74 lines
2.1 KiB
C++
74 lines
2.1 KiB
C++
|
/*************************************************************************
|
||
|
> File Name: ipc_udp_server.cpp
|
||
|
> Author: TianLun Song
|
||
|
> Mail: songtianlun@frytea.com
|
||
|
> Blog: https://blog.frytea.com
|
||
|
> Created Time: Wed 13 Jan 2021 09:53:06 AM CST
|
||
|
************************************************************************/
|
||
|
#include <sys/types.h>
|
||
|
#include <sys/socket.h>
|
||
|
#include <sys/un.h>
|
||
|
#include <memory.h>
|
||
|
#include <unistd.h>
|
||
|
#include <stdio.h>
|
||
|
#include <iostream>
|
||
|
|
||
|
using namespace std;
|
||
|
const char* server_file = "/tmp/criu/ipc_udp_server.sock";
|
||
|
|
||
|
int main(int argc,char** argv)
|
||
|
{
|
||
|
int socket_fd = socket(AF_UNIX,SOCK_DGRAM,0);
|
||
|
if (socket_fd < 0)
|
||
|
{
|
||
|
perror("socket");
|
||
|
return -1;
|
||
|
}
|
||
|
struct sockaddr_un addr;
|
||
|
memset(&addr,0,sizeof(addr));
|
||
|
addr.sun_family = AF_UNIX;
|
||
|
strcpy(addr.sun_path,server_file);
|
||
|
if (access(addr.sun_path,0) != -1)
|
||
|
{
|
||
|
remove(addr.sun_path);
|
||
|
}
|
||
|
if (bind(socket_fd,(sockaddr*)&addr,sizeof(addr)) < 0)
|
||
|
{
|
||
|
perror("bind");
|
||
|
return -1;
|
||
|
}
|
||
|
struct sockaddr_un clientaddr;
|
||
|
socklen_t addrlen = sizeof(clientaddr);
|
||
|
char msg_buf[1024];
|
||
|
while (1)
|
||
|
{
|
||
|
// printf("socket file is ok: %d", access(addr.sun_path, F_OK));
|
||
|
// if(access(addr.sun_path, F_OK) !=0 )
|
||
|
// {
|
||
|
// bind(socket(AF_UNIX,SOCK_DGRAM,0),(sockaddr*)&addr,sizeof(addr));
|
||
|
// printf("socket file is missing, rebind.\n");
|
||
|
// }
|
||
|
memset(msg_buf,'\0',1024);
|
||
|
int rsize = recvfrom(socket_fd,msg_buf,sizeof(msg_buf),0,(sockaddr*)&clientaddr,&addrlen);
|
||
|
if (rsize < 0)
|
||
|
{
|
||
|
perror("server recv error!");
|
||
|
continue;
|
||
|
}
|
||
|
cout << "I'm Unix socket(UDP) server, recv a msg: " << msg_buf << " from: " << clientaddr.sun_path << endl;
|
||
|
strcpy(msg_buf, "OK,I got it!");
|
||
|
int ssize = sendto(socket_fd, msg_buf, sizeof msg_buf,0,(sockaddr*)&clientaddr,addrlen);
|
||
|
if (ssize < 0)
|
||
|
{
|
||
|
perror("server send error!");
|
||
|
continue;
|
||
|
}
|
||
|
sleep(1);
|
||
|
}
|
||
|
if (close(socket_fd) < 0)
|
||
|
{
|
||
|
perror("close socket");
|
||
|
return -1;
|
||
|
}
|
||
|
return 0;
|
||
|
}
|