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Author: Sergio R. Caprile <scaprile@gmail.com>

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moved all common socket support functions to a new file
(transport).
added new samples to show specific actions.

Signed-off-by: Sergio R. Caprile <scaprile@gmail.com>
This commit is contained in:
Sergio R. Caprile
2014-09-05 10:42:21 -03:00
parent b54b6a8a77
commit efede2d9f9
9 changed files with 471 additions and 419 deletions
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137
samples/qos0pub.c
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@@ -12,116 +12,43 @@
*
* Contributors:
* Ian Craggs - initial API and implementation and/or initial documentation
* Sergio R. Caprile - clarifications and/or documentation extension
*
* Description:
* Short topic name used to avoid registration process
*******************************************************************************/
#include "MQTTSNPacket.h"
#include <sys/types.h>
#if !defined(SOCKET_ERROR)
/** error in socket operation */
#define SOCKET_ERROR -1
#endif
#if defined(WIN32)
/* default on Windows is 64 - increase to make Linux and Windows the same */
#define FD_SETSIZE 1024
#include <winsock2.h>
#include <ws2tcpip.h>
#define MAXHOSTNAMELEN 256
#define EAGAIN WSAEWOULDBLOCK
#define EINTR WSAEINTR
#define EINVAL WSAEINVAL
#define EINPROGRESS WSAEINPROGRESS
#define EWOULDBLOCK WSAEWOULDBLOCK
#define ENOTCONN WSAENOTCONN
#define ECONNRESET WSAECONNRESET
#define ioctl ioctlsocket
#define socklen_t int
#else
#define INVALID_SOCKET SOCKET_ERROR
#include <sys/socket.h>
#include <sys/param.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#endif
#if defined(WIN32)
#include <Iphlpapi.h>
#else
#include <sys/ioctl.h>
#include <net/if.h>
#endif
int Socket_error(char* aString, int sock)
{
#if defined(WIN32)
int errno;
#endif
#if defined(WIN32)
errno = WSAGetLastError();
#endif
if (errno != EINTR && errno != EAGAIN && errno != EINPROGRESS && errno != EWOULDBLOCK)
{
if (strcmp(aString, "shutdown") != 0 || (errno != ENOTCONN && errno != ECONNRESET))
{
int orig_errno = errno;
char* errmsg = strerror(errno);
printf("Socket error %d (%s) in %s for socket %d\n", orig_errno, errmsg, aString, sock);
}
}
return errno;
}
int sendPacketBuffer(int asocket, char* host, int port, unsigned char* buf, int buflen)
{
struct sockaddr_in cliaddr;
int rc = 0;
memset(&cliaddr, 0, sizeof(cliaddr));
cliaddr.sin_family = AF_INET;
cliaddr.sin_addr.s_addr = inet_addr(host);
cliaddr.sin_port = htons(port);
if ((rc = sendto(asocket, buf, buflen, 0, (const struct sockaddr*)&cliaddr, sizeof(cliaddr))) == SOCKET_ERROR)
Socket_error("sendto", asocket);
else
rc = 0;
return rc;
}
#include "MQTTSNPacket.h"
#include "transport.h"
int main(int argc, char** argv)
{
int rc = 0;
int mysock;
unsigned char buf[200];
int buflen = sizeof(buf);
int mysock = 0;
MQTTSN_topicid topic;
unsigned char* payload = (unsigned char*)"mypayload";
int payloadlen = strlen((char*)payload);
int len = 0;
int dup = 0;
int qos = 0;
int retained = 0, packetid = 0;
int retained = 0;
short packetid = 0;
// char *topicname = "a long topic name";
char *host = "127.0.0.1";
char *topicname = "a long topic name";
int port = 1883;
MQTTSNPacket_connectData options = MQTTSNPacket_connectData_initializer;
mysock = transport_open();
if(mysock < 0)
return mysock;
if (argc > 1)
host = argv[1];
@@ -130,24 +57,38 @@ int main(int argc, char** argv)
printf("Sending to hostname %s port %d\n", host, port);
mysock = socket(AF_INET, SOCK_DGRAM, 0);
if (mysock == INVALID_SOCKET)
rc = Socket_error("socket", mysock);
options.clientID.cstring = "myclientid";
len = MQTTSNSerialize_connect(buf, buflen, &options);
rc = sendPacketBuffer(mysock, host, port, buf, len);
rc = transport_sendPacketBuffer(host, port, buf, len);
topic.type = MQTTSN_TOPIC_TYPE_NORMAL;
topic.data.long_.name = topicname;
topic.data.long_.len = strlen(topicname);
/* wait for connack */
if (MQTTSNPacket_read(buf, buflen, transport_getdata) == MQTTSN_CONNACK)
{
int connack_rc = -1;
if (MQTTSNDeserialize_connack(&connack_rc, buf, buflen) != 1 || connack_rc != 0)
{
printf("Unable to connect, return code %d\n", connack_rc);
goto exit;
}
else
printf("connected rc %d\n", connack_rc);
}
else
goto exit;
/* publish with short name */
topic.type = MQTTSN_TOPIC_TYPE_SHORT;
memcpy(topic.data.short_name, "tt", 2);
len = MQTTSNSerialize_publish(buf, buflen, dup, qos, retained, packetid,
topic, payload, payloadlen);
rc = sendPacketBuffer(mysock, host, port, buf, len);
rc = transport_sendPacketBuffer(host, port, buf, len);
printf("rc %d from send packet for publish length %d\n", rc, len);
rc = shutdown(mysock, SHUT_WR);
rc = close(mysock);
exit:
transport_close();
return 0;
}