#include <vnet/ip/ip6_to_ip4.h>
#include <vppinfra/bihash_48_8.h>
#include <vnet/ip/reass/ip6_sv_reass.h>
+#include <vnet/ip/ip6_inlines.h>
#define MSEC_PER_SEC 1000
#define IP6_SV_REASS_TIMEOUT_DEFAULT_MS 100
IP6_SV_REASS_RC_TOO_MANY_FRAGMENTS,
IP6_SV_REASS_RC_INTERNAL_ERROR,
IP6_SV_REASS_RC_UNSUPP_IP_PROTO,
+ IP6_SV_REASS_RC_INVALID_FRAG_LEN,
} ip6_sv_reass_rc_t;
typedef struct
{
ip6_address_t src;
ip6_address_t dst;
- u32 xx_id;
+ u32 fib_index;
u32 frag_id;
u8 unused[7];
u8 proto;
clib_net_to_host_u16 (t->l4_dst_port));
break;
case REASS_PASSTHROUGH:
- s = format (s, "[not-fragmented]");
+ s = format (s, "[not fragmented or atomic fragment]");
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);
+ if (pool_is_free_index
+ (vm->trace_main.trace_buffer_pool, vlib_buffer_get_trace_index (b)))
+ {
+ // this buffer's trace is gone
+ b->flags &= ~VLIB_BUFFER_IS_TRACED;
+ return;
+ }
ip6_sv_reass_trace_t *t = vlib_add_trace (vm, node, b, sizeof (t[0]));
if (reass)
{
}
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_find_or_create (vlib_main_t *vm, ip6_sv_reass_main_t *rm,
+ ip6_sv_reass_per_thread_t *rt,
+ ip6_sv_reass_kv_t *kv, u8 *do_handoff)
{
ip6_sv_reass_t *reass = NULL;
- f64 now = vlib_time_now (rm->vlib_main);
+ f64 now = vlib_time_now (vm);
+
+again:
- if (!clib_bihash_search_48_8
- (&rm->hash, (clib_bihash_kv_48_8_t *) kv, (clib_bihash_kv_48_8_t *) kv))
+ if (!clib_bihash_search_48_8 (&rm->hash, &kv->kv, &kv->kv))
{
if (vm->thread_index != kv->v.thread_index)
{
if (rt->reass_n >= rm->max_reass_n)
{
- reass = pool_elt_at_index (rt->pool, rt->lru_last);
+ reass = pool_elt_at_index (rt->pool, rt->lru_first);
ip6_sv_reass_free (vm, rm, rt, reass);
}
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];
+ 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.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))
+ int rv = clib_bihash_add_del_48_8 (&rm->hash, &kv->kv, 2);
+ if (rv)
{
ip6_sv_reass_free (vm, rm, rt, reass);
reass = NULL;
+ // if other worker created a context already work with the other copy
+ if (-2 == rv)
+ goto again;
}
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)
+ip6_sv_reass_update (vlib_main_t *vm, vlib_node_runtime_t *node,
+ ip6_sv_reass_main_t *rm, 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);
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_SV_REASS_RC_INVALID_FRAG_LEN;
+ }
u32 fragment_last = fvnb->ip.reass.fragment_last =
fragment_first + fragment_length - 1;
fvnb->ip.reass.range_first = fragment_first;
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,
+ ip6_sv_reass_add_trace (vm, node, reass, bi0, REASS_FINISH,
reass->ip_proto, reass->l4_src_port,
reass->l4_dst_port);
}
{
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);
+ ip6_sv_reass_add_trace (vm, node, 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)
{
}
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_sv_reass_verify_upper_layer_present (vlib_node_runtime_t *node,
+ vlib_buffer_t *b,
+ ip6_ext_hdr_chain_t *hc)
{
- 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)
+ int nh = hc->eh[hc->length - 1].protocol;
+ /* Checking to see if it's a terminating header */
+ if (ip6_ext_hdr (nh))
{
- icmp6_error_set_vnet_buffer (b, ICMP6_parameter_problem,
- ICMP6_parameter_problem_first_fragment_has_incomplete_header_chain,
- 0);
+ 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)
{
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)
{
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))
+ ip6_frag_hdr_t *frag_hdr;
+ ip6_ext_hdr_chain_t hdr_chain;
+ bool is_atomic_fragment = false;
+
+ 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)
{
frag_hdr =
- ip6_ext_header_find (vm, b0, ip0,
- IP_PROTOCOL_IPV6_FRAGMENTATION,
- &prev_hdr);
+ ip6_ext_next_header_offset (ip0, hdr_chain.eh[res].offset);
+ is_atomic_fragment = (0 == ip6_frag_hdr_offset (frag_hdr) &&
+ !ip6_frag_hdr_more (frag_hdr));
}
- if (!frag_hdr)
+
+ if (res < 0 ||
+ hdr_chain.eh[res].protocol != IP_PROTOCOL_IPV6_FRAGMENTATION ||
+ is_atomic_fragment)
{
- // this is a regular packet - no fragmentation
+ // this is a regular unfragmented packet or an atomic fragment
if (!ip6_get_port
(vm, b0, ip0, b0->current_length,
&(vnet_buffer (b0)->ip.reass.ip_proto),
&(vnet_buffer (b0)->ip.reass.tcp_seq_number)))
{
error0 = IP6_ERROR_REASS_UNSUPP_IP_PROTO;
+ b0->error = node->errors[error0];
next0 = IP6_SV_REASSEMBLY_NEXT_DROP;
goto packet_enqueue;
}
next0 = IP6_SV_REASSEMBLY_NEXT_INPUT;
if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
- ip6_sv_reass_add_trace (vm, node, rm, NULL, bi0,
- REASS_PASSTHROUGH,
- vnet_buffer (b0)->ip.reass.ip_proto,
- vnet_buffer (b0)->ip.
- reass.l4_src_port,
- vnet_buffer (b0)->ip.
- reass.l4_dst_port);
+ ip6_sv_reass_add_trace (
+ vm, node, NULL, bi0, REASS_PASSTHROUGH,
+ vnet_buffer (b0)->ip.reass.ip_proto,
+ vnet_buffer (b0)->ip.reass.l4_src_port,
+ vnet_buffer (b0)->ip.reass.l4_dst_port);
}
goto packet_enqueue;
}
+
vnet_buffer (b0)->ip.reass.ip6_frag_hdr_offset =
- (u8 *) frag_hdr - (u8 *) ip0;
+ hdr_chain.eh[res].offset;
+
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))
+ if (!ip6_sv_reass_verify_upper_layer_present (node, b0,
+ &hdr_chain))
{
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))
+ if (!ip6_sv_reass_verify_fragment_multiple_8 (vm, b0, frag_hdr) ||
+ !ip6_sv_reass_verify_packet_size_lt_64k (vm, b0, frag_hdr))
{
next0 = IP6_SV_REASSEMBLY_NEXT_ICMP_ERROR;
goto packet_enqueue;
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);
+ ip6_sv_reass_find_or_create (vm, rm, rt, &kv, &do_handoff);
if (PREDICT_FALSE (do_handoff))
{
{
next0 = IP6_SV_REASSEMBLY_NEXT_DROP;
error0 = IP6_ERROR_REASS_LIMIT_REACHED;
+ b0->error = node->errors[error0];
goto packet_enqueue;
}
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);
+ ip6_sv_reass_add_trace (
+ vm, node, 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))
+ u32 counter = ~0;
+ switch (ip6_sv_reass_update (vm, node, rm, 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;
+ counter = IP6_ERROR_REASS_FRAGMENT_CHAIN_TOO_LONG;
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;
+ counter = IP6_ERROR_REASS_UNSUPP_IP_PROTO;
break;
case IP6_SV_REASS_RC_INTERNAL_ERROR:
- vlib_node_increment_counter (vm, node->node_index,
- IP6_ERROR_REASS_INTERNAL_ERROR, 1);
+ counter = IP6_ERROR_REASS_INTERNAL_ERROR;
+ break;
+ case IP6_SV_REASS_RC_INVALID_FRAG_LEN:
+ counter = IP6_ERROR_REASS_INVALID_FRAG_LEN;
+ break;
+ }
+ if (~0 != counter)
+ {
+ vlib_node_increment_counter (vm, node->node_index, counter, 1);
ip6_sv_reass_free (vm, rm, rt, reass);
goto next_packet;
- break;
}
- b0->error = node->errors[error0];
-
if (reass->is_complete)
