X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;ds=sidebyside;f=src%2Fplugins%2Fnat%2Fnat44-ed%2Fnat44_ed.c;h=a11043682b959db764779d1dd7ef5377407564b8;hb=23a15b34e410def81d4bb3e2c8f28f118b59dc5a;hp=fcc3e6bf0b51c2905aec25ea4edc99a0c36bf3b7;hpb=5599fc2dae024bcf150fa4b3b4584e19419f8079;p=vpp.git diff --git a/src/plugins/nat/nat44-ed/nat44_ed.c b/src/plugins/nat/nat44-ed/nat44_ed.c index fcc3e6bf0b5..a11043682b9 100644 --- a/src/plugins/nat/nat44-ed/nat44_ed.c +++ b/src/plugins/nat/nat44-ed/nat44_ed.c @@ -36,6 +36,8 @@ #include #include +#include + snat_main_t snat_main; static_always_inline void nat_validate_interface_counters (snat_main_t *sm, @@ -74,7 +76,6 @@ 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 +149,14 @@ 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", @@ -172,20 +175,11 @@ 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 (ip4_header_t * ip, u32 rx_fib_index, - u8 is_output); - u32 nat_calc_bihash_buckets (u32 n_elts); u8 * @@ -245,58 +239,76 @@ nat_free_session_data (snat_main_t * sm, snat_session_t * s, u32 thread_index, 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)) - { - return; - } + 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->nat_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)); + nat44_ed_is_twice_nat_session (s)); - if (snat_is_unk_proto_session (s)) - return; + if (snat_is_unk_proto_session (s)) + return; - 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); - } + 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); - } + if (nat44_ed_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); + } - if (snat_is_session_static (s)) - return; + if (nat44_ed_is_session_static (s)) + return; - snat_free_outside_address_and_port (sm->addresses, thread_index, - &s->out2in.addr, s->out2in.port, - s->nat_proto); + 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 int +is_snat_address_used_in_static_mapping (snat_main_t *sm, ip4_address_t addr) +{ + snat_static_mapping_t *m; + pool_foreach (m, sm->static_mappings) + { + if (is_sm_addr_only (m->flags) || is_sm_out2in_only (m->flags) || + is_sm_identity_nat (m->flags)) + { + continue; + } + if (m->external_addr.as_u32 == addr.as_u32) + { + return 1; + } + } + return 0; +} + +static void +nat44_ed_add_del_addr_to_fib (ip4_address_t *addr, u8 p_len, u32 sw_if_index, + int is_add) { + // 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; fib_prefix_t prefix = { .fp_len = p_len, @@ -308,31 +320,86 @@ snat_add_del_addr_to_fib (ip4_address_t * addr, u8 p_len, u32 sw_if_index, 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); + { + 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); + { + fib_table_entry_delete (fib_index, &prefix, sm->fib_src_low); + } } -int -snat_add_address (snat_main_t * sm, ip4_address_t * addr, u32 vrf_id, - u8 twice_nat) +static void +nat44_ed_add_del_addr_to_fib_foreach_out_if (ip4_address_t *addr, u8 is_add) { - snat_address_t *ap; + snat_main_t *sm = &snat_main; snat_interface_t *i; + + pool_foreach (i, sm->interfaces) + { + if (nat44_ed_is_interface_outside (i)) + { + nat44_ed_add_del_addr_to_fib (addr, 32, i->sw_if_index, is_add); + } + } + pool_foreach (i, sm->output_feature_interfaces) + { + if (nat44_ed_is_interface_outside (i)) + { + nat44_ed_add_del_addr_to_fib (addr, 32, i->sw_if_index, is_add); + } + } +} + +static_always_inline void +nat44_ed_add_del_addr_to_fib_foreach_addr (u32 sw_if_index, u8 is_add) +{ + snat_main_t *sm = &snat_main; + snat_address_t *ap; + + vec_foreach (ap, sm->addresses) + { + nat44_ed_add_del_addr_to_fib (&ap->addr, 32, sw_if_index, is_add); + } +} + +static_always_inline void +nat44_ed_add_del_addr_to_fib_foreach_addr_only_sm (u32 sw_if_index, u8 is_add) +{ + snat_main_t *sm = &snat_main; + snat_static_mapping_t *m; + + pool_foreach (m, sm->static_mappings) + { + if (is_sm_addr_only (m->flags) && !is_sm_identity_nat (m->flags)) + { + nat44_ed_add_del_addr_to_fib (&m->external_addr, 32, sw_if_index, + is_add); + } + } +} + +int +nat44_ed_add_address (ip4_address_t *addr, u32 vrf_id, u8 twice_nat) +{ + snat_main_t *sm = &snat_main; vlib_thread_main_t *tm = vlib_get_thread_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 */ - /* *INDENT-OFF* */ - vec_foreach (ap, twice_nat ? sm->twice_nat_addresses : sm->addresses) + // check if address already exists + vec_foreach (ap, addresses) { if (ap->addr.as_u32 == addr->as_u32) { @@ -340,100 +407,133 @@ snat_add_address (snat_main_t * sm, ip4_address_t * addr, u32 vrf_id, return VNET_API_ERROR_VALUE_EXIST; } } - /* *INDENT-ON* */ if (twice_nat) - vec_add2 (sm->twice_nat_addresses, ap, 1); + { + vec_add2 (sm->twice_nat_addresses, ap, 1); + } else - vec_add2 (sm->addresses, ap, 1); + { + vec_add2 (sm->addresses, ap, 1); + } + 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); - 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 (twice_nat) - return 0; - /* Add external address to FIB */ - /* *INDENT-OFF* */ - pool_foreach (i, sm->interfaces) - { - if (nat_interface_is_inside (i)) - continue; + if (vrf_id != ~0) + { + ap->fib_index = fib_table_find_or_create_and_lock ( + FIB_PROTOCOL_IP4, vrf_id, sm->fib_src_low); + } - 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; +#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 _ - snat_add_del_addr_to_fib (addr, 32, i->sw_if_index, 1); - break; + if (!twice_nat) + { + // if we don't have enabled interface we don't add address + // to fib + nat44_ed_add_del_addr_to_fib_foreach_out_if (addr, 1); } - /* *INDENT-ON* */ - return 0; } -static int -is_snat_address_used_in_static_mapping (snat_main_t * sm, ip4_address_t addr) +int +nat44_ed_del_address (ip4_address_t addr, u8 delete_sm, 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; 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* */ + int j; - return 0; -} + addresses = twice_nat ? sm->twice_nat_addresses : sm->addresses; -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; + 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; + } - 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; + if (delete_sm) + { + pool_foreach (m, sm->static_mappings) + { + if (m->external_addr.as_u32 == addr.as_u32) + { + nat44_ed_del_static_mapping (m->local_addr, m->external_addr, + m->local_port, m->external_port, + m->proto, m->vrf_id, ~0, m->flags); + } + } + } + else + { + // TODO: why ? + // 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->addresses, j); + nat44_ed_add_del_addr_to_fib_foreach_out_if (&addr, 0); + } + else { vec_del1 (sm->twice_nat_addresses, j); } + return 0; } u32 @@ -461,7 +561,6 @@ nat_ed_static_mapping_del_sessions (snat_main_t * sm, { 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) @@ -477,16 +576,15 @@ nat_ed_static_mapping_del_sessions (snat_main_t * sm, continue; } - if (is_lb_session (s)) + if (nat44_ed_is_lb_session (s)) continue; - if (!snat_is_session_static (s)) + if (!nat44_ed_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) { @@ -497,618 +595,811 @@ nat_ed_static_mapping_del_sessions (snat_main_t * sm, } 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) +nat44_ed_reserve_port (ip4_address_t addr, u16 port, nat_protocol_t proto) { + u32 ti = get_thread_idx_by_port (port); 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; int i; - /* If the external address is a specific interface address */ - if (sw_if_index != ~0) + for (i = 0; i < vec_len (sm->addresses); i++) { - ip4_address_t *first_int_addr; - - for (i = 0; i < vec_len (sm->to_resolve); i++) - { - 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; + a = sm->addresses + i; - if (!addr_only) - { - if ((rp->l_port != l_port && rp->e_port != e_port) - || rp->proto != proto) - continue; - } + if (a->addr.as_u32 != addr.as_u32) + continue; - rp_match = rp; - break; + switch (proto) + { +#define _(N, j, n, s) \ + case NAT_PROTOCOL_##N: \ + if (a->busy_##n##_port_refcounts[port]) \ + goto done; \ + ++a->busy_##n##_port_refcounts[port]; \ + if (port > 1024) \ + { \ + a->busy_##n##_ports++; \ + a->busy_##n##_ports_per_thread[ti]++; \ + } \ + break; + foreach_nat_protocol +#undef _ + default : nat_elog_info (sm, "unknown protocol"); + goto done; } - /* Might be already set... */ - first_int_addr = ip4_interface_first_address - (sm->ip4_main, sw_if_index, 0 /* just want the address */ ); + return 0; + } - if (is_add) - { - if (rp_match) - return VNET_API_ERROR_VALUE_EXIST; +done: + return 1; +} - 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); +int +nat44_ed_free_port (ip4_address_t addr, u16 port, nat_protocol_t proto) +{ + u32 ti = get_thread_idx_by_port (port); + snat_main_t *sm = &snat_main; + snat_address_t *a = 0; + int i; - /* DHCP resolution required? */ - if (first_int_addr == 0) - { - return 0; - } - 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; - } - } - else - { - if (!rp_match) - return VNET_API_ERROR_NO_SUCH_ENTRY; + for (i = 0; i < vec_len (sm->addresses); i++) + { + a = sm->addresses + i; - vec_del1 (sm->to_resolve, i); + if (a->addr.as_u32 != addr.as_u32) + continue; - if (first_int_addr) - { - 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; - } - else - return 0; + switch (proto) + { +#define _(N, j, n, s) \ + case NAT_PROTOCOL_##N: \ + --a->busy_##n##_port_refcounts[port]; \ + if (port > 1024) \ + { \ + a->busy_##n##_ports--; \ + a->busy_##n##_ports_per_thread[ti]--; \ + } \ + break; + foreach_nat_protocol +#undef _ + default : nat_elog_info (sm, "unknown protocol"); + goto done; } + + return 0; } - 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); +done: + return 1; +} - if (is_add) - { - if (m) - { - 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; - } +void +nat44_ed_add_resolve_record (ip4_address_t l_addr, u16 l_port, u16 e_port, + nat_protocol_t proto, u32 vrf_id, u32 sw_if_index, + u32 flags, ip4_address_t pool_addr, u8 *tag) +{ + snat_static_map_resolve_t *rp; + snat_main_t *sm = &snat_main; - if (twice_nat && addr_only) - return VNET_API_ERROR_UNSUPPORTED; + vec_add2 (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); +} - /* 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); - } +int +nat44_ed_get_resolve_record (ip4_address_t l_addr, u16 l_port, u16 e_port, + nat_protocol_t proto, u32 vrf_id, u32 sw_if_index, + u32 flags, int *out) +{ + snat_static_map_resolve_t *rp; + snat_main_t *sm = &snat_main; + int i; - if (!(out2in_only || identity_nat)) - { - 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; - } + for (i = 0; i < vec_len (sm->to_resolve); i++) + { + rp = sm->to_resolve + i; - /* 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)) + if (rp->sw_if_index == sw_if_index && rp->vrf_id == vrf_id) { - for (i = 0; i < vec_len (sm->addresses); i++) + if (is_sm_identity_nat (rp->flags) && is_sm_identity_nat (flags)) { - if (sm->addresses[i].addr.as_u32 == e_addr.as_u32) + if (!(is_sm_addr_only (rp->flags) && is_sm_addr_only (flags))) { - a = sm->addresses + i; - /* External port must be unused */ - switch (proto) + if (rp->e_port != e_port || rp->proto != 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; + continue; } - break; } } - /* External address must be allocated */ - if (!a && (l_addr.as_u32 != e_addr.as_u32)) + else if (rp->l_addr.as_u32 == l_addr.as_u32) { - if (sw_if_index != ~0) + if (!(is_sm_addr_only (rp->flags) && is_sm_addr_only (flags))) { - for (i = 0; i < vec_len (sm->to_resolve); i++) + if (rp->l_port != l_port || rp->e_port != e_port || + rp->proto != proto) { - 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; + continue; } } - return VNET_API_ERROR_NO_SUCH_ENTRY; } + else + { + continue; + } + if (out) + { + *out = i; + } + return 0; } + } + return 1; +} + +int +nat44_ed_del_resolve_record (ip4_address_t l_addr, u16 l_port, u16 e_port, + nat_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->to_resolve, i); + return 0; + } + return 1; +} - 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_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 (twice_nat == TWICE_NAT && exact) + 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, nat_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; + clib_bihash_kv_8_8_t kv, value; + nat44_lb_addr_port_t *local; + snat_static_mapping_t *m; + u32 fib_index = ~0; + int rv; - 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) + if (!sm->enabled) + { + return VNET_API_ERROR_UNSUPPORTED; + } + + rv = nat44_ed_validate_sm_input (flags); + if (rv != 0) + { + return rv; + } + + if (is_sm_addr_only (flags)) + { + e_port = l_port = proto = 0; + } + + if (is_sm_switch_address (flags)) + { + // this mapping is interface bound + ip4_address_t *first_int_addr; + + // check if this record isn't registered for resolve + 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 + // register record for resolve + nat44_ed_add_resolve_record (l_addr, l_port, e_port, proto, vrf_id, + sw_if_index, flags, pool_addr, tag); + + 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; + // dhcp resolution required + return 0; } - if (!addr_only) + + e_addr.as_u32 = first_int_addr->as_u32; + } + + if (is_sm_identity_nat (flags)) + { + l_port = e_port; + l_addr.as_u32 = e_addr.as_u32; + } + + // fib index 