1 files changed, 54 insertions, 0 deletions
diff --git a/package/ead/src/pfc.c b/package/ead/src/pfc.c
new file mode 100644
index 0000000..402e37f
--- /dev/null
+++ b/package/ead/src/pfc.c
@@ -0,0 +1,54 @@
+/*
+ * Small pcap precompiler
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <string.h>
+#include <stdlib.h>
+#include <pcap.h>
+
+int main (int argc, char ** argv)
+{
+	struct bpf_program filter;
+	pcap_t *pc;
+	int i;
+
+	if (argc != 2)
+	{
+		printf ("Usage: %s <expression>\n", argv[0]);
+		return 1;
+	}
+
+	pc = pcap_open_dead(DLT_EN10MB, 1500);
+	if (pcap_compile(pc, &filter, argv[1], 1, 0) != 0) {
+		printf("error in active-filter expression: %s\n", pcap_geterr(pc));
+		return 1;
+	}
+
+	printf("/* precompiled expression: %s */\n\n"
+		"static struct bpf_insn pktfilter_insns[] = {\n",
+		argv[1]);
+
+	for (i = 0; i < filter.bf_len; i++) {
+		struct bpf_insn *in = &filter.bf_insns[i];
+		printf("\t{ .code = 0x%04x, .jt = 0x%02x, .jf = 0x%02x, .k = 0x%08x },\n", in->code, in->jt, in->jf, in->k);
+	}
+	printf("};\n\n"
+		"static struct bpf_program pktfilter = {\n"
+		"\t.bf_len = %d,\n"
+		"\t.bf_insns = pktfilter_insns,\n"
+		"};\n", filter.bf_len);
+	return 0;
+
+}