+/*
+ * Copyright (c) 2017 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.
+ */
+
+/**
+ * @file
+ * @brief IPv6 Shallow Virtual Reassembly.
+ *
+ * This file contains the source code for IPv6 Shallow Virtual reassembly.
+ */
+
+#include <vppinfra/vec.h>
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ip/ip6_to_ip4.h>
+#include <vppinfra/bihash_48_8.h>
+#include <vnet/ip/reass/ip6_sv_reass.h>
+
+#define MSEC_PER_SEC 1000
+#define IP6_SV_REASS_TIMEOUT_DEFAULT_MS 100
+#define IP6_SV_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS 10000 // 10 seconds default
+#define IP6_SV_REASS_MAX_REASSEMBLIES_DEFAULT 1024
+#define IP6_SV_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT 3
+#define IP6_SV_REASS_HT_LOAD_FACTOR (0.75)
+
+typedef enum
+{
+ IP6_SV_REASS_RC_OK,
+ IP6_SV_REASS_RC_TOO_MANY_FRAGMENTS,
+ IP6_SV_REASS_RC_INTERNAL_ERROR,
+ IP6_SV_REASS_RC_UNSUPP_IP_PROTO,
+} ip6_sv_reass_rc_t;
+
+typedef struct
+{
+ union
+ {
+ struct
+ {
+ ip6_address_t src;
+ ip6_address_t dst;
+ u32 xx_id;
+ u32 frag_id;
+ u8 unused[7];
+ u8 proto;
+ };
+ u64 as_u64[6];
+ };
+} ip6_sv_reass_key_t;
+
+typedef union
+{
+ struct
+ {
+ u32 reass_index;
+ u32 thread_index;
+ };
+ u64 as_u64;
+} ip6_sv_reass_val_t;
+
+typedef union
+{
+ struct
+ {
+ ip6_sv_reass_key_t k;
+ ip6_sv_reass_val_t v;
+ };
+ clib_bihash_kv_48_8_t kv;
+} ip6_sv_reass_kv_t;
+
+typedef struct
+{
+ // hash table key
+ ip6_sv_reass_key_t key;
+ // time when last packet was received
+ f64 last_heard;
+ // internal id of this reassembly
+ u64 id;
+ // trace operation counter
+ u32 trace_op_counter;
+ // buffer indexes of buffers in this reassembly in chronological order -
+ // including overlaps and duplicate fragments
+ u32 *cached_buffers;
+ // set to true when this reassembly is completed
+ bool is_complete;
+ // ip protocol
+ u8 ip_proto;
+ // l4 src port
+ u16 l4_src_port;
+ // l4 dst port
+ u16 l4_dst_port;
+ // lru indexes
+ u32 lru_prev;
+ u32 lru_next;
+} ip6_sv_reass_t;
+
+typedef struct
+{
+ ip6_sv_reass_t *pool;
+ u32 reass_n;
+ u32 id_counter;
+ clib_spinlock_t lock;
+ // lru indexes
+ u32 lru_first;
+ u32 lru_last;
+} ip6_sv_reass_per_thread_t;
+
+typedef struct
+{
+ // IPv6 config
+ u32 timeout_ms;
+ f64 timeout;
+ u32 expire_walk_interval_ms;
+ // maximum number of fragments in one reassembly
+ u32 max_reass_len;
+ // maximum number of reassemblies
+ u32 max_reass_n;
+
+ // IPv6 runtime
+ clib_bihash_48_8_t hash;
+
+ // per-thread data
+ ip6_sv_reass_per_thread_t *per_thread_data;
+
+ // convenience
+ vlib_main_t *vlib_main;
+ vnet_main_t *vnet_main;
+
+ // node index of ip6-drop node
+ u32 ip6_drop_idx;
+ u32 ip6_icmp_error_idx;
+ u32 ip6_sv_reass_expire_node_idx;
+
+ /** Worker handoff */
+ u32 fq_index;
+ u32 fq_feature_index;
+
+ // reference count for enabling/disabling feature
+ u32 feature_use_refcount;
+} ip6_sv_reass_main_t;
+
+extern ip6_sv_reass_main_t ip6_sv_reass_main;
+
+#ifndef CLIB_MARCH_VARIANT
+ip6_sv_reass_main_t ip6_sv_reass_main;
+#endif /* CLIB_MARCH_VARIANT */
+
+typedef enum
+{
+ IP6_SV_REASSEMBLY_NEXT_INPUT,
+ IP6_SV_REASSEMBLY_NEXT_DROP,
+ IP6_SV_REASSEMBLY_NEXT_ICMP_ERROR,
+ IP6_SV_REASSEMBLY_NEXT_HANDOFF,
+ IP6_SV_REASSEMBLY_N_NEXT,
+} ip6_sv_reass_next_t;
+
+typedef enum
+{
+ ICMP_ERROR_FL_TOO_BIG,
+ ICMP_ERROR_FL_NOT_MULT_8,
+ REASS_FRAGMENT_CACHE,
+ REASS_FINISH,
+ REASS_FRAGMENT_FORWARD,
+} ip6_sv_reass_trace_operation_e;
+
+typedef struct
+{
+ ip6_sv_reass_trace_operation_e action;
+ u32 reass_id;
+ u32 op_id;
+ u8 ip_proto;
+ u16 l4_src_port;
+ u16 l4_dst_port;
+} ip6_sv_reass_trace_t;
+
+static u8 *
+format_ip6_sv_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 *);
+ ip6_sv_reass_trace_t *t = va_arg (*args, ip6_sv_reass_trace_t *);
+ s = format (s, "reass id: %u, op id: %u ", t->reass_id, t->op_id);
+ switch (t->action)
+ {
+ case ICMP_ERROR_FL_TOO_BIG:
+ s = format (s, "\n%Uicmp-error - frag_len > 65535 %U");
+ break;
+ case ICMP_ERROR_FL_NOT_MULT_8:
+ s = format (s, "\n%Uicmp-error - frag_len mod 8 != 0 %U");
+ break;
+ case REASS_FRAGMENT_CACHE:
+ s = format (s, "[cached]");
+ break;
+ case REASS_FINISH:
+ s =
+ format (s, "[finish, ip proto=%u, src_port=%u, dst_port=%u]",
+ t->ip_proto, clib_net_to_host_u16 (t->l4_src_port),
+ clib_net_to_host_u16 (t->l4_dst_port));
