[SR-Users] TLS module not initialized in 4.3.3, worked in 4.1.5

[Sebastian Damm]

Hi Daniel,

I just moved the TLS config lines up top even before sl and tm module. Also
moved the modparam stuff up there. When starting, Kamailio says, it is
listening on a TLS socket, but netstat says, it isn't. It's basically the
same behavior as before. (This is the last log line from shutting down and
the very first lines when starting up.)

Nov 13 17:29:37 lasola /usr/sbin/kamailio[3536]: DEBUG: <core>
[mem/shm_mem.c:235]: shm_mem_destroy(): destroying the shared memory lock
Nov 13 17:29:42 lasola /usr/sbin/kamailio[3704]: DEBUG: <core>
[daemonize.c:583]: set_core_dump(): core dump limits set to
18446744073709551615
Nov 13 17:29:42 lasola /usr/sbin/kamailio[3704]: WARNING: <core>
[main.c:2475]: main(): tls support enabled, but no tls engine  available
(forgot to load the tls module?)
Nov 13 17:29:42 lasola /usr/sbin/kamailio[3704]: WARNING: <core>
[main.c:2476]: main(): disabling tls...
Nov 13 17:29:42 lasola /usr/sbin/kamailio[3704]: DEBUG: <core>
[async_task.c:88]: async_task_init(): start initializing asynk task
framework
Nov 13 17:29:42 lasola /usr/sbin/kamailio[3704]: DEBUG: <core>
[sr_module.c:959]: init_mod(): tls
Nov 13 17:29:42 lasola /usr/sbin/kamailio[3704]: WARNING: tls
[tls_mod.c:287]: mod_init(): tls support is disabled (set enable_tls=1 in
the config to enable it)

I tried finding out, when those messages are written to the log. The first
one with "no engine available" comes from main.c, if it wants to initialize
tls but the module is not loaded yet. But it comes only, if tls_disable is
not set. So at this point, Kamailio knows that we want to use TLS. But when
this message appears, Kamailio sets tls_disable to 1. The second message
"tls support is disabled" comes from the tls module, and only when
tls_disable is set. So that's quite logical, because it was set this way
before.

I compared the startup behavior between 4.1.3 and 4.3.3, and in 4.1.3 we
had it pretty late in the init section, so there were a lot of modules
loaded before tls and it worked without a problem.

I'm too bad in reading code, so I don't know what I have to do to get this
message go away. The part of the code, where this is printed, changed a
bit, but the conditions for printing the message stayed the same. I'm out
of ideas what to check anymore.

Best Regards,
Sebastian

On Fri, Nov 13, 2015 at 2:29 PM, Daniel-Constantin Mierla <miconda at gmail.com
> wrote:

