--- /dev/null
+/*
+ * Copyright (c) 2015 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.
+ */
+/*
+ * Defines used for testing various optimisation schemes
+ */
+#define MAP_ENCAP_DUAL 0
+
+#include "map.h"
+#include <vnet/ip/ip_frag.h>
+#include <vnet/ip/ip4_to_ip6.h>
+
+vlib_node_registration_t ip4_map_reass_node;
+
+enum ip4_map_next_e
+{
+ IP4_MAP_NEXT_IP6_LOOKUP,
+#ifdef MAP_SKIP_IP6_LOOKUP
+ IP4_MAP_NEXT_IP6_REWRITE,
+#endif
+ IP4_MAP_NEXT_IP4_FRAGMENT,
+ IP4_MAP_NEXT_IP6_FRAGMENT,
+ IP4_MAP_NEXT_REASS,
+ IP4_MAP_NEXT_ICMP_ERROR,
+ IP4_MAP_NEXT_DROP,
+ IP4_MAP_N_NEXT,
+};
+
+enum ip4_map_reass_next_t
+{
+ IP4_MAP_REASS_NEXT_IP6_LOOKUP,
+ IP4_MAP_REASS_NEXT_IP4_FRAGMENT,
+ IP4_MAP_REASS_NEXT_DROP,
+ IP4_MAP_REASS_N_NEXT,
+};
+
+typedef struct
+{
+ u32 map_domain_index;
+ u16 port;
+ u8 cached;
+} map_ip4_map_reass_trace_t;
+
+u8 *
+format_ip4_map_reass_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 *);
+ map_ip4_map_reass_trace_t *t = va_arg (*args, map_ip4_map_reass_trace_t *);
+ return format (s, "MAP domain index: %d L4 port: %u Status: %s",
+ t->map_domain_index, t->port,
+ t->cached ? "cached" : "forwarded");
+}
+
+static_always_inline u16
+ip4_map_port_and_security_check (map_domain_t * d, ip4_header_t * ip,
+ u32 * next, u8 * error)
+{
+ u16 port = 0;
+
+ if (d->psid_length > 0)
+ {
+ if (ip4_get_fragment_offset (ip) == 0)
+ {
+ if (PREDICT_FALSE
+ ((ip->ip_version_and_header_length != 0x45)
+ || clib_host_to_net_u16 (ip->length) < 28))
+ {
+ return 0;
+ }
+ port = ip4_get_port (ip, 0);
+ if (port)
+ {
+ /* Verify that port is not among the well-known ports */
+ if ((d->psid_offset > 0)
+ && (clib_net_to_host_u16 (port) <
+ (0x1 << (16 - d->psid_offset))))
+ {
+ *error = MAP_ERROR_ENCAP_SEC_CHECK;
+ }
+ else
+ {
+ if (ip4_get_fragment_more (ip))
+ *next = IP4_MAP_NEXT_REASS;
+ return (port);
+ }
+ }
+ else
+ {
+ *error = MAP_ERROR_BAD_PROTOCOL;
+ }
+ }
+ else
+ {
+ *next = IP4_MAP_NEXT_REASS;
+ }
+ }
+ return (0);
+}
+
+/*
+ * ip4_map_vtcfl
+ */
+static_always_inline u32
+ip4_map_vtcfl (ip4_header_t * ip4, vlib_buffer_t * p)
+{
+ map_main_t *mm = &map_main;
+ u8 tc = mm->tc_copy ? ip4->tos : mm->tc;
+ u32 vtcfl = 0x6 << 28;
+ vtcfl |= tc << 20;
+ vtcfl |= vnet_buffer (p)->ip.flow_hash & 0x000fffff;
+
+ return (clib_host_to_net_u32 (vtcfl));
+}
+
+static_always_inline bool
+ip4_map_ip6_lookup_bypass (vlib_buffer_t * p0, ip4_header_t * ip)
+{
+#ifdef MAP_SKIP_IP6_LOOKUP
+ if (FIB_NODE_INDEX_INVALID != pre_resolved[FIB_PROTOCOL_IP6].fei)
+ {
+ vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
+ pre_resolved[FIB_PROTOCOL_IP6].dpo.dpoi_index;
+ return (true);
+ }
+#endif
+ return (false);
+}
+
+/*
+ * ip4_map_ttl
+ */
+static inline void
+ip4_map_decrement_ttl (ip4_header_t * ip, u8 * error)
+{
+ i32 ttl = ip->ttl;
+
+ /* Input node should have reject packets with ttl 0. */
+ ASSERT (ip->ttl > 0);
+
+ u32 checksum = ip->checksum + clib_host_to_net_u16 (0x0100);
