385 lines
12 KiB
C
385 lines
12 KiB
C
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/*
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* Copyright (c) 2017 Intel and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <vppinfra/error.h>
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#include <vppinfra/hash.h>
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#include <vnet/vnet.h>
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#include <vnet/ip/ip.h>
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#include <vnet/ethernet/ethernet.h>
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#include <pppoe/pppoe.h>
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/* Statistics (not all errors) */
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#define foreach_pppoe_encap_error \
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_(ENCAPSULATED, "good packets encapsulated")
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static char * pppoe_encap_error_strings[] = {
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#define _(sym,string) string,
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foreach_pppoe_encap_error
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#undef _
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};
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typedef enum {
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#define _(sym,str) PPPOE_ENCAP_ERROR_##sym,
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foreach_pppoe_encap_error
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#undef _
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PPPOE_ENCAP_N_ERROR,
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} pppoe_encap_error_t;
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#define foreach_pppoe_encap_next \
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_(DROP, "error-drop") \
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_(INTERFACE, "interface-output" ) \
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typedef enum
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{
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#define _(s,n) PPPOE_ENCAP_NEXT_##s,
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foreach_pppoe_encap_next
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#undef _
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PPPOE_ENCAP_N_NEXT,
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} pppoe_encap_next_t;
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typedef struct {
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u32 session_index;
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u32 session_id;
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} pppoe_encap_trace_t;
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u8 * format_pppoe_encap_trace (u8 * s, va_list * args)
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{
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CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
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CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
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pppoe_encap_trace_t * t
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= va_arg (*args, pppoe_encap_trace_t *);
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s = format (s, "PPPOE encap to pppoe_session%d session_id %d",
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t->session_index, t->session_id);
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return s;
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}
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#define foreach_fixed_header2_offset \
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_(0) _(1)
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static uword
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pppoe_encap (vlib_main_t * vm,
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vlib_node_runtime_t * node,
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vlib_frame_t * from_frame)
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{
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u32 n_left_from, next_index, * from, * to_next;
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pppoe_main_t * pem = &pppoe_main;
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vnet_main_t * vnm = pem->vnet_main;
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vnet_interface_main_t * im = &vnm->interface_main;
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u32 pkts_encapsulated = 0;
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u32 thread_index = vlib_get_thread_index();
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u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
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u32 sw_if_index0 = 0, sw_if_index1 = 0;
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u32 next0 = 0, next1 = 0;
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pppoe_session_t * t0 = NULL, * t1 = NULL;
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from = vlib_frame_vector_args (from_frame);
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n_left_from = from_frame->n_vectors;
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next_index = node->cached_next_index;
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stats_sw_if_index = node->runtime_data[0];
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stats_n_packets = stats_n_bytes = 0;
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while (n_left_from > 0)
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{
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u32 n_left_to_next;
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vlib_get_next_frame (vm, node, next_index,
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to_next, n_left_to_next);
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while (n_left_from >= 4 && n_left_to_next >= 2)
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{
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u32 bi0, bi1;
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vlib_buffer_t * b0, * b1;
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u32 len0, len1;
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ethernet_header_t * eth0, * eth1;
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pppoe_header_t * pppoe0, * pppoe1;
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u64 * copy_src0, * copy_dst0;
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u64 * copy_src1, * copy_dst1;
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u16 * copy_src_last0, * copy_dst_last0;
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u16 * copy_src_last1, * copy_dst_last1;
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u16 new_l0, new_l1;
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u32 session_id0, session_id1;
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/* Prefetch next iteration. */
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{
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vlib_buffer_t * p2, * p3;
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p2 = vlib_get_buffer (vm, from[2]);
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p3 = vlib_get_buffer (vm, from[3]);
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vlib_prefetch_buffer_header (p2, LOAD);
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vlib_prefetch_buffer_header (p3, LOAD);
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CLIB_PREFETCH (p2->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
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CLIB_PREFETCH (p3->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
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}
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bi0 = from[0];
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bi1 = from[1];
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to_next[0] = bi0;
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to_next[1] = bi1;
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from += 2;
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to_next += 2;
