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net: lwm2m: report attributes on discover op

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Since we've added storing notification attributes written by server.
We can now append these attributes as part of link-format for discover
op.

Signed-off-by: Robert Chou <robert.ch.chou@acer.com>
This commit is contained in:
Robert Chou 2017-11-28 11:51:36 +08:00 • committed by Anas Nashif
commit b0e7a039ee
1 changed files with 58 additions and 3 deletions
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61
subsys/net/lib/lwm2m/lwm2m_engine.c
View file

@ -2601,6 +2601,38 @@ static int do_read_op(struct lwm2m_engine_obj *obj,
return ret;
}
static int print_attr(struct net_pkt *pkt, char *buf, u16_t buflen,
sys_slist_t *attr_list)
{
struct lwm2m_attr *attr;
int used, base;
u8_t digit;
s32_t fraction;
SYS_SLIST_FOR_EACH_CONTAINER(attr_list, attr, node) {
/* assuming integer will have float_val.val2 set as 0 */
used = snprintk(buf, buflen, ";%s=%d%s",
LWM2M_ATTR_STR[attr->type],
attr->float_val.val1,
attr->float_val.val2 > 0 ? "." : "");
base = 100000;
fraction = attr->float_val.val2;
while (fraction && used < buflen && base > 0) {
digit = fraction / base;
buf[used++] = '0' + digit;
fraction -= digit * base;
base /= 10;
}
if (!net_pkt_append_all(pkt, used, buf, BUF_ALLOC_TIMEOUT)) {
return -ENOMEM;
}
}
return 0;
}
static int do_discover_op(struct lwm2m_engine_context *context, bool well_known)
{
static char disc_buf[24];
@ -2680,7 +2712,6 @@ static int do_discover_op(struct lwm2m_engine_context *context, bool well_known)
}
if (path->level == 1) {
/* TODO: report object attrs (5.4.2) */
snprintk(disc_buf, sizeof(disc_buf), "%s</%u>",
reported ? "," : "",
obj_inst->obj->obj_id);
@ -2690,6 +2721,14 @@ static int do_discover_op(struct lwm2m_engine_context *context, bool well_known)
return -ENOMEM;
}
/* report object attrs (5.4.2) */
ret = print_attr(out->out_cpkt->pkt,
disc_buf, sizeof(disc_buf),
&obj_inst->obj->attr_list);
if (ret < 0) {
return ret;
}
reported = true;
}
@ -2700,7 +2739,6 @@ static int do_discover_op(struct lwm2m_engine_context *context, bool well_known)
}
if (path->level == 2) {
/* TODO: report object instance attrs (5.4.2) */
snprintk(disc_buf, sizeof(disc_buf), "%s</%u/%u>",
reported ? "," : "",
obj_inst->obj->obj_id, obj_inst->obj_inst_id);
@ -2710,6 +2748,14 @@ static int do_discover_op(struct lwm2m_engine_context *context, bool well_known)
return -ENOMEM;
}
/* report object instance attrs (5.4.2) */
ret = print_attr(out->out_cpkt->pkt,
disc_buf, sizeof(disc_buf),
&obj_inst->attr_list);
if (ret < 0) {
return ret;
}
reported = true;
}
@ -2720,7 +2766,6 @@ static int do_discover_op(struct lwm2m_engine_context *context, bool well_known)
continue;
}
/* TODO: report resource attrs when path > 1 (5.4.2) */
snprintk(disc_buf, sizeof(disc_buf),
"%s</%u/%u/%u>",
reported ? "," : "",
@ -2733,6 +2778,16 @@ static int do_discover_op(struct lwm2m_engine_context *context, bool well_known)
return -ENOMEM;
}
/* report resource attrs when path > 1 (5.4.2) */
if (path->level > 1) {
ret = print_attr(out->out_cpkt->pkt,
disc_buf, sizeof(disc_buf),
&obj_inst->resources[i].attr_list);
if (ret < 0) {
return ret;
}
}
reported = true;
}
}