cvs commit: src/sbin/dhclient bpf.c

Brooks Davis brooks at
Thu Sep 28 20:07:43 PDT 2006

brooks      2006-09-29 03:07:41 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_6)
    sbin/dhclient        bpf.c 
  MFC rev 1.7
    It is possible for bpf to return a length such that:
           length != BPF_WORDALIGN(length)
    This meeans that it is possible for this to be true:
           interface->rbuf_offset > interface->rbuf_len
    Handle this case in the test for running out of packets.  While
    OpenBSD's solution of setting interface->rbuf_len to
    BPF_WORDALIGN(length) is safe due to the size of the buffer, I think
    this solution results in less hidden assumptions.
    This should fix the problem of dhclient running away and consuming 100%
  PR:             bin/102226
  Submitted by:   Joost Bekkers <joost at>
  Approved by:    re (ken)
  Revision  Changes    Path   +1 -1      src/sbin/dhclient/bpf.c

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