+++ /dev/null
-/*
- * node.c: udp packet processing
- *
- * Copyright (c) 2013 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 <vlib/vlib.h>
-#include <vnet/pg/pg.h>
-#include <vnet/ip/udp.h>
-#include <vnet/ip/udp_packet.h>
-#include <vppinfra/sparse_vec.h>
-
-udp_main_t udp_main;
-
-#define foreach_udp_input_next \
- _ (PUNT, "error-punt") \
- _ (DROP, "error-drop") \
- _ (ICMP4_ERROR, "ip4-icmp-error") \
- _ (ICMP6_ERROR, "ip6-icmp-error")
-
-typedef enum
-{
-#define _(s,n) UDP_INPUT_NEXT_##s,
- foreach_udp_input_next
-#undef _
- UDP_INPUT_N_NEXT,
-} udp_input_next_t;
-
-typedef struct
-{
- u16 src_port;
- u16 dst_port;
- u8 bound;
-} udp_rx_trace_t;
-
-u8 *
-format_udp_rx_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 *);
- udp_rx_trace_t *t = va_arg (*args, udp_rx_trace_t *);
-
- s = format (s, "UDP: src-port %d dst-port %d%s",
- clib_net_to_host_u16 (t->src_port),
- clib_net_to_host_u16 (t->dst_port),
- t->bound ? "" : " (no listener)");
- return s;
-}
-
-typedef struct
-{
- /* Sparse vector mapping udp dst_port in network byte order
- to next index. */
- u16 *next_by_dst_port;
- u8 punt_unknown;
-} udp_input_runtime_t;
-
-vlib_node_registration_t udp4_input_node;
-vlib_node_registration_t udp6_input_node;
-
-always_inline uword
-udp46_input_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * from_frame, int is_ip4)
-{
- udp_input_runtime_t *rt = is_ip4 ?
- (void *) vlib_node_get_runtime_data (vm, udp4_input_node.index)
- : (void *) vlib_node_get_runtime_data (vm, udp6_input_node.index);
- __attribute__ ((unused)) u32 n_left_from, next_index, *from, *to_next;
- word n_no_listener = 0;
- u8 punt_unknown = rt->punt_unknown;
-
- from = vlib_frame_vector_args (from_frame);
- n_left_from = 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);
-
- while (n_left_from >= 4 && n_left_to_next >= 2)
- {
- u32 bi0, bi1;
- vlib_buffer_t *b0, *b1;
- udp_header_t *h0 = 0, *h1 = 0;
- u32 i0, i1, dst_port0, dst_port1;
- u32 advance0, advance1;
- u32 error0, next0, error1, next1;
-
- /* 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, sizeof (h0[0]), LOAD);
- CLIB_PREFETCH (p3->data, sizeof (h1[0]), LOAD);
- }
-
- bi0 = from[0];
- bi1 = from[1];
- to_next[0] = bi0;
- to_next[1] = bi1;
- from += 2;
- to_next += 2;
- n_left_to_next -= 2;
- n_left_from -= 2;
-
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
-
- /* ip4/6_local hands us the ip header, not the udp header */
- if (is_ip4)
- {
- advance0 = sizeof (ip4_header_t);
- advance1 = sizeof (ip4_header_t);
- }
- else
- {
- advance0 = sizeof (ip6_header_t);
- advance1 = sizeof (ip6_header_t);
- }
-
- if (PREDICT_FALSE (b0->current_length < advance0 + sizeof (*h0)))
- {
- error0 = UDP_ERROR_LENGTH_ERROR;
- next0 = UDP_INPUT_NEXT_DROP;
- }
- else
- {
- vlib_buffer_advance (b0, advance0);
- h0 = vlib_buffer_get_current (b0);
- error0 = next0 = 0;
- if (PREDICT_FALSE (clib_net_to_host_u16 (h0->length) >
