_address = local->addr, - }; - tsm = vec_elt_at_index ( - sm->per_thread_data, - sm->worker_in2out_cb (0, &ip, m->fib_index, 0)); - } - else - tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers); - - /* Delete sessions */ - pool_foreach (s, tsm->sessions) - { - if (!(is_lb_session (s))) - continue; + /* Delete sessions */ + pool_foreach (s, tsm->sessions) + { + if (!(nat44_ed_is_lb_session (s))) + continue; - if ((s->in2out.addr.as_u32 != local->addr.as_u32) || - s->in2out.port != local->port) - continue; + if ((s->in2out.addr.as_u32 != local->addr.as_u32) || + s->in2out.port != local->port) + continue; - nat_free_session_data (sm, s, tsm - sm->per_thread_data, 0); - nat_ed_session_delete (sm, s, tsm - sm->per_thread_data, 1); - } - } - /* *INDENT-ON* */ - if (m->affinity) - nat_affinity_flush_service (m->affinity_per_service_list_head_index); - pool_free (m->locals); - vec_free (m->tag); - vec_free (m->workers); + nat44_ed_free_session_data (sm, s, tsm - sm->per_thread_data, 0); + nat_ed_session_delete (sm, s, tsm - sm->per_thread_data, 1); + } + } - pool_put (sm->static_mappings, m); + if (m->affinity) + { + nat_affinity_flush_service (m->affinity_per_service_list_head_index); } + pool_free (m->locals); + vec_free (m->tag); + vec_free (m->workers); + pool_put (sm->static_mappings, m); + return 0; } int -nat44_lb_static_mapping_add_del_local (ip4_address_t e_addr, u16 e_port, - ip4_address_t l_addr, u16 l_port, - nat_protocol_t proto, u32 vrf_id, - u8 probability, u8 is_add) +nat44_ed_add_del_lb_static_mapping_local (ip4_address_t e_addr, u16 e_port, + ip4_address_t l_addr, u16 l_port, + ip_protocol_t proto, u32 vrf_id, + u8 probability, u8 is_add) { snat_main_t *sm = &snat_main; snat_static_mapping_t *m = 0; - clib_bihash_kv_8_8_t kv, value; nat44_lb_addr_port_t *local, *prev_local, *match_local = 0; snat_main_per_thread_data_t *tsm; snat_session_t *s; @@ -1120,17 +1415,23 @@ nat44_lb_static_mapping_add_del_local (ip4_address_t e_addr, u16 e_port, uword *bitmap = 0; int i; - init_nat_k (&kv, e_addr, e_port, 0, proto); - if (!clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) - m = pool_elt_at_index (sm->static_mappings, value.value); + if (!sm->enabled) + { + return VNET_API_ERROR_UNSUPPORTED; + } + + m = nat44_ed_sm_o2i_lookup (sm, e_addr, e_port, 0, proto); if (!m) - return VNET_API_ERROR_NO_SUCH_ENTRY; + { + return VNET_API_ERROR_NO_SUCH_ENTRY; + } - if (!is_lb_static_mapping (m)) - return VNET_API_ERROR_INVALID_VALUE; + if (!is_sm_lb (m->flags)) + { + return VNET_API_ERROR_INVALID_VALUE; + } - /* *INDENT-OFF* */ pool_foreach (local, m->locals) { if ((local->addr.as_u32 == l_addr.as_u32) && (local->port == l_port) && @@ -1140,12 +1441,13 @@ nat44_lb_static_mapping_add_del_local (ip4_address_t e_addr, u16 e_port, break; } } - /* *INDENT-ON* */ if (is_add) { if (match_local) - return VNET_API_ERROR_VALUE_EXIST; + { + return VNET_API_ERROR_VALUE_EXIST; + } pool_get (m->locals, local); clib_memset (local, 0, sizeof (*local)); @@ -1157,12 +1459,15 @@ nat44_lb_static_mapping_add_del_local (ip4_address_t e_addr, u16 e_port, fib_table_find_or_create_and_lock (FIB_PROTOCOL_IP4, vrf_id, sm->fib_src_low); - if (!is_out2in_only_static_mapping (m)) + if (!is_sm_out2in_only (m->flags)) { - init_nat_kv (&kv, l_addr, l_port, local->fib_index, proto, 0, - m - sm->static_mappings); - if (clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 1)) - nat_elog_err (sm, "static_mapping_by_local key add failed"); + if (nat44_ed_sm_i2o_add (sm, m, l_addr, l_port, local->fib_index, + proto)) + { + nat_log_err ("sm i2o key add failed"); + pool_put (m->locals, local); + return VNET_API_ERROR_UNSPECIFIED; + } } } else @@ -1176,11 +1481,11 @@ nat44_lb_static_mapping_add_del_local (ip4_address_t e_addr, u16 e_port, fib_table_unlock (match_local->fib_index, FIB_PROTOCOL_IP4, sm->fib_src_low); - if (!is_out2in_only_static_mapping (m)) + if (!is_sm_out2in_only (m->flags)) { - init_nat_k (&kv, l_addr, l_port, match_local->fib_index, proto); - if (clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 0)) - nat_elog_err (sm, "static_mapping_by_local key del failed"); + if (nat44_ed_sm_i2o_del (sm, l_addr, l_port, match_local->fib_index, + proto)) + nat_log_err ("sm i2o key del failed"); } if (sm->num_workers > 1) @@ -1188,34 +1493,31 @@ nat44_lb_static_mapping_add_del_local (ip4_address_t e_addr, u16 e_port, ip4_header_t ip = { .src_address = local->addr, }; - tsm = - vec_elt_at_index (sm->per_thread_data, - sm->worker_in2out_cb (0, &ip, m->fib_index, 0)); + tsm = vec_elt_at_index ( + sm->per_thread_data, + nat44_ed_get_in2out_worker_index (0, &ip, m->fib_index, 0)); } else tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers); /* Delete sessions */ - /* *INDENT-OFF* */ pool_foreach (s, tsm->sessions) { - if (!(is_lb_session (s))) - continue; + if (!(nat44_ed_is_lb_session (s))) + continue; - if ((s->in2out.addr.as_u32 != match_local->addr.as_u32) || - s->in2out.port != match_local->port) - continue; + if ((s->in2out.addr.as_u32 != match_local->addr.as_u32) || + s->in2out.port != match_local->port) + continue; - nat_free_session_data (sm, s, tsm - sm->per_thread_data, 0); - nat_ed_session_delete (sm, s, tsm - sm->per_thread_data, 1); + nat44_ed_free_session_data (sm, s, tsm - sm->per_thread_data, 0); + nat_ed_session_delete (sm, s, tsm - sm->per_thread_data, 1); } - /* *INDENT-ON* */ pool_put (m->locals, match_local); } vec_free (m->workers); - /* *INDENT-OFF* */ pool_foreach (local, m->locals) { vec_add1 (locals, local - m->locals); @@ -1224,10 +1526,10 @@ nat44_lb_static_mapping_add_del_local (ip4_address_t e_addr, u16 e_port, ip4_header_t ip; ip.src_address.as_u32 = local->addr.as_u32, bitmap = clib_bitmap_set ( - bitmap, sm->worker_in2out_cb (0, &ip, local->fib_index, 0), 1); + bitmap, + nat44_ed_get_in2out_worker_index (0, &ip, local->fib_index, 0), 1); } } - /* *INDENT-ON* */ ASSERT (vec_len (locals) > 1); @@ -1243,128 +1545,8 @@ nat44_lb_static_mapping_add_del_local (ip4_address_t e_addr, u16 e_port, /* Assign workers */ if (sm->num_workers > 1) { - /* *INDENT-OFF* */ clib_bitmap_foreach (i, bitmap) { vec_add1(m->workers, i); } - /* *INDENT-ON* */ - } - - return 0; -} - -int -snat_del_address (snat_main_t * sm, ip4_address_t addr, u8 delete_sm, - u8 twice_nat) -{ - snat_address_t *a = 0; - snat_session_t *ses; - u32 *ses_to_be_removed = 0, *ses_index; - snat_main_per_thread_data_t *tsm; - snat_static_mapping_t *m; - snat_interface_t *interface; - int i; - snat_address_t *addresses = - twice_nat ? sm->twice_nat_addresses : sm->addresses; - - /* Find SNAT address */ - for (i = 0; i < vec_len (addresses); i++) - { - if (addresses[i].addr.as_u32 == addr.as_u32) - { - a = addresses + i; - break; - } - } - if (!a) - { - nat_log_err ("no such address"); - return VNET_API_ERROR_NO_SUCH_ENTRY; - } - - if (delete_sm) - { - ip4_address_t pool_addr = { 0 }; - /* *INDENT-OFF* */ - pool_foreach (m, sm->static_mappings) - { - if (m->external_addr.as_u32 == addr.as_u32) - (void) snat_add_static_mapping (m->local_addr, m->external_addr, - m->local_port, m->external_port, - m->vrf_id, - is_addr_only_static_mapping(m), ~0, - m->proto, 0 /* is_add */, - m->twice_nat, - is_out2in_only_static_mapping(m), - m->tag, - is_identity_static_mapping(m), - pool_addr, 0); - } - /* *INDENT-ON* */ - } - else - { - /* Check if address is used in some static mapping */ - if (is_snat_address_used_in_static_mapping (sm, addr)) - { - nat_log_err ("address used in static mapping"); - return VNET_API_ERROR_UNSPECIFIED; - } - } - - if (a->fib_index != ~0) - fib_table_unlock (a->fib_index, FIB_PROTOCOL_IP4, sm->fib_src_low); - - /* Delete sessions using address */ - if (a->busy_tcp_ports || a->busy_udp_ports || a->busy_icmp_ports) - { - vec_foreach (tsm, sm->per_thread_data) - { - pool_foreach (ses, tsm->sessions) { - if (ses->out2in.addr.as_u32 == addr.as_u32) - { - nat_free_session_data (sm, ses, tsm - sm->per_thread_data, 0); - vec_add1 (ses_to_be_removed, ses - tsm->sessions); - } - } - - vec_foreach (ses_index, ses_to_be_removed) - { - ses = pool_elt_at_index (tsm->sessions, ses_index[0]); - nat_ed_session_delete (sm, ses, tsm - sm->per_thread_data, 1); - } - - vec_free (ses_to_be_removed); - } - } - -#define _(N, i, n, s) \ - vec_free (a->busy_##n##_ports_per_thread); - foreach_nat_protocol -#undef _ - - if (twice_nat) - { - vec_del1 (sm->twice_nat_addresses, i); - return 0; - } - else vec_del1 (sm->addresses, i); - - /* Delete external address from FIB */ - pool_foreach (interface, sm->interfaces) - { - if (nat_interface_is_inside (interface)) - continue; - - snat_add_del_addr_to_fib (&addr, 32, interface->sw_if_index, 0); - break; } - pool_foreach (interface, sm->output_feature_interfaces) - { - if (nat_interface_is_inside (interface)) - continue; - - snat_add_del_addr_to_fib (&addr, 32, interface->sw_if_index, 0); - break; - } return 0; } @@ -1376,7 +1558,6 @@ expire_per_vrf_sessions (u32 fib_index) snat_main_per_thread_data_t *tsm; snat_main_t *sm = &snat_main; - /* *INDENT-OFF* */ vec_foreach (tsm, sm->per_thread_data) { vec_foreach (per_vrf_sessions, tsm->per_vrf_sessions_vec) @@ -1388,7 +1569,6 @@ expire_per_vrf_sessions (u32 fib_index) } } } - /* *INDENT-ON* */ } void @@ -1422,23 +1602,50 @@ update_per_vrf_sessions_vec (u32 fib_index, int is_del) } if (!is_del) { - vec_add2 (sm->fibs, fib, 1); - fib->ref_count = 1; - fib->fib_index = fib_index; + vec_add2 (sm->fibs, fib, 1); + fib->ref_count = 1; + fib->fib_index = fib_index; + } +} + +static_always_inline nat_outside_fib_t * +nat44_ed_get_outside_fib (nat_outside_fib_t *outside_fibs, u32 fib_index) +{ + nat_outside_fib_t *f; + vec_foreach (f, outside_fibs) + { + if (f->fib_index == fib_index) + { + return f; + } + } + return 0; +} + +static_always_inline snat_interface_t * +nat44_ed_get_interface (snat_interface_t *interfaces, u32 sw_if_index) +{ + snat_interface_t *i; + pool_foreach (i, interfaces) + { + if (i->sw_if_index == sw_if_index) + { + return i; + } } + return 0; } int -snat_interface_add_del (u32 sw_if_index, u8 is_inside, int is_del) +nat44_ed_add_interface (u32 sw_if_index, u8 is_inside) { + const char *del_feature_name, *feature_name; snat_main_t *sm = &snat_main; - snat_interface_t *i; - const char *feature_name, *del_feature_name; - snat_address_t *ap; - snat_static_mapping_t *m; + nat_outside_fib_t *outside_fib; - u32 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, - sw_if_index); + snat_interface_t *i; + u32 fib_index; + int rv; if (!sm->enabled) { @@ -1446,205 +1653,213 @@ snat_interface_add_del (u32 sw_if_index, u8 is_inside, int is_del) return VNET_API_ERROR_UNSUPPORTED; } - /* *INDENT-OFF* */ - pool_foreach (i, sm->output_feature_interfaces) - { - if (i->sw_if_index == sw_if_index) - { - nat_log_err ("error interface already configured"); - return VNET_API_ERROR_VALUE_EXIST; - } - } - /* *INDENT-ON* */ + if (nat44_ed_get_interface (sm->output_feature_interfaces, sw_if_index)) + { + nat_log_err ("error interface already configured"); + return VNET_API_ERROR_VALUE_EXIST; + } - if (sm->static_mapping_only && !