[OpenSIPS-Users] nathelper function for ipv6

[Pasan Meemaduma]

Hi Bogdan,
I just tried, and it still returns true. I have put my debug line below,

Call: Request from NAT IP - From=xxx from_uri=sip:xxxxx at voip2.exetel.com.au Auth_user=xx Request=xx IP=2400:A240:0:1:6000:0:0:2 Via=2400:a240:0:1:6000::2 ID=545589626


Surprisingly I have another ipv6 address tested and it fails the nat test and behave appropriately. I'll dump both request contents as below,
not working one - nat_uac_test returns true

U 2018/04/05 15:06:20.982169 2400:a240:0:1:6000::2:5060 -> 240x:xx00:1d:f0::1:88:5060
INVITE sip:0x12345678 at xx.xx.com.xx SIP/2.0.
Via: SIP/2.0/UDP [2400:a240:0:1:6000::2]:5060;branch=z9hG4bK1610101366.Contact: <sip:0xx0x0x0xx@[2400:A240:0:1:6000:0:0:2]>.

working one - nat_uac_test returns false
 
U 2018/04/05 15:11:11.480156 2406:3400:0:8:c5c9:bd6:4b95:7a5e:5060 -> 240x:xx00:1d:f0::1:88:5060
INVITE sip:0x12345678 at xx.xx.com.xx SIP/2.0.
Via: SIP/2.0/UDP [240x:xx00:0:8:c5c9:bd6:4b95:7a5e]:5060;branch=z9hG4bK566727241.
Contact: <sip:0x80x0xxxx@[240x:xx00:0:8:C5C9:BD6:4B95:7A5E]>.

Only difference I can spot is the second ipv6 address is in fully stretch format and mine in summarize format as below, Not sure if its related. 


2400:a240:0:1:6000::2240x:xx00:0:8:c5c9:bd6:4b95:7a5e

Let me know if you need anything else.
    On Thursday, April 5, 2018, 3:37:24 PM GMT+5:30, Bogdan-Andrei Iancu <bogdan at opensips.org> wrote:  
 
  Hi Pasan,
 
 19 is 16 + 2 + 1 (as tests) :
 
 1 - Contact header field is searched for occurrence of RFC1918 / RFC6598 addresses.
 2 - the "received" test is used: address in Via is compared against source IP address of signaling
 16 - test if the source port is different from the port in Via 
 
 2 and 16 is checking IP versus IP, so they are not affected by v4 versus v6.
 
 On test 1 I see no checks on v4 or v6 - it simply checks the IP (as raw bytes) against the know ipv4 private classes.
 
 Could you try to remove the test 1 (use 18) and see if the test still returns true ?
 
 Regards,
  Bogdan-Andrei Iancu

OpenSIPS Founder and Developer
  http://www.opensips-solutions.com
OpenSIPS Summit 2018
  http://www.opensips.org/events/Summit-2018Amsterdam
 On 04/05/2018 06:58 AM, Pasan Meemaduma via Users wrote:
  
  Hi Guys, 
  Are nathelper module functions ipv6 safe ? I'm getting true for nat test with following call for an ipv6 address which is a globally unique unicast address. 
  nat_uac_test("19") 
 
   
  
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