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483 (too many hoops) and 403 (Rely forbidden)

2013-03-26
2013-05-09
  • I just installed opensips 1.9.0 from scratch and get the following error when testing server:

    root@sip:~# sipsak -T -s sip:1001@memorea.com -vv
    warning: IP extract from warning activated to be more informational
    Max-Forwards set to 0
    0: 'no Warning header found' (0.076 ms) SIP/2.0 483 Too Many Hops
    Max-Forwards set to 1
    1: 'no Warning header found' (211.197 ms) SIP/2.0 403 Rely forbidden
    without Contact header

    Debug server says:

    Mar 26 19:50:43  DBG:core:udp_rcv_loop: probing packet received len = 4
    Mar 26 19:50:43  DBG:core:parse_msg: SIP Request:
    Mar 26 19:50:43  DBG:core:parse_msg:  method:  <OPTIONS>
    Mar 26 19:50:43  DBG:core:parse_msg:  uri:     <sip:1001@memorea.com>
    Mar 26 19:50:43  DBG:core:parse_msg:  version: <SIP/2.0>
    Mar 26 19:50:43  DBG:core:parse_headers: flags=2
    Mar 26 19:50:43  DBG:core:parse_via_param: found param type 232, <branch> = <z9hG4bK.5ae68aca>; state=6
    Mar 26 19:50:43  DBG:core:parse_via_param: found param type 235, <rport> = <n/a>; state=6
    Mar 26 19:50:43  DBG:core:parse_via_param: found param type 237, <alias> = <n/a>; state=16
    Mar 26 19:50:43  DBG:core:parse_via: end of header reached, state=5
    Mar 26 19:50:43  DBG:core:parse_headers: via found, flags=2
    Mar 26 19:50:43  DBG:core:parse_headers: this is the first via
    Mar 26 19:50:43  DBG:core:receive_msg: After parse_msg…
    Mar 26 19:50:43  DBG:core:receive_msg: preparing to run routing scripts…
    Mar 26 19:50:43  DBG:core:parse_headers: flags=100
    Mar 26 19:50:43  DBG:core:parse_to: end of header reached, state=9
    Mar 26 19:50:43  DBG:core:parse_to: display={}, ruri={sip:1001@memorea.com}
    Mar 26 19:50:43  DBG:core:get_hdr_field: <To> ; uri=
    Mar 26 19:50:43  DBG:core:get_hdr_field: to body [sip:1001@memorea.com
    ]
    Mar 26 19:50:43  DBG:core:get_hdr_field: cseq <CSeq>: <1> <OPTIONS>
    Mar 26 19:50:43  DBG:core:get_hdr_field: content_length=0
    Mar 26 19:50:43  DBG:maxfwd:is_maxfwd_present: value = 0
    Mar 26 19:50:43  DBG:core:parse_headers: flags=ffffffffffffffff
    Mar 26 19:50:43  DBG:core:get_hdr_field: found end of header
    Mar 26 19:50:43  DBG:core:destroy_avp_list: destroying list (nil)
    Mar 26 19:50:43  DBG:core:receive_msg: cleaning up
    Mar 26 19:50:43  DBG:core:parse_msg: SIP Request:
    Mar 26 19:50:43  DBG:core:parse_msg:  method:  <OPTIONS>
    Mar 26 19:50:43  DBG:core:parse_msg:  uri:     <sip:1001@memorea.com>
    Mar 26 19:50:43  DBG:core:parse_msg:  version: <SIP/2.0>
    Mar 26 19:50:43  DBG:core:parse_headers: flags=2
    Mar 26 19:50:43  DBG:core:parse_via_param: found param type 232, <branch> = <z9hG4bK.1e4d969f>; state=6
    Mar 26 19:50:43  DBG:core:parse_via_param: found param type 235, <rport> = <n/a>; state=6
    Mar 26 19:50:43  DBG:core:parse_via_param: found param type 237, <alias> = <n/a>; state=16
    Mar 26 19:50:43  DBG:core:parse_via: end of header reached, state=5
    Mar 26 19:50:43  DBG:core:parse_headers: via found, flags=2
    Mar 26 19:50:43  DBG:core:parse_headers: this is the first via
    Mar 26 19:50:43  DBG:core:receive_msg: After parse_msg…
    Mar 26 19:50:43  DBG:core:receive_msg: preparing to run routing scripts…
    Mar 26 19:50:43  DBG:core:parse_headers: flags=100
    Mar 26 19:50:43  DBG:core:parse_to: end of header reached, state=9
    Mar 26 19:50:43  DBG:core:parse_to: display={}, ruri={sip:1001@memorea.com}
    Mar 26 19:50:43  DBG:core:get_hdr_field: <To> ; uri=
    Mar 26 19:50:43  DBG:core:get_hdr_field: to body [sip:1001@memorea.com
    ]
    Mar 26 19:50:43  DBG:core:get_hdr_field: cseq <CSeq>: <2> <OPTIONS>
    Mar 26 19:50:43  DBG:core:get_hdr_field: content_length=0
    Mar 26 19:50:43  DBG:maxfwd:is_maxfwd_present: value = 1
    Mar 26 19:50:43  DBG:uri:has_totag: no totag
    Mar 26 19:50:43  DBG:core:parse_headers: flags=78
    Mar 26 19:50:43  DBG:tm:t_lookup_request: start searching: hash=60249, isACK=0
    Mar 26 19:50:43  DBG:tm:matching_3261: RFC3261 transaction matching failed
    Mar 26 19:50:43  DBG:tm:t_lookup_request: no transaction found
    Mar 26 19:50:43  DBG:core:parse_to_param: tag=7aa0dc8b
    Mar 26 19:50:43  DBG:core:parse_to: end of header reached, state=29
    Mar 26 19:50:43  DBG:core:parse_to: display={}, ruri={sip:sipsak@127.0.0.1:38276}
    Mar 26 19:50:43  DBG:core:grep_sock_info: checking if host==us: 9==9 &&   ==
    Mar 26 19:50:43  DBG:core:grep_sock_info: checking if port 5060 matches port 38276
    Mar 26 19:50:43  DBG:core:check_self: host != me
    Mar 26 19:50:43  DBG:core:grep_sock_info: checking if host==us: 11==9 &&   ==
    Mar 26 19:50:43  DBG:core:grep_sock_info: checking if port 5060 matches port 5060
    Mar 26 19:50:43  DBG:core:check_self: host != me
    Mar 26 19:50:43  DBG:core:parse_headers: flags=ffffffffffffffff
    Mar 26 19:50:43  DBG:core:get_hdr_field: found end of header
    Mar 26 19:50:43  DBG:core:destroy_avp_list: destroying list (nil)
    Mar 26 19:50:43  DBG:core:receive_msg: cleaning up
    Mar 26 19:50:53  DBG:core:udp_rcv_loop: probing packet received len = 4