- vlib_buffer_length_in_chain (vm, b0)))
- {
- error0 = UDP_ERROR_LENGTH_ERROR;
- next0 = UDP_INPUT_NEXT_DROP;
- }
- }
-
- if (PREDICT_FALSE (b1->current_length < advance1 + sizeof (*h1)))
- {
- error1 = UDP_ERROR_LENGTH_ERROR;
- next1 = UDP_INPUT_NEXT_DROP;
- }
- else
- {
- vlib_buffer_advance (b1, advance1);
- h1 = vlib_buffer_get_current (b1);
- error1 = next1 = 0;
- if (PREDICT_FALSE (clib_net_to_host_u16 (h1->length) >
- vlib_buffer_length_in_chain (vm, b1)))
- {
- error1 = UDP_ERROR_LENGTH_ERROR;
- next1 = UDP_INPUT_NEXT_DROP;
- }
- }
-
- /* Index sparse array with network byte order. */
- dst_port0 = (error0 == 0) ? h0->dst_port : 0;
- dst_port1 = (error1 == 0) ? h1->dst_port : 0;
- sparse_vec_index2 (rt->next_by_dst_port, dst_port0, dst_port1,
- &i0, &i1);
- next0 = (error0 == 0) ? vec_elt (rt->next_by_dst_port, i0) : next0;
- next1 = (error1 == 0) ? vec_elt (rt->next_by_dst_port, i1) : next1;
-
- if (PREDICT_FALSE (i0 == SPARSE_VEC_INVALID_INDEX))
- {
- // move the pointer back so icmp-error can find the
- // ip packet header
- vlib_buffer_advance (b0, -(word) advance0);
-
- if (PREDICT_FALSE (punt_unknown))
- {
- b0->error = node->errors[UDP_ERROR_PUNT];
- next0 = UDP_INPUT_NEXT_PUNT;
- }
- else if (is_ip4)
- {
- icmp4_error_set_vnet_buffer (b0,
- ICMP4_destination_unreachable,
- ICMP4_destination_unreachable_port_unreachable,
- 0);
- next0 = UDP_INPUT_NEXT_ICMP4_ERROR;
- n_no_listener++;
- }
- else
- {
- icmp6_error_set_vnet_buffer (b0,
- ICMP6_destination_unreachable,
- ICMP6_destination_unreachable_port_unreachable,
- 0);
- next0 = UDP_INPUT_NEXT_ICMP6_ERROR;
- n_no_listener++;
- }
- }
- else
- {
- b0->error = node->errors[UDP_ERROR_NONE];
- // advance to the payload
- vlib_buffer_advance (b0, sizeof (*h0));
- }
-
- if (PREDICT_FALSE (i1 == SPARSE_VEC_INVALID_INDEX))
- {
- // move the pointer back so icmp-error can find the
- // ip packet header
- vlib_buffer_advance (b1, -(word) advance1);
-
- if (PREDICT_FALSE (punt_unknown))
- {
- b1->error = node->errors[UDP_ERROR_PUNT];
- next1 = UDP_INPUT_NEXT_PUNT;
- }
- else if (is_ip4)
- {
- icmp4_error_set_vnet_buffer (b1,
- ICMP4_destination_unreachable,
- ICMP4_destination_unreachable_port_unreachable,
- 0);
- next1 = UDP_INPUT_NEXT_ICMP4_ERROR;
- n_no_listener++;
- }
- else
- {
- icmp6_error_set_vnet_buffer (b1,
- ICMP6_destination_unreachable,
- ICMP6_destination_unreachable_port_unreachable,
- 0);
- next1 = UDP_INPUT_NEXT_ICMP6_ERROR;
- n_no_listener++;
- }
- }
- else
- {
- b1->error = node->errors[UDP_ERROR_NONE];
- // advance to the payload
- vlib_buffer_advance (b1, sizeof (*h1));
- }
-
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- udp_rx_trace_t *tr = vlib_add_trace (vm, node,
- b0, sizeof (*tr));
- if (b0->error != node->errors[UDP_ERROR_LENGTH_ERROR])
- {
- tr->src_port = h0 ? h0->src_port : 0;
- tr->dst_port = h0 ? h0->dst_port : 0;
- tr->bound = (next0 != UDP_INPUT_NEXT_ICMP4_ERROR &&
