/*
* Copyright (C) 2017 The Android Open Source Project
*
* Portions copyright (C) 2017 Broadcom Limited
*
* 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 <stdint.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/family.h>
#include <netlink/genl/ctrl.h>
#include <linux/rtnetlink.h>
#include <netpacket/packet.h>
#include <linux/filter.h>
#include <linux/errqueue.h>
#include <linux/pkt_sched.h>
#include <netlink/object-api.h>
#include <netlink/netlink.h>
#include <netlink/socket.h>
#include <netlink-private/object-api.h>
#include <netlink-private/types.h>
#include "nl80211_copy.h"
#include "sync.h"
#define LOG_TAG "WifiHAL"
#include <log/log.h>
#include "wifi_hal.h"
#include "common.h"
#include "cpp_bindings.h"
typedef enum {
WIFI_OFFLOAD_START_MKEEP_ALIVE = ANDROID_NL80211_SUBCMD_WIFI_OFFLOAD_RANGE_START,
WIFI_OFFLOAD_STOP_MKEEP_ALIVE,
} WIFI_OFFLOAD_SUB_COMMAND;
typedef enum {
MKEEP_ALIVE_ATTRIBUTE_ID,
MKEEP_ALIVE_ATTRIBUTE_IP_PKT,
MKEEP_ALIVE_ATTRIBUTE_IP_PKT_LEN,
MKEEP_ALIVE_ATTRIBUTE_SRC_MAC_ADDR,
MKEEP_ALIVE_ATTRIBUTE_DST_MAC_ADDR,
MKEEP_ALIVE_ATTRIBUTE_PERIOD_MSEC
} WIFI_MKEEP_ALIVE_ATTRIBUTE;
typedef enum {
START_MKEEP_ALIVE,
STOP_MKEEP_ALIVE,
} GetCmdType;
///////////////////////////////////////////////////////////////////////////////
class MKeepAliveCommand : public WifiCommand
{
u8 mIndex;
u8 *mIpPkt;
u16 mIpPktLen;
u8 *mSrcMacAddr;
u8 *mDstMacAddr;
u32 mPeriodMsec;
GetCmdType mType;
public:
// constructor for start sending
MKeepAliveCommand(wifi_interface_handle iface, u8 index, u8 *ip_packet, u16 ip_packet_len,
u8 *src_mac_addr, u8 *dst_mac_addr, u32 period_msec, GetCmdType cmdType)
: WifiCommand("MKeepAliveCommand", iface, 0), mIndex(index), mIpPkt(ip_packet),
mIpPktLen(ip_packet_len), mSrcMacAddr(src_mac_addr), mDstMacAddr(dst_mac_addr),
mPeriodMsec(period_msec), mType(cmdType)
{ }
// constructor for stop sending
MKeepAliveCommand(wifi_interface_handle iface, u8 index, GetCmdType cmdType)
: WifiCommand("MKeepAliveCommand", iface, 0), mIndex(index), mType(cmdType)
{ }
int createRequest(WifiRequest &request) {
int result;
switch (mType) {
case START_MKEEP_ALIVE:
{
result = request.create(GOOGLE_OUI, WIFI_OFFLOAD_START_MKEEP_ALIVE);
if (result != WIFI_SUCCESS) {
ALOGE("Failed to create start keep alive request; result = %d", result);
return result;
}
nlattr *data = request.attr_start(NL80211_ATTR_VENDOR_DATA);
result = request.put_u8(MKEEP_ALIVE_ATTRIBUTE_ID, mIndex);
if (result < 0) {
ALOGE("Failed to put id request; result = %d", result);
return result;
}
result = request.put_u16(MKEEP_ALIVE_ATTRIBUTE_IP_PKT_LEN, mIpPktLen);
if (result < 0) {
ALOGE("Failed to put ip pkt len request; result = %d", result);
return result;
}
result = request.put(MKEEP_ALIVE_ATTRIBUTE_IP_PKT, (u8*)mIpPkt, mIpPktLen);
if (result < 0) {
ALOGE("Failed to put ip pkt request; result = %d", result);
return result;
}
result = request.put_addr(MKEEP_ALIVE_ATTRIBUTE_SRC_MAC_ADDR, mSrcMacAddr);
if (result < 0) {
ALOGE("Failed to put src mac address request; result = %d", result);
return result;
}
