/* * Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich * 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 * An implementation of the Constrained Application Protocol (draft 12) * \author * Matthias Kovatsch */ #include "contiki.h" #include "contiki-net.h" #include #include #include "er-coap-13.h" #include "er-coap-13-transactions.h" #define DEBUG 0 #if DEBUG #include #define PRINTF(...) printf(__VA_ARGS__) #define PRINT6ADDR(addr) PRINTF("[%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x]", ((uint8_t *)addr)[0], ((uint8_t *)addr)[1], ((uint8_t *)addr)[2], ((uint8_t *)addr)[3], ((uint8_t *)addr)[4], ((uint8_t *)addr)[5], ((uint8_t *)addr)[6], ((uint8_t *)addr)[7], ((uint8_t *)addr)[8], ((uint8_t *)addr)[9], ((uint8_t *)addr)[10], ((uint8_t *)addr)[11], ((uint8_t *)addr)[12], ((uint8_t *)addr)[13], ((uint8_t *)addr)[14], ((uint8_t *)addr)[15]) #define PRINTLLADDR(lladdr) PRINTF("[%02x:%02x:%02x:%02x:%02x:%02x]",(lladdr)->addr[0], (lladdr)->addr[1], (lladdr)->addr[2], (lladdr)->addr[3],(lladdr)->addr[4], (lladdr)->addr[5]) #else #define PRINTF(...) #define PRINT6ADDR(addr) #define PRINTLLADDR(addr) #endif /*-----------------------------------------------------------------------------------*/ /*- Variables -----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------------------*/ static struct uip_udp_conn *udp_conn = NULL; static uint16_t current_mid = 0; coap_status_t coap_error_code = NO_ERROR; char *coap_error_message = ""; /*-----------------------------------------------------------------------------------*/ /*- LOCAL HELP FUNCTIONS ------------------------------------------------------------*/ /*-----------------------------------------------------------------------------------*/ static uint16_t coap_log_2(uint16_t value) { uint16_t result = 0; do { value = value >> 1; result++; } while (value); return result ? result - 1 : result; } /*-----------------------------------------------------------------------------------*/ static uint32_t coap_parse_int_option(uint8_t *bytes, size_t length) { uint32_t var = 0; int i = 0; while (i268) { buffer[++written] = (*x-269)>>8; buffer[++written] = (*x-269); } else if (*x>12) { buffer[++written] = (*x-13); } } while (x!=&length && (x=&length)); PRINTF("WRITTEN %u B opt header\n", written); return ++written; } /*-----------------------------------------------------------------------------------*/ static size_t coap_serialize_int_option(unsigned int number, unsigned int current_number, uint8_t *buffer, uint32_t value) { size_t i = 0; if (0xFF000000 & value) ++i; if (0xFFFF0000 & value) ++i; if (0xFFFFFF00 & value) ++i; if (0xFFFFFFFF & value) ++i; PRINTF("OPTION %u (delta %u, len %u)\n", number, number - current_number, i); i = coap_set_option_header(number - current_number, i, buffer); if (0xFF000000 & value) buffer[i++] = (uint8_t) (value>>24); if (0xFFFF0000 & value) buffer[i++] = (uint8_t) (value>>16); if (0xFFFFFF00 & value) buffer[i++] = (uint8_t) (value>>8); if (0xFFFFFFFF & value) buffer[i++] = (uint8_t) (value); return i; } /*-----------------------------------------------------------------------------------*/ static size_t coap_serialize_array_option(unsigned int number, unsigned int current_number, uint8_t *buffer, uint8_t *array, size_t length, char split_char) { size_t i = 0; if (split_char!='\0') { int j; uint8_t *part_start = array; uint8_t *part_end = NULL; size_t temp_length; for (j = 0; j<=length; ++j) { if (array[j]==split_char || j==length) { part_end = array + j; temp_length = part_end-part_start; i += coap_set_option_header(number - current_number, temp_length, &buffer[i]); memcpy(&buffer[i], part_start, temp_length); i += temp_length; PRINTF("OPTION type %u, delta %u, len %u, part [%.