On Sat, 15 Dec 2001, Casey Carter wrote:
> AF_INET?
>
> Amit Kucheria wrote:
>
> > Can anybody explain whats wrong with the following piece of code?
> >
> > Specifically, the bind() fails. I have a clue that its something to do
> > with packet sockets, but what ? I checked my kernel, packet sockets are
> > compiled in.
> >
> > -------------------------------------------------
> > struct sockaddr_ll me, he;
> >
> > int main(int argc, char *argv[])
> > {
> > struct sockaddr hwaddr;
> >
> > if (argc < 2)
> > {
> > usage(argv[0]);
> > exit(1);
> > }
> > strcpy(device, argv[1]);
> >
> > sockfd = socket(PF_PACKET, SOCK_DGRAM, 0);
> > if (sockfd < 0)
> > {
> > DBG("main(): unable to create socket\n");
> > perror("main()");
> > return -1;
> > }
> >
> > req_dest.s_addr = address_generate(); /* linklocal address we want to own */
> > req_src.s_addr = 0; /* send with IP addr 0.0.0.0 */
> >
> > ret = get_ether_addr(device, &hwaddr);
> > if (ret < 0)
> > {
> > ERR("main(): get_ether_addr failed\n");
> > exit(-1);
> > }
> > me.sll_family = AF_INET;
> > me.sll_ifindex = ifindex;
> > me.sll_protocol = htons(ETH_P_ARP);
> > if (bind(sockfd, (struct sockaddr*)&me, sizeof(me)) == -1)
> > {
> > perror("main(): bind");
> > exit(2);
> > }
But i need to use PF_PACKET type to create a socket to 'bypass' the
protocol layers and send the packet directly to the ethernet layer (link
layer). I dont think AF_INET with SOCK_RAW would support struct
sockaddr_ll.
Regards,
Amit
--
The statement below is true.
The statement above is false.
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Amit Kucheria
EECS Grad. Research Assistant
University of Kansas @ Lawrence
(R)+1-(785)-830 8521 ||| (O)+1-(785)-864 7774
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