Re: Suggestions for custom application-layer protocol?

From: David Schwartz (davids_at_webmaster.com)
Date: 05/26/05

  • Next message: Grant Edwards: "Re: Suggestions for custom application-layer protocol?" 
    Date: Thu, 26 May 2005 11:13:38 -0700

    "Walter Roberson" <roberson@ibd.nrc-cnrc.gc.ca> wrote in message
    news:d753g2$lim$1@canopus.cc.umanitoba.ca...

    > You still need to "mess about" if your data might not fit in a single
    > packet.

        And even if it does.

    > Recall that when you read() from a socket you are not certain
    > to get all of the data unless the data length is no greater than
    > your system's atomicity limits [PIPE_BUF]. The POSIX minimum
    > value for PIPE_BUF is 512 -- so in the general case a write() of
    > more than 512 bytes may require multiple read() statements.

        These atomicity limits don't apply to TCP connections, which have their
    own segmentation rules.

        DS

  • Next message: Grant Edwards: "Re: Suggestions for custom application-layer protocol?"