*s]\n", number, number - current_number, i, temp_length, part_start); ++j; /* skip the splitter */ current_number = number; part_start = array + j; } } /* for */ } else { i += coap_set_option_header(number - current_number, length, &buffer[i]); memcpy(&buffer[i], array, length); i += length; PRINTF("OPTION type %u, delta %u, len %u\n", number, number - current_number, length); } return i; } /*-----------------------------------------------------------------------------------*/ static void coap_merge_multi_option(char **dst, size_t *dst_len, uint8_t *option, size_t option_len, char separator) { /* Merge multiple options. */ if (*dst_len > 0) { /* dst already contains an option: concatenate */ (*dst)[*dst_len] = separator; *dst_len += 1; /* memmove handles 2-byte option headers */ memmove((*dst)+(*dst_len), option, option_len); *dst_len += option_len; } else { /* dst is empty: set to option */ *dst = (char *) option; *dst_len = option_len; } } /*-----------------------------------------------------------------------------------*/ static int coap_get_variable(const char *buffer, size_t length, const char *name, const char **output) { const char *start = NULL; const char *end = NULL; const char *value_end = NULL; size_t name_len = 0; /*initialize the output buffer first*/ *output = 0; name_len = strlen(name); end = buffer + length; for (start = buffer; start + name_len < end; ++start){ if ((start == buffer || start[-1] == '&') && start[name_len] == '=' && strncmp(name, start, name_len)==0) { /* Point start to variable value */ start += name_len + 1; /* Point end to the end of the value */ value_end = (const char *) memchr(start, '&', end - start); if (value_end == NULL) { value_end = end; } *output = start; return (value_end - start); } } return 0; } /*-----------------------------------------------------------------------------------*/ /*- MEASSAGE SENDING ----------------------------------------------------------------*/ /*-----------------------------------------------------------------------------------*/ void coap_init_connection(uint16_t port) { /* new connection with remote host */ udp_conn = udp_new(NULL, 0, NULL); udp_bind(udp_conn, port); PRINTF("Listening on port %u\n", uip_ntohs(udp_conn->lport)); /* Initialize transaction ID. */ current_mid = random_rand(); } /*-----------------------------------------------------------------------------------*/ uint16_t coap_get_mid() { return ++current_mid; } /*-----------------------------------------------------------------------------------*/ /*- MEASSAGE PROCESSING -------------------------------------------------------------*/ /*-----------------------------------------------------------------------------------*/ void coap_init_message(void *packet, coap_message_type_t type, uint8_t code, uint16_t mid) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; /* Important thing */ memset(coap_pkt, 0, sizeof(coap_packet_t)); coap_pkt->type = type; coap_pkt->code = code; coap_pkt->mid = mid; } /*-----------------------------------------------------------------------------------*/ size_t coap_serialize_message(void *packet, uint8_t *buffer) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; uint8_t *option; unsigned int current_number = 0; /* Initialize */ coap_pkt->buffer = buffer; coap_pkt->version = 1; PRINTF("-Serializing MID %u to %p, ", coap_pkt->mid, coap_pkt->buffer); /* set header fields */ coap_pkt->buffer[0] = 0x00; coap_pkt->buffer[0] |= COAP_HEADER_VERSION_MASK & (coap_pkt->version)<buffer[0] |= COAP_HEADER_TYPE_MASK & (coap_pkt->type)<buffer[0] |= COAP_HEADER_TOKEN_LEN_MASK & (coap_pkt->token_len)<buffer[1] = coap_pkt->code; coap_pkt->buffer[2] = (uint8_t) ((coap_pkt->mid)>>8); coap_pkt->buffer[3] = (uint8_t) (coap_pkt->mid); /* set Token */ PRINTF("Token (len %u)", coap_pkt->token_len); option = coap_pkt->buffer + COAP_HEADER_LEN; for (current_number=0; current_numbertoken_len; ++current_number) { PRINTF(" %02X", coap_pkt->token[current_number]); *option = coap_pkt->token[current_number]; ++option; } PRINTF("-\n"); /* Serialize options */ current_number = 