#include <vnet/ip/ip6_inlines.h>
#define MSEC_PER_SEC 1000
-#define IP6_FULL_REASS_TIMEOUT_DEFAULT_MS 100
-#define IP6_FULL_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS 10000 // 10 seconds default
+#define IP6_FULL_REASS_TIMEOUT_DEFAULT_MS 200
+/* As there are only 1024 reass context per thread, either the DDOS attacks
+ * or fractions of real timeouts, would consume these contexts quickly and
+ * running out context space and unable to perform reassembly */
+#define IP6_FULL_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS 50 // 50 ms default
#define IP6_FULL_REASS_MAX_REASSEMBLIES_DEFAULT 1024
#define IP6_FULL_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT 3
#define IP6_FULL_REASS_HT_LOAD_FACTOR (0.75)
IP6_FULL_REASS_RC_TOO_MANY_FRAGMENTS,
IP6_FULL_REASS_RC_NO_BUF,
IP6_FULL_REASS_RC_HANDOFF,
+ IP6_FULL_REASS_RC_INVALID_FRAG_LEN,
+ IP6_FULL_REASS_RC_OVERLAP,
} ip6_full_reass_rc_t;
typedef struct
ip6_full_reass_t *pool;
u32 reass_n;
u32 id_counter;
+ // for pacing the main thread timeouts
+ u32 last_id;
clib_spinlock_t lock;
} ip6_full_reass_per_thread_t;
// convenience
vlib_main_t *vlib_main;
- // node index of ip6-drop node
- u32 ip6_drop_idx;
u32 ip6_icmp_error_idx;
u32 ip6_full_reass_expire_node_idx;
/** Worker handoff */
u32 fq_index;
+ u32 fq_local_index;
u32 fq_feature_index;
+ u32 fq_custom_index;
// reference count for enabling/disabling feature - per interface
u32 *feature_use_refcount_per_intf;
+
+ // whether local fragmented packets are reassembled or not
+ int is_local_reass_enabled;
} ip6_full_reass_main_t;
extern ip6_full_reass_main_t ip6_full_reass_main;
IP6_FULL_REASSEMBLY_N_NEXT,
} ip6_full_reass_next_t;
+typedef enum
+{
+ NORMAL,
+ FEATURE,
+ CUSTOM
+} ip6_full_reass_node_type_t;
+
typedef enum
{
RANGE_NEW,
+ RANGE_DISCARD,
RANGE_OVERLAP,
ICMP_ERROR_RT_EXCEEDED,
ICMP_ERROR_FL_TOO_BIG,
ICMP_ERROR_FL_NOT_MULT_8,
FINALIZE,
HANDOFF,
+ PASSTHROUGH,
} ip6_full_reass_trace_operation_e;
typedef struct
s = format (s, "\n%Unew %U", format_white_space, indent,
format_ip6_full_reass_range_trace, &t->trace_range);
break;
+ case RANGE_DISCARD:
+ s = format (s, "\n%Udiscard %U", format_white_space, indent,
+ format_ip6_full_reass_range_trace, &t->trace_range);
+ break;
case RANGE_OVERLAP:
s = format (s, "\n%Uoverlap %U", format_white_space, indent,
format_ip6_full_reass_range_trace, &t->trace_range);
format (s, "handoff from thread #%u to thread #%u", t->thread_id,
t->thread_id_to);
break;
+ case PASSTHROUGH:
+ s = format (s, "passthrough - not a fragment");
+ break;
}
return s;
}
ip6_full_reass_free_ctx (rt, reass);
}
+/* n_left_to_next, and to_next are taken as input params, as this function
+ * could be called from a graphnode, where its managing local copy of these
+ * variables, and ignoring those and still trying to enqueue the buffers
+ * with local variables would cause either buffer leak or corruption */
always_inline void
ip6_full_reass_drop_all (vlib_main_t *vm, vlib_node_runtime_t *node,
- ip6_full_reass_t *reass)
+ ip6_full_reass_t *reass, u32 *n_left_to_next,
+ u32 **to_next)
{
u32 range_bi = reass->first_bi;
vlib_buffer_t *range_b;
vnet_buffer_opaque_t *range_vnb;
u32 *to_free = NULL;
+
while (~0 != range_bi)
{
range_b = vlib_get_buffer (vm, range_bi);
range_vnb = vnet_buffer (range_b);
- u32 bi = range_bi;
- while (~0 != bi)
+
+ if (~0 != range_bi)
{
- vec_add1 (to_free, bi);
- vlib_buffer_t *b = vlib_get_buffer (vm, bi);
