cvs commit: src/lib/libpcap config.h src/sys/net bpf.c

[Ed Schouten]

ed          2008-08-13 15:41:21 UTC

  FreeBSD src repository

  Modified files:
    lib/libpcap          config.h 
    sys/net              bpf.c 
  Log:
  SVN rev 181690 on 2008-08-13 15:41:21Z by ed
  
  Change bpf(4) to use the cdevpriv API.
  
  Right now the bpf(4) driver uses the cloning API to generate /dev/bpf%u.
  When an application such as tcpdump needs a BPF, it opens /dev/bpf0,
  /dev/bpf1, etc. until it opens the first available device node. We used
  this approach, because our devfs implementation didn't allow
  per-descriptor data.
  
  Now that we can, make it use devfs_get_cdevpriv() to obtain the private
  data. To remain compatible with the existing implementation, add a
  symlink from /dev/bpf0 to /dev/bpf. I've already changed libpcap to
  compile with HAVE_CLONING_BPF, which makes it use /dev/bpf. There may be
  other applications in the base system (dhclient) that use the loop to
  obtain a valid bpf.
  
  Discussed on:   src-committers
  Approved by:    csjp
  
  Revision  Changes    Path
  1.7       +1 -1      src/lib/libpcap/config.h
  1.200     +62 -80    src/sys/net/bpf.c