tr_lookup(): error parsing [{param.count,,}]

[slavrov]

Kamailio can't parse construction like $(hdr(History-Info)[*]{param.count,,}) where delimiter is comma.
I tried to use delimiter as , / ',' / "," wuthout success.

ERROR: pv [pv_trans.c:2631]: tr_parse_paramlist(): invalid separator in transformation: count,,}
ERROR: [pvapi.c:1629]: tr_lookup(): error parsing [{param.count,,}]
ERROR: [pvapi.c:1010]: pv_parse_spec2(): bad tr in pvar name "hdr"
ERROR: [pvapi.c:1036]: pv_parse_spec2(): invalid parsing in [$(hdr(History-Info)[*]{param.count,,})] at (4)

ERROR: pv [pv_trans.c:2639]: tr_parse_paramlist(): invalid name transformation: count,','}!
ERROR: [pvapi.c:1629]: tr_lookup(): error parsing [{param.count,','}]
ERROR: [pvapi.c:1010]: pv_parse_spec2(): bad tr in pvar name "hdr"
ERROR: [pvapi.c:1036]: pv_parse_spec2(): invalid parsing in [$(hdr(History-Info)[*]{param.count,','})] at (4)

ERROR: bad config file (1 errors)
ERROR: pv [pv_trans.c:2639]: tr_parse_paramlist(): invalid name transformation: count,","}!
ERROR: [pvapi.c:1629]: tr_lookup(): error parsing [{param.count,","}]
ERROR: [pvapi.c:1010]: pv_parse_spec2(): bad tr in pvar name "hdr"
ERROR: [pvapi.c:1036]: pv_parse_spec2(): invalid parsing in [$(hdr(History-Info)[*]{param.count,","})] at (4)

kamailio -v
version: kamailio 4.4.5 (x86_64/linux) f98162
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: f98162
compiled on 03:47:31 Feb 27 2017 with gcc 4.8.5

[miconda]

Can you try storing the delimiter in a variable (eg. $var(...)) and provide the variable to the transformation? It could be a quick around for now.

[slavrov]

Unfortunately, this doesn't work:

$var(delimiter) = ",";                                              
$var(count) = $(hdr(History-Info)[*]{param.count, $var(delimiter)});

ERROR: pv [pv_trans.c:2631]: tr_parse_paramlist(): invalid separator in transformation: count, $var(delimiter)}
ERROR: <core> [pvapi.c:1629]: tr_lookup(): error parsing [{param.count, $var(delimiter)}]

[miconda]

Is there a whitespace before the variable?

[slavrov]

Yes, there was whitespace. I tried without whitespace without success.

$var(delimiter) = ",";                                             
$var(count) = $(hdr(History-Info)[*]{param.count,$var(delimiter)});

ERROR: pv [pv_trans.c:2631]: tr_parse_paramlist(): invalid separator in transformation: count,$var(delimiter)}
ERROR: <core> [pvapi.c:1629]: tr_lookup(): error parsing [{param.count,$var(delimiter)}]
ERROR: <core> [pvapi.c:1010]: pv_parse_spec2(): bad tr in pvar name "hdr"
ERROR: <core> [pvapi.c:1036]: pv_parse_spec2(): invalid parsing in [$(hdr(History-Info)[*]{param.count,$var(delimiter)})] at (4)

[miconda]

OK, it seems this needs more investigation.

Meanwhile, maybe you can use other function or transformation to replace the , with another character and the count.

On the other hand, if you just want to count those headers, probably you can do a while loop to check how many headers are.

[miconda]

Can you try with latest 4.4 branch? I pushed some commits to fix the use of variable for separator.

[miconda]

Reopen if the option with variable doesn't work.

[slavrov]

Unfortunalty param.count still can't accept comma (,) as separator.
Code block:

if ($(dlg_var(cgrSuppliers){param.count,,}) > 0)
{
}

Errors:

ERROR: pv [pv_trans.c:2854]: tr_parse_paramlist(): invalid separator in transformation: count,,}
ERROR: <core> [core/pvapi.c:1715]: tr_lookup(): error parsing [{param.count,,}]
ERROR: <core> [core/pvapi.c:1085]: pv_parse_spec2(): bad tr in pvar name "dlg_var"
ERROR: <core> [core/pvapi.c:1111]: pv_parse_spec2(): invalid parsing in [$(dlg_var(cgrSuppliers){param.count,,})] at (4)
CRITICAL: <core> [core/cfg.y:3508]: yyerror_at(): parse error in config file /etc/kamailio/kamailio.cfg, line 950, column 8-46: Can't get from cache: $(dlg_var(cgrSuppliers){param.count,,})

kamailio -V

version: kamailio 5.2.0 (x86_64/linux) 535e13
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, 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_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: 535e13
compiled on 19:17:13 Dec  3 2018 with gcc 4.8.5

cat /etc/redhat-release
CentOS Linux release 7.5.1804 (Core)

[miconda]

Have you tried with variable?

$var(delimiter) = ",";
if ($(dlg_var(cgrSuppliers){param.count,$var(delimiter)}) > 0)