| /* |
| * Copyright (c) 2014, Lars Schmertmann <SmallLars@t-online.de>. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the Institute nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * This file is part of the Contiki operating system. |
| */ |
| |
| /** |
| * \file |
| * CoAP module for block 1 handling |
| * \author |
| * Lars Schmertmann <SmallLars@t-online.de> |
| */ |
| |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include "er-coap.h" |
| #include "er-coap-block1.h" |
| |
| #define DEBUG 0 |
| #include "contiki/ip/uip-debug.h" |
| |
| /*----------------------------------------------------------------------------*/ |
| |
| /** |
| * \brief Block 1 support within a coap-ressource |
| * |
| * This function will help you to use block 1. If target is null |
| * error handling and response configuration is active. On return |
| * value 0, the last block was recived, while on return value 1 |
| * more blocks will follow. With target, len and maxlen this |
| * function will assemble the blocks. |
| * |
| * You can find an example in: |
| * examples/er-rest-example/resources/res-b1-sep-b2.c |
| * |
| * \param request Request pointer from the handler |
| * \param response Response pointer from the handler |
| * \param target Pointer to the buffer where the request payload can be assembled |
| * \param len Pointer to the variable, where the function stores the actual length |
| * \param max_len Length of the "target"-Buffer |
| * |
| * \return 0 if initialisation was successful |
| * -1 if initialisation failed |
| */ |
| int |
| coap_block1_handler(void *request, void *response, uint8_t *target, size_t *len, size_t max_len) |
| { |
| const uint8_t *payload = 0; |
| int pay_len = REST.get_request_payload(request, &payload); |
| |
| if(!pay_len || !payload) { |
| erbium_status_code = REST.status.BAD_REQUEST; |
| coap_error_message = "NoPayload"; |
| return -1; |
| } |
| |
| coap_packet_t *packet = (coap_packet_t *)request; |
| |
| if(packet->block1_offset + pay_len > max_len) { |
| erbium_status_code = REST.status.REQUEST_ENTITY_TOO_LARGE; |
| coap_error_message = "Message to big"; |
| return -1; |
| } |
| |
| if(target && len) { |
| memcpy(target + packet->block1_offset, payload, pay_len); |
| *len = packet->block1_offset + pay_len; |
| } |
| |
| if(IS_OPTION(packet, COAP_OPTION_BLOCK1)) { |
| PRINTF("Blockwise: block 1 request: Num: %u, More: %u, Size: %u, Offset: %u\n", |
| packet->block1_num, |
| packet->block1_more, |
| packet->block1_size, |
| packet->block1_offset); |
| |
| coap_set_header_block1(response, packet->block1_num, packet->block1_more, packet->block1_size); |
| if(packet->block1_more) { |
| coap_set_status_code(response, CONTINUE_2_31); |
| return 1; |
| } |
| } |
| |
| return 0; |
| } |