unix socket share different docker

unix server 

root@ubuntu:~/docker# docker run -it --name debian  -v /data1/unix_domain:/data1/unix_domain debian
root@b1a3bef38722:/# ls
bin  boot  data1  dev  etc  home  lib  media  mnt  opt  proc  root  run  sbin  server  srv  sys  tmp  usr  var

unix client 

root@ubuntu:~/docker# docker run -it --name debian2  -v /data1/unix_domain:/data1/unix_domain debian
root@d92cea9a459c:/# ls
bin  boot  client  data1  dev  etc  home  lib  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var

docker cp server 和client

root@ubuntu:~/docker/unix-domain-socket-example# docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
b1a3bef38722        debian              "bash"                   23 seconds ago      Up 22 seconds                           debian
176fb79cdcef        nginx:1.17.4        "nginx -g 'daemon of…"   3 weeks ago         Up 3 weeks          80/tcp              test-vm
root@ubuntu:~/docker/unix-domain-socket-example# docker cp bin/server debian:/
root@ubuntu:~/docker/unix-domain-socket-example# docker cp bin/client debian2:/
root@ubuntu:~/docker/unix-domain-socket-example# docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
d92cea9a459c        debian              "bash"                   2 minutes ago       Up 2 minutes                            debian2
b1a3bef38722        debian              "bash"                   4 minutes ago       Up 4 minutes                            debian
176fb79cdcef        nginx:1.17.4        "nginx -g 'daemon of…"   3 weeks ago         Up 3 weeks          80/tcp              test-vm
root@ubuntu:~/docker/unix-domain-socket-example# 

run server

root@b1a3bef38722:/# ./server
recvfrom: iccExchangeAPDU

root@ubuntu:~/docker/unix-domain-socket-example# docker exec -it debian bash
root@b1a3bef38722:/# ls /data1/unix_domain/
server.sock
root@b1a3bef38722:/# 

run client 

root@d92cea9a459c:/# ./client
sent iccExchangeAPDU
receive 15 transmit good!
root@d92cea9a459c:/# 

宿主机上

root@ubuntu:~/docker/unix-domain-socket-example# ls /data1/unix_domain/
server.sock
root@ubuntu:~/docker/unix-domain-socket-example# docker exec -it debian bash
root@b1a3bef38722:/# ls /data1/unix_domain/
server.sock
root@b1a3bef38722:/# 

一对多

server

root@ubuntu:~/docker# docker run -it --name debian_s  -v /data1/unix_domain:/data1/unix_domain debian
root@c66e0ec0c311:/# ./server 
recvfrom: iccExchangeAPDU
recvfrom: iccExchangeAPDU

root@ubuntu:~/docker# docker run -it --name debian_s  -v /data1/unix_domain:/data1/unix_domain debian
root@c66e0ec0c311:/# ./server 
recvfrom: iccExchangeAPDU
recvfrom: iccExchangeAPDU
recvfrom: /data1/unix_domain/client.sockclient2
recvfrom: /data1/unix_domain/client.sockclient3
recvfrom: /data1/unix_domain/client.sockclient2
recvfrom: /data1/unix_domain/client.sockclient3

client1

root@ubuntu:~/docker# docker run -it --name debian2  -v /data1/unix_domain:/data1/unix_domain debian
root@7369904e52f4:/# ls
bin  boot  client  data1  dev  etc  home  lib  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var
root@7369904e52f4:/# ./client client2
sent iccExchangeAPDU
receive 15 transmit good!

root@7369904e52f4:/# ./client client2
sent /data1/unix_domain/client.sockclient2
receive 15 transmit good!

client2

root@ubuntu:~# docker run -it --name debian3  -v /data1/unix_domain:/data1/unix_domain debian
root@6373fc51aeae:/# ./client client3
sent iccExchangeAPDU
receive 15 transmit good!

root@6373fc51aeae:/# ./client client3
sent /data1/unix_domain/client.sockclient3
receive 15 transmit good!

查看套接字

root@ubuntu:~# ls /data1/unix_domain/
root@ubuntu:~# ls /data1/unix_domain/
client.sockclient2  client.sockclient3  server.sock
root@ubuntu:~# 

client 代码

unix-domain-socket-example

#include <stdio.h>
#include <sys/socket.h>
#include <sys/un.h>
#include "ipc.h"

int main(int argc, char *argv[]) {
        int fd;
        struct sockaddr_un addr;
        int ret;
        char buff[8192];
        struct sockaddr_un from;
        int ok = 1;
        int len;
        char buffer[128];

        if ((fd = socket(PF_UNIX, SOCK_DGRAM, 0)) < 0) {
                perror("socket");
                ok = 0;
        }

        if (ok) {
                memset(&addr, 0, sizeof(addr));
                snprintf(buffer,sizeof(buffer)-1,"%s%s",CLIENT_SOCK_FILE,argv[1]);
                addr.sun_family = AF_UNIX;
                strcpy(addr.sun_path, buffer);
                unlink(buffer);
                if (bind(fd, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
                        perror("bind");
                        ok = 0;
                }
        }

        if (ok) {
                memset(&addr, 0, sizeof(addr));
                addr.sun_family = AF_UNIX;
                strcpy(addr.sun_path, SERVER_SOCK_FILE);
                if (connect(fd, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
                        perror("connect");
                        ok = 0;
                }
        }

        if (ok) {
                //strcpy (buff, "iccExchangeAPDU");
                if (send(fd, buffer, strlen(buffer)+1, 0) == -1) {
                        perror("send");
                        ok = 0;
                }
                printf ("sent %s
", buffer);
        }

        if (ok) {
                if ((len = recv(fd, buff, 8192, 0)) < 0) {
                        perror("recv");
                        ok = 0;
                }
                printf ("receive %d %s
", len, buff);
        }

        if (fd >= 0) {
                close(fd);
        }

        getchar();
        unlink (buffer);
        return 0;
}