+ break;
+ case REASS_FRAGMENT_FORWARD:
+ s =
+ format (s, "[forward, ip proto=%u, src_port=%u, dst_port=%u]",
+ t->ip_proto, clib_net_to_host_u16 (t->l4_src_port),
+ clib_net_to_host_u16 (t->l4_dst_port));
+ break;
+ }
+ return s;
+}
+
+static void
+ip6_sv_reass_add_trace (vlib_main_t * vm, vlib_node_runtime_t * node,
+ ip6_sv_reass_main_t * rm,
+ ip6_sv_reass_t * reass, u32 bi,
+ ip6_sv_reass_trace_operation_e action,
+ u32 ip_proto, u16 l4_src_port, u16 l4_dst_port)
+{
+ vlib_buffer_t *b = vlib_get_buffer (vm, bi);
+ ip6_sv_reass_trace_t *t = vlib_add_trace (vm, node, b, sizeof (t[0]));
+ t->reass_id = reass->id;
+ t->action = action;
+ t->op_id = reass->trace_op_counter;
+ t->ip_proto = ip_proto;
+ t->l4_src_port = l4_src_port;
+ t->l4_dst_port = l4_dst_port;
+ ++reass->trace_op_counter;
+#if 0
+ static u8 *s = NULL;
+ s = format (s, "%U", format_ip6_sv_reass_trace, NULL, NULL, t);
+ printf ("%.*s\n", vec_len (s), s);
+ fflush (stdout);
+ vec_reset_length (s);
+#endif
+}
+
+always_inline void
+ip6_sv_reass_free (vlib_main_t * vm, ip6_sv_reass_main_t * rm,
+ ip6_sv_reass_per_thread_t * rt, ip6_sv_reass_t * reass)
+{
+ clib_bihash_kv_48_8_t kv;
+ kv.key[0] = reass->key.as_u64[0];
+ kv.key[1] = reass->key.as_u64[1];
+ kv.key[2] = reass->key.as_u64[2];
+ kv.key[3] = reass->key.as_u64[3];
+ kv.key[4] = reass->key.as_u64[4];
+ kv.key[5] = reass->key.as_u64[5];
+ clib_bihash_add_del_48_8 (&rm->hash, &kv, 0);
+ vlib_buffer_free (vm, reass->cached_buffers,
+ vec_len (reass->cached_buffers));
+ vec_free (reass->cached_buffers);
+ reass->cached_buffers = NULL;
+ if (~0 != reass->lru_prev)
+ {
+ ip6_sv_reass_t *lru_prev =
+ pool_elt_at_index (rt->pool, reass->lru_prev);
+ lru_prev->lru_next = reass->lru_next;
+ }
+ if (~0 != reass->lru_next)
+ {
+ ip6_sv_reass_t *lru_next =
+ pool_elt_at_index (rt->pool, reass->lru_next);
+ lru_next->lru_prev = reass->lru_prev;
+ }
+ if (rt->lru_first == reass - rt->pool)
+ {
+ rt->lru_first = reass->lru_next;
+ }
+ if (rt->lru_last == reass - rt->pool)
+ {
+ rt->lru_last = reass->lru_prev;
+ }
+ pool_put (rt->pool, reass);
+ --rt->reass_n;
+}
+
+always_inline void
+ip6_sv_reass_init (ip6_sv_reass_t * reass)
+{
+ reass->cached_buffers = NULL;
+ reass->is_complete = false;
+}
+
+always_inline ip6_sv_reass_t *
+ip6_sv_reass_find_or_create (vlib_main_t * vm, vlib_node_runtime_t * node,
+ ip6_sv_reass_main_t * rm,
+ ip6_sv_reass_per_thread_t * rt,
+ ip6_sv_reass_kv_t * kv, u32 * icmp_bi,
+ u8 * do_handoff)
+{
+ ip6_sv_reass_t *reass = NULL;
+ f64 now = vlib_time_now (rm->vlib_main);
+
+ if (!clib_bihash_search_48_8
+ (&rm->hash, (clib_bihash_kv_48_8_t *) kv, (clib_bihash_kv_48_8_t *) kv))
+ {
+ if (vm->thread_index != kv->v.thread_index)
+ {
+ *do_handoff = 1;
+ return NULL;
+ }
+ reass = pool_elt_at_index (rt->pool, kv->v.reass_index);
+
+ if (now > reass->last_heard + rm->timeout)
+ {
+ ip6_sv_reass_free (vm, rm, rt, reass);
+ reass = NULL;
+ }
+ }
+
+ if (reass)
+ {
+ reass->last_heard = now;
+ return reass;
+ }
+
+ if (rt->reass_n >= rm->max_reass_n)
+ {
+ reass = pool_elt_at_index (rt->pool, rt->lru_last);
+ ip6_sv_reass_free (vm, rm, rt, reass);
+ }
+
+ pool_get (rt->pool, reass);
+ clib_memset (reass, 0, sizeof (*reass));
+ reass->id = ((u64) vm->thread_index * 1000000000) + rt->id_counter;
+ ++rt->id_counter;
+ ip6_sv_reass_init (reass);
+ ++rt->reass_n;
+
+ reass->lru_prev = reass->lru_next = ~0;
+
+ if (~0 != rt->lru_last)
+ {
+ ip6_sv_reass_t *lru_last = pool_elt_at_index (rt->pool, rt->lru_last);
+ reass->lru_prev = rt->lru_last;
+ lru_last->lru_next = rt->lru_last = reass - rt->pool;
+ }
+
+ if (~0 == rt->lru_first)
+ {
+ rt->lru_first = rt->lru_last = reass - rt->pool;
+ }
+
+ reass->key.as_u64[0] = ((clib_bihash_kv_48_8_t *) kv)->key[0];
+ reass->key.as_u64[1] = ((clib_bihash_kv_48_8_t *) kv)->key[1];
+ reass->key.as_u64[2] = ((clib_bihash_kv_48_8_t *) kv)->key[2];
+ reass->key.as_u64[3] = ((clib_bihash_kv_48_8_t *) kv)->key[3];
+ reass->key.as_u64[4] = ((clib_bihash_kv_48_8_t *) kv)->key[4];
+ reass->key.as_u64[5] = ((clib_bihash_kv_48_8_t *) kv)->key[5];
+ kv->v.reass_index = (reass - rt->pool);
+ kv->v.thread_index = vm->thread_index;
+ reass->last_heard = now;
+
+ if (clib_bihash_add_del_48_8 (&rm->hash, (clib_bihash_kv_48_8_t *) kv, 1))
+ {
