[ale] Compile problems.

[jj at spiderentertainment.com]

I'm sure most of you seen/heard of the IRDP spoofing thing which affects
MS DHCP. The company for whom I work has been using MS DHCP for a while
now, and they do not wish to switch to UNIX... I tried many times, but
they are *hard headed*... anyways...

This IRDP thing, what it does is this: it spoofs the ICMP packets for
the default route advertisment, which in turn shuts you down. The way to
fix this is to disable ICMP packet type 9 and 10(so they say). I wish to
test this, so I found a source crack for this... But I think they
intended it for BSD, I'm running linux and NT.. I tried to change it as
much as I can to port it to linux. Now I have this problem, and I'm not
sure where to go from here...

when I execute gcc icmp_ird.c
I receive this:
/tmp/cca032061.o: In function `main':
/tmp/cca032061.o(.text+0x1dd): undefined reference to
`libnet_name_resolve'
/tmp/cca032061.o(.text+0x1f5): undefined reference to
`libnet_name_resolve'
/tmp/cca032061.o(.text+0x20d): undefined reference to
`libnet_name_resolve'
/tmp/cca032061.o(.text+0x225): undefined reference to
`libnet_name_resolve'
/tmp/cca032061.o(.text+0x2bf): undefined reference to
`libnet_open_raw_sock'
/tmp/cca032061.o(.text+0x315): undefined reference to `pcap_next'
/tmp/cca032061.o: In function `getCaptureDev':
/tmp/cca032061.o(.text+0x7c6): undefined reference to `pcap_open_live'
/tmp/cca032061.o(.text+0x81c): undefined reference to `pcap_setfilter'
/tmp/cca032061.o: In function `send_icmp_rdisc_response':
/tmp/cca032061.o(.text+0x929): undefined reference to `libnet_build_ip'
/tmp/cca032061.o(.text+0xa4c): undefined reference to
`libnet_do_checksum'
/tmp/cca032061.o(.text+0xa8c): undefined reference to `libnet_write_ip

now I know that undefined reference means, no function, but I checked
the headers of each include file, and well.. I just don't know where to
go ....