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n_left_to_next -= 2;
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n_left_from -= 2;
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b0 = vlib_get_buffer (vm, bi0);
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b1 = vlib_get_buffer (vm, bi1);
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/* Get next node index and if-index from session */
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sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_TX];
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session_id0 = pem->session_index_by_sw_if_index[sw_if_index0];
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t0 = pool_elt_at_index(pem->sessions, session_id0);
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next0 = PPPOE_ENCAP_NEXT_INTERFACE;
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vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->encap_if_index;
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/* Get next node index and if-index from session */
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sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_TX];
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session_id1 = pem->session_index_by_sw_if_index[sw_if_index1];
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t1 = pool_elt_at_index(pem->sessions, session_id1);
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next1 = PPPOE_ENCAP_NEXT_INTERFACE;
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vnet_buffer(b1)->sw_if_index[VLIB_TX] = t1->encap_if_index;
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/* Apply the rewrite string. $$$$ vnet_rewrite? */
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vlib_buffer_advance (b0, -(word)_vec_len(t0->rewrite));
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vlib_buffer_advance (b1, -(word)_vec_len(t1->rewrite));
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eth0 = (ethernet_header_t *)(vlib_buffer_get_current(b0));
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eth1 = (ethernet_header_t *)(vlib_buffer_get_current(b1));
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/* Copy the fixed header */
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copy_dst0 = (u64 *) eth0;
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copy_src0 = (u64 *) t0->rewrite;
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copy_dst1 = (u64 *) eth1;
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copy_src1 = (u64 *) t1->rewrite;
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/* Copy first 8-bytes at a time */
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#define _(offs) copy_dst0[offs] = copy_src0[offs];
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foreach_fixed_header2_offset;
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#undef _
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/* Last 6 octets. Hopefully gcc will be our friend */
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copy_dst_last0 = (u16 *)(©_dst0[2]);
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copy_src_last0 = (u16 *)(©_src0[2]);
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copy_dst_last0[0] = copy_src_last0[0];
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copy_dst_last0[1] = copy_src_last0[1];
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copy_dst_last0[2] = copy_src_last0[2];
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#define _(offs) copy_dst1[offs] = copy_src1[offs];
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foreach_fixed_header2_offset;
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#undef _
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/* Last 6 octets. Hopefully gcc will be our friend */
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copy_dst_last1 = (u16 *)(©_dst1[2]);
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copy_src_last1 = (u16 *)(©_src1[2]);
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copy_dst_last1[0] = copy_src_last1[0];
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copy_dst_last1[1] = copy_src_last1[1];
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copy_dst_last1[2] = copy_src_last1[2];
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/* Fix PPPoE length */
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new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b0)
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- sizeof (*pppoe0) - sizeof(*eth0));
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pppoe0 = (pppoe_header_t *)(eth0 + 1);
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pppoe0->length = new_l0;
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new_l1 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b1)
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- sizeof (*pppoe1) - sizeof(*eth1));
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pppoe1 = (pppoe_header_t *)(eth1 + 1);
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pppoe1->length = new_l1;
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pkts_encapsulated += 2;
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len0 = vlib_buffer_length_in_chain (vm, b0);
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len1 = vlib_buffer_length_in_chain (vm, b1);
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stats_n_packets += 2;
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stats_n_bytes += len0 + len1;
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/* Batch stats increment on the same pppoe session so counter is not
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incremented per packet. Note stats are still incremented for deleted
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and admin-down session where packets are dropped. It is not worthwhile
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to check for this rare case and affect normal path performance. */
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if (PREDICT_FALSE ((sw_if_index0 != stats_sw_if_index) ||
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(sw_if_index1 != stats_sw_if_index)))
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{
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stats_n_packets -= 2;
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stats_n_bytes -= len0 + len1;
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if (sw_if_index0 == sw_if_index1)
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{
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if (stats_n_packets)
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vlib_increment_combined_counter
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(im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
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thread_index, stats_sw_if_index,
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stats_n_packets, stats_n_bytes);
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stats_sw_if_index = sw_if_index0;
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stats_n_packets = 2;
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stats_n_bytes = len0 + len1;
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}
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else
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{
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vlib_increment_combined_counter
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(im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
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thread_index, sw_if_index0, 1, len0);
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vlib_increment_combined_counter
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(im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
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thread_index, sw_if_index1, 1, len1);
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}
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}
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if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
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{
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pppoe_encap_trace_t *tr =
