+++ /dev/null
-/*
- * nat44_ei.c - nat44 endpoint dependent plugin
- * * Copyright (c) 2020 Cisco and/or its affiliates. * Licensed under the
- * Apache License, Version 2.0 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of the License
- * at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
- */
-
-#include <vlib/vlib.h>
-#include <vnet/vnet.h>
-#include <vnet/fib/ip4_fib.h>
-
-#include <nat/nat44-ei/nat44_ei.h>
-#include <nat/nat44-ei/nat44_ei_inlines.h>
-#include <nat/nat44-ei/nat44_ei_hairpinning.h>
-
-/* NAT buffer flags */
-#define NAT44_EI_FLAG_HAIRPINNING (1 << 0)
-
-typedef enum
-{
- NAT44_EI_HAIRPIN_SRC_NEXT_DROP,
- NAT44_EI_HAIRPIN_SRC_NEXT_SNAT_IN2OUT,
- NAT44_EI_HAIRPIN_SRC_NEXT_SNAT_IN2OUT_WH,
- NAT44_EI_HAIRPIN_SRC_NEXT_INTERFACE_OUTPUT,
- NAT44_EI_HAIRPIN_SRC_N_NEXT,
-} nat44_ei_hairpin_src_next_t;
-
-typedef enum
-{
- NAT44_EI_HAIRPIN_NEXT_LOOKUP,
- NAT44_EI_HAIRPIN_NEXT_DROP,
- NAT44_EI_HAIRPIN_NEXT_HANDOFF,
- NAT44_EI_HAIRPIN_N_NEXT,
-} nat44_ei_hairpin_next_t;
-
-typedef struct
-{
- ip4_address_t addr;
- u16 port;
- u32 fib_index;
- u32 session_index;
-} nat44_ei_hairpin_trace_t;
-
-static u8 *
-format_nat44_ei_hairpin_trace (u8 *s, va_list *args)
-{
- CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
- CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- nat44_ei_hairpin_trace_t *t = va_arg (*args, nat44_ei_hairpin_trace_t *);
-
- s = format (s, "new dst addr %U port %u fib-index %u", format_ip4_address,
- &t->addr, clib_net_to_host_u16 (t->port), t->fib_index);
- if (~0 == t->session_index)
- {
- s = format (s, " is-static-mapping");
- }
- else
- {
- s = format (s, " session-index %u", t->session_index);
- }
-
- return s;
-}
-
-extern vnet_feature_arc_registration_t vnet_feat_arc_ip4_local;
-
-static_always_inline int
-nat44_ei_is_hairpinning (nat44_ei_main_t *nm, ip4_address_t *dst_addr)
-{
- nat44_ei_address_t *ap;
- clib_bihash_kv_8_8_t kv, value;
-
- vec_foreach (ap, nm->addresses)
- {
- if (ap->addr.as_u32 == dst_addr->as_u32)
- return 1;
- }
-
- init_nat_k (&kv, *dst_addr, 0, 0, 0);
- if (!clib_bihash_search_8_8 (&nm->static_mapping_by_external, &kv, &value))
- return 1;
-
- return 0;
-}
-
-#ifndef CLIB_MARCH_VARIANT
-void
-nat44_ei_hairpinning_sm_unknown_proto (nat44_ei_main_t *nm, vlib_buffer_t *b,
- ip4_header_t *ip)
-{
- clib_bihash_kv_8_8_t kv, value;
- nat44_ei_static_mapping_t *m;
- u32 old_addr, new_addr;
- ip_csum_t sum;
-
- init_nat_k (&kv, ip->dst_address, 0, 0, 0);
- if (clib_bihash_search_8_8 (&nm->static_mapping_by_external, &kv, &value))
- return;
-
- m = pool_elt_at_index (nm->static_mappings, value.value);
-
- old_addr = ip->dst_address.as_u32;
- new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32;
- sum = ip->checksum;
- sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address);
- ip->checksum = ip_csum_fold (sum);
-
- if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
- vnet_buffer (b)->sw_if_index[VLIB_TX] = m->fib_index;
-}
-#endif
-
-#ifndef CLIB_MARCH_VARIANT
-int
-nat44_ei_hairpinning (vlib_main_t *vm, vlib_node_runtime_t *node,
- nat44_ei_main_t *nm, u32 thread_index, vlib_buffer_t *b0,
- ip4_header_t *ip0, udp_header_t *udp0,
- tcp_header_t *tcp0, u32 proto0, int do_trace,
- u32 *required_thread_index)
-{
- nat44_ei_session_t *s0 = NULL;
- clib_bihash_kv_8_8_t kv0, value0;
- ip_csum_t sum0;
- u32 new_dst_addr0 = 0, old_dst_addr0, si = ~0;
- u16 new_dst_port0 = ~0, old_dst_port0;
- int rv;
- ip4_address_t sm0_addr;
- u16 sm0_port;
- u32 sm0_fib_index;
- u32 old_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
-
- /* Check if destination is static mappings */
- if (!nat44_ei_static_mapping_match (
- ip0->dst_address, udp0->dst_port, nm->outside_fib_index, proto0,
- &sm0_addr, &sm0_port, &sm0_fib_index, 1 /* by external */, 0, 0))
- {
- new_dst_addr0 = sm0_addr.as_u32;
- new_dst_port0 = sm0_port;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm0_fib_index;
- }
- /* or active session */
- else
- {
- init_nat_k (&kv0, ip0->dst_address, udp0->dst_port,
- nm->outside_fib_index, proto0);
- rv = clib_bihash_search_8_8 (&nm->out2in, &kv0, &value0);
- if (rv)
- {
- rv = 0;
- goto trace;
- }
-
- if (thread_index != nat_value_get_thread_index (&value0))
- {
- *required_thread_index = nat_value_get_thread_index (&value0);
- return 0;
- }
-
- si = nat_value_get_session_index (&value0);
- s0 = pool_elt_at_index (nm->per_thread_data[thread_index].sessions, si);
- new_dst_addr0 = s0->in2out.addr.as_u32;
- new_dst_port0 = s0->in2out.port;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
- }
-
- /* Check if anything has changed and if not, then return 0. This
- helps avoid infinite loop, repeating the three nodes
- nat44-hairpinning-->ip4-lookup-->ip4-local, in case nothing has
- changed. */
- old_dst_addr0 = ip0->dst_address.as_u32;
- old_dst_port0 = tcp0->dst;
- if (new_dst_addr0 == old_dst_addr0 && new_dst_port0 == old_dst_port0 &&
- vnet_buffer (b0)->sw_if_index[VLIB_TX] == old_sw_if_index)
- return 0;
-
- /* Destination is behind the same NAT, use internal address and port */
- if (new_dst_addr0)
- {
- old_dst_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address.as_u32 = new_dst_addr0;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0, ip4_header_t,
- dst_address);
- ip0->checksum = ip_csum_fold (sum0);
-
- old_dst_port0 = tcp0->dst;
- if (PREDICT_TRUE (new_dst_port0 != old_dst_port0))
- {
- if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
- {
- tcp0->dst = new_dst_port0;
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
- ip4_header_t, dst_address);
- sum0 = ip_csum_update (sum0, old_dst_port0, new_dst_port0,
- ip4_header_t /* cheat */, length);
- tcp0->checksum = ip_csum_fold (sum0);
- }
- else
- {
- udp0->dst_port = new_dst_port0;
- udp0->checksum = 0;
- }
- }
- else
- {
- if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
- {
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
- ip4_header_t, dst_address);
- tcp0->checksum = ip_csum_fold (sum0);
- }
- }
- rv = 1;
- goto trace;
- }
- rv = 0;
-trace:
- if (do_trace && PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
- (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat44_ei_hairpin_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
- t->addr.as_u32 = new_dst_addr0;
- t->port = new_dst_port0;
- t->fib_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
- if (s0)
- {
- t->session_index = si;
- }
- else
- {
- t->session_index = ~0;
- }
- }
- return rv;
-}
-#endif
-
-#ifndef CLIB_MARCH_VARIANT
-u32
-nat44_ei_icmp_hairpinning (nat44_ei_main_t *nm, vlib_buffer_t *b0,
- u32 thread_index, ip4_header_t *ip0,
- icmp46_header_t *icmp0, u32 *required_thread_index)
-{
- clib_bihash_kv_8_8_t kv0, value0;
- u32 old_dst_addr0, new_dst_addr0;
- u32 old_addr0, new_addr0;
- u16 old_port0, new_port0;
- u16 old_checksum0, new_checksum0;
- u32 si, ti = 0;
- ip_csum_t sum0;
- nat44_ei_session_t *s0;
- nat44_ei_static_mapping_t *m0;
-
- if (icmp_type_is_error_message (
- vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags))
- {
- ip4_header_t *inner_ip0 = 0;
- tcp_udp_header_t *l4_header = 0;
-
- inner_ip0 = (ip4_header_t *) ((icmp_echo_header_t *) (icmp0 + 1) + 1);
