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From: Brian Somers <brian@FreeBSD.ORG>
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Date: Mon, 26 Oct 1998 11:07:37 -0800 (PST)
Message-Id: <199810261907.LAA18488@freefall.freebsd.org>
To: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG
Subject: cvs commit: src/usr.sbin/ppp command.c iface.c ppp.8
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brian       1998/10/26 11:07:37 PST

  Modified files:
    usr.sbin/ppp         command.c iface.c ppp.8 
  Log:
  Fix the interface alias code.  Previously, I was expecting something
  like
  
  tun0: flags=blah
  	10.0.0.1 -> 10.0.0.100
  	10.0.0.2 -> 10.0.0.100
  	10.0.0.3 -> 10.0.0.100
  
  to DTRT, despite the SIOCAIFADDR for each new alias returning
  -1 & EEXIST while adding the alias anyway.  In real life, once
  we have the second alias with the same destination, nothing will
  route any more !  Also, because I was ignoring EEXIST, the
  dynamic IP assignment code was assigning duplicate addresses
  ('cos it was being lied to by iface_inAdd()).
  
  Now we have
  
  tun0: flags=blah
  	10.0.0.1 -> 255.255.255.255
  	10.0.0.2 -> 10.0.0.100
  	10.0.0.3 -> 255.255.255.255
  
  This works - stuff bound to 10.1 & 10.3 will be considered alive
  by the kernel, and when they route back to the tun device, the
  packets get aliased to 10.2 and go out to 10.100 (as with the
  original plan).
  
  We still see the EEXIST in SIOCAIFADDR, but ignore it when our
  destination is 255.255.255.255, assuming that the alias *was*
  actually added.
  
  Additionally, ``iface add'' may now optionally be given only
  the interface address.  The mask & destination default to
  255.255.255.255.
  
  Revision  Changes    Path
  1.170     +19 -13    src/usr.sbin/ppp/command.c
  1.2       +62 -12    src/usr.sbin/ppp/iface.c
  1.128     +16 -2     src/usr.sbin/ppp/ppp.8

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