diff options
Diffstat (limited to 'src/vnet/dns/request_node.c')
| -rw-r--r-- | src/vnet/dns/request_node.c | 344 |
1 files changed, 0 insertions, 344 deletions
diff --git a/src/vnet/dns/request_node.c b/src/vnet/dns/request_node.c deleted file mode 100644 index f9ad7cc0ad8..00000000000 --- a/src/vnet/dns/request_node.c +++ /dev/null @@ -1,344 +0,0 @@ -/* - * 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: - */ |