我有XgTunWrap.encapsulation()
UInt16 encapsulation(out IntPtr pkt, UInt32 src_ip, UInt32 dst_ip, UInt16 sport, UInt16 dport, UInt16 pktLen);
函数(C#中的C ++ dll),它接受字节数组指针并封装该字节数组并返回字节数组的长度。我正在尝试使用编组来获取封装的字节数组,但是会出现内存访问冲突错误。
在我的源代码下面给出了错误。有没有办法获得封装的字节数组?
int lenghtAr = Marshal.SizeOf(msg[0]) * msg.Length;
IntPtr unmPont = Marshal.AllocHGlobal(lenghtAr);
try
{
Marshal.Copy(msg, 0, unmPont, msg.Length);
len = XgTunWrap.encapsulation(out unmPont, m_pList.m_DeviceHoA.IpAddress, item.m_VptAliasHoA.IpAddress, (ushort)taPort, (ushort)taPort, (short)msg.Length);
res = new byte[len];
Marshal.Copy(unmPont, res, 0, (int)len);
}
catch (Exception ex)
{throw; }
finally
{
Marshal.FreeHGlobal(unmPont);
}
答案 0 :(得分:0)
谢谢@Jeroen!我按照你的评论做了。我在out
前删除了IntPtr
。这是我的工作代码:
UInt16 encapsulation(IntPtr pkt,
UInt32 src_ip,
UInt32 dst_ip,
UInt16 sport,
UInt16 dport,
UInt16 pktLen);
和工作机构:
int lengthAr = Marshal.SizeOf(msg[0]) * msg.Length;
IntPtr unmPont = Marshal.AllocHGlobal(lengthAr);
try
{
Marshal.Copy(msg, 0, unmPont, lengthAr);
len = XgTunWrap.encapsulation(unmPont,
m_pList.m_DeviceHoA.IpAddress,
item.m_VptAliasHoA.IpAddress,
(ushort)taPort,
(ushort)taPort,
(ushort)msg.Length);
res = new byte[len];
Marshal.Copy(unmPont, res, 0, (int)len);
}
finally
{
Marshal.FreeHGlobal(unmPont);
}