X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fnat%2Fout2in_ed.c;h=b0e8892f77a59bfd4b93f47a6cf08c3f19c6a51a;hb=25fd8ad03;hp=aa7f7e4011764dd193068ed40dddac14ddab839d;hpb=6c01dceea5c612373453db7f1ccda589a2cd782e;p=vpp.git diff --git a/src/plugins/nat/out2in_ed.c b/src/plugins/nat/out2in_ed.c index aa7f7e40117..b0e8892f77a 100644 --- a/src/plugins/nat/out2in_ed.c +++ b/src/plugins/nat/out2in_ed.c @@ -19,36 +19,18 @@ #include #include -#include #include #include #include -#include +#include #include #include -#include -#include +#include #include - -#define foreach_nat_out2in_ed_error \ -_(UNSUPPORTED_PROTOCOL, "Unsupported protocol") \ -_(OUT2IN_PACKETS, "Good out2in packets processed") \ -_(OUT_OF_PORTS, "Out of ports") \ -_(BAD_ICMP_TYPE, "unsupported ICMP type") \ -_(NO_TRANSLATION, "No translation") \ -_(MAX_SESSIONS_EXCEEDED, "Maximum sessions exceeded") \ -_(DROP_FRAGMENT, "Drop fragment") \ -_(MAX_REASS, "Maximum reassemblies exceeded") \ -_(MAX_FRAG, "Maximum fragments per reassembly exceeded")\ -_(NON_SYN, "non-SYN packet try to create session") - -typedef enum -{ -#define _(sym,str) NAT_OUT2IN_ED_ERROR_##sym, - foreach_nat_out2in_ed_error -#undef _ - NAT_OUT2IN_ED_N_ERROR, -} nat_out2in_ed_error_t; +#include +#include +#include +#include static char *nat_out2in_ed_error_strings[] = { #define _(sym,string) string, @@ -56,17 +38,6 @@ static char *nat_out2in_ed_error_strings[] = { #undef _ }; -typedef enum -{ - NAT44_ED_OUT2IN_NEXT_DROP, - NAT44_ED_OUT2IN_NEXT_LOOKUP, - NAT44_ED_OUT2IN_NEXT_ICMP_ERROR, - NAT44_ED_OUT2IN_NEXT_IN2OUT, - NAT44_ED_OUT2IN_NEXT_SLOW_PATH, - NAT44_ED_OUT2IN_NEXT_REASS, - NAT44_ED_OUT2IN_N_NEXT, -} nat44_ed_out2in_next_t; - typedef struct { u32 sw_if_index; @@ -75,10 +46,6 @@ typedef struct u32 is_slow_path; } nat44_ed_out2in_trace_t; -vlib_node_registration_t nat44_ed_out2in_node; -vlib_node_registration_t nat44_ed_out2in_slowpath_node; -vlib_node_registration_t nat44_ed_out2in_reass_node; - static u8 * format_nat44_ed_out2in_trace (u8 * s, va_list * args) { @@ -104,21 +71,24 @@ icmp_out2in_ed_slow_path (snat_main_t * sm, vlib_buffer_t * b0, vlib_node_runtime_t * node, u32 next0, f64 now, u32 thread_index, snat_session_t ** p_s0) { + vlib_main_t *vm = vlib_get_main (); + next0 = icmp_out2in (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, next0, thread_index, p_s0, 0); snat_session_t *s0 = *p_s0; - if (PREDICT_TRUE (next0 != NAT44_ED_OUT2IN_NEXT_DROP && s0)) + if (PREDICT_TRUE (next0 != NAT_NEXT_DROP && s0)) { /* Accounting */ nat44_session_update_counters (s0, now, vlib_buffer_length_in_chain - (sm->vlib_main, b0)); + (vm, b0), thread_index); /* Per-user LRU list maintenance */ nat44_session_update_lru (sm, s0, thread_index); } return next0; } +#ifndef CLIB_MARCH_VARIANT int nat44_o2i_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg) { @@ -126,11 +96,13 @@ nat44_o2i_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg) nat44_is_idle_session_ctx_t *ctx = arg; snat_session_t *s; u64 sess_timeout_time; - nat_ed_ses_key_t ed_key; + u8 proto; + u16 r_port, l_port; + ip4_address_t *l_addr, *r_addr; + u32 fib_index; clib_bihash_kv_16_8_t ed_kv; int i; - snat_address_t *a; - snat_session_key_t key; + //snat_address_t *a; snat_main_per_thread_data_t *tsm = vec_elt_at_index (sm->per_thread_data, ctx->thread_index); @@ -138,55 +110,67 @@ nat44_o2i_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg) sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s); if (ctx->now >= sess_timeout_time) { - ed_key.l_addr = s->in2out.addr; - ed_key.r_addr = s->ext_host_addr; - ed_key.fib_index = s->in2out.fib_index; + l_addr = &s->in2out.addr; + r_addr = &s->ext_host_addr; + fib_index = s->in2out.fib_index; if (snat_is_unk_proto_session (s)) { - ed_key.proto = s->in2out.port; - ed_key.r_port = 0; - ed_key.l_port = 0; + proto = s->in2out.port; + r_port = 0; + l_port = 0; } else { - ed_key.proto = snat_proto_to_ip_proto (s->in2out.protocol); - ed_key.l_port = s->in2out.port; - ed_key.r_port = s->ext_host_port; + proto = nat_proto_to_ip_proto (s->nat_proto); + l_port = s->in2out.port; + r_port = s->ext_host_port; } if (is_twice_nat_session (s)) { - ed_key.r_addr = s->ext_host_nat_addr; - ed_key.r_port = s->ext_host_nat_port; + r_addr = &s->ext_host_nat_addr; + r_port = s->ext_host_nat_port; } - ed_kv.key[0] = ed_key.as_u64[0]; - ed_kv.key[1] = ed_key.as_u64[1]; + init_ed_k (&ed_kv, *l_addr, l_port, *r_addr, r_port, fib_index, proto); if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &ed_kv, 0)) - nat_log_warn ("in2out_ed key del failed"); + nat_elog_warn ("in2out_ed key del failed"); if (snat_is_unk_proto_session (s)) goto delete; - snat_ipfix_logging_nat44_ses_delete (s->in2out.addr.as_u32, - s->out2in.addr.as_u32, - s->in2out.protocol, - s->in2out.port, - s->out2in.port, - s->in2out.fib_index); + nat_ipfix_logging_nat44_ses_delete (ctx->thread_index, + s->in2out.addr.as_u32, + s->out2in.addr.as_u32, + s->nat_proto, + s->in2out.port, + s->out2in.port, + s->in2out.fib_index); + + nat_syslog_nat44_sdel (s->user_index, s->in2out.fib_index, + &s->in2out.addr, s->in2out.port, + &s->ext_host_nat_addr, s->ext_host_nat_port, + &s->out2in.addr, s->out2in.port, + &s->ext_host_addr, s->ext_host_port, + s->nat_proto, is_twice_nat_session (s)); + + nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr, + s->ext_host_port, s->nat_proto, s->out2in.fib_index, + ctx->thread_index); if (is_twice_nat_session (s)) { for (i = 0; i < vec_len (sm->twice_nat_addresses); i++) { - key.protocol = s->in2out.protocol; - key.port = s->ext_host_nat_port; - a = sm->twice_nat_addresses + i; - if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32) - { - snat_free_outside_address_and_port (sm->twice_nat_addresses, - ctx->thread_index, - &key); - break; - } + // FIXME TODO this is obviously wrong code ... needs fix! + // key.protocol = s->nat_proto; + // key.port = s->ext_host_nat_port; + // a = sm->twice_nat_addresses + i; + // if (a->addr.as_u32 == s->ext_host_nat_addr.as_u32) + // { + // snat_free_outside_address_and_port (sm->twice_nat_addresses, + // ctx->thread_index, + // &key); + // break; + // } } } @@ -194,53 +178,100 @@ nat44_o2i_ed_is_idle_session_cb (clib_bihash_kv_16_8_t * kv, void *arg) goto delete; snat_free_outside_address_and_port (sm->addresses, ctx->thread_index, - &s->out2in); + &s->out2in.addr, s->out2in.port, + s->nat_proto); delete: - nat44_delete_session (sm, s, ctx->thread_index); + nat_ed_session_delete (sm, s, ctx->thread_index, 1); return 1; } return 0; } +#endif + +// allocate exact address based on preference +static_always_inline int +nat_alloc_addr_and_port_exact (snat_address_t * a, + u32 thread_index, + nat_protocol_t proto, + ip4_address_t * addr, + u16 * port, + u16 port_per_thread, u32 snat_thread_index) +{ + u32 portnum; + + switch (proto) + { +#define _(N, j, n, s) \ + case NAT_PROTOCOL_##N: \ + if (a->busy_##n##_ports_per_thread[thread_index] < port_per_thread) \ + { \ + while (1) \ + { \ + portnum = (port_per_thread * \ + snat_thread_index) + \ + snat_random_port(0, port_per_thread - 1) + 1024; \ + if (a->busy_##n##_port_refcounts[portnum]) \ + continue; \ + --a->busy_##n##_port_refcounts[portnum]; \ + a->busy_##n##_ports_per_thread[thread_index]++; \ + a->busy_##n##_ports++; \ + *addr = a->addr; \ + *port = clib_host_to_net_u16(portnum); \ + return 0; \ + } \ + } \ + break; + foreach_nat_protocol +#undef _ + default: + nat_elog_info ("unknown protocol"); + return 1; + } + + /* Totally out of translations to use... */ + nat_ipfix_logging_addresses_exhausted (thread_index, 0); + return 1; +} + static snat_session_t * create_session_for_static_mapping_ed (snat_main_t * sm, vlib_buffer_t * b, - snat_session_key_t l_key, - snat_session_key_t e_key, + ip4_address_t i2o_addr, + u16 i2o_port, + u32 i2o_fib_index, + ip4_address_t o2i_addr, + u16 o2i_port, + u32 o2i_fib_index, + nat_protocol_t nat_proto, vlib_node_runtime_t * node, + u32 rx_fib_index, u32 thread_index, twice_nat_type_t twice_nat, - lb_nat_type_t lb_nat, f64 now) + lb_nat_type_t lb_nat, f64 now, + snat_static_mapping_t * mapping) { snat_session_t *s; - snat_user_t *u; ip4_header_t *ip; udp_header_t *udp; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; clib_bihash_kv_16_8_t kv; - snat_session_key_t eh_key; nat44_is_idle_session_ctx_t ctx; - if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index))) + if (PREDICT_FALSE + (nat44_ed_maximum_sessions_exceeded (sm, rx_fib_index, thread_index))) { b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_SESSIONS_EXCEEDED]; - nat_log_notice ("maximum sessions exceeded"); + nat_elog_notice ("maximum sessions exceeded"); return 0; } - u = nat_user_get_or_create (sm, &l_key.addr, l_key.fib_index, thread_index); - if (!u) - { - nat_log_warn ("create NAT user failed"); - return 0; - } - - s = nat_ed_session_alloc (sm, u, thread_index, now); + s = nat_ed_session_alloc (sm, thread_index, now, nat_proto); if (!s) { - nat44_delete_user_with_no_session (sm, u, thread_index); - nat_log_warn ("create NAT session failed"); + b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_USER_SESS_EXCEEDED]; + nat_elog_warn ("create NAT session failed"); return 0; } @@ -248,122 +279,131 @@ create_session_for_static_mapping_ed (snat_main_t * sm, udp = ip4_next_header (ip); s->ext_host_addr.as_u32 = ip->src_address.as_u32; - s->ext_host_port = e_key.protocol == SNAT_PROTOCOL_ICMP ? 0 : udp->src_port; + s->ext_host_port = nat_proto == NAT_PROTOCOL_ICMP ? 