- if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
- {
- bi = b->next_buffer;
- b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
- }
- else
- {
- bi = ~0;
- }
+ vec_add1 (to_free, range_bi);
}
range_bi = range_vnb->ip.reass.next_range_bi;
}
+
/* send to next_error_index */
- if (~0 != reass->error_next_index)
+ if (~0 != reass->error_next_index &&
+ reass->error_next_index < node->n_next_nodes)
{
- u32 n_left_to_next, *to_next, next_index;
+ u32 next_index;
next_index = reass->error_next_index;
u32 bi = ~0;
+ /* record number of packets sent to custom app */
+ vlib_node_increment_counter (vm, node->node_index,
+ IP6_ERROR_REASS_TO_CUSTOM_APP,
+ vec_len (to_free));
+
while (vec_len (to_free) > 0)
{
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ vlib_get_next_frame (vm, node, next_index, *to_next,
+ (*n_left_to_next));
- while (vec_len (to_free) > 0 && n_left_to_next > 0)
+ while (vec_len (to_free) > 0 && (*n_left_to_next) > 0)
{
bi = vec_pop (to_free);
if (~0 != bi)
{
- to_next[0] = bi;
- to_next += 1;
- n_left_to_next -= 1;
+ vlib_buffer_t *b = vlib_get_buffer (vm, bi);
+ if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ ip6_full_reass_add_trace (vm, node, reass, bi, NULL,
+ RANGE_DISCARD, ~0);
+ }
+ *to_next[0] = bi;
+ (*to_next) += 1;
+ (*n_left_to_next) -= 1;
}
}
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ vlib_put_next_frame (vm, node, next_index, (*n_left_to_next));
}
}
else
}
always_inline void
-ip6_full_reass_on_timeout (vlib_main_t * vm, vlib_node_runtime_t * node,
- ip6_full_reass_t * reass, u32 * icmp_bi)
+sanitize_reass_buffers_add_missing (vlib_main_t *vm, ip6_full_reass_t *reass,
+ u32 *bi0)
+{
+ u32 range_bi = reass->first_bi;
+ vlib_buffer_t *range_b;
+ vnet_buffer_opaque_t *range_vnb;
+
+ while (~0 != range_bi)
+ {
+ range_b = vlib_get_buffer (vm, range_bi);
+ range_vnb = vnet_buffer (range_b);
+ u32 bi = range_bi;
+ if (~0 != bi)
+ {
+ if (bi == *bi0)
+ *bi0 = ~0;
+ if (range_b->flags & VLIB_BUFFER_NEXT_PRESENT)
+ {
+ u32 _bi = bi;
+ vlib_buffer_t *_b = vlib_get_buffer (vm, _bi);
+ while (_b->flags & VLIB_BUFFER_NEXT_PRESENT)
+ {
+ if (_b->next_buffer != range_vnb->ip.reass.next_range_bi)
+ {
+ _bi = _b->next_buffer;
+ _b = vlib_get_buffer (vm, _bi);
+ }
+ else
+ {
+ _b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
+ break;
+ }
+ }
+ }
+ range_bi = range_vnb->ip.reass.next_range_bi;
+ }
+ }
+ if (*bi0 != ~0)
+ {
+ vlib_buffer_t *fb = vlib_get_buffer (vm, *bi0);
+ vnet_buffer_opaque_t *fvnb = vnet_buffer (fb);
+ if (~0 != reass->first_bi)
+ {
+ fvnb->ip.reass.next_range_bi = reass->first_bi;
+ reass->first_bi = *bi0;
+ }
+ else
+ {
+ reass->first_bi = *bi0;
+ fvnb->ip.reass.next_range_bi = ~0;
+ }
+ *bi0 = ~0;
+ }
+}
+
+always_inline void
+ip6_full_reass_on_timeout (vlib_main_t *vm, vlib_node_runtime_t *node,
+ ip6_full_reass_t *reass, u32 *icmp_bi,
+ u32 *n_left_to_next, u32 **to_next)
{
if (~0 == reass->first_bi)
{
0);
}
}
- ip6_full_reass_drop_all (vm, node, reass);
+ ip6_full_reass_drop_all (vm, node, reass, n_left_to_next, to_next);
}
always_inline ip6_full_reass_t *
-ip6_full_reass_find_or_create (vlib_main_t * vm, vlib_node_runtime_t * node,
- ip6_full_reass_main_t * rm,
- ip6_full_reass_per_thread_t * rt,
- ip6_full_reass_kv_t * kv, u32 * icmp_bi,
- u8 * do_handoff)
+ip6_full_reass_find_or_create (vlib_main_t *vm, vlib_node_runtime_t *node,
+ ip6_full_reass_main_t *rm,
+ ip6_full_reass_per_thread_t *rt,
+ ip6_full_reass_kv_t *kv, u32 *icmp_bi,