{
u32 idx;
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);
+ ip6_sv_reass_add_trace (
+ vm, node, 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
+ vec_set_len (reass->cached_buffers,
+ 0); // buffers are owned by frame now
}
goto next_packet;
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;
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)
.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_errors = IP6_N_ERROR,
+ .error_counters = ip6_error_counters,
.n_next_nodes = IP6_SV_REASSEMBLY_N_NEXT,
.next_nodes =
{
.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_errors = IP6_N_ERROR,
+ .error_counters = ip6_error_counters,
.n_next_nodes = IP6_SV_REASSEMBLY_N_NEXT,
.next_nodes =
{
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 =
#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_walk_expired (vlib_main_t *vm,
+ CLIB_UNUSED (vlib_node_runtime_t *node),
+ CLIB_UNUSED (vlib_frame_t *f))
{
ip6_sv_reass_main_t *rm = &ip6_sv_reass_main;
uword event_type, *event_data = 0;
switch (event_type)
{
- case ~0: /* no events => timeout */
- /* nothing to do here */
- break;
+ case ~0:
+ /* no events => timeout */
+ /* fallthrough */
case IP6_EVENT_CONFIG_CHANGED:
+ /* nothing to do here */
break;
default:
clib_warning ("BUG: event type 0x%wx", event_type);
vec_reset_length (pool_indexes_to_free);
/* *INDENT-OFF* */
- pool_foreach_index (index, rt->pool, ({
+ 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_free (pool_indexes_to_free);
if (event_data)
{
- _vec_len (event_data) = 0;
+ vec_set_len (event_data, 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,
+ .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 = IP6_N_ERROR,
+ .error_counters = ip6_error_counters,
};
/* *INDENT-ON* */
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);
+ s =
+ format (s, "fib_index: %u, src: %U, dst: %U, frag_id: %u, proto: %u",
+ key->fib_index, format_ip6_address, &key->src, format_ip6_address,
+ &key->dst, clib_net_to_host_u16 (key->frag_id), key->proto);
return s;
}
if (details)
{
/* *INDENT-OFF* */
- pool_foreach (reass, rt->pool, {
+ pool_foreach (reass, rt->pool) {
vlib_cli_output (vm, "%U", format_ip6_sv_reass, vm, reass);
- });
+ }
/* *INDENT-ON* */
}
sum_reass_n += rt->reass_n;
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,
+ "Maximum configured concurrent shallow virtual IP6 reassemblies per worker-thread: %lu\n",
+ (long unsigned) rm->max_reass_n);
+ vlib_cli_output (vm,
+ "Maximum configured amount of fragments per shallow "
+ "virtual IP6 reassembly: %lu\n",
+ (long unsigned) rm->max_reass_len);
+ vlib_cli_output (vm,
+ "Maximum configured shallow virtual IP6 reassembly timeout: %lums\n",
+ (long unsigned) rm->timeout_ms);
+ vlib_cli_output (vm,
+ "Maximum configured shallow virtual IP6 reassembly expire walk interval: %lums\n",
+ (long unsigned) rm->expire_walk_interval_ms);
vlib_cli_output (vm, "Buffers in use: %lu\n",
(long unsigned) sum_buffers_n);
return 0;
ti += 1;
b += 1;
}
- n_enq =
- vlib_buffer_enqueue_to_thread (vm, fq_index, from, thread_indices,
- frame->n_vectors, 1);
+ n_enq = vlib_buffer_enqueue_to_thread (vm, node, fq_index, from,
+ thread_indices, frame->n_vectors, 1);
if (n_enq < frame->n_vectors)
vlib_node_increment_counter (vm, node->node_index,
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