http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/wvstreams/wvipaliaser.h

/* -*- Mode: C++ -*- * Worldvisions Weaver Software: * Copyright (C) 1997-2002 Net Integration Technologies, Inc. * */ #ifndef __WVIPALIASER_H #define __WVIPALIASER_H #include "wvinterface.h" #include "wvaddr.h" /** * WvIPAliaser handles IP aliasing in the Linux kernel. Multiple instances * of the object can be created, and they will share aliases between them. * Aliased addresses are only removed when all WvIPAliaser objects using * that address give it up. (ie. the object is destroyed, or the Aliaser * is reconfigured without including that address) */ class WvIPAliaser { struct Alias { int index, link_count; WvIPAddr ip; Alias(const WvIPAddr &_ip); ~Alias(); }; DeclareWvList(Alias); static AliasList all_aliases; AliasList aliases; WvInterfaceDict interfaces; WvIPAliaser::Alias *ipsearch(WvIPAliaser::AliasList &l, const WvIPAddr &ip); public: WvIPAliaser(); ~WvIPAliaser(); void dump(); /** * you must call start_edit() once, then add() any number of times, then * done_edit() once, to change your aliases. The addresses add()ed * during the session become the _only_ ones that are aliases by this * WvIPAliaser instance. * * Why bother? This way, WvIPAliaser can see all the desired aliases * when they are being changed, and only delete previously-added ones * if they are no longer used. This is important, since if eg. Fast * Forward has an open connection through 1.2.3.4, and we want to add * 1.2.3.5 and delete 1.2.3.3, Fast Forward need not remember that it * was using 1.2.3.3 but 1.2.3.4 does not get deleted, even temporarily. * * If that was too confusing, just remember: call these functions in * the order they appear below, always. * * If add() returns true, then an interface was just created. If it returns * false, then that call made no changes. * * If done_edit() returns true, then one or more interfaces were just * destroyed. If it returns false, then that call made no changes. */ void start_edit(); bool add(const WvIPAddr &ip); bool done_edit(); }; #endif // __WVIPALIASER_H