1 files changed, 116 insertions, 0 deletions
diff --git a/src/bpfswitch/usrc/xdp_dummy_user.c b/src/bpfswitch/usrc/xdp_dummy_user.c
new file mode 100644
index 00000000..7741f330
--- /dev/null
+++ b/src/bpfswitch/usrc/xdp_dummy_user.c
@@ -0,0 +1,116 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/bpf.h>
+#include <linux/if_link.h>
+#include <linux/limits.h>
+#include <net/if.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <libgen.h>
+
+#include <bpf/bpf.h>
+#include <bpf/libbpf.h>
+
+#include "libbpf_helpers.h"
+
+static void usage(const char *prog)
+{
+	fprintf(stderr,
+		"usage: %s [OPTS] interface-list\n"
+		"\nOPTS:\n"
+		"    -d            detach program\n"
+		"    -f bpf-file   bpf filename to load\n"
+		"    -g            skb mode\n"
+		, prog);
+}
+
+int main(int argc, char **argv)
+{
+	int (*attach_fn)(int idx, int prog_fd, const char *dev) = attach_to_dev;
+	int (*detach_fn)(int idx, const char *dev) = detach_from_dev;
+	struct bpf_prog_load_attr prog_load_attr = { };
+	const char *objfile = "xdp_dummy_kern.o";
+	const char *pname = "xdp_dummy";
+	bool filename_set = false;
+	struct bpf_program *prog;
+	struct bpf_object *obj;
+	int opt, i, prog_fd;
+	bool attach = true;
+	int ret = 0;
+
+	while ((opt = getopt(argc, argv, ":df:g")) != -1) {
+		switch (opt) {
+		case 'f':
+			objfile = optarg;
+			filename_set = true;
+			break;
+		case 'd':
+			attach = false;
+			break;
+		case 'g':
+			attach_fn = attach_to_dev_generic;
+			detach_fn = detach_from_dev_generic;
+			break;
+		default:
+			usage(basename(argv[0]));
+			return 1;
+		}
+	}
+
+	if (optind == argc) {
+		usage(basename(argv[0]));
+		return 1;
+	}
+
+	if (!attach) {
+		for (i = optind; i < argc; ++i) {
+			int idx, err;
+
+			idx = if_nametoindex(argv[i]);
+			if (!idx)
+				idx = strtoul(argv[i], NULL, 0);
+
+			if (!idx) {
+				fprintf(stderr, "Invalid device argument\n");
+				return 1;
+			}
+			err = detach_fn(idx, argv[i]);
+			if (err)
+				ret = err;
+		}
+		return ret;
+	}
+
+	if (load_obj_file(&prog_load_attr, &obj, objfile, filename_set))
+                return 1;
+
+	prog = bpf_object__find_program_by_title(obj, pname);
+	prog_fd = bpf_program__fd(prog);
+	if (prog_fd < 0) {
+		printf("program not found: %s\n", strerror(prog_fd));
+		return 1;
+	}
+
+	for (i = optind; i < argc; ++i) {
+		int idx, err;
+
+		idx = if_nametoindex(argv[i]);
+		if (!idx)
+			idx = strtoul(argv[i], NULL, 0);
+
+		if (!idx) {
+			fprintf(stderr, "Invalid device argument\n");
+			return 1;
+		}
+
+		err = attach_fn(idx, prog_fd, argv[i]);
+		if (err)
+			ret = err;
+	}
+
+	return ret;
+}