shared: add minimal firewall manipulation helpers for establishing NAT rules, using libiptc

1 files changed, 60 insertions, 0 deletions

diff --git a/src/test/test-fw-util.c b/src/test/test-fw-util.c
new file mode 100644
index 0000000000..ab891aa0c4
--- /dev/null
+++ b/src/test/test-fw-util.c
@@ -0,0 +1,60 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2015 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "log.h"
+#include "fw-util.h"
+
+#define MAKE_IN_ADDR_UNION(a,b,c,d) (union in_addr_union) { .in.s_addr = htobe32((uint32_t) (a) << 24 | (uint32_t) (b) << 16 | (uint32_t) (c) << 8 | (uint32_t) (d))}
+
+int main(int argc, char *argv[]) {
+        int r;
+        log_set_max_level(LOG_DEBUG);
+
+        r = fw_add_masquerade(true, AF_INET, 0, NULL, 0, "foobar", NULL, 0);
+        if (r < 0)
+                log_error_errno(r, "Failed to modify firewall: %m");
+
+        r = fw_add_masquerade(true, AF_INET, 0, NULL, 0, "foobar", NULL, 0);
+        if (r < 0)
+                log_error_errno(r, "Failed to modify firewall: %m");
+
+        r = fw_add_masquerade(false, AF_INET, 0, NULL, 0, "foobar", NULL, 0);
+        if (r < 0)
+                log_error_errno(r, "Failed to modify firewall: %m");
+
+        r = fw_add_local_dnat(true, AF_INET, IPPROTO_TCP, NULL, NULL, 0, NULL, 0, 4711, &MAKE_IN_ADDR_UNION(1, 2, 3, 4), 815, NULL);
+        if (r < 0)
+                log_error_errno(r, "Failed to modify firewall: %m");
+
+        r = fw_add_local_dnat(true, AF_INET, IPPROTO_TCP, NULL, NULL, 0, NULL, 0, 4711, &MAKE_IN_ADDR_UNION(1, 2, 3, 4), 815, NULL);
+        if (r < 0)
+                log_error_errno(r, "Failed to modify firewall: %m");
+
+        r = fw_add_local_dnat(true, AF_INET, IPPROTO_TCP, NULL, NULL, 0, NULL, 0, 4711, &MAKE_IN_ADDR_UNION(1, 2, 3, 5), 815, &MAKE_IN_ADDR_UNION(1, 2, 3, 4));
+        if (r < 0)
+                log_error_errno(r, "Failed to modify firewall: %m");
+
+        r = fw_add_local_dnat(false, AF_INET, IPPROTO_TCP, NULL, NULL, 0, NULL, 0, 4711, &MAKE_IN_ADDR_UNION(1, 2, 3, 5), 815, NULL);
+        if (r < 0)
+                log_error_errno(r, "Failed to modify firewall: %m");
+
+        return 0;
+}