JSON-RPC dgram_socket just part of the output

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Kamailio 5.3 call forwarding

Ilie Soltanici

25 Aug 2022 25 Aug '22

12:13 a.m.

Hello,

I'm trying to get the dispatcher status from kamailio through the UDP datagram but for some reason, it is getting just part of the output. Is there any buffer that I have to increase to get the complete output?

command used: ``` echo '{"jsonrpc": "2.0", "method": "dispatcher.list", "reply_name": "kamailio_reply_fifo", "id": 1}' | nc -u 192.168.1.1 8090 ```

kamailio related config: modparam("jsonrpcs", "fifo_name", "/tmp/kamailio_request.fifo") modparam("jsonrpcs", "transport", 6) modparam("jsonrpcs", "fifo_mode", 0600) modparam("jsonrpcs", "fifo_user", "kamailio") modparam("jsonrpcs", "dgram_socket", "udp:MY_INTERNAL_IP_ADDR:8090") modparam("jsonrpcs", "dgram_timeout", 2000) modparam("jsonrpcs", "pretty_format", 1)

output: [image: image.png]

Thanks

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Henning Westerholt

25 Aug 25 Aug

6:42 a.m.

Hello,

any errors in the log when you execute the command? Maybe its related to fragmentation of the UDP packet?

Cheers,

Henning

-- Henning Westerholt – https://skalatan.de/blog/ Kamailio services – https://gilawa.com https://gilawa.com/

From: sr-users sr-users-bounces@lists.kamailio.org On Behalf Of Ilie Soltanici Sent: Thursday, August 25, 2022 2:13 AM To: Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org Subject: [SR-Users] JSON-RPC dgram_socket just part of the output

Hello,

command used: ``` echo '{"jsonrpc": "2.0", "method": "dispatcher.list", "reply_name": "kamailio_reply_fifo", "id": 1}' | nc -u 192.168.1.1 8090 ```

output: [cid:image001.png@01D8B85E.AB953A70]

Thanks

Ilie Soltanici

11:12 a.m.

@Henning Westerholt hw@skalatan.de ,

Not sure that it's related to the UDP fragmentation because in Wireshark I can see some packets coming from the server, yes they are fragmented but I can't understand why just part of them arrive at the client.

[image: image.png]

