examples/nanocoap: add blockwise block2 example

examples/nanocoap_server/Makefile

@@ -11,7 +11,7 @@ BOARD_INSUFFICIENT_MEMORY := arduino-duemilanove arduino-mega2560 arduino-uno \
                              chronos msb-430 msb-430h nucleo-f031k6 \
                              nucleo-f042k6 nucleo-l031k6 nucleo-f030r8 \
                              nucleo-f303k8 nucleo-l053r8 stm32f0discovery \
-                             telosb waspmote-pro z1
+                             telosb waspmote-pro wsn430-v1_3b wsn430-v1_4 z1
 
 # Include packages that pull up and auto-init the link layer.
 # NOTE: 6LoWPAN will be included if IEEE802.15.4 devices are present

examples/nanocoap_server/coap_handler.c

@@ -17,6 +17,10 @@
 /* internal value that can be read/written via CoAP */
 static uint8_t internal_value = 0;
 
+static const uint8_t block2_intro[] = "This is RIOT (Version: ";
+static const uint8_t block2_board[] = " running on a ";
+static const uint8_t block2_mcu[] = " board with a ";
+
 static ssize_t _riot_board_handler(coap_pkt_t *pkt, uint8_t *buf, size_t len, void *context)
 {
     (void)context;
@@ -24,6 +28,40 @@ static ssize_t _riot_board_handler(coap_pkt_t *pkt, uint8_t *buf, size_t len, vo
             COAP_FORMAT_TEXT, (uint8_t*)RIOT_BOARD, strlen(RIOT_BOARD));
 }
 
+static ssize_t _riot_block2_handler(coap_pkt_t *pkt, uint8_t *buf, size_t len, void *context)
+{
+    (void)context;
+    coap_block_slicer_t slicer;
+    coap_block2_init(pkt, &slicer);
+    uint8_t *payload = buf + coap_get_total_hdr_len(pkt);
+
+    uint8_t *bufpos = payload;
+
+    bufpos += coap_put_option_ct(bufpos, 0, COAP_FORMAT_TEXT);
+    bufpos += coap_opt_put_block2(bufpos, COAP_OPT_CONTENT_FORMAT, &slicer, 1);
+    *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_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));
+    /* To demonstrate individual chars */
+    bufpos += coap_blockwise_put_char(&slicer, bufpos, ' ');
+    bufpos += coap_blockwise_put_char(&slicer, bufpos, 'M');
+    bufpos += coap_blockwise_put_char(&slicer, bufpos, 'C');
+    bufpos += coap_blockwise_put_char(&slicer, bufpos, 'U');
+    bufpos += coap_blockwise_put_char(&slicer, bufpos, '.');
+
+
+    unsigned payload_len = bufpos - payload;
+    return coap_block2_build_reply(pkt, COAP_CODE_205,
+                                   buf, len, payload_len, &slicer);
+}
+
 static ssize_t _riot_value_handler(coap_pkt_t *pkt, uint8_t *buf, size_t len, void *context)
 {
     (void) context;
@@ -109,6 +147,7 @@ const coap_resource_t coap_resources[] = {
     COAP_WELL_KNOWN_CORE_DEFAULT_HANDLER,
     { "/riot/board", COAP_GET, _riot_board_handler, NULL },
     { "/riot/value", COAP_GET | COAP_PUT | COAP_POST, _riot_value_handler, NULL },
+    { "/riot/ver", COAP_GET, _riot_block2_handler, NULL },
     { "/sha256", COAP_POST, _sha256_handler, NULL },
 };