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HelloWorld_subscriber.c

[$(HOME)/rti_workspace//examples/connext_dds/c/hello_world_dtls/HelloWorld_subscriber.c]

/* HelloWorld_subscriber.c
A subscription example
This file is derived from code automatically generated by the rtiddsgen
command:
rtiddsgen -language C -example <arch> HelloWorld.idl
Example subscription of type HelloWorld automatically generated by
'rtiddsgen'. To test them follow these steps:
(1) Compile this file and the example publication.
(2) Start the subscription on the same domain used for RTI Connext with the command
objs/<arch>/HelloWorld_subscriber <domain_id> <sample_count>
(3) Start the publication on the same domain used for RTI Connext with the command
objs/<arch>/HelloWorld_publisher <domain_id> <sample_count>
(4) [Optional] Specify the list of discovery initial peers and
multicast receive addresses via an environment variable or a file
(in the current working directory) called NDDS_DISCOVERY_PEERS.
You can run any number of publishers and subscribers programs, and can
add and remove them dynamically from the domain.
Example:
To run the example application on domain <domain_id>:
On Unix:
objs/<arch>/HelloWorld_publisher <domain_id>
objs/<arch>/HelloWorld_subscriber <domain_id>
On Windows:
objs<arch>\HelloWorld_publisher <domain_id>
objs<arch>\HelloWorld_subscriber <domain_id>
modification history
------------ -------
*/
#include <stdio.h>
#include <stdlib.h>
#include "ndds/ndds_c.h"
#include "HelloWorld.h"
#include "HelloWorldSupport.h"
#ifdef RTI_STATIC
#include "transport_tls/transport_tls_plugin.h"
#endif
void HelloWorldListener_on_requested_deadline_missed(
void* listener_data,
DDS_DataReader* reader,
const struct DDS_RequestedDeadlineMissedStatus *status)
{
}
void HelloWorldListener_on_requested_incompatible_qos(
void* listener_data,
DDS_DataReader* reader,
const struct DDS_RequestedIncompatibleQosStatus *status)
{
}
void HelloWorldListener_on_sample_rejected(
void* listener_data,
DDS_DataReader* reader,
const struct DDS_SampleRejectedStatus *status)
{
}
void HelloWorldListener_on_liveliness_changed(
void* listener_data,
DDS_DataReader* reader,
const struct DDS_LivelinessChangedStatus *status)
{
}
void HelloWorldListener_on_sample_lost(
void* listener_data,
DDS_DataReader* reader,
const struct DDS_SampleLostStatus *status)
{
}
void HelloWorldListener_on_subscription_matched(
void* listener_data,
DDS_DataReader* reader,
const struct DDS_SubscriptionMatchedStatus *status)
{
}
void HelloWorldListener_on_data_available(
void* listener_data,
DDS_DataReader* reader)
{
HelloWorldDataReader *HelloWorld_reader = NULL;
struct HelloWorldSeq data_seq = DDS_SEQUENCE_INITIALIZER;
int i;
HelloWorld_reader = HelloWorldDataReader_narrow(reader);
if (HelloWorld_reader == NULL) {
fprintf(stderr, "DataReader narrow error\n");
return;
}
retcode = HelloWorldDataReader_take(
HelloWorld_reader,
&data_seq, &info_seq, DDS_LENGTH_UNLIMITED,
if (retcode == DDS_RETCODE_NO_DATA) {
return;
} else if (retcode != DDS_RETCODE_OK) {
fprintf(stderr, "take error %d\n", retcode);
return;
}
for (i = 0; i < HelloWorldSeq_get_length(&data_seq); ++i) {
if (DDS_SampleInfoSeq_get_reference(&info_seq, i)->valid_data) {
HelloWorldTypeSupport_print_data(
HelloWorldSeq_get_reference(&data_seq, i));
fflush(stdout);
}
}