- l4_header = ip4_next_header (inner_ip0);
- u32 protocol = ip_proto_to_nat_proto (inner_ip0->protocol);
-
- if (protocol != NAT_PROTOCOL_TCP && protocol != NAT_PROTOCOL_UDP)
- return 1;
-
- init_nat_k (&kv0, ip0->dst_address, l4_header->src_port,
- nm->outside_fib_index, protocol);
- if (clib_bihash_search_8_8 (&nm->out2in, &kv0, &value0))
- return 1;
- ti = nat_value_get_thread_index (&value0);
- if (ti != thread_index)
- {
- *required_thread_index = ti;
- return 1;
- }
- si = nat_value_get_session_index (&value0);
- s0 = pool_elt_at_index (nm->per_thread_data[ti].sessions, si);
- new_dst_addr0 = s0->in2out.addr.as_u32;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
-
- /* update inner source IP address */
- old_addr0 = inner_ip0->src_address.as_u32;
- inner_ip0->src_address.as_u32 = new_dst_addr0;
- 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);
- icmp0->checksum = ip_csum_fold (sum0);
-
- /* update inner IP header checksum */
- old_checksum0 = inner_ip0->checksum;
- sum0 = inner_ip0->checksum;
- sum0 =
- ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, src_address);
- inner_ip0->checksum = ip_csum_fold (sum0);
- new_checksum0 = inner_ip0->checksum;
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_checksum0, new_checksum0, ip4_header_t,
- checksum);
- icmp0->checksum = ip_csum_fold (sum0);
-
- /* update inner source port */
- old_port0 = l4_header->src_port;
- l4_header->src_port = s0->in2out.port;
- new_port0 = l4_header->src_port;
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, old_port0, new_port0, tcp_udp_header_t,
- src_port);
- icmp0->checksum = ip_csum_fold (sum0);
- }
- else
- {
- init_nat_k (&kv0, ip0->dst_address, 0, nm->outside_fib_index, 0);
- if (clib_bihash_search_8_8 (&nm->static_mapping_by_external, &kv0,
- &value0))
- {
- icmp_echo_header_t *echo0 = (icmp_echo_header_t *) (icmp0 + 1);
- u16 icmp_id0 = echo0->identifier;
- init_nat_k (&kv0, ip0->dst_address, icmp_id0, nm->outside_fib_index,
- NAT_PROTOCOL_ICMP);
- int rv = clib_bihash_search_8_8 (&nm->out2in, &kv0, &value0);
- if (!rv)
- {
- ti = nat_value_get_thread_index (&value0);
- if (ti != thread_index)
- {
- *required_thread_index = ti;
- return 1;
- }
- si = nat_value_get_session_index (&value0);
- s0 = pool_elt_at_index (nm->per_thread_data[ti].sessions, si);
- new_dst_addr0 = s0->in2out.addr.as_u32;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
- echo0->identifier = s0->in2out.port;
- sum0 = icmp0->checksum;
- sum0 = ip_csum_update (sum0, icmp_id0, s0->in2out.port,
- icmp_echo_header_t, identifier);
- icmp0->checksum = ip_csum_fold (sum0);
- goto change_addr;
- }
-
- return 1;
- }
-
- m0 = pool_elt_at_index (nm->static_mappings, value0.value);
-
- new_dst_addr0 = m0->local_addr.as_u32;
- if (vnet_buffer (b0)->sw_if_index[VLIB_TX] == ~0)
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = m0->fib_index;
- }
-change_addr:
- /* Destination is behind the same NAT, use internal address and port */
- if (new_dst_addr0)
- {
- old_dst_addr0 = ip0->dst_address.as_u32;
- ip0->dst_address.as_u32 = new_dst_addr0;
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0, ip4_header_t,
- dst_address);
- ip0->checksum = ip_csum_fold (sum0);
- }
- return 0;
-}
-#endif
-
-void nat44_ei_hairpinning_unknown_proto (nat44_ei_main_t *nm, vlib_buffer_t *b,
- ip4_header_t *ip);
-
-#ifndef CLIB_MARCH_VARIANT
-void
-nat44_ei_hairpinning_unknown_proto (nat44_ei_main_t *nm, vlib_buffer_t *b,
- ip4_header_t *ip)
-{
- clib_bihash_kv_8_8_t kv, value;
- nat44_ei_static_mapping_t *m;
- u32 old_addr, new_addr;
- ip_csum_t sum;
-
- init_nat_k (&kv, ip->dst_address, 0, 0, 0);
- if (clib_bihash_search_8_8 (&nm->static_mapping_by_external, &kv, &value))
- return;
-
- m = pool_elt_at_index (nm->static_mappings, value.value);
-
- old_addr = ip->dst_address.as_u32;
- new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32;
- sum = ip->checksum;
- sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address);
- ip->checksum = ip_csum_fold (sum);
-
- if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
- vnet_buffer (b)->sw_if_index[VLIB_TX] = m->fib_index;
-}
-#endif
-
-VLIB_NODE_FN (nat44_ei_hairpin_src_node)
-(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
-{
- u32 n_left_from, *from, *to_next;
- nat44_ei_hairpin_src_next_t next_index;
- nat44_ei_main_t *nm = &nat44_ei_main;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0;
- nat44_ei_interface_t *i;
- u32 rx_sw_if_index0;
- u32 tx_sw_if_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);
- rx_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
- tx_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
-
- pool_foreach (i, nm->output_feature_interfaces)
- {
- /* Only packets from NAT inside interface */
- if ((nat44_ei_interface_is_inside (i)) &&
- (rx_sw_if_index0 == i->sw_if_index))
- {
- if (PREDICT_FALSE ((vnet_buffer (b0)->snat.flags) &
- NAT44_EI_FLAG_HAIRPINNING))
- {
- if (PREDICT_TRUE (nm->num_workers > 1))
- {
- next0 = NAT44_EI_HAIRPIN_SRC_NEXT_SNAT_IN2OUT_WH;
- goto skip_feature_next;
- }
- else
- {
- next0 = NAT44_EI_HAIRPIN_SRC_NEXT_SNAT_IN2OUT;
- goto skip_feature_next;
- }
- }
- break;
- }
- }
-
- vnet_feature_next (&next0, b0);
- skip_feature_next:
-
- if (next0 != NAT44_EI_HAIRPIN_SRC_NEXT_DROP)
- {
- vlib_increment_simple_counter (&nm->counters.hairpinning,
- vm->thread_index, tx_sw_if_index0,
- 1);
- }
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
- n_left_to_next, bi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- return frame->n_vectors;
-}
-
-VLIB_NODE_FN (nat44_ei_hairpin_dst_node)
-(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
-{
- u32 n_left_from, *from, *to_next;
- u32 thread_index = vm->thread_index;
- nat44_ei_hairpin_next_t next_index;
- nat44_ei_main_t *nm = &nat44_ei_main;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0;
- ip4_header_t *ip0;
- u32 proto0;
- u32 sw_if_index0;
- u32 required_thread_index = thread_index;
-
- /* 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_EI_HAIRPIN_NEXT_LOOKUP;
- ip0 = vlib_buffer_get_current (b0);
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
-
- proto0 = ip_proto_to_nat_proto (ip0->protocol);
-
- vnet_buffer (b0)->snat.flags = 0;
- if (PREDICT_FALSE (nat44_ei_is_hairpinning (nm, &ip0->dst_address)))
- {
- if (proto0 == NAT_PROTOCOL_TCP || proto0 == NAT_PROTOCOL_UDP)
- {
- udp_header_t *udp0 = ip4_next_header (ip0);
- tcp_header_t *tcp0 = (tcp_header_t *) udp0;
-
- nat44_ei_hairpinning (vm, node, nm, thread_index, b0, ip0,
- udp0, tcp0, proto0, 1 /* do_trace */,
- &required_thread_index);
- }
- else if (proto0 == NAT_PROTOCOL_ICMP)
- {
- icmp46_header_t *icmp0 = ip4_next_header (ip0);
-
- nat44_ei_icmp_hairpinning (nm, b0, thread_index, ip0, icmp0,
- &required_thread_index);
- }
- else
- {
- nat44_ei_hairpinning_unknown_proto (nm, b0, ip0);
- }
-
- vnet_buffer (b0)->snat.flags = NAT44_EI_FLAG_HAIRPINNING;
- }
-
- if (thread_index != required_thread_index)
- {
- vnet_buffer (b0)->snat.required_thread_index =
- required_thread_index;
- next0 = NAT44_EI_HAIRPIN_NEXT_HANDOFF;
- }
-