    Domain 'memorea.com' is configured in opensis and declared in hosts.conf (127.0.0.1 memorea.com).

    What's wrong? 

    Thanks for help.

     
  • Hi,

    Most probabaly your opensips is not recognizing the "memorea.com" as a local domain (in order to locally process the traffic) and it is looping the request.

    Add "alias=memorea.com" in your cfg as global param and re-test.

    Regards,
    Bogdan

     
  • Thanks for reply.

    I added in cfg:

    alias=sip.memorea.com

    and reconfigure user:

    root@sip:~# opensipsctl ul show
    Domain:: location table=512 records=1
    AOR:: 1000
    Contact:: sip:1000@sip.memorea.com Q=1
    Expires:: permanent
    Callid:: dfjrewr12386fd6-343@opensips.mi
    Cseq:: 1
    User-agent:: OpenSIPS MI Server
    State:: CS_SYNC
    Flags:: 0
    Cflag:: 0
    Methods:: 4294967295

    but 483 error persists:

    root@sip:~# sipsak -T -s sip:1000@sip.memorea.com -vv
    warning: IP extract from warning activated to be more informational
    Max-Forwards set to 0
    0: 'no Warning header found' (0.007 ms) SIP/2.0 483 Too Many Hops
    Max-Forwards set to 1
    1: 'no Warning header found' (219.902 ms) SIP/2.0 483 Too Many Hops
    Max-Forwards set to 2
    2: 'no Warning header found' (15.166 ms) SIP/2.0 483 Too Many Hops
    Max-Forwards set to 3
    3: 'no Warning header found' (49.054 ms) SIP/2.0 483 Too Many Hops
    Max-Forwards set to 4
    4: 'no Warning header found' (33.194 ms) SIP/2.0 483 Too Many Hops
    Max-Forwards set to 5
    5: 'no Warning header found' (69.334 ms) SIP/2.0 483 Too Many Hops
    Max-Forwards set to 6
    6: 'no Warning header found' (79.810 ms) SIP/2.0 483 Too Many Hops
    Max-Forwards set to 7
    7: 'no Warning header found' (125.480 ms) SIP/2.0 483 Too Many Hops
    Max-Forwards set to 8
    8: 'no Warning header found' (120.172 ms) SIP/2.0 483 Too Many Hops

