/* * node.c: udp packet processing * * Copyright (c) 2013-2019 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 #include #include #include #include typedef enum { UDP_LOCAL_NEXT_PUNT, UDP_LOCAL_NEXT_DROP, UDP_LOCAL_NEXT_ICMP, UDP_LOCAL_N_NEXT } udp_local_next_t; typedef struct { u16 src_port; u16 dst_port; u8 bound; } udp_local_rx_trace_t; #define UDP_NO_NODE_SET ((u16) ~0) #ifndef CLIB_MARCH_VARIANT 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_local_rx_trace_t *t = va_arg (*args, udp_local_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; } #endif /* CLIB_MARCH_VARIANT */ always_inline uword udp46_local_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame, int is_ip4) { udp_main_t *um = &udp_main; __attribute__ ((unused)) u32 n_left_from, next_index, *from, *to_next; u8 punt_unknown = is_ip4 ? um->punt_unknown4 : um->punt_unknown6; u16 *next_by_dst_port = (is_ip4 ? um->next_by_dst_port4 : um->next_by_dst_port6); 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 = ip4_header_bytes (vlib_buffer_get_current (b0)); advance1 = ip4_header_bytes (vlib_buffer_get_current (b1)); } 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_LOCAL_NEXT_DROP; } else { vlib_buffer_advance (b0, advance0); h0 = vlib_buffer_get_current (b0); error0 = UDP_ERROR_NONE; next0 = UDP_LOCAL_NEXT_PUNT; if (PREDICT_FALSE (clib_net_to_host_u16 (h0->length) > vlib_buffer_length_in_chain (vm, b0))) { error0 = UDP_ERROR_LENGTH_ERROR; next0 = UDP_LOCAL_NEXT_DROP; } } if (PREDICT_FALSE (b1->current_length < advance1 + sizeof (*h1))) { error1 = UDP_ERROR_LENGTH_ERROR; next1 = UDP_LOCAL_NEXT_DROP; } else { vlib_buffer_advance (b1, advance1); h1 = vlib_buffer_get_current (b1); error1 = UDP_ERROR_NONE; next1 = UDP_LOCAL_NEXT_PUNT; if (PREDICT_FALSE (clib_net_to_host_u16 (h1->length) > vlib_buffer_length_in_chain (vm, b1))) { error1 = UDP_ERROR_LENGTH_ERROR; next1 = UDP_LOCAL_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 (next_by_dst_port, dst_port0, dst_port1, &i0, &i1); next0 = (error0 == 0) ? vec_elt (next_by_dst_port, i0) : next0; next1 = (error1 == 0) ? vec_elt (next_by_dst_port, i1) : next1; if (PREDICT_FALSE (i0 == SPARSE_VEC_INVALID_INDEX || next0 == UDP_NO_NODE_SET)) { // 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_LOCAL_NEXT_PUNT; } else if (is_ip4) { icmp4_error_set_vnet_buffer (b0, ICMP4_destination_unreachable, ICMP4_destination_unreachable_port_unreachable, 0); b0->error = node->errors[UDP_ERROR_NO_LISTENER]; next0 = UDP_LOCAL_NEXT_ICMP; } else { icmp6_error_set_vnet_buffer (b0, ICMP6_destination_unreachable, ICMP6_destination_unreachable_port_unreachable, 0); b0->error = node->errors[UDP_ERROR_NO_LISTENER]; next0 = UDP_LOCAL_NEXT_ICMP; } } else { b0->error = node
/*
 * mpls_error.def: mpls errors
 *
 * Copyright (c) 2012 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.
 */

mpls_error (NONE, "no error")
mpls_error (UNKNOWN_PROTOCOL, "unknown protocol")
mpls_error (UNSUPPORTED_VERSION, "unsupported version")
mpls_error (PKTS_DECAP, "MPLS input packets decapsulated")
mpls_error (PKTS_ENCAP, "MPLS output packets encapsulated")
mpls_error (PKTS_NEED_FRAG, "MPLS output packets needs fragmentation")
mpls_error (NO_LABEL, "MPLS no label for fib/dst")
mpls_error (TTL_EXPIRED, "MPLS ttl expired")