- if (next0 != NAT44_EI_HAIRPIN_NEXT_DROP)
- {
- vlib_increment_simple_counter (
- &nm->counters.hairpinning, vm->thread_index, sw_if_index0, 1);
- }
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
- n_left_to_next, bi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- return frame->n_vectors;
-}
-
-VLIB_NODE_FN (nat44_ei_hairpinning_node)
-(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
-{
- u32 n_left_from, *from, *to_next;
- u32 thread_index = vm->thread_index;
- nat44_ei_hairpin_next_t next_index;
- nat44_ei_main_t *nm = &nat44_ei_main;
- vnet_feature_main_t *fm = &feature_main;
- u8 arc_index = vnet_feat_arc_ip4_local.feature_arc_index;
- vnet_feature_config_main_t *cm = &fm->feature_config_mains[arc_index];
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0;
- ip4_header_t *ip0;
- u32 proto0;
- udp_header_t *udp0;
- tcp_header_t *tcp0;
- u32 sw_if_index0;
- u32 required_thread_index = thread_index;
-
- /* 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;
- sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
-
- proto0 = ip_proto_to_nat_proto (ip0->protocol);
- int next0_resolved = 0;
-
- if (nat44_ei_hairpinning (vm, node, nm, thread_index, b0, ip0, udp0,
- tcp0, proto0, 1 /* do_trace */,
- &required_thread_index))
- {
- next0 = NAT44_EI_HAIRPIN_NEXT_LOOKUP;
- next0_resolved = 1;
- }
-
- if (thread_index != required_thread_index)
- {
- vnet_buffer (b0)->snat.required_thread_index =
- required_thread_index;
- next0 = NAT44_EI_HAIRPIN_NEXT_HANDOFF;
- next0_resolved = 1;
- }
-
- if (!next0_resolved)
- vnet_get_config_data (&cm->config_main, &b0->current_config_index,
- &next0, 0);
-
- if (next0 != NAT44_EI_HAIRPIN_NEXT_DROP)
- {
- vlib_increment_simple_counter (
- &nm->counters.hairpinning, vm->thread_index, sw_if_index0, 1);
- }
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
- n_left_to_next, bi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- return frame->n_vectors;
-}
-
-VLIB_NODE_FN (nat44_ei_hairpinning_dst_handoff_node)
-(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
-{
- return nat44_ei_hairpinning_handoff_fn_inline (
- vm, node, frame, nat44_ei_main.hairpin_dst_fq_index);
-}
-
-VLIB_NODE_FN (nat44_ei_hairpinning_handoff_node)
-(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
-{
- return nat44_ei_hairpinning_handoff_fn_inline (
- vm, node, frame, nat44_ei_main.hairpinning_fq_index);
-}
-
-VLIB_REGISTER_NODE (nat44_ei_hairpinning_dst_handoff_node) = {
- .name = "nat44-ei-hairpin-dst-handoff",
- .vector_size = sizeof (u32),
- .n_errors = ARRAY_LEN(nat44_ei_hairpinning_handoff_error_strings),
- .error_strings = nat44_ei_hairpinning_handoff_error_strings,
- .format_trace = format_nat44_ei_hairpinning_handoff_trace,
-
- .n_next_nodes = 1,
-
- .next_nodes = {
- [0] = "error-drop",
- },
-};
-
-VLIB_REGISTER_NODE (nat44_ei_hairpinning_handoff_node) = {
- .name = "nat44-ei-hairpinning-handoff",
- .vector_size = sizeof (u32),
- .n_errors = ARRAY_LEN(nat44_ei_hairpinning_handoff_error_strings),
- .error_strings = nat44_ei_hairpinning_handoff_error_strings,
- .format_trace = format_nat44_ei_hairpinning_handoff_trace,
-
- .n_next_nodes = 1,
-
- .next_nodes = {
- [0] = "error-drop",
- },
-};
-
-VLIB_REGISTER_NODE (nat44_ei_hairpin_src_node) = {
- .name = "nat44-ei-hairpin-src",
- .vector_size = sizeof (u32),
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_next_nodes = NAT44_EI_HAIRPIN_SRC_N_NEXT,
- .next_nodes = {
- [NAT44_EI_HAIRPIN_SRC_NEXT_DROP] = "error-drop",
- [NAT44_EI_HAIRPIN_SRC_NEXT_SNAT_IN2OUT] = "nat44-ei-in2out-output",
- [NAT44_EI_HAIRPIN_SRC_NEXT_INTERFACE_OUTPUT] = "interface-output",
- [NAT44_EI_HAIRPIN_SRC_NEXT_SNAT_IN2OUT_WH] = "nat44-ei-in2out-output-worker-handoff",
- },
-};
-
-VLIB_REGISTER_NODE (nat44_ei_hairpin_dst_node) = {
- .name = "nat44-ei-hairpin-dst",
- .vector_size = sizeof (u32),
- .type = VLIB_NODE_TYPE_INTERNAL,
- .format_trace = format_nat44_ei_hairpin_trace,
- .n_next_nodes = NAT44_EI_HAIRPIN_N_NEXT,
- .next_nodes = {
- [NAT44_EI_HAIRPIN_NEXT_DROP] = "error-drop",
- [NAT44_EI_HAIRPIN_NEXT_LOOKUP] = "ip4-lookup",
- [NAT44_EI_HAIRPIN_NEXT_HANDOFF] = "nat44-ei-hairpin-dst-handoff",
- },
-};
-
-VLIB_REGISTER_NODE (nat44_ei_hairpinning_node) = {
- .name = "nat44-ei-hairpinning",
- .vector_size = sizeof (u32),
- .type = VLIB_NODE_TYPE_INTERNAL,
- .format_trace = format_nat44_ei_hairpin_trace,
- .n_next_nodes = NAT44_EI_HAIRPIN_N_NEXT,
- .next_nodes = {
- [NAT44_EI_HAIRPIN_NEXT_DROP] = "error-drop",
- [NAT44_EI_HAIRPIN_NEXT_LOOKUP] = "ip4-lookup",
- [NAT44_EI_HAIRPIN_NEXT_HANDOFF] = "nat44-ei-hairpinning-handoff",
- },
-};
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
#include <nat/lib/nat_inlines.h>
#include <nat/nat44-ei/nat44_ei_inlines.h>
#include <nat/nat44-ei/nat44_ei.h>
-#include <nat/nat44-ei/nat44_ei_hairpinning.h>
-typedef struct
-{
- u32 sw_if_index;
- u32 next_index;
- u32 session_index;
- u32 is_slow_path;
- u32 is_hairpinning;
-} nat44_ei_in2out_trace_t;
-
-/* packet trace format function */
-static u8 *
-format_nat44_ei_in2out_trace (u8 *s, va_list *args)
-{
- CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
- CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- nat44_ei_in2out_trace_t *t = va_arg (*args, nat44_ei_in2out_trace_t *);
- char *tag;
-
- tag = t->is_slow_path ? "NAT44_IN2OUT_SLOW_PATH" : "NAT44_IN2OUT_FAST_PATH";
-
- s = format (s, "%s: sw_if_index %d, next index %d, session %d", tag,
- t->sw_if_index, t->next_index, t->session_index);
- if (t->is_hairpinning)
- {
- s = format (s, ", with-hairpinning");
- }
-
- return s;
-}
-
-static u8 *
-format_nat44_ei_in2out_fast_trace (u8 *s, va_list *args)
-{
- CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
- CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- nat44_ei_in2out_trace_t *t = va_arg (*args, nat44_ei_in2out_trace_t *);
-
- s = format (s, "NAT44_IN2OUT_FAST: sw_if_index %d, next index %d",
- t->sw_if_index, t->next_index);
-
- return s;
-}
+extern vnet_feature_arc_registration_t vnet_feat_arc_ip4_local;
#define foreach_nat44_ei_in2out_error \
_ (UNSUPPORTED_PROTOCOL, "unsupported protocol") \
_ (MAX_SESSIONS_EXCEEDED, "maximum sessions exceeded") \
_ (CANNOT_CREATE_USER, "cannot create NAT user")
+#define foreach_nat44_ei_hairpinning_handoff_error \
+ _ (CONGESTION_DROP, "congestion drop")
+
typedef enum
{
#define _(sym, str) NAT44_EI_IN2OUT_ERROR_##sym,
#undef _
};
+typedef enum
+{
+#define _(sym, str) NAT44_EI_HAIRPINNING_HANDOFF_ERROR_##sym,
+ foreach_nat44_ei_hairpinning_handoff_error
+#undef _
+ NAT44_EI_HAIRPINNING_HANDOFF_N_ERROR,
+} nat44_ei_hairpinning_handoff_error_t;
+
+static char *nat44_ei_hairpinning_handoff_error_strings[] = {
+#define _(sym, string) string,
+ foreach_nat44_ei_hairpinning_handoff_error
+#undef _
+};
+
typedef enum
{
NAT44_EI_IN2OUT_NEXT_LOOKUP,
NAT44_EI_IN2OUT_HAIRPINNING_FINISH_N_NEXT,
} nat44_ei_in2out_hairpinnig_finish_next_t;
-static inline int
+typedef enum
+{
+ NAT44_EI_HAIRPIN_NEXT_LOOKUP,
+ NAT44_EI_HAIRPIN_NEXT_DROP,
+ NAT44_EI_HAIRPIN_NEXT_HANDOFF,
+ NAT44_EI_HAIRPIN_N_NEXT,
+} nat44_ei_hairpin_next_t;
+
+typedef struct
+{
+ u32 sw_if_index;
+ u32 next_index;
+ u32 session_index;
