1 files changed, 136 insertions, 0 deletions

diff --git a/recovery_ui/ethernet_device.cpp b/recovery_ui/ethernet_device.cpp
new file mode 100644
index 000000000..39ec65dc4
--- /dev/null
+++ b/recovery_ui/ethernet_device.cpp
@@ -0,0 +1,136 @@
+/*
+ * 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_ui.h"
+
+class EthernetDevice : public Device {
+ public:
+  explicit EthernetDevice(EthernetRecoveryUI* ui);
+
+  void PreRecovery() override;
+  void PreFastboot() override;
+
+ private:
+  int SetInterfaceFlags(const unsigned set, const unsigned clr);
+  void SetTitleIPv6LinkLocalAddress(const bool interface_up);
+
+  android::base::unique_fd ctl_sock_;
+  static const std::string interface;
+};
+
+const std::string EthernetDevice::interface = "eth0";
+
+EthernetDevice::EthernetDevice(EthernetRecoveryUI* ui)
+    : Device(ui), ctl_sock_(socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0)) {
+  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*>(&current_addr->sin6_addr), addrstr,
+              INET6_ADDRSTRLEN);
+    LOG(INFO) << "Our IPv6 link-local address is " << addrstr;
+    recovery_ui->SetIPv6LinkLocalAddress(addrstr);
+    return;
+  }
+
+  recovery_ui->SetIPv6LinkLocalAddress();
+}
+
+// -----------------------------------------------------------------------------------------
+Device* make_device() {
+  return new EthernetDevice(new EthernetRecoveryUI);
+}