blob: 04381f2d32e83fd2826521bfca164265251e9761 [file] [log] [blame]
Tomasz Wasilczyk87329672019-07-12 11:43:00 -07001/*
2 * Copyright (C) 2019 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 <libnetdevice/libnetdevice.h>
18
Tomasz Wasilczyk87329672019-07-12 11:43:00 -070019#include "common.h"
Tomasz Wasilczyka5c83a52020-06-16 15:58:19 -070020#include "ifreqs.h"
Tomasz Wasilczyk87329672019-07-12 11:43:00 -070021
22#include <android-base/logging.h>
Tomasz Wasilczyk16954592020-07-28 09:42:55 -070023#include <libnl++/NetlinkRequest.h>
24#include <libnl++/NetlinkSocket.h>
Tomasz Wasilczyk87329672019-07-12 11:43:00 -070025
26#include <linux/can.h>
27#include <net/if.h>
28
Tomasz Wasilczyk55f21932019-12-20 09:20:24 -080029namespace android::netdevice {
Tomasz Wasilczyk87329672019-07-12 11:43:00 -070030
Tomasz Wasilczyk2aa1a122020-07-20 14:03:05 -070031void useSocketDomain(int domain) {
32 ifreqs::socketDomain = domain;
Tomasz Wasilczykad107412020-05-29 16:32:43 -070033}
34
Tomasz Wasilczyk87329672019-07-12 11:43:00 -070035bool exists(std::string ifname) {
36 return nametoindex(ifname) != 0;
37}
38
Tomasz Wasilczyk87329672019-07-12 11:43:00 -070039std::optional<bool> isUp(std::string ifname) {
Tomasz Wasilczyka5c83a52020-06-16 15:58:19 -070040 auto ifr = ifreqs::fromName(ifname);
41 if (!ifreqs::send(SIOCGIFFLAGS, ifr)) return std::nullopt;
Tomasz Wasilczyk87329672019-07-12 11:43:00 -070042 return ifr.ifr_flags & IFF_UP;
43}
44
Tomasz Wasilczykad107412020-05-29 16:32:43 -070045bool existsAndIsUp(const std::string& ifname) {
46 return exists(ifname) && isUp(ifname).value_or(false);
47}
48
Tomasz Wasilczyk87329672019-07-12 11:43:00 -070049bool up(std::string ifname) {
Tomasz Wasilczyka5c83a52020-06-16 15:58:19 -070050 auto ifr = ifreqs::fromName(ifname);
51 if (!ifreqs::send(SIOCGIFFLAGS, ifr)) return false;
Tomasz Wasilczyk87329672019-07-12 11:43:00 -070052 ifr.ifr_flags |= IFF_UP;
Tomasz Wasilczyka5c83a52020-06-16 15:58:19 -070053 return ifreqs::send(SIOCSIFFLAGS, ifr);
Tomasz Wasilczyk87329672019-07-12 11:43:00 -070054}
55
56bool down(std::string ifname) {
Tomasz Wasilczyka5c83a52020-06-16 15:58:19 -070057 auto ifr = ifreqs::fromName(ifname);
58 if (!ifreqs::send(SIOCGIFFLAGS, ifr)) return false;
Tomasz Wasilczyk87329672019-07-12 11:43:00 -070059 ifr.ifr_flags &= ~IFF_UP;
Tomasz Wasilczyka5c83a52020-06-16 15:58:19 -070060 return ifreqs::send(SIOCSIFFLAGS, ifr);
Tomasz Wasilczyk87329672019-07-12 11:43:00 -070061}
62
63bool add(std::string dev, std::string type) {
Tomasz Wasilczyk1d5beb82020-07-29 09:37:44 -070064 nl::NetlinkRequest<struct ifinfomsg> req(RTM_NEWLINK,
65 NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
Tomasz Wasilczyk87329672019-07-12 11:43:00 -070066 req.addattr(IFLA_IFNAME, dev);
67
68 {
69 auto linkinfo = req.nest(IFLA_LINKINFO);
70 req.addattr(IFLA_INFO_KIND, type);
71 }
72
Tomasz Wasilczyk1d5beb82020-07-29 09:37:44 -070073 nl::NetlinkSocket sock(NETLINK_ROUTE);
Tomasz Wasilczyk87329672019-07-12 11:43:00 -070074 return sock.send(req) && sock.receiveAck();
75}
76
77bool del(std::string dev) {
Tomasz Wasilczyk1d5beb82020-07-29 09:37:44 -070078 nl::NetlinkRequest<struct ifinfomsg> req(RTM_DELLINK, NLM_F_REQUEST);
Tomasz Wasilczyk87329672019-07-12 11:43:00 -070079 req.addattr(IFLA_IFNAME, dev);
80
Tomasz Wasilczyk1d5beb82020-07-29 09:37:44 -070081 nl::NetlinkSocket sock(NETLINK_ROUTE);
Tomasz Wasilczyk87329672019-07-12 11:43:00 -070082 return sock.send(req) && sock.receiveAck();
83}
84
Tomasz Wasilczyk91c3a042020-06-24 15:30:10 -070085std::optional<hwaddr_t> getHwAddr(const std::string& ifname) {
86 auto ifr = ifreqs::fromName(ifname);
87 if (!ifreqs::send(SIOCGIFHWADDR, ifr)) return std::nullopt;
88
89 hwaddr_t hwaddr;
90 memcpy(hwaddr.data(), ifr.ifr_hwaddr.sa_data, hwaddr.size());
91 return hwaddr;
92}
93
Tomasz Wasilczykcaeae192020-06-25 13:36:48 -070094bool setHwAddr(const std::string& ifname, hwaddr_t hwaddr) {
95 auto ifr = ifreqs::fromName(ifname);
96
97 // fetch sa_family
98 if (!ifreqs::send(SIOCGIFHWADDR, ifr)) return false;
99
100 memcpy(ifr.ifr_hwaddr.sa_data, hwaddr.data(), hwaddr.size());
101 return ifreqs::send(SIOCSIFHWADDR, ifr);
102}
103
Tomasz Wasilczyk55f21932019-12-20 09:20:24 -0800104} // namespace android::netdevice
Tomasz Wasilczyk91c3a042020-06-24 15:30:10 -0700105
106bool operator==(const android::netdevice::hwaddr_t lhs, const unsigned char rhs[ETH_ALEN]) {
107 static_assert(lhs.size() == ETH_ALEN);
108 return 0 == memcmp(lhs.data(), rhs, lhs.size());
109}