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net: lwm2m: fix senml cbor object link encoding

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use text format instead of tlv format

Signed-off-by: Pascal Brogle <pascal.brogle@husqvarnagroup.com>
This commit is contained in:
Pascal Brogle 2022-11-24 14:38:04 +01:00 • committed by Carles Cufí
commit 60bf310aae
2 changed files with 57 additions and 12 deletions
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44
subsys/net/lib/lwm2m/lwm2m_rw_senml_cbor.c
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@ -46,6 +46,13 @@ struct cbor_out_fmt_data {
/* Basetime for Cached data timestamp */
time_t basetime;
/* Storage for object links */
struct {
char objlnk[CONFIG_LWM2M_RW_SENML_CBOR_RECORDS][sizeof("65535:65535")];
size_t objlnk_sz; /* Object link buff size */
uint8_t objlnk_cnt;
};
};
struct cbor_in_fmt_data {
@ -88,6 +95,7 @@ static void setup_out_fmt_data(struct lwm2m_message *msg)
engine_set_out_user_data(&msg->out, fd);
fd->name_sz = sizeof("/65535/999/");
fd->basetime = 0;
fd->objlnk_sz = sizeof("65535:65535");
}
static void clear_out_fmt_data(struct lwm2m_message *msg)
@ -117,6 +125,7 @@ static void clear_in_fmt_data(struct lwm2m_message *msg)
static int fmt_range_check(struct cbor_out_fmt_data *fd)
{
if (fd->name_cnt >= CONFIG_LWM2M_RW_SENML_CBOR_RECORDS ||
fd->objlnk_cnt >= CONFIG_LWM2M_RW_SENML_CBOR_RECORDS ||
fd->input._lwm2m_senml__record_count >= CONFIG_LWM2M_RW_SENML_CBOR_RECORDS) {
LOG_ERR("CONFIG_LWM2M_RW_SENML_CBOR_RECORDS too small");
return -ENOMEM;
@ -482,9 +491,40 @@ static int put_opaque(struct lwm2m_output_context *out, struct lwm2m_obj_path *p
static int put_objlnk(struct lwm2m_output_context *out, struct lwm2m_obj_path *path,
struct lwm2m_objlnk *value)
{
int32_t value_s32 = (value->obj_id << 16) | value->obj_inst;
int ret = 0;
struct cbor_out_fmt_data *fd = LWM2M_OFD_CBOR(out);
return put_s32(out, path, value_s32);
ret = fmt_range_check(fd);
if (ret < 0) {
return ret;
}
/* Format object link */
int objlnk_idx = fd->objlnk_cnt;
char *objlink_buf = fd->objlnk[objlnk_idx];
int objlnk_len =
snprintk(objlink_buf, fd->objlnk_sz, "%u:%u", value->obj_id, value->obj_inst);
if (objlnk_len < 0) {
return -EINVAL;
}
ret = put_name_nth_ri(out, path);
if (ret < 0) {
return ret;
}
struct record *record = CONSUME_CBOR_FD_REC(LWM2M_OFD_CBOR(out));
/* Write the value */
record->_record_union._record_union_choice = _union_vlo;
record->_record_union._union_vlo.value = objlink_buf;
record->_record_union._union_vlo.len = objlnk_len;
record->_record_union_present = 1;
fd->objlnk_cnt++;
return 0;
}
static int get_opaque(struct lwm2m_input_context *in,