> Hello,
>
> it could be related to the fact that a lot of internal things are
> initialized when the first modparam is found in config, but I thought that
> change was done in 3.x.
>
> Can you put the tls module config part being the first? The other modules
> don't need to be initialized before, actually tls needs to be initialized
> and it does some of its init stuff when it is loaded (unlike the common to
> do init stuff in mod init).
>
> Cheers,
> Daniel
>
>
> On 13/11/15 14:16, Sebastian Damm wrote:
>
> Hi Daniel,
>
> yes, we see this message.
>
> Nov 13 11:44:42 lasola /usr/sbin/kamailio[16113]: DEBUG: <core>
> [sr_module.c:959]: init_mod(): tls
> Nov 13 11:44:42 lasola /usr/sbin/kamailio[16113]: WARNING: tls
> [tls_mod.c:287]: mod_init(): tls support is disabled (set enable_tls=1 in
> the config to enable it)
> Nov 13 11:44:42 lasola /usr/sbin/kamailio[16113]: DEBUG: <core>
> [main.c:2520]: main(): Expect (at least) 30 kamailio processes in your
> process list
>
> Okay, then the message right at the beginning probably just irritated us.
> But as you can see, we have set enable_tls=1 (previously and in the
> documentation it was set to 'yes'), but it still doesn't get enabled.
>
> Any more ideas?
>
> Best Regards,
> Sebastian
>
> On Fri, Nov 13, 2015 at 12:32 PM, Daniel-Constantin Mierla <
> miconda at gmail.com> wrote:
>
>> Hello,
>>
>> if you start with debug=3, do you see the message:
>>
>> DEBUG: <core> [sr_module.c:959]: init_mod(): tls
>>
>> Cheers,
>> Daniel
>>
>>
>> On 13/11/15 12:17, Sebastian Damm wrote:
>>
>> Hello,
>>
>> we just updated one kamailio server from 4.1.5 to 4.3.3, and although the
>> config file is correct and kamailio starts up, it doesn't initialize TLS
>> and says " tls support enabled, but no tls engine  available (forgot to
>> load the tls module?)"
>>
>> In the log I see:
>>
>> Old shutdown (last lines):
>> Nov 13 11:44:38 lasola /usr/sbin/kamailio[15890]: DEBUG: <core>
>> [mem/shm_mem.c:235]: shm_mem_destroy(): destroying the shared memory lock
>> Nov 13 11:44:41 lasola /usr/sbin/kamailio[14818]: ERROR: <core>
>> [tcp_read.c:271]: tcp_read_data(): error reading: Connection reset by peer
>> (104)
>> Nov 13 11:44:41 lasola /usr/sbin/kamailio[14818]: ERROR: <core>
>> [tcp_read.c:1296]: tcp_read_req(): ERROR: tcp_read_req: error reading
>>
>> New startup (first lines):
>> Nov 13 11:44:42 lasola /usr/sbin/kamailio[16113]: DEBUG: <core>
>> [daemonize.c:583]: set_core_dump(): core dump limits set to
>> 18446744073709551615
>> Nov 13 11:44:42 lasola /usr/sbin/kamailio[16113]: WARNING: <core>
>> [main.c:2475]: main(): tls support enabled, but no tls engine  available
>> (forgot to load the tls module?)
>> Nov 13 11:44:42 lasola /usr/sbin/kamailio[16113]: WARNING: <core>
>> [main.c:2476]: main(): disabling tls...
>> Nov 13 11:44:42 lasola /usr/sbin/kamailio[16113]: DEBUG: <core>
>> [async_task.c:88]: async_task_init(): start initializing asynk task
>> framework
>> Nov 13 11:44:42 lasola /usr/sbin/kamailio[16113]: DEBUG: <core>
>> [sr_module.c:959]: init_mod(): xmlrpc
>> Nov 13 11:44:42 lasola /usr/sbin/kamailio[16113]: DEBUG: <core>
>> [sr_module.c:689]: find_mod_export_record(): find_export_record: found
>> <bind_sl> in module sl [/usr/lib/x86_64-linux-gnu/kamailio/modules//sl.so]
>> Nov 13 11:44:42 lasola /usr/sbin/kamailio[16113]: DEBUG: <core>
>> [sr_module.c:959]: init_mod(): sl
>>
>> In our config file we have the following lines for TLS (pretty late,
>> after all other module loading and after most parameters):
>>
>> #!ifdef ENABLETLS
>> loadmodule "tls.so"
>>
>> modparam("tls", "private_key", "/etc/ssl/private/my.kamailio-key.pem")
>> modparam("tls", "certificate", "/etc/ssl/certs/my.kamailio.crt")
>> #!ifdef TLS_CA_CHAIN
>> # Maybe we want to use a chain to the CA
>> modparam("tls", "ca_list", "/etc/ssl/certs/my.ca-bundle.crt")
>> #!endif
>> enable_tls=1
>> listen=tls:1.2.3.4:5061
>> #!endif
>>
>> After starting up, kamailio listens on port 5060, but not on port 5061.
>> In version 4.1.1, this config worked without a problem.
>>
>> Has anybody seen this before? the tls module is there and available, it
>> doesn't say anything about "cannot load module", and it is only a warning
>> message. I'm also wondering, why this message is the first after starting
>> the server. From config I would expect that sl, tm and all the other
>> modules should be initialized before tls.
>>
>> Best Regards,
>> Sebastian
>>
>>
>>
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