+ ip6_sv_reass_free (vm, rm, rt, reass);
+ reass = NULL;
+ }
+
+ return reass;
+}
+
+always_inline ip6_sv_reass_rc_t
+ip6_sv_reass_update (vlib_main_t * vm, vlib_node_runtime_t * node,
+ ip6_sv_reass_main_t * rm, ip6_sv_reass_per_thread_t * rt,
+ ip6_sv_reass_t * reass, u32 bi0,
+ ip6_frag_hdr_t * frag_hdr)
+{
+ vlib_buffer_t *fb = vlib_get_buffer (vm, bi0);
+ vnet_buffer_opaque_t *fvnb = vnet_buffer (fb);
+ fvnb->ip.reass.ip6_frag_hdr_offset =
+ (u8 *) frag_hdr - (u8 *) vlib_buffer_get_current (fb);
+ ip6_header_t *fip = vlib_buffer_get_current (fb);
+ if (fb->current_length < sizeof (*fip) ||
+ fvnb->ip.reass.ip6_frag_hdr_offset == 0 ||
+ fvnb->ip.reass.ip6_frag_hdr_offset >= fb->current_length)
+ {
+ return IP6_SV_REASS_RC_INTERNAL_ERROR;
+ }
+
+ u32 fragment_first = fvnb->ip.reass.fragment_first =
+ ip6_frag_hdr_offset_bytes (frag_hdr);
+ u32 fragment_length =
+ vlib_buffer_length_in_chain (vm, fb) -
+ (fvnb->ip.reass.ip6_frag_hdr_offset + sizeof (*frag_hdr));
+ u32 fragment_last = fvnb->ip.reass.fragment_last =
+ fragment_first + fragment_length - 1;
+ fvnb->ip.reass.range_first = fragment_first;
+ fvnb->ip.reass.range_last = fragment_last;
+ fvnb->ip.reass.next_range_bi = ~0;
+ if (0 == fragment_first)
+ {
+ ip6_ext_header_t *ext_hdr = (void *) frag_hdr;
+ while (ip6_ext_hdr (ext_hdr->next_hdr)
+ && vlib_object_within_buffer_data (vm, fb, ext_hdr,
+ ext_hdr->n_data_u64s * 8))
+ {
+ ext_hdr = ip6_ext_next_header (ext_hdr);
+ }
+ reass->ip_proto = ext_hdr->next_hdr;
+ reass->l4_src_port = ip6_get_port (fip, 1, fb->current_length);
+ reass->l4_dst_port = ip6_get_port (fip, 0, fb->current_length);
+ if (!reass->l4_src_port || !reass->l4_dst_port)
+ return IP6_SV_REASS_RC_UNSUPP_IP_PROTO;
+ reass->is_complete = true;
+ vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ip6_sv_reass_add_trace (vm, node, rm, reass, bi0, REASS_FINISH,
+ reass->ip_proto, reass->l4_src_port,
+ reass->l4_dst_port);
+ }
+ }
+ vec_add1 (reass->cached_buffers, bi0);
+ if (!reass->is_complete)
+ {
+ if (PREDICT_FALSE (fb->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ip6_sv_reass_add_trace (vm, node, rm, reass, bi0,
+ REASS_FRAGMENT_CACHE, reass->ip_proto,
+ reass->l4_src_port, reass->l4_dst_port);
+ }
+ if (vec_len (reass->cached_buffers) > rm->max_reass_len)
+ {
+ return IP6_SV_REASS_RC_TOO_MANY_FRAGMENTS;
+ }
+ }
+ return IP6_SV_REASS_RC_OK;
+}
+
+always_inline bool
+ip6_sv_reass_verify_upper_layer_present (vlib_node_runtime_t * node,
+ vlib_buffer_t * b,
+ ip6_frag_hdr_t * frag_hdr)
+{
+ ip6_ext_header_t *tmp = (ip6_ext_header_t *) frag_hdr;
+ while (ip6_ext_hdr (tmp->next_hdr))
+ {
+ tmp = ip6_ext_next_header (tmp);
+ }
+ if (IP_PROTOCOL_IP6_NONXT == tmp->next_hdr)
+ {
+ icmp6_error_set_vnet_buffer (b, ICMP6_parameter_problem,
+ ICMP6_parameter_problem_first_fragment_has_incomplete_header_chain,
+ 0);
+ b->error = node->errors[IP6_ERROR_REASS_MISSING_UPPER];
+
+ return false;
+ }
+ return true;
+}
+
+always_inline bool
+ip6_sv_reass_verify_fragment_multiple_8 (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_buffer_t * b,
+ ip6_frag_hdr_t * frag_hdr)
+{
+ vnet_buffer_opaque_t *vnb = vnet_buffer (b);
+ ip6_header_t *ip = vlib_buffer_get_current (b);
+ int more_fragments = ip6_frag_hdr_more (frag_hdr);
+ u32 fragment_length =
+ vlib_buffer_length_in_chain (vm, b) -
+ (vnb->ip.reass.ip6_frag_hdr_offset + sizeof (*frag_hdr));
+ if (more_fragments && 0 != fragment_length % 8)
+ {
+ icmp6_error_set_vnet_buffer (b, ICMP6_parameter_problem,
+ ICMP6_parameter_problem_erroneous_header_field,
+ (u8 *) & ip->payload_length - (u8 *) ip);
+ return false;
+ }
+ return true;
+}
+
+always_inline bool
+ip6_sv_reass_verify_packet_size_lt_64k (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_buffer_t * b,
+ ip6_frag_hdr_t * frag_hdr)
+{
+ vnet_buffer_opaque_t *vnb = vnet_buffer (b);
+ u32 fragment_first = ip6_frag_hdr_offset_bytes (frag_hdr);
+ u32 fragment_length =
+ vlib_buffer_length_in_chain (vm, b) -
+ (vnb->ip.reass.ip6_frag_hdr_offset + sizeof (*frag_hdr));
+ if (fragment_first + fragment_length > 65535)
+ {
+ ip6_header_t *ip0 = vlib_buffer_get_current (b);
+ icmp6_error_set_vnet_buffer (b, ICMP6_parameter_problem,
+ ICMP6_parameter_problem_erroneous_header_field,
+ (u8 *) & frag_hdr->fragment_offset_and_more
