[SR-Users] kamailio 4.4.4 fills IPv6 contact address when sending packet over IPv4

Fri Jul 12 08:46:40 CEST 2019

Are you sure Linphone is not setting it?  Get a trace from client side, for
some reason I’ve my doubts kamailio is defaulting to an ipv6 address.

On Thu, Jul 11, 2019 at 11:42 PM Pali Rohár <pali.rohar at gmail.com> wrote:

> Hi!
>
> I have not set pua_reginfo parameter. Should I set it? And if yes to
> which value? There should be at least settings for packets outgoing via
> IPv4 and another setting for packets outgoing via IPv6.
>
> On Thursday 11 July 2019 06:46:35 YASIN CANER wrote:
> > Hello,
> >
> > did you try to set parameter server address?
> >
> http://kamailio.org/docs/modules/5.2.x/modules/pua_reginfo.html#idm1031504764
> > pua_reginfo Module - kamailio.org<
> http://kamailio.org/docs/modules/5.2.x/modules/pua_reginfo.html#idm1031504764
> >
> > Keeping different Servers in Sync regarding the location database Get
> notified, when a user registers: A presence-server, which handles offline
> message storage for an account, would get notified, when the user comes
> online.
> > kamailio.org
> >
> >
> > Yasin CANER
> >
> > ________________________________
> > From: sr-users <sr-users-bounces at lists.kamailio.org> on behalf of Pali
> Rohár <pali.rohar at gmail.com>
> > Sent: Wednesday, July 10, 2019 9:29 PM
> > To: sr-users at lists.kamailio.org
> > Subject: Re: [SR-Users] kamailio 4.4.4 fills IPv6 contact address when
> sending packet over IPv4
> >
> > Hi! Do you have any idea why Kamailio fills incorrect address into
> > Contact header? And how to avoid it?
> >
> > On Sunday 30 June 2019 23:11:22 Pali Rohár wrote:
> > > Hi!
> > >
> > > I detected strange problem that sip.linphone.org refuse to accept
> > > presence information re-transmitted by kamailio 4.4.4 server.
> > >
> > > I debug this problem with tcpdump and I found out that problem is in
> > > kamailio which fills IPv6 address into UDP datagram and that datagram
> is
> > > sent via IPv4 socket to IPv4 address, to sip.linphone.org server. And
> > > sip.linphone.org server does not have IPv6 connectivity, so correctly
> > > return over IPv4 to sender just "400 Bad Contact Header" error.
> > >
> > > On my server is running kamailio 4.4.4 from Debian Stretch and I can
> > > 100% reproduce this problem against public sip.linphone.org server.
> > >
> > > My server has both IPv4 and IPv6 connectivity and kamailio is listening
> > > for both IPv4 and IPv6 connections.
> > >
> > > So why is kamailio sending IPv6 address over IPv4 and therefore makes
> it
> > > impossible to communicate with non-IPv6 enabled servers? Looks like a
> > > problem with choosing default/correct socket for Contact header.
> > >
> > > And how to fix this problem? Can you help me? I would like to have
> > > working interconnection with linphone servers.
> > >
> > > Just to note I'm seeing this problem only for presence information
> > > packets. Other requests, like INVITE or MESSAGE seems to work.
> > >
> > > Below is relevant tcpdump output. Some parts were replaced by {VAR}.
> > >
> > > PS: I'm not subscribed to list, so please CC my address when sending
> > > reply. Thank you!
> > >
> > >
> > > 17:22:58.121719 IP (tos 0x10, ttl 64, id 21629, offset 0, flags
> [none], proto UDP (17), length 1266)
> > >     {MY_IPV4_ADDRESS}.5060 > 91.121.209.194.5060: [bad udp cksum
> 0xa099 -> 0x9825!] SIP, length: 1238
> > >         NOTIFY sip:{REMOTE_NAME}@{REMOTE_USER_IPV4_ADDRESS}:5060;registering_acc=sip_linphone_org
> SIP/2.0
> > >         Via: SIP/2.0/UDP
> {MY_IPV4_ADDRESS};branch=z9hG4bK2b55.88f93c20000000000000000000000000.0
> > >         To: <sip:{REMOTE_NAME}@sip.linphone.org>;tag=75559182
> > >         From:
> <sip:{MY_SIP_URI}>;tag=97d8e785fdf42bf9622a64c13c504961-2708
> > >         CSeq: 2 NOTIFY
> > >         Call-ID: 26cf9d5c019af2dc3302b770887bcc2e at 0:0:0:0:0:0:0:0
> > >         Route: <sip:91.121.209.194:5060;lr>
> > >         Content-Length: 597
> > >         User-Agent: kamailio (4.4.4 (x86_64/linux))
> > >         Max-Forwards: 70
> > >         Event: presence
> > >         Contact: <sip:{MY_IPV6_ADDRESS}:5060;transport=udp>
> > >         Subscription-State: active;expires=3600
> > >         Content-Type: application/pidf+xml
> > >
> > >         <?xml version="1.0" encoding="UTF-8"?>
> > >         <presence xmlns="urn:ietf:params:xml:ns:pidf"
> xmlns:dm="urn:ietf:params:xml:ns:pidf:data-model"
> xmlns:rpid="urn:ietf:params:xml:ns:pidf:rpid" entity="Pali
> <sip:{MY_SIP_URI}>">
> > >         <tuple id="sg89ae">
> > >         <status><basic>open</basic></status>
> > >         <contact priority="0.8">Pali <sip:{MY_SIP_URI}></contact>
> > >         </tuple>
> > >
> > >           <tuple xmlns="urn:ietf:params:xml:ns:pidf" id="TA0C538B2">
> > >             <status>
> > >               <basic>closed</basic>
> > >             </status>
> > >             <contact priority="1">sip:{MY_SIP_URI}</contact>
> > >             <timestamp>2019-04-19T17:20:36+02:00</timestamp>
> > >           </tuple>
> > >         </presence>
> > >
> > > 17:22:58.151188 IP (tos 0x0, ttl 52, id 22949, offset 0, flags [none],
> proto UDP (17), length 373)
> > >     91.121.209.194.5060 > {MY_IPV4_ADDRESS}.5060: [udp sum ok] SIP,
> length: 345
> > >         SIP/2.0 400 Bad Contact Header
> > >         Via: SIP/2.0/UDP
> {MY_IPV4_ADDRESS};branch=z9hG4bK2b55.88f93c20000000000000000000000000.0;rport=5060
> > >         From:
> <sip:{MY_SIP_URI}>;tag=97d8e785fdf42bf9622a64c13c504961-2708
> > >         To: <sip:{REMOTE_NAME}@sip.linphone.org>;tag=75559182
> > >         Call-ID: 26cf9d5c019af2dc3302b770887bcc2e at 0:0:0:0:0:0:0:0
> > >         CSeq: 2 NOTIFY
> > >         Content-Length: 0
> > >
> > >
>
> --
> Pali Rohár
> pali.rohar at gmail.com
>
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