### Description siptrace module not mirror relayed ACK message.

### Troubleshooting

#### Reproduction Need patch vanilla kamailio config like this diff ```patch --- kamailio.cfg +++ /etc/kamailio/kamailio.cfg @@ -1,4 +1,8 @@ #!KAMAILIO +#!define WITH_DEBUG +#!define WITH_PSTN +#!define WITH_NAT + # # Kamailio (OpenSER) SIP Server v5.1 - default configuration script # - web: https://www.kamailio.org @@ -137,7 +141,9 @@ #!define FLT_ACCMISSED 2 #!define FLT_ACCFAILED 3 #!define FLT_NATS 5 +#!define FLT_SIPTRACE 8

+ #!define FLB_NATB 6 #!define FLB_NATSIPPING 7

@@ -198,8 +204,8 @@ * pstn.gw_ip = "10.0.0.101" desc "My PSTN GW Address" * * - by default is empty to avoid misrouting */ -pstn.gw_ip = "" desc "PSTN GW Address" -pstn.gw_port = "" desc "PSTN GW Port" +pstn.gw_ip = "8.8.8.8" desc "PSTN GW Address" +pstn.gw_port = "5060" desc "PSTN GW Port" #!endif

#!ifdef WITH_VOICEMAIL @@ -286,6 +292,16 @@ loadmodule "debugger.so" #!endif

+loadmodule "siptrace.so" +modparam("siptrace", "duplicate_uri", "sip:217.12.247.98:9060") +modparam("siptrace", "hep_mode_on", 1) +modparam("siptrace", "hep_version", 3) +modparam("siptrace", "hep_capture_id", 1) +modparam("siptrace", "trace_to_database", 0) +## `trace_flag` value must be equal to FLT_SIPTRACE value at head of "default.cfg" file +modparam("siptrace", "trace_flag", 8) +modparam("siptrace", "trace_on", 1) + # ----------------- setting module-specific parameters ---------------

@@ -310,9 +326,10 @@

# ----- rr params ----- # set next param to 1 to add value to ;lr param (helps with some UAs) -modparam("rr", "enable_full_lr", 0) +modparam("rr", "enable_full_lr", 1) # do not append from tag to the RR (no need for this script) modparam("rr", "append_fromtag", 0) +modparam("rr", "enable_double_rr", 1)

# ----- registrar params ----- modparam("registrar", "method_filtering", 1) @@ -536,6 +553,9 @@ if(!t_is_set("failure_route")) t_on_failure("MANAGE_FAILURE"); }

+ sip_trace(); + setflag(FLT_SIPTRACE); + if (!t_relay()) { sl_reply_error(); } ``` #### Debugging Data

none

#### Log Messages ```text {1 20 ACK 1258335781} 15(2198) DEBUG: siptrace [siptrace.c:507]: sip_trace_store_db(): database connection not initialized {1 20 ACK 1258335781} 15(2198) DEBUG: siptrace [siptrace_hep.c:498]: pipport2su(): the port string is 35060 {1 20 ACK 1258335781} 15(2198) DEBUG: siptrace [siptrace_hep.c:498]: pipport2su(): the port string is 5060 {1 20 ACK 1258335781} 15(2198) DEBUG: <core> [core/proxy.c:264]: mk_proxy(): doing DNS lookup... {1 20 ACK 1258335781} 15(2198) DEBUG: siptrace [siptrace_hep.c:183]: trace_send_hep3_duplicate(): setting up the socket_info {1 20 ACK 1258335781} 15(2198) exec: *** cfgtrace:request_route=[RELAY] c=[/etc/kamailio/kamailio.cfg] l=557 a=39 n=setflag {1 20 ACK 1258335781} 15(2198) exec: *** cfgtrace:request_route=[RELAY] c=[/etc/kamailio/kamailio.cfg] l=562 a=16 n=if {1 20 ACK 1258335781} 15(2198) exec: *** cfgtrace:request_route=[RELAY] c=[/etc/kamailio/kamailio.cfg] l=559 a=24 n=t_relay {1 20 ACK 1258335781} 15(2198) DEBUG: tm [t_lookup.c:1319]: t_newtran(): msg id=1 , global msg id=0 , T on entrance=0xffffffffffffffff {1 20 ACK 1258335781} 15(2198) DEBUG: tm [t_lookup.c:476]: t_lookup_request(): start searching: hash=11341, isACK=1 {1 20 ACK 1258335781} 15(2198) DEBUG: tm [t_lookup.c:435]: matching_3261(): RFC3261 transaction matching failed {1 20 ACK 1258335781} 15(2198) DEBUG: tm [t_lookup.c:659]: t_lookup_request(): no transaction found {1 20 ACK 1258335781} 15(2198) DEBUG: tm [t_funcs.c:284]: t_relay_to(): forwarding ACK statelessly {1 20 ACK 1258335781} 15(2198) DEBUG: <core> [core/md5utils.c:67]: MD5StringArray(): MD5 calculated: 307e4757bd94a80e26f17adb5260cb13 {1 20 ACK 1258335781} 15(2198) DEBUG: <core> [core/forward.c:557]: forward_request(): Sending: ``` Received ACK is mirrored but relayed ACK is not mirrored. Full log in attached file `kamailio.log` [kamailio.log](https://github.com/kamailio/kamailio/files/2766269/kamailio.log)

#### SIP Traffic

SIP messages and mirrored traffic in attached pcap file. Packet 19 is not mirrored. [kamailio-ack.zip](https://github.com/kamailio/kamailio/files/2766281/kamailio-ack.zip)

### Possible Solutions

Not know

### Additional Information

* **Kamailio Version** - output of `kamailio -v`

``` / # kamailio -v version: kamailio 5.1.6 (x86_64/linux) 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: unknown compiled on 03:24:34 Nov 23 2018 with gcc 8.2.0 ```

* **Operating System**:

Alpine Linux edge

``` / # cat /etc/os-release NAME="Alpine Linux" ID=alpine VERSION_ID=3.8.0 PRETTY_NAME="Alpine Linux v3.8" HOME_URL="http://alpinelinux.org" BUG_REPORT_URL="http://bugs.alpinelinux.org" ```