ip/ip4_source_and_port_range_check.c
ip/ip4_source_check.c
ip/reass/ip4_full_reass.c
+ ip/reass/ip4_sv_reass.c
ip/ip6_format.c
ip/ip6_forward.c
ip/ip6_ll_table.c
ip/ip6_neighbor.c
ip/ip6_pg.c
ip/reass/ip6_full_reass.c
+ ip/reass/ip6_sv_reass.c
ip/rd_cp.c
ip/ip_neighbor.c
ip/ip_api.c
ip/reass/ip4_full_reass.c
ip/ip6_hop_by_hop.c
ip/reass/ip6_full_reass.c
+ ip/reass/ip4_sv_reass.c
+ ip/ip6_hop_by_hop.c
+ ip/reass/ip6_full_reass.c
+ ip/reass/ip6_sv_reass.c
ip/ip6_input.c
ip/ip6_punt_drop.c
ip/punt_node.c
/* reassembly */
union
{
- /* in/out variables */
+ /* group input/handoff as handoff is done before input is consumed,
+ * this way we can handoff while keeping input variables intact */
struct
{
- u32 next_index; /* index of next node - used by custom apps */
- u32 error_next_index; /* index of next node if error - used by custom apps */
- u16 estimated_mtu; /* estimated MTU calculated during reassembly */
- u16 owner_thread_index;
+ /* input variables */
+ struct
+ {
+ u32 next_index; /* index of next node - used by custom apps */
+ u32 error_next_index; /* index of next node if error - used by custom apps */
+ };
+ /* handoff variables */
+ struct
+ {
+ u16 owner_thread_index;
+ };
+ };
+ /* output variables */
+ struct
+ {
+ union
+ {
+ /* shallow virtual reassembly output variables */
+ struct
+ {
+ u8 ip_proto; /* protocol in ip header */
+ u16 l4_src_port; /* tcp/udp/icmp src port */
+ u16 l4_dst_port; /* tcp/udp/icmp dst port */
+ };
+ /* full reassembly output variables */
+ struct
+ {
+ u16 estimated_mtu; /* estimated MTU calculated during reassembly */
+ };
+ };
};
/* internal variables used during reassembly */
struct
u16 range_last;
u32 next_range_bi;
u16 ip6_frag_hdr_offset;
- u16 owner_feature_thread_index;
};
} reass;
};
-
} ip;
/*
u16 id;
};
+enum ip_reass_type
+{
+ IP_REASS_TYPE_FULL = 0,
+ IP_REASS_TYPE_SHALLOW_VIRTUAL = 0x1,
+};
+
autoreply define ip_reassembly_set
{
u32 client_index;
u32 max_reassembly_length;
u32 expire_walk_interval_ms;
u8 is_ip6;
+ vl_api_ip_reass_type_t type;
};
define ip_reassembly_get
u32 client_index;
u32 context;
u8 is_ip6;
+ vl_api_ip_reass_type_t type;
};
define ip_reassembly_get_reply
u32 sw_if_index;
u8 enable_ip4;
u8 enable_ip6;
+ vl_api_ip_reass_type_t type;
};
/*
_ (REASS_FRAGMENT_CHAIN_TOO_LONG, "fragment chain too long (drop)") \
_ (REASS_NO_BUF, "out of buffers (drop)") \
_ (REASS_MALFORMED_PACKET, "malformed packets") \
- _ (REASS_INTERNAL_ERROR, "drops due to internal reassembly error")
+ _ (REASS_INTERNAL_ERROR, "drops due to internal reassembly error") \
+ _ (REASS_UNSUPP_IP_PROT, "unsupported ip protocol")
typedef enum
{
_ (REASS_FRAGMENT_CHAIN_TOO_LONG, "fragment chain too long (drop)") \
_ (REASS_NO_BUF, "out of buffers (drop)") \
_ (REASS_TIMEOUT, "fragments dropped due to reassembly timeout") \
- _ (REASS_INTERNAL_ERROR, "drops due to internal reassembly error")
+ _ (REASS_INTERNAL_ERROR, "drops due to internal reassembly error") \
+ _ (REASS_UNSUPP_IP_PROTO, "unsupported ip protocol")
typedef enum
{
#include <vnet/fib/ip6_fib.h>
#include <vnet/fib/fib_path_list.h>
#include <vnet/ip/ip6_hop_by_hop.h>
+#include <vnet/ip/reass/ip4_sv_reass.h>
#include <vnet/ip/reass/ip4_full_reass.h>
+#include <vnet/ip/reass/ip6_sv_reass.h>
#include <vnet/ip/reass/ip6_full_reass.h>
#include <vnet/ethernet/arp.h>
#include <vnet/ip/ip_types_api.h>
{
vl_api_ip_reassembly_set_reply_t *rmp;
int rv = 0;
- if (mp->is_ip6)
- {
- rv = ip6_full_reass_set (clib_net_to_host_u32 (mp->timeout_ms),
- clib_net_to_host_u32 (mp->max_reassemblies),
- clib_net_to_host_u32
- (mp->max_reassembly_length),
- clib_net_to_host_u32
- (mp->expire_walk_interval_ms));
- }
- else
+ switch ((vl_api_ip_reass_type_t) clib_net_to_host_u32 (mp->type))
{
- rv = ip4_full_reass_set (clib_net_to_host_u32 (mp->timeout_ms),
- clib_net_to_host_u32 (mp->max_reassemblies),
- clib_net_to_host_u32
- (mp->max_reassembly_length),
- clib_net_to_host_u32
- (mp->expire_walk_interval_ms));
+ case IP_REASS_TYPE_FULL:
+ if (mp->is_ip6)
+ {
+ rv = ip6_full_reass_set (clib_net_to_host_u32 (mp->timeout_ms),
+ clib_net_to_host_u32
+ (mp->max_reassemblies),
+ clib_net_to_host_u32
+ (mp->max_reassembly_length),
+ clib_net_to_host_u32
+ (mp->expire_walk_interval_ms));
+ }
+ else
+ {
+ rv = ip4_full_reass_set (clib_net_to_host_u32 (mp->timeout_ms),
+ clib_net_to_host_u32
+ (mp->max_reassemblies),
+ clib_net_to_host_u32
+ (mp->max_reassembly_length),
+ clib_net_to_host_u32
+ (mp->expire_walk_interval_ms));
+ }
+ break;
+ case IP_REASS_TYPE_SHALLOW_VIRTUAL:
+ if (mp->is_ip6)
+ {
+ rv =
+ ip6_sv_reass_set (clib_net_to_host_u32 (mp->timeout_ms),
+ clib_net_to_host_u32 (mp->max_reassemblies),
+ clib_net_to_host_u32
+ (mp->max_reassembly_length),
+ clib_net_to_host_u32
+ (mp->expire_walk_interval_ms));
+ }
+ else
+ {
+ rv = ip4_sv_reass_set (clib_net_to_host_u32 (mp->timeout_ms),
+ clib_net_to_host_u32 (mp->max_reassemblies),
+ clib_net_to_host_u32
+ (mp->max_reassembly_length),
+ clib_net_to_host_u32
+ (mp->expire_walk_interval_ms));
+ }
+ break;
}
REPLY_MACRO (VL_API_IP_REASSEMBLY_SET_REPLY);
rmp->_vl_msg_id = ntohs (VL_API_IP_REASSEMBLY_GET_REPLY);
rmp->context = mp->context;
rmp->retval = 0;
- if (mp->is_ip6)
+ u32 timeout_ms;
+ u32 max_reassemblies;
+ u32 max_reassembly_length;
+ u32 expire_walk_interval_ms;
+ switch ((vl_api_ip_reass_type_t) clib_net_to_host_u32 (mp->type))
{
- rmp->is_ip6 = 1;
- ip6_full_reass_get (&rmp->timeout_ms, &rmp->max_reassemblies,
- &rmp->max_reassembly_length,
- &rmp->expire_walk_interval_ms);
- }
- else
- {
- rmp->is_ip6 = 0;
- ip4_full_reass_get (&rmp->timeout_ms, &rmp->max_reassemblies,
- &rmp->max_reassembly_length,
- &rmp->expire_walk_interval_ms);
+ case IP_REASS_TYPE_FULL:
