Am 13.09.2010 16:30, Franz Engel wrote: > Hello, > > I have an problem and after one week I'm at one's wits' end. I wrote a client > that send a raw message to a second system. That works. Now I want to wait > for a > request form the second system befor I send my message. The second system > sends > an broadcast, but my program isn't able to receive that. Here is my code:
Already tried to capture the traffic as it leaves on the one node and
arrives on the other via RTcap?
Moreover, it looks like your a building IP frames. Who is supposed to
process them on receiver side, the RTnet IP layer or another raw socket
application? If the latter, did you disabled/unloaded the former? If the
former, check if netmasks are correct.
Jan
>
> RT_TASK *lxrtnettsk;
> char msg[60];
> char msgRecv[60];
>
> unsigned char src_mac[6] = {0x00, 0x10, 0xa7, 0x23, 0x4f, 0x17};
> int transmittionTime=1000;//Zeit in Milisekunden
> int sendLoops = 2;
>
> static struct sockaddr_ll newAddr;
> struct ifreq newIfr;
>
> struct ether_header *eth = (struct ether_header *)msg;
>
> int ret = 0;
> int newSocket = 0;
> int count = 0;
>
> sprintf(msg, "Used RTAI, RTnet and UDP!");
> system("sh ModuleEinbindenJitterTestXPC.sh");
> cout << msg << endl;
>
> mlockall(MCL_CURRENT|MCL_FUTURE);
> memset(eth->ether_dhost, 0xFF, ETH_HLEN);
> eth->ether_type=htons(0x1234);
> strncpy(newIfr.ifr_name, "rteth0", IFNAMSIZ);
> newSocket = rt_dev_socket(AF_PACKET, SOCK_RAW, 0);
>
>
> //RAW communication
> newAddr.sll_family = PF_PACKET;
> newAddr.sll_protocol = htons(ETH_P_IP);
> newAddr.sll_ifindex= 2;
> newAddr.sll_hatype = 1;//ARPHRD_ETHER;
> newAddr.sll_pkttype = PACKET_OTHERHOST;
> newAddr.sll_halen = ETH_ALEN;
>
> //MAC - Begin
> newAddr.sll_addr[0] = src_mac[0];
> newAddr.sll_addr[1] = src_mac[1];
> newAddr.sll_addr[2] = src_mac[2];
> newAddr.sll_addr[3] = src_mac[3];
> newAddr.sll_addr[4] = src_mac[4];
> newAddr.sll_addr[5] = src_mac[5];
> //MAC - End
> newAddr.sll_addr[6] = 0x00; //not used
> newAddr.sll_addr[7] = 0x00; //not used
>
> lxrtnettsk = rt_task_init(4800, 1, 0, 0);
> if (NULL == lxrtnettsk)
> {
> rt_dev_close(newSocket);
> printf("CANNOT INIT MASTER TASK\n");
> exit(1);
> }
> rt_make_hard_real_time();
> start_rt_timer(0);
> ret = rt_dev_bind(newSocket, (struct sockaddr *)&newAddr, sizeof(newAddr));
> cout << "newBind: " << ret << endl;
> while(count<sendLoops)
> {
> ret = rt_dev_recv(newSocket, msgRecv, 60, 0);
> ret = rt_dev_send(newSocket, msg, sizeof(msg), 0);
> rt_sleep(1000000);
> count++;
> }
>
> rt_make_soft_real_time();
> rt_dev_close(newSocket);
> rt_task_delete(lxrtnettsk);
>
> Some Ideas?
>
> Regards,
> Franz
>
>
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