retcode = HelloWorldDataReader_return_loan(
HelloWorld_reader,
&data_seq, &info_seq);
if (retcode != DDS_RETCODE_OK) {
fprintf(stderr, "return loan error %d\n", retcode);
}
}
/* Delete all entities */
static int subscriber_shutdown(
DDS_DomainParticipant *participant)
{
int status = 0;
if (participant != NULL) {
if (retcode != DDS_RETCODE_OK) {
fprintf(stderr, "delete_contained_entities error %d\n", retcode);
status = -1;
}
if (retcode != DDS_RETCODE_OK) {
fprintf(stderr, "delete_participant error %d\n", retcode);
status = -1;
}
}
/* RTI Connext provides finalize_instance() method on
domain participant factory for people who want to release memory used
by the participant factory singleton. Uncomment the following block of
code for clean destruction of the singleton. */
/*
retcode = DDS_DomainParticipantFactory_finalize_instance();
if (retcode != DDS_RETCODE_OK) {
fprintf(stderr, "finalize_instance error %d\n", retcode);
status = -1;
}
*/
return status;
}
int subscriber_main(int domainId, int sample_count)
{
DDS_DomainParticipant *participant = NULL;
DDS_Subscriber *subscriber = NULL;
DDS_Topic *topic = NULL;
struct DDS_DataReaderListener reader_listener =
DDS_DataReader *reader = NULL;
const char *type_name = NULL;
int count = 0;
struct DDS_Duration_t poll_period = {4,0};
struct DDS_DomainParticipantQos participant_qos =
/* Get default participant QoS from participant factory */
DDS_TheParticipantFactory, &participant_qos);
if (retcode != DDS_RETCODE_OK) {
fprintf(stderr, "Failed to get default participant qos\n");
subscriber_shutdown(participant);
return -1;
}
/* Disable builtin transports */
/* Set up property Qos to load plugin */
&participant_qos.property,
"dds.transport.load_plugins", "dds.transport.DTLS.dtls1",
DDS_BOOLEAN_FALSE);
if (retcode != DDS_RETCODE_OK) {
fprintf(stderr, "Failed to add property dds.transport.load_plugins\n");
subscriber_shutdown(participant);
}
#ifdef RTI_STATIC
/* create function ptr */
&participant_qos.property,
"dds.transport.DTLS.dtls1.create_function_ptr",
if (retcode != DDS_RETCODE_OK) {
fprintf(stderr, "Failed to add property dds.transport.DTLS.dtls1.create_function_ptr\n");
subscriber_shutdown(participant);
}
#else
/* library */
&participant_qos.property,
"dds.transport.DTLS.dtls1.library",
"nddstransporttls",
DDS_BOOLEAN_FALSE);
if (retcode != DDS_RETCODE_OK) {
fprintf(stderr, "Failed to add property dds.transport.DTLS.dtls1.library\n");
subscriber_shutdown(participant);
}
/* create function */
&participant_qos.property,
"dds.transport.DTLS.dtls1.create_function",
"NDDS_Transport_DTLS_create",
DDS_BOOLEAN_FALSE);
if (retcode != DDS_RETCODE_OK) {
fprintf(stderr, "Failed to add property dds.transport.DTLS.dtls1.create_function\n");
subscriber_shutdown(participant);
}
#endif
/* certificate authority */
&participant_qos.property,
"dds.transport.DTLS.dtls1.tls.verify.ca_file", "cacert.pem",
DDS_BOOLEAN_FALSE);
if (retcode != DDS_RETCODE_OK) {
fprintf(stderr, "Failed to add property dds.transport.DTLS.dtls1.tls.verify.ca_file\n");
subscriber_shutdown(participant);
}
/* certificate chain */
&participant_qos.property,
"dds.transport.DTLS.dtls1.tls.identity.certificate_chain_file",
"peer2.pem", DDS_BOOLEAN_FALSE);
if (retcode != DDS_RETCODE_OK) {
fprintf(stderr, "Failed to add property dds.transport.DTLS.dtls1.tls.identity.certificate_chain_file\n");