+ if (mp->is_ip6)
+ {
+ rmp->is_ip6 = 1;
+ ip6_full_reass_get (&timeout_ms, &max_reassemblies,
+ &max_reassembly_length,
+ &expire_walk_interval_ms);
+ }
+ else
+ {
+ rmp->is_ip6 = 0;
+ ip4_full_reass_get (&timeout_ms, &max_reassemblies,
+ &max_reassembly_length,
+ &expire_walk_interval_ms);
+ }
+ break;
+ case IP_REASS_TYPE_SHALLOW_VIRTUAL:
+ if (mp->is_ip6)
+ {
+ rmp->is_ip6 = 1;
+ ip6_sv_reass_get (&timeout_ms, &max_reassemblies,
+ &max_reassembly_length, &expire_walk_interval_ms);
+ }
+ else
+ {
+ rmp->is_ip6 = 0;
+ ip4_sv_reass_get (&timeout_ms, &max_reassemblies,
+ &max_reassembly_length, &expire_walk_interval_ms);
+ }
+ break;
}
rmp->timeout_ms = clib_host_to_net_u32 (rmp->timeout_ms);
rmp->max_reassemblies = clib_host_to_net_u32 (rmp->max_reassemblies);
{
vl_api_ip_reassembly_enable_disable_reply_t *rmp;
int rv = 0;
- rv = ip4_full_reass_enable_disable (clib_net_to_host_u32 (mp->sw_if_index),
- mp->enable_ip4);
- if (0 == rv)
+ switch ((vl_api_ip_reass_type_t) clib_net_to_host_u32 (mp->type))
{
+ case IP_REASS_TYPE_FULL:
rv =
- ip6_full_reass_enable_disable (clib_net_to_host_u32 (mp->sw_if_index),
- mp->enable_ip6);
+ ip4_full_reass_enable_disable (clib_net_to_host_u32 (mp->sw_if_index),
+ mp->enable_ip4);
+ if (0 == rv)
+ rv =
+ ip6_full_reass_enable_disable (clib_net_to_host_u32
+ (mp->sw_if_index), mp->enable_ip6);
+ break;
+ case IP_REASS_TYPE_SHALLOW_VIRTUAL:
+ rv =
+ ip4_sv_reass_enable_disable (clib_net_to_host_u32 (mp->sw_if_index),
+ mp->enable_ip4);
+ if (0 == rv)
+ {
+ rv =
+ ip6_sv_reass_enable_disable (clib_net_to_host_u32
+ (mp->sw_if_index), mp->enable_ip6);
+ }
+ break;
}
REPLY_MACRO (VL_API_IP_REASSEMBLY_ENABLE_DISABLE_REPLY);
if (PREDICT_FALSE (do_handoff))
{
next0 = IP4_FULL_REASS_NEXT_HANDOFF;
- if (is_feature)
- vnet_buffer (b0)->ip.reass.owner_feature_thread_index =
- kv.v.memory_owner_thread_index;
- else
- vnet_buffer (b0)->ip.reass.owner_thread_index =
- kv.v.memory_owner_thread_index;
+ vnet_buffer (b0)->ip.reass.owner_thread_index =
+ kv.v.memory_owner_thread_index;
}
else if (reass)
{
case IP4_REASS_RC_HANDOFF:
next0 = IP4_FULL_REASS_NEXT_HANDOFF;
b0 = vlib_get_buffer (vm, bi0);
- if (is_feature)
- vnet_buffer (b0)->ip.reass.owner_feature_thread_index =
- handoff_thread_idx;
- else
- vnet_buffer (b0)->ip.reass.owner_thread_index =
- handoff_thread_idx;
+ vnet_buffer (b0)->ip.reass.owner_thread_index =
+ handoff_thread_idx;
break;
case IP4_REASS_RC_TOO_MANY_FRAGMENTS:
vlib_node_increment_counter (vm, node->node_index,
{
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
- if (is_feature)
- ip4_full_reass_add_trace (vm, node, rm, NULL,
- bi0, HANDOFF, 0,
- vnet_buffer (b0)->ip.
- reass.owner_feature_thread_index);
- else
- ip4_full_reass_add_trace (vm, node, rm, NULL,
- bi0, HANDOFF, 0,
- vnet_buffer (b0)->ip.
- reass.owner_thread_index);
+ ip4_full_reass_add_trace (vm, node, rm, NULL, bi0,
+ HANDOFF, 0,
+ vnet_buffer (b0)->ip.
+ reass.owner_thread_index);
}
}
else if (is_feature && IP4_ERROR_NONE == error0)
while (n_left_from > 0)
{
- ti[0] =
- (is_feature) ? vnet_buffer (b[0])->ip.
- reass.owner_feature_thread_index : vnet_buffer (b[0])->ip.
- reass.owner_thread_index;
+ ti[0] = vnet_buffer (b[0])->ip.reass.owner_thread_index;
if (PREDICT_FALSE
((node->flags & VLIB_NODE_FLAG_TRACE)
--- /dev/null
+/*
+ * 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 IPv4 Shallow Virtual Reassembly.
+ *
+ * This file contains the source code for IPv4 Shallow Virtual reassembly.
+ */
+
+#include <vppinfra/vec.h>
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ip/ip4_to_ip6.h>
+#include <vppinfra/fifo.h>
+#include <vppinfra/bihash_16_8.h>
+#include <vnet/ip/reass/ip4_sv_reass.h>
+
+#define MSEC_PER_SEC 1000
+#define IP4_SV_REASS_TIMEOUT_DEFAULT_MS 100
+#define IP4_SV_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS 10000 // 10 seconds default
+#define IP4_SV_REASS_MAX_REASSEMBLIES_DEFAULT 1024
+#define IP4_SV_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT 3
+#define IP4_SV_REASS_HT_LOAD_FACTOR (0.75)
+
+typedef enum
+{
+ IP4_SV_REASS_RC_OK,
+ IP4_SV_REASS_RC_TOO_MANY_FRAGMENTS,
+ IP4_SV_REASS_RC_UNSUPP_IP_PROTO,
+} ip4_sv_reass_rc_t;
+
+typedef struct
+{
+ union
+ {
+ struct
+ {
+ u32 xx_id;
+ ip4_address_t src;
+ ip4_address_t dst;
+ u16 frag_id;
+ u8 proto;
+ u8 unused;
+ };
+ u64 as_u64[2];
+ };
+} ip4_sv_reass_key_t;
+
+typedef union
+{
+ struct
+ {
+ u32 reass_index;
+ u32 thread_index;
+ };
+ u64 as_u64;
+} ip4_sv_reass_val_t;
+
+typedef union
+{
+ struct
+ {
+ ip4_sv_reass_key_t k;
+ ip4_sv_reass_val_t v;
+ };
+ clib_bihash_kv_16_8_t kv;
+} ip4_sv_reass_kv_t;
+
+typedef struct
+{
+ // hash table key
+ ip4_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;
+ // minimum fragment length for this reassembly - used to estimate MTU
+ u16 min_fragment_length;
+ // 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;
+ u32 next_index;
+ // lru indexes
+ u32 lru_prev;
+ u32 lru_next;
+} ip4_sv_reass_t;
+
+typedef struct
+{
+ ip4_sv_reass_t *pool;
+ u32 reass_n;
+ u32 id_counter;
+ clib_spinlock_t lock;
+ // lru indexes
+ u32 lru_first;
+ u32 lru_last;
+
+} ip4_sv_reass_per_thread_t;
+
+typedef struct
+{
+ // IPv4 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;
+
+ // IPv4 runtime
+ clib_bihash_16_8_t hash;
+ // per-thread data
+ ip4_sv_reass_per_thread_t *per_thread_data;
+
+ // convenience
+ vlib_main_t *vlib_main;
+ vnet_main_t *vnet_main;
+
+ // node index of ip4-drop node
+ u32 ip4_drop_idx;
+ u32 ip4_sv_reass_expire_node_idx;
+
+ /** Worker handoff */
+ u32 fq_index;
+ u32 fq_feature_index;
+
+ // reference count for enabling/disabling feature
+ u32 feature_use_refcount;
+
+} ip4_sv_reass_main_t;
+
+extern ip4_sv_reass_main_t ip4_sv_reass_main;