    :-(

     
  • Hi,

    Your static registration is causing the loop - AOR 1000 (implicitly 1000@sip.memorea.com) points to contact 1000@sip.memorea.com …

    Regards,
    Bogdan

     
  • Not yet…

    I changed but not solve:

    root@sip:~# opensipsctl ul add test sip:1000@sip.memorea.com
    root@sip:~# opensipsctl ul show
    Domain:: location table=512 records=1
    AOR:: test
    Contact:: sip:1000@sip.memorea.com Q=1
    Expires:: permanent
    Callid:: dfjrewr12386fd6-343@opensips.mi
    Cseq:: 1
    User-agent:: OpenSIPS MI Server
    State:: CS_SYNC
    Flags:: 0
    Cflag:: 0
    Methods:: 4294967295
    root@sip:~#
    root@sip:~#
    root@sip:~#
    root@sip:~# sipsak -T -s sip:1000@sip.memorea.com -vv
    warning: IP extract from warning activated to be more informational
    Max-Forwards set to 0
    0: 'no Warning header found' (0.042 ms) SIP/2.0 483 Too Many Hops
    Max-Forwards set to 1
    1: 'no Warning header found' (0.018 ms) SIP/2.0 404 Not Found
    without Contact header
    root@sip:~#

    Debug server shows a lookup error:

    Mar 28 15:22:32  DBG:registrar:lookup: '1000' Not found in usrloc

    More information about this:

    Mar 28 15:22:32  DBG:core:parse_msg:  method:  <OPTIONS>
    Mar 28 15:22:32  DBG:core:parse_msg:  uri:     <sip:1000@sip.memorea.com>
    Mar 28 15:22:32  DBG:core:parse_msg:  version: <SIP/2.0>
    Mar 28 15:22:32  DBG:core:parse_headers: flags=2
    Mar 28 15:22:32  DBG:core:parse_via_param: found param type 232, <branch> = <z9hG4bK.4ad7035f>; state=6
    Mar 28 15:22:32  DBG:core:parse_via_param: found param type 235, <rport> = <n/a>; state=6
    Mar 28 15:22:32  DBG:core:parse_via_param: found param type 237, <alias> = <n/a>; state=16
    Mar 28 15:22:32  DBG:core:parse_via: end of header reached, state=5
    Mar 28 15:22:32  DBG:core:parse_headers: via found, flags=2
    Mar 28 15:22:32  DBG:core:parse_headers: this is the first via
    Mar 28 15:22:32  DBG:core:receive_msg: After parse_msg…
    Mar 28 15:22:32  DBG:core:receive_msg: preparing to run routing scripts…
    Mar 28 15:22:32  DBG:core:parse_headers: flags=100
    Mar 28 15:22:32  DBG:core:parse_to: end of header reached, state=9
    Mar 28 15:22:32  DBG:core:parse_to: display={}, ruri={sip:1000@sip.memorea.com}
    Mar 28 15:22:32  DBG:core:get_hdr_field: <To> ; uri=
    Mar 28 15:22:32  DBG:core:get_hdr_field: to body [sip:1000@sip.memorea.com
    ]
    Mar 28 15:22:32  DBG:core:get_hdr_field: cseq <CSeq>: <1> <OPTIONS>
    Mar 28 15:22:32  DBG:core:get_hdr_field: content_length=0
    Mar 28 15:22:32  DBG:maxfwd:is_maxfwd_present: value = 0
    Mar 28 15:22:32  DBG:core:parse_headers: flags=ffffffffffffffff
    Mar 28 15:22:32  DBG:core:get_hdr_field: found end of header
    Mar 28 15:22:32  DBG:core:destroy_avp_list: destroying list (nil)
    Mar 28 15:22:32  DBG:core:receive_msg: cleaning up
    Mar 28 15:22:32  DBG:core:parse_msg: SIP Request:
    Mar 28 15:22:32  DBG:core:parse_msg:  method:  <OPTIONS>
    Mar 28 15:22:32  DBG:core:parse_msg:  uri:     <sip:1000@sip.memorea.com>
    Mar 28 15:22:32  DBG:core:parse_msg:  version: <SIP/2.0>
    Mar 28 15:22:32  DBG:core:parse_headers: flags=2
    Mar 28 15:22:32  DBG:core:parse_via_param: found param type 232, <branch> = <z9hG4bK.33700eac>; state=6
    Mar 28 15:22:32  DBG:core:parse_via_param: found param type 235, <rport> = <n/a>; state=6
    Mar 28 15:22:32  DBG:core:parse_via_param: found param type 237, <alias> = <n/a>; state=16
    Mar 28 15:22:32  DBG:core:parse_via: end of header reached, state=5
    Mar 28 15:22:32  DBG:core:parse_headers: via found, flags=2
    Mar 28 15:22:32  DBG:core:parse_headers: this is the first via
    Mar 28 15:22:32  DBG:core:receive_msg: After parse_msg…
    Mar 28 15:22:32  DBG:core:receive_msg: preparing to run routing scripts…
    Mar 28 15:22:32  DBG:core:parse_headers: flags=100
    Mar 28 15:22:32  DBG:core:parse_to: end of header reached, state=9
    Mar 28 15:22:32  DBG:core:parse_to: display={}, ruri={sip:1000@sip.memorea.com}
    Mar 28 15:22:32  DBG:core:get_hdr_field: <To> ; uri=
    Mar 28 15:22:32  DBG:core:get_hdr_field: to body [sip:1000@sip.memorea.com
    ]
    Mar 28 15:22:32  DBG:core:get_hdr_field: cseq <CSeq>: <2> <OPTIONS>
    Mar 28 15:22:32  DBG:core:get_hdr_field: content_length=0
    Mar 28 15:22:32  DBG:maxfwd:is_maxfwd_present: value = 1
    Mar 28 15:22:32  DBG:uri:has_totag: no totag
    Mar 28 15:22:32  DBG:core:parse_headers: flags=78
    Mar 28 15:22:32  DBG:tm:t_lookup_request: start searching: hash=17833, isACK=0
    Mar 28 15:22:32  DBG:tm:matching_3261: RFC3261 transaction matching failed
    Mar 28 15:22:32  DBG:tm:t_lookup_request: no transaction found
    Mar 28 15:22:32  DBG:core:parse_to_param: tag=5088ed97
    Mar 28 15:22:32  DBG:core:parse_to: end of header reached, state=29
    Mar 28 15:22:32  DBG:core:parse_to: display={}, ruri={sip:sipsak@127.0.0.1:34401}
    Mar 28 15:22:32  DBG:core:grep_sock_info: checking if host==us: 9==9 &&   ==
    Mar 28 15:22:32  DBG:core:grep_sock_info: checking if port 5060 matches port 34401
    Mar 28 15:22:32  DBG:core:check_self: host != me
    Mar 28 15:22:32  DBG:core:grep_sock_info: checking if host==us: 15==9 &&   ==
    Mar 28 15:22:32  DBG:core:grep_sock_info: checking if port 5060 matches port 5060
    Mar 28 15:22:32  DBG:core:parse_headers: flags=200
    Mar 28 15:22:32  DBG:core:get_hdr_field: found end of header
    Mar 28 15:22:32  DBG:rr:find_first_route: No Route headers found
    Mar 28 15:22:32  DBG:rr:loose_route: There is no Route HF
    Mar 28 15:22:32  DBG:core:grep_sock_info: checking if host==us: 15==9 &&   ==
    Mar 28 15:22:32  DBG:core:grep_sock_info: checking if port 5060 matches port 5060
    Mar 28 15:22:32  DBG:registrar:lookup: '1000' Not found in usrloc
    Mar 28 15:22:32  DBG:tm:t_newtran: transaction on entrance=(nil)
    Mar 28 15:22:32  DBG:core:parse_headers: flags=ffffffffffffffff
    Mar 28 15:22:32  DBG:core:parse_headers: flags=78
    Mar 28 15:22:32  DBG:tm:t_lookup_request: start searching: hash=17833, isACK=0
    Mar 28 15:22:32  DBG:tm:matching_3261: RFC3261 transaction matching failed
    Mar 28 15:22:32  DBG:tm:t_lookup_request: no transaction found
    Mar 28 15:22:32  DBG:tm:run_reqin_callbacks: trans=0x7f96f5a5f5f0, callback type 1, id 1 entered
    Mar 28 15:22:32  DBG:tm:run_reqin_callbacks: trans=0x7f96f5a5f5f0, callback type 1, id 0 entered
    Mar 28 15:22:32  DBG:core:parse_headers: flags=ffffffffffffffff
    Mar 28 15:22:32  DBG:core:_shm_resize: resize(0) called
    Mar 28 15:22:32  DBG:tm:cleanup_uac_timers: RETR/FR timers reset
    Mar 28 15:22:32  DBG:tm:insert_timer_unsafe: : 0x7f96f5a5f670 (843)
    Mar 28 15:22:32  DBG:tm:_reply_light: reply sent out. buf=0x7f96fd0c1900: SIP/2.0 4…, shmem=0x7f96f5a59cb0: SIP/2.0 4
    Mar 28 15:22:32  DBG:tm:_reply_light: finished
    Mar 28 15:22:32  DBG:tm:t_unref: UNREF_UNSAFE:  after is 0
    Mar 28 15:22:32  DBG:core:destroy_avp_list: destroying list (nil)
    Mar 28 15:22:32  DBG:core:receive_msg: cleaning up
    Mar 28 15:22:38  DBG:tm:timer_routine: timer routine:2,tl=0x7f96f5a5f670 next=(nil), timeout=843
    Mar 28 15:22:38  DBG:tm:wait_handler: removing 0x7f96f5a5f5f0 from table
    Mar 28 15:22:38  DBG:tm:delete_cell: delete transaction 0x7f96f5a5f5f0
    Mar 28 15:22:38  DBG:tm:wait_handler: done

