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<HTML><HEAD><TITLE>Xlib Programming Manual: Adding, Getting, or Removing Hosts</TITLE></HEAD><BODY><H1 ALIGN=center>9.8.1 Adding, Getting, or Removing Hosts</H1><P>Xlib provides functions that you can use to add, get, or remove hostsfrom the access control list.All the host access control functions use the <B>XHostAddress</B>structure, which contains:<P><!.IN "XHostAddress" "" "@DEF@"><CODE><PRE>typedef struct { int family; /* for example FamilyInternet */ int length; /* length of address, in bytes */ char *address; /* pointer to where to find the address */} XHostAddress;</PRE></CODE><P>The family member specifies which protocol address family to use (for example, TCP/IP or DECnet) and can be<B>FamilyInternet</B>,<B>FamilyDECnet</B>,or<B>FamilyChaos</B>.The length member specifies the length of the address in bytes.The address member specifies a pointer to the address.<P>For TCP/IP, the address should be in network byte order.For the DECnet family, the server performs no automatic swapping on the address bytes.A Phase IV address is two bytes long.The first byte contains the least-significant eight bits of the node number.The second byte contains the most-significant two bits of thenode number in the least-significant two bits of the byteand the area in the most-significant six bits of the byte.<P>To add a single host, use<B><A HREF="XAddHost.html">XAddHost()</A></B>.<P>To add multiple hosts at one time, use<B><A HREF="XAddHosts.html">XAddHosts()</A></B>.<P>To obtain a host list, use<B><A HREF="XListHosts.html">XListHosts()</A></B>.<P>To remove a single host, use<B><A HREF="XRemoveHost.html">XRemoveHost()</A></B>.<P>To remove multiple hosts at one time, use<B><A HREF="XRemoveHosts.html">XRemoveHosts()</A></B>.<H5 ALIGN=right><I>Next: <A HREF="access.html">Changing, Enabling, or Disabling Access Control</A></I></H5><HR><ADDRESS><A HREF="http://tronche.com/">Christophe Tronche</A>, <A HREF="mailto:ch.tronche@computer.org">ch.tronche@computer.org</A></ADDRESS></BODY></HTML>⌨️ 快捷键说明
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