example/nanocoap: fix block2 payload

examples/nanocoap_server/coap_handler.c

@@ -42,13 +42,13 @@ static ssize_t _riot_block2_handler(coap_pkt_t *pkt, uint8_t *buf, size_t len, v
     *bufpos++ = 0xff;
 
     /* Add actual content */
-    bufpos += coap_blockwise_put_bytes(&slicer, bufpos, block2_intro, sizeof(block2_intro));
-    bufpos += coap_blockwise_put_bytes(&slicer, bufpos, (uint8_t*)RIOT_VERSION, sizeof(RIOT_VERSION));
+    bufpos += coap_blockwise_put_bytes(&slicer, bufpos, block2_intro, sizeof(block2_intro)-1);
+    bufpos += coap_blockwise_put_bytes(&slicer, bufpos, (uint8_t*)RIOT_VERSION, strlen(RIOT_VERSION));
     bufpos += coap_blockwise_put_char(&slicer, bufpos, ')');
-    bufpos += coap_blockwise_put_bytes(&slicer, bufpos, block2_board, sizeof(block2_board));
-    bufpos += coap_blockwise_put_bytes(&slicer, bufpos, (uint8_t*)RIOT_BOARD, sizeof(RIOT_BOARD));
-    bufpos += coap_blockwise_put_bytes(&slicer, bufpos, block2_mcu, sizeof(block2_mcu));
-    bufpos += coap_blockwise_put_bytes(&slicer, bufpos, (uint8_t*)RIOT_MCU, sizeof(RIOT_MCU));
+    bufpos += coap_blockwise_put_bytes(&slicer, bufpos, block2_board, sizeof(block2_board)-1);
+    bufpos += coap_blockwise_put_bytes(&slicer, bufpos, (uint8_t*)RIOT_BOARD, strlen(RIOT_BOARD));
+    bufpos += coap_blockwise_put_bytes(&slicer, bufpos, block2_mcu, sizeof(block2_mcu)-1);
+    bufpos += coap_blockwise_put_bytes(&slicer, bufpos, (uint8_t*)RIOT_MCU, strlen(RIOT_MCU));
     /* To demonstrate individual chars */
     bufpos += coap_blockwise_put_char(&slicer, bufpos, ' ');
     bufpos += coap_blockwise_put_char(&slicer, bufpos, 'M');