#QT GET MAC ADDRESS FROM IP WINDOWS#

This error is returned on Windows Server 2003 and earlier when an ARP reply to the SendARP request was not received. This error is returned on Windows Vista if the ULONG value pointed to by the PhyAddrLen parameter is less than 6, the size required to store a complete physical address.Ī device attached to the system is not functioning. This error occurs if the destination IPv4 address could not be reached because it is not on the same subnet or the destination computer is not operating. This error is returned on Windows Vista and later when an ARP reply to the SendARP request was not received. If the function fails, the return value is one of the following error codes. If the function succeeds, the return value is NO_ERROR. On successful output, this parameter points to a value that specifies the number of bytes written to the buffer pointed to by the pMacAddr. The buffer to receive the physical address is pointed to by the pMacAddr parameter. The buffer size should be at least 6 bytes for an Ethernet or token ring physical address On input, a pointer to a ULONG value that specifies the maximum buffer size, in bytes, the application has set aside to receive the physical address or MAC address. The first six bytes of this array receive the physical address that corresponds to the IPv4 address specified by the DestIP parameter. This array must have at least two ULONG elements to hold an Ethernet or token ring physical address. The caller may specify zero corresponding to the INADDR_ANY IPv4 address for this parameter.Ī pointer to an array of ULONG variables. This parameter is optional and is used to select the interface to send the request on for the ARP entry. The source IPv4 address of the sender, in the form of an IPAddr structure. The ARP request attempts to obtain the physical address that corresponds to this IPv4 address. The destination IPv4 address, in the form of an IPAddr structure. Syntax IPHLPAPI_DLL_LINKAGE DWORD SendARP( SendARP function sends an Address Resolution Protocol (ARP) request to obtain the physical address that corresponds to the specified destination IPv4 address.

Qt get mac address from ip