subscriber_shutdown(participant);
}
DDS_TheParticipantFactory, domainId, &participant_qos,
NULL /* listener */, DDS_STATUS_MASK_NONE);
if (participant == NULL) {
fprintf(stderr, "create_participant error\n");
subscriber_shutdown(participant);
return -1;
}
/* To customize subscriber QoS, use
DDS_DomainParticipant_get_default_subscriber_qos() */
participant, &DDS_SUBSCRIBER_QOS_DEFAULT, NULL /* listener */,
if (subscriber == NULL) {
fprintf(stderr, "create_subscriber error\n");
subscriber_shutdown(participant);
return -1;
}
/* Register type before creating topic */
type_name = HelloWorldTypeSupport_get_type_name();
retcode = HelloWorldTypeSupport_register_type(participant, type_name);
if (retcode != DDS_RETCODE_OK) {
fprintf(stderr, "register_type error %d\n", retcode);
subscriber_shutdown(participant);
return -1;
}
/* To customize topic QoS, use
DDS_DomainParticipant_get_default_topic_qos() */
participant, "Example HelloWorld",
type_name, &DDS_TOPIC_QOS_DEFAULT, NULL /* listener */,
if (topic == NULL) {
fprintf(stderr, "create_topic error\n");
subscriber_shutdown(participant);
return -1;
}
/* Setup data reader listener */
reader_listener.on_requested_deadline_missed =
HelloWorldListener_on_requested_deadline_missed;
HelloWorldListener_on_requested_incompatible_qos;
reader_listener.on_sample_rejected =
HelloWorldListener_on_sample_rejected;
reader_listener.on_liveliness_changed =
HelloWorldListener_on_liveliness_changed;
reader_listener.on_sample_lost =
HelloWorldListener_on_sample_lost;
reader_listener.on_subscription_matched =
HelloWorldListener_on_subscription_matched;
reader_listener.on_data_available =
HelloWorldListener_on_data_available;
/* To customize data reader QoS, use
DDS_Subscriber_get_default_datareader_qos() */
subscriber, DDS_Topic_as_topicdescription(topic),
if (reader == NULL) {
fprintf(stderr, "create_datareader error\n");
subscriber_shutdown(participant);
return -1;
}
/* Main loop */
for (count=0; (sample_count == 0) || (count < sample_count); ++count) {
printf("HelloWorld subscriber sleeping for %d sec...\n",
poll_period.sec);
fflush(stdout);
NDDS_Utility_sleep(&poll_period);
}
/* Cleanup and delete delete all entities */
return subscriber_shutdown(participant);
}
#if defined(RTI_WINCE)
int wmain(int argc, wchar_t** argv)
{
int domainId = 0;
int sample_count = 0; /* infinite loop */
if (argc >= 2) {
domainId = _wtoi(argv[1]);
}
if (argc >= 3) {
sample_count = _wtoi(argv[2]);
}
/* Uncomment this to turn on additional logging
NDDS_Config_Logger_set_verbosity_by_category(
NDDS_Config_Logger_get_instance(),
NDDS_CONFIG_LOG_CATEGORY_API,
NDDS_CONFIG_LOG_VERBOSITY_STATUS_ALL);
*/
return subscriber_main(domainId, sample_count);
}
#elif !(defined(RTI_VXWORKS) && !defined(__RTP__)) && !defined(RTI_PSOS)
int main(int argc, char *argv[])
{
int domainId = 0;
int sample_count = 0; /* infinite loop */
if (argc >= 2) {
domainId = atoi(argv[1]);
}
if (argc >= 3) {
sample_count = atoi(argv[2]);
}
/* Uncomment this to turn on additional logging
NDDS_Config_Logger_set_verbosity_by_category(
NDDS_Config_Logger_get_instance(),
NDDS_CONFIG_LOG_CATEGORY_API,
NDDS_CONFIG_LOG_VERBOSITY_STATUS_ALL);
*/
return subscriber_main(domainId, sample_count);
}
#endif

RTI Secure Wan Transport Version 6.0.0 Copyright © Sun Mar 3 2019 Real-Time Innovations, Inc