/* Send N bytes of BUF on socket FD to peer at address ADDR (which is
ADDR_LEN bytes long). Returns the number sent, or -1 for errors. */
ssize_t
__sendto (int fd,
const void *buf,
size_t n,
int flags,
const struct sockaddr_un *addr,
socklen_t addr_len)
{
addr_port_t aport = MACH_PORT_NULL;
error_t err;
size_t wrote;
/* Get an address port for the desired destination address. */
error_t create_address_port (io_t port,
const struct sockaddr_un *addr,
socklen_t addr_len,
addr_port_t *aport)
{
error_t err_port;
if (addr->sun_family == AF_LOCAL)
{
/* For the local domain, we must look up the name as a file and talk
to it with the ifsock protocol. */
file_t file = __file_name_lookup (addr->sun_path, 0, 0);
if (file == MACH_PORT_NULL)
return errno;
err_port = __ifsock_getsockaddr (file, aport);
__mach_port_deallocate (__mach_task_self (), file);
if (err_port == MIG_BAD_ID || err_port == EOPNOTSUPP)
/* The file did not grok the ifsock protocol. */
err_port = ENOTSOCK;
}
else
{
err_port = __socket_create_address (port,
addr->sun_family,
(char *) addr,
addr_len,
aport);
}
return err_port;
}
/* Give the socket FD the local address ADDR (which is LEN bytes long). */
int
__bind (int fd, __CONST_SOCKADDR_ARG addrarg, socklen_t len)
{
addr_port_t aport;
error_t err;
const struct sockaddr_un *addr = addrarg.__sockaddr_un__;
if (addr->sun_family == AF_LOCAL)
{
/* For the local domain, we must create a node in the filesystem
using the ifsock translator and then fetch the address from it. */
file_t dir, node;
char name[len - offsetof (struct sockaddr_un, sun_path) + 1], *n;
strncpy (name, addr->sun_path, sizeof name - 1);
name[sizeof name - 1] = '\0'; /* Make sure */
dir = __file_name_split (name, &n);
if (dir == MACH_PORT_NULL)
return -1;
/* Create a new, unlinked node in the target directory. */
err = __dir_mkfile (dir, O_CREAT, 0666 & ~_hurd_umask, &node);
if (! err)
{
/* Set the node's translator to make it a local-domain socket. */
err = __file_set_translator (node,
FS_TRANS_EXCL | FS_TRANS_SET,
FS_TRANS_EXCL | FS_TRANS_SET, 0,
_HURD_IFSOCK, sizeof _HURD_IFSOCK,
MACH_PORT_NULL,
MACH_MSG_TYPE_COPY_SEND);
if (! err)
{
/* Link the node, now a socket, into the target directory. */
err = __dir_link (dir, node, n, 1);
if (err == EEXIST)
err = EADDRINUSE;
}
__mach_port_deallocate (__mach_task_self (), node);
if (! err)
{
/* Get a port to the ifsock translator. */
file_t ifsock = __file_name_lookup_under (dir, n, 0, 0);
if (ifsock == MACH_PORT_NULL)
{
err = errno;
/* If we failed, get rid of the node we created. */
__dir_unlink (dir, n);
}
else
{
/* Get the address port. */
err = __ifsock_getsockaddr (ifsock, &aport);
if (err == MIG_BAD_ID || err == EOPNOTSUPP)
/* We are not talking to /hurd/ifsock. Probably
someone came in after we linked our node, unlinked
it, and replaced it with a different node, before we
did our lookup. Treat it as if our link had failed
with EEXIST. */
err = EADDRINUSE;
}
__mach_port_deallocate (__mach_task_self (), ifsock);
}
}
__mach_port_deallocate (__mach_task_self (), dir);
if (err)
return __hurd_fail (err);
}
/* Give the socket FD the local address ADDR (which is LEN bytes long). */
int
__bind (int fd, __CONST_SOCKADDR_ARG addrarg, socklen_t len)
{
addr_port_t aport;
error_t err;
const struct sockaddr_un *addr = addrarg.__sockaddr_un__;
if (addr->sun_family == AF_LOCAL)
{
/* For the local domain, we must create a node in the filesystem
using the ifsock translator and then fetch the address from it. */
file_t dir, node, ifsock;
char name[len - offsetof (struct sockaddr_un, sun_path) + 1], *n;
strncpy (name, addr->sun_path, sizeof name - 1);
name[sizeof name - 1] = '\0'; /* Make sure */
dir = __file_name_split (name, &n);
if (dir == MACH_PORT_NULL)
return -1;
/* Create a new, unlinked node in the target directory. */
err = __dir_mkfile (dir, O_CREAT, 0666 & ~_hurd_umask, &node);
if (! err)
{
/* Set the node's translator to make it a local-domain socket. */
err = __file_set_translator (node,
FS_TRANS_EXCL | FS_TRANS_SET,
FS_TRANS_EXCL | FS_TRANS_SET, 0,
_HURD_IFSOCK, sizeof _HURD_IFSOCK,
MACH_PORT_NULL,
MACH_MSG_TYPE_COPY_SEND);
if (! err)
{
enum retry_type doretry;
char retryname[1024];
/* Get a port to the ifsock translator. */
err = __dir_lookup (node, "", 0, 0, &doretry, retryname, &ifsock);
if (! err && (doretry != FS_RETRY_NORMAL || retryname[0] != '\0'))
err = EADDRINUSE;
}
if (! err)
{
/* Get the address port. */
err = __ifsock_getsockaddr (ifsock, &aport);
if (err == MIG_BAD_ID || err == EOPNOTSUPP)
err = EGRATUITOUS;
if (! err)
{
/* Link the node, now a socket with proper mode, into the
target directory. */
err = __dir_link (dir, node, n, 1);
if (err == EEXIST)
err = EADDRINUSE;
if (err)
__mach_port_deallocate (__mach_task_self (), aport);
}
__mach_port_deallocate (__mach_task_self (), ifsock);
}
__mach_port_deallocate (__mach_task_self (), node);
}
__mach_port_deallocate (__mach_task_self (), dir);
if (err)
return __hurd_fail (err);
}