0; PRINTF("-Serializing options at %p-\n", option); /* The options must be serialized in the order of their number */ COAP_SERIALIZE_BYTE_OPTION( COAP_OPTION_IF_MATCH, if_match, "If-Match") COAP_SERIALIZE_STRING_OPTION( COAP_OPTION_URI_HOST, uri_host, '\0', "Uri-Host") COAP_SERIALIZE_BYTE_OPTION( COAP_OPTION_ETAG, etag, "ETag") COAP_SERIALIZE_INT_OPTION( COAP_OPTION_IF_NONE_MATCH, content_type-coap_pkt->content_type, "If-None-Match") /* hack to get a zero field */ COAP_SERIALIZE_INT_OPTION( COAP_OPTION_OBSERVE, observe, "Observe") COAP_SERIALIZE_INT_OPTION( COAP_OPTION_URI_PORT, uri_port, "Uri-Port") COAP_SERIALIZE_STRING_OPTION( COAP_OPTION_LOCATION_PATH, location_path, '/', "Location-Path") COAP_SERIALIZE_STRING_OPTION( COAP_OPTION_URI_PATH, uri_path, '/', "Uri-Path") COAP_SERIALIZE_INT_OPTION( COAP_OPTION_CONTENT_TYPE, content_type, "Content-Format") COAP_SERIALIZE_INT_OPTION( COAP_OPTION_MAX_AGE, max_age, "Max-Age") COAP_SERIALIZE_STRING_OPTION( COAP_OPTION_URI_QUERY, uri_query, '&', "Uri-Query") COAP_SERIALIZE_ACCEPT_OPTION( COAP_OPTION_ACCEPT, accept, "Accept") COAP_SERIALIZE_STRING_OPTION( COAP_OPTION_LOCATION_QUERY, location_query, '&', "Location-Query") COAP_SERIALIZE_BLOCK_OPTION( COAP_OPTION_BLOCK2, block2, "Block2") COAP_SERIALIZE_BLOCK_OPTION( COAP_OPTION_BLOCK1, block1, "Block1") COAP_SERIALIZE_INT_OPTION( COAP_OPTION_SIZE, size, "Size") COAP_SERIALIZE_STRING_OPTION( COAP_OPTION_PROXY_URI, proxy_uri, '\0', "Proxy-Uri") PRINTF("-Done serializing at %p----\n", option); /* Pack payload */ if ((option - coap_pkt->buffer)<=COAP_MAX_HEADER_SIZE) { /* Payload marker */ if (coap_pkt->payload_len) { *option = 0xFF; ++option; } memmove(option, coap_pkt->payload, coap_pkt->payload_len); } else { /* An error occured. Caller must check for !=0. */ coap_pkt->buffer = NULL; coap_error_message = "Serialized header exceeds COAP_MAX_HEADER_SIZE"; return 0; } PRINTF("-Done %u B (header len %u, payload len %u)-\n", coap_pkt->payload_len + option - buffer, option - buffer, coap_pkt->payload_len); PRINTF("Dump [0x%02X %02X %02X %02X %02X %02X %02X %02X]\n", coap_pkt->buffer[0], coap_pkt->buffer[1], coap_pkt->buffer[2], coap_pkt->buffer[3], coap_pkt->buffer[4], coap_pkt->buffer[5], coap_pkt->buffer[6], coap_pkt->buffer[7] ); return (option - buffer) + coap_pkt->payload_len; /* packet length */ } /*-----------------------------------------------------------------------------------*/ void coap_send_message(uip_ipaddr_t *addr, uint16_t port, uint8_t *data, uint16_t length) { /* Configure connection to reply to client */ uip_ipaddr_copy(&udp_conn->ripaddr, addr); udp_conn->rport = port; uip_udp_packet_send(udp_conn, data, length); PRINTF("-sent UDP datagram (%u)-\n", length); /* Restore server connection to allow data from any node */ memset(&udp_conn->ripaddr, 0, sizeof(udp_conn->ripaddr)); udp_conn->rport = 0; } /*-----------------------------------------------------------------------------------*/ coap_status_t coap_parse_message(void *packet, uint8_t *data, uint16_t data_len) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; /* Initialize packet */ memset(coap_pkt, 0, sizeof(coap_packet_t)); /* pointer to packet bytes */ coap_pkt->buffer = data; /* parse header fields */ coap_pkt->version = (COAP_HEADER_VERSION_MASK & coap_pkt->buffer[0])>>COAP_HEADER_VERSION_POSITION; coap_pkt->type = (COAP_HEADER_TYPE_MASK & coap_pkt->buffer[0])>>COAP_HEADER_TYPE_POSITION; coap_pkt->token_len = MIN(COAP_TOKEN_LEN, (COAP_HEADER_TOKEN_LEN_MASK & coap_pkt->buffer[0])>>COAP_HEADER_TOKEN_LEN_POSITION); coap_pkt->code = coap_pkt->buffer[1]; coap_pkt->mid = coap_pkt->buffer[2]<<8 | coap_pkt->buffer[3]; if (coap_pkt->version != 1) { coap_error_message = "CoAP version must be 1"; return BAD_REQUEST_4_00; } uint8_t *current_option = data + COAP_HEADER_LEN; memcpy(coap_pkt->token, current_option, coap_pkt->token_len); PRINTF("Token (len %u) [0x%02X%02X%02X%02X%02X%02X%02X%02X]\n", coap_pkt->token_len, coap_pkt->token[0], coap_pkt->token[1], coap_pkt->token[2], coap_pkt->token[3], coap_pkt->token[4], coap_pkt->token[5], coap_pkt->token[6], coap_pkt->token[7] ); /*FIXME always prints 8 bytes */ /* parse options */ memset(coap_pkt->options, 0, sizeof(coap_pkt->options)); current_option += coap_pkt->token_len; unsigned int option_number = 0; unsigned int option_delta = 0; size_t option_length = 0; while (current_option < data+data_len) { /* Payload marker 0xFF, currently only checking for 0xF* because rest is reserved */ if ((current_option[0] & 0xF0)==0xF0) { coap_pkt->payload = ++current_option; coap_pkt->payload_len = data_len - (coap_pkt->payload - data); /* also for receiving, the Erbium upper bound is REST_MAX_CHUNK_SIZE */ if (coap_pkt->payload_len > REST_MAX_CHUNK_SIZE) { coap_pkt->payload_len = REST_MAX_CHUNK_SIZE; } /* Null-terminate payload */ coap_pkt->payload[coap_pkt->payload_len] = '\0'; break; } option_delta = current_option[0]>>4; option_length = current_option[0] & 0x0F; ++current_option; /* avoids code duplication without function overhead */ unsigned int *x = &option_delta; do { if (*x==13) { *x += current_option[0]; ++current_option; } else if (*x==14) { *x += 255; *x += current_option[0]<<8; ++current_option; *x += current_option[0]; ++current_option; } } while (x!=&option_length && (x=&option_length)); option_number += option_delta; PRINTF("OPTION %u (delta %u, len %u): ", option_number, option_delta, option_length); SET_OPTION(coap_pkt, option_number); switch (option_number) { case COAP_OPTION_CONTENT_TYPE: coap_pkt->content_type = coap_parse_int_option(current_option, option_length); PRINTF("Content-Format [%u]\n", coap_pkt->content_type); break; case COAP_OPTION_MAX_AGE: coap_pkt->max_age = coap_parse_int_option(current_option, option_length); PRINTF("Max-Age [%lu]\n", coap_pkt->max_age); break; case COAP_OPTION_ETAG: coap_pkt->etag_len = MIN(COAP_ETAG_LEN, option_length); memcpy(coap_pkt->etag, current_option, coap_pkt->etag_len); PRINTF("ETag %u [0x%02X%02X%02X%02X%02X%02X%02X%02X]\n", coap_pkt->etag_len, coap_pkt->etag[0], coap_pkt->etag[1], coap_pkt->etag[2], coap_pkt->etag[3], coap_pkt->etag[4], coap_pkt->etag[5], coap_pkt->etag[6], coap_pkt->etag[7] ); /*FIXME always prints 8 bytes */ break; case COAP_OPTION_ACCEPT: if (coap_pkt->accept_num < COAP_MAX_ACCEPT_NUM) { coap_pkt->accept[coap_pkt->accept_num] = coap_parse_int_option(current_option, option_length); coap_pkt->accept_num += 1; PRINTF("Accept [%u]\n", coap_pkt->content_type); } break; case COAP_OPTION_IF_MATCH: /*FIXME support multiple ETags */ coap_pkt->if_match_len = MIN(COAP_ETAG_LEN, option_length); memcpy(coap_pkt->if_match, current_option, coap_pkt->if_match_len); PRINTF("If-Match %u [0x%02X%02X%02X%02X%02X%02X%02X%02X]\n", coap_pkt->if_match_len, coap_pkt->if_match[0], coap_pkt->if_match[1], coap_pkt->if_match[2], coap_pkt->if_match[3], coap_pkt->if_match[4], coap_pkt->if_match[5], coap_pkt->if_match[6], coap_pkt->if_match[7] ); /*FIXME always prints 8 bytes */ break; case COAP_OPTION_IF_NONE_MATCH: coap_pkt->if_none_match = 1; PRINTF("If-None-Match\n"); break; case COAP_OPTION_URI_HOST: coap_pkt->uri_host = (char *) current_option; coap_pkt->uri_host_len = option_length; PRINTF("Uri-Host [%.*s]\n", coap_pkt->uri_host_len, coap_pkt->uri_host); break; case COAP_OPTION_URI_PORT: coap_pkt->uri_port = coap_parse_int_option(current_option, option_length); PRINTF("Uri-Port [%u]\n", coap_pkt->uri_port); break; case COAP_OPTION_URI_PATH: /* coap_merge_multi_option() operates in-place on the IPBUF, but final packet field should be const string -> cast to string */ coap_merge_multi_option( (char **) &(coap_pkt->uri_path), &(coap_pkt->uri_path_len), current_option, option_length, '/'); PRINTF("Uri-Path [%.