summaryrefslogtreecommitdiffstats
path: root/src/vnet/lawful-intercept
diff options
context:
space:
mode:
Diffstat (limited to 'src/vnet/lawful-intercept')
-rw-r--r--src/vnet/lawful-intercept/lawful_intercept.c112
-rw-r--r--src/vnet/lawful-intercept/lawful_intercept.h45
-rw-r--r--src/vnet/lawful-intercept/node.c275
3 files changed, 432 insertions, 0 deletions
diff --git a/src/vnet/lawful-intercept/lawful_intercept.c b/src/vnet/lawful-intercept/lawful_intercept.c
new file mode 100644
index 00000000000..ef07a339201
--- /dev/null
+++ b/src/vnet/lawful-intercept/lawful_intercept.c
@@ -0,0 +1,112 @@
+/*
+ * 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 <vnet/lawful-intercept/lawful_intercept.h>
+
+static clib_error_t *
+set_li_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ li_main_t * lm = &li_main;
+ ip4_address_t collector;
+ u8 collector_set = 0;
+ ip4_address_t src;
+ u8 src_set = 0;
+ u32 tmp;
+ u16 udp_port = 0;
+ u8 is_add = 1;
+ int i;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) {
+ if (unformat (input, "collector %U", unformat_ip4_address, &collector))
+ collector_set = 1;
+ if (unformat (input, "src %U", unformat_ip4_address, &src))
+ src_set = 1;
+ else if (unformat (input, "udp-port %d", &tmp))
+ udp_port = tmp;
+ else if (unformat (input, "del"))
+ is_add = 0;
+ else
+ break;
+ }
+
+ if (collector_set == 0)
+ return clib_error_return (0, "collector must be set...");
+ if (src_set == 0)
+ return clib_error_return (0, "src must be set...");
+ if (udp_port == 0)
+ return clib_error_return (0, "udp-port must be set...");
+
+ if (is_add == 1)
+ {
+ for (i = 0; i < vec_len (lm->collectors); i++)
+ {
+ if (lm->collectors[i].as_u32 == collector.as_u32)
+ {
+ if (lm->ports[i] == udp_port)
+ return clib_error_return
+ (0, "collector %U:%d already configured",
+ &collector, udp_port);
+ else
+ return clib_error_return
+ (0, "collector %U already configured with port %d",
+ &collector, (int)(lm->ports[i]));
+ }
+ }
+ vec_add1 (lm->collectors, collector);
+ vec_add1 (lm->ports, udp_port);
+ vec_add1 (lm->src_addrs, src);
+ return 0;
+ }
+ else
+ {
+ for (i = 0; i < vec_len (lm->collectors); i++)
+ {
+ if ((lm->collectors[i].as_u32 == collector.as_u32)
+ && lm->ports[i] == udp_port)
+ {
+ vec_delete (lm->collectors, 1, i);
+ vec_delete (lm->ports, 1, i);
+ vec_delete (lm->src_addrs, 1, i);
+ return 0;
+ }
+ }
+ return clib_error_return (0, "collector %U:%d not configured",
+ &collector, udp_port);
+ }
+ return 0;
+}
+
+VLIB_CLI_COMMAND (set_li_command, static) = {
+ .path = "set li",
+ .short_help =
+ "set li src <ip4-address> collector <ip4-address> udp-port <nnnn>",
+ .function = set_li_command_fn,
+};
+
+static clib_error_t *
+li_init (vlib_main_t * vm)
+{
+ li_main_t * lm = &li_main;
+
+ lm->vlib_main = vm;
+ lm->vnet_main = vnet_get_main();
+ lm->hit_node_index = li_hit_node.index;
+ return 0;
+}
+
+VLIB_INIT_FUNCTION(li_init);
+
diff --git a/src/vnet/lawful-intercept/lawful_intercept.h b/src/vnet/lawful-intercept/lawful_intercept.h
new file mode 100644
index 00000000000..89e699f51a0
--- /dev/null
+++ b/src/vnet/lawful-intercept/lawful_intercept.h
@@ -0,0 +1,45 @@
+/*
+ * 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.
+ */
+
+#ifndef __lawful_intercept_h__
+#define __lawful_intercept_h__
+
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+
+typedef struct {
+ /* LI collector info */
+ ip4_address_t * src_addrs;
+ ip4_address_t * collectors;
+ u16 * ports;
+
+ /* Hit node index */
+ u32 hit_node_index;
+
+ /* convenience */
+ vlib_main_t * vlib_main;
+ vnet_main_t * vnet_main;
+} li_main_t;
+
+li_main_t li_main;
+
+typedef CLIB_PACKED(struct {
+ ip4_header_t ip4;
+ udp_header_t udp;
+}) ip4_udp_header_t;
+
+extern vlib_node_registration_t li_hit_node;
+
+#endif /* __lawful_intercept_h__ */
diff --git a/src/vnet/lawful-intercept/node.c b/src/vnet/lawful-intercept/node.c
new file mode 100644
index 00000000000..ea0cd8efcdd
--- /dev/null
+++ b/src/vnet/lawful-intercept/node.c
@@ -0,0 +1,275 @@
+/*
+ * 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)
+