03-28-2008
Quote:
Originally Posted by
cleopard
There's a piece in a C program I'm writing (Linux) that simply needs to take a host name and return an IP address (e.g., take 'mail.gnu.org' and return 199.232.76.166). I've gotten a successful status from getaddrinfo, but don't see any of the fields in the result structure that has what I'm looking for, and similar for the structure returned by gethostbyname. I'm wondering if I need to use a function like 'inet_addr' on one of those values to get what I'm looking for. Thank you.
Post the C program because without the source it is not possible to figure out why the fields of the structure are not being filled. My guess would be that you have declared a pointer to that structure but not an object of that type. In any case it would be nice to see the code.
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LEARN ABOUT DEBIAN
arpspoof
ARPSPOOF(8) System Manager's Manual ARPSPOOF(8)
NAME
arpspoof - intercept packets on a switched LAN
SYNOPSIS
arpspoof [-i interface] [-c own|host|both] [-t target] [-r] host
DESCRIPTION
arpspoof redirects packets from a target host (or all hosts) on the LAN intended for another host on the LAN by forging ARP replies. This
is an extremely effective way of sniffing traffic on a switch.
Kernel IP forwarding (or a userland program which accomplishes the same, e.g. fragrouter(8)) must be turned on ahead of time.
OPTIONS
-i interface
Specify the interface to use.
-c own|host|both
Specify which hardware address t use when restoring the arp configuration; while cleaning up, packets can be send with the own
address as well as with the address of the host. Sending packets with a fake hw address can disrupt connectivity with certain
switch/ap/bridge configurations, however it works more reliably than using the own address, which is the default way arpspoof cleans
up afterwards.
-t target
Specify a particular host to ARP poison (if not specified, all hosts on the LAN). Repeat to specify multiple hosts.
-r Poison both hosts (host and target) to capture traffic in both directions. (only valid in conjuntion with -t)
host Specify the host you wish to intercept packets for (usually the local gateway).
SEE ALSO
dsniff(8), fragrouter(8)
AUTHOR
Dug Song <dugsong@monkey.org>
ARPSPOOF(8)