void coap_SendNotify(AddressType * addr, const char * path, const char * token, int tokenSize, ContentType contentType,
const char * payload, int payloadLen, int sequence)
{
// TODO - FIXME: if path is not full uri then map addr to Network address + append path(?)
coap_packet_t notify;
coap_transaction_t *transaction;
NetworkAddress * remoteAddress = NetworkAddress_New(path, strlen(path));
Lwm2m_Debug("Coap notify: %s\n", path);
//Lwm2m_Debug("Coap IPv6 request address: " PRINT6ADDR(&addr->Addr));
//Lwm2m_Debug("Coap request port: %d\n", addr->Port);
coap_init_message(¬ify, COAP_TYPE_NON, CONTENT_2_05, coap_get_mid());
if (contentType != ContentType_None)
{
coap_set_header_content_format(¬ify, contentType);
coap_set_payload(¬ify, payload, payloadLen);
}
coap_set_token(¬ify, token, tokenSize);
coap_set_header_observe(¬ify, sequence);
if ((transaction = coap_new_transaction(networkSocket, notify.mid, remoteAddress)))
{
transaction->packet_len = coap_serialize_message(¬ify, transaction->packet);
coap_send_transaction(transaction); // for NON confirmable messages this will call coap_clear_transaction();
}
}
void coap_SendNotify(AddressType * addr, const char * path, const char * token, int tokenSize, ContentType contentType, const char * payload, int payloadLen, int sequence)
{
coap_packet_t notify;
coap_transaction_t *transaction;
Lwm2m_Debug("Coap notify: %s\n", path);
Lwm2m_Debug("Coap IPv6 request address: " PRINT6ADDR(&addr->Addr));
Lwm2m_Debug("Coap request port: %d\n", addr->Port);
coap_init_message(¬ify, COAP_TYPE_NON, CONTENT_2_05, coap_get_mid());
if (contentType != ContentType_None)
{
coap_set_header_content_format(¬ify, contentType);
coap_set_payload(¬ify, payload, payloadLen);
}
coap_set_token(¬ify, token, tokenSize);
coap_set_header_observe(¬ify, sequence);
if ((transaction = coap_new_transaction(notify.mid, &addr->Addr, uip_htons(addr->Port))))
{
transaction->packet_len = coap_serialize_message(¬ify, transaction->packet);
coap_send_transaction(transaction); // for NON confirmable messages this will call coap_clear_transaction();
}
}
/*---------------------------------------------------------------------------*/
void
coap_notify_observers(resource_t *resource)
{
/* build notification */
coap_packet_t notification[1]; /* this way the packet can be treated as pointer as usual */
coap_init_message(notification, COAP_TYPE_NON, CONTENT_2_05, 0);
coap_observer_t *obs = NULL;
PRINTF("Observe: Notification from %s\n", resource->url);
/* iterate over observers */
for(obs = (coap_observer_t *)list_head(observers_list); obs;
obs = obs->next) {
if(obs->url == resource->url) { /* using RESOURCE url pointer as handle */
coap_transaction_t *transaction = NULL;
/*TODO implement special transaction for CON, sharing the same buffer to allow for more observers */
if((transaction = coap_new_transaction(coap_get_mid(), &obs->addr, obs->port))) {
if(obs->obs_counter % COAP_OBSERVE_REFRESH_INTERVAL == 0) {
PRINTF(" Force Confirmable for\n");
notification->type = COAP_TYPE_CON;
}
PRINTF(" Observer ");
PRINT6ADDR(&obs->addr);
PRINTF(":%u\n", obs->port);
/* update last MID for RST matching */
obs->last_mid = transaction->mid;
/* prepare response */
notification->mid = transaction->mid;
resource->get_handler(NULL, notification,
transaction->packet + COAP_MAX_HEADER_SIZE,
REST_MAX_CHUNK_SIZE, NULL);
if(notification->code < BAD_REQUEST_4_00) {
coap_set_header_observe(notification, (obs->obs_counter)++);
}
coap_set_token(notification, obs->token, obs->token_len);
transaction->packet_len =
coap_serialize_message(notification, transaction->packet);
coap_send_transaction(transaction);
}
}
}
}
/*----------------------------------------------------------------------------*/
void
coap_separate_resume(void *response, coap_separate_t *separate_store,
uint8_t code)
{
coap_init_message(response, separate_store->type, code,
separate_store->mid);
if(separate_store->token_len) {
coap_set_token(response, separate_store->token,
separate_store->token_len);
}
if(separate_store->block1_size) {
coap_set_header_block1(response, separate_store->block1_num,
0, separate_store->block1_size);
}
}
int main(void)
{
char alias[] = "temp";
char cik[] = "a32c85ba9dda45823be416246cf8b433baa068d7";
char host[] = "coap.exosite.com";
char port[] = "5683";
srand(time(NULL));
// CoAP Message Setup
#define MSG_BUF_LEN 64
uint8_t msg_send_buf[MSG_BUF_LEN];
coap_pdu msg_send = {msg_send_buf, 0, 64};
uint8_t msg_recv_buf[MSG_BUF_LEN];
coap_pdu msg_recv = {msg_recv_buf, 0, 64};
uint16_t message_id_counter = rand();
// Socket to Exosite
int remotesock;
size_t bytes_sent;
ssize_t bytes_recv;
int rv;
struct addrinfo exohints, *servinfo, *q;
memset(&exohints, 0, sizeof exohints);
exohints.ai_family = AF_UNSPEC;
exohints.ai_socktype = SOCK_DGRAM;
exohints.ai_flags = AI_PASSIVE;
if ((rv = getaddrinfo(host, port, &exohints, &servinfo)) != 0) {
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
return 1;
}
// loop through all the results and make a socket
for(q = servinfo; q != NULL; q = q->ai_next) {
if ((remotesock = socket(q->ai_family, q->ai_socktype, q->ai_protocol)) == -1) {
perror("bad socket");
continue;
}
break;
}
if (q == NULL) {
fprintf(stderr, "Failed to Bind Socket\n");
return 2;
}
for (;;)
{
printf("--------------------------------------------------------------------------------\n");
// Build Message
coap_init_pdu(&msg_send);
//memset(msg_send, 0, msg_send_len);
coap_set_version(&msg_send, COAP_V1);
coap_set_type(&msg_send, CT_CON);
coap_set_code(&msg_send, CC_GET); // or POST to write
coap_set_mid(&msg_send, message_id_counter++);
coap_set_token(&msg_send, rand(), 2);
coap_add_option(&msg_send, CON_URI_PATH, (uint8_t*)"1a", 2);
coap_add_option(&msg_send, CON_URI_PATH, (uint8_t*)alias, strlen(alias));
coap_add_option(&msg_send, CON_URI_QUERY, (uint8_t*)cik, strlen(cik));
// to write, set payload:
//coap_set_payload(msg_send, &msg_send_len, MSG_BUF_LEN, (uint8_t*)"99", 2);
// Send Message
if ((bytes_sent = sendto(remotesock, msg_send.buf, msg_send.len, 0, q->ai_addr, q->ai_addrlen)) == -1){
fprintf(stderr, "Failed to Send Message\n");
return 2;
}
printf("Sent.\n");
coap_pretty_print(&msg_send);
// Wait for Response
bytes_recv = recvfrom(remotesock, (void *)msg_recv.buf, msg_recv.max, 0, q->ai_addr, &q->ai_addrlen);
if (bytes_recv < 0) {
fprintf(stderr, "%s\n", strerror(errno));
exit(EXIT_FAILURE);
}
msg_recv.len = bytes_recv;
if(coap_validate_pkt(&msg_recv) == CE_NONE)
{
printf("Got Valid CoAP Packet\n");
if(coap_get_mid(&msg_recv) == coap_get_mid(&msg_send) &&
coap_get_token(&msg_recv) == coap_get_token(&msg_send))
{
printf("Is Response to Last Message\n");
coap_pretty_print(&msg_recv);
}
}else{
printf("Received %zi Bytes, Not Valid CoAP\n", msg_recv.len);
hex_dump(msg_recv.buf, msg_recv.len);
}
sleep(1); // One Second
}
}
/*---------------------------------------------------------------------------*/
int
coap_engine_receive(coap_context_t *coap_ctx)
{
