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-rw-r--r--src/vnet/flow/flow_report.c502
1 files changed, 502 insertions, 0 deletions
diff --git a/src/vnet/flow/flow_report.c b/src/vnet/flow/flow_report.c
new file mode 100644
index 00000000..c78a78a9
--- /dev/null
+++ b/src/vnet/flow/flow_report.c
@@ -0,0 +1,502 @@
+/*
+ * 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.
+ */
+/*
+ * flow_report.c
+ */
+#include <vnet/flow/flow_report.h>
+#include <vnet/api_errno.h>
+
+flow_report_main_t flow_report_main;
+
+static_always_inline u8 stream_index_valid (u32 index)
+{
+ flow_report_main_t * frm = &flow_report_main;
+ return index < vec_len(frm->streams) &&
+ frm->streams[index].domain_id != ~0;
+}
+
+static_always_inline flow_report_stream_t * add_stream (void)
+{
+ flow_report_main_t * frm = &flow_report_main;
+ u32 i;
+ for (i = 0; i < vec_len(frm->streams); i++)
+ if (!stream_index_valid(i))
+ return &frm->streams[i];
+ u32 index = vec_len(frm->streams);
+ vec_validate(frm->streams, index);
+ return &frm->streams[index];
+}
+
+static_always_inline void delete_stream (u32 index)
+{
+ flow_report_main_t * frm = &flow_report_main;
+ ASSERT (index < vec_len(frm->streams));
+ ASSERT (frm->streams[index].domain_id != ~0);
+ frm->streams[index].domain_id = ~0;
+}
+
+static i32 find_stream (u32 domain_id, u16 src_port)
+{
+ flow_report_main_t * frm = &flow_report_main;
+ flow_report_stream_t * stream;
+ u32 i;
+ for (i = 0; i < vec_len(frm->streams); i++)
+ if (stream_index_valid(i)) {
+ stream = &frm->streams[i];
+ if (domain_id == stream->domain_id) {
+ if (src_port != stream->src_port)
+ return -2;
+ return i;
+ } else if (src_port == stream->src_port) {
+ return -2;
+ }
+ }
+ return -1;
+}
+
+int send_template_packet (flow_report_main_t *frm,
+ flow_report_t *fr,
+ u32 * buffer_indexp)
+{
+ u32 bi0;
+ vlib_buffer_t * b0;
+ ip4_ipfix_template_packet_t * tp;
+ ipfix_message_header_t * h;
+ ip4_header_t * ip;
+ udp_header_t * udp;
+ vlib_main_t * vm = frm->vlib_main;
+ flow_report_stream_t * stream;
+ vlib_buffer_free_list_t *fl;
+
+ ASSERT (buffer_indexp);
+
+ if (fr->update_rewrite || fr->rewrite == 0)
+ {
+ if (frm->ipfix_collector.as_u32 == 0
+ || frm->src_address.as_u32 == 0)
+ {
+ clib_warning ("no collector: disabling flow collector process");
+ vlib_node_set_state (frm->vlib_main, flow_report_process_node.index,
+ VLIB_NODE_STATE_DISABLED);
+ return -1;
+ }
+ vec_free (fr->rewrite);
+ fr->update_rewrite = 1;
+ }
+
+ if (fr->update_rewrite)
+ {
+ fr->rewrite = fr->rewrite_callback (frm, fr,
+ &frm->ipfix_collector,
+ &frm->src_address,
+ frm->collector_port);
+ fr->update_rewrite = 0;
+ }
+
+ if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
+ return -1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+ /* Initialize the buffer */
+ fl = vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
+ vlib_buffer_init_for_free_list (b0, fl);
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
+
+ ASSERT (vec_len (fr->rewrite) < VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES);
+
+ clib_memcpy (b0->data, fr->rewrite, vec_len (fr->rewrite));
+ b0->current_data = 0;
+ b0->current_length = vec_len (fr->rewrite);
+ b0->flags |= (VLIB_BUFFER_TOTAL_LENGTH_VALID | VLIB_BUFFER_FLOW_REPORT);
+ vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = frm->fib_index;
+
+ tp = vlib_buffer_get_current (b0);
+ ip = (ip4_header_t *) &tp->ip4;
+ udp = (udp_header_t *) (ip+1);
+ h = (ipfix_message_header_t *)(udp+1);
+
+ /* FIXUP: message header export_time */
+ h->export_time = (u32)
+ (((f64)frm->unix_time_0) +
+ (vlib_time_now(frm->vlib_main) - frm->vlib_time_0));
+ h->export_time = clib_host_to_net_u32(h->export_time);
+
+ stream = &frm->streams[fr->stream_index];
+
+ /* FIXUP: message header sequence_number. Templates do not increase it */
+ h->sequence_number = clib_host_to_net_u32(stream->sequence_number);
+
+ /* FIXUP: udp length */
+ udp->length = clib_host_to_net_u16 (b0->current_length - sizeof (*ip));
+
+ if (frm->udp_checksum)
+ {
+ /* RFC 7011 section 10.3.2. */
+ udp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip);
+ if (udp->checksum == 0)
+ udp->checksum = 0xffff;
+ }
+
+ *buffer_indexp = bi0;
+
+ fr->last_template_sent = vlib_time_now (vm);
+
+ return 0;
+}
+
+static uword
+flow_report_process (vlib_main_t * vm,
+ vlib_node_runtime_t * rt,
+ vlib_frame_t * f)
+{
+ flow_report_main_t * frm = &flow_report_main;
+ flow_report_t * fr;
+ u32 ip4_lookup_node_index;
+ vlib_node_t * ip4_lookup_node;
+ vlib_frame_t * nf = 0;
+ u32 template_bi;
+ u32 * to_next;
+ int send_template;
+ f64 now;
+ int rv;
+ uword event_type;
+ uword *event_data = 0;
+
+ /* Wait for Godot... */
+ vlib_process_wait_for_event_or_clock (vm, 1e9);
+ event_type = vlib_process_get_events (vm, &event_data);
+ if (event_type != 1)
+ clib_warning ("bogus kickoff event received, %d", event_type);
+ vec_reset_length (event_data);
+
+ /* Enqueue pkts to ip4-lookup */
+ ip4_lookup_node = vlib_get_node_by_name (vm, (u8 *) "ip4-lookup");
+ ip4_lookup_node_index = ip4_lookup_node->index;
+
+ while (1)
+ {
+ vlib_process_wait_for_event_or_clock (vm, 5.0);
+ event_type = vlib_process_get_events (vm, &event_data);
+ vec_reset_length (event_data);
+
+ vec_foreach (fr, frm->reports)
+ {
+ now = vlib_time_now (vm);
+
+ /* Need to send a template packet? */
+ send_template =
+ now > (fr->last_template_sent + frm->template_interval);
+ send_template += fr->last_template_sent == 0;
+ template_bi = ~0;
+ rv = 0;
+
+ if (send_template)
+ rv = send_template_packet (frm, fr, &template_bi);
+
+ if (rv < 0)
+ continue;
+
+ nf = vlib_get_frame_to_node (vm, ip4_lookup_node_index);
+ nf->n_vectors = 0;
+ to_next = vlib_frame_vector_args (nf);
+
+ if (template_bi != ~0)
+ {
+ to_next[0] = template_bi;
+ to_next++;
+ nf->n_vectors++;
+ }
+
+ nf = fr->flow_data_callback (frm, fr,
+ nf, to_next, ip4_lookup_node_index);
+ if (nf)
+ vlib_put_frame_to_node (vm, ip4_lookup_node_index, nf);
+ }
+ }
+
+ return 0; /* not so much */
+}
+
+VLIB_REGISTER_NODE (flow_report_process_node) = {
+ .function = flow_report_process,
+ .type = VLIB_NODE_TYPE_PROCESS,
+ .name = "flow-report-process",
+};
+
+int vnet_flow_report_add_del (flow_report_main_t *frm,
+ vnet_flow_report_add_del_args_t *a)
+{
+ int i;
+ int found_index = ~0;
+ flow_report_t *fr;
+ flow_report_stream_t * stream;
+ u32 si;
+
+ si = find_stream(a->domain_id, a->src_port);
+ if (si == -2)
+ return VNET_API_ERROR_INVALID_VALUE;
+ if (si == -1 && a->is_add == 0)
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+
+ for (i = 0; i < vec_len(frm->reports); i++)
+ {
+ fr = vec_elt_at_index (frm->reports, i);
+ if (fr->opaque.as_uword == a->opaque.as_uword
+ && fr->rewrite_callback == a->rewrite_callback
+ && fr->flow_data_callback == a->flow_data_callback)
+ {
+ found_index = i;
+ break;
+ }
+ }
+
+ if (a->is_add == 0)
+ {
+ if (found_index != ~0)
+ {
+ vec_delete (frm->reports, 1, found_index);
+ stream = &frm->streams[si];
+ stream->n_reports--;
+ if (stream->n_reports == 0)
+ delete_stream(si);
+ return 0;
+ }
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+ }
+
+ if (found_index != ~0)
+ return VNET_API_ERROR_VALUE_EXIST;
+
+ if (si == -1)
+ {
+ stream = add_stream();
+ stream->domain_id = a->domain_id;
+ stream->src_port = a->src_port;
+ stream->sequence_number = 0;
+ stream->n_reports = 0;
+ si = stream - frm->streams;
+ }
+ else
+ stream = &frm->streams[si];
+
+ stream->n_reports++;
+
+ vec_add2 (frm->reports, fr, 1);
+
+ fr->stream_index = si;
+ fr->template_id = 256 + stream->next_template_no;
+ stream->next_template_no = (stream->next_template_no + 1) % (65536 - 256);
+ fr->update_rewrite = 1;
+ fr->opaque = a->opaque;
+ fr->rewrite_callback = a->rewrite_callback;
+ fr->flow_data_callback = a->flow_data_callback;
+
+ return 0;
+}
+
+clib_error_t * flow_report_add_del_error_to_clib_error (int error)
+{
+ switch (error)
+ {
+ case 0:
+ return 0;
+ case VNET_API_ERROR_NO_SUCH_ENTRY:
+ return clib_error_return (0, "Flow report not found");
+ case VNET_API_ERROR_VALUE_EXIST:
+ return clib_error_return (0, "Flow report already exists");
+ case VNET_API_ERROR_INVALID_VALUE:
+ return clib_error_return (0, "Expecting either still unused values "
+ "for both domain_id and src_port "
+ "or already used values for both fields");
+ default:
+ return clib_error_return (0, "vnet_flow_report_add_del returned %d",
+ error);
+ }
+}
+
+void vnet_flow_reports_reset (flow_report_main_t * frm)
+{
+ flow_report_t *fr;
+ u32 i;
+
+ for (i = 0; i < vec_len(frm->streams); i++)
+ if (stream_index_valid(i))
+ frm->streams[i].sequence_number = 0;
+
+ vec_foreach (fr, frm->reports)
+ {
+ fr->update_rewrite = 1;
+ fr->last_template_sent = 0;
+ }
+}
+
+void vnet_stream_reset (flow_report_main_t * frm, u32 stream_index)
+{
+ flow_report_t *fr;
+
+ frm->streams[stream_index].sequence_number = 0;
+
+ vec_foreach (fr, frm->reports)
+ if (frm->reports->stream_index == stream_index) {
+ fr->update_rewrite = 1;
+ fr->last_template_sent = 0;
+ }
+}
+
+int vnet_stream_change (flow_report_main_t * frm,
+ u32 old_domain_id, u16 old_src_port,
+ u32 new_domain_id, u16 new_src_port)
+{
+ i32 stream_index = find_stream (old_domain_id, old_src_port);
+ if (stream_index < 0)
+ return 1;
+ flow_report_stream_t * stream = &frm->streams[stream_index];
+ stream->domain_id = new_domain_id;
+ stream->src_port = new_src_port;
+ if (old_domain_id != new_domain_id || old_src_port != new_src_port)
+ vnet_stream_reset (frm, stream_index);
+ return 0;
+}
+
+static clib_error_t *
+set_ipfix_exporter_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ flow_report_main_t * frm = &flow_report_main;
+ ip4_address_t collector, src;
+ u16 collector_port = UDP_DST_PORT_ipfix;
+ u32 fib_id;
+ u32 fib_index = ~0;
+
+ collector.as_u32 = 0;
+ src.as_u32 = 0;
+ u32 path_mtu = 512; // RFC 7011 section 10.3.3.
