From 7c305841e68d39f19ee5c0093fdfc8ca2e65e215 Mon Sep 17 00:00:00 2001
From: netblue30 <netblue30@yahoo.com>
Date: Mon, 13 Nov 2017 11:04:40 -0500
Subject: netfilter split

---
 src/fnetfilter/main.c | 115 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 src/fnetfilter/main.c

(limited to 'src/fnetfilter/main.c')

diff --git a/src/fnetfilter/main.c b/src/fnetfilter/main.c
new file mode 100644
index 000000000..67ab31832
--- /dev/null
+++ b/src/fnetfilter/main.c
@@ -0,0 +1,115 @@
+ /*
+ * Copyright (C) 2014-2017 Firejail Authors
+ *
+ * This file is part of firejail project
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+#include "../include/common.h"
+
+#define MAXBUF 4098
+int arg_quiet = 0;
+
+static char *default_filter =
+"*filter\n"
+":INPUT DROP [0:0]\n"
+":FORWARD DROP [0:0]\n"
+":OUTPUT ACCEPT [0:0]\n"
+"-A INPUT -i lo -j ACCEPT\n"
+"-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT\n"
+"# echo replay is handled by -m state RELATED/ESTABLISHED below\n"
+"#-A INPUT -p icmp --icmp-type echo-reply -j ACCEPT\n"
+"-A INPUT -p icmp --icmp-type destination-unreachable -j ACCEPT\n"
+"-A INPUT -p icmp --icmp-type time-exceeded -j ACCEPT\n"
+"-A INPUT -p icmp --icmp-type echo-request -j ACCEPT \n"
+"# disable STUN\n"
+"-A OUTPUT -p udp --dport 3478 -j DROP\n"
+"-A OUTPUT -p udp --dport 3479 -j DROP\n"
+"-A OUTPUT -p tcp --dport 3478 -j DROP\n"
+"-A OUTPUT -p tcp --dport 3479 -j DROP\n"
+"COMMIT\n";
+
+static void usage(void) {
+	printf("Usage:\n");
+	printf("\tfnetfilter netfilter-command destination-file\n");
+}
+
+int main(int argc, char **argv) {
+#if 0
+{
+system("cat /proc/self/status");
+int i;
+for (i = 0; i < argc; i++)
+	printf("*%s* ", argv[i]);
+printf("\n");
+}
+#endif
+
+	char *quiet = getenv("FIREJAIL_QUIET");
+	if (quiet && strcmp(quiet, "yes") == 0)
+		arg_quiet = 1;
+
+	if (strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-?") ==0) {
+		usage();
+		return 0;
+	}
+
+	if (argc != 2 && argc != 3) {
+		usage();
+		return 1;
+	}
+
+	char *destfile = (argc == 3)? argv[2]: argv[1];
+	char *command = (argc == 3)? argv[1]: NULL;	
+//printf("command %s\n", command);
+//printf("destfile %s\n", destfile);
+
+	// handle default config (command = NULL, destfile)
+	if (command == NULL) {
+		// create a default filter file
+		FILE *fp = fopen(destfile, "w");
+		if (!fp) {
+			fprintf(stderr, "Error fnetfilter: cannot open %s\n", destfile);
+			exit(1);
+		}
+		fprintf(fp, "%s\n", default_filter);
+		fclose(fp);
+	}
+	else {
+		// copy the file
+		FILE *fp1 = fopen(command, "r");
+		if (!fp1) {
+			fprintf(stderr, "Error fnetfilter: cannot open %s\n", command);
+			exit(1);
+		}
+
+		FILE *fp2 = fopen(destfile, "w");
+		if (!fp2) {
+			fprintf(stderr, "Error fnetfilter: cannot open %s\n", destfile);
+			exit(1);
+		}
+		
+		char buf[MAXBUF];
+		while (fgets(buf, MAXBUF, fp1))
+			fprintf(fp2, "%s", buf);
+
+		fclose(fp1);
+		fclose(fp2);
+	}
+	
+
+printf("fnetfilter running\n");
+	return 0;
+}
-- 
cgit v1.2.3-54-g00ecf