result = request.put_addr(MKEEP_ALIVE_ATTRIBUTE_DST_MAC_ADDR, mDstMacAddr);
if (result < 0) {
ALOGE("Failed to put dst mac address request; result = %d", result);
return result;
}
result = request.put_u32(MKEEP_ALIVE_ATTRIBUTE_PERIOD_MSEC, mPeriodMsec);
if (result < 0) {
ALOGE("Failed to put period request; result = %d", result);
return result;
}
request.attr_end(data);
break;
}
case STOP_MKEEP_ALIVE:
{
result = request.create(GOOGLE_OUI, WIFI_OFFLOAD_STOP_MKEEP_ALIVE);
if (result != WIFI_SUCCESS) {
ALOGE("Failed to create stop keep alive request; result = %d", result);
return result;
}
nlattr *data = request.attr_start(NL80211_ATTR_VENDOR_DATA);
result = request.put_u8(MKEEP_ALIVE_ATTRIBUTE_ID, mIndex);
if (result < 0) {
ALOGE("Failed to put id request; result = %d", result);
return result;
}
request.attr_end(data);
break;
}
default:
ALOGE("Unknown wifi keep alive command");
result = WIFI_ERROR_UNKNOWN;
}
return result;
}
int start() {
ALOGD("Start mkeep_alive command");
WifiRequest request(familyId(), ifaceId());
int result = createRequest(request);
if (result != WIFI_SUCCESS) {
ALOGE("Failed to create keep alive request; result = %d", result);
return result;
}
result = requestResponse(request);
if (result != WIFI_SUCCESS) {
ALOGE("Failed to register keep alive response; result = %d", result);
}
return result;
}
virtual int handleResponse(WifiEvent& reply) {
ALOGD("In MKeepAliveCommand::handleResponse");
if (reply.get_cmd() != NL80211_CMD_VENDOR) {
ALOGD("Ignoring reply with cmd = %d", reply.get_cmd());
return NL_SKIP;
}
switch (mType) {
case START_MKEEP_ALIVE:
case STOP_MKEEP_ALIVE:
break;
default:
ALOGW("Unknown mkeep_alive command");
}
return NL_OK;
}
virtual int handleEvent(WifiEvent& event) {
/* NO events! */
return NL_SKIP;
}
};
/* API to send specified mkeep_alive packet periodically. */
wifi_error wifi_start_sending_offloaded_packet(wifi_request_id index, wifi_interface_handle iface,
u8 *ip_packet, u16 ip_packet_len, u8 *src_mac_addr, u8 *dst_mac_addr, u32 period_msec)
{
if ((index > 0 && index <= N_AVAIL_ID) && (ip_packet != NULL) && (src_mac_addr != NULL)
&& (dst_mac_addr != NULL) && (period_msec > 0)
&& (ip_packet_len <= MKEEP_ALIVE_IP_PKT_MAX)) {
MKeepAliveCommand *cmd = new MKeepAliveCommand(iface, index, ip_packet, ip_packet_len,
src_mac_addr, dst_mac_addr, period_msec, START_MKEEP_ALIVE);
NULL_CHECK_RETURN(cmd, "memory allocation failure", WIFI_ERROR_OUT_OF_MEMORY);
wifi_error result = (wifi_error)cmd->start();
cmd->releaseRef();
return result;
} else {
ALOGE("Invalid mkeep_alive parameters");
return WIFI_ERROR_INVALID_ARGS;
}
}
/* API to stop sending mkeep_alive packet. */
wifi_error wifi_stop_sending_offloaded_packet(wifi_request_id index, wifi_interface_handle iface)
{
if (index > 0 && index <= N_AVAIL_ID) {
MKeepAliveCommand *cmd = new MKeepAliveCommand(iface, index, STOP_MKEEP_ALIVE);
NULL_CHECK_RETURN(cmd, "memory allocation failure", WIFI_ERROR_OUT_OF_MEMORY);
wifi_error result = (wifi_error)cmd->start();
cmd->releaseRef();
return result;
} else {
ALOGE("Invalid mkeep_alive parameters");
return WIFI_ERROR_INVALID_ARGS;
}
}