Lianja

Send a 16-bit Integer over a Socket

Demonstrates Socket.SendInt16, which sends the low 16 bits of a value as a two-byte integer in the selected byte order.

Background. Fixed-size integers and length prefixes are common building blocks for application-defined binary protocols. Byte order is selectable, with big-endian being network byte order.

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llSuccess = .F.

loSocket = createobject("CkSocket")

//  Connect to the server using TLS.
llBTls = .T.
lnMaxWaitMs = 5000
llSuccess = loSocket.Connect("example.com",5000,llBTls,lnMaxWaitMs)
if (llSuccess = .F.) then
    ? loSocket.LastErrorText
    release loSocket
    return
endif

//  Send the low 16 bits of the value as a two-byte integer.  Use .T. for network byte order
//  (big-endian) or .F. for little-endian.
llBBigEndian = .T.
llSuccess = loSocket.SendInt16(1024,llBBigEndian)
if (llSuccess = .F.) then
    ? loSocket.LastErrorText
    release loSocket
    return
endif

? "16-bit integer sent."


release loSocket