| /* |
| * 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."); |
| } |
| } |
| } |