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 = pool_elt_at_index (sm->static_mappings, value.value); + if (!is_sm_identity_nat (m->flags)) { - m->local_port = l_port; - m->external_port = e_port; - m->proto = proto; + return VNET_API_ERROR_VALUE_EXIST; } - if (sm->num_workers > 1) + // case: + // adding local identity nat record for different vrf table + pool_foreach (local, m->locals) { - ip4_header_t ip = { - .src_address = m->local_addr, - }; - vec_add1 (m->workers, sm->worker_in2out_cb (&ip, m->fib_index, 0)); - tsm = vec_elt_at_index (sm->per_thread_data, m->workers[0]); + if (local->vrf_id == vrf_id) + { + return VNET_API_ERROR_VALUE_EXIST; + } } - else - tsm = vec_elt_at_index (sm->per_thread_data, sm->num_workers); - if (!out2in_only) + 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; + } + + 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))) + { + init_nat_k (&kv, l_addr, l_port, fib_index, proto); + if (!clib_bihash_search_8_8 (&sm->static_mapping_by_local, &kv, &value)) { - 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); + if (!(is_sm_out2in_only (flags) || is_sm_addr_only (flags) || + sm->static_mapping_only)) + { + if (nat44_ed_reserve_port (e_addr, e_port, proto)) + { + // remove resolve record + if (is_sm_switch_address (flags) && !is_sm_identity_nat (flags)) + { + nat44_ed_del_resolve_record (l_addr, l_port, e_port, proto, + vrf_id, sw_if_index, flags); + } + return VNET_API_ERROR_NO_SUCH_ENTRY; + } + } + + 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->tag = vec_dup (tag); + + if (is_sm_exact_address (flags) && is_sm_twice_nat (flags)) + { + m->pool_addr = pool_addr; + } + + 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 { - if (!m) + m->vrf_id = vrf_id; + m->fib_index = fib_index; + + // not identity && addr only + if (is_sm_addr_only (flags)) { - if (sw_if_index != ~0) - return 0; - else - return VNET_API_ERROR_NO_SUCH_ENTRY; + nat44_ed_add_del_addr_to_fib_foreach_out_if (&e_addr, 1); + } + } + + if (!is_sm_out2in_only (flags)) + { + 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); + } + + 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); + + 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); + } + + return 0; +} + +int +nat44_ed_del_static_mapping (ip4_address_t l_addr, ip4_address_t e_addr, + u16 l_port, u16 e_port, nat_protocol_t proto, + u32 vrf_id, u32 sw_if_index, u32 flags) +{ + snat_main_per_thread_data_t *tsm; + snat_main_t *sm = &snat_main; + + clib_bihash_kv_8_8_t kv, value; + nat44_lb_addr_port_t *local; + snat_static_mapping_t *m; + u32 fib_index = ~0; + int rv; + + if (!sm->enabled) + { + return VNET_API_ERROR_UNSUPPORTED; + } + + rv = nat44_ed_validate_sm_input (flags); + if (rv != 0) + { + return rv; + } + + if (is_sm_addr_only (flags)) + { + e_port = l_port = proto = 0; + } + + if (is_sm_switch_address (flags)) + { + // this mapping is interface bound + ip4_address_t *first_int_addr; + + // delete record registered for resolve + if (nat44_ed_del_resolve_record (l_addr, l_port, e_port, proto, vrf_id, + sw_if_index, flags)) + { + return VNET_API_ERROR_NO_SUCH_ENTRY; } - if (identity_nat) + first_int_addr = + ip4_interface_first_address (sm->ip4_main, sw_if_index, 0); + if (!first_int_addr) { - if (vrf_id == ~0) - vrf_id = sm->inside_vrf_id; + // dhcp resolution required + return 0; + } - /* *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; + e_addr.as_u32 = first_int_addr->as_u32; + } + + if (is_sm_identity_nat (flags)) + { + l_port = e_port; + l_addr.as_u32 = e_addr.as_u32; + } + + // fib index 0 + init_nat_k (&kv, e_addr, e_port, 0, proto); - local = pool_elt_at_index (m->locals, find); - fib_index = local->fib_index; - pool_put (m->locals, local); + if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) + { + if (is_sm_switch_address (flags)) + { + return 0; } - else - fib_index = m->fib_index; + return VNET_API_ERROR_NO_SUCH_ENTRY; + } + + m = pool_elt_at_index (sm->static_mappings, value.value); - /* Free external address port */ - if (!(addr_only || sm->static_mapping_only || out2in_only)) + if (is_sm_identity_nat (flags)) + { + u8 failure = 1; + + if (!is_sm_switch_address (flags)) { - for (i = 0; i < vec_len (sm->addresses); i++) + vrf_id = sm->inside_vrf_id; + } + + pool_foreach (local, m->locals) + { + 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); + failure = 0; } } + if (failure) + { + return VNET_API_ERROR_NO_SUCH_ENTRY; + } + } + else + { + fib_index = m->fib_index; + } + + if (!(is_sm_out2in_only (flags) || is_sm_addr_only (flags) || + sm->static_mapping_only)) + { + if (nat44_ed_free_port (e_addr, e_port, proto)) + { + return VNET_API_ERROR_INVALID_VALUE; + } + } + + if (!is_sm_out2in_only (flags)) + { + init_nat_k (&kv, l_addr, l_port, fib_index, proto); + clib_bihash_add_del_8_8 (&sm->static_mapping_by_local, &kv, 0); + } + + if (!sm->static_mapping_only || sm->static_mapping_connection_tracking) + { + // 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); - 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)) - { - nat_ed_static_mapping_del_sessions ( - sm, tsm, m->local_addr, m->local_port, m->proto, fib_index, - addr_only, e_addr, e_port); - } + 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); + } - fib_table_unlock (fib_index, FIB_PROTOCOL_IP4, sm->fib_src_low); - if (pool_elts (m->locals)) - return 0; + fib_table_unlock (fib_index, FIB_PROTOCOL_IP4, sm->fib_src_low); - init_nat_k (&kv, m->external_addr, m->external_port, 0, m->proto); + if (!pool_elts (m->locals)) + { + // this is last record remove all required stuff + // fib_index 0 + init_nat_k (&kv, e_addr, e_port, 0, proto); clib_bihash_add_del_8_8 (&sm->static_mapping_by_external, &kv, 0); vec_free (m->tag); vec_free (m->workers); - /* Delete static mapping from pool */ pool_put (sm->static_mappings, m); - } - - if (!addr_only || (l_addr.as_u32 == e_addr.as_u32)) - return 0; - - /* Add/delete external address to FIB */ - /* *INDENT-OFF* */ - pool_foreach (interface, sm->interfaces) - { - if (nat_interface_is_inside (interface)) - continue; - - 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; - snat_add_del_addr_to_fib (&e_addr, 32, interface->sw_if_index, is_add); - break; - } - /* *INDENT-ON* */ + if (is_sm_addr_only (flags) && !is_sm_identity_nat (flags)) + { + nat44_ed_add_del_addr_to_fib_foreach_out_if (&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, + nat_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 i; + + if (!sm->enabled) + { + return VNET_API_ERROR_UNSUPPORTED; + } + 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; + { + m = 0; + } else - m = pool_elt_at_index (sm->static_mappings, value.value); + { + m = pool_elt_at_index (sm->static_mappings, value.value); + } - if (is_add) + if (m) { - if (m) - return VNET_API_ERROR_VALUE_EXIST; + return VNET_API_ERROR_VALUE_EXIST; + } - if (vec_len (locals) < 2) - return VNET_API_ERROR_INVALID_VALUE; + if (vec_len (locals) < 2) + { + return VNET_API_ERROR_INVALID_VALUE; + } + if (!(sm->static_mapping_only || 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) + a = sm->addresses + i; + /* External port must be unused */ + switch (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 +#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; + default : nat_elog_info (sm, "unknown protocol"); + return VNET_API_ERROR_INVALID_VALUE_2; } + break; } - /* External address must be allocated */ - if (!a) - return VNET_API_ERROR_NO_SUCH_ENTRY; } + // 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; + 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; - 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)) + 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; + + 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)) + { + nat_elog_err (sm, "static_mapping_by_external key add failed"); + return VNET_API_ERROR_UNSPECIFIED; + } + + 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)) { - nat_elog_err (sm, "static_mapping_by_external key add failed"); - return VNET_API_ERROR_UNSPECIFIED; + 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); } - - for (i = 0; i < vec_len (locals); i++) + 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) { - 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) - { - ip4_header_t ip = { - .src_address = locals[i].addr, - }; - bitmap = - clib_bitmap_set (bitmap, - sm->worker_in2out_cb (&ip, m->fib_index, 0), - 1); - } + 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); } + } - /* Assign workers */ - if (sm->num_workers > 1) + /* Assign workers */ + if (sm->num_workers > 1) + { + clib_bitmap_foreach (i, bitmap) { - /* *INDENT-OFF* */ - clib_bitmap_foreach (i, bitmap) - { - vec_add1(m->workers, i); - } - /* *INDENT-ON* */ + vec_add1 (m->workers, i); } } - else + + return 0; +} + +int +nat44_ed_del_lb_static_mapping (ip4_address_t e_addr, u16 e_port, + nat_protocol_t proto, u32 flags) +{ + snat_main_t *sm = &snat_main; + snat_static_mapping_t *m; + clib_bihash_kv_8_8_t kv, value; + snat_address_t *a = 0; + + nat44_lb_addr_port_t *local; + snat_main_per_thread_data_t *tsm; + snat_session_t *s; + int i; + + if (!sm->enabled) { - if (!m) - return VNET_API_ERROR_NO_SUCH_ENTRY; + return VNET_API_ERROR_UNSUPPORTED; + } + + 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); - if (!is_lb_static_mapping (m)) - return VNET_API_ERROR_INVALID_VALUE; + if (!m) + return VNET_API_ERROR_NO_SUCH_ENTRY; - /* Free external address port */ - if (!(sm->static_mapping_only || out2in_only)) + if (!is_sm_lb (m->flags)) + return VNET_API_ERROR_INVALID_VALUE; + + if (!(sm->static_mapping_only || is_sm_out2in_only (flags))) + { + 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) + a = sm->addresses + i; + switch (proto) { - 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 +#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; + default : nat_elog_info (sm, "unknown protocol"); + return VNET_API_ERROR_INVALID_VALUE_2; } + break; } } + } - 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)) - { - nat_elog_err (sm, "static_mapping_by_external key del failed"); - return VNET_API_ERROR_UNSPECIFIED; - } - - /* *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; - } - } + 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)) + { + nat_elog_err (sm, "static_mapping_by_external key del failed"); + return VNET_API_ERROR_UNSPECIFIED; + } - if (sm->num_workers > 1) + pool_foreach (local, m->locals) + { + fib_table_unlock (local->fib_index, FIB_PROTOCOL_IP4, sm->fib_src_low); + if (!is_sm_out2in_only (flags)) + { + 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)) { - ip4_header_t ip = { - .src_address = local->addr, - }; - tsm = - vec_elt_at_index (sm->per_thread_data, - sm->worker_in2out_cb (&ip, m->fib_index, 0)); + nat_elog_err (sm, "static_mapping_by_local key del failed"); + return VNET_API_ERROR_UNSPECIFIED; } - 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; + if (sm->num_workers > 1) + { + 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); + + /* 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); + nat_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, + nat_protocol_t proto, u32 vrf_id, + u8 probability, u8 is_add) { snat_main_t *sm = &snat_main; snat_static_mapping_t *m = 0; @@ -1120,17 +1411,25 @@ nat44_lb_static_mapping_add_del_local (ip4_address_t e_addr, u16 e_port, uword *bitmap = 0; int i; + if (!sm->enabled) + { + return VNET_API_ERROR_UNSUPPORTED; + } + 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 (!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 +1439,13 @@ 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)); @@ -1157,7 +1457,7 @@ 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); @@ -1176,7 +1476,7 @@ 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)) @@ -1188,47 +1488,43 @@ 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 (&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); + 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* */ pool_put (m->locals, match_local); } vec_free (m->workers); - /* *INDENT-OFF* */ pool_foreach (local, m->locals) { vec_add1 (locals, local - m->locals); if (sm->num_workers > 1) { ip4_header_t ip; - ip.src_address.as_u32 = local->addr.as_u32, - bitmap = clib_bitmap_set (bitmap, - sm->worker_in2out_cb (&ip, local->fib_index, 0), - 1); + ip.src_address.as_u32 = local->addr.as_u32, + bitmap = clib_bitmap_set ( + bitmap, + nat44_ed_get_in2out_worker_index (0, &ip, local->fib_index, 0), 1); } } - /* *INDENT-ON* */ ASSERT (vec_len (locals) > 1); @@ -1244,202 +1540,319 @@ 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) +void +expire_per_vrf_sessions (u32 fib_index) { - snat_address_t *a = 0; - snat_session_t *ses; - u32 *ses_to_be_removed = 0, *ses_index; + per_vrf_sessions_t *per_vrf_sessions; 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; + snat_main_t *sm = &snat_main; + + vec_foreach (tsm, sm->per_thread_data) + { + vec_foreach (per_vrf_sessions, tsm->per_vrf_sessions_vec) + { + if ((per_vrf_sessions->rx_fib_index == fib_index) || + (per_vrf_sessions->tx_fib_index == fib_index)) + { + per_vrf_sessions->expired = 1; + } + } + } +} + +void +update_per_vrf_sessions_vec (u32 