Re: [sr-dev] dns resolver issue (RFC3263)

Indeed, this is not implemented correctly. If you fix it, the question is: what should be used if there are SRV records for UDP and TCP? AFAIK there is already a configuration option to choose the respective NAPTR records according to local priority. These config options could be reused. See dns_udp_pref/dns_tcp_pref/... options in doc/dns.txt regards Klaus On 29.10.2012 16:33, MÉSZÁROS Mihály wrote: > Hi All, > > I am experiencing an issue when i try to contact xy(a)cisco.com. > I found that kamailio/sip-router can't resolve by default resolving way > a TCP + SRV records from domain cisco.com. > > e.g. cisco.com > > misi@alma:~$ host -t NAPTR cisco.com > cisco.com has no NAPTR record > misi@alma:~$ host -t SRV _sip._udp.cisco.com > Host _sip._udp.cisco.com not found: 3(NXDOMAIN) > misi@alma:~$ host -t SRV _sip._tcp.cisco.com > _sip._tcp.cisco.com has SRV record 1 0 5060 vcsgw.cisco.com. > misi@alma:~$ host -t SRV _sips._tcp.cisco.com > _sips._tcp.cisco.com has SRV record 1 0 5061 vcsgw.cisco.com. > > > I can't call xy(a)cisco.com because it does not exists an NAPTR record in > domain cisco.com, > and furthermore no SRV with udp. > > But it exists sip+tcp record > and also exists an secure sip SRV, so sips+tcp record! > > I read rfc3263 > I find kamailio dns resolver is not working as it should according > RFC3263. > > http://tools.ietf.org/html/rfc3263 > > _If no NAPTR records are found, the client constructs SRV queries > for those transport protocols it supports, and does a query for > each._ > > > So kamailio should query all (udp, tcp, tls, sctp whatever) protocols. > > Can anyone help/guide me to create a fix to this issue? > My plan is to create a patch to kamailio resolver, to correct and behave > according RFC3263. > > Any help or guidance appreciated! > > Thanks, > Misi > > > > > > > _______________________________________________ > sr-dev mailing list > sr-dev(a)lists.sip-router.org > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev >