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Commit a5c83a56 authored by Tomasz Wasilczyk's avatar Tomasz Wasilczyk
Browse files

Implement ethtool get/set value operations 

Bug: 156784343
Test: manual
Change-Id: I33b23bf9c6639cab6006c756d4ddbe561b9441ba
parent a9872735

automotive/can/1.0/default/libnetdevice/Android.bp

+2 −0
Original line number Diff line number Diff line
@@ -35,6 +35,8 @@ cc_library_static { 
        "NetlinkSocket.cpp",

        "can.cpp",

        "common.cpp",

        "ethtool.cpp",

        "ifreqs.cpp",

        "libnetdevice.cpp",

        "printer.cpp",

        "vlan.cpp",

automotive/can/1.0/default/libnetdevice/common.cpp

+2 −0
Original line number Diff line number Diff line
@@ -22,6 +22,8 @@ 


namespace android::netdevice {



socketparams::Params socketparams::current = general;



unsigned int nametoindex(const std::string& ifname) {

    const auto ifidx = if_nametoindex(ifname.c_str());

    if (ifidx != 0) return ifidx;

automotive/can/1.0/default/libnetdevice/common.h

+18 −0
Original line number Diff line number Diff line
@@ -18,10 +18,28 @@ 


#include "nlbuf.h"



#include <linux/can.h>

#include <net/if.h>



#include <string>



namespace android::netdevice {



namespace socketparams {



struct Params {

    int domain;

    int type;

    int protocol;

};



constexpr Params general = {AF_INET, SOCK_DGRAM, 0};

constexpr Params can = {PF_CAN, SOCK_RAW, CAN_RAW};



extern Params current;



}  // namespace socketparams



/**

 * Returns the index of a given network interface.

 *

automotive/can/1.0/default/libnetdevice/ethtool.cpp

0 → 100644
+47 −0
Original line number Diff line number Diff line 
/*

 * 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 <libnetdevice/ethtool.h>



#include "ifreqs.h"



#include <linux/ethtool.h>



namespace android::netdevice::ethtool {



std::optional<uint32_t> getValue(const std::string& ifname, uint32_t command) {

    struct ethtool_value valueop = {};

    valueop.cmd = command;



    auto ifr = ifreqs::fromName(ifname);

    ifr.ifr_data = &valueop;



    if (!ifreqs::send(SIOCETHTOOL, ifr)) return std::nullopt;

    return valueop.data;

}



bool setValue(const std::string& ifname, uint32_t command, uint32_t value) {

    struct ethtool_value valueop = {};

    valueop.cmd = command;

    valueop.data = value;



    auto ifr = ifreqs::fromName(ifname);

    ifr.ifr_data = &valueop;



    return ifreqs::send(SIOCETHTOOL, ifr);

}



}  // namespace android::netdevice::ethtool

automotive/can/1.0/default/libnetdevice/ifreqs.cpp

0 → 100644
+48 −0
Original line number Diff line number Diff line 
/*

 * 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 "ifreqs.h"



#include "common.h"



#include <android-base/logging.h>

#include <android-base/unique_fd.h>



namespace android::netdevice::ifreqs {



bool send(unsigned long request, struct ifreq& ifr) {

    base::unique_fd sock(socket(socketparams::current.domain, socketparams::current.type,

                                socketparams::current.protocol));

    if (!sock.ok()) {

        LOG(ERROR) << "Can't create socket";

        return false;

    }



    if (ioctl(sock.get(), request, &ifr) < 0) {

        PLOG(ERROR) << "ioctl(" << std::hex << request << std::dec << ") failed";

        return false;

    }



    return true;

}



struct ifreq fromName(const std::string& ifname) {

    struct ifreq ifr = {};

    strlcpy(ifr.ifr_name, ifname.c_str(), IF_NAMESIZE);

    return ifr;

}



}  // namespace android::netdevice::ifreqs