+
+#ifndef CLIB_MARCH_VARIANT
+ip4_sv_reass_main_t ip4_sv_reass_main;
+#endif /* CLIB_MARCH_VARIANT */
+
+typedef enum
+{
+ IP4_SV_REASSEMBLY_NEXT_INPUT,
+ IP4_SV_REASSEMBLY_NEXT_DROP,
+ IP4_SV_REASSEMBLY_NEXT_HANDOFF,
+ IP4_SV_REASSEMBLY_N_NEXT,
+} ip4_sv_reass_next_t;
+
+typedef enum
+{
+ REASS_FRAGMENT_CACHE,
+ REASS_FINISH,
+ REASS_FRAGMENT_FORWARD,
+} ip4_sv_reass_trace_operation_e;
+
+typedef struct
+{
+ ip4_sv_reass_trace_operation_e action;
+ u32 reass_id;
+ u32 op_id;
+ u8 ip_proto;
+ u16 l4_src_port;
+ u16 l4_dst_port;
+} ip4_sv_reass_trace_t;
+
+extern vlib_node_registration_t ip4_sv_reass_node;
+extern vlib_node_registration_t ip4_sv_reass_node_feature;
+
+static u8 *
+format_ip4_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 *);
+ ip4_sv_reass_trace_t *t = va_arg (*args, ip4_sv_reass_trace_t *);
+ s = format (s, "reass id: %u, op id: %u ", t->reass_id, t->op_id);
+ switch (t->action)
+ {
+ 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
+ip4_sv_reass_add_trace (vlib_main_t * vm, vlib_node_runtime_t * node,
+ ip4_sv_reass_main_t * rm, ip4_sv_reass_t * reass,
+ u32 bi, ip4_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);
+ ip4_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_ip4_sv_reass_trace, NULL, NULL, t);
+ printf ("%.*s\n", vec_len (s), s);
+ fflush (stdout);
+ vec_reset_length (s);
+#endif
+}
+
+
+always_inline void
+ip4_sv_reass_free (vlib_main_t * vm, ip4_sv_reass_main_t * rm,
+ ip4_sv_reass_per_thread_t * rt, ip4_sv_reass_t * reass)
+{
+ clib_bihash_kv_16_8_t kv;
+ kv.key[0] = reass->key.as_u64[0];
+ kv.key[1] = reass->key.as_u64[1];
+ clib_bihash_add_del_16_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)
+ {
+ ip4_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)
+ {
+ ip4_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
+ip4_sv_reass_init (ip4_sv_reass_t * reass)
+{
+ reass->cached_buffers = NULL;
+ reass->is_complete = false;
+}
+
+always_inline ip4_sv_reass_t *
+ip4_sv_reass_find_or_create (vlib_main_t * vm, ip4_sv_reass_main_t * rm,
+ ip4_sv_reass_per_thread_t * rt,
+ ip4_sv_reass_kv_t * kv, u8 * do_handoff)
+{
+ ip4_sv_reass_t *reass = NULL;
+ f64 now = vlib_time_now (rm->vlib_main);
+
+ if (!clib_bihash_search_16_8
+ (&rm->hash, (clib_bihash_kv_16_8_t *) kv, (clib_bihash_kv_16_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)
+ {
+ ip4_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 && rm->max_reass_n)
+ {
+ reass = pool_elt_at_index (rt->pool, rt->lru_last);
+ ip4_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;
+ ip4_sv_reass_init (reass);
+ ++rt->reass_n;
+ reass->lru_prev = reass->lru_next = ~0;
+
+ if (~0 != rt->lru_last)
+ {
+ ip4_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_16_8_t *) kv)->key[0];
+ reass->key.as_u64[1] = ((clib_bihash_kv_16_8_t *) kv)->key[1];
+ kv->v.reass_index = (reass - rt->pool);
+ kv->v.thread_index = vm->thread_index;
+ reass->last_heard = now;
+
+ if (clib_bihash_add_del_16_8 (&rm->hash, (clib_bihash_kv_16_8_t *) kv, 1))
+ {
+ ip4_sv_reass_free (vm, rm, rt, reass);
+ reass = NULL;
+ }
+
+ return reass;
+}
+
+always_inline ip4_sv_reass_rc_t
+ip4_sv_reass_update (vlib_main_t * vm, vlib_node_runtime_t * node,
+ ip4_sv_reass_main_t * rm, ip4_sv_reass_per_thread_t * rt,
+ ip4_sv_reass_t * reass, u32 bi0)
+{
+ vlib_buffer_t *fb = vlib_get_buffer (vm, bi0);
+ ip4_sv_reass_rc_t rc = IP4_SV_REASS_RC_OK;
+ ip4_header_t *fip = vlib_buffer_get_current (fb);
+ const u32 fragment_first = ip4_get_fragment_offset_bytes (fip);
+ if (0 == fragment_first)
+ {
+ reass->ip_proto = fip->protocol;
+ reass->l4_src_port = ip4_get_port (fip, 1);
+ reass->l4_dst_port = ip4_get_port (fip, 0);
+ if (!reass->l4_src_port || !reass->l4_dst_port)
+ return IP4_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))
+ {
+ ip4_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))
+ {
+ ip4_sv_reass_add_trace (vm, node, rm, reass, bi0,
+ REASS_FRAGMENT_CACHE, ~0, ~0, ~0);
+ }
+ if (vec_len (reass->cached_buffers) > rm->max_reass_len)
+ {
+ rc = IP4_SV_REASS_RC_TOO_MANY_FRAGMENTS;
+ }
+ }
+ return rc;
+}
+
+always_inline uword
+ip4_sv_reass_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame, bool is_feature, bool is_custom)
+{
+ u32 *from = vlib_frame_vector_args (frame);
+ u32 n_left_from, n_left_to_next, *to_next, next_index;
+ ip4_sv_reass_main_t *rm = &ip4_sv_reass_main;
+ ip4_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;
+ u32 error0 = IP4_ERROR_NONE;
+
+ bi0 = from[0];
+ b0 = vlib_get_buffer (vm, bi0);
+
+ ip4_header_t *ip0 = vlib_buffer_get_current (b0);
+ if (!ip4_get_fragment_more (ip0) && !ip4_get_fragment_offset (ip0))
+ {
+ // this is a regular packet - no fragmentation
+ vnet_buffer (b0)->ip.reass.ip_proto = ip0->protocol;
+ vnet_buffer (b0)->ip.reass.l4_src_port = ip4_get_port (ip0, 1);
+ vnet_buffer (b0)->ip.reass.l4_dst_port = ip4_get_port (ip0, 0);
+ next0 = IP4_SV_REASSEMBLY_NEXT_INPUT;
+ goto packet_enqueue;
+ }
+ const u32 fragment_first = ip4_get_fragment_offset_bytes (ip0);
+ const u32 fragment_length =
+ clib_net_to_host_u16 (ip0->length) - ip4_header_bytes (ip0);
+ const u32 fragment_last = fragment_first + fragment_length - 1;
+ if (fragment_first > fragment_last || fragment_first + fragment_length > UINT16_MAX - 20 || (fragment_length < 8 && ip4_get_fragment_more (ip0))) // 8 is minimum frag length per RFC 791
+ {
+ next0 = IP4_SV_REASSEMBLY_NEXT_DROP;
+ error0 = IP4_ERROR_REASS_MALFORMED_PACKET;
+ goto packet_enqueue;
+ }
+ ip4_sv_reass_kv_t kv;
+ u8 do_handoff = 0;
+
+ kv.k.as_u64[0] =
+ (u64) vec_elt (ip4_main.fib_index_by_sw_if_index,
+ vnet_buffer (b0)->sw_if_index[VLIB_RX]) |
+ (u64) ip0->src_address.as_u32 << 32;
+ kv.k.as_u64[1] =
+ (u64) ip0->dst_address.
