+++ /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.
- */
-
-#include <vnet/dns/dns.h>
-
-#include <vlib/vlib.h>
-#include <vnet/vnet.h>
-
-vlib_node_registration_t dns46_request_node;
-
-typedef struct
-{
- u32 pool_index;
- u32 disposition;
-} dns46_request_trace_t;
-
-/* packet trace format function */
-static u8 *
-format_dns46_request_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 *);
- dns46_request_trace_t *t = va_arg (*args, dns46_request_trace_t *);
-
- s = format (s, "DNS46_REPLY: pool index %d, disposition %d",
- t->pool_index, t->disposition);
- return s;
-}
-
-vlib_node_registration_t dns46_request_node;
-
-static char *dns46_request_error_strings[] = {
-#define _(sym,string) string,
- foreach_dns46_request_error
-#undef _
-};
-
-typedef enum
-{
- DNS46_REQUEST_NEXT_DROP,
- DNS46_REQUEST_NEXT_IP_LOOKUP,
- DNS46_REQUEST_NEXT_PUNT,
- DNS46_REQUEST_N_NEXT,
-} dns46_request_next_t;
-
-static uword
-dns46_request_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * frame,
- int is_ip6)
-{
- u32 n_left_from, *from, *to_next;
- dns46_request_next_t next_index;
- dns_main_t *dm = &dns_main;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
-#if 0
- while (n_left_from >= 4 && n_left_to_next >= 2)
- {
- u32 next0 = DNS46_REQUEST_NEXT_INTERFACE_OUTPUT;
- u32 next1 = DNS46_REQUEST_NEXT_INTERFACE_OUTPUT;
- u32 sw_if_index0, sw_if_index1;
- u8 tmp0[6], tmp1[6];
- ethernet_header_t *en0, *en1;
- u32 bi0, bi1;
- vlib_buffer_t *b0, *b1;
-
- /* Prefetch next iteration. */
- {
- vlib_buffer_t *p2, *p3;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
-
- vlib_prefetch_buffer_header (p2, LOAD);
- vlib_prefetch_buffer_header (p3, LOAD);
-
- CLIB_PREFETCH (p2->data, CLIB_CACHE_LINE_BYTES, STORE);
- CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
- }
-
- /* speculatively enqueue b0 and b1 to the current next frame */
- to_next[0] = bi0 = from[0];
- to_next[1] = bi1 = from[1];
- from += 2;
- to_next += 2;
- n_left_from -= 2;
- n_left_to_next -= 2;
-
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
-
- /* $$$$$ End of processing 2 x packets $$$$$ */
-
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
- {
- if (b0->flags & VLIB_BUFFER_IS_TRACED)
- {
- dns46_request_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- }
- if (b1->flags & VLIB_BUFFER_IS_TRACED)
- {
- dns46_request_trace_t *t =
- vlib_add_trace (vm, node, b1, sizeof (*t));
- t->sw_if_index = sw_if_index1;
- t->next_index = next1;
- }
- }
-
- /* verify speculative enqueues, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, next0, next1);
- }
-#endif
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t *b0;
- u32 next0 = DNS46_REQUEST_NEXT_DROP;
- u32 error0 = DNS46_REQUEST_ERROR_NONE;
- udp_header_t *u0;
- dns_header_t *d0;
- dns_query_t *q0;
- ip4_header_t *ip40 = 0;
- ip6_header_t *ip60 = 0;
- dns_cache_entry_t *ep0;
- dns_pending_request_t _t0, *t0 = &_t0;
- u16 flags0;
- u32 pool_index0 = ~0;
- u8 *name0;
- u8 *label0;
-
- /* speculatively enqueue b0 to the current next frame */
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- d0 = vlib_buffer_get_current (b0);
- u0 = (udp_header_t *) ((u8 *) d0 - sizeof (*u0));
-
- if (PREDICT_FALSE (dm->is_enabled == 0))
- {
- next0 = DNS46_REQUEST_NEXT_PUNT;
- goto done0;
- }
-
- if (is_ip6)
- {
- ip60 = (ip6_header_t *) (((u8 *) u0) - sizeof (ip6_header_t));
- next0 = DNS46_REQUEST_NEXT_DROP;
- error0 = DNS46_REQUEST_ERROR_UNIMPLEMENTED;
- goto done0;
- }
- else
- {
- ip40 = (ip4_header_t *) (((u8 *) u0) - sizeof (ip4_header_t));
- if (ip40->ip_version_and_header_length != 0x45)
- {
- error0 = DNS46_REQUEST_ERROR_IP_OPTIONS;
- goto done0;
- }
- }
- /* Parse through the DNS request */
- flags0 = clib_net_to_host_u16 (d0->flags);
-
- /* Requests only */
- if (flags0 & DNS_QR)
- {
- next0 = DNS46_REQUEST_NEXT_DROP;
- error0 = DNS46_REQUEST_ERROR_BAD_REQUEST;
- goto done0;
- }
- if (clib_net_to_host_u16 (d0->qdcount) != 1)
- {
- next0 = DNS46_REQUEST_NEXT_DROP;
- error0 = DNS46_REQUEST_ERROR_TOO_MANY_REQUESTS;
- goto done0;
- }
-
- label0 = (u8 *) (d0 + 1);
-
- /*
- * vnet_dns_labels_to_name produces a non NULL terminated vector
- * vnet_dns_resolve_name expects a C-string.