- next0 != UDP_INPUT_NEXT_ICMP6_ERROR);
- }
- }
- if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
- {
- udp_rx_trace_t *tr = vlib_add_trace (vm, node,
- b1, sizeof (*tr));
- if (b1->error != node->errors[UDP_ERROR_LENGTH_ERROR])
- {
- tr->src_port = h1 ? h1->src_port : 0;
- tr->dst_port = h1 ? h1->dst_port : 0;
- tr->bound = (next1 != UDP_INPUT_NEXT_ICMP4_ERROR &&
- next1 != UDP_INPUT_NEXT_ICMP6_ERROR);
- }
- }
-
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, next0, next1);
- }
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t *b0;
- udp_header_t *h0 = 0;
- u32 i0, next0;
- u32 advance0;
-
- 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);
-
- /* ip4/6_local hands us the ip header, not the udp header */
- if (is_ip4)
- advance0 = sizeof (ip4_header_t);
- else
- advance0 = sizeof (ip6_header_t);
-
- if (PREDICT_FALSE (b0->current_length < advance0 + sizeof (*h0)))
- {
- b0->error = node->errors[UDP_ERROR_LENGTH_ERROR];
- next0 = UDP_INPUT_NEXT_DROP;
- goto trace_x1;
- }
-
- vlib_buffer_advance (b0, advance0);
-
- h0 = vlib_buffer_get_current (b0);
-
- if (PREDICT_TRUE (clib_net_to_host_u16 (h0->length) <=
- vlib_buffer_length_in_chain (vm, b0)))
- {
- i0 = sparse_vec_index (rt->next_by_dst_port, h0->dst_port);
- next0 = vec_elt (rt->next_by_dst_port, i0);
-
- if (PREDICT_FALSE (i0 == SPARSE_VEC_INVALID_INDEX))
- {
- // move the pointer back so icmp-error can find the
- // ip packet header
- vlib_buffer_advance (b0, -(word) advance0);
-
- if (PREDICT_FALSE (punt_unknown))
- {
- b0->error = node->errors[UDP_ERROR_PUNT];
- next0 = UDP_INPUT_NEXT_PUNT;
- }
- else if (is_ip4)
- {
- icmp4_error_set_vnet_buffer (b0,
- ICMP4_destination_unreachable,
- ICMP4_destination_unreachable_port_unreachable,
- 0);
- next0 = UDP_INPUT_NEXT_ICMP4_ERROR;
- n_no_listener++;
- }
- else
- {
- icmp6_error_set_vnet_buffer (b0,
- ICMP6_destination_unreachable,
- ICMP6_destination_unreachable_port_unreachable,
- 0);
- next0 = UDP_INPUT_NEXT_ICMP6_ERROR;
- n_no_listener++;
- }
- }
- else
- {
- b0->error = node->errors[UDP_ERROR_NONE];
- // advance to the payload
- vlib_buffer_advance (b0, sizeof (*h0));
- }
- }
- else
- {
- b0->error = node->errors[UDP_ERROR_LENGTH_ERROR];
- next0 = UDP_INPUT_NEXT_DROP;
- }
-
- trace_x1:
- if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- udp_rx_trace_t *tr = vlib_add_trace (vm, node,
- b0, sizeof (*tr));
- if (b0->error != node->errors[UDP_ERROR_LENGTH_ERROR])
- {
- tr->src_port = h0->src_port;
- tr->dst_port = h0->dst_port;
- tr->bound = (next0 != UDP_INPUT_NEXT_ICMP4_ERROR &&
- next0 != UDP_INPUT_NEXT_ICMP6_ERROR);
- }
- }
-
- 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);
- }
- vlib_error_count (vm, node->node_index, UDP_ERROR_NO_LISTENER,
- n_no_listener);
- return from_frame->n_vectors;
-}
-
-static char *udp_error_strings[] = {
-#define udp_error(n,s) s,
-#include "udp_error.def"
-#undef udp_error
-};
-
-static uword
