bool is_local)
{
u32 *from = vlib_frame_vector_args (frame);
- u32 n_left_from, n_left_to_next, *to_next, next_index;
+ u32 n_left, n_next = 0, to_next[VLIB_FRAME_SIZE];
ip4_full_reass_main_t *rm = &ip4_full_reass_main;
ip4_full_reass_per_thread_t *rt = &rm->per_thread_data[vm->thread_index];
+ u16 nexts[VLIB_FRAME_SIZE];
+
clib_spinlock_lock (&rt->lock);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
- while (n_left_from > 0)
+ n_left = frame->n_vectors;
+ while (n_left > 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;
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0;
+ u32 error0 = IP4_ERROR_NONE;
- bi0 = from[0];
- b0 = vlib_get_buffer (vm, bi0);
+ 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))
+ ip4_header_t *ip0 = vlib_buffer_get_current (b0);
+ if (!ip4_get_fragment_more (ip0) && !ip4_get_fragment_offset (ip0))
+ {
+ // this is a whole packet - no fragmentation
+ if (CUSTOM != type)
{
- // this is a whole packet - no fragmentation
- if (CUSTOM != type)
- {
- next0 = IP4_FULL_REASS_NEXT_INPUT;
- }
- else
- {
- next0 = vnet_buffer (b0)->ip.reass.next_index;
- }
- ip4_full_reass_add_trace (vm, node, NULL, bi0, PASSTHROUGH, 0,
- ~0);
- goto packet_enqueue;
+ next0 = IP4_FULL_REASS_NEXT_INPUT;
}
-
- if (is_local && !rm->is_local_reass_enabled)
+ else
{
- next0 = IP4_FULL_REASS_NEXT_DROP;
- goto packet_enqueue;
+ next0 = vnet_buffer (b0)->ip.reass.next_index;
}
+ ip4_full_reass_add_trace (vm, node, NULL, bi0, PASSTHROUGH, 0, ~0);
+ 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 (is_local && !rm->is_local_reass_enabled)
+ {
+ next0 = IP4_FULL_REASS_NEXT_DROP;
+ goto packet_enqueue;
+ }
- /* Keep track of received fragments */
- vlib_node_increment_counter (vm, node->node_index,
- IP4_ERROR_REASS_FRAGMENTS_RCVD, 1);
+ 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 && // 8 is minimum frag length per RFC 791
- ip4_get_fragment_more (ip0)))
- {
- next0 = IP4_FULL_REASS_NEXT_DROP;
- error0 = IP4_ERROR_REASS_MALFORMED_PACKET;
- goto packet_enqueue;
- }
+ /* Keep track of received fragments */
+ vlib_node_increment_counter (vm, node->node_index,
+ IP4_ERROR_REASS_FRAGMENTS_RCVD, 1);
+
+ if (fragment_first > fragment_last ||
+ fragment_first + fragment_length > UINT16_MAX - 20 ||
+ (fragment_length < 8 && // 8 is minimum frag length per RFC 791
+ ip4_get_fragment_more (ip0)))
+ {
+ next0 = IP4_FULL_REASS_NEXT_DROP;
+ error0 = IP4_ERROR_REASS_MALFORMED_PACKET;
+ goto packet_enqueue;
+ }
- u32 fib_index = vec_elt (ip4_main.fib_index_by_sw_if_index,
- vnet_buffer (b0)->sw_if_index[VLIB_RX]);
+ u32 fib_index = vec_elt (ip4_main.fib_index_by_sw_if_index,
+ vnet_buffer (b0)->sw_if_index[VLIB_RX]);
- ip4_full_reass_kv_t kv = { .k.fib_index = fib_index,
- .k.src.as_u32 = ip0->src_address.as_u32,
- .k.dst.as_u32 = ip0->dst_address.as_u32,
- .k.frag_id = ip0->fragment_id,
- .k.proto = ip0->protocol
+ ip4_full_reass_kv_t kv = { .k.fib_index = fib_index,
+ .k.src.as_u32 = ip0->src_address.as_u32,
+ .k.dst.as_u32 = ip0->dst_address.as_u32,
+ .k.frag_id = ip0->fragment_id,
+ .k.proto = ip0->protocol
- };
- u8 do_handoff = 0;
+ };
+ u8 do_handoff = 0;
- ip4_full_reass_t *reass =
- ip4_full_reass_find_or_create (vm, node, rm, rt, &kv, &do_handoff);
+ ip4_full_reass_t *reass =
+ ip4_full_reass_find_or_create (vm, node, rm, rt, &kv, &do_handoff);
- if (reass)
+ if (reass)
+ {
+ const u32 fragment_first = ip4_get_fragment_offset_bytes (ip0);
+ if (0 == fragment_first)
{
- const u32 fragment_first = ip4_get_fragment_offset_bytes (ip0);
- if (0 == fragment_first)
- {
- reass->sendout_thread_index = vm->thread_index;
- }
+ reass->sendout_thread_index = vm->thread_index;
}
+ }
- if (PREDICT_FALSE (do_handoff))
+ if (PREDICT_FALSE (do_handoff))
+ {
+ next0 = IP4_FULL_REASS_NEXT_HANDOFF;
+ vnet_buffer (b0)->ip.reass.owner_thread_index =
+ kv.v.memory_owner_thread_index;
+ }
+ else if (reass)
+ {
+ u32 handoff_thread_idx;
+ u32 counter = ~0;
