Re: [Linphone-users] Free linphone.org SIP service not working?

[Ed Hynan]

On Wed, 18 Jul 2018, Martin Glaser wrote:

> Hello again,
>
> also in my Asterisk configuration is neither a reference to sip3.linphone.org 
> nor to 37.59.51.72.
>
> That here is all:
>
> register => tls://...:address@hidden/...
>
> and
>
> [sip.linphone.org]
> type=peer
> host=sip.linphone.org
> remotesecret=...
> defaultuser=...
> context=public
>
> If I check DNS SRV records, I see:
>
> pips:~ martin$ dig -t SRV _sip._udp.sip.linphone.org
[snip]

Well, that is interesting.  In my queries, I left out the sip. host,
as in *.linphone.org; your queries include sip. as in *.sip.linphone.org.

Both SRV type queries received answers, and the answers are different.
In queries like _sip._udp.linphone.org, only 1 answer is given, and
it includes sip.linphone.org.

I wonder why these two queries should both receive answers, especially
answers that differ.  A good reason, or error?

I don't know if asterisk[*] is actually doing SRV queries in the form
you used, but if so I would expect it to try sip1 if sip3 is
unreachable.

I suppose I'll keep sip3.linphone.org in my /etc/hosts as a workaround
until linphone folks sort it out.

[*] meaning asterisk chan_sip module.

-Ed Hynan

p.s.

% for H in {_sips._tcp,_sip.{_tcp,_udp}}{.sip,}.linphone.org; do echo ==$H==; 
dig $H SRV; done
==_sips._tcp.sip.linphone.org==

; <<>> DiG 9.10.4-P8 <<>> _sips._tcp.sip.linphone.org SRV
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45246
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;_sips._tcp.sip.linphone.org.   IN      SRV

;; ANSWER SECTION:
_sips._tcp.sip.linphone.org. 1614 IN    SRV     0 100 5223 sip3.linphone.org.
_sips._tcp.sip.linphone.org. 1614 IN    SRV     10 100 5223 sip1.linphone.org.
_sips._tcp.sip.linphone.org. 1614 IN    SRV     20 100 443 sip3.linphone.org.

;; Query time: 1 msec
;; SERVER: 192.168.1.221#53(192.168.1.221)
;; WHEN: Wed Jul 18 10:35:44 EDT 2018
;; MSG SIZE  rcvd: 167

==_sips._tcp.linphone.org==

; <<>> DiG 9.10.4-P8 <<>> _sips._tcp.linphone.org SRV
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29168
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;_sips._tcp.linphone.org.       IN      SRV

;; ANSWER SECTION:
_sips._tcp.linphone.org. 9164   IN      SRV     0 0 5061 sip.linphone.org.

;; Query time: 1 msec
;; SERVER: 192.168.1.221#53(192.168.1.221)
;; WHEN: Wed Jul 18 10:35:44 EDT 2018
;; MSG SIZE  rcvd: 88

==_sip._tcp.sip.linphone.org==

; <<>> DiG 9.10.4-P8 <<>> _sip._tcp.sip.linphone.org SRV
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 13653
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;_sip._tcp.sip.linphone.org.    IN      SRV

;; ANSWER SECTION:
_sip._tcp.sip.linphone.org. 2299 IN     SRV     10 100 5228 sip1.linphone.org.
_sip._tcp.sip.linphone.org. 2299 IN     SRV     0 100 5228 sip3.linphone.org.

;; Query time: 1 msec
;; SERVER: 192.168.1.221#53(192.168.1.221)
;; WHEN: Wed Jul 18 10:35:44 EDT 2018
;; MSG SIZE  rcvd: 129

==_sip._tcp.linphone.org==

; <<>> DiG 9.10.4-P8 <<>> _sip._tcp.linphone.org SRV
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 17347
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;_sip._tcp.linphone.org.                IN      SRV

;; ANSWER SECTION:
_sip._tcp.linphone.org. 9199    IN      SRV     0 0 5060 sip.linphone.org.

;; Query time: 1 msec
;; SERVER: 192.168.1.221#53(192.168.1.221)
;; WHEN: Wed Jul 18 10:35:44 EDT 2018
;; MSG SIZE  rcvd: 87

==_sip._udp.sip.linphone.org==

; <<>> DiG 9.10.4-P8 <<>> _sip._udp.sip.linphone.org SRV
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45686
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;_sip._udp.sip.linphone.org.    IN      SRV

;; ANSWER SECTION:
_sip._udp.sip.linphone.org. 1825 IN     SRV     0 100 5060 sip3.linphone.org.
_sip._udp.sip.linphone.org. 1825 IN     SRV     10 100 5060 sip1.linphone.org.

;; Query time: 1 msec
;; SERVER: 192.168.1.221#53(192.168.1.221)
;; WHEN: Wed Jul 18 10:35:44 EDT 2018
;; MSG SIZE  rcvd: 129

==_sip._udp.linphone.org==

; <<>> DiG 9.10.4-P8 <<>> _sip._udp.linphone.org SRV
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11539
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;_sip._udp.linphone.org.                IN      SRV

;; ANSWER SECTION:
_sip._udp.linphone.org. 9218    IN      SRV     0 0 5060 sip.linphone.org.

;; Query time: 1 msec
;; SERVER: 192.168.1.221#53(192.168.1.221)
;; WHEN: Wed Jul 18 10:35:44 EDT 2018
;; MSG SIZE  rcvd: 87