+ u32 is_slow_path;
+ u32 is_hairpinning;
+} nat44_ei_in2out_trace_t;
+
+typedef struct
+{
+ ip4_address_t addr;
+ u16 port;
+ u32 fib_index;
+ u32 session_index;
+} nat44_ei_hairpin_trace_t;
+
+typedef struct
+{
+ u32 next_worker_index;
+} nat44_ei_hairpinning_handoff_trace_t;
+
+static u8 *
+format_nat44_ei_in2out_trace (u8 *s, va_list *args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ nat44_ei_in2out_trace_t *t = va_arg (*args, nat44_ei_in2out_trace_t *);
+ char *tag;
+ tag = t->is_slow_path ? "NAT44_IN2OUT_SLOW_PATH" : "NAT44_IN2OUT_FAST_PATH";
+ s = format (s, "%s: sw_if_index %d, next index %d, session %d", tag,
+ t->sw_if_index, t->next_index, t->session_index);
+ if (t->is_hairpinning)
+ s = format (s, ", with-hairpinning");
+ return s;
+}
+
+static u8 *
+format_nat44_ei_in2out_fast_trace (u8 *s, va_list *args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ nat44_ei_in2out_trace_t *t = va_arg (*args, nat44_ei_in2out_trace_t *);
+ s = format (s, "NAT44_IN2OUT_FAST: sw_if_index %d, next index %d",
+ t->sw_if_index, t->next_index);
+ return s;
+}
+
+static u8 *
+format_nat44_ei_hairpin_trace (u8 *s, va_list *args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ nat44_ei_hairpin_trace_t *t = va_arg (*args, nat44_ei_hairpin_trace_t *);
+
+ s = format (s, "new dst addr %U port %u fib-index %u", format_ip4_address,
+ &t->addr, clib_net_to_host_u16 (t->port), t->fib_index);
+ if (~0 == t->session_index)
+ {
+ s = format (s, " is-static-mapping");
+ }
+ else
+ {
+ s = format (s, " session-index %u", t->session_index);
+ }
+
+ return s;
+}
+
+static u8 *
+format_nat44_ei_hairpinning_handoff_trace (u8 *s, va_list *args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ nat44_ei_hairpinning_handoff_trace_t *t =
+ va_arg (*args, nat44_ei_hairpinning_handoff_trace_t *);
+
+ s = format (s, "nat44-ei-hairpinning-handoff: next-worker %d",
+ t->next_worker_index);
+
+ return s;
+}
+
+static_always_inline int
nat44_ei_not_translate_fast (vlib_node_runtime_t *node, u32 sw_if_index0,
ip4_header_t *ip0, u32 proto0, u32 rx_fib_index0)
{
return 1;
}
-static inline int
+static_always_inline int
nat44_ei_not_translate (nat44_ei_main_t *nm, vlib_node_runtime_t *node,
u32 sw_if_index0, ip4_header_t *ip0, u32 proto0,
u32 rx_fib_index0, u32 thread_index)
rx_fib_index0);
}
-static inline int
+static_always_inline int
nat44_ei_not_translate_output_feature (nat44_ei_main_t *nm, ip4_header_t *ip0,
u32 proto0, u16 src_port, u16 dst_port,
u32 thread_index, u32 sw_if_index)
return next0;
}
-#ifndef CLIB_MARCH_VARIANT
static_always_inline nat44_ei_in2out_error_t
icmp_get_key (vlib_buffer_t *b, ip4_header_t *ip0, ip4_address_t *addr,
u16 *port, nat_protocol_t *nat_proto)
return -1; /* success */
}
-/**
- * Get address and port values to be used for ICMP packet translation
- * and create session if needed
- *
- * @param[in,out] nm NAT main
- * @param[in,out] node NAT node runtime
- * @param[in] thread_index thread index
- * @param[in,out] b0 buffer containing packet to be translated
- * @param[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
- * @param d optional parameter
- * @param e optional parameter
- */
-u32
+static_always_inline u32
nat44_ei_icmp_match_in2out_slow (vlib_node_runtime_t *node, u32 thread_index,
vlib_buffer_t *b0, ip4_header_t *ip0,
ip4_address_t *addr, u16 *port,
*p_s0 = s0;
return next0;
}
-#endif
-#ifndef CLIB_MARCH_VARIANT
-u32
+static_always_inline u32
nat44_ei_icmp_match_in2out_fast (vlib_node_runtime_t *node, u32 thread_index,
vlib_buffer_t *b0, ip4_header_t *ip0,
ip4_address_t *addr, u16 *port,
out:
return next0;
}
-#endif
-u32 nat44_ei_icmp_in2out (vlib_buffer_t *b0, ip4_header_t *ip0,
- icmp46_header_t *icmp0, u32 sw_if_index0,
- u32 rx_fib_index0, vlib_node_runtime_t *node,
- u32 next0, u32 thread_index,
- nat44_ei_session_t **p_s0);
+static_always_inline u32
+nat44_ei_icmp_hairpinning (nat44_ei_main_t *nm, vlib_buffer_t *b0,
+ u32 thread_index, ip4_header_t *ip0,
+ icmp46_header_t *icmp0, u32 *required_thread_index)
+{
+ clib_bihash_kv_8_8_t kv0, value0;
+ u32 old_dst_addr0, new_dst_addr0;
+ u32 old_addr0, new_addr0;
+ u16 old_port0, new_port0;
+ u16 old_checksum0, new_checksum0;
+ u32 si, ti = 0;
+ ip_csum_t sum0;
+ nat44_ei_session_t *s0;
+ nat44_ei_static_mapping_t *m0;
-#ifndef CLIB_MARCH_VARIANT
-u32
+ if (icmp_type_is_error_message (
+ vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags))
+ {
+ ip4_header_t *inner_ip0 = 0;
+ tcp_udp_header_t *l4_header = 0;
+
+ inner_ip0 = (ip4_header_t *) ((icmp_echo_header_t *) (icmp0 + 1) + 1);
+ l4_header = ip4_next_header (inner_ip0);
+ u32 protocol = ip_proto_to_nat_proto (inner_ip0->protocol);
+
+ if (protocol != NAT_PROTOCOL_TCP && protocol != NAT_PROTOCOL_UDP)
+ return 1;
+
+ init_nat_k (&kv0, ip0->dst_address, l4_header->src_port,
+ nm->outside_fib_index, protocol);
+ if (clib_bihash_search_8_8 (&nm->out2in, &kv0, &value0))
+ return 1;
+ ti = nat_value_get_thread_index (&value0);
+ if (ti != thread_index)
+ {
+ *required_thread_index = ti;
+ return 1;
+ }
+ si = nat_value_get_session_index (&value0);
+ s0 = pool_elt_at_index (nm->per_thread_data[ti].sessions, si);
+ new_dst_addr0 = s0->in2out.addr.as_u32;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
+
+ /* update inner source IP address */
+ old_addr0 = inner_ip0->src_address.as_u32;
+ inner_ip0->src_address.as_u32 = new_dst_addr0;
+ 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);
+ icmp0->checksum = ip_csum_fold (sum0);
+
+ /* update inner IP header checksum */
+ old_checksum0 = inner_ip0->checksum;
+ sum0 = inner_ip0->checksum;
+ sum0 =
+ ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, src_address);
+ inner_ip0->checksum = ip_csum_fold (sum0);
+ new_checksum0 = inner_ip0->checksum;
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_checksum0, new_checksum0, ip4_header_t,
+ checksum);
+ icmp0->checksum = ip_csum_fold (sum0);
+
+ /* update inner source port */
+ old_port0 = l4_header->src_port;
+ l4_header->src_port = s0->in2out.port;
+ new_port0 = l4_header->src_port;
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, old_port0, new_port0, tcp_udp_header_t,
+ src_port);
+ icmp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ init_nat_k (&kv0, ip0->dst_address, 0, nm->outside_fib_index, 0);
+ if (clib_bihash_search_8_8 (&nm->static_mapping_by_external, &kv0,
+ &value0))
+ {
+ icmp_echo_header_t *echo0 = (icmp_echo_header_t *) (icmp0 + 1);
+ u16 icmp_id0 = echo0->identifier;
+ init_nat_k (&kv0, ip0->dst_address, icmp_id0, nm->outside_fib_index,
+ NAT_PROTOCOL_ICMP);
+ int rv = clib_bihash_search_8_8 (&nm->out2in, &kv0, &value0);
+ if (!rv)
+ {
+ ti = nat_value_get_thread_index (&value0);
+ if (ti != thread_index)
+ {
+ *required_thread_index = ti;
+ return 1;
+ }
+ si = nat_value_get_session_index (&value0);
+ s0 = pool_elt_at_index (nm->per_thread_data[ti].sessions, si);
+ new_dst_addr0 = s0->in2out.addr.as_u32;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
+ echo0->identifier = s0->in2out.port;
+ sum0 = icmp0->checksum;
+ sum0 = ip_csum_update (sum0, icmp_id0, s0->in2out.port,
+ icmp_echo_header_t, identifier);
+ icmp0->checksum = ip_csum_fold (sum0);