- */
- name0 = vnet_dns_labels_to_name (label0, (u8 *) d0, (u8 **) & q0);
- vec_add1 (name0, 0);
- _vec_len (name0) -= 1;
-
- t0->request_type = DNS_PEER_PENDING_NAME_TO_IP;
-
- /*
- * See if this is a reverse lookup. Both ip4 and ip6 reverse
- * requests end with ".arpa"
- */
- if (PREDICT_TRUE (vec_len (name0) > 5))
- {
- u8 *aptr0 = name0 + vec_len (name0) - 5;
-
- if (!memcmp (aptr0, ".arpa", 5))
- t0->request_type = DNS_PEER_PENDING_IP_TO_NAME;
- }
-
- t0->client_index = ~0;
- t0->is_ip6 = is_ip6;
- t0->dst_port = u0->src_port;
- t0->id = d0->id;
- t0->name = name0;
- if (is_ip6)
- clib_memcpy_fast (t0->dst_address, ip60->src_address.as_u8,
- sizeof (ip6_address_t));
- else
- clib_memcpy_fast (t0->dst_address, ip40->src_address.as_u8,
- sizeof (ip4_address_t));
-
- vnet_dns_resolve_name (dm, name0, t0, &ep0);
-
- if (ep0)
- {
- if (is_ip6)
- vnet_send_dns6_reply (dm, t0, ep0, b0);
- else
- vnet_send_dns4_reply (dm, t0, ep0, b0);
- next0 = DNS46_REQUEST_NEXT_IP_LOOKUP;
- }
- else
- {
- error0 = DNS46_REQUEST_ERROR_RESOLUTION_REQUIRED;
- }
-
- done0:
- b0->error = node->errors[error0];
-
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- dns46_request_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- t->disposition = error0;
- t->pool_index = pool_index0;
- }
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- return frame->n_vectors;
-}
-
-static uword
-dns4_request_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
-
- return dns46_request_inline (vm, node, frame, 0 /* is_ip6 */ );
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (dns4_request_node) =
-{
- .function = dns4_request_node_fn,
- .name = "dns4-request",
- .vector_size = sizeof (u32),
- .format_trace = format_dns46_request_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN (dns46_request_error_strings),
- .error_strings = dns46_request_error_strings,
- .n_next_nodes = DNS46_REQUEST_N_NEXT,
- .next_nodes = {
- [DNS46_REQUEST_NEXT_DROP] = "error-drop",
- [DNS46_REQUEST_NEXT_PUNT] = "error-punt",
- [DNS46_REQUEST_NEXT_IP_LOOKUP] = "ip4-lookup",
- },
-};
-/* *INDENT-ON* */
-
-static uword
-dns6_request_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
-
- return dns46_request_inline (vm, node, frame, 1 /* is_ip6 */ );
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (dns6_request_node) =
-{
- .function = dns6_request_node_fn,
- .name = "dns6-request",
- .vector_size = sizeof (u32),
- .format_trace = format_dns46_request_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN (dns46_request_error_strings),
- .error_strings = dns46_request_error_strings,
- .n_next_nodes = DNS46_REQUEST_N_NEXT,
- .next_nodes = {
- [DNS46_REQUEST_NEXT_DROP] = "error-drop",
- [DNS46_REQUEST_NEXT_PUNT] = "error-punt",
- [DNS46_REQUEST_NEXT_IP_LOOKUP] = "ip6-lookup",
- },
-};
-/* *INDENT-ON* */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff