/******************************************************************************
* 函数名称：FrameDecapsulation()
* 功能：数据帧解封装
* 参数：无
* 返回值：无
* ***************************************************************************/
public void FrameDecapsulation()
{
try
{
Object data = null;
if (this.Component_reveice_queue.Count > 0)
{
//读取无线模块接收队列数据
data = this.Component_reveice_queue.Dequeue();
switch (data.GetType().Name)
{
case "Frame_802_15_4": //若为802.15.4数据帧
Frame_802_15_4 frame = (Frame_802_15_4)data;
//检查目的地址是否为本模块地址
if (frame.dest_addr != mac_address) //若不是
{
return; //返回，丢弃该数据帧
}
//上层PDU判断方式1：读取第24字节前3bit值，若为011则是6LoWPAN PDU，若为111则为ConnID PDU
//上层PDU判断方式2：若pdu_lowpan_iphc变量不为空,则为6LoWPAN PDU，若pdu_connid不为空，
//则为ConnID PDU
//采用判断方式2
if (frame.pdu_lowpan_iphc != null)
{
//解封装，获取6LoWPAN PDU,并进入无线模块组件发送队列
this.Component_send_queue.Enqueue(frame.pdu_lowpan_iphc);
}
else if (frame.pdu_connid != null)
{
//解封装，获取ConnID PDU,并进入无线模块组件发送队列
this.Component_send_queue.Enqueue(frame.pdu_connid);
}
break;
case "Frame_802_15_1": //若为802.15.1数据帧
Frame_802_15_1 frame802151 = (Frame_802_15_1)data;
//检查接入地址是否一致
if (frame802151.access_addr != access_address) //若不是
{
return; //返回，丢弃该数据帧
}
//解封装，获取ConnID PDU,并进入无线模块组件发送队列
this.Component_send_queue.Enqueue(frame802151.pdu_connid);
break;
}
}
}
catch (Exception e)
{
Console.WriteLine("wireless module2错误情况：" + e.Message + " " + e.StackTrace);
}
}
/******************************************************************************
* 函数名称：FrameEncapsulation()
* 功能：数据帧封装
* 参数：x表示数据帧封装格式
* x="frame802154":封装为802.15.4数据帧；
* x="frame805151":封装为802.15.1数据帧；
* x="frame80211":封装为802.11数据帧
* dest_addr表示目标地址
* 返回值：无
* ***************************************************************************/
public void FrameEncapsulation(string x, UInt64 dest_addr)
{
Byte temp = 0;
try
{
Object data = null;
if (this.Component_reveice_queue.Count > 0)
{
//读取无线模块接收队列数据
data = this.Component_reveice_queue.Dequeue();
if (data.GetType().Name == "PDU_LoWPAN_IPHC") //若为6LoWPAN报文数据
{
//添加802.15.4帧首部
Frame_802_15_4 frame_802_15_4 = new Frame_802_15_4();
frame_802_15_4.frame_control = 0x2033; //帧控制位 0010 0000 0011 0011
if (i < 255)
{
temp = i++;
}
else
{
i = 0;
temp = 0;
}
frame_802_15_4.sequence_number = temp; //序列号
frame_802_15_4.dest_panid = 0x2019; //目标PANID 0010 0000 0001 1001
//frame_802_15_4.dest_addr = 0x10010585FEAB1001;//目标地址
frame_802_15_4.dest_addr = dest_addr; //目标地址
frame_802_15_4.source_panid = 0x2019; //源PANID
//frame_802_15_4.source_addr = 0x10010585FEAB5001;//源地址
frame_802_15_4.source_addr = mac_address; //源地址
//添加6LoWPAN PDU
frame_802_15_4.pdu_lowpan_iphc = new PDU_LoWPAN_IPHC();
frame_802_15_4.pdu_lowpan_iphc = (PDU_LoWPAN_IPHC)data; //6LoWPAN PDU
//802.15.4帧进入组件发送队列
this.Component_send_queue.Enqueue(frame_802_15_4);
}
else if (data.GetType().Name == "PDU_ConnID")
{
switch (x)
{
case "frame802154": //添加802.15.4帧首部
Frame_802_15_4 frame_802_15_4 = new Frame_802_15_4();
frame_802_15_4.frame_control = 0x2033; //帧控制位 0010 0000 0011 0011
if (i < 255)
{
temp = i++;
}
else
{
i = 0;
temp = 0;
}
frame_802_15_4.sequence_number = temp; //序列号
frame_802_15_4.dest_panid = 0x2019; //目标PANID 0010 0000 0001 1001
frame_802_15_4.dest_addr = dest_addr; //目标地址
frame_802_15_4.source_panid = 0x2019; //源PANID
frame_802_15_4.source_addr = mac_address; //源地址
//添加ConnID PDU
frame_802_15_4.pdu_connid = new PDU_ConnID();
frame_802_15_4.pdu_connid = (PDU_ConnID)data; //ConnID PDU
//802.15.4帧进入组件发送队列
this.Component_send_queue.Enqueue(frame_802_15_4);
break;
case "frame802151": //添加802.15.1帧首部
Frame_802_15_1 frame_802_15_1 = new Frame_802_15_1();
//802.15.1广播接入地址0x8E89BED6
//802.15.1数据接入地址0x8569FAC7
frame_802_15_1.access_addr = (UInt32)dest_addr; //接入地址
frame_802_15_1.notice_header = 0xFB; //通告首部
frame_802_15_1.dev_addr = mac_address; //设备地址
//添加ConnID PDU
frame_802_15_1.pdu_connid = new PDU_ConnID();
frame_802_15_1.pdu_connid = (PDU_ConnID)data; //ConnID PDU
int len = 0;
foreach (Byte[] B in frame_802_15_1.pdu_connid.application_data)
{
foreach (Byte b in B)
{
len++;
}
}
frame_802_15_1.payload_length = (Byte)(len + 9); //9：ConnID + message identify
//802.15.1帧进入组件发送队列
this.Component_send_queue.Enqueue(frame_802_15_1);
break;
case "frame80211":
break;
}
}
}
}
catch (Exception e)
{
Console.WriteLine("wireless module错误情况：" + e.Message + " " + e.StackTrace);
}
}