*s]\n", coap_pkt->uri_path_len, coap_pkt->uri_path); break; case COAP_OPTION_URI_QUERY: /* coap_merge_multi_option() operates in-place on the IPBUF, but final packet field should be const string -> cast to string */ coap_merge_multi_option( (char **) &(coap_pkt->uri_query), &(coap_pkt->uri_query_len), current_option, option_length, '&'); PRINTF("Uri-Query [%.*s]\n", coap_pkt->uri_query_len, coap_pkt->uri_query); break; case COAP_OPTION_LOCATION_PATH: /* coap_merge_multi_option() operates in-place on the IPBUF, but final packet field should be const string -> cast to string */ coap_merge_multi_option( (char **) &(coap_pkt->location_path), &(coap_pkt->location_path_len), current_option, option_length, '/'); PRINTF("Location-Path [%.*s]\n", coap_pkt->location_path_len, coap_pkt->location_path); break; case COAP_OPTION_LOCATION_QUERY: /* coap_merge_multi_option() operates in-place on the IPBUF, but final packet field should be const string -> cast to string */ coap_merge_multi_option( (char **) &(coap_pkt->location_query), &(coap_pkt->location_query_len), current_option, option_length, '&'); PRINTF("Location-Query [%.*s]\n", coap_pkt->location_query_len, coap_pkt->location_query); break; case COAP_OPTION_PROXY_URI: /*FIXME check for own end-point */ coap_pkt->proxy_uri = (char *) current_option; coap_pkt->proxy_uri_len = option_length; /*TODO length > 270 not implemented (actually not required) */ PRINTF("Proxy-Uri NOT IMPLEMENTED [%.*s]\n", coap_pkt->proxy_uri_len, coap_pkt->proxy_uri); coap_error_message = "This is a constrained server (Contiki)"; return PROXYING_NOT_SUPPORTED_5_05; break; case COAP_OPTION_OBSERVE: coap_pkt->observe = coap_parse_int_option(current_option, option_length); PRINTF("Observe [%lu]\n", coap_pkt->observe); break; case COAP_OPTION_BLOCK2: coap_pkt->block2_num = coap_parse_int_option(current_option, option_length); coap_pkt->block2_more = (coap_pkt->block2_num & 0x08)>>3; coap_pkt->block2_size = 16 << (coap_pkt->block2_num & 0x07); coap_pkt->block2_offset = (coap_pkt->block2_num & ~0x0000000F)<<(coap_pkt->block2_num & 0x07); coap_pkt->block2_num >>= 4; PRINTF("Block2 [%lu%s (%u B/blk)]\n", coap_pkt->block2_num, coap_pkt->block2_more ? "+" : "", coap_pkt->block2_size); break; case COAP_OPTION_BLOCK1: coap_pkt->block1_num = coap_parse_int_option(current_option, option_length); coap_pkt->block1_more = (coap_pkt->block1_num & 0x08)>>3; coap_pkt->block1_size = 16 << (coap_pkt->block1_num & 0x07); coap_pkt->block1_offset = (coap_pkt->block1_num & ~0x0000000F)<<(coap_pkt->block1_num & 0x07); coap_pkt->block1_num >>= 4; PRINTF("Block1 [%lu%s (%u B/blk)]\n", coap_pkt->block1_num, coap_pkt->block1_more ? "+" : "", coap_pkt->block1_size); break; case COAP_OPTION_SIZE: coap_pkt->size = coap_parse_int_option(current_option, option_length); PRINTF("Size [%lu]\n", coap_pkt->size); break; default: PRINTF("unknown (%u)\n", option_number); /* Check if critical (odd) */ if (option_number & 1) { coap_error_message = "Unsupported critical option"; return BAD_OPTION_4_02; } } current_option += option_length; } /* for */ PRINTF("-Done parsing-------\n"); return NO_ERROR; } /*-----------------------------------------------------------------------------------*/ /*- REST FRAMEWORK FUNCTIONS --------------------------------------------------------*/ /*-----------------------------------------------------------------------------------*/ int coap_get_query_variable(void *packet, const char *name, const char **output) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (IS_OPTION(coap_pkt, COAP_OPTION_URI_QUERY)) { return coap_get_variable(coap_pkt->uri_query, coap_pkt->uri_query_len, name, output); } return 0; } int coap_get_post_variable(void *packet, const char *name, const char **output) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (coap_pkt->payload_len) { return coap_get_variable((const char *)coap_pkt->payload, coap_pkt->payload_len, name, output); } return 0; } /*-----------------------------------------------------------------------------------*/ int