1 /*
2 * Copyright (C) 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <android-base/logging.h>
18 #include <android-base/properties.h>
19 #include <android-base/strings.h>
20 #include <android-base/unique_fd.h>
21 #include <arpa/inet.h>
22 #include <ifaddrs.h>
23 #include <linux/if.h>
24 #include <string.h>
25 #include <sys/ioctl.h>
26 #include <sys/socket.h>
27 #include <sys/types.h>
28
29 #include "recovery_ui/device.h"
30 #include "recovery_ui/ethernet_device.h"
31 #include "recovery_ui/ethernet_ui.h"
32
33 const std::string EthernetDevice::interface = "eth0";
34
EthernetDevice(EthernetRecoveryUI * ui)35 EthernetDevice::EthernetDevice(EthernetRecoveryUI* ui)
36 : Device(ui), ctl_sock_(socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0)) {
37 if (ctl_sock_ < 0) {
38 PLOG(ERROR) << "Failed to open socket";
39 }
40 }
41
PreRecovery()42 void EthernetDevice::PreRecovery() {
43 SetInterfaceFlags(0, IFF_UP);
44 SetTitleIPv6LinkLocalAddress(false);
45 }
46
PreFastboot()47 void EthernetDevice::PreFastboot() {
48 android::base::SetProperty("fastbootd.protocol", "tcp");
49
50 if (SetInterfaceFlags(IFF_UP, 0) < 0) {
51 LOG(ERROR) << "Failed to bring up interface";
52 return;
53 }
54
55 SetTitleIPv6LinkLocalAddress(true);
56 }
57
SetInterfaceFlags(const unsigned set,const unsigned clr)58 int EthernetDevice::SetInterfaceFlags(const unsigned set, const unsigned clr) {
59 struct ifreq ifr;
60
61 if (ctl_sock_ < 0) {
62 return -1;
63 }
64
65 memset(&ifr, 0, sizeof(struct ifreq));
66 strncpy(ifr.ifr_name, interface.c_str(), IFNAMSIZ);
67 ifr.ifr_name[IFNAMSIZ - 1] = 0;
68
69 if (ioctl(ctl_sock_, SIOCGIFFLAGS, &ifr) < 0) {
70 PLOG(ERROR) << "Failed to get interface active flags";
71 return -1;
72 }
73 ifr.ifr_flags = (ifr.ifr_flags & (~clr)) | set;
74
75 if (ioctl(ctl_sock_, SIOCSIFFLAGS, &ifr) < 0) {
76 PLOG(ERROR) << "Failed to set interface active flags";
77 return -1;
78 }
79
80 return 0;
81 }
82
SetTitleIPv6LinkLocalAddress(const bool interface_up)83 void EthernetDevice::SetTitleIPv6LinkLocalAddress(const bool interface_up) {
84 auto recovery_ui = reinterpret_cast<EthernetRecoveryUI*>(GetUI());
85 if (!interface_up) {
86 recovery_ui->SetIPv6LinkLocalAddress();
87 return;
88 }
89
90 struct ifaddrs* ifaddr;
91 if (getifaddrs(&ifaddr) == -1) {
92 PLOG(ERROR) << "Failed to get interface addresses";
93 recovery_ui->SetIPv6LinkLocalAddress();
94 return;
95 }
96
97 std::unique_ptr<struct ifaddrs, decltype(&freeifaddrs)> guard{ ifaddr, freeifaddrs };
98 for (struct ifaddrs* ifa = ifaddr; ifa != nullptr; ifa = ifa->ifa_next) {
99 if (ifa->ifa_addr->sa_family != AF_INET6 || interface != ifa->ifa_name) {
100 continue;
101 }
102
103 auto current_addr = reinterpret_cast<struct sockaddr_in6*>(ifa->ifa_addr);
104 if (!IN6_IS_ADDR_LINKLOCAL(&(current_addr->sin6_addr))) {
105 continue;
106 }
107
108 char addrstr[INET6_ADDRSTRLEN];
109 inet_ntop(AF_INET6, reinterpret_cast<const void*>(¤t_addr->sin6_addr), addrstr,
110 INET6_ADDRSTRLEN);
111 LOG(INFO) << "Our IPv6 link-local address is " << addrstr;
112 recovery_ui->SetIPv6LinkLocalAddress(addrstr);
113 return;
114 }
115
116 recovery_ui->SetIPv6LinkLocalAddress();
117 }
118