(sm->static_mapping_connection_tracking)) - feature_name = is_inside ? "nat44-in2out-fast" : "nat44-out2in-fast"; - else + i = nat44_ed_get_interface (sm->interfaces, sw_if_index); + if (i) { + if ((nat44_ed_is_interface_inside (i) && is_inside) || + (nat44_ed_is_interface_outside (i) && !is_inside)) + { + return 0; + } if (sm->num_workers > 1) - feature_name = - is_inside ? "nat44-in2out-worker-handoff" : - "nat44-out2in-worker-handoff"; + { + del_feature_name = !is_inside ? "nat44-in2out-worker-handoff" : + "nat44-out2in-worker-handoff"; + feature_name = "nat44-handoff-classify"; + } else - feature_name = is_inside ? "nat-pre-in2out" : "nat-pre-out2in"; + { + del_feature_name = !is_inside ? "nat-pre-in2out" : "nat-pre-out2in"; + + feature_name = "nat44-ed-classify"; + } + + rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 1); + if (rv) + return rv; + vnet_feature_enable_disable ("ip4-unicast", del_feature_name, + sw_if_index, 0, 0, 0); + vnet_feature_enable_disable ("ip4-unicast", feature_name, sw_if_index, 1, + 0, 0); } + else + { + if (sm->num_workers > 1) + { + feature_name = is_inside ? "nat44-in2out-worker-handoff" : + "nat44-out2in-worker-handoff"; + } + else + { + feature_name = is_inside ? "nat-pre-in2out" : "nat-pre-out2in"; + } - ASSERT (sm->frame_queue_nelts > 0); + nat_validate_interface_counters (sm, sw_if_index); + rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 1); + if (rv) + return rv; + vnet_feature_enable_disable ("ip4-unicast", feature_name, sw_if_index, 1, + 0, 0); - if (sm->fq_in2out_index == ~0 && sm->num_workers > 1) - sm->fq_in2out_index = vlib_frame_queue_main_init (sm->in2out_node_index, - sm->frame_queue_nelts); + pool_get (sm->interfaces, i); + i->sw_if_index = sw_if_index; + i->flags = 0; + } - if (sm->fq_out2in_index == ~0 && sm->num_workers > 1) - sm->fq_out2in_index = vlib_frame_queue_main_init (sm->out2in_node_index, - sm->frame_queue_nelts); + fib_index = + fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index); - update_per_vrf_sessions_vec (fib_index, is_del); + update_per_vrf_sessions_vec (fib_index, 0 /*is_del*/); if (!is_inside) { - /* *INDENT-OFF* */ - vec_foreach (outside_fib, sm->outside_fibs) - { - if (outside_fib->fib_index == fib_index) - { - if (is_del) - { - outside_fib->refcount--; - if (!outside_fib->refcount) - vec_del1 (sm->outside_fibs, outside_fib - sm->outside_fibs); - } - else - outside_fib->refcount++; - goto feature_set; - } - } - /* *INDENT-ON* */ - if (!is_del) + i->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE; + + outside_fib = nat44_ed_get_outside_fib (sm->outside_fibs, fib_index); + if (outside_fib) + { + outside_fib->refcount++; + } + else { vec_add2 (sm->outside_fibs, outside_fib, 1); - outside_fib->refcount = 1; outside_fib->fib_index = fib_index; + outside_fib->refcount = 1; } - } -feature_set: - /* *INDENT-OFF* */ - pool_foreach (i, sm->interfaces) - { - if (i->sw_if_index == sw_if_index) - { - if (is_del) - { - if (nat_interface_is_inside(i) && nat_interface_is_outside(i)) - { - if (is_inside) - i->flags &= ~NAT_INTERFACE_FLAG_IS_INSIDE; - else - i->flags &= ~NAT_INTERFACE_FLAG_IS_OUTSIDE; - - if (sm->num_workers > 1) - { - del_feature_name = "nat44-handoff-classify"; - feature_name = !is_inside ? "nat44-in2out-worker-handoff" : - "nat44-out2in-worker-handoff"; - } - else - { - del_feature_name = "nat44-ed-classify"; - feature_name = - !is_inside ? "nat-pre-in2out" : "nat-pre-out2in"; - } + nat44_ed_add_del_nat_addr_fib_reg_entries (sw_if_index, 1); + nat44_ed_add_del_sm_fib_reg_entries (sw_if_index, 1); - int rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 0); - if (rv) - return rv; - vnet_feature_enable_disable ("ip4-unicast", del_feature_name, - sw_if_index, 0, 0, 0); - vnet_feature_enable_disable ("ip4-unicast", feature_name, - sw_if_index, 1, 0, 0); - } - else - { - int rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 0); - if (rv) - return rv; - vnet_feature_enable_disable ("ip4-unicast", feature_name, - sw_if_index, 0, 0, 0); - pool_put (sm->interfaces, i); - } - } - else - { - if ((nat_interface_is_inside (i) && is_inside) || - (nat_interface_is_outside (i) && !is_inside)) - return 0; + nat44_ed_bind_if_addr_to_nat_addr (sw_if_index); + } + else + { + i->flags |= NAT_INTERFACE_FLAG_IS_INSIDE; + } - if (sm->num_workers > 1) - { - del_feature_name = !is_inside ? "nat44-in2out-worker-handoff" : - "nat44-out2in-worker-handoff"; - feature_name = "nat44-handoff-classify"; - } - else - { - del_feature_name = - !is_inside ? "nat-pre-in2out" : "nat-pre-out2in"; + return 0; +} - feature_name = "nat44-ed-classify"; - } +int +nat44_ed_del_interface (u32 sw_if_index, u8 is_inside) +{ + const char *del_feature_name, *feature_name; + snat_main_t *sm = &snat_main; - int rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 1); - if (rv) - return rv; - vnet_feature_enable_disable ("ip4-unicast", del_feature_name, - sw_if_index, 0, 0, 0); - vnet_feature_enable_disable ("ip4-unicast", feature_name, - sw_if_index, 1, 0, 0); - goto set_flags; - } + nat_outside_fib_t *outside_fib; + snat_interface_t *i; + u32 fib_index; + int rv; - goto fib; - } - } - /* *INDENT-ON* */ + if (!sm->enabled) + { + nat_log_err ("nat44 is disabled"); + return VNET_API_ERROR_UNSUPPORTED; + } - if (is_del) + i = nat44_ed_get_interface (sm->interfaces, sw_if_index); + if (i == 0) { nat_log_err ("error interface couldn't be found"); return VNET_API_ERROR_NO_SUCH_ENTRY; } - pool_get (sm->interfaces, i); - i->sw_if_index = sw_if_index; - i->flags = 0; - nat_validate_interface_counters (sm, sw_if_index); - - vnet_feature_enable_disable ("ip4-unicast", feature_name, sw_if_index, 1, 0, - 0); + if (nat44_ed_is_interface_inside (i) && nat44_ed_is_interface_outside (i)) + { + if (sm->num_workers > 1) + { + del_feature_name = "nat44-handoff-classify"; + feature_name = !is_inside ? "nat44-in2out-worker-handoff" : + "nat44-out2in-worker-handoff"; + } + else + { + del_feature_name = "nat44-ed-classify"; + feature_name = !is_inside ? "nat-pre-in2out" : "nat-pre-out2in"; + } - int rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 1); - if (rv) - return rv; + rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 0); + if (rv) + { + return rv; + } + vnet_feature_enable_disable ("ip4-unicast", del_feature_name, + sw_if_index, 0, 0, 0); + vnet_feature_enable_disable ("ip4-unicast", feature_name, sw_if_index, 1, + 0, 0); -set_flags: - if (is_inside) - { - i->flags |= NAT_INTERFACE_FLAG_IS_INSIDE; - return 0; + if (is_inside) + { + i->flags &= ~NAT_INTERFACE_FLAG_IS_INSIDE; + } + else + { + i->flags &= ~NAT_INTERFACE_FLAG_IS_OUTSIDE; + } } else - i->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE; + { + if (sm->num_workers > 1) + { + feature_name = is_inside ? "nat44-in2out-worker-handoff" : + "nat44-out2in-worker-handoff"; + } + else + { + feature_name = is_inside ? "nat-pre-in2out" : "nat-pre-out2in"; + } - /* Add/delete external addresses to FIB */ -fib: - /* *INDENT-OFF* */ - vec_foreach (ap, sm->addresses) - snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, !is_del); + rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 0); + if (rv) + { + return rv; + } + vnet_feature_enable_disable ("ip4-unicast", feature_name, sw_if_index, 0, + 0, 0); - pool_foreach (m, sm->static_mappings) - { - if (!(is_addr_only_static_mapping(m)) || (m->local_addr.as_u32 == m->external_addr.as_u32)) - continue; + // remove interface + pool_put (sm->interfaces, i); + } - snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del); - } - /* *INDENT-ON* */ + fib_index = + fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index); + + update_per_vrf_sessions_vec (fib_index, 1 /*is_del*/); + + if (!is_inside) + { + outside_fib = nat44_ed_get_outside_fib (sm->outside_fibs, fib_index); + if (outside_fib) + { + outside_fib->refcount--; + if (!outside_fib->refcount) + { + vec_del1 (sm->outside_fibs, outside_fib - sm->outside_fibs); + } + } + + nat44_ed_add_del_nat_addr_fib_reg_entries (sw_if_index, 0); + nat44_ed_add_del_sm_fib_reg_entries (sw_if_index, 0); + } return 0; } int -snat_interface_add_del_output_feature (u32 sw_if_index, - u8 is_inside, int is_del) +nat44_ed_add_output_interface (u32 sw_if_index) { snat_main_t *sm = &snat_main; - snat_interface_t *i; - snat_address_t *ap; - snat_static_mapping_t *m; + nat_outside_fib_t *outside_fib; - u32 fib_index = fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, - sw_if_index); + snat_interface_t *i; + u32 fib_index; + int rv; if (!sm->enabled) { @@ -1652,156 +1867,172 @@ snat_interface_add_del_output_feature (u32 sw_if_index, return VNET_API_ERROR_UNSUPPORTED; } - if (sm->static_mapping_only && !(sm->static_mapping_connection_tracking)) - { - nat_log_err ("error unsupported"); - return VNET_API_ERROR_UNSUPPORTED; - } - - /* *INDENT-OFF* */ - pool_foreach (i, sm->interfaces) - { - if (i->sw_if_index == sw_if_index) - { - nat_log_err ("error interface already configured"); - return VNET_API_ERROR_VALUE_EXIST; - } - } - /* *INDENT-ON* */ - - update_per_vrf_sessions_vec (fib_index, is_del); - - if (!is_inside) + if (nat44_ed_get_interface (sm->interfaces, sw_if_index)) { - /* *INDENT-OFF* */ - vec_foreach (outside_fib, sm->outside_fibs) - { - if (outside_fib->fib_index == fib_index) - { - if (is_del) - { - outside_fib->refcount--; - if (!outside_fib->refcount) - vec_del1 (sm->outside_fibs, outside_fib - sm->outside_fibs); - } - else - outside_fib->refcount++; - goto feature_set; - } - } - /* *INDENT-ON* */ - if (!is_del) - { - vec_add2 (sm->outside_fibs, outside_fib, 1); - outside_fib->refcount = 1; - outside_fib->fib_index = fib_index; - } + nat_log_err ("error interface already configured"); + return VNET_API_ERROR_VALUE_EXIST; } -feature_set: - if (is_inside) + if (nat44_ed_get_interface (sm->output_feature_interfaces, sw_if_index)) { - int rv = - ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, !is_del); - if (rv) - return rv; - rv = - ip4_sv_reass_output_enable_disable_with_refcnt (sw_if_index, - !is_del); - if (rv) - return rv; - goto fq; + nat_log_err ("error interface already configured"); + return VNET_API_ERROR_VALUE_EXIST; } if (sm->num_workers > 1) { - int rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, !is_del); + rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 1); if (rv) - return rv; - rv = - ip4_sv_reass_output_enable_disable_with_refcnt (sw_if_index, !is_del); + { + return rv; + } + + rv = ip4_sv_reass_output_enable_disable_with_refcnt (sw_if_index, 1); if (rv) - return rv; - vnet_feature_enable_disable ("ip4-unicast", - "nat44-out2in-worker-handoff", - sw_if_index, !is_del, 0, 0); + { + return rv; + } + + vnet_feature_enable_disable ( + "ip4-unicast", "nat44-out2in-worker-handoff", sw_if_index, 1, 0, 0); vnet_feature_enable_disable ("ip4-output", "nat44-in2out-output-worker-handoff", - sw_if_index, !is_del, 0, 0); + sw_if_index, 1, 0, 0); } else { - int rv = - ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, !is_del); - if (rv) - return rv; - rv = - ip4_sv_reass_output_enable_disable_with_refcnt (sw_if_index, - !is_del); - if (rv) - return rv; - vnet_feature_enable_disable ("ip4-unicast", "nat-pre-out2in", - sw_if_index, !is_del, 0, 0); - vnet_feature_enable_disable ("ip4-output", "nat-pre-in2out-output", - sw_if_index, !is_del, 0, 0); - } - -fq: - if (sm->fq_in2out_output_index == ~0 && sm->num_workers > 1) - sm->fq_in2out_output_index = - vlib_frame_queue_main_init (sm->in2out_output_node_index, 0); - - if (sm->fq_out2in_index == ~0 && sm->num_workers > 1) - sm->fq_out2in_index = - vlib_frame_queue_main_init (sm->out2in_node_index, 0); - - /* *INDENT-OFF* */ - pool_foreach (i, sm->output_feature_interfaces) - { - if (i->sw_if_index == sw_if_index) - { - if (is_del) - pool_put (sm->output_feature_interfaces, i); - else - return VNET_API_ERROR_VALUE_EXIST; + rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 1); + if (rv) + { + return rv; + } - goto fib; - } - } - /* *INDENT-ON* */ + rv = ip4_sv_reass_output_enable_disable_with_refcnt (sw_if_index, 1); + if (rv) + { + return rv; + } - if (is_del) - { - nat_log_err ("error interface couldn't be found"); - return VNET_API_ERROR_NO_SUCH_ENTRY; + vnet_feature_enable_disable ("ip4-unicast", "nat-pre-out2in", + sw_if_index, 1, 0, 0); + vnet_feature_enable_disable ("ip4-output", "nat-pre-in2out-output", + sw_if_index, 1, 0, 0); } + nat_validate_interface_counters (sm, sw_if_index); + pool_get (sm->output_feature_interfaces, i); i->sw_if_index = sw_if_index; i->flags = 0; - nat_validate_interface_counters (sm, sw_if_index); - if (is_inside) - i->flags |= NAT_INTERFACE_FLAG_IS_INSIDE; + i->flags |= NAT_INTERFACE_FLAG_IS_INSIDE; + i->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE; + + fib_index = + fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index); + update_per_vrf_sessions_vec (fib_index, 0 /*is_del*/); + + outside_fib = nat44_ed_get_outside_fib (sm->outside_fibs, fib_index); + if (outside_fib) + { + outside_fib->refcount++; + } + else + { + vec_add2 (sm->outside_fibs, outside_fib, 1); + outside_fib->fib_index = fib_index; + outside_fib->refcount = 1; + } + + nat44_ed_add_del_nat_addr_fib_reg_entries (sw_if_index, 1); + nat44_ed_add_del_sm_fib_reg_entries (sw_if_index, 1); + + nat44_ed_bind_if_addr_to_nat_addr (sw_if_index); + + return 0; +} + +int +nat44_ed_del_output_interface (u32 sw_if_index) +{ + snat_main_t *sm = &snat_main; + + nat_outside_fib_t *outside_fib; + snat_interface_t *i; + u32 fib_index; + int rv; + + if (!sm->enabled) + { + nat_log_err ("nat44 is disabled"); + return VNET_API_ERROR_UNSUPPORTED; + } + + i = nat44_ed_get_interface (sm->output_feature_interfaces, sw_if_index); + if (!i) + { + nat_log_err ("error interface couldn't be found"); + return VNET_API_ERROR_NO_SUCH_ENTRY; + } + + if (sm->num_workers > 1) + { + rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 0); + if (rv) + { + return rv; + } + + rv = ip4_sv_reass_output_enable_disable_with_refcnt (sw_if_index, 0); + if (rv) + { + return rv; + } + + vnet_feature_enable_disable ( + "ip4-unicast", "nat44-out2in-worker-handoff", sw_if_index, 0, 0, 0); + vnet_feature_enable_disable ("ip4-output", + "nat44-in2out-output-worker-handoff", + sw_if_index, 0, 0, 0); + } else - i->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE; + { + rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 0); + if (rv) + { + return rv; + } + + rv = ip4_sv_reass_output_enable_disable_with_refcnt (sw_if_index, 0); + if (rv) + { + return rv; + } - /* Add/delete external addresses to FIB */ -fib: - if (is_inside) - return 0; + vnet_feature_enable_disable ("ip4-unicast", "nat-pre-out2in", + sw_if_index, 0, 0, 0); + vnet_feature_enable_disable ("ip4-output", "nat-pre-in2out-output", + sw_if_index, 0, 0, 0); + } - /* *INDENT-OFF* */ - vec_foreach (ap, sm->addresses) - snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, !is_del); + // remove interface + pool_put (sm->output_feature_interfaces, i); - pool_foreach (m, sm->static_mappings) - { - if (!((is_addr_only_static_mapping(m))) || (m->local_addr.as_u32 == m->external_addr.as_u32)) - continue; + fib_index = + fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index); + update_per_vrf_sessions_vec (fib_index, 1 /*is_del*/); - snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del); - } - /* *INDENT-ON* */ + outside_fib = nat44_ed_get_outside_fib (sm->outside_fibs, fib_index); + if (outside_fib) + { + outside_fib->refcount--; + if (!outside_fib->refcount) + { + vec_del1 (sm->outside_fibs, outside_fib - sm->outside_fibs); + } + } + + nat44_ed_add_del_nat_addr_fib_reg_entries (sw_if_index, 0); + nat44_ed_add_del_sm_fib_reg_entries (sw_if_index, 0); return 0; } @@ -1819,7 +2050,6 @@ snat_set_workers (uword * bitmap) return VNET_API_ERROR_INVALID_WORKER; vec_free (sm->workers); - /* *INDENT-OFF* */ clib_bitmap_foreach (i, bitmap) { vec_add1(sm->workers, i); @@ -1827,7 +2057,6 @@ snat_set_workers (uword * bitmap) sm->per_thread_data[sm->first_worker_index + i].thread_index = i; j++; } - /* *INDENT-ON* */ sm->port_per_thread = (0xffff - 1024) / _vec_len (sm->workers); @@ -1844,9 +2073,8 @@ nat44_ed_set_frame_queue_nelts (u32 frame_queue_nelts) } static void -snat_update_outside_fib (ip4_main_t * im, uword opaque, - u32 sw_if_index, u32 new_fib_index, - u32 old_fib_index) +nat44_ed_update_outside_fib_cb (ip4_main_t *im, uword opaque, u32 sw_if_index, + u32 new_fib_index, u32 old_fib_index) { snat_main_t *sm = &snat_main; nat_outside_fib_t *outside_fib; @@ -1860,51 +2088,49 @@ snat_update_outside_fib (ip4_main_t * im, uword opaque, return; } - /* *INDENT-OFF* */ pool_foreach (i, sm->interfaces) - { + { if (i->sw_if_index == sw_if_index) { - if (!(nat_interface_is_outside (i))) + if (!(nat44_ed_is_interface_outside (i))) return; match = 1; } } pool_foreach (i, sm->output_feature_interfaces) - { + { if (i->sw_if_index == sw_if_index) { - if (!(nat_interface_is_outside (i))) + if (!(nat44_ed_is_interface_outside (i))) return; match = 1; } } - /* *INDENT-ON* */ if (!match) return; vec_foreach (outside_fib, sm->outside_fibs) - { - if (outside_fib->fib_index == old_fib_index) - { - outside_fib->refcount--; - if (!outside_fib->refcount) - vec_del1 (sm->outside_fibs, outside_fib - sm->outside_fibs); - break; - } - } + { + if (outside_fib->fib_index == old_fib_index) + { + outside_fib->refcount--; + if (!outside_fib->refcount) + vec_del1 (sm->outside_fibs, outside_fib - sm->outside_fibs); + break; + } + } vec_foreach (outside_fib, sm->outside_fibs) - { - if (outside_fib->fib_index == new_fib_index) - { - outside_fib->refcount++; - is_add = 0; - break; - } - } + { + if (outside_fib->fib_index == new_fib_index) + { + outside_fib->refcount++; + is_add = 0; + break; + } + } if (is_add) { @@ -1914,26 +2140,17 @@ snat_update_outside_fib (ip4_main_t * im, uword opaque, } } -static void -snat_update_outside_fib (ip4_main_t * im, uword opaque, - u32 sw_if_index, u32 new_fib_index, - u32 old_fib_index); +static void nat44_ed_update_outside_fib_cb (ip4_main_t *im, uword opaque, + u32 sw_if_index, u32 new_fib_index, + u32 old_fib_index); -static void -snat_ip4_add_del_interface_address_cb (ip4_main_t * im, - uword opaque, - u32 sw_if_index, - ip4_address_t * address, - u32 address_length, - u32 if_address_index, u32 is_delete); +static void nat44_ed_add_del_interface_address_cb ( + ip4_main_t *im, uword opaque, u32 sw_if_index, ip4_address_t *address, + u32 address_length, u32 if_address_index, u32 is_delete); -static void -nat_ip4_add_del_addr_only_sm_cb (ip4_main_t * im, - uword opaque, - u32 sw_if_index, - ip4_address_t * address, - u32 address_length, - u32 if_address_index, u32 is_delete); +static void nat44_ed_add_del_static_mapping_cb ( + ip4_main_t *im, uword opaque, u32 sw_if_index, ip4_address_t *address, + u32 address_length, u32 if_address_index, u32 is_delete); void test_key_calc_split () @@ -1955,8 +2172,8 @@ test_key_calc_split () u32 thread_index = 3000000001; u32 session_index = 3000000221; clib_bihash_kv_16_8_t kv; - init_ed_kv (&kv, l_addr, l_port, r_addr, r_port, fib_index, proto, - thread_index, session_index); + init_ed_kv (&kv, l_addr.as_u32, l_port, r_addr.as_u32, r_port, fib_index, + proto, thread_index, session_index); ip4_address_t l_addr2; ip4_address_t r_addr2; clib_memset (&l_addr2, 0, sizeof (l_addr2)); @@ -1975,30 +2192,20 @@ test_key_calc_split () ASSERT (fib_index == fib_index2); ASSERT (thread_index == ed_value_get_thread_index (&kv)); ASSERT (session_index == ed_value_get_session_index (&kv)); - - fib_index = 7001; - proto = 5; - nat_protocol_t proto3 = ~0; - u64 key = calc_nat_key (l_addr, l_port, fib_index, proto); - split_nat_key (key, &l_addr2, &l_port2, &fib_index2, &proto3); - ASSERT (l_addr.as_u32 == l_addr2.as_u32); - ASSERT (l_port == l_port2); - ASSERT (proto == proto3); - ASSERT (fib_index == fib_index2); } static clib_error_t * nat_ip_table_add_del (vnet_main_t * vnm, u32 table_id, u32 is_add) { u32 fib_index; - - // TODO: consider removing all NAT interfaces - if (!is_add) + if (!is_add) + { + fib_index = ip4_fib_index_from_table_id (table_id); + if (fib_index != ~0) { - fib_index = ip4_fib_index_from_table_id (table_id); - if (fib_index != ~0) - expire_per_vrf_sessions (fib_index); + expire_per_vrf_sessions (fib_index); } + } return 0; } @@ -2077,11 +2284,14 @@ nat_init (vlib_main_t * vm) sm->log_level = NAT_LOG_ERROR; nat44_set_node_indexes (sm, vm); + sm->log_class = vlib_log_register_class ("nat", 0); nat_ipfix_logging_init (vm); nat_init_simple_counter (sm->total_sessions, "total-sessions", "/nat44-ed/total-sessions"); + sm->max_cfg_sessions_gauge = + vlib_stats_add_gauge ("/nat44-ed/max-cfg-sessions"); #define _(x) \ nat_init_simple_counter (sm->counters.fastpath.in2out.x, #x, \ @@ -2114,23 +2324,24 @@ nat_init (vlib_main_t * vm) /* Use all available workers by default */ if (sm->num_workers > 1) { - for (i = 0; i < sm->num_workers; i++) bitmap = clib_bitmap_set (bitmap, i, 1); snat_set_workers (bitmap); clib_bitmap_free (bitmap); } else - sm->per_thread_data[0].snat_thread_index = 0; + { + sm->per_thread_data[0].snat_thread_index = 0; + } /* callbacks to call when interface address changes. */ - cbi.function = snat_ip4_add_del_interface_address_cb; + cbi.function = nat44_ed_add_del_interface_address_cb; vec_add1 (sm->ip4_main->add_del_interface_address_callbacks, cbi); - cbi.function = nat_ip4_add_del_addr_only_sm_cb; + cbi.function = nat44_ed_add_del_static_mapping_cb; vec_add1 (sm->ip4_main->add_del_interface_address_callbacks, cbi); /* callbacks to call when interface to table biding changes */ - cbt.function = snat_update_outside_fib; + cbt.function = nat44_ed_update_outside_fib_cb; vec_add1 (sm->ip4_main->table_bind_callbacks, cbt); sm->fib_src_low = @@ -2155,34 +2366,17 @@ nat44_plugin_enable (nat44_config_t c) fail_if_enabled (); - // UPDATE based on these appropriate API/CLI - // c.static_mapping_only + c.connection_tracking - // - supported in NAT EI & NAT ED - // c.out2in_dpo, c.static_mapping_only - // - supported in NAT EI - - if (c.static_mapping_only && !c.connection_tracking) - { - nat_log_err ("unsupported combination of configuration"); - return 1; - } - - // nat44 feature configuration - sm->static_mapping_only = c.static_mapping_only; - sm->static_mapping_connection_tracking = c.connection_tracking; - sm->forwarding_enabled = 0; sm->mss_clamping = 0; - sm->pat = (!c.static_mapping_only || - (c.static_mapping_only && c.connection_tracking)); if (!c.sessions) c.sessions = 63 * 1024; sm->max_translations_per_thread = c.sessions; + vlib_stats_set_gauge (sm->max_cfg_sessions_gauge, + sm->max_translations_per_thread); sm->translation_buckets = nat_calc_bihash_buckets (c.sessions); - // ED only feature vec_add1 (sm->max_translations_per_fib, sm->max_translations_per_thread); sm->inside_vrf_id = c.inside_vrf; @@ -2194,11 +2388,10 @@ nat44_plugin_enable (nat44_config_t c) sm->outside_fib_index = fib_table_find_or_create_and_lock ( FIB_PROTOCOL_IP4, c.outside_vrf, sm->fib_src_hi); - sm->worker_in2out_cb = nat44_ed_get_worker_in2out_cb; - sm->worker_out2in_cb = nat44_ed_get_worker_out2in_cb; - nat44_ed_db_init (sm->max_translations_per_thread, sm->translation_buckets); + nat44_ed_init_tcp_state_stable (sm); + nat_affinity_enable (); nat_reset_timeouts (&sm->timeouts); @@ -2206,7 +2399,28 @@ nat44_plugin_enable (nat44_config_t c) vlib_zero_simple_counter (&sm->total_sessions, 0); if (!sm->frame_queue_nelts) - sm->frame_queue_nelts = NAT_FQ_NELTS_DEFAULT; + { + sm->frame_queue_nelts = NAT_FQ_NELTS_DEFAULT; + } + + if (sm->num_workers > 1) + { + if (sm->fq_in2out_index == ~0) + { + sm->fq_in2out_index = vlib_frame_queue_main_init ( + sm->in2out_node_index, sm->frame_queue_nelts); + } + if (sm->fq_out2in_index == ~0) + { + sm->fq_out2in_index = vlib_frame_queue_main_init ( + sm->out2in_node_index, sm->frame_queue_nelts); + } + if (sm->fq_in2out_output_index == ~0) + { + sm->fq_in2out_output_index = vlib_frame_queue_main_init ( + sm->in2out_output_node_index, sm->frame_queue_nelts); + } + } sm->enabled = 1; sm->rconfig = c; @@ -2214,86 +2428,168 @@ nat44_plugin_enable (nat44_config_t c) return 0; } -void -nat44_addresses_free (snat_address_t ** addresses) +int +nat44_ed_del_addresses () { - snat_address_t *ap; - vec_foreach (ap, *addresses) + snat_main_t *sm = &snat_main; + snat_address_t *a, *vec; + int error = 0; + + vec = vec_dup (sm->addresses); + vec_foreach (a, vec) + { + error = nat44_ed_del_address (a->addr, 0); + if (error) + { + nat_log_err ("error occurred while removing adderess"); + } + } + vec_free (vec); + vec_free (sm->addresses); + sm->addresses = 0; + + vec = vec_dup (sm->twice_nat_addresses); + vec_foreach (a, vec) { - #define _(N, i, n, s) \ - vec_free (ap->busy_##n##_ports_per_thread); - foreach_nat_protocol - #undef _ + error = nat44_ed_del_address (a->addr, 1); + if (error) + { + nat_log_err ("error occurred while removing adderess"); + } } - vec_free (*addresses); - *addresses = 0; + vec_free (vec); + vec_free (sm->twice_nat_addresses); + sm->twice_nat_addresses = 0; + + vec_free (sm->addr_to_resolve); + sm->addr_to_resolve = 0; + + return error; } int -nat44_plugin_disable () +nat44_ed_del_interfaces () { snat_main_t *sm = &snat_main; - snat_interface_t *i, *vec; + snat_interface_t *i, *pool; int error = 0; - fail_if_disabled (); - - // first unregister all nodes from interfaces - vec = vec_dup (sm->interfaces); - vec_foreach (i, vec) + pool = pool_dup (sm->interfaces); + pool_foreach (i, pool) { - if (nat_interface_is_inside(i)) - error = snat_interface_add_del (i->sw_if_index, 1, 1); - if (nat_interface_is_outside(i)) - error = snat_interface_add_del (i->sw_if_index, 0, 1); + if (nat44_ed_is_interface_inside (i)) + { + error = nat44_ed_del_interface (i->sw_if_index, 1); + } + if (nat44_ed_is_interface_outside (i)) + { + error = nat44_ed_del_interface (i->sw_if_index, 0); + } if (error) - { - nat_log_err ("error occurred while removing interface %u", - i->sw_if_index); - } + { + nat_log_err ("error occurred while removing interface"); + } } - vec_free (vec); + pool_free (pool); + pool_free (sm->interfaces); sm->interfaces = 0; + return error; +} - vec = vec_dup (sm->output_feature_interfaces); - vec_foreach (i, vec) - { - if (nat_interface_is_inside(i)) - error = snat_interface_add_del_output_feature (i->sw_if_index, 1, 1); - if (nat_interface_is_outside(i)) - error = snat_interface_add_del_output_feature (i->sw_if_index, 0, 1); +int +nat44_ed_del_output_interfaces () +{ + snat_main_t *sm = &snat_main; + snat_interface_t *i, *pool; + int error = 0; + pool = pool_dup (sm->output_feature_interfaces); + pool_foreach (i, pool) + { + error = nat44_ed_del_output_interface (i->sw_if_index); if (error) - { - nat_log_err ("error occurred while removing interface %u", - i->sw_if_index); - } + { + nat_log_err ("error occurred while removing output interface"); + } } - vec_free (vec); + pool_free (pool); + pool_free (sm->output_feature_interfaces); sm->output_feature_interfaces = 0; + return error; +} + +int +nat44_ed_del_static_mappings () +{ + snat_main_t *sm = &snat_main; + snat_static_mapping_t *m, *pool; + int error = 0; + + pool = pool_dup (sm->static_mappings); + pool_foreach (m, pool) + { + error = nat44_ed_del_static_mapping_internal ( + m->local_addr, m->external_addr, m->local_port, m->external_port, + m->proto, m->vrf_id, m->flags); + if (error) + { + nat_log_err ("error occurred while removing mapping"); + } + } + pool_free (pool); + pool_free (sm->static_mappings); + sm->static_mappings = 0; + + vec_free (sm->sm_to_resolve); + sm->sm_to_resolve = 0; + + return error; +} + +int +nat44_plugin_disable () +{ + snat_main_per_thread_data_t *tsm; + snat_main_t *sm = &snat_main; + int rc, error = 0; + + fail_if_disabled (); + + rc = nat44_ed_del_static_mappings (); + if (rc) + error = 1; + + rc = nat44_ed_del_addresses (); + if (rc) + error = 1; + + rc = nat44_ed_del_interfaces (); + if (rc) + error = 1; + + rc = nat44_ed_del_output_interfaces (); + if (rc) + error = 1; vec_free (sm->max_translations_per_fib); + sm->max_translations_per_fib = 0; - nat44_ed_db_free (); + clib_bihash_free_16_8 (&sm->flow_hash); - nat44_addresses_free (&sm->addresses); - nat44_addresses_free (&sm->twice_nat_addresses); + vec_foreach (tsm, sm->per_thread_data) + { + nat44_ed_worker_db_free (tsm); + } - vec_free (sm->to_resolve); - vec_free (sm->auto_add_sw_if_indices); - vec_free (sm->auto_add_sw_if_indices_twice_nat); + clib_memset (&sm->rconfig, 0, sizeof (sm->rconfig)); - sm->to_resolve = 0; - sm->auto_add_sw_if_indices = 0; - sm->auto_add_sw_if_indices_twice_nat = 0; + nat_affinity_disable (); sm->forwarding_enabled = 0; - sm->enabled = 0; - clib_memset (&sm->rconfig, 0, sizeof (sm->rconfig)); - return 0; + return error; } void @@ -2307,14 +2603,16 @@ nat44_ed_forwarding_enable_disable (u8 is_enable) sm->forwarding_enabled = is_enable != 0; - if (is_enable) - return; + if (!sm->enabled || is_enable) + { + return; + } vec_foreach (tsm, sm->per_thread_data) { pool_foreach (s, tsm->sessions) { - if (is_fwd_bypass_session (s)) + if (na44_ed_is_fwd_bypass_session (s)) { vec_add1 (ses_to_be_removed, s - tsm->sessions); } @@ -2322,7 +2620,7 @@ nat44_ed_forwarding_enable_disable (u8 is_enable) vec_foreach (ses_index, ses_to_be_removed) { s = pool_elt_at_index (tsm->sessions, ses_index[0]); - nat_free_session_data (sm, s, tsm - sm->per_thread_data, 0); + nat44_ed_free_session_data (sm, s, tsm - sm->per_thread_data, 0); nat_ed_session_delete (sm, s, tsm - sm->per_thread_data, 1); } @@ -2330,141 +2628,97 @@ nat44_ed_forwarding_enable_disable (u8 is_enable) } } -void -snat_free_outside_address_and_port (snat_address_t *addresses, - u32 thread_index, ip4_address_t *addr, - u16 port, nat_protocol_t protocol) +static_always_inline snat_static_mapping_t * +nat44_ed_sm_match (snat_main_t *sm, ip4_address_t match_addr, u16 match_port, + u32 match_fib_index, ip_protocol_t match_protocol, + int by_external) { - snat_main_t *sm = &snat_main; - snat_address_t *a; - u32 address_index; - u16 port_host_byte_order = clib_net_to_host_u16 (port); - - for (address_index = 0; address_index < vec_len (addresses); - address_index++) + snat_static_mapping_t *m; + if (!by_external) { - if (addresses[address_index].addr.as_u32 == addr->as_u32) - break; - } + m = nat44_ed_sm_i2o_lookup (sm, match_addr, match_port, match_fib_index, + match_protocol); + if (m) + return m; - ASSERT (address_index < vec_len (addresses)); + /* Try address only mapping */ + m = nat44_ed_sm_i2o_lookup (sm, match_addr, 0, match_fib_index, 0); + if (m) + return m; - a = addresses + address_index; + if (sm->inside_fib_index != match_fib_index) + { + m = nat44_ed_sm_i2o_lookup (sm, match_addr, match_port, + sm->inside_fib_index, match_protocol); + if (m) + return m; - switch (protocol) - { -#define _(N, i, n, s) \ - case