gping hangs when trying to ping an ipv6 address

[Chaz6]

gping 127.0.0.1 works as expected, but gping ::1 just gives a blank screen.

[orf]

Ah. Yeah. The regex used to parse the output from ping only handles ipv4 addresses.

I’ll update it

[orf]

Ahh, right. So we need to invoke ping6 instead of ping for ipv6 addresses. This complicates things, let me have a think of the best way to do this.

[passcod]

Linux ping6 is the same thing as ping since ~2015 or so, though that may be dependent on packaging (because of course).

[orf]

Hey, can either of you run ping ::1 and send me some lines of output here?

[Revertron]

From Windows 10:

Pinging ::1 with 32 bytes of data:
Reply from ::1: time<1ms
Reply from ::1: time<1ms
Reply from ::1: time<1ms
Reply from ::1: time<1ms

Ping statistics for ::1:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 0ms, Average = 0ms

From Debian 10:

PING ::1(::1) 56 data bytes
64 bytes from ::1: icmp_seq=1 ttl=64 time=0.054 ms
64 bytes from ::1: icmp_seq=2 ttl=64 time=0.081 ms
64 bytes from ::1: icmp_seq=3 ttl=64 time=0.054 ms
64 bytes from ::1: icmp_seq=4 ttl=64 time=0.102 ms
64 bytes from ::1: icmp_seq=5 ttl=64 time=0.060 ms
^C
--- ::1 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 100ms
rtt min/avg/max/mdev = 0.054/0.070/0.102/0.019 ms

[SOF3]

gping ::1 seems to work for me. Has this issue been fixed or what?

Version info:

gping 1.2.0 from crates.io
Linux 5.8.0-44-generic
Ubuntu 20.04.2

ip a output:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever

[psiman-wandera]

Hi all, I've tried this on macOs and it doesn't seem to work either.

gping 1.2.1

It just hangs.

ping and ping6 commands output:

ping ::1
ping: cannot resolve ::1: Unknown host

ping6 ::1
PING6(56=40+8+8 bytes) ::1 --> ::1
16 bytes from ::1, icmp_seq=0 hlim=64 time=0.098 ms
^C
--- ::1 ping6 statistics ---
1 packets transmitted, 1 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 0.098/0.098/0.098/0.000 ms

Also: I am not if this is related. But for some domains gping -6 HOSTNAME works and for some (resolvable to IPv6 address only) it hangs.