fib_index, int is_del) +{ + snat_main_t *sm = &snat_main; + nat_fib_t *fib; + + // we don't care if it is outside/inside fib + // we just care about their ref_count + // if it reaches 0 sessions should expire + // because the fib isn't valid for NAT anymore + + vec_foreach (fib, sm->fibs) + { + if (fib->fib_index == fib_index) + { + if (is_del) + { + fib->ref_count--; + if (!fib->ref_count) + { + vec_del1 (sm->fibs, fib - sm->fibs); + expire_per_vrf_sessions (fib_index); + } + return; + } + else + fib->ref_count++; + } + } + if (!is_del) + { + vec_add2 (sm->fibs, fib, 1); + fib->ref_count = 1; + fib->fib_index = fib_index; + } +} - /* Find SNAT address */ - for (i = 0; i < vec_len (addresses); i++) +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 (addresses[i].addr.as_u32 == addr.as_u32) + if (f->fib_index == fib_index) { - a = addresses + i; - break; + return f; } } - if (!a) + 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) { - nat_log_err ("no such address"); - return VNET_API_ERROR_NO_SUCH_ENTRY; + if (i->sw_if_index == sw_if_index) + { + return i; + } } + return 0; +} - if (delete_sm) +int +nat44_ed_add_interface (u32 sw_if_index, u8 is_inside) +{ + const char *del_feature_name, *feature_name; + snat_main_t *sm = &snat_main; + + nat_outside_fib_t *outside_fib; + snat_interface_t *i; + u32 fib_index; + int rv; + + if (!sm->enabled) { - 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* */ + nat_log_err ("nat44 is disabled"); + return VNET_API_ERROR_UNSUPPORTED; } - else + + if (nat44_ed_get_interface (sm->output_feature_interfaces, sw_if_index)) { - /* Check if address is used in some static mapping */ - if (is_snat_address_used_in_static_mapping (sm, addr)) + nat_log_err ("error interface already configured"); + return VNET_API_ERROR_VALUE_EXIST; + } + + 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)) { - nat_log_err ("address used in static mapping"); - return VNET_API_ERROR_UNSPECIFIED; + return 0; } - } + 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"; - if (a->fib_index != ~0) - fib_table_unlock (a->fib_index, FIB_PROTOCOL_IP4, sm->fib_src_low); + feature_name = "nat44-ed-classify"; + } - /* Delete sessions using address */ - if (a->busy_tcp_ports || a->busy_udp_ports || a->busy_icmp_ports) + 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 { - 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); - } - } + 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"; + } - 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); - } + 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); - vec_free (ses_to_be_removed); - } + pool_get (sm->interfaces, i); + i->sw_if_index = sw_if_index; + i->flags = 0; } -#define _(N, i, n, s) \ - vec_free (a->busy_##n##_ports_per_thread); - foreach_nat_protocol -#undef _ + fib_index = + fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index); - if (twice_nat) - { - vec_del1 (sm->twice_nat_addresses, i); - return 0; - } - else vec_del1 (sm->addresses, i); + update_per_vrf_sessions_vec (fib_index, 0 /*is_del*/); - /* Delete external address from FIB */ - pool_foreach (interface, sm->interfaces) + if (!is_inside) { - if (nat_interface_is_inside (interface)) - continue; + i->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE; - 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; + 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; + } - snat_add_del_addr_to_fib (&addr, 32, interface->sw_if_index, 0); - break; - } + nat44_ed_add_del_addr_to_fib_foreach_addr (sw_if_index, 1); + nat44_ed_add_del_addr_to_fib_foreach_addr_only_sm (sw_if_index, 1); + } + else + { + i->flags |= NAT_INTERFACE_FLAG_IS_INSIDE; + } return 0; } -void -expire_per_vrf_sessions (u32 fib_index) +int +nat44_ed_del_interface (u32 sw_if_index, u8 is_inside) { - per_vrf_sessions_t *per_vrf_sessions; - snat_main_per_thread_data_t *tsm; + const char *del_feature_name, *feature_name; snat_main_t *sm = &snat_main; - /* *INDENT-OFF* */ - vec_foreach (tsm, sm->per_thread_data) + nat_outside_fib_t *outside_fib; + snat_interface_t *i; + u32 fib_index; + int rv; + + if (!sm->enabled) { - vec_foreach (per_vrf_sessions, tsm->per_vrf_sessions_vec) - { - if ((per_vrf_sessions->rx_fib_index == fib_index) || - (per_vrf_sessions->tx_fib_index == fib_index)) - { - per_vrf_sessions->expired = 1; - } - } + nat_log_err ("nat44 is disabled"); + return VNET_API_ERROR_UNSUPPORTED; } - /* *INDENT-ON* */ -} -void -update_per_vrf_sessions_vec (u32 fib_index, int is_del) -{ - snat_main_t *sm = &snat_main; - nat_fib_t *fib; + 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; + } + + 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"; + } + + 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); + + if (is_inside) + { + i->flags &= ~NAT_INTERFACE_FLAG_IS_INSIDE; + } + else + { + i->flags &= ~NAT_INTERFACE_FLAG_IS_OUTSIDE; + } + } + 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"; + } + + 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); + + // remove interface + pool_put (sm->interfaces, i); + } - // we don't care if it is outside/inside fib - // we just care about their ref_count - // if it reaches 0 sessions should expire - // because the fib isn't valid for NAT anymore + fib_index = + fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index); - vec_foreach (fib, sm->fibs) - { - if (fib->fib_index == fib_index) - { - if (is_del) - { - fib->ref_count--; - if (!fib->ref_count) - { - vec_del1 (sm->fibs, fib - sm->fibs); - expire_per_vrf_sessions (fib_index); - } - return; - } - else - fib->ref_count++; - } - } - if (!is_del) + update_per_vrf_sessions_vec (fib_index, 1 /*is_del*/); + + if (!is_inside) { - vec_add2 (sm->fibs, fib, 1); - fib->ref_count = 1; - fib->fib_index = fib_index; + 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_addr_to_fib_foreach_addr (sw_if_index, 0); + nat44_ed_add_del_addr_to_fib_foreach_addr_only_sm (sw_if_index, 0); } + + return 0; } int -snat_interface_add_del (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; - 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) { @@ -1447,205 +1860,97 @@ 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 (sm->static_mapping_only && !