erbium_status_code = NO_ERROR;
coap_packet_t message[1]; /* this way the packet can be treated as pointer as usual */
coap_packet_t response[1];
coap_transaction_t *transaction = NULL;
PRINTF("%s(): received data len %u\n", __FUNCTION__,
(uint16_t)uip_appdatalen(coap_ctx->buf));
if(uip_newdata(coap_ctx->buf)) {
PRINTF("receiving UDP datagram from: ");
PRINT6ADDR(&UIP_IP_BUF(coap_ctx->buf)->srcipaddr);
PRINTF(":%u\n Length: %u\n",
uip_ntohs(UIP_UDP_BUF(coap_ctx->buf)->srcport),
uip_appdatalen(coap_ctx->buf));
erbium_status_code =
coap_parse_message(message, uip_appdata(coap_ctx->buf), uip_appdatalen(coap_ctx->buf));
coap_set_context(message, coap_ctx);
if(erbium_status_code == NO_ERROR) {
NET_COAP_STAT(recv++);
/*TODO duplicates suppression, if required by application */
PRINTF(" Parsed: v %u, t %u, tkl %u, c %u, mid %u\n", message->version,
message->type, message->token_len, message->code, message->mid);
PRINTF(" URL[%d]: %.*s\n", message->uri_path_len, message->uri_path_len, message->uri_path);
PRINTF(" Payload[%d]: %.*s\n", message->payload_len, message->payload_len, message->payload);
/* handle requests */
if(message->code >= COAP_GET && message->code <= COAP_DELETE) {
/* use transaction buffer for response to confirmable request */
if((transaction = coap_new_transaction(message->mid, coap_ctx,
&UIP_IP_BUF(coap_ctx->buf)->srcipaddr,
UIP_UDP_BUF(coap_ctx->buf)->srcport))) {
uint32_t block_num = 0;
uint16_t block_size = REST_MAX_CHUNK_SIZE;
uint32_t block_offset = 0;
int32_t new_offset = 0;
/* prepare response */
if(message->type == COAP_TYPE_CON) {
/* reliable CON requests are answered with an ACK */
coap_init_message(response, COAP_TYPE_ACK, CONTENT_2_05,
message->mid);
} else {
/* unreliable NON requests are answered with a NON as well */
coap_init_message(response, COAP_TYPE_NON, CONTENT_2_05,
coap_get_mid());
/* mirror token */
} if(message->token_len) {
coap_set_token(response, message->token, message->token_len);
/* get offset for blockwise transfers */
}
if(coap_get_header_block2
(message, &block_num, NULL, &block_size, &block_offset)) {
PRINTF("Blockwise: block request %lu (%u/%u) @ %lu bytes\n",
(unsigned long)block_num, block_size, REST_MAX_CHUNK_SIZE, (unsigned long)block_offset);
block_size = MIN(block_size, REST_MAX_CHUNK_SIZE);
new_offset = block_offset;
}
/* invoke resource handler */
if(service_cbk) {
/* call REST framework and check if found and allowed */
if(service_cbk
(message, response, transaction->packet + COAP_MAX_HEADER_SIZE,
block_size, &new_offset)) {
if(erbium_status_code == NO_ERROR) {
/* TODO coap_handle_blockwise(request, response, start_offset, end_offset); */
/* resource is unaware of Block1 */
if(IS_OPTION(message, COAP_OPTION_BLOCK1)
&& response->code < BAD_REQUEST_4_00
&& !IS_OPTION(response, COAP_OPTION_BLOCK1)) {
PRINTF("Block1 NOT IMPLEMENTED\n");
erbium_status_code = NOT_IMPLEMENTED_5_01;
coap_error_message = "NoBlock1Support";
/* client requested Block2 transfer */
} else if(IS_OPTION(message, COAP_OPTION_BLOCK2)) {
/* unchanged new_offset indicates that resource is unaware of blockwise transfer */
if(new_offset == block_offset) {
PRINTF
("Blockwise: unaware resource with payload length %u/%u\n",
response->payload_len, block_size);
if(block_offset >= response->payload_len) {
PRINTF
("handle_incoming_data(): block_offset >= response->payload_len\n");
response->code = BAD_OPTION_4_02;
coap_set_payload(response, "BlockOutOfScope", 15); /* a const char str[] and sizeof(str) produces larger code size */
