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根据文档，更改配置文件，和给需要的so以及apk提交系统签名，必须要系统权限
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修改FW层架增加增加路由表
/*
* Copyright (C) 2008 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 <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#define LOG_TAG "Netd"
#include <cutils/log.h>
#include <netutils/ifc.h>
#include <sysutils/NetlinkEvent.h>
#include "NetlinkHandler.h"
#include "NetlinkManager.h"
#include "ResponseCode.h"
#include "SockDiag.h"
#include "Controllers.h"
#include "RouteController.h"
static const char *kUpdated = "updated";
static const char *kRemoved = "removed";
namespace android {
namespace net {
NetlinkHandler::NetlinkHandler(NetlinkManager *nm, int listenerSocket,
int format) :
NetlinkListener(listenerSocket, format) {
mNm = nm;
}
NetlinkHandler::~NetlinkHandler() {
}
int NetlinkHandler::start() {
return this->startListener();
}
int NetlinkHandler::stop() {
return this->stopListener();
}
static long parseIfIndex(const char* ifIndex) {
if (ifIndex == nullptr) {
return 0;
}
long ifaceIndex = strtol(ifIndex, NULL, 10);
// strtol returns 0 on error, which is fine because 0 is not a valid ifindex.
if (errno == ERANGE && (ifaceIndex == LONG_MAX || ifaceIndex == LONG_MIN)) {
return 0;
}
return ifaceIndex;
}
void NetlinkHandler::onEvent(NetlinkEvent *evt) {
const char *subsys = evt->getSubsystem();
if (!subsys) {
ALOGW("No subsystem found in netlink event");
return;
}
if (!strcmp(subsys, "net")) {
NetlinkEvent::Action action = evt->getAction();
const char *iface = evt->findParam("INTERFACE");
if ((action == NetlinkEvent::Action::kAdd) ||
(action == NetlinkEvent::Action::kLinkUp) ||
(action == NetlinkEvent::Action::kLinkDown)) {
const char *ifIndex = evt->findParam("IFINDEX");
long ifaceIndex = parseIfIndex(ifIndex);
if (ifaceIndex) {
gCtls->trafficCtrl.addInterface(iface, ifaceIndex);
} else {
ALOGE("invalid interface index: %s(%s)", iface, ifIndex);
}
}
if (action == NetlinkEvent::Action::kAdd) {
notifyInterfaceAdded(iface);
} else if (action == NetlinkEvent::Action::kRemove) {
notifyInterfaceRemoved(iface);
} else if (action == NetlinkEvent::Action::kChange) {
evt->dump();
notifyInterfaceChanged("nana", true);
} else if (action == NetlinkEvent::Action::kLinkUp) {
const char *iface = evt->findParam("INTERFACE");
if (!strncmp(iface, "wwan0", 5))
{
int ret =RouteController::addRoute(iface, "192.168.66.0/24", NULL, RouteController::LEGACY_SYSTEM);
ALOGE("Error destroying sockets: %s", strerror(-ret));
}
notifyInterfaceLinkChanged(iface, true);
} else if (action == NetlinkEvent::Action::kLinkDown) {
notifyInterfaceLinkChanged(iface, false);
} else if (action == NetlinkEvent::Action::kAddressUpdated ||
action == NetlinkEvent::Action::kAddressRemoved) {
const char *address = evt->findParam("ADDRESS");
const char *flags = evt->findParam("FLAGS");
const char *scope = evt->findParam("SCOPE");
const char *ifIndex = evt->findParam("IFINDEX");
char addrstr[INET6_ADDRSTRLEN + strlen("/128")];
strlcpy(addrstr, address, sizeof(addrstr));
char *slash = strchr(addrstr, '/');
if (slash) {
*slash = '\0';
}
long ifaceIndex = parseIfIndex(ifIndex);
if (!ifaceIndex) {
ALOGE("invalid interface index: %s(%s)", iface, ifIndex);
}
if (action == NetlinkEvent::Action::kAddressUpdated) {
gCtls->netCtrl.addInterfaceAddress(ifaceIndex, address);
} else { // action == NetlinkEvent::Action::kAddressRemoved
bool shouldDestroy = gCtls->netCtrl.removeInterfaceAddress(ifaceIndex, address);
if (shouldDestroy) {
SockDiag sd;
if (sd.open()) {
int ret = sd.destroySockets(addrstr);
if (ret < 0) {
ALOGE("Error destroying sockets: %s", strerror(-ret));
}
} else {
ALOGE("Error opening NETLINK_SOCK_DIAG socket: %s", strerror(errno));
}
}
}
// Note: if this interface was deleted, iface is "" and we don't notify.
