[Spce-user] Missing Max-Forwards Header

Jon Bonilla (Manwe) jbonilla at sipwise.com
Tue Jan 14 03:04:48 EST 2014


El Wed, 8 Jan 2014 23:12:23 +0000
"Schaefer, Larry" <Larry.Schaefer at pgi.com> escribió:

> Daniel,
> 
> Thanks for the quick response, but it did not fix my issue... When the SBC
> sends the Bye, still no Max-Forwards header on the request... Since the
> Max-Forwards is sent on the Invite (from SBC to my SIP app), do you think
> this could be a bug with the SBC sending the Bye to my SIP app?  
> 
> Below is my different config files in case you see anything that might be
> missing:
> 
> sbc.conf:
> ----------------------
> profiles=symmetricrtp
> active_profile=symmetricrtp
> ----------------------
> 
> symmetricrtp.sbcprofile.conf:
> ---------


Hi Larry

Did you try with append_headers like configuration setting?



From the Readme:

Adding headers
--------------
Additional headers can be added to the outgoing initial INVITE by using the
append_headers call profile option. Here, several headers can be separated with
\r\n. All replacement patterns from above can be used.

Examples:
 append_headers="P-Received-IP: $Ri\r\nP-Received-Port: $Rp"
 append_headers="P-Source-IP: $si\r\nP-Source-Port: $sp\r\n"
 append_headers="P-Original-URI: $r"