+ checksum += checksum >= 0xffff;
+ ip->checksum = checksum;
+ ttl -= 1;
+ ip->ttl = ttl;
+ *error = ttl <= 0 ? IP4_ERROR_TIME_EXPIRED : *error;
+
+ /* Verify checksum. */
+ ASSERT (ip->checksum == ip4_header_checksum (ip));
+}
+
+static u32
+ip4_map_fragment (vlib_buffer_t * b, u16 mtu, bool df, u8 * error)
+{
+ map_main_t *mm = &map_main;
+
+ if (mm->frag_inner)
+ {
+ ip_frag_set_vnet_buffer (b, sizeof (ip6_header_t), mtu,
+ IP4_FRAG_NEXT_IP6_LOOKUP,
+ IP_FRAG_FLAG_IP6_HEADER);
+ return (IP4_MAP_NEXT_IP4_FRAGMENT);
+ }
+ else
+ {
+ if (df && !mm->frag_ignore_df)
+ {
+ icmp4_error_set_vnet_buffer (b, ICMP4_destination_unreachable,
+ ICMP4_destination_unreachable_fragmentation_needed_and_dont_fragment_set,
+ mtu);
+ vlib_buffer_advance (b, sizeof (ip6_header_t));
+ *error = MAP_ERROR_DF_SET;
+ return (IP4_MAP_NEXT_ICMP_ERROR);
+ }
+ ip_frag_set_vnet_buffer (b, 0, mtu, IP6_FRAG_NEXT_IP6_LOOKUP,
+ IP_FRAG_FLAG_IP6_HEADER);
+ return (IP4_MAP_NEXT_IP6_FRAGMENT);
+ }
+}
+
+/*
+ * ip4_map
+ */
+static uword
+ip4_map (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
+ vlib_node_runtime_t *error_node =
+ vlib_node_get_runtime (vm, ip4_map_node.index);
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+ map_main_t *mm = &map_main;
+ vlib_combined_counter_main_t *cm = mm->domain_counters;
+ u32 thread_index = vlib_get_thread_index ();
+
+ while (n_left_from > 0)
+ {
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ /* Dual loop */
+ while (n_left_from >= 4 && n_left_to_next >= 2)
+ {
+ u32 pi0, pi1;
+ vlib_buffer_t *p0, *p1;
+ map_domain_t *d0, *d1;
+ u8 error0 = MAP_ERROR_NONE, error1 = MAP_ERROR_NONE;
+ ip4_header_t *ip40, *ip41;
+ u16 port0 = 0, port1 = 0;
+ ip6_header_t *ip6h0, *ip6h1;
+ u32 map_domain_index0 = ~0, map_domain_index1 = ~0;
+ u32 next0 = IP4_MAP_NEXT_IP6_LOOKUP, next1 =
+ IP4_MAP_NEXT_IP6_LOOKUP;
+
+ /* 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, STORE);
+ vlib_prefetch_buffer_header (p3, STORE);
+ /* IPv4 + 8 = 28. possibly plus -40 */
+ CLIB_PREFETCH (p2->data - 40, 68, STORE);
+ CLIB_PREFETCH (p3->data - 40, 68, STORE);
+ }
+
+ pi0 = to_next[0] = from[0];
+ pi1 = to_next[1] = from[1];
+ from += 2;
+ n_left_from -= 2;
+ to_next += 2;
+ n_left_to_next -= 2;
+
+ p0 = vlib_get_buffer (vm, pi0);
+ p1 = vlib_get_buffer (vm, pi1);
+ ip40 = vlib_buffer_get_current (p0);
+ ip41 = vlib_buffer_get_current (p1);
+ map_domain_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
+ d0 = ip4_map_get_domain (map_domain_index0);
+ map_domain_index1 = vnet_buffer (p1)->ip.adj_index[VLIB_TX];
+ d1 = ip4_map_get_domain (map_domain_index1);
+ ASSERT (d0);
+ ASSERT (d1);
+
+ /*
+ * Shared IPv4 address
+ */
+ port0 = ip4_map_port_and_security_check (d0, ip40, &next0, &error0);
+ port1 = ip4_map_port_and_security_check (d1, ip41, &next1, &error1);
+
+ /* Decrement IPv4 TTL */
+ ip4_map_decrement_ttl (ip40, &error0);
+ ip4_map_decrement_ttl (ip41, &error1);
+ bool df0 =
+ ip40->flags_and_fragment_offset &
+ clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT);
+ bool df1 =
+ ip41->flags_and_fragment_offset &
+ clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT);
+
+ /* MAP calc */
+ u32 da40 = clib_net_to_host_u32 (ip40->dst_address.as_u32);
+ u32 da41 = clib_net_to_host_u32 (ip41->dst_address.as_u32);
+ u16 dp40 = clib_net_to_host_u16 (port0);
+ u16 dp41 = clib_net_to_host_u16 (port1);
+ u64 dal60 = map_get_pfx (d0, da40, dp40);
+ u64 dal61 = map_get_pfx (d1, da41, dp41);
+ u64 dar60 = map_get_sfx (d0, da40, dp40);
+ u64 dar61 = map_get_sfx (d1, da41, dp41);
+ if (dal60 == 0 && dar60 == 0 && error0 == MAP_ERROR_NONE
+ && next0 != IP4_MAP_NEXT_REASS)
+ error0 = MAP_ERROR_NO_BINDING;
+ if (dal61 == 0 && dar61 == 0 && error1 == MAP_ERROR_NONE
+ && next1 != IP4_MAP_NEXT_REASS)
+ error1 = MAP_ERROR_NO_BINDING;
+
+ /* construct ipv6 header */
+ vlib_buffer_advance (p0, -sizeof (ip6_header_t));
+ vlib_buffer_advance (p1, -sizeof (ip6_header_t));
+ ip6h0 = vlib_buffer_get_current (p0);
+ ip6h1 = vlib_buffer_get_current (p1);
+ vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+ vnet_buffer (p1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+
+ ip6h0->ip_version_traffic_class_and_flow_label =
+ ip4_map_vtcfl (ip40, p0);
+ ip6h1->ip_version_traffic_class_and_flow_label =
+ ip4_map_vtcfl (ip41, p1);
+ ip6h0->payload_length = ip40->length;
+ ip6h1->payload_length = ip41->length;
+ ip6h0->protocol = IP_PROTOCOL_IP_IN_IP;
+ ip6h1->protocol = IP_PROTOCOL_IP_IN_IP;
+ ip6h0->hop_limit = 0x40;
+ ip6h1->hop_limit = 0x40;
+ ip6h0->src_address = d0->ip6_src;
+ ip6h1->src_address = d1->ip6_src;
+ ip6h0->dst_address.as_u64[0] = clib_host_to_net_u64 (dal60);
+ ip6h0->dst_address.as_u64[1] = clib_host_to_net_u64 (dar60);
+ ip6h1->dst_address.as_u64[0] = clib_host_to_net_u64 (dal61);
+ ip6h1->dst_address.as_u64[1] = clib_host_to_net_u64 (dar61);
+
+ /*
+ * Determine next node. Can be one of:
+ * ip6-lookup, ip6-rewrite, ip4-fragment, ip4-virtreass, error-drop
+ */
+ if (PREDICT_TRUE (error0 == MAP_ERROR_NONE))
+ {
+ if (PREDICT_FALSE
+ (d0->mtu
+ && (clib_net_to_host_u16 (ip6h0->payload_length) +
+ sizeof (*ip6h0) > d0->mtu)))
+ {
+ next0 = ip4_map_fragment (p0, d0->mtu, df0, &error0);
+ }
+ else
+ {
+ next0 =
+ ip4_map_ip6_lookup_bypass (p0,
+ ip40) ?
+ IP4_MAP_NEXT_IP6_REWRITE : next0;
+ vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_TX,
+ thread_index,
+ map_domain_index0, 1,
+ clib_net_to_host_u16
+ (ip6h0->payload_length) +
+ 40);
+ }
+ }
+ else
+ {
+ next0 = IP4_MAP_NEXT_DROP;
+ }
+
+ /*
+ * Determine next node. Can be one of:
+ * ip6-lookup, ip6-rewrite, ip4-fragment, ip4-virtreass, error-drop
+ */
+ if (PREDICT_TRUE (error1 == MAP_ERROR_NONE))
+ {
+ if (PREDICT_FALSE
+ (d1->mtu
+ && (clib_net_to_host_u16 (ip6h1->payload_length) +
+ sizeof (*ip6h1) > d1->mtu)))
+ {
+ next1 = ip4_map_fragment (p1, d1->mtu, df1, &error1);
+ }
+ else
+ {
+ next1 =
+ ip4_map_ip6_lookup_bypass (p1,
+ ip41) ?
+ IP4_MAP_NEXT_IP6_REWRITE : next1;
+ vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_TX,
+ thread_index,
+ map_domain_index1, 1,
+ clib_net_to_host_u16
+ (ip6h1->payload_length) +
+ 40);
+ }
+ }
+ else
+ {
+ next1 = IP4_MAP_NEXT_DROP;
+ }
+
+ if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ map_trace_t *tr = vlib_add_trace (vm, node, p0, sizeof (*tr));
+ tr->map_domain_index = map_domain_index0;
+ tr->port = port0;
+ }
+ if (PREDICT_FALSE (p1->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ map_trace_t *tr = vlib_add_trace (vm, node, p1, sizeof (*tr));
+ tr->map_domain_index = map_domain_index1;
+ tr->port = port1;
+ }
+
+ p0->error = error_node->errors[error0];
+ p1->error = error_node->errors[error1];
+
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
+ n_left_to_next, pi0, pi1, next0,
+ next1);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 pi0;
+ vlib_buffer_t *p0;
+ map_domain_t *d0;
+ u8 error0 = MAP_ERROR_NONE;
+ ip4_header_t *ip40;
+ u16 port0 = 0;
+ ip6_header_t *ip6h0;
+ u32 next0 = IP4_MAP_NEXT_IP6_LOOKUP;
+ u32 map_domain_index0 = ~0;
+
+ pi0 = to_next[0] = from[0];
+ from += 1;
+ n_left_from -= 1;
+ to_next += 1;
+ n_left_to_next -= 1;
+
+ p0 = vlib_get_buffer (vm, pi0);
+ ip40 = vlib_buffer_get_current (p0);
+ map_domain_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
+ d0 = ip4_map_get_domain (map_domain_index0);
+ ASSERT (d0);
+
+ /*
+ * Shared IPv4 address
+ */
+ port0 = ip4_map_port_and_security_check (d0, ip40, &next0, &error0);
+
+ /* Decrement IPv4 TTL */
+ ip4_map_decrement_ttl (ip40, &error0);
+ bool df0 =
+ ip40->flags_and_fragment_offset &
+ clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT);
+
+ /* MAP calc */
+ u32 da40 = clib_net_to_host_u32 (ip40->dst_address.as_u32);
+ u16 dp40 = clib_net_to_host_u16 (port0);
+ u64 dal60 = map_get_pfx (d0, da40, dp40);
+ u64 dar60 = map_get_sfx (d0, da40, dp40);
+ if (dal60 == 0 && dar60 == 0 && error0 == MAP_ERROR_NONE
+ && next0 != IP4_MAP_NEXT_REASS)
+ error0 = MAP_ERROR_NO_BINDING;
+
+ /* construct ipv6 header */
+ vlib_buffer_advance (p0, -(sizeof (ip6_header_t)));
+ ip6h0 = vlib_buffer_get_current (p0);
+ vnet_buffer (p0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
+
+ ip6h0->ip_version_traffic_class_and_flow_label =
+ ip4_map_vtcfl (ip40, p0);
+ ip6h0->payload_length = ip40->length;
+ ip6h0->protocol = IP_PROTOCOL_IP_IN_IP;
+ ip6h0->hop_limit = 0x40;
+ ip6h0->src_address = d0->ip6_src;
+ ip6h0->dst_address.as_u64[0] = clib_host_to_net_u64 (dal60);
+ ip6h0->dst_address.as_u64[1] = clib_host_to_net_u64 (dar60);
+
+ /*
+ * Determine next node. Can be one of:
+ * ip6-lookup, ip6-rewrite, ip4-fragment, ip4-virtreass, error-drop
+ */
+ if (PREDICT_TRUE (error0 == MAP_ERROR_NONE))
+ {
+ if (PREDICT_FALSE
+ (d0->mtu
+ && (clib_net_to_host_u16 (ip6h0->payload_length) +
+ sizeof (*ip6h0) > d0->mtu)))
+ {
+ next0 = ip4_map_fragment (p0, d0->mtu, df0, &error0);
+ }
+ else
+ {
+ next0 =
+ ip4_map_ip6_lookup_bypass (p0,
+ ip40) ?
+ IP4_MAP_NEXT_IP6_REWRITE : next0;
+ vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_TX,
+ thread_index,
+ map_domain_index0, 1,
+ clib_net_to_host_u16
+ (ip6h0->payload_length) +
+ 40);
+ }
+ }
+ else
+ {
+ next0 = IP4_MAP_NEXT_DROP;
+ }
+
+ if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ map_trace_t *tr = vlib_add_trace (vm, node, p0, sizeof (*tr));
+ tr->map_domain_index = map_domain_index0;
+ tr->port = port0;
+ }
+
+ p0->error = error_node->errors[error0];
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, pi0, next0);
+ }
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ return frame->n_vectors;
+}
+
+/*
+ * ip4_map_reass
+ */
+static uword
+ip4_map_reass (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
+ vlib_node_runtime_t *error_node =
+ vlib_node_get_runtime (vm, ip4_map_reass_node.index);
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+ map_main_t *mm = &map_main;
+ vlib_combined_counter_main_t *cm = mm->domain_counters;
+ u32 thread_index = vlib_get_thread_index ();
+ u32 *fragments_to_drop = NULL;
+ u32 *fragments_to_loopback = NULL;
+
+ while (n_left_from > 0)
+ {
+ 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 pi0;
+ vlib_buffer_t *p0;
+ map_domain_t *d0;
+ u8 error0 = MAP_ERROR_NONE;
+ ip4_header_t *ip40;
+ i32 port0 = 0;
+ ip6_header_t *ip60;
+ u32 next0 = IP4_MAP_REASS_NEXT_IP6_LOOKUP;
+ u32 map_domain_index0;
+ u8 cached = 0;
+
+ pi0 = to_next[0] = from[0];
+ from += 1;
+ n_left_from -= 1;
+ to_next += 1;
+ n_left_to_next -= 1;
+
+ p0 = vlib_get_buffer (vm, pi0);
+ ip60 = vlib_buffer_get_current (p0);
+ ip40 = (ip4_header_t *) (ip60 + 1);
+ map_domain_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
+ d0 = ip4_map_get_domain (map_domain_index0);
+
+ map_ip4_reass_lock ();
+ map_ip4_reass_t *r = map_ip4_reass_get (ip40->src_address.as_u32,
+ ip40->dst_address.as_u32,
+ ip40->fragment_id,
+ ip40->protocol,
+ &fragments_to_drop);
+ if (PREDICT_FALSE (!r))
+ {
+ // Could not create a caching entry
+ error0 = MAP_ERROR_FRAGMENT_MEMORY;
+ }
+ else if (PREDICT_TRUE (ip4_get_fragment_offset (ip40)))
+ {
+ if (r->port >= 0)
+ {
+ // We know the port already
+ port0 = r->port;
+ }
+ else if (map_ip4_reass_add_fragment (r, pi0))
+ {
+ // Not enough space for caching
+ error0 = MAP_ERROR_FRAGMENT_MEMORY;
+ map_ip4_reass_free (r, &fragments_to_drop);
+ }
+ else
+ {
+ cached = 1;
+ }
+ }
+ else if ((port0 = ip4_get_port (ip40, 0)) == 0)
+ {
+ // Could not find port. We'll free the reassembly.
