netgraph: documentation issue? What kernel options? Where to find?

[Claude Buisson]

On 07/16/2017 22:48, O. Hartmann wrote:
> For a small SoC based system, I use a highly customised static kernel and build the
> system via NanoBSD with no kernel modules.
> 
> Tyring to track down some network issues with recent CURRENT I figured out, that when
> using the ppp client to connect via modem to the ISP and there is no
> 
> options	NETGRAPH_ETHER
> options	NETGRAPH_PPPOE
> 
> in the kernel configuration, the resulting system fails to establish a ppp session. The
> man page states, that a netgraph node is established, but as hard as I look, I can not
> find any(!) information in the man pages what options are necessary/optional to provide
> the correct module statically.
> 
> The same is for many other NETGRAPH_XXX features. Starting from man page "man 4
> netgraph", section "SEE ALSO", I started tweaking the kernel with NETGRAPH_XXX, i.e.
> ng_vlan -> NETGRAPH_VLAN until the compiler bails out with an error, for instance
> ng_car -> NETGRAPH_CAR.
> 
> I tried to find out what options cover which netgraph module but there is - right,
> nothing I can find on a direct route.
> 
> Since netgraph isn't so brand new (I guess ~ 2000 from the PDFs I found on the network),
> there must be some documentation other than "reading the source code".
> 
> Please give me some hints where to find the entry point for the appropriate documented
> options for netgraph modules.
> 
> Obviously, some ng_xxx modules are prerequisite for some services to work properly, as
> ppp - but I can't find any hints for "options NETGRAPH_ETHER" or "options NETGRAPH_PPPOE"
> in the manpages (looked at ppp, pppoed).
> 
> Thanks in advance,
> kind regards
> 
> Oliver
> 

Here, using ppoe:

/etc/ppp/ppp.conf
   ...
   set device PPPoE:re0
   ...

and I find:

# kldstat
  ...
  netgraph.ko
  ng_ether.ko
  ng_pppoe.ko
  ng_socket.ko
  ...

Hope this help

CBuisson