Date
1 - 12 of 12
Need help in establishing client-server socket communication between my Ubuntu PC and PCA10056 board, on which Zephyr is running. #nrf52840 #samples
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giriprasad@...
Hi Team,
I am running tcp socket client program in Ubuntu bash of Windows subsystem for Linux and server program on PCA10056 board, on which zephyr is running. I am able to establish connection and transfer data between server and client. Please observe the zephyr debug log of this, in the file attached with name "socket_connection_log_zephyr_server_wsl_client.txt". Also observe the log of wireshark running on Windows PC. File name is "ws_log_sock_conn_zephyr_server_wsl_client.png" After this, I have tried running the client code in the PC which is running on Ubuntu OS. But, this time I am unable to establish connection between my PC and PCA10056. Please observe the zephyr debug log of this, in the file attached with name "socket_connection_log_zephyr_server_ubuntu_client.txt". Also observe the log of wireshark running on Ubuntu PC. File name is "ws_log_sock_conn_zephyr_server_ubuntu_client.png". I am unsure of this behavior. Please help me to establish connection between Ubuntu PC and PCA10056. Please let me know, if more information is needed. Thanks & Regards, Giri Prasad N.
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Jukka Rissanen
Hi,
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The text logs do not reveal anything useful (other than the zephyr version used and that you are using ethernet + dhcp). From the wireshark image, we can see that ubuntu does not receive the SYN,ACK that zephyr sends as ubuntu tries to send SYN multiple times. Perhaps there is a firewall that blocks the connection? Cheers, Jukka
On Mon, 2019-09-23 at 23:59 -0700, giriprasad@... wrote:
Hi Team,
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giriprasad@...
Hi,
Thanks for the reply. I have verified the ufw status and it is inactive. Is it enough to say that firewall is disabled. Regards, Giri
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Jukka Rissanen
Hi Giri,
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You could also verify from wireshark that the MAC addresses are correctly set in the packets. If zephyr sends a packet using wrong destination MAC address, then your ubuntu would not receive it. Cheers, Jukka
On Tue, 2019-09-24 at 02:20 -0700, giriprasad@... wrote:
Hi,
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giriprasad@...
Hi Jukka,
I have verified the MAC address. Zephyr is sending the [SYN/ACK] packet with destination MAC address as "ff:ff:ff:ff:ff:ff", which is a broadcast address. Does this causing my ubuntu to not receive the packets? Thanks & Regards, Giri
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Jukka Rissanen
Hi Giri, yes, that is definitely a problem. The destination MAC address should be a valid unicast address. Does you ethernet board have a proper MAC address set to it? You can see the MAC address using "net iface" command in net-shell. Cheers, Jukka
On Tue, 2019-09-24 at 05:52 -0700, giriprasad@... wrote: Hi Jukka,
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giriprasad@...
Hi Jukka,
"net iface" is returning a valid mac address. But for my Ethernet to work, I have tweaked Zephyr code. I have posted about it in another topic of this mailing list. Please follow this link https://lists.zephyrproject.org/g/devel/message/6325 Please let me understand the problem I am facing, as mentioned in the above link. I am suspecting that, this is causing the issue. Please help me in this regards. Thanks & regards, Giri.
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Jukka Rissanen
The changes that you do there basically turn off ARP, the end result is that the IPv4 connectivity cannot work properly after this. Cheers, Jukka
On Wed, 2019-09-25 at 04:15 -0700, giriprasad@... wrote: Hi Jukka,
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Marc Herbert
On 24 Sep 2019, at 02:20, giriprasad@... wrote:It should but might not be enough because ufw is just a user interface. Use "ip[6]tables -L" to verify the actual state.
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giriprasad@...
But, without those changes, if I am trying to ping the board on which Zephyr is running, it is not responding to ping requests and wireshark capture in this scenario can be found in the attached file. I am unable to figure out where the mistake is happening. I have been trying in different ways but in vain. Is there any suggestions or check points to resolve this issue. Please help...
Thanks & Regards, Giri Prasad N.
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Jukka Rissanen
Hi Giri, can you create an issue in github for this. Trying to resolve your issue in mailing list is not very effective. Cheers, Jukka
On Thu, 2019-09-26 at 02:19 -0700, giriprasad@... wrote: But, without those changes, if I am trying to ping the board on which Zephyr is running, it is not responding to ping requests and wireshark capture in this scenario can be found in the attached file. I am unable to figure out where the mistake is happening. I have been trying in different ways but in vain. Is there any suggestions or check points to resolve this issue. Please help...
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giriprasad@...
Thanks Marc,
I have verified that and it is fine. As mentioned in the previous mails, I am suspecting on the changes that I have made in the file "zephyr/subsys/net/l2/ethernet/ethernet.c". Although, I am not supposed to make changes in that file, I made them for my testing purpose and ping is working only with those changes. Apart from the changes I have mentioned, I haven't done any other changes to the lower layers of Zephyr. I have just done few configurations in the application layer. I am not sure, why enc28j60 is not working directly with Zephyr. Please help me in this regards. Please let me know if more information is needed. Regards, Giri
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