+ as_u32 | (u64) ip0->fragment_id << 32 | (u64) ip0->protocol << 48;
+
+ ip4_sv_reass_t *reass =
+ ip4_sv_reass_find_or_create (vm, rm, rt, &kv, &do_handoff);
+
+ if (PREDICT_FALSE (do_handoff))
+ {
+ next0 = IP4_SV_REASSEMBLY_NEXT_HANDOFF;
+ vnet_buffer (b0)->ip.reass.owner_thread_index =
+ kv.v.thread_index;
+ goto packet_enqueue;
+ }
+
+ if (!reass)
+ {
+ next0 = IP4_SV_REASSEMBLY_NEXT_DROP;
+ error0 = IP4_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 = IP4_SV_REASSEMBLY_NEXT_INPUT;
+ error0 = IP4_ERROR_NONE;
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ip4_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;
+ }
+
+ ip4_sv_reass_rc_t rc =
+ ip4_sv_reass_update (vm, node, rm, rt, reass, bi0);
+ switch (rc)
+ {
+ case IP4_SV_REASS_RC_OK:
+ /* nothing to do here */
+ break;
+ case IP4_SV_REASS_RC_TOO_MANY_FRAGMENTS:
+ vlib_node_increment_counter (vm, node->node_index,
+ IP4_ERROR_REASS_FRAGMENT_CHAIN_TOO_LONG,
+ 1);
+ ip4_sv_reass_free (vm, rm, rt, reass);
+ goto next_packet;
+ break;
+ case IP4_SV_REASS_RC_UNSUPP_IP_PROTO:
+ vlib_node_increment_counter (vm, node->node_index,
+ IP4_ERROR_REASS_FRAGMENT_CHAIN_TOO_LONG,
+ 1);
+ ip4_sv_reass_free (vm, rm, rt, reass);
+ goto next_packet;
+ break;
+ }
+ if (reass->is_complete)
+ {
+ u32 idx;
+ vec_foreach_index (idx, reass->cached_buffers)
+ {
+ u32 bi0 = vec_elt (reass->cached_buffers, idx);
+ vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
+ u32 next0 = IP4_SV_REASSEMBLY_NEXT_INPUT;
+ if (is_feature)
+ {
+ vnet_feature_next (&next0, b0);
+ }
+ if (is_custom)
+ {
+ next0 = vnet_buffer (b0)->ip.reass.next_index;
+ }
+ 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;
+ 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))
+ {
+ ip4_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:
+ b0->error = node->errors[error0];
+
+ to_next[0] = bi0;
+ to_next += 1;
+ n_left_to_next -= 1;
+ if (is_feature && IP4_ERROR_NONE == error0)
+ {
+ b0 = vlib_get_buffer (vm, bi0);
+ vnet_feature_next (&next0, b0);
+ }
+ if (is_custom)
+ {
+ next0 = vnet_buffer (b0)->ip.reass.next_index;
+ }
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, 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 *ip4_sv_reass_error_strings[] = {
+#define _(sym, string) string,
+ foreach_ip4_error
+#undef _
+};
+
+VLIB_NODE_FN (ip4_sv_reass_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return ip4_sv_reass_inline (vm, node, frame, false /* is_feature */ ,
+ false /* is_custom */ );
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip4_sv_reass_node) = {
+ .name = "ip4-sv-reassembly",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ip4_sv_reass_trace,
+ .n_errors = ARRAY_LEN (ip4_sv_reass_error_strings),
+ .error_strings = ip4_sv_reass_error_strings,
+ .n_next_nodes = IP4_SV_REASSEMBLY_N_NEXT,
+ .next_nodes =
+ {
+ [IP4_SV_REASSEMBLY_NEXT_INPUT] = "ip4-input",
+ [IP4_SV_REASSEMBLY_NEXT_DROP] = "ip4-drop",
+ [IP4_SV_REASSEMBLY_NEXT_HANDOFF] = "ip4-sv-reassembly-handoff",
+
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FN (ip4_sv_reass_node_feature) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return ip4_sv_reass_inline (vm, node, frame, true /* is_feature */ ,
+ false /* is_custom */ );
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip4_sv_reass_node_feature) = {
+ .name = "ip4-sv-reassembly-feature",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ip4_sv_reass_trace,
+ .n_errors = ARRAY_LEN (ip4_sv_reass_error_strings),
+ .error_strings = ip4_sv_reass_error_strings,
+ .n_next_nodes = IP4_SV_REASSEMBLY_N_NEXT,
+ .next_nodes =
+ {
+ [IP4_SV_REASSEMBLY_NEXT_INPUT] = "ip4-input",
+ [IP4_SV_REASSEMBLY_NEXT_DROP] = "ip4-drop",
+ [IP4_SV_REASSEMBLY_NEXT_HANDOFF] = "ip4-sv-reass-feature-hoff",
+ },
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VNET_FEATURE_INIT (ip4_sv_reass_feature) = {
+ .arc_name = "ip4-unicast",
+ .node_name = "ip4-sv-reassembly-feature",
+ .runs_before = VNET_FEATURES ("ip4-lookup"),
+ .runs_after = 0,
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip4_sv_reass_custom_node) = {
+ .name = "ip4-sv-reassembly-custom-next",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ip4_sv_reass_trace,
+ .n_errors = ARRAY_LEN (ip4_sv_reass_error_strings),
+ .error_strings = ip4_sv_reass_error_strings,
+ .n_next_nodes = IP4_SV_REASSEMBLY_N_NEXT,
+ .next_nodes =
+ {
+ [IP4_SV_REASSEMBLY_NEXT_INPUT] = "ip4-input",
+ [IP4_SV_REASSEMBLY_NEXT_DROP] = "ip4-drop",
+ [IP4_SV_REASSEMBLY_NEXT_HANDOFF] = "ip4-sv-reassembly-handoff",
+
+ },
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FN (ip4_sv_reass_custom_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return ip4_sv_reass_inline (vm, node, frame, false /* is_feature */ ,
+ true /* is_custom */ );
+}
+
+#ifndef CLIB_MARCH_VARIANT
+always_inline u32
+ip4_sv_reass_get_nbuckets ()
+{
+ ip4_sv_reass_main_t *rm = &ip4_sv_reass_main;
+ u32 nbuckets;
+ u8 i;
+
+ nbuckets = (u32) (rm->max_reass_n / IP4_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
+{
+ IP4_EVENT_CONFIG_CHANGED = 1,
+} ip4_sv_reass_event_t;
+
+typedef struct
+{
+ int failure;
+ clib_bihash_16_8_t *new_hash;
+} ip4_rehash_cb_ctx;
+
+#ifndef CLIB_MARCH_VARIANT
+static void
+ip4_rehash_cb (clib_bihash_kv_16_8_t * kv, void *_ctx)
+{
+ ip4_rehash_cb_ctx *ctx = _ctx;
+ if (clib_bihash_add_del_16_8 (ctx->new_hash, kv, 1))
+ {
+ ctx->failure = 1;
+ }
+}
+
+static void
+ip4_sv_reass_set_params (u32 timeout_ms, u32 max_reassemblies,
+ u32 max_reassembly_length,
+ u32 expire_walk_interval_ms)
+{
+ ip4_sv_reass_main.timeout_ms = timeout_ms;
+ ip4_sv_reass_main.timeout = (f64) timeout_ms / (f64) MSEC_PER_SEC;
+ ip4_sv_reass_main.max_reass_n = max_reassemblies;
+ ip4_sv_reass_main.max_reass_len = max_reassembly_length;
+ ip4_sv_reass_main.expire_walk_interval_ms = expire_walk_interval_ms;
+}
+
+vnet_api_error_t
+ip4_sv_reass_set (u32 timeout_ms, u32 max_reassemblies,
+ u32 max_reassembly_length, u32 expire_walk_interval_ms)
+{
+ u32 old_nbuckets = ip4_sv_reass_get_nbuckets ();
