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Diffstat (limited to 'src/plugins/nat/nat44-ei/nat44_ei_hairpinning.c')
-rw-r--r--src/plugins/nat/nat44-ei/nat44_ei_hairpinning.c759
1 files changed, 0 insertions, 759 deletions
diff --git a/src/plugins/nat/nat44-ei/nat44_ei_hairpinning.c b/src/plugins/nat/nat44-ei/nat44_ei_hairpinning.c
deleted file mode 100644
index c3d3cfba386..00000000000
--- a/src/plugins/nat/nat44-ei/nat44_ei_hairpinning.c
+++ /dev/null
@@ -1,759 +0,0 @@
-/*
- * 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:
- */