blob: 39a628561c6680eed2e9bfdf4c3859a9d857467b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <string>
#define LOG_TAG "OemIptablesHook"
#include <log/log.h>
#include "NetdConstants.h"
namespace {
const char OEM_SCRIPT_PATH[] = "/system/bin/oem-iptables-init.sh";
bool oemCleanupHooks() {
static const std::string cmd4 =
"*filter\n"
":oem_out -\n"
":oem_fwd -\n"
"COMMIT\n"
"*nat\n"
":oem_nat_pre -\n"
"COMMIT\n";
static const std::string cmd6 =
"*filter\n"
":oem_out -\n"
":oem_fwd -\n"
"COMMIT\n";
return (execIptablesRestore(V4, cmd4) == 0 && execIptablesRestore(V6, cmd6) == 0);
}
bool oemInitChains() {
int ret = system(OEM_SCRIPT_PATH); // NOLINT(cert-env33-c)
if ((-1 == ret) || (0 != WEXITSTATUS(ret))) {
ALOGE("%s failed: %s", OEM_SCRIPT_PATH, strerror(errno));
oemCleanupHooks();
return false;
}
return true;
}
} // namespace
void setupOemIptablesHook() {
if (0 == access(OEM_SCRIPT_PATH, R_OK | X_OK)) {
// The call to oemCleanupHooks() is superfluous when done on bootup,
// but is needed for the case where netd has crashed/stopped and is
// restarted.
if (oemCleanupHooks() && oemInitChains()) {
ALOGI("OEM iptable hook installed.");
}
}
}
|
