Re: tcpdump 4.0.0rc3 and libpcap 1.0.0rc3 now available

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

On Oct 27, 2008, at 6:28 PM, Michael Richardson wrote:

> I tried building the library before signing it:
>
> marajade-[Misc/tcpdump/4.0/libpcap-1.0.0] mcr 1039 %make
> gcc -O2 -fPIC -I.  -DHAVE_CONFIG_H  -D_U_="__attribute__((unused))" - 
> c ./pcap-linux.c
> ./pcap-linux.c: In function 'pcap_read_packet':
> ./pcap-linux.c:653: error: invalid application of 'sizeof' to  
> incomplete type 'struct tpacket_auxdata'

Sigh.  More of the Perils Of Writing Code For the Latest Shiniest  
Version Of {fill in your OS} And Not Carefully Conditionalizing The  
Use Of Features That Might Not Be In Every Relevant Release Of That  
OS; it was assuming your Linux had the tpacket_auxdata structure, but  
apparently it doesn't.

(What kernel version does your machine have?  My test (virtual)  
machines might have newer kernels; at least one of them has that  
structure but doesn't have a tp_vlan_tci member in it, so I had to fix  
*that*, but I guess none of them lack the structure entirely.)

I've checked in a change that should fix that (by reverting to the old  
code if the kernel lacks that structure or lacks a tp_vlan_tci member  
in that structure); see whether it compiles now.  (If not, I won't be  
able to address it immediately, but should be able to get to it later  
tonight.)
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