if (iface && iface[0] && address && flags && scope) {
notifyAddressChanged(action, address, iface, flags, scope);
}
} else if (action == NetlinkEvent::Action::kRdnss) {
const char *lifetime = evt->findParam("LIFETIME");
const char *servers = evt->findParam("SERVERS");
if (lifetime && servers) {
notifyInterfaceDnsServers(iface, lifetime, servers);
}
} else if (action == NetlinkEvent::Action::kRouteUpdated ||
action == NetlinkEvent::Action::kRouteRemoved) {
const char *route = evt->findParam("ROUTE");
const char *gateway = evt->findParam("GATEWAY");
const char *iface = evt->findParam("INTERFACE");
if (route && (gateway || iface)) {
notifyRouteChange(action, route, gateway, iface);
}
}
} else if (!strcmp(subsys, "qlog") || !strcmp(subsys, "xt_quota2")) {
const char *alertName = evt->findParam("ALERT_NAME");
const char *iface = evt->findParam("INTERFACE");
notifyQuotaLimitReached(alertName, iface);
} else if (!strcmp(subsys, "strict")) {
const char *uid = evt->findParam("UID");
const char *hex = evt->findParam("HEX");
notifyStrictCleartext(uid, hex);
} else if (!strcmp(subsys, "xt_idletimer")) {
const char *label = evt->findParam("INTERFACE");
const char *state = evt->findParam("STATE");
const char *timestamp = evt->findParam("TIME_NS");
const char *uid = evt->findParam("UID");
if (state)
notifyInterfaceClassActivity(label, !strcmp("active", state),
timestamp, uid);
#if !LOG_NDEBUG
} else if (strcmp(subsys, "platform") && strcmp(subsys, "backlight")) {
/* It is not a VSYNC or a backlight event */
ALOGV("unexpected event from subsystem %s", subsys);
#endif
}
}
void NetlinkHandler::notify(int code, const char *format, ...) {
char *msg;
va_list args;
va_start(args, format);
if (vasprintf(&msg, format, args) >= 0) {
mNm->getBroadcaster()->sendBroadcast(code, msg, false);
free(msg);
} else {
SLOGE("Failed to send notification: vasprintf: %s", strerror(errno));
}
va_end(args);
}
void NetlinkHandler::notifyInterfaceAdded(const char *name) {
notify(ResponseCode::InterfaceChange, "Iface added %s", name);
}
void NetlinkHandler::notifyInterfaceRemoved(const char *name) {
notify(ResponseCode::InterfaceChange, "Iface removed %s", name);
}
void NetlinkHandler::notifyInterfaceChanged(const char *name, bool isUp) {
notify(ResponseCode::InterfaceChange,
"Iface changed %s %s", name, (isUp ? "up" : "down"));
}
void NetlinkHandler::notifyInterfaceLinkChanged(const char *name, bool isUp) {
notify(ResponseCode::InterfaceChange,
"Iface linkstate %s %s", name, (isUp ? "up" : "down"));
}
void NetlinkHandler::notifyQuotaLimitReached(const char *name, const char *iface) {
notify(ResponseCode::BandwidthControl, "limit alert %s %s", name, iface);
}
void NetlinkHandler::notifyInterfaceClassActivity(const char *name,
bool isActive,
const char *timestamp,
const char *uid) {
if (timestamp == NULL)
notify(ResponseCode::InterfaceClassActivity,
"IfaceClass %s %s", isActive ? "active" : "idle", name);
else if (uid != NULL && isActive)
notify(ResponseCode::InterfaceClassActivity,
"IfaceClass active %s %s %s", name, timestamp, uid);
else
notify(ResponseCode::InterfaceClassActivity,
"IfaceClass %s %s %s", isActive ? "active" : "idle", name, timestamp);
}
void NetlinkHandler::notifyAddressChanged(NetlinkEvent::Action action, const char *addr,
const char *iface, const char *flags,
const char *scope) {
notify(ResponseCode::InterfaceAddressChange,
"Address %s %s %s %s %s",
(action == NetlinkEvent::Action::kAddressUpdated) ? kUpdated : kRemoved,
addr, iface, flags, scope);
}
void NetlinkHandler::notifyInterfaceDnsServers(const char *iface,
const char *lifetime,
const char *servers) {
notify(ResponseCode::InterfaceDnsInfo, "DnsInfo servers %s %s %s",
iface, lifetime, servers);
}
void NetlinkHandler::notifyRouteChange(NetlinkEvent::Action action, const char *route,
const char *gateway, const char *iface) {
notify(ResponseCode::RouteChange,
"Route %s %s%s%s%s%s",
(action == NetlinkEvent::Action::kRouteUpdated) ? kUpdated : kRemoved,
route,
(gateway && *gateway) ? " via " : "",
gateway,
(iface && *iface) ? " dev " : "",
iface);
}
void NetlinkHandler::notifyStrictCleartext(const char* uid, const char* hex) {
notify(ResponseCode::StrictCleartext, "%s %s", uid, hex);
}
} // namespace net
} // namespace android
- 以上代码修改 system/netd/server 下的 NetlinkHandler.cpp 文件直接替换即可
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