--- /dev/null
+/*
+ * Copyright (c) 2015 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/vnet.h>
+#include <vppinfra/error.h>
+
+#include <vnet/lawful-intercept/lawful_intercept.h>
+
+#include <vppinfra/error.h>
+#include <vppinfra/elog.h>
+
+vlib_node_registration_t li_hit_node;
+
+typedef struct {
+ u32 next_index;
+} li_hit_trace_t;
+
+/* packet trace format function */
+static u8 * format_li_hit_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 *);
+ li_hit_trace_t * t = va_arg (*args, li_hit_trace_t *);
+
+ s = format (s, "LI_HIT: next index %d", t->next_index);
+
+ return s;
+}
+
+vlib_node_registration_t li_hit_node;
+
+#define foreach_li_hit_error \
+_(HITS, "LI packets processed") \
+_(NO_COLLECTOR, "No collector configured")
+
+typedef enum {
+#define _(sym,str) LI_HIT_ERROR_##sym,
+ foreach_li_hit_error
+#undef _
+ LI_HIT_N_ERROR,
+} li_hit_error_t;
+
+static char * li_hit_error_strings[] = {
+#define _(sym,string) string,
+ foreach_li_hit_error
+#undef _
+};
+
+typedef enum {
+ LI_HIT_NEXT_ETHERNET,
+ LI_HIT_N_NEXT,
+} li_hit_next_t;
+
+static uword
+li_hit_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ u32 n_left_from, * from, * to_next;
+ li_hit_next_t next_index;
+ vlib_frame_t * int_frame = 0;
+ u32 * to_int_next = 0;
+ li_main_t * lm = &li_main;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ if (PREDICT_FALSE (vec_len (lm->collectors) == 0))
+ {
+ vlib_node_increment_counter (vm, li_hit_node.index,
+ LI_HIT_ERROR_NO_COLLECTOR,
+ n_left_from);
+ }
+ else
+ {
+ /* The intercept frame... */
+ int_frame = vlib_get_frame_to_node (vm, ip4_lookup_node.index);
+ to_int_next = vlib_frame_vector_args (int_frame);
+ }
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index,
+ to_next, n_left_to_next);
+
+#if 0
+ while (n_left_from >= 4 && n_left_to_next >= 2)
+ {
+ u32 next0 = LI_HIT_NEXT_INTERFACE_OUTPUT;
+ u32 next1 = LI_HIT_NEXT_INTERFACE_OUTPUT;
+ u32 sw_if_index0, sw_if_index1;
+ u8 tmp0[6], tmp1[6];
+ ethernet_header_t *en0, *en1;
+ u32 bi0, bi1;
+ vlib_buffer_t * b0, * b1;
+
+ /* 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, CLIB_CACHE_LINE_BYTES, STORE);
+ CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
+ }
+
+ /* speculatively enqueue b0 and b1 to the current next frame */
+ to_next[0] = bi0 = from[0];
+ to_next[1] = bi1 = from[1];
+ from += 2;
+ to_next += 2;
+ n_left_from -= 2;
+ n_left_to_next -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ /* $$$$$ Dual loop: process 2 x packets here $$$$$ */
+ ASSERT (b0->current_data == 0);
+ ASSERT (b1->current_data == 0);
+
+ en0 = vlib_buffer_get_current (b0);
+ en1 = vlib_buffer_get_current (b1);
+
+ sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
+
+ /* Send pkt back out the RX interface */
+ vnet_buffer(b0)->sw_if_index[VLIB_TX] = sw_if_index0;
+ vnet_buffer(b1)->sw_if_index[VLIB_TX] = sw_if_index1;
+
+ /* $$$$$ End of processing 2 x packets $$$$$ */
+
+ if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)))
+ {
+ if (b0->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ li_hit_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ }
+ if (b1->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ li_hit_trace_t *t =
+ vlib_add_trace (vm, node, b1, sizeof (*t));
+ t->sw_if_index = sw_if_index1;
+ t->next_index = next1;
+ }
+ }
+
+ /* verify speculative enqueues, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
+#endif /* $$$ dual-loop off */
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t * b0;
+ vlib_buffer_t * c0;
+ ip4_udp_header_t * iu0;
+ ip4_header_t * ip0;
+ udp_header_t * udp0;
+ u32 next0 = LI_HIT_NEXT_ETHERNET;
+
+ /* speculatively enqueue b0 to the current next frame */
+ 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);
+ if (PREDICT_TRUE(to_int_next != 0))
+ {
+ /* Make an intercept copy */
+ c0 = vlib_buffer_copy (vm, b0);
+
+ vlib_buffer_advance(c0, -sizeof(*iu0));
+
+ iu0 = vlib_buffer_get_current(c0);
+ ip0 = &iu0->ip4;
+
+ ip0->ip_version_and_header_length = 0x45;
+ ip0->ttl = 254;
+ ip0->protocol = IP_PROTOCOL_UDP;
+
+ ip0->src_address.as_u32 = lm->src_addrs[0].as_u32;
+ ip0->dst_address.as_u32 = lm->collectors[0].as_u32;
+ ip0->length = vlib_buffer_length_in_chain (vm, c0);
+ ip0->checksum = ip4_header_checksum (ip0);
+
+ udp0 = &iu0->udp;
+ udp0->src_port = udp0->dst_port =
+ clib_host_to_net_u16(lm->ports[0]);
+ udp0->checksum = 0;
+ udp0->length =
+ clib_net_to_host_u16 (vlib_buffer_length_in_chain (vm , b0));
+
+ to_int_next [0] = vlib_get_buffer_index (vm, c0);
+ to_int_next++;
+ }
+
+ if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ li_hit_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->next_index = next0;
+ }
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ 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);
+ }
+
+ if (int_frame)
+ {
+ int_frame->n_vectors = frame->n_vectors;
+ vlib_put_frame_to_node (vm, ip4_lookup_node.index, int_frame);
+ }
+
+ vlib_node_increment_counter (vm, li_hit_node.index,
+ LI_HIT_ERROR_HITS, frame->n_vectors);
+ return frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (li_hit_node) = {
+ .function = li_hit_node_fn,
+ .name = "li-hit",
+ .vector_size = sizeof (u32),
+ .format_trace = format_li_hit_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(li_hit_error_strings),
+ .error_strings = li_hit_error_strings,
+
+ .n_next_nodes = LI_HIT_N_NEXT,
+
+ /* edit / add dispositions here */
+ .next_nodes = {
+ [LI_HIT_NEXT_ETHERNET] = "ethernet-input-not-l2",
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (li_hit_node, li_hit_node_fn)
+
Code Review / vpp.git / blobdiff