(sm->static_mapping_connection_tracking)) - feature_name = is_inside ? "nat44-in2out-fast" : "nat44-out2in-fast"; - else + if (nat44_ed_get_interface (sm->interfaces, sw_if_index)) { - 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"; + nat_log_err ("error interface already configured"); + return VNET_API_ERROR_VALUE_EXIST; } - ASSERT (sm->frame_queue_nelts > 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); - - 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); - - update_per_vrf_sessions_vec (fib_index, is_del); + 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 (!is_inside) + if (sm->num_workers > 1) { - /* *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) + rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 1); + if (rv) { - vec_add2 (sm->outside_fibs, outside_fib, 1); - outside_fib->refcount = 1; - outside_fib->fib_index = fib_index; + return rv; } - } - -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"; - } - - 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; - 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"; - - feature_name = "nat44-ed-classify"; - } + rv = ip4_sv_reass_output_enable_disable_with_refcnt (sw_if_index, 1); + if (rv) + { + return rv; + } - 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; - } + 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, 1, 0, 0); + } + else + { + 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); } - 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); + pool_get (sm->output_feature_interfaces, i); + i->sw_if_index = sw_if_index; + i->flags = 0; + i->flags |= NAT_INTERFACE_FLAG_IS_INSIDE; + i->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE; - int rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 1); - if (rv) - return rv; + 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*/); -set_flags: - if (is_inside) + outside_fib = nat44_ed_get_outside_fib (sm->outside_fibs, fib_index); + if (outside_fib) { - i->flags |= NAT_INTERFACE_FLAG_IS_INSIDE; - return 0; + outside_fib->refcount++; } else - i->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE; - - /* 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); - - pool_foreach (m, sm->static_mappings) - { - if (!(is_addr_only_static_mapping(m)) || (m->local_addr.as_u32 == m->external_addr.as_u32)) - continue; + { + vec_add2 (sm->outside_fibs, outside_fib, 1); + outside_fib->fib_index = fib_index; + outside_fib->refcount = 1; + } - snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del); - } - /* *INDENT-ON* */ + nat44_ed_add_del_addr_to_fib_foreach_addr (sw_if_index, 1); + nat44_ed_add_del_addr_to_fib_foreach_addr_only_sm (sw_if_index, 1); return 0; } int -snat_interface_add_del_output_feature (u32 sw_if_index, - u8 is_inside, int is_del) +nat44_ed_del_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) { @@ -1653,156 +1958,72 @@ 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)) + i = nat44_ed_get_interface (sm->output_feature_interfaces, sw_if_index); + if (!i) { - nat_log_err ("error unsupported"); - return VNET_API_ERROR_UNSUPPORTED; + nat_log_err ("error interface couldn't be found"); + return VNET_API_ERROR_NO_SUCH_ENTRY; } - /* *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 (sm->num_workers > 1) { - /* *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) + rv = ip4_sv_reass_enable_disable_with_refcnt (sw_if_index, 0); + if (rv) { - vec_add2 (sm->outside_fibs, outside_fib, 1); - outside_fib->refcount = 1; - outside_fib->fib_index = fib_index; + return rv; } - } -feature_set: - if (is_inside) - { - 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; - } - - if (sm->num_workers > 1) - { - 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); + 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, !is_del, 0, 0); + { + 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, !is_del, 0, 0); + sw_if_index, 0, 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, 0); + if (rv) + { + return rv; + } - goto fib; - } - } - /* *INDENT-ON* */ + rv = ip4_sv_reass_output_enable_disable_with_refcnt (sw_if_index, 0); + 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, 0, 0, 0); + vnet_feature_enable_disable ("ip4-output", "nat-pre-in2out-output", + sw_if_index, 0, 0, 0); } - 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; - else - i->flags |= NAT_INTERFACE_FLAG_IS_OUTSIDE; - - /* Add/delete external addresses to FIB */ -fib: - if (is_inside) - return 0; + // remove interface + pool_put (sm->output_feature_interfaces, i); - /* *INDENT-OFF* */ - vec_foreach (ap, sm->addresses) - snat_add_del_addr_to_fib(&ap->addr, 32, sw_if_index, !is_del); + 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*/); - pool_foreach (m, sm->static_mappings) - { - if (!((is_addr_only_static_mapping(m))) || (m->local_addr.as_u32 == m->external_addr.as_u32)) - continue; + 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); + } + } - snat_add_del_addr_to_fib(&m->external_addr, 32, sw_if_index, !is_del); - } - /* *INDENT-ON* */ + nat44_ed_add_del_addr_to_fib_foreach_addr (sw_if_index, 0); + nat44_ed_add_del_addr_to_fib_foreach_addr_only_sm (sw_if_index, 0); return 0; } @@ -1820,7 +2041,6 @@ 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); @@ -1828,7 +2048,6 @@ 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); @@ -1845,9 +2064,8 @@ 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; @@ -1861,12 +2079,11 @@ 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; } @@ -1876,12 +2093,11 @@ snat_update_outside_fib (ip4_main_t * im, uword opaque, { 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; @@ -1915,26 +2131,17 @@ 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_addr_only_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 () @@ -1992,14 +2199,14 @@ 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; } @@ -2011,10 +2218,10 @@ nat44_set_node_indexes (snat_main_t * sm, vlib_main_t * vm) vlib_node_t *node; node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-out2in"); - sm->in2out_node_index = node->index; + sm->out2in_node_index = node->index; node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-in2out"); - sm->out2in_node_index = node->index; + sm->in2out_node_index = node->index; node = vlib_get_node_by_name (vm, (u8 *) "nat44-ed-in2out-output"); sm->in2out_output_node_index = node->index; @@ -2078,11 +2285,14 @@ 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 = stat_segment_new_entry ( + (u8 *) "/nat44-ed/max-cfg-sessions", STAT_DIR_TYPE_SCALAR_INDEX); #define _(x) \ nat_init_simple_counter (sm->counters.fastpath.in2out.x, #x, \ @@ -2115,23 +2325,24 @@ 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_addr_only_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 = @@ -2156,19 +2367,12 @@ 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; @@ -2181,9 +2385,10 @@ nat44_plugin_enable (nat44_config_t c) c.sessions = 63 * 1024; sm->max_translations_per_thread = c.sessions; + stat_segment_set_state_counter (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; @@ -2195,9 +2400,6 @@ 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); nat_affinity_enable (); @@ -2207,7 +2409,28 @@ 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; @@ -2234,44 +2457,44 @@ int nat44_plugin_disable () { 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); } } - vec_free (vec); + pool_free (sm->interfaces); + pool_free (pool); sm->interfaces = 0; - vec = vec_dup (sm->output_feature_interfaces); - vec_foreach (i, vec) + pool = pool_dup (sm->output_feature_interfaces); + pool_foreach (i, pool) { - 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); - + 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); } } - vec_free (vec); + pool_free (sm->output_feature_interfaces); + pool_free (pool); sm->output_feature_interfaces = 0; vec_free (sm->max_translations_per_fib); @@ -2308,14 +2531,16 @@ 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); } @@ -2362,63 +2587,21 @@ snat_free_outside_address_and_port (snat_address_t *addresses, a->busy_##n##_ports_per_thread[thread_index]--; \ break; foreach_nat_protocol -#undef _ - default : nat_elog_info (sm, "unknown protocol"); - return; - } -} - -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; - } +#undef _ + default : nat_elog_info (sm, "unknown protocol"); + return; } - - return VNET_API_ERROR_NO_SUCH_ENTRY; } 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) +snat_static_mapping_match (vlib_main_t *vm, 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; @@ -2457,15 +2640,13 @@ snat_static_mapping_match (snat_main_t * sm, 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; @@ -2485,12 +2666,12 @@ snat_static_mapping_match (snat_main_t * sm, .src_address = local->addr, }; - if (sm->worker_in2out_cb (&ip, m->fib_index, 0) == - thread_index) - { - vec_add1 (tmp, i); - } - } + if (nat44_ed_get_in2out_worker_index (0, &ip, m->fib_index, + 0) == thread_index) + { + vec_add1 (tmp, i); + } + } ASSERT (vec_len (tmp) != 0); } else @@ -2532,28 +2713,39 @@ 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; @@ -2561,77 +2753,101 @@ end: return 0; } -static u32 -nat44_ed_get_worker_in2out_cb (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; u32 hash; clib_bihash_kv_16_8_t kv16, value16; - snat_main_per_thread_data_t *tsm; - udp_header_t *udp; - - if (PREDICT_FALSE (is_output)) - { - u32 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, - } - , - }; - - udp = ip4_next_header (ip); - switch (vec_len (sm->outside_fibs)) + u32 fib_index = rx_fib_index; + if (b) + { + if (PREDICT_FALSE (is_output)) { - 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; - } + 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, + } , + }; - init_ed_k (&kv16, ip->src_address, udp->src_port, ip->dst_address, - udp->dst_port, fib_index, ip->protocol); + 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; + } + } - if (PREDICT_TRUE ( - !clib_bihash_search_16_8 (&sm->flow_hash, &kv16, &value16))) + if (PREDICT_FALSE (ip->protocol == IP_PROTOCOL_ICMP)) { - tsm = - vec_elt_at_index (sm->per_thread_data, - ed_value_get_thread_index (&value16)); - next_worker_index += tsm->thread_index; + 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, lookup_sport, lookup_daddr, + 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; + } + } + } - nat_elog_debug_handoff ( - sm, "HANDOFF IN2OUT-OUTPUT-FEATURE (session)", next_worker_index, - fib_index, clib_net_to_host_u32 (ip->src_address.as_u32), - clib_net_to_host_u32 (ip->dst_address.as_u32)); + 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); + + 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; + } - return next_worker_index; + // dst NAT + 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 (!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; } } @@ -2643,6 +2859,7 @@ nat44_ed_get_worker_in2out_cb (ip4_header_t *ip, u32 rx_fib_index, else next_worker_index += sm->workers[hash % _vec_len (sm->workers)]; +out: if (PREDICT_TRUE (!is_output)) { nat_elog_debug_handoff (sm, "HANDOFF IN2OUT", next_worker_index, @@ -2661,47 +2878,22 @@ nat44_ed_get_worker_in2out_cb (ip4_header_t *ip, u32 rx_fib_index, 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; 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, udp->dst_port, ip->src_address, - udp->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) + if (PREDICT_FALSE (proto == NAT_PROTOCOL_ICMP)) { ip4_address_t lookup_saddr, lookup_daddr; u16 lookup_sport, lookup_dport; @@ -2715,10 +2907,7 @@ nat44_ed_get_worker_out2in_cb (vlib_buffer_t * b, ip4_header_t * ip, 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), @@ -2728,6 +2917,23 @@ nat44_ed_get_worker_out2in_cb (vlib_buffer_t * b, ip4_header_t * ip, } } + 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, + 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))) { @@ -2749,11 +2955,11 @@ nat44_ed_get_worker_out2in_cb (vlib_buffer_t * b, ip4_header_t * ip, goto done; } - udp = ip4_next_header (ip); - port = udp->dst_port; + 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 @@ -2791,7 +2997,7 @@ nat44_ed_get_worker_out2in_cb (vlib_buffer_t * b, ip4_header_t * ip, (&sm->static_mapping_by_external, &kv, &value)) { 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; @@ -2864,6 +3070,9 @@ nat44_update_session_limit (u32 session_limit, u32 vrf_id) return 1; sm->max_translations_per_thread = nat44_get_max_session_limit (); + stat_segment_set_state_counter (sm->max_cfg_sessions_gauge, + sm->max_translations_per_thread); + sm->translation_buckets = nat_calc_bihash_buckets (sm->max_translations_per_thread); @@ -2994,235 +3203,286 @@ nat44_ed_sessions_clear () } 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_addr_only_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; + clib_bihash_kv_8_8_t kv, value; snat_static_map_resolve_t *rp; + snat_main_t *sm = &snat_main; snat_static_mapping_t *m; - clib_bihash_kv_8_8_t kv, value; - int i, rv; - ip4_address_t l_addr; + int i, rv = 0, match = 0; if (!sm->enabled) - return; + { + return; + } + // find first addr_only resolve record by sw_if_index 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; + if (rp->addr_only && rp->sw_if_index == sw_if_index) + { + match = 1; + break; + } + } + if (!match) + { + return; } - return; - -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; + { + m = 0; + } else - m = pool_elt_at_index (sm->static_mappings, value.value); + { + m = pool_elt_at_index (sm->static_mappings, value.value); + } - if (!is_delete) + if (is_delete) { - /* Don't trip over lease