Move MQTTSNPacket into subdirectory

MQTTSNPacket/samples/transport.c

@@ -0,0 +1,141 @@
+/*******************************************************************************
+ * Copyright (c) 2014 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * and Eclipse Distribution License v1.0 which accompany this distribution.
+ *
+ * The Eclipse Public License is available at
+ *    http://www.eclipse.org/legal/epl-v10.html
+ * and the Eclipse Distribution License is available at
+ *   http://www.eclipse.org/org/documents/edl-v10.php.
+ *
+ * Contributors:
+ *    Ian Craggs - initial API and implementation and/or initial documentation
+ *    Sergio R. Caprile - "commonalization" from prior samples and/or documentation extension
+ *******************************************************************************/
+
+#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
+
+/**
+This simple low-level implementation assumes a single connection for a single thread. Thus, a static
+variable is used for that connection.
+On other scenarios, the user must solve this by taking into account that the current implementation of
+MQTTSNPacket_read() has a function pointer for a function call to get the data to a buffer, but no provisions
+to know the caller or other indicator (the socket id): int (*getfn)(unsigned char*, int)
+*/
+static int mysock = INVALID_SOCKET;
+
+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 transport_sendPacketBuffer(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(mysock, buf, buflen, 0, (const struct sockaddr*)&cliaddr, sizeof(cliaddr))) == SOCKET_ERROR)
+		Socket_error("sendto", mysock);
+	else
+		rc = 0;
+	return rc;
+}
+
+
+int transport_getdata(unsigned char* buf, int count)
+{
+	int rc = recvfrom(mysock, buf, count, 0, NULL, NULL);
+	//printf("received %d bytes count %d\n", rc, (int)count);
+	return rc;
+}
+
+/**
+return >=0 for a socket descriptor, <0 for an error code
+*/
+int transport_open()
+{
+	mysock = socket(AF_INET, SOCK_DGRAM, 0);
+	if (mysock == INVALID_SOCKET)
+		return Socket_error("socket", mysock);
+
+	return mysock;
+}
+
+int transport_close()
+{
+int rc;
+
+	rc = shutdown(mysock, SHUT_WR);
+	rc = close(mysock);
+
+	return rc;
+}