network.c

一个关于 RTP的例子

/*******
**
** FILE INFO:
** project:	RTP_lib
** file:	Network.c
** started on:	04/11/03
** started by:	Cedric Lacroix <[e-mail]>
**
**
** TODO:
**
** BUGS:
**
** UPDATE INFO:
** updated on:	05/13/03
** updated by:	Cedric Lacroix <[e-mail]>
**
********/


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

#include		<netinet/in.h>
#include		<arpa/inet.h>

#include		<stdio.h>
#include		<stdlib.h>
#include		<string.h>
#include		<unistd.h>
#include		<err.h>

#include 		"Config.h"
#include 		"RTP.h"
#include 		"Proto.h"
#include 		"Macros.h"
#include 		"Network.h"


/***********************/
/** Under Unix system **/
/***********************/

/**
 **  Set TTL
 **/
int			Set_TTL_Unix(SOCKET sock, u_int8 ttl)
{
	setsockopt(sock, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(u_int8));
	return (0);
}


/**************************/
/** Under Windows system **/
/**************************/

/**
 **  Set TTL
 **/
int			Set_TTL_Win32(SOCKET sock, u_int8 ttl)
{
	//int		buff;

	//WSAIoctl(sock, SIO_MULTICAST_SCOPE, &ttl, sizeof (u_int8), NULL, 0, &buff, NULL, NULL);
	return (0);
}

/**
 **  Initialize the sockets under Windows
 **/
int			Init_Socket(void)
{
	//WSADATA	WSAData;

	//WSAStartup(MAKEWORD(2,0), &WSAData);
	return (0);

}

/**
 **  Close the sockets under Windows
 **/
int			Close_Socket(void)
{
	//WSACleanup();
	return (0);
}

/************************************************/
/************************************************/


/**
 **  Return "1" if ip_addr is a multicast address
 **/
int			test_multicast(char *ip_addr)
{
	char		a_part1[4];
	char		i_part1;

	strncpy(a_part1, ip_addr, 3);
	a_part1[3] = '\0';
	i_part1 = atoi(a_part1);
	if ((i_part1 & 0xe0) == 0xe0)
		return (1);
	else
		return (0);
}


/**
 **  Create and bind the socket
 **/
SOCKET			Create_Socket(SOCKADDR_IN sin)
{
	SOCKET 		sock;

	sock = socket(AF_INET, SOCK_DGRAM, 0);
	bind(sock, (SOCKADDR *)&sin, sizeof(sin));
	return (sock);
}