------------
> # symmetricrtp SBC profile
> #
> # This implements a transparent B2BUA which relays RTP and forces
> # symmetric RTP on both sides - thus being able to bridge between
> # two NATed clients
> 
> # RURI/From/To defaults: transparent
> #RURI=$r
> #From=$f
> #To=$t
> 
> ## RTP relay
> # enable RTP relaying (bridging):
> enable_rtprelay=yes
> # force symmetric RTP (start with passive mode):
> rtprelay_force_symmetric_rtp=yes
> # use symmetric RTP indication from P-MsgFlags flag 2
> #rtprelay_msgflags_symmetric_rtp=yes
> 
> # outbound interface to use:
> #outbound_interface=extern
> 
> next_hop_ip=10.2.62.78
> 
> Call-ID=$ci_leg2
> 
> append_headers="P-Source-IP: $si\r\nP-Source-Port: $sp\r\n"
> 
> header_filter=whitelist
> header_list=P-D-Uri,P-Asserted-Identity,Privacy,WWW-Authenticate,Proxy-Authenticate,Max-Forwards 
> ----------------------
> 
> Sems.conf:
> ----------------------
> fork=yes
> stderr=no
> loglevel=2
> 
> sip_ip=10.81.224.232
> media_ip=10.81.224.232
> sip_port=5060
> rtp_low_port=40001
> rtp_high_port=50000
> 
> plugin_path=/usr/lib/sems/plug-in/
> plugin_config_path=/etc/sems/etc
> 
> load_plugins=wav;gsm;xmlrpc2di;di_dial;stats;uac_auth;session_timer;click2dial;conference;sbc;registrar_client;reg_agent;db_reg_agent;dsm
> 
> application=sbc
> 
> media_processor_threads=10
> 
> use_default_signature=no
> signature="Sipwise NGCP Application Server"
> single_codec_in_ok=no
> codec_order=PCMA;PCMU
> 
> unhandled_reply_loglevel=info
> accept_fr_without_totag=yes
> wait_for_bye_transaction=yes
> sip_timer_b=6000
> sip_timer_f=6000
> 
> #disable rtp timeout
> dead_rtp_time=0
> ----------------------
> 
> Config.yml (only the sems block):
> -----------------------
> sems:
>   bindport: 5060
>   conference:
>     enable: 'yes'
>     max_participants: 10
>   highport: 50000
>   lowport: 40001
>   sbc:
>     calltimer_enable: 'no'
>     calltimer_max: 21600
>     outbound_timeout: 6000
>     sdp_filter:
>       codecs: PCMA,PCMU,telephone-event
>       enable: 'yes'
>       mode: whitelist
>     session_timer:
>       enable: 'yes'
>       max_timer: 7200
>       min_timer: 90
>       session_expires: 300
>   vsc:
>     block_override_code: 80
>     cfb_code: 90
>     cfna_code: 93
>     cft_code: 92
>     cfu_code: 72
>     clir_code: 31
>     enable: 'no'
>     reminder_code: 55
>     speedial_code: 50
>     voicemail_number: 2000
>   xmlrpcport: 8090
> -----------------------
> 
> Thanks,
> Larry
> 
> -----Original Message-----
> From: spce-user-bounces at lists.sipwise.com
> [mailto:spce-user-bounces at lists.sipwise.com] On Behalf Of Daniel Grotti Sent:
> Wednesday, January 08, 2014 2:47 PM To: spce-user at lists.sipwise.com
> Subject: Re: [Spce-user] Missing Max-Forwards Header
> 
> Is the same on 3.1 and 2.8.
> You have nevere experienced that issue cause you're using the LB (that add
> the Max-Forwards header). Larry seems is not using LB.
> 
> Daniel
> 
> 
> 
> On 01/08/2014 10:41 PM, Daniel Grotti wrote:
> > Hi,
> > Max-Forwards is removed by sems from proxy to lb.
> > LB is setting a new header with value 10 (by default, you can change 
> > it from config.yml).
> > 
> > I suggest Larry to add in
> > /etc/ngcp-config/templates/etc/sems/etc/ngcp.sbcprofile.conf.tt2 the 
> > Max-Forwards in the whitelist.
> > 
> > In this way the header shouldn't be removed.
> > 
> > Daniel
> > 
> > 
> > 
> > 
> > On 01/08/2014 10:30 PM, Kevin Masse wrote:
> >> Daniel, are you recommending it be added in this location in version 2.8
> >> also? In the 2.8 I show ngcp.sbcprofile.conf.tt2 vs ngcp.sbcprofile.conf
> >> and it is not listed.  Additionally we have never experienced this issue
> >> that Larry is reporting.
> >>
> >> Kevin
> >>
> >>
> >>
> >> -----Original Message-----
> >> From: Daniel Grotti [mailto:dgrotti at sipwise.com]
> >> Sent: Wednesday, January 08, 2014 4:23 PM
> >> To: Schaefer, Larry
> >> Cc: Kevin Masse; spce-user at lists.sipwise.com
> >> Subject: Re: [Spce-user] Missing Max-Forwards Header
> >>
> >> Hi Larry,
> >> try to enable in the sems whitelist
> >> in /etc/ngcp-config/templates/etc/sems/etc/ngcp.sbcprofile.conf the
> >> Max-Forwards header, otherwise it will be removed. header_filter=whitelist
> >> header_list=P-D-Uri,P-Asserted-Identity,Privacy,WWW-Authenticate,Prox
> >> y-Authenticate,Max-Forwards
> >>
> >>
> >> Daniel
> >>
> >>
