X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fnat%2Fout2in.c;h=c17f0e233d613ce63de6993a510115df27aa1efb;hb=6484f4b9c;hp=9549a45c07ebaab1aafcabecf04c9d69e4bde860;hpb=9654a37fac7fe2b425576eb0237b8d24ae44e1b1;p=vpp.git diff --git a/src/plugins/nat/out2in.c b/src/plugins/nat/out2in.c old mode 100755 new mode 100644 index 9549a45c07e..c17f0e233d6 --- a/src/plugins/nat/out2in.c +++ b/src/plugins/nat/out2in.c @@ -27,8 +27,8 @@ #include #include #include -#include #include +#include #include #include @@ -72,21 +72,11 @@ format_snat_out2in_fast_trace (u8 * s, va_list * args) #define foreach_snat_out2in_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")\ -_(TCP_PACKETS, "TCP packets") \ -_(UDP_PACKETS, "UDP packets") \ -_(ICMP_PACKETS, "ICMP packets") \ -_(OTHER_PACKETS, "other protocol packets") \ -_(FRAGMENTS, "fragments") \ -_(CACHED_FRAGMENTS, "cached fragments") \ -_(PROCESSED_FRAGMENTS, "processed fragments") +_(CANNOT_CREATE_USER, "cannot create NAT user") typedef enum { @@ -107,7 +97,6 @@ typedef enum SNAT_OUT2IN_NEXT_DROP, SNAT_OUT2IN_NEXT_LOOKUP, SNAT_OUT2IN_NEXT_ICMP_ERROR, - SNAT_OUT2IN_NEXT_REASS, SNAT_OUT2IN_N_NEXT, } snat_out2in_next_t; @@ -127,30 +116,30 @@ nat44_o2i_is_idle_session_cb (clib_bihash_kv_8_8_t * kv, void *arg) sess_timeout_time = s->last_heard + (f64) nat44_session_get_timeout (sm, s); if (ctx->now >= sess_timeout_time) { - s_kv.key = s->in2out.as_u64; + init_nat_i2o_k (&s_kv, s); if (clib_bihash_add_del_8_8 (&tsm->in2out, &s_kv, 0)) nat_elog_warn ("out2in key del failed"); snat_ipfix_logging_nat44_ses_delete (ctx->thread_index, s->in2out.addr.as_u32, s->out2in.addr.as_u32, - s->in2out.protocol, + s->nat_proto, s->in2out.port, s->out2in.port, s->in2out.fib_index); nat_syslog_nat44_apmdel (s->user_index, s->in2out.fib_index, &s->in2out.addr, s->in2out.port, - &s->out2in.addr, s->out2in.port, - s->in2out.protocol); + &s->out2in.addr, s->out2in.port, s->nat_proto); nat_ha_sdel (&s->out2in.addr, s->out2in.port, &s->ext_host_addr, - s->ext_host_port, s->out2in.protocol, s->out2in.fib_index, + s->ext_host_port, s->nat_proto, s->out2in.fib_index, ctx->thread_index); if (!snat_is_session_static (s)) snat_free_outside_address_and_port (sm->addresses, ctx->thread_index, - &s->out2in); + &s->out2in.addr, s->out2in.port, + s->nat_proto); nat44_delete_session (sm, s, ctx->thread_index); return 1; @@ -177,8 +166,13 @@ nat44_o2i_is_idle_session_cb (clib_bihash_kv_8_8_t * kv, void *arg) static inline snat_session_t * create_session_for_static_mapping (snat_main_t * sm, vlib_buffer_t * b0, - snat_session_key_t in2out, - snat_session_key_t out2in, + 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 proto, vlib_node_runtime_t * node, u32 thread_index, f64 now) { @@ -189,7 +183,7 @@ create_session_for_static_mapping (snat_main_t * sm, udp_header_t *udp0; nat44_is_idle_session_ctx_t ctx0; - if (PREDICT_FALSE (maximum_sessions_exceeded (sm, thread_index))) + if (PREDICT_FALSE (nat44_maximum_sessions_exceeded (sm, thread_index))) { b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_SESSIONS_EXCEEDED]; nat_elog_notice ("maximum sessions exceeded"); @@ -199,11 +193,10 @@ create_session_for_static_mapping (snat_main_t * sm, ip0 = vlib_buffer_get_current (b0); udp0 = ip4_next_header (ip0); - u = - nat_user_get_or_create (sm, &in2out.addr, in2out.fib_index, thread_index); + u = nat_user_get_or_create (sm, &i2o_addr, i2o_fib_index, thread_index); if (!u) { - nat_elog_warn ("create NAT user failed"); + b0->error = node->errors[SNAT_OUT2IN_ERROR_CANNOT_CREATE_USER]; return 0; } @@ -219,22 +212,24 @@ create_session_for_static_mapping (snat_main_t * sm, s->ext_host_addr.as_u32 = ip0->src_address.as_u32; s->ext_host_port = udp0->src_port; user_session_increment (sm, u, 1 /* static */ ); - s->in2out = in2out; - s->out2in = out2in; - s->in2out.protocol = out2in.protocol; + s->in2out.addr = i2o_addr; + s->in2out.port = i2o_port; + s->in2out.fib_index = i2o_fib_index; + s->out2in.addr = o2i_addr; + s->out2in.port = o2i_port; + s->out2in.fib_index = o2i_fib_index; + s->nat_proto = proto; /* Add to translation hashes */ ctx0.now = now; ctx0.thread_index = thread_index; - kv0.key = s->in2out.as_u64; - kv0.value = s - sm->per_thread_data[thread_index].sessions; + init_nat_i2o_kv (&kv0, s, s - sm->per_thread_data[thread_index].sessions); if (clib_bihash_add_or_overwrite_stale_8_8 (&sm->per_thread_data[thread_index].in2out, &kv0, nat44_i2o_is_idle_session_cb, &ctx0)) nat_elog_notice ("in2out key add failed"); - kv0.key = s->out2in.as_u64; - + init_nat_o2i_kv (&kv0, s, s - sm->per_thread_data[thread_index].sessions); if (clib_bihash_add_or_overwrite_stale_8_8 (&sm->per_thread_data[thread_index].out2in, &kv0, nat44_o2i_is_idle_session_cb, &ctx0)) @@ -244,30 +239,28 @@ create_session_for_static_mapping (snat_main_t * sm, snat_ipfix_logging_nat44_ses_create (thread_index, s->in2out.addr.as_u32, s->out2in.addr.as_u32, - s->in2out.protocol, + s->nat_proto, s->in2out.port, s->out2in.port, s->in2out.fib_index); nat_syslog_nat44_apmadd (s->user_index, s->in2out.fib_index, &s->in2out.addr, s->in2out.port, &s->out2in.addr, - s->out2in.port, s->in2out.protocol); + s->out2in.port, s->nat_proto); nat_ha_sadd (&s->in2out.addr, s->in2out.port, &s->out2in.addr, s->out2in.port, &s->ext_host_addr, s->ext_host_port, &s->ext_host_nat_addr, s->ext_host_nat_port, - s->in2out.protocol, s->in2out.fib_index, s->flags, - thread_index, 0); + s->nat_proto, s->in2out.fib_index, s->flags, thread_index, 0); return s; } #ifndef CLIB_MARCH_VARIANT -static_always_inline - snat_out2in_error_t icmp_get_key (ip4_header_t * ip0, - snat_session_key_t * p_key0) +static_always_inline snat_out2in_error_t +icmp_get_key (vlib_buffer_t * b, ip4_header_t * ip0, + ip4_address_t * addr, u16 * port, nat_protocol_t * nat_proto) { icmp46_header_t *icmp0; - snat_session_key_t key0; icmp_echo_header_t *echo0, *inner_echo0 = 0; ip4_header_t *inner_ip0; void *l4_header = 0; @@ -276,34 +269,34 @@ static_always_inline icmp0 = (icmp46_header_t *) ip4_next_header (ip0); echo0 = (icmp_echo_header_t *) (icmp0 + 1); - if (!icmp_is_error_message (icmp0)) + if (!icmp_type_is_error_message + (vnet_buffer (b)->ip.reass.icmp_type_or_tcp_flags)) { - key0.protocol = SNAT_PROTOCOL_ICMP; - key0.addr = ip0->dst_address; - key0.port = echo0->identifier; + *nat_proto = NAT_PROTOCOL_ICMP; + *addr = ip0->dst_address; + *port = vnet_buffer (b)->ip.reass.l4_src_port; } else { inner_ip0 = (ip4_header_t *) (echo0 + 1); l4_header = ip4_next_header (inner_ip0); - key0.protocol = ip_proto_to_snat_proto (inner_ip0->protocol); - key0.addr = inner_ip0->src_address; - switch (key0.protocol) + *nat_proto = ip_proto_to_nat_proto (inner_ip0->protocol); + *addr = inner_ip0->src_address; + switch (*nat_proto) { - case SNAT_PROTOCOL_ICMP: + case NAT_PROTOCOL_ICMP: inner_icmp0 = (icmp46_header_t *) l4_header; inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1); - key0.port = inner_echo0->identifier; + *port = inner_echo0->identifier; break; - case SNAT_PROTOCOL_UDP: - case SNAT_PROTOCOL_TCP: - key0.port = ((tcp_udp_header_t *) l4_header)->src_port; + case NAT_PROTOCOL_UDP: + case NAT_PROTOCOL_TCP: + *port = ((tcp_udp_header_t *) l4_header)->src_port; break; default: return SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL; } } - *p_key0 = key0; return -1; /* success */ } @@ -315,6 +308,7 @@ static_always_inline * @param[in,out] node NAT node runtime * @param[in] thread_index thread index * @param[in,out] b0 buffer containing packet to be translated + * @param[in,out] ip0 ip header * @param[out] p_proto protocol used for matching * @param[out] p_value address and port after NAT translation * @param[out] p_dont_translate if packet should not be translated @@ -324,47 +318,48 @@ static_always_inline u32 icmp_match_out2in_slow (snat_main_t * sm, vlib_node_runtime_t * node, u32 thread_index, vlib_buffer_t * b0, - ip4_header_t * ip0, u8 * p_proto, - snat_session_key_t * p_value, - u8 * p_dont_translate, void *d, void *e) + ip4_header_t * ip0, ip4_address_t * addr, + u16 * port, u32 * fib_index, + nat_protocol_t * proto, void *d, void *e, + u8 * dont_translate) { - icmp46_header_t *icmp0; + snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; u32 sw_if_index0; - u32 rx_fib_index0; - snat_session_key_t key0; - snat_session_key_t sm0; snat_session_t *s0 = 0; - u8 dont_translate = 0; clib_bihash_kv_8_8_t kv0, value0; u8 is_addr_only; u32 next0 = ~0; int err; u8 identity_nat; + vlib_main_t *vm = vlib_get_main (); + *dont_translate = 0; - icmp0 = (icmp46_header_t *) ip4_next_header (ip0); sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0); + *fib_index = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0); - key0.protocol = 0; + *proto = 0; - err = icmp_get_key (ip0, &key0); + err = icmp_get_key (b0, ip0, addr, port, proto); if (err != -1) { b0->error = node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; next0 = SNAT_OUT2IN_NEXT_DROP; goto out; } - key0.fib_index = rx_fib_index0; - kv0.key = key0.as_u64; + ip4_address_t mapping_addr; + u16 mapping_port; + u32 mapping_fib_index; - if (clib_bihash_search_8_8 (&sm->per_thread_data[thread_index].out2in, &kv0, - &value0)) + init_nat_k (&kv0, *addr, *port, *fib_index, *proto); + if (clib_bihash_search_8_8 (&tsm->out2in, &kv0, &value0)) { /* Try to match static mapping by external address and port, destination address and port in packet */ if (snat_static_mapping_match - (sm, key0, &sm0, 1, &is_addr_only, 0, 0, 0, &identity_nat)) + (sm, *addr, *port, *fib_index, *proto, + &mapping_addr, &mapping_port, &mapping_fib_index, 1, &is_addr_only, + 0, 0, 0, &identity_nat, 0)) { if (!sm->forwarding_enabled) { @@ -372,7 +367,7 @@ icmp_match_out2in_slow (snat_main_t * sm, vlib_node_runtime_t * node, if (PREDICT_FALSE (is_interface_addr (sm, node, sw_if_index0, ip0->dst_address.as_u32))) { - dont_translate = 1; + *dont_translate = 1; goto out; } b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; @@ -381,14 +376,16 @@ icmp_match_out2in_slow (snat_main_t * sm, vlib_node_runtime_t * node, } else { - dont_translate = 1; + *dont_translate = 1; goto out; } } - if (PREDICT_FALSE (icmp0->type != ICMP4_echo_reply && - (icmp0->type != ICMP4_echo_request - || !is_addr_only))) + if (PREDICT_FALSE + (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags != + ICMP4_echo_reply + && (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags != + ICMP4_echo_request || !is_addr_only))) { b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE]; next0 = SNAT_OUT2IN_NEXT_DROP; @@ -397,13 +394,15 @@ icmp_match_out2in_slow (snat_main_t * sm, vlib_node_runtime_t * node, if (PREDICT_FALSE (identity_nat)) { - dont_translate = 1; + *dont_translate = 1; goto out; } /* Create session initiated by host from external network */ - s0 = create_session_for_static_mapping (sm, b0, sm0, key0, - node, thread_index, - vlib_time_now (sm->vlib_main)); + s0 = + create_session_for_static_mapping (sm, b0, mapping_addr, mapping_port, + mapping_fib_index, *addr, *port, + *fib_index, *proto, node, + thread_index, vlib_time_now (vm)); if (!s0) { @@ -413,24 +412,29 @@ icmp_match_out2in_slow (snat_main_t * sm, vlib_node_runtime_t * node, } else { - if (PREDICT_FALSE (icmp0->type != ICMP4_echo_reply && - icmp0->type != ICMP4_echo_request && - !icmp_is_error_message (icmp0))) + if (PREDICT_FALSE + (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags != + ICMP4_echo_reply + && vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags != + ICMP4_echo_request + && !icmp_type_is_error_message (vnet_buffer (b0)->ip. + reass.icmp_type_or_tcp_flags))) { b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE]; next0 = SNAT_OUT2IN_NEXT_DROP; goto out; } - s0 = pool_elt_at_index (sm->per_thread_data[thread_index].sessions, - value0.value); + s0 = pool_elt_at_index (tsm->sessions, value0.value); } out: - *p_proto = key0.protocol; if (s0) - *p_value = s0->in2out; - *p_dont_translate = dont_translate; + { + *addr = s0->in2out.addr; + *port = s0->in2out.port; + *fib_index = s0->in2out.fib_index; + } if (d) *(snat_session_t **) d = s0; return next0; @@ -445,6 +449,7 @@ out: * @param[in,out] node NAT node runtime * @param[in] thread_index thread index * @param[in,out] b0 buffer containing packet to be translated + * @param[in,out] ip0 ip header * @param[out] p_proto protocol used for matching * @param[out] p_value address and port after NAT translation * @param[out] p_dont_translate if packet should not be translated @@ -454,40 +459,38 @@ out: u32 icmp_match_out2in_fast (snat_main_t * sm, vlib_node_runtime_t * node, u32 thread_index, vlib_buffer_t * b0, - ip4_header_t * ip0, u8 * p_proto, - snat_session_key_t * p_value, - u8 * p_dont_translate, void *d, void *e) + ip4_header_t * ip0, ip4_address_t * mapping_addr, + u16 * mapping_port, u32 * mapping_fib_index, + nat_protocol_t * proto, void *d, void *e, + u8 * dont_translate) { - icmp46_header_t *icmp0; u32 sw_if_index0; u32 rx_fib_index0; - snat_session_key_t key0; - snat_session_key_t sm0; - u8 dont_translate = 0; u8 is_addr_only; u32 next0 = ~0; int err; + ip4_address_t addr; + u16 port; + *dont_translate = 0; - icmp0 = (icmp46_header_t *) ip4_next_header (ip0); sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0); - err = icmp_get_key (ip0, &key0); + err = icmp_get_key (b0, ip0, &addr, &port, proto); if (err != -1) { b0->error = node->errors[err]; next0 = SNAT_OUT2IN_NEXT_DROP; - goto out2; + goto out; } - key0.fib_index = rx_fib_index0; - if (snat_static_mapping_match - (sm, key0, &sm0, 1, &is_addr_only, 0, 0, 0, 0)) + (sm, addr, port, rx_fib_index0, *proto, mapping_addr, mapping_port, + mapping_fib_index, 1, &is_addr_only, 0, 0, 0, 0, 0)) { /* Don't NAT packet aimed at the intfc address */ if (is_interface_addr (sm, node, sw_if_index0, ip0->dst_address.as_u32)) { - dont_translate = 1; + *dont_translate = 1; goto out; } b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; @@ -495,9 +498,12 @@ icmp_match_out2in_fast (snat_main_t * sm, vlib_node_runtime_t * node, goto out; } - if (PREDICT_FALSE (icmp0->type != ICMP4_echo_reply && - (icmp0->type != ICMP4_echo_request || !is_addr_only) && - !icmp_is_error_message (icmp0))) + if (PREDICT_FALSE + (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags != ICMP4_echo_reply + && (vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags != + ICMP4_echo_request || !is_addr_only) + && !icmp_type_is_error_message (vnet_buffer (b0)->ip. + reass.icmp_type_or_tcp_flags))) { b0->error = node->errors[SNAT_OUT2IN_ERROR_BAD_ICMP_TYPE]; next0 = SNAT_OUT2IN_NEXT_DROP; @@ -505,10 +511,6 @@ icmp_match_out2in_fast (snat_main_t * sm, vlib_node_runtime_t * node, } out: - *p_value = sm0; -out2: - *p_proto = key0.protocol; - *p_dont_translate = dont_translate; return next0; } #endif @@ -524,8 +526,6 @@ icmp_out2in (snat_main_t * sm, vlib_node_runtime_t * node, u32 next0, u32 thread_index, void *d, void *e) { - snat_session_key_t sm0; - u8 protocol; icmp_echo_header_t *echo0, *inner_echo0 = 0; ip4_header_t *inner_ip0 = 0; void *l4_header = 0; @@ -536,12 +536,17 @@ icmp_out2in (snat_main_t * sm, ip_csum_t sum0; u16 checksum0; u32 next0_tmp; + vlib_main_t *vm = vlib_get_main (); + ip4_address_t addr; + u16 port; + u32 fib_index; + nat_protocol_t proto; echo0 = (icmp_echo_header_t *) (icmp0 + 1); next0_tmp = sm->icmp_match_out2in_cb (sm, node, thread_index, b0, ip0, - &protocol, &sm0, &dont_translate, d, - e); + &addr, &port, &fib_index, &proto, + d, e, &dont_translate); if (next0_tmp != ~0) next0 = next0_tmp; if (next0 == SNAT_OUT2IN_NEXT_DROP || dont_translate) @@ -549,11 +554,12 @@ icmp_out2in (snat_main_t * sm, if (PREDICT_TRUE (!ip4_is_fragment (ip0))) { - sum0 = ip_incremental_checksum_buffer (sm->vlib_main, b0, (u8 *) icmp0 - - (u8 *) - vlib_buffer_get_current (b0), - ntohs (ip0->length) - - ip4_header_bytes (ip0), 0); + sum0 = + ip_incremental_checksum_buffer (vm, b0, + (u8 *) icmp0 - + (u8 *) vlib_buffer_get_current (b0), + ntohs (ip0->length) - + ip4_header_bytes (ip0), 0); checksum0 = ~ip_csum_fold (sum0); if (checksum0 != 0 && checksum0 != 0xffff) { @@ -563,80 +569,86 @@ icmp_out2in (snat_main_t * sm, } old_addr0 = ip0->dst_address.as_u32; - new_addr0 = ip0->dst_address.as_u32 = sm0.addr.as_u32; - vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm0.fib_index; + new_addr0 = ip0->dst_address.as_u32 = addr.as_u32; + vnet_buffer (b0)->sw_if_index[VLIB_TX] = fib_index; sum0 = ip0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, dst_address /* changed member */ ); ip0->checksum = ip_csum_fold (sum0); - if (icmp0->checksum == 0) - icmp0->checksum = 0xffff; - if (!icmp_is_error_message (icmp0)) + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) { - new_id0 = sm0.port; - if (PREDICT_FALSE (new_id0 != echo0->identifier)) - { - old_id0 = echo0->identifier; - new_id0 = sm0.port; - echo0->identifier = new_id0; + if (icmp0->checksum == 0) + icmp0->checksum = 0xffff; - sum0 = icmp0->checksum; - sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t, - identifier /* changed member */ ); - icmp0->checksum = ip_csum_fold (sum0); - } - } - else - { - inner_ip0 = (ip4_header_t *) (echo0 + 1); - l4_header = ip4_next_header (inner_ip0); - - if (!ip4_header_checksum_is_valid (inner_ip0)) + if (!icmp_type_is_error_message (icmp0->type)) { - next0 = SNAT_OUT2IN_NEXT_DROP; - goto out; + new_id0 = port; + if (PREDICT_FALSE (new_id0 != echo0->identifier)) + { + old_id0 = echo0->identifier; + new_id0 = port; + echo0->identifier = new_id0; + + sum0 = icmp0->checksum; + sum0 = + ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t, + identifier /* changed member */ ); + icmp0->checksum = ip_csum_fold (sum0); + } } - - old_addr0 = inner_ip0->src_address.as_u32; - inner_ip0->src_address = sm0.addr; - new_addr0 = inner_ip0->src_address.as_u32; - - sum0 = icmp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, - src_address /* changed member */ ); - icmp0->checksum = ip_csum_fold (sum0); - - switch (protocol) + else { - case SNAT_PROTOCOL_ICMP: - inner_icmp0 = (icmp46_header_t *) l4_header; - inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1); + inner_ip0 = (ip4_header_t *) (echo0 + 1); + l4_header = ip4_next_header (inner_ip0); - old_id0 = inner_echo0->identifier; - new_id0 = sm0.port; - inner_echo0->identifier = new_id0; + if (!ip4_header_checksum_is_valid (inner_ip0)) + { + next0 = SNAT_OUT2IN_NEXT_DROP; + goto out; + } - sum0 = icmp0->checksum; - sum0 = ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t, - identifier); - icmp0->checksum = ip_csum_fold (sum0); - break; - case SNAT_PROTOCOL_UDP: - case SNAT_PROTOCOL_TCP: - old_id0 = ((tcp_udp_header_t *) l4_header)->src_port; - new_id0 = sm0.port; - ((tcp_udp_header_t *) l4_header)->src_port = new_id0; + old_addr0 = inner_ip0->src_address.as_u32; + inner_ip0->src_address = addr; + new_addr0 = inner_ip0->src_address.as_u32; sum0 = icmp0->checksum; - sum0 = ip_csum_update (sum0, old_id0, new_id0, tcp_udp_header_t, - src_port); + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, + src_address /* changed member */ ); icmp0->checksum = ip_csum_fold (sum0); - break; - default: - ASSERT (0); + + switch (proto) + { + case NAT_PROTOCOL_ICMP: + inner_icmp0 = (icmp46_header_t *) l4_header; + inner_echo0 = (icmp_echo_header_t *) (inner_icmp0 + 1); + + old_id0 = inner_echo0->identifier; + new_id0 = port; + inner_echo0->identifier = new_id0; + + sum0 = icmp0->checksum; + sum0 = + ip_csum_update (sum0, old_id0, new_id0, icmp_echo_header_t, + identifier); + icmp0->checksum = ip_csum_fold (sum0); + break; + case NAT_PROTOCOL_UDP: + case NAT_PROTOCOL_TCP: + old_id0 = ((tcp_udp_header_t *) l4_header)->src_port; + new_id0 = port; + ((tcp_udp_header_t *) l4_header)->src_port = new_id0; + + sum0 = icmp0->checksum; + sum0 = ip_csum_update (sum0, old_id0, new_id0, tcp_udp_header_t, + src_port); + icmp0->checksum = ip_csum_fold (sum0); + break; + default: + ASSERT (0); + } } } @@ -656,6 +668,8 @@ icmp_out2in_slow_path (snat_main_t * sm, 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; @@ -664,7 +678,7 @@ icmp_out2in_slow_path (snat_main_t * sm, /* Accounting */ nat44_session_update_counters (s0, now, vlib_buffer_length_in_chain - (sm->vlib_main, b0), thread_index); + (vm, b0), thread_index); /* Per-user LRU list maintenance */ nat44_session_update_lru (sm, s0, thread_index); } @@ -678,15 +692,10 @@ nat_out2in_sm_unknown_proto (snat_main_t * sm, { clib_bihash_kv_8_8_t kv, value; snat_static_mapping_t *m; - snat_session_key_t m_key; u32 old_addr, new_addr; ip_csum_t sum; - m_key.addr = ip->dst_address; - m_key.port = 0; - m_key.protocol = 0; - m_key.fib_index = 0; - kv.key = m_key.as_u64; + init_nat_k (&kv, ip->dst_address, 0, 0, 0); if (clib_bihash_search_8_8 (&sm->static_mapping_by_external, &kv, &value)) return 1; @@ -706,199 +715,186 @@ VLIB_NODE_FN (snat_out2in_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { - u32 n_left_from, *from, *to_next; - snat_out2in_next_t next_index; - u32 pkts_processed = 0; + u32 n_left_from, *from; snat_main_t *sm = &snat_main; f64 now = vlib_time_now (vm); u32 thread_index = vm->thread_index; - u32 tcp_packets = 0, udp_packets = 0, icmp_packets = 0, other_packets = - 0, fragments = 0; + snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index]; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; - next_index = node->cached_next_index; - while (n_left_from > 0) + 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 >= 2) { - u32 n_left_to_next; + vlib_buffer_t *b0, *b1; + u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP; + u32 next1 = SNAT_OUT2IN_NEXT_LOOKUP; + u32 sw_if_index0, sw_if_index1; + ip4_header_t *ip0, *ip1; + ip_csum_t sum0, sum1; + u32 new_addr0, old_addr0; + u16 new_port0, old_port0; + u32 new_addr1, old_addr1; + u16 new_port1, old_port1; + udp_header_t *udp0, *udp1; + tcp_header_t *tcp0, *tcp1; + icmp46_header_t *icmp0, *icmp1; + u32 rx_fib_index0, rx_fib_index1; + u32 proto0, proto1; + snat_session_t *s0 = 0, *s1 = 0; + clib_bihash_kv_8_8_t kv0, kv1, value0, value1; + u8 identity_nat0, identity_nat1; + ip4_address_t sm_addr0, sm_addr1; + u16 sm_port0, sm_port1; + u32 sm_fib_index0, sm_fib_index1; + + b0 = *b; + b++; + b1 = *b; + b++; + + /* Prefetch next iteration. */ + if (PREDICT_TRUE (n_left_from >= 4)) + { + vlib_buffer_t *p2, *p3; - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + p2 = *b; + p3 = *(b + 1); - while (n_left_from >= 4 && n_left_to_next >= 2) + vlib_prefetch_buffer_header (p2, LOAD); + vlib_prefetch_buffer_header (p3, LOAD); + + CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, LOAD); + CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, LOAD); + } + + vnet_buffer (b0)->snat.flags = 0; + vnet_buffer (b1)->snat.flags = 0; + + ip0 = vlib_buffer_get_current (b0); + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + icmp0 = (icmp46_header_t *) udp0; + + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index, + sw_if_index0); + + if (PREDICT_FALSE (ip0->ttl == 1)) { - u32 bi0, bi1; - vlib_buffer_t *b0, *b1; - u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP; - u32 next1 = SNAT_OUT2IN_NEXT_LOOKUP; - u32 sw_if_index0, sw_if_index1; - ip4_header_t *ip0, *ip1; - ip_csum_t sum0, sum1; - u32 new_addr0, old_addr0; - u16 new_port0, old_port0; - u32 new_addr1, old_addr1; - u16 new_port1, old_port1; - udp_header_t *udp0, *udp1; - tcp_header_t *tcp0, *tcp1; - icmp46_header_t *icmp0, *icmp1; - snat_session_key_t key0, key1, sm0, sm1; - u32 rx_fib_index0, rx_fib_index1; - u32 proto0, proto1; - snat_session_t *s0 = 0, *s1 = 0; - clib_bihash_kv_8_8_t kv0, kv1, value0, value1; - u8 identity_nat0, identity_nat1; - - /* Prefetch next iteration. */ - { - vlib_buffer_t *p2, *p3; - - p2 = vlib_get_buffer (vm, from[2]); - p3 = vlib_get_buffer (vm, from[3]); - - vlib_prefetch_buffer_header (p2, LOAD); - vlib_prefetch_buffer_header (p3, LOAD); - - CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE); - CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE); - } - - /* speculatively enqueue b0 and b1 to the current next frame */ - to_next[0] = bi0 = from[0]; - to_next[1] = bi1 = from[1]; - from += 2; - to_next += 2; - n_left_from -= 2; - n_left_to_next -= 2; - - b0 = vlib_get_buffer (vm, bi0); - b1 = vlib_get_buffer (vm, bi1); - - vnet_buffer (b0)->snat.flags = 0; - vnet_buffer (b1)->snat.flags = 0; - - ip0 = vlib_buffer_get_current (b0); - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; - - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index, - sw_if_index0); - - if (PREDICT_FALSE (ip0->ttl == 1)) - { - vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, - ICMP4_time_exceeded_ttl_exceeded_in_transit, - 0); - next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR; - goto trace0; - } + vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR; + goto trace0; + } - proto0 = ip_proto_to_snat_proto (ip0->protocol); + proto0 = ip_proto_to_nat_proto (ip0->protocol); - if (PREDICT_FALSE (proto0 == ~0)) + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) + { + if (nat_out2in_sm_unknown_proto (sm, b0, ip0, rx_fib_index0)) { - if (nat_out2in_sm_unknown_proto (sm, b0, ip0, rx_fib_index0)) + if (!sm->forwarding_enabled) { - if (!sm->forwarding_enabled) - { - b0->error = - node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; - next0 = SNAT_OUT2IN_NEXT_DROP; - } + b0->error = + node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; + next0 = SNAT_OUT2IN_NEXT_DROP; } - other_packets++; - goto trace0; - } - - if (PREDICT_FALSE (ip4_is_fragment (ip0))) - { - next0 = SNAT_OUT2IN_NEXT_REASS; - fragments++; - goto trace0; } + vlib_increment_simple_counter (&sm->counters.slowpath.out2in.other, + thread_index, sw_if_index0, 1); - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = icmp_out2in_slow_path - (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, - next0, now, thread_index, &s0); - icmp_packets++; - goto trace0; - } - - key0.addr = ip0->dst_address; - key0.port = udp0->dst_port; - key0.protocol = proto0; - key0.fib_index = rx_fib_index0; + goto trace0; + } - kv0.key = key0.as_u64; + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) + { + next0 = icmp_out2in_slow_path + (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, + next0, now, thread_index, &s0); + vlib_increment_simple_counter (&sm->counters.slowpath.out2in.icmp, + thread_index, sw_if_index0, 1); + goto trace0; + } - if (clib_bihash_search_8_8 - (&sm->per_thread_data[thread_index].out2in, &kv0, &value0)) + init_nat_k (&kv0, ip0->dst_address, + vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, + proto0); + if (clib_bihash_search_8_8 + (&sm->per_thread_data[thread_index].out2in, &kv0, &value0)) + { + /* 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_addr0, &sm_port0, &sm_fib_index0, 1, 0, 0, 0, + 0, &identity_nat0, 0)) { - /* Try to match static mapping by external address and port, - destination address and port in packet */ - if (snat_static_mapping_match - (sm, key0, &sm0, 1, 0, 0, 0, 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 == NAT_PROTOCOL_UDP + && (vnet_buffer (b0)->ip.reass.l4_dst_port == + clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_client)))) { - /* - * 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[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next0 = SNAT_OUT2IN_NEXT_DROP; - } + vnet_feature_next (&next0, b0); goto trace0; } - if (PREDICT_FALSE (identity_nat0)) - goto trace0; - - /* Create session initiated by host from external network */ - s0 = create_session_for_static_mapping (sm, b0, sm0, key0, node, - thread_index, now); - if (!s0) + if (!sm->forwarding_enabled) { + b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; next0 = SNAT_OUT2IN_NEXT_DROP; - goto trace0; } + goto trace0; } - else - s0 = - pool_elt_at_index (sm->per_thread_data[thread_index].sessions, - value0.value); - - 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 */ ); - ip0->checksum = ip_csum_fold (sum0); - - if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) + + if (PREDICT_FALSE (identity_nat0)) + goto trace0; + + /* Create session initiated by host from external network */ + s0 = create_session_for_static_mapping (sm, b0, + sm_addr0, sm_port0, + sm_fib_index0, + ip0->dst_address, + vnet_buffer (b0)->ip. + reass.l4_dst_port, + rx_fib_index0, proto0, node, + thread_index, now); + if (!s0) { - old_port0 = tcp0->dst_port; - tcp0->dst_port = s0->in2out.port; - new_port0 = tcp0->dst_port; + next0 = SNAT_OUT2IN_NEXT_DROP; + goto trace0; + } + } + else + s0 = pool_elt_at_index (tsm->sessions, value0.value); + 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 */ ); + ip0->checksum = ip_csum_fold (sum0); + + if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) + { + old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port; + new_port0 = udp0->dst_port = s0->in2out.port; sum0 = tcp0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, @@ -908,173 +904,181 @@ VLIB_NODE_FN (snat_out2in_node) (vlib_main_t * vm, ip4_header_t /* cheat */ , length /* changed member */ ); tcp0->checksum = ip_csum_fold (sum0); - tcp_packets++; } - else + vlib_increment_simple_counter (&sm->counters.slowpath.out2in.tcp, + thread_index, sw_if_index0, 1); + } + else + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) { + old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port; + new_port0 = udp0->dst_port = s0->in2out.port; if (PREDICT_FALSE (udp0->checksum)) { - old_port0 = udp0->dst_port; - 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 /* changed member */ ); - sum0 = ip_csum_update (sum0, old_port0, new_port0, - ip4_header_t /* cheat */ , - length /* changed member */ ); + 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 */ ); udp0->checksum = ip_csum_fold (sum0); } - udp_packets++; } + vlib_increment_simple_counter (&sm->counters.slowpath.out2in.udp, + thread_index, sw_if_index0, 1); + } - /* 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: + /* 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))) - { - snat_out2in_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - t->next_index = next0; - t->session_index = ~0; - if (s0) - t->session_index = - s0 - sm->per_thread_data[thread_index].sessions; - } + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + snat_out2in_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next0; + t->session_index = ~0; + if (s0) + t->session_index = + s0 - sm->per_thread_data[thread_index].sessions; + } - pkts_processed += next0 == SNAT_OUT2IN_NEXT_LOOKUP; + if (next0 == SNAT_OUT2IN_NEXT_DROP) + { + vlib_increment_simple_counter (&sm->counters.slowpath.out2in.drops, + thread_index, sw_if_index0, 1); + } - ip1 = vlib_buffer_get_current (b1); - udp1 = ip4_next_header (ip1); - tcp1 = (tcp_header_t *) udp1; - icmp1 = (icmp46_header_t *) udp1; + ip1 = vlib_buffer_get_current (b1); + udp1 = ip4_next_header (ip1); + tcp1 = (tcp_header_t *) udp1; + icmp1 = (icmp46_header_t *) udp1; - sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX]; - rx_fib_index1 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index, - sw_if_index1); + sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX]; + rx_fib_index1 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index, + sw_if_index1); - if (PREDICT_FALSE (ip1->ttl == 1)) - { - vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded, - ICMP4_time_exceeded_ttl_exceeded_in_transit, - 0); - next1 = SNAT_OUT2IN_NEXT_ICMP_ERROR; - goto trace1; - } + if (PREDICT_FALSE (ip1->ttl == 1)) + { + vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b1, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next1 = SNAT_OUT2IN_NEXT_ICMP_ERROR; + goto trace1; + } - proto1 = ip_proto_to_snat_proto (ip1->protocol); + proto1 = ip_proto_to_nat_proto (ip1->protocol); - if (PREDICT_FALSE (proto1 == ~0)) + if (PREDICT_FALSE (proto1 == NAT_PROTOCOL_OTHER)) + { + if (nat_out2in_sm_unknown_proto (sm, b1, ip1, rx_fib_index1)) { - if (nat_out2in_sm_unknown_proto (sm, b1, ip1, rx_fib_index1)) + if (!sm->forwarding_enabled) { - if (!sm->forwarding_enabled) - { - b1->error = - node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; - next1 = SNAT_OUT2IN_NEXT_DROP; - } + b1->error = + node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; + next1 = SNAT_OUT2IN_NEXT_DROP; } - other_packets++; - goto trace1; - } - - if (PREDICT_FALSE (ip4_is_fragment (ip1))) - { - next1 = SNAT_OUT2IN_NEXT_REASS; - fragments++; - goto trace1; - } - - if (PREDICT_FALSE (proto1 == SNAT_PROTOCOL_ICMP)) - { - next1 = icmp_out2in_slow_path - (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node, - next1, now, thread_index, &s1); - icmp_packets++; - goto trace1; } + vlib_increment_simple_counter (&sm->counters.slowpath.out2in.other, + thread_index, sw_if_index1, 1); + goto trace1; + } - key1.addr = ip1->dst_address; - key1.port = udp1->dst_port; - key1.protocol = proto1; - key1.fib_index = rx_fib_index1; + if (PREDICT_FALSE (proto1 == NAT_PROTOCOL_ICMP)) + { + next1 = icmp_out2in_slow_path + (sm, b1, ip1, icmp1, sw_if_index1, rx_fib_index1, node, + next1, now, thread_index, &s1); + vlib_increment_simple_counter (&sm->counters.slowpath.out2in.icmp, + thread_index, sw_if_index1, 1); + goto trace1; + } - kv1.key = key1.as_u64; + init_nat_k (&kv1, ip1->dst_address, + vnet_buffer (b1)->ip.reass.l4_dst_port, rx_fib_index1, + proto1); - if (clib_bihash_search_8_8 - (&sm->per_thread_data[thread_index].out2in, &kv1, &value1)) + if (clib_bihash_search_8_8 + (&sm->per_thread_data[thread_index].out2in, &kv1, &value1)) + { + /* Try to match static mapping by external address and port, + destination address and port in packet */ + if (snat_static_mapping_match + (sm, ip1->dst_address, + vnet_buffer (b1)->ip.reass.l4_dst_port, proto1, + rx_fib_index1, &sm_addr1, &sm_port1, &sm_fib_index1, 1, 0, + 0, 0, 0, &identity_nat1, 0)) { - /* Try to match static mapping by external address and port, - destination address and port in packet */ - if (snat_static_mapping_match - (sm, key1, &sm1, 1, 0, 0, 0, 0, &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 == NAT_PROTOCOL_UDP + && (vnet_buffer (b1)->ip.reass.l4_dst_port == + clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_client)))) { - /* - * 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 trace1; - } - - if (!sm->forwarding_enabled) - { - b1->error = - node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next1 = SNAT_OUT2IN_NEXT_DROP; - } + vnet_feature_next (&next1, b1); goto trace1; } - if (PREDICT_FALSE (identity_nat1)) - goto trace1; - - /* Create session initiated by host from external network */ - s1 = create_session_for_static_mapping (sm, b1, sm1, key1, node, - thread_index, now); - if (!s1) + if (!sm->forwarding_enabled) { + b1->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; next1 = SNAT_OUT2IN_NEXT_DROP; - goto trace1; } + goto trace1; } - else - s1 = - pool_elt_at_index (sm->per_thread_data[thread_index].sessions, - value1.value); - - old_addr1 = ip1->dst_address.as_u32; - ip1->dst_address = s1->in2out.addr; - new_addr1 = ip1->dst_address.as_u32; - vnet_buffer (b1)->sw_if_index[VLIB_TX] = s1->in2out.fib_index; - - sum1 = ip1->checksum; - sum1 = ip_csum_update (sum1, old_addr1, new_addr1, - ip4_header_t, - dst_address /* changed member */ ); - ip1->checksum = ip_csum_fold (sum1); - - if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP)) + + if (PREDICT_FALSE (identity_nat1)) + goto trace1; + + /* Create session initiated by host from external network */ + s1 = + create_session_for_static_mapping (sm, b1, sm_addr1, sm_port1, + sm_fib_index1, + ip1->dst_address, + vnet_buffer (b1)->ip. + reass.l4_dst_port, + rx_fib_index1, proto1, node, + thread_index, now); + if (!s1) + { + next1 = SNAT_OUT2IN_NEXT_DROP; + goto trace1; + } + } + else + s1 = + pool_elt_at_index (sm->per_thread_data[thread_index].sessions, + value1.value); + + old_addr1 = ip1->dst_address.as_u32; + ip1->dst_address = s1->in2out.addr; + new_addr1 = ip1->dst_address.as_u32; + vnet_buffer (b1)->sw_if_index[VLIB_TX] = s1->in2out.fib_index; + + sum1 = ip1->checksum; + sum1 = ip_csum_update (sum1, old_addr1, new_addr1, + ip4_header_t, dst_address /* changed member */ ); + ip1->checksum = ip_csum_fold (sum1); + + if (PREDICT_TRUE (proto1 == NAT_PROTOCOL_TCP)) + { + if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment) { - old_port1 = tcp1->dst_port; - tcp1->dst_port = s1->in2out.port; - new_port1 = tcp1->dst_port; + old_port1 = vnet_buffer (b1)->ip.reass.l4_dst_port; + new_port1 = udp1->dst_port = s1->in2out.port; sum1 = tcp1->checksum; sum1 = ip_csum_update (sum1, old_addr1, new_addr1, @@ -1085,210 +1089,215 @@ VLIB_NODE_FN (snat_out2in_node) (vlib_main_t * vm, ip4_header_t /* cheat */ , length /* changed member */ ); tcp1->checksum = ip_csum_fold (sum1); - tcp_packets++; } - else + vlib_increment_simple_counter (&sm->counters.slowpath.out2in.tcp, + thread_index, sw_if_index1, 1); + } + else + { + if (!vnet_buffer (b1)->ip.reass.is_non_first_fragment) { + old_port1 = vnet_buffer (b1)->ip.reass.l4_dst_port; + new_port1 = udp1->dst_port = s1->in2out.port; if (PREDICT_FALSE (udp1->checksum)) { - old_port1 = udp1->dst_port; - new_port1 = udp1->dst_port = s1->in2out.port; sum1 = udp1->checksum; - sum1 = ip_csum_update (sum1, old_addr1, new_addr1, - ip4_header_t, - dst_address /* changed member */ ); - sum1 = ip_csum_update (sum1, old_port1, new_port1, - ip4_header_t /* cheat */ , - length /* changed member */ ); + sum1 = + ip_csum_update (sum1, old_addr1, new_addr1, + ip4_header_t, + dst_address /* changed member */ ); + sum1 = + ip_csum_update (sum1, old_port1, new_port1, + ip4_header_t /* cheat */ , + length /* changed member */ ); udp1->checksum = ip_csum_fold (sum1); } - udp_packets++; } + vlib_increment_simple_counter (&sm->counters.slowpath.out2in.udp, + thread_index, sw_if_index1, 1); + } - /* Accounting */ - nat44_session_update_counters (s1, now, - vlib_buffer_length_in_chain (vm, b1), - thread_index); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s1, thread_index); - trace1: - - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b1->flags & VLIB_BUFFER_IS_TRACED))) - { - snat_out2in_trace_t *t = - vlib_add_trace (vm, node, b1, sizeof (*t)); - t->sw_if_index = sw_if_index1; - t->next_index = next1; - t->session_index = ~0; - if (s1) - t->session_index = - s1 - sm->per_thread_data[thread_index].sessions; - } + /* Accounting */ + nat44_session_update_counters (s1, now, + vlib_buffer_length_in_chain (vm, b1), + thread_index); + /* Per-user LRU list maintenance */ + nat44_session_update_lru (sm, s1, thread_index); + trace1: - pkts_processed += next1 == SNAT_OUT2IN_NEXT_LOOKUP; + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b1->flags & VLIB_BUFFER_IS_TRACED))) + { + snat_out2in_trace_t *t = vlib_add_trace (vm, node, b1, sizeof (*t)); + t->sw_if_index = sw_if_index1; + t->next_index = next1; + t->session_index = ~0; + if (s1) + t->session_index = + s1 - sm->per_thread_data[thread_index].sessions; + } - /* verify speculative enqueues, maybe switch current next frame */ - vlib_validate_buffer_enqueue_x2 (vm, node, next_index, - to_next, n_left_to_next, - bi0, bi1, next0, next1); + if (next1 == SNAT_OUT2IN_NEXT_DROP) + { + vlib_increment_simple_counter (&sm->counters.slowpath.out2in.drops, + thread_index, sw_if_index1, 1); } - while (n_left_from > 0 && n_left_to_next > 0) + n_left_from -= 2; + next[0] = next0; + next[1] = next1; + next += 2; + } + + while (n_left_from > 0) + { + vlib_buffer_t *b0; + u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP; + u32 sw_if_index0; + ip4_header_t *ip0; + ip_csum_t sum0; + u32 new_addr0, old_addr0; + u16 new_port0, old_port0; + udp_header_t *udp0; + tcp_header_t *tcp0; + icmp46_header_t *icmp0; + u32 rx_fib_index0; + u32 proto0; + snat_session_t *s0 = 0; + clib_bihash_kv_8_8_t kv0, value0; + u8 identity_nat0; + ip4_address_t sm_addr0; + u16 sm_port0; + u32 sm_fib_index0; + + b0 = *b; + ++b; + + vnet_buffer (b0)->snat.flags = 0; + + ip0 = vlib_buffer_get_current (b0); + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + icmp0 = (icmp46_header_t *) udp0; + + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index, + sw_if_index0); + + proto0 = ip_proto_to_nat_proto (ip0->protocol); + + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) { - u32 bi0; - vlib_buffer_t *b0; - u32 next0 = SNAT_OUT2IN_NEXT_LOOKUP; - u32 sw_if_index0; - ip4_header_t *ip0; - ip_csum_t sum0; - u32 new_addr0, old_addr0; - u16 new_port0, old_port0; - udp_header_t *udp0; - tcp_header_t *tcp0; - icmp46_header_t *icmp0; - snat_session_key_t key0, sm0; - u32 rx_fib_index0; - u32 proto0; - snat_session_t *s0 = 0; - clib_bihash_kv_8_8_t kv0, value0; - 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); - - vnet_buffer (b0)->snat.flags = 0; - - ip0 = vlib_buffer_get_current (b0); - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; - - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - rx_fib_index0 = vec_elt (sm->ip4_main->fib_index_by_sw_if_index, - sw_if_index0); - - proto0 = ip_proto_to_snat_proto (ip0->protocol); - - if (PREDICT_FALSE (proto0 == ~0)) + if (nat_out2in_sm_unknown_proto (sm, b0, ip0, rx_fib_index0)) { - if (nat_out2in_sm_unknown_proto (sm, b0, ip0, rx_fib_index0)) + if (!sm->forwarding_enabled) { - if (!sm->forwarding_enabled) - { - b0->error = - node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; - next0 = SNAT_OUT2IN_NEXT_DROP; - } + b0->error = + node->errors[SNAT_OUT2IN_ERROR_UNSUPPORTED_PROTOCOL]; + next0 = SNAT_OUT2IN_NEXT_DROP; } - other_packets++; - goto trace00; - } - - if (PREDICT_FALSE (ip0->ttl == 1)) - { - vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, - ICMP4_time_exceeded_ttl_exceeded_in_transit, - 0); - next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR; - goto trace00; - } - - if (PREDICT_FALSE (ip4_is_fragment (ip0))) - { - next0 = SNAT_OUT2IN_NEXT_REASS; - fragments++; - goto trace00; } + vlib_increment_simple_counter (&sm->counters.slowpath.out2in.other, + thread_index, sw_if_index0, 1); + goto trace00; + } - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = icmp_out2in_slow_path - (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, - next0, now, thread_index, &s0); - icmp_packets++; - goto trace00; - } + if (PREDICT_FALSE (ip0->ttl == 1)) + { + vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR; + goto trace00; + } - key0.addr = ip0->dst_address; - key0.port = udp0->dst_port; - key0.protocol = proto0; - key0.fib_index = rx_fib_index0; + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) + { + next0 = icmp_out2in_slow_path + (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, + next0, now, thread_index, &s0); + vlib_increment_simple_counter (&sm->counters.slowpath.out2in.icmp, + thread_index, sw_if_index0, 1); + goto trace00; + } - kv0.key = key0.as_u64; + init_nat_k (&kv0, ip0->dst_address, + vnet_buffer (b0)->ip.reass.l4_dst_port, rx_fib_index0, + proto0); - if (clib_bihash_search_8_8 - (&sm->per_thread_data[thread_index].out2in, &kv0, &value0)) + if (clib_bihash_search_8_8 + (&sm->per_thread_data[thread_index].out2in, &kv0, &value0)) + { + /* 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_addr0, &sm_port0, &sm_fib_index0, 1, 0, 0, 0, + 0, &identity_nat0, 0)) { - /* Try to match static mapping by external address and port, - destination address and port in packet */ - if (snat_static_mapping_match - (sm, key0, &sm0, 1, 0, 0, 0, 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 == NAT_PROTOCOL_UDP + && (vnet_buffer (b0)->ip.reass.l4_dst_port == + clib_host_to_net_u16 (UDP_DST_PORT_dhcp_to_client)))) { - /* - * 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[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next0 = SNAT_OUT2IN_NEXT_DROP; - } + vnet_feature_next (&next0, b0); goto trace00; } - if (PREDICT_FALSE (identity_nat0)) - goto trace00; - - /* Create session initiated by host from external network */ - s0 = create_session_for_static_mapping (sm, b0, sm0, key0, node, - thread_index, now); - if (!s0) + if (!sm->forwarding_enabled) { + b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; next0 = SNAT_OUT2IN_NEXT_DROP; - goto trace00; } + goto trace00; } - else - s0 = - pool_elt_at_index (sm->per_thread_data[thread_index].sessions, - value0.value); - - 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 */ ); - ip0->checksum = ip_csum_fold (sum0); - - if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) + + if (PREDICT_FALSE (identity_nat0)) + goto trace00; + + /* Create session initiated by host from external network */ + s0 = create_session_for_static_mapping (sm, b0, + sm_addr0, sm_port0, + sm_fib_index0, + ip0->dst_address, + vnet_buffer (b0)->ip. + reass.l4_dst_port, + rx_fib_index0, proto0, node, + thread_index, now); + if (!s0) { - old_port0 = tcp0->dst_port; - tcp0->dst_port = s0->in2out.port; - new_port0 = tcp0->dst_port; + next0 = SNAT_OUT2IN_NEXT_DROP; + goto trace00; + } + } + else + s0 = + pool_elt_at_index (sm->per_thread_data[thread_index].sessions, + value0.value); + + 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 */ ); + ip0->checksum = ip_csum_fold (sum0); + + if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) + { + old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port; + new_port0 = udp0->dst_port = s0->in2out.port; sum0 = tcp0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, @@ -1299,73 +1308,65 @@ VLIB_NODE_FN (snat_out2in_node) (vlib_main_t * vm, ip4_header_t /* cheat */ , length /* changed member */ ); tcp0->checksum = ip_csum_fold (sum0); - tcp_packets++; } - else + vlib_increment_simple_counter (&sm->counters.slowpath.out2in.tcp, + thread_index, sw_if_index0, 1); + } + else + { + if (!vnet_buffer (b0)->ip.reass.is_non_first_fragment) { + old_port0 = vnet_buffer (b0)->ip.reass.l4_dst_port; + new_port0 = udp0->dst_port = s0->in2out.port; if (PREDICT_FALSE (udp0->checksum)) { - old_port0 = udp0->dst_port; - 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 /* changed member */ ); - sum0 = ip_csum_update (sum0, old_port0, new_port0, - ip4_header_t /* cheat */ , - length /* changed member */ ); + 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 */ ); udp0->checksum = ip_csum_fold (sum0); } - udp_packets++; } + vlib_increment_simple_counter (&sm->counters.slowpath.out2in.udp, + thread_index, sw_if_index0, 1); + } - /* Accounting */ - nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain (vm, b0), - thread_index); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s0, thread_index); - trace00: - - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - snat_out2in_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - t->next_index = next0; - t->session_index = ~0; - if (s0) - t->session_index = - s0 - sm->per_thread_data[thread_index].sessions; - } + /* Accounting */ + nat44_session_update_counters (s0, now, + vlib_buffer_length_in_chain (vm, b0), + thread_index); + /* Per-user LRU list maintenance */ + nat44_session_update_lru (sm, s0, thread_index); + trace00: - pkts_processed += next0 == SNAT_OUT2IN_NEXT_LOOKUP; + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + snat_out2in_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next0; + t->session_index = ~0; + if (s0) + t->session_index = + s0 - sm->per_thread_data[thread_index].sessions; + } - /* 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 (next0 == SNAT_OUT2IN_NEXT_DROP) + { + vlib_increment_simple_counter (&sm->counters.slowpath.out2in.drops, + thread_index, sw_if_index0, 1); } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); + n_left_from--; + next[0] = next0; + next++; } - vlib_node_increment_counter (vm, sm->out2in_node_index, - SNAT_OUT2IN_ERROR_OUT2IN_PACKETS, - pkts_processed); - vlib_node_increment_counter (vm, sm->out2in_node_index, - SNAT_OUT2IN_ERROR_TCP_PACKETS, tcp_packets); - vlib_node_increment_counter (vm, sm->out2in_node_index, - SNAT_OUT2IN_ERROR_UDP_PACKETS, udp_packets); - vlib_node_increment_counter (vm, sm->out2in_node_index, - SNAT_OUT2IN_ERROR_ICMP_PACKETS, icmp_packets); - vlib_node_increment_counter (vm, sm->out2in_node_index, - SNAT_OUT2IN_ERROR_OTHER_PACKETS, - other_packets); - vlib_node_increment_counter (vm, sm->out2in_node_index, - SNAT_OUT2IN_ERROR_FRAGMENTS, fragments); + vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts, + frame->n_vectors); return frame->n_vectors; } @@ -1389,522 +1390,167 @@ VLIB_REGISTER_NODE (snat_out2in_node) = { [SNAT_OUT2IN_NEXT_DROP] = "error-drop", [SNAT_OUT2IN_NEXT_LOOKUP] = "ip4-lookup", [SNAT_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error", - [SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass", }, }; /* *INDENT-ON* */ -VLIB_NODE_FN (nat44_out2in_reass_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) +VLIB_NODE_FN (snat_out2in_fast_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) { - u32 n_left_from, *from, *to_next; - snat_out2in_next_t next_index; - u32 pkts_processed = 0, cached_fragments = 0; + 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 *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; + 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 > 0 && n_left_to_next > 0) + vlib_buffer_t *b0; + u32 next0 = SNAT_OUT2IN_NEXT_DROP; + u32 sw_if_index0; + ip4_header_t *ip0; + ip_csum_t sum0; + u32 new_addr0, old_addr0; + u16 new_port0, old_port0; + udp_header_t *udp0; + tcp_header_t *tcp0; + icmp46_header_t *icmp0; + u32 proto0; + u32 rx_fib_index0; + ip4_address_t sm_addr0; + u16 sm_port0; + u32 sm_fib_index0; + + b0 = *b; + b++; + + ip0 = vlib_buffer_get_current (b0); + udp0 = ip4_next_header (ip0); + tcp0 = (tcp_header_t *) udp0; + icmp0 = (icmp46_header_t *) udp0; + + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0); + + vnet_feature_next (&next0, b0); + + if (PREDICT_FALSE (ip0->ttl == 1)) { - u32 bi0, sw_if_index0, proto0, rx_fib_index0, new_addr0, old_addr0; - vlib_buffer_t *b0; - u32 next0; - u8 cached0 = 0; - ip4_header_t *ip0; - nat_reass_ip4_t *reass0; - udp_header_t *udp0; - tcp_header_t *tcp0; - icmp46_header_t *icmp0; - snat_session_key_t key0, sm0; - clib_bihash_kv_8_8_t kv0, value0; - snat_session_t *s0 = 0; - u16 old_port0, new_port0; - ip_csum_t sum0; - 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 = SNAT_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 = SNAT_OUT2IN_NEXT_DROP; - b0->error = node->errors[SNAT_OUT2IN_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 = SNAT_OUT2IN_NEXT_DROP; - b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_REASS]; - nat_elog_notice ("maximum reassemblies exceeded"); - goto trace0; - } - - if (PREDICT_FALSE (ip4_is_first_fragment (ip0))) - { - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) - { - next0 = icmp_out2in_slow_path - (sm, b0, ip0, icmp0, sw_if_index0, rx_fib_index0, node, - next0, now, thread_index, &s0); - - if (PREDICT_TRUE (next0 != SNAT_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; - } - - key0.addr = ip0->dst_address; - key0.port = udp0->dst_port; - key0.protocol = proto0; - key0.fib_index = rx_fib_index0; - kv0.key = key0.as_u64; - - if (clib_bihash_search_8_8 - (&per_thread_data->out2in, &kv0, &value0)) - { - /* Try to match static mapping by external address and port, - destination address and port in packet */ - if (snat_static_mapping_match - (sm, key0, &sm0, 1, 0, 0, 0, 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[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next0 = SNAT_OUT2IN_NEXT_DROP; - } - else - { - reass0->flags |= NAT_REASS_FLAG_ED_DONT_TRANSLATE; - nat_ip4_reass_get_frags (reass0, - &fragments_to_loopback); - } - goto trace0; - } - - if (PREDICT_FALSE (identity_nat0)) - goto trace0; - - /* Create session initiated by host from external network */ - s0 = - create_session_for_static_mapping (sm, b0, sm0, key0, - node, thread_index, - now); - if (!s0) - { - b0->error = - node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - next0 = SNAT_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 - (thread_index, reass0, bi0, &fragments_to_drop)) - { - b0->error = node->errors[SNAT_OUT2IN_ERROR_MAX_FRAG]; - nat_elog_notice - ("maximum fragments per reassembly exceeded"); - next0 = SNAT_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 */ ); - ip0->checksum = ip_csum_fold (sum0); - - if (PREDICT_FALSE (ip4_is_first_fragment (ip0))) - { - old_port0 = udp0->dst_port; - new_port0 = udp0->dst_port = s0->in2out.port; - - if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) - { - sum0 = tcp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */ ); - - sum0 = ip_csum_update (sum0, old_port0, new_port0, - ip4_header_t /* cheat */ , - length /* changed member */ ); - tcp0->checksum = ip_csum_fold (sum0); - } - else if (udp0->checksum) - { - sum0 = udp0->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 */ ); - udp0->checksum = ip_csum_fold (sum0); - } - } - - /* Accounting */ - nat44_session_update_counters (s0, now, - vlib_buffer_length_in_chain (vm, b0), - thread_index); - /* Per-user LRU list maintenance */ - nat44_session_update_lru (sm, s0, thread_index); - - trace0: - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - nat44_reass_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->cached = cached0; - t->sw_if_index = sw_if_index0; - t->next_index = next0; - } - - if (cached0) - { - n_left_to_next++; - to_next--; - cached_fragments++; - } - else - { - pkts_processed += next0 != SNAT_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; - } - } + vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, + ICMP4_time_exceeded_ttl_exceeded_in_transit, + 0); + next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR; + goto trace00; } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - } - - vlib_node_increment_counter (vm, sm->out2in_reass_node_index, - SNAT_OUT2IN_ERROR_PROCESSED_FRAGMENTS, - pkts_processed); - vlib_node_increment_counter (vm, sm->out2in_reass_node_index, - SNAT_OUT2IN_ERROR_CACHED_FRAGMENTS, - cached_fragments); - - nat_send_all_to_node (vm, fragments_to_drop, node, - &node->errors[SNAT_OUT2IN_ERROR_DROP_FRAGMENT], - SNAT_OUT2IN_NEXT_DROP); - - vec_free (fragments_to_drop); - vec_free (fragments_to_loopback); - return frame->n_vectors; -} - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (nat44_out2in_reass_node) = { - .name = "nat44-out2in-reass", - .vector_size = sizeof (u32), - .format_trace = format_nat44_reass_trace, - .type = VLIB_NODE_TYPE_INTERNAL, - - .n_errors = ARRAY_LEN(snat_out2in_error_strings), - .error_strings = snat_out2in_error_strings, + proto0 = ip_proto_to_nat_proto (ip0->protocol); - .n_next_nodes = SNAT_OUT2IN_N_NEXT, + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER)) + goto trace00; - /* edit / add dispositions here */ - .next_nodes = { - [SNAT_OUT2IN_NEXT_DROP] = "error-drop", - [SNAT_OUT2IN_NEXT_LOOKUP] = "ip4-lookup", - [SNAT_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error", - [SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass", - }, -}; -/* *INDENT-ON* */ - -VLIB_NODE_FN (snat_out2in_fast_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - u32 n_left_from, *from, *to_next; - snat_out2in_next_t next_index; - u32 pkts_processed = 0; - snat_main_t *sm = &snat_main; + if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP)) + { + next0 = icmp_out2in (sm, b0, ip0, icmp0, sw_if_index0, + rx_fib_index0, node, next0, ~0, 0, 0); + goto trace00; + } - from = vlib_frame_vector_args (frame); - n_left_from = frame->n_vectors; - next_index = node->cached_next_index; + if (snat_static_mapping_match + (sm, ip0->dst_address, udp0->dst_port, rx_fib_index0, proto0, + &sm_addr0, &sm_port0, &sm_fib_index0, 1, 0, 0, 0, 0, 0, 0)) + { + b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; + goto trace00; + } - while (n_left_from > 0) - { - u32 n_left_to_next; + new_addr0 = sm_addr0.as_u32; + new_port0 = sm_port0; + vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm_fib_index0; + old_addr0 = ip0->dst_address.as_u32; + ip0->dst_address.as_u32 = new_addr0; - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + sum0 = ip0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, dst_address /* changed member */ ); + ip0->checksum = ip_csum_fold (sum0); - while (n_left_from > 0 && n_left_to_next > 0) + if (PREDICT_FALSE (new_port0 != udp0->dst_port)) { - u32 bi0; - vlib_buffer_t *b0; - u32 next0 = SNAT_OUT2IN_NEXT_DROP; - u32 sw_if_index0; - ip4_header_t *ip0; - ip_csum_t sum0; - u32 new_addr0, old_addr0; - u16 new_port0, old_port0; - udp_header_t *udp0; - tcp_header_t *tcp0; - icmp46_header_t *icmp0; - snat_session_key_t key0, sm0; - u32 proto0; - u32 rx_fib_index0; - - /* speculatively enqueue b0 to the current next frame */ - bi0 = from[0]; - to_next[0] = bi0; - from += 1; - to_next += 1; - n_left_from -= 1; - n_left_to_next -= 1; - - b0 = vlib_get_buffer (vm, bi0); - - ip0 = vlib_buffer_get_current (b0); - udp0 = ip4_next_header (ip0); - tcp0 = (tcp_header_t *) udp0; - icmp0 = (icmp46_header_t *) udp0; - - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - rx_fib_index0 = - ip4_fib_table_get_index_for_sw_if_index (sw_if_index0); - - vnet_feature_next (&next0, b0); - - if (PREDICT_FALSE (ip0->ttl == 1)) - { - vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; - icmp4_error_set_vnet_buffer (b0, ICMP4_time_exceeded, - ICMP4_time_exceeded_ttl_exceeded_in_transit, - 0); - next0 = SNAT_OUT2IN_NEXT_ICMP_ERROR; - goto trace00; - } - - proto0 = ip_proto_to_snat_proto (ip0->protocol); + old_port0 = udp0->dst_port; + udp0->dst_port = new_port0; - if (PREDICT_FALSE (proto0 == ~0)) - goto trace00; - - if (PREDICT_FALSE (proto0 == SNAT_PROTOCOL_ICMP)) + if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) { - next0 = icmp_out2in (sm, b0, ip0, icmp0, sw_if_index0, - rx_fib_index0, node, next0, ~0, 0, 0); - goto trace00; + sum0 = tcp0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, + dst_address /* changed member */ ); + sum0 = ip_csum_update (sum0, old_port0, new_port0, + ip4_header_t /* cheat */ , + length /* changed member */ ); + tcp0->checksum = ip_csum_fold (sum0); } - - key0.addr = ip0->dst_address; - key0.port = udp0->dst_port; - key0.fib_index = rx_fib_index0; - - if (snat_static_mapping_match (sm, key0, &sm0, 1, 0, 0, 0, 0, 0)) + else if (udp0->checksum) { - b0->error = node->errors[SNAT_OUT2IN_ERROR_NO_TRANSLATION]; - goto trace00; + sum0 = udp0->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 */ ); + udp0->checksum = ip_csum_fold (sum0); } - - new_addr0 = sm0.addr.as_u32; - new_port0 = sm0.port; - vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm0.fib_index; - old_addr0 = ip0->dst_address.as_u32; - ip0->dst_address.as_u32 = new_addr0; - - sum0 = ip0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */ ); - ip0->checksum = ip_csum_fold (sum0); - - if (PREDICT_FALSE (new_port0 != udp0->dst_port)) + } + else + { + if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP)) { - old_port0 = udp0->dst_port; - udp0->dst_port = new_port0; - - if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) - { - sum0 = tcp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */ ); - sum0 = ip_csum_update (sum0, old_port0, new_port0, - ip4_header_t /* cheat */ , - length /* changed member */ ); - tcp0->checksum = ip_csum_fold (sum0); - } - else if (udp0->checksum) - { - sum0 = udp0->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 */ ); - udp0->checksum = ip_csum_fold (sum0); - } + sum0 = tcp0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, + dst_address /* changed member */ ); + tcp0->checksum = ip_csum_fold (sum0); } - else + else if (udp0->checksum) { - if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) - { - sum0 = tcp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */ ); - tcp0->checksum = ip_csum_fold (sum0); - } - else if (udp0->checksum) - { - sum0 = udp0->checksum; - sum0 = ip_csum_update (sum0, old_addr0, new_addr0, - ip4_header_t, - dst_address /* changed member */ ); - udp0->checksum = ip_csum_fold (sum0); - } + sum0 = udp0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, + ip4_header_t, + dst_address /* changed member */ ); + udp0->checksum = ip_csum_fold (sum0); } + } - trace00: + trace00: - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - snat_out2in_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - t->next_index = next0; - } - - pkts_processed += next0 != SNAT_OUT2IN_NEXT_DROP; + if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) + { + snat_out2in_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); + t->sw_if_index = sw_if_index0; + t->next_index = next0; + } - /* 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 (next0 == SNAT_OUT2IN_NEXT_DROP) + { + vlib_increment_simple_counter (&sm->counters.fastpath.out2in.drops, + vm->thread_index, sw_if_index0, 1); } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); + n_left_from--; + next[0] = next0; + next++; } - vlib_node_increment_counter (vm, sm->out2in_fast_node_index, - SNAT_OUT2IN_ERROR_OUT2IN_PACKETS, - pkts_processed); + vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts, + frame->n_vectors); + return frame->n_vectors; } @@ -1927,7 +1573,6 @@ VLIB_REGISTER_NODE (snat_out2in_fast_node) = { [SNAT_OUT2IN_NEXT_LOOKUP] = "ip4-lookup", [SNAT_OUT2IN_NEXT_DROP] = "error-drop", [SNAT_OUT2IN_NEXT_ICMP_ERROR] = "ip4-icmp-error", - [SNAT_OUT2IN_NEXT_REASS] = "nat44-out2in-reass", }, }; /* *INDENT-ON* */