[SR-Users] Dialplan: using $avp("key") on subst rule with regexp capturing group

[João Vitor Arruda]

Hello again,

Just to reply to my own email.
I was able to make it work including the regex capturing group as part
of the AVP.

So the following config works:

modparam("dialplan", "match_dynamic", 1)
$avp(s:PSTNAC)  =       "^0(.*)";

Dialplan entry:
dpid = 1
match_op = 1
match_exp = $(avp(s:PSTNAC)[*])
match_len = 0
subst_exp = $(avp(s:PSTNAC)[*])
repl_exp = 9\1


Now as the next step I'm trying to use it with the AVP having multiple values.
>From what I understood reading
https://github.com/kamailio/kamailio/issues/5#issue-51480460 the
dialplan entry having an avp with index all([*]) will be checked with
the avp values one by one.

This is the config being used:

modparam("dialplan", "match_dynamic", 1)
$avp(s:PSTNAC)  =       "^0(.*)";
$avp(s:PSTNAC)  =       "^3(.*)";

Dialplan entry:
dpid = 1
match_op = 1
match_exp = $(avp(s:PSTNAC)[*])
match_len = 0
subst_exp = $(avp(s:PSTNAC)[*])
repl_exp = 9\1

This is now causing any error message but the dialplan line is not
matching either.

This is what I see in the logs:
DEBUG: dialplan [dp_repl.c:232]: dpl_dynamic_pcre_list(): parsed pcre
expression: $(avp(s:PSTNAC)[*])
DEBUG: dialplan [dp_repl.c:201]: dpl_dyn_pcre_comp(): compiled dynamic
pcre expression: $(avp(s:PSTNAC)[*]) (^3(.*), ^0(.*)) 2
DEBUG: <core> [core/mem/q_malloc.c:366]: qm_malloc():
qm_malloc(0x75692244c020, 40) called from dialplan: dp_repl.c:
dpl_dynamic_pcre_list(271)
DEBUG: dialplan [dp_repl.c:620]: dp_translate_helper(): match check:
[$(avp(s:PSTNAC)[*])] -1

Ah I forgot to mention early this is with kamailio 5.2.5

Any ideas?

Thanks.

Em ter., 21 de jul. de 2020 às 19:31, João Vitor Arruda
<joao.arruda at gmail.com> escreveu:
>
> Hello,
>
> I'm trying to use the dialplan  with $avp("key") on match_exp and
> subst_exp but i'm getting an error message when there is a regex
> capturing group on subst_exp to be used on repl_exp
>
> This is the config used:
>
> modparam("dialplan", "match_dynamic", 1)
> $avp(s:PSTNAC)  =       "0";
>
> Dialplan entry:
> dpid = 1
> match_op = 1
> match_exp = ^$avp(s:PSTNAC)
> match_len = 0
> subst_exp = ^$avp(s:PSTNAC)(.*)
> repl_exp = 9\1
>
> After executing dp_translate while the dialplan is properly matched
> the following error message occurs and the repl_exp didn't work as
> expected:
> ERROR: dialplan [dp_repl.c:422]: rule_translate(): illegal access to
> 1-th subexpr of subst expr (max 0)
>
> I've tried some other dialplan entries like:
>
> dpid = 1
> match_op = 1
> match_exp = ^$(avp(s:PSTNAC)[*])
> match_len = 0
> subst_exp = ^$(avp(s:PSTNAC)[*])(.*)
> repl_exp = 9\1
>
> But that resulted in the same error message and no replacement either.
>
> Any suggestion on what I'm doing wrong here?
>
> Thanks,
>
> Joao Arruda