+ - (u8 *) ip0);
+ return false;
+ }
+ return true;
+}
+
+always_inline uword
+ip6_sv_reassembly_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, bool is_feature)
+{
+ u32 *from = vlib_frame_vector_args (frame);
+ u32 n_left_from, n_left_to_next, *to_next, next_index;
+ ip6_sv_reass_main_t *rm = &ip6_sv_reass_main;
+ ip6_sv_reass_per_thread_t *rt = &rm->per_thread_data[vm->thread_index];
+ clib_spinlock_lock (&rt->lock);
+
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ 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 bi0;
+ vlib_buffer_t *b0;
+ u32 next0 = IP6_SV_REASSEMBLY_NEXT_DROP;
+ u32 error0 = IP6_ERROR_NONE;
+ u32 icmp_bi = ~0;
+
+ bi0 = from[0];
+ b0 = vlib_get_buffer (vm, bi0);
+
+ ip6_header_t *ip0 = vlib_buffer_get_current (b0);
+ ip6_frag_hdr_t *frag_hdr = NULL;
+ ip6_ext_header_t *prev_hdr;
+ if (ip6_ext_hdr (ip0->protocol))
+ {
+ frag_hdr =
+ ip6_ext_header_find (vm, b0, ip0,
+ IP_PROTOCOL_IPV6_FRAGMENTATION,
+ &prev_hdr);
+ }
+ if (!frag_hdr)
+ {
+ // this is a regular packet - no fragmentation
+ vnet_buffer (b0)->ip.reass.ip_proto = ip0->protocol;
+ vnet_buffer (b0)->ip.reass.l4_src_port =
+ ip6_get_port (ip0, 1, b0->current_length);
+ vnet_buffer (b0)->ip.reass.l4_dst_port =
+ ip6_get_port (ip0, 0, b0->current_length);
+ next0 = IP6_SV_REASSEMBLY_NEXT_INPUT;
+ goto packet_enqueue;
+ }
+ if (0 == ip6_frag_hdr_offset (frag_hdr))
+ {
+ // first fragment - verify upper-layer is present
+ if (!ip6_sv_reass_verify_upper_layer_present
+ (node, b0, frag_hdr))
+ {
+ next0 = IP6_SV_REASSEMBLY_NEXT_ICMP_ERROR;
+ goto packet_enqueue;
+ }
+ }
+ if (!ip6_sv_reass_verify_fragment_multiple_8
+ (vm, node, b0, frag_hdr)
+ || !ip6_sv_reass_verify_packet_size_lt_64k (vm, node, b0,
+ frag_hdr))
+ {
+ next0 = IP6_SV_REASSEMBLY_NEXT_ICMP_ERROR;
+ goto packet_enqueue;
+ }
+ vnet_buffer (b0)->ip.reass.ip6_frag_hdr_offset =
+ (u8 *) frag_hdr - (u8 *) ip0;
+
+ ip6_sv_reass_kv_t kv;
+ u8 do_handoff = 0;
+
+ kv.k.as_u64[0] = ip0->src_address.as_u64[0];
+ kv.k.as_u64[1] = ip0->src_address.as_u64[1];
+ kv.k.as_u64[2] = ip0->dst_address.as_u64[0];
+ kv.k.as_u64[3] = ip0->dst_address.as_u64[1];
+ kv.k.as_u64[4] =
+ ((u64) vec_elt (ip6_main.fib_index_by_sw_if_index,
+ vnet_buffer (b0)->sw_if_index[VLIB_RX])) << 32 |
+ (u64) frag_hdr->identification;
+ kv.k.as_u64[5] = ip0->protocol;
+
+ ip6_sv_reass_t *reass =
+ ip6_sv_reass_find_or_create (vm, node, rm, rt, &kv, &icmp_bi,
+ &do_handoff);
+
+ if (PREDICT_FALSE (do_handoff))
+ {
+ next0 = IP6_SV_REASSEMBLY_NEXT_HANDOFF;
+ vnet_buffer (b0)->ip.reass.owner_thread_index =
+ kv.v.thread_index;
+ }
+
+ if (!reass)
+ {
+ next0 = IP6_SV_REASSEMBLY_NEXT_DROP;
+ error0 = IP6_ERROR_REASS_LIMIT_REACHED;
+ goto packet_enqueue;
+ }
+
+ if (reass->is_complete)
+ {
+ vnet_buffer (b0)->ip.reass.ip_proto = reass->ip_proto;
+ vnet_buffer (b0)->ip.reass.l4_src_port = reass->l4_src_port;
+ vnet_buffer (b0)->ip.reass.l4_dst_port = reass->l4_dst_port;
+ next0 = IP6_SV_REASSEMBLY_NEXT_INPUT;
+ error0 = IP6_ERROR_NONE;
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ip6_sv_reass_add_trace (vm, node, rm, reass, bi0,
+ REASS_FRAGMENT_FORWARD,
+ reass->ip_proto,
+ reass->l4_src_port,
+ reass->l4_dst_port);
+ }
+ goto packet_enqueue;
+ }
+
+ switch (ip6_sv_reass_update
+ (vm, node, rm, rt, reass, bi0, frag_hdr))
+ {
+ case IP6_SV_REASS_RC_OK:
+ /* nothing to do here */
+ break;
+ case IP6_SV_REASS_RC_TOO_MANY_FRAGMENTS:
+ vlib_node_increment_counter (vm, node->node_index,
+ IP6_ERROR_REASS_FRAGMENT_CHAIN_TOO_LONG,
+ 1);
+ ip6_sv_reass_free (vm, rm, rt, reass);
+ goto next_packet;
+ break;
+ case IP6_SV_REASS_RC_UNSUPP_IP_PROTO:
+ vlib_node_increment_counter (vm, node->node_index,
+ IP6_ERROR_REASS_UNSUPP_IP_PROTO,
+ 1);
+ ip6_sv_reass_free (vm, rm, rt, reass);
+ goto next_packet;
+ break;
+ case IP6_SV_REASS_RC_INTERNAL_ERROR:
+ vlib_node_increment_counter (vm, node->node_index,
+ IP6_ERROR_REASS_INTERNAL_ERROR, 1);
+ ip6_sv_reass_free (vm, rm, rt, reass);
+ goto next_packet;
+ break;
+ }
+
+ b0->error = node->errors[error0];
+
+ if (reass->is_complete)
+ {
+ u32 idx;
+ vec_foreach_index (idx, reass->cached_buffers)
+ {
+ u32 bi0 = vec_elt (reass->cached_buffers, idx);
+ if (0 == n_left_to_next)
+ {
+ vlib_put_next_frame (vm, node, next_index,
