The first byte of the PDU is the SMSC length, but it's not
the padded SMSC length. So we need to subtract the actual
byte index of the start of the message from length of the
PDU, and since the PDU creation function knows all about
where the SMSC address stops and the message begins, just
have it return that length instead of making the callers
calculate it.
There's no encoding information about 8-bit SMS messages,
and they are often binary things like ringtones or voicemail
indicator commands. Since there's no point to our parsing
them just let clients deal with it.
Keep a local cache of SMS message fragments when we perform a List or
Get command on the modem; use this cache to reassemble fragments into
complete messages, which are then what is returned by the Get and List
DBus commands. Similarly, cause Delete to delete all known parts of a
multipart message.
While here, remove some extra whitespace in the SMS commands we send
to the modem.
When receiving a SMS message with raw 8-bit data, sanitize it by
replacing non-ASCII characters with \xNN escape sequences. This
prevents a problem further down the line where the body of the message
is passed into DBus as a string, and DBus requires strings to be UTF-8.
BUG=chrome-os-partner:5953
TEST=Run network_ModemManagerSMS.py with the PDU from this bug.
Change-Id: Ic33a365f9a065c49a325e047e4c3f5e81450fa1f
Reviewed-on: http://gerrit.chromium.org/gerrit/8232
Reviewed-by: Eric Shienbrood <ers@chromium.org>
Tested-by: Nathan J. Williams <njw@chromium.org>
Commit-Ready: Nathan J. Williams <njw@chromium.org>
Fourth and final in a series.
This fixes an off-by-one (septet) error in the calculation of the
amount of data to skip in the presence of a user data header, and adds
the test case from the wild that triggered it.