+ u8 *do_handoff, int skip_bihash,
+ u32 *n_left_to_next, u32 **to_next)
{
ip6_full_reass_t *reass;
f64 now;
reass = NULL;
now = vlib_time_now (vm);
- if (!clib_bihash_search_48_8 (&rm->hash, &kv->kv, &kv->kv))
+ if (!skip_bihash && !clib_bihash_search_48_8 (&rm->hash, &kv->kv, &kv->kv))
{
if (vm->thread_index != kv->v.memory_owner_thread_index)
{
if (now > reass->last_heard + rm->timeout)
{
- ip6_full_reass_on_timeout (vm, node, reass, icmp_bi);
+ vlib_node_increment_counter (vm, node->node_index,
+ IP6_ERROR_REASS_TIMEOUT, 1);
+ ip6_full_reass_on_timeout (vm, node, reass, icmp_bi, n_left_to_next,
+ to_next);
ip6_full_reass_free (rm, rt, reass);
reass = NULL;
}
reass->data_len = 0;
reass->next_index = ~0;
reass->error_next_index = ~0;
+ reass->memory_owner_thread_index = vm->thread_index;
++rt->reass_n;
}
- reass->key.as_u64[0] = kv->kv.key[0];
- reass->key.as_u64[1] = kv->kv.key[1];
- reass->key.as_u64[2] = kv->kv.key[2];
- reass->key.as_u64[3] = kv->kv.key[3];
- reass->key.as_u64[4] = kv->kv.key[4];
- reass->key.as_u64[5] = kv->kv.key[5];
kv->v.reass_index = (reass - rt->pool);
kv->v.memory_owner_thread_index = vm->thread_index;
reass->last_heard = now;
- int rv = clib_bihash_add_del_48_8 (&rm->hash, &kv->kv, 2);
- if (rv)
+ if (!skip_bihash)
{
- ip6_full_reass_free (rm, rt, reass);
- reass = NULL;
- // if other worker created a context already work with the other copy
- if (-2 == rv)
- goto again;
+ reass->key.as_u64[0] = kv->kv.key[0];
+ reass->key.as_u64[1] = kv->kv.key[1];
+ reass->key.as_u64[2] = kv->kv.key[2];
+ reass->key.as_u64[3] = kv->kv.key[3];
+ reass->key.as_u64[4] = kv->kv.key[4];
+ reass->key.as_u64[5] = kv->kv.key[5];
+
+ int rv = clib_bihash_add_del_48_8 (&rm->hash, &kv->kv, 2);
+ if (rv)
+ {
+ ip6_full_reass_free (rm, rt, reass);
+ reass = NULL;
+ // if other worker created a context already work with the other copy
+ if (-2 == rv)
+ goto again;
+ }
+ }
+ else
+ {
+ reass->key.as_u64[0] = ~0;
+ reass->key.as_u64[1] = ~0;
+ reass->key.as_u64[2] = ~0;
+ reass->key.as_u64[3] = ~0;
+ reass->key.as_u64[4] = ~0;
+ reass->key.as_u64[5] = ~0;
}
return reass;
vlib_buffer_t *last_b = NULL;
u32 sub_chain_bi = reass->first_bi;
u32 total_length = 0;
- u32 buf_cnt = 0;
- u32 dropped_cnt = 0;
u32 *vec_drop_compress = NULL;
ip6_full_reass_rc_t rv = IP6_FULL_REASS_RC_OK;
do
vlib_buffer_length_in_chain (vm, tmp) - trim_front - trim_end;
while (1)
{
- ++buf_cnt;
if (trim_front)
{
if (trim_front > tmp->current_length)
{
/* drop whole buffer */
- vec_add1 (vec_drop_compress, tmp_bi);
- trim_front -= tmp->current_length;
if (!(tmp->flags & VLIB_BUFFER_NEXT_PRESENT))
{
rv = IP6_FULL_REASS_RC_INTERNAL_ERROR;
goto free_buffers_and_return;
}
+ trim_front -= tmp->current_length;
+ vec_add1 (vec_drop_compress, tmp_bi);
tmp->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
tmp_bi = tmp->next_buffer;
tmp = vlib_get_buffer (vm, tmp_bi);
}
else
{
- vec_add1 (vec_drop_compress, tmp_bi);
if (reass->first_bi == tmp_bi)
{
rv = IP6_FULL_REASS_RC_INTERNAL_ERROR;
goto free_buffers_and_return;
}
- ++dropped_cnt;
+ vec_add1 (vec_drop_compress, tmp_bi);
}
if (tmp->flags & VLIB_BUFFER_NEXT_PRESENT)
{
*next0 = reass->next_index;
}
vnet_buffer (first_b)->ip.reass.estimated_mtu = reass->min_fragment_length;
+ /* Keep track of number of successfully reassembled packets and number of
+ * fragments reassembled */
+ vlib_node_increment_counter (vm, node->node_index, IP6_ERROR_REASS_SUCCESS,
+ 1);
+
+ vlib_node_increment_counter (vm, node->node_index,
+ IP6_ERROR_REASS_FRAGMENTS_REASSEMBLED,
+ reass->fragments_n);
+
ip6_full_reass_free (rm, rt, reass);
reass = NULL;
free_buffers_and_return:
}
always_inline ip6_full_reass_rc_t
-ip6_full_reass_update (vlib_main_t * vm, vlib_node_runtime_t * node,
- ip6_full_reass_main_t * rm,
- ip6_full_reass_per_thread_t * rt,
- ip6_full_reass_t * reass, u32 * bi0, u32 * next0,
- u32 * error0, ip6_frag_hdr_t * frag_hdr,
- bool is_custom_app, u32 * handoff_thread_idx)
+ip6_full_reass_update (vlib_main_t *vm, vlib_node_runtime_t *node,
+ ip6_full_reass_main_t *rm,
+ ip6_full_reass_per_thread_t *rt,
+ ip6_full_reass_t *reass, u32 *bi0, u32 *next0,
+ u32 *error0, ip6_frag_hdr_t *frag_hdr,
+ bool is_custom_app, u32 *handoff_thread_idx,
+ int skip_bihash)
{
int consumed = 0;
vlib_buffer_t *fb = vlib_get_buffer (vm, *bi0);
u32 fragment_length =
vlib_buffer_length_in_chain (vm, fb) -
(fvnb->ip.reass.ip6_frag_hdr_offset + sizeof (*frag_hdr));
+ if (0 == fragment_length)
+ {
+ return IP6_FULL_REASS_RC_INVALID_FRAG_LEN;
+ }
u32 fragment_last = fvnb->ip.reass.fragment_last =
fragment_first + fragment_length - 1;
int more_fragments = ip6_frag_hdr_more (frag_hdr);
ip6_full_reass_add_trace (vm, node, reass, *bi0, frag_hdr,
RANGE_OVERLAP, ~0);
}
- ip6_full_reass_drop_all (vm, node, reass);
- ip6_full_reass_free (rm, rt, reass);
- *next0 = IP6_FULL_REASSEMBLY_NEXT_DROP;
- *error0 = IP6_ERROR_REASS_OVERLAPPING_FRAGMENT;
- return IP6_FULL_REASS_RC_OK;
+ return IP6_FULL_REASS_RC_OVERLAP;
}
break;
}
~0);
}
}
+ else if (skip_bihash)
+ {
+ // if this reassembly is not in bihash, then the packet must have been
+ // consumed
+ return IP6_FULL_REASS_RC_INTERNAL_ERROR;
+ }
if (~0 != reass->last_packet_octet &&
reass->data_len == reass->last_packet_octet + 1)
{
}
else
{
+ if (skip_bihash)
+ {
+ // if this reassembly is not in bihash, it should've been an atomic
+ // fragment and thus finalized
+ return IP6_FULL_REASS_RC_INTERNAL_ERROR;
+ }
if (consumed)
{
*bi0 = ~0;
}
always_inline bool
-ip6_full_reass_verify_fragment_multiple_8 (vlib_main_t * vm,
- vlib_buffer_t * b,
- ip6_frag_hdr_t * frag_hdr)
+ip6_full_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);
icmp6_error_set_vnet_buffer (b, ICMP6_parameter_problem,
ICMP6_parameter_problem_erroneous_header_field,
(u8 *) & ip->payload_length - (u8 *) ip);
+ b->error = node->errors[IP6_ERROR_REASS_INVALID_FRAG_SIZE];
return false;
}
return true;
}
always_inline bool
-ip6_full_reass_verify_packet_size_lt_64k (vlib_main_t * vm,
- vlib_buffer_t * b,
- ip6_frag_hdr_t * frag_hdr)
+ip6_full_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);
ICMP6_parameter_problem_erroneous_header_field,
(u8 *) & frag_hdr->fragment_offset_and_more
- (u8 *) ip0);
+ b->error = node->errors[IP6_ERROR_REASS_INVALID_FRAG_SIZE];
return false;
}
return true;
}
always_inline uword
-ip6_full_reassembly_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame, bool is_feature,
- bool is_custom_app)
+ip6_full_reassembly_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_frame_t *frame, bool is_feature,
+ bool is_custom_app, bool is_local)
{
u32 *from = vlib_frame_vector_args (frame);
u32 n_left_from, n_left_to_next, *to_next, next_index;
b0 = vlib_get_buffer (vm, bi0);
ip6_header_t *ip0 = vlib_buffer_get_current (b0);
- ip6_frag_hdr_t *frag_hdr;
+ ip6_frag_hdr_t *frag_hdr = NULL;
ip6_ext_hdr_chain_t hdr_chain;
+ vnet_buffer_opaque_t *fvnb = vnet_buffer (b0);
+
int res = ip6_ext_header_walk (
b0, ip0, IP_PROTOCOL_IPV6_FRAGMENTATION, &hdr_chain);
if (res < 0 ||
hdr_chain.eh[res].protocol != IP_PROTOCOL_IPV6_FRAGMENTATION)
{
+ vlib_node_increment_counter (vm, node->node_index,
+ IP6_ERROR_REASS_NO_FRAG_HDR, 1);
// this is a mangled packet - no fragmentation
+ next0 = is_custom_app ? fvnb->ip.reass.error_next_index :
+ IP6_FULL_REASSEMBLY_NEXT_DROP;
+ ip6_full_reass_add_trace (vm, node, NULL, bi0, NULL, PASSTHROUGH,
+ ~0);
+ goto skip_reass;
+ }
+ if (is_local && !rm->is_local_reass_enabled)
+ {
next0 = IP6_FULL_REASSEMBLY_NEXT_DROP;
goto skip_reass;
}
+
+ /* Keep track of received fragments */
+ vlib_node_increment_counter (vm, node->node_index,
+ IP6_ERROR_REASS_FRAGMENTS_RCVD, 1);
frag_hdr =
ip6_ext_next_header_offset (ip0, hdr_chain.eh[res].offset);
vnet_buffer (b0)->ip.reass.ip6_frag_hdr_offset =
if (!ip6_full_reass_verify_upper_layer_present (node, b0,
&hdr_chain))
{
- next0 = IP6_FULL_REASSEMBLY_NEXT_ICMP_ERROR;
+ next0 = is_custom_app ? fvnb->ip.reass.error_next_index :
+ IP6_FULL_REASSEMBLY_NEXT_ICMP_ERROR;
goto skip_reass;
}
}
- if (!ip6_full_reass_verify_fragment_multiple_8 (vm, b0, frag_hdr) ||
- !ip6_full_reass_verify_packet_size_lt_64k (vm, b0, frag_hdr))
+
+ if (!ip6_full_reass_verify_fragment_multiple_8 (vm, node, b0,
+ frag_hdr) ||
+ !ip6_full_reass_verify_packet_size_lt_64k (vm, node, b0,
+ frag_hdr))
{
- next0 = IP6_FULL_REASSEMBLY_NEXT_ICMP_ERROR;
+ next0 = is_custom_app ? fvnb->ip.reass.error_next_index :
+ IP6_FULL_REASSEMBLY_NEXT_ICMP_ERROR;
goto skip_reass;
}
+
+ int skip_bihash = 0;
ip6_full_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;
+ if (0 == ip6_frag_hdr_offset (frag_hdr) &&
+ !ip6_frag_hdr_more (frag_hdr))
+ {
+ // this is atomic fragment and needs to be processed separately
+ skip_bihash = 1;
+ }
+ else
+ {
+ 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;
+ /* RFC 8200: The Next Header values in the Fragment headers of
+ * different fragments of the same original packet may differ.
+ * Only the value from the Offset zero fragment packet is used
+ * for reassembly.
+ *
+ * Also, IPv6 Header doesnt contain the protocol value unlike
+ * IPv4.*/
+ kv.k.as_u64[5] = 0;
+ }
- ip6_full_reass_t *reass =
- ip6_full_reass_find_or_create (vm, node, rm, rt, &kv, &icmp_bi,
- &do_handoff);
+ ip6_full_reass_t *reass = ip6_full_reass_find_or_create (
+ vm, node, rm, rt, &kv, &icmp_bi, &do_handoff, skip_bihash,
+ &n_left_to_next, &to_next);
if (reass)
{
{
u32 handoff_thread_idx;
u32 counter = ~0;
- switch (ip6_full_reass_update
- (vm, node, rm, rt, reass, &bi0, &next0, &error0,
- frag_hdr, is_custom_app, &handoff_thread_idx))
+ switch (ip6_full_reass_update (
+ vm, node, rm, rt, reass, &bi0, &next0, &error0, frag_hdr,
+ is_custom_app, &handoff_thread_idx, skip_bihash))
{
case IP6_FULL_REASS_RC_OK:
/* nothing to do here */
case IP6_FULL_REASS_RC_NO_BUF:
counter = IP6_ERROR_REASS_NO_BUF;
break;
+ case IP6_FULL_REASS_RC_INVALID_FRAG_LEN:
+ counter = IP6_ERROR_REASS_INVALID_FRAG_LEN;
+ break;
+ case IP6_FULL_REASS_RC_OVERLAP:
+ counter = IP6_ERROR_REASS_OVERLAPPING_FRAGMENT;
+ break;
case IP6_FULL_REASS_RC_INTERNAL_ERROR:
counter = IP6_ERROR_REASS_INTERNAL_ERROR;
+ /* Sanitization is needed in internal error cases only, as
+ * the incoming packet is already dropped in other cases,
+ * also adding bi0 back to the reassembly list, fixes the
+ * leaking of buffers during internal errors.
