1 /*
2 * Copyright (C) 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <OffloadControlTestUtils.h>
18 #include <android-base/unique_fd.h>
19
20 using android::base::unique_fd;
21
asSockaddr(const sockaddr_nl * nladdr)22 inline const sockaddr* asSockaddr(const sockaddr_nl* nladdr) {
23 return reinterpret_cast<const sockaddr*>(nladdr);
24 }
25
conntrackSocket(unsigned groups)26 int conntrackSocket(unsigned groups) {
27 unique_fd s(socket(AF_NETLINK, SOCK_DGRAM, NETLINK_NETFILTER));
28 if (s.get() < 0) {
29 return -errno;
30 }
31
32 const struct sockaddr_nl bind_addr = {
33 .nl_family = AF_NETLINK,
34 .nl_pad = 0,
35 .nl_pid = 0,
36 .nl_groups = groups,
37 };
38 if (::bind(s.get(), asSockaddr(&bind_addr), sizeof(bind_addr)) < 0) {
39 return -errno;
40 }
41
42 const struct sockaddr_nl kernel_addr = {
43 .nl_family = AF_NETLINK,
44 .nl_pad = 0,
45 .nl_pid = 0,
46 .nl_groups = groups,
47 };
48 if (connect(s.get(), asSockaddr(&kernel_addr), sizeof(kernel_addr)) != 0) {
49 return -errno;
50 }
51
52 return s.release();
53 }