[SR-Users] kamailio 4.4.4 fills IPv6 contact address when sending packet over IPv4
Pali Rohár
pali.rohar at gmail.com
Fri Jul 12 10:00:57 CEST 2019
My SIP client (really desktop linphone) sets IPv4 Contact address of my
internet connection. I looked at it.
And those packets are between my SIP server and remote sip.linphone.org
server. I have nothing with sip.linphone.org server. Really kamailio 4.4
sets IPv6 Contact address in that header for outgoing NOTIFY packets.
And it does *not* happen for INVITE or MESSAGE packets. Only for NOTIFY.
I really do not know why, therefore I'm asking.
On Thursday 11 July 2019 23:46:40 Brandon Armstead wrote:
> 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
> >
> > _______________________________________________
> > Kamailio (SER) - Users Mailing List
> > sr-users at lists.kamailio.org
> > https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
> >
--
Pali Rohár
pali.rohar at gmail.com
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