Perhaps I should clarify: You are binding a PF_PACKET socket to an
AF_INET address. Try me.sll_family = AF_PACKET instead.
Amit Kucheria wrote:
> 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
>
>
--
Casey Carter
Casey@Carter.net
ccarter@uiuc.edu
AIM: cartec69
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