coap_set_status_code(void *packet, unsigned int code) { if (code <= 0xFF) { ((coap_packet_t *)packet)->code = (uint8_t) code; return 1; } else { return 0; } } /*-----------------------------------------------------------------------------------*/ /*- HEADER OPTION GETTERS AND SETTERS -----------------------------------------------*/ /*-----------------------------------------------------------------------------------*/ unsigned int coap_get_header_content_type(void *packet) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (!IS_OPTION(coap_pkt, COAP_OPTION_CONTENT_TYPE)) return -1; return coap_pkt->content_type; } int coap_set_header_content_type(void *packet, unsigned int content_type) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; coap_pkt->content_type = (coap_content_type_t) content_type; SET_OPTION(coap_pkt, COAP_OPTION_CONTENT_TYPE); return 1; } /*-----------------------------------------------------------------------------------*/ int coap_get_header_accept(void *packet, const uint16_t **accept) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (!IS_OPTION(coap_pkt, COAP_OPTION_ACCEPT)) return 0; *accept = coap_pkt->accept; return coap_pkt->accept_num; } int coap_set_header_accept(void *packet, uint16_t accept) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (coap_pkt->accept_num < COAP_MAX_ACCEPT_NUM) { coap_pkt->accept[coap_pkt->accept_num] = accept; coap_pkt->accept_num += 1; SET_OPTION(coap_pkt, COAP_OPTION_ACCEPT); } return coap_pkt->accept_num; } /*-----------------------------------------------------------------------------------*/ int coap_get_header_max_age(void *packet, uint32_t *age) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (!IS_OPTION(coap_pkt, COAP_OPTION_MAX_AGE)) { *age = COAP_DEFAULT_MAX_AGE; } else { *age = coap_pkt->max_age; } return 1; } int coap_set_header_max_age(void *packet, uint32_t age) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; coap_pkt->max_age = age; SET_OPTION(coap_pkt, COAP_OPTION_MAX_AGE); return 1; } /*-----------------------------------------------------------------------------------*/ int coap_get_header_etag(void *packet, const uint8_t **etag) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (!IS_OPTION(coap_pkt, COAP_OPTION_ETAG)) return 0; *etag = coap_pkt->etag; return coap_pkt->etag_len; } int coap_set_header_etag(void *packet, const uint8_t *etag, size_t etag_len) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; coap_pkt->etag_len = MIN(COAP_ETAG_LEN, etag_len); memcpy(coap_pkt->etag, etag, coap_pkt->etag_len); SET_OPTION(coap_pkt, COAP_OPTION_ETAG); return coap_pkt->etag_len; } /*-----------------------------------------------------------------------------------*/ /*FIXME support multiple ETags */ int coap_get_header_if_match(void *packet, const uint8_t **etag) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (!IS_OPTION(coap_pkt, COAP_OPTION_IF_MATCH)) return 0; *etag = coap_pkt->if_match; return coap_pkt->if_match_len; } int coap_set_header_if_match(void *packet, const uint8_t *etag, size_t etag_len) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; coap_pkt->if_match_len = MIN(COAP_ETAG_LEN, etag_len); memcpy(coap_pkt->if_match, etag, coap_pkt->if_match_len); SET_OPTION(coap_pkt, COAP_OPTION_IF_MATCH); return coap_pkt->if_match_len; } /*-----------------------------------------------------------------------------------*/ int coap_get_header_if_none_match(void *packet) { return IS_OPTION((coap_packet_t *)packet, COAP_OPTION_IF_NONE_MATCH) ? 