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/*
* Copyright (C) 2020 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 <android-base/logging.h>
#include <android-base/properties.h>
#include <android-base/strings.h>
#include <android-base/unique_fd.h>
#include <arpa/inet.h>
#include <ifaddrs.h>
#include <linux/if.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/types.h>
#include "recovery_ui/device.h"
#include "recovery_ui/ethernet_device.h"
#include "recovery_ui/ethernet_ui.h"
// Android TV defaults to eth0 for it's interface
EthernetDevice::EthernetDevice(EthernetRecoveryUI* ui) : EthernetDevice(ui, "eth0") {}
// Allow future users to define the interface as they prefer
EthernetDevice::EthernetDevice(EthernetRecoveryUI* ui, std::string interface)
: Device(ui), ctl_sock_(socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0)), interface_(interface) {
if (ctl_sock_ < 0) {
PLOG(ERROR) << "Failed to open socket";
}
}
void EthernetDevice::PreRecovery() {
SetInterfaceFlags(0, IFF_UP);
SetTitleIPv6LinkLocalAddress(false);
}
void EthernetDevice::PreFastboot() {
android::base::SetProperty("fastbootd.protocol", "tcp");
if (SetInterfaceFlags(IFF_UP, 0) < 0) {
LOG(ERROR) << "Failed to bring up interface";
return;
}
SetTitleIPv6LinkLocalAddress(true);
}
int EthernetDevice::SetInterfaceFlags(const unsigned set, const unsigned clr) {
struct ifreq ifr;
if (ctl_sock_ < 0) {
return -1;
}
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifr.ifr_name, interface_.c_str(), IFNAMSIZ);
ifr.ifr_name[IFNAMSIZ - 1] = 0;
if (ioctl(ctl_sock_, SIOCGIFFLAGS, &ifr) < 0) {
PLOG(ERROR) << "Failed to get interface active flags";
return -1;
}
ifr.ifr_flags = (ifr.ifr_flags & (~clr)) | set;
if (ioctl(ctl_sock_, SIOCSIFFLAGS, &ifr) < 0) {
PLOG(ERROR) << "Failed to set interface active flags";
return -1;
}
return 0;
}
void EthernetDevice::SetTitleIPv6LinkLocalAddress(const bool interface_up) {
auto recovery_ui = reinterpret_cast<EthernetRecoveryUI*>(GetUI());
if (!interface_up) {
recovery_ui->SetIPv6LinkLocalAddress();
return;
}
struct ifaddrs* ifaddr;
if (getifaddrs(&ifaddr) == -1) {
PLOG(ERROR) << "Failed to get interface addresses";
recovery_ui->SetIPv6LinkLocalAddress();
return;
}
std::unique_ptr<struct ifaddrs, decltype(&freeifaddrs)> guard{ ifaddr, freeifaddrs };
for (struct ifaddrs* ifa = ifaddr; ifa != nullptr; ifa = ifa->ifa_next) {
if (ifa->ifa_addr->sa_family != AF_INET6 || interface_ != ifa->ifa_name) {
continue;
}
auto current_addr = reinterpret_cast<struct sockaddr_in6*>(ifa->ifa_addr);
if (!IN6_IS_ADDR_LINKLOCAL(&(current_addr->sin6_addr))) {
continue;
}
char addrstr[INET6_ADDRSTRLEN];
inet_ntop(AF_INET6, reinterpret_cast<const void*>(¤t_addr->sin6_addr), addrstr,
INET6_ADDRSTRLEN);
LOG(INFO) << "Our IPv6 link-local address is " << addrstr;
recovery_ui->SetIPv6LinkLocalAddress(addrstr);
return;
}
recovery_ui->SetIPv6LinkLocalAddress();
}
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