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Not working with IPv6 destination address: too many colons in address #37

Description

@recolic

I tried to tcping 2603:1040:401:5::1a, tried the following syntax:

./tcping [2603:1040:401:5::1a]
./tcping [2603:1040:401:5::1a] 9201
./tcping 2603:1040:401:5::1a

None of them worked. Log:

PC➜  tcping git:(master) ./tcping [2603:1040:401:5::1a]
Ping tcp://2603:1040:401:5::1a:80() Failed(dial tcp: address 2603:1040:401:5::1a:80: too many colons in address) - time=13.49µs dns=0s
Ping tcp://2603:1040:401:5::1a:80() Failed(dial tcp: address 2603:1040:401:5::1a:80: too many colons in address) - time=6.51µs dns=0s
^C
Ping statistics tcp://2603:1040:401:5::1a:80
	2 probes sent.
	0 successful, 2 failed.
Approximate trip times:
	Minimum = 6.51µs, Maximum = 13.49µs, Average = 10µs⏎

PC➜  tcping git:(master) ./tcping [2603:1040:401:5::1a] 9201
Ping tcp://2603:1040:401:5::1a:9201() Failed(dial tcp: address 2603:1040:401:5::1a:9201: too many colons in address) - time=10.37µs dns=0s
Ping tcp://2603:1040:401:5::1a:9201() Failed(dial tcp: address 2603:1040:401:5::1a:9201: too many colons in address) - time=6.37µs dns=0s
Ping tcp://2603:1040:401:5::1a:9201() Failed(dial tcp: address 2603:1040:401:5::1a:9201: too many colons in address) - time=5.81µs dns=0s
Ping tcp://2603:1040:401:5::1a:9201() Failed(dial tcp: address 2603:1040:401:5::1a:9201: too many colons in address) - time=6.56µs dns=0s

Ping statistics tcp://2603:1040:401:5::1a:9201
	4 probes sent.
	0 successful, 4 failed.
Approximate trip times:
	Minimum = 5.81µs, Maximum = 10.37µs, Average = 7.277µs⏎ 

PC➜  tcping git:(master) ./tcping 2603:1040:401:5::1a
2603:1040:401:5::1a is an invalid target.

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