<!-- Kamailio Project uses GitHub Issues only for bugs in the code or feature requests. Please use this template only for bug reports.

If you have questions about using Kamailio or related to its configuration file, ask on sr-users mailing list:

* https://lists.kamailio.org/mailman3/postorius/lists/sr-users.lists.kamailio....

If you have questions about developing extensions to Kamailio or its existing C code, ask on sr-dev mailing list:

* https://lists.kamailio.org/mailman3/postorius/lists/sr-dev.lists.kamailio.or...

Please try to fill this template as much as possible for any issue. It helps the developers to troubleshoot the issue.

If there is no content to be filled in a section, the entire section can be removed.

You can delete the comments from the template sections when filling.

You can delete next line and everything above before submitting (it is a comment). -->

### Description

<!-- Explain what you did, what you expected to happen, and what actually happened. --> my intention was to register to secondary remote proxy when primary remote proxy fails. iam using uac module for remote registration here i will ping the primary and secondary proxy using dispatcher module when the proxy is down, i will send registration to the other proxy which is up.

### Troubleshooting ``` 17(26) CRITICAL: <core> [core/mem/q_malloc.c:501]: qm_free(): BUG: bad pointer 0x7fa7ec666479 (out of memory block!) called from core: core/action.c: do_action(757) - ignoring 17(26) INFO: tm [t_lookup.c:1333]: t_newtran(): attempt to create transaction for a faked request - try to avoid it 17(26) NOTICE: tm [t_reply.c:2159]: relay_reply(): dst no longer set - skipped sending the reply out ``` #### Reproduction

<!-- If the issue can be reproduced, describe how it can be done. --> basic_block

``` ### LOG Levels: 3=DBG, 2=INFO, 1=NOTICE, 0=WARN, -1=ERR #!ifdef WITH_DEBUG debug=4 log_stderror=yes #!else debug=2 log_stderror=no #!endif

memdbg=5 memlog=5

log_facility=LOG_LOCAL0 log_prefix="{$mt $hdr(CSeq) $ci} "

/* number of SIP routing processes */ children=8

/* uncomment the next line to disable TCP (default on) */ # disable_tcp=yes

/* uncomment the next line to disable the auto discovery of local aliases * based on reverse DNS on IPs (default on) */ # auto_aliases=no

/* add local domain aliases */ # alias="sip.mydomain.com"

/* uncomment and configure the following line if you want Kamailio to * bind on a specific interface/port/proto (default bind on all available) */ # listen=udp:10.0.0.10:5060

#!ifdef WITH_TLS enable_tls=yes #!endif

/* life time of TCP connection when there is no traffic * - a bit higher than registration expires to cope with UA behind NAT */ tcp_connection_lifetime=3605

####### Custom Parameters #########

/* These parameters can be modified runtime via RPC interface * - see the documentation of 'cfg_rpc' module. * * Format: group.id = value 'desc' description * Access: $sel(cfg_get.group.id) or @cfg_get.group.id */

#!ifdef WITH_PSTN /* PSTN GW Routing * * - pstn.gw_ip: valid IP or hostname as string value, example: * 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" #!endif

#!ifdef WITH_VOICEMAIL /* VoiceMail Routing on offline, busy or no answer * * - by default Voicemail server IP is empty to avoid misrouting */ voicemail.srv_ip = "" desc "VoiceMail IP Address" voicemail.srv_port = "5060" desc "VoiceMail Port" #!endif

####### Modules Section ########

/* set paths to location of modules */ # mpath="/usr/lib/x86_64-linux-gnu/kamailio/modules/"

#!ifdef WITH_MYSQL loadmodule "db_mysql.so" #!endif

loadmodule "jsonrpcs.so" loadmodule "kex.so" loadmodule "corex.so" loadmodule "tm.so" loadmodule "tmx.so" loadmodule "sl.so" loadmodule "rr.so" loadmodule "ipops.so" loadmodule "pv.so" loadmodule "maxfwd.so" loadmodule "usrloc.so" loadmodule "registrar.so" loadmodule "textops.so" loadmodule "siputils.so" loadmodule "xlog.so" loadmodule "sanity.so" loadmodule "ctl.so" loadmodule "cfg_rpc.so" loadmodule "acc.so" loadmodule "counters.so"

#!ifdef WITH_AUTH loadmodule "auth.so" loadmodule "auth_db.so" #!ifdef WITH_IPAUTH loadmodule "permissions.so" #!endif #!endif

#!ifdef WITH_ALIASDB loadmodule "alias_db.so" #!endif

#!ifdef WITH_SPEEDDIAL loadmodule "speeddial.so" #!endif

#!ifdef WITH_MULTIDOMAIN loadmodule "domain.so" #!endif

#!ifdef WITH_PRESENCE loadmodule "presence.so" loadmodule "presence_xml.so" #!endif

#!ifdef WITH_NAT loadmodule "nathelper.so" loadmodule "rtpproxy.so" #!endif

#!ifdef WITH_TLS loadmodule "tls.so" #!endif

#!ifdef WITH_ANTIFLOOD loadmodule "htable.so" loadmodule "pike.so" #!endif

#!ifdef WITH_XMLRPC loadmodule "xmlrpc.so" #!endif

#!ifdef WITH_DEBUG loadmodule "debugger.so" #!endif

# ----------------- setting module-specific parameters ---------------

# ----- jsonrpcs params ----- modparam("jsonrpcs", "pretty_format", 1) /* set the path to RPC fifo control file */ # modparam("jsonrpcs", "fifo_name", "/var/run/kamailio/kamailio_rpc.fifo") /* set the path to RPC unix socket control file */ # modparam("jsonrpcs", "dgram_socket", "/var/run/kamailio/kamailio_rpc.sock")

# ----- ctl params ----- /* set the path to RPC unix socket control file */ # modparam("ctl", "binrpc", "unix:/var/run/kamailio/kamailio_ctl")

# ----- tm params ----- # auto-discard branches from previous serial forking leg #modparam("tm", "failure_reply_mode", 3) # default retransmission timeout: 30sec modparam("tm", "fr_timer", 2000) # default invite retransmission timeout after 1xx: 120sec modparam("tm", "fr_inv_timer", 40000)

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

#modparam("rr", "enable_double_rr", 2)

# ----- registrar params ----- modparam("registrar", "method_filtering", 1) /* uncomment the next line to disable parallel forking via location */ # modparam("registrar", "append_branches", 0) /* uncomment the next line not to allow more than 10 contacts per AOR */ # modparam("registrar", "max_contacts", 10) /* max value for expires of registrations */ modparam("registrar", "max_expires", 3600) /* set it to 1 to enable GRUU */ modparam("registrar", "gruu_enabled", 0)

# ----- acc params ----- /* what special events should be accounted ? */ modparam("acc", "early_media", 0) modparam("acc", "report_ack", 0) modparam("acc", "report_cancels", 0) /* by default ww do not adjust the direct of the sequential requests. * if you enable this parameter, be sure the enable "append_fromtag" * in "rr" module */ modparam("acc", "detect_direction", 0) /* account triggers (flags) */ modparam("acc", "log_flag", FLT_ACC) modparam("acc", "log_missed_flag", FLT_ACCMISSED) modparam("acc", "log_extra", "src_user=$fU;src_domain=$fd;src_ip=$si;" "dst_ouser=$tU;dst_user=$rU;dst_domain=$rd") modparam("acc", "failed_transaction_flag", FLT_ACCFAILED) /* enhanced DB accounting */ #!ifdef WITH_ACCDB modparam("acc", "db_flag", FLT_ACC) modparam("acc", "db_missed_flag", FLT_ACCMISSED) modparam("acc", "db_url", DBURL) modparam("acc", "db_extra", "src_user=$fU;src_domain=$fd;src_ip=$si;" "dst_ouser=$tU;dst_user=$rU;dst_domain=$rd") #!endif

# ----- usrloc params ----- /* enable DB persistency for location entries */ #!ifdef WITH_USRLOCDB modparam("usrloc", "db_url", DBURL) modparam("usrloc", "db_mode", 2) modparam("usrloc", "use_domain", MULTIDOMAIN) #!endif

# ----- auth_db params ----- #!ifdef WITH_AUTH modparam("auth_db", "db_url", DBURL) modparam("auth_db", "calculate_ha1", yes) modparam("auth_db", "password_column", "password") modparam("auth_db", "load_credentials", "") modparam("auth_db", "use_domain", MULTIDOMAIN)

# ----- permissions params ----- #!ifdef WITH_IPAUTH modparam("permissions", "db_url", DBURL) modparam("permissions", "db_mode", 1) #!endif

#!endif

# ----- alias_db params ----- #!ifdef WITH_ALIASDB modparam("alias_db", "db_url", DBURL) modparam("alias_db", "use_domain", MULTIDOMAIN) #!endif

# ----- speeddial params ----- #!ifdef WITH_SPEEDDIAL modparam("speeddial", "db_url", DBURL) modparam("speeddial", "use_domain", MULTIDOMAIN) #!endif

# ----- domain params ----- #!ifdef WITH_MULTIDOMAIN modparam("domain", "db_url", DBURL) /* register callback to match myself condition with domains list */ modparam("domain", "register_myself", 1) #!endif

#!ifdef WITH_PRESENCE # ----- presence params ----- modparam("presence", "db_url", DBURL)

# ----- presence_xml params ----- modparam("presence_xml", "db_url", DBURL) modparam("presence_xml", "force_active", 1) #!endif

#!ifdef WITH_NAT # ----- rtpproxy params ----- modparam("rtpproxy", "rtpproxy_sock", "udp:127.0.0.1:7722")

# ----- nathelper params ----- modparam("nathelper", "natping_interval", 30) modparam("nathelper", "ping_nated_only", 1) modparam("nathelper", "sipping_bflag", FLB_NATSIPPING) modparam("nathelper", "sipping_from", "sip:pinger@kamailio.org")

# params needed for NAT traversal in other modules modparam("nathelper|registrar", "received_avp", "$avp(RECEIVED)") modparam("usrloc", "nat_bflag", FLB_NATB) #!endif

#!ifdef WITH_TLS # ----- tls params ----- modparam("tls", "config", "/etc/kamailio/tls.cfg") #!endif

#!ifdef WITH_ANTIFLOOD # ----- pike params ----- modparam("pike", "sampling_time_unit", 2) modparam("pike", "reqs_density_per_unit", 16) modparam("pike", "remove_latency", 4)

# ----- htable params ----- /* ip ban htable with autoexpire after 5 minutes */ modparam("htable", "htable", "ipban=>size=8;autoexpire=300;") #!endif

#!ifdef WITH_XMLRPC # ----- xmlrpc params ----- modparam("xmlrpc", "route", "XMLRPC"); modparam("xmlrpc", "url_match", "^/RPC") #!endif

#!ifdef WITH_DEBUG # ----- debugger params ----- modparam("debugger", "cfgtrace", 1) modparam("debugger", "log_level_name", "exec") #!endif

```

uac_block ``` #!KAMAILIO loadmodule "uac.so" loadmodule "db_sqlite.so"

modparam("uac", "reg_contact_addr", UAC_CONTACT_ADD)

modparam("uac", "reg_db_url", "sqlite:///etc/kamailio/dbs/uac_reg.db") modparam("uac", "reg_retry_interval", 10)

``` dispatcher_block ``` #!KAMAILIO loadmodule "dispatcher.so"

modparam("dispatcher", "force_dst", 1) modparam("dispatcher", "flags", 2) modparam("dispatcher", "xavp_dst", "dsdst") modparam("dispatcher", "xavp_dst_mode", 0)

modparam("dispatcher", "ds_probing_mode", 1) modparam("dispatcher", "ds_ping_interval", 15) #modparam("dispatcher", "ds_ping_reply_codes", "class=2;class=3;class=4")

modparam("dispatcher", "list_file", "/etc/kamailio/dispatcher.list") ``` route_block ```

event_route[dispatcher:dst-down] { xlog("L_ERR", "Destination down: $rm $ru ($du)\n");

$var(status) = uac_reg_status("+91XXX6"); xlog("L_NOTICE", "+91XXX_state : $var(status)\n\r"); if(uac_reg_request_to("+91XXX", 0)) { xlog("L_NOTICE", "Found remote user [$rU] on [$rd] via [$du]"); t_on_failure("REMOTE_AUTH"); $du="sip:10.*.32.1:5060"; t_relay(); }

} failure_route[REMOTE_AUTH] { if ($T_reply_code == 401 or $T_reply_code == 407) { xlog("L_NOTICE", "Remote asked for authentication"); uac_auth(); } }

```

#### Debugging Data

<!-- If you got a core dump, use gdb to extract troubleshooting data - full backtrace, local variables and the list of the code at the issue location.

gdb /path/to/kamailio /path/to/corefile bt full info locals list

If you are familiar with gdb, feel free to attach more of what you consider to be relevant. -->

```

```

#### Log Messages

<!-- Check the syslog file and if there are relevant log messages printed by Kamailio, add them next, or attach to issue, or provide a link to download them (e.g., to a pastebin site). -->

``` 17(26) ERROR: <script>: Destination down: OPTIONS sip:10.*.32.1:5060 (<null>) 17(26) NOTICE: <script>: 91XXX_state : 1 17(26) CRITICAL: <core> [core/mem/q_malloc.c:501]: qm_free(): BUG: bad pointer 0x7fa7ec666479 (out of memory block!) called from core: core/action.c: do_action(757) - ignoring 17(26) NOTICE: <script>: Found remote user [91XXX] on [sip.siptrunk.in] via [sip:10.*.33.1:5060] 17(26) INFO: tm [t_lookup.c:1333]: t_newtran(): attempt to create transaction for a faked request - try to avoid it 17(26) NOTICE: tm [t_reply.c:2159]: relay_reply(): dst no longer set - skipped sending the reply out

```

#### SIP Traffic

<!-- If the issue is exposed by processing specific SIP messages, grab them with ngrep or save in a pcap file, then add them next, or attach to issue, or provide a link to download them (e.g., to a pastebin site). -->

``` (paste your sip traffic here) ```

### Possible Solutions

<!-- If you found a solution or workaround for the issue, describe it. Ideally, provide a pull request with a fix. -->

### Additional Information

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

``` docker image kamailio/kamailio:5.4.6-buster ```

* **Operating System**:

<!-- Details about the operating system, the type: Linux (e.g.,: Debian 8.4, Ubuntu 16.04, CentOS 7.1, ...), MacOS, xBSD, Solaris, ...; Kernel details (output of `lsb_release -a` and `uname -a`) -->

``` "Debian GNU/Linux 10 (buster)"

```