TDI_QUERY_INFORMATION allows getting both IP address and port. Refer the structures below in the DDK docs or MSDN.
typedef struct _TA_ADDRESS {
USHORT AddressLength;
USHORT AddressType;
UCHAR Address[1];
} TA_ADDRESS, *PTA_ADDRESS;
typedef struct _TA_ADDRESS_IP {
LONG TAAddressCount;
struct _AddrIp {
USHORT AddressLength;
USHORT AddressType;
TDI_ADDRESS_IP Address[1];
} Address [1];
} TA_IP_ADDRESS, *PTA_IP_ADDRESS;
typedef struct _TDI_ADDRESS_IP {
USHORT sin_port;
ULONG in_addr;
UCHAR sin_zero[8];
} TDI_ADDRESS_IP, *PTDI_ADDRESS_IP;