diff options
Diffstat (limited to 'src/plugins/pppoe/pppoe_decap.c')
| -rw-r--r-- | src/plugins/pppoe/pppoe_decap.c | 422 |
1 files changed, 422 insertions, 0 deletions
diff --git a/src/plugins/pppoe/pppoe_decap.c b/src/plugins/pppoe/pppoe_decap.c new file mode 100644 index 00000000..02c82711 --- /dev/null +++ b/src/plugins/pppoe/pppoe_decap.c @@ -0,0 +1,422 @@ +/* + * decap.c: pppoe session decap packet processing + * + * Copyright (c) 2017 Intel 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/ppp/packet.h> +#include <pppoe/pppoe.h> + +typedef struct { + u32 next_index; + u32 session_index; + u32 session_id; + u32 error; +} pppoe_rx_trace_t; + +static u8 * format_pppoe_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 *); + pppoe_rx_trace_t * t = va_arg (*args, pppoe_rx_trace_t *); + + if (t->session_index != ~0) + { + s = format (s, "PPPoE decap from pppoe_session%d session_id %d next %d error %d", + t->session_index, t->session_id, t->next_index, t->error); + } + else + { + s = format (s, "PPPoE decap error - session for session_id %d does not exist", + t->session_id); + } + return s; +} + +static uword +pppoe_input (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + u32 n_left_from, next_index, * from, * to_next; + pppoe_main_t * pem = &pppoe_main; + vnet_main_t * vnm = pem->vnet_main; + vnet_interface_main_t * im = &vnm->interface_main; + u32 pkts_decapsulated = 0; + u32 thread_index = vlib_get_thread_index(); + u32 stats_sw_if_index, stats_n_packets, stats_n_bytes; + pppoe_entry_key_t cached_key; + pppoe_entry_result_t cached_result; + + from = vlib_frame_vector_args (from_frame); + n_left_from = from_frame->n_vectors; + + /* Clear the one-entry cache in case session table was updated */ + cached_key.raw = ~0; + cached_result.raw = ~0; /* warning be gone */ + + next_index = node->cached_next_index; + stats_sw_if_index = node->runtime_data[0]; + stats_n_packets = stats_n_bytes = 0; + + 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; + u32 next0, next1; + ethernet_header_t *h0, *h1; + pppoe_header_t * pppoe0, * pppoe1; + u16 ppp_proto0 = 0, ppp_proto1 = 0; + pppoe_session_t * t0, * t1; + u32 error0, error1; + u32 sw_if_index0, sw_if_index1, len0, len1; + pppoe_entry_key_t key0, key1; + pppoe_entry_result_t result0, result1; + u32 bucket0, bucket1; + + /* 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, 2*CLIB_CACHE_LINE_BYTES, LOAD); + CLIB_PREFETCH (p3->data, 2*CLIB_CACHE_LINE_BYTES, 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); + error0 = 0; + error1 = 0; + + /* leaves current_data pointing at the pppoe header */ + pppoe0 = vlib_buffer_get_current (b0); + pppoe1 = vlib_buffer_get_current (b1); + ppp_proto0 = clib_net_to_host_u16(pppoe0->ppp_proto); + ppp_proto1 = clib_net_to_host_u16(pppoe1->ppp_proto); + + /* Manipulate packet 0 */ + if ((ppp_proto0 != PPP_PROTOCOL_ip4) + && (ppp_proto0 != PPP_PROTOCOL_ip6)) + { + error0 = PPPOE_ERROR_CONTROL_PLANE; + next0 = PPPOE_INPUT_NEXT_CP_INPUT; + goto trace0; + } + + /* get client mac */ + vlib_buffer_reset(b0); + h0 = vlib_buffer_get_current (b0); + + pppoe_lookup_1 (&pem->session_table, &cached_key, &cached_result, + h0->src_address, pppoe0->session_id, + &key0, &bucket0, &result0); + if (PREDICT_FALSE (result0.fields.session_index == ~0)) + { + error0 = PPPOE_ERROR_NO_SUCH_SESSION; + next0 = PPPOE_INPUT_NEXT_DROP; + goto trace0; + } + + t0 = pool_elt_at_index (pem->sessions, + result0.fields.session_index); + + /* Pop Eth and PPPPoE header */ + vlib_buffer_advance(b0, sizeof(*h0)+sizeof(*pppoe0)); + + next0 = (ppp_proto0==PPP_PROTOCOL_ip4)? + PPPOE_INPUT_NEXT_IP4_INPUT + : PPPOE_INPUT_NEXT_IP6_INPUT; + + sw_if_index0 = t0->sw_if_index; + len0 = vlib_buffer_length_in_chain (vm, b0); + + pkts_decapsulated ++; + stats_n_packets += 1; + stats_n_bytes += len0; + + /* Batch stats increment on the same pppoe session so counter + is not incremented per packet */ + if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index)) + { + stats_n_packets -= 1; + stats_n_bytes -= len0; + if (stats_n_packets) + vlib_increment_combined_counter + (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX, + 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; + } + + trace0: + b0->error = error0 ? node->errors[error0] : 0; + + if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) + { + pppoe_rx_trace_t *tr + = vlib_add_trace (vm, node, b0, sizeof (*tr)); + tr->next_index = next0; + tr->error = error0; + tr->session_index = result0.fields.session_index; + tr->session_id = clib_net_to_host_u32(pppoe0->session_id); + } + + + /* Manipulate packet 1 */ + if ((ppp_proto1 != PPP_PROTOCOL_ip4) + && (ppp_proto1 != PPP_PROTOCOL_ip6)) + { + error1 = PPPOE_ERROR_CONTROL_PLANE; + next1 = PPPOE_INPUT_NEXT_CP_INPUT; + goto trace1; + } + + /* get client mac */ + vlib_buffer_reset(b1); + h1 = vlib_buffer_get_current (b1); + + pppoe_lookup_1 (&pem->session_table, &cached_key, &cached_result, + h1->src_address, pppoe1->session_id, + &key1, &bucket1, &result1); + if (PREDICT_FALSE (result1.fields.session_index == ~0)) + { + error1 = PPPOE_ERROR_NO_SUCH_SESSION; + next1 = PPPOE_INPUT_NEXT_DROP; + goto trace1; + } + + t1 = pool_elt_at_index (pem->sessions, + result1.fields.session_index); + + /* Pop Eth and PPPPoE header */ + vlib_buffer_advance(b1, sizeof(*h1)+sizeof(*pppoe1)); + + next1 = (ppp_proto1==PPP_PROTOCOL_ip4)? + PPPOE_INPUT_NEXT_IP4_INPUT + : PPPOE_INPUT_NEXT_IP6_INPUT; + + sw_if_index1 = t1->sw_if_index; + len1 = vlib_buffer_length_in_chain (vm, b1); + + pkts_decapsulated ++; + stats_n_packets += 1; + stats_n_bytes += len1; + + /* Batch stats increment on the same pppoe session so counter + is not incremented per packet */ + if (PREDICT_FALSE (sw_if_index1 != stats_sw_if_index)) + { + stats_n_packets -= 1; + stats_n_bytes -= len1; + if (stats_n_packets) + vlib_increment_combined_counter + (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX, + thread_index, stats_sw_if_index, + stats_n_packets, stats_n_bytes); + stats_n_packets = 1; + stats_n_bytes = len1; + stats_sw_if_index = sw_if_index1; + } + + trace1: + b1->error = error1 ? node->errors[error1] : 0; + + if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED)) + { + pppoe_rx_trace_t *tr + = vlib_add_trace (vm, node, b1, sizeof (*tr)); + tr->next_index = next1; + tr->error = error1; + tr->session_index = result1.fields.session_index; + tr->session_id = clib_net_to_host_u32(pppoe1->session_id); + } + + 