[SR-Users] kemi with lua and dispatcher - attempt to index field 'dispatcher' (a nil value)

[Daniel-Constantin Mierla]

Hello,

version 5.0 doesn't have a lot of the functions from kamailio modules
exported to kemi (KSR module). Not even v5.1 will have all of them, but
I expect to be over 80% in v5.1.

There is a generic kemi function that can be used to execute any (most
of) functions from modules KSR.x.modf(...):

  -
http://kamailio.org/docs/tutorials/devel/kamailio-kemi-framework/kemimods/#ksrxmodf

If the kamctl rpc app_lua.api_list doesn't how a function you are
looking for, then it is not yet available via kemi (in KSR module).

Doing the old way with "register" modparam can be a solution only for
app_lua, if the respective module was added in the past to app_lua Lua
exports.

Cheers,
Daniel

On 22.11.17 11:24, Karsten Horsmann wrote:
> Hello Daniel,
> hello List,
>
> after reading the fresh released kemi documentation (Thanks for that!)
> on github i start to configure an kemi lua configuration. It seems to
> be that there is not an dispatcher export to kemi in my installation.
> Or i missconfigured something? How to use dispatcher with kemi?
>
> 1.) First try to solve this - use param "register" "modulename" to
> app_lua - doesnt work
> 2.) grep around in the auto kemi in/export messages in debug startup -
> nothing to see.
> 3.) grep around in the kamcmd api.list command for lua - no dispatcher
>
> here the intressting parts of the configs and lua-script:
>
> kamailio.cfg
> ...
> loadmodule "dispatcher.so"
> loadmodule "permissions.so"
> loadmodule "avpops.so"
> #!ifdef WITH_CFGLUA
> loadmodule "app_lua.so"
> modparam("app_lua", "reload", 1)
> modparam("app_lua", "register", "dispatcher")
> #!endif
>
> #!ifdef WITH_CFGLUA
> modparam("app_lua", "load", "/etc/kamailio/lua/kamailio-kemi-lua.lua")
> cfgengine "lua"
> #!else
> import_file "request-route.cfg"
> #!endif
> ...
>
>
> kamailio-kemi-lua.lua
> function ksr_request_route()
> ...
>     -- dispatch destinations
>     if KSR.permissions.allow_source_address(FLT_EDGE) then
>         KSR.info("new $fU -> $rU in permissions");
>         direction = "inbound";
>         routing_target = FLT_FSNODE;
>         ksr_route_dispatch(direction, routing_target);
>         KSR.x.exit();
>     end
>
>     KSR.info("NOT-OKAY - $rU dropped");
>     -- End of Route()
>     KSR.sl.sl_send_reply(407, "Proxy Authentication Required. See IP
> GUI");
>     return 1;
> ...
> end
>
>
> --- dispatcher route
> function ksr_route_dispatch(direction, routing_target)
>
>     KSR.xlog.xinfo("new $fU -> $rU in routing_target ksr_route_dispatch");
>     KSR.info(routing_target);
>     if (routing_target == nil) then
>         KSR.xlog.xinfo("routing_target nil");
>         KSR.sl.sl_send_reply(604, "Does Not Exist Anywhere");
>         KSR.x.exit();
>     end
>
>     if KSR.dispatcher.ds_select_dst(routing_target, 4) then
>         send_reply(404, "No destination");
>         KSR.x.exit();
>     end
>     ksr_route_myheader();
>     ksr_route_relay();
>     KSR.x.exit();
> end
>
>
> /usr/sbin/kamailio[26763]: ERROR: app_lua [app_lua_api.c:713]:
> app_lua_run_ex(): error from Lua:
> /etc/kamailio/lua/kamailio-kemi-lua.lua:131: attempt to index field
> 'dispatcher' (a nil value)
>
>
>
>
> kamailio -v
> version: kamailio 5.0.4 (x86_64/linux)
> flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS,
> DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC,
> Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX,
> FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR,
> USE_DST_BLACKLIST, HAVE_RESOLV_RES
> ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16,
> MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
> poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
> id: unknown
> compiled on 20:20:24 Nov 16 2017 with gcc 4.8.5
>
> rpm -aq | grep kam
> kamailio-mysql-5.0.4-26.el7.centos.x86_64
> kamailio-5.0.4-26.el7.centos.x86_64
> kamailio-lua-5.0.4-26.el7.centos.x86_64
> kamailio-ims-5.0.4-26.el7.centos.x86_64
>
>
> rpm -ql kamailio-5.0.4 | grep disp
> /usr/lib64/kamailio/modules/dispatcher.so
> /usr/share/doc/kamailio/modules/README.dispatcher
> /usr/share/kamailio/dbtext/kamailio/dispatcher
>
>
> -- 
> Kind Regards
> *Karsten Horsmann*
>
>
> _______________________________________________
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> sr-users at lists.kamailio.org
> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

-- 
Daniel-Constantin Mierla
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Kamailio Advanced Training - www.asipto.com
Kamailio World Conference - May 14-16, 2018 - www.kamailioworld.com

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