} else {
coap_set_header_block2(response, block_num,
response->payload_len -
block_offset > block_size,
block_size);
coap_set_payload(response,
response->payload + block_offset,
MIN(response->payload_len -
block_offset, block_size));
} /* if(valid offset) */
/* resource provides chunk-wise data */
} else {
PRINTF("Blockwise: blockwise resource, new offset %ld\n",
(long)new_offset);
coap_set_header_block2(response, block_num,
new_offset != -1
|| response->payload_len >
block_size, block_size);
if(response->payload_len > block_size) {
coap_set_payload(response, response->payload,
block_size);
}
} /* if(resource aware of blockwise) */
/* Resource requested Block2 transfer */
} else if(new_offset != 0) {
PRINTF
("Blockwise: no block option for blockwise resource, using block size %u\n",
COAP_MAX_BLOCK_SIZE);
coap_set_header_block2(response, 0, new_offset != -1,
COAP_MAX_BLOCK_SIZE);
coap_set_payload(response, response->payload,
MIN(response->payload_len,
COAP_MAX_BLOCK_SIZE));
} /* blockwise transfer handling */
} /* no errors/hooks */
/* successful service callback */
/* serialize response */
}
if(erbium_status_code == NO_ERROR) {
if((transaction->packet_len = coap_serialize_message(response,
transaction->
packet)) ==
0) {
erbium_status_code = PACKET_SERIALIZATION_ERROR;
}
}
} else {
erbium_status_code = NOT_IMPLEMENTED_5_01;
coap_error_message = "NoServiceCallbck"; /* no 'a' to fit into 16 bytes */
} /* if(service callback) */
} else {
erbium_status_code = SERVICE_UNAVAILABLE_5_03;
coap_error_message = "NoFreeTraBuffer";
} /* if(transaction buffer) */
/* handle responses */
} else {
if(message->type == COAP_TYPE_CON && message->code == 0) {
PRINTF("Received Ping\n");
erbium_status_code = PING_RESPONSE;
} else if(message->type == COAP_TYPE_ACK) {
/* transactions are closed through lookup below */
PRINTF("Received ACK\n");
} else if(message->type == COAP_TYPE_RST) {
PRINTF("Received RST\n");
/* cancel possible subscriptions */
coap_remove_observer_by_mid(coap_ctx, &UIP_IP_BUF(coap_ctx->buf)->srcipaddr,
UIP_UDP_BUF(coap_ctx->buf)->srcport, message->mid);
}
if((transaction = coap_get_transaction_by_mid(message->mid))) {
/* free transaction memory before callback, as it may create a new transaction */
restful_response_handler callback = transaction->callback;
void *callback_data = transaction->callback_data;
coap_clear_transaction(transaction);
/* check if someone registered for the response */
if(callback) {
callback(callback_data, message);
}
}
/* if(ACKed transaction) */
transaction = NULL;
#if COAP_OBSERVE_CLIENT
/* if observe notification */
if((message->type == COAP_TYPE_CON || message->type == COAP_TYPE_NON)
&& IS_OPTION(message, COAP_OPTION_OBSERVE)) {
PRINTF("Observe [%u]\n", message->observe);
coap_handle_notification(coap_ctx, &UIP_IP_BUF(coap_ctx->buf)->srcipaddr,
UIP_UDP_BUF(coap_ctx->buf)->srcport, message);
}
#endif /* COAP_OBSERVE_CLIENT */
} /* request or response */
} else { /* parsed correctly */
NET_COAP_STAT(recv_err++);
}
/* if(parsed correctly) */
if(erbium_status_code == NO_ERROR) {
if(transaction) {
coap_send_transaction(transaction);
}
} else if(erbium_status_code == MANUAL_RESPONSE) {
PRINTF("Clearing transaction for manual response");
coap_clear_transaction(transaction);
} else {
coap_message_type_t reply_type = COAP_TYPE_ACK;
PRINTF("ERROR %u: %s\n", erbium_status_code, coap_error_message);
coap_clear_transaction(transaction);
