#ifdef MAP_SKIP_IP6_LOOKUP
IP6_MAP_NEXT_IP4_REWRITE,
#endif
- IP6_MAP_NEXT_IP6_REASS,
IP6_MAP_NEXT_IP4_REASS,
IP6_MAP_NEXT_IP4_FRAGMENT,
IP6_MAP_NEXT_IP6_ICMP_RELAY,
}
else if (ip60->protocol == IP_PROTOCOL_IPV6_FRAGMENTATION)
{
- next0 = IP6_MAP_NEXT_IP6_REASS;
+ error0 = MAP_ERROR_FRAGMENTED;
}
else
{
}
else if (ip61->protocol == IP_PROTOCOL_IPV6_FRAGMENTATION)
{
- next1 = IP6_MAP_NEXT_IP6_REASS;
+ error1 = MAP_ERROR_FRAGMENTED;
}
else
{
(((ip6_frag_hdr_t *) (ip60 + 1))->next_hdr ==
IP_PROTOCOL_IP_IN_IP))
{
- next0 = IP6_MAP_NEXT_IP6_REASS;
+ error0 = MAP_ERROR_FRAGMENTED;
}
else
{
}
-static_always_inline void
-ip6_map_ip6_reass_prepare (vlib_main_t * vm, vlib_node_runtime_t * node,
- map_ip6_reass_t * r, u32 ** fragments_ready,
- u32 ** fragments_to_drop)
-{
- ip4_header_t *ip40;
- ip6_header_t *ip60;
- ip6_frag_hdr_t *frag0;
- vlib_buffer_t *p0;
-
- if (!r->ip4_header.ip_version_and_header_length)
- return;
-
- //The IP header is here, we need to check for packets
- //that can be forwarded
- int i;
- for (i = 0; i < MAP_IP6_REASS_MAX_FRAGMENTS_PER_REASSEMBLY; i++)
- {
- if (r->fragments[i].pi == ~0 ||
- ((!r->fragments[i].next_data_len)
- && (r->fragments[i].next_data_offset != (0xffff))))
- continue;
-
- p0 = vlib_get_buffer (vm, r->fragments[i].pi);
- ip60 = vlib_buffer_get_current (p0);
- frag0 = (ip6_frag_hdr_t *) (ip60 + 1);
- ip40 = (ip4_header_t *) (frag0 + 1);
-
- if (ip6_frag_hdr_offset (frag0))
- {
- //Not first fragment, add the IPv4 header
- clib_memcpy_fast (ip40, &r->ip4_header, 20);
- }
-
-#ifdef MAP_IP6_REASS_COUNT_BYTES
- r->forwarded +=
- clib_net_to_host_u16 (ip60->payload_length) - sizeof (*frag0);
-#endif
-
- if (ip6_frag_hdr_more (frag0))
- {
- //Not last fragment, we copy end of next
- clib_memcpy_fast (u8_ptr_add (ip60, p0->current_length),
- r->fragments[i].next_data, 20);
- p0->current_length += 20;
- ip60->payload_length = u16_net_add (ip60->payload_length, 20);
- }
-
- if (!ip4_is_fragment (ip40))
- {
- ip40->fragment_id = frag_id_6to4 (frag0->identification);
- ip40->flags_and_fragment_offset =
- clib_host_to_net_u16 (ip6_frag_hdr_offset (frag0));
- }
- else
- {
- ip40->flags_and_fragment_offset =
- clib_host_to_net_u16 (ip4_get_fragment_offset (ip40) +
- ip6_frag_hdr_offset (frag0));
- }
-
- if (ip6_frag_hdr_more (frag0))
- ip40->flags_and_fragment_offset |=
- clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS);
-
- ip40->length =
- clib_host_to_net_u16 (p0->current_length - sizeof (*ip60) -
- sizeof (*frag0));
- ip40->checksum = ip4_header_checksum (ip40);
-
- if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
- {
- map_ip6_map_ip6_reass_trace_t *tr =
- vlib_add_trace (vm, node, p0, sizeof (*tr));
- tr->offset = ip4_get_fragment_offset (ip40);
- tr->frag_len = clib_net_to_host_u16 (ip40->length) - sizeof (*ip40);
- tr->out = 1;
- }
-
- vec_add1 (*fragments_ready, r->fragments[i].pi);
- r->fragments[i].pi = ~0;
- r->fragments[i].next_data_len = 0;
- r->fragments[i].next_data_offset = 0;
- map_main.ip6_reass_buffered_counter--;
-
- //TODO: Best solution would be that ip6_map handles extension headers
- // and ignores atomic fragment. But in the meantime, let's just copy the header.
-
- u8 protocol = frag0->next_hdr;
- memmove (u8_ptr_add (ip40, -sizeof (*ip60)), ip60, sizeof (*ip60));
- ((ip6_header_t *) u8_ptr_add (ip40, -sizeof (*ip60)))->protocol =
- protocol;
- vlib_buffer_advance (p0, sizeof (*frag0));
- }
-}
-
void
map_ip6_drop_pi (u32 pi)
{
vlib_set_next_frame_buffer (vm, n, IP6_MAP_IP6_REASS_NEXT_DROP, pi);
}
-/*
- * ip6_reass
- * TODO: We should count the number of successfully
- * transmitted fragment bytes and compare that to the last fragment
- * offset such that we can free the reassembly structure when all fragments
- * have been forwarded.
- */
-static uword
-ip6_map_ip6_reass (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
- u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
- vlib_node_runtime_t *error_node =
- vlib_node_get_runtime (vm, ip6_map_ip6_reass_node.index);
- u32 *fragments_to_drop = NULL;
- u32 *fragments_ready = NULL;
-
- from = vlib_frame_vector_args (frame);
- 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);
-
- /* Single loop */
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 pi0;
- vlib_buffer_t *p0;
- u8 error0 = MAP_ERROR_NONE;
- ip6_header_t *ip60;
- ip6_frag_hdr_t *frag0;
- u16 offset;
- u16 next_offset;
- u16 frag_len;
-
- pi0 = to_next[0] = from[0];
- from += 1;
- n_left_from -= 1;
- to_next += 1;
- n_left_to_next -= 1;
-
- p0 = vlib_get_buffer (vm, pi0);
- ip60 = vlib_buffer_get_current (p0);
- frag0 = (ip6_frag_hdr_t *) (ip60 + 1);
- offset =
- clib_host_to_net_u16 (frag0->fragment_offset_and_more) & (~7);
- frag_len =
- clib_net_to_host_u16 (ip60->payload_length) - sizeof (*frag0);
- next_offset =
- ip6_frag_hdr_more (frag0) ? (offset + frag_len) : (0xffff);
-
- //FIXME: Support other extension headers, maybe
-
- if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
- {
- map_ip6_map_ip6_reass_trace_t *tr =
- vlib_add_trace (vm, node, p0, sizeof (*tr));
- tr->offset = offset;
- tr->frag_len = frag_len;
- tr->out = 0;
- }
-
- map_ip6_reass_lock ();
- map_ip6_reass_t *r =
- map_ip6_reass_get (&ip60->src_address, &ip60->dst_address,
- frag0->identification, frag0->next_hdr,
- &fragments_to_drop);
- //FIXME: Use better error codes
- if (PREDICT_FALSE (!r))
- {
- // Could not create a caching entry
- error0 = MAP_ERROR_FRAGMENT_MEMORY;
- }
- else if (PREDICT_FALSE ((frag_len <= 20 &&
- (ip6_frag_hdr_more (frag0) || (!offset)))))
- {
- //Very small fragment are restricted to the last one and
- //can't be the first one
- error0 = MAP_ERROR_FRAGMENT_MALFORMED;
- }
- else
- if (map_ip6_reass_add_fragment
- (r, pi0, offset, next_offset, (u8 *) (frag0 + 1), frag_len))
- {
- map_ip6_reass_free (r, &fragments_to_drop);
- error0 = MAP_ERROR_FRAGMENT_MEMORY;
- }
- else
- {
-#ifdef MAP_IP6_REASS_COUNT_BYTES
- if (!ip6_frag_hdr_more (frag0))
- r->expected_total = offset + frag_len;
-#endif
- ip6_map_ip6_reass_prepare (vm, node, r, &fragments_ready,
- &fragments_to_drop);
-#ifdef MAP_IP6_REASS_COUNT_BYTES
- if (r->forwarded >= r->expected_total)
- map_ip6_reass_free (r, &fragments_to_drop);
-#endif
- }
- map_ip6_reass_unlock ();
-
- if (error0 == MAP_ERROR_NONE)
- {
- if (frag_len > 20)
- {
- //Dequeue the packet
- n_left_to_next++;
- to_next--;
- }
- else
- {
- //All data from that packet was copied no need to keep it, but this is not an error
- p0->error = error_node->errors[MAP_ERROR_NONE];
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- pi0,
- IP6_MAP_IP6_REASS_NEXT_DROP);
- }
- }
- else
- {
- p0->error = error_node->errors[error0];
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
- n_left_to_next, pi0,
- IP6_MAP_IP6_REASS_NEXT_DROP);
- }
- }
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- map_send_all_to_node (vm, fragments_ready, node,
- &error_node->errors[MAP_ERROR_NONE],
- IP6_MAP_IP6_REASS_NEXT_IP6_MAP);
- map_send_all_to_node (vm, fragments_to_drop, node,
- &error_node->errors[MAP_ERROR_FRAGMENT_DROPPED],
- IP6_MAP_IP6_REASS_NEXT_DROP);
-
- vec_free (fragments_to_drop);
- vec_free (fragments_ready);
- return frame->n_vectors;
-}
-
/*
* ip6_map_post_ip4_reass
*/
.arc_name = "ip6-unicast",
.node_name = "ip6-map",
.runs_before = VNET_FEATURES ("ip6-flow-classify"),
+ .runs_after = VNET_FEATURES ("ip6-full-reassembly-feature"),
};
VLIB_REGISTER_NODE(ip6_map_node) = {
#ifdef MAP_SKIP_IP6_LOOKUP
[IP6_MAP_NEXT_IP4_REWRITE] = "ip4-load-balance",
#endif
- [IP6_MAP_NEXT_IP6_REASS] = "ip6-map-ip6-reass",
[IP6_MAP_NEXT_IP4_REASS] = "ip4-sv-reassembly-custom-next",
[IP6_MAP_NEXT_IP4_FRAGMENT] = "ip4-frag",
[IP6_MAP_NEXT_IP6_ICMP_RELAY] = "ip6-map-icmp-relay",
};
/* *INDENT-ON* */
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE(ip6_map_ip6_reass_node) = {
- .function = ip6_map_ip6_reass,
- .name = "ip6-map-ip6-reass",
- .vector_size = sizeof(u32),
- .format_trace = format_ip6_map_ip6_reass_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = MAP_N_ERROR,
- .error_strings = map_error_strings,
- .n_next_nodes = IP6_MAP_IP6_REASS_N_NEXT,
- .next_nodes = {
- [IP6_MAP_IP6_REASS_NEXT_IP6_MAP] = "ip6-map",
- [IP6_MAP_IP6_REASS_NEXT_DROP] = "error-drop",
- },
-};
-/* *INDENT-ON* */
-
/* *INDENT-OFF* */
VLIB_REGISTER_NODE(ip6_map_post_ip4_reass_node) = {
.function = ip6_map_post_ip4_reass,
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