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