+ ip4_sv_reass_set_params (timeout_ms, max_reassemblies,
+ max_reassembly_length, expire_walk_interval_ms);
+ vlib_process_signal_event (ip4_sv_reass_main.vlib_main,
+ ip4_sv_reass_main.ip4_sv_reass_expire_node_idx,
+ IP4_EVENT_CONFIG_CHANGED, 0);
+ u32 new_nbuckets = ip4_sv_reass_get_nbuckets ();
+ if (ip4_sv_reass_main.max_reass_n > 0 && new_nbuckets > old_nbuckets)
+ {
+ clib_bihash_16_8_t new_hash;
+ clib_memset (&new_hash, 0, sizeof (new_hash));
+ ip4_rehash_cb_ctx ctx;
+ ctx.failure = 0;
+ ctx.new_hash = &new_hash;
+ clib_bihash_init_16_8 (&new_hash, "ip4-dr", new_nbuckets,
+ new_nbuckets * 1024);
+ clib_bihash_foreach_key_value_pair_16_8 (&ip4_sv_reass_main.hash,
+ ip4_rehash_cb, &ctx);
+ if (ctx.failure)
+ {
+ clib_bihash_free_16_8 (&new_hash);
+ return -1;
+ }
+ else
+ {
+ clib_bihash_free_16_8 (&ip4_sv_reass_main.hash);
+ clib_memcpy_fast (&ip4_sv_reass_main.hash, &new_hash,
+ sizeof (ip4_sv_reass_main.hash));
+ clib_bihash_copied (&ip4_sv_reass_main.hash, &new_hash);
+ }
+ }
+ return 0;
+}
+
+vnet_api_error_t
+ip4_sv_reass_get (u32 * timeout_ms, u32 * max_reassemblies,
+ u32 * max_reassembly_length, u32 * expire_walk_interval_ms)
+{
+ *timeout_ms = ip4_sv_reass_main.timeout_ms;
+ *max_reassemblies = ip4_sv_reass_main.max_reass_n;
+ *max_reassembly_length = ip4_sv_reass_main.max_reass_len;
+ *expire_walk_interval_ms = ip4_sv_reass_main.expire_walk_interval_ms;
+ return 0;
+}
+
+static clib_error_t *
+ip4_sv_reass_init_function (vlib_main_t * vm)
+{
+ ip4_sv_reass_main_t *rm = &ip4_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 ());
+ ip4_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 *) "ip4-sv-reassembly-expire-walk");
+ ASSERT (node);
+ rm->ip4_sv_reass_expire_node_idx = node->index;
+
+ ip4_sv_reass_set_params (IP4_SV_REASS_TIMEOUT_DEFAULT_MS,
+ IP4_SV_REASS_MAX_REASSEMBLIES_DEFAULT,
+ IP4_SV_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT,
+ IP4_SV_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS);
+
+ nbuckets = ip4_sv_reass_get_nbuckets ();
+ clib_bihash_init_16_8 (&rm->hash, "ip4-dr", nbuckets, nbuckets * 1024);
+
+ node = vlib_get_node_by_name (vm, (u8 *) "ip4-drop");
+ ASSERT (node);
+ rm->ip4_drop_idx = node->index;
+
+ rm->fq_index = vlib_frame_queue_main_init (ip4_sv_reass_node.index, 0);
+ rm->fq_feature_index =
+ vlib_frame_queue_main_init (ip4_sv_reass_node_feature.index, 0);
+
+ return error;
+}
+
+VLIB_INIT_FUNCTION (ip4_sv_reass_init_function);
+#endif /* CLIB_MARCH_VARIANT */
+
+static uword
+ip4_sv_reass_walk_expired (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * f)
+{
+ ip4_sv_reass_main_t *rm = &ip4_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 IP4_EVENT_CONFIG_CHANGED:
+ break;
+ default:
+ clib_warning ("BUG: event type 0x%wx", event_type);
+ break;
+ }
+ f64 now = vlib_time_now (vm);
+
+ ip4_sv_reass_t *reass;
+ int *pool_indexes_to_free = NULL;
+
+ uword thread_index = 0;
+ int index;
+ const uword nthreads = vlib_num_workers () + 1;
+ for (thread_index = 0; thread_index < nthreads; ++thread_index)
+ {
+ ip4_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)
+ {
+ ip4_sv_reass_t *reass = pool_elt_at_index (rt->pool, i[0]);
+ ip4_sv_reass_free (vm, rm, rt, reass);
+ }
+ /* *INDENT-ON* */
+
+ clib_spinlock_unlock (&rt->lock);
+ }
+
+ vec_free (pool_indexes_to_free);
+ if (event_data)
+ {
+ _vec_len (event_data) = 0;
+ }
+ }
+
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip4_sv_reass_expire_node) = {
+ .function = ip4_sv_reass_walk_expired,
+ .type = VLIB_NODE_TYPE_PROCESS,
+ .name = "ip4-sv-reassembly-expire-walk",
+ .format_trace = format_ip4_sv_reass_trace,
+ .n_errors = ARRAY_LEN (ip4_sv_reass_error_strings),
+ .error_strings = ip4_sv_reass_error_strings,
+
+};
+/* *INDENT-ON* */
+
+static u8 *
+format_ip4_sv_reass_key (u8 * s, va_list * args)
+{
+ ip4_sv_reass_key_t *key = va_arg (*args, ip4_sv_reass_key_t *);
+ s =
+ format (s,
+ "xx_id: %u, src: %U, dst: %U, frag_id: %u, proto: %u",
+ key->xx_id, format_ip4_address, &key->src, format_ip4_address,
+ &key->dst, clib_net_to_host_u16 (key->frag_id), key->proto);
+ return s;
+}
+
+static u8 *
+format_ip4_sv_reass (u8 * s, va_list * args)
+{
+ vlib_main_t *vm = va_arg (*args, vlib_main_t *);
+ ip4_sv_reass_t *reass = va_arg (*args, ip4_sv_reass_t *);
+
+ s = format (s, "ID: %lu, key: %U trace_op_counter: %u\n",
+ reass->id, format_ip4_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, ", counter, bi);
+ ++counter;
+ bi = b->next_buffer;
+ }
+ while (b->flags & VLIB_BUFFER_NEXT_PRESENT);
+ }
+ return s;
+}
+
+static clib_error_t *
+show_ip4_reass (vlib_main_t * vm,
+ unformat_input_t * input,
+ CLIB_UNUSED (vlib_cli_command_t * lmd))
+{
+ ip4_sv_reass_main_t *rm = &ip4_sv_reass_main;
+
+ vlib_cli_output (vm, "---------------------");
+ vlib_cli_output (vm, "IP4 reassembly status");
+ vlib_cli_output (vm, "---------------------");
+ bool details = false;
+ if (unformat (input, "details"))
+ {
+ details = true;
+ }
+
+ u32 sum_reass_n = 0;
+ ip4_sv_reass_t *reass;
+ uword thread_index;
+ const uword nthreads = vlib_num_workers () + 1;
+ for (thread_index = 0; thread_index < nthreads; ++thread_index)
+ {
+ ip4_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_ip4_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 IP4 reassemblies count: %lu\n",
+ (long unsigned) sum_reass_n);
+ vlib_cli_output (vm,
+ "Maximum configured concurrent IP4 reassemblies per worker-thread: %lu\n",
+ (long unsigned) rm->max_reass_n);
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (show_ip4_sv_reass_cmd, static) = {
+ .path = "show ip4-sv-reassembly",
+ .short_help = "show ip4-sv-reassembly [details]",
+ .function = show_ip4_reass,
+};
+/* *INDENT-ON* */
+
+#ifndef CLIB_MARCH_VARIANT
+vnet_api_error_t
+ip4_sv_reass_enable_disable (u32 sw_if_index, u8 enable_disable)
+{
+ return vnet_feature_enable_disable ("ip4-unicast",
+ "ip4-sv-reassembly-feature",
+ sw_if_index, enable_disable, 0, 0);
+}