    And follow the opensips.cfg file:

    fork=yes
    children=4

    /* uncomment the following lines to enable debugging */
    debug=6
    #fork=no
    log_stderror=yes

    /* uncomment the next line to enable the auto temporary blacklisting of
       not available destinations (default disabled) */
    #disable_dns_blacklist=no

    /* uncomment the next line to enable IPv6 lookup after IPv4 dns
       lookup failures (default disabled) */
    #dns_try_ipv6=yes

    /* comment the next line to enable the auto discovery of local aliases
       based on revers DNS on IPs */
    auto_aliases=no

    alias=sip.memorea.com

    listen=udp:127.0.0.1:5060   # CUSTOMIZE ME

    disable_tcp=yes
    disable_tls=yes

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

    #set module path
    mpath="/usr/local/lib64/opensips/modules/"

    #### SIGNALING module
    loadmodule "signaling.so"

    #### StateLess module
    loadmodule "sl.so"

    #### Transaction Module
    loadmodule "tm.so"
    modparam("tm", "fr_timer", 5)
    modparam("tm", "fr_inv_timer", 30)
    modparam("tm", "restart_fr_on_each_reply", 0)
    modparam("tm", "onreply_avp_mode", 1)

    #### Record Route Module
    loadmodule "rr.so"
    modparam("rr", "append_fromtag", 0)

    #### MAX ForWarD module
    loadmodule "maxfwd.so"

    #### SIP MSG OPerationS module
    loadmodule "sipmsgops.so"

    #### FIFO Management Interface
    loadmodule "mi_fifo.so"
    modparam("mi_fifo", "fifo_name", "/tmp/opensips_fifo")
    modparam("mi_fifo", "fifo_mode", 0666)

    #### URI module
    loadmodule "uri.so"
    modparam("uri", "use_uri_table", 0)

    #### Dialog module
    loadmodule "dialog.so"
    modparam("dialog", "db_url", "mysql://opensips:opensipsrw@localhost/opensips")
    #modparam("dialog", "db_mode", "2")

    #### Domain module
    loadmodule "domain.so"
    modparam("domain", "db_url", "mysql://opensips:opensipsrw@localhost/opensips")
    modparam("domain", "db_mode", 2)

    #### USeR LOCation module
    loadmodule "usrloc.so"
    modparam("usrloc", "nat_bflag", "NAT")
    modparam("usrloc", "db_mode", 2)
    modparam("usrloc", "db_url", "mysql://opensips:opensipsrw@localhost/opensips")

    #### REGISTRAR module
    loadmodule "registrar.so"
    modparam("registrar", "tcp_persistent_flag", "TCP_PERSISTENT")

    /* uncomment the next line not to allow more than 10 contacts per AOR */
    #modparam("registrar", "max_contacts", 10)