if(erbium_status_code == PING_RESPONSE) {
erbium_status_code = 0;
reply_type = COAP_TYPE_RST;
} else if(erbium_status_code >= 192) {
/* set to sendable error code */
erbium_status_code = INTERNAL_SERVER_ERROR_5_00;
/* reuse input buffer for error message */
}
coap_init_message(message, reply_type, erbium_status_code,
message->mid);
coap_set_payload(message, coap_error_message,
strlen(coap_error_message));
coap_send_message(coap_ctx, &UIP_IP_BUF(coap_ctx->buf)->srcipaddr,
UIP_UDP_BUF(coap_ctx->buf)->srcport,
uip_appdata(coap_ctx->buf),
coap_serialize_message(message,
uip_appdata(coap_ctx->buf)));
}
}
/* if(new data) */
return erbium_status_code;
}
void* CoapClient(void* parg)
{
socklen_t sin_size;
struct sockaddr_in addr_remote;
uint16_t message_id_counter;
ssize_t bytes_sent;
ssize_t bytes_recv;
uint8_t msg_buf[MSG_BUF_LEN];
int msg_len;
int fifo_fd;
char fifo[64] = {'\0'};
struct timeval timeout;
timeout.tv_sec = 3;
timeout.tv_usec = 0;
coapIP *ipdata = (coapIP *)parg;
//注册信号
(void)signal(COAP_CLOSE_SIGNAL, Close_Sig);
(void)signal(FIFO_CREATE_SIGNAL, Fifo_Create_Sig);
// CoAP Message Setup
uint8_t msg_send_buf[MSG_BUF_LEN];
coap_pdu msg_send = {msg_send_buf, 0, MSG_BUF_LEN};
uint8_t msg_recv_buf[MSG_BUF_LEN];
coap_pdu msg_recv = {msg_recv_buf, 0, MSG_BUF_LEN};
srand(time(NULL));
message_id_counter = rand();
//创建套接字
if( (ipdata->coapSocket = socket(AF_INET, SOCK_DGRAM, 0))==-1 )
{
zlog_error(zc, "create socket error!");
exit(-1);
}
addr_remote.sin_family = AF_INET;
addr_remote.sin_port = htons(COAP_PORT);
addr_remote.sin_addr.s_addr = inet_addr( ipdata->ip );
memset(addr_remote.sin_zero, 0, 8);
zlog_debug(zc, "coap client socket is %d, ip is %s,path is %s", ipdata->coapSocket, ipdata->ip, ipdata->path);
//设置接收超时
setsockopt(ipdata->coapSocket, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(struct timeval));
GetfifoName( fifo, sizeof(fifo), getpid() );
//等待fifo创建好的信号
//pause();
//以只读方式打开FIFO，返回文件描述符fd
fifo_fd = open(fifo,O_RDONLY);
if( fifo_fd == -1 )
{
printf("Open fifo error!\n");
exit(1);
}
printf("coap client %d open fifo %s\r\n", getpid(), fifo);
while(1)
{
//清空缓存
memset(msg_send.buf, '\0', MSG_BUF_LEN);
msg_send.len = 0;
//从管道读数据
msg_len = read(fifo_fd, msg_buf, MSG_BUF_LEN);
//printf("fifo read is %s", msg_buf);
// Build Message
coap_init_pdu(&msg_send);
coap_set_version(&msg_send, COAP_V1);
coap_set_type(&msg_send, CT_CON);
coap_set_code(&msg_send, CC_GET); // or POST to write
coap_set_mid(&msg_send, message_id_counter++);
coap_set_token(&msg_send, rand(), 2);
coap_add_option(&msg_send, CON_URI_PATH, (uint8_t*)ipdata->path, strlen(ipdata->path));
// to write, set payload:
coap_set_payload( &msg_send, (uint8_t *)msg_buf, msg_len );
// Send Message
if ( (bytes_sent = sendto(ipdata->coapSocket, msg_send.buf, msg_send.len, 0,
(struct sockaddr*)&addr_remote, sizeof(struct sockaddr_in))) == -1 )
zlog_error(zc, "Failed to Send Message!");
else
{
//发送成功
//printf("Sent.\n");
//coap_pretty_print(&msg_send);
sin_size = sizeof(struct sockaddr);
// Wait for Response
bytes_recv = recvfrom(ipdata->coapSocket, (void *)msg_recv.buf, msg_recv.max, 0, (struct sockaddr*)&addr_remote, &sin_size);
if (bytes_recv < 0)
{
zlog_error(zc, "Failed to socket recv Message!");
continue;
}
/*
msg_recv.len = bytes_recv;
if(coap_validate_pkt(&msg_recv) == CE_NONE)
{
printf("Got Valid CoAP Packet\n");
if(coap_get_mid(&msg_recv) == coap_get_mid(&msg_send) && coap_get_token(&msg_recv) == coap_get_token(&msg_send))
{
printf("Is Response to Last Message\n");