+ *
+ * Also it doesnt make sense to send these buffers custom
+ * app, these fragments are with internal errors */
+ sanitize_reass_buffers_add_missing (vm, reass, &bi0);
+ reass->error_next_index = ~0;
break;
}
if (~0 != counter)
{
vlib_node_increment_counter (vm, node->node_index, counter,
1);
- ip6_full_reass_drop_all (vm, node, reass);
+ ip6_full_reass_drop_all (vm, node, reass, &n_left_to_next,
+ &to_next);
ip6_full_reass_free (rm, rt, reass);
goto next_packet;
+ break;
}
}
else
}
else
{
- vnet_buffer_opaque_t *fvnb = vnet_buffer (b0);
next0 = fvnb->ip.reass.error_next_index;
}
error0 = IP6_ERROR_REASS_LIMIT_REACHED;
{
vnet_feature_next (&next0, b0);
}
+
+ /* Increment the counter to-custom-app also as this fragment is
+ * also going to application */
+ if (is_custom_app)
+ {
+ vlib_node_increment_counter (
+ vm, node->node_index, IP6_ERROR_REASS_TO_CUSTOM_APP, 1);
+ }
+
vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
n_left_to_next, bi0, next0);
}
return frame->n_vectors;
}
-static char *ip6_full_reassembly_error_strings[] = {
-#define _(sym, string) string,
- foreach_ip6_error
-#undef _
-};
-
VLIB_NODE_FN (ip6_full_reass_node) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- return ip6_full_reassembly_inline (vm, node, frame, false /* is_feature */ ,
- false /* is_custom_app */ );
+ return ip6_full_reassembly_inline (vm, node, frame, false /* is_feature */,
+ false /* is_custom_app */,
+ false /* is_local */);
}
VLIB_REGISTER_NODE (ip6_full_reass_node) = {
.name = "ip6-full-reassembly",
.vector_size = sizeof (u32),
.format_trace = format_ip6_full_reass_trace,
- .n_errors = ARRAY_LEN (ip6_full_reassembly_error_strings),
- .error_strings = ip6_full_reassembly_error_strings,
+ .n_errors = IP6_N_ERROR,
+ .error_counters = ip6_error_counters,
.n_next_nodes = IP6_FULL_REASSEMBLY_N_NEXT,
.next_nodes =
{
},
};
+VLIB_NODE_FN (ip6_local_full_reass_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ return ip6_full_reassembly_inline (vm, node, frame, false /* is_feature */,
+ false /* is_custom_app */,
+ true /* is_local */);
+}
+
+VLIB_REGISTER_NODE (ip6_local_full_reass_node) = {
+ .name = "ip6-local-full-reassembly",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ip6_full_reass_trace,
+ .n_errors = IP6_N_ERROR,
+ .error_counters = ip6_error_counters,
+ .n_next_nodes = IP6_FULL_REASSEMBLY_N_NEXT,
+ .next_nodes =
+ {
+ [IP6_FULL_REASSEMBLY_NEXT_INPUT] = "ip6-input",
+ [IP6_FULL_REASSEMBLY_NEXT_DROP] = "ip6-drop",
+ [IP6_FULL_REASSEMBLY_NEXT_ICMP_ERROR] = "ip6-icmp-error",
+ [IP6_FULL_REASSEMBLY_NEXT_HANDOFF] = "ip6-local-full-reassembly-handoff",
+ },
+};
+
VLIB_NODE_FN (ip6_full_reass_node_feature) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- return ip6_full_reassembly_inline (vm, node, frame, true /* is_feature */ ,
- false /* is_custom_app */ );
+ return ip6_full_reassembly_inline (vm, node, frame, true /* is_feature */,
+ false /* is_custom_app */,
+ false /* is_local */);
}
VLIB_REGISTER_NODE (ip6_full_reass_node_feature) = {
.name = "ip6-full-reassembly-feature",
.vector_size = sizeof (u32),
.format_trace = format_ip6_full_reass_trace,
- .n_errors = ARRAY_LEN (ip6_full_reassembly_error_strings),
- .error_strings = ip6_full_reassembly_error_strings,
+ .n_errors = IP6_N_ERROR,
+ .error_counters = ip6_error_counters,
.n_next_nodes = IP6_FULL_REASSEMBLY_N_NEXT,
.next_nodes =
{
.runs_after = 0,
};
+VLIB_NODE_FN (ip6_full_reass_node_custom)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ return ip6_full_reassembly_inline (vm, node, frame, false /* is_feature */,
+ true /* is_custom_app */,
+ false /* is_local */);
+}
+
+VLIB_REGISTER_NODE (ip6_full_reass_node_custom) = {