> >>
> >>
> >> On Wednesday, January 8, 2014 21:35 CET, "Schaefer, Larry"
> >> <Larry.Schaefer at pgi.com> wrote: 
> >>> Kevin,
> >>>
> >>> Thanks for the quick response... That value is listed in the kamailio lb
> >>> section with a value of 10.  However, in my example, I was not using the
> >>> load balancer.  I was just testing directly with sending an Invite (from
> >>> a softphone client) directly to the SBC and watching what came out of the
> >>> SBC...  I also believe that I am on the 3.1 version.
> >>>
> >>> kamailio:
> >>>   lb:
> >>>     debug: 'no'
> >>>     extra_sockets: ~
> >>>     max_forwards: 10
> >>>     nattest_exception_ips: ~
> >>>     pkg_mem: 16
> >>>     port: 5080
> >>>     security:
> >>>       dos_ban_enable: 'yes'
> >>>       dos_ban_time: 300
> >>>       dos_reqs_density_per_unit: 50
> >>>       dos_sampling_time_unit: 5
> >>>       dos_whitelisted_ips: ~
> >>>       failed_auth_attempts: 3
> >>>       failed_auth_ban_enable: 'yes'
> >>>       failed_auth_ban_time: 3600
> >>>     shm_mem: 466
> >>>     start: 'yes'
> >>>     tcp_children: 8
> >>>     tcp_max_connections: 2048
> >>>     tls:
> >>>       enable: 'yes'
> >>>       port: 5061
> >>>       sslcertfile: '/etc/kamailio/kamailio-selfsigned.pem'
> >>>       sslcertkeyfile: '/etc/kamailio/kamailio-selfsigned.key'
> >>>     udp_children: 8
> >>>
> >>> Looking further in that file, I have found the settings for the sems sbc
> >>> component.  I did chance the bindport and turned off a couple options
> >>> which I did not need (like conferencing) but see nothing in that section
> >>> about max-forwards.
> >>>
> >>> sems:
> >>>   bindport: 5060
> >>>   conference:
> >>>     enable: 'no'
> >>>     max_participants: 10
> >>>   highport: 50000
> >>>   lowport: 40001
> >>>   sbc:
> >>>     calltimer_enable: 'yes'
> >>>     calltimer_max: 21600
> >>>     outbound_timeout: 6000
> >>>     sdp_filter:
> >>>       codecs: PCMA,PCMU,telephone-event
> >>>       enable: 'no'
> >>>       mode: whitelist
> >>>     session_timer:
> >>>       enable: 'yes'
> >>>       max_timer: 7200
> >>>       min_timer: 90
> >>>       session_expires: 300
> >>>   vsc:
> >>>     block_override_code: 80
> >>>     cfb_code: 90
> >>>     cfna_code: 93
> >>>     cft_code: 92
> >>>     cfu_code: 72
> >>>     clir_code: 31
> >>>     enable: 'no'
> >>>     reminder_code: 55
> >>>     speedial_code: 50
> >>>     voicemail_number: 2000
> >>>   xmlrpcport: 8090
> >>>
> >>> Thanks,
> >>> Larry
> >>>
> >>> From: Kevin Masse [mailto:kmasse at questblue.com]
> >>> Sent: Wednesday, January 08, 2014 1:20 PM
> >>> To: Schaefer, Larry; spce-user at lists.sipwise.com
> >>> Subject: RE: [Spce-user] Missing Max-Forwards Header
> >>>
> >>> Good afternoon Larry, take a look in your 
> >>> /etc/ngcp-config/config.yml file around line 60 +
> >>>
> >>> You should have something like this:   max_forwards=70
> >>>
> >>> kamailio:
> >>>   lb:
> >>>     b2buas:
> >>>       - sip\:127.0.0.1\:5080
> >>>     extra_sockets: ~
> >>>     max_forwards: 70
> >>>     pkg_mem: 16
> >>>     port: 5060
> >>>     proxies:
> >>>       - sip\:127.0.0.1\:5062
> >>>
> >>>
> >>> See if that will do away with the error.  I do see in your example 
> >>> below in RED Max-Forwards: 70 but lets verify the config.yml I 
> >>> should also mention my information is related to 2.8
> >>>
> >>> Kevin
> >>>
> >>>
> >>>
> >>> From: 
> >>> spce-user-bounces at lists.sipwise.com<mailto:spce-user-bounces at lists.s
> >>> ip wise.com> [mailto:spce-user-bounces at lists.sipwise.com] On Behalf 
> >>> Of Schaefer, Larry
> >>> Sent: Wednesday, January 08, 2014 2:22 PM
> >>> To: spce-user at lists.sipwise.com<mailto:spce-user at lists.sipwise.com>
> >>> Subject: [Spce-user] Missing Max-Forwards Header
> >>>
> >>> Hello... I am just getting started using SEMS with SBC application.  I am
> >>> seeing an issue where after I hang up a call, the BYE being sent to my
> >>> SIP application server does not contain a Max-Forwards header.  This
> >>> causes my SIP stack throw the following error:  "Missing a required
> >>> header : Max-Forwards".
> >>>
> >>> The BYE message going into the SBC has an Max-Forwards, but when it
> >>> leaves the SBC, it does not.  The logs below are from the sems.log file
> >>> that show the messages I am seeing.  The final message is the one that I
> >>> am having an issue with.
