/*
  msock.h - multicast socket creation routines

  (C) 2016 Christian Beier <dontmind@sdf.org>

*/


#ifndef MSOCK_H
#define MSOCK_H

/* this is for windows compat */
#define SOCKET int

#ifdef __MINGW32__ 
#undef SOCKET
#undef socklen_t 
#define WINVER 0x0501 
#include <ws2tcpip.h> 
#define EWOULDBLOCK WSAEWOULDBLOCK
#define close closesocket
#define socklen_t int
typedef unsigned int in_addr_t;
#else
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/un.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <netdb.h>
#endif

/* Define IPV6_ADD_MEMBERSHIP for FreeBSD and Mac OS X */
#ifndef IPV6_ADD_MEMBERSHIP
#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
#endif



/**
   Creates a socket suitable for sending multicast datagrams via sendto().

   On success, a socket is returned and multicastAddr set with the right info for sendto() calls.
   On error, -1 is returned.
*/
SOCKET mcast_send_socket(char* multicastIP, char* multicastPort,  int multicastTTL, struct addrinfo **multicastAddr);

/**
   Creates a socket suitable for receiving multicast datagrams via recvfrom(). Also sets socket recv buffer.
   
   On success, returns socket.
   On fail, returns -1.
 */
SOCKET mcast_recv_socket(char* multicastIP, char* multicastPort, int multicastRecvBufSize);

/**
   Creates a TCP socket that connects to serverIP:serverPort. 
   Meant to give feedback to a mcast sender.
  
   On success, returns socket.
   On error, -1 is returned.
 */
SOCKET ucast_client_socket(char* serverIP, char* serverPort);

/**
   Creates a TCP socket that binds locally serverPort. 
   Meant to receive feedback to a mcast sender.
  
   On success, returns socket.
   On error, -1 is returned.
 */
SOCKET ucast_server_socket(char* serverPort, int maxPendingConnections);

#endif