coap_pretty_print(&msg_recv);
}
}
else
{
printf("Received %zi Bytes, Not Valid CoAP\n", msg_recv.len);
hex_dump(msg_recv.buf, msg_recv.len);
}
*/
}
}
}
/*---------------------------------------------------------------------------*/
int
coap_receive(oc_message_t *msg)
{
erbium_status_code = NO_ERROR;
LOG("\n\nCoAP Engine: received datalen=%u \n", (unsigned int) msg->length);
/* static declaration reduces stack peaks and program code size */
static coap_packet_t
message[1]; /* this way the packet can be treated as pointer as usual */
static coap_packet_t response[1];
static coap_transaction_t *transaction = NULL;
erbium_status_code = coap_parse_message(message, msg->data, msg->length);
if (erbium_status_code == NO_ERROR) {
/*TODO duplicates suppression, if required by application */
#if DEBUG
LOG(" Parsed: CoAP version: %u, token: 0x%02X%02X, mid: %u\n",
message->version, message->token[0], message->token[1], message->mid);
switch (message->type) {
case COAP_TYPE_CON:
LOG(" type: CON\n");
break;
case COAP_TYPE_NON:
LOG(" type: NON\n");
break;
case COAP_TYPE_ACK:
LOG(" type: ACK\n");
break;
case COAP_TYPE_RST:
LOG(" type: RST\n");
break;
default:
break;
}
#endif
/* handle requests */
if (message->code >= COAP_GET && message->code <= COAP_DELETE) {
#if DEBUG
switch (message->code) {
case COAP_GET:
LOG(" method: GET\n");
break;
case COAP_PUT:
LOG(" method: PUT\n");
break;
case COAP_POST:
LOG(" method: POST\n");
break;
case COAP_DELETE:
LOG(" method: DELETE\n");
break;
}
LOG(" URL: %.*s\n", (int) message->uri_path_len, message->uri_path);
LOG(" Payload: %.*s\n", (int) message->payload_len, message->payload);
#endif
/* use transaction buffer for response to confirmable request */
if ((transaction = coap_new_transaction(message->mid, &msg->endpoint))) {
uint32_t block_num = 0;
uint16_t block_size = COAP_MAX_BLOCK_SIZE;
uint32_t block_offset = 0;
int32_t new_offset = 0;
/* prepare response */
if (message->type == COAP_TYPE_CON) {
/* reliable CON requests are answered with an ACK */
coap_init_message(response, COAP_TYPE_ACK, CONTENT_2_05,
message->mid);
} else {
/* unreliable NON requests are answered with a NON as well */
coap_init_message(response, COAP_TYPE_NON, CONTENT_2_05,
coap_get_mid());
/* mirror token */
}
if (message->token_len) {
coap_set_token(response, message->token, message->token_len);
/* get offset for blockwise transfers */
}
if (coap_get_header_block2(message, &block_num, NULL, &block_size,
&block_offset)) {
LOG("\tBlockwise: block request %u (%u/%u) @ %u bytes\n", (unsigned int) block_num,
block_size, COAP_MAX_BLOCK_SIZE, (unsigned int) block_offset);
block_size = MIN(block_size, COAP_MAX_BLOCK_SIZE);
new_offset = block_offset;
}
/* invoke resource handler in RI layer */
if (oc_ri_invoke_coap_entity_handler(
message, response,
transaction->message->data + COAP_MAX_HEADER_SIZE, block_size,
&new_offset, &msg->endpoint)) {
if (erbium_status_code == NO_ERROR) {
/* TODO coap_handle_blockwise(request, response, start_offset,
* end_offset); */
/* resource is unaware of Block1 */
if (IS_OPTION(message, COAP_OPTION_BLOCK1) &&
response->code < BAD_REQUEST_4_00 &&
!IS_OPTION(response, COAP_OPTION_BLOCK1)) {
LOG("\tBlock1 option NOT IMPLEMENTED\n");
erbium_status_code = NOT_IMPLEMENTED_5_01;
coap_error_message = "NoBlock1Support";
/* client requested Block2 transfer */
} else if (IS_OPTION(message, COAP_OPTION_BLOCK2)) {
/* unchanged new_offset indicates that resource is unaware of
* blockwise transfer */