+ .name = "ip6-full-reassembly-custom",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ip6_full_reass_trace,
+ .n_errors = IP6_N_ERROR,
+ .error_counters = ip6_error_counters,
+ .n_next_nodes = IP6_FULL_REASSEMBLY_N_NEXT,
+ .next_nodes =
+ {
+ [IP6_FULL_REASSEMBLY_NEXT_INPUT] = "ip6-input",
+ [IP6_FULL_REASSEMBLY_NEXT_DROP] = "ip6-drop",
+ [IP6_FULL_REASSEMBLY_NEXT_ICMP_ERROR] = "ip6-icmp-error",
+ [IP6_FULL_REASSEMBLY_NEXT_HANDOFF] = "ip6-full-reass-custom-hoff",
+ },
+};
+
#ifndef CLIB_MARCH_VARIANT
static u32
ip6_full_reass_get_nbuckets ()
u32 nbuckets;
u8 i;
- nbuckets = (u32) (rm->max_reass_n / IP6_FULL_REASS_HT_LOAD_FACTOR);
+ /* need more mem with more workers */
+ nbuckets = (u32) (rm->max_reass_n * (vlib_num_workers () + 1) /
+ IP6_FULL_REASS_HT_LOAD_FACTOR);
for (i = 0; i < 31; i++)
if ((1 << i) >= nbuckets)
clib_bihash_init_48_8 (&rm->hash, "ip6-full-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_full_reass_node.index);
+ ip6_local_full_reass_node.index);
+ rm->is_local_reass_enabled = 1;
rm->fq_index = vlib_frame_queue_main_init (ip6_full_reass_node.index, 0);
+ rm->fq_local_index =
+ vlib_frame_queue_main_init (ip6_local_full_reass_node.index, 0);
rm->fq_feature_index =
vlib_frame_queue_main_init (ip6_full_reass_node_feature.index, 0);
+ rm->fq_custom_index =
+ vlib_frame_queue_main_init (ip6_full_reass_node_custom.index, 0);
rm->feature_use_refcount_per_intf = NULL;
return error;
int index;
const uword nthreads = vlib_num_workers () + 1;
u32 *vec_icmp_bi = NULL;
+ u32 n_left_to_next, *to_next;
+
for (thread_index = 0; thread_index < nthreads; ++thread_index)
{
ip6_full_reass_per_thread_t *rt =
&rm->per_thread_data[thread_index];
+ u32 reass_timeout_cnt = 0;
clib_spinlock_lock (&rt->lock);
vec_reset_length (pool_indexes_to_free);
- 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);
- }
- }
+ /* Pace the number of timeouts handled per thread,to avoid barrier
+ * sync issues in real world scenarios */
+
+ u32 beg = rt->last_id;
+ /* to ensure we walk at least once per sec per context */
+ u32 end = beg + (IP6_FULL_REASS_MAX_REASSEMBLIES_DEFAULT *
+ IP6_FULL_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS /
+ MSEC_PER_SEC +
+ 1);
+ if (end > vec_len (rt->pool))
+ {
+ end = vec_len (rt->pool);
+ rt->last_id = 0;
+ }
+ else
+ {
+ rt->last_id = end;
+ }
+
+ pool_foreach_stepping_index (index, beg, end, rt->pool)
+ {
+ reass = pool_elt_at_index (rt->pool, index);
+ if (now > reass->last_heard + rm->timeout)
+ {
+ vec_add1 (pool_indexes_to_free, index);
+ }
+ }
+
int *i;
vec_foreach (i, pool_indexes_to_free)
{
ip6_full_reass_t *reass = pool_elt_at_index (rt->pool, i[0]);
u32 icmp_bi = ~0;
- ip6_full_reass_on_timeout (vm, node, reass, &icmp_bi);
+
+ reass_timeout_cnt += reass->fragments_n;
+ ip6_full_reass_on_timeout (vm, node, reass, &icmp_bi,
+ &n_left_to_next, &to_next);
if (~0 != icmp_bi)
vec_add1 (vec_icmp_bi, icmp_bi);
}
clib_spinlock_unlock (&rt->lock);
+ if (reass_timeout_cnt)
+ vlib_node_increment_counter (vm, node->node_index,
+ IP6_ERROR_REASS_TIMEOUT,
+ reass_timeout_cnt);
}
while (vec_len (vec_icmp_bi) > 0)
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;
vec_free (vec_icmp_bi);
if (event_data)
{
- _vec_len (event_data) = 0;
+ vec_set_len (event_data, 0);
}
}
}
VLIB_REGISTER_NODE (ip6_full_reass_expire_node) = {
- .function = ip6_full_reass_walk_expired,
- .format_trace = format_ip6_full_reass_trace,
- .type = VLIB_NODE_TYPE_PROCESS,
- .name = "ip6-full-reassembly-expire-walk",
-
- .n_errors = ARRAY_LEN (ip6_full_reassembly_error_strings),
- .error_strings = ip6_full_reassembly_error_strings,
+ .function = ip6_full_reass_walk_expired,
+ .format_trace = format_ip6_full_reass_trace,
+ .type = VLIB_NODE_TYPE_PROCESS,
