i386/167217: catch an over 1024 Bytes network packet through libpcap in C

[Shun-Hsiang Hu]

>Number:         167217
>Category:       i386
>Synopsis:       catch an over 1024 Bytes network packet through libpcap in C
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Apr 23 01:20:04 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Shun-Hsiang Hu
>Release:        7.0-release
>Organization:
National Taiwan University of Taiwan
>Environment:
FreeBSD test.twbbs.org 7.0-RELEASE FreeBSD 7.0-RELEASE #0: Sun Feb 24 19:59:52 UTC 2008     root at logan.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  i386

>Description:
I want develop a packet filter by C language, I develop the filter through an library what is libpcap, but i discover a problem. 

When I catch a network packet what is over 1024 bytes, the data what is over 1024 bytes will be loss, but the packet's length is true. 

I am not sure that is a bug or not, but the same program run on Ubuntu, it is no problem. Thank you
>How-To-Repeat:

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: