Layer 2 Packet sending in Vayu EVM with GLSDK 6.04

Hi Sarah,

Could you give a little bit more information? What is your setup?

What command do you use to send a packet? What is the configuration of the ethenret interface on your DRA7xx board?
Have you by any chance modified the cpsw driver, enabling some kind of filtering ?

Is this issue present with the latest GLSDK7.0 (a lot of updates and bug fixes were applied since GLSDK6.04)?

Best Regards,
Yordan

Dear Yordan,

                      Thanks, sorry to be unclear.

I do a sample code of packing  a ethernet packet. and open a raw socket with multicast as " PACKET_MR_ALLMULTI"

and started sending the packet from the PC to the vayu board . and could not receive the packet. bothside I do the same.

socketfd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));

u8temp_i = ioctl(socketfd, SIOCGIFINDEX, &ifr);

if (u8temp_i < 0)

{

printf("Error getting the interface index%s,%d\n",strerror(errno),errno);

}

else

{

device.sll_ifindex = ifr.ifr_ifindex;

/* Use ioctl() to look up interface name and get its MAC address. */

u8temp_i = ioctl(socketfd,SIOCGIFHWADDR, &ifr);

if(u8temp_i < 0)

{

printf("Error getting MAC address\n");

}

else

{

/* Copy the appropriate MAC address to cencerned variables */

for(u8temp_i = 0; u8temp_i < 6; u8temp_i++)

{

u8SMAC[u8temp_i] = ifr.ifr_hwaddr.sa_data[u8temp_i];

}

}

}

              setsockopt( socketfd, SOL_SOCKET,SO_BINDTODEVICE,"eth0",5);

               mr.mr_ifindex = device.sll_ifindex;

             //  mr.mr_type = PACKET_MR_ALLMULTI;

                mr.mr_type = PACKET_MR_MULTICAST;

                     mr.mr_alen = 6;

               memcpy(mr.mr_address,dest,6);

               setsockopt( socketfd, SOL_PACKET,PACKET_ADD_MEMBERSHIP, &mr, sizeof(mr));

               //      if(Sock_opt<0)

               //              INFO("failed\n");

               /* Prepare sockaddr_ll for RAW communication */

               device.sll_family   = AF_PACKET;

               /* ARP hardware identifier is ethernet */

               device.sll_protocol = htons(ETH_P_ALL);

               /* index of the network  */

               device.sll_ifindex  = device.sll_ifindex;

               /* we don't use a protocoll above ethernet layer */

               device.sll_hatype   = ARPHRD_ETHER;

               /* target is another host */

               device.sll_pkttype  = PACKET_OTHERHOST;

               /* address length */

               device.sll_halen    = ETH_ALEN;

               bind(socketfd,(struct sockaddr*)&device,sizeof(device));

               /* Destination MAC */

               /*

                  for(u8temp_i = 0; u8temp_i < MAC_ADDRESS_SIZE; u8temp_i++)

                  {

                  Net.device.sll_addr[u8temp_i] = Net.u8MMAC[u8temp_i];

                  }

                */

               device.sll_addr[0] = 0x01;

               device.sll_addr[1] = 0x80;

               device.sll_addr[2] = 0xc2;

               device.sll_addr[3] = 0x00;

               device.sll_addr[4] = 0x00;

               device.sll_addr[5] = 0x0E;

But I could not receive the packet in the board ,

Now I have done a different thing I made the PACKET_MR_ALLMULT to PACKET_MR_MULTICAST with the multicast address and now I can receive it ..

Does the cpsw filter out the PACKET_MR_ALLMULT packets

I find some code  in cpsw.c

/*
         * The switch cannot filter multicast traffic unless it is configured
         * in "VLAN Aware" mode.  Unfortunately, VLAN awareness requires a
         * whole bunch of additional logic that this driver does not implement
         * at present.
         */
        if ((flags & IFF_ALLMULTI) && !(ndev->flags & IFF_ALLMULTI))
                dev_err(&ndev->dev, "multicast traffic cannot be filtered!\n");

Thanks and Regards,

Sarah