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I did:
I have installed kamailio 5.2.4 in ubuntu system and configured kamailio script to connect with erlang node also it sends rpc request to erlang node and get response which I have printed in a logs.
...
$erl_list(L) = "two";
$erl_list(L) = "one";
xlog("L_ALERT","Before RPC: $erl_list(args=>format)\n");
erl_rpc("erlang", "list_to_tuple", "$erl_list(args)", "$erl_xbuff(repl)");
xlogl("L_ALERT","type(reply): $erl_xbuff(repl=>type), format(repl): $erl_xbuff(repl=>format)\n");
...
Expected to happen:
Response should be get from erlang node against RPC request and it should be store in erl_xbuff. And it should be print logs like: ALERT: <script>: 501:type(reply): tuple, format(repl): {"one", "two"}
Actually happened:
Response is getting properly. but the problem is to store data into xbuff so it print logs like: ALERT: <script>: 501:type(reply): , format(repl):
I have check with older version 4.3.0 and it works fine. getting this problem after 5.2.0 version
So, I have compare 5.2.0 and 4.3.0 version code. I found one change in pv_xbuff.c file which is creating a problem when I revert the change then it works fine.
It will be reproducible everytime. Just sends rpc request and get the value in xbuff. check xbuff value
Problem logs:
ALERT: <script>: Before RPC: [["one", "two"]]
WARNING: <core> [core/mem/q_malloc.c:480]: qm_free(): WARNING: free(0) called from erlang: pv_xbuff.c: xavp_decode(1209)
ALERT: <script>: 501:type(reply): <null>, format(repl): <null>
logs after change:
ALERT: <script>: Before RPC: [["one", "two"]]
WARNING: <core> [core/mem/q_malloc.c:480]: qm_free(): WARNING: free(0) called from erlang: pv_xbuff.c: xavp_decode(1209)
ALERT: <script>: 501:type(reply): tuple, format(repl): {"one", "two"}
revert the 6542a36 commit. It will work fine
version: kamailio 5.2.4 (x86_64/linux) 759867
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: 759867
compiled on 11:52:55 Sep 4 2019 with gcc 7.4.0
Distributor ID: Ubuntu
Description: Ubuntu 18.04 LTS
Release: 18.04
Codename: bionic
Linux hostname.domain.com 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
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