Re: libpcap: patches required for OpenSolaris/SXCE

[Guy Harris <guy () alum mit edu>]

On Nov 29, 2009, at 11:43 PM, Darren Reed wrote:

> Doing some further testing of DLT lists, get_dlt_list() needs
> some further work. On an OpenSolaris host with ethernet
> and a tunnel created, they're visible here:
>
> # dladm show-link
> LINK        CLASS     MTU    STATE    BRIDGE     OVER
> igb0        phys      1500   up       --         --
> e1000g0     phys      1500   up       --         --
> e1000g1     phys      1500   up       --         --
> igb1        phys      1500   up       --         --
> vnic0       vnic      1500   up       --         e1000g0
> tun0        iptun     65515  down     --         --

What does "ifconfig tun0" print?  libpcap should ignore interfaces  
that don't have IFF_UP set.
> # tcpdump -L
> Data link types (use option -y to set):
> IPNET (Solaris IPNET)
> RAW (Raw IP)

What does "tcpdump -D" print?

> When there is no network interface specified with
> -i, what I expect from "tcpdump -L" is for tcpdump to
> list all of the DLTs that are available for selection
> with -y.

What you *should* expect is all the DLTs *that are available for the  
default interface*.  "All of the DLTs that are available for selection  
with -y" is meaningless without specifying an interface - you can't  
select an DLT until you've first selected an interface, and if you  
don't select an interface, the first interface available in the  
"tcpdump -D" list is chosen by default.

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