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Description of problem:


When trying to run sctp_test and connect to an endpoint
with an ipv6 address it fails

Version-Release number of selected component (if applicable):
lksctp-tools-1.0.10-7.el6 on RHEL 6.9 Beta

How reproducible:
100%

Steps to Reproduce:
1. Start server `/usr/bin/sctp_status -H localhost -P 2222 -l`
2. Start client `/usr/bin/sctp_test -H localhost -P 2223 -h localhost -p 2222 -s`

Actual results:

remote:addr=::, port=EtherNet/IP-1, family=10
local:addr=::, port=rockwell-csp2, family=10
seed = 1484030671

Starting tests...
	socket(SOCK_SEQPACKET, IPPROTO_SCTP)  ->  sk=3
	bind(sk=3, [a:::,p:rockwell-csp2])  --  attempt 1/10
Client: Sending packets.(1/10)
	sendmsg(sk=3, assoc=0)    1 bytes.
	  SNDRCV(stream=0 flags=0x1 ppid=1727240551

		*** sendmsg: Invalid argument ***


Expected results:

Test completes.

Additional info:

The above test will work if the command line is modified to

/usr/bin/sctp_test -H localhost -P 2223 -h 127.0.0.1 -p 2222 -s

to force sctp_test to connect via ipv4.

The issue is fixed in RHEL 7.3 but it exists in RHEL 6.9 beta.

https://bugzilla.redhat.com/show_bug.cgi?id=1400441#c3

As Xin said, this should be duplicate of bz1400441