> hi there!
>
> can anybody here tell me how can i send and receive ethernet packets
> directly on layer 2 under linux?
I'm not an expert on the subject, so i can't say if you are looking at
your problem in a sensible way, but i am using the following to open
a socket for reading packets from an ethernet i/f. So far as i know this
is fairly non-portable! :)
MJW.
> int fd;
> struct ifreq netintreq;
>
> if ((fd = socket(AF_INET, SOCK_PACKET, htons(ETH_P_ALL))) < 0) {
> perror("cant get SOCK_PACKET socket");
> return(-1);
> }
>
> strcpy(netintreq.ifr_name, ethnetintname);
> if (ioctl(fd, SIOCGIFFLAGS, &netintreq) < 0) {
> close(fd);
> perror("cant get flags");
> return(-1);
> }
>
> netintreq.ifr_flags |= IFF_PROMISC;
> if (ioctl(fd, SIOCSIFFLAGS, &netintreq) < 0)
> perror("cant set promiscuous mode");
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