NAT_PROTOCOL_##N: \ - ASSERT (a->busy_##n##_port_refcounts[port_host_byte_order] >= 1); \ - --a->busy_##n##_port_refcounts[port_host_byte_order]; \ - a->busy_##n##_ports--; \ - a->busy_##n##_ports_per_thread[thread_index]--; \ - break; - foreach_nat_protocol -#undef _ - default : nat_elog_info (sm, "unknown protocol"); - return; - } -} + /* Try address only mapping */ + m = nat44_ed_sm_i2o_lookup (sm, match_addr, 0, sm->inside_fib_index, + 0); + if (m) + return m; + } + if (sm->outside_fib_index != match_fib_index) + { + m = nat44_ed_sm_i2o_lookup (sm, match_addr, match_port, + sm->outside_fib_index, match_protocol); + if (m) + return m; -int -nat_set_outside_address_and_port (snat_address_t *addresses, u32 thread_index, - ip4_address_t addr, u16 port, - nat_protocol_t protocol) -{ - snat_main_t *sm = &snat_main; - snat_address_t *a = 0; - u32 address_index; - u16 port_host_byte_order = clib_net_to_host_u16 (port); - - for (address_index = 0; address_index < vec_len (addresses); - address_index++) - { - if (addresses[address_index].addr.as_u32 != addr.as_u32) - continue; - - a = addresses + address_index; - switch (protocol) - { -#define _(N, j, n, s) \ - case NAT_PROTOCOL_##N: \ - if (a->busy_##n##_port_refcounts[port_host_byte_order]) \ - return VNET_API_ERROR_INSTANCE_IN_USE; \ - ++a->busy_##n##_port_refcounts[port_host_byte_order]; \ - a->busy_##n##_ports_per_thread[thread_index]++; \ - a->busy_##n##_ports++; \ - return 0; - foreach_nat_protocol -#undef _ - default : nat_elog_info (sm, "unknown protocol"); - return 1; + /* Try address only mapping */ + m = nat44_ed_sm_i2o_lookup (sm, match_addr, 0, sm->outside_fib_index, + 0); + if (m) + return m; } } + else + { + m = + nat44_ed_sm_o2i_lookup (sm, match_addr, match_port, 0, match_protocol); + if (m) + return m; - return VNET_API_ERROR_NO_SUCH_ENTRY; + /* Try address only mapping */ + m = nat44_ed_sm_o2i_lookup (sm, match_addr, 0, 0, 0); + if (m) + return m; + } + return 0; } int -snat_static_mapping_match (snat_main_t * sm, - ip4_address_t match_addr, - u16 match_port, - u32 match_fib_index, - nat_protocol_t match_protocol, - ip4_address_t * mapping_addr, - u16 * mapping_port, - u32 * mapping_fib_index, - u8 by_external, - u8 * is_addr_only, - twice_nat_type_t * twice_nat, - lb_nat_type_t * lb, ip4_address_t * ext_host_addr, - u8 * is_identity_nat, snat_static_mapping_t ** out) -{ - clib_bihash_kv_8_8_t kv, value; - clib_bihash_8_8_t *mapping_hash; +snat_static_mapping_match (vlib_main_t *vm, snat_main_t *sm, + ip4_address_t match_addr, u16 match_port, + u32 match_fib_index, ip_protocol_t match_protocol, + ip4_address_t *mapping_addr, u16 *mapping_port, + u32 *mapping_fib_index, int by_external, + u8 *is_addr_only, twice_nat_type_t *twice_nat, + lb_nat_type_t *lb, ip4_address_t *ext_host_addr, + u8 *is_identity_nat, snat_static_mapping_t **out) +{ snat_static_mapping_t *m; u32 rand, lo = 0, hi, mid, *tmp = 0, i; nat44_lb_addr_port_t *local; u8 backend_index; - if (!by_external) - { - mapping_hash = &sm->static_mapping_by_local; - init_nat_k (&kv, match_addr, match_port, match_fib_index, - match_protocol); - if (clib_bihash_search_8_8 (mapping_hash, &kv, &value)) - { - /* Try address only mapping */ - init_nat_k (&kv, match_addr, 0, match_fib_index, 0); - if (clib_bihash_search_8_8 (mapping_hash, &kv, &value)) - return 1; - } - } - else + m = nat44_ed_sm_match (sm, match_addr, match_port, match_fib_index, + match_protocol, by_external); + if (!m) { - mapping_hash = &sm->static_mapping_by_external; - init_nat_k (&kv, match_addr, match_port, 0, match_protocol); - if (clib_bihash_search_8_8 (mapping_hash, &kv, &value)) - { - /* Try address only mapping */ - init_nat_k (&kv, match_addr, 0, 0, 0); - if (clib_bihash_search_8_8 (mapping_hash, &kv, &value)) - return 1; - } + return 1; } - m = pool_elt_at_index (sm->static_mappings, value.value); - if (by_external) { - if (is_lb_static_mapping (m)) + if (is_sm_lb (m->flags)) { if (PREDICT_FALSE (lb != 0)) *lb = m->affinity ? AFFINITY_LB_NAT : LB_NAT; - if (m->affinity && !nat_affinity_find_and_lock (ext_host_addr[0], - match_addr, - match_protocol, - match_port, - &backend_index)) + if (m->affinity && !nat_affinity_find_and_lock ( + vm, ext_host_addr[0], match_addr, + match_protocol, match_port, &backend_index)) { local = pool_elt_at_index (m->locals, backend_index); *mapping_addr = local->addr; @@ -2484,8 +2738,8 @@ snat_static_mapping_match (snat_main_t * sm, .src_address = local->addr, }; - if (sm->worker_in2out_cb (0, &ip, m->fib_index, 0) == - thread_index) + if (nat44_ed_get_in2out_worker_index (0, &ip, m->fib_index, + 0) == thread_index) { vec_add1 (tmp, i); } @@ -2531,28 +2785,39 @@ snat_static_mapping_match (snat_main_t * sm, *mapping_fib_index = m->fib_index; *mapping_addr = m->local_addr; /* Address only mapping doesn't change port */ - *mapping_port = is_addr_only_static_mapping (m) ? match_port - : m->local_port; + *mapping_port = + is_sm_addr_only (m->flags) ? match_port : m->local_port; } } else { *mapping_addr = m->external_addr; /* Address only mapping doesn't change port */ - *mapping_port = is_addr_only_static_mapping (m) ? match_port - : m->external_port; + *mapping_port = + is_sm_addr_only (m->flags) ? match_port : m->external_port; *mapping_fib_index = sm->outside_fib_index; } end: if (PREDICT_FALSE (is_addr_only != 0)) - *is_addr_only = is_addr_only_static_mapping (m); + *is_addr_only = is_sm_addr_only (m->flags); if (PREDICT_FALSE (twice_nat != 0)) - *twice_nat = m->twice_nat; + { + *twice_nat = TWICE_NAT_DISABLED; + + if (is_sm_twice_nat (m->flags)) + { + *twice_nat = TWICE_NAT; + } + else if (is_sm_self_twice_nat (m->flags)) + { + *twice_nat = TWICE_NAT_SELF; + } + } if (PREDICT_FALSE (is_identity_nat != 0)) - *is_identity_nat = is_identity_static_mapping (m); + *is_identity_nat = is_sm_identity_nat (m->flags); if (out != 0) *out = m; @@ -2560,9 +2825,9 @@ end: return 0; } -static u32 -nat44_ed_get_worker_in2out_cb (vlib_buffer_t *b, ip4_header_t *ip, - u32 rx_fib_index, u8 is_output) +u32 +nat44_ed_get_in2out_worker_index (vlib_buffer_t *b, ip4_header_t *ip, + u32 rx_fib_index, u8 is_output) { snat_main_t *sm = &snat_main; u32 next_worker_index = sm->first_worker_index; @@ -2571,61 +2836,94 @@ nat44_ed_get_worker_in2out_cb (vlib_buffer_t *b, ip4_header_t *ip, clib_bihash_kv_16_8_t kv16, value16; u32 fib_index = rx_fib_index; - if (PREDICT_FALSE (is_output)) - { - fib_index = sm->outside_fib_index; - nat_outside_fib_t *outside_fib; - fib_node_index_t fei = FIB_NODE_INDEX_INVALID; - fib_prefix_t pfx = { - .fp_proto = FIB_PROTOCOL_IP4, - .fp_len = 32, - .fp_addr = { - .ip4.as_u32 = ip->dst_address.as_u32, + if (b) + { + if (PREDICT_FALSE (is_output)) + { + fib_index = sm->outside_fib_index; + nat_outside_fib_t *outside_fib; + fib_node_index_t fei = FIB_NODE_INDEX_INVALID; + fib_prefix_t pfx = { + .fp_proto = FIB_PROTOCOL_IP4, + .fp_len = 32, + .fp_addr = { + .ip4.as_u32 = ip->dst_address.as_u32, + } , + }; + + switch (vec_len (sm->outside_fibs)) + { + case 0: + fib_index = sm->outside_fib_index; + break; + case 1: + fib_index = sm->outside_fibs[0].fib_index; + break; + default: + vec_foreach (outside_fib, sm->outside_fibs) + { + fei = fib_table_lookup (outside_fib->fib_index, &pfx); + if (FIB_NODE_INDEX_INVALID != fei) + { + if (fib_entry_get_resolving_interface (fei) != ~0) + { + fib_index = outside_fib->fib_index; + break; + } } - , - }; + } + break; + } + } - switch (vec_len (sm->outside_fibs)) + if (PREDICT_FALSE (ip->protocol == IP_PROTOCOL_ICMP)) { - case 0: - fib_index = sm->outside_fib_index; - break; - case 1: - fib_index = sm->outside_fibs[0].fib_index; - break; - default: - /* *INDENT-OFF* */ - vec_foreach (outside_fib, sm->outside_fibs) - { - fei = fib_table_lookup (outside_fib->fib_index, &pfx); - if (FIB_NODE_INDEX_INVALID != fei) - { - if (fib_entry_get_resolving_interface (fei) != ~0) - { - fib_index = outside_fib->fib_index; - break; - } - } - } - /* *INDENT-ON* */ - break; + ip4_address_t lookup_saddr, lookup_daddr; + u16 lookup_sport, lookup_dport; + u8 lookup_protocol; + + if (!nat_get_icmp_session_lookup_values ( + b, ip, &lookup_saddr, &lookup_sport, &lookup_daddr, + &lookup_dport, &lookup_protocol)) + { + init_ed_k (&kv16, lookup_saddr.as_u32, lookup_sport, + lookup_daddr.as_u32, lookup_dport, rx_fib_index, + lookup_protocol); + if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv16, &value16)) + { + next_worker_index = ed_value_get_thread_index (&value16); + vnet_buffer2 (b)->nat.cached_session_index = + ed_value_get_session_index (&value16); + goto out; + } + } } - } - if (b) - { - init_ed_k (&kv16, ip->src_address, vnet_buffer (b)->ip.reass.l4_src_port, - ip->dst_address, vnet_buffer (b)->ip.reass.l4_dst_port, - fib_index, ip->protocol); + init_ed_k (&kv16, ip->src_address.as_u32, + vnet_buffer (b)->ip.reass.l4_src_port, ip->dst_address.as_u32, + vnet_buffer (b)->ip.reass.l4_dst_port, fib_index, + ip->protocol); - if (PREDICT_TRUE ( - !clib_bihash_search_16_8 (&sm->flow_hash, &kv16, &value16))) + if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv16, &value16)) { next_worker_index = ed_value_get_thread_index (&value16); vnet_buffer2 (b)->nat.cached_session_index = ed_value_get_session_index (&value16); goto out; } + + // dst NAT + init_ed_k (&kv16, ip->dst_address.as_u32, + vnet_buffer (b)->ip.reass.l4_dst_port, ip->src_address.as_u32, + vnet_buffer (b)->ip.reass.l4_src_port, rx_fib_index, + ip->protocol); + if (!clib_bihash_search_16_8 (&sm->flow_hash, &kv16, &value16)) + { + next_worker_index = ed_value_get_thread_index (&value16); + vnet_buffer2 (b)->nat.cached_dst_nat_session_index = + ed_value_get_session_index (&value16); + goto out; + } } hash = ip->src_address.as_u32 + (ip->src_address.as_u32 >> 8) + @@ -2655,48 +2953,21 @@ out: return next_worker_index; } -static u32 -nat44_ed_get_worker_out2in_cb (vlib_buffer_t * b, ip4_header_t * ip, - u32 rx_fib_index, u8 is_output) +u32 +nat44_ed_get_out2in_worker_index (vlib_buffer_t *b, ip4_header_t *ip, + u32 rx_fib_index, u8 is_output) { snat_main_t *sm = &snat_main; - clib_bihash_kv_8_8_t kv, value; clib_bihash_kv_16_8_t kv16, value16; - snat_main_per_thread_data_t *tsm; - u32 proto, next_worker_index = 0; - udp_header_t *udp; + u8 proto, next_worker_index = 0; u16 port; snat_static_mapping_t *m; u32 hash; - - proto = ip_proto_to_nat_proto (ip->protocol); - - if (PREDICT_TRUE (proto == NAT_PROTOCOL_UDP || proto == NAT_PROTOCOL_TCP)) - { - udp = ip4_next_header (ip); - - init_ed_k (&kv16, ip->dst_address, vnet_buffer (b)->ip.reass.l4_dst_port, - ip->src_address, vnet_buffer (b)->ip.reass.l4_src_port, - rx_fib_index, ip->protocol); - - if (PREDICT_TRUE ( - !clib_bihash_search_16_8 (&sm->flow_hash, &kv16, &value16))) - { - tsm = - vec_elt_at_index (sm->per_thread_data, - ed_value_get_thread_index (&value16)); - vnet_buffer2 (b)->nat.cached_session_index = - ed_value_get_session_index (&value16); - next_worker_index = sm->first_worker_index + tsm->thread_index; - nat_elog_debug_handoff ( - sm, "HANDOFF OUT2IN (session)", next_worker_index, rx_fib_index, - clib_net_to_host_u32 (ip->src_address.as_u32), - clib_net_to_host_u32 (ip->dst_address.as_u32)); - return next_worker_index; - } - } - else if (proto == NAT_PROTOCOL_ICMP) + + proto = ip->protocol; + + if (PREDICT_FALSE (IP_PROTOCOL_ICMP == proto)) { ip4_address_t lookup_saddr, lookup_daddr; u16 lookup_sport, lookup_dport; @@ -2705,15 +2976,13 @@ nat44_ed_get_worker_out2in_cb (vlib_buffer_t * b, ip4_header_t * ip, b, ip, &lookup_saddr, &lookup_sport, &lookup_daddr, &lookup_dport, &lookup_protocol)) { - init_ed_k (&kv16, lookup_saddr, lookup_sport, lookup_daddr, - lookup_dport, rx_fib_index, lookup_protocol); + init_ed_k (&kv16, lookup_saddr.as_u32, lookup_sport, + lookup_daddr.as_u32, lookup_dport, rx_fib_index, + lookup_protocol); if (PREDICT_TRUE ( !clib_bihash_search_16_8 (&sm->flow_hash, &kv16, &value16))) { - tsm = - vec_elt_at_index (sm->per_thread_data, - ed_value_get_thread_index (&value16)); - next_worker_index = sm->first_worker_index + tsm->thread_index; + next_worker_index = ed_value_get_thread_index (&value16); nat_elog_debug_handoff ( sm, "HANDOFF OUT2IN (session)", next_worker_index, rx_fib_index, clib_net_to_host_u32 (ip->src_address.as_u32), @@ -2723,32 +2992,50 @@ nat44_ed_get_worker_out2in_cb (vlib_buffer_t * b, ip4_header_t * ip, } } + init_ed_k (&kv16, ip->src_address.as_u32, + vnet_buffer (b)->ip.reass.l4_src_port, ip->dst_address.as_u32, + vnet_buffer (b)->ip.reass.l4_dst_port, rx_fib_index, + ip->protocol); + + if (PREDICT_TRUE ( + !clib_bihash_search_16_8 (&sm->flow_hash, &kv16, &value16))) + { + vnet_buffer2 (b)->nat.cached_session_index = + ed_value_get_session_index (&value16); + next_worker_index = ed_value_get_thread_index (&value16); + nat_elog_debug_handoff (sm, "HANDOFF OUT2IN (session)", + next_worker_index, rx_fib_index, + clib_net_to_host_u32 (ip->src_address.as_u32), + clib_net_to_host_u32 (ip->dst_address.as_u32)); + return next_worker_index; + } + /* first try static mappings without port */ if (PREDICT_FALSE (pool_elts (sm->static_mappings))) { - init_nat_k (&kv, ip->dst_address, 0, 0, 0); - if (!clib_bihash_search_8_8 - (&sm->static_mapping_by_external, &kv, &value)) + m = nat44_ed_sm_o2i_lookup (sm, ip->dst_address, 0, 0, proto); + if (m) { - m = pool_elt_at_index (sm->static_mappings, value.value); - next_worker_index = m->workers[0]; - goto done; + { + next_worker_index = m->workers[0]; + goto done; + } } } /* unknown protocol */ - if (PREDICT_FALSE (proto == NAT_PROTOCOL_OTHER)) + if (PREDICT_FALSE (nat44_ed_is_unk_proto (proto))) { /* use current thread */ next_worker_index = vlib_get_thread_index (); goto done; } - udp = ip4_next_header (ip); port = vnet_buffer (b)->ip.reass.l4_dst_port; if (PREDICT_FALSE (ip->protocol == IP_PROTOCOL_ICMP)) { + udp_header_t *udp = ip4_next_header (ip); icmp46_header_t *icmp = (icmp46_header_t *) udp; icmp_echo_header_t *echo = (icmp_echo_header_t *) (icmp + 1); if (!icmp_type_is_error_message @@ -2758,17 +3045,18 @@ nat44_ed_get_worker_out2in_cb (vlib_buffer_t * b, ip4_header_t * ip, { /* if error message, then it's not fragmented and we can access it */ ip4_header_t *inner_ip = (ip4_header_t *) (echo + 1); - proto = ip_proto_to_nat_proto (inner_ip->protocol); + proto = inner_ip->protocol; void *l4_header = ip4_next_header (inner_ip); switch (proto) { - case NAT_PROTOCOL_ICMP: + case IP_PROTOCOL_ICMP: icmp = (icmp46_header_t *) l4_header; echo = (icmp_echo_header_t *) (icmp + 1); port = echo->identifier; break; - case NAT_PROTOCOL_UDP: - case NAT_PROTOCOL_TCP: + case IP_PROTOCOL_UDP: + /* breakthrough */ + case IP_PROTOCOL_TCP: port = ((tcp_udp_header_t *) l4_header)->src_port; break; default: @@ -2781,12 +3069,10 @@ nat44_ed_get_worker_out2in_cb (vlib_buffer_t * b, ip4_header_t * ip, /* try static mappings with port */ if (PREDICT_FALSE (pool_elts (sm->static_mappings))) { - init_nat_k (&kv, ip->dst_address, port, 0, proto); - if (!clib_bihash_search_8_8 - (&sm->static_mapping_by_external, &kv, &value)) + m = nat44_ed_sm_o2i_lookup (sm, ip->dst_address, port, 0, proto); + if (m) { - m = pool_elt_at_index (sm->static_mappings, value.value); - if (!is_lb_static_mapping (m)) + if (!is_sm_lb (m->flags)) { next_worker_index = m->workers[0]; goto done; @@ -2859,6 +3145,9 @@ nat44_update_session_limit (u32 session_limit, u32 vrf_id) return 1; sm->max_translations_per_thread = nat44_get_max_session_limit (); + vlib_stats_set_gauge (sm->max_cfg_sessions_gauge, + sm->max_translations_per_thread); + sm->translation_buckets = nat_calc_bihash_buckets (sm->max_translations_per_thread); @@ -2912,30 +3201,13 @@ nat44_ed_db_init (u32 translations, u32 translation_buckets) { snat_main_t *sm = &snat_main; snat_main_per_thread_data_t *tsm; - u32 static_mapping_buckets = 1024; - u32 static_mapping_memory_size = 64 << 20; reinit_ed_flow_hash (); - clib_bihash_init_8_8 (&sm->static_mapping_by_local, - "static_mapping_by_local", static_mapping_buckets, - static_mapping_memory_size); - clib_bihash_set_kvp_format_fn_8_8 (&sm->static_mapping_by_local, - format_static_mapping_kvp); - - clib_bihash_init_8_8 (&sm->static_mapping_by_external, - "static_mapping_by_external", static_mapping_buckets, - static_mapping_memory_size); - clib_bihash_set_kvp_format_fn_8_8 (&sm->static_mapping_by_external, - format_static_mapping_kvp); - - if (sm->pat) + vec_foreach (tsm, sm->per_thread_data) { - vec_foreach (tsm, sm->per_thread_data) - { - nat44_ed_worker_db_init (tsm, sm->max_translations_per_thread, - sm->translation_buckets); - } + nat44_ed_worker_db_init (tsm, sm->max_translations_per_thread, + sm->translation_buckets); } } @@ -2947,26 +3219,6 @@ nat44_ed_worker_db_free (snat_main_per_thread_data_t *tsm) vec_free (tsm->per_vrf_sessions_vec); } -static void -nat44_ed_db_free () -{ - snat_main_t *sm = &snat_main; - snat_main_per_thread_data_t *tsm; - - pool_free (sm->static_mappings); - clib_bihash_free_16_8 (&sm->flow_hash); - clib_bihash_free_8_8 (&sm->static_mapping_by_local); - clib_bihash_free_8_8 (&sm->static_mapping_by_external); - - if (sm->pat) - { - vec_foreach (tsm, sm->per_thread_data) - { - nat44_ed_worker_db_free (tsm); - } - } -} - void nat44_ed_sessions_clear () { @@ -2975,252 +3227,281 @@ nat44_ed_sessions_clear () reinit_ed_flow_hash (); - if (sm->pat) + vec_foreach (tsm, sm->per_thread_data) { - vec_foreach (tsm, sm->per_thread_data) - { - - nat44_ed_worker_db_free (tsm); - nat44_ed_worker_db_init (tsm, sm->max_translations_per_thread, - sm->translation_buckets); - } + nat44_ed_worker_db_free (tsm); + nat44_ed_worker_db_init (tsm, sm->max_translations_per_thread, + sm->translation_buckets); } vlib_zero_simple_counter (&sm->total_sessions, 0); } static void -nat_ip4_add_del_addr_only_sm_cb (ip4_main_t * im, - uword opaque, - u32 sw_if_index, - ip4_address_t * address, - u32 address_length, - u32 if_address_index, u32 is_delete) +nat44_ed_add_del_static_mapping_cb (ip4_main_t *im, uword opaque, + u32 sw_if_index, ip4_address_t *address, + u32 address_length, u32 if_address_index, + u32 is_delete) { + snat_static_mapping_resolve_t *rp; snat_main_t *sm = &snat_main; - snat_static_map_resolve_t *rp; - snat_static_mapping_t *m; - clib_bihash_kv_8_8_t kv, value; - int i, rv; - ip4_address_t l_addr; + int rv = 0; if (!sm->enabled) - return; - - for (i = 0; i < vec_len (sm->to_resolve); i++) { - rp = sm->to_resolve + i; - if (rp->addr_only == 0) - continue; - if (rp->sw_if_index == sw_if_index) - goto match; + return; } - return; + vec_foreach (rp, sm->sm_to_resolve) + { + if (sw_if_index == rp->sw_if_index) + { + if (is_delete) + { + if (rp->is_resolved) + { + rv = nat44_ed_del_static_mapping_internal ( + rp->l_addr, address[0], rp->l_port, rp->e_port, rp->proto, + rp->vrf_id, rp->flags); + if (rv) + { + nat_log_err ("ed del static mapping failed"); + } + else + { + rp->is_resolved = 0; + } + } + } + else + { + if (!rp->is_resolved) + { + rv = nat44_ed_add_static_mapping_internal ( + rp->l_addr, address[0], rp->l_port, rp->e_port, rp->proto, + rp->vrf_id, ~0, rp->flags, rp->pool_addr, rp->tag); + if (rv) + { + nat_log_err ("ed add static mapping failed"); + } + else + { + rp->is_resolved = 1; + } + } + } + } + } +} -match: - init_nat_k (&kv, *address, rp->addr_only ? 0 : rp->e_port, - sm->outside_fib_index, rp->addr_only ? 0 : rp->proto); - if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) - m = 0; - else - m = pool_elt_at_index (sm->static_mappings, value.value); +static int +nat44_ed_get_addr_resolve_record (u32 sw_if_index, u8 twice_nat, int *out) +{ + snat_main_t *sm = &snat_main; + snat_address_resolve_t *rp; + int i; - if (!is_delete) + for (i = 0; i < vec_len (sm->addr_to_resolve); i++) { - /* Don't trip over lease renewal, static config */ - if (m) - return; + rp = sm->addr_to_resolve + i; + + if ((rp->sw_if_index == sw_if_index) && (rp->is_twice_nat == twice_nat)) + { + if (out) + { + *out = i; + } + return 0; + } } - else + return 1; +} +static int +nat44_ed_del_addr_resolve_record (u32 sw_if_index, u8 twice_nat) +{ + snat_main_t *sm = &snat_main; + int i; + if (!nat44_ed_get_addr_resolve_record (sw_if_index, twice_nat, &i)) { - if (!m) - return; + vec_del1 (sm->addr_to_resolve, i); + return 0; } - - /* Indetity mapping? */ - if (rp->l_addr.as_u32 == 0) - l_addr.as_u32 = address[0].as_u32; - else - l_addr.as_u32 = rp->l_addr.as_u32; - /* Add the static mapping */ - rv = snat_add_static_mapping (l_addr, - address[0], - rp->l_port, - rp->e_port, - rp->vrf_id, - rp->addr_only, ~0 /* sw_if_index */ , - rp->proto, !is_delete, rp->twice_nat, - rp->out2in_only, rp->tag, rp->identity_nat, - rp->pool_addr, rp->exact); - if (rv) - nat_elog_notice_X1 (sm, "snat_add_static_mapping returned %d", "i4", rv); + return 1; } static void -snat_ip4_add_del_interface_address_cb (ip4_main_t * im, - uword opaque, - u32 sw_if_index, - ip4_address_t * address, +nat44_ed_add_del_interface_address_cb (ip4_main_t *im, uword opaque, + u32 sw_if_index, ip4_address_t *address, u32 address_length, u32 if_address_index, u32 is_delete) { snat_main_t *sm = &snat_main; - snat_static_map_resolve_t *rp; - ip4_address_t l_addr; - int i, j; - int rv; + snat_address_resolve_t *arp; + snat_address_t *ap; u8 twice_nat = 0; - snat_address_t *addresses = sm->addresses; + int i, rv; if (!sm->enabled) - return; - - for (i = 0; i < vec_len (sm->auto_add_sw_if_indices); i++) { - if (sw_if_index == sm->auto_add_sw_if_indices[i]) - goto match; + return; } - for (i = 0; i < vec_len (sm->auto_add_sw_if_indices_twice_nat); i++) + if (nat44_ed_get_addr_resolve_record (sw_if_index, twice_nat, &i)) { twice_nat = 1; - addresses = sm->twice_nat_addresses; - if (sw_if_index == sm->auto_add_sw_if_indices_twice_nat[i]) - goto match; + if (nat44_ed_get_addr_resolve_record (sw_if_index, twice_nat, &i)) + { + u32 fib_index = + ip4_fib_table_get_index_for_sw_if_index (sw_if_index); + vec_foreach (ap, sm->addresses) + { + if ((fib_index == ap->fib_index) && + (address->as_u32 == ap->addr.as_u32)) + { + if (!is_delete) + { + ap->addr_len = address_length; + ap->sw_if_index = sw_if_index; + ap->net.as_u32 = (ap->addr.as_u32 >> (32 - ap->addr_len)) + << (32 - ap->addr_len); + + nat_log_debug ( + "pool addr %U binds to -> sw_if_idx: %u net: %U/%u", + format_ip4_address, &ap->addr, ap->sw_if_index, + format_ip4_address, &ap->net, ap->addr_len); + } + else + { + ap->addr_len = ~0; + } + break; + } + } + return; + } } - return; + arp = sm->addr_to_resolve + i; -match: if (!is_delete) { - /* Don't trip over lease renewal, static config */ - for (j = 0; j < vec_len (addresses); j++) - if (addresses[j].addr.as_u32 == address->as_u32) + if (arp->is_resolved) + { return; + } - (void) snat_add_address (sm, address, ~0, twice_nat); - /* Scan static map resolution vector */ - for (j = 0; j < vec_len (sm->to_resolve); j++) + rv = nat44_ed_add_address (address, ~0, arp->is_twice_nat); + if (0 == rv) { - rp = sm->to_resolve + j; - if (rp->addr_only) - continue; - /* On this interface? */ - if (rp->sw_if_index == sw_if_index) - { - /* Indetity mapping? */ - if (rp->l_addr.as_u32 == 0) - l_addr.as_u32 = address[0].as_u32; - else - l_addr.as_u32 = rp->l_addr.as_u32; - /* Add the static mapping */ - rv = snat_add_static_mapping ( - l_addr, address[0], rp->l_port, rp->e_port, rp->vrf_id, - rp->addr_only, ~0 /* sw_if_index */, rp->proto, 1, - rp->twice_nat, rp->out2in_only, rp->tag, rp->identity_nat, - rp->pool_addr, rp->exact); - if (rv) - nat_elog_notice_X1 (sm, "snat_add_static_mapping returned %d", - "i4", rv); - } + arp->is_resolved = 1; } - return; } else { - (void) snat_del_address (sm, address[0], 1, twice_nat); - return; + if (!arp->is_resolved) + { + return; + } + + rv = nat44_ed_del_address (address[0], arp->is_twice_nat); + if (0 == rv) + { + arp->is_resolved = 0; + } } } int -snat_add_interface_address (snat_main_t * sm, u32 sw_if_index, int is_del, - u8 twice_nat) +nat44_ed_add_interface_address (u32 sw_if_index, u8 twice_nat) { + snat_main_t *sm = &snat_main; ip4_main_t *ip4_main = sm->ip4_main; ip4_address_t *first_int_addr; - snat_static_map_resolve_t *rp; - u32 *indices_to_delete = 0; - int i, j; - u32 *auto_add_sw_if_indices = - twice_nat ? sm-> - auto_add_sw_if_indices_twice_nat : sm->auto_add_sw_if_indices; + snat_address_resolve_t *ap; + int rv; - first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index, 0 /* just want the address */ - ); + if (!sm->enabled) + { + return VNET_API_ERROR_UNSUPPORTED; + } - for (i = 0; i < vec_len (auto_add_sw_if_indices); i++) + if (!nat44_ed_get_addr_resolve_record (sw_if_index, twice_nat, 0)) { - if (auto_add_sw_if_indices[i] == sw_if_index) - { - if (is_del) - { - /* if have address remove it */ - if (first_int_addr) - (void) snat_del_address (sm, first_int_addr[0], 1, twice_nat); - else - { - for (j = 0; j < vec_len (sm->to_resolve); j++) - { - rp = sm->to_resolve + j; - if (rp->sw_if_index == sw_if_index) - vec_add1 (indices_to_delete, j); - } - if (vec_len (indices_to_delete)) - { - for (j = vec_len (indices_to_delete) - 1; j >= 0; j--) - vec_del1 (sm->to_resolve, j); - vec_free (indices_to_delete); - } - } - if (twice_nat) - vec_del1 (sm->auto_add_sw_if_indices_twice_nat, i); - else - vec_del1 (sm->auto_add_sw_if_indices, i); - } - else - return VNET_API_ERROR_VALUE_EXIST; + return VNET_API_ERROR_VALUE_EXIST; + } - return 0; + vec_add2 (sm->addr_to_resolve, ap, 1); + ap->sw_if_index = sw_if_index; + ap->is_twice_nat = twice_nat; + ap->is_resolved = 0; + + first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index, 0); + if (first_int_addr) + { + rv = nat44_ed_add_address (first_int_addr, ~0, twice_nat); + if (0 != rv) + { + nat44_ed_del_addr_resolve_record (sw_if_index, twice_nat); + return rv; } + ap->is_resolved = 1; } - if (is_del) - return VNET_API_ERROR_NO_SUCH_ENTRY; + return 0; +} - /* add to the auto-address list */ - if (twice_nat) - vec_add1 (sm->auto_add_sw_if_indices_twice_nat, sw_if_index); - else - vec_add1 (sm->auto_add_sw_if_indices, sw_if_index); +int +nat44_ed_del_interface_address (u32 sw_if_index, u8 twice_nat) +{ + snat_main_t *sm = &snat_main; + ip4_main_t *ip4_main = sm->ip4_main; + ip4_address_t *first_int_addr; + + if (!sm->enabled) + { + return VNET_API_ERROR_UNSUPPORTED; + } + + if (nat44_ed_del_addr_resolve_record (sw_if_index, twice_nat)) + { + return VNET_API_ERROR_NO_SUCH_ENTRY; + } - /* If the address is already bound - or static - add it now */ + first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index, 0); if (first_int_addr) - (void) snat_add_address (sm, first_int_addr, ~0, twice_nat); + { + return nat44_ed_del_address (first_int_addr[0], twice_nat); + } return 0; } int -nat44_del_ed_session (snat_main_t * sm, ip4_address_t * addr, u16 port, - ip4_address_t * eh_addr, u16 eh_port, u8 proto, +nat44_ed_del_session (snat_main_t *sm, ip4_address_t *addr, u16 port, + ip4_address_t *eh_addr, u16 eh_port, u8 proto, u32 vrf_id, int is_in) { ip4_header_t ip; clib_bihash_kv_16_8_t kv, value; - u32 fib_index = fib_table_find (FIB_PROTOCOL_IP4, vrf_id); + u32 fib_index; snat_session_t *s; snat_main_per_thread_data_t *tsm; + if (!sm->enabled) + { + return VNET_API_ERROR_UNSUPPORTED; + } + + fib_index = fib_table_find (FIB_PROTOCOL_IP4, vrf_id); ip.dst_address.as_u32 = ip.src_address.as_u32 = addr->as_u32; if (sm->num_workers > 1) - tsm = vec_elt_at_index (sm->per_thread_data, - sm->worker_in2out_cb (0, &ip, fib_index, 0)); + tsm = vec_elt_at_index ( + sm->per_thread_data, + nat44_ed_get_in2out_worker_index (0, &ip, fib_index, 0)); else tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers); - init_ed_k (&kv, *addr, port, *eh_addr, eh_port, fib_index, proto); + init_ed_k (&kv, addr->as_u32, port, eh_addr->as_u32, eh_port, fib_index, + proto); if (clib_bihash_search_16_8 (&sm->flow_hash, &kv, &value)) { return VNET_API_ERROR_NO_SUCH_ENTRY; @@ -3229,7 +3510,7 @@ nat44_del_ed_session (snat_main_t * sm, ip4_address_t * addr, u16 port, if (pool_is_free_index (tsm->sessions, ed_value_get_session_index (&value))) return VNET_API_ERROR_UNSPECIFIED; s = pool_elt_at_index (tsm->sessions, ed_value_get_session_index (&value)); - nat_free_session_data (sm, s, tsm - sm->per_thread_data, 0); + nat44_ed_free_session_data (sm, s, tsm - sm->per_thread_data, 0); nat_ed_session_delete (sm, s, tsm - sm->per_thread_data, 1); return 0; } @@ -3241,7 +3522,6 @@ VLIB_NODE_FN (nat_default_node) (vlib_main_t * vm, return 0; } -/* *INDENT-OFF* */ VLIB_REGISTER_NODE (nat_default_node) = { .name = "nat-default", .vector_size = sizeof (u32), @@ -3262,7 +3542,6 @@ VLIB_REGISTER_NODE (nat_default_node) = { [NAT_NEXT_OUT2IN_CLASSIFY] = "nat44-out2in-worker-handoff", }, }; -/* *INDENT-ON* */ void nat_6t_l3_l4_csum_calc (nat_6t_flow_t *f) @@ -3331,20 +3610,19 @@ nat_6t_l3_l4_csum_calc (nat_6t_flow_t *f) } } -static_always_inline int nat_6t_flow_icmp_translate (snat_main_t *sm, - vlib_buffer_t *b, - ip4_header_t *ip, - nat_6t_flow_t *f); +static_always_inline int +nat_6t_flow_icmp_translate (vlib_main_t *vm, snat_main_t *sm, vlib_buffer_t *b, + ip4_header_t *ip, nat_6t_flow_t *f); static_always_inline void nat_6t_flow_ip4_translate (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip, - nat_6t_flow_t *f, nat_protocol_t proto, - int is_icmp_inner_ip4) + nat_6t_flow_t *f, ip_protocol_t proto, + int is_icmp_inner_ip4, int skip_saddr_rewrite) { udp_header_t *udp = ip4_next_header (ip); tcp_header_t *tcp = (tcp_header_t *) udp; - if ((NAT_PROTOCOL_TCP == proto || NAT_PROTOCOL_UDP == proto) && + if ((IP_PROTOCOL_TCP == proto || IP_PROTOCOL_UDP == proto) && !vnet_buffer (b)->ip.reass.is_non_first_fragment) { if (!is_icmp_inner_ip4) @@ -3362,7 +3640,7 @@ nat_6t_flow_ip4_translate (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip, udp->dst_port = f->rewrite.sport; } - if (NAT_PROTOCOL_TCP == proto) + if (IP_PROTOCOL_TCP == proto) { ip_csum_t tcp_sum = tcp->checksum; tcp_sum = ip_csum_sub_even (tcp_sum, f->l3_csum_delta); @@ -3370,7 +3648,7 @@ nat_6t_flow_ip4_translate (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip, mss_clamping (sm->mss_clamping, tcp, &tcp_sum); tcp->checksum = ip_csum_fold (tcp_sum); } - else if (proto == NAT_PROTOCOL_UDP && udp->checksum) + else if (IP_PROTOCOL_UDP == proto && udp->checksum) { ip_csum_t udp_sum = udp->checksum; udp_sum = ip_csum_sub_even (udp_sum, f->l3_csum_delta); @@ -3382,7 +3660,10 @@ nat_6t_flow_ip4_translate (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip, { if (!is_icmp_inner_ip4) { // regular case - ip->src_address = f->rewrite.saddr; + if (!skip_saddr_rewrite) + { + ip->src_address = f->rewrite.saddr; + } ip->dst_address = f->rewrite.daddr; } else @@ -3392,14 +3673,32 @@ nat_6t_flow_ip4_translate (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip, } } - ip_csum_t ip_sum = ip->checksum; - ip_sum = ip_csum_sub_even (ip_sum, f->l3_csum_delta); - ip->checksum = ip_csum_fold (ip_sum); - ASSERT (ip->checksum == ip4_header_checksum (ip)); + if (skip_saddr_rewrite) + { + ip->checksum = ip4_header_checksum (ip); + } + else + { + ip_csum_t ip_sum = ip->checksum; + ip_sum = ip_csum_sub_even (ip_sum, f->l3_csum_delta); + ip->checksum = ip_csum_fold (ip_sum); + } + if (0xffff == ip->checksum) + ip->checksum = 0; + ASSERT (ip4_header_checksum_is_valid (ip)); +} + +static_always_inline int +it_fits (vlib_main_t *vm, vlib_buffer_t *b, void *object, size_t size) +{ + int result = ((u8 *) object + size <= + (u8 *) vlib_buffer_get_current (b) + b->current_length) && + vlib_object_within_buffer_data (vm, b, object, size); + return result; } static_always_inline int -nat_6t_flow_icmp_translate (snat_main_t *sm, vlib_buffer_t *b, +nat_6t_flow_icmp_translate (vlib_main_t *vm, snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip, nat_6t_flow_t *f) { if (IP_PROTOCOL_ICMP != ip->protocol) @@ -3410,8 +3709,10 @@ nat_6t_flow_icmp_translate (snat_main_t *sm, vlib_buffer_t *b, if ((!vnet_buffer (b)->ip.reass.is_non_first_fragment)) { - if (icmp->checksum == 0) - icmp->checksum = 0xffff; + if (!it_fits (vm, b, icmp, sizeof (*icmp))) + { + return NAT_ED_TRNSL_ERR_PACKET_TRUNCATED; + } if (!icmp_type_is_error_message (icmp->type)) { @@ -3428,32 +3729,88 @@ nat_6t_flow_icmp_translate (snat_main_t *sm, vlib_buffer_t *b, } else { + ip_csum_t sum = ip_incremental_checksum ( + 0, icmp, + clib_net_to_host_u16 (ip->length) - ip4_header_bytes (ip)); + sum = (u16) ~ip_csum_fold (sum); + if (sum != 0) + { + return NAT_ED_TRNSL_ERR_INVALID_CSUM; + } + // errors are not fragmented ip4_header_t *inner_ip = (ip4_header_t *) (echo + 1); if (!ip4_header_checksum_is_valid (inner_ip)) { - return NAT_ED_TRNSL_ERR_TRANSLATION_FAILED; + return NAT_ED_TRNSL_ERR_INNER_IP_CORRUPT; } - nat_protocol_t inner_proto = - ip_proto_to_nat_proto (inner_ip->protocol); + ip_protocol_t inner_proto = inner_ip->protocol; - ip_csum_t icmp_sum = icmp->checksum; + ip_csum_t old_icmp_sum = icmp->checksum; + ip_csum_t old_inner_ip_sum = inner_ip->checksum; + ip_csum_t old_udp_sum; + ip_csum_t old_tcp_sum; + ip_csum_t new_icmp_sum; + udp_header_t *udp; + tcp_header_t *tcp; switch (inner_proto) { - case NAT_PROTOCOL_UDP: - case NAT_PROTOCOL_TCP: + case IP_PROTOCOL_UDP: + udp = (udp_header_t *) (inner_ip + 1); + if (!it_fits (vm, b, udp, sizeof (*udp))) + { + return NAT_ED_TRNSL_ERR_PACKET_TRUNCATED; + } + old_udp_sum = udp->checksum; + nat_6t_flow_ip4_translate (sm, b, inner_ip, f, inner_proto, + 1 /* is_icmp_inner_ip4 */, + 0 /* skip_saddr_rewrite */); + new_icmp_sum = ip_csum_sub_even (old_icmp_sum, f->l3_csum_delta); + new_icmp_sum = ip_csum_sub_even (new_icmp_sum, f->l4_csum_delta); + new_icmp_sum = + ip_csum_update (new_icmp_sum, old_inner_ip_sum, + inner_ip->checksum, ip4_header_t, checksum); + new_icmp_sum = + ip_csum_update (new_icmp_sum, old_udp_sum, udp->checksum, + udp_header_t, checksum); + new_icmp_sum = ip_csum_fold (new_icmp_sum); + icmp->checksum = new_icmp_sum; + break; + case IP_PROTOCOL_TCP: + tcp = (tcp_header_t *) (inner_ip + 1); + if (!it_fits (vm, b, tcp, sizeof (*tcp))) + { + return NAT_ED_TRNSL_ERR_PACKET_TRUNCATED; + } + old_tcp_sum = tcp->checksum; nat_6t_flow_ip4_translate (sm, b, inner_ip, f, inner_proto, - 1 /* is_icmp_inner_ip4 */); - icmp_sum = ip_csum_sub_even (icmp_sum, f->l3_csum_delta); - icmp->checksum = ip_csum_fold (icmp_sum); + 1 /* is_icmp_inner_ip4 */, + 0 /* skip_saddr_rewrite */); + new_icmp_sum = ip_csum_sub_even (old_icmp_sum, f->l3_csum_delta); + new_icmp_sum = ip_csum_sub_even (new_icmp_sum, f->l4_csum_delta); + new_icmp_sum = + ip_csum_update (new_icmp_sum, old_inner_ip_sum, + inner_ip->checksum, ip4_header_t, checksum); + new_icmp_sum = + ip_csum_update (new_icmp_sum, old_tcp_sum, tcp->checksum, + tcp_header_t, checksum); + new_icmp_sum = ip_csum_fold (new_icmp_sum); + icmp->checksum = new_icmp_sum; break; - case NAT_PROTOCOL_ICMP: + case IP_PROTOCOL_ICMP: + nat_6t_flow_ip4_translate (sm, b, inner_ip, f, inner_proto, + 1 /* is_icmp_inner_ip4 */, + 0 /* skip_saddr_rewrite */); if (f->ops & NAT_FLOW_OP_ICMP_ID_REWRITE) { icmp46_header_t *inner_icmp = ip4_next_header (inner_ip); + if (!it_fits (vm, b, inner_icmp, sizeof (*inner_icmp))) + { + return NAT_ED_TRNSL_ERR_PACKET_TRUNCATED; + } icmp_echo_header_t *inner_echo = (icmp_echo_header_t *) (inner_icmp + 1); if (f->rewrite.icmp_id != inner_echo->identifier) @@ -3478,29 +3835,66 @@ nat_6t_flow_icmp_translate (snat_main_t *sm, vlib_buffer_t *b, } } } + return NAT_ED_TRNSL_ERR_SUCCESS; } -nat_translation_error_e -nat_6t_flow_buf_translate (snat_main_t *sm, vlib_buffer_t *b, ip4_header_t *ip, - nat_6t_flow_t *f, nat_protocol_t proto, - int is_output_feature) +static_always_inline nat_translation_error_e +nat_6t_flow_buf_translate (vlib_main_t *vm, snat_main_t *sm, vlib_buffer_t *b, + ip4_header_t *ip, nat_6t_flow_t *f, + ip_protocol_t proto, int is_output_feature, + int is_i2o) { if (!is_output_feature && f->ops & NAT_FLOW_OP_TXFIB_REWRITE) { vnet_buffer (b)->sw_if_index[VLIB_TX] = f->rewrite.fib_index; } - nat_6t_flow_ip4_translate (sm, b, ip, f, proto, 0 /* is_icmp_inner_ip4 */); - - if (NAT_PROTOCOL_ICMP == proto) + if (IP_PROTOCOL_ICMP == proto) { - return nat_6t_flow_icmp_translate (sm, b, ip, f); + if (ip->src_address.as_u32 != f->rewrite.saddr.as_u32) + { + // packet is returned from a router, not from destination + // skip source address rewrite if in o2i path + nat_6t_flow_ip4_translate (sm, b, ip, f, proto, + 0 /* is_icmp_inner_ip4 */, + !is_i2o /* skip_saddr_rewrite */); + } + else + { + nat_6t_flow_ip4_translate (sm, b, ip, f, proto, + 0 /* is_icmp_inner_ip4 */, + 0 /* skip_saddr_rewrite */); + } + return nat_6t_flow_icmp_translate (vm, sm, b, ip, f); } + nat_6t_flow_ip4_translate (sm, b, ip, f, proto, 0 /* is_icmp_inner_ip4 */, + 0 /* skip_saddr_rewrite */); + return NAT_ED_TRNSL_ERR_SUCCESS; } +nat_translation_error_e +nat_6t_flow_buf_translate_i2o (vlib_main_t *vm, snat_main_t *sm, + vlib_buffer_t *b, ip4_header_t *ip, + nat_6t_flow_t *f, ip_protocol_t proto, + int is_output_feature) +{ + return nat_6t_flow_buf_translate (vm, sm, b, ip, f, proto, is_output_feature, + 1 /* is_i2o */); +} + +nat_translation_error_e +nat_6t_flow_buf_translate_o2i (vlib_main_t *vm, snat_main_t *sm, + vlib_buffer_t *b, ip4_header_t *ip, + nat_6t_flow_t *f, ip_protocol_t proto, + int is_output_feature) +{ + return nat_6t_flow_buf_translate (vm, sm, b, ip, f, proto, is_output_feature, + 0 /* is_i2o */); +} + u8 * format_nat_6t (u8 *s, va_list *args) { @@ -3530,6 +3924,15 @@ format_nat_ed_translation_error (u8 *s, va_list *args) case NAT_ED_TRNSL_ERR_FLOW_MISMATCH: s = format (s, "flow-mismatch"); break; + case NAT_ED_TRNSL_ERR_PACKET_TRUNCATED: + s = format (s, "packet-truncated"); + break; + case NAT_ED_TRNSL_ERR_INNER_IP_CORRUPT: + s = format (s, "inner-ip-corrupted"); + break; + case NAT_ED_TRNSL_ERR_INVALID_CSUM: + s = format (s, "invalid-checksum"); + break; } return s; } @@ -3595,6 +3998,126 @@ format_nat_6t_flow (u8 *s, va_list *args) return s; } +static inline void +nat_syslog_nat44_sess (u32 ssubix, u32 sfibix, ip4_address_t *isaddr, + u16 isport, ip4_address_t *xsaddr, u16 xsport, + ip4_address_t *idaddr, u16 idport, + ip4_address_t *xdaddr, u16 xdport, u8 proto, u8 is_add, + u8 is_twicenat) +{ + syslog_msg_t syslog_msg; + fib_table_t *fib; + + if (!syslog_is_enabled ()) + return; + + if (syslog_severity_filter_block (SADD_SDEL_SEVERITY)) + return; + + fib = fib_table_get (sfibix, FIB_PROTOCOL_IP4); + + syslog_msg_init (&syslog_msg, NAT_FACILITY, SADD_SDEL_SEVERITY, NAT_APPNAME, + is_add ? SADD_MSGID : SDEL_MSGID); + + syslog_msg_sd_init (&syslog_msg, NSESS_SDID); + syslog_msg_add_sd_param (&syslog_msg, SSUBIX_SDPARAM_NAME, "%d", ssubix); + syslog_msg_add_sd_param (&syslog_msg, SVLAN_SDPARAM_NAME, "%d", + fib->ft_table_id); + syslog_msg_add_sd_param (&syslog_msg, IATYP_SDPARAM_NAME, IATYP_IPV4); + syslog_msg_add_sd_param (&syslog_msg, ISADDR_SDPARAM_NAME, "%U", + format_ip4_address, isaddr); + syslog_msg_add_sd_param (&syslog_msg, ISPORT_SDPARAM_NAME, "%d", + clib_net_to_host_u16 (isport)); + syslog_msg_add_sd_param (&syslog_msg, XATYP_SDPARAM_NAME, IATYP_IPV4); + syslog_msg_add_sd_param (&syslog_msg, XSADDR_SDPARAM_NAME, "%U", + format_ip4_address, xsaddr); + syslog_msg_add_sd_param (&syslog_msg, XSPORT_SDPARAM_NAME, "%d", + clib_net_to_host_u16 (xsport)); + syslog_msg_add_sd_param (&syslog_msg, PROTO_SDPARAM_NAME, "%d", proto); + syslog_msg_add_sd_param (&syslog_msg, XDADDR_SDPARAM_NAME, "%U", + format_ip4_address, xdaddr); + syslog_msg_add_sd_param (&syslog_msg, XDPORT_SDPARAM_NAME, "%d", + clib_net_to_host_u16 (xdport)); + if (is_twicenat) + { + syslog_msg_add_sd_param (&syslog_msg, IDADDR_SDPARAM_NAME, "%U", + format_ip4_address, idaddr); + syslog_msg_add_sd_param (&syslog_msg, IDPORT_SDPARAM_NAME, "%d", + clib_net_to_host_u16 (idport)); + } + + syslog_msg_send (&syslog_msg); +} + +void +nat_syslog_nat44_sadd (u32 ssubix, u32 sfibix, ip4_address_t *isaddr, + u16 isport, ip4_address_t *idaddr, u16 idport, + ip4_address_t *xsaddr, u16 xsport, + ip4_address_t *xdaddr, u16 xdport, u8 proto, + u8 is_twicenat) +{ + nat_syslog_nat44_sess (ssubix, sfibix, isaddr, isport, xsaddr, xsport, + idaddr, idport, xdaddr, xdport, proto, 1, + is_twicenat); +} + +void +nat_syslog_nat44_sdel (u32 ssubix, u32 sfibix, ip4_address_t *isaddr, + u16 isport, ip4_address_t *idaddr, u16 idport, + ip4_address_t *xsaddr, u16 xsport, + ip4_address_t *xdaddr, u16 xdport, u8 proto, + u8 is_twicenat) +{ + nat_syslog_nat44_sess (ssubix, sfibix, isaddr, isport, xsaddr, xsport, + idaddr, idport, xdaddr, xdport, proto, 0, + is_twicenat); +} + +u8 * +format_nat44_ed_tcp_state (u8 *s, va_list *args) +{ + nat44_ed_tcp_state_e e = va_arg (*args, nat44_ed_tcp_state_e); + switch (e) + { + case NAT44_ED_TCP_STATE_CLOSED: + s = format (s, "closed"); + break; + case NAT44_ED_TCP_STATE_SYN_I2O: + s = format (s, "SYN seen in in2out direction"); + break; + case NAT44_ED_TCP_STATE_SYN_O2I: + s = format (s, "SYN seen in out2in direction"); + break; + case NAT44_ED_TCP_STATE_ESTABLISHED: + s = format (s, "SYN seen in both directions/established"); + break; + case NAT44_ED_TCP_STATE_FIN_I2O: + s = format (s, "FIN seen in in2out direction"); + break; + case NAT44_ED_TCP_STATE_FIN_O2I: + s = format (s, "FIN seen in out2in direction"); + break; + case NAT44_ED_TCP_STATE_RST_TRANS: + s = format (s, "RST seen/transitory timeout"); + break; + case NAT44_ED_TCP_STATE_FIN_TRANS: + s = format (s, "FIN seen in both directions/transitory timeout"); + break; + case NAT44_ED_TCP_STATE_FIN_REOPEN_SYN_O2I: + s = format (s, "FIN seen in both directions/transitory timeout/session " + "reopening in out2in direction"); + break; + case NAT44_ED_TCP_STATE_FIN_REOPEN_SYN_I2O: + s = format (s, "FIN seen in both directions/transitory timeout/session " + "reopening in in2out direction"); + break; + case NAT44_ED_TCP_N_STATE: + s = format (s, "BUG! unexpected N_STATE! BUG!"); + break; + } + return s; +} + /* * fd.io coding-style-patch-verification: ON *