0 : udp->src_port; s->flags |= SNAT_SESSION_FLAG_STATIC_MAPPING; if (lb_nat) s->flags |= SNAT_SESSION_FLAG_LOAD_BALANCING; if (lb_nat == AFFINITY_LB_NAT) s->flags |= SNAT_SESSION_FLAG_AFFINITY; s->flags |= SNAT_SESSION_FLAG_ENDPOINT_DEPENDENT; - s->out2in = e_key; - s->in2out = l_key; - s->in2out.protocol = s->out2in.protocol; - user_session_increment (sm, u, 1); + s->out2in.addr = o2i_addr; + s->out2in.port = o2i_port; + s->out2in.fib_index = o2i_fib_index; + s->in2out.addr = i2o_addr; + s->in2out.port = i2o_port; + s->in2out.fib_index = i2o_fib_index; + s->nat_proto = nat_proto; /* Add to lookup tables */ - make_ed_kv (&kv, &e_key.addr, &s->ext_host_addr, ip->protocol, - e_key.fib_index, e_key.port, s->ext_host_port); - kv.value = s - tsm->sessions; + init_ed_kv (&kv, o2i_addr, o2i_port, s->ext_host_addr, s->ext_host_port, + o2i_fib_index, ip->protocol, thread_index, s - tsm->sessions); ctx.now = now; ctx.thread_index = thread_index; - if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->out2in_ed, &kv, + if (clib_bihash_add_or_overwrite_stale_16_8 (&sm->out2in_ed, &kv, nat44_o2i_ed_is_idle_session_cb, &ctx)) - nat_log_notice ("out2in-ed key add failed"); + nat_elog_notice ("out2in-ed key add failed"); if (twice_nat == TWICE_NAT || (twice_nat == TWICE_NAT_SELF && - ip->src_address.as_u32 == l_key.addr.as_u32)) + ip->src_address.as_u32 == i2o_addr.as_u32)) { - eh_key.protocol = e_key.protocol; - if (snat_alloc_outside_address_and_port (sm->twice_nat_addresses, 0, - thread_index, &eh_key, - sm->port_per_thread, - tsm->snat_thread_index)) + int rc = 0; + snat_address_t *filter = 0; + + // if exact address is specified use this address + if (is_exact_address (mapping)) + { + snat_address_t *ap; + vec_foreach (ap, sm->twice_nat_addresses) + { + if (mapping->pool_addr.as_u32 == ap->addr.as_u32) + { + filter = ap; + break; + } + } + } + + if (filter) + { + rc = nat_alloc_addr_and_port_exact (filter, + thread_index, + nat_proto, + &s->ext_host_nat_addr, + &s->ext_host_nat_port, + sm->port_per_thread, + tsm->snat_thread_index); + s->flags |= SNAT_SESSION_FLAG_EXACT_ADDRESS; + } + else + { + rc = + snat_alloc_outside_address_and_port (sm->twice_nat_addresses, 0, + thread_index, nat_proto, + &s->ext_host_nat_addr, + &s->ext_host_nat_port, + sm->port_per_thread, + tsm->snat_thread_index); + } + + if (rc) { b->error = node->errors[NAT_OUT2IN_ED_ERROR_OUT_OF_PORTS]; - nat44_delete_session (sm, s, thread_index); - if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &kv, 0)) - nat_log_notice ("out2in-ed key del failed"); + nat_ed_session_delete (sm, s, thread_index, 1); + if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &kv, 0)) + nat_elog_notice ("out2in-ed key del failed"); return 0; } - s->ext_host_nat_addr.as_u32 = eh_key.addr.as_u32; - s->ext_host_nat_port = eh_key.port; + s->flags |= SNAT_SESSION_FLAG_TWICE_NAT; - make_ed_kv (&kv, &l_key.addr, &s->ext_host_nat_addr, ip->protocol, - l_key.fib_index, l_key.port, s->ext_host_nat_port); + init_ed_kv (&kv, i2o_addr, i2o_port, s->ext_host_nat_addr, + s->ext_host_nat_port, i2o_fib_index, ip->protocol, + thread_index, s - tsm->sessions); } else { - make_ed_kv (&kv, &l_key.addr, &s->ext_host_addr, ip->protocol, - l_key.fib_index, l_key.port, s->ext_host_port); + init_ed_kv (&kv, i2o_addr, i2o_port, s->ext_host_addr, + s->ext_host_port, i2o_fib_index, ip->protocol, + thread_index, s - tsm->sessions); } - kv.value = s - tsm->sessions; if (clib_bihash_add_or_overwrite_stale_16_8 (&tsm->in2out_ed, &kv, nat44_i2o_ed_is_idle_session_cb, &ctx)) - nat_log_notice ("in2out-ed key add failed"); + nat_elog_notice ("in2out-ed key add failed"); - return s; -} + nat_ipfix_logging_nat44_ses_create (thread_index, + s->in2out.addr.as_u32, + s->out2in.addr.as_u32, + s->nat_proto, + s->in2out.port, + s->out2in.port, s->in2out.fib_index); -static_always_inline int -icmp_get_ed_key (ip4_header_t * ip0, nat_ed_ses_key_t * p_key0) -{ - icmp46_header_t *icmp0; - nat_ed_ses_key_t key0; - icmp_echo_header_t *echo0, *inner_echo0 = 0; - ip4_header_t *inner_ip0; - void *l4_header = 0; - icmp46_header_t *inner_icmp0; + nat_syslog_nat44_sadd (s->user_index, s->in2out.fib_index, + &s->in2out.addr, s->in2out.port, + &s->ext_host_nat_addr, s->ext_host_nat_port, + &s->out2in.addr, s->out2in.port, + &s->ext_host_addr, s->ext_host_port, + s->nat_proto, is_twice_nat_session (s)); - icmp0 = (icmp46_header_t *) ip4_next_header (ip0); - echo0 = (icmp_echo_header_t *) (icmp0 + 1); + nat_ha_sadd (&s->in2out.addr, s->in2out.port, &s->out2in.addr, + s->out2in.port, &s->ext_host_addr, s->ext_host_port, + &s->ext_host_nat_addr, s->ext_host_nat_port, + s->nat_proto, s->in2out.fib_index, s->flags, thread_index, 0); - if (!icmp_is_error_message (icmp0)) - { - key0.proto = IP_PROTOCOL_ICMP; - key0.l_addr = ip0->dst_address; - key0.r_addr = ip0->src_address; - key0.l_port = echo0->identifier; - key0.r_port = 0; - } - else - { - inner_ip0 = (ip4_header_t *) (echo0 + 1); - l4_header = ip4_next_header (inner_ip0); - key0.proto = inner_ip0->protocol; - key0.l_addr = inner_ip0->src_address; - key0.r_addr = inner_ip0->dst_address; - switch (ip_proto_to_snat_proto (inner_ip0->protocol)) - { - case SNAT_PROTOCOL_ICMP: - inner_icmp0 = (icmp46_header_t *) l4_header; - inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1); - key0.l_port = inner_echo0->identifier; - key0.r_port = 0; - break; - case SNAT_PROTOCOL_UDP: - case SNAT_PROTOCOL_TCP: - key0.l_port = ((tcp_udp_header_t *) l4_header)->src_port; - key0.r_port = ((tcp_udp_header_t *) l4_header)->dst_port; - break; - default: - return -1; - } - } - *p_key0 = key0; - return 0; + per_vrf_sessions_register_session (s, thread_index); + + return s; } static int -next_src_nat (snat_main_t * sm, ip4_header_t * ip, u8 proto, u16 src_port, +next_src_nat (snat_main_t * sm, ip4_header_t * ip, u16 src_port, u16 dst_port, u32 thread_index, u32 rx_fib_index) { clib_bihash_kv_16_8_t kv, value; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - make_ed_kv (&kv, &ip->src_address, &ip->dst_address, proto, - rx_fib_index, src_port, dst_port); + init_ed_k (&kv, ip->src_address, src_port, ip->dst_address, dst_port, + rx_fib_index, ip->protocol); if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value)) return 1; @@ -371,210 +411,254 @@ next_src_nat (snat_main_t * sm, ip4_header_t * ip, u8 proto, u16 src_port, } static void -create_bypass_for_fwd (snat_main_t * sm, ip4_header_t * ip, u32 rx_fib_index, - u32 thread_index) +create_bypass_for_fwd (snat_main_t * sm, vlib_buffer_t * b, ip4_header_t * ip, + u32 rx_fib_index, u32 thread_index) { - nat_ed_ses_key_t key; clib_bihash_kv_16_8_t kv, value; udp_header_t *udp; - snat_user_t *u; snat_session_t *s = 0; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - f64 now = vlib_time_now (sm->vlib_main); + vlib_main_t *vm = vlib_get_main (); + f64 now = vlib_time_now (vm); + u16 l_port, r_port; if (ip->protocol == IP_PROTOCOL_ICMP) { - if (icmp_get_ed_key (ip, &key)) + if (get_icmp_o2i_ed_key + (b, ip, rx_fib_index, ~0, ~0, 0, &l_port, &r_port, &kv)) return; } - else if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP) - { - udp = ip4_next_header (ip); - key.r_addr = ip->src_address; - key.l_addr = ip->dst_address; - key.proto = ip->protocol; - key.l_port = udp->dst_port; - key.r_port = udp->src_port; - } else { - key.r_addr = ip->src_address; - key.l_addr = ip->dst_address; - key.proto = ip->protocol; - key.l_port = key.r_port = 0; + if (ip->protocol == IP_PROTOCOL_UDP || ip->protocol == IP_PROTOCOL_TCP) + { + udp = ip4_next_header (ip); + l_port = udp->dst_port; + r_port = udp->src_port; + } + else + { + l_port = 0; + r_port = 0; + } + init_ed_k (&kv, ip->dst_address, l_port, ip->src_address, r_port, + rx_fib_index, ip->protocol); } - key.fib_index = 0; - kv.key[0] = key.as_u64[0]; - kv.key[1] = key.as_u64[1]; if (!clib_bihash_search_16_8 (&tsm->in2out_ed, &kv, &value)) { - s = pool_elt_at_index (tsm->sessions, value.value); + ASSERT (thread_index == ed_value_get_thread_index (&value)); + s = + pool_elt_at_index (tsm->sessions, + ed_value_get_session_index (&value)); + } + else if (ip->protocol == IP_PROTOCOL_ICMP && + icmp_type_is_error_message + (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)) + { + return; } else { - if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index))) - return; + u32 proto; - u = nat_user_get_or_create (sm, &ip->dst_address, sm->inside_fib_index, - thread_index); - if (!u) - { - nat_log_warn ("create NAT user failed"); - return; - } + if (PREDICT_FALSE + (nat44_ed_maximum_sessions_exceeded + (sm, rx_fib_index, thread_index))) + return; - s = nat_ed_session_alloc (sm, u, thread_index, now); + s = nat_ed_session_alloc (sm, thread_index, now, ip->protocol); if (!s) { - nat44_delete_user_with_no_session (sm, u, thread_index); - nat_log_warn ("create NAT session failed"); + nat_elog_warn ("create NAT session failed"); return; } - s->ext_host_addr = key.r_addr; - s->ext_host_port = key.r_port; + proto = ip_proto_to_nat_proto (ip->protocol); + + s->ext_host_addr = ip->src_address; + s->ext_host_port = r_port; s->flags |= SNAT_SESSION_FLAG_FWD_BYPASS; - s->out2in.addr = key.l_addr; - s->out2in.port = key.l_port; - s->out2in.protocol = ip_proto_to_snat_proto (key.proto); - s->out2in.fib_index = 0; - s->in2out = s->out2in; - user_session_increment (sm, u, 0); + s->out2in.addr = ip->dst_address; + s->out2in.port = l_port; + s->nat_proto = proto; + if (proto == NAT_PROTOCOL_OTHER) + { + s->flags |= SNAT_SESSION_FLAG_UNKNOWN_PROTO; + s->out2in.port = ip->protocol; + } + s->out2in.fib_index = rx_fib_index; + s->in2out.addr = s->out2in.addr; + s->in2out.port = s->out2in.port; + s->in2out.fib_index = s->out2in.fib_index; kv.value = s - tsm->sessions; if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &kv, 1)) - nat_log_notice ("in2out_ed key add failed"); + nat_elog_notice ("in2out_ed key add failed"); + + per_vrf_sessions_register_session (s, thread_index); } if (ip->protocol == IP_PROTOCOL_TCP) { tcp_header_t *tcp = ip4_next_header (ip); - if (nat44_set_tcp_session_state_o2i (sm, s, tcp, thread_index)) - return; + nat44_set_tcp_session_state_o2i (sm, now, s, tcp->flags, + tcp->ack_number, tcp->seq_number, + thread_index); } /* Accounting */ - nat44_session_update_counters (s, now, 0); + nat44_session_update_counters (s, now, 0, thread_index); /* Per-user LRU list maintenance */ nat44_session_update_lru (sm, s, thread_index); } +static inline void +create_bypass_for_fwd_worker (snat_main_t * sm, vlib_buffer_t * b, + ip4_header_t * ip, u32 rx_fib_index) +{ + ip4_header_t ip_wkr = { + .src_address = ip->dst_address, + }; + u32 thread_index = sm->worker_in2out_cb (&ip_wkr, rx_fib_index, 0); + + create_bypass_for_fwd (sm, b, ip, rx_fib_index, thread_index); +} + +#ifndef CLIB_MARCH_VARIANT u32 icmp_match_out2in_ed (snat_main_t * sm, vlib_node_runtime_t * node, - u32 thread_index, vlib_buffer_t * b, ip4_header_t * ip, - u8 * p_proto, snat_session_key_t * p_value, - u8 * p_dont_translate, void *d, void *e) + u32 thread_index, vlib_buffer_t * b, + ip4_header_t * ip, ip4_address_t * addr, + u16 * port, u32 * fib_index, nat_protocol_t * proto, + void *d, void *e, u8 * dont_translate) { u32 next = ~0, sw_if_index, rx_fib_index; - icmp46_header_t *icmp; - nat_ed_ses_key_t key; clib_bihash_kv_16_8_t kv, value; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; snat_session_t *s = 0; - u8 dont_translate = 0, is_addr_only, identity_nat; - snat_session_key_t e_key, l_key; + u8 is_addr_only, identity_nat; + u16 l_port, r_port; + vlib_main_t *vm = vlib_get_main (); + ip4_address_t sm_addr; + u16 sm_port; + u32 sm_fib_index; + *dont_translate = 0; + snat_static_mapping_t *m; - icmp = (icmp46_header_t *) ip4_next_header (ip); sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX]; rx_fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index); - if (icmp_get_ed_key (ip, &key)) + if (get_icmp_o2i_ed_key + (b, ip, rx_fib_index, ~0, ~0, proto, &l_port, &r_port, &kv)) { b->error = node->errors[NAT_OUT2IN_ED_ERROR_UNSUPPORTED_PROTOCOL]; - next = NAT44_ED_OUT2IN_NEXT_DROP; + next = NAT_NEXT_DROP; goto out; } - key.fib_index = rx_fib_index; - kv.key[0] = key.as_u64[0]; - kv.key[1] = key.as_u64[1]; - if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv, &value)) + if (clib_bihash_search_16_8 (&sm->out2in_ed, &kv, &value)) { - /* Try to match static mapping */ - e_key.addr = ip->dst_address; - e_key.port = key.l_port; - e_key.protocol = ip_proto_to_snat_proto (key.proto); - e_key.fib_index = rx_fib_index; if (snat_static_mapping_match - (sm, e_key, &l_key, 1, &is_addr_only, 0, 0, 0, &identity_nat)) + (sm, ip->dst_address, l_port, rx_fib_index, + ip_proto_to_nat_proto (ip->protocol), &sm_addr, &sm_port, + &sm_fib_index, 1, &is_addr_only, 0, 0, 0, &identity_nat, &m)) { + // static mapping not matched if (!sm->forwarding_enabled) { /* Don't NAT packet aimed at the intfc address */ if (PREDICT_FALSE (is_interface_addr (sm, node, sw_if_index, ip->dst_address.as_u32))) { - dont_translate = 1; - goto out; + *dont_translate = 1; + } + else + { + b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; + next = NAT_NEXT_DROP; } - b->error = node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; - next = NAT44_ED_OUT2IN_NEXT_DROP; - goto out; } else { - dont_translate = 1; - if (next_src_nat (sm, ip, key.proto, key.l_port, key.r_port, + *dont_translate = 1; + if (next_src_nat (sm, ip, l_port, r_port, thread_index, rx_fib_index)) { - next = NAT44_ED_OUT2IN_NEXT_IN2OUT; - goto out; + next = NAT_NEXT_IN2OUT_ED_FAST_PATH; + } + else + { + if (sm->num_workers > 1) + create_bypass_for_fwd_worker (sm, b, ip, rx_fib_index); + else + create_bypass_for_fwd (sm, b, ip, rx_fib_index, + thread_index); } - create_bypass_for_fwd (sm, ip, rx_fib_index, thread_index); - goto out; } + goto out; } - if (PREDICT_FALSE (icmp->type != ICMP4_echo_reply && - (icmp->type != ICMP4_echo_request || !is_addr_only))) + if (PREDICT_FALSE + (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags != + ICMP4_echo_reply + && (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags != + ICMP4_echo_request || !is_addr_only))) { b->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE]; - next = NAT44_ED_OUT2IN_NEXT_DROP; + next = NAT_NEXT_DROP; goto out; } if (PREDICT_FALSE (identity_nat)) { - dont_translate = 1; + *dont_translate = 1; goto out; } /* Create session initiated by host from external network */ - s = create_session_for_static_mapping_ed (sm, b, l_key, e_key, node, - thread_index, 0, 0, - vlib_time_now - (sm->vlib_main)); - + s = + create_session_for_static_mapping_ed (sm, b, sm_addr, sm_port, + sm_fib_index, ip->dst_address, + l_port, rx_fib_index, *proto, + node, rx_fib_index, + thread_index, 0, 0, + vlib_time_now (vm), m); if (!s) - { - next = NAT44_ED_OUT2IN_NEXT_DROP; - goto out; - } + next = NAT_NEXT_DROP; } else { - if (PREDICT_FALSE (icmp->type != ICMP4_echo_reply && - icmp->type != ICMP4_echo_request && - !icmp_is_error_message (icmp))) + if (PREDICT_FALSE + (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags != + ICMP4_echo_reply + && vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags != + ICMP4_echo_request + && !icmp_type_is_error_message (vnet_buffer (b)->ip. + reass.icmp_type_or_tcp_flags))) { b->error = node->errors[NAT_OUT2IN_ED_ERROR_BAD_ICMP_TYPE]; - next = NAT44_ED_OUT2IN_NEXT_DROP; + next = NAT_NEXT_DROP; goto out; } - s = pool_elt_at_index (tsm->sessions, value.value); + ASSERT (thread_index == ed_value_get_thread_index (&value)); + s = + pool_elt_at_index (tsm->sessions, + ed_value_get_session_index (&value)); } - - *p_proto = ip_proto_to_snat_proto (key.proto); out: if (s) - *p_value = s->in2out; - *p_dont_translate = dont_translate; + { + *addr = s->in2out.addr; + *port = s->in2out.port; + *fib_index = s->in2out.fib_index; + } if (d) *(snat_session_t **) d = s; return next; } +#endif static snat_session_t * nat44_ed_out2in_unknown_proto (snat_main_t * sm, @@ -592,28 +676,32 @@ nat44_ed_out2in_unknown_proto (snat_main_t * sm, ip_csum_t sum; snat_session_t *s; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - snat_user_t *u; old_addr = ip->dst_address.as_u32; - make_ed_kv (&s_kv, &ip->dst_address, &ip->src_address, ip->protocol, - rx_fib_index, 0, 0); + init_ed_k (&s_kv, ip->dst_address, 0, ip->src_address, 0, rx_fib_index, + ip->protocol); - if (!clib_bihash_search_16_8 (&tsm->out2in_ed, &s_kv, &s_value)) + if (!clib_bihash_search_16_8 (&sm->out2in_ed, &s_kv, &s_value)) { - s = pool_elt_at_index (tsm->sessions, s_value.value); + ASSERT (thread_index == ed_value_get_thread_index (&s_value)); + s = + pool_elt_at_index (tsm->sessions, + ed_value_get_session_index (&s_value)); new_addr = ip->dst_address.as_u32 = s->in2out.addr.as_u32; } else { - if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index))) + if (PREDICT_FALSE + (nat44_ed_maximum_sessions_exceeded + (sm, rx_fib_index, thread_index))) { b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_SESSIONS_EXCEEDED]; - nat_log_notice ("maximum sessions exceeded"); + nat_elog_notice ("maximum sessions exceeded"); return 0; } - make_sm_kv (&kv, &ip->dst_address, 0, 0, 0); + init_nat_k (&kv, ip->dst_address, 0, 0, 0); if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) { @@ -625,20 +713,12 @@ nat44_ed_out2in_unknown_proto (snat_main_t * sm, new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32; - u = nat_user_get_or_create (sm, &m->local_addr, m->fib_index, - thread_index); - if (!u) - { - nat_log_warn ("create NAT user failed"); - return 0; - } - /* Create a new session */ - s = nat_ed_session_alloc (sm, u, thread_index, now); + s = nat_ed_session_alloc (sm, thread_index, now, ip->protocol); if (!s) { - nat44_delete_user_with_no_session (sm, u, thread_index); - nat_log_warn ("create NAT session failed"); + b->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_USER_SESS_EXCEEDED]; + nat_elog_warn ("create NAT session failed"); return 0; } @@ -651,18 +731,18 @@ nat44_ed_out2in_unknown_proto (snat_main_t * sm, s->in2out.addr.as_u32 = new_addr; s->in2out.fib_index = m->fib_index; s->in2out.port = s->out2in.port = ip->protocol; - user_session_increment (sm, u, 1); /* Add to lookup tables */ s_kv.value = s - tsm->sessions; - if (clib_bihash_add_del_16_8 (&tsm->out2in_ed, &s_kv, 1)) - nat_log_notice ("out2in key add failed"); + if (clib_bihash_add_del_16_8 (&sm->out2in_ed, &s_kv, 1)) + nat_elog_notice ("out2in key add failed"); - make_ed_kv (&s_kv, &ip->dst_address, &ip->src_address, ip->protocol, - m->fib_index, 0, 0); - s_kv.value = s - tsm->sessions; + init_ed_kv (&s_kv, ip->dst_address, 0, ip->src_address, 0, m->fib_index, + ip->protocol, thread_index, s - tsm->sessions); if (clib_bihash_add_del_16_8 (&tsm->in2out_ed, &s_kv, 1)) - nat_log_notice ("in2out key add failed"); + nat_elog_notice ("in2out key add failed"); + + per_vrf_sessions_register_session (s, thread_index); } /* Update IP checksum */ @@ -673,7 +753,8 @@ nat44_ed_out2in_unknown_proto (snat_main_t * sm, vnet_buffer (b)->sw_if_index[VLIB_TX] = s->in2out.fib_index; /* Accounting */ - nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b)); + nat44_session_update_counters (s, now, vlib_buffer_length_in_chain (vm, b), + thread_index); /* Per-user LRU list maintenance */ nat44_session_update_lru (sm, s, thread_index); @@ -681,1254 +762,703 @@ nat44_ed_out2in_unknown_proto (snat_main_t * sm, } static inline uword -nat44_ed_out2in_node_fn_inline (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame, int is_slow_path) +nat44_ed_out2in_fast_path_node_fn_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, + int is_multi_worker) { - u32 n_left_from, *from, *to_next, pkts_processed = 0, stats_node_index; - nat44_ed_out2in_next_t next_index; + u32 n_left_from, *from; snat_main_t *sm = &snat_main; f64 now = vlib_time_now (vm); u32 thread_index = vm->thread_index; snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; - stats_node_index = is_slow_path ? nat44_ed_out2in_slowpath_node.index : - nat44_ed_out2in_node.index; - from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; - next_index = node->cached_next_index; + + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; + u16 nexts[VLIB_FRAME_SIZE], *next = nexts; + vlib_get_buffers (vm, from, b, n_left_from); while (n_left_from > 0) { - u32 n_left_to_next; - - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - - while (n_left_from >= 4 && n_left_to_next >= 2) + vlib_buffer_t *b0; + u32 sw_if_index0, rx_fib_index0, proto0, old_addr0, new_addr0; + u16 old_port0, new_port0; + ip4_header_t *ip0; + udp_header_t *udp0; + tcp_header_t *tcp0; + snat_session_t *s0 = 0; + clib_bihash_kv_16_8_t kv0, value0; + ip_csum_t sum0; + + b0 = *b; + b++; + + /* Prefetch next iteration. */ + if (PREDICT_TRUE (n_left_from >= 2)) { - u32 bi0, bi1; - vlib_buffer_t *b0, *b1; - u32 next0, sw_if_index0, rx_fib_index0, proto0, old_addr0, - new_addr0; - u32 next1, sw_if_index1, rx_fib_index1, proto1, old_addr1, - new_addr1; - u16 old_port0, new_port0, old_port1, new_port1; - ip4_header_t *ip0, *ip1; - udp_header_t *udp0, *udp1; - tcp_header_t *tcp0, *tcp1; - icmp46_header_t *icmp0, *icmp1; - snat_session_t *s0 = 0, *s1 = 0; - clib_bihash_kv_16_8_t kv0, value0, kv1, value1; - ip_csum_t sum0, sum1; - snat_session_key_t e_key0, l_key0, e_key1, l_key1; - lb_nat_type_t lb_nat0, lb_nat1; - twice_nat_type_t twice_nat0, twice_nat1; - u8 identity_nat0, identity_nat1; - - /* Prefetch next iteration. */ - { - vlib_buffer_t *p2, *p3; + vlib_buffer_t *p2; - p2 = vlib_get_buffer (vm, from[2]); - p3 = vlib_get_buffer (vm, from[3]); + p2 = *b; - vlib_prefetch_buffer_header (p2, LOAD); - vlib_prefetch_buffer_header (p3, LOAD); + vlib_prefetch_buffer_header (p2, LOAD); - CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE); - CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE); - } + CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD); + } - /* speculatively enqueue b0 and b1 to the current next frame */ - to_next[0] = bi0 = from[0]; - to_next[1] = bi1 = from[1]; - from += 2; - to_next += 2; - n_left_from -= 2; - n_left_to_next -= 2; + next[0] = vnet_buffer2 (b0)->nat.arc_next; - b0 = vlib_get_buffer (vm, bi0); - b1 = vlib_get_buffer (vm, bi1); + vnet_buffer (b0)->snat.flags = 0; + ip0 = vlib_buffer_get_current (b0); - next0 = NAT44_ED_OUT2IN_NEXT_LOOKUP; - vnet_buffer (b0)->snat.flags = 0; - ip0 = vlib_buffer_get_current (b0); + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + rx_fib_index0 = + fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index0); - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - rx_fib_index0 = - fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, - sw_if_index0); + if (PREDICT_FALSE (ip0->ttl == 1)) + { + vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next[0] = NAT_NEXT_ICMP_ERROR; + goto trace0; + } - if (PREDICT_FALSE (ip0->ttl == 1)) - { - vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, - ICMP4_time_exceeded_ttl_exceeded_in_transit, - 0); - next0 = NAT44_ED_OUT2IN_NEXT_ICMP_ERROR; - goto trace00; - } + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + proto0 = ip_proto_to_nat_proto (ip0->protocol); - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; - proto0 = ip_proto_to_snat_proto (ip0->protocol); + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) + { + next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; + goto trace0; + } - if (is_slow_path) - { - if (PREDICT_FALSE (proto0 == ~0)) - { - s0 = - nat44_ed_out2in_unknown_proto (sm, b0, ip0, rx_fib_index0, - thread_index, now, vm, - node); - if (!sm->forwarding_enabled) - { - if (!s0) - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - goto trace00; - } - } + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) + { + next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; + goto trace0; + } - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = icmp_out2in_ed_slow_path - (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, - next0, now, thread_index, &s0); - goto trace00; - } - } - else + init_ed_k (&kv0, ip0->dst_address, + vnet_buffer (b0)->ip.reass.l4_dst_port, ip0->src_address, + vnet_buffer (b0)->ip.reass.l4_src_port, rx_fib_index0, + ip0->protocol); + + /* there is a stashed index in vnet_buffer2 from handoff node, + * see if we can use it */ + if (is_multi_worker + && + PREDICT_TRUE (!pool_is_free_index + (tsm->sessions, + vnet_buffer2 (b0)->nat.ed_out2in_nat_session_index))) + { + s0 = pool_elt_at_index (tsm->sessions, + vnet_buffer2 (b0)-> + nat.ed_out2in_nat_session_index); + if (PREDICT_TRUE + (s0->out2in.addr.as_u32 == ip0->dst_address.as_u32 + && s0->out2in.port == vnet_buffer (b0)->ip.reass.l4_dst_port + && s0->nat_proto == ip_proto_to_nat_proto (ip0->protocol) + && s0->out2in.fib_index == rx_fib_index0 + && s0->ext_host_addr.as_u32 == ip0->src_address.as_u32 + && s0->ext_host_port == + vnet_buffer (b0)->ip.reass.l4_src_port)) { - if (PREDICT_FALSE (proto0 == ~0)) - { - next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH; - goto trace00; - } - - if (ip4_is_fragment (ip0)) - { - next0 = NAT44_ED_OUT2IN_NEXT_REASS; - goto trace00; - } - - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH; - goto trace00; - } + /* yes, this is the droid we're looking for */ + goto skip_lookup; } + } - make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address, - ip0->protocol, rx_fib_index0, udp0->dst_port, - udp0->src_port); - - if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0)) - { - if (is_slow_path) - { - /* Try to match static mapping by external address and port, - destination address and port in packet */ - e_key0.addr = ip0->dst_address; - e_key0.port = udp0->dst_port; - e_key0.protocol = proto0; - e_key0.fib_index = rx_fib_index0; - if (snat_static_mapping_match (sm, e_key0, &l_key0, 1, 0, - &twice_nat0, &lb_nat0, - &ip0->src_address, - &identity_nat0)) - { - /* - * Send DHCP packets to the ipv4 stack, or we won't - * be able to use dhcp client on the outside interface - */ - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP - && (udp0->dst_port == - clib_host_to_net_u16 - (UDP_DST_PORT_dhcp_to_client)))) - { - vnet_feature_next (&next0, b0); - goto trace00; - } - - if (!sm->forwarding_enabled) - { - b0->error = - node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - } - else - { - if (next_src_nat (sm, ip0, ip0->protocol, - udp0->src_port, udp0->dst_port, - thread_index, rx_fib_index0)) - { - next0 = NAT44_ED_OUT2IN_NEXT_IN2OUT; - goto trace00; - } - create_bypass_for_fwd (sm, ip0, rx_fib_index0, - thread_index); - } - goto trace00; - } + // lookup for session + if (clib_bihash_search_16_8 (&sm->out2in_ed, &kv0, &value0)) + { + // session does not exist go slow path + next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; + goto trace0; + } + ASSERT (thread_index == ed_value_get_thread_index (&value0)); + s0 = + pool_elt_at_index (tsm->sessions, + ed_value_get_session_index (&value0)); - if (PREDICT_FALSE (identity_nat0)) - goto trace00; + skip_lookup: - if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0)) - { - b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN]; - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - goto trace00; - } - - /* Create session initiated by host from external network */ - s0 = create_session_for_static_mapping_ed (sm, b0, l_key0, - e_key0, node, - thread_index, - twice_nat0, - lb_nat0, now); + if (PREDICT_FALSE (per_vrf_sessions_is_expired (s0, thread_index))) + { + // session is closed, go slow path + nat_free_session_data (sm, s0, thread_index, 0); + nat_ed_session_delete (sm, s0, thread_index, 1); + next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; + goto trace0; + } - if (!s0) - { - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - goto trace00; - } - } - else - { - next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH; - goto trace00; - } + if (s0->tcp_closed_timestamp) + { + if (now >= s0->tcp_closed_timestamp) + { + // session is closed, go slow path, freed in slow path + next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; } else { - s0 = pool_elt_at_index (tsm->sessions, value0.value); + // session in transitory timeout, drop + b0->error = node->errors[NAT_OUT2IN_ED_ERROR_TCP_CLOSED]; + next[0] = NAT_NEXT_DROP; } + goto trace0; + } + + // drop if session expired + u64 sess_timeout_time; + sess_timeout_time = + s0->last_heard + (f64) nat44_session_get_timeout (sm, s0); + if (now >= sess_timeout_time) + { + // session is closed, go slow path + nat_free_session_data (sm, s0, thread_index, 0); + nat_ed_session_delete (sm, s0, thread_index, 1); + next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; + goto trace0; + } - old_addr0 = ip0->dst_address.as_u32; - new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32; - vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; + old_addr0 = ip0->dst_address.as_u32; + new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32; + vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - if (PREDICT_FALSE (is_twice_nat_session (s0))) - sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, - s0->ext_host_nat_addr.as_u32, ip4_header_t, - src_address); - ip0->checksum = ip_csum_fold (sum0); + sum0 = ip0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, + dst_address); + if (PREDICT_FALSE (is_twice_nat_session (s0))) + sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, + s0->ext_host_nat_addr.as_u32, ip4_header_t, + src_address); + ip0->checksum = ip_csum_fold (sum0); - if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) - { - old_port0 = tcp0->dst_port; - new_port0 = tcp0->dst_port = s0->in2out.port; + old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port; + if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) + { + new_port0 = udp0->dst_port = s0->in2out.port; sum0 = tcp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, - length); + sum0 = + ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, + dst_address); + sum0 = + ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, + length); if (is_twice_nat_session (s0)) { sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, s0->ext_host_nat_addr.as_u32, ip4_header_t, dst_address); - sum0 = ip_csum_update (sum0, tcp0->src_port, - s0->ext_host_nat_port, ip4_header_t, - length); + sum0 = + ip_csum_update (sum0, + vnet_buffer (b0)->ip.reass.l4_src_port, + s0->ext_host_nat_port, ip4_header_t, + length); tcp0->src_port = s0->ext_host_nat_port; ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; } tcp0->checksum = ip_csum_fold (sum0); - if (nat44_set_tcp_session_state_o2i - (sm, s0, tcp0, thread_index)) - goto trace00; } - else + vlib_increment_simple_counter (&sm->counters.fastpath.out2in_ed.tcp, + thread_index, sw_if_index0, 1); + nat44_set_tcp_session_state_o2i (sm, now, s0, + vnet_buffer (b0)->ip. + reass.icmp_type_or_tcp_flags, + vnet_buffer (b0)->ip. + reass.tcp_ack_number, + vnet_buffer (b0)->ip. + reass.tcp_seq_number, + thread_index); + } + else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment + && udp0->checksum) + { + new_port0 = udp0->dst_port = s0->in2out.port; + sum0 = udp0->checksum; + sum0 = + ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, + dst_address); + sum0 = + ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, length); + if (PREDICT_FALSE (is_twice_nat_session (s0))) { - udp0->dst_port = s0->in2out.port; - if (is_twice_nat_session (s0)) + sum0 = + ip_csum_update (sum0, ip0->src_address.as_u32, + s0->ext_host_nat_addr.as_u32, ip4_header_t, + dst_address); + sum0 = + ip_csum_update (sum0, vnet_buffer (b0)->ip.reass.l4_src_port, + s0->ext_host_nat_port, ip4_header_t, length); + udp0->src_port = s0->ext_host_nat_port; + ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; + } + udp0->checksum = ip_csum_fold (sum0); + vlib_increment_simple_counter (&sm->counters.fastpath.out2in_ed.udp, + thread_index, sw_if_index0, 1); + } + else + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) + { + new_port0 = udp0->dst_port = s0->in2out.port; + if (PREDICT_FALSE (is_twice_nat_session (s0))) { udp0->src_port = s0->ext_host_nat_port; ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; } - udp0->checksum = 0; - } - - /* Accounting */ - nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain (vm, - b0)); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s0, thread_index); - - trace00: - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - nat44_ed_out2in_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->is_slow_path = is_slow_path; - t->sw_if_index = sw_if_index0; - t->next_index = next0; - t->session_index = ~0; - if (s0) - t->session_index = s0 - tsm->sessions; } + vlib_increment_simple_counter (&sm->counters.fastpath.out2in_ed.udp, + thread_index, sw_if_index0, 1); + } - pkts_processed += next0 != NAT44_ED_OUT2IN_NEXT_DROP; - - next1 = NAT44_ED_OUT2IN_NEXT_LOOKUP; - vnet_buffer (b1)->snat.flags = 0; - ip1 = vlib_buffer_get_current (b1); - - sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX]; - rx_fib_index1 = - fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, - sw_if_index1); - - if (PREDICT_FALSE (ip1->ttl == 1)) - { - vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded, - ICMP4_time_exceeded_ttl_exceeded_in_transit, - 0); - next1 = NAT44_ED_OUT2IN_NEXT_ICMP_ERROR; - goto trace01; - } - - udp1 = ip4_next_header (ip1); - tcp1 = (tcp_header_t *) udp1; - icmp1 = (icmp46_header_t *) udp1; - proto1 = ip_proto_to_snat_proto (ip1->protocol); - - if (is_slow_path) - { - if (PREDICT_FALSE (proto1 == ~0)) - { - s1 = - nat44_ed_out2in_unknown_proto (sm, b1, ip1, rx_fib_index1, - thread_index, now, vm, - node); - if (!sm->forwarding_enabled) - { - if (!s1) - next1 = NAT44_ED_OUT2IN_NEXT_DROP; - goto trace01; - } - } + /* Accounting */ + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (vm, b0), + thread_index); + /* Per-user LRU list maintenance */ + nat44_session_update_lru (sm, s0, thread_index); - if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP)) - { - next1 = icmp_out2in_ed_slow_path - (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node, - next1, now, thread_index, &s1); - goto trace01; - } - } + trace0: + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + nat44_ed_out2in_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next[0]; + t->is_slow_path = 0; + + if (s0) + t->session_index = s0 - tsm->sessions; else - { - if (PREDICT_FALSE (proto1 == ~0)) - { - next1 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH; - goto trace01; - } + t->session_index = ~0; + } - if (ip4_is_fragment (ip1)) - { - next1 = NAT44_ED_OUT2IN_NEXT_REASS; - goto trace01; - } + if (next[0] == NAT_NEXT_DROP) + { + vlib_increment_simple_counter (&sm->counters.fastpath. + out2in_ed.drops, thread_index, + sw_if_index0, 1); + } - if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP)) - { - next1 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH; - goto trace01; - } - } + n_left_from--; + next++; + } - make_ed_kv (&kv1, &ip1->dst_address, &ip1->src_address, - ip1->protocol, rx_fib_index1, udp1->dst_port, - udp1->src_port); + vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts, + frame->n_vectors); + return frame->n_vectors; +} - if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv1, &value1)) - { - if (is_slow_path) - { - /* Try to match static mapping by external address and port, - destination address and port in packet */ - e_key1.addr = ip1->dst_address; - e_key1.port = udp1->dst_port; - e_key1.protocol = proto1; - e_key1.fib_index = rx_fib_index1; - if (snat_static_mapping_match (sm, e_key1, &l_key1, 1, 0, - &twice_nat1, &lb_nat1, - &ip1->src_address, - &identity_nat1)) - { - /* - * Send DHCP packets to the ipv4 stack, or we won't - * be able to use dhcp client on the outside interface - */ - if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_UDP - && (udp1->dst_port == - clib_host_to_net_u16 - (UDP_DST_PORT_dhcp_to_client)))) - { - vnet_feature_next (&next1, b1); - goto trace01; - } - - if (!sm->forwarding_enabled) - { - b1->error = - node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; - next1 = NAT44_ED_OUT2IN_NEXT_DROP; - } - else - { - if (next_src_nat (sm, ip1, ip1->protocol, - udp1->src_port, udp1->dst_port, - thread_index, rx_fib_index1)) - { - next1 = NAT44_ED_OUT2IN_NEXT_IN2OUT; - goto trace01; - } - create_bypass_for_fwd (sm, ip1, rx_fib_index1, - thread_index); - } - goto trace01; - } +static inline uword +nat44_ed_out2in_slow_path_node_fn_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + u32 n_left_from, *from; + snat_main_t *sm = &snat_main; + f64 now = vlib_time_now (vm); + u32 thread_index = vm->thread_index; + snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; + snat_static_mapping_t *m; - if (PREDICT_FALSE (identity_nat1)) - goto trace01; + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; - if ((proto1 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp1)) - { - b1->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN]; - next1 = NAT44_ED_OUT2IN_NEXT_DROP; - goto trace01; - } + vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; + u16 nexts[VLIB_FRAME_SIZE], *next = nexts; + vlib_get_buffers (vm, from, b, n_left_from); - /* Create session initiated by host from external network */ - s1 = create_session_for_static_mapping_ed (sm, b1, l_key1, - e_key1, node, - thread_index, - twice_nat1, - lb_nat1, now); + while (n_left_from > 0) + { + vlib_buffer_t *b0; + u32 sw_if_index0, rx_fib_index0, proto0, old_addr0, new_addr0; + u16 old_port0, new_port0; + ip4_header_t *ip0; + udp_header_t *udp0; + tcp_header_t *tcp0; + icmp46_header_t *icmp0; + snat_session_t *s0 = 0; + clib_bihash_kv_16_8_t kv0, value0; + ip_csum_t sum0; + lb_nat_type_t lb_nat0; + twice_nat_type_t twice_nat0; + u8 identity_nat0; + ip4_address_t sm_addr; + u16 sm_port; + u32 sm_fib_index; + + b0 = *b; + next[0] = vnet_buffer2 (b0)->nat.arc_next; + + vnet_buffer (b0)->snat.flags = 0; + ip0 = vlib_buffer_get_current (b0); + + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + rx_fib_index0 = + fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, sw_if_index0); + + if (PREDICT_FALSE (ip0->ttl == 1)) + { + vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next[0] = NAT_NEXT_ICMP_ERROR; + goto trace0; + } - if (!s1) - { - next1 = NAT44_ED_OUT2IN_NEXT_DROP; - goto trace01; - } - } - else - { - next1 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH; - goto trace01; - } - } - else + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + icmp0 = (icmp46_header_t *) udp0; + proto0 = ip_proto_to_nat_proto (ip0->protocol); + + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) + { + s0 = + nat44_ed_out2in_unknown_proto (sm, b0, ip0, rx_fib_index0, + thread_index, now, vm, node); + if (!sm->forwarding_enabled) { - s1 = pool_elt_at_index (tsm->sessions, value1.value); + if (!s0) + next[0] = NAT_NEXT_DROP; } + vlib_increment_simple_counter (&sm->counters.slowpath. + out2in_ed.other, thread_index, + sw_if_index0, 1); + goto trace0; + } - old_addr1 = ip1->dst_address.as_u32; - new_addr1 = ip1->dst_address.as_u32 = s1->in2out.addr.as_u32; - vnet_buffer (b1)->sw_if_index[VLIB_TX] = s1->in2out.fib_index; + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) + { + next[0] = icmp_out2in_ed_slow_path + (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, + next[0], now, thread_index, &s0); + vlib_increment_simple_counter (&sm->counters.slowpath. + out2in_ed.icmp, thread_index, + sw_if_index0, 1); + goto trace0; + } - sum1 = ip1->checksum; - sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t, - dst_address); - if (PREDICT_FALSE (is_twice_nat_session (s1))) - sum1 = ip_csum_update (sum1, ip1->src_address.as_u32, - s1->ext_host_nat_addr.as_u32, ip4_header_t, - src_address); - ip1->checksum = ip_csum_fold (sum1); + init_ed_k (&kv0, ip0->dst_address, + vnet_buffer (b0)->ip.reass.l4_dst_port, ip0->src_address, + vnet_buffer (b0)->ip.reass.l4_src_port, rx_fib_index0, + ip0->protocol); - if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP)) - { - old_port1 = tcp1->dst_port; - new_port1 = tcp1->dst_port = s1->in2out.port; - - sum1 = tcp1->checksum; - sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t, - dst_address); - sum1 = ip_csum_update (sum1, old_port1, new_port1, ip4_header_t, - length); - if (is_twice_nat_session (s1)) - { - sum1 = ip_csum_update (sum1, ip1->src_address.as_u32, - s1->ext_host_nat_addr.as_u32, - ip4_header_t, dst_address); - sum1 = ip_csum_update (sum1, tcp1->src_port, - s1->ext_host_nat_port, ip4_header_t, - length); - tcp1->src_port = s1->ext_host_nat_port; - ip1->src_address.as_u32 = s1->ext_host_nat_addr.as_u32; - } - tcp1->checksum = ip_csum_fold (sum1); - if (nat44_set_tcp_session_state_o2i - (sm, s1, tcp1, thread_index)) - goto trace01; - } - else - { - udp1->dst_port = s1->in2out.port; - if (is_twice_nat_session (s1)) - { - udp1->src_port = s1->ext_host_nat_port; - ip1->src_address.as_u32 = s1->ext_host_nat_addr.as_u32; - } - udp1->checksum = 0; - } - - /* Accounting */ - nat44_session_update_counters (s1, now, - vlib_buffer_length_in_chain (vm, - b1)); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s1, thread_index); + s0 = NULL; + if (!clib_bihash_search_16_8 (&sm->out2in_ed, &kv0, &value0)) + { + ASSERT (thread_index == ed_value_get_thread_index (&value0)); + s0 = + pool_elt_at_index (tsm->sessions, + ed_value_get_session_index (&value0)); - trace01: - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b1->flags & VLIB_BUFFER_IS_TRACED))) + if (s0->tcp_closed_timestamp && now >= s0->tcp_closed_timestamp) { - nat44_ed_out2in_trace_t *t = - vlib_add_trace (vm, node, b1, sizeof (*t)); - t->is_slow_path = is_slow_path; - t->sw_if_index = sw_if_index1; - t->next_index = next1; - t->session_index = ~0; - if (s1) - t->session_index = s1 - tsm->sessions; + nat_free_session_data (sm, s0, thread_index, 0); + nat_ed_session_delete (sm, s0, thread_index, 1); + s0 = NULL; } - - pkts_processed += next1 != NAT44_ED_OUT2IN_NEXT_DROP; - - /* verify speculative enqueues, maybe switch current next frame */ - vlib_validate_buffer_enqueue_x2 (vm, node, next_index, - to_next, n_left_to_next, - bi0, bi1, next0, next1); } - while (n_left_from > 0 && n_left_to_next > 0) + if (!s0) { - u32 bi0; - vlib_buffer_t *b0; - u32 next0, sw_if_index0, rx_fib_index0, proto0, old_addr0, - new_addr0; - u16 old_port0, new_port0; - ip4_header_t *ip0; - udp_header_t *udp0; - tcp_header_t *tcp0; - icmp46_header_t *icmp0; - snat_session_t *s0 = 0; - clib_bihash_kv_16_8_t kv0, value0; - ip_csum_t sum0; - snat_session_key_t e_key0, l_key0; - lb_nat_type_t lb_nat0; - twice_nat_type_t twice_nat0; - u8 identity_nat0; - - /* speculatively enqueue b0 to the current next frame */ - bi0 = from[0]; - to_next[0] = bi0; - from += 1; - to_next += 1; - n_left_from -= 1; - n_left_to_next -= 1; - - b0 = vlib_get_buffer (vm, bi0); - next0 = NAT44_ED_OUT2IN_NEXT_LOOKUP; - vnet_buffer (b0)->snat.flags = 0; - ip0 = vlib_buffer_get_current (b0); - - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - rx_fib_index0 = - fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, - sw_if_index0); - - if (PREDICT_FALSE (ip0->ttl == 1)) - { - vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, - ICMP4_time_exceeded_ttl_exceeded_in_transit, - 0); - next0 = NAT44_ED_OUT2IN_NEXT_ICMP_ERROR; - goto trace0; - } - - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; - proto0 = ip_proto_to_snat_proto (ip0->protocol); - - if (is_slow_path) - { - if (PREDICT_FALSE (proto0 == ~0)) - { - s0 = - nat44_ed_out2in_unknown_proto (sm, b0, ip0, rx_fib_index0, - thread_index, now, vm, - node); - if (!sm->forwarding_enabled) - { - if (!s0) - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - goto trace0; - } - } - - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = icmp_out2in_ed_slow_path - (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, - next0, now, thread_index, &s0); - goto trace0; - } - } - else + /* Try to match static mapping by external address and port, + destination address and port in packet */ + + if (snat_static_mapping_match + (sm, ip0->dst_address, + vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, + proto0, &sm_addr, &sm_port, &sm_fib_index, 1, 0, + &twice_nat0, &lb_nat0, &ip0->src_address, &identity_nat0, &m)) { - if (PREDICT_FALSE (proto0 == ~0)) + /* + * Send DHCP packets to the ipv4 stack, or we won't + * be able to use dhcp client on the outside interface + */ + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_UDP + && (vnet_buffer (b0)->ip.reass.l4_dst_port == + clib_host_to_net_u16 + (UDP_DST_PORT_dhcp_to_client)))) { - next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH; goto trace0; } - if (ip4_is_fragment (ip0)) + if (!sm->forwarding_enabled) { - next0 = NAT44_ED_OUT2IN_NEXT_REASS; - goto trace0; + b0->error = + node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; + next[0] = NAT_NEXT_DROP; } - - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH; - goto trace0; - } - } - - make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address, - ip0->protocol, rx_fib_index0, udp0->dst_port, - udp0->src_port); - - if (clib_bihash_search_16_8 (&tsm->out2in_ed, &kv0, &value0)) - { - if (is_slow_path) + else { - /* Try to match static mapping by external address and port, - destination address and port in packet */ - e_key0.addr = ip0->dst_address; - e_key0.port = udp0->dst_port; - e_key0.protocol = proto0; - e_key0.fib_index = rx_fib_index0; - if (snat_static_mapping_match (sm, e_key0, &l_key0, 1, 0, - &twice_nat0, &lb_nat0, - &ip0->src_address, - &identity_nat0)) + if (next_src_nat + (sm, ip0, vnet_buffer (b0)->ip.reass.l4_src_port, + vnet_buffer (b0)->ip.reass.l4_dst_port, + thread_index, rx_fib_index0)) { - /* - * Send DHCP packets to the ipv4 stack, or we won't - * be able to use dhcp client on the outside interface - */ - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP - && (udp0->dst_port == - clib_host_to_net_u16 - (UDP_DST_PORT_dhcp_to_client)))) - { - vnet_feature_next (&next0, b0); - goto trace0; - } - - if (!sm->forwarding_enabled) - { - b0->error = - node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - } - else - { - if (next_src_nat (sm, ip0, ip0->protocol, - udp0->src_port, udp0->dst_port, - thread_index, rx_fib_index0)) - { - next0 = NAT44_ED_OUT2IN_NEXT_IN2OUT; - goto trace0; - } - create_bypass_for_fwd (sm, ip0, rx_fib_index0, - thread_index); - } - goto trace0; + next[0] = NAT_NEXT_IN2OUT_ED_FAST_PATH; } - - if (PREDICT_FALSE (identity_nat0)) - goto trace0; - - if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0)) + else { - b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN]; - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - goto trace0; + if (sm->num_workers > 1) + create_bypass_for_fwd_worker (sm, b0, ip0, + rx_fib_index0); + else + create_bypass_for_fwd (sm, b0, ip0, rx_fib_index0, + thread_index); } + } + goto trace0; + } - /* Create session initiated by host from external network */ - s0 = create_session_for_static_mapping_ed (sm, b0, l_key0, - e_key0, node, - thread_index, - twice_nat0, - lb_nat0, now); + if (PREDICT_FALSE (identity_nat0)) + goto trace0; - if (!s0) - { - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - goto trace0; - } - } - else - { - next0 = NAT44_ED_OUT2IN_NEXT_SLOW_PATH; - goto trace0; - } + if ((proto0 == NAT_PROTOCOL_TCP) + && !tcp_flags_is_init (vnet_buffer (b0)->ip. + reass.icmp_type_or_tcp_flags)) + { + b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN]; + next[0] = NAT_NEXT_DROP; + goto trace0; } - else + + /* Create session initiated by host from external network */ + s0 = create_session_for_static_mapping_ed (sm, b0, + sm_addr, sm_port, + sm_fib_index, + ip0->dst_address, + vnet_buffer (b0)-> + ip.reass.l4_dst_port, + rx_fib_index0, proto0, + node, rx_fib_index0, + thread_index, twice_nat0, + lb_nat0, now, m); + if (!s0) { - s0 = pool_elt_at_index (tsm->sessions, value0.value); + next[0] = NAT_NEXT_DROP; + goto trace0; } + } - old_addr0 = ip0->dst_address.as_u32; - new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32; - vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; + old_addr0 = ip0->dst_address.as_u32; + new_addr0 = ip0->dst_address.as_u32 = s0->in2out.addr.as_u32; + vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - if (PREDICT_FALSE (is_twice_nat_session (s0))) - sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, - s0->ext_host_nat_addr.as_u32, ip4_header_t, - src_address); - ip0->checksum = ip_csum_fold (sum0); + sum0 = ip0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, + dst_address); + if (PREDICT_FALSE (is_twice_nat_session (s0))) + sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, + s0->ext_host_nat_addr.as_u32, ip4_header_t, + src_address); + ip0->checksum = ip_csum_fold (sum0); - if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) - { - old_port0 = tcp0->dst_port; - new_port0 = tcp0->dst_port = s0->in2out.port; + old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port; + if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) + { + new_port0 = udp0->dst_port = s0->in2out.port; sum0 = tcp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - dst_address); - sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, - length); + sum0 = + ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, + dst_address); + sum0 = + ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, + length); if (is_twice_nat_session (s0)) { sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, s0->ext_host_nat_addr.as_u32, ip4_header_t, dst_address); - sum0 = ip_csum_update (sum0, tcp0->src_port, - s0->ext_host_nat_port, ip4_header_t, - length); + sum0 = + ip_csum_update (sum0, + vnet_buffer (b0)->ip.reass.l4_src_port, + s0->ext_host_nat_port, ip4_header_t, + length); tcp0->src_port = s0->ext_host_nat_port; ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; } tcp0->checksum = ip_csum_fold (sum0); - if (nat44_set_tcp_session_state_o2i - (sm, s0, tcp0, thread_index)) - goto trace0; } - else + vlib_increment_simple_counter (&sm->counters.slowpath.out2in_ed.tcp, + thread_index, sw_if_index0, 1); + nat44_set_tcp_session_state_o2i (sm, now, s0, + vnet_buffer (b0)->ip. + reass.icmp_type_or_tcp_flags, + vnet_buffer (b0)->ip. + reass.tcp_ack_number, + vnet_buffer (b0)->ip. + reass.tcp_seq_number, + thread_index); + } + else if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment + && udp0->checksum) + { + new_port0 = udp0->dst_port = s0->in2out.port; + sum0 = udp0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, + dst_address); + sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, + length); + if (PREDICT_FALSE (is_twice_nat_session (s0))) { - udp0->dst_port = s0->in2out.port; - if (is_twice_nat_session (s0)) + sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, + s0->ext_host_nat_addr.as_u32, + ip4_header_t, dst_address); + sum0 = + ip_csum_update (sum0, + vnet_buffer (b0)->ip.reass.l4_src_port, + s0->ext_host_nat_port, ip4_header_t, length); + udp0->src_port = s0->ext_host_nat_port; + ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; + } + udp0->checksum = ip_csum_fold (sum0); + vlib_increment_simple_counter (&sm->counters.slowpath.out2in_ed.udp, + thread_index, sw_if_index0, 1); + } + else + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) + { + new_port0 = udp0->dst_port = s0->in2out.port; + if (PREDICT_FALSE (is_twice_nat_session (s0))) { udp0->src_port = s0->ext_host_nat_port; ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; } - udp0->checksum = 0; } + vlib_increment_simple_counter (&sm->counters.slowpath.out2in_ed.udp, + thread_index, sw_if_index0, 1); + } - /* Accounting */ - nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain (vm, - b0)); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s0, thread_index); + /* Accounting */ + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (vm, b0), + thread_index); + /* Per-user LRU list maintenance */ + nat44_session_update_lru (sm, s0, thread_index); - trace0: - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - nat44_ed_out2in_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->is_slow_path = is_slow_path; - t->sw_if_index = sw_if_index0; - t->next_index = next0; - t->session_index = ~0; - if (s0) - t->session_index = s0 - tsm->sessions; - } + trace0: + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + nat44_ed_out2in_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next[0]; + t->is_slow_path = 1; + + if (s0) + t->session_index = s0 - tsm->sessions; + else + t->session_index = ~0; + } - pkts_processed += next0 != NAT44_ED_OUT2IN_NEXT_DROP; - /* verify speculative enqueue, maybe switch current next frame */ - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, - to_next, n_left_to_next, - bi0, next0); + if (next[0] == NAT_NEXT_DROP) + { + vlib_increment_simple_counter (&sm->counters.slowpath. + out2in_ed.drops, thread_index, + sw_if_index0, 1); } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); + n_left_from--; + next++; + b++; } - vlib_node_increment_counter (vm, stats_node_index, - NAT_OUT2IN_ED_ERROR_OUT2IN_PACKETS, - pkts_processed); + vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts, + frame->n_vectors); + return frame->n_vectors; } -static uword -nat44_ed_out2in_fast_path_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) +VLIB_NODE_FN (nat44_ed_out2in_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) { - return nat44_ed_out2in_node_fn_inline (vm, node, frame, 0); + if (snat_main.num_workers > 1) + { + return nat44_ed_out2in_fast_path_node_fn_inline (vm, node, frame, 1); + } + else + { + return nat44_ed_out2in_fast_path_node_fn_inline (vm, node, frame, 0); + } } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (nat44_ed_out2in_node) = { - .function = nat44_ed_out2in_fast_path_fn, .name = "nat44-ed-out2in", .vector_size = sizeof (u32), + .sibling_of = "nat-default", .format_trace = format_nat44_ed_out2in_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN(nat_out2in_ed_error_strings), .error_strings = nat_out2in_ed_error_strings, .runtime_data_bytes = sizeof (snat_runtime_t), - .n_next_nodes = NAT44_ED_OUT2IN_N_NEXT, - .next_nodes = { - [NAT44_ED_OUT2IN_NEXT_DROP] = "error-drop", - [NAT44_ED_OUT2IN_NEXT_LOOKUP] = "ip4-lookup", - [NAT44_ED_OUT2IN_NEXT_SLOW_PATH] = "nat44-ed-out2in-slowpath", - [NAT44_ED_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error", - [NAT44_ED_OUT2IN_NEXT_IN2OUT] = "nat44-ed-in2out", - [NAT44_ED_OUT2IN_NEXT_REASS] = "nat44-ed-out2in-reass", - }, }; /* *INDENT-ON* */ -VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_out2in_node, - nat44_ed_out2in_fast_path_fn); - -static uword -nat44_ed_out2in_slow_path_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) +VLIB_NODE_FN (nat44_ed_out2in_slowpath_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) { - return nat44_ed_out2in_node_fn_inline (vm, node, frame, 1); + return nat44_ed_out2in_slow_path_node_fn_inline (vm, node, frame); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (nat44_ed_out2in_slowpath_node) = { - .function = nat44_ed_out2in_slow_path_fn, .name = "nat44-ed-out2in-slowpath", .vector_size = sizeof (u32), + .sibling_of = "nat-default", .format_trace = format_nat44_ed_out2in_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN(nat_out2in_ed_error_strings), .error_strings = nat_out2in_ed_error_strings, .runtime_data_bytes = sizeof (snat_runtime_t), - .n_next_nodes = NAT44_ED_OUT2IN_N_NEXT, - .next_nodes = { - [NAT44_ED_OUT2IN_NEXT_DROP] = "error-drop", - [NAT44_ED_OUT2IN_NEXT_LOOKUP] = "ip4-lookup", - [NAT44_ED_OUT2IN_NEXT_SLOW_PATH] = "nat44-ed-out2in-slowpath", - [NAT44_ED_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error", - [NAT44_ED_OUT2IN_NEXT_IN2OUT] = "nat44-ed-in2out", - [NAT44_ED_OUT2IN_NEXT_REASS] = "nat44-ed-out2in-reass", - }, }; /* *INDENT-ON* */ -VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_out2in_slowpath_node, - nat44_ed_out2in_slow_path_fn); - -static uword -nat44_ed_out2in_reass_node_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) +static u8 * +format_nat_pre_trace (u8 * s, va_list * args) { - u32 n_left_from, *from, *to_next; - nat44_ed_out2in_next_t next_index; - u32 pkts_processed = 0; - snat_main_t *sm = &snat_main; - f64 now = vlib_time_now (vm); - u32 thread_index = vm->thread_index; - snat_main_per_thread_data_t *per_thread_data = - &sm->per_thread_data[thread_index]; - u32 *fragments_to_drop = 0; - u32 *fragments_to_loopback = 0; - - from = vlib_frame_vector_args (frame); - n_left_from = frame->n_vectors; - next_index = node->cached_next_index; - - while (n_left_from > 0) - { - u32 n_left_to_next; - - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - - while (n_left_from > 0 && n_left_to_next > 0) - { - u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0; - vlib_buffer_t *b0; - u32 next0; - u8 cached0 = 0; - ip4_header_t *ip0; - nat_reass_ip4_t *reass0; - udp_header_t *udp0; - tcp_header_t *tcp0; - icmp46_header_t *icmp0; - clib_bihash_kv_16_8_t kv0, value0; - snat_session_t *s0 = 0; - u16 old_port0, new_port0; - ip_csum_t sum0; - snat_session_key_t e_key0, l_key0; - lb_nat_type_t lb0; - twice_nat_type_t twice_nat0; - u8 identity_nat0; - - /* speculatively enqueue b0 to the current next frame */ - bi0 = from[0]; - to_next[0] = bi0; - from += 1; - to_next += 1; - n_left_from -= 1; - n_left_to_next -= 1; - - b0 = vlib_get_buffer (vm, bi0); - next0 = NAT44_ED_OUT2IN_NEXT_LOOKUP; - - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - rx_fib_index0 = - fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, - sw_if_index0); - - if (PREDICT_FALSE (nat_reass_is_drop_frag (0))) - { - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - b0->error = node->errors[NAT_OUT2IN_ED_ERROR_DROP_FRAGMENT]; - goto trace0; - } - - ip0 = (ip4_header_t *) vlib_buffer_get_current (b0); - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; - proto0 = ip_proto_to_snat_proto (ip0->protocol); - - reass0 = nat_ip4_reass_find_or_create (ip0->src_address, - ip0->dst_address, - ip0->fragment_id, - ip0->protocol, - 1, &fragments_to_drop); - - if (PREDICT_FALSE (!reass0)) - { - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - b0->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_REASS]; - nat_log_notice ("maximum reassemblies exceeded"); - goto trace0; - } - - if (PREDICT_FALSE (ip4_is_first_fragment (ip0))) - { - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = icmp_out2in_ed_slow_path - (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, - next0, now, thread_index, &s0); - - if (PREDICT_TRUE (next0 != NAT44_ED_OUT2IN_NEXT_DROP)) - { - if (s0) - reass0->sess_index = s0 - per_thread_data->sessions; - else - reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE; - reass0->thread_index = thread_index; - nat_ip4_reass_get_frags (reass0, - &fragments_to_loopback); - } - - goto trace0; - } - - make_ed_kv (&kv0, &ip0->dst_address, &ip0->src_address, - ip0->protocol, rx_fib_index0, udp0->dst_port, - udp0->src_port); - - if (clib_bihash_search_16_8 - (&per_thread_data->out2in_ed, &kv0, &value0)) - { - /* Try to match static mapping by external address and port, - destination address and port in packet */ - e_key0.addr = ip0->dst_address; - e_key0.port = udp0->dst_port; - e_key0.protocol = proto0; - e_key0.fib_index = rx_fib_index0; - if (snat_static_mapping_match (sm, e_key0, &l_key0, 1, 0, - &twice_nat0, &lb0, 0, - &identity_nat0)) - { - /* - * Send DHCP packets to the ipv4 stack, or we won't - * be able to use dhcp client on the outside interface - */ - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_UDP - && (udp0->dst_port - == - clib_host_to_net_u16 - (UDP_DST_PORT_dhcp_to_client)))) - { - vnet_feature_next (&next0, b0); - goto trace0; - } - - if (!sm->forwarding_enabled) - { - b0->error = - node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - } - else - { - if (next_src_nat (sm, ip0, ip0->protocol, - udp0->src_port, udp0->dst_port, - thread_index, rx_fib_index0)) - { - next0 = NAT44_ED_OUT2IN_NEXT_IN2OUT; - goto trace0; - } - create_bypass_for_fwd (sm, ip0, rx_fib_index0, - thread_index); - reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE; - nat_ip4_reass_get_frags (reass0, - &fragments_to_loopback); - } - goto trace0; - } - - if (PREDICT_FALSE (identity_nat0)) - { - reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE; - goto trace0; - } - - if ((proto0 == SNAT_PROTOCOL_TCP) && !tcp_is_init (tcp0)) - { - b0->error = node->errors[NAT_OUT2IN_ED_ERROR_NON_SYN]; - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - goto trace0; - } - - /* Create session initiated by host from external network */ - s0 = create_session_for_static_mapping_ed (sm, b0, l_key0, - e_key0, node, - thread_index, - twice_nat0, lb0, - now); - if (!s0) - { - b0->error = - node->errors[NAT_OUT2IN_ED_ERROR_NO_TRANSLATION]; - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - goto trace0; - } - reass0->sess_index = s0 - per_thread_data->sessions; - reass0->thread_index = thread_index; - } - else - { - s0 = pool_elt_at_index (per_thread_data->sessions, - value0.value); - reass0->sess_index = value0.value; - } - nat_ip4_reass_get_frags (reass0, &fragments_to_loopback); - } - else - { - if (reass0->flags & NAT_REASS_FLAG_ED_DONT_TRANSLATE) - goto trace0; - if (PREDICT_FALSE (reass0->sess_index == (u32) ~ 0)) - { - if (nat_ip4_reass_add_fragment - (reass0, bi0, &fragments_to_drop)) - { - b0->error = node->errors[NAT_OUT2IN_ED_ERROR_MAX_FRAG]; - nat_log_notice - ("maximum fragments per reassembly exceeded"); - next0 = NAT44_ED_OUT2IN_NEXT_DROP; - goto trace0; - } - cached0 = 1; - goto trace0; - } - s0 = pool_elt_at_index (per_thread_data->sessions, - reass0->sess_index); - } - - old_addr0 = ip0->dst_address.as_u32; - ip0->dst_address = s0->in2out.addr; - new_addr0 = ip0->dst_address.as_u32; - vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index; - - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */ ); - if (PREDICT_FALSE (is_twice_nat_session (s0))) - sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, - s0->ext_host_nat_addr.as_u32, ip4_header_t, - src_address); - ip0->checksum = ip_csum_fold (sum0); - - if (PREDICT_FALSE (ip4_is_first_fragment (ip0))) - { - if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) - { - old_port0 = tcp0->dst_port; - tcp0->dst_port = s0->in2out.port; - new_port0 = tcp0->dst_port; - - sum0 = tcp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */ ); - - sum0 = ip_csum_update (sum0, old_port0, new_port0, - ip4_header_t /* cheat */ , - length /* changed member */ ); - if (is_twice_nat_session (s0)) - { - sum0 = ip_csum_update (sum0, ip0->src_address.as_u32, - s0->ext_host_nat_addr.as_u32, - ip4_header_t, dst_address); - sum0 = ip_csum_update (sum0, tcp0->src_port, - s0->ext_host_nat_port, - ip4_header_t, length); - tcp0->src_port = s0->ext_host_nat_port; - ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; - } - tcp0->checksum = ip_csum_fold (sum0); - } - else - { - old_port0 = udp0->dst_port; - udp0->dst_port = s0->in2out.port; - if (is_twice_nat_session (s0)) - { - udp0->src_port = s0->ext_host_nat_port; - ip0->src_address.as_u32 = s0->ext_host_nat_addr.as_u32; - } - udp0->checksum = 0; - } - } - - /* Accounting */ - nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain (vm, - b0)); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s0, thread_index); - - trace0: - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - nat44_reass_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->cached = cached0; - t->sw_if_index = sw_if_index0; - t->next_index = next0; - } - - if (cached0) - { - n_left_to_next++; - to_next--; - } - else - { - pkts_processed += next0 != NAT44_ED_OUT2IN_NEXT_DROP; - - /* verify speculative enqueue, maybe switch current next frame */ - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, - to_next, n_left_to_next, - bi0, next0); - } - - if (n_left_from == 0 && vec_len (fragments_to_loopback)) - { - from = vlib_frame_vector_args (frame); - u32 len = vec_len (fragments_to_loopback); - if (len <= VLIB_FRAME_SIZE) - { - clib_memcpy_fast (from, fragments_to_loopback, - sizeof (u32) * len); - n_left_from = len; - vec_reset_length (fragments_to_loopback); - } - else - { - clib_memcpy_fast (from, fragments_to_loopback + - (len - VLIB_FRAME_SIZE), - sizeof (u32) * VLIB_FRAME_SIZE); - n_left_from = VLIB_FRAME_SIZE; - _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE; - } - } - } - - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - } - - vlib_node_increment_counter (vm, nat44_ed_out2in_reass_node.index, - NAT_OUT2IN_ED_ERROR_OUT2IN_PACKETS, - pkts_processed); - - nat_send_all_to_node (vm, fragments_to_drop, node, - &node->errors[NAT_OUT2IN_ED_ERROR_DROP_FRAGMENT], - NAT44_ED_OUT2IN_NEXT_DROP); + CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); + CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); + nat_pre_trace_t *t = va_arg (*args, nat_pre_trace_t *); + return format (s, "out2in next_index %d arc_next_index %d", t->next_index, + t->arc_next_index); +} - vec_free (fragments_to_drop); - vec_free (fragments_to_loopback); - return frame->n_vectors; +VLIB_NODE_FN (nat_pre_out2in_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return nat_pre_node_fn_inline (vm, node, frame, + NAT_NEXT_OUT2IN_ED_FAST_PATH); } /* *INDENT-OFF* */ -VLIB_REGISTER_NODE (nat44_ed_out2in_reass_node) = { - .function = nat44_ed_out2in_reass_node_fn, - .name = "nat44-ed-out2in-reass", +VLIB_REGISTER_NODE (nat_pre_out2in_node) = { + .name = "nat-pre-out2in", .vector_size = sizeof (u32), - .format_trace = format_nat44_reass_trace, + .sibling_of = "nat-default", + .format_trace = format_nat_pre_trace, .type = VLIB_NODE_TYPE_INTERNAL, - .n_errors = ARRAY_LEN(nat_out2in_ed_error_strings), - .error_strings = nat_out2in_ed_error_strings, - .n_next_nodes = NAT44_ED_OUT2IN_N_NEXT, - .next_nodes = { - [NAT44_ED_OUT2IN_NEXT_DROP] = "error-drop", - [NAT44_ED_OUT2IN_NEXT_LOOKUP] = "ip4-lookup", - [NAT44_ED_OUT2IN_NEXT_SLOW_PATH] = "nat44-ed-out2in-slowpath", - [NAT44_ED_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error", - [NAT44_ED_OUT2IN_NEXT_IN2OUT] = "nat44-ed-in2out", - [NAT44_ED_OUT2IN_NEXT_REASS] = "nat44-ed-out2in-reass", - }, -}; + .n_errors = 0, + }; /* *INDENT-ON* */ -VLIB_NODE_FUNCTION_MULTIARCH (nat44_ed_out2in_reass_node, - nat44_ed_out2in_reass_node_fn); - /* * fd.io coding-style-patch-verification: ON *