The success or not of a scan command is found from the message directly.
There's no need to look for any attribute from the scan netlink answer.
The message is an error message or not, and that tells if the scan has
been started or not.
Modifying a bit how networks are stored inside the hashtable:
1 - instead of the network id, the network's object path is used
2 - network holds the pointer of the object path
3 - the hashtable does not free the key (network_free() will)
This permits to optimize on:
1 - one memory allocation used for 2 distinct things
2 - remove the need to re-compute the object path (and the id) when it's
needed, it can use dircetly the one stored in the network structure.
Support arbitrarily long bitfields by providing field and mask values
as arrays with their length measured in bytes. Some of the IE fields
easily reach 80 bits or more, thus easily overrunning any integer sizes
used by the OS architecture.
Request a passphrase via Agent if none is set at the time network is
being connected. When freeing a network, cancel any outstanding Agent
requests and free allocated memory.
l_genl_family_send only returns request id. If request
failed at low level, current implementation does not handle that.
In case of request failure clear pending dbus messages.
If flags was 0, then an uninitialized buffer was printed. Changed
this so that if flags == 0, then just the value is printed.
If flags != 0, then print flags values to a buffer that is big
enough to hold all the sub-strings.
Open networks do not contain a RSN element, so storing a 256 byte buffer
was too expensive.
This patch also has the side-effect of fixing detection of Open
Networks. Prior to this, if the scan results did not contain an RSN IE,
the 'rsne' variable would be set to all zeros. scan_get_ssid_security
would then be called, but instead of a NULL struct ie_rsn_info, a
non-null, but zerod out ie_rsn_info would be passed in. This caused the
code to work, but for the wrong reasons.
The buffer that is allocated for the filename is too short and
as sprintf() was used it overflowed the buffer easily when longer
interface name was used.
Instead of mallocing the ssid buffer, use a static array. This removes an
extra couple of malloc/free operations and should result in less memory
utilization on average.
