I do not have any explanation why this lines are there... I have nothing to
do with those IP addresses.
>RTnet: host 222.83.167.242 unreachable
>RTnet: no protocol found
>RTnet: no protocol found
I have particularly added the IP address that I needed in the host table and
rtping worked correctly, though it was showing the round trip time is equal
to 0... I do not know why... but it can ping the desired IP...
>From: "Emanuele Clerici" <[EMAIL PROTECTED]>
>To: "Monotosh Das" <[EMAIL PROTECTED]>
>Subject: Re: [RTnet-users] Revceiving UDP/IP data in user space using RTAI
>LXRT
>Date: Fri, 19 Jan 2007 16:32:34 +0100
>
>what about this message?
>RTnet: host 222.83.167.242 unreachable
>RTnet: no protocol found
>RTnet: no protocol found
>
>did you set up correctly rtnet? does rtping works fine?
>
>Emanuele
>
>On 1/19/07, Monotosh Das <[EMAIL PROTECTED]> wrote:
>>Sorry for the previous unexpected line wrap... this time hopefully this
>>will
>>work...
>>please note that I am trying to communicate periodically with an
>>application
>>running standard winsock UDP/IP socket on windows machine....Please
>>rectify
>>if I have made any fundamental error...
>>
>>The source code...
>>
>>
>>static struct sockaddr_in local_addr;
>>static struct sockaddr_in server_addr;
>>static void *SendRcvFun(void *arg)
>>{
>> RT_TASK *handler; //local handler
>> static struct {
>> unsigned long indx;
>> RTIME time;
>> } msg = {0,0};
>> int sockfd = 0;
>> int ret = 0;
>> char msgStr[100] = "Hello world";
>> /* Set variables to zero. */
>> memset(msgStr, 0, sizeof(msgStr));
>> memset(&local_addr, 0, sizeof (struct sockaddr_in));
>> memset(&server_addr, 0, sizeof(struct sockaddr_in));
>> printf("RTnet, simpleserver for LXRT\n");
>>
>> /* Check arguments and set addresses. */
>>
>> local_addr.sin_family = AF_INET;
>> local_addr.sin_addr.s_addr = INADDR_ANY;
>> local_addr.sin_port = htons(11000);//htons(atoi(11000));
>>
>> server_addr.sin_family = AF_INET;
>> inet_aton("139.30.6.66", &server_addr.sin_addr);
>> server_addr.sin_port = htons(11000);
>>
>>
>> printf("SendRcv Start\n");
>> rtf_create(FIFO, 2000);
>> printf("FIFO created\n");
>> mlockall(MCL_CURRENT | MCL_FUTURE);
>> sockfd = rt_dev_socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
>> if (sockfd < 0) {
>> printf("Error opening socket: %d\n", sockfd);
>> exit(1);
>> }
>>
>> //
>> if (!(handler= rt_task_init_schmod(nam2num("SRTSK"), 0, 0,
>>0,SCHED_FIFO,
>>0xFF))) {
>> printf("CANNOT INIT SendRcvFun\n");
>> rt_dev_close(sockfd);
>> exit(1);
>> }
>> rt_set_periodic_mode();
>> start_rt_timer(0);
>> period = start_rt_timer(nano2count(TIMERTICKS));
>> rt_task_make_periodic(handler, rt_get_time()+period, period);
>>
>> rt_make_hard_real_time();
>> /* Bind socket to local address specified as parameter. */
>> ret = rt_dev_bind(sockfd, (struct sockaddr *) &local_addr,
>>sizeof(struct
>>sockaddr_in));
>> /* Specify destination address for socket; needed for
>>rt_socket_send().
>>*/
>> rt_dev_connect(sockfd, (struct sockaddr *) &server_addr,
>>sizeof(struct
>>sockaddr_in));
>> endSendRcvFun = 0;
>>
>> while (!endSendRcvFun) {
>> ret = rt_dev_recv(sockfd, msgStr, sizeof(msgStr),
>>MSG_DONTWAIT);
>> ret = rt_dev_send(sockfd, msgStr, sizeof(msgStr),
>>MSG_DONTWAIT);
>> msg.indx = ret;
>> msg.time = rt_get_time_ns();
>> rtf_put(FIFO, &msg, sizeof(msg));
>> //printk("h");
>> rt_task_wait_period();
>> }
>> stop_rt_timer();
>> rt_make_soft_real_time();
>> rt_dev_close(sockfd);
>> rt_task_delete(handler);
>> rtf_destroy(FIFO);
>> return 0;
>>}
>>
>>
>>I suspect the error occurs when I insert the code
>>ret = rt_dev_recv(sockfd, msgStr, sizeof(msgStr), MSG_DONTWAIT);
>>
>>The error reported by the dmesg...
>>
>>*** RTnet 0.9.8 - built on Jan 12 2007 20:25:45 ***
>>
>>RTnet: initialising real-time networking
>>initializing loopback...
>>RTnet: registered rtlo
>>ACPI: PCI Interrupt 0000:02:08.0[A] -> Link [LNKD] -> GSI 9 (level, low)
>>->
>>IRQ 9
>>rteth0: OEM i82557/i82558 10/100 Ethernet, 00:30:05:08:51:74, IRQ 9.
>>RTnet: registered rteth0
>>RTnet: host 222.83.167.242 unreachable
>>RTnet: no protocol found
>>RTnet: no protocol found
>>RTnet: no protocol found
>>RTnet: no protocol found
>>
>>LXRT CHANGED MODE (TRAP), PID = 4313, VEC = 14, SIGNO = 11.
>>BUG: unable to handle kernel NULL pointer dereference at virtual address
>>00000024
>>printing eip:
>>d0f666be
>>*pde = 00000000
>>Oops: 0000 [#1]
>>PREEMPT
>>Modules linked in: rt_eepro100 rt_loopback rtipv4 rtnet rtai_rtdm
>>rtai_fifos
>>rtai_sem rtai_lxrt rtai_hal button battery ac loop dm_mod bttv video_buf
>>firmware_class ir_common compat_ioctl32 i2c_algo_bit v4l2_common btcx_risc
>>tveeprom videodev mii intel_agp agpgart ide_cd uhci_hcd cdrom usbcore
>>i8xx_tco i2c_i801 shpchp i2c_core pci_hotplug parport_pc lp parport ext3
>>mbcache jbd edd fan sg aic7xxx scsi_transport_spi piix thermal processor
>>sd_mod scsi_mod ide_disk ide_core
>>CPU: 0
>>EIP: 0060:[<d0f666be>] Not tainted VLI
>>EFLAGS: 00013246 (2.6.17-RTAI #1)
>>EIP is at rt_udp_recvmsg+0xd6/0x1b8 [rtipv4]
>>eax: 00000000 ebx: cf82e5f4 ecx: 00003246 edx: 00000000
>>esi: 00000000 edi: ca401ee8 ebp: c60c4a90 esp: ca401e84
>>ds: 007b es: 007b ss: 0068
>>Process udpsendReceive (pid: 4313, threadinfo=ca400000 task=c60c4a90)
>>Stack: cf82e618 ffffffff ffffffff 00000000 cf82e618 00000064 cf82e604
>>cf82e5e0
>> 00000040 ca401ee8 c60c4a90 d0f6d666 cf82e5e0 c60c4a90 ca401ee8
>>00000040
>> fffffff2 ca401ee8 b7e1d2e0 c60c4a90 d0f6e940 c60c4a90 00000000
>>ca401ee8
>>Call Trace:
>><d0f6d666> _rtdm_recvmsg+0x4e/0x70 [rtai_rtdm] <d0f6e940>
>>sys_rtdm_recvmsg+0x5e/0x82 [rtai_rtdm]
>><d0f8083f> rtai_lxrt_invoke+0x151/0x10c6 [rtai_lxrt] <d0f83be3>
>>rt_task_make_periodic+0x0/0xed [rtai_lxrt]
>><d0f6e8e2> sys_rtdm_recvmsg+0x0/0x82 [rtai_rtdm] <c01176b1>
>>sched_setscheduler+0x22c/0x269
>><c0142e8d> __ipipe_dispatch_event+0x32/0x10d <d0f58053>
>>rtai_syscall_dispatcher+0x55/0xeb [rtai_hal]
>><d0f5707e> rtai_uvec_handler+0x1a/0x30 [rtai_hal]
>>Code: 00 8b 7c 24 14 e9 a9 00 00 00 8d 73 10 89 74 24 18 9c 59 fa 8b 73 10
>>85 f6 74 0e 8b 56 04 8b 02 89 43 10 c7 02 00 00 00 00 51 9d <8b> 4e 24 0f
>>b7
>>51 04 0f b6 c2 c1 e0 08 c1 ea 08 09 d0 8d 68 f8
>>EIP: [<d0f666be>] rt_udp_recvmsg+0xd6/0x1b8 [rtipv4] SS:ESP 0068:ca401e84
>>LXRT releases PID 4313 (ID: udpsendReceive).
>>
>>_________________________________________________________________
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>>
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