In the Kamailio logs there are no warnings or errors, just some debug messages:

``` Aug 25 09:48:49 svr[25699]: DEBUG: ctl [io_listener.c:518]: handle_stream_read(): bytes processed: 40 Aug 25 09:48:49 svr[25699]: DEBUG: ctl [io_listener.c:495]: handle_stream_read(): handle_stream read: eof on /var/run/kamailio/kamailio_ctl Aug 25 09:48:49 svr[25699]: DEBUG: ctl [../../core/io_wait.h:600]: io_watch_del(): DBG: io_watch_del (0x7f0a6b972340, 22, -1, 0x10) fd_no=4 called Aug 25 09:48:50 svr[25699]: DEBUG: ctl [../../core/io_wait.h:375]: io_watch_add(): processing io_watch_add(0x7f0a6b972340, 22, 3, 0x1f0f350) - fd_no=3 Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:442]: handle_new_connect(): handle_stream read: new connection (1) on /var/run/kamailio/kamailio_ctl Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:498]: handle_stream_read(): bytes read: 18 Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:518]: handle_stream_read(): bytes processed: 18 Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:498]: handle_stream_read(): bytes read: 18 Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:518]: handle_stream_read(): bytes processed: 18 Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:498]: handle_stream_read(): bytes read: 21 Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:518]: handle_stream_read(): bytes processed: 21 Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:498]: handle_stream_read(): bytes read: 21 Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:518]: handle_stream_read(): bytes processed: 21 Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:498]: handle_stream_read(): bytes read: 25 Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:518]: handle_stream_read(): bytes processed: 25 Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:495]: handle_stream_read(): handle_stream read: eof on /var/run/kamailio/kamailio_ctl Aug 25 09:48:50 svr[25699]: DEBUG: ctl [../../core/io_wait.h:600]: io_watch_del(): DBG: io_watch_del (0x7f0a6b972340, 22, -1, 0x10) fd_no=4 called ```

Thanks.

On Thu, 25 Aug 2022 at 07:43, Henning Westerholt hw@gilawa.com wrote:

...

Hello,

any errors in the log when you execute the command? Maybe its related to fragmentation of the UDP packet?

Cheers,

Henning

--

Henning Westerholt – https://skalatan.de/blog/

Kamailio services – https://gilawa.com

*From:* sr-users sr-users-bounces@lists.kamailio.org *On Behalf Of *Ilie Soltanici *Sent:* Thursday, August 25, 2022 2:13 AM *To:* Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org *Subject:* [SR-Users] JSON-RPC dgram_socket just part of the output

Hello,

I'm trying to get the dispatcher status from kamailio through the UDP datagram but for some reason, it is getting just part of the output. Is there any buffer that I have to increase to get the complete output?

command used:
echo '{"jsonrpc": "2.0", "method": "dispatcher.list", "reply_name":
"kamailio_reply_fifo", "id": 1}' | nc -u 192.168.1.1 8090
kamailio related config:

modparam("jsonrpcs", "fifo_name", "/tmp/kamailio_request.fifo")

modparam("jsonrpcs", "transport", 6)

modparam("jsonrpcs", "fifo_mode", 0600)

modparam("jsonrpcs", "fifo_user", "kamailio")

modparam("jsonrpcs", "dgram_socket", "udp:MY_INTERNAL_IP_ADDR:8090")

modparam("jsonrpcs", "dgram_timeout", 2000)

modparam("jsonrpcs", "pretty_format", 1)

output:

Thanks

Henning Westerholt

1:13 p.m.

Hello,

if you see in wireshark that all data gets delivered from Kamailio, maybe it’s a problem with the “nc” client?

Cheers,

Henning

-- Henning Westerholt – https://skalatan.de/blog/ Kamailio services – https://gilawa.com https://gilawa.com/

From: Ilie Soltanici iliusha.md@gmail.com Sent: Thursday, August 25, 2022 1:12 PM To: Henning Westerholt hw@gilawa.com; Henning Westerholt hw@gilawa.com Cc: Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org Subject: Re: [SR-Users] JSON-RPC dgram_socket just part of the output

@Henning Westerholtmailto:hw@skalatan.de ,

[cid:image001.png@01D8B895.482A4FC0]

In the Kamailio logs there are no warnings or errors, just some debug messages:

Thanks.

On Thu, 25 Aug 2022 at 07:43, Henning Westerholt <hw@gilawa.commailto:hw@gilawa.com> wrote: Hello,

any errors in the log when you execute the command? Maybe its related to fragmentation of the UDP packet?

Cheers,

Henning

-- Henning Westerholt – https://skalatan.de/blog/ Kamailio services – https://gilawa.com https://gilawa.com/

From: sr-users <sr-users-bounces@lists.kamailio.orgmailto:sr-users-bounces@lists.kamailio.org> On Behalf Of Ilie Soltanici Sent: Thursday, August 25, 2022 2:13 AM To: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.orgmailto:sr-users@lists.kamailio.org> Subject: [SR-Users] JSON-RPC dgram_socket just part of the output

Hello,

