63 lines
1.1 KiB
C
63 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
#include <arpa/inet.h>
|
|
#include <error.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
|
|
int main(void)
|
|
{
|
|
int fd1, fd2, one = 1;
|
|
struct sockaddr_in6 bind_addr = {
|
|
.sin6_family = AF_INET6,
|
|
.sin6_port = htons(20000),
|
|
.sin6_flowinfo = htonl(0),
|
|
.sin6_addr = {},
|
|
.sin6_scope_id = 0,
|
|
};
|
|
|
|
inet_pton(AF_INET6, "::", &bind_addr.sin6_addr);
|
|
|
|
fd1 = socket(AF_INET6, SOCK_STREAM, IPPROTO_IP);
|
|
if (fd1 < 0) {
|
|
error(1, errno, "socket fd1");
|
|
return -1;
|
|
}
|
|
|
|
if (setsockopt(fd1, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) {
|
|
error(1, errno, "setsockopt(SO_REUSEADDR) fd1");
|
|
goto out_err1;
|
|
}
|
|
|
|
if (bind(fd1, (struct sockaddr *)&bind_addr, sizeof(bind_addr))) {
|
|
error(1, errno, "bind fd1");
|
|
goto out_err1;
|
|
}
|
|
|
|
if (listen(fd1, 0)) {
|
|
error(1, errno, "listen");
|
|
goto out_err1;
|
|
}
|
|
|
|
fd2 = socket(AF_INET6, SOCK_STREAM, IPPROTO_IP);
|
|
if (fd2 < 0) {
|
|
error(1, errno, "socket fd2");
|
|
goto out_err1;
|
|
}
|
|
|
|
if (connect(fd2, (struct sockaddr *)&bind_addr, sizeof(bind_addr))) {
|
|
error(1, errno, "bind fd2");
|
|
goto out_err2;
|
|
}
|
|
|
|
close(fd2);
|
|
close(fd1);
|
|
return 0;
|
|
|
|
out_err2:
|
|
close(fd2);
|
|
out_err1:
|
|
close(fd1);
|
|
return -1;
|
|
}
|