1 : 0; } int coap_set_header_if_none_match(void *packet) { SET_OPTION((coap_packet_t *)packet, COAP_OPTION_IF_NONE_MATCH); return 1; } /*-----------------------------------------------------------------------------------*/ int coap_get_header_token(void *packet, const uint8_t **token) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; *token = coap_pkt->token; return coap_pkt->token_len; } int coap_set_header_token(void *packet, const uint8_t *token, size_t token_len) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; coap_pkt->token_len = MIN(COAP_TOKEN_LEN, token_len); memcpy(coap_pkt->token, token, coap_pkt->token_len); return coap_pkt->token_len; } /*-----------------------------------------------------------------------------------*/ int coap_get_header_proxy_uri(void *packet, const char **uri) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (!IS_OPTION(coap_pkt, COAP_OPTION_PROXY_URI)) return 0; *uri = coap_pkt->proxy_uri; return coap_pkt->proxy_uri_len; } int coap_set_header_proxy_uri(void *packet, const char *uri) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; coap_pkt->proxy_uri = uri; coap_pkt->proxy_uri_len = strlen(uri); SET_OPTION(coap_pkt, COAP_OPTION_PROXY_URI); return coap_pkt->proxy_uri_len; } /*-----------------------------------------------------------------------------------*/ int coap_get_header_uri_host(void *packet, const char **host) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (!IS_OPTION(coap_pkt, COAP_OPTION_URI_HOST)) return 0; *host = coap_pkt->uri_host; return coap_pkt->uri_host_len; } int coap_set_header_uri_host(void *packet, const char *host) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; coap_pkt->uri_host = host; coap_pkt->uri_host_len = strlen(host); SET_OPTION(coap_pkt, COAP_OPTION_URI_HOST); return coap_pkt->uri_host_len; } /*-----------------------------------------------------------------------------------*/ int coap_get_header_uri_path(void *packet, const char **path) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (!IS_OPTION(coap_pkt, COAP_OPTION_URI_PATH)) return 0; *path = coap_pkt->uri_path; return coap_pkt->uri_path_len; } int coap_set_header_uri_path(void *packet, const char *path) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; while (path[0]=='/') ++path; coap_pkt->uri_path = path; coap_pkt->uri_path_len = strlen(path); SET_OPTION(coap_pkt, COAP_OPTION_URI_PATH); return coap_pkt->uri_path_len; } /*-----------------------------------------------------------------------------------*/ int coap_get_header_uri_query(void *packet, const char **query) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (!IS_OPTION(coap_pkt, COAP_OPTION_URI_QUERY)) return 0; *query = coap_pkt->uri_query; return coap_pkt->uri_query_len; } int coap_set_header_uri_query(void *packet, const char *query) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; while (query[0]=='?') ++query; coap_pkt->uri_query = query; coap_pkt->uri_query_len = strlen(query); SET_OPTION(coap_pkt, COAP_OPTION_URI_QUERY); return coap_pkt->uri_query_len; } /*-----------------------------------------------------------------------------------*/ int coap_get_header_location_path(void *packet, const char **path) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (!IS_OPTION(coap_pkt, COAP_OPTION_LOCATION_PATH)) return 0; *path = coap_pkt->location_path; return coap_pkt->location_path_len; } int coap_set_header_location_path(void *packet, const char *path) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; char *query; while (path[0]=='/') ++path; if ((query = strchr(path, '?'))) { coap_set_header_location_query(packet, query+1); coap_pkt->location_path_len = query - path; } else { coap_pkt->location_path_len = strlen(path); } coap_pkt->location_path = path; SET_OPTION(coap_pkt, COAP_OPTION_LOCATION_PATH); return coap_pkt->location_path_len; } /*-----------------------------------------------------------------------------------*/ int coap_get_header_location_query(void *packet, const char **query) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (!IS_OPTION(coap_pkt, COAP_OPTION_LOCATION_QUERY)) return 0; *query = coap_pkt->location_query; return coap_pkt->location_query_len; } int coap_set_header_location_query(void *packet, const char *query) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; while (query[0]=='?') ++query; coap_pkt->location_query = query; coap_pkt->location_query_len = strlen(query); SET_OPTION(coap_pkt, COAP_OPTION_LOCATION_QUERY); return coap_pkt->location_query_len; } /*-----------------------------------------------------------------------------------*/ int coap_get_header_observe(void *packet, uint32_t *observe) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (!IS_OPTION(coap_pkt, COAP_OPTION_OBSERVE)) return 0; *observe = coap_pkt->observe; return 1; } int coap_set_header_observe(void *packet, uint32_t observe) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; coap_pkt->observe = 0x00FFFFFF & observe; SET_OPTION(coap_pkt, COAP_OPTION_OBSERVE); return 1; } /*-----------------------------------------------------------------------------------*/ int coap_get_header_block2(void *packet, uint32_t *num, uint8_t *more, uint16_t *size, uint32_t *offset) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (!IS_OPTION(coap_pkt, COAP_OPTION_BLOCK2)) return 0; /* pointers may be NULL to get only specific block parameters */ if (num!=NULL) *num = coap_pkt->block2_num; if (more!=NULL) *more = coap_pkt->block2_more; if (size!=NULL) *size = coap_pkt->block2_size; if (offset!=NULL) *offset = coap_pkt->block2_offset; return 1; } int coap_set_header_block2(void *packet, uint32_t num, uint8_t more, uint16_t size) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (size<16) return 0; if (size>2048) return 0; if (num>0x0FFFFF) return 0; coap_pkt->block2_num = num; coap_pkt->block2_more = more ? 1 : 0; coap_pkt->block2_size = size; SET_OPTION(coap_pkt, COAP_OPTION_BLOCK2); return 1; } /*-----------------------------------------------------------------------------------*/ int coap_get_header_block1(void *packet, uint32_t *num, uint8_t *more, uint16_t *size, uint32_t *offset) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (!IS_OPTION(coap_pkt, COAP_OPTION_BLOCK1)) return 0; /* pointers may be NULL to get only specific block parameters */ if (num!=NULL) *num = coap_pkt->block1_num; if (more!=NULL) *more = coap_pkt->block1_more; if (size!=NULL) *size = coap_pkt->block1_size; if (offset!=NULL) *offset = coap_pkt->block1_offset; return 1; } int coap_set_header_block1(void *packet, uint32_t num, uint8_t more, uint16_t size) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (size<16) return 0; if (size>2048) return 0; if (num>0x0FFFFF) return 0; coap_pkt->block1_num = num; coap_pkt->block1_more = more; coap_pkt->block1_size = size; SET_OPTION(coap_pkt, COAP_OPTION_BLOCK1); return 1; } /*-----------------------------------------------------------------------------------*/ int coap_get_header_size(void *packet, uint32_t *size) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (!IS_OPTION(coap_pkt, COAP_OPTION_SIZE)) return 0; *size = coap_pkt->size; return 1; } int coap_set_header_size(void *packet, uint32_t size) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; coap_pkt->size = size; SET_OPTION(coap_pkt, COAP_OPTION_SIZE); return 1; } /*-----------------------------------------------------------------------------------*/ /*- PAYLOAD -------------------------------------------------------------------------*/ /*-----------------------------------------------------------------------------------*/ int coap_get_payload(void *packet, const uint8_t **payload) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; if (coap_pkt->payload) { *payload = coap_pkt->payload; return coap_pkt->payload_len; } else { *payload = NULL; return 0; } } int coap_set_payload(void *packet, const void *payload, size_t length) { coap_packet_t *const coap_pkt = (coap_packet_t *) packet; //PRINTF("setting payload (%u/%u)\n", length, REST_MAX_CHUNK_SIZE); coap_pkt->payload = (uint8_t *) payload; coap_pkt->payload_len = MIN(REST_MAX_CHUNK_SIZE, length); return coap_pkt->payload_len; } /*-----------------------------------------------------------------------------------*/