Connection information section shows incorrect IP(v6) - NOT actual webserver

[vom513]

Affected Version:

2.0.2(73)

Is this a Test Flight version or the App Store version?

App Store

Device and iOS Version:

iPhone X - 13.3.1

What steps will reproduce the problem?

1. Enter "burn.net" into app.
2. Observe "connection information".

What is the expected output?

The IP address of burn.net: 2607:f2f8:a4c8::2

What do you see instead?

An IP address from the same prefix, but I have no idea what the specific host bits are corresponding to:

2607:f2f8:a4c8:0:8100:e32b:7d3a:b5a4

Please provide any additional information below.

Screenshot - https://imgur.com/a/pGbdXlS

[vom513]

Sorry for replying to myself, but I tried another site (arin.net). Similar behavior. Looks like the "connection information" has the first 4 hextets correct. After that it's "8100:e32b:7d3a:b5a4" again for me.

[ecnepsnai]

Hi @vom513 what crypto engine are you using (Look under Advanced Settings). Does this problem happen with both iOS and OpenSSL ?

[vom513]

It's currently set to iOS (I assume this is the default - I didn't set this).

Setting this to OpenSSL has the same behavior (I put it back in iOS after testing).

A couple more points:

• This also happens on my iPad (latest iPad OS).
• The "right side" of this address is different now. I still have the correct leading hextets. In the case of burn.net - this is 2607:f2f8:a4c8:0. I notice that this is exactly half the address.

[ecnepsnai]

I'm still looking into this. The logic used to get the servers IP address isn't complex so I'm not ruling out that this is potentially an iOS bug.

int sock_fd = <...> // Assume I already have the fd
struct sockaddr addr;
socklen_t addr_len = sizeof(addr);
getpeername(sock_fd, &addr, &addr_len);
char addressString[INET6_ADDRSTRLEN];
inet_ntop(AF_INET6, &((struct sockaddr_in6 *)&addr)->sin6_addr, addressString, INET6_ADDRSTRLEN);

[ecnepsnai]

Fix identified - will be included in next update.

[vom513]

Nice - appreciate the work on this.