shared/gatt-server: Add support for long write

System Internals / BlueZ - Łukasz Rymanowski [codecoup.pl] - 4 April 2016 08:15 UTC

With this patch long write and nested long write reliable is supported. GATT server is responsible now to do aggregation of prep write data for long write session. Note: We consider long write as the consequtive prepare writes with continues offsets.

E.g. 1

prep_write: handle 1, offset 0, value_len 10 prep_write: handle 1, offset 10, value_len 10 prep_write: handle 2, offset 0, value_len 10 prep_write: handle 2, offset 10, value_len 10

Will result with following calles to app:

exec_write: handle 1: offset 0, value_len 20 exec_write: handle 2: offset 0, value_len 20

E.g. 2

prep_write: handle 1, offset 0, value_len 10 prep_write: handle 1, offset 2, value_len 5 prep_write: handle 2, offset 0, value_len 10 prep_write: handle 2, offset 4, value_len 5

Will result with following calles to app:

exec_write: handle 1: offset 0, value_len 10 exec_write: handle 1: offset 2, value_len 5 exec_write: handle 2: offset 0, value_len 10 exec_write: handle 2: offset 4, value_len 5

E.g. 3 prep_write: handle 1, offset 0, value_len 10 prep_write: handle 1, offset 5, value_len 5 prep_write: handle 1, offset 10, value_len 6

will result with following calles to app:

exec_write: handle 1, offset 0, value 10 exec_write: handle 1, offset 5, value 11

55bcfbc shared/gatt-server: Add support for long write
src/shared/gatt-server.c | 87 +++++++++++++++++++++++++++++++++++-----------
1 file changed, 67 insertions(+), 20 deletions(-)

Upstream: git.kernel.org

  • Share