ipgrab.8

该程序类似于tcpdump软件

.TH IPGRAB 8 "24 February 1999"

.SH NAME
ipgrab \- A Verbose Packet Sniffer

.SH SYNOPSIS
\fBipgrab\fP [ -blmnpt ] [ -c \fIcnt\fP ] [ -i \fIif\fP ] [ \fiexpr\fP ]

.SH DESCRIPTION
\fIipgrab\fP reads and parses packets from the link layer through the
application layer, dumping explicit header information along the way.
It is a lot like \fItcpdump\fP except that it prints almost every
header field.

.SS Options
.TP
\fB-b\fP
Buffer standard output. Useful when you're redirecting output to a file.
.TP
\fB-l\fP
Don't print link-layer headers.
.TP
\fB-m\fP
Minimal IP/TCP/UDP output.
.TP
\fB-n\fP
Don't print network-layer headers.
.TP
\fB-p\fP
Print packet payloads.
.TP
\fB-t\fP
Don't print transport-layer headers.
.TP
\fB-c \fIcnt\fR
Terminate after receiving \fIcnt\fP packets.
.TP
\fB-i \fIif\fR
Listen on interface \fIif\fP, e.g., eth0.
.TP
\fBexpr\fP
Berkeley packet filter expression.  
See tcpdump(8) man page for details and examples.

.SH SEE ALSO
tcpdump(8)

.SH NOTES
Requires libpcap version 0.3 or greater to be installed.
Protocols completely supported include Ethernet, IP, TCP, UDP,
DNS, (R)ARP, IPX.  

.SH AUTHOR
Michael S. Borella
3Com Corp.
1800 W. Central Rd.
Mount Prospect IL 60563
[e-mail]

.SH BUGS
ICMP and DHCP/BOOTP support is not quite complete.  L2TP support is flaky.
RIP support is incomplete and SIP/SDP support is very rudimentary.