> >>>
> >>> Original Invite to SBC:
> >>>
> >>> Jan  8 19:08:13 sipwise sems[12819]: [#7fe230676700] [run, 
> >>> udp_trsp.cpp:213] DEBUG: vv M [|] u recvd msg via UDP 
> >>> vv#012--++--#012INVITE sip:17193860006 at 10.81.224.232
> >>> SIP/2.0#015#012Via: SIP/2.0/UDP
> >>> 10.2.62.78:44912;branch=z9hG4bK-d8754z-4058c4102839a274-1---d8754z-;
> >>> rp
> >>> ort#015#012Max-Forwards: 70#015#012Contact: 
> >>> <sip:3333 at 10.2.62.78:44912>#015#012To: 
> >>> "100"<sip:17193860006 at 10.81.224.232>#015#012From: 
> >>> "3333"<sip:3333 at 10.2.62.78>;tag=d6147351#015#012Call-ID: 
> >>> MjNhZDViYTRmZTdiNWQwODc1NGU4MGU5YTQwOTllZTE.#015#012CSeq: 1
> >>> INVITE#015#012Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, 
> >>> NOTIFY, MESSAGE, SUBSCRIBE, INFO#015#012Content-Type:
> >>> application/sdp#015#012User-Agent: eyeBeam release 1105z stamp
> >>> 59031#015#012Content-Length: 180#015#012#015#012v=0#015#012o=- 9 2 
> >>> IN
> >>> IP4 10.2.62.78#015#012s=CounterPath eyeBeam 1.5#015#012c=IN IP4
> >>> 10.2.62.78#015#012t=0 0#015#012m=audio 55426 RTP/AVP 0
> >>> 101#015#012a=fmtp:101 0-15#015#012a=rtpmap:101
> >>> telephone-event/8000#015#012a=sendrecv#015#012--++--
> >>>
> >>> New Invite from SBC to my SIP Server:
> >>>
> >>> Jan  8 19:08:13 sipwise sems[12819]: [#7fe231c8c700] [send, 
> >>> transport.cpp:98] DEBUG: send  msg#012--++--#012INVITE
> >>> sip:17193860006 at 10.81.224.232 SIP/2.0#015#012Via: SIP/2.0/UDP
> >>> 10.81.224.232;branch=z9hG4bKCSNunal9;rport#015#012From: "3333" 
> >>> <sip:3333 at 10.2.62.78>;tag=3221B159-52CDA21D000EE81D-31D8D700#015#012
> >>> To
> >>> : "100"<sip:17193860006 at 10.81.224.232>#015#012CSeq: 10
> >>> INVITE#015#012Call-ID: 
> >>> MjNhZDViYTRmZTdiNWQwODc1NGU4MGU5YTQwOTllZTE._leg2#015#012Contact: 
> >>> <sip:10.81.224.232:5060>#015#012Max-Forwards: 70#015#012Allow: 
> >>> INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, 
> >>> SUBSCRIBE,
> >>> INFO#015#012User-Agent: eyeBeam release 1105z stamp
> >>> 59031#015#012P-Source-IP: 10.2.62.78#015#012P-Source-Port: 
> >>> 44912#015#012Content-Type: application/sdp#015#012Content-Length: 
> >>> 166#015#012#015#012v=0#015#012o=- 9 2 IN IP4 
> >>> 10.2.62.78#015#012s=CounterPath eyeBeam 1.5#015#012c=IN IP4
> >>> 10.81.224.232#015#012t=0 0#015#012m=audio 40002 RTP/AVP 0
> >>> 101#015#012a=rtpmap:101 telephone-event/8000#015#012a=sendrec
> >>  v#015#01
> >>  2--++--
> >>>
> >>> Bye sent to SBC:
> >>>
> >>> Jan  8 19:08:18 sipwise sems[12819]: [#7fe230676700] [run, 
> >>> udp_trsp.cpp:213] DEBUG: vv M [|] u recvd msg via UDP 
> >>> vv#012--++--#012BYE sip:17193860006 at 10.81.224.232:5060
> >>> SIP/2.0#015#012Via: SIP/2.0/UDP
> >>> 10.2.62.78:44912;branch=z9hG4bK-d8754z-7b597f277435f31e-1---d8754z-;
> >>> rp
> >>> ort#015#012Max-Forwards: 70#015#012Contact: 
> >>> <sip:3333 at 10.2.62.78:44912>#015#012To: 
> >>> "100"<sip:17193860006 at 10.81.224.232>;tag=7E3767AC-52CDA21D000EE063-3
> >>> 06
> >>> 76700#015#012From: 
> >>> "3333"<sip:3333 at 10.2.62.78>;tag=d6147351#015#012Call-ID: 
> >>> MjNhZDViYTRmZTdiNWQwODc1NGU4MGU5YTQwOTllZTE.#015#012CSeq: 2
> >>> BYE#015#012User-Agent: eyeBeam release 1105z stamp
> >>> 59031#015#012Reason: SIP;description="User Hung
> >>> Up"#015#012Content-Length: 0#015#012#015#012--++--
> >>>
> >>> Bye sent to my SIP server (no Max-Forwards header):
> >>>
> >>> Jan  8 19:08:18 sipwise sems[12819]: [#7fe231c8c700] [send, 
> >>> transport.cpp:98] DEBUG: send  msg#012--++--#012BYE
> >>> sip:17193860006 at 10.2.62.78 SIP/2.0#015#012Via: SIP/2.0/UDP
> >>> 10.81.224.232;branch=z9hG4bKBQ3b.aXk;rport#015#012From: "3333" 
> >>> <sip:3333 at 10.2.62.78>;tag=3221B159-52CDA21D000EE81D-31D8D700#015#012
> >>> To
> >>> : "100"<sip:17193860006 at 10.81.224.232>;tag=367319031#015#012CSeq: 11
> >>> BYE#015#012Call-ID: 
> >>> MjNhZDViYTRmZTdiNWQwODc1NGU4MGU5YTQwOTllZTE._leg2#015#012Content-Len
> >>> gt
> >>> h: 0#015#012#015#012--++--
> >>>
> >>> Is there anything I am doing wrong?  I have been searching, but not found
> >>> any settings that seem to deal with Max-Forwards.
> >>>
> >>> Thanks,
> >>> Larry Schaefer
> >>>
> >>  
> >>  
> >>  
> >>  
> >>
> > 
> > _______________________________________________
> > Spce-user mailing list
> > Spce-user at lists.sipwise.com
> > http://lists.sipwise.com/listinfo/spce-user
> > 
> 
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