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authorDave Barach <dave@barachs.net>2019-08-21 19:23:00 -0400
committerFlorin Coras <florin.coras@gmail.com>2019-08-22 15:05:49 +0000
commit34af0ccf5cf27d8a72119626d2d009222e4ff0a6 (patch)
treeab108d50c4b59de2122dd5f6cd8f06f3543a2b47 /src/vnet/dns/reply_node.c
parent2ca9a84bd00f2aee642d0147c1b99d4be5725a70 (diff)
dns: make the dns name resolver a plugin
Type: refactor Signed-off-by: Dave Barach <dave@barachs.net> Change-Id: I823c2cd307a4613653a2d20f564dda062d4da31b
Diffstat (limited to 'src/vnet/dns/reply_node.c')
-rw-r--r--src/vnet/dns/reply_node.c227
1 files changed, 0 insertions, 227 deletions
diff --git a/src/vnet/dns/reply_node.c b/src/vnet/dns/reply_node.c
deleted file mode 100644
index 77d54c84019..00000000000
--- a/src/vnet/dns/reply_node.c
+++ /dev/null
@@ -1,227 +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_reply_node;
-
-typedef struct
-{
- u32 pool_index;
- u32 disposition;
-} dns46_reply_trace_t;
-
-/* packet trace format function */
-static u8 *
-format_dns46_reply_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_reply_trace_t *t = va_arg (*args, dns46_reply_trace_t *);
-
- s = format (s, "DNS46_REPLY: pool index %d, disposition %d",
- t->pool_index, t->disposition);
- return s;
-}
-
-vlib_node_registration_t dns46_reply_node;
-
-static char *dns46_reply_error_strings[] = {
-#define _(sym,string) string,
- foreach_dns46_reply_error
-#undef _
-};
-
-typedef enum
-{
- DNS46_REPLY_NEXT_DROP,
- DNS46_REPLY_NEXT_PUNT,
- DNS46_REPLY_N_NEXT,
-} dns46_reply_next_t;
-
-static uword
-dns46_reply_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
- u32 n_left_from, *from, *to_next;
- dns46_reply_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_REPLY_NEXT_INTERFACE_OUTPUT;
- u32 next1 = DNS46_REPLY_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_reply_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_reply_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_REPLY_NEXT_DROP;
- dns_header_t *d0;
- u32 pool_index0 = ~0;
- u32 error0 = 0;
- u8 *resp0 = 0;
-
- /* 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);
- if (PREDICT_FALSE (dm->is_enabled == 0))
- {
- next0 = DNS46_REPLY_NEXT_PUNT;
- error0 = DNS46_REPLY_ERROR_DISABLED;
- goto done0;
- }
-
- pool_index0 = clib_host_to_net_u16 (d0->id);
-
- /* Save the reply */
- vec_validate (resp0, vlib_buffer_length_in_chain (vm, b0) - 1);
- clib_memcpy_fast (resp0, d0, vlib_buffer_length_in_chain (vm, b0));
-
- /*
- * Deal with everything in process ctx on the main thread
- */
- vlib_process_signal_event_mt (vm, dm->resolver_process_node_index,
- DNS_RESOLVER_EVENT_RESOLVED,
- (uword) resp0);
- error0 = DNS46_REPLY_ERROR_PROCESSED;
-
- done0:
- b0->error = node->errors[error0];
-
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
- && (b0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- dns46_reply_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;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (dns46_reply_node) =
-{
- .function = dns46_reply_node_fn,
- .name = "dns46_reply",
- .vector_size = sizeof (u32),
- .format_trace = format_dns46_reply_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
- .n_errors = ARRAY_LEN (dns46_reply_error_strings),
- .error_strings = dns46_reply_error_strings,
- .n_next_nodes = DNS46_REPLY_N_NEXT,
- .next_nodes = {
- [DNS46_REPLY_NEXT_DROP] = "error-drop",
- [DNS46_REPLY_NEXT_PUNT] = "error-punt",
- },
-};
-/* *INDENT-ON* */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */