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/*
Copyright (C) 1995 Free Software Foundation, Inc.
Written by Michael I. Bushnell, p/BSG.
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
The GNU Hurd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include "nfs.h"
#include <rpcsvc/mount.h>
#include <rpc/pmap_prot.h>
#include <errno.h>
#include <sys/socket.h>
#include <netdb.h>
#include <string.h>
#include <netinet/in.h>
#include <stdio.h>
int *
pmap_initialize_rpc (int procnum, void **buf)
{
return initialize_rpc (PMAPPROG, PMAPVERS, procnum, 0, buf, 0, 0, -1);
}
int *
mount_initialize_rpc (int procnum, void **buf)
{
return initialize_rpc (MOUNTPROG, MOUNTVERS, procnum, 0, buf, 0, 0, -1);
}
/* Using the mount protocol, lookup NAME at host HOST.
Return a node for it or null for an error. */
struct node *
mount_root (char *name, char *host)
{
struct sockaddr_in addr;
struct hostent *h;
struct servent *s;
int *p;
void *rpcbuf;
int port;
struct node *np;
/* Lookup the portmapper port number */
s = getservbyname ("portmap", "udp");
if (!s)
{
fprintf (stderr, "portmap/udp: unknown service\n");
return 0;
}
/* Lookup the host */
h = gethostbyname (host);
if (!h)
{
herror (host);
return 0;
}
addr.sin_family = h->h_addrtype;
bcopy (h->h_addr_list[0], &addr.sin_addr, h->h_length);
addr.sin_port = htons (s->s_port);
connect (main_udp_socket,
(struct sockaddr *)&addr, sizeof (struct sockaddr_in));
/* Formulate and send a PMAPPROC_GETPORT request
to lookup the mount program on the server. */
p = pmap_initialize_rpc (PMAPPROC_GETPORT, &rpcbuf);
*p++ = htonl (MOUNTPROG);
*p++ = htonl (MOUNTVERS);
*p++ = htonl (IPPROTO_UDP);
*p++ = htonl (0);
errno = conduct_rpc (&rpcbuf, &p);
if (errno)
{
perror ("portmap of mount");
return 0;
}
/* Fetch the reply port and clean the RPC */
port = ntohl (*p++);
addr.sin_port = htons (port); /* note: htons and ntohl aren't inverses */
free (rpcbuf);
/* Now talking to the mount program, fetch the file handle
for the root. */
connect (main_udp_socket,
(struct sockaddr *) &addr, sizeof (struct sockaddr_in));
p = mount_initialize_rpc (MOUNTPROC_MNT, &rpcbuf);
p = xdr_encode_string (p, name);
errno = conduct_rpc (&rpcbuf, &p);
if (errno)
{
free (rpcbuf);
perror (name);
return 0;
}
/* XXX Protocol spec says this should be a "unix error code"; we'll
pretend that an NFS error code is what's meant, the numbers match
anyhow. */
errno = nfs_error_trans (htonl (*p++));
if (errno)
{
free (rpcbuf);
perror (name);
return 0;
}
/* Create the node for root */
np = lookup_fhandle (p);
p += NFS_FHSIZE / sizeof (int);
free (rpcbuf);
/* Now send another PMAPPROC_GETPORT request to lookup the nfs server. */
addr.sin_port = htons (s->s_port);
connect (main_udp_socket,
(struct sockaddr *) &addr, sizeof (struct sockaddr_in));
p = pmap_initialize_rpc (PMAPPROC_GETPORT, &rpcbuf);
*p++ = htonl (NFS_PROGRAM);
*p++ = htonl (NFS_VERSION);
*p++ = htonl (IPPROTO_UDP);
*p++ = htonl (0);
errno = conduct_rpc (&rpcbuf, &p);
if (errno)
port = NFS_PORT;
else
port = ntohl (*p++);
free (rpcbuf);
addr.sin_port = htons (port);
connect (main_udp_socket,
(struct sockaddr *) &addr, sizeof (struct sockaddr_in));
return np;
}
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