/*
* Create the marker file descriptor by establishing a loopback connection
* which we shutdown but do not close the fd. The result is an fd that
* can be used for read/write.
*/
static int getMarkerFD()
{
int sv[2];
#ifdef AF_UNIX
if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv) == -1) {
return -1;
}
#else
return -1;
#endif
/*
* Finally shutdown sv[0] (any reads to this fd will get
* EOF; any writes will get an error).
*/
JVM_SocketShutdown(sv[0], 2);
JVM_SocketClose(sv[1]);
return sv[0];
}
/*
* Create the marker file descriptor by establishing a loopback connection
* which we shutdown but do not close the fd. The result is an fd that
* can be used for read/write.
*/
static int getMarkerFD()
{
int server_fd, child_fd, connect_fd;
SOCKADDR him;
int type, len, port;
type = AF_INET;
#ifdef AF_INET6
if (ipv6_available()) {
type = AF_INET6;
}
#endif
/*
* Create listener on any port
*/
server_fd = JVM_Socket(type, SOCK_STREAM, 0);
if (server_fd < 0) {
return -1;
}
if (JVM_Listen(server_fd, 1) == -1) {
JVM_SocketClose(server_fd);
return -1;
}
len = SOCKADDR_LEN;
if (JVM_GetSockName(server_fd, (struct sockaddr *)&him, &len) == -1) {
JVM_SocketClose(server_fd);
return -1;
}
port = NET_GetPortFromSockaddr((struct sockaddr *)&him);
/*
* Establish connection from client socket.
* Server is bound to 0.0.0.0/X or ::/X
* We connect to 127.0.0.1/X or ::1/X
*/
#ifdef AF_INET6
if (ipv6_available()) {
struct sockaddr_in6 *him6 = (struct sockaddr_in6 *)&him;
jbyte caddr[16];
memset((char *) caddr, 0, 16);
caddr[15] = 1;
memset((char *)him6, 0, sizeof(struct sockaddr_in6));
memcpy((void *)&(him6->sin6_addr), caddr, sizeof(struct in6_addr) );
him6->sin6_port = htons((short) port);
him6->sin6_family = AF_INET6;
len = sizeof(struct sockaddr_in6) ;
} else
#endif /* AF_INET6 */
{
struct sockaddr_in *him4 = (struct sockaddr_in*)&him;
memset((char *) him4, 0, sizeof(struct sockaddr_in));
him4->sin_port = htons((short) port);
him4->sin_addr.s_addr = (uint32_t) htonl(0x7f000001);
him4->sin_family = AF_INET;
len = sizeof(struct sockaddr_in);
}
connect_fd = JVM_Socket(type, SOCK_STREAM, 0);
if (connect_fd < 0) {
JVM_SocketClose(server_fd);
return -1;
}
if (JVM_Connect(connect_fd, (struct sockaddr *) &him, len) == -1) {
JVM_SocketClose(server_fd);
JVM_SocketClose(connect_fd);
return -1;
}
/*
* Server accepts connection - do in in non-blocking mode to avoid
* hanging if there's an error (should never happen!!!)
*/
SET_NONBLOCKING(server_fd);
len = SOCKADDR_LEN;
child_fd = JVM_Accept(server_fd, (struct sockaddr *)&him, (jint *)&len);
if (child_fd == -1) {
JVM_SocketClose(server_fd);
JVM_SocketClose(connect_fd);
return -1;
}
/*
* Finally shutdown connect_fd (any reads to this fd will get
* EOF; any writes will get an error).
*/
JVM_SocketShutdown(connect_fd, 2);
JVM_SocketClose(child_fd);
JVM_SocketClose(server_fd);
return connect_fd;
}