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| // ACE组播类 CMulticast 实现
#include "ace/OS_NS_unistd.h"
#include "ace/INET_Addr.h"
#include "ace/Truncate.h"
#include "ace/Log_Msg.h"
#include "ace/os_include/os_netdb.h"
#include "ace/SOCK_Dgram_Mcast.h"
// ACE组播 ip
#define DEFAULT_MULTICAST_ADD "239.192.2.3:12345"
// ACE组播 TTL
#define MAX_MULTICAST_IP_TTL 5
class CMulticast
{
public:
CMulticast(const char address[]):
remote_addr_(u_short(0)), multicast_addr_(address)
{
// ACE组播加入组播组
if (-1 == mcast_dgram_.join(multicast_addr_))
{
ACE_ERROR((LM_ERROR, ACE_TEXT("%p\n"), "join()"));
}
// ACE组播 设置 TTL
if (-1 == mcast_dgram_.set_option(IP_MULTICAST_TTL, MAX_MULTICAST_IP_TTL))
{
ACE_ERROR((LM_ERROR, ACE_TEXT("%p\n"), "set_option()"));
}
}
private:
CMulticast(void){};
public:
ssize_t recv_from_multicast_group(char *buf, size_t n)
{
ssize_t ret = mcast_dgram_.recv(buf, n, remote_addr_);
char hostaddr[MAXHOSTNAME] = {0};
remote_addr_.addr_to_string(hostaddr, MAXHOSTNAME);
cout<<"recve from "<<hostaddr<<" data: "<<buf<<endl;
return ret;
}
ssize_t send_to_multicast_group(const char *buf, size_t n)
{
ssize_t ret = mcast_dgram_.send(buf, n);
char hostaddr[MAXHOSTNAME] = {0};
multicast_addr_.addr_to_string(hostaddr, MAXHOSTNAME);
cout<<"send to "<<hostaddr<<" data: "<<buf<<endl;
return ret;
}
~CMulticast(void)
{
// ACE组播离开组播组
if (-1 == mcast_dgram_.leave(multicast_addr_))
{
ACE_ERROR((LM_ERROR, ACE_TEXT("%p\n"), "leave()"));
}
}
private:
ACE_INET_Addr multicast_addr_; // 组播组地址
ACE_INET_Addr remote_addr_; // 远端地址
ACE_SOCK_Dgram_Mcast mcast_dgram_; //
};
// ACE组播 发送端调用示例
#include "Multicast.h"
#define data[] = "Hello, world!"
int ACE_TMAIN(int argc, ACE_TCHAR *argv[])
{
CMulticast mcast(DEFAULT_MULTICAST_ADD);
while (-1 != mcast.send_to_multicast_group(data, sizeof(data)/sizeof(char)))
{
ACE_OS::sleep(2);
}
ACE_ERROR_RETURN((LM_ERROR, ACE_TEXT("%p\n"), "send()"), 1);
}
// ACE组播 接收端调用示例
#include "Multicast.h"
int ACE_TMAIN(int argc, ACE_TCHAR *argv[])
{
CMulticast mcast(DEFAULT_MULTICAST_ADD);
char buf[256] = {0};
while (-1 != mcast.recv_from_multicast_group(buf, 255))
{
ACE_OS::sleep(2);
}
ACE_ERROR_RETURN((LM_ERROR, ACE_TEXT("%p\n"), "recv()"), 1);
}
|