[iscsictl] connection to invalid target

[RA H]

I have a SAN with four iSCSI targets,
eui.000B56007135B1B0 through eui.000B56007135B1B3

I need to validate target names entered manually by a user.
Normally, I would do this is by searching the output of a discovery
session. Since iscsictl doesn't allow doing discovery *only*, the only
way I can think of to validate a target is to connect, then parse the
output of "iscsictl -L". Unfortunately, attempting to connect to certain
invalid targets results in connection to a valid target:

# iscsictl -Ad 192.168.3.111
# iscsictl -L
Target name                          Target portal    State
eui.000B56007135B1B0                 192.168.3.111    Connected: da0
eui.000B56007135B1B1                 192.168.3.111    Connected: da2
eui.000B56007135B1B2                 192.168.3.111    Connected: da1
eui.000B56007135B1B3                 192.168.3.111    Connected: da3
# iscsictl -Ra
# iscsictl -A -p 192.168.3.111 -t eui.000B56007135B1A1
# iscsictl -L
Target name                          Target portal    State
eui.000B56007135B1A1                 192.168.3.111    Connected: da0
# dmesg
...
da0: Serial Number 000B56007135B1B10000
...

As the Serial Number indicates, iscsictl actually connected to
target eui.000B56007135B1B1.