command used: ``` echo '{"jsonrpc": "2.0", "method": "dispatcher.list", "reply_name": "kamailio_reply_fifo", "id": 1}' | nc -u 192.168.1.1 8090 ```

output: [cid:image002.png@01D8B895.482A4FC0]

Thanks

Ilie Soltanici

1:48 p.m.

Hello,

No, in Wireshark I also see just a part of the output, which is not the full JSON object, so the problem is somewhere in Kamailio. You can try to replicate this by yourself when will have a chance. The version I'm using is: version: kamailio 5.6.0 (x86_64/linux) b552a2

Thanks.

On Thu, 25 Aug 2022 at 14:13, Henning Westerholt hw@gilawa.com wrote:

...

Hello,

if you see in wireshark that all data gets delivered from Kamailio, maybe it’s a problem with the “nc” client?

Cheers,

Henning

--

Henning Westerholt – https://skalatan.de/blog/

Kamailio services – https://gilawa.com

*From:* Ilie Soltanici iliusha.md@gmail.com *Sent:* Thursday, August 25, 2022 1:12 PM *To:* Henning Westerholt hw@gilawa.com; Henning Westerholt < hw@gilawa.com> *Cc:* Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org *Subject:* Re: [SR-Users] JSON-RPC dgram_socket just part of the output

@Henning Westerholt hw@skalatan.de ,

Not sure that it's related to the UDP fragmentation because in Wireshark I can see some packets coming from the server, yes they are fragmented but I can't understand why just part of them arrive at the client.

In the Kamailio logs there are no warnings or errors, just some debug messages:
Aug 25 09:48:49 svr[25699]: DEBUG: ctl [io_listener.c:518]:
handle_stream_read(): bytes processed: 40
Aug 25 09:48:49 svr[25699]: DEBUG: ctl [io_listener.c:495]:
handle_stream_read(): handle_stream read: eof on
/var/run/kamailio/kamailio_ctl
Aug 25 09:48:49 svr[25699]: DEBUG: ctl [../../core/io_wait.h:600]:
io_watch_del(): DBG: io_watch_del (0x7f0a6b972340, 22, -1, 0x10) fd_no=4
called
Aug 25 09:48:50 svr[25699]: DEBUG: ctl [../../core/io_wait.h:375]:
io_watch_add(): processing io_watch_add(0x7f0a6b972340, 22, 3, 0x1f0f350) -
fd_no=3
Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:442]:
handle_new_connect(): handle_stream read: new connection (1) on
/var/run/kamailio/kamailio_ctl
Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:498]:
handle_stream_read(): bytes read: 18
Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:518]:
handle_stream_read(): bytes processed: 18
Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:498]:
handle_stream_read(): bytes read: 18
Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:518]:
handle_stream_read(): bytes processed: 18
Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:498]:
handle_stream_read(): bytes read: 21
Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:518]:
handle_stream_read(): bytes processed: 21
Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:498]:
handle_stream_read(): bytes read: 21
Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:518]:
handle_stream_read(): bytes processed: 21
Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:498]:
handle_stream_read(): bytes read: 25
Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:518]:
handle_stream_read(): bytes processed: 25
Aug 25 09:48:50 svr[25699]: DEBUG: ctl [io_listener.c:495]:
handle_stream_read(): handle_stream read: eof on
/var/run/kamailio/kamailio_ctl
Aug 25 09:48:50 svr[25699]: DEBUG: ctl [../../core/io_wait.h:600]:
io_watch_del(): DBG: io_watch_del (0x7f0a6b972340, 22, -1, 0x10) fd_no=4
called
Thanks.

On Thu, 25 Aug 2022 at 07:43, Henning Westerholt hw@gilawa.com wrote:

Hello,

any errors in the log when you execute the command? Maybe its related to fragmentation of the UDP packet?

Cheers,

Henning

--

Henning Westerholt – https://skalatan.de/blog/

Kamailio services – https://gilawa.com

*From:* sr-users sr-users-bounces@lists.kamailio.org *On Behalf Of *Ilie Soltanici *Sent:* Thursday, August 25, 2022 2:13 AM *To:* Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org *Subject:* [SR-Users] JSON-RPC dgram_socket just part of the output

Hello,

I'm trying to get the dispatcher status from kamailio through the UDP datagram but for some reason, it is getting just part of the output. Is there any buffer that I have to increase to get the complete output?

command used:
echo '{"jsonrpc": "2.0", "method": "dispatcher.list", "reply_name":
"kamailio_reply_fifo", "id": 1}' | nc -u 192.168.1.1 8090
kamailio related config:

modparam("jsonrpcs", "fifo_name", "/tmp/kamailio_request.fifo")

modparam("jsonrpcs", "transport", 6)

modparam("jsonrpcs", "fifo_mode", 0600)

modparam("jsonrpcs", "fifo_user", "kamailio")

modparam("jsonrpcs", "dgram_socket", "udp:MY_INTERNAL_IP_ADDR:8090")

modparam("jsonrpcs", "dgram_timeout", 2000)

modparam("jsonrpcs", "pretty_format", 1)

output:

Thanks

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Henning Westerholt
Ilie Soltanici