+ u32 template_interval = 20;
+ u8 udp_checksum = 0;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) {
+ if (unformat (input, "collector %U", unformat_ip4_address, &collector))
+ ;
+ else if (unformat (input, "port %u", &collector_port))
+ ;
+ else if (unformat (input, "src %U", unformat_ip4_address, &src))
+ ;
+ else if (unformat (input, "fib-id %u", &fib_id))
+ {
+ ip4_main_t * im = &ip4_main;
+ uword * p = hash_get (im->fib_index_by_table_id, fib_id);
+ if (! p)
+ return clib_error_return (0, "fib ID %d doesn't exist\n",
+ fib_id);
+ fib_index = p[0];
+ }
+ else if (unformat (input, "path-mtu %u", &path_mtu))
+ ;
+ else if (unformat (input, "template-interval %u", &template_interval))
+ ;
+ else if (unformat (input, "udp-checksum"))
+ udp_checksum = 1;
+ else
+ break;
+ }
+
+ if (collector.as_u32 == 0)
+ return clib_error_return (0, "collector address required");
+
+ if (src.as_u32 == 0)
+ return clib_error_return (0, "src address required");
+
+ if (path_mtu > 1450 /* vpp does not support fragmentation */)
+ return clib_error_return (0, "too big path-mtu value, maximum is 1450");
+
+ if (path_mtu < 68)
+ return clib_error_return (0, "too small path-mtu value, minimum is 68");
+
+ /* Reset report streams if we are reconfiguring IP addresses */
+ if (frm->ipfix_collector.as_u32 != collector.as_u32 ||
+ frm->src_address.as_u32 != src.as_u32 ||
+ frm->collector_port != collector_port)
+ vnet_flow_reports_reset(frm);
+
+ frm->ipfix_collector.as_u32 = collector.as_u32;
+ frm->collector_port = collector_port;
+ frm->src_address.as_u32 = src.as_u32;
+ frm->fib_index = fib_index;
+ frm->path_mtu = path_mtu;
+ frm->template_interval = template_interval;
+ frm->udp_checksum = udp_checksum;
+
+ vlib_cli_output (vm, "Collector %U, src address %U, "
+ "fib index %d, path MTU %u, "
+ "template resend interval %us, "
+ "udp checksum %s",
+ format_ip4_address, &frm->ipfix_collector,
+ format_ip4_address, &frm->src_address,
+ fib_index, path_mtu, template_interval,
+ udp_checksum ? "enabled" : "disabled");
+
+ /* Turn on the flow reporting process */
+ vlib_process_signal_event (vm, flow_report_process_node.index,
+ 1, 0);
+ return 0;
+}
+
+VLIB_CLI_COMMAND (set_ipfix_exporter_command, static) = {
+ .path = "set ipfix exporter",
+ .short_help = "set ipfix exporter "
+ "collector <ip4-address> [port <port>] "
+ "src <ip4-address> [fib-id <fib-id>] "
+ "[path-mtu <path-mtu>] "
+ "[template-interval <template-interval>]",
+ "[udp-checksum]",
+ .function = set_ipfix_exporter_command_fn,
+};
+
+
+static clib_error_t *
+ipfix_flush_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ /* poke the flow reporting process */
+ vlib_process_signal_event (vm, flow_report_process_node.index,
+ 1, 0);
+ return 0;
+}
+
+VLIB_CLI_COMMAND (ipfix_flush_command, static) = {
+ .path = "ipfix flush",
+ .short_help = "flush the current ipfix data [for make test]",
+ .function = ipfix_flush_command_fn,
+};
+
+static clib_error_t *
+flow_report_init (vlib_main_t *vm)
+{
+ flow_report_main_t * frm = &flow_report_main;
+
+ frm->vlib_main = vm;
+ frm->vnet_main = vnet_get_main();
+ frm->unix_time_0 = time(0);
+ frm->vlib_time_0 = vlib_time_now(frm->vlib_main);
+ frm->fib_index = ~0;
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (flow_report_init)