This patch saves off the PSK generated based on the passphrase provided
by the agent/user. The PSK is saved only if the connection is
successful.
Subsequent connection attempts to the known AP use the PSK saved on the
filesystem (default /var/lib/iwd/<ssid>.psk). If the connection fails,
the agent will again be asked for the passphrase on the next attempt.
When printing New Address events, the extra_str buffer is overrun,
resulting in weird stuff happening.
> RTNL: Error (0x02) len 20 > 5.252075
Flags: 0 (0x000)
Sequence number: 189 (0x000000bd)
Port ID: 2116
ACK: 0
==4080== Invalid read of size 1
==4080== at 0x4E8000E: vfprintf (in /lib64/libc-2.20.so)
==4080== by 0x4EA8A24: vsnprintf (in /lib64/libc-2.20.so)
==4080== by 0x4E86011: snprintf (in /lib64/libc-2.20.so)
==4080== by 0x403B64: print_packet (nlmon.c:238)
==4080== by 0x40C8FD: print_nlmsghdr (nlmon.c:3197)
==4080== by 0x40CD9E: print_rtnl_msg (nlmon.c:3266)
==4080== by 0x40CE4F: nlmon_print_rtnl (nlmon.c:3298)
==4080== by 0x40D1CD: nlmon_receive (nlmon.c:3390)
CMD_DEAUTHENTICATE seems to carry only the management frame pdu
information. CMD_DISCONNECT is carrying the information that is
actually needed by us:
> Event: Disconnect (0x30) len 28 1140.118545
Wiphy: 0 (0x00000000)
Interface Index: 3 (0x00000003)
Reason Code: 2 (0x0002)
Disconnect by AP: true
We will ignore non-UTF8 based SSIDs. Support for non-UTF8 SSIDs seems
to be of dubious value in the real world as the vast majority of
consumer devices would not even allow such SSIDs to be configured or
used.
There also seems to be no compelling argument to support such SSIDs, so
until that argument arrives, non-UTF8 SSIDs will be filtered out. This
makes the D-Bus API and implementation much easier.
We start a timer. This handles the case that the Authenticator does
not send us the first message of the 4-way handshake, or disappears
before sending us the 3rd message.
We need to set the linkmode and operstate after successful
authentication.
Initial value for linkmode is 1 (user space controlled) and
IF_OPER_DORMANT for opermode. After successful authentication,
the operstate is set to IF_OPER_UP.
More specific details can be seen in kernel sources at
https://www.kernel.org/doc/Documentation/networking/operstates.txt
