RTEMS 4.5.0 On-Line Library

RTEMS Network Supplement

3.4: Application Programming Interface

The RTEMS network package provides almost a complete set of BSD network services. The network functions work like their BSD counterparts with the following exceptions:

• A given socket can be read or written by only one task at a time.
• The select function only works for file descriptors associated with sockets.
• You must call openlog before calling any of the syslog functions.
• Some of the network functions are not thread-safe. For example the following functions return a pointer to a static buffer which remains valid only until the next call:

  gethostbyaddr

  gethostbyname

  inet_ntoa

  (inet_ntop is thread-safe, though).

• The RTEMS network package gathers statistics.
• Addition of a mechanism to "tap onto" an interface and monitor every packet received and transmitted.
• Addition of SO_SNDWAKEUP and SO_RCVWAKEUP socket options.

Some of the new features are discussed in more detail in the following sections.

RTEMS Network Supplement

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