bpf_trace_filter: plugin for BPF Trace Filtering

Change-Id: I342de0a375b783725aa2b621c1c70bc8bf646450
Signed-off-by: Mohammed Hawari <mohammed@hawari.fr>
Type: improvement

1 files changed, 68 insertions, 0 deletions

diff --git a/src/plugins/bpf_trace_filter/cli.c b/src/plugins/bpf_trace_filter/cli.c
new file mode 100644
index 00000000000..906ca71d5f3
--- /dev/null
+++ b/src/plugins/bpf_trace_filter/cli.c
@@ -0,0 +1,68 @@
+/*
+ *------------------------------------------------------------------
+ * Copyright (c) 2023 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 <stdint.h>
+#include <net/if.h>
+#include <sys/ioctl.h>
+#include <inttypes.h>
+
+#include <vlib/vlib.h>
+#include <bpf_trace_filter/bpf_trace_filter.h>
+#include <pcap.h>
+
+static clib_error_t *
+set_bpf_trace_filter_command_fn (vlib_main_t *vm, unformat_input_t *input,
+				 vlib_cli_command_t *cmd)
+{
+  unformat_input_t _line_input, *line_input = &_line_input;
+  u8 *bpf_expr = 0;
+  u8 is_del = 0;
+  clib_error_t *err = 0;
+
+  /* Get a line of input. */
+  if (!unformat_user (input, unformat_line_input, line_input))
+    return 0;
+
+  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (line_input, "del"))
+	is_del = 1;
+      else if (unformat (line_input, "%s", &bpf_expr))
+	;
+      else
+	return clib_error_return (0, "unknown input `%U'",
+				  format_unformat_error, input);
+    }
+
+  err = bpf_trace_filter_set_unset ((char *) bpf_expr, is_del);
+  unformat_free (line_input);
+
+  return err;
+}
+
+VLIB_CLI_COMMAND (set_bpf_trace_filter, static) = {
+  .path = "set bpf trace filter",
+  .short_help = "set bpf trace filter {<pcap string>}",
+  .function = set_bpf_trace_filter_command_fn,
+};
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */