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-rw-r--r--src/plugins/pppoe/pppoe_decap.c422
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 00000000000..02c82711ddc
--- /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)
+
+