+ .name = "ip6-full-reassembly-expire-walk",
+ .n_errors = IP6_N_ERROR,
+ .error_counters = ip6_error_counters,
};
static u8 *
}
always_inline uword
-ip6_full_reassembly_handoff_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame, bool is_feature)
+ip6_full_reassembly_handoff_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_frame_t *frame,
+ ip6_full_reass_node_type_t type,
+ bool is_local)
{
ip6_full_reass_main_t *rm = &ip6_full_reass_main;
b = bufs;
ti = thread_indices;
- fq_index = (is_feature) ? rm->fq_feature_index : rm->fq_index;
-
+ switch (type)
+ {
+ case NORMAL:
+ if (is_local)
+ {
+ fq_index = rm->fq_local_index;
+ }
+ else
+ {
+ fq_index = rm->fq_index;
+ }
+ break;
+ case FEATURE:
+ fq_index = rm->fq_feature_index;
+ break;
+ case CUSTOM:
+ fq_index = rm->fq_custom_index;
+ break;
+ default:
+ clib_warning ("Unexpected `type' (%d)!", type);
+ ASSERT (0);
+ }
while (n_left_from > 0)
{
ti[0] = vnet_buffer (b[0])->ip.reass.owner_thread_index;
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- return ip6_full_reassembly_handoff_inline (vm, node, frame,
- false /* is_feature */ );
+ return ip6_full_reassembly_handoff_inline (vm, node, frame, NORMAL,
+ false /* is_local */);
}
VLIB_REGISTER_NODE (ip6_full_reassembly_handoff_node) = {
},
};
+VLIB_NODE_FN (ip6_local_full_reassembly_handoff_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ return ip6_full_reassembly_handoff_inline (vm, node, frame, NORMAL,
+ true /* is_feature */);
+}
+
+VLIB_REGISTER_NODE (ip6_local_full_reassembly_handoff_node) = {
+ .name = "ip6-local-full-reassembly-handoff",
+ .vector_size = sizeof (u32),
+ .n_errors = ARRAY_LEN(ip6_full_reassembly_handoff_error_strings),
+ .error_strings = ip6_full_reassembly_handoff_error_strings,
+ .format_trace = format_ip6_full_reassembly_handoff_trace,
+
+ .n_next_nodes = 1,
+
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
VLIB_NODE_FN (ip6_full_reassembly_feature_handoff_node) (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
- return ip6_full_reassembly_handoff_inline (vm, node, frame, true /* is_feature */ );
+ return ip6_full_reassembly_handoff_inline (vm, node, frame, FEATURE,
+ false /* is_local */);
}
-
VLIB_REGISTER_NODE (ip6_full_reassembly_feature_handoff_node) = {
.name = "ip6-full-reass-feature-hoff",
.vector_size = sizeof (u32),
},
};
+VLIB_NODE_FN (ip6_full_reassembly_custom_handoff_node)
+(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
+{
+ return ip6_full_reassembly_handoff_inline (vm, node, frame, CUSTOM,
+ false /* is_local */);
+}
+
+VLIB_REGISTER_NODE (ip6_full_reassembly_custom_handoff_node) = {
+ .name = "ip6-full-reass-custom-hoff",
+ .vector_size = sizeof (u32),
+ .n_errors = ARRAY_LEN(ip6_full_reassembly_handoff_error_strings),
+ .error_strings = ip6_full_reassembly_handoff_error_strings,
+ .format_trace = format_ip6_full_reassembly_handoff_trace,
+
+ .n_next_nodes = 1,
+
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+
#ifndef CLIB_MARCH_VARIANT
int
ip6_full_reass_enable_disable_with_refcnt (u32 sw_if_index, int is_enable)
}
return -1;
}
+
+void
+ip6_local_full_reass_enable_disable (int enable)
+{
+ if (enable)
+ {
+ if (!ip6_full_reass_main.is_local_reass_enabled)
+ {
+ ip6_full_reass_main.is_local_reass_enabled = 1;
+ ip6_register_protocol (IP_PROTOCOL_IPV6_FRAGMENTATION,
+ ip6_local_full_reass_node.index);
+ }
+ }
+ else
+ {
+ if (ip6_full_reass_main.is_local_reass_enabled)
+ {
+ ip6_full_reass_main.is_local_reass_enabled = 0;
+ ip6_unregister_protocol (IP_PROTOCOL_IPV6_FRAGMENTATION);
+ }
+ }
+}
+
+int
+ip6_local_full_reass_enabled ()
+{
+ return ip6_full_reass_main.is_local_reass_enabled;
+}
+
#endif
/*
Code Review / vpp.git / blobdiff