if (new_offset == block_offset) {
LOG("\tBlockwise: unaware resource with payload length %u/%u\n",
response->payload_len, block_size);
if (block_offset >= response->payload_len) {
LOG("\t\t: block_offset >= response->payload_len\n");
response->code = BAD_OPTION_4_02;
coap_set_payload(response, "BlockOutOfScope",
15); /* a const char str[] and sizeof(str)
produces larger code size */
} else {
coap_set_header_block2(response, block_num,
response->payload_len - block_offset >
block_size,
block_size);
coap_set_payload(
response, response->payload + block_offset,
MIN(response->payload_len - block_offset, block_size));
} /* if(valid offset) */
/* resource provides chunk-wise data */
} else {
LOG("\tBlockwise: blockwise resource, new offset %d\n",
(int) new_offset);
coap_set_header_block2(response, block_num,
new_offset != -1 ||
response->payload_len > block_size,
block_size);
if (response->payload_len > block_size) {
coap_set_payload(response, response->payload, block_size);
}
} /* if(resource aware of blockwise) */
/* Resource requested Block2 transfer */
} else if (new_offset != 0) {
LOG("\tBlockwise: no block option for blockwise resource, using "
"block size %u\n",
COAP_MAX_BLOCK_SIZE);
coap_set_header_block2(response, 0, new_offset != -1,
COAP_MAX_BLOCK_SIZE);
coap_set_payload(response, response->payload,
MIN(response->payload_len, COAP_MAX_BLOCK_SIZE));
} /* blockwise transfer handling */
} /* no errors/hooks */
/* successful service callback */
/* serialize response */
}
if (erbium_status_code == NO_ERROR) {
if ((transaction->message->length = coap_serialize_message(
response, transaction->message->data)) == 0) {
erbium_status_code = PACKET_SERIALIZATION_ERROR;
}
}
} else {
erbium_status_code = SERVICE_UNAVAILABLE_5_03;
coap_error_message = "NoFreeTraBuffer";
} /* if(transaction buffer) */
/* handle responses */
} else { // Fix this
if (message->type == COAP_TYPE_CON) {
erbium_status_code = EMPTY_ACK_RESPONSE;
} else if (message->type == COAP_TYPE_ACK) {
/* transactions are closed through lookup below */
} else if (message->type == COAP_TYPE_RST) {
#ifdef OC_SERVER
/* cancel possible subscriptions */
coap_remove_observer_by_mid(&msg->endpoint, message->mid);
#endif
}
/* Open transaction now cleared for ACK since mid matches */
if ((transaction = coap_get_transaction_by_mid(message->mid))) {
coap_clear_transaction(transaction);
}
/* if(ACKed transaction) */
transaction = NULL;
#ifdef OC_CLIENT // ACKs and RSTs sent to oc_ri.. RSTs cleared, ACKs sent to
// client
oc_ri_invoke_client_cb(message, &msg->endpoint);
#endif
} /* request or response */
} /* parsed correctly */
/* if(parsed correctly) */
if (erbium_status_code == NO_ERROR) {
if (transaction) { // Server transactions sent from here
coap_send_transaction(transaction);
}
} else if (erbium_status_code == CLEAR_TRANSACTION) {
LOG("Clearing transaction for manual response");
coap_clear_transaction(transaction); // used in server for separate response
}
#ifdef OC_CLIENT
else if (erbium_status_code == EMPTY_ACK_RESPONSE) {
coap_init_message(message, COAP_TYPE_ACK, 0, message->mid);
oc_message_t *response = oc_allocate_message();
if (response) {
memcpy(&response->endpoint, &msg->endpoint, sizeof(msg->endpoint));
response->length = coap_serialize_message(message, response->data);
coap_send_message(response);
}
}
#endif /* OC_CLIENT */
#ifdef OC_SERVER
else { // framework errors handled here
coap_message_type_t reply_type = COAP_TYPE_RST;
