Messages in this thread | | | From | sjw44@eng ... | Subject | Re: Userlevel ARP request | Date | Tue, 31 Aug 1999 16:42:58 +0100 (BST) |
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Mike Panetta wrote: > > Does the socket code in the kernel allow one to do a userlevel > arp? I want to create a user level "arp ping" type program > that if given an IP will report wether or not a machine is on that address > given an arp reply on the IP. Is this possible? This is to work around > a windows TCP/IP "bug"... > > -- > Mike Panetta > Hi,
yes this can be done with a PF_PACKET socket. You have a choice of SOCK_RAW (with datalink headers) or SOCK_DGRAM (a slightly more cooked mode of operation). Probably you would do something like:
s = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ARP));
You can restrict this to a single device with bind() too if you want to. man 4 packet has more information,
Steve.
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