all: import netsniff-ng 0.5.8-rc0 source

We decided to get rid of the old Git history and start a new one for
several reasons:

 *) Allow / enforce only high-quality commits (which was not the case
    for many commits in the history), have a policy that is more close
    to the one from the Linux kernel. With high quality commits, we
    mean code that is logically split into commits and commit messages
    that are signed-off and have a proper subject and message body.
    We do not allow automatic Github merges anymore, since they are
    total bullshit. However, we will either cherry-pick your patches
    or pull them manually.

 *) The old archive was about ~27MB for no particular good reason.
    This basically derived from the bad decision that also some PDF
    files where stored there. From this moment onwards, no binary
    objects are allowed to be stored in this repository anymore.

The old archive is not wiped away from the Internet. You will still
be able to find it, e.g. on git.cryptoism.org etc.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

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;
+}