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net: lwm2m: setup data_ptr/len for OPAQUE resource when none given

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OPAQUE resource type might/might not have data_ptr/data_len setup
depending on the implementation. This introduce an issue that when
OPAQUE resource is written from the server side, the ones w/ none
setup will not be able to get the data at post_write_cb()

Modify to setup data_ptr/data_len as incoming buffer and buffer size

Signed-off-by: Robert Chou <robert.ch.chou@acer.com>
This commit is contained in:
Robert Chou 2017-08-23 10:37:57 +08:00 • committed by Anas Nashif
commit f6188fbce3
1 changed files with 7 additions and 0 deletions
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7
subsys/net/lib/lwm2m/lwm2m_engine.c
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@ -1707,6 +1707,13 @@ int lwm2m_write_handler(struct lwm2m_engine_obj_inst *obj_inst,
data_ptr = res->data_ptr;
data_len = res->data_len;
/* setup data_ptr/data_len for OPAQUE when it has none setup */
if (obj_field->data_type == LWM2M_RES_TYPE_OPAQUE &&
data_ptr == NULL && data_len == 0) {
data_ptr = in->inbuf;
data_len = in->insize;
}
/* allow user to override data elements via callback */
if (res->pre_write_cb) {
data_ptr = res->pre_write_cb(obj_inst->obj_inst_id, &data_len);