+ error0 = MAP_ERROR_BAD_PROTOCOL;
+ port0 = 0;
+ map_ip4_reass_free (r, &fragments_to_drop);
+ }
+ else
+ {
+ r->port = port0;
+ map_ip4_reass_get_fragments (r, &fragments_to_loopback);
+ }
+
+#ifdef MAP_IP4_REASS_COUNT_BYTES
+ if (!cached && r)
+ {
+ r->forwarded += clib_host_to_net_u16 (ip40->length) - 20;
+ if (!ip4_get_fragment_more (ip40))
+ r->expected_total =
+ ip4_get_fragment_offset (ip40) * 8 +
+ clib_host_to_net_u16 (ip40->length) - 20;
+ if (r->forwarded >= r->expected_total)
+ map_ip4_reass_free (r, &fragments_to_drop);
+ }
+#endif
+
+ map_ip4_reass_unlock ();
+
+ // NOTE: Most operations have already been performed by ip4_map
+ // All we need is the right destination address
+ ip60->dst_address.as_u64[0] =
+ map_get_pfx_net (d0, ip40->dst_address.as_u32, port0);
+ ip60->dst_address.as_u64[1] =
+ map_get_sfx_net (d0, ip40->dst_address.as_u32, port0);
+
+ if (PREDICT_FALSE
+ (d0->mtu
+ && (clib_net_to_host_u16 (ip60->payload_length) +
+ sizeof (*ip60) > d0->mtu)))
+ {
+ vnet_buffer (p0)->ip_frag.header_offset = sizeof (*ip60);
+ vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP6_LOOKUP;
+ vnet_buffer (p0)->ip_frag.mtu = d0->mtu;
+ vnet_buffer (p0)->ip_frag.flags = IP_FRAG_FLAG_IP6_HEADER;
+ next0 = IP4_MAP_REASS_NEXT_IP4_FRAGMENT;
+ }
+
+ if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ map_ip4_map_reass_trace_t *tr =
+ vlib_add_trace (vm, node, p0, sizeof (*tr));
+ tr->map_domain_index = map_domain_index0;
+ tr->port = port0;
+ tr->cached = cached;
+ }
+
+ if (cached)
+ {
+ //Dequeue the packet
+ n_left_to_next++;
+ to_next--;
+ }
+ else
+ {
+ if (error0 == MAP_ERROR_NONE)
+ vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_TX,
+ thread_index,
+ map_domain_index0, 1,
+ clib_net_to_host_u16
+ (ip60->payload_length) + 40);
+ next0 =
+ (error0 == MAP_ERROR_NONE) ? next0 : IP4_MAP_REASS_NEXT_DROP;
+ p0->error = error_node->errors[error0];
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, pi0, next0);
+ }
+
+ //Loopback when we reach the end of the inpu vector
+ 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 (from, fragments_to_loopback,
+ sizeof (u32) * len);
+ n_left_from = len;
+ vec_reset_length (fragments_to_loopback);
+ }
+ else
+ {
+ clib_memcpy (from,
+ fragments_to_loopback + (len -
+ VLIB_FRAME_SIZE),
+ sizeof (u32) * VLIB_FRAME_SIZE);
+ n_left_from = VLIB_FRAME_SIZE;
+ _vec_len (fragments_to_loopback) = len - VLIB_FRAME_SIZE;
+ }
+ }
+ }
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ map_send_all_to_node (vm, fragments_to_drop, node,
+ &error_node->errors[MAP_ERROR_FRAGMENT_DROPPED],
+ IP4_MAP_REASS_NEXT_DROP);
+
+ vec_free (fragments_to_drop);
+ vec_free (fragments_to_loopback);
+ return frame->n_vectors;
+}
+
+static char *map_error_strings[] = {
+#define _(sym,string) string,
+ foreach_map_error
+#undef _
+};
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE(ip4_map_node) = {
+ .function = ip4_map,
+ .name = "ip4-map",
+ .vector_size = sizeof(u32),
+ .format_trace = format_map_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = MAP_N_ERROR,
+ .error_strings = map_error_strings,
+
+ .n_next_nodes = IP4_MAP_N_NEXT,
+ .next_nodes = {
+ [IP4_MAP_NEXT_IP6_LOOKUP] = "ip6-lookup",
+#ifdef MAP_SKIP_IP6_LOOKUP
+ [IP4_MAP_NEXT_IP6_REWRITE] = "ip6-load-balance",
+#endif
+ [IP4_MAP_NEXT_IP4_FRAGMENT] = "ip4-frag",
+ [IP4_MAP_NEXT_IP6_FRAGMENT] = "ip6-frag",
+ [IP4_MAP_NEXT_REASS] = "ip4-map-reass",
+ [IP4_MAP_NEXT_ICMP_ERROR] = "ip4-icmp-error",
+ [IP4_MAP_NEXT_DROP] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE(ip4_map_reass_node) = {
+ .function = ip4_map_reass,
+ .name = "ip4-map-reass",
+ .vector_size = sizeof(u32),
+ .format_trace = format_ip4_map_reass_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = MAP_N_ERROR,
+ .error_strings = map_error_strings,
+
+ .n_next_nodes = IP4_MAP_REASS_N_NEXT,
+ .next_nodes = {
+ [IP4_MAP_REASS_NEXT_IP6_LOOKUP] = "ip6-lookup",
+ [IP4_MAP_REASS_NEXT_IP4_FRAGMENT] = "ip4-frag",
+ [IP4_MAP_REASS_NEXT_DROP] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff