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<html><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><!--Converted with jLaTeX2HTML 2002 (1.62) JA patch-1.4patched version by: Kenshi Muto, Debian Project.LaTeX2HTML 2002 (1.62),original version by: Nikos Drakos, CBLU, University of Leeds* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan* with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --><HTML><HEAD><TITLE>39.4 Network Objects</TITLE><META NAME="description" CONTENT="39.4 Network Objects"><META NAME="keywords" CONTENT="everything"><META NAME="resource-type" CONTENT="document"><META NAME="distribution" CONTENT="global"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"><META NAME="Generator" CONTENT="jLaTeX2HTML v2002 JA patch-1.4"><META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css"><LINK REL="STYLESHEET" HREF="everything.css" tppabs="http://www.isi.edu/nsnam/ns/doc/everything.css"><LINK REL="next" HREF="node551.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node551.html"><LINK REL="previous" HREF="node543.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node543.html"><LINK REL="up" HREF="node540.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node540.html"><LINK REL="next" HREF="node546.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node546.html"></HEAD><BODY ><!--Navigation Panel--><A NAME="tex2html9783" HREF="node546.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node546.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html9777" HREF="node540.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node540.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html9771" HREF="node544.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node544.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html9779" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html"><IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="file:/usr/share/latex2html/icons/contents.png"></A> <A NAME="tex2html9781" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html"><IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="file:/usr/share/latex2html/icons/index.png"></A> <BR><B> Next:</B> <A NAME="tex2html9784" HREF="node546.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node546.html">39.4.1 Pcap/BPF Network Objects</A><B> Up:</B> <A NAME="tex2html9778" HREF="node540.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node540.html">39. Emulation</A><B> Previous:</B> <A NAME="tex2html9772" HREF="node544.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node544.html">39.3.0.0.1 Configuration</A>   <B> <A NAME="tex2html9780" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html9782" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html">Index</A></B> <BR><BR><!--End of Navigation Panel--><H1><A NAME="SECTION09140000000000000000"></A><A NAME="sec:networkobj"></A><BR>39.4 Network Objects</H1><P>Network objects provide access to a live network.There are several forms of network objects, depending on theprotocol layer specified for access to the underlying network,in addition to the facilities provided by the host operating system.Use of some network objects requires special accessprivileges where noted.Generally, network objects provide an entrypoint into the livenetwork at a particular protocol layer (e.g. link, raw IP, UDP, etc)and with a particular access mode (read-only, write-only, or read-write).Some network objects provide specialized facilities such as filteringor promiscuous access (i.e. the pcap/bpf network object)or group membership (i.e. UDP/IP multicast).The C++ class <TT>Network</TT> is provided as a base class fromwhich specific network objects are derived.Three network objects are currently supported: pcap/bpf, raw IP,and UDP/IP.Each are described below.<P><BR><HR><!--Table of Child-Links--><A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></A><UL><LI><A NAME="tex2html9785" HREF="node546.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node546.html">39.4.1 Pcap/BPF Network Objects</A><UL><LI><A NAME="tex2html9786" HREF="node547.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node547.html">39.4.1.0.1 Configuration</A></UL><BR><LI><A NAME="tex2html9787" HREF="node548.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node548.html">39.4.2 IP Network Objects</A><UL><LI><A NAME="tex2html9788" HREF="node549.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node549.html">39.4.2.0.1 Configuration</A></UL><BR><LI><A NAME="tex2html9789" HREF="node550.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node550.html">39.4.3 IP/UDP Network Objects</A></UL><!--End of Table of Child-Links--><BR><HR><ADDRESS>2003-09-23</ADDRESS></BODY></HTML>⌨️ 快捷键说明
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