URL https://opencores.org/ocsvn/openrisc/openrisc/trunk
Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [doc/] [html/] [ref/] [tcpip-openbsd-tcpip-apis.html] - Rev 593

Go to most recent revision | Compare with Previous | Blame | View Log
<!-- Copyright (C) 2003 Red Hat, Inc.                                -->
<!-- This material may be distributed only subject to the terms      -->
<!-- and conditions set forth in the Open Publication License, v1.0  -->
<!-- or later (the latest version is presently available at          -->
<!-- http://www.opencontent.org/openpub/).                           -->
<!-- Distribution of the work or derivative of the work in any       -->
<!-- standard (paper) book form is prohibited unless prior           -->
<!-- permission is obtained from the copyright holder.               -->
<HTML
><HEAD
><TITLE
>APIs</TITLE
><meta name="MSSmartTagsPreventParsing" content="TRUE">
<META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
"><LINK
REL="HOME"
TITLE="eCos Reference Manual"
HREF="ecos-ref.html"><LINK
REL="UP"
TITLE="OpenBSD TCP/IP Stack port for eCos"
HREF="tcpip-openbsd.html"><LINK
REL="PREVIOUS"
TITLE="Building the Network Stack"
HREF="tcpip-openbsd-building-the-network-stack.html"><LINK
REL="NEXT"
TITLE="Enhanced Select()"
HREF="tcpip-openbsd-enhanced-select.html"></HEAD
><BODY
CLASS="CHAPTER"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>eCos Reference Manual</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="tcpip-openbsd-building-the-network-stack.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
></TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="tcpip-openbsd-enhanced-select.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="CHAPTER"
><H1
><A
NAME="TCPIP-OPENBSD-TCPIP-APIS">Chapter 44. APIs</H1
><DIV
CLASS="TOC"
><DL
><DT
><B
>Table of Contents</B
></DT
><DT
><A
HREF="tcpip-openbsd-tcpip-apis.html#TCPIP-OPENBSD-STANDARD-NETWORKING-API"
>Standard networking</A
></DT
><DT
><A
HREF="tcpip-openbsd-enhanced-select.html"
>Enhanced Select()</A
></DT
></DL
></DIV
><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="TCPIP-OPENBSD-STANDARD-NETWORKING-API">Standard networking</H1
><P
>The APIs for the standard networking calls such as
<TT
CLASS="FUNCTION"
>socket()</TT
>, <TT
CLASS="FUNCTION"
>recv()</TT
> and so on, are
in header files relative to the top-level
include directory, within the standard subdirectories as conventionally
found in <TT
CLASS="FILENAME"
>/usr/include</TT
>.  For example:
<TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
> install/include/arpa/tftp.h
 install/include/netinet/tcpip.h
 install/include/sys/socket.h
 install/include/sys/socketvar.h
 install/include/sys/sockio.h</PRE
></TD
></TR
></TABLE
></P
><P
><TT
CLASS="FILENAME"
>network.h</TT
> at the top level
defines various extensions, for example the API
<TT
CLASS="FUNCTION"
>init_all_network_interfaces(void)</TT
>
described
above.  We advise including <TT
CLASS="FILENAME"
>network.h</TT
> whether
you use these features or not.</P
><P
>In general, using the networking code may require definition
of two symbols: _KERNEL and __ECOS.  _KERNEL
is not normally required; __ECOS is normally required.
So add this to your compile lines for files which use the network
stack:</P
><TABLE
BORDER="5"
BGCOLOR="#E0E0F0"
WIDTH="70%"
><TR
><TD
><PRE
CLASS="PROGRAMLISTING"
>	-D__ECOS</PRE
></TD
></TR
></TABLE
><P
>To expand a little, it&#8217;s like this because this is
a port of a standard distribution external to Red Hat.  One goal
is to perturb the sources as little as possible, so that upgrading
and maintenance from the external distribution is simplified.  The __ECOS
symbol marks out Red Hat&#8217;s additions in making the port.
The _KERNEL symbol is traditional UNIX practice: it distinguishes
a compilation which is to be linked into the kernel from one which
is part of an application.  eCos applications are fully linked,
so this distinction does not apply.  _KERNEL can however
be used to control the visibility of the internals of the stack,
so depending on what features your application uses, it may or may
not be necessary.</P
><P
>The include file <TT
CLASS="FILENAME"
>network.h</TT
> undefines _KERNEL
unconditionally, to provide an application-like compilation environment.
If you were writing code which, for example,
enumerates the stack&#8217;s internal
structures, that is a kernel-like compilation environment, so you
would need to define _KERNEL (in addition to __ECOS)
and avoid including <TT
CLASS="FILENAME"
>network.h</TT
>.</P
></DIV
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="tcpip-openbsd-building-the-network-stack.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="ecos-ref.html"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="tcpip-openbsd-enhanced-select.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>Building the Network Stack</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="tcpip-openbsd.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>Enhanced Select()</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>
Go to most recent revision | Compare with Previous | Blame | View Log
Browse

Tools

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [doc/] [html/] [ref/] [tcpip-openbsd-tcpip-apis.html] - Rev 593