coap_clear_transaction(transaction);
coap_init_message(message, reply_type, SERVICE_UNAVAILABLE_5_03,
message->mid);
oc_message_t *response = oc_allocate_message();
if (response) {
memcpy(&response->endpoint, &msg->endpoint, sizeof(msg->endpoint));
response->length = coap_serialize_message(message, response->data);
coap_send_message(response);
}
}
#endif /* OC_SERVER */
/* if(new data) */
return erbium_status_code;
}
void coap_createCoapRequest(coap_method_t method, const char * uri, ContentType contentType, ObserveState observeState,
const char * payload, int payloadLen, TransactionCallback callback, void * context)
{
coap_packet_t request;
char path[MAX_COAP_PATH] =
{ 0 };
char query[128] =
{ 0 };
coap_transaction_t *transaction;
NetworkAddress * remoteAddress = NetworkAddress_New(uri, strlen(uri));
coap_getPathQueryFromURI(uri, path, query);
Lwm2m_Info("Coap request: %s\n", uri);
//Lwm2m_Debug("Coap request path: %s\n", path);
//Lwm2m_Debug("Coap request query: %s\n", query);
coap_init_message(&request, COAP_TYPE_CON, method, coap_get_mid());
coap_set_header_uri_path(&request, path);
if (strlen(query) > 0)
coap_set_header_uri_query(&request, query);
// TODO - REVIEW: Erbium must copy path/query from request - else mem out of scope
if (contentType != ContentType_None)
{
if ((method == COAP_POST) || (method == COAP_PUT))
{
coap_set_header_content_format(&request, contentType);
coap_set_payload(&request, payload, payloadLen);
}
else
{
coap_set_header_accept(&request, contentType);
}
}
if (method == COAP_GET)
{
if (observeState == ObserveState_Establish)
{
coap_set_header_observe(&request, 0);
int token = addObserve(remoteAddress, path, callback, context);
if (token != 0)
coap_set_token(&request, (const uint8_t *) &token, sizeof(token));
}
else if (observeState == ObserveState_Cancel)
{
coap_set_header_observe(&request, 1);
int token = removeObserve(remoteAddress, path);
if (token != 0)
coap_set_token(&request, (const uint8_t *) &token, sizeof(token));
}
}
if (CurrentTransaction[CurrentTransactionIndex].TransactionUsed && CurrentTransaction[CurrentTransactionIndex].TransactionPtr)
{
Lwm2m_Warning("Canceled previous transaction [%d]: %p\n", CurrentTransactionIndex,
CurrentTransaction[CurrentTransactionIndex].TransactionPtr);
coap_clear_transaction(&CurrentTransaction[CurrentTransactionIndex].TransactionPtr);
}
//if ((transaction = coap_new_transaction(request.mid, remote_ipaddr, uip_htons(remote_port))))
if ((transaction = coap_new_transaction(networkSocket, request.mid, remoteAddress)))
{
transaction->callback = coap_CoapRequestCallback;
memcpy(CurrentTransaction[CurrentTransactionIndex].Path, path, MAX_COAP_PATH);
CurrentTransaction[CurrentTransactionIndex].Callback = callback;
CurrentTransaction[CurrentTransactionIndex].Context = context;
CurrentTransaction[CurrentTransactionIndex].TransactionUsed = true;
CurrentTransaction[CurrentTransactionIndex].TransactionPtr = transaction;
NetworkAddress_SetAddressType(remoteAddress, &CurrentTransaction[CurrentTransactionIndex].Address);
transaction->callback_data = &CurrentTransaction[CurrentTransactionIndex];
transaction->packet_len = coap_serialize_message(&request, transaction->packet);
Lwm2m_Debug("Sending transaction [%d]: %p\n", CurrentTransactionIndex, CurrentTransaction[CurrentTransactionIndex].TransactionPtr);
coap_send_transaction(transaction);
CurrentTransactionIndex++;
if (CurrentTransactionIndex >= MAX_COAP_TRANSACTIONS)
{
CurrentTransactionIndex = 0;
}
}
}
