How to validate hostname (may be IP) and port number (CString)

validation mfc port ip hostname
Julian Popov picture Julian Popov · Jun 23, 2009 · Viewed 12.2k times · Source

I have an dialog for HTTP proxy configuration with hostname and port edit boxes.

My question is how can I validate user input for correct hostname and port?

May be I have to use some regular expression for hostname validation or there is some helpful MFC or WinAPI function? What is the maximum correct number for port?

Answer

Shay Erlichmen picture Shay Erlichmen · Jun 23, 2009
  1. Port number is an unsigned short from 1-65535, ports under 1024 are reserved for system services http, ftp, etc.
  2. I don't believe that you can validate host name (or should) especially when you have locallized host names.

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