renewal, static config */ if (m) - return; + { + rv = nat44_ed_del_static_mapping (rp->l_addr, address[0], rp->l_port, + rp->e_port, rp->proto, rp->vrf_id, + ~0, rp->flags); + } } else { if (!m) - return; + { + rv = nat44_ed_add_static_mapping ( + rp->l_addr, address[0], rp->l_port, rp->e_port, rp->proto, + rp->vrf_id, ~0, rp->flags, rp->pool_addr, rp->tag); + } + // else: don't trip over lease renewal, static config } - - /* 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); + { + nat_elog_notice_X1 (sm, "nat44_ed_del_static_mapping returned %d", "i4", + rv); + } +} + +static_always_inline int +is_sw_if_index_reg_for_auto_resolve (u32 *sw_if_indices, u32 sw_if_index) +{ + u32 *i; + vec_foreach (i, sw_if_indices) + { + if (*i == sw_if_index) + { + return 1; + } + } + return 0; } 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; - u8 twice_nat = 0; snat_address_t *addresses = sm->addresses; + u8 twice_nat = 0; + int rv, i; 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 (!is_sw_if_index_reg_for_auto_resolve (sm->auto_add_sw_if_indices, + sw_if_index)) { - twice_nat = 1; - addresses = sm->twice_nat_addresses; - if (sw_if_index == sm->auto_add_sw_if_indices_twice_nat[i]) - goto match; + if (!is_sw_if_index_reg_for_auto_resolve ( + sm->auto_add_sw_if_indices_twice_nat, sw_if_index)) + { + return; + } + else + { + addresses = sm->twice_nat_addresses; + twice_nat = 1; + } } - return; - -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) - return; + // don't trip over lease renewal, static config + for (i = 0; i < vec_len (addresses); i++) + { + if (addresses[i].addr.as_u32 == address->as_u32) + { + return; + } + } + + (void) nat44_ed_add_address (address, ~0, twice_nat); - (void) snat_add_address (sm, address, ~0, twice_nat); - /* Scan static map resolution vector */ - for (j = 0; j < vec_len (sm->to_resolve); j++) + // scan static mapping switch address resolution record vector + for (i = 0; i < vec_len (sm->to_resolve); i++) { - rp = sm->to_resolve + j; + rp = sm->to_resolve + i; if (rp->addr_only) - continue; - /* On this interface? */ + { + continue; + } 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); + rv = nat44_ed_add_static_mapping ( + 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_elog_notice_X1 (sm, "snat_add_static_mapping returned %d", - "i4", rv); + { + nat_elog_notice_X1 (sm, "add_static_mapping returned %d", + "i4", rv); + } } } - return; } else { - (void) snat_del_address (sm, address[0], 1, twice_nat); - return; + // remove all static mapping records + (void) nat44_ed_del_address (address[0], 1, twice_nat); + } +} + +int +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; + u32 *auto_add_sw_if_indices = twice_nat ? + sm->auto_add_sw_if_indices_twice_nat : + sm->auto_add_sw_if_indices; + int i; + + for (i = 0; i < vec_len (auto_add_sw_if_indices); i++) + { + if (auto_add_sw_if_indices[i] == sw_if_index) + { + return VNET_API_ERROR_VALUE_EXIST; + } } + + // 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); + } + + // 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) nat44_ed_add_address (first_int_addr, ~0, twice_nat); + } + + return 0; } int -snat_add_interface_address (snat_main_t * sm, u32 sw_if_index, int is_del, - u8 twice_nat) +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; 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; + u32 *auto_add_sw_if_indices; + + if (!sm->enabled) + { + return VNET_API_ERROR_UNSUPPORTED; + } - first_int_addr = ip4_interface_first_address (ip4_main, sw_if_index, 0 /* just want the address */ - ); + auto_add_sw_if_indices = twice_nat ? sm->auto_add_sw_if_indices_twice_nat : + sm->auto_add_sw_if_indices; for (i = 0; i < vec_len (auto_add_sw_if_indices); i++) { if (auto_add_sw_if_indices[i] == sw_if_index) { - if (is_del) + first_int_addr = + ip4_interface_first_address (ip4_main, sw_if_index, 0); + if (first_int_addr) { - /* if have address remove it */ - if (first_int_addr) - (void) snat_del_address (sm, first_int_addr[0], 1, twice_nat); - else + // remove all static mapping records + (void) nat44_ed_del_address (first_int_addr[0], 1, twice_nat); + } + else + { + for (j = 0; j < vec_len (sm->to_resolve); j++) { - for (j = 0; j < vec_len (sm->to_resolve); j++) + rp = sm->to_resolve + j; + if (rp->sw_if_index == sw_if_index) { - rp = sm->to_resolve + j; - if (rp->sw_if_index == sw_if_index) - vec_add1 (indices_to_delete, j); + vec_add1 (indices_to_delete, j); } - if (vec_len (indices_to_delete)) + } + if (vec_len (indices_to_delete)) + { + for (j = vec_len (indices_to_delete) - 1; j >= 0; j--) { - for (j = vec_len (indices_to_delete) - 1; j >= 0; j--) - vec_del1 (sm->to_resolve, j); - vec_free (indices_to_delete); + 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; + if (twice_nat) + { + vec_del1 (sm->auto_add_sw_if_indices_twice_nat, i); + } + else + { + vec_del1 (sm->auto_add_sw_if_indices, i); + } return 0; } } - - if (is_del) - return VNET_API_ERROR_NO_SUCH_ENTRY; - - /* 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); - - /* If the address is already bound - or static - add it now */ - if (first_int_addr) - (void) snat_add_address (sm, first_int_addr, ~0, twice_nat); - - return 0; + return VNET_API_ERROR_NO_SUCH_ENTRY; } 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 (&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); @@ -3247,7 +3507,6 @@ 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), @@ -3268,7 +3527,6 @@ 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) @@ -3337,15 +3595,14 @@ 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) + 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; @@ -3388,7 +3645,10 @@ 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 @@ -3398,14 +3658,32 @@ 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) @@ -3416,8 +3694,10 @@ 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)) { @@ -3434,32 +3714,86 @@ 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_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: + 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 NAT_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: 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) @@ -3484,29 +3818,66 @@ 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, + nat_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) { - 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, nat_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, nat_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) { @@ -3536,6 +3907,15 @@ 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; }