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; + u32 next0; + ethernet_header_t *h0; + pppoe_header_t * pppoe0; + u16 ppp_proto0 = 0; + pppoe_session_t * t0; + u32 error0; + u32 sw_if_index0, len0; + pppoe_entry_key_t key0; + pppoe_entry_result_t result0; + u32 bucket0; + + 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); + error0 = 0; + + /* leaves current_data pointing at the pppoe header */ + pppoe0 = vlib_buffer_get_current (b0); + ppp_proto0 = clib_net_to_host_u16(pppoe0->ppp_proto); + + if ((ppp_proto0 != PPP_PROTOCOL_ip4) + && (ppp_proto0 != PPP_PROTOCOL_ip6)) + { + error0 = PPPOE_ERROR_CONTROL_PLANE; + next0 = PPPOE_INPUT_NEXT_CP_INPUT; + goto trace00; + } + + /* get client mac */ + vlib_buffer_reset(b0); + h0 = vlib_buffer_get_current (b0); + + pppoe_lookup_1 (&pem->session_table, &cached_key, &cached_result, + h0->src_address, pppoe0->session_id, + &key0, &bucket0, &result0); + if (PREDICT_FALSE (result0.fields.session_index == ~0)) + { + error0 = PPPOE_ERROR_NO_SUCH_SESSION; + next0 = PPPOE_INPUT_NEXT_DROP; + goto trace00; + } + + t0 = pool_elt_at_index (pem->sessions, + result0.fields.session_index); + + /* Pop Eth and PPPPoE header */ + vlib_buffer_advance(b0, sizeof(*h0)+sizeof(*pppoe0)); + + next0 = (ppp_proto0==PPP_PROTOCOL_ip4)? + PPPOE_INPUT_NEXT_IP4_INPUT + : PPPOE_INPUT_NEXT_IP6_INPUT; + + sw_if_index0 = t0->sw_if_index; + len0 = vlib_buffer_length_in_chain (vm, b0); + + pkts_decapsulated ++; + stats_n_packets += 1; + stats_n_bytes += len0; + + /* Batch stats increment on the same pppoe session so counter + is not incremented per packet */ + if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index)) + { + stats_n_packets -= 1; + stats_n_bytes -= len0; + if (stats_n_packets) + vlib_increment_combined_counter + (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX, + 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; + } + + trace00: + b0->error = error0 ? node->errors[error0] : 0; + + if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) + { + pppoe_rx_trace_t *tr + = vlib_add_trace (vm, node, b0, sizeof (*tr)); + tr->next_index = next0; + tr->error = error0; + tr->session_index = result0.fields.session_index; + tr->session_id = clib_net_to_host_u16(pppoe0->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, pppoe_input_node.index, + PPPOE_ERROR_DECAPSULATED, + pkts_decapsulated); + + /* Increment any remaining batch stats */ + if (stats_n_packets) + { + vlib_increment_combined_counter + (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX, + 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; +} + +static char * pppoe_error_strings[] = { +#define pppoe_error(n,s) s, +#include <pppoe/pppoe_error.def> +#undef pppoe_error +#undef _ +}; + +VLIB_REGISTER_NODE (pppoe_input_node) = { + .function = pppoe_input, + .name = "pppoe-input", + /* Takes a vector of packets. */ + .vector_size = sizeof (u32), + + .n_errors = PPPOE_N_ERROR, + .error_strings = pppoe_error_strings, + + .n_next_nodes = PPPOE_INPUT_N_NEXT, + .next_nodes = { +#define _(s,n) [PPPOE_INPUT_NEXT_##s] = n, + foreach_pppoe_input_next +#undef _ + }, + + .format_trace = format_pppoe_rx_trace, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (pppoe_input_node, pppoe_input) + + |