+ n_left_to_next);
+ vlib_get_next_frame (vm, node, next_index, to_next,
+ n_left_to_next);
+ }
+ to_next[0] = bi0;
+ to_next += 1;
+ n_left_to_next -= 1;
+ b0 = vlib_get_buffer (vm, bi0);
+ if (is_feature)
+ {
+ vnet_feature_next (&next0, b0);
+ }
+ vnet_buffer (b0)->ip.reass.ip_proto = reass->ip_proto;
+ vnet_buffer (b0)->ip.reass.l4_src_port = reass->l4_src_port;
+ vnet_buffer (b0)->ip.reass.l4_dst_port = reass->l4_dst_port;
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ip6_sv_reass_add_trace (vm, node, rm, reass, bi0,
+ REASS_FRAGMENT_FORWARD,
+ reass->ip_proto,
+ reass->l4_src_port,
+ reass->l4_dst_port);
+ }
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next, bi0,
+ next0);
+ }
+ _vec_len (reass->cached_buffers) = 0; // buffers are owned by frame now
+ }
+ goto next_packet;
+
+ packet_enqueue:
+ to_next[0] = bi0;
+ to_next += 1;
+ n_left_to_next -= 1;
+ if (is_feature && IP6_ERROR_NONE == error0)
+ {
+ b0 = vlib_get_buffer (vm, bi0);
+ vnet_feature_next (&next0, b0);
+ }
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, next0);
+
+ if (~0 != icmp_bi)
+ {
+ next0 = IP6_SV_REASSEMBLY_NEXT_ICMP_ERROR;
+ to_next[0] = icmp_bi;
+ to_next += 1;
+ n_left_to_next -= 1;
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, icmp_bi,
+ next0);
+ }
+
+ next_packet:
+ from += 1;
+ n_left_from -= 1;
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ clib_spinlock_unlock (&rt->lock);
+ return frame->n_vectors;
+}
+
+static char *ip6_sv_reassembly_error_strings[] = {
+#define _(sym, string) string,
+ foreach_ip6_error
+#undef _
+};
+
+VLIB_NODE_FN (ip6_sv_reass_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return ip6_sv_reassembly_inline (vm, node, frame, false /* is_feature */ );
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip6_sv_reass_node) = {
+ .name = "ip6-sv-reassembly",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ip6_sv_reass_trace,
+ .n_errors = ARRAY_LEN (ip6_sv_reassembly_error_strings),
+ .error_strings = ip6_sv_reassembly_error_strings,
+ .n_next_nodes = IP6_SV_REASSEMBLY_N_NEXT,
+ .next_nodes =
+ {
+ [IP6_SV_REASSEMBLY_NEXT_INPUT] = "ip6-input",
+ [IP6_SV_REASSEMBLY_NEXT_DROP] = "ip6-drop",
+ [IP6_SV_REASSEMBLY_NEXT_ICMP_ERROR] = "ip6-icmp-error",
+ [IP6_SV_REASSEMBLY_NEXT_HANDOFF] = "ip6-sv-reassembly-handoff",
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FN (ip6_sv_reass_node_feature) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return ip6_sv_reassembly_inline (vm, node, frame, true /* is_feature */ );
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip6_sv_reass_node_feature) = {
+ .name = "ip6-sv-reassembly-feature",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ip6_sv_reass_trace,
+ .n_errors = ARRAY_LEN (ip6_sv_reassembly_error_strings),
+ .error_strings = ip6_sv_reassembly_error_strings,
+ .n_next_nodes = IP6_SV_REASSEMBLY_N_NEXT,
+ .next_nodes =
+ {
+ [IP6_SV_REASSEMBLY_NEXT_INPUT] = "ip6-input",
+ [IP6_SV_REASSEMBLY_NEXT_DROP] = "ip6-drop",
+ [IP6_SV_REASSEMBLY_NEXT_ICMP_ERROR] = "ip6-icmp-error",
+ [IP6_SV_REASSEMBLY_NEXT_HANDOFF] = "ip6-sv-reass-feature-hoff",
+ },
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VNET_FEATURE_INIT (ip6_sv_reassembly_feature) = {
+ .arc_name = "ip6-unicast",
+ .node_name = "ip6-sv-reassembly-feature",
+ .runs_before = VNET_FEATURES ("ip6-lookup"),
+ .runs_after = 0,
+};
+/* *INDENT-ON* */
+
+#ifndef CLIB_MARCH_VARIANT
+static u32
+ip6_sv_reass_get_nbuckets ()
+{
+ ip6_sv_reass_main_t *rm = &ip6_sv_reass_main;
+ u32 nbuckets;
+ u8 i;
+
+ nbuckets = (u32) (rm->max_reass_n / IP6_SV_REASS_HT_LOAD_FACTOR);
+
+ for (i = 0; i < 31; i++)
+ if ((1 << i) >= nbuckets)
+ break;
+ nbuckets = 1 << i;
+
+ return nbuckets;
+}
+#endif /* CLIB_MARCH_VARIANT */
+
+typedef enum
+{
+ IP6_EVENT_CONFIG_CHANGED = 1,
+} ip6_sv_reass_event_t;
+
+#ifndef CLIB_MARCH_VARIANT
+typedef struct
+{
+ int failure;
+ clib_bihash_48_8_t *new_hash;
+} ip6_rehash_cb_ctx;
+
+static void
+ip6_rehash_cb (clib_bihash_kv_48_8_t * kv, void *_ctx)
+{
+ ip6_rehash_cb_ctx *ctx = _ctx;
+ if (clib_bihash_add_del_48_8 (ctx->new_hash, kv, 1))
+ {
+ ctx->failure = 1;
+ }
+}
+
+static void
+ip6_sv_reass_set_params (u32 timeout_ms, u32 max_reassemblies,
+ u32 max_reassembly_length,
+ u32 expire_walk_interval_ms)
+{
+ ip6_sv_reass_main.timeout_ms = timeout_ms;
+ ip6_sv_reass_main.timeout = (f64) timeout_ms / (f64) MSEC_PER_SEC;
+ ip6_sv_reass_main.max_reass_n = max_reassemblies;
+ ip6_sv_reass_main.max_reass_len = max_reassembly_length;
+ ip6_sv_reass_main.expire_walk_interval_ms = expire_walk_interval_ms;
+}
+
+vnet_api_error_t
+ip6_sv_reass_set (u32 timeout_ms, u32 max_reassemblies,
+ u32 max_reassembly_length, u32 expire_walk_interval_ms)
+{
+ u32 old_nbuckets = ip6_sv_reass_get_nbuckets ();
+ ip6_sv_reass_set_params (timeout_ms, max_reassemblies,
+ max_reassembly_length, expire_walk_interval_ms);
+ vlib_process_signal_event (ip6_sv_reass_main.vlib_main,
+ ip6_sv_reass_main.ip6_sv_reass_expire_node_idx,
+ IP6_EVENT_CONFIG_CHANGED, 0);
+ u32 new_nbuckets = ip6_sv_reass_get_nbuckets ();
+ if (ip6_sv_reass_main.max_reass_n > 0 && new_nbuckets > old_nbuckets)
+ {
+ clib_bihash_48_8_t new_hash;
+ clib_memset (&new_hash, 0, sizeof (new_hash));
+ ip6_rehash_cb_ctx ctx;
+ ctx.failure = 0;
+ ctx.new_hash = &new_hash;
+ clib_bihash_init_48_8 (&new_hash, "ip6-sv-reass", new_nbuckets,
+ new_nbuckets * 1024);
+ clib_bihash_foreach_key_value_pair_48_8 (&ip6_sv_reass_main.hash,
+ ip6_rehash_cb, &ctx);
+ if (ctx.failure)
+ {
+ clib_bihash_free_48_8 (&new_hash);
+ return -1;
+ }
+ else
+ {
+ clib_bihash_free_48_8 (&ip6_sv_reass_main.hash);
+ clib_memcpy_fast (&ip6_sv_reass_main.hash, &new_hash,
+ sizeof (ip6_sv_reass_main.hash));
+ clib_bihash_copied (&ip6_sv_reass_main.hash, &new_hash);
+ }
+ }
+ return 0;
+}
+
+vnet_api_error_t
+ip6_sv_reass_get (u32 * timeout_ms, u32 * max_reassemblies,
+ u32 * max_reassembly_length, u32 * expire_walk_interval_ms)
+{
+ *timeout_ms = ip6_sv_reass_main.timeout_ms;
+ *max_reassemblies = ip6_sv_reass_main.max_reass_n;
+ *max_reassembly_length = ip6_sv_reass_main.max_reass_len;
+ *expire_walk_interval_ms = ip6_sv_reass_main.expire_walk_interval_ms;
+ return 0;
+}
+
+static clib_error_t *
+ip6_sv_reass_init_function (vlib_main_t * vm)
+{
+ ip6_sv_reass_main_t *rm = &ip6_sv_reass_main;
+ clib_error_t *error = 0;
+ u32 nbuckets;
+ vlib_node_t *node;
+
+ rm->vlib_main = vm;
+ rm->vnet_main = vnet_get_main ();
+
+ vec_validate (rm->per_thread_data, vlib_num_workers ());
+ ip6_sv_reass_per_thread_t *rt;
+ vec_foreach (rt, rm->per_thread_data)
+ {
+ clib_spinlock_init (&rt->lock);
+ pool_alloc (rt->pool, rm->max_reass_n);
+ rt->lru_first = rt->lru_last = ~0;
+ }
+
+ node = vlib_get_node_by_name (vm, (u8 *) "ip6-sv-reassembly-expire-walk");
+ ASSERT (node);
+ rm->ip6_sv_reass_expire_node_idx = node->index;
+
+ ip6_sv_reass_set_params (IP6_SV_REASS_TIMEOUT_DEFAULT_MS,
+ IP6_SV_REASS_MAX_REASSEMBLIES_DEFAULT,
+ IP6_SV_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT,
+ IP6_SV_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS);
+
+ nbuckets = ip6_sv_reass_get_nbuckets ();
+ clib_bihash_init_48_8 (&rm->hash, "ip6-sv-reass", nbuckets,
+ nbuckets * 1024);
+
+ node = vlib_get_node_by_name (vm, (u8 *) "ip6-drop");
+ ASSERT (node);
+ rm->ip6_drop_idx = node->index;
+ node = vlib_get_node_by_name (vm, (u8 *) "ip6-icmp-error");
+ ASSERT (node);
+ rm->ip6_icmp_error_idx = node->index;
+
+ if ((error = vlib_call_init_function (vm, ip_main_init)))
+ return error;
+ ip6_register_protocol (IP_PROTOCOL_IPV6_FRAGMENTATION,
+ ip6_sv_reass_node.index);
+
+ rm->fq_index = vlib_frame_queue_main_init (ip6_sv_reass_node.index, 0);
+ rm->fq_feature_index =
+ vlib_frame_queue_main_init (ip6_sv_reass_node_feature.index, 0);
+
+ return error;
+}
+
+VLIB_INIT_FUNCTION (ip6_sv_reass_init_function);
+#endif /* CLIB_MARCH_VARIANT */
+
+static uword
+ip6_sv_reass_walk_expired (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * f)
+{
+ ip6_sv_reass_main_t *rm = &ip6_sv_reass_main;
+ uword event_type, *event_data = 0;
+
+ while (true)
+ {
+ vlib_process_wait_for_event_or_clock (vm,
+ (f64) rm->expire_walk_interval_ms
+ / (f64) MSEC_PER_SEC);
+ event_type = vlib_process_get_events (vm, &event_data);
+
+ switch (event_type)
+ {
+ case ~0: /* no events => timeout */
+ /* nothing to do here */
+ break;
+ case IP6_EVENT_CONFIG_CHANGED:
+ break;
+ default:
+ clib_warning ("BUG: event type 0x%wx", event_type);
+ break;
+ }
+ f64 now = vlib_time_now (vm);
+
+ ip6_sv_reass_t *reass;
+ int *pool_indexes_to_free = NULL;
+
