1 files changed, 132 insertions, 0 deletions
diff --git a/bpfc.c b/bpfc.c
new file mode 100644
index 0000000..53ad5b3
--- /dev/null
+++ b/bpfc.c
@@ -0,0 +1,132 @@
+/*
+ * netsniff-ng - the packet sniffing beast
+ * Copyright 2011 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,
+ * Swiss federal institute of technology (ETH Zurich)
+ * Subject to the GPL, version 2.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <sys/fsuid.h>
+
+#include "xmalloc.h"
+#include "xutils.h"
+#include "die.h"
+#include "bpf.h"
+
+static const char *short_options = "vhi:VdbD";
+static const struct option long_options[] = {
+	{"input",	required_argument,	NULL, 'i'},
+	{"verbose",	no_argument,		NULL, 'V'},
+	{"decimal",	no_argument,		NULL, 'D'},
+	{"bypass",	no_argument,		NULL, 'b'},
+	{"dump",	no_argument,		NULL, 'd'},
+	{"version",	no_argument,		NULL, 'v'},
+	{"help",	no_argument,		NULL, 'h'},
+	{NULL, 0, NULL, 0}
+};
+
+extern int compile_filter(char *file, int verbose, int bypass, int decimal);
+
+static void help(void)
+{
+	printf("\nbpfc %s, a tiny BPF compiler\n", VERSION_STRING);
+	puts("http://www.netsniff-ng.org\n\n"
+	     "Usage: bpfc [options] || bpfc <program>\n"
+	     "Options:\n"
+	     "  -i|--input <program/->  Berkeley Packet Filter file/stdin\n"
+	     "  -D|--decimal            Decimal output, e.g. for xt_bpf\n"
+	     "  -V|--verbose            Be more verbose\n"
+	     "  -b|--bypass             Bypass filter validation (e.g. for bug testing)\n"
+	     "  -d|--dump               Dump supported instruction table\n"
+	     "  -v|--version            Print version\n"
+	     "  -h|--help               Print this help\n\n"
+	     "Examples:\n"
+	     "  bpfc fubar\n"
+	     "  bpfc -Dbi fubar\n"
+	     "  bpfc -   (read from stdin)\n\n"
+	     "Please report bugs to <bugs@netsniff-ng.org>\n"
+	     "Copyright (C) 2011-2013 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,\n"
+	     "Swiss federal institute of technology (ETH Zurich)\n"
+	     "License: GNU GPL version 2.0\n"
+	     "This is free software: you are free to change and redistribute it.\n"
+	     "There is NO WARRANTY, to the extent permitted by law.\n");
+	die();
+}
+
+static void version(void)
+{
+	printf("\nbpfc %s, a tiny BPF compiler\n", VERSION_STRING);
+	puts("http://www.netsniff-ng.org\n\n"
+	     "Please report bugs to <bugs@netsniff-ng.org>\n"
+	     "Copyright (C) 2011-2013 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,\n"
+	     "Swiss federal institute of technology (ETH Zurich)\n"
+	     "License: GNU GPL version 2.0\n"
+	     "This is free software: you are free to change and redistribute it.\n"
+	     "There is NO WARRANTY, to the extent permitted by law.\n");
+	die();
+}
+
+int main(int argc, char **argv)
+{
+	int ret, verbose = 0, c, opt_index, bypass = 0, decimal = 0;
+	char *file = NULL;
+
+	setfsuid(getuid());
+	setfsgid(getgid());
+
+	if (argc == 1)
+		help();
+
+	while ((c = getopt_long(argc, argv, short_options,
+			        long_options, &opt_index)) != EOF) {
+		switch (c) {
+		case 'h':
+			help();
+			break;
+		case 'v':
+			version();
+			break;
+		case 'V':
+			verbose = 1;
+			break;
+		case 'D':
+			decimal = 1;
+			break;
+		case 'b':
+			bypass = 1;
+			break;
+		case 'd':
+			bpf_dump_op_table();
+			die();
+		case 'i':
+			file = xstrdup(optarg);
+			break;
+		case '?':
+			switch (optopt) {
+			case 'i':
+				panic("Option -%c requires an argument!\n",
+				      optopt);
+			default:
+				if (isprint(optopt))
+					printf("Unknown option character `0x%X\'!\n", optopt);
+				die();
+			}
+		default:
+			break;
+		}
+	}
+
+	if (argc == 2)
+		file = xstrdup(argv[1]);
+	if (!file)
+		panic("No Berkeley Packet Filter program specified!\n");
+
+	ret = compile_filter(file, verbose, bypass, decimal);
+
+	xfree(file);
+	return ret;
+}