+ goto change_addr;
+ }
+
+ return 1;
+ }
+
+ m0 = pool_elt_at_index (nm->static_mappings, value0.value);
+
+ new_dst_addr0 = m0->local_addr.as_u32;
+ if (vnet_buffer (b0)->sw_if_index[VLIB_TX] == ~0)
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = m0->fib_index;
+ }
+change_addr:
+ /* Destination is behind the same NAT, use internal address and port */
+ if (new_dst_addr0)
+ {
+ old_dst_addr0 = ip0->dst_address.as_u32;
+ ip0->dst_address.as_u32 = new_dst_addr0;
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0, ip4_header_t,
+ dst_address);
+ ip0->checksum = ip_csum_fold (sum0);
+ }
+ return 0;
+}
+
+static_always_inline u32
nat44_ei_icmp_in2out (vlib_buffer_t *b0, ip4_header_t *ip0,
icmp46_header_t *icmp0, u32 sw_if_index0,
u32 rx_fib_index0, vlib_node_runtime_t *node, u32 next0,
out:
return next0;
}
-#endif
static_always_inline u32
nat44_ei_icmp_in2out_slow_path (nat44_ei_main_t *nm, vlib_buffer_t *b0,
return next0;
}
+static_always_inline void
+nat44_ei_hairpinning_sm_unknown_proto (nat44_ei_main_t *nm, vlib_buffer_t *b,
+ ip4_header_t *ip)
+{
+ clib_bihash_kv_8_8_t kv, value;
+ nat44_ei_static_mapping_t *m;
+ u32 old_addr, new_addr;
+ ip_csum_t sum;
+
+ init_nat_k (&kv, ip->dst_address, 0, 0, 0);
+ if (clib_bihash_search_8_8 (&nm->static_mapping_by_external, &kv, &value))
+ return;
+
+ m = pool_elt_at_index (nm->static_mappings, value.value);
+
+ old_addr = ip->dst_address.as_u32;
+ new_addr = ip->dst_address.as_u32 = m->local_addr.as_u32;
+ sum = ip->checksum;
+ sum = ip_csum_update (sum, old_addr, new_addr, ip4_header_t, dst_address);
+ ip->checksum = ip_csum_fold (sum);
+
+ if (vnet_buffer (b)->sw_if_index[VLIB_TX] == ~0)
+ vnet_buffer (b)->sw_if_index[VLIB_TX] = m->fib_index;
+}
+
static int
nat_in2out_sm_unknown_proto (nat44_ei_main_t *nm, vlib_buffer_t *b,
ip4_header_t *ip, u32 rx_fib_index)
return 0;
}
-static inline uword
+static_always_inline int
+nat44_ei_hairpinning (vlib_main_t *vm, vlib_node_runtime_t *node,
+ nat44_ei_main_t *nm, u32 thread_index, vlib_buffer_t *b0,
+ ip4_header_t *ip0, udp_header_t *udp0,
+ tcp_header_t *tcp0, u32 proto0, int do_trace,
+ u32 *required_thread_index)
+{
+ nat44_ei_session_t *s0 = NULL;
+ clib_bihash_kv_8_8_t kv0, value0;
+ ip_csum_t sum0;
+ u32 new_dst_addr0 = 0, old_dst_addr0, si = ~0;
+ u16 new_dst_port0 = ~0, old_dst_port0;
+ int rv;
+ ip4_address_t sm0_addr;
+ u16 sm0_port;
+ u32 sm0_fib_index;
+ u32 old_sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+
+ /* Check if destination is static mappings */
+ if (!nat44_ei_static_mapping_match (
+ ip0->dst_address, udp0->dst_port, nm->outside_fib_index, proto0,
+ &sm0_addr, &sm0_port, &sm0_fib_index, 1 /* by external */, 0, 0))
+ {
+ new_dst_addr0 = sm0_addr.as_u32;
+ new_dst_port0 = sm0_port;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm0_fib_index;
+ }
+ /* or active session */
+ else
+ {
+ init_nat_k (&kv0, ip0->dst_address, udp0->dst_port,
+ nm->outside_fib_index, proto0);
+ rv = clib_bihash_search_8_8 (&nm->out2in, &kv0, &value0);
+ if (rv)
+ {
+ rv = 0;
+ goto trace;
+ }
+
+ if (thread_index != nat_value_get_thread_index (&value0))
+ {
+ *required_thread_index = nat_value_get_thread_index (&value0);
+ return 0;
+ }
+
+ si = nat_value_get_session_index (&value0);
+ s0 = pool_elt_at_index (nm->per_thread_data[thread_index].sessions, si);
+ new_dst_addr0 = s0->in2out.addr.as_u32;
+ new_dst_port0 = s0->in2out.port;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = s0->in2out.fib_index;
+ }
+
+ /* Check if anything has changed and if not, then return 0. This
+ helps avoid infinite loop, repeating the three nodes
+ nat44-hairpinning-->ip4-lookup-->ip4-local, in case nothing has
+ changed. */
+ old_dst_addr0 = ip0->dst_address.as_u32;
+ old_dst_port0 = tcp0->dst;
+ if (new_dst_addr0 == old_dst_addr0 && new_dst_port0 == old_dst_port0 &&
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] == old_sw_if_index)
+ return 0;
+
+ /* Destination is behind the same NAT, use internal address and port */
+ if (new_dst_addr0)
+ {
+ old_dst_addr0 = ip0->dst_address.as_u32;
+ ip0->dst_address.as_u32 = new_dst_addr0;
+ sum0 = ip0->checksum;
+ sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0, ip4_header_t,
+ dst_address);
+ ip0->checksum = ip_csum_fold (sum0);
+
+ old_dst_port0 = tcp0->dst;
+ if (PREDICT_TRUE (new_dst_port0 != old_dst_port0))
+ {
+ if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
+ {
+ tcp0->dst = new_dst_port0;
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
+ ip4_header_t, dst_address);
+ sum0 = ip_csum_update (sum0, old_dst_port0, new_dst_port0,
+ ip4_header_t /* cheat */, length);
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ else
+ {
+ udp0->dst_port = new_dst_port0;
+ udp0->checksum = 0;
+ }
+ }
+ else
+ {
+ if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
+ {
+ sum0 = tcp0->checksum;
+ sum0 = ip_csum_update (sum0, old_dst_addr0, new_dst_addr0,
+ ip4_header_t, dst_address);
+ tcp0->checksum = ip_csum_fold (sum0);
+ }
+ }
+ rv = 1;
+ goto trace;
+ }
+ rv = 0;
+trace:
+ if (do_trace && PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
+ (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat44_ei_hairpin_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->addr.as_u32 = new_dst_addr0;
+ t->port = new_dst_port0;
+ t->fib_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+ if (s0)
+ {
+ t->session_index = si;
+ }
+ else
+ {
+ t->session_index = ~0;
+ }
+ }
+ return rv;
+}
+
+static_always_inline uword
+nat44_ei_hairpinning_handoff_fn_inline (vlib_main_t *vm,
+ vlib_node_runtime_t *node,
+ vlib_frame_t *frame, u32 fq_index)
+{
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
+ u32 n_enq, n_left_from, *from;
+ u16 thread_indices[VLIB_FRAME_SIZE], *ti;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ vlib_get_buffers (vm, from, bufs, n_left_from);
+
+ b = bufs;
+ ti = thread_indices;
+
+ while (n_left_from > 0)
+ {
+ ti[0] = vnet_buffer (b[0])->snat.required_thread_index;
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
+ (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ nat44_ei_hairpinning_handoff_trace_t *t =
+ vlib_add_trace (vm, node, b[0], sizeof (*t));
+ t->next_worker_index = ti[0];
+ }
+
+ n_left_from -= 1;
+ ti += 1;
+ b += 1;
+ }
+ n_enq = vlib_buffer_enqueue_to_thread (vm, node, fq_index, from,
+ thread_indices, frame->n_vectors, 1);
+
+ if (n_enq < frame->n_vectors)
+ vlib_node_increment_counter (
+ vm, node->node_index, NAT44_EI_HAIRPINNING_HANDOFF_ERROR_CONGESTION_DROP,
+ frame->n_vectors - n_enq);
+ return frame->n_vectors;
+}
+
+static_always_inline uword
nat44_ei_in2out_node_fn_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
vlib_frame_t *frame, int is_slow_path,
int is_output_feature)
return frame->n_vectors;
}
-VLIB_NODE_FN (nat44_ei_in2out_node)
-(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
-{
- return nat44_ei_in2out_node_fn_inline (vm, node, frame, 0 /* is_slow_path */,
- 0);
-}
-
-VLIB_REGISTER_NODE (nat44_ei_in2out_node) = {
- .name = "nat44-ei-in2out",
- .vector_size = sizeof (u32),
- .format_trace = format_nat44_ei_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(nat44_ei_in2out_error_strings),
- .error_strings = nat44_ei_in2out_error_strings,
-
- .runtime_data_bytes = sizeof (nat44_ei_runtime_t),
-
- .n_next_nodes = NAT44_EI_IN2OUT_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [NAT44_EI_IN2OUT_NEXT_DROP] = "error-drop",
- [NAT44_EI_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
- [NAT44_EI_IN2OUT_NEXT_SLOW_PATH] = "nat44-ei-in2out-slowpath",
- [NAT44_EI_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [NAT44_EI_IN2OUT_NEXT_HAIRPINNING_HANDOFF] = "nat44-ei-in2out-hairpinning-handoff-ip4-lookup",
- },
-};
-
-VLIB_NODE_FN (nat44_ei_in2out_output_node)
-(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
-{
- return nat44_ei_in2out_node_fn_inline (vm, node, frame, 0 /* is_slow_path */,
- 1);
-}
-
-VLIB_REGISTER_NODE (nat44_ei_in2out_output_node) = {
- .name = "nat44-ei-in2out-output",
- .vector_size = sizeof (u32),
- .format_trace = format_nat44_ei_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(nat44_ei_in2out_error_strings),
- .error_strings = nat44_ei_in2out_error_strings,
-
- .runtime_data_bytes = sizeof (nat44_ei_runtime_t),
-
- .n_next_nodes = NAT44_EI_IN2OUT_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [NAT44_EI_IN2OUT_NEXT_DROP] = "error-drop",
- [NAT44_EI_IN2OUT_NEXT_LOOKUP] = "interface-output",
- [NAT44_EI_IN2OUT_NEXT_SLOW_PATH] = "nat44-ei-in2out-output-slowpath",
- [NAT44_EI_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [NAT44_EI_IN2OUT_NEXT_HAIRPINNING_HANDOFF] = "nat44-ei-in2out-hairpinning-handoff-interface-output",
- },
-};
-
-VLIB_NODE_FN (nat44_ei_in2out_slowpath_node)
-(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
-{
- return nat44_ei_in2out_node_fn_inline (vm, node, frame, 1 /* is_slow_path */,
- 0);
-}
-
-VLIB_REGISTER_NODE (nat44_ei_in2out_slowpath_node) = {
- .name = "nat44-ei-in2out-slowpath",
- .vector_size = sizeof (u32),
- .format_trace = format_nat44_ei_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(nat44_ei_in2out_error_strings),
- .error_strings = nat44_ei_in2out_error_strings,
-
- .runtime_data_bytes = sizeof (nat44_ei_runtime_t),
-
- .n_next_nodes = NAT44_EI_IN2OUT_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [NAT44_EI_IN2OUT_NEXT_DROP] = "error-drop",
- [NAT44_EI_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
- [NAT44_EI_IN2OUT_NEXT_SLOW_PATH] = "nat44-ei-in2out-slowpath",
- [NAT44_EI_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [NAT44_EI_IN2OUT_NEXT_HAIRPINNING_HANDOFF] = "nat44-ei-in2out-hairpinning-handoff-ip4-lookup",
- },
-};
-
-VLIB_NODE_FN (nat44_ei_in2out_output_slowpath_node)
-(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
-{
- return nat44_ei_in2out_node_fn_inline (vm, node, frame, 1 /* is_slow_path */,
- 1);
-}
-
-VLIB_REGISTER_NODE (nat44_ei_in2out_output_slowpath_node) = {
- .name = "nat44-ei-in2out-output-slowpath",
- .vector_size = sizeof (u32),
- .format_trace = format_nat44_ei_in2out_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(nat44_ei_in2out_error_strings),
- .error_strings = nat44_ei_in2out_error_strings,
-
- .runtime_data_bytes = sizeof (nat44_ei_runtime_t),
-
- .n_next_nodes = NAT44_EI_IN2OUT_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [NAT44_EI_IN2OUT_NEXT_DROP] = "error-drop",
- [NAT44_EI_IN2OUT_NEXT_LOOKUP] = "interface-output",
- [NAT44_EI_IN2OUT_NEXT_SLOW_PATH] = "nat44-ei-in2out-output-slowpath",
- [NAT44_EI_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [NAT44_EI_IN2OUT_NEXT_HAIRPINNING_HANDOFF] = "nat44-ei-in2out-hairpinning-handoff-interface-output",
- },
-};
-
-VLIB_NODE_FN (nat44_ei_in2out_fast_node)
-(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+static_always_inline uword
+nat44_ei_in2out_hairpinning_finish_inline (vlib_main_t *vm,
+ vlib_node_runtime_t *node,
+ vlib_frame_t *frame)
{
u32 n_left_from, *from, *to_next;
u32 thread_index = vm->thread_index;
u32 next0;
u32 sw_if_index0;
ip4_header_t *ip0;
- ip_csum_t sum0;
- u32 new_addr0, old_addr0;
- u16 old_port0, new_port0;
udp_header_t *udp0;
tcp_header_t *tcp0;
icmp46_header_t *icmp0;
u32 proto0;
- u32 rx_fib_index0;
- ip4_address_t sm0_addr;
- u16 sm0_port;
- u32 sm0_fib_index;
u32 required_thread_index = thread_index;
- /* speculatively enqueue b0 to the current next frame */
bi0 = from[0];
to_next[0] = bi0;
from += 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
- next0 = NAT44_EI_IN2OUT_NEXT_LOOKUP;
+ next0 = NAT44_EI_IN2OUT_HAIRPINNING_FINISH_NEXT_LOOKUP;
ip0 = vlib_buffer_get_current (b0);
udp0 = ip4_next_header (ip0);
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);
-
- 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_EI_IN2OUT_NEXT_ICMP_ERROR;
- goto trace0;
- }
-
proto0 = ip_proto_to_nat_proto (ip0->protocol);
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_OTHER))
- goto trace0;
-
- if (PREDICT_FALSE (proto0 == NAT_PROTOCOL_ICMP))
- {
- next0 = nat44_ei_icmp_in2out (b0, ip0, icmp0, sw_if_index0,
- rx_fib_index0, node, next0, ~0, 0);
- goto trace0;
- }
-
- if (nat44_ei_static_mapping_match (
- ip0->src_address, udp0->src_port, rx_fib_index0, proto0,
- &sm0_addr, &sm0_port, &sm0_fib_index, 0, 0, 0))
- {
- b0->error = node->errors[NAT44_EI_IN2OUT_ERROR_NO_TRANSLATION];
- next0 = NAT44_EI_IN2OUT_NEXT_DROP;
- goto trace0;
- }
-
- new_addr0 = sm0_addr.as_u32;
- new_port0 = sm0_port;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = sm0_fib_index;
- old_addr0 = ip0->src_address.as_u32;
- ip0->src_address.as_u32 = new_addr0;
-
- sum0 = ip0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- src_address /* changed member */ );
- ip0->checksum = ip_csum_fold (sum0);
-
- if (PREDICT_FALSE (new_port0 != udp0->dst_port))
- {
- old_port0 = udp0->src_port;
- udp0->src_port = new_port0;
-
- if (PREDICT_TRUE (proto0 == NAT_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 */ );
- mss_clamping (nm->mss_clamping, tcp0, &sum0);
- 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);
- }
- }
- else
+ switch (proto0)
{
- if (PREDICT_TRUE (proto0 == NAT_PROTOCOL_TCP))
- {
- sum0 = tcp0->checksum;
- sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
- ip4_header_t,
- dst_address /* changed member */ );
- mss_clamping (nm->mss_clamping, tcp0, &sum0);
- 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);
- }
+ case NAT_PROTOCOL_TCP:
+ // fallthrough
+ case NAT_PROTOCOL_UDP:
+ is_hairpinning = nat44_ei_hairpinning (
+ vm, node, nm, thread_index, b0, ip0, udp0, tcp0, proto0,
+ 0 /* do_trace */, &required_thread_index);
+ break;
+ case NAT_PROTOCOL_ICMP:
+ is_hairpinning = (0 == nat44_ei_icmp_hairpinning (
+ nm, b0, thread_index, ip0, icmp0,
+ &required_thread_index));
+ break;
+ case NAT_PROTOCOL_OTHER:
+ // this should never happen
+ next0 = NAT44_EI_IN2OUT_HAIRPINNING_FINISH_NEXT_DROP;
+ break;
}
- /* Hairpinning */
- is_hairpinning = nat44_ei_hairpinning (
- vm, node, nm, thread_index, b0, ip0, udp0, tcp0, proto0,
- 0 /* do_trace */, &required_thread_index);
-
if (thread_index != required_thread_index)
{
- vnet_buffer (b0)->snat.required_thread_index =
- required_thread_index;
- next0 = NAT44_EI_IN2OUT_NEXT_HAIRPINNING_HANDOFF;
+ // but we already did a handoff ...
+ next0 = NAT44_EI_IN2OUT_HAIRPINNING_FINISH_NEXT_DROP;
}
- trace0:
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
+ (b0->flags & VLIB_BUFFER_IS_TRACED)))
{
nat44_ei_in2out_trace_t *t =
vlib_add_trace (vm, node, b0, sizeof (*t));
t->is_hairpinning = is_hairpinning;
}
- if (next0 != NAT44_EI_IN2OUT_NEXT_DROP)
+ if (next0 != NAT44_EI_IN2OUT_HAIRPINNING_FINISH_NEXT_DROP)
{
-
vlib_increment_simple_counter (
&nm->counters.fastpath.in2out.other, sw_if_index0,
vm->thread_index, 1);
}
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, next0);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
return frame->n_vectors;
}
-VLIB_REGISTER_NODE (nat44_ei_in2out_fast_node) = {
- .name = "nat44-ei-in2out-fast",
- .vector_size = sizeof (u32),
- .format_trace = format_nat44_ei_in2out_fast_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
-
- .n_errors = ARRAY_LEN(nat44_ei_in2out_error_strings),
- .error_strings = nat44_ei_in2out_error_strings,
-
- .runtime_data_bytes = sizeof (nat44_ei_runtime_t),
-
- .n_next_nodes = NAT44_EI_IN2OUT_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [NAT44_EI_IN2OUT_NEXT_DROP] = "error-drop",
- [NAT44_EI_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
- [NAT44_EI_IN2OUT_NEXT_SLOW_PATH] = "nat44-ei-in2out-slowpath",
- [NAT44_EI_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
- [NAT44_EI_IN2OUT_NEXT_HAIRPINNING_HANDOFF] = "nat44-ei-in2out-hairpinning-handoff-ip4-lookup",
- },
-};
-
-VLIB_NODE_FN (nat44_ei_in2out_hairpinning_handoff_ip4_lookup_node)
+VLIB_NODE_FN (nat44_ei_hairpinning_node)
(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
-{
- return nat44_ei_hairpinning_handoff_fn_inline (
- vm, node, frame,
- nat44_ei_main.in2out_hairpinning_finish_ip4_lookup_node_fq_index);
-}
-
-VLIB_REGISTER_NODE (nat44_ei_in2out_hairpinning_handoff_ip4_lookup_node) = {
- .name = "nat44-ei-in2out-hairpinning-handoff-ip4-lookup",
- .vector_size = sizeof (u32),
- .n_errors = ARRAY_LEN(nat44_ei_hairpinning_handoff_error_strings),
- .error_strings = nat44_ei_hairpinning_handoff_error_strings,
- .format_trace = format_nat44_ei_hairpinning_handoff_trace,
-
- .n_next_nodes = 1,
-
- .next_nodes = {
- [0] = "error-drop",
- },
-};
-
-VLIB_NODE_FN (nat44_ei_in2out_hairpinning_handoff_interface_output_node)
-(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
-{
- return nat44_ei_hairpinning_handoff_fn_inline (
- vm, node, frame,
- nat44_ei_main.in2out_hairpinning_finish_interface_output_node_fq_index);
-}
-
-VLIB_REGISTER_NODE (nat44_ei_in2out_hairpinning_handoff_interface_output_node) = {
- .name = "nat44-ei-in2out-hairpinning-handoff-interface-output",
- .vector_size = sizeof (u32),
- .n_errors = ARRAY_LEN(nat44_ei_hairpinning_handoff_error_strings),
- .error_strings = nat44_ei_hairpinning_handoff_error_strings,
- .format_trace = format_nat44_ei_hairpinning_handoff_trace,
-
- .n_next_nodes = 1,
-
- .next_nodes = {
- [0] = "error-drop",
- },
-};
-
-static_always_inline int
-nat44_ei_in2out_hairpinning_finish_inline (vlib_main_t *vm,
- vlib_node_runtime_t *node,
- vlib_frame_t *frame)
{
u32 n_left_from, *from, *to_next;
u32 thread_index = vm->thread_index;
- nat44_ei_in2out_next_t next_index;
+ nat44_ei_hairpin_next_t next_index;
nat44_ei_main_t *nm = &nat44_ei_main;
- int is_hairpinning = 0;
+ vnet_feature_main_t *fm = &feature_main;
+ u8 arc_index = vnet_feat_arc_ip4_local.feature_arc_index;
+ vnet_feature_config_main_t *cm = &fm->feature_config_mains[arc_index];
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
u32 bi0;
vlib_buffer_t *b0;
u32 next0;
- u32 sw_if_index0;
ip4_header_t *ip0;
+ u32 proto0;
udp_header_t *udp0;
tcp_header_t *tcp0;
- icmp46_header_t *icmp0;
- u32 proto0;
+ u32 sw_if_index0;
u32 required_thread_index = thread_index;
- /* speculatively enqueue b0 to the current next frame */
bi0 = from[0];
to_next[0] = bi0;
from += 1;
n_left_to_next -= 1;
b0 = vlib_get_buffer (vm, bi0);
- next0 = NAT44_EI_IN2OUT_HAIRPINNING_FINISH_NEXT_LOOKUP;
-
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];
+
proto0 = ip_proto_to_nat_proto (ip0->protocol);
+ int next0_resolved = 0;
- switch (proto0)
+ if (nat44_ei_hairpinning (vm, node, nm, thread_index, b0, ip0, udp0,
+ tcp0, proto0, 1, &required_thread_index))
{
- case NAT_PROTOCOL_TCP:
- // fallthrough
- case NAT_PROTOCOL_UDP:
- is_hairpinning = nat44_ei_hairpinning (
- vm, node, nm, thread_index, b0, ip0, udp0, tcp0, proto0,
- 0 /* do_trace */, &required_thread_index);
- break;
- case NAT_PROTOCOL_ICMP:
- is_hairpinning = (0 == nat44_ei_icmp_hairpinning (
- nm, b0, thread_index, ip0, icmp0,
- &required_thread_index));
- break;
- case NAT_PROTOCOL_OTHER:
- // this should never happen
- next0 = NAT44_EI_IN2OUT_HAIRPINNING_FINISH_NEXT_DROP;
- break;
+ next0 = NAT44_EI_HAIRPIN_NEXT_LOOKUP;
+ next0_resolved = 1;
}
if (thread_index != required_thread_index)
{
- // but we already did a handoff ...
- next0 = NAT44_EI_IN2OUT_HAIRPINNING_FINISH_NEXT_DROP;
+ vnet_buffer (b0)->snat.required_thread_index =
+ required_thread_index;
+ next0 = NAT44_EI_HAIRPIN_NEXT_HANDOFF;
+ next0_resolved = 1;
}
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
- (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- nat44_ei_in2out_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->is_hairpinning = is_hairpinning;
- }
+ if (!next0_resolved)
+ vnet_get_config_data (&cm->config_main, &b0->current_config_index,
+ &next0, 0);
- if (next0 != NAT44_EI_IN2OUT_HAIRPINNING_FINISH_NEXT_DROP)
+ if (next0 != NAT44_EI_HAIRPIN_NEXT_DROP)
{
vlib_increment_simple_counter (
- &nm->counters.fastpath.in2out.other, sw_if_index0,
- vm->thread_index, 1);
+ &nm->counters.hairpinning, vm->thread_index, sw_if_index0, 1);
}
- /* 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);
}
return frame->n_vectors;
}
+VLIB_NODE_FN (nat44_ei_in2out_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ return nat44_ei_in2out_node_fn_inline (vm, node, frame, 0, 0);
+}
+
+VLIB_NODE_FN (nat44_ei_in2out_output_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ return nat44_ei_in2out_node_fn_inline (vm, node, frame, 0, 1);
+}
+
+VLIB_NODE_FN (nat44_ei_in2out_slowpath_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ return nat44_ei_in2out_node_fn_inline (vm, node, frame, 1, 0);
+}
+
+VLIB_NODE_FN (nat44_ei_in2out_output_slowpath_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ return nat44_ei_in2out_node_fn_inline (vm, node, frame, 1, 1);
+}
+
+VLIB_NODE_FN (nat44_ei_in2out_hairpinning_handoff_ip4_lookup_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ return nat44_ei_hairpinning_handoff_fn_inline (
+ vm, node, frame,
+ nat44_ei_main.in2out_hairpinning_finish_ip4_lookup_node_fq_index);
+}
+
+VLIB_NODE_FN (nat44_ei_in2out_hairpinning_handoff_interface_output_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ return nat44_ei_hairpinning_handoff_fn_inline (
+ vm, node, frame,
+ nat44_ei_main.in2out_hairpinning_finish_interface_output_node_fq_index);
+}
+
VLIB_NODE_FN (nat44_ei_in2out_hairpinning_finish_ip4_lookup_node)
(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
{
return nat44_ei_in2out_hairpinning_finish_inline (vm, node, frame);
}
-VLIB_REGISTER_NODE (nat44_ei_in2out_hairpinning_finish_ip4_lookup_node) = {
- .name = "nat44-ei-in2out-hairpinning-finish-ip4-lookup",
+VLIB_NODE_FN (nat44_ei_in2out_hairpinning_finish_interface_output_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ return nat44_ei_in2out_hairpinning_finish_inline (vm, node, frame);
+}
+
+VLIB_NODE_FN (nat44_ei_hairpinning_handoff_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ return nat44_ei_hairpinning_handoff_fn_inline (
+ vm, node, frame, nat44_ei_main.hairpinning_fq_index);
+}
+
+VLIB_REGISTER_NODE (nat44_ei_in2out_node) = {
+ .name = "nat44-ei-in2out",
.vector_size = sizeof (u32),
- .format_trace = format_nat44_ei_in2out_fast_trace,
+ .format_trace = format_nat44_ei_in2out_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat44_ei_in2out_error_strings),
+ .error_strings = nat44_ei_in2out_error_strings,
+ .runtime_data_bytes = sizeof (nat44_ei_runtime_t),
+ .n_next_nodes = NAT44_EI_IN2OUT_N_NEXT,
+ .next_nodes = {
+ [NAT44_EI_IN2OUT_NEXT_DROP] = "error-drop",
+ [NAT44_EI_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
+ [NAT44_EI_IN2OUT_NEXT_SLOW_PATH] = "nat44-ei-in2out-slowpath",
+ [NAT44_EI_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [NAT44_EI_IN2OUT_NEXT_HAIRPINNING_HANDOFF] = "nat44-ei-in2out-hairpinning-handoff-ip4-lookup",
+ },
+};
+VLIB_REGISTER_NODE (nat44_ei_in2out_output_node) = {
+ .name = "nat44-ei-in2out-output",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_ei_in2out_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = ARRAY_LEN(nat44_ei_in2out_error_strings),
.error_strings = nat44_ei_in2out_error_strings,
+ .runtime_data_bytes = sizeof (nat44_ei_runtime_t),
+ .n_next_nodes = NAT44_EI_IN2OUT_N_NEXT,
+ .next_nodes = {
+ [NAT44_EI_IN2OUT_NEXT_DROP] = "error-drop",
+ [NAT44_EI_IN2OUT_NEXT_LOOKUP] = "interface-output",
+ [NAT44_EI_IN2OUT_NEXT_SLOW_PATH] = "nat44-ei-in2out-output-slowpath",
+ [NAT44_EI_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [NAT44_EI_IN2OUT_NEXT_HAIRPINNING_HANDOFF] = "nat44-ei-in2out-hairpinning-handoff-interface-output",
+ },
+};
+VLIB_REGISTER_NODE (nat44_ei_in2out_slowpath_node) = {
+ .name = "nat44-ei-in2out-slowpath",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_ei_in2out_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat44_ei_in2out_error_strings),
+ .error_strings = nat44_ei_in2out_error_strings,
.runtime_data_bytes = sizeof (nat44_ei_runtime_t),
+ .n_next_nodes = NAT44_EI_IN2OUT_N_NEXT,
+ .next_nodes = {
+ [NAT44_EI_IN2OUT_NEXT_DROP] = "error-drop",
+ [NAT44_EI_IN2OUT_NEXT_LOOKUP] = "ip4-lookup",
+ [NAT44_EI_IN2OUT_NEXT_SLOW_PATH] = "nat44-ei-in2out-slowpath",
+ [NAT44_EI_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [NAT44_EI_IN2OUT_NEXT_HAIRPINNING_HANDOFF] = "nat44-ei-in2out-hairpinning-handoff-ip4-lookup",
+ },
+};
- .n_next_nodes = NAT44_EI_IN2OUT_HAIRPINNING_FINISH_N_NEXT,
+VLIB_REGISTER_NODE (nat44_ei_in2out_output_slowpath_node) = {
+ .name = "nat44-ei-in2out-output-slowpath",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_ei_in2out_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat44_ei_in2out_error_strings),
+ .error_strings = nat44_ei_in2out_error_strings,
+ .runtime_data_bytes = sizeof (nat44_ei_runtime_t),
+ .n_next_nodes = NAT44_EI_IN2OUT_N_NEXT,
+ .next_nodes = {
+ [NAT44_EI_IN2OUT_NEXT_DROP] = "error-drop",
+ [NAT44_EI_IN2OUT_NEXT_LOOKUP] = "interface-output",
+ [NAT44_EI_IN2OUT_NEXT_SLOW_PATH] = "nat44-ei-in2out-output-slowpath",
+ [NAT44_EI_IN2OUT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [NAT44_EI_IN2OUT_NEXT_HAIRPINNING_HANDOFF] = "nat44-ei-in2out-hairpinning-handoff-interface-output",
+ },
+};
+
+VLIB_REGISTER_NODE (nat44_ei_in2out_hairpinning_handoff_ip4_lookup_node) = {
+ .name = "nat44-ei-in2out-hairpinning-handoff-ip4-lookup",
+ .vector_size = sizeof (u32),
+ .n_errors = ARRAY_LEN(nat44_ei_hairpinning_handoff_error_strings),
+ .error_strings = nat44_ei_hairpinning_handoff_error_strings,
+ .format_trace = format_nat44_ei_hairpinning_handoff_trace,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
- /* edit / add dispositions here */
+VLIB_REGISTER_NODE (nat44_ei_in2out_hairpinning_handoff_interface_output_node) = {
+ .name = "nat44-ei-in2out-hairpinning-handoff-interface-output",
+ .vector_size = sizeof (u32),
+ .n_errors = ARRAY_LEN(nat44_ei_hairpinning_handoff_error_strings),
+ .error_strings = nat44_ei_hairpinning_handoff_error_strings,
+ .format_trace = format_nat44_ei_hairpinning_handoff_trace,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+
+VLIB_REGISTER_NODE (nat44_ei_in2out_hairpinning_finish_ip4_lookup_node) = {
+ .name = "nat44-ei-in2out-hairpinning-finish-ip4-lookup",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nat44_ei_in2out_fast_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = ARRAY_LEN(nat44_ei_in2out_error_strings),
+ .error_strings = nat44_ei_in2out_error_strings,
+ .runtime_data_bytes = sizeof (nat44_ei_runtime_t),
+ .n_next_nodes = NAT44_EI_IN2OUT_HAIRPINNING_FINISH_N_NEXT,
.next_nodes = {
[NAT44_EI_IN2OUT_HAIRPINNING_FINISH_NEXT_DROP] = "error-drop",
[NAT44_EI_IN2OUT_HAIRPINNING_FINISH_NEXT_LOOKUP] = "ip4-lookup",
},
};
-VLIB_NODE_FN (nat44_ei_in2out_hairpinning_finish_interface_output_node)
-(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
-{
- return nat44_ei_in2out_hairpinning_finish_inline (vm, node, frame);
-}
-
VLIB_REGISTER_NODE (nat44_ei_in2out_hairpinning_finish_interface_output_node) = {
.name = "nat44-ei-in2out-hairpinning-finish-interface-output",
.vector_size = sizeof (u32),
.format_trace = format_nat44_ei_in2out_fast_trace,
.type = VLIB_NODE_TYPE_INTERNAL,
-
.n_errors = ARRAY_LEN(nat44_ei_in2out_error_strings),
.error_strings = nat44_ei_in2out_error_strings,
-
.runtime_data_bytes = sizeof (nat44_ei_runtime_t),
-
.n_next_nodes = NAT44_EI_IN2OUT_HAIRPINNING_FINISH_N_NEXT,
-
- /* edit / add dispositions here */
.next_nodes = {
[NAT44_EI_IN2OUT_HAIRPINNING_FINISH_NEXT_DROP] = "error-drop",
[NAT44_EI_IN2OUT_HAIRPINNING_FINISH_NEXT_LOOKUP] = "interface-output",
},
};
+VLIB_REGISTER_NODE (nat44_ei_hairpinning_handoff_node) = {
+ .name = "nat44-ei-hairpinning-handoff",
+ .vector_size = sizeof (u32),
+ .n_errors = ARRAY_LEN(nat44_ei_hairpinning_handoff_error_strings),
+ .error_strings = nat44_ei_hairpinning_handoff_error_strings,
+ .format_trace = format_nat44_ei_hairpinning_handoff_trace,
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+
+VLIB_REGISTER_NODE (nat44_ei_hairpinning_node) = {
+ .name = "nat44-ei-hairpinning",
+ .vector_size = sizeof (u32),
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .format_trace = format_nat44_ei_hairpin_trace,
+ .n_next_nodes = NAT44_EI_HAIRPIN_N_NEXT,
+ .next_nodes = {
+ [NAT44_EI_HAIRPIN_NEXT_DROP] = "error-drop",
+ [NAT44_EI_HAIRPIN_NEXT_LOOKUP] = "ip4-lookup",
+ [NAT44_EI_HAIRPIN_NEXT_HANDOFF] = "nat44-ei-hairpinning-handoff",
+ },
+};
+
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / commitdiff