+ uword thread_index = 0;
+ int index;
+ const uword nthreads = vlib_num_workers () + 1;
+ u32 *vec_icmp_bi = NULL;
+ for (thread_index = 0; thread_index < nthreads; ++thread_index)
+ {
+ ip6_sv_reass_per_thread_t *rt = &rm->per_thread_data[thread_index];
+ clib_spinlock_lock (&rt->lock);
+
+ vec_reset_length (pool_indexes_to_free);
+ /* *INDENT-OFF* */
+ pool_foreach_index (index, rt->pool, ({
+ reass = pool_elt_at_index (rt->pool, index);
+ if (now > reass->last_heard + rm->timeout)
+ {
+ vec_add1 (pool_indexes_to_free, index);
+ }
+ }));
+ /* *INDENT-ON* */
+ int *i;
+ /* *INDENT-OFF* */
+ vec_foreach (i, pool_indexes_to_free)
+ {
+ ip6_sv_reass_t *reass = pool_elt_at_index (rt->pool, i[0]);
+ ip6_sv_reass_free (vm, rm, rt, reass);
+ }
+ /* *INDENT-ON* */
+
+ clib_spinlock_unlock (&rt->lock);
+ }
+
+ while (vec_len (vec_icmp_bi) > 0)
+ {
+ vlib_frame_t *f =
+ vlib_get_frame_to_node (vm, rm->ip6_icmp_error_idx);
+ u32 *to_next = vlib_frame_vector_args (f);
+ u32 n_left_to_next = VLIB_FRAME_SIZE - f->n_vectors;
+ int trace_frame = 0;
+ while (vec_len (vec_icmp_bi) > 0 && n_left_to_next > 0)
+ {
+ u32 bi = vec_pop (vec_icmp_bi);
+ vlib_buffer_t *b = vlib_get_buffer (vm, bi);
+ if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ trace_frame = 1;
+ }
+ b->error = node->errors[IP6_ERROR_REASS_TIMEOUT];
+ to_next[0] = bi;
+ ++f->n_vectors;
+ to_next += 1;
+ n_left_to_next -= 1;
+ }
+ f->frame_flags |= (trace_frame * VLIB_FRAME_TRACE);
+ vlib_put_frame_to_node (vm, rm->ip6_icmp_error_idx, f);
+ }
+
+ vec_free (pool_indexes_to_free);
+ vec_free (vec_icmp_bi);
+ if (event_data)
+ {
+ _vec_len (event_data) = 0;
+ }
+ }
+
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip6_sv_reass_expire_node) = {
+ .function = ip6_sv_reass_walk_expired,
+ .format_trace = format_ip6_sv_reass_trace,
+ .type = VLIB_NODE_TYPE_PROCESS,
+ .name = "ip6-sv-reassembly-expire-walk",
+
+ .n_errors = ARRAY_LEN (ip6_sv_reassembly_error_strings),
+ .error_strings = ip6_sv_reassembly_error_strings,
+
+};
+/* *INDENT-ON* */
+
+static u8 *
+format_ip6_sv_reass_key (u8 * s, va_list * args)
+{
+ ip6_sv_reass_key_t *key = va_arg (*args, ip6_sv_reass_key_t *);
+ s = format (s, "xx_id: %u, src: %U, dst: %U, frag_id: %u, proto: %u",
+ key->xx_id, format_ip6_address, &key->src, format_ip6_address,
+ &key->dst, clib_net_to_host_u16 (key->frag_id), key->proto);
+ return s;
+}
+
+static u8 *
+format_ip6_sv_reass (u8 * s, va_list * args)
+{
+ vlib_main_t *vm = va_arg (*args, vlib_main_t *);
+ ip6_sv_reass_t *reass = va_arg (*args, ip6_sv_reass_t *);
+
+ s = format (s, "ID: %lu, key: %U, trace_op_counter: %u\n",
+ reass->id, format_ip6_sv_reass_key, &reass->key,
+ reass->trace_op_counter);
+ vlib_buffer_t *b;
+ u32 *bip;
+ u32 counter = 0;
+ vec_foreach (bip, reass->cached_buffers)
+ {
+ u32 bi = *bip;
+ do
+ {
+ b = vlib_get_buffer (vm, bi);
+ s = format (s, " #%03u: bi: %u\n", counter, bi);
+ ++counter;
+ bi = b->next_buffer;
+ }
+ while (b->flags & VLIB_BUFFER_NEXT_PRESENT);
+ }
+ return s;
+}
+
+static clib_error_t *
+show_ip6_sv_reass (vlib_main_t * vm, unformat_input_t * input,
+ CLIB_UNUSED (vlib_cli_command_t * lmd))
+{
+ ip6_sv_reass_main_t *rm = &ip6_sv_reass_main;
+
+ vlib_cli_output (vm, "---------------------");
+ vlib_cli_output (vm, "IP6 reassembly status");
+ vlib_cli_output (vm, "---------------------");
+ bool details = false;
+ if (unformat (input, "details"))
+ {
+ details = true;
+ }
+
+ u32 sum_reass_n = 0;
+ u64 sum_buffers_n = 0;
+ ip6_sv_reass_t *reass;
+ uword thread_index;
+ const uword nthreads = vlib_num_workers () + 1;
+ for (thread_index = 0; thread_index < nthreads; ++thread_index)
+ {
+ ip6_sv_reass_per_thread_t *rt = &rm->per_thread_data[thread_index];
+ clib_spinlock_lock (&rt->lock);
+ if (details)
+ {
+ /* *INDENT-OFF* */
+ pool_foreach (reass, rt->pool, {
+ vlib_cli_output (vm, "%U", format_ip6_sv_reass, vm, reass);
+ });
+ /* *INDENT-ON* */
+ }
+ sum_reass_n += rt->reass_n;
+ clib_spinlock_unlock (&rt->lock);
+ }
+ vlib_cli_output (vm, "---------------------");
+ vlib_cli_output (vm, "Current IP6 reassemblies count: %lu\n",
+ (long unsigned) sum_reass_n);
+ vlib_cli_output (vm, "Maximum configured concurrent IP6 reassemblies per "
+ "worker-thread: %lu\n", (long unsigned) rm->max_reass_n);
+ vlib_cli_output (vm, "Buffers in use: %lu\n",
+ (long unsigned) sum_buffers_n);
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (show_ip6_sv_reassembly_cmd, static) = {
+ .path = "show ip6-sv-reassembly",
+ .short_help = "show ip6-sv-reassembly [details]",
+ .function = show_ip6_sv_reass,
+};
+/* *INDENT-ON* */
+
+#ifndef CLIB_MARCH_VARIANT
+vnet_api_error_t
+ip6_sv_reass_enable_disable (u32 sw_if_index, u8 enable_disable)
+{
+ return vnet_feature_enable_disable ("ip6-unicast",
+ "ip6-sv-reassembly-feature",
+ sw_if_index, enable_disable, 0, 0);
+}
+#endif /* CLIB_MARCH_VARIANT */
+
+#define foreach_ip6_sv_reassembly_handoff_error \
+_(CONGESTION_DROP, "congestion drop")
+
+
+typedef enum
+{
+#define _(sym,str) IP6_SV_REASSEMBLY_HANDOFF_ERROR_##sym,
+ foreach_ip6_sv_reassembly_handoff_error
+#undef _
+ IP6_SV_REASSEMBLY_HANDOFF_N_ERROR,
+} ip6_sv_reassembly_handoff_error_t;
+
+static char *ip6_sv_reassembly_handoff_error_strings[] = {
+#define _(sym,string) string,
+ foreach_ip6_sv_reassembly_handoff_error
+#undef _
+};
+
+typedef struct
+{
+ u32 next_worker_index;
+} ip6_sv_reassembly_handoff_trace_t;
+
+static u8 *
+format_ip6_sv_reassembly_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 *);
+ ip6_sv_reassembly_handoff_trace_t *t =
+ va_arg (*args, ip6_sv_reassembly_handoff_trace_t *);
+
+ s =
+ format (s, "ip6-sv-reassembly-handoff: next-worker %d",
+ t->next_worker_index);
+
+ return s;
+}
+
+always_inline uword
+ip6_sv_reassembly_handoff_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, bool is_feature)
+{
+ ip6_sv_reass_main_t *rm = &ip6_sv_reass_main;
+
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
+ u32 n_enq, n_left_from, *from;
+ u16 thread_indices[VLIB_FRAME_SIZE], *ti;
+ u32 fq_index;
+
+ 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;
+
+ fq_index = (is_feature) ? rm->fq_feature_index : rm->fq_index;
+
+ while (n_left_from > 0)
+ {
+ ti[0] = vnet_buffer (b[0])->ip.reass.owner_thread_index;
+
+ if (PREDICT_FALSE
+ ((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ ip6_sv_reassembly_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, fq_index, from, thread_indices,
+ frame->n_vectors, 1);
+
+ if (n_enq < frame->n_vectors)
+ vlib_node_increment_counter (vm, node->node_index,
+ IP6_SV_REASSEMBLY_HANDOFF_ERROR_CONGESTION_DROP,
+ frame->n_vectors - n_enq);
+ return frame->n_vectors;
+}
+
+VLIB_NODE_FN (ip6_sv_reassembly_handoff_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return ip6_sv_reassembly_handoff_inline (vm, node, frame,
+ false /* is_feature */ );
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip6_sv_reassembly_handoff_node) = {
+ .name = "ip6-sv-reassembly-handoff",
+ .vector_size = sizeof (u32),
+ .n_errors = ARRAY_LEN(ip6_sv_reassembly_handoff_error_strings),
+ .error_strings = ip6_sv_reassembly_handoff_error_strings,
+ .format_trace = format_ip6_sv_reassembly_handoff_trace,
+
+ .n_next_nodes = 1,
+
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+
+
+VLIB_NODE_FN (ip6_sv_reassembly_feature_handoff_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return ip6_sv_reassembly_handoff_inline (vm, node, frame, true /* is_feature */ );
+}
+
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip6_sv_reassembly_feature_handoff_node) = {
+ .name = "ip6-sv-reass-feature-hoff",
+ .vector_size = sizeof (u32),
+ .n_errors = ARRAY_LEN(ip6_sv_reassembly_handoff_error_strings),
+ .error_strings = ip6_sv_reassembly_handoff_error_strings,
+ .format_trace = format_ip6_sv_reassembly_handoff_trace,
+
+ .n_next_nodes = 1,
+
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+#ifndef CLIB_MARCH_VARIANT
+int
+ip6_sv_reass_enable_disable_with_refcnt (u32 sw_if_index, int is_enable)
+{
+ ip6_sv_reass_main_t *rm = &ip6_sv_reass_main;
+ if (is_enable)
+ {
+ if (!rm->feature_use_refcount)
+ {
+ ++rm->feature_use_refcount;
+ return vnet_feature_enable_disable ("ip6-unicast",
+ "ip6-sv-reassembly-feature",
+ sw_if_index, 1, 0, 0);
+ }
+ ++rm->feature_use_refcount;
+ }
+ else
+ {
+ --rm->feature_use_refcount;
+ if (!rm->feature_use_refcount)
+ return vnet_feature_enable_disable ("ip6-unicast",
+ "ip6-sv-reassembly-feature",
+ sw_if_index, 0, 0, 0);
+ }
+ return -1;
+}
+#endif
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / commitdiff