net/nanocoap: add generic uint block option

sys/include/net/nanocoap.h

@@ -1038,6 +1038,20 @@ static inline size_t coap_opt_put_block2(uint8_t *buf, uint16_t lastonum,
     return coap_opt_put_block(buf, lastonum, slicer, more, COAP_OPT_BLOCK2);
 }
 
+/**
+ * @brief   Encode the given uint option into buffer
+ *
+ * @param[out]  buf         buffer to write to
+ * @param[in]   lastonum    number of previous option (for delta calculation),
+ *                          or 0 for first option
+ * @param[in]   onum        number of option
+ * @param[in]   value       value to encode
+ *
+ * @returns     amount of bytes written to @p buf
+ */
+size_t coap_opt_put_uint(uint8_t *buf, uint16_t lastonum, uint16_t onum,
+                         uint32_t value);
+
 /**
  * @brief   Insert block option into buffer from block struct
  *

sys/net/application_layer/nanocoap/nanocoap.c

@@ -810,6 +810,14 @@ size_t coap_opt_put_string(uint8_t *buf, uint16_t lastonum, uint16_t optnum,
     return bufpos - buf;
 }
 
+size_t coap_opt_put_uint(uint8_t *buf, uint16_t lastonum, uint16_t onum,
+                         uint32_t value)
+{
+    unsigned uint_len = _encode_uint(&value);
+
+    return coap_put_option(buf, lastonum, onum, (uint8_t *)&value, uint_len);
+}
+
 /* Common functionality for addition of an option */
 static ssize_t _add_opt_pkt(coap_pkt_t *pkt, uint16_t optnum, const uint8_t *val,
                             size_t val_len)