    #### ACCounting module
    loadmodule "acc.so"
    modparam("acc", "early_media", 0)
    modparam("acc", "report_cancels", 0)
    modparam("acc", "detect_direction", 0)
    modparam("acc", "failed_transaction_flag", "ACC_FAILED")
    modparam("acc", "log_flag", "ACC_DO")
    modparam("acc", "log_missed_flag", "ACC_MISSED")

    loadmodule "alias_db.so"
    modparam("alias_db", "db_url", "mysql://opensips:opensipsrw@localhost/opensips")

    loadmodule "db_mysql.so"

    loadmodule "auth.so"

    loadmodule "auth_db.so"
    modparam("auth_db", "calculate_ha1", yes)
    modparam("auth_db", "password_column", "password")
    modparam("auth_db", "db_url", "mysql://opensips:opensipsrw@localhost/opensips")
    modparam("auth_db", "load_credentials", "")

    ####### Routing Logic ########

    # main request routing logic

    route{
    if (!mf_process_maxfwd_header("10")) {
    sl_send_reply("483","Too Many Hops");
    exit;
    }

    if (has_totag()) {
    # sequential request withing a dialog should
    # take the path determined by record-routing
    if (loose_route()) {
    if (is_method("BYE")) {
    setflag(ACC_DO); # do accounting …
    setflag(ACC_FAILED); # … even if the transaction fails
    } else if (is_method("INVITE")) {
    # even if in most of the cases is useless, do RR for
    # re-INVITEs alos, as some buggy clients do change route set
    # during the dialog.
    record_route();
    }

    # route it out to whatever destination was set by loose_route()
    # in $du (destination URI).
    route(relay);
    } else {
    if ( is_method("ACK") ) {
    if ( t_check_trans() ) {
    # non loose-route, but stateful ACK; must be an ACK after
    # a 487 or e.g. 404 from upstream server
    t_relay();
    exit;
    } else {
    # ACK without matching transaction ->
    # ignore and discard
    exit;
    }
    }
    sl_send_reply("404","Not here");
    }
    exit;
    }

    # CANCEL processing
    if (is_method("CANCEL"))
    {
    if (t_check_trans())
    t_relay();
    exit;
    }

    t_check_trans();

    if ( !(is_method("REGISTER")  ) ) {
    if (from_uri==myself)
    {
    } else {
    # if caller is not local, then called number must be local
    if (!uri==myself) {
    send_reply("403","Rely forbidden");
    exit;
    }
    }
    }

    # preloaded route checking
    if (loose_route()) {
    xlog("L_ERR",
    "Attempt to route with preloaded Route's ");
    if (!is_method("ACK"))
    sl_send_reply("403","Preload Route denied");
    exit;
    }

    # record routing
    if (!is_method("REGISTER|MESSAGE"))
    record_route();

    # account only INVITEs
    if (is_method("INVITE")) {
    setflag(ACC_DO); # do accounting
    }

    if (!uri==myself) {
    append_hf("P-hint: outbound\r\n");
    route(relay);
    }

    # requests for my domain
    if (is_method("PUBLISH|SUBSCRIBE"))
    {
    sl_send_reply("503", "Service Unavailable");
    exit;
    }

    if (is_method("REGISTER"))
    {
    if (   0 ) setflag(TCP_PERSISTENT);

    if (!save("location"))
    sl_reply_error();

    exit;
    }

    if ($rU==NULL) {
    # request with no Username in RURI
    sl_send_reply("484","Address Incomplete");
    exit;
    }

    # do lookup with method filtering
    if (!lookup("location","m")) {
    t_newtran();
    t_reply("404", "Not Found");
    exit;
    }

    # when routing via usrloc, log the missed calls also
    setflag(ACC_MISSED);
    route(relay);
    }

    route {
    # for INVITEs enable some additional helper routes
    if (is_method("INVITE")) {
    t_on_branch("per_branch_ops");
    t_on_reply("handle_nat");
    t_on_failure("missed_call");
    }

    if (!t_relay()) {
    send_reply("500","Internal Error");
    };
    exit;
    }

    branch_route {
    xlog("new branch at $ru\n");
    }

    onreply_route {

    xlog("incoming reply\n");
    }

    failure_route {
    if (t_was_cancelled()) {
    exit;
    }

    # uncomment the following lines if you want to block client
    # redirect based on 3xx replies.
    ##if (t_check_status("3")) {
    ##t_reply("404","Not found");
    ## exit;
    ##}

    }

    Thanks.

     
  • What exactly are you trying to achieve here ?

    Regards,
    Bogdan