On Sat, Apr 08, 2000 at 12:38:13AM -0700, Ben Greear wrote:
> I can't seem to find any documentation anywhere on this....
>
> I want to use the new PF_PACKET and SOCK_RAW options to create
> a socket that I can send raw ethernet frames on. SOCK_PACKET
> was working ok for me, but it's deprecated, evidently, and
> it wasn't working on eth8, so I figured it was time to upgrade...
Although it is deprecated that would be a bug.
>
> Also, using SIOCGIFINDEX, looking for eth1, gives me '3', when the
> only interfaces shown by ifconfig -a are eth0, eth1, and lo (in that order).
> Is that correct?
Yes, interface indexes count all interfaces. See netdevice(7) for details.
They have nothing to do with the name.
> sendto gives this error every time: sendto: Invalid argument
> To send I use this:
> int foo::sendPktTo(int dev_socket, const char* dev, const char* msg,
> int msg_len) {
> int r = 0;
>
> struct sockaddr from;
> memset(&from, 0, sizeof(from));
> from.sa_family = AF_INET;
SOCK_PACKET obviously does not like AF_INET addresses and tells you that.
Try it with AF_PACKET
> strcpy(from.sa_data, dev);
>
> r = sendto(dev_socket, msg, msg_len, 0, &from, fromlen);
> if (r < 0) {
> VLOG << "ERROR: foo::sendto: " << strerror(errno) << endl;
> }
-Andi
-
To unsubscribe from this list: send the line "unsubscribe linux-net" in
the body of a message to [EMAIL PROTECTED]
