r0 = socket$inet_tcp(0x2, 0x1, 0x0)
setsockopt$inet_tcp_TCP_MD5SIG(r0, 0x6, 0x19, &(0x7f00000000c0)={@in6={{0xa, 0x0, 0x0, @mcast1}}, 0x0, 0x0, 0x0, 0x0, "d7c86d3f5a115c5d2a46100b397204a1ddfd053a2cb188ad977dbdd4fb44e392d4233cffc2568852a8febf9fe5f69659d7ea13e7d7948042834527679e110a9cd3f3fd08005d0241ad5b73bbc26a00"}, 0xd8)