static int prv_getId(uint8_t * data,
uint16_t length,
uint16_t * objId,
uint16_t * instanceId)
{
int value;
uint16_t limit;
uint16_t end;
// Expecting application/link-format (RFC6690)
// leading space were removed before. Remove trailing spaces.
while (length > 0 && data[length-1] == ' ') length--;
// strip open and close tags
if (length >= 1 && data[0] == REG_URI_START && data[length-1] == REG_URI_END)
{
data += 1;
length -= 2;
}
else
{
return 0;
}
// If there is a preceding /, remove it
if (length >= 1 && data[0] == '/')
{
data += 1;
length -= 1;
}
limit = 0;
while (limit < length && data[limit] != '/') limit++;
value = prv_get_number(data, limit);
if (value < 0 || value >= LWM2M_MAX_ID) return 0;
*objId = value;
if (limit < length)
{
limit += 1;
data += limit;
length -= limit;
if (length > 0)
{
value = prv_get_number(data, length);
if (value >= 0 && value < LWM2M_MAX_ID)
{
*instanceId = value;
return 2;
}
else
{
return 0;
}
}
}
return 1;
}
static int prv_getId(uint8_t * data,
uint16_t length,
uint16_t * objId,
uint16_t * instanceId)
{
int value;
uint16_t limit;
uint16_t end;
limit = 0;
while (limit < length && data[limit] != '/' && data[limit] != ' ') limit++;
value = prv_get_number(data, limit);
if (value < 0 || value >= LWM2M_MAX_ID) return 0;
*objId = value;
if (limit != length)
{
limit += 1;
end = limit;
while (end < length && data[end] != ' ') end++;
if (end != limit)
{
value = prv_get_number(data + limit, end - limit);
if (value >= 0 && value < LWM2M_MAX_ID)
{
*instanceId = value;
return 2;
}
}
}
return 1;
}
static int prv_getId(uint8_t * data,
uint16_t length,
uint16_t * objId,
uint16_t * instanceId)
{
int value;
uint16_t limit;
uint16_t end;
// Expecting application/link-format (RFC6690)
// strip open and close tags
if (length >= 1 && data[0] == '<' && data[length-1] == '>')
{
data++;
length-=2;
}
else
{
return 0;
}
// If there is a preceding /, remove it
if (length >= 1 && data[0] == '/')
{
data++;
length-=1;
}
limit = 0;
while (limit < length && data[limit] != '/' && data[limit] != ' ') limit++;
value = prv_get_number(data, limit);
if (value < 0 || value >= LWM2M_MAX_ID) return 0;
*objId = value;
if (limit != length)
{
limit += 1;
end = limit;
while (end < length && data[end] != ' ') end++;
if (end != limit)
{
value = prv_get_number(data + limit, end - limit);
if (value >= 0 && value < LWM2M_MAX_ID)
{
*instanceId = value;
return 2;
}
}
}
return 1;
}
lwm2m_uri_t * lwm2m_decode_uri(multi_option_t *uriPath)
{
lwm2m_uri_t * uriP;
int readNum;
if (NULL == uriPath) return NULL;
uriP = (lwm2m_uri_t *)lwm2m_malloc(sizeof(lwm2m_uri_t));
if (NULL == uriP) return NULL;
memset(uriP, 0, sizeof(lwm2m_uri_t));
// Read object ID
if (URI_REGISTRATION_SEGMENT_LEN == uriPath->len
&& 0 == strncmp(URI_REGISTRATION_SEGMENT, uriPath->data, uriPath->len))
{
uriP->flag |= LWM2M_URI_FLAG_REGISTRATION;
uriPath = uriPath->next;
if (uriPath == NULL) return uriP;
}
else if (URI_BOOTSTRAP_SEGMENT_LEN == uriPath->len
&& 0 == strncmp(URI_BOOTSTRAP_SEGMENT, uriPath->data, uriPath->len))
{
uriP->flag |= LWM2M_URI_FLAG_BOOTSTRAP;
uriPath = uriPath->next;
if (uriPath != NULL) goto error;
return uriP;
}
readNum = prv_get_number(uriPath->data, uriPath->len);
if (readNum < 0 || readNum > LWM2M_MAX_ID) goto error;
uriP->objectId = (uint16_t)readNum;
uriP->flag |= LWM2M_URI_FLAG_OBJECT_ID;
uriPath = uriPath->next;
if ((uriP->flag & LWM2M_URI_MASK_TYPE) == LWM2M_URI_FLAG_REGISTRATION)
{
if (uriPath != NULL) goto error;
return uriP;
}
uriP->flag |= LWM2M_URI_FLAG_DM;
if (uriPath == NULL) return uriP;
// Read object instance
if (uriPath->len != 0)
{
readNum = prv_get_number(uriPath->data, uriPath->len);
if (readNum < 0 || readNum >= LWM2M_MAX_ID) goto error;
uriP->instanceId = (uint16_t)readNum;
uriP->flag |= LWM2M_URI_FLAG_INSTANCE_ID;
}
uriPath = uriPath->next;
if (uriPath == NULL) return uriP;
// Read ressource ID
if (uriPath->len != 0)
{
readNum = prv_get_number(uriPath->data, uriPath->len);
if (readNum < 0 || readNum > LWM2M_MAX_ID) goto error;
uriP->resourceId = (uint16_t)readNum;
uriP->flag |= LWM2M_URI_FLAG_RESOURCE_ID;
}
// must be the last segment
if (NULL == uriPath->next) return uriP;
error:
lwm2m_free(uriP);
return NULL;
}
lwm2m_uri_t * lwm2m_decode_uri(char * altPath,
multi_option_t *uriPath)
{
lwm2m_uri_t * uriP;
int readNum;
uriP = (lwm2m_uri_t *)lwm2m_malloc(sizeof(lwm2m_uri_t));
if (NULL == uriP) return NULL;
memset(uriP, 0, sizeof(lwm2m_uri_t));
// Read object ID
if (NULL != uriPath
&& URI_REGISTRATION_SEGMENT_LEN == uriPath->len
&& 0 == strncmp(URI_REGISTRATION_SEGMENT, (char *)uriPath->data, uriPath->len))
{
uriP->flag |= LWM2M_URI_FLAG_REGISTRATION;
uriPath = uriPath->next;
if (uriPath == NULL) return uriP;
}
else if (NULL != uriPath
&& URI_BOOTSTRAP_SEGMENT_LEN == uriPath->len
&& 0 == strncmp(URI_BOOTSTRAP_SEGMENT, (char *)uriPath->data, uriPath->len))
{
uriP->flag |= LWM2M_URI_FLAG_BOOTSTRAP;
uriPath = uriPath->next;
if (uriPath != NULL) goto error;
return uriP;
}
if ((uriP->flag & LWM2M_URI_MASK_TYPE) != LWM2M_URI_FLAG_REGISTRATION)
{
// Read altPath if any
if (altPath != NULL)
{
int i;
if (NULL == uriPath)
{
lwm2m_free(uriP);
return NULL;
}
for (i = 0 ; i < uriPath->len ; i++)
{
if (uriPath->data[i] != altPath[i+1])
{
lwm2m_free(uriP);
return NULL;
}
}
uriPath = uriPath->next;
}
if (NULL == uriPath || uriPath->len == 0)
{
uriP->flag |= LWM2M_URI_FLAG_DELETE_ALL;
return uriP;
}
}
readNum = prv_get_number(uriPath->data, uriPath->len);
if (readNum < 0 || readNum > LWM2M_MAX_ID) goto error;
uriP->objectId = (uint16_t)readNum;
uriP->flag |= LWM2M_URI_FLAG_OBJECT_ID;
uriPath = uriPath->next;
if ((uriP->flag & LWM2M_URI_MASK_TYPE) == LWM2M_URI_FLAG_REGISTRATION)
{
if (uriPath != NULL) goto error;
return uriP;
}
uriP->flag |= LWM2M_URI_FLAG_DM;
if (uriPath == NULL) return uriP;
// Read object instance
if (uriPath->len != 0)
{
readNum = prv_get_number(uriPath->data, uriPath->len);
if (readNum < 0 || readNum >= LWM2M_MAX_ID) goto error;
uriP->instanceId = (uint16_t)readNum;
uriP->flag |= LWM2M_URI_FLAG_INSTANCE_ID;
}
uriPath = uriPath->next;
if (uriPath == NULL) return uriP;
// Read resource ID
if (uriPath->len != 0)
{
// resource ID without an instance ID is not allowed
if ((uriP->flag & LWM2M_URI_FLAG_INSTANCE_ID) == 0) goto error;
readNum = prv_get_number(uriPath->data, uriPath->len);
if (readNum < 0 || readNum > LWM2M_MAX_ID) goto error;
uriP->resourceId = (uint16_t)readNum;
uriP->flag |= LWM2M_URI_FLAG_RESOURCE_ID;
}
// must be the last segment
if (NULL == uriPath->next) return uriP;
error:
lwm2m_free(uriP);
return NULL;
}
