socket=Sconnect(addr,port[,timeout_10ths]) 

Sclose(socket)

Srecv (socket, no_bytes [,timeout_10ths[ ,&pData_buf]]);

socket=Slisten(port)

socket=Saccept(lsock,[timeout_10ths,&pAddr,&pPort])

Ssend (socket, data, no_bytes, [, data1[,data2...]])

flag=Scheck(socket,rd_wr_err)

hostname=Shostname()

socket=SopenDGRAM(port)

SsendDGRAM(sock,addr,port,data,no_bytes,[data1[,data2...])

SrecvDGRAM (socket, no_bytes, pAddr, pPort ,timeout_10ths ,&pData_buf)

Strace(on_off)