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vlib_add_trace (vm, node, b0, sizeof (*tr));
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tr->session_index = t0 - pem->sessions;
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tr->session_id = t0->session_id;
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}
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if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
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{
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pppoe_encap_trace_t *tr =
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vlib_add_trace (vm, node, b1, sizeof (*tr));
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tr->session_index = t1 - pem->sessions;
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tr->session_id = t1->session_id;
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}
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vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
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to_next, n_left_to_next,
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bi0, bi1, next0, next1);
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}
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while (n_left_from > 0 && n_left_to_next > 0)
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{
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u32 bi0;
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vlib_buffer_t * b0;
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ethernet_header_t * eth0;
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pppoe_header_t * pppoe0;
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u64 * copy_src0, * copy_dst0;
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u16 * copy_src_last0, * copy_dst_last0;
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u16 new_l0;
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u32 len0;
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u32 session_id0;
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bi0 = from[0];
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to_next[0] = bi0;
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from += 1;
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to_next += 1;
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n_left_from -= 1;
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n_left_to_next -= 1;
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b0 = vlib_get_buffer (vm, bi0);
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/* Get next node index and if-index from session */
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sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_TX];
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session_id0 = pem->session_index_by_sw_if_index[sw_if_index0];
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t0 = pool_elt_at_index(pem->sessions, session_id0);
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next0 = PPPOE_ENCAP_NEXT_INTERFACE;
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vnet_buffer(b0)->sw_if_index[VLIB_TX] = t0->encap_if_index;
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/* Apply the rewrite string. $$$$ vnet_rewrite? */
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vlib_buffer_advance (b0, -(word)_vec_len(t0->rewrite));
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eth0 = (ethernet_header_t *)(vlib_buffer_get_current(b0));
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/* Copy the fixed header */
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copy_dst0 = (u64 *) eth0;
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copy_src0 = (u64 *) t0->rewrite;
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/* Copy first 8-bytes at a time */
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#define _(offs) copy_dst0[offs] = copy_src0[offs];
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foreach_fixed_header2_offset;
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#undef _
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/* Last 6 octets. Hopefully gcc will be our friend */
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copy_dst_last0 = (u16 *)(©_dst0[2]);
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copy_src_last0 = (u16 *)(©_src0[2]);
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copy_dst_last0[0] = copy_src_last0[0];
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copy_dst_last0[1] = copy_src_last0[1];
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copy_dst_last0[2] = copy_src_last0[2];
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/* Fix PPPoE length */
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new_l0 = clib_host_to_net_u16 (vlib_buffer_length_in_chain(vm, b0)
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- sizeof (*pppoe0) - sizeof(*eth0));
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pppoe0 = (pppoe_header_t *)(eth0 + 1);
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pppoe0->length = new_l0;
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pkts_encapsulated ++;
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len0 = vlib_buffer_length_in_chain (vm, b0);
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stats_n_packets += 1;
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stats_n_bytes += len0;
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/* Batch stats increment on the same pppoe session so counter is not
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incremented per packet. Note stats are still incremented for deleted
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and admin-down session where packets are dropped. It is not worthwhile
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to check for this rare case and affect normal path performance. */
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if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
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{
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stats_n_packets -= 1;
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stats_n_bytes -= len0;
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if (stats_n_packets)
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vlib_increment_combined_counter
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||
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|
(im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
|
||
|
|
thread_index, stats_sw_if_index,
|
||
|
|
stats_n_packets, stats_n_bytes);
|
||
|
|
stats_n_packets = 1;
|
||
|
|
stats_n_bytes = len0;
|
||
|
|
stats_sw_if_index = sw_if_index0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
|
||
|
|
{
|
||
|
|
pppoe_encap_trace_t *tr =
|
||
|
|
vlib_add_trace (vm, node, b0, sizeof (*tr));
|
||
|
|
tr->session_index = t0 - pem->sessions;
|
||
|
|
tr->session_id = t0->session_id;
|
||
|
|
}
|
||
|
|
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);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Do we still need this now that session tx stats is kept? */
|
||
|
|
vlib_node_increment_counter (vm, node->node_index,
|
||
|
|
PPPOE_ENCAP_ERROR_ENCAPSULATED,
|
||
|
|
pkts_encapsulated);
|
||
|
|
|
||
|
|
/* Increment any remaining batch stats */
|
||
|
|
if (stats_n_packets)
|
||
|
|
{
|
||
|
|
vlib_increment_combined_counter
|
||
|
|
(im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX,
|
||
|
|
thread_index, stats_sw_if_index, stats_n_packets, stats_n_bytes);
|
||
|
|
node->runtime_data[0] = stats_sw_if_index;
|
||
|
|
}
|
||
|
|
|
||
|
|
return from_frame->n_vectors;
|
||
|
|
}
|
||
|
|
|
||
|
|
VLIB_REGISTER_NODE (pppoe_encap_node) = {
|
||
|
|
.function = pppoe_encap,
|
||
|
|
.name = "pppoe-encap",
|
||
|
|
.vector_size = sizeof (u32),
|
||
|
|
.format_trace = format_pppoe_encap_trace,
|
||
|
|
.type = VLIB_NODE_TYPE_INTERNAL,
|
||
|
|
.n_errors = ARRAY_LEN(pppoe_encap_error_strings),
|
||
|
|
.error_strings = pppoe_encap_error_strings,
|
||
|
|
.n_next_nodes = PPPOE_ENCAP_N_NEXT,
|
||
|
|
.next_nodes = {
|
||
|
|
#define _(s,n) [PPPOE_ENCAP_NEXT_##s] = n,
|
||
|
|
foreach_pppoe_encap_next
|
||
|
|
#undef _
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
VLIB_NODE_FUNCTION_MULTIARCH (pppoe_encap_node, pppoe_encap)
|
||
|
|
|