85 lines
2.5 KiB
C++
85 lines
2.5 KiB
C++
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "FwmarkClient.h"
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#include "netd_client/FwmarkCommands.h"
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#include <sys/socket.h>
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#include <unistd.h>
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namespace {
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int closeFdAndRestoreErrno(int fd) {
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int error = errno;
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close(fd);
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errno = error;
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return -1;
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}
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typedef int (*ConnectFunctionType)(int, const sockaddr*, socklen_t);
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typedef int (*AcceptFunctionType)(int, sockaddr*, socklen_t*);
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ConnectFunctionType libcConnect = 0;
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AcceptFunctionType libcAccept = 0;
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int netdClientConnect(int sockfd, const sockaddr* addr, socklen_t addrlen) {
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if (FwmarkClient::shouldSetFwmark(sockfd, addr)) {
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char data[] = {FWMARK_COMMAND_ON_CONNECT};
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if (!FwmarkClient().send(data, sizeof(data), sockfd)) {
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return -1;
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}
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}
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return libcConnect(sockfd, addr, addrlen);
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}
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int netdClientAccept(int sockfd, sockaddr* addr, socklen_t* addrlen) {
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int acceptedSocket = libcAccept(sockfd, addr, addrlen);
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if (acceptedSocket == -1) {
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return -1;
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}
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sockaddr socketAddress;
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if (!addr) {
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socklen_t socketAddressLen = sizeof(socketAddress);
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if (getsockname(acceptedSocket, &socketAddress, &socketAddressLen) == -1) {
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return closeFdAndRestoreErrno(acceptedSocket);
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}
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addr = &socketAddress;
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}
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if (FwmarkClient::shouldSetFwmark(acceptedSocket, addr)) {
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char data[] = {FWMARK_COMMAND_ON_ACCEPT};
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if (!FwmarkClient().send(data, sizeof(data), acceptedSocket)) {
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return closeFdAndRestoreErrno(acceptedSocket);
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}
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}
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return acceptedSocket;
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}
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} // namespace
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extern "C" void netdClientInitConnect(ConnectFunctionType* function) {
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if (function && *function) {
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libcConnect = *function;
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*function = netdClientConnect;
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}
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}
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extern "C" void netdClientInitAccept(AcceptFunctionType* function) {
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if (function && *function) {
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libcAccept = *function;
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*function = netdClientAccept;
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}
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}
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