+ switch (ip4_full_reass_update (vm, node, rm, rt, reass, &bi0, &next0,
+ &error0, CUSTOM == type,
+ &handoff_thread_idx))
{
+ case IP4_REASS_RC_OK:
+ /* nothing to do here */
+ break;
+ case IP4_REASS_RC_HANDOFF:
next0 = IP4_FULL_REASS_NEXT_HANDOFF;
+ b0 = vlib_get_buffer (vm, bi0);
vnet_buffer (b0)->ip.reass.owner_thread_index =
- kv.v.memory_owner_thread_index;
+ handoff_thread_idx;
+ break;
+ case IP4_REASS_RC_TOO_MANY_FRAGMENTS:
+ counter = IP4_ERROR_REASS_FRAGMENT_CHAIN_TOO_LONG;
+ break;
+ case IP4_REASS_RC_NO_BUF:
+ counter = IP4_ERROR_REASS_NO_BUF;
+ break;
+ case IP4_REASS_RC_INTERNAL_ERROR:
+ counter = IP4_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;
}
- else if (reass)
- {
- u32 handoff_thread_idx;
- u32 counter = ~0;
- switch (ip4_full_reass_update
- (vm, node, rm, rt, reass, &bi0, &next0,
- &error0, CUSTOM == type, &handoff_thread_idx))
- {
- case IP4_REASS_RC_OK:
- /* nothing to do here */
- break;
- case IP4_REASS_RC_HANDOFF:
- next0 = IP4_FULL_REASS_NEXT_HANDOFF;
- b0 = vlib_get_buffer (vm, bi0);
- vnet_buffer (b0)->ip.reass.owner_thread_index =
- handoff_thread_idx;
- break;
- case IP4_REASS_RC_TOO_MANY_FRAGMENTS:
- counter = IP4_ERROR_REASS_FRAGMENT_CHAIN_TOO_LONG;
- break;
- case IP4_REASS_RC_NO_BUF:
- counter = IP4_ERROR_REASS_NO_BUF;
- break;
- case IP4_REASS_RC_INTERNAL_ERROR:
- counter = IP4_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);
- ip4_full_reass_drop_all (vm, node, reass);
- ip4_full_reass_free (rm, rt, reass);
- goto next_packet;
- }
- }
- else
+ if (~0 != counter)
{
- next0 = IP4_FULL_REASS_NEXT_DROP;
- error0 = IP4_ERROR_REASS_LIMIT_REACHED;
+ vlib_node_increment_counter (vm, node->node_index, counter, 1);
+ ip4_full_reass_drop_all (vm, node, reass);
+ ip4_full_reass_free (rm, rt, reass);
+ goto next_packet;
}
+ }
+ else
+ {
+ next0 = IP4_FULL_REASS_NEXT_DROP;
+ error0 = IP4_ERROR_REASS_LIMIT_REACHED;
+ }
+ packet_enqueue:
- packet_enqueue:
-
- if (bi0 != ~0)
+ if (bi0 != ~0)
+ {
+ /* bi0 might have been updated by reass_finalize, reload */
+ b0 = vlib_get_buffer (vm, bi0);
+ if (IP4_ERROR_NONE != error0)
{
- to_next[0] = bi0;
- to_next += 1;
- n_left_to_next -= 1;
-
- /* bi0 might have been updated by reass_finalize, reload */
- b0 = vlib_get_buffer (vm, bi0);
- if (IP4_ERROR_NONE != error0)
- {
- b0->error = node->errors[error0];
- }
-
- if (next0 == IP4_FULL_REASS_NEXT_HANDOFF)
- {
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- ip4_full_reass_add_trace (
- vm, node, NULL, bi0, HANDOFF, 0,
- vnet_buffer (b0)->ip.reass.owner_thread_index);
- }
- }
- else if (FEATURE == type && IP4_ERROR_NONE == error0)
- {
- vnet_feature_next (&next0, b0);
- }
+ b0->error = node->errors[error0];
+ }
- /* Increment the counter to-custom-app also as this fragment is
- * also going to application */
- if (CUSTOM == type)
+ if (next0 == IP4_FULL_REASS_NEXT_HANDOFF)
+ {
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
{
- vlib_node_increment_counter (
- vm, node->node_index, IP4_ERROR_REASS_TO_CUSTOM_APP, 1);
+ ip4_full_reass_add_trace (
+ vm, node, NULL, bi0, HANDOFF, 0,
+ vnet_buffer (b0)->ip.reass.owner_thread_index);
}
+ }
+ else if (FEATURE == type && IP4_ERROR_NONE == error0)
+ {
+ vnet_feature_next (&next0, b0);
+ }
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- IP4_REASS_DEBUG_BUFFER (bi0, enqueue_next);
+ /* Increment the counter to-custom-app also as this fragment is
+ * also going to application */
+ if (CUSTOM == type)
+ {
+ vlib_node_increment_counter (vm, node->node_index,
+ IP4_ERROR_REASS_TO_CUSTOM_APP, 1);
}
- next_packet:
- from += 1;
- n_left_from -= 1;
+ to_next[n_next] = bi0;
+ nexts[n_next] = next0;
+ n_next++;
+ IP4_REASS_DEBUG_BUFFER (bi0, enqueue_next);
}
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ next_packet:
+ from += 1;
+ n_left -= 1;
}
clib_spinlock_unlock (&rt->lock);
+
+ vlib_buffer_enqueue_to_next (vm, node, to_next, nexts, n_next);
return frame->n_vectors;
}
Code Review / vpp.git / commitdiff