-udp4_input (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * from_frame)
-{
- return udp46_input_inline (vm, node, from_frame, 1 /* is_ip4 */ );
-}
-
-static uword
-udp6_input (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * from_frame)
-{
- return udp46_input_inline (vm, node, from_frame, 0 /* is_ip4 */ );
-}
-
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (udp4_input_node) = {
- .function = udp4_input,
- .name = "ip4-udp-lookup",
- /* Takes a vector of packets. */
- .vector_size = sizeof (u32),
-
- .runtime_data_bytes = sizeof (udp_input_runtime_t),
-
- .n_errors = UDP_N_ERROR,
- .error_strings = udp_error_strings,
-
- .n_next_nodes = UDP_INPUT_N_NEXT,
- .next_nodes = {
-#define _(s,n) [UDP_INPUT_NEXT_##s] = n,
- foreach_udp_input_next
-#undef _
- },
-
- .format_buffer = format_udp_header,
- .format_trace = format_udp_rx_trace,
- .unformat_buffer = unformat_udp_header,
-};
-/* *INDENT-ON* */
-
-VLIB_NODE_FUNCTION_MULTIARCH (udp4_input_node, udp4_input);
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (udp6_input_node) = {
- .function = udp6_input,
- .name = "ip6-udp-lookup",
- /* Takes a vector of packets. */
- .vector_size = sizeof (u32),
-
- .runtime_data_bytes = sizeof (udp_input_runtime_t),
-
- .n_errors = UDP_N_ERROR,
- .error_strings = udp_error_strings,
-
- .n_next_nodes = UDP_INPUT_N_NEXT,
- .next_nodes = {
-#define _(s,n) [UDP_INPUT_NEXT_##s] = n,
- foreach_udp_input_next
-#undef _
- },
-
- .format_buffer = format_udp_header,
- .format_trace = format_udp_rx_trace,
- .unformat_buffer = unformat_udp_header,
-};
-/* *INDENT-ON* */
-
-VLIB_NODE_FUNCTION_MULTIARCH (udp6_input_node, udp6_input);
-
-static void
-add_dst_port (udp_main_t * um,
- udp_dst_port_t dst_port, char *dst_port_name, u8 is_ip4)
-{
- udp_dst_port_info_t *pi;
- u32 i;
-
- vec_add2 (um->dst_port_infos[is_ip4], pi, 1);
- i = pi - um->dst_port_infos[is_ip4];
-
- pi->name = dst_port_name;
- pi->dst_port = dst_port;
- pi->next_index = pi->node_index = ~0;
-
- hash_set (um->dst_port_info_by_dst_port[is_ip4], dst_port, i);
-
- if (pi->name)
- hash_set_mem (um->dst_port_info_by_name[is_ip4], pi->name, i);
-}
-
-void
-udp_register_dst_port (vlib_main_t * vm,
- udp_dst_port_t dst_port, u32 node_index, u8 is_ip4)
-{
- udp_main_t *um = &udp_main;
- udp_dst_port_info_t *pi;
- udp_input_runtime_t *rt;
- u16 *n;
-
- {
- clib_error_t *error = vlib_call_init_function (vm, udp_local_init);
- if (error)
- clib_error_report (error);
- }
-
- pi = udp_get_dst_port_info (um, dst_port, is_ip4);
- if (!pi)
- {
- add_dst_port (um, dst_port, 0, is_ip4);
- pi = udp_get_dst_port_info (um, dst_port, is_ip4);
- ASSERT (pi);
- }
-
- pi->node_index = node_index;
- pi->next_index = vlib_node_add_next (vm,
- is_ip4 ? udp4_input_node.index
- : udp6_input_node.index, node_index);
-
- /* Setup udp protocol -> next index sparse vector mapping. */
- rt = vlib_node_get_runtime_data
- (vm, is_ip4 ? udp4_input_node.index : udp6_input_node.index);
- n = sparse_vec_validate (rt->next_by_dst_port,
- clib_host_to_net_u16 (dst_port));
- n[0] = pi->next_index;
-}
-
-void
-udp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add)
-{
- udp_input_runtime_t *rt;
-
- {
- clib_error_t *error = vlib_call_init_function (vm, udp_local_init);
- if (error)
- clib_error_report (error);
- }
-
- rt = vlib_node_get_runtime_data
- (vm, is_ip4 ? udp4_input_node.index : udp6_input_node.index);
-
- rt->punt_unknown = is_add;
-}
-
-/* Parse a UDP header. */
-uword
-unformat_udp_header (unformat_input_t * input, va_list * args)
-{
- u8 **result = va_arg (*args, u8 **);
- udp_header_t *udp;
- __attribute__ ((unused)) int old_length;
- u16 src_port, dst_port;
-
- /* Allocate space for IP header. */
- {
- void *p;
-
- old_length = vec_len (*result);
- vec_add2 (*result, p, sizeof (ip4_header_t));
- udp = p;
- }
-
- memset (udp, 0, sizeof (udp[0]));
- if (unformat (input, "src-port %d dst-port %d", &src_port, &dst_port))
- {
- udp->src_port = clib_host_to_net_u16 (src_port);
- udp->dst_port = clib_host_to_net_u16 (dst_port);
- return 1;
- }
- return 0;
-}
-
-static void
-udp_setup_node (vlib_main_t * vm, u32 node_index)
-{
- vlib_node_t *n = vlib_get_node (vm, node_index);
- pg_node_t *pn = pg_get_node (node_index);
-
- n->format_buffer = format_udp_header;
- n->unformat_buffer = unformat_udp_header;
- pn->unformat_edit = unformat_pg_udp_header;
-}
-
-clib_error_t *
-udp_local_init (vlib_main_t * vm)
-{
- udp_input_runtime_t *rt;
- udp_main_t *um = &udp_main;
- int i;
-
- {
- clib_error_t *error;
- error = vlib_call_init_function (vm, udp_init);
- if (error)
- clib_error_report (error);
- }
-
-
- for (i = 0; i < 2; i++)
- {
- um->dst_port_info_by_name[i] = hash_create_string (0, sizeof (uword));
- um->dst_port_info_by_dst_port[i] = hash_create (0, sizeof (uword));
- }
-
- udp_setup_node (vm, udp4_input_node.index);
- udp_setup_node (vm, udp6_input_node.index);
-
- rt = vlib_node_get_runtime_data (vm, udp4_input_node.index);
-
- rt->next_by_dst_port = sparse_vec_new
- ( /* elt bytes */ sizeof (rt->next_by_dst_port[0]),
- /* bits in index */ BITS (((udp_header_t *) 0)->dst_port));
-
- rt->punt_unknown = 0;
-
-#define _(n,s) add_dst_port (um, UDP_DST_PORT_##s, #s, 1 /* is_ip4 */);
- foreach_udp4_dst_port
-#undef _
- rt = vlib_node_get_runtime_data (vm, udp6_input_node.index);
-
- rt->next_by_dst_port = sparse_vec_new
- ( /* elt bytes */ sizeof (rt->next_by_dst_port[0]),
- /* bits in index */ BITS (((udp_header_t *) 0)->dst_port));
-
- rt->punt_unknown = 0;
-
-#define _(n,s) add_dst_port (um, UDP_DST_PORT_##s, #s, 0 /* is_ip4 */);
- foreach_udp6_dst_port
-#undef _
- ip4_register_protocol (IP_PROTOCOL_UDP, udp4_input_node.index);
- /* Note: ip6 differs from ip4, UDP is hotwired to ip6-udp-lookup */
- return 0;
-}
-
-VLIB_INIT_FUNCTION (udp_local_init);
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff