Dear Ole,
when you say
"You need to also start VPP with:
punt { socket <path to socket>}"
do you mean to insert the above line in the /etc/vpp/startup.conf ?
What about the socket. Should I bind it to the NIC I am using for vpp or it
is a generic socket?
Thanks for the help. In case I will let it work I guess I will publish a
guide on it explaining all the trouble I passed through.
Best regards,
Alessio
On Tue, Jun 6, 2017 at 10:19 AM, <otr...@employees.org> wrote:
> Hi Alessio,
>
> If you want to extend what I did (with the punt socket.
>
> You need to also start VPP with:
> punt { socket <path to socket>}
>
> Then you should see the print messages you added in on the VPP console /
> cli.
>
> Best regards,
> Ole
>
> > On 5 Jun 2017, at 19:49, Alessio Silvestro <ale.silver...@gmail.com>
> wrote:
> >
> > Dear Ole,
> >
> > In order to avoid problems with vagrant, I installed VPP on ubuntu
> server 16.04.
> >
> > I start vpp with the command! $ sudo vpp unix interactive.
> >
> > After configuring correctly the interface I do $ set punt udp 1111 in
> order to accept UDP traffic on the port 1111.
> >
> > When I send 1 UDP packet I see the following trace:
> >
> > "
> >
> > vpp# show trace
> >
> > ------------------- Start of thread 0 vpp_main -------------------
> >
> > Packet 1
> >
> > 00:00:49:978247: dpdk-input
> >
> > GigabitEthernet0/9/0 rx queue 0
> >
> > buffer 0x4db5: current data 14, length 46, free-list 0, clone-count 0,
> totlen-nifb 0, trace 0x0
> >
> > PKT MBUF: port 0, nb_segs 1, pkt_len 60
> >
> > buf_len 2176, data_len 60, ol_flags 0x0, data_off 128, phys_addr
> 0x8ec36d80
> >
> > packet_type 0x0
> >
> > IP4: 08:00:27:42:3e:65 -> 08:00:27:93:9a:be
> >
> > UDP: 172.28.128.6 -> 172.28.128.5
> >
> > tos 0x00, ttl 64, length 35, checksum 0x49dc
> >
> > fragment id 0x98a9, flags DONT_FRAGMENT
> >
> > UDP: 47743 -> 1111
> >
> > length 15, checksum 0x8a50
> >
> > 00:00:49:978287: ip4-input
> >
> > UDP: 172.28.128.6 -> 172.28.128.5
> >
> > tos 0x00, ttl 64, length 35, checksum 0x49dc
> >
> > fragment id 0x98a9, flags DONT_FRAGMENT
> >
> > UDP: 47743 -> 1111
> >
> > length 15, checksum 0x8a50
> >
> > 00:00:49:978292: ip4-lookup
> >
> > fib 0 dpo-idx 6 flow hash: 0x00000000
> >
> > UDP: 172.28.128.6 -> 172.28.128.5
> >
> > tos 0x00, ttl 64, length 35, checksum 0x49dc
> >
> > fragment id 0x98a9, flags DONT_FRAGMENT
> >
> > UDP: 47743 -> 1111
> >
> > length 15, checksum 0x8a50
> >
> > 00:00:49:978297: ip4-local
> >
> > UDP: 172.28.128.6 -> 172.28.128.5
> >
> > tos 0x00, ttl 64, length 35, checksum 0x49dc
> >
> > fragment id 0x98a9, flags DONT_FRAGMENT
> >
> > UDP: 47743 -> 1111
> >
> > length 15, checksum 0x8a50
> >
> > 00:00:49:978299: ip4-udp-lookup
> >
> > UDP: src-port 47743 dst-port 1111
> >
> > 00:00:49:978302: error-punt
> >
> > ip4-udp-punt: udp port punt
> >
> > "
> >
> > which to me looks like the UDP traffic has been correctly received.
> >
> > My goal is to modify your code, which is at $TOPDIR/vpp/src/vnet/ip/punt.c,
> in order to start and understand how to deploy new code with VPP.
> >
> > I inserted several clib_warning("I am here") in the code. Then I run
> $TOPDIR/vpp make build-release to compile the new code. However, even if I
> am pretty sure the your code runs because of the trace above, I cannot see
> any output in /var/log/syslog as suggested by Chris nor in the console (I
> run with unix interactive).
> >
> > Do you have any idea why I cannot see any message in the log and/or how
> I can modify/debug your code with some prints and look at them somewhere?
> >
> > Thanks for the help.
> >
> > Best regards,
> > Alessio
> >
> >
> >
> > On Fri, Jun 2, 2017 at 4:48 PM, <otr...@employees.org> wrote:
> > Alessio,
> >
> > Run in the foreground with unix { interactive }.
> > And directly from a the build directory.
> > The vagrant stuff is mostly useful for demo and first look. Sounds like
> you really want to do some development.
> >
> > Cheers,
> > Ole
> >
> > > On 2 Jun 2017, at 13:31, Alessio Silvestro <ale.silver...@gmail.com>
> wrote:
> > >
> > > I am running the vagrant machine provided, so I run on Ubuntu 16.04.02
> TLS.
> > >
> > > I tried clib_warning(), clib_unix_warning(), clib_error() and
> clib_unix_error().
> > >
> > > I inserted that line in both vvp/src/vnet/ip/punt.c and
> vpp/src/vnet/ip/ip4_forward.c in order to be sure that the packet was
> actually reaching the node.
> > >
> > > However, there is no sign in /var/log/syslog or anywhere else I can
> think of about that message
> > >
> > > Are you sure there is no other place where they can be printed?
> > >
> > > Thanks for the cooperation,
> > > Alessio
> > >
> > > On Thu, Jun 1, 2017 at 7:26 PM, John Lo (loj) <l...@cisco.com> wrote:
> > > The output of clib_warning() call should be in the syslog. If running
> vpp in Ubuntu, take a look in /var/log/syslog. -John
> > >
> > >
> > >
> > > From: vpp-dev-boun...@lists.fd.io [mailto:vpp-dev-boun...@lists.fd.io]
> On Behalf Of Alessio Silvestro
> > > Sent: Thursday, June 01, 2017 12:11 PM
> > > To: Luke, Chris <chris_l...@comcast.com>
> > > Cc: vpp-dev@lists.fd.io
> > > Subject: Re: [vpp-dev] VPP Node Debug
> > >
> > >
> > >
> > > I knew VPP run in user space and that printk is not the best option,
> however from the documentation it is not clear to me how to do that.
> > >
> > >
> > >
> > > For example now I inserted the command clib_warning("I am here!") in
> the node I create -- that from vppctl show trace I can see processes the
> packets.
> > >
> > >
> > >
> > > Where does it prints?
> > >
> > >
> > >
> > > Still I cannot figure it out.
> > >
> > >
> > >
> > > Thanks,
> > >
> > > Alessio
> > >
> > >
> > >
> > > On Thu, Jun 1, 2017 at 6:00 PM, Luke, Chris <chris_l...@comcast.com>
> wrote:
> > >
> > > printk() is typically a kernel thing, no? This isn’t kernel code. 😊
> > >
> > >
> > >
> > > If you just want stuff on the console when running in a debugger, or
> interactively, clib_warning() may be what you are looking for.
> > >
> > >
> > >
> > > Chris.
> > >
> > >
> > >
> > >
> > >
> > > From: vpp-dev-boun...@lists.fd.io [mailto:vpp-dev-boun...@lists.fd.io]
> On Behalf Of Alessio Silvestro
> > > Sent: Thursday, June 1, 2017 10:35
> > > To: vpp-dev@lists.fd.io
> > > Subject: [vpp-dev] VPP Node Debug
> > >
> > >
> > >
> > > Hi all,
> > >
> > >
> > >
> > > I am using this code "https://gerrit.fd.io/r/#/c/6721/"; to in order
> to enable an external process to receive UDP packets.
> > >
> > >
> > >
> > > I tried to use printk -- including module.h in the c file.
> > >
> > >
> > >
> > > When I compile VPP with:
> > >
> > >
> > >
> > > TOPDIR/vpp make build-release
> > >
> > >
> > >
> > > I got the following error
> > >
> > >
> > >
> > > fatal error: linux/module.h: No such file or directory
> > >
> > > compilation terminated.
> > >
> > >
> > >
> > > Do you have any idea why?
> > >
> > >
> > >
> > > Is there a better way to debug the code of a node in VPP?
> > >
> > >
> > >
> > > Thanks,
> > >
> > > Alessio
> > >
> > >
> > >
> > >
> > > _______________________________________________
> > > vpp-dev mailing list
> > > vpp-dev@lists.fd.io
> > > https://lists.fd.io/mailman/listinfo/vpp-dev
> >
> >
>
>
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