+#endif /* CLIB_MARCH_VARIANT */
+
+
+#define foreach_ip4_sv_reass_handoff_error \
+_(CONGESTION_DROP, "congestion drop")
+
+
+typedef enum
+{
+#define _(sym,str) IP4_SV_REASSEMBLY_HANDOFF_ERROR_##sym,
+ foreach_ip4_sv_reass_handoff_error
+#undef _
+ IP4_SV_REASSEMBLY_HANDOFF_N_ERROR,
+} ip4_sv_reass_handoff_error_t;
+
+static char *ip4_sv_reass_handoff_error_strings[] = {
+#define _(sym,string) string,
+ foreach_ip4_sv_reass_handoff_error
+#undef _
+};
+
+typedef struct
+{
+ u32 next_worker_index;
+} ip4_sv_reass_handoff_trace_t;
+
+static u8 *
+format_ip4_sv_reass_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 *);
+ ip4_sv_reass_handoff_trace_t *t =
+ va_arg (*args, ip4_sv_reass_handoff_trace_t *);
+
+ s =
+ format (s, "ip4-sv-reassembly-handoff: next-worker %d",
+ t->next_worker_index);
+
+ return s;
+}
+
+always_inline uword
+ip4_sv_reass_handoff_node_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, bool is_feature)
+{
+ ip4_sv_reass_main_t *rm = &ip4_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)))
+ {
+ ip4_sv_reass_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,
+ IP4_SV_REASSEMBLY_HANDOFF_ERROR_CONGESTION_DROP,
+ frame->n_vectors - n_enq);
+ return frame->n_vectors;
+}
+
+VLIB_NODE_FN (ip4_sv_reass_handoff_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return ip4_sv_reass_handoff_node_inline (vm, node, frame,
+ false /* is_feature */ );
+}
+
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip4_sv_reass_handoff_node) = {
+ .name = "ip4-sv-reassembly-handoff",
+ .vector_size = sizeof (u32),
+ .n_errors = ARRAY_LEN(ip4_sv_reass_handoff_error_strings),
+ .error_strings = ip4_sv_reass_handoff_error_strings,
+ .format_trace = format_ip4_sv_reass_handoff_trace,
+
+ .n_next_nodes = 1,
+
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+
+/* *INDENT-OFF* */
+VLIB_NODE_FN (ip4_sv_reass_feature_handoff_node) (vlib_main_t * vm,
+ vlib_node_runtime_t *
+ node,
+ vlib_frame_t * frame)
+{
+ return ip4_sv_reass_handoff_node_inline (vm, node, frame,
+ true /* is_feature */ );
+}
+/* *INDENT-ON* */
+
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip4_sv_reass_feature_handoff_node) = {
+ .name = "ip4-sv-reass-feature-hoff",
+ .vector_size = sizeof (u32),
+ .n_errors = ARRAY_LEN(ip4_sv_reass_handoff_error_strings),
+ .error_strings = ip4_sv_reass_handoff_error_strings,
+ .format_trace = format_ip4_sv_reass_handoff_trace,
+
+ .n_next_nodes = 1,
+
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+#ifndef CLIB_MARCH_VARIANT
+int
+ip4_sv_reass_enable_disable_with_refcnt (u32 sw_if_index, int is_enable)
+{
+ ip4_sv_reass_main_t *rm = &ip4_sv_reass_main;
+ if (is_enable)
+ {
+ if (!rm->feature_use_refcount)
+ {
+ ++rm->feature_use_refcount;
+ return vnet_feature_enable_disable ("ip4-unicast",
+ "ip4-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 ("ip4-unicast",
+ "ip4-sv-reassembly-feature",
+ sw_if_index, 0, 0, 0);
+ }
+ return -1;
+}
+
+uword
+ip4_sv_reass_custom_register_next_node (uword node_index)
+{
+ return vlib_node_add_next (vlib_get_main (), ip4_sv_reass_custom_node.index,
+ node_index);
+}
+#endif
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
--- /dev/null
+/*
+ * 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 IPv4 shallow virtual reassembly.
+ *
+ * This file contains the source code for IPv4 shallow virtual reassembly.
+ */
+
+#ifndef __included_ip4_sv_reass_h__
+#define __included_ip4_sv_reass_h__
+
+#include <vnet/api_errno.h>
+#include <vnet/vnet.h>
+
+/**
+ * @brief set ip4 reassembly configuration
+ */
+vnet_api_error_t ip4_sv_reass_set (u32 timeout_ms, u32 max_reassemblies,
+ u32 max_reassembly_length,
+ u32 expire_walk_interval_ms);
+
+/**
+ * @brief get ip4 reassembly configuration
+ */
+vnet_api_error_t ip4_sv_reass_get (u32 * timeout_ms, u32 * max_reassemblies,
+ u32 * max_reassembly_length,
+ u32 * expire_walk_interval_ms);
+
+vnet_api_error_t ip4_sv_reass_enable_disable (u32 sw_if_index,
+ u8 enable_disable);
+
+
+int ip4_sv_reass_enable_disable_with_refcnt (u32 sw_if_index, int is_enable);
+
+uword ip4_sv_reass_custom_register_next_node (uword node_index);
+
+#endif /* __included_ip4_sv_reass_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
if (PREDICT_FALSE (do_handoff))
{
next0 = IP6_FULL_REASSEMBLY_NEXT_HANDOFF;
- if (is_feature)
- vnet_buffer (b0)->ip.reass.owner_feature_thread_index =
- kv.v.memory_owner_thread_index;
- else
- vnet_buffer (b0)->ip.reass.owner_thread_index =
- kv.v.memory_owner_thread_index;
+ vnet_buffer (b0)->ip.reass.owner_thread_index =
+ kv.v.memory_owner_thread_index;
}
else if (reass)
{
case IP6_FULL_REASS_RC_HANDOFF:
next0 = IP6_FULL_REASSEMBLY_NEXT_HANDOFF;
b0 = vlib_get_buffer (vm, bi0);
- if (is_feature)
- vnet_buffer (b0)->ip.reass.owner_feature_thread_index =
- handoff_thread_idx;
- else
- vnet_buffer (b0)->ip.reass.owner_thread_index =
- handoff_thread_idx;
+ vnet_buffer (b0)->ip.reass.owner_thread_index =
+ handoff_thread_idx;
break;
case IP6_FULL_REASS_RC_TOO_MANY_FRAGMENTS:
vlib_node_increment_counter (vm, node->node_index,
{
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
- if (is_feature)
- ip6_full_reass_add_trace (vm, node, rm, NULL, bi0,
- HANDOFF,
- vnet_buffer (b0)->ip.
- reass.owner_feature_thread_index);
- else
- ip6_full_reass_add_trace (vm, node, rm, NULL, bi0,
- HANDOFF,
- vnet_buffer (b0)->ip.
- reass.owner_thread_index);
+ ip6_full_reass_add_trace (vm, node, rm, NULL, bi0,
+ HANDOFF,
+ vnet_buffer (b0)->ip.
+ reass.owner_thread_index);
}
}
else if (is_feature && IP6_ERROR_NONE == error0)
while (n_left_from > 0)
{
- ti[0] =
- (is_feature) ? vnet_buffer (b[0])->ip.
- reass.owner_feature_thread_index : vnet_buffer (b[0])->ip.
- reass.owner_thread_index;
+ ti[0] = vnet_buffer (b[0])->ip.reass.owner_thread_index;
if (PREDICT_FALSE
((node->flags & VLIB_NODE_FLAG_TRACE)
--- /dev/null
+/*
+ * 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:
+ */
--- /dev/null
+/*
+ * 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.
+ */
+
+#ifndef __included_ip6_sv_reass_h__
+#define __included_ip6_sv_reass_h__
+
+#include <vnet/api_errno.h>
+#include <vnet/vnet.h>
+
+/**
+ * @brief set ip6 reassembly configuration
+ */
+vnet_api_error_t ip6_sv_reass_set (u32 timeout_ms, u32 max_reassemblies,
+ u32 max_reassembly_length,
+ u32 expire_walk_interval_ms);
+
+/**
+ * @brief get ip6 reassembly configuration
+ */
+vnet_api_error_t ip6_sv_reass_get (u32 * timeout_ms, u32 * max_reassemblies,
+ u32 * max_reassembly_length,
+ u32 * expire_walk_interval_ms);
+
+vnet_api_error_t ip6_sv_reass_enable_disable (u32 sw_if_index,
+ u8 enable_disable);
+
+int ip6_sv_reass_enable_disable_with_refcnt (u32 sw_if_index, int is_enable);
+
+#endif /* __included_ip6_sv_reass_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
from scapy.layers.l2 import Ether, GRE
from scapy.layers.inet import IP, UDP, ICMP
from scapy.layers.inet6 import HBHOptUnknown, ICMPv6ParamProblem,\
- ICMPv6TimeExceeded, IPv6, IPv6ExtHdrFragment, IPv6ExtHdrHopByHop
+ ICMPv6TimeExceeded, IPv6, IPv6ExtHdrFragment, IPv6ExtHdrHopByHop
from framework import VppTestCase, VppTestRunner
from util import ppp, ppc, fragment_rfc791, fragment_rfc8200
from vpp_gre_interface import VppGreInterface
self.src_if.assert_nothing_captured()
+class TestIPv4SVReassembly(VppTestCase):
+ """ IPv4 Shallow Virtual Reassembly """
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestIPv4SVReassembly, cls).setUpClass()
+
+ cls.create_pg_interfaces([0, 1])
+ cls.src_if = cls.pg0
+ cls.dst_if = cls.pg1
+
+ # setup all interfaces
+ for i in cls.pg_interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.resolve_arp()
+
+ def setUp(self):
+ """ Test setup - force timeout on existing reassemblies """
+ super(TestIPv4SVReassembly, self).setUp()
+ self.vapi.ip_reassembly_enable_disable(
+ sw_if_index=self.src_if.sw_if_index, enable_ip4=True,
+ type=VppEnum.vl_api_ip_reass_type_t.IP_REASS_TYPE_SHALLOW_VIRTUAL)
+ self.vapi.ip_reassembly_set(
+ timeout_ms=0, max_reassemblies=1000,
+ max_reassembly_length=1000,
+ type=VppEnum.vl_api_ip_reass_type_t.IP_REASS_TYPE_SHALLOW_VIRTUAL,
+ expire_walk_interval_ms=10)
+ self.sleep(.25)
+ self.vapi.ip_reassembly_set(
+ timeout_ms=1000000, max_reassemblies=1000,
+ max_reassembly_length=1000,
+ type=VppEnum.vl_api_ip_reass_type_t.IP_REASS_TYPE_SHALLOW_VIRTUAL,
+ expire_walk_interval_ms=10000)
+
+ def tearDown(self):
+ super(TestIPv4SVReassembly, self).tearDown()
+ self.logger.debug(self.vapi.ppcli("show ip4-sv-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+
+ def test_basic(self):
+ """ basic reassembly """
+ payload_len = 1000
+ payload = ""
+ counter = 0
+ while len(payload) < payload_len:
+ payload += "%u " % counter
+ counter += 1
+
+ p = (Ether(dst=self.src_if.local_mac, src=self.src_if.remote_mac) /
+ IP(id=1, src=self.src_if.remote_ip4,
+ dst=self.dst_if.remote_ip4) /
+ UDP(sport=1234, dport=5678) /
+ Raw(payload))
+ fragments = fragment_rfc791(p, payload_len/4)
+
+ # send fragment #2 - should be cached inside reassembly
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments[1])
+ self.pg_start()
+ self.logger.debug(self.vapi.ppcli("show ip4-sv-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+ self.logger.debug(self.vapi.ppcli("show trace"))
+ self.dst_if.assert_nothing_captured()
+
+ # send fragment #1 - reassembly is finished now and both fragments
+ # forwarded
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments[0])
+ self.pg_start()
+ self.logger.debug(self.vapi.ppcli("show ip4-sv-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+ self.logger.debug(self.vapi.ppcli("show trace"))
+ c = self.dst_if.get_capture(2)
+ for sent, recvd in zip([fragments[1], fragments[0]], c):
+ self.assertEqual(sent[IP].src, recvd[IP].src)
+ self.assertEqual(sent[IP].dst, recvd[IP].dst)
+ self.assertEqual(sent[Raw].payload, recvd[Raw].payload)
+
+ # send rest of fragments - should be immediately forwarded
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments[2:])
+ self.pg_start()
+ c = self.dst_if.get_capture(len(fragments[2:]))
+ for sent, recvd in zip(fragments[2:], c):
+ self.assertEqual(sent[IP].src, recvd[IP].src)
+ self.assertEqual(sent[IP].dst, recvd[IP].dst)
+ self.assertEqual(sent[Raw].payload, recvd[Raw].payload)
+
+ def test_timeout(self):
+ """ reassembly timeout """
+ payload_len = 1000
+ payload = ""
+ counter = 0
+ while len(payload) < payload_len:
+ payload += "%u " % counter
+ counter += 1
+
+ p = (Ether(dst=self.src_if.local_mac, src=self.src_if.remote_mac) /
+ IP(id=1, src=self.src_if.remote_ip4,
+ dst=self.dst_if.remote_ip4) /
+ UDP(sport=1234, dport=5678) /
+ Raw(payload))
+ fragments = fragment_rfc791(p, payload_len/4)
+
+ self.vapi.ip_reassembly_set(
+ timeout_ms=100, max_reassemblies=1000,
+ max_reassembly_length=1000,
+ expire_walk_interval_ms=50,
+ type=VppEnum.vl_api_ip_reass_type_t.IP_REASS_TYPE_SHALLOW_VIRTUAL)
+
+ # send fragments #2 and #1 - should be forwarded
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments[0:2])
+ self.pg_start()
+ self.logger.debug(self.vapi.ppcli("show ip4-sv-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+ self.logger.debug(self.vapi.ppcli("show trace"))
+ c = self.dst_if.get_capture(2)
+ for sent, recvd in zip([fragments[1], fragments[0]], c):
+ self.assertEqual(sent[IP].src, recvd[IP].src)
+ self.assertEqual(sent[IP].dst, recvd[IP].dst)
+ self.assertEqual(sent[Raw].payload, recvd[Raw].payload)
+
+ # wait for cleanup
+ self.sleep(.25, "wait before sending rest of fragments")
+
+ # send rest of fragments - shouldn't be forwarded
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments[2:])
+ self.pg_start()
+ self.dst_if.assert_nothing_captured()
+
+ def test_lru(self):
+ """ reassembly reuses LRU element """
+
+ self.vapi.ip_reassembly_set(
+ timeout_ms=1000000, max_reassemblies=1,
+ max_reassembly_length=1000,
+ type=VppEnum.vl_api_ip_reass_type_t.IP_REASS_TYPE_SHALLOW_VIRTUAL,
+ expire_walk_interval_ms=10000)
+
+ payload_len = 1000
+ payload = ""
+ counter = 0
+ while len(payload) < payload_len:
+ payload += "%u " % counter
+ counter += 1
+
+ packet_count = 10
+
+ fragments = [f
+ for i in range(packet_count)
+ for p in (Ether(dst=self.src_if.local_mac,
+ src=self.src_if.remote_mac) /
+ IP(id=i, src=self.src_if.remote_ip4,
+ dst=self.dst_if.remote_ip4) /
+ UDP(sport=1234, dport=5678) /
+ Raw(payload))
+ for f in fragment_rfc791(p, payload_len/4)]
+
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments)
+ self.pg_start()
+ c = self.dst_if.get_capture(len(fragments))
+ for sent, recvd in zip(fragments, c):
+ self.assertEqual(sent[IP].src, recvd[IP].src)
+ self.assertEqual(sent[IP].dst, recvd[IP].dst)
+ self.assertEqual(sent[Raw].payload, recvd[Raw].payload)
+
+
class TestIPv4MWReassembly(VppTestCase):
""" IPv4 Reassembly (multiple workers) """
worker_config = "workers %d" % worker_count
send_if.assert_nothing_captured()
+class TestIPv6SVReassembly(VppTestCase):
+ """ IPv6 Shallow Virtual Reassembly """
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestIPv6SVReassembly, cls).setUpClass()
+
+ cls.create_pg_interfaces([0, 1])
+ cls.src_if = cls.pg0
+ cls.dst_if = cls.pg1
+
+ # setup all interfaces
+ for i in cls.pg_interfaces:
+ i.admin_up()
+ i.config_ip6()
+ i.resolve_ndp()
+
+ def setUp(self):
+ """ Test setup - force timeout on existing reassemblies """
+ super(TestIPv6SVReassembly, self).setUp()
+ self.vapi.ip_reassembly_enable_disable(
+ sw_if_index=self.src_if.sw_if_index, enable_ip6=True,
+ type=VppEnum.vl_api_ip_reass_type_t.IP_REASS_TYPE_SHALLOW_VIRTUAL)
+ self.vapi.ip_reassembly_set(
+ timeout_ms=0, max_reassemblies=1000,
+ max_reassembly_length=1000,
+ type=VppEnum.vl_api_ip_reass_type_t.IP_REASS_TYPE_SHALLOW_VIRTUAL,
+ expire_walk_interval_ms=10, is_ip6=1)
+ self.sleep(.25)
+ self.vapi.ip_reassembly_set(
+ timeout_ms=1000000, max_reassemblies=1000,
+ max_reassembly_length=1000,
+ type=VppEnum.vl_api_ip_reass_type_t.IP_REASS_TYPE_SHALLOW_VIRTUAL,
+ expire_walk_interval_ms=10000, is_ip6=1)
+
+ def tearDown(self):
+ super(TestIPv6SVReassembly, self).tearDown()
+ self.logger.debug(self.vapi.ppcli("show ip6-sv-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+
+ def test_basic(self):
+ """ basic reassembly """
+ payload_len = 1000
+ payload = ""
+ counter = 0
+ while len(payload) < payload_len:
+ payload += "%u " % counter
+ counter += 1
+
+ p = (Ether(dst=self.src_if.local_mac, src=self.src_if.remote_mac) /
+ IPv6(src=self.src_if.remote_ip6, dst=self.dst_if.remote_ip6) /
+ UDP(sport=1234, dport=5678) /
+ Raw(payload))
+ fragments = fragment_rfc8200(p, 1, payload_len/4)
+
+ # send fragment #2 - should be cached inside reassembly
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments[1])
+ self.pg_start()
+ self.logger.debug(self.vapi.ppcli("show ip6-sv-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+ self.logger.debug(self.vapi.ppcli("show trace"))
+ self.dst_if.assert_nothing_captured()
+
+ # send fragment #1 - reassembly is finished now and both fragments
+ # forwarded
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments[0])
+ self.pg_start()
+ self.logger.debug(self.vapi.ppcli("show ip6-sv-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+ self.logger.debug(self.vapi.ppcli("show trace"))
+ c = self.dst_if.get_capture(2)
+ for sent, recvd in zip([fragments[1], fragments[0]], c):
+ self.assertEqual(sent[IPv6].src, recvd[IPv6].src)
+ self.assertEqual(sent[IPv6].dst, recvd[IPv6].dst)
+ self.assertEqual(sent[Raw].payload, recvd[Raw].payload)
+
+ # send rest of fragments - should be immediately forwarded
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments[2:])
+ self.pg_start()
+ c = self.dst_if.get_capture(len(fragments[2:]))
+ for sent, recvd in zip(fragments[2:], c):
+ self.assertEqual(sent[IPv6].src, recvd[IPv6].src)
+ self.assertEqual(sent[IPv6].dst, recvd[IPv6].dst)
+ self.assertEqual(sent[Raw].payload, recvd[Raw].payload)
+
+ def test_timeout(self):
+ """ reassembly timeout """
+ payload_len = 1000
+ payload = ""
+ counter = 0
+ while len(payload) < payload_len:
+ payload += "%u " % counter
+ counter += 1
+
+ p = (Ether(dst=self.src_if.local_mac, src=self.src_if.remote_mac) /
+ IPv6(src=self.src_if.remote_ip6, dst=self.dst_if.remote_ip6) /
+ UDP(sport=1234, dport=5678) /
+ Raw(payload))
+ fragments = fragment_rfc8200(p, 1, payload_len/4)
+
+ self.vapi.ip_reassembly_set(
+ timeout_ms=100, max_reassemblies=1000,
+ max_reassembly_length=1000,
+ expire_walk_interval_ms=50,
+ is_ip6=1,
+ type=VppEnum.vl_api_ip_reass_type_t.IP_REASS_TYPE_SHALLOW_VIRTUAL)
+
+ # send fragments #2 and #1 - should be forwarded
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments[0:2])
+ self.pg_start()
+ self.logger.debug(self.vapi.ppcli("show ip4-sv-reassembly details"))
+ self.logger.debug(self.vapi.ppcli("show buffers"))
+ self.logger.debug(self.vapi.ppcli("show trace"))
+ c = self.dst_if.get_capture(2)
+ for sent, recvd in zip([fragments[1], fragments[0]], c):
+ self.assertEqual(sent[IPv6].src, recvd[IPv6].src)
+ self.assertEqual(sent[IPv6].dst, recvd[IPv6].dst)
+ self.assertEqual(sent[Raw].payload, recvd[Raw].payload)
+
+ # wait for cleanup
+ self.sleep(.25, "wait before sending rest of fragments")
+
+ # send rest of fragments - shouldn't be forwarded
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments[2:])
+ self.pg_start()
+ self.dst_if.assert_nothing_captured()
+
+ def test_lru(self):
+ """ reassembly reuses LRU element """
+
+ self.vapi.ip_reassembly_set(
+ timeout_ms=1000000, max_reassemblies=1,
+ max_reassembly_length=1000,
+ type=VppEnum.vl_api_ip_reass_type_t.IP_REASS_TYPE_SHALLOW_VIRTUAL,
+ is_ip6=1, expire_walk_interval_ms=10000)
+
+ payload_len = 1000
+ payload = ""
+ counter = 0
+ while len(payload) < payload_len:
+ payload += "%u " % counter
+ counter += 1
+
+ packet_count = 10
+
+ fragments = [f
+ for i in range(packet_count)
+ for p in (Ether(dst=self.src_if.local_mac,
+ src=self.src_if.remote_mac) /
+ IPv6(src=self.src_if.remote_ip6,
+ dst=self.dst_if.remote_ip6) /
+ UDP(sport=1234, dport=5678) /
+ Raw(payload))
+ for f in fragment_rfc8200(p, i, payload_len/4)]
+
+ self.pg_enable_capture()
+ self.src_if.add_stream(fragments)
+ self.pg_start()
+ c = self.dst_if.get_capture(len(fragments))
+ for sent, recvd in zip(fragments, c):
+ self.assertEqual(sent[IPv6].src, recvd[IPv6].src)
+ self.assertEqual(sent[IPv6].dst, recvd[IPv6].dst)
+ self.assertEqual(sent[Raw].payload, recvd[Raw].payload)
+
+
class TestIPv4ReassemblyLocalNode(VppTestCase):
""" IPv4 Reassembly for packets coming to ip4-local node """
Code Review / vpp.git / commitdiff