Socket.h

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/*******************************************************************************
 * Copyright (c) 2009, 2020 IBM Corp. and others
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v2.0
 * and Eclipse Distribution License v1.0 which accompany this distribution.
 *
 * The Eclipse Public License is available at
 *    https://www.eclipse.org/legal/epl-2.0/
 * and the Eclipse Distribution License is available at
 *   http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *    Ian Craggs - initial implementation and documentation
 *    Ian Craggs - async client updates
 *******************************************************************************/

#if !defined(SOCKET_H)
#define SOCKET_H

#include <stdint.h>
#include <sys/types.h>

#if defined(_WIN32) || defined(_WIN64)
#include <errno.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#define MAXHOSTNAMELEN 256
#if !defined(SSLSOCKET_H)
#undef EAGAIN
#define EAGAIN WSAEWOULDBLOCK
#undef EINTR
#define EINTR WSAEINTR
#undef EINPROGRESS
#define EINPROGRESS WSAEINPROGRESS
#undef EWOULDBLOCK
#define EWOULDBLOCK WSAEWOULDBLOCK
#undef ENOTCONN
#define ENOTCONN WSAENOTCONN
#undef ECONNRESET
#define ECONNRESET WSAECONNRESET
#undef ETIMEDOUT
#define ETIMEDOUT WAIT_TIMEOUT
#endif
#define ioctl ioctlsocket
#define socklen_t int
#else
#define INVALID_SOCKET SOCKET_ERROR
#include <sys/socket.h>
#if !defined(_WRS_KERNEL)
#include <sys/param.h>
#include <sys/time.h>
#include <sys/select.h>
#include <sys/uio.h>
#else
#include <selectLib.h>
#endif
#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 <unistd.h>
#define ULONG size_t
#endif

#include "mutex_type.h" /* Needed for mutex_type */

#define TCPSOCKET_COMPLETE 0
#if !defined(SOCKET_ERROR)

        #define SOCKET_ERROR -1
#endif

#define TCPSOCKET_INTERRUPTED -22
#define SSL_FATAL -3

#if !defined(INET6_ADDRSTRLEN)
#define INET6_ADDRSTRLEN 46 
#endif


#if !defined(max)
#define max(A,B) ( (A) > (B) ? (A):(B))
#endif

#include "LinkedList.h"

/*
 * Network write buffers for an MQTT packet
 */
typedef struct
{
        int count;         
        char** buffers;    
        size_t* buflens;   
        int* frees;        
        uint8_t mask[4];   
} PacketBuffers;


typedef struct
{
        fd_set rset, 
                rset_saved; 
        int maxfdp1; 
        List* clientsds; 
        ListElement* cur_clientsds; 
        List* connect_pending; 
        List* write_pending; 
        fd_set pending_wset; 
} Sockets;


void Socket_outInitialize(void);
void Socket_outTerminate(void);
int Socket_getReadySocket(int more_work, struct timeval *tp, mutex_type mutex);
int Socket_getch(int socket, char* c);
char *Socket_getdata(int socket, size_t bytes, size_t* actual_len, int* rc);
int Socket_putdatas(int socket, char* buf0, size_t buf0len, PacketBuffers bufs);
void Socket_close(int socket);
#if defined(__GNUC__) && defined(__linux__)
/* able to use GNU's getaddrinfo_a to make timeouts possible */
int Socket_new(const char* addr, size_t addr_len, int port, int* socket, long timeout);
#else
int Socket_new(const char* addr, size_t addr_len, int port, int* socket);
#endif

int Socket_noPendingWrites(int socket);
char* Socket_getpeer(int sock);

void Socket_addPendingWrite(int socket);
void Socket_clearPendingWrite(int socket);

typedef void Socket_writeComplete(int socket, int rc);
void Socket_setWriteCompleteCallback(Socket_writeComplete*);

#endif /* SOCKET_H */